JPH0813334A - Non-formalin-processed cellulosic fiber and production thereof - Google Patents

Abstract

PURPOSE:To produce a non-formalin-treated cellulosic fiber having excellent resistance to wrinkling and shrinking by impregnating cellulosic fiber with a polycarboxylic acid and a carboxylic acid having a specific structure and heat-treating the impregnated fiber. CONSTITUTION:Cellulosic fibers are soaked in a solution containing at least one compound selected from (A) a polycarboxylic acid such as tricarballylic acid, aconitic acid, citric acid, malic acid, or butanetetracarboxylic acid, (B) B1: a hydroxyl-containing monocarboxylic acid selected from glycolic acid, lactic acid, gluconic acid, an omega-hydroxy-2-28C fatty acids, ricinoleic acid, B2: a tetracarboxylic acid of formula I (R is a 1-6C alkylene, cyclohexylene, phenylene, formula II or formula III), for example, edetic acid and B3: nitrilotriacetic acid, than heat-treated to give the objective fibers having improved resistance to wrinkling and shrinking. If the treating solution is formulated with a polyol and/or a silicone, the antishrinking properties of the knitted fabrics therefrom and, the wash-and-wear performance of the woven product are improved, and further, fabric hand becomes better with durability also increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cellulose fiber having anti-wrinkle effect and anti-shrink effect without the use of formalin and a method for producing the same.

[0002]

2. Description of the Related Art Cellulose fibers typified by cotton are widely used because of their many advantages such as hygroscopicity and touch. However, cellulose fibers have a drawback that wrinkles and shrinkage easily occur, and various treatment agents are used to overcome them.

Known examples of such treating agents include urea formalin resins and fibrin reactive resins containing epoxy compounds as active ingredients.

However, in the urea-formalin resin, which is a fibrin-reactive resin, and the glyoxal resin, which is a derivative thereof, the phenomenon in which formalin remains after processing is remarkable.
In addition to its peculiar odor, formalin is known as a carcinogenic substance, and not only the working environment in the fiber treatment process, but also the product may have an impact on consumers. , Regulations and self-restraint on the use of carcinogenic formalin and epoxy compounds tend to be strengthened.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an epoch-making non-form wrinkle-proof and shrink-proof cellulosic fiber which does not involve formalin and its derivatives, and a method for producing the same.

[0006]

Means for Solving the Problems The inventors of the present invention have made earnest studies to achieve the above-mentioned object, and as a result, a cellulose fiber impregnated with a polycarboxylic acid and a carboxylic acid having a specific structure and subjected to heat treatment has excellent protection. It has been found to develop wrinkle and shrink resistance. The present invention has been completed based on these findings.

The non-formalin cellulosic fiber according to the present invention comprises a cellulose fiber (a) a polycarboxylic acid and a (b) a hydroxyl group-containing monocarboxylic acid, represented by the general formula:

[0008]

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It is produced by impregnating with at least one carboxylic acid selected from the group consisting of tetracarboxylic acid and nitrilotriacetic acid represented by:

The cellulose fiber in the present invention means cotton, hemp, rayon and a mixed fiber containing these fibers. Cellulose fiber products refer to woven fabrics, knits, nonwoven fabrics and the like obtained by using the above-mentioned cellulose fibers as an essential material.

The polycarboxylic acids used as the component (a) in the present invention include various linear aliphatic polycarboxylic acids, branched aliphatic polycarboxylic acids, alicyclic aliphatic polycarboxylic acids, and aromatic compounds. Examples thereof include polycarboxylic acid, which may have a hydroxyl group, a halogen group, a carbonyl group, or a carbon-carbon double bond.

Specific examples of such polycarboxylic acids include linear aliphatic polycarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid and sebacic acid. Branched fatty acids of these polycarboxylic acids, unsaturated dibasic acids such as maleic acid and fumaric acid, alicyclic dibasic acids such as hexahydrophthalic acid, hexahydroisophthalic acid, hexahydroterephthalic acid, tetrahydrophthalic acid and nadic acid. , Tricarballylic acid, aconitic acid, tribasic acid such as methylcyclohexentricarboxylic acid, butanetetracarboxylic acid, cyclopentanetetracarboxylic acid, tetrahydrofuran tetracarboxylic acid, tetrabasic acid such as ene adduct of methyltetrahydrophthalic acid and maleic acid , Hydroxy fatty acids such as malic acid, tartaric acid and citric acid, o- m- or p- phthalic acid, trimellitic acid, pyromellitic acid, biphenyltetracarboxylic acid, benzophenonetetracarboxylic acid, and aromatic polycarboxylic acids such as diphenylsulfone tetracarboxylic acid.

Of these polycarboxylic acids, water-soluble carboxylic acids such as tricarballylic acid, aconitic acid, citric acid and butanetetracarboxylic acid are preferred because of their good workability, and particularly water-soluble and tetrabasic acids. The natural cellulose fiber using the butanetetracarboxylic acid is most excellent in the wrinkle-preventing effect and shrink-preventing effect of the present invention.

The amount of the above-mentioned polycarboxylic acids (a) to be used can be appropriately selected depending on the kind thereof, but is usually 0.1 to 50% by weight, preferably 0.5 to 20% by weight based on the cellulose fiber to be processed. Is. If it is less than this range, the anti-wrinkle effect and shrink-proof effect of the present invention are insufficient, and even if it is used in a large amount, the effect corresponding to the amount used cannot be obtained, which is not economical.

The carboxylic acids used as the component (b) in the present invention are a hydroxyl group-containing monocarboxylic acid, a tetracarboxylic acid represented by the above general formula (1) and nitrilotriacetic acid.

As the hydroxyl group-containing monocarboxylic acid, an aliphatic monocarboxylic acid having 2 to 18 carbon atoms and having at least one hydroxyl group is recommended, and more specifically, glycolic acid, lactic acid, gluconic acid, and 2 carbon atoms are recommended. Examples of free carboxylic acids such as .omega.-hydroxy fatty acids and ricinoleic acid of .about.18 can be mentioned.

Among these hydroxyl group-containing monocarboxylic acids, carboxylic acids that can be dissolved in an aqueous solution at an arbitrary ratio and do not volatilize by heating are preferable, and specific examples thereof include glycolic acid, lactic acid, and gluconic acid. it can. Lactic acid is a particularly preferred compound because it has the effect of increasing wrinkle resistance and shrinkage resistance to form polylactide, and is easy to handle.

In the present invention, a lactone compound capable of forming these hydroxyl group-containing carboxylic acids in an aqueous solution may be used instead of the above hydroxyl group-containing carboxylic acid. Examples of such lactone compounds include δ-gluconolactone, γ
Examples include butyrolactone, δ-valerolactone and ε-caprolactone.

Among the tetracarboxylic acids represented by the above general formula (1), edetic acid has excellent solubility in water,
Moreover, it is a recommended compound because no problem was observed in hygiene.

Among the above-mentioned carboxylic acids (b), a hydroxyl group-containing monocarboxylic acid is particularly preferable because it has a low possibility of coloring the cloth and is hygienic. In addition, edetic acid and nitrilotriacetic acid are also preferable because they have remarkable anti-wrinkle effect and anti-shrink effect and are easily available.

The amount of the carboxylic acid (b) used is usually 0.1 to 100% by weight, preferably 1 to 50% by weight, based on the cellulose fiber to be processed. If it is less than this range, the anti-wrinkle effect and the shrink-proofing effect become poor, and even if it is used in a large amount, the effect corresponding to the used amount cannot be obtained, which is not economical.

In producing the non-formalin cellulosic fibers of the present invention, first, a treatment liquid is prepared by dissolving the polycarboxylic acids of (a) and the carboxylic acids of (b) in water to immerse the cellulose fibers. To do.

The concentration of the polycarboxylic acid of (a) and the concentration of the carboxylic acid of (b) in the treatment liquid are not particularly limited, and the concentration calculated from the squeezing ratio of the treatment liquid and the required carrying amount. Can be set appropriately.

It is necessary to add a neutralizing agent, that is, an alkali metal salt to the treatment liquid to adjust the pH of the treatment liquid.

The applicable pH range is usually 1 to 6,
It is preferably 2-5. If the pH is higher than 6, it is difficult to exert the effects of anti-wrinkle effect and anti-shrinkage effect.
When H is lower than 1, hydrolysis of cellulose tends to lower the fiber strength, which is not preferable.

Examples of the alkali metal salt used for adjusting the pH include alkali metal hydroxides, carbonates, bicarbonates, formates, acetates and other monocarboxylic acid salts, phosphates, borates. , Ammonia, secondary amines, tertiary amines, quaternary ammonium salt hydroxide, and the like. Specific examples include sodium hydroxide, sodium bicarbonate, sodium borate, sodium metaborate, sodium silicate, and metasilicate. Examples thereof include sodium phosphate, sodium phosphate, sodium metaphosphate, sodium polyphosphate, sodium pyrophosphate, sodium phosphite, sodium hypophosphite, sodium formate and sodium acetate.
Further, salts of volatile lower amines such as potassium, ammonium, methylamine, dimethylamine, trimethylamine and triethylamine can be used in place of the above sodium, and these salts can be used alone or in combination of two or more kinds. .

The amount of the alkali metal salt used is
Any amount can be used as long as the pH of the treatment liquid can be adjusted to the above range, and the polycarboxylic acid used in (a) or (b) can be used.
It may be appropriately selected depending on the amount and type of the carboxylic acid to be dissolved. Usually, 0.1 to 1 of the above alkali metal salt is added to the treatment liquid.
It may be added at a concentration of 0% by weight.

In addition to the above-mentioned polycarboxylic acids and carboxylic acids, it is preferable to add polyols and / or silicones to the treatment liquid of the present invention, whereby shrinkage of knit products and wash-and-wear (W & W) of woven fabrics can be achieved.
It is possible to improve the property), further improve the texture, and maintain it.

The polyols used in the present invention are alcohols containing at least two alcoholic hydroxyl groups, and specifically, the following (1) to
Various polyols exemplified in each group of (4) are exemplified.

(1) Alcohol having two alcoholic hydroxyl groups: ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, heptanediol, octanediol, nonanediol, decanediol, dodecanediol, etc. 2-12 diols; branched diols such as neopentyl glycol, methylpentanediol, trimethylpentanediol; polypropylene glycol, 1,2-
Polymers of butylene oxide, polyether alcohols such as poly (1,4-butylene glycol).

(2) Alcohol containing three or more alcoholic hydroxyl groups: Aliphatic polyol such as glycerin, diglycerin, triglycerin, polyglycerin, trimethylolethane, trimethylolpropane, pentaerythritol, dipentaerythritol; cyclohexane Alicyclic diols such as diol, cyclohexanedimethanol, hydrogenated bisphenol A, spiroglycol and geometric isomers thereof; reducing sugars such as xylitol, sorbitol, mannitol and erythritol, xylose,
Sorbose, arabinose, ribose, erythrose,
Monosaccharides such as galactose and sorbitin, disaccharides such as lactose, sucrose and maltose; saponified products of polyvinyl acetate and ethylene-vinyl acetate.

(3) Alkylene oxides (ethylene oxide, propylene oxide) of compounds having two or more active hydrogens such as amines, phenols and alcohols
Adduct: As amines, ammonia, carbon number 1 to 2
2 monoalkylamine, alkylenediamine, alkylenetriamine, aniline, o-, m- or p-phenylenediamine, xylylenediamine, diaminodiphenylmethane, diaminodiphenylsulfone, diaminodiphenylether, diaminodiphenylketone, polycondensation product of aniline and formalin. Etc. are illustrated. As phenols, hydroquinone, resorcin, catechol,
Examples include bisphenol A, bisphenol S, phenol novolac, and cresol novolac. Examples of the alcohols include various polyols described in the groups (2) and (3).

Among these polyols, the compounds having three or more primary alcoholic hydroxyl groups are particularly effective in enhancing the flatness-maintaining property and the shrinkproof property. In addition, the aliphatic polyol is effective in maintaining the texture of products such as clothing. Further, a compound containing no amino group is preferable in that the product is prevented from being colored during processing.

Therefore, preferable alcohols as a raw material for adding alkylene oxide include trimethylolpropane, pentaerythritol, dipentaerythritol and tripentaerythritol.

The alcoholic hydroxyl group is preferably a primary alcohol. If a co-adduct of propylene oxide and ethylene oxide is used, the polyol with the ethylene oxide addition last is preferred.

The molecular weight of the polyol is 200 to 1000.
The range of 00 is preferable. When the molecular weight is less than 200, when it is used alone, the fibers produced tend to be hard, which causes a problem in terms of texture. On the other hand, if the molecular weight exceeds 100,000, the effect becomes less due to addition,
Not preferred.

These polyols can be used alone or in admixture of two or more. When two or more kinds of polyols are mixed and used, even if the molecular weight is 200 or less, a compound containing the above-mentioned active hydrogen is added to the polyol as it is, or one having a small addition mole number of ethylene oxide of 1 to 4 moles is mixed. It can also be used.

(4) Polyester polyol of the above polyol and an aliphatic dicarboxylic acid or aromatic dicarboxylic acid having 2 to 12 carbon atoms, or a polyester polyol obtained by previously esterifying the above polyol and the above polycarboxylic acid: the polyester used in this case. It is not preferable that the polyol is a crosslinked gel, and it is preferable that the polyol is at least soluble in a solvent, and preferably in an aqueous solution. Even if it is insoluble in water, one that can be emulsified and solubilized by using a surfactant can be used.

Examples of the aliphatic dicarboxylic acid include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid, sebacic acid and branched fatty acids thereof, unsaturated dibasic acids such as maleic acid and fumaric acid, Examples thereof include alicyclic dibasic acids such as hexahydrophthalic acid, hexahydroisophthalic acid, hexahydroterephthalic acid, tetrahydrophthalic acid and nadic acid. Examples of aromatic dicarboxylic acids include o-, m- or p-phthalic acid, biphenyldicarboxylic acid, diphenylsulfonedicarboxylic acid, diphenyletherdicarboxylic acid, benzophenonedicarboxylic acid and naphthalenedicarboxylic acid.

In the present invention, the glycidyl ether of the above-mentioned polyol can be mentioned as a substance which substantially forms the polyol in the treatment liquid and has the same effect. However, even if a very small amount of these compounds remains, the fiber product obtained from such fibers contains a possibility of inducing skin damage, and therefore requires a sufficient washing step as a commercial product.

The amount of the polyols used in the present invention is usually 0.1 with respect to the natural cellulose fiber to be processed.
-100% by weight, preferably 1-50% by weight.
If it is less than 0.1% by weight, it is difficult to obtain the effect of enhancing the flatness-holding property and shrinkage resistance, and even if it is used in excess of 100% by weight, the effect corresponding to the amount used cannot be obtained, which is not economical.
The polyol concentration of the treatment liquid may be set to a concentration calculated from the squeezing ratio of the treatment liquid and the required amount of supporting.

The silicones used in the present invention are silicon compounds containing at least one aliphatic hydroxyl group and / or epoxy group and / or amino group in the molecule and having dimethylpolysiloxane as a basic skeleton. Are called amino-modified silicone (2) and polyether-modified silicone (3) and are sold.

[0043]

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The amino-modified silicone may cause the treated cloth to be colored depending on its type and composition, and a polyether-modified silicone is preferred. Epoxy-modified silicone is also contained in the fiber silicone because it substantially passes through the aliphatic hydroxyl group. These silicones are available as a raw material or an emulsion solution and can be used as they are.

The content of the above silicones is usually 0.01 to 50% by weight, preferably 0.1 to 10% by weight, based on the cellulose fiber to be processed. If the amount is less than 0.01% by weight, it is difficult to obtain the effect of enhancing the flatness-holding property and shrinkage resistance, and even if the amount exceeds 50% by weight, the effect corresponding to the amount used cannot be obtained, which is not economical.

In the present invention, by adding a known softening agent such as polyethylene emulsion or dimethyl silicone emulsion to the above-mentioned treatment liquid, it is possible to improve the texture of the cellulose fibers and impart the durability.

As a solvent for treating the above-mentioned substrate with respect to the cellulose fiber, it is preferable to use water as a solvent in view of safety and cost, but a water-soluble solvent such as dimethylformamide or dimethylsulfoxide is used as water. It is possible to use together.

According to the method of the present invention, the cellulose fiber is treated with the treatment liquid prepared as described above, and the polycarboxylic acid (a) or the carboxylic acid (b), and if necessary, the polyol and And / or impregnating a predetermined chemical such as silicones. The impregnation method is not particularly limited, and conventionally known dipping method, pad method, spray method, coating method, etc. are exemplified. The permeation rate of the treatment liquid of the present invention into the cellulose fibers is sufficiently high, and the immersion time and bath temperature are not particularly limited. Normally immersion time 0.1
It is carried out at a bath temperature of 10 to 40 ° C. for 300 seconds.

The squeezing differs depending on the product to be processed, and an appropriate squeezing method and squeezing ratio can be adopted for each of mangle, centrifugal rotation and the like. Usually, it is preferable that the drawing rate is 40 to 200%.

After soaking and squeezing, drying is performed. Drying is performed by a dryer such as a hot cylinder type or an air heating type such as a stenter. The drying temperature is usually 40
About 150 ° C is preferable. The drying time may be appropriately selected according to the drying temperature.

According to the method of the present invention, the cellulose fibers impregnated with the above-mentioned polycarboxylic acids are then heat treated. Such heat treatment can be performed by a baking machine that supplies heated air or a device that emits far infrared rays.

The temperature of the heat treatment is 100 to 250 ° C., preferably 120 to 200 ° C., and the treatment time is 0.1 second to 1 hour, preferably 10 seconds to 30 minutes. Under milder conditions than this, the wrinkle-proofing effect and shrink-proofing effect of the work cloth are difficult to be exerted, and on the contrary, under excessively severe conditions, deterioration of the fibers is caused, and the strength is reduced and the fibers are yellowed.

The method of performing the above heating operation while shaping (hereinafter referred to as "shaping and heating") is a more recommended method. The shaping heating is usually 80 to 250 ° C., preferably 1
It is preferably carried out at 20 to 200 ° C. Although the treatment time depends on the heating temperature, 0.1 second to 1 hour is preferable.

More specifically, the shaping heating is roughly classified into a method of heating while applying a load to the cloth (hereinafter referred to as "load heating"), a method of heating while stretching the cloth (hereinafter referred to as "stretch heating"), and the like. it can.

The load heating can be performed in any form of cloth. For example, it may be as-is, may be a partial product such as a placket, a sleeve, and a collar, or may be a product such as pants and a skirt. On the other hand, the stretching heating is performed with the material as it is.

In carrying out load heating, well-known equipment can be widely used, and examples thereof include an iron, a heat press, a heat drum, and calendering.

On the other hand, the stretching heating is a method of pulling the cloth longitudinally and / or laterally, and a recommended method is a method of heating the cloth while stretching the cloth in the transverse direction with a tenter.

The shaping heating may be completed by sufficient shaping heating, but the cloth obtained by the slight shaping heating may be further heated in an oven or a baking machine.

The cloth processed as described above is further subjected to treatments such as washing with water, soaping, application of a fiber softening agent and the like to obtain a product.

Washing with water or soaping is performed with water at 20 to 100 ° C., weak alkaline water such as 0.001 to 1% sodium carbonate aqueous solution, anionic type surfactant aqueous solution such as higher fatty acid salt or sulfonate, and higher alcohol. It is carried out using an aqueous solution of a nonionic surfactant such as an ethylene oxide (EO) adduct.

The washing and soaping steps may be batch type or continuous type. The cloth may be rope-shaped or expanded.
In particular, if the washing is carried out by a continuous spreading washing machine, the washing step, the soaping step and the softening agent applying step can be carried out using the same equipment, which is a preferable method.

The washed cloth is dried with a hot cylinder or heated air. At that time, if necessary, a finishing process such as a width increasing process or a sanforizing process may be performed.

The steps described above, that is, impregnation of the treatment liquid,
Operations such as drying, heating, washing with water, soaping, and finishing and selection of equipment can be appropriately performed depending on the type of the cellulose fiber product to be processed (woven fabric, knit fabric, nonwoven fabric).

[0064]

EXAMPLES The present invention is described in detail below with reference to examples. The properties of the test cloths prepared in each example were measured and evaluated by the following methods.

Wrinkle resistance evaluation method: A test cloth of 30 cm × 30 cm was subjected to home washing (method 103) and tumble drying 10 times to obtain a judgment cloth. It was judged by the DP index according to AATCC test method 124-1967.

Knit shrinkage resistance evaluation method: The test cloth was previously
Knit cloth with marking of 20 cm x 20 cm (3
0 cm × 30 cm) was used. Wash the heat-treated cloth,
The operation of drying with a tumbler dryer was repeated 10 times. After the operation, the marking distance was measured, and the ratio to the distance immediately after the heat treatment was expressed as the shrinkage rate.

Example 1 A 100% plain-woven cotton shirt fabric (DP index 1.0) having a basis weight of 120 g / cm ^{2 was used} for 10% of 1,2,3,4-butanetetracarboxylic acid (hereinafter referred to as “BTC”) and lactic acid. An 8% and 4.5% sodium carbonate aqueous solution was dipped as a treatment liquid, squeezed with a mangle, dried at 60 ° C., and this fabric was heated at 185 ° C. for 180 seconds in an air oven to prepare a treated test fabric. . The DP index of this treated test cloth was 3.4 grade.

Example 2 Pentaerythritol EO 20 mol adduct 2 was added to the treatment liquid.
A treated test cloth was prepared in the same manner as in Example 1 except that 6% by weight of disodium phosphate was used instead of sodium carbonate as a pH adjuster. The DP index of this treated test cloth was 3.6 grade.

Example 3 A treated test cloth was prepared in the same manner as in Example 1 except that 5% by weight of amino-modified silicone SM8702C (manufactured by Toray Industries, Inc.) was added to the treated liquid. The DP index of this treated test cloth was 3.4 grade. The texture of this treated test cloth did not change even after 10 times of washing.

Example 4 Malic acid (3% by weight) was added to the treatment solution, and lactic acid was added to gluconic acid (6).
A treated test cloth was prepared in the same manner as in Example 1 except that the weight% was changed. The DP index of this treated test cloth was 3.4 grade.

Comparative Example 1 A treated test cloth was prepared in the same manner as in Example 1 except that lactic acid was not used. The DP index of this treated test cloth is 2.0
It was class.

Example 5 Cotton knitted fabric [Kago] (shrinkage: warp 21%, weft 15)
%) BTC 4% by weight, “polyethylene glycol # 1
000 "2% by weight, 3% by weight of lactic acid and 1.8% by weight of sodium carbonate were dissolved in an aqueous solution as a treatment liquid, and 25
It was immersed at 5 ° C for 5 minutes and squeezed with a mangle. 100 ° C, 10
After drying for one minute, it was heat-treated at 180 ° C. for 180 seconds to obtain a treated test cloth. The shrinkage ratio of this treated test cloth due to washing was 8% for warp and 3% for weft.

Example 6 Polyether-modified silicone SH3771C (manufactured by Toray Industries, Inc.) 5 in place of "polyethylene glycol # 1000"
A treated test cloth was obtained in the same manner as in Example 5 except that the weight% was used. The shrinkage rate of this treated test cloth due to washing was 9% for warp and 3% for weft.

Example 7 10% by weight citric acid, "polyethylene glycol # 60
0 "2 wt%, glycolic acid 5 wt% and phosphoric acid disodium salt 4 wt% were prepared in an aqueous solution, and the same procedure as in Example 5 was performed except that the heat treatment was performed at 200 ° C for 3 minutes. A treated test cloth was obtained. The shrinkage rate of this treated test cloth due to washing was 13% for warp and 7% for weft.

Comparative Example 2 A treated test cloth was obtained in the same manner as in Example 5 except that lactic acid was not used. The shrinkage rate of this treated test cloth due to washing is 19
% And weft 13%.

Example 8 A treated test cloth was obtained in the same manner as in Example 1 except that an aqueous solution containing 10% by weight of BTC, 6% by weight of edetic acid and 5% by weight of sodium carbonate was used as the treatment liquid. The DP index of this test cloth was 3.3 grade.

Example 9 Pentaerythritol EO 20 mol adduct 2 was added to the treatment liquid.
A treated test cloth was prepared in the same manner as in Example 8 except that 7% by weight of disodium phosphate was used instead of sodium carbonate as a pH adjuster. The DP index of this treated test cloth was 3.5 grade.

Example 10 A treated test cloth was prepared in the same manner as in Example 8 except that 5% by weight of "amino-modified silicone SM8702C" was added to the treatment liquid. The DP index of this treated test cloth was 3.3 grade. The texture of the treated test cloth did not change even after 10 times of washing.

Example 11 A treated test cloth was prepared in the same manner as in Example 8 except that 3% by weight of malic acid was added to the treatment solution and 4% by weight of nitrilotriacetic acid was used as the edetic acid. The DP index of this treated test cloth was 3.3 grade.

Comparative Example 3 The procedure of Example 8 was repeated except that edetic acid was not used,
A treated test cloth was prepared. The DP index of this test cloth is 2.0
It was class.

Example 12 As Example 5, except that an aqueous solution in which 4% by weight of BTC, 2% by weight of "polyethylene glycol # 1000", 2.5% by weight of edetic acid and 2% by weight of sodium carbonate were dissolved was used as a treatment liquid. A treated test cloth was obtained in the same manner. The shrinkage ratio of this treated test cloth due to washing was 9% for warp and 4% for weft.

Example 13 A treated test cloth was obtained in the same manner as in Example 12 except that 5% by weight of "polyether modified silicone SH3771C" was used in place of "polyethylene glycol # 1000". The shrinkage rate of this treated test cloth due to washing is 9%, weft 5
%Met.

Comparative Example 4 A treated test cloth was obtained in the same manner as in Example 12 except that edetic acid was not used. The shrinkage ratio of this treated test cloth due to washing was 19% for warp and 13% for weft.

[0084]

EFFECT OF THE INVENTION Cellulose fibers obtained by the treatment according to the present invention have excellent wrinkle resistance and shrink resistance.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhisa Honda 2-5-9 Matsubara City, Osaka (72) Inventor Yoshiki Uno 496 Aojichi, Kusatsu, Shiga Prefecture

Claims (9)

[Claims] 1. Cellulose fibers comprising (a) a polycarboxylic acid and (b) a hydroxyl group-containing monocarboxylic acid, represented by the general formula: A method for producing non-formalin-based cellulose fibers, which comprises impregnating with at least one carboxylic acid selected from the group consisting of tetracarboxylic acid and nitrilotriacetic acid represented by and heat-treating the same. 2. The non-formalin according to claim 1, wherein the polycarboxylic acid of (a) is at least one selected from the group consisting of tricarballylic acid, aconitic acid, citric acid, malic acid and butanetetracarboxylic acid. Method for producing a cellulosic fiber. 3. The method for producing a non-formalin cellulosic fiber according to claim 1, wherein the carboxylic acid (b) is at least one selected from the group consisting of hydroxyl group-containing monocarboxylic acids. 4. The carboxylic acid is at least one selected from the group consisting of a tetracarboxylic acid represented by the above general formula (1) and nitrilotriacetic acid.
The method for producing a non-formalin-based cellulose fiber according to 1. 5. The hydroxyl group-containing monocarboxylic acid is at least one selected from the group consisting of glycolic acid, lactic acid, gluconic acid, ω-hydroxy fatty acid having 2 to 18 carbon atoms, and ricinoleic acid. A method for producing a non-formalin cellulose fiber. 6. The method for producing a non-formalin cellulose fiber according to claim 4, wherein the tetracarboxylic acid represented by the general formula (1) is edetic acid. 7. A cellulosic fiber is impregnated with the (a) polycarboxylic acid, (b) carboxylic acid and polyol and / or silicone according to any one of claims 1 to 6 and heat-treated. A method for producing a non-formalin cellulose fiber, which comprises: 8. A non-formalin cellulosic fiber produced by the method according to any one of claims 1 to 7. 9. A fiber product obtained from the non-formalin cellulose fiber according to claim 8.