Packing laminate

FIELD: process engineering.

SUBSTANCE: invention relates to production and application of packing laminate and to food and drink package made therefrom. Laminate comprises, at least, one main layer of paper or cardboard and, at least, one barrier layer for fluid and, preferably, at least one barrier layer for gas. Paper or cardboard is impregnated with composition containing adhesive selected from the group including ketene dimers and multimers, succinic anhydride, colophony and mixes thereof, as well as acrylamide-based polymer.

EFFECT: higher water resistance.

15 cl, 10 tbl, 8 ex

 

This invention relates to a packaging laminate, its preparation and application, and packaging for food and its production.

A packaging laminate comprising at least one layer of paper or paper cardboard, is widely used for packaging containers for food products. Examples of such a laminate is disclosed, for example, in WO 02/090206, WO 97/02140, WO 97/02181 and WO 98/18680.

Completely finished containers can be manufactured from the packaging laminate modern stuffing and filling machines form, fill and seal packaging. In combination with the creation and filling packaging of the packaging laminate may be treated with a disinfectant, such as aqueous hydrogen peroxide. When a food product is packaged for long term storage, the entire package can be processed in the retort at a high temperature and Surgutgazprom pressure, for example, heated by steam and then rapidly cooled by direct contact with water. In any of these cases, the liquid or moisture can penetrate into the layer of paper or paperboard, where the edges are freely exposed. Been disclosed various attempts to solve this problem.

The previously mentioned WO 02/090206 reveals that the paper or cardboard should be placed in a state of hydrophobicity occur starting material aqueous dispersion is killenaule dimer.

WO 03/021040 discloses paper cardboard for packaging, made up of one or several layers with a top layer of bleached Kraft pulp, having a value of gloss in 15-50%, the minimum change in gloss, density in the range from 700 to 850 kg/m3and which is hydrophobic processing each layer of a sizing agent.

WO 2005/003460 discloses a packaging intended for heat treatment comprising fibrous packing material treated with a hydrophobic adhesive and containing one or more layers for reduced water penetration from the outside and/or inside of the fibrous substrate. Fibrous substrate treated with a combination of glue with resistance to moisture, hydrophobic adhesive and aluminum compounds and/or calcium.

WO 03/106155 discloses a method of producing a container from a packaging laminate to protect the edges from moisture.

WO 2004/056666 reveals a cycle of heating for packages to minimize moisture penetration through the edge.

JP Laid Open No. 2002-254532 describes containers, of paper, not conducting heat, which contains thermoplastic microspheres. Revealed that edge wick improved blocking the expansion of the microspheres on the edges of the paper.

Other disclosures relating to the use of thermoplastic microspheres in the paper for various applications include n the tents USA: 3556934, 4133688, 5125996 and 6379497, JP Patent 2689787, JP Laid Open No. 2003-105693, WO 01/54988, WO 2004/099499, WO 2004/101888, WO 2004/113613 and WO 2006/068573, US Patent Appln. Publ. No. 2001/0038893 and O. Soderberg, “World Pulp & Paper Technology 1995/96, The International Review for the Pulp & Paper Industry” p. 143-145.

Various compositions sizing means are disclosed, for example, in U.S. patents: 4654386, 59609011, 6093217, 6165259, 6306255, 6444024, 6485555, 6692560, 6818100 and 6846384.

The objective of this invention is to provide a food package made from the packaging laminate with high resistance against penetration of liquids or moisture at the edges of the laminate.

Another objective of this invention is to provide a paper or paper carton containing the packing laminate with properties suitable for this package.

It was found that these objectives can be achieved by using a certain type of sizing compositions for impregnation of paper or paper Board.

Thus, one aspect of the present invention relates to a packaging laminate comprising at least one base layer of paper or paper Board and at least one barrier layer for liquid and preferably, at least one barrier layer for gas, and the specified paper is paper or cardboard impregnated with a composition comprising a sizing agent, selected from the group consisting of the of Kerov and multimers of ketene, succinic anhydrides, rosins and mixtures thereof, and also containing polymer based on acrylamide.

Another aspect of this invention relates to a method for producing a packaging laminate comprising a stage of applying at least one barrier layer for liquid, and preferably, at least one gas barrier layer on a sheet or tape of paper cardboard or paper, which is impregnated with a composition comprising a sizing agent, selected from the group consisting of dimers and multimers of ketene, succinic anhydrides, rosins and mixtures thereof, and also containing polymer based on acrylamide.

Still another aspect of this invention relates to the use of the packaging laminate, as in the present description, for the manufacture of sealed packages for foods and beverages.

Another aspect of this invention relates to a method for producing sealed packages comprising a stage of formation of the container from a packaging laminate described above, the filling of the container with the food product or beverage and sealing the container.

A further aspect of this invention relates to a sealed package, derived from the packaging laminate, as described above.

In one embodiment, the package is suitable for packing of foodstuff or written in the Cove, which does not require heat treatment after the package is filled and sealed. Typically, such packaging is used for beverages such as milk, juice and other soft drinks, and so used the packaging laminate will be treated in the present description to the packaging laminate for liquid or cardboard packaging for liquids. The required properties of the packaging laminate for liquid include the ability to withstand liquid contents of the package and liquid disinfectants, namely, aqueous solutions of hydrogen peroxide.

In another embodiment, the package is suitable for food and beverage, where the filled and sealed package is subjected to heat treatment to increase the shelf life of the content. Such packages can be used for all kinds of foods, particularly those that are traditionally packaged in cans, and will be referred to in this description as sterilisable packaging and material, therefore as sterilisable packaging laminate or sterilized cardboard. The required properties sterilisable packaging laminate include the ability to withstand treatment with saturated steam at high temperature and pressure, for example, from about 110 to about 150°C. for a time from about 30 minutes to the ome 3 hours.

The packaging laminate according to this invention includes one or more core layers of paper or paper cardboard, usually containing cellulose fibers. Preferably, the core layer of paper or paper cardboard has a weight of paper in grams per square meter, comprising from about 30 to about 2250 g/m2or from about 50 to about 1500 g/m2most preferably from about 65 to about 500 g/m2or from about 100 to about 300 g/m2. The density takes a value of preferably from about 100 to about 1200 kg/m3most preferably from about 150 to about 1000 kg/m3or from about 200 to about 900 kg/m3.

Paper paper or cardboard can be obtained from various types of pulp such as bleached or unbleached pulp, based on crude fibers and/or wood waste. The pulp can be based on the pulp, such as sulphate, sulphite and organosilica pulp, mechanical wood pulp, such as thermomechanical pulp (TSR), chemi-thermomechanical pulp (STMR), refiner wood pulp and wood pulp from deciduous wood and pine wood, and may also be based on waste wood, optional slurries, peeled paint (DIP), and mixtures thereof. Paper or paper cardboard mo is et to contain one or more layers from the same or different types of pulp. Examples of multilayer combinations include: bleached pulp up/DIP, CTMP or mechanical wood pulp in the middle/bleached pulp at the bottom; bleached pulp up/DIP, CTMP or mechanical wood pulp in the middle/mechanical wood pulp at the bottom; bleached pulp up/DIP, CTMP or mechanical wood pulp in the middle/unbleached pulp at the bottom; and bleached pulp top/unbleached pulp and the bottom, and the upper side is optional with the floor and the bottom side is not necessarily coated. The upper side refers to the side that is intended to represent the outer side of the finished package. In multilayer paper or paper carton, at least one layer impregnated with a sizing composition described in this description. In paper or paper Board with three or more layers, preferably one of the middle layers impregnated with a sizing composition described in this description.

In paper or paper Board with one layer weight of paper in grams per square meter and preferably ranges from about 50 to about 1500 g/m2most preferably from about 100 to about 700 g/m2or from about 150 to about 500 g/m2. The density takes a value of preferably from about 100 to about 1200 kg/m3most preferably the t of about 150 to about 1000 kg/m 3or from about 200 to about 800 kg/m3.

In paper or paper Board with two layers of paper weight on the sheet in grams per square meter and preferably is from about 25 to about 750 g/m2most preferably from about 50 to about 400 g/m2or from about 100 to about 300 g/m2. Total weight of paper in grams per square meter and preferably ranges from about 50 to about 1500 g/m2most preferably from about 100 to about 800 g/m2or from about 200 to about 600 g/m2. The total density of preferably from about 300 to about 1200 kg/m3most preferably from about 400 to about 1000 kg/m3or from about 450 to about 900 kg/m3.

In paper or paper Board with three or more layers to the outer layers preferably have a weight of paper in grams per square meter of from about 10 to about 750 g/m2most preferably from about 20 to about 400 g/m2or from about 30 to about 200 g/m2. The density of the outer layers takes on the value of preferably from about 300 to about 1200 kg/m3most preferably from about 400 to about 1000 kg/m3or from about 450 to about 900 kg/m3. Central or nenarocny layer or layers preferably have a mass b the sorcerers in grams per square meter of from about 10 to about 750 g/m 2most preferably from about 25 to about 400 g/m2or from about 50 to about 200 g/m2. The Central density, neuroimage layer or layers takes is preferably from about 10 to about 800 kg/m3most preferably from about 50 to about 700 kg/m3or from about 100 to about 600 kg/m3. Total weight of paper in grams per square meter and preferably is from about 30 to about 2250 g/m2most preferably from about 65 to about 800 g/m2or from about 110 to about 600 g/m2. The total density of preferably from about 100 to about 1000 kg/m3most preferably from about 200 to about 900 kg/m3or from about 400 to about 800 kg/m3.

An implementation option sterilisable packaging laminate includes a core layer of a double layer of paper or paper of paperboard made from bleached and unbleached, respectively, Kraft pulp of coniferous trees. However, there may be used other combinations of single-layer or multi-layer paper or paper cardboard of different compositions.

Variant implementation of the packaging laminate for liquid includes a core layer of three-layer paper paper or paperboard, of which preferably at least medium is th layer impregnated with a sizing composition, described in the present description. Examples of combinations of layers include combinations mentioned above.

Paper paper or paperboard, impregnated, most preferably measured raw materials, sizing by means of one or more ketonovyh dimers and multimers, succinic anhydrides, and rosins. In layered paper and cardboard this means that at least one layer impregnated with such a sizing agent. The same or different size can be used for different layers in the paper or paper Board. For example, you can use AKD and ASA in one or more layers and rosin in one or more other layers. The number of used size is preferably from about 0.1 to about 10 kg/t of paper, preferably from about 0.3 to about 5 kg/t of paper and most preferably from about 0.5 to about 4.5 kg/t of paper or from about 2 to about 4 kg/t of paper.

Preferred ketonovye dimers have the General formula (I):

where R1and R2are the same or different saturated or unsaturated hydrocarbon group such as alkyl, alkenyl, cycloalkyl, aryl or aralkyl. The hydrocarbon group may be a branched or straight chain and is respectfully contain from 6 to 36 carbon atoms, most preferably from 12 to 20 carbon atoms. Examples of hydrocarbon groups include octillo, decile, dodecyloxy, tetradecanol, hexadecanol, octadecanol, akosile, docosanol, tetracosyl, phenyl, benzyl, beta-naftalina, tsiklogeksilnogo and hexadecyl group of branched and straight chain. Applicable ketonovye dimers include dimers derived from organic acids, such as montanosa acid, naphthenic acid, 9,10-dellanave acid, 9,10-dolezelova acid, palmitoleic acid, oleic acid, ricinoleic acid, linoleic acid, stearic acid, ezoterikova acid, aleocharinae acid, a mixture of fatty acids of natural origin, found in coconut oil, bagisova oil, palm kernel oil, palm oil, olive oil, peanut oil, rape oil, beef tallow, lard, whale oil, and mixtures of any of the above fatty acids with each of them. Depending on the hydrocarbon groups ketonovye dimers can be solid or liquid at room temperature (25°C).

It was found that surprisingly good results are obtained if ketonovy dimer or multimer, alilandry anhydride, rosin or a mixture thereof are included in the sizing composition containing the polymer-based Smoot is amide, especially charged and most preferably a cationic polymer based on acrylamide. However, it can also be used anionic, amphoteric and non-ionic polymers based on acrylamide. A suitable sizing composition is preferably a water dispersion preferably with a dry content of from about 5 to about 40 wt.%, most preferably from about 15 to about 30 wt.%. Preferably from about 50 to about 99 wt.%, most preferably from about 75 to about 95 wt.% the dry content of the composition is composed of a size described above. The number of polymer based on acrylamide is preferably from about 1 to about 50 wt.%, most preferably from about 5 to about 30 wt.% or from about 10 to about 20 wt.% dry content size.

A sizing composition may also contain other commonly used additives, such as compounds acting as dispersants, emulsifiers or stabilizers, examples of which include organic compounds such as naphthalenesulfonate, lignosulfonates, Quaternary ammonium compounds and their salts, cellulose and its derivatives, and inorganic compounds, namely compounds of polyamine, such as chloride of polyalanine, su is that of polyaluminum or silicate sulfate polyaluminum. Other additives include various types of biocides and defoamers. Additives used in sizing compositions are also described in, for example, US 6165259, US 5969011, US 6306255 and US 6846384. The number of organic compounds, which act as dispersing agents, emulsifiers or stabilizers, can be, for example, from about 0.1 to about 10 wt.% dry content. The number of connections of polyamine may be, for example, from about 0.1 to about 10 wt.% dry content. The amount of biocide may be, for example, from about 0.01 to about 2 wt.% dry content.

Preferred polymers based on acrylamide have srednevekovoy molecular weight of at least about 10,000, or at least about 50,000. In most cases, it is preferable that the molecular weight is not more than about 100000, or no more than about 500000. In most cases prefer that molecular weight is not more than about 50 million, or no more than about 20 million, or no more than about 5 million.

Applicable polymers based on acrylamide can be obtained by polymerization of acrylamide or based monomers acrylamide, preferably in combination with one or more Ethylenediamine cationic, potentially cationic, anionic or potentially the anionic monomers. The term “potentially cationic monomer”, as used in this description, refers to a monomer bearing potentially an ionisable group, which becomes cationic when the polymer to be applied to the pulp suspension. The term “potentially anionic monomer”, as used in this description, refers to a monomer bearing potentially an ionisable group that becomes an anionic when the polymer to be applied to the pulp suspension.

Examples of acrylamide and monomers on the basis of acrylamide include methacrylamide, N-acryl(meth)acrylamide, such as N-methyl(meth)acrylamide, N-ethyl(meth)acrylamide, N-propyl(meth)acrylamide, N-isopropyl(meth)acrylamide, N-n-butyl(meth)acrylamide, N-tert-butyl(meth)acrylamide and N-isobutyl(meth)acrylamide; N-alkoxyalkyl(meth)acrylamide, such as N-n-butoxymethyl(meth)acrylamide, and N-ISO-butoxymethyl(meth)acrylamide; N,N-dialkyl(meth)acrylamide, such as N,N-dimethyl(meth)acrylamide; and dialkylaminoalkyl(meth)acrylamide.

Applicable Ethylenediamine cationic or potentially cationic monomers are preferably soluble in water. Examples of such monomers include halides of diallyldimethylammonium, for example the chloride of diallyldimethylammonium, and cationic monomers represented by the General structural formula (II):

where Rsub> 1represents N or CH3; R2and R3represent, independently of one another, H or, preferably, a hydrocarbon group, in an appropriate case, alkyl having from 1 to 3 carbon atoms, preferably from 1 to 2 carbon atoms; A represents O or NH; B is an alkyl or alkilinity group having from 2 to 8 carbon atoms, in an appropriate case, from 2 to 4 carbon atoms, or hydroxypropranolol group; R4represents H or, preferably, a hydrocarbon group, in an appropriate case, alkyl having from 1 to 4 carbon atoms, preferably from 1 to 2 carbon atoms; or Deputy containing aromatic group, in a suitable case, phenyl or substituted phenyl group, which may be attached to the nitrogen through alkalinous group, typically containing 1 to 3 carbon atoms, in an appropriate case, from 1 to 2 carbon atoms, and suitable R4includes benzyl group (-CH2-C6H5); and X-is an anionic counterion, typically a halide, for example chloride.

Examples of applicable monomers represented by the General structural formula (II)include Quaternary monomers, obtained by processing dialkylaminoalkyl(meth)acrylates, for example, dimethylaminoethyl(meth)acrylate, diethylamino is mentioned(meth)acrylate and dimethylaminopropyl(meth)acrylate, or dialkylaminoalkyl(meth)acrylamides, for example, dimethylaminoethyl(meth)acrylamide, diethylaminoethyl(meth)acrylamide, dimethylaminopropyl(meth)acrylamide, and diethylaminopropyl(meth)acrylamide, methyl chloride or benzylchloride. Preferred cationic monomers of the General formula (II) include methylchloride Quaternary salt of dimethylaminoethylacrylate, methylchloride Quaternary salt of dimethylaminoethylmethacrylate, benzylchloride Quaternary salt of dimethylaminoethylacrylate and benzylchloride Quaternary salt of dimethylaminoethylmethacrylate.

Examples of applicable copolymerizing anionic or potentially anionic monomers include Ethylenediamine carboxylic acids and their salts, such as (meth)acrylic acid and its salts; Ethylenediamine sulfonic acids and their salts, such as 2-acrylamide-2-methylpropanesulfonate, sulfoethyl(meth)acrylate, vinylsulfonic acid and its salts, styrelseledamot, and parameningeal (hydroxytrol) and its salts. Can be used any salt, such as salts of sodium or other alkali metals.

Amphoteric polymers based on acrylamide can be obtained by polymerization of a mixture containing one or more monomers based on acrylamide, one or more Ethylenediamine anionic or potentially anionic monomers and one or more odorant the action Ethylenediamine cationic or potentially cationic monomers. Examples of suitable anionic or potentially anionic monomers include the monomers specified above.

The mixture of monomers to obtain a polymer based on acrylamide may also contain one or more crosslinking agents in addition to the above ethyleneamines the monomers. The presence of a polyfunctional crosslinking agent in the mixture of monomers increases the ability of the polymer to the dispersion in water. Polyfunctional crosslinking agents may be nonionic, cationic, anionic or amphoteric. Examples of suitable polyfunctional crosslinking agents include compounds containing at least two Ethylenediamine communication, for example N,N-methylene-bis(meth)acrylamide, di(meth)acrylate of polyethylene glycol, N-vinyl(meth)acrylamide, divinylbenzene, triethylammonium salts and N-methylallyl(meth)acrylamide; compounds containing Ethylenediamine communication and reactionary group, such as glycidyl(meth)acrylate, acrolein and methylol(meth)acrylamide; and compounds containing at least two reactive groups, such as dialdehyde such as glyoxal, diepoxybutane and epichlorohydrin. Suitable water-dispersible polymers may be prepared using at least 4 Mac/million polyfunctional crosslinking agent, based on the monomers present in the Monomeric mixture, or on the basis of anomeric units, present in the polymer, preferably from about 4 to about 6000 molts per million, most preferably from 20 to 4000. Examples of applicable water-dispersible polymers include polymers based on acrylamide, disclosed in US 5167766.

The ratio of acrylamide or based monomers of acrylamide and charged or potentially charged monomers is chosen so as to obtain a polymer based on acrylamide with an appropriate charge density. For cationic polymer based on acrylamide charge density is preferably from about 0.1 to about 11 mEq/g or from about 0.5 to about 10 mEq/g, most preferably from about 0.6 to about 8 mEq/g or from about 1 to about 5 mEq/g, In some cases, the charge density of the cationic polymer based on acrylamide is preferably from about 3 to about 8 mEq/g For anionic polymer based on acrylamide charge density is preferably from about 0.5 to about 10 mEq/g, most preferably from about 2 to about 8 mEq/g

Useful properties can be achieved in the embodiment where the paper or paper carton contains thermoplastic microspheres, preferably increased in volume or is not enlarged, but may increase in the volume of the microspheres, preferably, less than the least on the edges of the paper or paper Board. In multilayer paper or paper carton, at least one layer preferably contains a thermoplastic microspheres. In paper or paper Board with three or more layers, preferably at least one of the middle layer contains thermoplastic microspheres.

Thermoplastic microspheres preferably increase in size and add to the original material for making paper or paper carton or as pre-increase in volume of the microspheres, or are not enlarged but capable of thermally to an increase in the volume of the microspheres, which preferably increase in volume by heating during the process of paper manufacturing paper or cardboard, for example, during the stage of drying, which uses heat, or at the stage of the allocation process, for example, a cylindrical heater or laminator. Microspheres can increase in volume when the paper or paper cardboard still wet or when the paper or paper cardboard completely or almost completely dried up. The microspheres preferably added in the form of their aqueous suspensions, which optionally may contain other additives required for the supply of the source material. The number of added thermoplastic microspheres is preferably p is kerno 1 to about 100 kg/t of paper, most preferably from about 1 to about 50 kg/t of paper or from about 4 to about 40 kg/t of paper.

Thermoplastic microspheres, thermally capable of increasing in volume, as are referred to in the present description, preferably contain a thermoplastic polymer shell encapsulating a propellant. The propellant is preferably a liquid having a boiling point of not higher than the softening temperature thermoplastic polymer shell. When heated propellant increases the internal pressure at the same time softens the shell, resulting in a significant expansion of the microspheres. Microspheres as capable of increasing in volume, and previously increased in volume, commercially available under the trademark Expancel® (Akzo Nobel) and sold on the market in various forms, for example in the form of dry free-floating particles, aqueous suspensions or in the form of a partially dewatered wet briquette. They are also well described in the literature, for example in U.S. patents: 3615972, 3945956, 4287308, 5536756, 6235800, 6235394 and 6509384, in US Patent Applications Publication 2005/0079352, in EP 486080 and EP 1288272, WO 2004/072160, WO 2007/091960 and WO 2007/091961 in JP Laid Open No. 1987-286534, 2005-213379 and 2005-272633.

Thermoplastic polymer shell of thermoplastic microspheres preferably made from Homo - or copolymer obtained by polymerization etilen is saturated monomers. Such monomers can constitute, for example, nitrosomonas monomers, such as Acrylonitrile, Methacrylonitrile, α-chloroacrylonitrile, α-ethoxyacrylate, fumaronitrile or crotonate; acrylic esters such as methyl acrylate or acrylate; methacrylic esters such as methyl methacrylate, isobornylacrylat or methacrylate; vinylchloride, such as vinyl chloride; vinyl esters such as vinyl acetate, vinyl ethers such as alkylvinyl esters, for example metilidinovy ether or ethylenically ether, and other vinyl monomers, such as vinylpyridine; vinylidenechloride, such as vinylidenechloride; styrene, such as styrene, halogenated styrene or α-methylsterol; or diene, such as butadiene, isoprene and chloroprene. You can use any mixture of the above monomers.

Propellant thermoplastic microspheres may contain hydrocarbons, such as propane, butane, isobutane, n-pentane, isopentane, neopentane, hexane, isohexane, neohexane, heptane, isoheptane, octane or isooctane, or mixtures thereof. Besides, you can also use other types of hydrocarbons such as petroleum ether or chlorinated or fluorinated hydrocarbons such as methyl chloride, methylene chloride, dichloroethane, dichloroethylene, trichloroethane, trichloroethylene, trichlorfon the'étang, perfluorinated hydrocarbons, etc.

Expandable thermoplastic microspheres suitable for the present invention preferably have an average volume diameter of from about 1 to about 500 microns, preferably from about 5 to about 100 microns, most preferably from about 10 to about 50 microns. The temperature at which it starts to increase volume, referred to as Tstartpreferably accepts a value from about 60 to about 150°C., most preferably from about 70 to about 100°C. the Temperature at which the maximum increase in volume, referred to as Tmaxpreferably accepts a value from about 90 to about 180°C., most preferably from about 115 to about 150°C.

Previously the increase in volume of thermoplastic microspheres suitable for the present invention preferably have an average volume diameter of from about 10 to about 120 microns, most preferably from about 20 to about 80 microns. The density takes a value of preferably from about 5 to about 150 g/DM3most preferably from about 10 to about 100 g/DM3. Even if you increased the amount of thermoplastic microspheres are commercially available as such, it is also possible to provide them on the spot by the terminology is a mini-expansion does not increase in volume, but may increase in the volume of thermoplastic microspheres, for example, just before they are added to the original material, and it is easier if you are able to increase the volume of the microspheres have Tstartbelow about 100°C., and thus, the steam can be used as a medium for heating.

Paper or paper carton may further comprise a means of resisting moisture, which add to the original material before dehydration. Suitable means against moisture, include rosin from polyaminopropyl, polyamideimides, polyaminopolycarboxylic, urea/formaldehyde, urea/melamine/formaldehyde, phenol/formaldehyde, polyacrylic amide/glyoxalase condensate, polyvinylene, polyurethane, MDI, and mixtures thereof, of which particularly preferable polyamideimides (RAE). Amount against moisture, is preferably from about 0.1 to about 10 kg/t of paper, most preferably from about 0.5 to about 5 kg/t of paper.

Particularly preferable that at least one of a size, preferably ketonovy dimer, and means resisting moisture, preferably polyaminopolycarboxylic, is added to IP the same material in the manufacture of paper or paper Board.

Paper paper or cardboard may also contain other additives commonly used in the manufacture of paper and added to the original material before dehydration. Such additives may include one or more fillers, such as mineral fillers such as kaolin, white clay, titanium dioxide, gypsum, talc, chalk, crushed marble or precipitated calcium carbonate. Other commonly used additives may include restraint additives, aluminum compounds, dyes, optical whitening agents, etc. are Examples of aluminum compounds include aluminum alum, aluminates and connection of polyamine, for example the chlorides of polyalanine and sulfates. Examples restraint additives include cationic polymers, anionic inorganic products in combination with organic polymers, such as polymers based on acrylamide, for example bentonite in combination with cationic organic polymers or sols on the basis of silicic acid in combination with cationic organic polymers or cationic and anionic organic polymers.

Examples of cationic organic polymers applicable in restraint additives include, for example, polymers described in WO 2006/068576 and WO 2006/123989. In the embodiment, the cationic organic Polym which R contains one or more aromatic groups are the same or different types. The aromatic group may be present in the polymer skeleton (main chain) or in the group-the Deputy that is attached to the polymer skeleton. Examples of suitable aromatic groups include aryl, aracelio and albarillo groups such as phenyl, phenylene, naphthyl, xylylene, benzyl and phenylethyl; nitrogen-containing aromatic (aryl) groups, such as pyridine and chinoline, as well as derivatives of these groups, namely benzyl. Examples of cation-charged groups that may be present in the cationic polymer, and the monomer used to prepare the cationic polymer include Quaternary ammonium group, tertiary amino group and an acid additive salt.

The packaging laminate contains at least preferably at least two barrier layers for liquid on each side of the paper or the base layer(s) of paper and cardboard. Barrier layer for liquid can be made of any material that has no permeability or slightly permeable to water. Suitable materials include polymers of high density polyethylene or linear low density polyethylene, polypropylene, PVC, polyesters as polyethylene terephthalate, and physical or mechanical mixtures thereof. Can also be used copolymers, such as copolyme the s of ethylene and propylene. The barrier layer(s) for the liquid can be applied by any known means, such as the different ways of lamination or the like.

The packaging laminate may further comprise a barrier layer for gas preferably between the base layer and an impermeable layer for liquid intended for the front side inside the package. Can be used any material which has no permeability or slightly permeable to molecular oxygen. Examples of materials include metal foils such as aluminum foil, a coating of silicon dioxide, for example, used in the cover composition containing colloidal silicon dioxide, and optionally various additives described in WO 2006/065196, or obtained by plasma deposition. Other possible materials include polymers, such as polyvinyl alcohol or copolymers of ethylene and vinyl alcohol. Barrier layer for gas may be introduced by any known means, such as the different ways of lamination or the like.

Usually the layers are separated to ensure barriers for liquid and gas, respectively, but in the embodiment, the barrier layer for liquid and a barrier layer for gas offered in the form of a single layer of material having barrier properties as the liquid, so the gas.

The invention will be further described in connection with the following examples, which, however, should not be interpreted as limiting the scope of the invention. Unless otherwise stated, all parts and percentages relate to the masses. parts and percentages.

In the examples used one or more of the following products:

ST 1:cationic biopolymer-based starch, modified with 2,3-hydroxypropyltrimethylammonium in D.S. 0,042, the polymer having a cationic charge density of about 0.28 mEq/g
ST 2:cationic biopolymer-based starch, modified with 2,3-hydroxypropyltrimethylammonium in D.S. of 0.02, the polymer having a cationic charge density of about 0.14 mEq/g
ST 3:cationic biopolymer-based starch, modified with 2,3-hydroxypropyltrimethylammonium in D.S. 0,035, the polymer having a cationic charge density of about 0.23 mEq/g
WS 1:RAE tool against moisture (Eka WS XO)
WS 2:RAE tool, protistas the existing moisture (Eka WS 320)
SA 1:a sizing composition with AKD and 10 wt.%, per AKD, cationic polymer prepared by polymerization of 90 mol.% acrylamide and 10 mole% methylchloride Quaternary salts dimethylaminoethylacrylate and having srednevekovoy molecular weight of about 1 million and a cationic charge density of about 1.2 mEq/g
SA 2:AKD sizing agent, stabilized starch (Eka DR 28 HF)
SA 3:AKD sizing agent, stabilized starch (Eka DR C223)
MS 1:Expancel™ is able to increase the volume of the microspheres (461WU20) with an average particle size of 6-9 microns
MS 2:Expancel™ pre-increase in volume of the microspheres (461WE20) with an average particle size of 20-30 microns
MS 3:Expancel™ is able to increase the volume of the microspheres (820SL40) with an average particle size of 10-16 μm
MS 4:Expancel™, is able to increase the volume of the microspheres (551DUX12), fraction with an average particle size of 4-6 microns
PL 1`: cationic polymer based on acrylamide obtained by the polymerization of 90 mol.% acrylamide and 10 mole% methylchloride Quaternary salts dimethylaminoethylacrylate and having srednevekovoy molecular weight of about 6 million and a cationic charge of about 1.2 mEq/g
PL 2:cationic polymer based on acrylamide obtained by the polymerization of 90 mol.% acrylamide and 10 mole% benzylchloride Quaternary salts dimethylaminoethylacrylate and having srednevekovoy molecular weight of about 6 million and a cationic charge of about 1.2 mEq/g
NP 1:anionic inorganic condensation polymer of silicic acid in the form of modified colloidal silica Sol having an S value of <35 and containing particles based on silica with a specific surface area of approximately 700 m2/g

Example 1The Central layer of the packaging carton for liquids with the weight of paper in grams per square meter and about 120 g/m2got in a dynamic listopadova (Formette Dynamic, supplied by the company Fibertech AB, Sweden) from the source material based on 100% unbleached fibers chemi-thermomechanical pulp (STMR) with the consistency of the source material of 0.5% neitralnym pH.

The paper sheets were formed in a dynamic listopadova the pumping source material from the mixing tank through a transverse nozzle in a rotating drum on the water film to the top of a cylindrical rod, the abstraction of the source material for the formation of the sheet, pressing and drying the sheet.

Produced incorporating additives in the following times (in seconds) before the upload:

90, cationic starch

75, RAE tool against moisture

60, AKD sizing tool

45, Expancel™ microspheres

30, cationic polymer

15, anionic colloidal solution of silicon dioxide

0, pumping

The sheets of paper cardboard extruded and dried in a cylindrical drying plant at 140°C, which causes heat treatment of the microspheres in the lining both wet and dry paper and increase in volume, at least not increase in volume of the microspheres. Used two different methods of drying:

wet heat treatment: preliminary drying 2 min 105°C (humidity) + final drying at 140°C.;

dry heat treatment: drying 10 min 105°C (dry) + final drying at 140°C.

Samples were prepared by laminating the material of cardboard with PVC and cut into pieces 75×25 mm

The penetration through the raw edges of the samples (REP) was evaluated in two ways:

1. REP water: water 80°C 3 o'clock

2. REP N2About2: aqueous 35% hydrogen peroxide, 70°C, 10 minutes

The results of wet heat treatment shown in table 1, while the results of the dry heat treatment shown in table 2. The amount of additives designed in the form of a dry product to dry source material, except for the particles on the basis of silicon dioxide, which is calculated as SiO2in the calculation of the dry starting material.

Table 1
Wet heat treatment
Test No.ST1 (kg/t)WS1 (kg/t)SA1 (kg/t)MS (kg/t)/typeRetention system PL1/NP1REP H2O2(kg/m2)
15-0,5-0,3/0,315,22
25-4-0,3/0,32,08
35-0,54/1 MS0,3/0,3of 13.05
4510,54/1 MS0,3/0,39,10
55-44/1 MS0,3/0,31,35
65-440/MS 10,3/0,31,42
75-44/MS 20,3/0,31,16
85-440/MS 20,3/0,31,63

Table 2
Dry heat treatment
Test No.ST1 (kg/t)WS1 (kg/t)SA1 (kg/t)MS (kg/t)/typeRetention system PL1/NP1REP of water (kg/m2)
1(FL.)5-0,5-0,3/0,310,18
2(FL.)5-4-0,3/0,34,00
35-0,54/1 MS0,3/0,3to 9.93
4510,54/1 MS0,3/0,39,54
55- 44/1 MS0,3/0,33,82
65-440/MS 10,3/0,33,25
75-44/MS 20,3/0,33,32
85-440/MS 20,3/0,33,55

Example 2The Central layer of the packaging carton for liquids produced in HRM (experimental machine for paper) with the same slurry used in example 1 at pH 8.0.

The introduction of additives to the original material was carried out in the following order:

Cationic starch of 1.50%

RAE tool against moisture

Expancel™ microspheres

Cationic starch of 2.50%

AKD sizing tool

Cationic polymer

Anionic colloidal solution of silicon dioxide

Paper tape was dried to a maximum at 100°C in HRM (maximum drying temperature 100°C). Microspheres ACC is RGALI dry heat treatment at 140°C in a cylindrical dryer. Samples were prepared and tested as in example 1 except that the aqueous hydrogen peroxide was only 30%. The results are shown in table 3, with quantities of additives, calculated as in example 1.

Example 3The Central layer of the packaging carton for liquids produced and tested by REP in the water, following the example 2. The results are shown in table 4.

Table 3
Test No.ST1 (kg/t)SA1 (kg/t)MS (kg/t)/typeRetention system PL1/NP1REP of water (kg/m2)REP N2About2(kg/m2)
1(FL.)3+3--0,15/313,9921,31
23+30,5-0,15/313,0620,82
33+31-0,15/36,2214,62
43+3 4-0,15/34,087,01
53+30,54/1 MS0,15/311,9619,95
63+30,520/MS 10,15/311,4720,17
73+30,540/MS 10,15/311,7120,44
83+344/1 MS0,15/33,544,90
93+3420/MS 10,15/33,445,23
103+3440/MS 1 0,15/33,76are 5.36
113+30,54/MS 20,15/311,0619,96
123+30,520/MS 20,15/311,2218,47
133+30,540/MS 20,15/311,5520,31
143+344/MS 20,15/3of 3.645,54
153+3420/MS 20,15/3of 3.646,99
163+3440/MS 20,15/32,66 7,38
173+30,54/3 MS0,15/312,5920,12
183+30,520/3 MS0,15/312,3719,65
193+30,540/3 MS0,15/312,8323,14
203+344/3 MS0,15/33,535,00
213+3420/3 MS0,15/34,235,01
223+3440/3 MS0,15/34,106,16
Table 4
Test No.ST1 (kg/t)SA (kg/t)/typeWS2 (kg/t)MS (kg/t)/ typePL (kg/t)/typeNP 1 (kg/t)REP of water (kg/m2)
13+3---0,15/PL 1310,80
2(FL.)3+32/SA 2--0,15/PL 134,06
33+32/SA 1--0,15/PL 133,80
43+32/SA 11-0,15/PL 133,66
53+32/SA 1-40/MS 10,15/PL 13of 3.56
63+32/SA 1120/MS 10,15/PL 133,42
7(FL.)3+32/SA 2-40/MS 20,15/PL 13the 3.65
83+32/SA 1-40/MS 20,15/PL 133,12
93+32/SA 110,15/PL 133,53
10(FL.)3+32/SA 2-40/3 MS0,15/PL 133,69
113+32/SA 1-40/3 MS0,15/PL 233,26
123+32/SA 1120/3 MS0,15/PL 133,49
133+32/SA 1140/3 MS0,15/PL 132,90

Example 4: Capable of reused cardboard with the weight of paper in grams per square meter of approximately 250 g/m2made in the PFI listopadova supplied Hamjern Maskin A/S, Norway, from the source material on the basis of the e 100% bleached softwood Kraft fibers with the consistency of the source material of 1.88%.

Produced making supplements to the original material in the following times (in seconds) before dehydration:

75, AKD sizing tool

60, Expancel™ microspheres

45, cationic starch

30, cationic polymer

15, anionic colloidal solution of silicon dioxide

0, dehydration

The sheets of paper cardboard extruded and dried in a cylindrical drying plant at 140°C, which causes heat treatment of the microspheres in the lining damp paper tape and increase in volume, at least not increase in volume of the microspheres. Used the following method:

wet heat treatment: a cylindrical drum 1 h 85°C (humidity) + final drying at 140°C.

Samples were prepared according to the method of example 1, and the penetration through the raw edges of the samples (REP) was evaluated by steam treatment in an autoclave for 60 min at 130°C and 2 bar(0.2 MPa). The autoclave was a Certoclav TT 121 supplied by the company Certoclav Sterilizer GmbH, Austria. The results are shown in table 5, with quantities of additives, calculated as in example 1.

Table 5
Test No.ST1 (kg/t)SA1 (kg/t)MS (kg/t)/typeRetention system PL1/NP11(FL.)7--0,5/0,451,15
270,75-0,5/0,450,55
370,755/MS 20,5/0,450,44
470,7540/MS 20,5/0,450,28
570,755/1 MS0,5/0,450,40
670,7510/3 MS0,5/0,450,43
770,7540/3 MS0,5/0,450,40
870,7510/MS 40,5/0,450,40

Example 5: Capable of reused cardboard produced by the method of example 4, but with the source material based on 100% unbleached softwood Kraft fibers and with the consistency of the source material of 1.75%.

Produced making supplements to the original material in the following times (in seconds) before dehydration:

75, AKD sizing tool

65, RAE tool against moisture

55, Expancel™ microspheres

45, cationic starch

30, cationic polymer

15, anionic colloidal solution of silicon dioxide

0, dehydration

The sheets of paper cardboard extruded and dried in a cylindrical drying plant at 160°C, which causes heat treatment of the microspheres in the lining dry or wet the paper and increase in volume, at least not increase in volume of the microspheres. Used in the following ways:

dry heat treatment: a cylindrical drum 3 h 85°C (dry) + final drying 160°C;

wet heat treatment: a cylindrical drum 1 h 85°C (dry) + final drying 160°C.

Samples were prepared and tested according to the method of example 1 and evaluated the penetration through the raw edges of the samples, EP, in two different ways:

1. REP pair: autoclave with steam 130°C, 60 min, 2 bar (0.2 MPa).

2. REP N2About2: aqueous 35% hydrogen peroxide, 70°C, 10 minutes

The results of the dry heat treatment is shown in table 6, while the results of wet heat treatment shown in table 7, with quantities of additives, calculated as in example 1.

Table 6
Dry heat treatment
Test
No.
ST 2
(kg/t)
SA 1
(kg/t)
WS 1
(kg/t)
MS 1
(kg/t)
System
holding PL1/NP1
(kg/t)
REP
pair
(kg/m2)
REP N2About2
(kg/m2)
1(FL.)7---0,5/0,452,14of 7.64
270,375--0,5/0,45 0,602,04
3(FL.)7-20,5/0,450,45of 8.37
4(FL.)7--50,5/0,452,75to 7.32
570,375-50,5/0,450,412,17
6(FL.)7-250,5/0,450,40to 6.43
770,375250,5/0,450,442,34
87 0,75--0,5/0,450,770,92
970,752-0,5/0,450,491,30
1070,75-50,5/0,450,470,85

Table 7
Wet heat treatment
Test No.ST 2
(kg/t)
SA 1
(kg/t)
WS 1
(kg/t)
MS 1
(kg/t)
Retention system PL1/NP1 (kg/t)REP N2About2
(kg/m2)
1(FL.)7---0,5/0,45 10,19
270,375--0,5/0,45is 3.08
3(FL.)7-2-0,5/0,45and 5.30
4(FL.)7--50,5/0,458,93
570,375-50,5/0,452,77
6(FL.)7-250,5/0,454,13
770,375250,5/0,452,42
8 70,75--0,5/0,451,29
970,752-0,5/0,45to 2.06
1070,75-50,5/0,451,21

Example 6: Capable of reused cardboard produced by the method of example 4, but with the consistency of the source material of 2.1%. Produced making supplements to the original material in the following times (in seconds) before dehydration:

75, AKD sizing tool

60, Expancel™ microspheres

45, cationic starch

30, cationic polymer

15, anionic colloidal solution of silicon dioxide

0, dehydration

The sheets of paper cardboard extruded and dried in a cylindrical drying plant, causing heat treatment of the microspheres in the lining damp paper tape and increase in volume, at least not increase in volume of the microspheres. Used in the following ways:

1. The cylindrical drum 2 h 70°is (more humidity) + final drying at 140°C.

2. The cylindrical drum 2 h 70°C (humidity) + final drying 160°C.

Samples were prepared according to the method of example 4, and evaluated the penetration through the raw edges of the sample, REP, in two different ways:

1. REP pair: autoclave with steam 130°C, 60 min, 2 bar (0.1 MPa).

2. REP water: water 80°C, 3 hours

REP pair was evaluated for samples dried at 140°C, and REP of water for the samples dried at 160°C.

The results are shown in table 7, with quantities of additives, calculated as in example 1.

Table 8
Test No.ST1
(kg/t)
SA1
(kg/t)
MS
(kg/t)/type
System
retention
PL1/NP1
REP pair
(kg/m2)
REP of water
(kg/m2)
1(FL.)7--0,5/0,45of 2.21of 9.21
270,75-0,5/0,450,532,30
370,755/MS 20,5/0,450,451,61
470,7510/MS 20,5/0,450,451,27
570,7520/MS 20,5/0,450,44of 1.57
670,7540/MS 20,5/0,450,271,05
770,7510/3 MS0,5/0,450,441,82

Example 7: Capable of reused cardboard produced by the method of example 6. Produced making supplements to the original material in the following times (in seconds) before dehydration:

75, AKD sizing tool/p>

60, Expancel™ microspheres

45, cationic starch

30, cationic polymer

15, anionic colloidal solution of silicon dioxide

0, dehydration

The sheets of paper cardboard extruded and dried in a cylindrical drying plant, causing heat treatment of the microspheres in the lining damp paper tape and increase in volume, at least not increase in volume of the microspheres. Used the following method:

wet heat treatment: a cylindrical drum 2 h 70°C (humidity) + final drying at 140°C.

Samples were prepared and evaluated according to the method of example 1. The results are shown in table 8, with quantities of additives, calculated as in example 1.

Table 9
Test No.ST1
(kg/t)
SA1
(kg/t)
MS
(kg/t)/type
System
retention
PL1/NP1
REP N2About2
(kg/m2)
1(FL.)7--0,5/0,4523,17
270,75 -0,5/0,450,88
370,755/MS 20,5/0,450,70
470,755/1 MS0,5/0,450,67
570,7510/3 MS0,5/0,450,68
670,7510/MS 40,5/0,450,77

Example 8: Capable of reused cardboard, in two layers, with the weight of paper in grams per square meter of approximately 200 g/m2produced in a dynamic listopadova (Formette Dynamic, supplied by the company Fibertech AB, Sweden)using 50% from the original material based on 100% unbleached softwood Kraft fibers and texture of the original material of 0.5% for the formation of the lower layer, and using 50% of the original material on the basis of 100% bleached softwood Kraft fibers and consistency of the original Mat is Rial 0.5% for the education of the upper layer. In both the raw materials and the conductivity was 1.5 Cm/cm and the pH was approximately neutral.

The paper sheets were formed in a dynamic listopadova the pumping source material from the mixing tank through a transverse nozzle in a rotating drum on the water film to the top of a cylindrical rod, the abstraction of the source material for the formation of the sheet, pressing and drying the sheet. The original materials were added successively to the formation of two layers in a carton capable of autoclaving.

The introduction of additives in each of the raw materials produced in the following times (in seconds) before the upload:

90, cationic starch

75, RAE tool against moisture

60, AKD sizing tool

45, Expancel™ microspheres

30, cationic starch

15, anionic colloidal solution of silicon dioxide

0, pumping

The sheets of paper cardboard extruded and dried in an oven, causing heat treatment of the microspheres in the lining damp paper tape and increase in volume, at least not increase in volume of the microspheres. Used the following method:

dry heat treatment: drying 20 min 105°C (dry) + final drying 10 min 105°C.

Samples were prepared according to the method of example 1, and the penetration is not processed edge of the sample, REP, was estimated using:

REP steam+ water: the autoclave with steam 130°C, 60 min, 2 bar + water 6°C, 10 min. Measured Flexural resistance according to SCAN P 29:95, using the device L&W Bending Resistance Tester, Type 16D supplied by the company Lorentzon&Wettre, Sweden. The index of resistance to bending was calculated by dividing the resistance curve on a lot in Cuba. The results are shown in table 10, with quantities of additives, calculated as in example 1.

Table 10
Test
No.
ST 2
(kg/t)
WS 1
(kg/t)
SA 1
(kg/t)
/type
MS 1
(kg/t)
/type
ST 3
(kg/t)
NP1
(kg/t)
REP
pair
(kg/m2)
The index of resistance to bending (Nm6/kg3)
1(FL.)7---3-4,5715,9
2(FL.)7-4/SA 1-3045 1,2815,1
37-4/SA 1-30,451,0715,4
4(FL.)74--30,454,4316,7
5744/SA 1-30,451,0815,5
67-4/SA 14/3 MS30,450,8416,0
77-4/SA 110/3 MS3 0,450,9216,4

Obviously, it was possible to get as low penetration through the raw edges, and high resistance to bending.

1. A packaging laminate comprising at least one base layer of paper or paper carton, and at least one barrier layer for liquid, and preferably, at least one barrier layer for gas, and the specified paper is paper or cardboard impregnated with a composition comprising a sizing agent, selected from the group consisting of dimers and multimers of ketene, succinic anhydrides, rosins and mixtures thereof, and also containing polymer based on acrylamide.

2. The packaging laminate according to claim 1, additionally containing at least one barrier layer for gas.

3. The packaging laminate according to any one of claims 1 and 2, where the polymer based on acrylamide has srednevekovoy molecular weight equal to at least about 10,000.

4. The packaging laminate according to any one of claims 1 and 2, where the polymer based on acrylamide is cationic.

5. The packaging laminate according to claim 4, where the charge density cationic polymer based on acrylamide accepts a value from about 0.1 to about 11 mEq/g

6. The packaging laminate according to any one of claims 1 and 2, where the polymer based on acrylamide polychaets the polymerization of acrylamide or based monomers acrylamide in combination with one or more Ethylenediamine cationic, potentially cationic, anionic or potentially anionic monomers.

7. The packaging laminate according to claim 4, where the polymer based on acrylamide obtained by the polymerization of acrylamide or based monomers acrylamide in combination with one or more Ethylenediamine cationic or potentially cationic monomer, which is diallyldimethylammonium halide or represented by General structural formula (II)

where R1represents N or CH3; R2and R3represent independently from each other H or preferably a hydrocarbon group; And a represents O or NH; b is an alkyl or alkilinity group having from 2 to 8 carbon atoms or hydroxypropranolol group; R4represents H or a hydrocarbon group having from 1 to 4 carbon atoms, or Deputy containing aromatic group, which may be attached to the nitrogen through alkalinous group; and X-is an anionic counterion.

8. The packaging material according to claim 7, where at least one cationic monomer selected from the group consisting of methylchloride Quaternary salts dimethylaminoethylacrylate, methylchloride Quaternary salts dimethylaminoethylmethacrylate, benzylchloride Quaternary salicylideneaniline and benzylchloride Quaternary salts dimethylaminoethylmethacrylate.

9. The packaging laminate according to any one of claims 1 and 2, where the sizing agent is selected from the group consisting of ketonovyh dimers or polymers and mixtures thereof.

10. The packaging laminate according to any one of claims 1 and 2, where the paper or paper cardboard includes thermoplastic microspheres.

11. The packaging laminate of claim 10, where thermoplastic microspheres increased in volume.

12. A method of obtaining a packaging laminate comprising a stage of applying at least one barrier layer for liquid on the sheet or tape of paper or paper cardboard impregnated with a composition comprising a sizing agent, selected from the group consisting of ketonovyh dimers and multimers, succinic anhydrides, rosins and mixtures thereof, and also containing polymer based on acrylamide.

13. The use of the packaging laminate according to any one of claims 1 to 11 for receipt of sealed packages for foods and beverages.

14. Hermetic packaging for food and beverages made of a packaging laminate according to any one of claims 1 to 11.

15. A method of obtaining a hermetic package, which includes stages of forming a container from a packaging laminate according to any one of claims 1 to 11, the container is being filled food product or beverage and sealing the container.



 

Same patents:

FIELD: textiles, paper.

SUBSTANCE: paper base is intended for internal and external sizing, which has high dimensional stability, and can be used in pulp and paper industry. Paper base contains cellulose fibers, at least one filler, and sizing agent. At that the paper base has a coefficient of hygroextension from 0.6 to 1.5%. The Scott internal constraint in the transverse direction is not greater than 300 J/m2, and/or Scott internal constraint in the longitudinal direction is not greater than 300 J/m2. Also a method of manufacturing the paper base and versions of paper base are proposed.

EFFECT: increased dimensional stability and durability of the surface of the paper base.

26 cl, 24 dwg, 15 tbl, 5 ex

Paper sizing // 2429323

FIELD: textile, paper.

SUBSTANCE: invention relates to a water dispersion (its version) of a cellulose-active gluing substance (its version), a method to produce the water dispersion (its version), application of the water dispersion and a method of paper making. The water dispersion of the cellulose-active gluing substance contains an acid anhydride, an anion polyelectrolyte and a nitrogen-containing organic compound, which is an amine or a corresponding quaternary ammonia compound, having the molecular weight of less than 180 or having one or several hydroxyl groups. The method to produce the water dispersion of the cellulose-active gluing substance and its version includes dispersion of the acid anhydride in the water phase in presence of the anion polyelectrolyte and the nitrogen-containing organic compound, which is the amine or the corresponding quaternary ammonia compound, having the molecular weight of less than 180 or having one or several hydroxyl groups. The above specified water dispersions of the cellulose-active gluing substance may be used for sizing in mass or for surface sizing in paper making. The method of paper making includes addition of the above-specified water dispersions of the cellulose-active gluing substance to the water suspension of cellulose with subsequent dehydration of the produced suspension on a net of a paper-making machine or by application of these dispersions onto a surface of a cellulose sheet.

EFFECT: improved stability of the gluing water dispersion and efficiency of sizing, energy and capital cost saving.

41 cl, 13 tbl, 7 ex

FIELD: textile, paper.

SUBSTANCE: ground paper contains a certain amount of cellulose fibres and a gluing substance, besides, ground paper has a coefficient of hygro-expansion from 0.6 to 1.5%, inner link of Scott in cross direction not more than 130 J/m2 and/or inner link of Scott in longitudinal direction of not more than 130 J/m2.

EFFECT: increased stability of dimensions and strength of ground paper surface.

28 cl, 28 dwg, 12 tbl, 5 ex

FIELD: textile, paper.

SUBSTANCE: emulsion contains anhydrides of fatty acids, which are produced from unsaturated or saturated fatty acids or their mixtures with length of chain from 12 to 24 carbon atoms and are preserved as liquid at the temperature below 50°C. If necessary, emulsion for paper sizing additionally contains a reactive or a non-reactive agent for sizing and/or a fixator with aluminium ions content. Emulsion for paper sizing is produced by emulsification of fatty acids in water phase by means of shearing forces or intense mixing. Emulsifiers are used to form emulsion. Emulsion is used for continuous sizing of paper mass or to treat paper surface in sizing press. Emulsion is used to produce paper.

EFFECT: eliminates formation of sediments with sticky consistency with regular indices of pH in process of paper making and reduced duration of contact with water system.

16 cl, 4 tbl, 5 ex

FIELD: construction.

SUBSTANCE: ground contains cation water-fast additive, alkaline glueing agent and anion activator in specified amount. Anion activator it contains is a component selected from group, including polyacrylate, sulfonate, carboxymethylcellulose and galactomannan hemicellulose. Ground paper has pH from approximately 7.0 to approximately 10, and strength of internal link from approximately 25 to approximately 350 millifeet per pound per square inch. This ground paper is produced by contact of a certain amount of cellulose fibres with water-fast additive, alkaline gluing agent and anion activator, serially and/or simultaneously.

EFFECT: improved physical properties of ground paper and expanded assortment of paper tapes to cover joints.

22 cl, 1 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: substrate has a paper base containing cellulose fibre from deciduous wood with particle size smaller than 200 mcm after grinding in amount of not more than 45 wt % and average fibre length between 0.4 and 0.8 mm and filler in amount of 5-40 wt %, particularly 10-25 wt % in terms of the weight of cellulose.The substrate at least contains one polymer layer lying at least on one side of the paper base. There is a layer with a binding agent between the polymer layer and the paper base. The binding agent is a hydrophilic film-forming polymer made from hydroxypropylated starch and/or thermally modified starch. This layer may contain a pigment in form of calcium carbonate, kaolin, talc, titanium dioxide and/or barium sulphate.

EFFECT: reduced limpness and obtaining pure-bred production wastes.

27 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: adhesive contains a basic component in form of brewer's or distiller's yeast which is a waste from the brewing or distillation industry. The residue of brewer's or distiller's yeast is treated with 2% sodium hydroxide solution in ratio of 1:1. The adhesive composition contains the treated residue of brewer's yeast, glycerin and boric acid. Components of the composition are in the following ratio, pts. wt: residue of brewer's or distiller's yeast treated with 2% sodium hydroxide solution in ratio of 1:1 96.0-98.0; glycerin 1.9-3.7; boric acid 0.1-0.3.

EFFECT: adhesive composition has high adhesive capacity and low cost.

2 tbl

Paper making method // 2384661

FIELD: textile, paper.

SUBSTANCE: method relates to paper production and can be used in pulp-and-paper industry. Method involves the use of cellulose suspension from cellulose fibres and fillers (optional), dehydration of cellulose suspension on grid or sieve so that a sheet can be formed. Then the sheet is dried. In this method there used is polymeric addition which includes ethylenically unsaturated monomer soluble in water or potentially soluble in water, and ethylenically unsaturated monomer containing a reactive group. The latter represents an epoxy group. The polymeric addition used has molar weight which is less than one million. Polymer is obtained from mixture of monomers, which includes acrylamide and glycidyl methacrylate. Thus, the obtained polymer is used as an addition for increase of paper durability in dry condition, in wet condition, as reagent for internal paper sizing and for surface sizing.

EFFECT: increasing paper durability.

17 cl, 2 tbl, 3 ex

Paper filler // 2345189

FIELD: textile, paper.

SUBSTANCE: filler is designed for paper making and can be used in pulp-and-paper industry. Filler contains calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where filler is essentially free from either cellulose fibre or fibrils or lignocellulose. Filler contains calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where cellulose derivative can contain cationic groups. Besides the invention refers to production process of filler involving mixing the agent substance containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, essentially without cellulose fibre or fibrils or lignocellulose. Other production process of filler consists in mixing the agent substance containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where cellulose derivative contains cationic groups. The invention refers to method for making paper including preparation of aqueous suspension containing cellulose fibre, suspension addition with filler containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where filler is essentially free from either cellulose fibre or fibrils or lignocellulose; dehydration of suspension thus making web or paper sheet. The invention also refers to method for making paper including preparation of aqueous suspension containing cellulose fibre; suspension addition with filler containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where cellulose derivative contains cationic groups; dehydration of suspension thus making web or paper sheet.

EFFECT: higher sizing efficiency with good drainage, retention and serviceability of papermaking machine.

24 cl, 3 tbl, 4 ex

FIELD: textile fabrics, paper.

SUBSTANCE: composition concern pulp and paper industry and is intended for cellulose-bearing materials surface treatment. The first composition includes modified carbamide - formaldehyde oligomer and in the capacity of modifier is sodium salt of carboxymethyl cellulose. The second composition contains mentioned above components and melamine. The third composition contains components of the first composition and cationic starch.

EFFECT: improving of composition and strength properties of cellulose-bearing materials.

3 cl, 3 tbl, 12 ex

FIELD: chemistry.

SUBSTANCE: invention relates to layered material comprising an inner layer of aluminium foil, a paper middle layer and an outer layer of aluminium foil. The inner layer of aluminium foil and the middle layer are then laminated using a method selected from adhesive lamination with polyutherane, polyvinyl acetate and an acrylic adhesive, and extrusion lamination with polyethylene; and the inner layer of aluminium foil and the paper middle layer are then hardened. The paper middle layer and the outer layer of aluminium foil are laminated using a method selected from adhesive lamination with polyurethane, polyvinyl acetate and an acrylic adhesive, and extrusion lamination with polyethylene. The inner layer of aluminium foil, the paper middle layer and the inner layer of aluminium foil are then hardened.

EFFECT: while providing the given barrier properties, the obtained material enables to withstand various manufacturing and processing conditions to which the packaging is subjected.

14 cl, 2 dwg

Packing laminate // 2444440

FIELD: process engineering.

SUBSTANCE: invention relates to packing laminate, its fabrication and application, to package for foodstuffs or drinks. Retortable packing laminate comprises main layer of sized paper or cardboard, barrier layer for liquid and barrier layer for gas. Note here that said paper or cardboard comprises expanded or nonexpanded expanding thermoplastic microspheres.

EFFECT: higher resistance against water and gas penetration.

17 cl, 10 tbl, 8 ex

FIELD: process engineering.

SUBSTANCE: invention relates to lamination and laminate made thereby. Proposed method consists in direct impregnation by pressing of non-impregnated substrate material with non-impregnated decorative layer and one or more upper layers impregnated with polymer that feature intensity of effluent resin exceeding 8%. Method is implemented using short-cycle presses at 15 to 40 bar and 140 to 220 220°C. Intensity of effluent resin is determined by the formula

EFFECT: lamination by direct pressing using short-cycle presses with good quality of finished laminate surface.

13 cl, 3 ex

FIELD: process engineering.

SUBSTANCE: invention relates to multilayer substrate 60 and method to produce a counterfeit-protected paper. Proposed substrate consists of the first paper interlayer (10, 202) with density varying from 10 to 80 g/m2 and second paper interlayer (20, 214) with density varying from 10 to 80 g/m2, and one layer of plastic made from thermosetting polymer materials arranged between aforesaid interlayers (10, 20, 202, 214) and bound therewith. Proposed method consists in that plastic layer, as-melted, is introduced between said paper interlayers (10, 20, 202, 214) for them to be squeezed between two rolls (50) in continuous process. Said two rolls 50 are kept at temperature exceeding room temperature but lower than that plastic material melt. Paper interlayers and plastic layer are bound together due to atomic-molecular forces between said layers to produce penetration zone wherein plastic layers are bound with fibrous material of aforesaid interlayers (10, 20, 202, 214). Plastic layer density varies from 22 to 80 g/m2.

EFFECT: better counterfeit protection, longer life.

38 cl, 5 ex, 3 tbl, 4 dwg

FIELD: construction.

SUBSTANCE: packet, which is assembled from a layer of barrier paper, layers of power paper impregnated with resin, intermediate layer of paper with high content of resin - 60÷75%, decorative layer of paper that is not impregnated with resin with decorative pattern and coating from earlier hardened resin is continuously pressed only on one side at the pressure of 15÷35 bar, temperature of 170÷200°C, speed of pressing 4÷20 m/min. On completion of pressing subsequent completing operations are performed, which include cooling and cutting of edges.

EFFECT: production of object with high characteristics of surface glossiness with higher light refraction, increased resistance to wear, to action of water and chemical reagents.

3 ex

FIELD: technological processes.

SUBSTANCE: invention is related to technology for production of biodegradable flaky paper-based materials, in particular to containers for liquid or hard, hot or cooled food products. Biodegradable flaky material contains paper base, having the first and second layers of polyethers applied at least on single surface of base. Intermediate layers of polymers between surface of base and copolyethers applied on base surface are actually unavailable. Copolyethers of both layers are non-identical products of copolymerisation of benzol-1,4-dicarboxylic acid with aliphatic diatomic spirit and at least one reagent selected from group including aliphatic dicarboxylic acid, cyclic diatomic spirit, aromatic diatomic spirit.

EFFECT: production of moulded product with improved technical characteristics resistant to damage and softening.

27 cl, 4 dwg, 1 ex

FIELD: chemical industry; light industry; other industries; production of the caps for the packing tare sealing.

SUBSTANCE: the invention is pertaining to production of the caps used for the packing tare sealing. The cap is made with the capability of its fixation by means of the thermal welding to the opening of the hermetic bowl and the subsequent its opening. At that the cap contains the layer of the fibrous material, the polymeric layer, the barrier layer concerning the oxygen and the polymeric thermosealing layer. At that the thermosealing layer contains: the copolymer of ethylene and methylacrylate, the copolymer of ethylene and vinylacetate and the polyamide wax. The thermosealing layer is fixed directly on the barrier layer in relation to the oxygen layer having the more higher fusion point - all without any intermediate binding agents. The presented invention also concerns to the method of manufacture of the cap, and also the hermetic bowl supplied with the above-mentioned cap, and to the method of manufacture of the above- mentioned bowl. The invention ensures manufacture of the cap attached by the thermal method and easily opened, besides, the given cap may be manufactured by extrusion within the limits of one operation, and also to diminish the number of the polymeric layers applied one over another.

EFFECT: the invention ensures manufacture of the cap attached by the thermal method and easily opened, besides, the given cap may be manufactured by extrusion within the limits of one operation, and to diminish the number of the polymeric layers applied one over another.

17 cl, 5 dwg, 3 ex

FIELD: packing means, particularly containers.

SUBSTANCE: laminated material 30 comprises rigid bendable substrate 31 made of paper or cardboard, external water-tight coverings 32, 33 and aluminum gas-barrier foil 34 located between substrate 31 and one external covering 32. Laminated material comprises at least one additional layer 35 used as gas-barrier between substrate 31 and aluminum foil 34. Additional layer 35 is connected to substrate 31 through intermediate or adhesive layer 36. External coverings 32, 33 and intermediate or adhesive layer 36 are made of polypropylene. Packing container and product packing method with the use of the container are also disclosed.

EFFECT: possibility to prevent or compensate container gas losses through aluminum foil cracks or similar tightness failure caused by stresses, especially by ones appearing during container production of described packing material.

12 cl, 3 dwg

FIELD: construction materials industry; other industries; production of the plates produced by the direct lamination.

SUBSTANCE: the invention presents the plate of the direct lamination. The purpose of the invention is creation of the plate of the direct lamination, so that in it the graphics image of the relief shall correspond to the relief reconstruction of its surface. At that it is possible to use the hot pressure moderate for the decorative layer. The plate is manufactured by the method of the hot pressing of the core with the resin-saturated absorbing layers including the surface with one decorative layer containing the graphics image of the surface of the imitated material. The plate also contains the deposited on the decorative layer transparent covering layer with the relief reconstitution of the surface structure of the imitated material. Between the decorative layer and the core there is the intermediate resin-containing layer made in the form of the prefabricated separate adhesive layer with the saturating resin. The given version has the technological advantages at manufacture of the plates of the big dimensions, and also allows to manufacture the plates having the structured surfaces, at that the structure precisely coincides with the graphics image of the below located decorative layer.

EFFECT: the invention ensures creation of the plate of the direct lamination, which graphics image of the relief precisely corresponds to the relief reconstruction of its surface and the given version has the technological advantages at manufacture of the plates of the big dimensions.

3 cl, 2 dwg

FIELD: pulp-and-paper industry; methods of production of the laminated paper of the high density and the high oxygen permeability.

SUBSTANCE: the invention is pertaining to the field of the pulp-and-paper industry, in particular, to the barrier substance and the method of its realization. The method allows to produce the laminate of the paper coated with the polyolefin, at that the paper is manufactured out of the wet fibrous mass, which is not enabled to dry before manufacture of the paper, and before the polyolefin application on the paper - the paper is modified in such a manner that its surface energy has changed approximately up to the value equal to the surface energy value of the polyolefin. The presented method ensures the manufacture of the barrier substance with the stable quality and the good barrier properties with respect to the gas and may be used for packaging, in particular, for the food products.

EFFECT: the invention ensures the manufacture of the barrier substance with the stable quality and the good barrier properties with respect to the gas and may be used for packaging, in particular, for the food products.

12 cl, 5 dwg, 4 tbl, 3 ex

FIELD: laminated material for manufacture of packaging containers by folding and thermal sealing and packaging containers for liquid food products manufactured from said material.

SUBSTANCE: packaging material 10 has central layer 11 of paper or cardboard and layer 12 of polyolefin with mineral filler on one side of central layer. Layer 12 with mineral filler has thickness of from 30 micron to 100 micron and has mineral particles in an amount of from 40% to 70% by weight of layer 12 with mineral filler. Both sides of central layer are provided with water-impermeable coating of polyolefin.

EFFECT: increased rigidity and provision for manufacture of containers with improved capturing properties.

8 cl, 4 dwg

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