Stable machining composition, method of processing substrate and the fabric obtained in this way
(57) Abstract:The invention relates to the processing of non-woven materials to make them sustainable properties, in particular wetting, and can be used in medicine, veterinary science, land reclamation, agriculture. Stable processing composition as a viscosity modifier in the form of an aqueous emulsion with a viscosity of less than about 100 mPas at 25oWith contains 5-80% alkylpolyglycoside with 8-10 carbon atoms in the alkyl chain. The composition may contain a surfactant in the form of a mixture of ethoxylated hydrogenated oils and sorbitanoleat with a concentration of solids of less than 20%. The composition is applied to a substrate in the form of 5-80% water emulsion by spraying or by immersion in a bath. The material treated with this stable composition has a duration of use of at least 2 cycles when measured by testing the effluent has high wettability. 3 S. and 13 C.p. f-crystals, 7 tab., 2 Il. This application claims priority from provisional patent application U.S. 60/025621, filed September 4, 1996Background of the invention
The production of non-woven fabrics systematically expanded in ie materials with small surface density and open structure used in products for personal hygiene, such as disposable diapers, as lining fabrics, which provide dry contact with the skin, but they easily pass the fluid to the material with greater absorptive capacity, which can be non-woven materials of different composition and/or different patterns. Heavier woven materials can be made with a porous structure that allows them to apply for filtration, absorption and protection, for example, in the packaging of products, which must be sterile, including napkins or protective clothing used in medicine, veterinary medicine or industry. Heavier woven materials developed for use in land reclamation, agriculture and construction. Here are a few examples of a virtually unlimited number of examples of nonwoven materials and their applications, well-known specialists in the field of technology, it is necessary to consider that continuously new nonwovens and expanding their scope. In addition, a variety of methods and equipment for the manufacture of nonwoven materials with appropriate structure and composition that make them suitable for such applications. Primerjalna below. The present invention is in General applicable to non-woven materials, as should be obvious to experts in the field of technology, but are not limited to references or examples of specific non-woven material and which is illustrative only.It is not always possible to produce non-woven material, having all the necessary properties immediately after molding, and often have to handle non-woven material, in order to improve or modify its properties like wettability one or more liquids, the proof for one or more fluids, electrostatic characteristics, conductivity and flexibility, not to mention other characteristics. In the known processing methods such as immersing the nonwoven material in the tank for processing, coating non-woven material processing composition or spraying on it stock and print on non-woven material processing composition. Due to cost and other reasons it is often desirable to use the processing composition in a minimum amount to provide the desired effect with an acceptable degree of uniformity. It is known, for example, that the warmth on additionally echnosti nonwoven material, as well as to increase the processing cost. There is therefore a need to establish improved method of processing and/or composition for nonwoven materials that can be economically and effectively used in the treatment without adverse effect on the physical characteristics of nonwoven material with achieving the desired results.It is also known that a large part of the conventional surfactants, dispersing in water, not prone to the formation of a high content (more than 10% by weight) solids, low viscosity (less than 100 mPas), stable mixtures with water. Therefore, there is an additional need to create the processing bath, which is stable without phase separation over an extended period of time and which has a low profile viscosity at room temperature, and means for the effective treatment of surface-active substance in order to give a stable hydrophilic properties of the substrate of non-woven material.The present invention relates to stable processing composition in the form of an aqueous emulsion to increase the service life of a material having a viscosity less than about 100 mPas Pref as a viscosity modifier.According to preferred forms perform stable machining composition according to the invention additionally contains a surfactant, and the concentration of solids is at least 20 wt.%; surfactant contains a blend of ethoxylated hydrogenated oils and sorbitanoleat; the composition according to the invention additionally contains a surfactant, and the concentration of solids is less than 20 wt.%; the composition according to the invention is suitable for processing a substrate as a material; the composition according to the invention is designed to handle material for the manufacture of articles of personal hygiene.In addition, the invention relates to a method of effective and cost-efficient processing of nonwoven materials with the purpose of giving them one or more required properties, such as stable wettability, and produce superior nonwovens. This problem is solved in the method of processing a substrate containing phase deposition on a substrate in the processing composition having a viscosity of less than 100 MPa at a temperature of approximately 25oWith the processing composition contains alkylpolyglycoside chestno-active substance at a ratio of 1:1 to 1:20, respectively.According to preferred forms of execution of the method in accordance with the invention differs in that the processing means is applied using a spray means; spray means includes one or more rotating spray heads; at the stage of applying the processing composition used tub for processing and, furthermore, the method includes a stage of drying; and a processing composition is applied to both sides of the substrate; the substrate is a nonwoven fabric, and the processing composition has a concentration of solids of at least about 20 wt.% and moreover contains a blend of ethoxylated hydrogenated castor oil and sorbitanoleat.In addition, the aforementioned task is also solved by obtaining material, having a duration of use of at least 2 cycles when measured by the test flow, as described in the application, and processed by the processing composition containing alkylpolyglycoside having from 8 to 10 carbon atoms in the alkyl chain, as well as the blend of ethoxylated hydrogenated castor oil and sorbitanoleat.According to a preferred implementation of m the film.As will be shown below, the resulting treated fabric are uniformly, consistently and effectively treated with a reduced consumption of working with minimal negative consequences. In preferred compositions for treatment includes a combination of surface-active substances, which in itself is a mixture of ethoxylated hydrogenated castor oil with servicemonitor, and viscosity modifier, alkylpolyglycoside. These types of treatments nonwoven materials are used, in particular, for goods of personal hygiene, medicine and other fields, for example, wipes, protective clothing, applicators and others where it is desirable that the compositions deposited on a substrate, had a high solids content.Below the invention is explained in more detail on the example of a specific variants of its implementation with reference to the accompanying drawings, in which:
In Fig.1 shows schematically the processing method according to the invention, suitable for coating on one or both sides of a substrate of nonwoven material;
Fig.2 is a similar schematic version of the processing system.Used here, the term and threads, are intertwined, but not a regular or a certain way as knitted fabric. It also covers foam and film, which are fibrillated, provided with holes or otherwise processed to give them properties similar to tissue. Non-woven fabrics or nonwovens receive a variety of ways, such as forming from the melt spinning and combing bonding. The surface density of non-woven materials is usually expressed in grams of material per square meter, and used the diameters of the fibers is usually expressed in micrometers. Used herein, the term "microfibers" means small-diameter fiber having an average diameter of not more than 75 μm, for example, having an average diameter from about 0.5 μm to about 50 μm, particularly, microfibers may have an average diameter of from about 2 microns to about 40 microns. Another commonly used unit is the diameter of the fibers is the denier which is defined as grams per 9000 meters of fiber and which can be calculated by taking the square of the fiber diameter in square micrometers by multiplying by the density in grams per cubic centimeter and multiplying by 0,00707. A lower value denier indicates a more subtle Tr polypropylene fibers, equal to 15 μm, can be converted to denier by squaring, multiplying the result by 0,89 g/cm3and multiplying by 0,00707. Therefore, a polypropylene fiber with a diameter of 15 μm is set denier about to 1.42; (1520,890,00707=1,415). Outside the United States more generally accepted unit of measurement is "Tex", which has the dimension of grams per kilometer of fiber. Tex can be calculated as denier/9.Used here, the term "obtained by spinning fibers" ("staple fiber" refers to fibers of small diameter, which is formed by extrusion of molten thermoplastic material in the form of monofilaments from a number of fine, usually circular capillaries of a Spinneret, followed by rapid stretching, as, for example, in U.S. patent 4340563 (Appel and others), in U.S. patent 3692618 (Dorschner and others), in U.S. patent 3802817 (Matsuki and others ), in U.S. patents 3338992 and 3341394 (Kinney), in U.S. patent 3502763 (Hartmann), in U.S. patent 3502538 (Levi) and in U.S. patent 3542615 (Dobo and others ). Staple fibers are cooled and are generally not tacky when they are deposited on the receiving surface. Staple fibers are generally continuous and have average diameter of 7 microns, and more specifically between about 10 microns and, CIDP fibers, formed by the extrusion of molten thermoplastic material through a number of fine, usually circular capillaries of a Spinneret in the form molten filaments or monofilaments into converging high-speed flow of gas (e.g. air), which reduce the thickness of the monofilaments of molten thermoplastic material to reduce their diameter, which may be equal to the diameter of microfiber. After this is obtained by forming fibers are transferred to a high speed gas stream and are deposited on the receiving surface with the formation of non-woven material made of randomly arranged fibres obtained by molding from a melt. This method is disclosed, for example, in U.S. patent 3849241 (Butin). Fibres obtained by molding from a melt, are microfibers which may be continuous or with breaks and usually have an average diameter of less than 10 μm and, as a rule, are sticky in the deposition on the receiving surface.Used herein, the term "polymer" generally includes, but without limitation, homopolymers, copolymers, such as block copolymers, graft, statistical and alternating copolymers, ternary copolymers, etc. and their mixtures and the e configuration of the material. These configurations include, but without limiting them, isotactic, syndiotactic and random symmetries.Used here, the term "direction of movement when processing" refers to the length of the fabric in the direction in which it is produced. The term "cross direction when processing" refers to the width of fabric, i.e. a direction generally perpendicular to the direction of processing.Used here, the term "monocomponent" fiber refers to a fiber formed from one or more extruders using only one polymer. This is not meant to exclude fibers formed from one polymer, in which small amounts of additives introduced with the aim of staining, impart anti-static properties, lubrication, ensure hydrophilicity, etc., These additives, such as titanium dioxide for coloring, are usually present in amounts less than 5% by weight, and more typically in amounts of about 2% by weight.Used here, the term "United fiber" refers to fibers which are formed from at least two polymers extruded from separate extruders but spun together to education one No polymers differ from each other, although the United fibers can be monocomponent fibers. The polymers are essentially invariably located separate zones in the cross section of the combined fibers and stretched continuously throughout the length of the combined fibers. This combined fiber may have, for example, a structure of type "core-shell", where one polymer is surrounded by another, or structure located in a number of polymers, or a structure of type "Islands in the sea". United fibers are presented in U.S. patent 5108820 (Kaneko and others), in U.S. patent 5336552 (Streck and others ) and in U.S. patent 5382400 (pike and others) In a two-component fibers, the polymers can be present in proportions of 75/25, 50/50, 25/75, or any other desired ratio.Used here, the term "duringrecent fibers" refers to fibers which are formed from at least two polymers extruded in the form of a mixture of the same extruder. The term "mixture" is defined below. Duringrecent fibers do not have the various polymer components that are in relatively consistently located separate zones in the cross-sectional area of the fiber and the various polymers are usually not continuous on all protegerse in random places. Duringrecent fibers are also sometimes referred to mnogomillionnym fibers. Fibers of this General type are considered, for example, in U.S. patent 5108827 (gossner). Two and duringrecent fiber also discussed in the Polymer blends and composites authors: John Manson, A. and Sperling Leslie H., Plenum Pressc, 1976, division of Plenum Publishing Corporation of New York, IBSN 0-306-30831-2, S. 273-277.Used here, the term "mixture", applicable to polymers, means a mixture of two or more polymers, whereas the term "alloy" means a subclass of mixtures in which the components are not mixed, but their mutual Miscibility can be achieved. "Miscibility and immiscibility" refers to compounds having respectively positive and negative values of free energy of mixing. In addition, ensure Miscibility" means the process of modification of boundary properties of immiscible polymer blends for the manufacture of alloy.Used herein, the term "fastening the transmission of air" means a process of bonding a nonwoven material, for example non-woven material of the component fibers, in which air is sufficiently hot to melt one of the polymers forming fibers by non-woven cloth which time up to 6 C. The bond is provided by melting and re-solidification of the polymer. When fastening the transmission of air change is limited, and it usually refers to the second stage of the bonding process. Because the bond passing air requires the melting of at least one component for the formation of ties, its application is limited to webs with two components, such as non-woven materials of the component fibers or non-woven materials containing bonding fibers or powder.Used here "thermal point bonding" involves passing a fabric or a nonwoven fabric of fibers, subject to the bond between the heated roller of the calender and the support shaft. Roll calender is usually, but not always, made relief so that taken as a whole the fabric is not sealed along its entire surface. In the result, for functional or aesthetic reasons for the calender rolls have developed a variety of reliefs. One sample topography Hansen and Pennings has sharp edges, providing a bonding area of about 30% and about 31 clutch/cm2as presented in U.S. patent 3855046 (Hansen, Pennington the size of the side of each cleat is 0,965 mm, the time interval between spikes 1,778 mm, and depth provide a fastening 0,584 mm. Resulting relief provides a bonding area of approximately 29.5 per cent. Another typical point bonding relief is a sparse fastening relief Hansen and Pennings, with which the bonding area is 15%, with a square tenon is the side with the size of 0.94 mm, the interval between spikes is 2,464 mm, and the depth 0,991 mm. Another typical point bonding relief, marked as "714", has binding sites in the form of a square spikes, each spike has a side with a size 0,584 mm, the interval between spikes is of 1.575 mm, and the depth of the fastening 0,838 mm. Resulting relief provides a bonding area of about 15%. Another common relief is relief "star", which provides a bonding area of approximately 16.9 percent. The relief-star has a structure in the form of cross-directional bands or structure "ribbed corduroy", interrupted prominent stars. Other common reliefs include diamond-shaped relief with repetition of rhombuses with a small offset and relief in the form of a wire weave, looking as tips to about 30% of the area of the nonwoven laminate. As is well known in the prior art, a point bond secures the layers with each other, and gives integrity to each individual layer by bonding monofilaments and/or fibers within each layer.Used here, the term "personal care product" means diapers, training pants, absorbent underwear elements, products for use in urinary incontinence in the elderly and feminine hygiene products.Used here, the term "long wettability" or "long-wettable" means the ability to withstand at least two, and achieving benefits for at least three discharge fluid during the test on the water flow, described below.Used here, the term "hydrophilic" means that the polymer composition has a free energy surface that the polymeric material can be wetted by the water environment, i.e., the liquid medium in which water is the main component. That is, the water wets the nonwoven fabric is treated in a bath with a surface-active substance. Bath with a surface-active agent contains at least 10 wt.% a surfactant or mixture of surfactants act runoff (impact) of water and the procedure of wetting/drying is described in U.S. patent 5258221 (Meirovich and others), which is entirely included in the present invention as a reference. In a typical case, generally rectangular with dimensions of 20 cm by 38 cm sample of fibrous material, such as a nonwoven material, fixed on the upper layer of the absorbing filler consisting of polypropylene fibers of wood pulp and/or sverkhprovodyashchego material. The resulting test structure is placed in the center of the inclined surface and hold in place with a piece of adhesive tape in each corner of the structure. The angle of inclination of the surface is chosen 45oinstead of angle 30oshown in the patent. The funnel is placed on a distance of about 200 mm from the bottom or lower edge of the test patterns. The valve of the funnel is above the upper surface of the test patterns at a distance of approximately 10 mm Into the funnel to pour 100 ml of water having a temperature of 35oC. the funnel Valve open to release water over a period of time, approximately 15 C. Determine and record the amount of water (in grams), which flows down and is collected in the collection. Typically, the fibrous material is considered to have passed the revised test the flow of water if the amount of water collected in the collection, the less polar jet a lightweight (weighing, approximately 20 g/m2) non-woven material obtained by spinning and bond, the amount of harvested water should be less than 20 ml.The cycle of wetting/drying was modified by using water at room temperature (approximately 23o(C) in the amount of 500 ml instead of 1 sheet of generally rectangular pattern in the form of a porous substrate with a coating, described above, is placed in water in a quantity of 500 ml Sample incubated in water for one minute while stirring with a frequency of 15-20 min-1by means of a mechanical mixer. The sample is removed from the water and squeeze out excess liquid back into the vessel with the wash water. The sample is dried in the air in the evening and all night, or dried in an oven (blue M model OV-475A-3 firm General Signal blue island, Illinois) at a temperature of 80oC for 20 min and then subjected vidoesseanna test water flow described above. This process is repeated as many times as necessary.Test strips for tensile strength is a measurement of the disruptive force and elongation or deformation of the tissue, when subjected to unidirectional stress. This test is a modified version of the standard test method D882 CSOs plastic sheet material).To measure the peak force applied to the objectives of the present invention, in the standard procedure changes:
The speed of separation with the help of a gripping element of the test set was kept at 50 mm/min for all samples.The initial spacing between the gripping elements varied from 25.4 to 76.2 mm depending on the type tested sample. The initial interval when testing materials with tape substrate was 38.1 mm, and the initial interval when testing materials with an outer coating was 76.2 mmThe peak force was calculated by dividing the maximum load on the curve move the load in the transverse direction across the width of the sample.The results were expressed in kilograms to break and percent elongation to break. Higher values indicate more durable, more amenable to stretching the fabric. The term "load" means the maximum load or force, expressed in units of mass required to break or fracture of the specimen in a tensile test. The term "deformation" or "total energy" means the total energy when the load depending on the values of the curve lengthening, wine strength. The values of tensile strength in the capture and elongation at capture were obtained using a tissue just given width, usually 102 mm, a certain width of the clip and a constant speed of extrusion. If the sample is wider than the clamping device, the results representing the effective strength of the fibers sandwiched width, together with the additional strength contributed by the neighboring fibers in the fabric. The sample is sandwiched, for example, in the device, the Instrument model TM, available from the company by Instrument Corporation, 2500 Washington street. Canton, mA 02021, as in the device Thwing-albert model INTELLECT II available from the company Thwing-albert instruments Co., 10960 Dutton road, Philadelphia, Pennsylvania 19154, and these devices have semidesyatishestiletny long parallel clamps. These devices are fully simulate the state of stress tissue in real use.The passage of fluid depending on time. This test is referred to as ADANA 150.1-90 and includes measuring the time required for a known volume of fluid (simulated urine), is applied to the surface of the test sample of nonwoven material in contact with nilagay on the annular bracket, this attachment is placed inside the funnel. Standard absorbent pad is made of five layers of a certain filter paper (with the absorptive capacity of 482%), is placed under the funnel on the plate of acrylic glass, and the sample of non-woven material is placed on the top of the absorber. Ensuring the passage plate of acrylic glass with thickness of 25 mm and a weight of 500 g come on top of the sample, with the hole placed in the center at 5 mm below the funnel. The burette is filled with liquid, keeping the funnel is closed, then pour 10 ml funnel. After the release of liquids in quantities of 10 ml start the countdown, which cease when the liquid penetrates into the pad and it goes down on the number of electrodes, and spent time register. For each sample, this test is repeated 5 times, using the same plots at each iteration, and the value of time average.With the polymer used for the manufacture of nonwoven material according to the invention, it is also possible to mix other materials, similar to the combustion inhibitors, to improve the fire resistance and/or pigments to impart different layers of the same or different colors. You can also ispolzovaniem obtained for spinning and molding from a melt of thermoplastic polymers are well known in the art and are often referred to as internal additives. The pigment, if used, is typically present in an amount of less than 5% by weight, whereas other materials may be represented, for example, in an aggregate amount less than about 25% by weight.Fibers, which make the fabric according to the invention, can be obtained, for example, by using the processes of melt moulding or spinning, which is well known from the prior art. When implementing these processes typically use an extruder for supplying molten thermoplastic polymer to filiere, where the polymer is converted into fibers to output fibers, which can have a length of fiber staple type or greater. Then the fiber is pulled, usually pneumatically, and precipitated on a moving perforated litter or tape for the formation of non-woven fabric. As indicated above, the fibers obtained by the processes of spinning and forming from the melt, are microfibers.Manufacture of nonwoven materials from the melt in the General form discussed above and described in the references.The fabric according to the invention may be a multilayer material. An example of a multilayer material is an implementation option, in which some of the layers polucheniya, disclosed in U.S. patent 4041203 (Brock and others), in U.S. patent 5169706 (Collier and others), in U.S. patent 5540979 (John and others) and in U.S. patent 4374888 (Bosler). Such a laminate can be produced by successive deposition on the moving forming belt first spun layer of fabric, then obtained by molding from a melt layer of fabric and at least one spun layer, and then by bonding the laminate in the manner described below. Alternate layers of fabric can be manufactured separately, collect on the rollers and to unite on a separate stage of bonding. Typically, these fabrics have a surface density of from about 3.4 to 400 g/cm2or, more preferably, from about 25.4 g/cm2to about of 101.7 g/cm2.Non-woven fabric of yarns usually in the process of their production is fastened in some way to give them some structural integrity to withstand the harsh conditions further processing into a final product. The bonding can be performed in a number of ways, for example by getoperationname, hypoproteinemia, ultrasonic welding, tikovoi welding, the transmission of air and thermoception.As mentioned above, a significant Hania wetting or the ability to withstand repeated discharge of the liquid. For example, in the case of use as the lining of the diaper is highly desirable ability to keep wettability after exposure to three or more of the discharge fluid. Some available solutions for the treatment of, for example, the mixture of ethoxylated hydrogenated castor oil and sorbitanoleat (called ahaval N-62 it can be obtained from the firm IC-AI; it is also known as simply "ahaval") are supposed to ensure that the duration of use in accordance with this rule. However, the composition processing is very viscous and difficult to apply due to the high density in the case of using conventional processing methods. Conventional viscosity modifier additives can reduce the viscosity of the composition for treatment, but they have a negative impact on the duration of use of the treated fabric, as discussed below with reference to tables 3 and 4. In the framework of the invention it was found that the use of specific alkylpolyglycoside not only reduces the viscosity of this composition, but also preserves the necessary duration of use. For best results alkylpolyglycoside choose with 8-10 carbon atoms in the alkyl chain (n is about 10%, counted relative to the total weight of the composition, the mass composition with alkylpolyglycoside, which may be water, contains, for example, 40% of water. In the following table 1 shows the impact of adding glucopon 220UP in the form of a solution of 60% alkopoligamia and 40% water by weight, which can be obtained from the company Henkel Corporation (also referred to as "glucopon"), on the viscosity of the basic substance of ahaval N-62. The viscosity was determined for formulations containing 20% solids at the shear rate of 20-1using in each case viscometer Brookfield DV II+ with spindle CF-41.For solving problems according to the invention, the preferred viscosity is a viscosity less than about 100 mPas in the case of coating at room temperature in order to use conventional systems and methods of application sufficiently thick coatings, such as roller system of the EYELID, which can be obtained from the company EYELID. As is obvious to experts in the field of technology, you can use other systems, such as, for example, brush spraying devices and device for coating and printing. As shown above, the surfactant does not in itself meet the of cosida, such as glucopon 220UP, sharply reduces its viscosity.The invention is applicable for processing with reduced viscosity and using a variety of formulations, although the combination with the compositions of surface-active substances, such as the number of akovalev is highly preferred because of the prolonged resistance of such materials. However, when the indicator of duration of use is not critical, it is just important that the composition contains effective amounts of the combination of surfactants and viscosity modifier for handling the non-woven material. To establish the suitability of the composition can be verified by using a Brookfield viscometer. Preferred are those compositions which have a viscosity of about 2000 mPas or less. Specific examples include Triton X-102, alkylphenolethoxylate, surfactant, which can be obtained from the company Union carbide, Y12488 and Y12734 related to certain ethoxycarbonyl of polydimethylsiloxane, which can be obtained from the company Axis of Masil SF-19, trisiloxane with grafted polyethylene glycol, which can be obtained from the firm's pee-Pee-Gee, PEG 200, 400 and 600 relating to the series monostearate of polyethylene glycol, distearate polymers, such as polyvinyl-pyrroline, polyvinyl alcohol, acylhydrolase, carboxymethylcellulose, hydroxypropylcellulose, starch, agar-agar and other natural water-soluble polymers. Examples of the viscosity modifier include glucopon 220 or 225, both are alkylpolyglycoside with 8-10 carbon atoms in the alkyl chain and you can get them from the company Henkel Corporation. The resulting mixture may have a viscosity preferably as an emulsion, i.e., less than 100 mPas, and more desirable viscosity of less than 50 mPas in all applications.Although the present invention is applicable to a wide range of non-woven materials, it is most effective and is therefore preferred for non-woven materials that have properties that promote rapid and effective treatment. These properties include surface density, for example, from 5 to 500 g/cm2a thickness of, for example, from 0.2 to 10 mm, etc.To maximize the advantages of the present invention, it is desirable to choose non-woven material and a composition for treatment so that the composition can be applied using preferably not more than 80% water.Please refer to Fig.1, with the material. Specialists in the art should be understood that the invention is equally applicable to processing within the system or to perform separate processing stage. Non-woven material 12, for example obtained by spinning or molding from a melt nonwoven fabric, is forwarded to a processing station, comprising a rotating spray head 22 for coating one side of the nonwoven material 14. In addition, optional station 18 processing (shown in dashed lines), which may contain a rotating spray head (not shown), can be used for coating on the opposite side 23 of the nonwoven material 12, which is directed along the upper support rollers 17, 19. Each processing station receives the flow of the processing solution 30 from a reservoir (not shown). After that, if necessary, treated non-woven material can be dried, by passing through the drying drums (not shown) or other drying means, with subsequent passage under the supporting roller 25 and the winding roll or conversion to appointment. Alternative drying include drying ovens, air dryers, radiation the raised stage dive and spin. As shown, non-woven material 100 passes over the guide roller 102 in the tub 104. When this processing time is controlled by the guide rollers 106. Under compression between rollers 108 excess processing composition is removed and returned to the bath tray 109. In the drying drum 110 is removed residual moisture.It is also clear that in the way that the hydrophilic treatment by important application of surfactants of this invention can be used not only numerous surfactants to achieve improved wettability relative to aqueous solutions (e.g., urine) or to facilitate treatment of other secretions of the body (blood, menstrual fluid, faeces, and so on), but also biologically active compounds and macromolecules that can give biofunctional characteristics of the surface treatment according to this invention (e.g., antibacterial activity, regulation of smell, skin protection and so on).Further, the invention is illustrated by the following examples, which represent the invention, although other modifications obvious to a person and covered negatived is shown under their trademarks:
DOE 2210 (Dow Corning) - protivovspenivayushchie agent based on silicone
Pluronic L 101 (BASF) is a copolymer of polyethylene oxide
Mazevet 77 (BASF) - ethoxylate fatty alcohol
G109 (ICI) - ethoxylate of ester fatty acids
G1282 (ICI) - ethoxylated castor oil (or glycerides)
TL2119 (ICI) is a mixture of fatty alcohol ethoxylates of esters of fatty acids
SF19 (BASF) - ethoxylated siloxane
Y-12488 (Osi) - the ethoxylated polydimethylsiloxane
Triton X-102 - (Union nonylphenolethoxylate)
PEG400ML (henkel) Carbide - polyethylene glycol-400 monolaurate
The compositions of surfactants with low viscosity and high solids content.Well-known and commonly used numerous ways hydrophilic processing of nonwovens surface-active substances from solutions with low solids content. However, due to the high content of solvent necessary stage of drying. It is known that heat in the drying process negatively affects the mechanical properties of nonwoven materials after surface treatment (table 2). Therefore, the use of a solution with a high solids content allows swegene. Other obvious advantages of the method of processing with a high content of dry substances include lower cost structure surfactants, simplifying transportation and storage, energy savings and reduced processing costs, as well as achieving better uniformity of processing. Used here, the term "high solids content" means the concentration of dry substances, comprising at least about 10%, and achieving benefits such compositions have at least about 20% dry matter.On the other hand, the composition of the surface-active substances for processing having a higher solids content, also inherent disadvantages, such as poor rheology, the instability of the emulsion gelation and variability of processing parameters. Another problem associated with discussing the use of surface-active substances for the treatment of non-woven materials is to provide the desired duration of use or the ability to maintain the characteristics of wettability by water in case of repeated actions of solutions.Therefore, the task of this invention is threefold: 1) to create solutions for the treatment with the bottom of the dry substances and do not require (or require minimum) drying 3) to create solutions for the treatment, which give non-woven fabrics prolonged wetting.The following procedure is typical for the General way of using the compositions for treatment according to the present invention, having a high content of solids and low viscosity.Nonwoven fabric
Used roll width 35.6 cm staple fabric with a surface density of 20.3 g/cm2made of polypropylene fibers (about 2.2 denier).The composition of surfactants
In a typical case, to prepare the aqueous processing solution containing 0.075% protivovspenivayushchie substances (DOE 2210 from the company Dow Corning) and 20% by weight of the composition of the surfactants (table 3). After thorough mixing at room temperature the composition of the surfactant was injected into the processing bath, where he continued stirring at room temperature, if no special instructions (table 3).The coating process
Processing compositions of this invention comprising a surfactant and having a high solids content and low viscosity, nvsat a centrifuge for coating by wetting with one or two rotating supports, it is shown in Fig.1. The composition of the surfactant was re-injected into the reservoir installation EYELID using a gear pump, and then moved to wetting the rotors through a restrictive tube. Experimental equipment installation EYELID, used in this invention, it has six rotor, which rotates with a frequency of approximately 4500 min-1. Under the action of centrifugal force generated by rotating the rotor, the chemicals got on the nonwoven fabric in the form of small droplets.Throughput (g/min) regulated and asked the bounding tubes of different diameters, the pressure in the manifold and mud parameters (temperature and viscosity). More smooth adjustment of bandwidth can be achieved by introducing an optional needle valve in the exhaust channel manifold.Drying
All fabrics treated according to examples 1 to 43, no drying is not required.Is weight gain
The value of the increase in tissue mass were measured by nuclear magnetic resonance in solids with low resolution using pulsed spectroscopy nuclear magnetic resonance ETA can also be found in the following link "Wide line nuclear magnetic resonance in measurements of finish-on-fiber of textile products", Rodgers J. E., Spectroscopy, 9(8), 40, 1994.Practically the processing composition of the surfactants shown in examples 1 through 6. As can be seen from table 3, the fabrics of examples 1-6 were treated water emulsion with a relatively very low viscosity and high solids content, containing ahaval and glucopon in ratios from 10:1 to 20:1. It should be noted that the treated fabric did not need any further drying after the surface treatment process of the EYELID. The singularity of data obtained in examples 1-6 compared with other processing results are shown in table 3, is the duration of use provided by the processing of surface-active agent and a viscosity modifier, described here. The uniqueness of the machining part is that it simultaneously satisfies the following conditions: 1) is a stable emulsion of water with high solids content and low viscosity, applicable at room temperature; 2) does not require drying; 3) provides increased resistance processing, installed as described in the application of the test flow.Ispytanie to drain clearly confirmed that sustainable processing dstock suggest that that in itself surfactant type favela and only combination compounds that surfactants with other surfactants stand the test of duration of use. The test results on the duration of use (from testing runoff) also suggest the existence of a direct correlation between the value, weight gain and the degree of stability (or number of cycles of runoff) only for surfactant type favela and combined some compounds, such as ahaval/glucopon, ahaval/glucopon/SF 19 and ahaval/glucopon/Y 12488. This correlation, in fact, does not exist for a single surface-active substances of other types, as well as for some of the combined compositions, such as ahaval/PEG 400 ML, ahaval/TL 2119, achaval/G 2109. In the last combined structure adding a second surfactant to favela is manifested in the deterioration of the durability of the treatment.These tests ADANA for passing a fluid to provide information about the rate of supply of fluid from the treated tissue, as well as the resistance processing, when one and A 6, it is clear that, although the initial time of arrival of the fluid is approximately the same for all of the treated tissue, there is a difference in performance when the fabric is subjected to multiple exposure to liquid. For example, time of inflow of liquid to the fabric treated with the stuff Triton X-102, worse in cycles 4 and 5, whereas the characteristic favela and favela/glucopon, favela/glucopon/SF 19 less affected after 5 impacts of saline solution. Therefore, the data for the passage of fluid obtained from testing of ADANA, consistent with the data on resistance processing, and the test results coincide with the results of the test flow.Examples 44-76
The process of saturation with a low solids content
The following procedure is typical for common method when using the process of saturation at low solids content.In a typical case, to prepare the aqueous processing solution containing 0.15% of protivovspenivayushchie substances (DOE 2210 from the company Dow Corning), 0.5% hexanol and the required amount of surfactant or combination of surfactants added in ratios, the decree of the La treatment (Fig. 2). In a typical case, the fabric roll width 35.6 cm with a surface density of 20.3 g/cm2made from polypropylene staple fibers (about 2.2 denier), were subjected to surface treatment compositions as shown in table 4. The value of the weight gain was determined by measuring the percentage moisture absorption (%WPU) after saturation of the fabric and pressed between two rubber rollers. To determine the value %WPU produced weighing and calculating by the following formula:
< / BR>where Ww and Wd is the weight of wet and dry conditions, respectively, of the piece of fabric with dimensions of about 30, 48 30, 48 see, for Example, the measured value is 100% WPU for the fabric treated in the bath when the content of dry substances in the amount of 0.3%, means that is achieved by the addition of 0.3% by weight of the fabric. The weight gain is determined mainly by the concentration of chemicals in the bath, the speed of the line, and pressure of extraction (table 5).After controlling for the values of weight gain in output of processed fabric was passed through a series of steam-heated drying drums (Fig.2). Then the treated and dried fabric was tested on the bench for the determination of duration of use (test flow/wetting/drying) and metallocenes of penopoliuretana (OPSEL LC31 from the firm sentinel products Corp., Hyannis, Massachusetts) was cut to obtain a thickness 0,635 mm foam Samples were infiltrated with 1% solution favela/glucopon, mixed in the ratio of 15:1 by weight with 1% Triton X-102. Then the treated foam was dried in a drying Cabinet at a temperature of 60oC for 30 min. While the suction fluid processed by the foams was measured for a single fluid through the implementation of the test EDANA the passage of fluid, described here, and the results are presented in table 7.Example 78
The same treatments as described in example 77, used for another metallocenes of penopoliuretana (OPSEL LC 33 from the company sentinel products Corp. ). The absorption rate of the liquid was measured as described in example 77, and the results are presented in table 7.The present invention is additionally described by the following examples.Example 79
In example 79 was used staple nonwoven fabric weighing about 85 g/cm2in which two-component fibers were arranged in a row. Components that were represented in approximately equal quantities, was polyethylene and polypropylene. Fabric cut of Nola and glucopon in the ratio of 3:1. The measured value of the WPU, described here, was approximately 200%, and so as a result of processing the fabric surface-active substance is weight gain was 6% by weight. The treated fabric was tested for wettability by placing 10 drops of water (approximately 0.1 ml) to the width of the fabric. All 10 drops instantly absorbed by tissue, indicating that the used processing gave a tissue uniformity and property to the high hydrophilicity. Control testing of untreated tissue, is subjected to the same drops of water, showed that none of the 10 drops of water did not penetrate the non-woven fabric or not absorbed by it.Example 80
In example 80 was used obtained by combing through and bond to the fabric, made from two component polypropylene and polyethylene fibers with a fineness of 3 denier, having respectively the structure of the "core-shell". The fabric is cut into pieces 20.32 cm by 25.4 see the tissue Samples were immersed for about 30 s in a solution containing 3% by weight of favela and glucopon in the ratio of 3:1. The measured value of the WPU, described here, was approximately 100%, and therefore the result of processing the fabric surface-active agent was the increase in the value Emom approximately 0.1 ml) to the width of the fabric. All 10 drops instantly absorbed by tissue, indicating that the used processing gave obtained by combing through and bond to the tissue homogeneity and property to the high hydrophilicity. Control testing of raw fabric (without finishing in the spinning process), subjected to the same drops of water, showed that none of the 10 drops of water did not penetrate the non-woven fabric or not absorbed by it.Therefore, in accordance with the invention is designed usovershenstvany processing method and obtained the treated non-woven materials, which provide the advantages mentioned above. Although the invention is illustrated konkretnymi variants of implementation, it is not limited to, implied that it covers all equivalents as being within the broad scope of the form of the invention. 1. Stable processing composition in the form of an aqueous emulsion to increase the service life of a material having a viscosity less than about 100 mPas at a temperature of approximately 25oWith and containing 5-80% alkylpolyglycoside with 8-10 carbon atoms in the alkyl chain as a viscosity modifier.2. Stable machining part under item 1, which additionally.3. Stable machining the part on p. 2, in which the surfactant comprises a mixture of ethoxylated hydrogenated oils and sorbitanoleat.4. Stable machining part under item 1, which further contains a surfactant, and the concentration of solids is less than 20 wt. %.5. Stable machining composition according to any one of paragraphs. 1-3, which is designed for processing a substrate as material.6. Stable machining composition according to any one of paragraphs. 1-3, which is designed to handle material for the manufacture of articles of personal hygiene.7. A method of processing a substrate containing phase deposition on a substrate in the processing composition having a viscosity of less than 100 mPas at a temperature of approximately 25oWith the processing composition contains alkylpolyglycoside with 8-10 carbon atoms in the alkyl chain, in the form of 5-80% water emulsion as a viscosity modifier and a surfactant at a ratio of 1: 1 to 1: 20, respectively.8. The method according to p. 7, in which the processing tool is applied using a spray tool.9. The method according to p. 8, in which is own by p. 7, in which at the stage of applying the processing composition used tub for processing, and the method includes a stage of drying.11. The method according to p. 7, in which the processing composition is applied to both sides of the substrate.12. The method according to p. 7, in which the substrate is a nonwoven fabric, and the processing composition has a concentration of solids of at least about 20 wt. % and moreover contains a blend of ethoxylated hydrogenated castor oil and sorbitanoleat.13. Material having a duration of use of at least 2 cycles when measured by tests runoff, and treated with the composition containing alkylpolyglycoside having 8 to 10 carbon atoms in the alkyl chain, as well as the blend of ethoxylated hydrogenated castor oil and sorbitanoleat.14. The material on p. 13-treated composition for p. 2, representing the way the foam.15. The material on p. 13-treated composition according to p. 3, representing the foam.16. The material on p. 13-treated composition under item 2, which is a film.17. The material on p. 13-treated composition according to p. 3, representing p
FIELD: methods of production of electret items, electret filters and respirators.
SUBSTANCE: the invention presents a method of production of electret items, electret filters and respirators with heightened resistivity to the oil mist. The invention falls into production processes of electret items, electret packed beds and respirators, and may be used for removal of corpuscles from gases, especially for removal of aerosols from air. The method provides for: formation of a melted material consisting of a mixture of a polymer composed of a mixture of a polymer representing a non-current-conducting thermoplastic resin with a specific resistivity exceeding 1014 Ohms·cm with a fluorine compound as an additive compound; shaping it to the required form and quenching it up to the temperature lower than the melting point of the polymer. The material is calcined and treated with an electric charge to give it electret properties. The invention improves the capability of filtering oily aerosols.
EFFECT: the invention improves the capability of filtering oily aerosols.
19 cl, 16 tbl, 19 dwg, 23 ex
FIELD: polymer fibers.
SUBSTANCE: polyester fiber is prepared by catalytic polycondensation involving aromatic dicarboxylate. Catalyst contains a mixture of (i) titanium compound ingredient containing titanium alkoxide and at least one product of reaction of titanium alkoxide and a specific carboxylic acid or carboxylic acid anhydride and (ii) specific phosphorus compound ingredient. Catalyst can also be constituted by product of reaction of titanium compound and specific phosphorus compound.
EFFECT: enabled preparation of material characterized by satisfactory color tone and excellent suitability for knitting or weaving and dyeing.
5 cl, 2 tbl, 39 ex