JPH024713B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a resin processing method for textile products such as yarn, woven fabrics, and knitted fabrics. More specifically, we use specific polyester resins to provide durable texture improvement, shrink-proofing, shaping, hard finishing, anti-pilling, anti-slip, etc. to various fiber products such as synthetic fibers, chemical fibers, and natural fibers. This paper relates to a new resin processing method that uses an emulsified dispersion as a processing agent. Conventional methods for applying the above processing to textile products include:
Generally, water-soluble polymers such as PVA and polyacrylamide, water-soluble aminoplasts such as melamine resin and urea resin, vinyl acetate, acrylic resin emulsion, water-soluble or water-dispersible polyamide resins, epoxy resins, urethane resins, etc. are used. ing.
However, these finishing agents, for example, water-soluble polymer systems, have insufficient washing resistance, aminoplasts have problems with formaldehyde generation, and acrylic resin emulsions have stability problems, deteriorated durability due to emulsifiers, and dye friction. There is a problem of poor fastness, and resins such as polyamide, epoxy, urethane, etc. have a problem of discoloration and deterioration due to heat, sunlight, or chlorine adsorption. Ionic processing agents have poor compatibility with acids, alkalis, inorganic salts, and opposite ionic auxiliaries, making it difficult to select a processing agent based on the application and required performance in actual processing. In addition, these conventional processing agents are not necessarily satisfactory in terms of effectiveness. Under such circumstances, the present invention aims to research on a processing agent and processing method thereof that does not have the above-mentioned drawbacks, can form a strong film that is uniform and has good adhesion on the fiber surface, and has good durability and does not fall off when washed. As a result, we have arrived at the present invention. That is, the present invention is obtained from (A) an acid component containing 50 mol% or more of terephthalic acid and/or isophthalic acid in the total acid component, and (B) a glycol component that essentially contains polyethylene glycol with a molecular weight of 1000 to 6000. Treating textile products with an aqueous dispersion obtained by emulsifying and dispersing a polyester resin having a molecular weight of 1000 to 8000 and containing 5 to 15% by weight of the polyethylene glycol in the resulting resin in the presence of a water-soluble organic solvent. This invention relates to a resin processing method for textile products characterized by: According to the present invention, a uniform and tough film can be easily formed by the same method conventionally used for finishing textile products, that is, by dipping the textile product in a processing bath using the polyester resin, squeezing the liquid, and drying it. It has been found that it can be formed on the fiber surface to impart effects such as durable shrink-proofing, shaping, hard finishing, improved hand, anti-pilling, and anti-slip properties. Furthermore, the resin-processed product thus obtained was stable against sunlight, heat, nitrogen oxide gas, and chlorine, and did not discolor or deteriorate. In addition, by forming a polyester resin film, non-polyester fiber products can also be dyed with disperse dyes, making it possible to apply them to transfer printing, etc. The method of the present invention can be applied to textile products such as cotton, hemp, viscose rayon, cuprammonium rayon, cellulose fibers such as polynosik, wool, protein fibers such as silk, semi-synthetic fibers such as cellulose acetate, polyamide, polyacrylic fibers, etc. It is effective for all kinds of textile products such as synthetic fibers such as polyester, polyurethane, and yarns, woven fabrics, knitted fabrics, nonwoven fabrics, spunbond fabrics, etc. made of synthetic fibers such as polyester, polyurethane, and mixtures thereof.
In addition, it has been found that polyester, polyamide, polyacrylic fibers, etc., which have conventionally been difficult to process due to lack of functional groups, can be more effectively processed with resin. The polyester resin used in the present invention is an aromatic polyester obtained from an acid component containing 50 mol% or more of terephthalic acid and/or isophthalic acid in the total acid component. Polyester resins using acid components containing less than 50 mol% of terephthalic acid and/or isophthalic acid have insufficient physical properties and poor processing effects, and are particularly poor in water resistance, causing hydrolytic deterioration in the aqueous dispersion or after processing. Easy to accept and undesirable. The acid components other than terephthalic acid and isophthalic acid are not particularly limited, and any acid component can be used. These include, for example, succinic acid, maleic acid,
Aliphatic dicarboxylic acids such as adipic acid, azelaic acid, and sebacic acid; aromatic polycarboxylic acids such as orthophthalic acid, trimellitic acid, pyromellitic acid, and naphthalene dicarboxylic acid, and their nuclear hydrogen additives; and parahydroxyethoxybenzoic acid. The use of oxyacids such as acids is also not limited. Any glycol can be used as the glycol component, but one component has a molecular weight of 1000 to 6000, preferably
2000 to 5000 polyethylene glycol is an essential component, and it is necessary that this is contained in the polyester resin in an amount of 5 to 15% by weight, preferably 6 to 12% by weight. Polyethylene glycol with a molecular weight of 1000 to 6000 is an essential component for making the polyester resin aqueous in the present invention, and if it is less than 5%, it is difficult to obtain the polyester resin as a stable aqueous dispersion; If it exceeds this amount, the hydrophilicity becomes too large and the washing resistance decreases, and the dyeing fastness to rubbing of the processed product deteriorates, which is not preferable. There are no restrictions on other glycol components, and all glycols conventionally used in polyester resins may be used. For example, ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, 1,6
-hexanediol, neopentyl glycol,
Aliphatic glycols such as polypropylene glycol, 1,4-cyclohexane glycol, 1,4
-Aromatic glycols such as cyclohexanedimethanol, alicyclic glycols such as hydrogenated bisphenol A, 1,4-dihydroxyethoxybenzene, and ethylene oxide or propylene oxide adducts of bisphenol A. In particular, alicyclic glycols and aromatic glycols are preferred raw materials for improving the water resistance of polyester resins.
Further, polyfunctional glycols such as glycerin, trimethylolethane, and pentaerythritol may also be used. In addition, the polyester resin used in the present invention is
It has a molecular weight of 1,000 to 8,000, preferably 3,000 to 8,000. If the molecular weight is less than 1,000, it is undesirable due to low water resistance and strength, while if it is higher than 8,000, although it is preferable from a physical standpoint, it is difficult to make it water-soluble and is not practical. Synthesis of such a polyester resin can be carried out in accordance with a well-known and commonly used method.
That is, in the presence or absence of a catalyst in an inert gas, the above-mentioned acid component and glycol component were mixed at 160 to 270%
It can be obtained by heating to 0.degree. C. to carry out an esterification reaction or transesterification reaction, and then polycondensing it under normal pressure or reduced pressure. As the axial medium, metal oxides such as barium oxide, antimony oxide, zinc acetate, manganese acetate, cobalt acetate, zinc succinate, calcium silicate, dibutyltin oxide, tetrabutyl titanate, magnesium methoxide, or sodium methoxide, Organometallic compounds are used. In addition, it is generally preferable for the obtained polyester resin to have a low acid value, but in the present invention, if the acid value is high, the aqueous dispersion may become acidic and the stability may decrease; When mixed, the polyester resin becomes anionic, which deteriorates the compatibility with other drugs in the dispersion, which is not preferable. Therefore, polyester resins having an acid value of 5 or less are preferred. The polyester resin used in the present invention is used as an aqueous dispersion, but it is difficult to emulsify and disperse it directly in water, so in the present invention, a water-soluble organic solvent is used to make the dispersion. . That is, the polyester resin is appropriately diluted with a water-soluble organic solvent and then mixed with water or hot water to form a dispersion. Examples of such water-soluble organic solvents include methanol, ethanol, isopropanol, acetone,
Tetrahydrofuran, dioxane, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monoethyl ether, ethoxyethyl acetate,
Water-soluble alcohols such as dimethylformamide,
There are ketones, ethers, esters, and amides, and these can be arbitrarily selected and used. In some cases, this organic solvent may be removed by distillation or the like after emulsifying and dispersing the polyester resin, but in most cases it is used as it is contained in the aqueous dispersion to the extent that no problem occurs. For this reason, the amount of organic solvent should be kept to the minimum necessary limit. Generally, it is used within 50% by weight based on the polyester resin. The polyester resin dispersion of the present invention obtained in this way has very fine particles and good stability, and can form a uniform film with excellent adhesion on the fiber surface. It is also possible to form a dispersion of the polyester resin using an external emulsifier, but this is not preferred as it is accompanied by the drawbacks of the emulsifier and defeats the purpose of the present invention. However, it is possible to use a small amount of a nonionic emulsifier as long as the color fastness to rubbing is not deteriorated. Since the polyester resin dispersion used in the present invention does not have ionic properties, it is not compatible with inorganic salt catalysts during resin processing of cellulose fibers, ionic emulsions, softeners, water repellents, etc. It also has good stability and is not affected by pH, making it excellent for use in combination with these. Moreover, such polyester resins can be obtained from hard to relatively soft depending on the selection of composition, and hard polyester resins are used for hard finishing such as interlining and canvas, and anti-pilling finishing. A relatively soft polyester resin is selected for anti-slip processing. In addition, the polyester resin of the present invention is a colloidal dispersion of extremely fine particles due to the presence of a water-soluble organic solvent, so it can be uniformly and continuously adhered to fibers, further enhancing its effectiveness and durability. Excellent in sex. When treating textile products using this polyester resin, it is diluted appropriately depending on the purpose of processing, the resin bath is adjusted, and conventional immersion, squeezing, drying, and heat treatment are performed. Further, the treatment can be carried out by a spray method or a foam processing method, and a treatment by an exhaustion method at high temperature can also be carried out alone or in the presence of an activator having a low clouding point. In the present invention, an aminoplast, an epoxy compound, an aziridine compound, etc. can be used in combination as a crosslinking agent in order to further enhance the effects of the present invention. In addition, in order to obtain a composite effect, softeners, strength reduction preventive agents, and
A water repellent, a hand control agent, an antistatic agent, a penetrating agent, a fluorescent dye, a glyoxal resin in cellulose fiber processing, an aminoplast, a catalyst, etc. can be used at the same time as desired. EXAMPLES Next, the present invention will be specifically explained using Examples and Reference Examples, but the present invention is not limited to these. "Parts" and "%" shown in Examples and Reference Examples below are based on weight. Reference Examples 1, 2, 3, 4 (Synthesis of polyester resin dispersion) The polyester resin dispersion of the present invention was obtained by reacting with the composition shown in Table 1. Charge the acid component and glycol component into a reaction vessel, add 0.05% zinc acetate to the total charge as a catalyst, raise the temperature to 170℃ under a nitrogen stream to start the esterification reaction, and gradually raise the temperature to 220℃. Polyester resin was obtained by polymerization at this temperature. Next, a certain amount of these polyester resins was mixed with a water-soluble organic solvent, and then water was gradually added at 70 to 80°C to effect phase inversion emulsification to obtain a dispersion. All of the dispersions were colloid-like dispersions with a somewhat transparent feel, and remained stable with no change in state even after 6 months had passed.

[Table] Example 1 Using the polyester resin dispersion of Reference Example 1,
A 100% polyester interlining fabric and a polyester/cotton = 65/35 blend interlining fabric were compared with a conventional resin finishing agent and hard finishing was performed under the following conditions. The results are shown in Table-2. Processing conditions Resin composition: Mix resin liquid as shown in Table 2 Impregnation: 1 dip, 1 nip Squeezing ratio: 100% polyester cloth 50% polyester/cotton blend fabric 65% Drying: 100℃ x 2 minutes Baking: 150℃ x 3 minutes test Method Washing conditions: JIS L-0217 103 method, 5 times Bending resistance: Handrometer method (g) Slit width 20mm Texture: Determined by touch ◎...Very good 〇...Slightly good △...Slightly inferior ×...Poor

[Table] Bending resistance after washing - Bending resistance after washing original fabric *2)

Claims (1)

[Scope of Claims] 1 (A) an acid component containing 50 mol% or more of terephthalic acid and/or isophthalic acid in the total acid component, and (B) a glycol component that essentially includes polyethylene glycol with a molecular weight of 1000 to 6000. Textile products are manufactured using an aqueous dispersion obtained by emulsifying and dispersing a polyester resin having a molecular weight of 1,000 to 8,000 and containing 5 to 15% by weight of the polyethylene glycol in the resulting polyester resin in the presence of a water-soluble organic solvent. A resin processing method for textile products characterized by processing.