JPH0874176A - Shape-stabilizing processing of cellulose-based fabric - Google Patents

Abstract

PURPOSE: To provide a method for carrying out shape stabilizing processing of a cellulose-based fabric having a high wash and wear property as an index of shape stability and tear strength, free from toxicity to human and excellent in safety. CONSTITUTION: This processing method is to immerse a cellulose-based fabric in a urethane-based resin and/or modified material of a urethane prepolymer and heat-treat the material to attach the material to the fabric, subject the material to crosslinking treatment with bis-(β-hydroxyethyl)-sulfone and further treat the material with the urethane-based resin. The modified material of the urethane prepolymer is a urethane prepolymer modified with a carbamoyl sulfonate group.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a cellulosic fabric using a non-formaldehyde-based cross-linking agent having a tear strength for practical use and excellent wash-and-wear property (hereinafter referred to as W & W property). It relates to a stable processing method.

[0002]

2. Description of the Related Art Cellulosic fiber materials have hitherto been widely used as clothing materials because they have better hygroscopicity and texture than synthetic fiber materials. However, cellulosic fiber material woven fabrics have many drawbacks, such as wrinkles, shrinkage when washed, and gradually hardened fibers after repeated washing, compared to synthetic fiber material woven fabrics. Many processing methods have been proposed.

For example, Japanese Patent Publication No. 49-18517 discloses a processing method in which formaldehyde vapor is used as a cross-linking agent, moisture and sulfur dioxide gas are used in combination as a catalyst, and sulfuric acid produced is used to proceed the reaction at high temperature. ing. However, this method has a drawback that the tearing strength of the cellulosic fiber is extremely reduced due to the influence of the generated sulfuric acid and the cross-linking and immobilization of the cellulosic molecule by formaldehyde. The actual situation is that the decrease in strength is suppressed by mixing fibers or knitting. Also, "Processing Technology" magazine (Vol. 29, No. 6, 1994, p. 38) issued by Textile Co., Ltd.
9 to 395), the cellulose fibers are swelled uniformly by a mercerizing process using liquid ammonia so as to have a substantially circular cross section, and the fibril intervals are narrowed to an average to give the cellulose fibers a soft texture. However, a method of applying formaldehyde resin to remove ammonia after that is outlined. However, since all of these are processing methods using formaldehyde gas or low formaldehyde resin, formaldehyde remains on the fabric after processing, and there is a problem in terms of clothing hygiene and safety.

On the other hand, regarding non-formaldehyde processing of cellulose fibers, Journal of the Textile Society (Vol. 25, No.
11, 1969, P502 to 513, Vol. 26, N
o. 7, 1970, P124-137), a study using an epoxy compound is also published in "Dyeing Industry" magazine, Vol. 24, No. 2, 1976, P76-.
83, Vol. 24, No. 3,1976, P142-
147), studies using vinyl sulfone derivatives have been reported, but a method of non-formaldehyde processing of cellulosic fabrics that has both tear strength for practical use and high morphological stability has not been established yet. Is the actual situation.

[0005]

DISCLOSURE OF THE INVENTION The present invention has a high wash and wear property (hereinafter referred to as W & W), which is an index of morphological stability.
It is called W property. ) And tearing strength, and without using formaldehyde, without toxic to the human body,
It is intended to provide a morphologically stable processing method of a cellulosic fabric having excellent safety.

[0006]

The present inventors have arrived at the present invention as a result of extensive studies to solve the above problems. That is, according to the present invention, a cellulose-based woven fabric is impregnated with a urethane resin and / or a modified product of a urethane prepolymer by heat treatment to be adhered thereto, and then crosslinked with bis- (β-vidroxyethyl) sulfone, and then a urethane resin is further added. It is a new morphological stable processing method.

The cellulosic fabric of the present invention refers to a woven fabric of cellulosic fibers obtained by individually or blending cellulosic fibers such as cotton, rayon and polynosic. However, it can also be applied to fabrics such as knits.

In the present invention, for the purpose of preventing a decrease in tear strength, a usual mercerized or bleaching-treated cellulosic fabric is first impregnated with a modified urethane resin and / or a urethane prepolymer to adhere the same. Let By forming or adhering a polymer film on the fiber surface, the texture of the cellulosic woven fabric becomes coarse and hard, and depending on the type of polymer, water repellency is imparted and the inherent hydrophilicity of cellulose may disappear. is there. Therefore, as the urethane-based resin used in the present invention, a water-soluble or self-dispersible resin obtained by arranging some hydrophilic groups or hydrophilic segments in the polyurethane resin is used. As the modified product of the urethane prepolymer, a compound in which the terminal of the molecule is blocked with a hydrophilic group such as a carbamoyl sulfonate group is preferable because it is water-soluble without using an emulsifier.
These urethane resins and modified products of urethane prepolymers have the effect of preventing the reduction in tear strength caused by the cross-linking treatment by forming a strong coating by heat treatment.

The treatment liquid concentration of the modified urethane resin and / or urethane prepolymer on the cellulosic fabric is
Considering the fact that the texture of the cellulosic fabric is not impaired and the tear strength is prevented from being lowered, 1 to 5% by weight is preferable,
Further, in order to improve the texture and the like, an aminosilicone-based or silicone-based softening oil may be mixed and used in the range of 1 to 3% by weight.

The treatment solution is impregnated with a cellulosic fabric, then squeezed to 80% by a roller, and then 70 to 170.
Drying heat treatment is performed at a temperature of 80 ° C, preferably 80 to 165 ° C. The heat treatment time can be set appropriately. As a cross-linking agent, bis- (β-hydroxyethyl) sulfone (hereinafter referred to as BHES) is highly safe and has a well-balanced anti-wrinkle property and shrink-proof property in normal impregnation, drying and curing treatments. It is preferable in that the property is obtained. The concentration of the treatment liquid can be appropriately set according to desired wrinkle resistance and shrink resistance, but it is preferably used in the range of 100 to 250 g / l. More preferably, it is used in the range of 150 to 200 g / l because it is possible to provide high morphological stability and sufficient tear strength. On the other hand, the processed product has better wrinkle resistance and washing resistance when the treatment concentration of BHES is higher, but it has a tear strength (weft) of 750 g or more which leaves a texture peculiar to the material used for the woven fabric and is practically usable. In order to retain the above, the treatment concentration of BHES is 150 to 20
It is preferably used in the range of 0 g / l.

In order to accelerate the crosslinking reaction, it is preferable to add and use an aqueous solution of sodium carbonate as a catalyst.
Oxidative decomposition of cellulose by alkali and heat produces a polyoxycarboxylic acid derivative, which is again attached to the cellulose by BHES, which causes a defect that the woven fabric is yellowed. Therefore, when using sodium carbonate,
A boron compound such as sodium borohydride or sodium borate may be used in combination as a yellowing inhibitor. For example, it is advisable to mix and use BHES at a concentration of 0.5 to 2.0 g / l with an aqueous solution obtained by adding 12% of sodium borohydride to a 40% sodium hydroxide aqueous solution. Further, a fluorescent whitening agent may be appropriately added and used depending on the desired whiteness.

The crosslinking treatment is carried out by the above-mentioned urethane resin and / or
Alternatively, the modified cellulose prepolymer is impregnated and heat-treated to adhere the cellulosic woven fabric to the treatment solution for dipping and impregnation, and squeezing with a roller to a squeezing ratio of 80%,
After drying at 120 ° C, curing may be performed at 150 to 165 ° C. The heat treatment time is not particularly limited as long as it is a time sufficient for the crosslinking reaction to proceed sufficiently.
It can be appropriately set depending on the basis weight of the cellulosic fabric.

Next, soaping is performed and resin processing is again performed with a urethane-based resin, but it is preferable that the treatment liquid concentration is treated in a concentration range in which the total concentration of the treatment liquid before the crosslinking treatment does not exceed 5% by weight. The thus-prepared urethane resin is immersed in an aqueous dispersion, and the urethane resin is impregnated, dried and cured to further react and adhere to the cellulosic fabric. Instead of the post-treatment of the urethane resin, it is also possible to use a modified product of the urethane prepolymer used in the pretreatment.

Washing and drying after the soaping step, and
Finishing processing such as finishing oil agent treatment is not particularly limited and may be performed by a commonly used method.
Further, in order to further increase the whiteness of the woven fabric, instead of the soaping treatment after the crosslinking treatment, 5 cc / l of a 35% hydrogen peroxide aqueous solution is used.
Bleached using a concentration of 90% acetic acid aqueous solution at 1 cc /
It can be washed with water and dried after being used at a concentration of 1 and neutralized. In the method of the present invention, a modified urethane resin and / or a modified urethane prepolymer is adhered to the cellulosic woven fabric by impregnation and heat treatment, followed by crosslinking treatment with BHES and further treatment with the urethane resin. , Which has a tear strength that is practically unachievable until now, and has wrinkle and shrink resistance that are well-balanced in dry and wet conditions, and also W & W properties that retain the hygroscopicity and texture of cellulosic fabrics. An excellent cellulosic fabric is obtained.

[0015]

The present invention will be described in detail below with reference to examples, but the present invention is not limited to the scope of the examples.
The W & W property, tear strength, water absorbency, texture and whiteness were tested by the following methods.

1) W & W property JIS L1096-19
79 6.23 Method A Tumble dry 2) Tear strength JIS L1096-1979 6.
15.5 Method D 3) Water absorption test A sample was cut into a piece having a width of 3 cm and a length of 15 cm, the tip 5 mm was vertically dipped in a 200 ml beaker containing 100 ml of ion-exchanged water for 1 minute, and then taken out. After allowing it to stand for 1 minute to absorb water sufficiently, the height of the absorbed water was measured. 4) Texture and whiteness Five inspectors conducted a sensory test and judged according to the following criteria. All 5 people are good; ◎ 3 people ~
4 good; ○ good 2 or less; △ all bad; ×

Example 1 Mercerized width 50
cm, cotton fabric with a length of 10 m (Basis weight: 120 g / m ² , 8
No. 0 twin yarn, warp / weft density 133 × 73 / in. ) Prepared. 2% by weight of urethane resin UPM-211H (20% active ingredient, manufactured by Yushisha Kogyo Co., Ltd.) was dispersed in water to obtain 2% by weight of urethane resin dispersion. The above cotton fabric was dipped in the dispersion liquid to impregnate it with a urethane-based resin, and then squeezed with a roller to a squeezing ratio of 80%. Next, after applying a drying heat treatment to the cotton fabric for 8 minutes at 80 ° C. to fix the urethane-based resin to the cotton fabric, the cotton fabric was divided into five pieces each having a length of 2 m. Separately from this, five untreated cloths of the above-mentioned cotton fabric were prepared as controls, each having a width of 50 cm and a length of 2 m.

As a catalyst, 4% by weight of sodium carbonate,
As an anti-yellowing agent, Vensil (registered trademark Vensil,
Morton International) 0.5% by weight, fluorescent whitening agent 0.3% by weight of Illuminal BSN (Showa Kako Co., Ltd.) as an aqueous solution, and BHES-50 (active ingredient: 50) as a crosslinking agent. %, Meisei Chemical Co., Ltd.
250 g / l, 300 g / l, 350 g / l,
Add 400 g / l and 450 g / l to add BHE
S concentration is 125g / l, 150g / l, 175g /
Five levels of the crosslinking treatment liquid of 1, 200 g / l and 225 g / l were prepared.

A cotton fabric having a length of 2 m and the untreated control fabric fixed with the above urethane-based resin are immersed in the cross-linking treatment liquid one by one to impregnate with the cross-linking treatment liquid.
It was squeezed with a roller at a squeezing ratio of 80%, dried at 120 ° C. for 1 minute, applied to a baking machine, cured at 165 ° C. for 2 minutes, and crosslinked. Next, 1 g of trade name Adekanol TS-403A (manufactured by Asahi Denka Co., Ltd.)
/ L aqueous solution, each of the 10 cotton fabrics after the above treatment was soaped, washed with water and dried, and then urethane resin UPM
-211H (active ingredient: 20%, meanwhile, Yushisha Kogyo Co., Ltd.)
The crosslinked cotton fabric is dipped in a 1% by weight dispersion of a urethane resin prepared by dispersing it in water so as to be 5% by weight, and then immersed and dried in the same manner as the above-mentioned crosslinking treatment. A so-called resin treatment was applied to the cotton fabric by curing.

Next, the trade name Adekanol TS-403
A (Asahi Denka Kogyo Co., Ltd.) 1 g / l aqueous solution, each of the 10 cotton fabrics that have been subjected to the above-mentioned treatment is soaped, washed with water, and dried to obtain a finish oil agent under the trade name Silicoran AN-980S.
Samples I-1, II-1, III-1, IV-1, V-1 are finished with a pad dryer using an aqueous solution containing 5% by weight of (active ingredient: 25%, produced by Yushisha Kogyo Co., Ltd.). -1 and control-I, II, III, IV, V ten kinds of processed textile samples were obtained. Tables 1 and 2 show the results of examining the W & W property, tear strength, water absorbency, texture and whiteness of these samples.

[0021]

[Table 1]

[0022]

[Table 2]

As is clear from Tables 1 and 2, after the cross-linking treatment, the cross-linking agent was treated with 2% by weight of the urethane resin, and then the cross-linking agent concentration was 150 g / l to 200 g / l. Further, the cotton fabric treated with 1% by weight of urethane resin had good W & W property, tear strength, water absorbency, texture and whiteness. In addition, the effect of preventing tear strength from lowering is low when the resin is not treated with the urethane resin before the crosslinking treatment but is treated with 1% by weight of the urethane resin after the crosslinking treatment.

(Example 2) The same cotton fabric as in Example 1 was used without adding a fluorescent whitening agent to the cross-linking treatment liquid, and the soaping treatment after the cross-linking treatment was performed with a 35% hydrogen peroxide aqueous solution 5c.
After bleaching in a c / l addition bath, 90% acetic acid aqueous solution 1 cc / l
Samples I-2, II-2, III- were treated in the same manner as in Example 1 except that the neutralization treatment was performed in the addition bath.
2, IV-2, V-2 were obtained. Table 3 shows the results of examining the W & W property, tear strength, water absorption, texture and whiteness of these samples.
It was shown to.

[0025]

[Table 3]

As is clear from Table 3, even if the fluorescent whitening agent is not used, if the bleaching treatment is carried out instead of the soaping treatment, it is treated with 2% by weight of the urethane resin before the crosslinking treatment,
Next, after the cross-linking agent concentration is cross-linked in the range of 150 g / l to 200 g / l, the cotton fabric treated with 1% by weight of urethane resin has good W & W property, tear strength, water absorbency, texture and whiteness. It was something.

Example 3 A mercerized width of 50
A cm / length 10 m cotton / polynosic mixed-spun woven fabric (mixed spinning rate: 45% cotton / 55% polynosic, 60th single yarn, warp / weft density: 90 × 88 / in.) was prepared.

10% by weight of urethane resin UPM-211H (active ingredient: 20%, produced by Yushisha Kogyo Co., Ltd.) and aminosilicone softening oil trade name Silicoran A
N-980S (active ingredient: 25%, manufactured by Yushisha Kogyo Co., Ltd.) was mixed and dispersed in water so as to contain 5% by weight,
A mixed dispersion having a urethane resin concentration of 2% by weight and an aminosilicone softening oil concentration of 1.25% by weight is prepared, and a cotton / polynosic mixed-spun fabric is dipped in the dispersion and drawn with a roller at a draw ratio of 80. %, And a dry heat treatment was performed at 80 ° C. for 10 minutes.

The fabric is used as a finishing oil under the trade name Sofmine SN-12 (active ingredient: 20%, manufactured by Miyoshi Yushi Co., Ltd.)
Sample I-3, II-3, III-3 was treated in the same manner as in Example 1 except that a dispersion of 1% by weight of urethane resin and 1% by weight of finishing oil was added to the above 5% by weight aqueous solution. , IV-
3, V-3 was obtained. Table 4 shows the results of examining the W & W property, tear strength, water absorbency, texture and whiteness of these samples.

[0030]

[Table 4]

As is clear from Table 4, 2
A mixture of 1 wt% urethane resin and 1.25 wt% aminosilicone softening oil is used, and the crosslinker concentration is 1
A cotton / polynosic woven fabric which has been cross-linked in the range of 50 to 200 g / l and then treated with 1% by weight of a urethane resin and 1% by weight of a finishing oil has a W & W property, tear strength,
The water absorption, texture and whiteness were all good.

Example 4 A mercerized width woven fabric of 50 cm in width and 10 m in length obtained by using a cotton yarn as a warp and a polynosic yarn as a weft (weight per unit area: 100 g / m ² , # 50 single yarn, warp density: 133 yarns × 73 pieces / in.) Were prepared.

Trade name Elastron C-52 (active ingredient: 15%, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), which is a modified product of urethane prepolymer, and ADEKA BONTITER HUX-260 (active ingredient, trade name, which is a urethane resin. : 34%, manufactured by Asahi Denka Kogyo Co., Ltd., and mixed in 10% by weight and 7% by weight, respectively, and dispersed in water to obtain 1.5% by weight of a modified urethane prepolymer and urethane type resin. A dispersion mixed at a concentration of 2.38% by weight was prepared. In the mixed dispersion liquid,
The above-mentioned mixed woven fabric was dipped, squeezed with a roller at a squeezing ratio of 80%, dried at 100 ° C. for 5 minutes, and cured at 165 ° C. for 2 minutes to divide into 2 m long 5 sheets.

The mixed woven fabric was treated with the crosslinking treatment liquid of Example 1 and soaped with 1 g / l of ADEKA NOL TS-403A (trade name, manufactured by Asahi Denka Kogyo Co., Ltd.). Next, it is a polyether type urethane resin as a urethane resin, trade name BIPLET-USV (BAYPRET-U
SV, active ingredient: 28%, Bayer KK 2% by weight
Dispersion, ie 0.56 of polyether type urethane resin
The same treatment as in Example 1 was carried out with a weight% aqueous dispersion, and the subsequent treatment was also carried out in the same manner as in Example 1 to prepare samples I-4, II-4, and III.
-4, IV-4, V-4 were obtained. W & W of these samples
Table 5 shows the results of the examination of the toughness, tear strength, water absorbency, texture and whiteness.

[0035]

[Table 5]

As is clear from Table 5, 1.5% by weight of the urethane resin and 2.38% by weight of the modified product of the urethane prepolymer are mixed and used for the treatment, and then the crosslinking treatment is carried out at 150 to 200 g / l concentration range of 0.56
W & W is a mixed woven fabric treated with wt% urethane resin.
The toughness, tear strength, water absorption, texture and whiteness were all good.

Example 5 A bleached polynosic fabric having a width of 50 cm and a length of 10 m (Basis weight: 120 g / m ² ,
No. 50 single yarn, warp density: 130 yarns × 82 yarns / in. ) Prepared.

Polyurethane type urethane resin, trade name BIPLET-USV (BAYPRET-USV, active ingredient: 28%, manufactured by Bayer Co., Ltd.) is dissolved in water to 10% by weight, and urethane resin 2. An aqueous dispersion containing 8% by weight was obtained.

The above polynosic woven fabric was dipped in the urethane dispersion to impregnate the urethane resin aqueous dispersion, and after squeezing with a roller at a squeezing ratio of 80%, the mixture was dried at 100 ° C. for 8 hours.
Dry for 2 minutes, and cure for 2 minutes at 165 ° C for 2m
Divided into 5 pieces. The polynosic woven fabric was treated with the same crosslinking treatment solution as in Example 1, and then the same treatment as in Example 1 to obtain samples I-5, II-5, III-5, IV-5, V-5. It was Table 6 shows the results of examining the W & W property, tear strength, water absorbency, texture and whiteness of these samples.

[0040]

[Table 6]

As is clear from Table 6, after the cross-linking treatment, the cross-linking agent was treated with 2.8 wt% of the urethane resin, and then the cross-linking agent was cross-linked in the concentration range of 150 to 200 g / l. The polynosic woven fabric treated with the urethane resin of No. 3 had good W & W property, tear strength, water absorbency, texture and whiteness.

Example 6 Mercerized width 50
cm x 2 m long cotton fabric (Basis weight: 120 g / m ² , 80
Banso yarn, warp and weft density: 133 × 73 yarns / in. 5) were prepared for each.

UPM-211H which is a urethane resin
(Active ingredient: 20%, produced by Yasusha Yushi Kogyo Co., Ltd.) is dispersed in water and added to each of 0, 5, 15, 20, 25% by weight, and each urethane resin is 0% by weight. , 1.0
Five types of aqueous dispersions containing 5% by weight, 3.0% by weight, 4.0% by weight and 5.0% by weight were obtained. Each of the above-mentioned cotton fabrics was dipped in the dispersion liquid one by one, impregnated with a urethane resin, and then squeezed with a roller at a squeezing ratio of 80%. Next, put it in a dryer at 80 ° C.
Was dried and heat-treated for 8 minutes to fix the urethane-based resin to the five 2 m long cotton fabrics.

As a catalyst, 4% by weight of sodium carbonate,
As an anti-yellowing agent, Vensil (registered trademark Vensil,
Morton International) 0.5% by weight, fluorescent whitening agent 0.3% by weight of Illuminal BSN (manufactured by Showa Kako Co., Ltd.) as an optical brightener, and BHES-50 (active ingredient: 50) as a crosslinking agent. %, Meisei Chemical Co., Ltd.
350 g / l was added to prepare a crosslinking treatment liquid containing 175 g / l of BHES.

Each of the cotton fabrics to which the above urethane-based resin is fixed is immersed in the crosslinking treatment liquid one by one, and each of the cotton fabrics impregnated with the crosslinking treatment liquid is immersed in each one and impregnated with the crosslinking treatment liquid. After making it squeeze with a roller at a draw ratio of 80%, 12
After drying at 0 ° C for 1 minute, apply a baking machine 16
Curing was performed at 5 ° C. for 2 minutes to carry out a crosslinking treatment.
Then, five cotton fabrics cross-linked with a 1 g / l aqueous solution of Adecanol TS-403A (trade name, manufactured by Asahi Denka Kogyo Co., Ltd.) were soaped, washed with water and dried. And Example 1
Samples I-6, II-6, III-6, IV-6, V- treated with a 1% by weight solution of urethane resin and finished.
Got 6. Table 7 shows the results of examining the W & W property, tear strength, water absorbency, texture and whiteness of these samples.

[0046]

[Table 7]

As is apparent from Table 7, it is understood that the one not treated with the urethane resin before the crosslinking treatment has a large decrease in strength. In addition, a cotton fabric treated with urethane resin before the crosslinking treatment and further treated with the urethane resin after the crosslinking treatment in a concentration range in which the total resin concentration does not exceed 5% by weight has a W
The & W property, tear strength, water absorbency, texture and whiteness were all good.

(Embodiment 7) A mixed woven fabric having a width of 50 cm and a length of 2 m, which is mercerized by using a cotton yarn as a warp and a polynosic yarn as a weft (a basis weight: 100 g / m ² , a 50th single yarn, a warp / weft density: 133 yarns). X 73 pieces / in.) Were prepared.

Trade name Elastron C-52 (active ingredient: 15%, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), which is a modified product of urethane prepolymer, and trade name ADEKA BONTITER HUX-260 (active ingredient, which is urethane resin. : 34%, Asahi Denka Kogyo Co., Ltd., 1% by weight + 1% by weight = 2% by weight,
4 wt% + 2 wt% = 6 wt%, 10 wt% + 5 wt%
= 15% by weight, 12% by weight + 6% by weight = 18% by weight, 2
0 wt% + 10 wt% = 30 wt% dispersed in water, the urethane resin and the modified product of the urethane prepolymer are each 0.15 + 0.34 = 0.49 wt%,
0.6 + 0.68 = 1.28% by weight, 1.5 + 1.7 =
3.2% by weight, 1.8 + 2.04 = 3.84% by weight, 3
5 levels of the dispersion liquid mixed at + 3.4 = 6.4% by weight were prepared. Each of the above-mentioned mixed woven fabrics was dipped in the urethane mixed dispersion one by one to impregnate the urethane resin and the modified product of the urethane prepolymer, then squeezed with a roller at 80% and dried at 100 ° C. for 5 minutes. Further, it was cured at 165 ° C. for 1.5 minutes to obtain 5 kinds of 2 m long woven fabric.

Using the cross-linking treatment liquid of Example 1 for the mixed woven fabric, the urethane resin UPM-211H of Example 1 was used.
(Active ingredient 20%, produced by Yasusha Yushi Kogyo Co., Ltd.) 5% by weight was replaced with 2% by weight, and the same treatment as in Example I-was performed except that the urethane resin was treated at 0.4% by weight. 7, II-
7, III-7, IV-7, V-7 were obtained. W of these samples
Table 8 shows the results of examining & W property, tear strength, water absorbency, texture and whiteness.

[0051]

[Table 8]

As is clear from Table 8, even when the urethane resin and the modified product of the urethane prepolymer are mixed and used before the crosslinking treatment, the total amount of the urethane resin used after the crosslinking treatment is 1% by weight to 5% by weight. Within the range of%, the mixed woven fabric was good in W & W property, tear strength, water absorbency, texture and whiteness.

[0053]

EFFECTS OF THE INVENTION The method for stabilizing the morphology of a cellulosic fabric of the present invention has the above-mentioned constitution, and a modified urethane resin and / or a urethane prepolymer is impregnated and heat-treated on the cellulosic fabric. After that, since it is cross-linked with BHES and then treated with urethane resin again, it has higher W & W properties than the morphologically stable processed product of cellulosic fabric obtained by the conventional processing method, and at the same time, it is practically used. Has sufficient tear strength to withstand.
In addition, the cross-linking treatment is performed using BH which is a non-formaldehyde cross-linking agent.
Since ES is used, the safety is extremely high. Therefore, the woven fabric processed by the morphological stable processing method of the cellulosic woven fabric of the present invention is used as a raw material such as a shirt uniform, a uniform, a hospital bed sheet, a sanitary material such as a lab coat, a bedclothing material such as a sheet and a futon cover. Can be preferably used as.

Claims (2)

[Claims] 1. A cellulosic fabric is impregnated with a urethane resin and / or a modified product of a urethane prepolymer by heat treatment to be adhered thereto, and then crosslinked with bis- (β-hydroxyethyl) sulfone, and further, a urethane system. A method for processing a cellulosic woven fabric, which comprises treating with a resin. 2. The method for processing a cellulosic fabric according to claim 1, wherein the modified product of the urethane prepolymer is a urethane prepolymer modified with a carbamoyl sulfonate group.