Films of styrene resins

 

The invention relates to hydrophilic processing of films made from styrene resins, and the use of modifiers to improve, for example, antistatic properties and sliding properties (slipperiness) of the films. In particular, it relates to the films subject to mechanical processing, for example, on a machine for manufacturing bags or applicator films for Windows, in particular, films of styrene resins suitable for use as films for Windows. Film of the styrene resin includes exposed on both sides of the hydrophilic processing of the film base of the styrene resin composition comprising at least an antistatic agent and an agent that improves external slip applied on the treated surface. The ratio of the surface tension of the first side to the opposite side is from 1.15 to 1.72, and the mass of the coating composition on the opposite surface ranges from 25 to 95 wt.% by weight of the coating composition on the first surface. The agent, which improves the exterior slide, chosen from the group comprising inorganic microparticles and modified simple ether silicones. The obtained films given antistatic is the film envelope and paper and to avoid positioning errors between the film and the boundaries of the window at high speed coating film on the Windows in the conditions of high-speed torsion film (i.e., 600 R/min or more). 3 c. and 7 C.p. f-crystals, 17 PL.

The present invention relates to hydrophilic processing of films made from styrene resins, and the use of modifiers to improve, for example, antistatic properties and sliding properties(slipperiness) of the films. In particular, it relates to the films subject to mechanical processing, for example, on a machine for manufacturing bags or applicator films for Windows, in particular, films of styrene resins suitable for use as films for Windows.

Because of its hardness and high transparency of the film of the styrene resins are often used as food packaging films for salads, shitake (shiitake) and bananas, as well as films for Windows (i.e. film applied to the Windows in the envelopes).

Film of the styrene resins are used as food packaging films, because they are characterized by high visibility of the food product due to its high transparency and high permeability, resulting in the preservation of fresh food products with considerable evaporation (for example, raw shiitake) for extended periods of time. Polyethylene plerogyra with significant evaporation.

In particular, the film of the styrene resins are often used as a film for Windows in envelopes, because you are less rigid films (for example, polyethylene films, polypropylene films) inherent imperfections such as wrinkles, at the stage of application to the Windows in envelopes, and therefore they are not suitable for these purposes.

An example of the use of the films of styrene resins for the manufacture of food packaging bags in order to preserve the freshness is published application JP-A-8-230933, which opens the film of the styrene resin. This film in sheet form can be recycled into bags that are manually filled food products. However, this film is not subjected to any surface treatment that creates a problem of shift in the manufacture of sacks, since the sliding resistance and the resistance to opening (i.e., ease of opening of the bags during filling their food) insufficient on stage auto-fill bags of food (such as shiitake), in particular, when high-speed processing film bags and automatic filling of bags of food.

In recent years, bananas Packed in bags, obtained the CT, as the bananas, the bag should be equipped with a wide aperture. Thus, the static electrification due to friction of the upper and lower sheets of film hinders the opening of the bag, thus creating a difficult problem loading bananas in the bag.

To solve this problem, the proposed film of the styrene resin, the surface of which is covered with a modifier. However, such film of the styrene resin have a number of disadvantages, which will be discussed below.

As noted above, according to common practice, undertaking a variety of surface treatments to improve the skid resistance of the film base of the styrene resin and imparting antistatic properties, providing thus the possibility of exceptional mechanical processing of films from styrene resins, for example, the manufacture of bags, and the coating film on the window in the envelope.

For example, JP-A-53-115781 proposes a method in which the surface of the main film of the styrene resin is subjected to a hydrophilic treatment (for example, by corona discharge) to obtain the surface tension of from 400 to 550 microns/cm, and then the surface is applied a modifier containing protivoukachiwauschee substance and silicone oil. With the of azrad and the modifier is applied on the thus treated surface. On the other hand, JP-A-10-119978 discloses a method of applying an antistatic agent to both surfaces of the base material.

In recent times the speed of processing machines for making bags, in particular on the applicators film for Windows in envelopes and automatic machines for the paper, was able to increase up to 1000 sheets/minute and above, compared with the currently used machines (i.e., from 400 to 600 sheets/min). When this trend to higher speed processing becomes necessary to film for Windows had two mutually exclusive properties, namely, that it has anti-static properties on both surfaces and possessed a level of adhesion to paper. Indeed, the film disclosed in JP-A-10-119978, from the point of view of static electricity has fewer drawbacks. However, it is not equipped with any means of protection from scratches. In addition, in this case not completely solved the problem of wrinkling and positioning errors after gluing. Namely, the problem of static electricity can be removed simply by applying a large amount of antistatic agent on the major surface of the film by giving them superior anti agent, applied with a thick layer prevents the penetration of the adhesive to the surfaces of the film base and its curing, which results in the formation of folds and the positioning error.

On the other hand, JP-A-2-72050 reveals the film of the styrene resin containing a parting agent-based wax, and JP-A-2-72051 reveals the film of the styrene resin containing granulated parting agent. Although the film described in the above-mentioned documents have lower damage to the film due to the improvement in the resistance to slip, yet their use is associated with the private problems associated with static electricity.

With anti-static treatment exclusively one surface according to JP-A-53-115781 obtained film can hardly be used as a film for Windows in the envelopes. Roll film of styrene resin, mounted in the applicator film for Windows, unwound, and then carry out its contact with the metal rollers or rubber rollers before gluing the film to envelope paper. Because at the stage of contacting people use a variety of rolls, both surfaces of the film come into contact with the rollers and the result is electrostatic is offering it on the leaves of a certain size will occur twisting them against each other directly before contact with the paper for envelopes, that makes it impossible for a continuous recycling process.

Therefore, use of bilateral processing of a film of thermoplastic resin window envelopes according to JP-A-10-119978. However, this bilateral application described in the above document, there is a need to solve the following problem.

Namely, the tape applicator film for Windows disclosed in the above document, not subjected to any hydrophilic treatment on both surfaces, but on both surfaces of the film applied antistatic agent with the same coating weight, and then twisted it into a roll. Thus obtained film roll is placed in the applicator foil squares and then roll out when used as a film for Windows. However, at the stage of unwinding the problem with the fact that the antistatic agent is applied on both surfaces of equal mass, partly (or mostly at least) migrates from one surface to the opposite surface, depending on the tension coiling and other environmental parameters (e.g. temperature, relative humidity) at the stage of winding and storage conditions (e.g. temperature, relative is with the length. When the surface film containing a large amount of the antistatic agent must be connected with the paper for envelopes, antistatic agent is included in the process of adhesion and thus causes the positioning error between the film and the window of the envelope, thereby reducing the commercial value of the products.

The present invention is to impart antistatic properties to both surfaces of the film with the receipt of a film, suitable for mechanical processing using, for example, high-speed printer, machines for making bags or high-speed applicator film for Windows in envelopes, in particular, films of styrene resin having improved adhesion to paper in accordance with the requirements of the applicator film for Windows in envelopes, and the way it was received.

This problem is solved by adding the front and rear surfaces of the film base surface tension by the hydrophilic treatment, and then applying almost the same modifier compositions on both surfaces of the film base, each with a corresponding weight of the coating. The invention is based on this the second film base made of styrene resin, subjected on both sides hydrophilic treatment composition comprising at least an antistatic agent and foreign agent that increases the lubricity deposited on each of the treated surfaces, and the ratio (/) surface tension () on one surface (A) of the film base to the surface tension (on the opposite surface (b) is from 1.15 to 1.72; surface tension () is from 350 to 450 microns/cm; the surface tension () is from 400 to 600 microns/cm; and weight of the coating composition on the surface (b) is from 25 to 95 wt.% by weight of the coating composition on the surface (A).

In addition, the present invention relates to a method for producing the film of the styrene resin, which includes: the implementation of the hydrophilic treatment so that the surface tension () on one surface (A) of the film base has ranged from 400 to 600 microns/cm, the surface tension (on the opposite side (In) film base ranged from 350 to 450 microns/cm, and the bearing of the composition, containing at least an antistatic agent and modifier external resistance to sliding on the surface (A); after drying, the winding of the film of the styrene resin in the coil; and the transfer so songs from the surface (a) surface (B). Hereinafter the present invention will be described in detail. Film base, intended for use in the present invention, as a main component contains a styrene resin. That is, the content of the styrene resin is up to 50 wt.% or more on composition-based resin constituting the base film. Styrene resin, designed for use in the present invention is a transparent polymer containing up to 50 wt.% or more Monomeric styrene. Examples include the well-known polymer resin, such as polystyrene, a copolymer of stimulational, the copolymer steroetypical and ternary copolymer of stirolbutadienovye; the so-called modified rubber polystyrene resin containing synthetic rubber (for example, polybutadiene, butadiene-styrene statistical copolymer, butadiene-styrene block copolymer), dispersed in them in the form of soft components shall esterol General purpose (GPPS) or resin, obtained by dispersion of synthetic rubber in General purpose polystyrene.

Film of the styrene resin designed for use as a film base as such, is hydrophobic on both surfaces. Therefore, when the surface film is applied containing modifier aqueous solution obtained by dissolving an antistatic agent or antivairus agent in water, it formed droplets containing modifier in the aqueous solution, and the uniform application becomes impossible. In addition, an aqueous emulsion, which is used as an adhesive at the stage of bonding the surface of the film to the envelope paper should quickly reach the surface and Tvarditsa on it. Thus, the surface of the film should be made hydrophilic. As described below, the hydrophilic treatment can be carried out using acids such as sulfuric acid, nitric acid or by plasma treatment (for example, by corona discharge).

When implementing the present invention essentially requires that the surface of the film base of the styrene resin were subjected to hydrophilic treatment to get "https://img.russianpatents.com/chr/946.gif">lying in a given range. To obtain a film of styrene resin, a suitable applicator film for Windows or machine for paper (hereinafter in some cases referred to as applicator film for Windows), it is particularly necessary to change the degree of the hydrophilic processing of these surfaces. In the case of using the film of the styrene resin as a film for a window in the envelope or sheet, film of styrene resin should be pasted on the inner side of the bonding material (e.g., envelope), and thus the surface of the film (A’) is the deep surface of the envelope. When the surface of the film (A’) is electrostatically charged at the stage of applying the film on the window, the surface of the film (A’) attracts the bonding material due to static electricity, resulting envelope can be opened with difficulty, making it impossible to put the paper in the envelope. Because paper is placed in the envelope or include them in contact with the inner side of the bonding material, the surface of the film (A’) electrostatically charged due to charge due to friction, and in turn, the paper as such also charged electrostatic damage to the module is also charged, in the resulting paper can not be placed inside due to static electricity. In line with this, it is necessary that the surface of the film (A’) had elevated anti-static properties compared with the surface of the film (’).

On the other hand, the surface of the film (In’) must also have antistatic properties to prevent the problem of twisting of the sheets to each other due to static electricity at the stage of passing the film through a set of rollers in the applicator film for Windows in the envelopes. It is also necessary that the surface of the film (In’) have appropriate adhesive properties relative to the bonding material. To meet these objectives, the surface of the film (In’) should have a lower antistatic properties by a specific value than the surface of the film (A’), and to ensure adhesion of the adhesive. It is therefore necessary in carrying out the invention to regulate the ratio of the surface tension () on the surface (A) of the film base to the surface tension () on the other surface (In) film base (i.e./

When the value of the surface tension is less than 1,15, it is impossible to control the masses coatings of the modifier composition on the surfaces of the film (A’) and (’) depending on the tension of the winding being wound or temperature and relative humidity during storage, as in the case when the surface is not subjected to hydrophilic treatment. On the other hand, when the ratio of the surface tension exceeds 1,72, the force of separation between the sheets of film becomes extremely high, despite the modifying composition deposited on them, and thus the roll of film becomes difficult to unravel.

As described in examples 3 and 5 of JP-A-119978, it is obvious that the mass of dormancy is nosily put on these surfaces without holding their hydrophilic processing. Thus, it is better that in the case of food packaging film, the film surface (A’) and (’) were different from each other performance properties, as described above.

When the film of the styrene resin laminated with another film from the resin, as in JP-A-8-230933, the surface (In’) can be used as a surface film, which is laminated to another film. Thus, the adhesive strength can be maintained on the surface at a lower coating weight, the surface of the film (A’), superior slip resistance and antistatic properties, can regulate the onset of shear in the manufacture of bags in an automated production process.

In the bag, having a large inlet opening for filling, for example, the bananas, the surface of the film (A’) is inside, so the bag can be easily opened by the action of the antistatic properties of the surface (A’).

Similarly, the specific value of the surface tension of the main surfaces are limited to the specific limits for the following reasons, thereby facilitating the implementation of the objectives of the present invention.

Surface tension () surface of the film is based is poverhnostnogo tension falls within a given range, the modifier composition can more evenly on the core surface and the main surface of the film can be appropriately activated, so that sticking of the sheets (i.e., the phenomenon that causes the increase in the strength of stratification between the sheets) does not occur. The magnitude of the surface tension () preferably lies in the range from 430 to 580 MKN/cm, more preferably from 450 to 550 MKN/see

The magnitude of the surface tension () opposite the surface (In) film base is from 350 to 450 MKN/see When the magnitude of the surface tension is 350 microns/cm or more, the surface of the film is improved affinity for the adhesive and, thus, the achievement of the adhesive to the main surface and curing it can be quickly completed. In the result, the adhesion force between the film and the paper can be improved, and the time of adhesion can be reduced, which is particularly meets the conditions of high-speed deposition of a film on the window at a speed of 1000 sheets/minute or more. Preferably, the surface tension () was 380 MKN/cm or more.

Warningmessage the surface tension (In) film base of more than 450 microns/cm, the surface tension at the surface of (A) a film substrate becomes at least 515 MKN/cm according to the definition of the coefficient of surface tension. In this case, the roll of film can hardly be unwound, and the resulting film is almost impossible to use, especially in high-speed coating film on the Windows with a speed of 1000 sheets/minute or more. This is because the mass of the surface (In’) film is less than the mass of the surface (A’) of the film, and therefore, the force of separation between the sheets of film becomes too high due to the synergistic effect with the activated surface (A) of the film base, when surface activity surface (In) film too increases the hydrophilic processing. Preferably, the surface tension () surface (In) film base 430 MKN/cm or less. As described above, the force of separation between the sheets is increased due to the synergistic effect of the surface film (A), which is activated hydrophilic treatment, and the surface (In) film base, and in turn, the force of separation between the film and the bonding material is of Lunia (hereinafter referred to as the modifier composition), which should be applied on the surface (a) and (b) film Foundation, will be considered in more detail.

Examples of the antistatic agent include conductive fillers such as carbon black and Nickel powder, and surface-active substances with anti-static properties.

The first antistatic agents (i.e., conductive fillers) conduct static electricity due to the surface interaction between the conductive particles, while the latter antistatic agents (i.e., anti-static surface-active substances) conduct static electricity due to its hydrophilic or ionic nature. It is undesirable to use such a conductive filler, because it should be applied in large quantities to ensure that the runoff of static electricity due to surface interactions between the particles, thus worsening the transparency. Therefore, it is preferable to use the latter substances (i.e., surfactants).

Agent external slip is used to improve the lubricity. When he is on the surface, he adds lubricity or slipperiness neausa lubricating action include silicone oils, waxes and surfactants, as discussed below. As an example, silicone oils, can be called dimethylsilicone oil. Examples of waxes include softeners amide type (for example, stearic acid amide, erucic acid amide and ester softeners type (for example, butilstearat, monoglyceride of stearic acid). Examples of particles include silicon dioxide, talc and calcium carbonate. Although oil-soluble softeners (for example, silicone oils and waxes) are suitable for improving slipperiness, it is undesirable to use such softeners, because they reduce the strength of the sealing in the manufacture of bags or impair the adhesive properties of the film to the paper.

Preferred examples of the antistatic agent include surfactants having antistatic properties, as discussed below, polyoxyalkylene and simple polyoxypropyleneglycol ether of polyoxyethylene. Preferred examples of agents external slip include inorganic particles, as discussed below, and modified by a simple polyester silicones.

Modifier external resistance to sliding oackage agent.

As the preferred embodiments of the present invention can provide the following three types of modifying compositions. Namely, the first modifier composition contains a surfactant as an antistatic agent, inorganic microcapsules as agent for external slip and additional water-soluble polymer; a second modifier composition contains a surfactant as an antistatic agent, a specific modified simple polyester silicone as agent for external slip and additional water-soluble polymer; and a third modifier composition contains a specific polyoxyethylenated or simple polyoxypropyleneglycol ether of polyoxyethylene as an antistatic agent and a specific modified simple polyester silicone as agent for external slip.

In some cases, or an antistatic agent or modifier external slip also has the effect of another.

The following is the first modifier composition of the present invention.

In the first modifier composition as antistatic away surfactants, used in this composition include anionic surfactants (for example, salts of carboxylic acids, salts of sulfonic acids, sulfates, phosphates, salts of phosphonic acids), cationic surfactants (for example, salts of amines, Quaternary ammonium salts, sulfonate salt), amphoteric surfactants (for example, surface-active substances such as betaines, surfactants imidazoline type) and non-ionic surfactants (for example, a complex monoglyceride esters of fatty acids of type a polyhydric alcohol, a complex polyglycolide esters of fatty acids, complex sorbitane esters of fatty acids, esters of sucrose and fatty acids, alkanolamide fatty acid-polyethylene glycol condensed fatty acids, aliphatic alcohols, aliphatic amines, ALKYLPHENOLS, polypropylenglycol). It is preferable to use amphoteric surfactant or nonionic surfactant, because thus it is possible to achieve a stable antistatic properties. You can also use a combination of two or more of these surfactants.

Examples of inorganic MICR magnesium. Due to the effect of these inorganic microparticles can improve the lubricity of the film, but the power splitting between sheets can be reduced after winding into a roll. Such inorganic microparticles should have an internal specific surface area is preferably in the range from 0.5 to 4.0 m2/g in units of the specific surface. The preferred particle diameter is in the range of values from 1 to 7 μm, more preferably from 2 to 5 μm, in units srednecenovogo diameter particles. Mainly to use microparticles of silicon dioxide, based on the particle diameter and the internal specific surface area. Due to the presence of internal specific surface part surfactants and water-soluble polymer is embedded in microparticles, and thus strength retention surfactants can be increased, compared with the case of using only one water-soluble polymer. When the value srednecenovogo the particle diameter falls within the range of values from 1 to 7 μm, the microparticles hard fall during contact with the applicator rolls of film for Windows, and the bond strength of surfactants increases.

PRINTERA-sulfonate sodium and methylcellulose. Of them, preferred is polyvinyl alcohol from the viewpoint of water solubility and adhesion forces.

Also preferably, the polyvinyl alcohol had a degree of saponification of from 40 to 99 mol.%, more predpochtitelno 60 to 95 mol.%. When the degree of saponification falls within a given range, you can easily prepare an aqueous solution of polyvinyl alcohol, and the strength of the film is not particularly limited. As a result, it is not necessary to be afraid of spots on the rollers when the film comes into contact with the rollers. Molecular weight water-soluble polymer generally ranges from 100 to 15000, preferably from 200 to 5000. The use of water-soluble polymer facilitates uniform deposition of the modifying composition, in addition to the effects that will be discussed below.

To meet the requirements of processing film according to the invention using a high-speed printer, machines for making bags or high-speed film applicator for Windows, the first modifier composition contains a surfactant, as described above, but also water-soluble polymer and inorganic microparticles. Adding a water-soluble polymer and neobratim it is possible to prevent the formation of stains on the rollers of various machines. In addition, it is possible to prevent the precipitation of inorganic microparticles from the surface of the film due to the synergistic effect of water-soluble polymer and inorganic microparticles.

In the first modifier composition most suitable mixing ratio by weight of (a) a surfactant, (b) water-soluble polymer and (C) inorganic microparticles (i.e., (a):(b):(C)) is 1:0.03 to 3:0,01 to 1,25.

When the proportion of the composition of water-soluble polymer is from 0.03 to 3, it gives high bond strength of the surface-active substance and, thus, surfactant hardly peeled from the surface of the film. In this case, the effect of surfactants can be easily realized, and thus improved antistatic properties.

When the proportion of the inorganic microparticles in the composition is from 0.01 to 1.25, the effect of coupling of surface-active substances can be achieved due to the synergistic action of water-soluble polymer and inorganic particles and, thus, the inorganic microparticles with difficulty falling out with the film surface.

The desired level of antistatic properties or slipperiness (tiy film, for example, as a food packaging film and processing in bags with automatic filling their food automatic filling can be carried out without Vozniknovenie shift in the manufacture of bags by regulating the ratio of high-speed dynamic friction between the film and the metal from 0.15 to 0.57 and regulation of the half-period of the electrostatic attenuation (20°C, relative humidity of 25%) to 300 seconds or less.

In the case of using the film of the present invention, for example, for application to Windows, high-speed processing (1000 sheets/minute or more) can be carried out without any problems such as wrinkling, due to regulation of high-speed dynamic coefficient of friction between the film and the metal in the range from 0.15 to 0/35, regulirovaniya bottom half electrostatic attenuation (20°C, relative humidity 25% to 90 seconds or less.

To satisfy these requirements, the modifiers must be applied on the surface of the film bases, respectively, in the following amounts by weight: (a) from 2.0 to 15 mg/m2(preferably from 3 to 12 mg/m2), (b) from 0.5 to 6 mg/m2(preferably from 0.5 to 4 mg/is g/m2). The coating weight of the surface-active substance from 2 to 15 mg/m2sufficient to achieve the antistatic effect. In addition, in this case, the inorganic microparticles are not immersed in the coating layer, and accordingly covered with a surface-active substance. Therefore, when processing on the applicator film for Windows thus obtained film undergoes a small jam or the positioning error caused by static electricity.

Water-soluble polymer is used together with surface-active substance, in order to keep the inorganic particles on the film surface. Since only one surface-active substance may have only a minor effect retention of inorganic microparticles, then add a water-soluble polymer as a so-called adhesion promoter to increase the force of adhesion.

To implement this effect, the coating weight of the water-soluble polymer is preferably a value ranging from 0.5 to 6 mg/m2. When the coating weight of the water-soluble polymer falls within a given range of values, can be achieved a sufficient effect retention of inorganic microcastle film. In addition, in this case is not particularly limited antistatic properties of surface-active substances, and slip resistance does not deteriorate due to excessively increasing adhesion on the surface of the film.

When the coating weight of the inorganic microparticles is from 0.2 to 2.5 mg/m2sufficient number of inorganic microparticles may be dispersed with the formation of the protrusions, thus providing the effect of improving the slipperiness. In addition, a small inorganic particles fall out of the film and therefore in this case, the film is covered with a small amount of scratches.

Next, we consider the second modifier composition. The second modifier composition comprises a modified simple polyester silicone, surfactant and water-soluble polymer. One of the features of this combination is that the sliding resistance can be improved without using any inorganic microparticles, and thus, eliminates the need for measures to prevent deposition of inorganic microparticles of the film. According to the invention presents the modifier, ensuring the achievement of slipperiness without what atom, revealed as the second modifier composition.

Modified simple polyester silicone, disclosed in the present invention has a structure represented by the following formula (1), in which the methyl group of dimethylsilicone partially modified polyoxyethylene and polyoxypropylene groups.

In the formula (1) R1means a hydrogen atom or a lower alkyl group containing from 1 to 4 carbon atoms; m represents an integer from 0 to 80, and n represents an integer from 1 to 30, provided that m+n represents an integer from 1 to 100 and the ratio n/(n+m) is from 0.1 to 1.0; the symbol a represents an integer from 5 to 30 and b is an integer from 0 to 30, provided that a+b is an integer from 5 to 60, and the ratio a:b is from 100:0 to 100:50.

In a modified simple polyester silicone of formula (1) also preferably, m is meant an integer from 1 to 30; the ratio of n/(n+m) is from 0.3 to 1.0; a+b is from 5 to 15; and the ratio a:and is 100:0.

In the case when the modifier is used only one modified simple polyester silicone to achieve a satisfactory antistatic properties and slipperiness, weight nonesense-active substances. Due to the low surface tension of silicone molecules there is a tendency to an excessive increase in vodootlivnye on the film surface. So sometimes the film shows poor adhesion to the bonding material, and therefore there is a positioning error when gluing it to the paper using a film applicator for Windows.

When using films of styrene resin is often observed that the film coated with the modifiers (e.g., surfactants) are sent for recycling and reuse. Because the modified simple polyester silicone is incompatible with styrene resins, films containing modified simple polyester silicone in large quantities, whiten and reduce transparency, which makes recycling of these films.

The second modifier composition modified by a simple polyester silicone used in conjunction with surface-active substance, and therefore the content of the modified simple polyester silicone can be reduced. Surface-active agent used in this case may be any selected from among anionic, cationic and non-ionic surface-active is rastvorimy polymer was fixed on the surface of the film base and detained surfactant. Due to such structure of the surface-active substance can be uniformly distributed on the surface of the film substrate, thereby providing a stable antistatic properties.

The second modifier composition, the preferred mass ratio of (a) a surfactant, (b) water-soluble polymer and (C) modified simple polyester silicone (i.e., (a):(b):(C)) is 1:0,03 2,0:0.1 to 5.7. When the composition falls within the specified range, the resulting film is appropriately processed using, for example, the applicator film for Windows.

Preferably, the composition contains from 10 to 85 wt.% modified simple polyester silicone, from 15 to 90 wt.% surfactants and from 3 to 30 wt.% water-soluble polymer.

By adjusting the content of the modified simple polyester silicone to 10 wt.% or more, you can get the appropriate property slipperiness, sufficient slip resistance and anti-adhesion effect (reduction in force separation). As a result, the film has virtually no positioning error or twisting at the stage, for example, deposition of a film on the Windows. In addition, captive

By adjusting the content of the surfactant to 15 wt.% or more, the film can give a good antistatic properties, particularly under lower relative humidity (20°C, relative humidity 20%). As a result, the film has almost no sticking or a positioning error at the stage of applying the film on the window of the envelope. In addition, this film is excellent from the point of view of friction between the sheets and anti-adhesive properties and, therefore, hardly winded at each other when applying the film on the window of the envelope. In addition, it shows the corresponding effect of the separation between the sheets of film that provides the unwinding of the roll of film.

Additionally, by adjusting the content of water-soluble polymer is from 3 to 30 wt.%, you can provide a uniform dispersion of surface-active substances, even if modified by a simple polyester silicone has a low surface tension. Thus, the surface-active substance can be uniformly fixed on the surface of the film base. This seemingly is determined by the affinity of the water-soluble polymer and a surfactant.

The resulting film is less than l the OS in terms of slipperiness and antistatic properties.

From the point of view of balance of properties, as described above, it is also preferred that the content of the modified simple polyester, silicone surfactants and water-soluble polymer was kept within correspondingly from 40 to 60 wt.%, from 60 to 40 wt.% and from 5 to 25 wt.%/

The coating weight of the modifier composition on the surface of the film base is preferably from 2 to 30 mg/m2more preferably from 2 to 15 mg/m2. When the coating weight falls within this range, the performance of antistatic properties and slipperiness be sufficient, and the film gives a small positioning error when using, for example, the applicator film for Windows. In addition, when the recycling transparency and anti-adhesive properties of the film does not deteriorate.

Next considered the third modifier composition. The third modifier composition comprises a modified simple polyester silicone represented by formula (1) as described above, polyoxyethylenated, represented by the following formula (2), or polyoxyethylene-polyoxypropyleneglycol, represented by the following formula (3).

In the formula (2) Restablet an integer from 1 to 30.

The compound represented by formula (3) has a molecular weight of from 1,500 to 15,000 and the total mass of the repeating element d and duplicate link f is from 40 to 95 wt.% the whole molecule.

Unlike the first and second modifying compositions third modifier composition does not contain inorganic particles and, thus, no need for measures to prevent deposition of inorganic microparticles of the film. In addition, the third modifier composition is pre-emptive in that it is possible to prepare a cost-efficient way, because it does not contain any water-soluble polymer.

As described above, there are different types of surfactants. When using a modified simple polyester silicone without adding any water-soluble polymer, the used surfactant represented by the formula (2).

When modified by a simple polyester silicone used in conjunction with Amida fatty acids, as disclosed in JP-A-10-119978, lubricity and anti-adhesion effect, characteristic for the modified silicone inhibited. In addition, in this case also became the e can be achieved.

In the third modifier composition, there is no need to add any water-soluble polymer to improve technological properties. This is because the modified simple polyester silicone is highly compatible with polyoxyethyleneglycol and, thus, the modifier composition can be uniformly applied on the surface of the film base without adding any water-soluble polymer.

Polyoxyethylenated formula (2), unveiled in the present invention, can be obtained by reaction of a merger between aliphatic amine containing from 8 to 22 carbon atoms and ethylene oxide, or by the dehydration reaction between aliphatic amine and polyoxyethylene. Of them, mainly to use aliphatic amine containing from 8 to 18 carbon atoms, in the viewpoint of antistatic properties and slipperiness of the film and affinity to the modified simple polyester silicone. For example, there can be used aliphatic amines, such as laurylamine, militiamen or auterinen either separately or in a mixture with unsaturated aliphatic amine(s), such as oleylamine (for example, higher aliphatic amines, obtained the formula (2), in which x denotes an integer from 1 to 15 and y denotes an integer from 1 to 15.

Polyoxyethylene-polyoxypropyleneglycol formula (3), unveiled in the present invention is high molecular weight non-ionic surfactant, containing a hydrophilic polyoxyethylene group as a hydrophobic group polyoxypropylene. Hydrophilic/hydrophobic balance can be adjusted depending on the values of a, b and C in the formula.

In the invention, the content of recurring units (d+f) is from 40 to 95 wt.%, preferably from 50 to 85 wt.% from the whole molecule from the viewpoint of antistatic properties, compatibility with modified simple polyester silicone and slipperiness.

Most suitable for the composition ratio (a) modified by a simple polyester silicone to (b) polyoxyalkylene or polyoxyethylene-polyoxypropyleneglycol (i.e., (a):(b)) is from 1:0.1 to 9.0 in. In the case where the film is intended for mechanical processing, such as deposition of a film on the Windows of envelopes, it is advisable to use the ratio specified below.

Namely, it is advisable to third modifier composition contains from 85 to 100 wt.% modified simple p is huirua the composition at this level, you can obtain the appropriate lubricity sufficient slip resistance and anti-adhesion effect (reduction in force separation). As a result, this film has almost no positioning error or twisting at the stage, for example, deposition of a film on the Windows. In addition, the adhesion of the film to the bonding material is not inhibited and the film does not lose transparency with the process of recycling.

By adjusting the content of polyoxyalkylene or polyoxyethylene-polyoxypropyleneglycol to 15 wt.% or more, the film can give a good antistatic properties, particularly under lower relative humidity (20°C, relative humidity 20%). As a result, the film is practically no sticky or a positioning error at the stage of deposition of a film on the Windows of the envelopes. By adjusting its content to 90 wt.% or less, it is possible to improve the friction between the sheets of film and adhesive properties and, consequently, the film will not be screwed to each other when applying the film on the Windows of the envelopes. In addition, it shows the corresponding effect of the separation between the sheets of film that provides a stable unwinding of the roll of film.

In system applications, cognition-polyoxypropyleneglycol, it is difficult to meet all the requirements for antistatic properties, slipping, anti-adhesive effect and transparency. Using these components together, facilitates uniform distribution of the modified simple polyester silicone on the film surface, and the lubricity and antistatic properties synergistically improved. At the same time, it is possible to implement an anti-adhesive effect.

From the point of view of balance of properties, as described above, is more preferable to adjust the content of the modified simple polyester silicone and the content of the polyoxyethylene-alkylamine or polyoxyethylene-polyoxypropyleneglycol level respectively from 40 to 60 wt.% and from 60 to 40 wt.%.

The modifying composition is applied on each side of the film base number of from 2 to 30 mg/m2preferably from 2 to 15 mg/m2. When the dose of application falls within the specified range, the antistatic properties are regulated at the appropriate level, and the positioning error does not occur in the manufacture of bags or the deposition of films on the Windows of the envelopes. In addition, in this case, are provided with appropriate adhesive properties of the film to the paper, and transparency, antiage the s modifier composition of the present invention.

The ratio of each modifier compositions disclosed in the invention, and the coating weight on the surface of the film base described above. In the case when the film according to the invention is intended for mechanical processing, in particular, the coating film on the Windows of envelopes, it is recommended that the total mass of coating of the modifier composition on the surface of the films (A’) and (’) were adjusted accordingly in these ranges, as discussed in the description below.

Although antistatic properties and protivoprilipajushchie properties are improved with the increase in coating weight of modifier composition, for the following reasons it is preferable that the mass of the coating film window envelopes were limited. More specifically, it is advisable that the coating weight of the modifier composition on the surface of the film (A’) lies in the range from 4.5 to 30 mg/m2while the coating weight of the modifier composition on the surface of the film (In’)lying in the range from 2.0 to 15 mg/m2.

When the mass of the coating on the film surface (A’) falls within the above-defined range, the antistatic properties are sufficient, if this film does not stabilisations properties are sufficient, and the time of adhesion of the film to the paper is reduced. This is because by using the modifier composition, it is possible to solve the problem of preventing the achievement of the adhesive surfaces of the film base as described above.

The film according to the invention which has the above composition has the following physical properties when using any modifier composition, subject to compliance with requirements composition and total mass of the coating as defined above.

As for the electrostatic properties on the surface of each film surface (A’) of the film has a half-life decay (JIS L 1094: measured at 20°C, relative humidity 20%) 90 seconds or less (more preferably 60 seconds or less), whereas the surface (In’) of the film has a half-life decay of 300 seconds or less. When the half-time of decay on the surface (A’) is adjusted to the specified level, the paper easily invest in envelopes and sheets of film are not twisted on each other, for example, in a machine for feeding papers into envelopes.

The following details the roughness of the surfaces of the film base (a) and (B).

When carrying out the invention it is recommended that the ETP surface roughness") lying within the specified range. Parameter surface roughness is measured using the analyzer forms the surface (SAS-2010 production Meishin Koki K. K.), highlighting the curves of roughness on certain lines on the surface of the film base before applying the modifier, dividing the area of the part bounded by the curve roughness length of 1 mm and a Central line, with the length measurement (for example, 1 mm), which allows to determine the average deviation in each of the longitudinal and transverse directions, and then to calculate the longitudinal and transverse values.

In a preferred embodiment of the present invention, the parameter of the surface roughness of the film base is preferably a value in the range from 0.4 to 2.2 μm, more preferably from 0.42 to 2.0 μm.

According to the invention the surface properties of the film are improved, and the film lend slipperiness, causing the modifying composition comprising inorganic microparticles with a particle diameter falling within the specified range (i.e., the first modifier composition) to obtain the weight of the cover, lying in the specified range of values, or damaging modified simple polyester silicone obtaining mass coverage, minutest on the surface of the film base as such affects the efficiency of the process of high-speed mechanical processing.

That is, when the surface roughness is 0.4 to 2.2 μm, the film surface becomes smooth and as a result suffers from a small friction scratches during high-speed operation on metal rollers. In this case, set the appropriate value of slipperiness. As a result, on the film are not formed of folds or not an error occurs positioning even, for example, on the vacuum drum, where the adhesion of the film with great speed in the process of applying the film on the Windows of envelopes.

In General, the sliding resistance is evaluated on the basis of the coefficient of dynamic friction. However, measuring less than 10 m/min, which is widely used in this field, it is not enough to assess the slipperiness during high-speed operation when mechanical processing using, for example, machines for making bags or high-speed film applicator for Windows. Therefore, in the present invention as a standard factor used high-speed dynamic friction in the range from 0.1 to 0.35 (between the film and the metal mirror surface stainless steel) that is defined at a high speed of 30 m/min). P is to be when the surface roughness exceeds a 2.2 μm. When the film according to the invention is used in the coating film on the Windows of envelopes, it is preferable that the high-speed dynamic coefficient of friction of the films was in the range of values, as defined above. It is also preferred that both surfaces of the film had a high-speed dynamic coefficients of friction within the specified range. However, when the film is intended for use for other purposes, this factor is optional to run.

In a machine for manufacturing bags with automatic feed material, as described above, without any complications can be used, for example, a film having a high-speed dynamic coefficient of friction of 0.15 to 0.57.

Parameter surface roughness can be adjusted within the above range by adding appropriately in the composition of the resin modified rubber polystyrene resin which is a styrene resin. In this case, it is preferable to add from about 3 to 24 wt.% modified rubber, polystyrene resin, although its content changes depending on the diameter of the rubber particles is provided which can be controlled by adding components, dispersible in the form of particles in the modified rubber polystyrene resin, for example, block copolymers of aromatic winroulettebot/conjugate diene, or organic or inorganic particles other than the particle styrene resin.

In the case of microparticles, it is preferable to add from about 1 to 10 wt.% microparticles, although the content varies depending on the diameter and component resin microparticles.

The diameter of the microparticles preferably ranges from 0.5 to 10 μm. When the content of the microparticles is in the above range, the particles are evenly distributed throughout the surface of the film with the formation of a slight convexity-concavity, thus providing a coefficient of dynamic friction at the desired level. When the diameter of the microparticles is in the above range, is achieved corresponding to the convexity-concavity.

When biaxial stretching such film composition, as described above, the granular components in the film affect the shape of the film surface and thus contribute to the formation of relatively small convexity-concavity.

Further detail is examined time adhesion NAII discussed in detail below). The applicator film window film is glued to the paper of the envelope almost simultaneously with the application of the adhesive on the film. Bonding exercise, feeding the film into a metal cylinder when rotating at high speed, carrying the envelope paper feed tangentially of the cylinder and providing, thus, the contact of the film with envelope paper. At the point of contact of the film with envelope paper bonding occurs under the action of shear forces in the tangential direction of the cylinder. Accordingly, it is very important in high-speed coating film on the Windows to accelerate the achievement of the adhesive surface of the base and curing it, thereby preventing the positioning error between the film and the boundary of the window.

Although the water-based adhesive type quickly absorbed by the envelope paper and fixed it, but it takes a long time (i.e. the time of adhesion), so that the adhesive has reached the surface of the film base, since the film surface is anti-static agent. Preferably, the time of the adhesion surface of the film base to the paper was no more than 30 seconds. When the time of adhesion is within the specified range, the adhesive can dostatochno practically does not occur, that retains commercial value of the envelope. Also preferably, the time of adhesion does not exceed 25 seconds, more preferably less than 20 seconds. Also preferably, the difference between the time of adhesion of the film surface (A’), bearing a deposited composition to the paper and the time of adhesion of the opposite surface of the film (In’) for the paper was 1.0 second or more, and the time of adhesion of the film surface (In’) for the paper was no more than 30 seconds.

Further details of the production process according to the invention.

Styrene resin, which optionally contain known additives (e.g., depletability, antioxidant, plasticizer) is melted and forced through an extruder, and then pull chirillo-drying method or a method of blowing with obtaining a film of a certain thickness.

In the case of chirillo-drying method, you can choose either simultaneous biaxial stretching or sequential biaxial stretching. It is desirable that the stretching was carried out at a temperature higher by the value of from 20 to 40°C. than the softening temperature of the styrene resin by Vika.

If the hood is carried out at a temperature below that h is such rigidity. As a result, the sheet film can hardly apply to a guide roller machine for manufacturing bags with automatic filling, which causes the impossibility of sealing. At the stage of applying the film on the window film cannot follow the movement envelope paper, and the result is the positioning error. When the temperature of the exhaust exceeds the upper limit (i.e., softening temperature by Vika +40°C), the obtained film becomes less rigid. As a result, the film cannot follow the movement of the guide roller machine for manufacturing bags with automatic filling, which causes the impossibility of sealing. In this case, the film formation of wrinkles in the process of applying the film on the Windows.

In a higher temperature range hoods percentage of extraction in both the longitudinal and transverse directions is from 2 to 17. In order to facilitate the stretching of the film, giving it orientational properties and attaining uniform drawing, it is also preferred that the percentage extraction ranged from 4 to 12. It is also desirable that the draw ratio of (percentage of extraction in the longitudinal direction/percentage hoods in the transverse direction) lay within the range of recovey the camera so to hood began at temperatures above, at 30-90°C. than the softening temperature at the Vic, and the temperature in the center of the bubble was higher at 20-60°C. than the softening temperature for Vika. To increase the strength of the film by giving it orientational properties and to achieve uniform drawing, it is also preferred that the percentage extraction ranged from 4 to 12.

The film thickness, extruded according to the invention, is not specifically limited. For use in food packaging film thickness is from 10 to 60 μm, preferably from 15 to 50 μm. Film having a thickness less than 10 μm, has only insufficient strength and therefore prone to tearing when driving in food. On the other hand, a film having a thickness of greater than 60 microns, characterized by excessively high rigidity and often causes a violation of encapsulation. When using film for application to a window envelopes, it is preferable that the film thickness ranged from 15 to 50 μm. Film having a thickness of less than 15 microns, sometimes the paper jams in the process of applying the film on the Windows, due to their small thickness and low stiffness. When the film thickness exceeds 50 μm, it is sometimes the error positiondata film. More preferably, the film thickness ranged from 20 to 40 microns.

One side of the film base, stretching up above a certain thickness, is subjected to hydrophilic treatment.

The hydrophilic treatment can be performed using a well known method, such as chemical method involving the use of concentrated sulfuric acid or concentrated nitric acid, or a method of corona discharge. When carrying out the invention are eligible to use corona discharge, when both surfaces can be processed one after another at high speed. When the hydrophilic treatment, the concentration of concentrated sulfuric acid or concentrated nitric acid or output corona discharge is regulated in such a way as to obtain a certain ratio of the surface tension on the surface of the film base (A) to the surface tension on the other surface of the film base (In). In the case of using the chemical method can be achieved by the surface tension of 480 or 610 MKN/cm, for example, immersion of the film base is heated to 30°C nitric acid (purity: 96%) respectively for 10 or 60 seconds is achieved with the use of four-pointed electrode, when adjust the distance between the film substrate and the electrode at the level of 1 mm, and then subjected to a surface of the film base (a) and the surface of the film base (In) action of corona discharge, respectively, at 4 and 2 W/m2/min.

Then apply the modifier composition diluted with a solvent (such as water, isopropyl alcohol), a well-known method using, for example, rolling machines for coating, spraying machine for coating or with ejector scraper. After evaporation of the solvent the opposite side, which was covered with a modifying composition is subjected to hydrophilic treatment, and then the film is wound into a roll. In another embodiment, both surfaces of the film base can be previously subjected to hydrophilic treatment. It is advisable to vaporize the solvent in a stream of hot air at a temperature of from 70 to 140°C.

At the stage of winding in the coil tension winding is preferably from 2 to 10 kg-m, as in common cases. When wound into a roll, the surface of the film base (A) is in contact with the surface of the film base (In), and thus of the modifying composition is deposited on poetry transfer). When the film roll is unwound and used, the film surface is coated with (A’) and (’) can thus be opened. External pressure that must be applied to the roll position, is preferably from 0.05 to 100 kg/cm2. After storage at ordinary temperature for 4 hours or more before using the modifier composition can be transferred to the surface (C) in the desired ratio.

If the external pressure to maintain the above range, no problems (for example, the appearance of waviness) does not occur in any form of rolls or voltage winding that provides a uniform transfer.

More specifically, the film coated with the modifier composition, wound into a roll and stored over a certain period of time. Then cut it into pieces of appropriate width and length, depending on the objectives pursued after the reverse winding into a roll. Then, this back wound film is kept for a certain period of time before use. That is, the transfer is carried out on the inner side is covered with a film roll under the appropriate pressure of the winding. At a later stage reverse winding in the coil side, on this side the same way.

Below is a more detailed description of the invention with reference to the following examples and comparative examples.

First, discusses the evaluation methods used in examples and comparative examples.

(1) Evaluation of the surface tension

The surface tension is determined in accordance with ASTM D 2578.

After rinsing modifier applied to the surface of the film, for example, pure water or isopropyl alcohol to the surface of the film is sufficiently washed with pure water and dried, and then determine the surface tension in accordance with ASTM D 2578.

(2) measurement of the mass coverage of the modifying composition

Film of a styrene resin, is wound into a roll, stored at 25°C and 60% relative humidity for 2 weeks. Then roll unwind and measure the amount of the modifying composition deposited on the thus obtained film.

The coating weight is determined by extraction of the modifying composition applied to the surface (approximately 0.5 m2) film for evaluation, isopropyl alcohol, weighing extracted residue and the subsequent calculation of the weight of the modifier composition applied per unit area of the film (mg/m2).

(3) Ocenka in accordance with JIS L 1094 (20°C, relative humidity 20%). The measurement is performed using static goniometer (Model H-0110, production Shishido Denki K. K.) with an applied voltage of 10 kV and the distance between the electrode and the sample 20 mm (4) evaluation of the time of adhesion between the film and envelope paper

The time of adhesion is measured by the following method.

(i) From the film of the styrene resin cut out a piece (20 mm width, 50 mm length) and fixed with adhesive tape on the glass plate automatic desktop machine for coating.

(ii) From envelope paper cut out a piece (30 mm wide, 100 mm long) and one side length is placed under the film of the styrene resin described above in paragraph(i).

(iii) Film of the styrene resin is placed on top of envelope paper. Then put 3 grams of adhesive between the film of the styrene resin and envelope paper with one end overlapping the sides. Then immediately include Mayerbar weight of 70 g, so is the contact film of the styrene resin with envelope paper over the adhesive.

(iv) At the end of the contact film of the styrene resin and envelope paper left on for 1 second, and then the paper pull horizontally with a force of 200 Gauss.

(v) In the case when the envelope paper does not change its the Yu-keeping for 1 second, and then pulling out to repeat until the film and the paper does not reach the state of "glued". Total aging time to achieve the status of "bonding" is considered the time of adhesion.

(vi) in Addition to the envelope paper is used widely used a Kraft papers (basic weight: 75,5 g) manufactured by Oji Paper Co., Ltd. As the adhesive, use a water-based adhesive containing an ethylene/vinyl acetate copolymer as a main component (Saivinoru FB-408, production Saiden Depending K. K.). Samples showing the time of adhesion on the film surface (In’) 20 seconds or less, from 21 to 30 seconds, and up to 30 seconds, evaluate, respectively, And X.

(5) Evaluation applicator film for Windows

Using a film applicator for Windows(HELIOS Model 202 production WINKEL+DUNNEBIER) pieces of film of the styrene resin (54 mm wide, 94 mm in length) put on envelopes with Windows (5090 mm) with a speed of 1,300 sheets/minute with obtaining 21,000 envelopes with a window. Received envelopes with a window estimate for the following positions. (a) the estimated error of the positioning

From the above 21,000 envelopes, covered with foil window is randomly selected 50 samples from a number to the given envelope from 1900 to 2000,... 50 samples randomly selected from envelopes with 19000 nd 20,000 nd, choosing thus a total of 1000 samples. Samples showing shifts in the positioning of less than 0.5 mm, from 0.5 to 1.0 mm and more than 1 mm, indicate respectively 1, 0.5 and 0. Then consider the total number of marked envelopes in packs, each of which contains 50 samples, and tutus, showing the total number of marked envelopes 50, from 48.0 to 49.5 from 46,5 to 48,0 and less than 46, denoted respectively asOh,and x

(b) assessing the winding among sheets

In the process of applying the film on the Windows in 20,000 envelopes believe the number of cases of torsion of the sheets to each other. Samples with the number of twisting About, 1, 2, and 3 or more evaluated respectively asOh,and x

(c) Evaluating caminemos

Randomly choose 100 envelopes per 1000 envelopes with Windows, coated film. When neither one of 100 envelopes no folds, samples, denoted as. When 5 envelopes or less have some jam, samples, denoted as O. When the formation of folds observed in significantly more silt is found with high frequency, thus causing problems in practical use of such envelopes, the samples denoted as X.

(d) Resistance to scratching

Immediately before completion of the deposition film on the Windows randomly select 10 envelopes 1000 envelopes. Then measure the turbidity value (average of the values of turbidity on both sides 10 envelopes) to determine the magnitude of turbidity in the calculation of the value of the turbidity of the film before applying the window (which is determined by cutting 30 pieces of film for measurement of turbidity of arbitrary sections of the film (20 m) before entering the applicator film for Windows measuring units turbidity groups, each of 10 pieces, and then calculating the average of these three values of turbidity). Samples showing an increase of less than 1%, from 1 to 1.5%, from 1.5 to 2.5% and 2.5% or more, mean respectivelyOh,and x

The value of turbidity is measured in accordance with ASTM D-1003.

(6) Average of Central line parameter surface roughness

Using the analyzer forms the surface (SAS-2010 production Meishin Koki K. K.), highlight the curves of roughness on certain lines on the surface the Central line, divide the line segments of specified length (i.e., 1 mm) for 3 arbitrary parts, each in the longitudinal and transverse directions, to determine thus the average deviation. Namely, get the average value in each of the longitudinal and transverse directions. They calculate with accuracy to the second significant digit after the decimal point.

(7) the Coefficient of high-speed dynamic friction between the film and metal

The high-speed dynamic coefficient of friction is measured using a device for measuring the coefficient of high-speed friction (Model AB-410 production Tester Sangyo K. K.) on the mirror cylinder of stainless steel at a speed of 30 m/minute. The measurement is performed with the accuracy up to the second significant digit after the decimal point.

(8) Transparency

The film of the styrene resin coated with the modifying composition is finely pulverized, melted at 200°C and ekstragiruyut obtaining flakes. The resulting flakes melted at 200°C for 1 minute on a hot press and cooled, resulting in getting a plate from the resin of a thickness of 3 mm, Then measure the amount of turbidity records in accordance with ASTM-D1003. Using as a standard the amount of turbidity records from the resin obtained from the stumps on the difference in the values of turbidity.

: deviation from standard values of turbidity1,0% (good transparency).

About: 1,0%<a deviation from the standard value of turbidity2,0% (a relatively good transparency).

size : 2.0%<a deviation from the standard value of turbidity3,0% (relatively low transparency).

X: deviation from standard values of turbidity >3,0% (poor transparency).

(9) anti-Adhesive properties

Samples of the film (width: 70 mm) impose on each other and kept under a load of 50 kg/cm2at 50°C at a relative humidity of 85% for 15 hours. Then measure the load at separation of the contacting surfaces and thus evaluate the adhesive properties according to the following criteria.

: load bundle10 g (good anti-adhesive properties).

A: 10 g < load bundle15 g of (relatively good anti-adhesive properties).

: 15 g < load bundle30 g of (relatively poor adhesive properties).

X: load bundle >3 the ASTM D 1525.

(11) Evaluation using a filling/packing machine

The laminated film consisting of a film of a styrene resin and EVA are in accordance with the method of JP-A-8-230933. High-speed horizontal axis pillow packing machine (Super Wrapper Model S-5000JBX, production Omori Kikai Kogyo K. K.) film processed into bags (150 mm wide, 60 mm high, 250 mm length) at a rate of 100 bags/min with automatic loading them raw shitake[shiitake) (100 g/bag).

The shift between the ends of the film is assessed according to the resealable portion in the direction of the length (250 mm) of each bag, and samples showing the shifts of 0.2 mm or less, from 0.2 to 0.4 mm, 0.4 to 0.6 mm and more than 0.6 mm, denoted respectively asOh,and x

Example 1 and comparative example 1

As the film of the styrene resin according to the invention using the film of the styrene resin-based compositions P2, are presented in table 1. The composition of the resin serves in uniaxial (diameter: 40 mm) extruder with venting and melted at 186°C. Then, the molten mixture ekstragiruyut through T-shaped mouthpiece in the form of a sheet, and carry out a contact sheet with cooling rollers. Then try to serialno machine, keeping the temperature as described above, and extend in the transverse direction at a temperature of exhaust 121°C, resulting in a gain film of styrene resin with a thickness of 30 μm.

This film base itself has a surface tension of 330 microns/cm on both surfaces.

This film base is exposed to corona discharge on both surfaces with obtaining values of surface tension specified in table 6. Corona discharge obtained using Model AGI-060MD (manufactured by Kasuga Denki K. K.) with an output of from 1 to 12 W/m2per minute per square electrode. In the case of treatment with an output power of 2 W/m2/minute and the distance from the film 1 mm, for example, the surface tension on the surface of the film substrate becomes equal to 400 microns/see if the processing for the output power of 4.2 W/m2/minute and the distance from the film 1 mm of the surface tension on the surface of the film substrate becomes equal to 500 MKN/see

After reaching certain values of the surface tension on the surface of the film components modifier (first song), namely, surface-active agent listed in table 2, a water-soluble polkadot weight of the coating and poured into a stainless steel container (400 l). Then these components are diluted in 50-200 times, feeding him water while stirring the contents of a three-bladed stirrer, resulting in a gain modifier composition. Modifying the composition put in a certain amount only on the surface of the film (A) on a machine with an air scraper, and then dried in a stream of hot air at 90°C. Then the film is wound into a roll when the tension coiling 8,5 kgm

As clearly shown in table 6, the adhesive mass of the modifying composition on each of both surfaces of the film base can be adjusted in an appropriate range of values, while the values of the surface tension and the relationship of surface tension are in the ranges defined in the present invention. On the other hand, extremely high surface tension leads to poor release properties, as shown in experiment No. 1 of comparative example 1. In the case when the ratio of surface tension lies outside the range defined in the invention, as in experiments 2 and 3 of comparative example 1, the adhesive mass varies from measurement to measurement on the tape, and therefore the Aubrac and receive envelopes with Windows. Table 7 presents the estimation results positioning errors of the received envelopes and winding sheets. All the samples of example 1 was evaluated as excellent, whereas the samples of experiments No. 2 and 3 and comparative example 1 show a signicant variation in the coating weight of the modifier composition and have positioning errors and twist in some places.

The example and the reference example And

The same basic film as in example 1, is subjected to hydrophilic treatment by corona discharge, to obtain the surface tension on the front surface of (A) 550 MKN/cm and the surface tension on the back surface (In) 450 MKN/Then see the same modifier as in example 1 is applied by the same method. The inoculant contains components (a-1, b-1 and C-1 respectively in amounts 78,1, 15.6 and 6.3 wt.% and the total weight of the coating, as indicated in table 8, reach, by adjusting the degree of dilution water. Then, the resulting film is dried and roll into a roll.

The resulting rolls of film processed into bags on a machine with automatic feed and use for drawing the film by using a film applicator for Windows. As a result, these films can be processed in bags n and example And show excellent performance properties. However, films in experiments No. 1 and 2 of reference example 1 undergo a twisting due to the small mass of the coating, whereas the use of film experiment No. 3 challenging time of adhesion and positioning errors due to the large total mass of coating.

Example 2 and comparative example 2

Use the same basic film as in example 1. Components of the modifier listed in tables 2, 3 and 5, are combined as in table 9, and applied to the film, so get a film containing the second modifier composition printed on them, as in example 1. Table 9 summarises the results.

As in example 2, excellent results can be obtained using the second modifier composition, while the magnitude of the surface tension and the surface tension is in the range specified in the invention ranges. On the other hand, an excessively high surface tension leads to poor anti-adhesive properties, in experiment No. 1 of comparative example 2. On the other hand, in the films of experiments No. 2 and 3 of comparative example 2, the adhesive mass varies within wide limits and as a result, the coating weight cannot be adjusted, which makes in example 1. Components of the modifier listed in tables 2, 3 and 5, are combined as in table 10, and applied to the film and get the film containing the marks of the second modifier composition as in example 1. Table 10 summarizes the results.

As in example 3, excellent results can be achieved when using a third modifier composition, while the magnitude of the surface tension and the surface tension are specified in the invention ranges. On the other hand, an excessively high surface tension leads to poor anti-adhesive properties, in experiment No. 1 of comparative example 3. On the other hand, in the films of experiments No. 2 and 3 of comparative example 2, the weight of adhesion varies widely and as a result, the coating weight cannot be adjusted, which makes these films impractical.

Example 4, comparative example 4 and reference example

When using films of compositions based on resins given in table 1, as the main film get a film thickness of 30 μm by extruding the resin through a circular slit hole of the mouthpiece axis (diameter: 40 mm) extruder with venting and extraction 5.5 times in the longitudinal direction and 6.0 RA in the center of the bubble rose from 117 to 122°C.

The resulting film is subjected to the same hydrophilic surface treatment as in example 1. Namely, one surface is exposed to corona discharge at a distance from the film 1 mm and an output power of 5.3 W/m2/min, whereas the other surface is treated at a distance from the film 1 mm and an output power of 3.3 W/m2/min with obtaining respectively the values of the surface tension 550 and 450 MKN/see Values of the surface tension disclosed in this description, define the distance between the electrode and the film at the next intensity corona discharge.

1. 350 MKN/cm at 8 W/m2/min.

2. 400 MKN/cm at 0 W/m2/min.

3. 450 MKN/cm 3 W/m2/min.

3. 460 MKN/cm at 5 W/m2/min.

4. 500 MKN/cm 2 W/m2/min.

4. 520 MKN/cm at 7 W/m2/min.

5. 550 MKN/cm 3 W/m2/min.

6. 610 MKN/cm at 8 W/m2/min.

Each of the modifying compositions listed in table 11, is applied to the surface of the substrate, having a surface tension of 550 microns/cm, the film is dried and wound into a roll, as in example 1.

These rolls of film evaluated for use in the applicator of the film for Windows. In tables 11, 12 and 13 presents received what ispolzovaniem first modifier composition in terms of regulation of surface roughness and mass of coatings in the range specified in the invention ranges, achieve excellent results on all assessments when using a film applicator for Windows and automatic filling machines.

On the other hand, the sample of experiment No. 1 of comparative example 4, which did not contain a surfactant as an antistatic agent, showed a half-period attenuation greater than 300 seconds and not reached acceptable for practical use level indicators when assessing the applicator film for Windows. Similarly, the sample of experiment No. 2 of comparative example 4, which did not contain inorganic particles as an external modifier to sliding resistance, has not reached acceptable for practical use level of performance due to an excessively high coefficient of high-speed dynamic friction.

The evaluation results of the samples of experiments 1 and 2 of reference example suggests that the samples not containing water-soluble polymer as in reference example 4, unsuitable for the deposition of films on the Windows of envelopes, but rather is applicable, for example, for food packaging because they do not show a shift in the manufacture of bags.

In samples of experiment the spine below the surface, than the lower limit for the deposition of films for window envelopes, while each of the samples of experiments 11 and 12 had a surface roughness exceeding the upper limit. Therefore, these samples have not achieved satisfactory results when assessing the possibility of their use in the applicator of the film for Windows, although these samples proved to be quite suitable for practical use as a film in food packaging.

In the samples of experiments No. 13 to 17 of example 4 for the study of high-speed dynamic coefficient of friction of each of these samples had a high-speed dynamic coefficient of friction greater than the upper limit (i.e., 0,35), preferred when applying the film, window envelopes, and therefore has not achieved satisfactory results when assessing the possibility of their use in the applicator of the film for Windows, although these samples proved to be quite suitable for use as films for packaging food products.

Example 5 and comparative example 5

When using composition-based resin P2 in table 1 as a film base, get the main film thickness of 30 μm by the same method of blowing that described in icarousel composition, presented in tables 14 and 15, is applied on the film base as described above, and the thus obtained film is evaluated on the possibility of their use in the applicator of the film for window envelopes. In tables 14 and 15 presents the results.

As table 14 shows, the film of example 5, each of which contains the second modifier composition, the resulting coating weight in the range defined in the invention range values show excellent results as when using thin film deposition on the boxes and food packaging.

On the other hand, the sample of experiment No. 1 of reference example 5 (table 15), not containing water-soluble polymer that does not achieve satisfactory results in the evaluation on the applicator film for Windows, although it is quite suitable for practical use as a film for packaging food products.

Film not containing a surfactant (for example, the sample of comparative example 1 was poor in parameter antistatic properties and thus unsuitable for practical use. Similarly, the film not containing the modified simple Polief the Institute of film on the Windows, and for food packaging.

Example 6 and comparative example 6

When using composition-based resin P2 in table 1 as a base film core film thickness of 30 μm by the same method of the bulge that described in example 4. The surface of the obtained film process, put on her floor and dried as in example 4.

The third modifier composition shown in tables 16 and 17, is applied on the film base as described above, and the thus obtained films are evaluated for use in the applicator of the film for window envelopes. In tables 16 and 17 presents the results.

As shown in the example 6, the film obtained using the third modifier compositions containing surface-active substances a-2, a-5 and a-7, each of which has antistatic properties, show excellent results when evaluated as films for window envelopes, and films for food packaging.

On the other hand, films that do not contain surfactants (for example, the sample of experiment No. 1 of comparative example 6 was poor in antistatic properties and, thus, unsuitable for practical the sample of experiment No. 1, in the samples of experiments No. 2 and 3, comparative example 6 anti-static properties are insufficient, and the film have a lower transparency, which makes it impossible to use these tapes in practice. In the films of experiments # 7 and 8 of comparative example 6 using surface-active substances a-1, a-3 and a-4. Since these surfactants are unable to ensure the achievement of the sufficient antistatic properties when mixed with the modified simple polyester silicone, these films are not suitable for use. In the film experiment No. 9 of comparative example 6 using a large number of surface-active substances with insufficient antistatic properties when mixed with the modified simple polyester silicone. Although the film shows some level of antistatic properties, its slipperiness is deteriorating and, therefore, this film is unsuitable for practical use.

In the film of the styrene resin according to the invention the magnitude of the surface tension on both surfaces of the film base and the mass coverage of the modifying composition adjust within a certain range of values. B is ocrotiti time of adhesion between the film and envelope paper and avoid positioning errors between the film and the boundaries of the window at high speed coating film on the Windows in the conditions of high-speed torsion film (i.e., 600 R/min or more).

Claims

1. Film of the styrene resin comprising a film base made of styrene resin, subjected to hydrophilic treatment, and applied to the treated surface a composition comprising at least an antistatic agent and an agent that improves the outer slide, wherein the film base is subjected to a hydrophilic treatment on both sides, and the ratio of the surface tension of the first side having a surface tension of 400 - 600 microns/cm, to the opposite side having a surface tension of 350 - 450 microns/cm, is 1,15 - 1,72, the weight of the coating composition on the opposite surface is 25 to 95 wt.% by weight of the coating composition on the first surface, and an agent that improves the outer slide, selected from the group comprising inorganic microparticles and modified simple polyester silicones.

2. Film under item 1, characterized in that the composition is deposited on both surfaces of the film substrate, further comprises a water-soluble polymer, while the antistatic agent is a surfactant, and the external agent slip - n the ti film base, additionally contains a water-soluble polymer, while the antistatic agent is a surface-active agent, and the agent of the outer slide is modified by a simple polyester silicone having a structure represented by formula (1)

in which R1means a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms;

m represents an integer of 0 to 80;

n represents an integer of 1 to 30, provided that m + n represents an integer of 1 to 100 and the ratio n/(n + m) is equal to 0.1 - 1.0;

the symbol a represents an integer of 5 to 30;

b denotes an integer of 0 to 30, provided that a + b is an integer of 5 to 60, and the ratio a:b is 100:0 to 100:50.

4. Film under item 1, characterized in that the composition is deposited on both surfaces of the film base, contains as an antistatic agent polyoxyethylenated, having a structure represented by a formula (2), or simple polyoxyethylene-polyoxypropyleneglycol ether having the structure represented by formula (3), and as an agent that improves the external slide contains a modified simple polyester silicone having a structure represented by formula (1)

m represents an integer of 0 to 80;

n represents an integer of 1 to 30, provided that m + n represents an integer of 1 to 100 and the ratio n/(n+m) is equal to 0.1 - 1.0;

the symbol a represents an integer of 5 to 30;

b represents an integer of 0 to 30, provided that a + b is an integer of 5 to 60, and the ratio a : b is 100:0 to 100:50;

in the formula (2) R2means alkyl group containing 8 to 22 carbon atoms;

x means an integer of 1 to 30;

I means an integer of 1 to 30;

in the compound represented by formula (3), the total mass of the repeating element d and duplicate link f is 40 to 95% of the entire molecule.

5. The film according to any one of paragraphs.1-4, characterized in that both surfaces of the film base have an average center line the value of the surface roughness in the range of 0.4 to 2.2 μm, measured using the analyzer firm SAS 2010.

6. Film of the styrene resin to be applied on the boxes of envelopes, comprising a film base made of styrene resin, subjected to hydrophilic treatment, and applied to the treated surface a composition comprising at least an antistatic agent and an agent external slip, wherein the film base is treated hydrophilic treatment is Noah tension 400 - 600 microns/cm, to the opposite side, with a surface ratio of 350 - 450 microns/cm, is 1,15 - 1,72, and the mass of the coating composition on the first surface is 4.5 - 30 mg/m2; the weight of the coating composition on the opposite surface of the film base is 2.0 - 15 mg/m2; the difference between the time of adhesion to paper the first surface of the film coated with the composition and the time of adhesion to the paper opposite the surface of the film coated with the composition is not less than 1 or greater, and the time of adhesion of the opposite surface to the paper coated with the composition of 30 or less, with the external agent slip selected from the group comprising inorganic microparticles and modified simple polyester silicones and anti-static agent is a surfactant.

7. A method of obtaining a film of a styrene resin comprising a hydrophilic processing both surfaces of the film base with the following application of the composition, drying and winding the film of the styrene resin, characterized in that the composition contains at least an antistatic agent and an agent that increases the external skidding pad and applying the composition carried out on one surface of the film base, after having hydrophilic processing the magnitude of the surface tension in the range 400 - 600 microns/cm, while applying the composition to the opposite surface of the film base, having a surface tension of the surface after the hydrophilic treatment in the range of 350 - 450 microns/cm, when the ratio of the surface tension of the respective parties 1,15 - 1,72, carried out after drying and winding of the film of the styrene resin in the roll by transferring the composition from one surface to the opposite surface.

8. The method according to p. 7, characterized in that the composition additionally contains a water-soluble polymer, while the antistatic agent is a surfactant, and the external agent slip - inorganic microparticles.

9. The method according to p. 7, characterized in that the composition additionally contains a water-soluble polymer, an antistatic agent is a surface-active agent and agent external slip is modified by a simple polyester silicone of formula (1)

in which R1means a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms;

m means an integer of 0 to 80;

n is ingol and means integer 5 - 30;

b denotes an integer of 0 to 30, provided that a + b is an integer of 5 to 60, and the ratio a : b is 100 : 0 to 100 : 50.

10. The method according to p. 7, characterized in that the composition as the antistatic agent used polyoxyethylenated, having a structure represented by a formula (2), or simple polyoxyethyleneglycol ether having the structure represented by formula (3), and as an agent that improves the external slide contains a modified simple polyester silicone having a structure represented by formula (1),

where in the formula (1) R1means a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms;

m means an integer of 0 to 80;

n means an integer of 1 to 30, provided that m + n represents an integer of 1 to 100 and the ratio n/(n+m) is equal to 0.1 - 1.0;

the symbol a represents an integer of 5 to 30;

b denotes an integer of 0 to 30, provided that a + b is an integer of 5 to 60, and the ratio a:b is 100:0 to 100:50;

in the formula (2) R2means alkyl group containing 8 to 22 carbon atoms;

x means an integer of 1 to 30;

I means an integer of 1 to 30;

in the compound represented by formula (3), the total mass povtoreaiusi

 

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