Monocysteine binder for fibrous materials

 

(57) Abstract:

The invention relates to dispersible in water material, which can be used as wipes. Water-soluble composition and its variants represent a single leaf containing from 25 to 85 wt. % trimer of an unsaturated carboxylic acid or ester of unsaturated carboxylic acid and from about 15 to 75 wt.% hydrophilic polymer, and the specified water-soluble composition is soluble in water, having a concentration of divalent ions less than about 50 ppm and the concentration of monovalent ions is approximately less than 0.4 wt.%. Also described is capable of dispersion in water of the fibrous non-woven material and its variants, comprising a fibrous substrate and a water-soluble binder. The method of obtaining capable of dispersion in water of non-woven material includes a step of contacting the fibrous substrate with an effective amount of water-soluble binder to bind the principal amount of the fibers in the substrate and the stage of drying the fibrous substrate. The invention allows to improve the softness and flexibility wipes, simultaneously improving strength, took Z. p. f-crystals.

The invention relates to dispersible in water material, the solubility of which in water depends on the total concentration of ions in water and, in particular, on the concentration of divalent ions. More specifically, the invention relates to polymeric binder capable of dispersion in water when the concentration of divalent ions in water is approximately less than 50 parts per million (hereinafter "h/m") and preferably the concentration of monovalent ions is approximately less than 0.4. %. Preferably, the polymer composition is insoluble in an aqueous solution having a concentration of divalent ions in excess of about 50 hours/million in Addition, the invention relates to a method for producing a dispersible in water non-woven fibrous material comprising a fibrous substrate and distributed in her composition injusticeinla binder, and the use of dispersible in water non-woven fibrous material dispersible in water products for personal hygiene.

Although the composition and products according to the present invention are described in it mainly in connection with the preferred applications of cachestate, it should be understood that the present invention is not limited to these applications. In light of the disclosure of the present invention, the experts in this field will find it has many applications in other areas where the ability of the fibrous material to be washed off with water would be highly desirable.

Non-woven fibrous material and fabric are widely used as components of disposable products such as sanitary napkins, diapers, dressings for wounds, bandages, pads, nursing and pre-moistened wipes. The terms "nonwoven fibrous web", "fibrous web", "nonwoven fabrics", textile and fibrous substrate used in the present description are interchangeable and include, without limitation, methods of manufacture of specified materials and cloths, which may include, without limitation, methods of air-laying, wet-laying.

Such non-woven materials for their effective functioning should retain its structural integrity, as well as to demonstrate satisfactory tensile strength in damp or wet. However, it was found that, if such non-woven materials under wadeye in water, problems of waste disposal associated with the use of such materials, largely fall away. Products could easily and conveniently be washed off in a conventional toilet or meters.

Preferably, the nonwoven had a number of characteristics, such as softness and flexibility. Typically, the nonwoven material is formed by wet or air-laying disordered fibers and their mutual alignment with the formation of a continuous web. In an attempt to inform non-woven material characteristics that are specific to their use, in the same ways tried to make these materials are incapable of dispersing in water. For example, nonwoven materials connected with insoluble in the liquid resin, which gave them the strength you are using. However, such resin, making nonwoven materials are substantially insoluble in water, prevent erosion them and thus eliminating waste.

Specific problems arise with pre-moistened wipes. Wipes used to clean skin and commercially known as small towels, wet wipes or feminine napkins made of paper or non-woven fibrous p is giving what the tensile strength of the fabric is not lost when storing it in the appropriate liquid medium. However, it is necessary that after using the wipes for the appointment of the bonding strength of the binder with the fibers easily weakened under the influence of the water environment, such as flushing wipes in the toilet, so as not to cause clogging sewage.

In order to give the napkins properties of the dispersive ability of the pigment in the water when they use different binders. For example, napkins include as a binder insoluble in acid, but soluble in alkali polymeric polycarboxylic acid and its functional derivatives, and the acid is placed in water and add sufficient alkali to basically neutralize all of the acid groups before the binder is applied to the canvas. Cloth, saturated binder, dried, and then immersed in an environment with a low pH value, where the cloth retains its structural integrity, but then, when immersing the tissue in a liquid medium with a sufficiently high pH canvas will disintegrate.

Others used the binder is polyvinyl alcohol mixed with a gelling or telling the insolubility agent such as borax. Borax promotes crosslinking, at IU the VA. Such cross-links are reversible, i.e., when the concentration of borax is reduced below a certain level, the degree of cross-linking becomes so low that the binder becomes soluble in water.

The problem with the above-mentioned binder is that to prevent the disintegration of the non-woven fibrous material before it is eliminated as waste, the cloth must be kept in solution with pH, which can cause skin irritation when using wipes.

Other binders, i.e., to a certain extent water-soluble binder is a copolymer of unsaturated carboxylic acid/ester of unsaturated carboxylic acid. The canvas is water-soluble, capable of dispergirujutsja in water or capable of disintegrating in water and the aquatic environment, provided that the water mainly contains divalent ions. However, in those areas where the water is "moderately hard", because it contains divalent ions such as calcium ions and/or magnesium ions, napkins disperse easily. Water-soluble polymeric binder is substantially insoluble in the presence of these divalent ions. Not wanting pryderi which indicate the irreversible cross-links in a binder, preventing its dispersion in water. So far not aware of the harmful influence of divalent ions present in the aquatic environment, have on the solubility of the polymer binder.

The problem with the above binder, is that they require a relatively long contact time required for the solution in which they are stored, wet fibrous material during high-speed conversion process. This limits the commercial usefulness of the binder in the sense of using it in a damp cloth.

Another problem with the above-mentioned binder is that it does not have sufficient strength in its final consumer use as napkins.

In accordance with the above, there is a need in the composition of the water-soluble binder, which can be used in a product, such as, for example, cloth is safe for its application and is practically not affected by divalent ions normally present in moderately hard water.

Briefly, the present invention relates to compositions of water-soluble polymer storestring polymeric binder comprises a trimer of an unsaturated carboxylic acid/esters of unsaturated carboxylic acids, inhibitor of divalent ions and hydrophilic capable of crosslinking the polymer. In a preferred embodiment of the invention the hydrophilic capable of crosslinking the polymer can function as an inhibitor of divalent ions and replace it last. Composition of water-soluble polymeric binder contains from about 25 to 85% (wt.) trimer of an unsaturated carboxylic acid/esters of unsaturated carboxylic acids, from about 5 to 35% (wt.) inhibitor of divalent ions and from about 10 to 60% (wt.) hydrophilic capable of crosslinking of the polymer. In the context of the present invention, the term "inhibitor of divalent ions" refers to any substance that inhibited due to the presence of divalent ions irreversible crosslinking the neutralized cryokinetic links in the native trimer. In a preferred embodiment of the invention the hydrophilic capable of crosslinking the polymer functions mainly as an inhibitor of divalent ions, so that the binder composition contains from about 25 to 85% (wt.) As.) hydrophilic, capable of crosslinking of the polymer.

Preferably, the binder composition according to the invention is soluble in water, having a concentration of divalent ions of less than approximately 50 hours per million and the concentration of monovalent ions less than about 0.4 wt.%.

Another aspect of the invention is a nonwoven fibrous material capable of dispersing in water. Nonwoven fibrous material contains a fibrous substrate and a water-soluble binder, distributed in the fibrous substrate for binding together the fibers of the fibrous material. Nonwoven fibrous material capable of dispersion in water having a concentration of divalent ions of less than approximately 50 hours per million and the concentration of monovalent ions less than about 0.4 wt.%.

Another aspect of the invention is a method of obtaining capable of dispersion in water of non-woven fibrous material. The method involves the step of contacting the fibrous substrate with an effective amount of the above water-soluble binder composition for binding a significant number of fibers and the stage of the drying material.

the camping in soft to moderately hard water, but insoluble in water, having a concentration of divalent ions above about 50 hours /million In the context of the present invention, the term "moderately hard water" refers to water having a total concentration of divalent ions from approximately 25 to 50 hours/million non-restrictive examples of the divalent ions include ions of calcium and/or magnesium. In the context of the present invention "soft water" refers to water having a concentration of divalent ions less than about 25 hours/million, and "very hard water" is water having a concentration of divalent ions above about 50 hours/million

Another objective of the invention to provide a nonwoven material that is capable of dispersing in a soft and moderately hard water having a concentration of divalent ions less than about 50 hours/million

Another object of the invention is the production of pre-moistened wipes that can easily dispergirujutsja soft and moderately hard water.

Another object of the invention is the production of napkins, allowing her the supplies to the standard sewer or septic system, capable of dispersion in water and not clogging water-closet or system is received in accordance with the present invention, have a high ultimate tensile strength in the dry state, depending, inter alia, on the amount of binder applied to the material, and method of its application. The nonwoven material has a wear resistance abrasive resistance and retains a significant tensile strength in aqueous solutions containing more than 50 hours per million divalent ions. However, non-woven material capable of dispersing in soft to moderately hard water. Due to this last property, proposed according to the present invention, the nonwoven materials are well suited for the production of single items of consumption such as sanitary napkins, diapers, and dry and pre-moistened wipes, which can be flushed down the toilet after use.

A binder according to the present invention provides a mechanical decomposition of the tissues after flushing the toilet, as in tap water, the strength of bonding between the binder and the fibers attenuated and preferably is lost. However, the binder has a significant strength of the intermolecular coupling, in order to keep fiber non-woven fabric together during storage and during use. ACC is siteline from 25 to 85 wt.% trimer of an unsaturated carboxylic acid/esters of unsaturated carboxylic acids, from about 5 to 35 wt.% inhibitor of divalent ions and from about 10 to 70 wt.% hydrophilic capable of crosslinking of the polymer. Preferably, the water soluble binder composition contains from about 40 to 75 wt.% trimer of an unsaturated carboxylic acid/esters of unsaturated carboxylic acids, from about 5 to 20 wt.% inhibitor of divalent ions and from about 10 to 50 wt.% hydrophilic capable of crosslinking of the polymer.

In a preferred embodiment of the invention the hydrophilic capable of crosslinking the polymer mainly functions as an inhibitor of divalent ions, thereby eliminating the necessity of using a self-inhibitor of divalent ions. Seems to be a very valuable thing hydrophilic capable of crosslinking the polymer increases the hydrophilicity of the treated material. In accordance with this hydrophilic capable of crosslinking the polymer contains from about 25 to 85 wt.% trimer of an unsaturated carboxylic acid/esters of unsaturated carboxylic acids and from about 15 to 75 wt.% hydrophidian from about 40 to 75 wt.% trimer of an unsaturated carboxylic acid/esters of unsaturated carboxylic acids and from about 25 to 60 wt.% hydrophilic, capable of crosslinking of the polymer.

The advantage is that the binder composition according to the invention is soluble in water, having a concentration of divalent ions of less than approximately 50 hours per million and the concentration of monovalent ions less than about 0.4 wt.%.

Although as a Monomeric component of the trimer can be used conventional unsaturated carboxylic acid, preferably acrylic acid and/or methacrylic acid. Examples of esters of unsaturated carboxylic acids as Monomeric components include acrylic esters and/or methacrylic esters having an alkyl group of 1-18 carbon atoms or cycloalkyl group of 3-18 carbon atoms; preferably, individually or in combination it completes applied acrylic esters and/or methacrylic esters having an alkyl group of 1-12 carbon atoms or cycloalkyl group of 3-12 carbon atoms.

More specifically, examples of trimers include copolymers 10-90 wt.%, preferably 20-70 wt.% acrylic acid and/or methacrylic acid and 90-10 wt.%, preferably 80-30 wt.% acrylic esters and/or methacrylic esters having alkyl grappino from 5 to 50 mol.% acrylic acid and/or methacrylic acid neutralized by salt formation; or copolymers 30-75 wt.%, preferably 40-65 wt.% acrylic acid, 5-30 wt.%, preferably 10-25% acrylic esters and/or methacrylic esters having an alkyl group of 8 to 12 carbon atoms, and 20-40 wt.%, preferably 25-35 wt.% acrylic esters and/or methacrylic esters having an alkyl group of 2-4 carbon atoms, in which from 1 to 50 mol.%, preferably from 2 to 40 mol.% acrylic acid neutralized with formation of salts. The molecular mass of the trimer is not specifically limited, although the mass-average molecular mass of the trimer is preferably from 5000 to 1000000, more preferably from 30,000 to 500,000.

As a neutralizing means for neutralizing the unsaturated carboxilate component of the copolymer may be optionally used any inorganic or organic base. Examples of the neutralizing means include inorganic bases such as sodium hydroxide, potassium hydroxide, lithium hydroxide and sodium carbonate, and amines, such as monoethanolamine, diethanolamine, Diethylaminoethanol, ammonia, trimethylamine, triethylamine, tripolian, morpholine. Preferred ethanolamines or sodium hydroxide, or a combination of potassium hydroxide with ethanolamines. Copolymere "degradable in water non-woven material", the full content of which is incorporated into this description by reference. The trimer is sold by the firm LION Corporation, Tokyo, Japan.

Inhibitors of divalent ions used in the present invention include from sulphonated sobolifera, such as EASTMAN AQ29D, AQ38D and AQ55D (sold by the company Eastman Chemicals, Kingsport, Tennessee); L9158 (sold by the firm ATO Findley); capable of crosslinking poly(ethylene vinyl acetate) (sold by the company National Starch and Chemical Company, Bridgewater, new Jersey, under the trade name ELITE-33); polyphosphates such as sodium tripolyphosphate; phosphinic acids, such as ethylenediaminetetra(methylenephosphonate acid); aminocarbonyl acid, such as ethylenediaminetetra acid, nitrilotriacetic acid; hydroxycarbonate acid, such as citric acid; and polyamine, such as portosin.

Suitable for use in the present invention the hydrophilic polymer capable of crosslinking include polymers having one or more hydrophilic monomers and a monomer that can form cross-links. Non-restrictive examples of such polymers include: 1) poly(ethylene vinyl acetate) with N-substituted acrylamide is service to crosslinking, such as N-methylolacrylamide; 3) spoliarium, such as hydroxyethylmethacrylate or poly(ethylene glycol) methacrylate (PEG-MA), methyl methacrylate or methyl acrylate; 4) poly(ethylene vinyl alcohol) having less than approximately 3% of hydrolize bathrooms links; and 5) poly(ethylene glycol) grafted with other polymers, such as polyolefins, resulting polietilenglikolya part of the molecule can form cross-links. The preferred polymer capable of crosslinking, is poly(ethylene vinyl acetate) N-methylolacrylamide sold by National Starch and Chemical Company, Bridgewater, new Jersey, under the trade name ELITE-33.

In another embodiment of the invention, the binder formulations can be applied to any fibrous substrate with formation capable of dispersion in water of the fibrous material. Dispersible in water nonwoven material according to the present invention is soluble, i.e., capable of disintegrants or dispergirujutsja in an aqueous environment having a concentration of divalent ions of less than approximately 50 hours per million and the concentration of monovalent ions less than about 0.4 wt.% Dispersible in water material according to the e fibrous substrates include, but not limited to, non-woven and woven materials. In many embodiments of the invention, in particular in personal hygiene, the preferred substrates are non-woven materials because of their ability to absorb fluid, such as blood, menstrual fluid and urine. In the context of the present invention under "nonwoven material" refers to material having the structure of distributed randomly individual fibers or filament yarn, which can be connected to each other like a canvas. Non-woven materials can be obtained in numerous ways, which include, but are not limited to, aerial installation, the process of wet laying processes hydropyridine, carding staple fibers, binding and spinning from solution.

The binder compositions are suitable, in particular, to bind the fibers upon receipt of nonwovens using aerial installation. These materials are particularly suitable for the manufacture of body gaskets, materials for distribution of liquids, absorbent materials such as dressings, absorbent tissue sheets and wrapping material for various dis is a pre-moistened wipes. Mass per unit area of nonwoven fabrics obtained by using aerial installation, varies from approximately 20 to 200 g/m2when the thickness of the staple fiber 2-3 denier and a length of about 6-15 mm. with regard to surgical or absorbent materials, they require better flexibility and higher fluffiness, so for the manufacture of such items are staple fibers having a thickness of about 6 denier. The optimal final density dressing or absorbent material is in the range from about 0.025 to 0,050 g/cm3. Materials for liquid distribution should have a higher density, which is optimally in the range of approximately 0.10 to 0.20 g/cm3with the use of fibers with lower values denier; it is most preferable to use a fiber thickness of one denier or less than 1.5 denier. Napkins, typically have a density from about 0.05 to 0.1 g/cm3and the weight per unit area in the range of approximately 60 to 90 g/cm2.

Itself non-woven material can be formed from natural fibers, synthetic fibers and combinations thereof. The choice of fibers depends,right fibers, which can be used individually or in combination for the formation of substrates include cotton, linen, jute, wool fibers, fibers from wood pulp, fibers of regenerated cellulose, such as viscose silk, modified cellulose fibers, such as cellulose acetate fiber, or synthetic fiber derived from polyvinyl alcohol, polyesters, polyamides, high, etc. If desired, can also be used mixtures of one or more of these fibers.

Towel nonwoven material, preferably derived from relatively short fibers, such as fibers of wood pulp. The minimum length of the fibers depends on the method selected for forming non-woven material. In the manufacture of nonwoven material is wet or dry fiber length is chosen preferably in the range of about from 0.1 to 15 mm, it Was found that, when washed material contains a significant amount of fibers, having a length of more than 15 mm, their length tends to form ropes of fibers, which may be undesirable in washable material. Preferably, the nonwoven material according to the present invention in t the strength of adhesion in the wet state. If fibers such nonwoven material joined with an adhesive which loses its adhesive strength in water and waste water, non-woven material can be easily destroyed by mechanical mixing when flushing it in the toilet and the movement of sewer pipelines.

Non-woven material according to the present invention can be molded in one or more layers. In the case of multilayer fabrication layers are usually stacked on top of each other, respectively, surface to surface, and all or part of the layers may be associated with the neighboring layers. Non-woven material can also be made from many individual non-woven materials, and these separate non-woven materials can be molded in one or more layers. A binder may be distributed on a non-woven material by means of a single application or, if the material consists of several layers, each layer can be individually coated with a binder and then connected to other layers by blending layers to each other with the formation of the thus prepared non-woven material.

The binder composition may be applied to the nonwoven material by any known itia or in any other way. To preserve the integrity of non-woven material when applied to him binder should be evenly spanning almost all the material to cover basically all the places of crossing fibers. Preferably the binder is distributed in the nonwoven material so that it was covered with approximately 80 to 100 percent of the places of crossing fibers. More preferably the binder is distributed in the nonwoven material so that it was covered with from about 95 to 100 percent of the places of crossing fibers.

Another aspect of the invention is a method of obtaining dispersible in water nonwoven material. The method involves the step of contacting the fibrous substrate with an effective amount of a binder according to the present invention for linking the main quantity of the fibres and the subsequent stage of drying nonwoven material for education capable of dispersion in water of the fibrous material. To facilitate its application to the nonwoven binder material may be emulsified, dispersed and/or dissolved in water or in a solvent such as methanol, ethanol or the like, and water is the preferred carrier. A binder may soybeans by weight of the nonwoven material binder may be distributed non-woven material or added thereto in the amount of approximately from 1 to 50 wt.%, preferably from 5 to 30 wt.% and more preferably from 8 to 25 wt. %. When the amount of the binder is less than that specified above, the resulting non-woven material has insufficient mechanical strength. On the other hand, if the amount of the binder exceeds the above amount, the resulting non-woven material has a high softness and good quality to the touch.

The binder composition may contain plasticizers, such as glycerin; sorbitol; emulsified mineral oil; esters of benzoic acid; polyglycols, such as polyethylene glycol, polypropyleneglycol, and their copolymers: decanoyl-N-methylglucamide; tributaries and tributoxyethyl added to the solution containing a binder, but this is not preferred.

The amount of plasticizer depends on the specified soft nonwoven material, but, as a rule, the plasticizer may be added in amounts from 0 to about 10 wt.% in terms of the mass of material.

In the junction can be optionally entered flavorings, colorants, antifoams, bactericides, antiseptics, surfactants, thickeners, fillers, and when necessary the of chloride, polyacrylates, polymethacrylates, copolymers of acrylates and methacrylates, polymers of acrylic acid, methacrylic acid or their salts and carboxymethylcellulose.

After applying the binder composition of non-woven material is dried by any known means, such as, for example, air drying furnace continuous action. After drying cohesion-associated non-woven fibrous material has a high tensile strength in comparison with the tensile strength is similar, but not processed material obtained by way of air or wet laying. For example, the tensile strength of the material can be increased by at least 25% in comparison with the tensile strength of the raw material. In particular, the tensile strength of the material can be increased not less than 100%, and more specifically not less than 500%, compared to the tensile strength of the raw material. However, it is an advantage of the invention, the material will disintegrate or able to disintegrate when placed in soft or moderately hard cold water and stirring. In the context of the present invention, the terms "disintegrants", "drop", "the adeniya or split into multiple pieces of material, when the material after it stay for approximately 90 minutes in tap water is decomposed into many pieces, and each piece of material has an average size of less than 50%, preferably less than 40% and even more preferably less than 30% relative to its size prior to dispersion. Preferably, the material was dissolved after approximately 60 minutes in water, and more preferably, after 30 minutes.

Non-woven material suitable for transformation into a napkin or any other above-described object disposable, may be of any type used for such products. Ready wipes can be packaged individually, preferably in a folded state, in a sealed envelope or Packed in containers containing any desired number of pre-folded layers and stacked in waterproof packaging coated with a wetting agent. Moist cloth may contain a wetting agent. In terms of the mass of dry material content of the wetting agent in the tissue may be from about 10 to 400%, preferably from 100 to 300%. The napkin should keep their defined characte storage by the consumer. Consequently, the shelf life of napkins must be from two months to two years.

The prior art various forms of waterproof envelopes for Packed when wet materials, such as napkins, handkerchiefs and the like. Any of them can be used for the package of pre-moistened wipes, proposed according to the present invention.

Non-woven material according to the present invention can be incorporated into products that absorb body fluids, such as sanitary napkins, diapers, surgical dressings, fabrics and the like. Feature binding is that it does not dissolve when in contact with these fluids, if the concentration of divalent ions in the liquid exceeds the level of solubility. Non-woven material keeps its structure and softness and has a sufficient strength for practical use. However, upon contact with water having a concentration of divalent ions to approximately 50 hours /million, binder decomposes. In this case, the structure of non-woven material easily breaks down and dissolves in water.

The present invention is illustrated in niamat solution of the binder, containing by 52.6 wt.% trimer of an unsaturated carboxylic acid/esters of unsaturated carboxylic acids (sold by the firm LION Corporation, Tokyo, Japan under the trade name SSB-3b); 42,8% by weight Code L9158 (sold by the firm ATO Findley, Wauwatosa, Wisconsin) as an inhibitor of divalent ions and 4.6 wt.% recrystallizes grade sorbitol (sold by the company Pfizer) as a plasticizer by dissolving the resin in water to obtain a solution containing about 13 wt.% solid substances.

On one side of a fibrous substrate obtained by the method of wet-laying non-woven material containing 60 wt.% polyethylene terephthalate (PET) staple fibers and 40 wt.% pulp Abaca fiber (sold by the firm Hanson & Orth, Wilmington, North Carolina), put dispersion prepared with the above composition in an amount of 20-25 wt.% in terms of dry weight of the substrate. The thus treated material is then dried in an air oven in injection mode at 105o(221oF) for 10 minutes. The material should be immersed for two minutes in a small dish containing 50 ml of test solution having a concentration of divalent ions (CA++) 100 hours/million sustainable Material in a test solution, but what about the saturated nonwoven material is determined using modified test procedures of ASTM-D5034-11 (1994). Saturated nonwoven material has a width of 25.4 mm and a length of 152 mm Method modify by using the device for tensile testing firm Sintech with the size of the lumen of the clamp 100 mm and speed of separation of the slide 30.5 cm per minute. The tensile strength of saturated material in the machine direction (MN) is 90 grams per 25.4 mm of width.

Example 1

Prepare a solution of a binder in accordance with the present invention containing (part 1): 50 wt.% trimer of an unsaturated carboxylic acid/esters of unsaturated carboxylic acids (sold by the firm LION Corporation, Tokyo, Japan under the trade name SSB-3b); 25 wt.% inhibitor of divalent ions (sold by Eastman Chemical company under the trade name AQ-29D) and 25 wt. % capable of crosslinking of poly(vinyl acetate) (sold by the company National Starch and Chemical Company, Bridgewater, new Jersey under the trade name ELITE-33). The composition is diluted to a total content of 13% solids. The composition is applied by spraying on one side of the substrate obtained by the method of wet-laying non-woven fabric described in comparative example 1. The thus treated material is then dried in an air oven in injection mode at 105o(221odown, having a concentration of divalent ions (CA++) 100 hours/million

The tensile strength of the saturated nonwoven material, determined in accordance with the procedure described in comparative example 1 is 280 grams per 25.4 mm of width. Material racks in a test solution, but decomposes in cold tap water after 50 minutes.

Comparative example 2

A solution of the binder of comparative example 1 was diluted with deionized water to a total solids content of 5.9 wt.%.

The composition of the binder in the amount of 20 wt.% in terms of the dry weight of the nonwoven material is applied by sputtering on both sides of the substrate prepared from the obtained by the method of wet-laying fibrous nonwoven material containing cellulose Weyerhaueser CF 405. The thus treated material has a total weight per unit area of 68 g/m2. The material is then dried in an oven at a temperature of 204,4o(400oF) for 10-15 seconds. In the material added in the amount of 185 wt.%, in terms of dry weight material, an aqueous solution containing 100 PM per million divalent ions of calcium.

The tensile strength of the saturated nonwoven material determined by the i.i.d. non-woven material is placed in the device Twinge-albert (Thwing-Albert) for the test strain. The tensile strength of saturated material in the transverse to the machine direction (MON) 185 g 76 ml width. The material is resistant in a test solution, but decomposes in cold tap water after approximately 15 minutes.

The wettability of the dry nonwoven material is determined as follows. Using a syringe with a volume of 10 cm3with needle 18-th size on the dry material is applied a drop of deionized water in eight arbitrary points. Record the time required for a drop of water penetrated through the material, and the average of the eight recorded values of time taken for wettability. Dry material absorbs a drop of deionized water for 3 minutes and 5 seconds.

Comparative example 3

A solution of the binder of comparative example 1 was diluted with deionized water to a total solids content of 5.9 wt.%.

The composition of the binder in the amount of 20 wt.%, in terms of dry weight of the substrate of fibrous non-woven material is applied by sputtering on both sides of the substrate containing cellulose Weyerhaueser CF 405. The thus treated material has a total weight per unit area 71 g/m2. The material is then dried in an oven etc is the dry mass of material, an aqueous solution containing 100 PM per million divalent ions of calcium.

The tensile strength of the saturated nonwoven material, determined in accordance with the procedure described in comparative example 2, 225 g 76 mm wide. The material is resistant in a test solution, but is decomposed in water for approximately 10 minutes.

Example 2

Prepare a solution of a binder according to the invention containing (part 2): 65,0 wt. % LION SSB-3b and to 35.0 wt.% ELITE-33. The composition is diluted to a total content of 15.0% solids. Approximately 25 wt.% solution of composition 2, calculated on the dry weight of the substrate, non-woven fabric is applied on a substrate of fibrous nonwoven material containing cellulose Weyerhaueser CF 405. The thus treated material has a total weight per unit area of 69 g/m2. The material is then dried in an oven at a temperature of 193.3 M.o(380oF) for 10-15 seconds. In the material added in the amount of 250 wt.%, in terms of dry weight material, an aqueous solution containing 100 PM per million divalent ions of calcium.

The tensile strength of the saturated nonwoven material, determined in accordance with the procedure described in comparative example 2, 700 g of nominal.

In accordance with the method of determining the wettability described in comparative example 2, the dry material absorbs a drop of deionized water on average for one minute and eight seconds.

Example 3

Prepare another solution of the binder according to the invention containing (part 3): 65,0 wt. % LION SSB-3b; 22.5 wt.% ELITE-33 and 12.5 wt.% AQ-29D (inhibitor of divalent ions). The composition is diluted to a total content of 15.5 wt.% solid substances. Approximately 25 wt.% mortar 3, calculated on the dry weight of the substrate, non-woven fabric is applied on a substrate of fibrous nonwoven material containing cellulose Weyerhaueser CF 405. The thus treated material has a total weight per unit area of 72 g/m2. The material is then dried at a temperature of 193.3 M.o(380oF) for 10-15 seconds. In the material added in the amount of 250 wt.%, in terms of dry weight material, an aqueous solution containing 100 PM per million divalent ions of calcium.

The tensile strength of the saturated nonwoven material, determined in accordance with the procedure described in comparative example 2, is 621 g 76 mm wide. The material is resistant in a test solution, but dissolves in water approximately less than che is as 2, dry material absorbs a drop of deionized water on average in less than ten seconds.

Example 4

Prepare another solution of the binder according to the invention containing (part 4): 39.5 wt.% LION SSB-3b, 32,1 wt.% inhibitor of divalent ions (L-9158, sold by the company ATO Findley), 25 wt.% poly(vinyl acetate) (ELITE-33) and 3.4 wt.% sorbitol as a plasticizer. The composition was diluted with deionized water to a total content of 7.8 wt.% solid substances. Approximately 20 wt. % solution of composition 4, calculated on the dry weight of the substrate, non-woven fabric is applied on a substrate of fibrous nonwoven material containing cellulose Weyerhaueser CF 405. The thus treated material has a total weight per unit area of 66 g/m2. The material is then dried in an oven at a temperature of 226.7o(440oF) for 10-15 seconds. In the material added in the amount of 186 wt.%, in terms of dry weight material, an aqueous solution containing 100 PM per million divalent ions of calcium.

The tensile strength of the saturated nonwoven material, determined in accordance with the procedure described in comparative example 2, is 587 g 76 mm wide. The material does not disintegrate in water due to excess kolichestvo with the method of determining the wettability, described in comparative example 2, the dry material absorbs a drop of deionized water on average for two minutes and 17 seconds.

Example 5

The method of the above example 4 is repeated except for the following differences. In the material added to the number 173 wt.%, in terms of dry weight material, an aqueous solution containing 100 PM per million divalent ions of calcium.

The tensile strength of the saturated nonwoven material, determined in accordance with the procedure described in comparative example 2, is 652 76 mm wide. The material does not disintegrate in water due to excessive cross-linking in the polymer, resulting from high temperature drying.

Example 6

Approximately 15 wt.% mortar 4, calculated on the dry weight of the substrate, non-woven fabric is applied on both sides of the substrate. The thus treated material has a total weight per unit area of 68 g/m2. The material is then dried at of 226.7o(440oF) for 10-15 seconds. In the material added to the number 226 wt. percent, calculated on the dry weight of the material, an aqueous solution containing 100 PM per million divalent ions of calcium.

The strength rastimer 2, 660 g 76 mm wide. The material is resistant in a test solution, but disintegrates in water in less than one hour.

In accordance with the method of determining the wettability described in comparative example 2, the dry material absorbs a drop of deionized water on average for one minute and 52 seconds.

Example 7

The method of the above example 4 is repeated except for the following differences. Approximately 10 wt.% mortar 4, calculated on the dry weight of the substrate of non-woven material is applied by sputtering on both sides of the substrate. The thus treated material has a total weight per unit area of 65 g/m2. The material is then dried at 204,4o(400oF) for 10-15 seconds. In the material added in the amount of 204 wt.%, in terms of dry weight material, an aqueous solution containing 100 PM per million divalent ions of calcium.

The tensile strength of the saturated nonwoven material, determined in accordance with the procedure described in comparative example 2, is 430 g 76 mm wide. The material is resistant in a test solution, but disintegrates in water in less than one hour.

For the person skilled in the art it is clear that the proposed is whether the limits of the patent claims, claimed in the claims. In accordance with this, the above description should be understood only as an example of the presentation of the preferred region of the present invention, but not as a limitation of the invention.

1. Water-soluble binder composition for binding a fibrous material in a single whole cloth, containing from about 25 to 85 wt.% trimer of an unsaturated carboxylic acid or ester of unsaturated carboxylic acid and from about 15 to 75 wt.% hydrophilic capable of crosslinking the polymer, and the specified water-soluble composition is soluble in water, having a concentration of divalent ions less than about 50 ppm and the concentration of monovalent ions is approximately less than 0.4 wt.%.

2. Composition middleware p. 1 containing from about 40 to 75 wt.% trimer of an unsaturated carboxylic acid or ester of unsaturated carboxylic acid and from about 25 to 60 wt.% hydrophilic capable of crosslinking of the polymer.

3. Water-soluble binder composition for binding a fibrous material in a single whole cloth, containing the acid, from about 5 to 35 wt.% inhibitor of divalent ions and from about 10 to 60 wt.% hydrophilic capable of crosslinking the polymer, and the specified water-soluble composition is soluble in water, having a concentration of divalent ions less than about 50 ppm, and the concentration of monovalent ions is approximately less than 0.4 wt.%.

4. Composition middleware p. 3 containing from about 40 to 75 wt. % trimer of an unsaturated carboxylic acid or ester of unsaturated carboxylic acid, from about 5 to 20 wt.% inhibitor of divalent ions and from about 10 to 50 wt.% hydrophilic capable of crosslinking of the polymer.

5. The composition of the binder under item 1 or 3, with the specified water-soluble binder composition is soluble in an aqueous medium containing less than about 25 ppm of divalent ion selected from calcium or magnesium.

6. The composition of the binder under item 1 or 3, in which the specified trimer of an unsaturated carboxylic acid or ester of unsaturated carboxylic acid contains from about 10 to 90 wt.% acrylic acid or methacrylic acid and from about 90 to 10 wt.% Agrippa from 3-18 carbon atoms, and from 2 to 60 mol.% repeating units derived from acrylic acid and/or methacrylic acid are in the form of salt.

7. The composition of the binder under item 1 or 3, in which the specified trimer of an unsaturated carboxylic acid or ester of unsaturated carboxylic acid contains from about 20 to 70 wt.% acrylic acid or methacrylic acid and from about 80 to 30 wt.% acrylic esters and/or methacrylic esters having an alkyl group of 1-18 carbon atoms or cycloalkyl group of 3-18 carbon atoms, and from 5 to 50 mol.% repeating units derived from acrylic acid and/or methacrylic acid are in the form of salt.

8. The composition of the binder under item 1 or 3, in which the specified trimer of an unsaturated carboxylic acid ester, unsaturated carboxylic acid contains from about 30 to 75 wt.% acrylic acid or methacrylic acid and from about 5 to 30 wt.% acrylic esters and/or methacrylic esters having an alkyl group of 1-18 carbon atoms, and from about 20 to 40 wt.% acrylic esters and/or methacrylic esters having an alkyl group of 2-4 carbon atoms, and from 1 to 50 mol.% recurring units derived oribiter divalent ions selected from the group consisting of from sulphonated of sobolifera, polyphosphate, phosphinic acid, aminocarbonyl acid, hydroxycarbonic acid, polyamine and capable of crosslinking of polyethylenterephtalate.

10. The composition of the binder under item 9, in which the specified inhibitor of divalent ions selected from the group consisting of from sulphonated of spoliation, such as EASTMAN AQ 29D, AQ38D and AQ55D, ATO Findley L9158, polyethylenterephtalate N-methylolacrylamide, sodium tripolyphosphate, nitrilotriacetic acid, citric acid, Atlantia-aminotetrazole acid, ethylenediaminetetra(methylenephosphonate acid) and porposing.

11. The composition of the binder under item 1 or 3, in which the specified hydrophilic capable of crosslinking a polymer selected from the group consisting of polyethylenterephtalate with N-substituted acrylamide, acrylamide, copolymers based on N-substituted acrylamide with a monomer capable of crosslinking, spoliarium, polietilenovogo alcohol having approximately less than 3% hydrolyzed links, polyethylene glycol grafted on another polyolefin, resulting polietilenglikolya part of the molecule can form a nicked the Torah specified hydrophilic, capable of crosslinking a polymer selected from the group consisting of N-methylolacrylamide, copolymer of hydroxyethylmethacrylate with methyl methacrylate, copolymer of hydroxyethylmethacrylate with methyl acrylate, copolymer of polietilenglikolsuktsinata (PEG-MA) with methyl methacrylate and copolymer of polyethylene glycol methacrylate (PEG-MA) with methyl acrylate.

13. Capable of dispersion in water of the fibrous non-woven material comprising a fibrous substrate and a water-soluble binder under item 1, distributed in the fibrous substrate, and the material capable of dispersion in water having a concentration of divalent ions less than about 50 ppm and the concentration of monovalent ions less than about 0.4 wt.%.

14. Capable of dispersing a fibrous non-woven material on p. 13, and the specified fibrous material formed from fibers selected from the group consisting of natural and synthetic fibers.

15. Capable of dispersing a fibrous non-woven material on p. 13, and the specified fibrous material capable of disintegrating in water approximately less than 90 minutes

16. Capable of dispersing fibers is Ino less than 60 minutes

17. Capable of dispersing a fibrous non-woven material on p. 13, and the specified fibrous material capable of disintegrating in water approximately less than 30 minutes

18. Capable of dispersing a fibrous non-woven material on PP.15, 16 or 17, with the specified fibrous material is divided into many pieces, each of which has an average size of less than about 50% relative to its size prior to dispersion.

19. Capable of dispersing a fibrous non-woven material under item 18, and the specified fibrous material is divided into many pieces, each of which has an average size of less than about 40% relative to its size prior to dispersion.

20. Capable of dispersing a fibrous non-woven material under item 18, and the specified fibrous material is divided into many pieces, each of which has an average size of less than about 30% relative to its size prior to dispersion.

21. Capable of dispersion in water of the fibrous non-woven material comprising a fibrous substrate and a water-soluble binder on p. 3, distributed in the fibrous substrate, and the material the way is Concentratio monovalent ions less than about 0.4 wt.%.

22. Capable of dispersing a fibrous non-woven material on p. 13 or 21, and a connecting distributed approximately 80-100% of the specified material.

23. Capable of dispersing a fibrous non-woven material on p. 13 or 21, and a connecting distributed approximately 95-100% of the specified material.

24. Capable of dispersing a fibrous non-woven material on p. 13 or 21, and the material has a wettability of less than about 15 minutes

25. Capable of dispersing a fibrous non-woven material on p. 13 or 21, and the material has a wettability of less than about 5 minutes

26. Capable of dispersing a fibrous non-woven material on p. 13 or 21, and the material has a wettability of less than about 1 min.

27. The method of obtaining capable of dispersion in water of nonwoven material, comprising a stage of contacting the fibrous substrate with an effective amount of water-soluble binder under item 1 for linking the main quantity of the fibers in the substrate and the stage of drying the fibrous substrate.

28. The method of obtaining capable of dispersion in water of non-woven material, including the I bind the principal amount of the fibers in the substrate and the stage of drying the fibrous substrate.

29. The method according to p. 27 or 28, in which from about 1 to 50 wt.%. the specified binder distributed on the specified material.

30. The method according to p. 29, in which from about 5 to 30 wt.% the specified binder distributed on the specified material.

31. The method according to p. 29, in which approximately 8 to 25 wt.% the specified binder distributed on the specified material.

 

Same patents:

The invention relates to resistant to the solvent connecting means used in the finishing of textile fabrics, the way they are received, as well as to a method for producing resistant to the solvent fibrous products using such resistant to the solvent binders

The invention relates to stapling powder mixture for connecting the means for textile materials, and the method of production associated with the polymer, textile molded or paintings using the mixture for connecting the means for textile materials

The invention relates to methods of producing non-woven fibrous materials of various types of fibers, bonded hypoproteinemia with subsequent impregnation of the binder that can be used for cladding mouldings available, for example, in the salons of automotive engineering

The invention relates to water-soluble lacquer binder and method of production thereof

The invention relates to a paint and varnish materials and can be used in mechanical engineering to protect metal surfaces operating at elevated temperatures, under conditions of high corrosiveness of the environment

The invention relates to thermosetting powder compositions for coatings

The invention relates to compositions for anti-corrosion coatings using copolymer-based bottoms V rectification styrene copolymer KORS), and is intended primarily for the protection of metal (including steel) structures operated in atmospheric conditions, as well as for protection of concrete and wooden structures exposed to weathering

The invention relates to a composition for the manufacture of materials such as artificial leather, in particular, for the impregnation of textile bases in the production of fancy material

The invention relates to medicine

The invention relates to medicine and medical technology and can be used in prosthetics and portretirovanii
The invention relates to the field of sanitation and hygiene and for personal hygiene products disposable

The invention relates to medicine, in particular to devices for cutting plaster bandages

The invention relates to a transmissive liquid covering sheet absorbing articles such as a diaper, a protective device from incontinence, a sanitary pad, etc
Up!