JPS595706B2 - Water-absorbent, stain-resistant acrylic fiber with excellent sewability - Google Patents

Description

Detailed Description of the Invention The present invention provides an acrylonitrile-based synthetic fiber that has excellent water absorption and recontamination resistance with excellent washing durability, and has improved knitted fabric yarn breakability during sewing, and a thread or yarn made of the fiber. Regarding fabrics.

Acrylonitrile fibers have a bulkiness similar to that of wool and have excellent heat retention properties, so they are widely used in sweaters, winter underwear, baby wear, etc.

However, since it is a hydrophobic fiber, it has drawbacks such as not absorbing sweat and being re-contaminated with repeated washing, resulting in black stains, and various methods have been proposed to improve this.

For example, block copolymerization of polyoxyethylene and caprolactam, and post-treatment using hydrophilic compounds with water-absorbing and antifouling properties such as polyethylene oxide derivatives of polyamides and ranogen derivatives are known.

On the other hand, acrylonitrile fibers, like polyester fibers, are damaged by friction during sewing with high-speed sewing machines, resulting in knitted yarn breakage. Smoothing agents are commonly used.

These smoothing softeners have the drawback of being water-repellent and being highly susceptible to staining with oil-based staining agents.

In order to improve water absorption and knitting yarn breakage during sewing, various studies have been attempted, such as mixing the water-absorbing agent with the softening and smoothing agent, or treating the agent in a separate process, but the water absorption and stain resistance have not improved. An acrylonitrile-based fiber knitted fabric satisfying the above requirements and having excellent sewability could not be obtained.

The inventors should improve this problem (as a result of intensive study,
The present invention has been achieved.

That is, in order to obtain permanent water absorption and stain resistance, a water absorption finishing agent that has an affinity for acrylonitrile fibers is used, and in order to improve the smoothness of the fiber without interfering with the water absorption and stain resistance effects of the water absorption finishing agent. Acrylonitrile fibers are treated with a softening and smoothing agent consisting of specific higher hydrocarbons, polyhydric alcohol esters, fatty acid amides, and polyoxyethylene surfactants.

In the present invention, when each of these materials is treated alone, the desired effects of the present invention, namely, excellent water absorption, antifouling properties, and excellent sewability cannot be obtained.

Furthermore, if the above-mentioned water-absorbing finishing agent is used in combination with other general softeners, the water-absorbing property will be impaired, or if the water-absorbing property is satisfied, sufficient sewability will not be obtained.

On the other hand, even when the above-mentioned mixed softening and smoothing agent was used with other general water-absorbing finishing agents, the above-mentioned water absorption, antifouling, and sewability properties were not obtained, and the combination of the water-absorbing finishing agent and the softening and smoothing agent of the present invention was particularly excellent. It is effective.

Acrylonitrile fibers as used in the present invention are mainly composed of acrylonitrile (hereinafter referred to as AN) and copolymerized with methyl acrylate, methyl methacrylate, sodium styrene sulfonate, sodium allylsulfonate, and 2-methyl for the purpose of imparting dyeability. Also included are acrylonitrile fibers copolymerized with one or more types of -5-vinylpyridine and the like, and acrylonitrile fibers copolymerized or blended with vinylidene chloride and the like for the purpose of imparting flame retardance.

Note that the fiber may be in the form of thread or fabric, or in a stable state.

Furthermore, the processing agent that imparts permanent water absorption and stain resistance is defined by the general formula (
1) (hereinafter referred to as compound 1) (wherein R is hydrogen or a methyl group, R1 is a hydroxyl group,
Halogen, C18 or less alkoxy group, sulfide group,
phenoxy group, naphthoxy group, and t and m are O≦
m≦7.10≦t.

) It is a copolymer mainly composed of 60 to 90 weight ratio and ANIO to 40 weight ratio.

However, in general, a divinyl compound is mixed as a by-product during the synthesis of Compound 1, but of course, this mixing does not impede the present invention.

Furthermore, ammonium persulfate and other compounds used to obtain the present copolymer do not impede the present invention.

Compound 1 in the present invention refers to polyalkylene glycol acrylates or polyalkylene glycol methacrylates, such as polyethylene glycol (hereinafter referred to as PEG) acrylate, PEG methacrylate, PEG polypropylene glycol acrylate, PEG polypropylene glycol methacrylate,
Methoxy PEG acrylate, ethoxy PEG methacrylate, propoxy PEG acrylate, chlorinated PE
G acrylate, phenoxy PEG acrylate, naphthoxy PEG acrylate, hydrogen sulfide P
Examples include EG acrylate.

The softening and smoothing agent that improves the sewability during sewing with a high-speed sewing machine is at least one of the following compounds 2 to 5.
This is a mixed composition containing seeds and compound 6.

Compound 2: Higher hydrocarbon having 25 to 33 carbon atoms.

If the number of carbon atoms is 24 or less, the melting point will be low and smooth. Lacks sex.

On the other hand, if it is 34 or higher, the melting point will be high and the texture will be impaired.

Compound 3: Esters of polyhydric alcohols having 3 to 6 carbon atoms and fatty acids having 14 to 18 carbon atoms, such as glycerin, pentaerythritol, sorbitan, etc., and fatty acids obtained from beef tallow such as palmitic acid and stearic acid. Esters are preferred.

Compound 4: Aliphatic amide derivative of a fatty acid having 12 to 17 carbon atoms and an amino alcohol, such as HOCH2CH2NH2.

Compound 5: Water-soluble silicone compound.

For example, a water-soluble silicone compound that is a copolymer of methylsiloxane or methylhydrogensiloxane having 5 to 80 repeating units of methylsiloxane and a compound having a polyoxyethylene segment having 12 to 25 repeating ethylene oxide units.

Compound 6: Polyoxyethylene surfactant.

For example, the number of moles of ethylene oxide added is 10, and the number of carbon atoms in the alkyl group is 9 to 17 with alkylamine ethylene oxide The number of moles of additives and ethylene oxide added is 12-22 and the number of carbon atoms in the alkyl group is 9-22 18 alkyl ether type surfactants, Has an alkyl group having 9 to 12 carbon atoms Ethylene oxy to alkylphenol Alkyl to which 10 to 14 moles of phenol ether type surfactant, Rui is a mixture of these.

Above, at least one of compounds 2 to 5 among compounds 2 to 6
A mixed composition necessarily containing the seed and compound 6 is used as a softening and smoothing agent.

For treatment with the above composition, the object to be treated in the form of fibers, threads, or fabrics is immersed in a bath at 10 to 80°C for 1 to 20 minutes and then dried in the usual way, or in the form of fabric, it can be treated as in ordinary resin processing. It may be dried after being attached by a banding method.

If the fibers obtained by such treatment are long fibers, they are knitted as they are.

In the case of short fibers, they are knitted after being spun.

When processed in the form of spun yarn, it is knitted as is, and these knitted fabrics exhibit excellent water absorbency, stain resistance, and excellent sewability with washing durability.

Of course, it is also effective even if the composition drastic process is performed.

Hereinafter, the present invention will be specifically explained with reference to Examples.

Example I A copolymerized acrylonitrile fiber consisting of 94.5 moles of AN, 5 moles of methyl acrylate, and 0.5 moles of sodium styrene sulfonate, 3 denier, fiber length 76-, was spun to a hair count of 1/60. On the other hand, a yarn was obtained by polymerizing 1966% by weight of mixed monomers and 700% by weight of AN30 in an aqueous solution having a concentration of 22% by weight to synthesize a water-absorbing finishing agent.

In addition, 10% paraffin mixed with equal amounts of C26H54, C2□H56, and C16H33COOH in pentaerythritol.
5% alcohol ester obtained by reacting mixed fatty acid with Cl8H37COOH of 4:6, 3% fatty acid amide compound obtained by reacting jetanolamine with C□2H25COOH, and 10 moles of ethylene oxide added. Alkylamine with 12 carbon atoms 2.5
%, the number of moles of ethylene oxide added is 12, the number of moles of ethylene oxide added is 12, the alkyl ether having 9 carbon atoms is 2.5%, the number of moles of ethylene oxide added is 100, and the soft smooth material is composed of 2 units of nonylphenol ether type surfactant and the remaining 75% is water. A drug was prepared.

The 1/60 spun yarn was dyed with cheese using a pancage dyeing machine in a conventional manner, and then washed once with hot water, and 3.5 g/l of the water-absorbing finishing agent and the softening agent 1.
It was immersed in a 5 g/l aqueous solution at 45° C. for 10 minutes at a bath ratio of 1:10.

The treated system was dehydrated by suction until the moisture content was 50%, and then dried in a cheese dryer at 80°C for 20 minutes (
Let this processing system be A1.

). On the other hand, a cheese thread treated in a liquid at 45°C in which only 1.5 g/7 of the softener was dispersed and dried in the same manner as the sample A1 was designated as A2.

In addition, 3.5 g of the same water-absorbing agent used for the sample of A workpiece was added.
Cheese threads treated in the same manner as A1 in a solution of only A3
shall be.

45°C with 3.5 g/l of water absorption agent used for sample A1
After processing for 10 minutes, drain the water, and then treat the sample at 45℃ for 10 minutes with 1.5 g/7 of the softener used in A0.
shall be.

The untreated system is A. shall be.

Above A.

-A fabric weight of 135g/? using 1/60 spun yarn of A4 ? Z″
A knitted fabric with a jersey texture was knitted.

After knitting, use a heat cent machine to centrifuge at 90℃ for 30 seconds,
The following sewing tests and water absorption and stain resistance tests were conducted.

In addition, in order to check the washing durability of this treatment, chemical soap detergent N Zabu // 2 g
Washing was repeated 20 times using a Toshiba electric washing machine.

(1) Sewability test 2 Industrial sewing machine JuKI DDL-
555, use sewing machine needle #14 to 3
2 with 15 stitches/3cm stitches at sewing machine speed of 000 stitches/min.
Sew at 0cm intervals.

Sewability is evaluated by the number of cuts in the knitting thread during sewing.

If the number of cuts is 33 or less, it will be considered a pass.

(2) Water absorption test): Drop 0.03 cc/drop of water onto a horizontally stretched sample using a pipette, and measure the time until the water droplets are completely absorbed into the knitted fabric.

If it is 20 seconds or less, it is considered good.

(3) Antifouling property: Contamination with 5 cc of the following contaminating agent and 200 cc of water.
sionFluid 300 g Coal tar 3 Portland cement 5 Super “Zabu”
5 liquids and 10. zX Put two 10cm samples and process them in a Roundada meter at 60℃ for 30 minutes, then take out the samples and add 2g/l of neutral detergent.
Wash the Tough with cold water for 5 minutes in a Toshiba electric washing machine on gentle conditions.

After drying, the sample is judged on a gray scale for contamination.

It is good if it is grade 3 or higher. Table 1 shows the results of evaluating the sample using the test method described above.

This result shows that all performances can be satisfied only by using a water absorbing agent and a smoothing agent in combination.

Example 2 Using the same acrylonitrile fiber as in Example 1, the hair count was 1.
/48 spun yarn and pear, then 300 g/? ? A knitted fabric of Z2 with pontiloma structure was obtained.

After dyeing the main knitted fabric by a conventional method, acrylate 85 having a polypropylene oxide segment with a molecular weight of 1500 is dyed.
A water absorbing agent was obtained by polymerizing weight year and AN25 weight rate in an aqueous solution with a weight concentration of 25%.

Furthermore, it contains 10% of C25H5° paraffin, 10% of ester obtained by reacting pentaerythrite with Cl8H3□C0OH, and 50% of a copolymer of dimethylpolysiloxane with 13 repeating units of dimethylsiloxane and polyoxyethylene. 3% of water-soluble silicone, 2.5% of the same polyoxyethylene alkylamine used in Example 1, 2.5% of polyoxyethylene-added alkyl ether, and 100 moles of ethylene oxide added. A softening and smoothing agent was prepared consisting of 2% phenol ether type surfactant and the remaining 75% water.

After immersing the punchiloma in a treatment solution containing 10 g/l of the above water absorbing agent and 3 g/l of the present softener, centrifugal dehydration was performed to reduce the amount of liquid adhesion to 6.
I narrowed it down to 0%.

Thereafter, it was dried at 90°C (this sample is designated as B1).

On the other hand, the knitted fabric was immersed in an aqueous solution containing 10 g of a water-absorbing finishing agent made of a ranogen derivative, and then subjected to the above-mentioned centrifugal dehydration treatment to give a coating weight of 60%.

Thereafter, it was dried at 90°C to obtain sample B2.

The untreated knitted fabric was designated as Bo, and these Bo-B2 samples were subjected to a sewing test and a water absorption and stain resistance test in the same manner as in Example 1.

The results are shown in Table 2, and Bo was the only sample that satisfied all the items.

Claims (1)

[Scope of Claims] 1. A water-absorbing and stain-resistant acrylic fiber treated with an aqueous solution or aqueous dispersion containing the following composition A and composition B below. A copolymer mainly composed of a compound represented by formula (I) of 60 to 90% by weight and acrylonitrile of 10 to 40% by weight. (However, R is H or CH3, R1 is C1, Br. I, OCH3, OC2H5, 5CH30≦m(10゜t
≧10) B: Higher hydrocarbon having 25 to 33 carbon atoms, 3 to 6 carbon atoms
esters of polyhydric alcohols with fatty acids having 14 to 18 carbon atoms, aliphatic amides obtained by reacting fatty acids with 12 to 17 carbon atoms and amino alcohols, and water-soluble silicone compounds. A mixed composition of at least one compound and a polyoxyethylene surfactant.