JPH10140478A - Flame retardant woven fabric and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a woven fabric, extremely slightly changing the touch feeling and appearance without deteriorating the flame retardance by repetitive washing at high temperatures, having a low shrinkage percentage and suitably usable for applications of flame retardant working wear. SOLUTION: This flame retardant woven fabric is produced by treating a woven fabric, composed of composite yarns of 30-70wt.% halogen-containing fiber containing 6-50wt.% Sb compound with 70-30wt.% cotton and containing >=3wt.% Sb compound in the weight of the whole woven fabric with an N- methylol cellulose reactive type resin and then carrying out the mechanical shrink resistant finish. The resultant woven fabric has <=3% washing shrinkage percentage after washing 50 times with water at 60-95 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fabric which is excellent in shrink resistance when repeatedly washed with high-temperature water at 60 to 95.degree. C. and has flame retardancy without impairing the feeling and appearance even after washing, and the production thereof. About the law.

[0002]

2. Description of the Related Art As a method of imparting durable flame retardancy to cotton, which is a flammable fiber, generally, a propane process or a pyrobatex process is performed in a post process. Fabric shrinkage is large, fading in appearance, intense puckering, the texture is hardened further, and there is always the risk of flame retardance reduction due to post-processing,
The disadvantage is that the durability in high-temperature washing is low.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a woven fabric having a low shrinkage rate by repeating high-temperature washing without impairing flame retardancy, having a very small change in feeling and appearance. Is what you do.

[0004]

Means for Solving the Problems Cotton easily swells with water during washing and shrinks with a woven fabric. On the other hand, halogen-containing fibers, which are one type of synthetic fibers, hardly swell with water and shrink the fabric. Therefore, a woven fabric obtained by combining cotton and a halogen-containing fiber naturally has superior washing shrinkage in washing compared with a woven fabric composed of 100% cotton fiber.
However, as the proportion of cotton increases, the shrinkage in washing increases accordingly. In order to lower the washing shrinkage more, it is necessary to prevent the cotton itself from shrinking due to swelling.

[0005] The present invention relates to a total woven fabric formed as a flame retardant in a woven fabric composed of 30 to 70 wt% of a halogen-containing fiber containing 6 to 50 wt% of an Sb compound and 70 to 30 wt% of a cellulosic fiber. By containing 3% by weight or more of the Sb compound in the weight, the shrinkage rate after washing 50 times with high temperature water at 60 to 95 ° C. is 3% or less, and the flame retardancy does not decrease even after washing. It was woven. This woven fabric can be composed of a yarn that is a composite of the halogen-containing fiber containing the flame retardant and the cellulosic fiber.

Further, in the present invention, an N-methylol cellulose-reactive resin and a softening agent are applied to a woven fabric made of a composite yarn of a halogen-containing fiber containing the above-mentioned flame retardant and a cellulosic fiber, and dried and heat-treated. After that, mechanical spinning such as sanforize processing and cam hit processing is performed, so that it does not lose flame retardancy due to high-temperature washing, has excellent shrink resistance, and has little change in appearance (fading, puckering) and feeling change. The fabric was completed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the term "halogen-containing fiber" includes modacrylic fiber and polyclar fiber, and further contains, as a flame retardant, 3% by weight or more of an Sb compound in the total weight of the formed fabric. It becomes. Therefore, when the halogen-containing fibers occupy 50% by weight in the woven fabric, it is necessary that the halogen-containing fibers contain 6% by weight or more of the flame retardant.

In the present invention, the halogen-containing fiber is a copolymer comprising 40 to 70% by weight of acrylonitrile, 60 to 30% by weight of a halogen-containing vinyl monomer, and 0 to 3% by weight of a monomer containing a sulfonic acid group. It is preferable to be configured by uniting. If the acrylonitrile content is less than 40% by weight, the heat resistance of the woven fabric is not sufficient, and
If the content exceeds 10% by weight, a sufficient effect on flame retardancy cannot be obtained.

Examples of the halogen-containing vinyl monomer include vinyl chloride, vinylidene chloride, and vinyl bromide, and one or more of these are used. If the halogen-containing vinyl monomer is less than 30% by weight, a sufficient effect on the flame retardancy cannot be obtained, and if the halogen-containing vinyl monomer exceeds 60% by weight, the heat resistance of the fabric is not sufficient.

The sulfonic acid group-containing monomers include methacrylsulfonic acid, allylsulfonic acid, styrenesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, and salts thereof (for example, sodium salt). , Potassium salts, ammonium salts and the like). A monomer containing a sulfonic acid group is used as needed, but if it exceeds 3% by weight, spinnability will be reduced.

In the present invention, it is necessary that the Sb compound is contained in the entire woven fabric as a flame retardant in an amount of 3% by weight or more. As the Sb compound, antimony oxide is preferable. Antimony oxide is antimony trioxide,
And antimony pentoxide. If these antimony oxides are less than 3% by weight in the fabric, the effect on flame retardancy is not sufficient. In order to contain 3% by weight or more of antimony oxide in the total weight of the woven fabric, it is desirable to previously contain 6 to 50 parts by weight of antimony oxide in the halogen-containing fiber with respect to the polymer constituting the fiber. . If the amount is less than 6 parts by weight, the flame retardancy is not sufficient. If the amount exceeds 50 parts by weight, problems in the production process of the halogen-containing fiber (for example, clogging of nozzles, pressure increase), and remarkable deterioration of fiber physical properties occur.

As described above, antimony oxide is suitable as a flame retardant, but of course, antimony oxide and other flame retardants may be used in combination. Flame retardants other than antimony oxide include organic bromine compounds, oxides such as tin, zirconium, and aluminum, and hydroxides.

In the present invention, examples of the cellulosic fiber include natural fibers such as cotton and hemp, and regenerated fibers such as rayon. These cellulosic fibers may be composited with synthetic fibers in the form of blending, twisting, weaving, and the like, and the woven structure, density, yarn count, and the like can be set according to the application.

In the present invention, it is preferable that an N-methylol cellulose-reactive resin and a softening agent are applied to a woven fabric made of a composite yarn of the halogen-containing fiber containing the flame retardant and the cellulosic fiber. Examples of the N-methylol cellulose-reactive resin include dimethylethylene urea, dimethylol ethylene urea, dimethylolalkyltriazine, methylated dimethyloluron, hexamethylolmelamine,
Dimethylol propylene urea, dimethylol dihydroxyethylene urea, tetramethylol acetylene urea, 4
-Methoxy-5-dimethylpropylene urea. For clothing, dimethylol hydroxyethylene urea, which is a low formaldehyde, is preferred. As the catalyst used in this case, there are an organic amine salt type, a metal salt type, a composite metal salt type and the like, and a metal salt type magnesium chloride is particularly desirable. In addition, when the tear strength of the woven fabric after processing is reduced by using only the above resin processing agent, it is preferable to use a silicone softener, a pyridinium-based cation activator, and a polyethylene-based resin in combination with the feeling control.

In order to apply the N-methylol cellulose-reactive resin or the like to the woven fabric, a resin liquid is impregnated by a usual putting method or a dipping method. Usually 2 dip-
The 2nip method is used. The impregnation of the resin is carried out by
The concentration of the methylol-based cellulose-reactive resin is 30 to 100;
g / L aqueous solution, and the squeezing rate after impregnation with the resin liquid is 60.
９０90%. When the amount of the N-methylol-based cellulose-reactive resin adhered to the fabric is small, the shrinkage-preventing effect is low. On the contrary, when the amount of N-methylol-based resin is large, the shrinkage-preventing effect is increased, but the tear strength and the abrasion are reduced. 80 to 12 after impregnation with resin liquid
After drying at 0 ° C for 2 to 5 minutes, by performing a heat treatment (baking) at 130 to 180 ° C for 1 to 3 minutes,
The N-methylol-based fibrous reaction type resin is cross-linked with the cellulosic fiber. At this time, overfeeding the cloth to such an extent that wrinkles do not occur on the ears of the fabric is also effective for shrinkage prevention. Thereafter, if necessary, soaping, washing and drying are performed for the purpose of removing unreacted resin and neutralizing the acidic catalyst.

Finally, mechanical shrink-prevention processing is performed for the purpose of removing warp in the processing direction and adjusting the hand. As the machine, a sun forcing machine, a cam hit machine (manufactured by Uenoyama Iron Works) or the like is used. In the case of a cam hit machine, the heating roller temperature is 90 to 115 ° C., preferably 1 to 115 ° C.
05 ° C. Set amount of woven fabric (rubber compression ratio)
Varies depending on the weave structure, fabric weight, and thickness.
30%. Using a thick felt blanket or a rubber belt, it compresses in the warp direction using the difference between the inner and outer circumferences, and is set by the ironing effect of the heating cylinder.

[0017]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. still,
Prior to the description of the examples, methods for measuring characteristic values in the examples will be described below.

[0018] The evaluation was carried out in the tests of each country shown in Table 1 below, which are carried out in the flame-retardant clothing, particularly in the field of work clothes.

[0019]

[Table 1]

Based on the tensile strength A method (stripping method) of JIS L1096,
A test piece having a width of 5 cm is gripped at a spacing of 20 cm and a tensile speed of 2
It was pulled at 0 cm / min, passed through the tensile strength at break (kgf), and measured in the weft direction.

[0021] Based on the pendulum method tear strength JIS L1096, via The maximum load was measured indicating when tearing in the weft direction.

Washing shrinkage was evaluated by tests in each country shown in Table 2 below.

[0023]

[Table 2]

Practical industrial washing test of sewn products A practical industrial washing test was carried out on workwear outerwear sewn products in the following manner. (1) Washing machine Washer Toto Denki Co., Ltd. Type W
1-160 (2) Dryer Tunnel drying Ring finisher (3) Washing conditions Table 3 below.

[0025]

[Table 3]

Example 1 Acrylonitrile (AN) 5
The polymerization is carried out using 0.1% by weight, 47.2% by weight of vinyl chloride (VC), and 2.7% by weight of sodium styrene sulfonate (SSS). Subsequently, the resin is dissolved in acetone, and antimony trioxide is dissolved. Spinning was performed by adding (Sb ₂ O ₃ ) 20% by weight. The obtained single yarn fineness of 2d (denier) was cut into 38 m, and then this was blended with 55% by weight and 45% by weight of cotton. / 2 (ECC) spun yarn. This spun yarn was used for warp and weft to prepare three types of woven fabrics. After that, hair burning, scouring bleaching, anti-dyeing (2 bath dyeing using cationic dye / reactive dye), resin processing,
Set and cam hit processing were implemented. The processing conditions at this time are shown in Table 4, and the evaluation of the finished fabric is shown in Tables 5 and 6.

[0027]

[Table 4]

[0028]

[Table 5]

[0029]

[Table 6]

In addition, weaving standards 24/2 shown in Tables 5 and 6
× 24/2 (80 × 59) woven fabric and a commercially available flame-retardant cotton (Provan processed product) with the same basis weight were used to prepare working clothes, and a practical industrial washing test was performed.
Table 7 summarizes the results.

[0031]

[Table 7]

[0032]

As described above, the flame-retardant woven fabric according to the present invention does not impair the flame retardancy even after repeated high-temperature washing, has a very small change in feeling and appearance, and has a low shrinkage. Therefore, it can be suitably used for the use of flame-retardant work clothes that have many opportunities for repeated high-temperature washing.

Claims (6)

[Claims] 1. 30 to 70% by weight of a halogen-containing fiber containing 6 to 50% by weight of an Sb compound and a cellulosic fiber 7
A woven fabric composed of 0 to 30% by weight, containing 3% by weight or more of an Sb compound in the total weight of the woven fabric;
A flame-retardant woven fabric having a shrinkage of 3% or less after washing 50 times with water at 95 ° C. 2. The flame-retardant woven fabric according to claim 1, comprising a composite yarn of the halogen-containing fiber and the cellulosic fiber. 3. The method according to claim 1, wherein the halogen-containing fiber comprises 40 to 70% by weight of acrylonitrile,
3. The flame-retardant woven fabric according to claim 1, comprising a copolymer comprising 0 to 30% by weight and 0 to 3% by weight of a monomer containing a sulfonic acid group, and an Sb compound. 4. The flame-retardant woven fabric according to claim 1, wherein the cellulosic fiber is cotton. 5. The fabric according to claim 1, wherein a softener is applied to the fabric.
The flame-retardant woven fabric according to claim 4. 6. Halogen-containing fibers containing 6 to 50% by weight of an Sb compound and 30 to 70% of a cellulose-based fiber.
A method for producing a flame-retardant woven fabric, comprising treating a woven fabric composed of 30% with an N-methylol cellulose-reactive resin and then subjecting the woven fabric to mechanical shrink-proofing.