JPH04202852A - Soil-resistant, yellowing-preventing white polyamide yarn cloth - Google Patents

Abstract

PURPOSE:To obtain the title cloth excellent preventing redeposition during washing and adhesion of dust in air, comprising white cloth made of nylon multifilament yarn prepared by adding a fluorescent brightener to a specific polyamide by treating the cloth with a nonionic yarn fishing agent. CONSTITUTION:A polyamide having <=10g equivalent/10<6>g amino end group obtained by adding triaryloxy-s-triazine is blended with 0.005-0.2wt.% (preferably 0.01-0.1wt.%) benzoxazole-based fluorescent brightener to give nylon multifilament yarn. Then white cloth obtained from the yarn is treated with a nonionic yarn fishing agent to give the objective cloth.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a white polyamide fiber fabric that is good in preventing recontamination during washing and in preventing the adhesion of dust in the air, and is resistant to yellowing. be.

(Conventional technology) Because polyamide fibers have amino end groups.

Although it has the advantage of being easily dyed with acid dyes, it has the problem of being susceptible to yellowing due to heat, oxidative deterioration, light, gas, or wrapping paper.

Conventionally, as a method for preventing yellowing of polyamide fibers, particularly yellowing caused by wrapping paper materials, there has been no effective method of modifying polyamide fibers, and various methods of modifying wrapping paper materials have been proposed. For example, a method has been proposed in which a solution of a specific compound is applied or impregnated onto the inner liner of a wrapping paper material or a cardboard packaging container (Japanese Patent Publication No. 56-48640
No. 60-7759, etc.).

Also, as a way to prevent yellowing caused by gas.

A method for reducing the amount of amino terminal groups in fibers has been proposed. A method for obtaining ~30g equivalent/106g is disclosed. However, with this method, it was not possible to prevent yellowing due to the wrapping paper material.

Yellowing is a particular problem with white products, and there is also the problem that ordinary polyamide fibers themselves do not have enough white charcoal.

Furthermore, since polyamide fiber itself is hydrophobic, airborne dirt may adhere to it during handling, or it may become stained due to contact during processing or wearing.
It has the disadvantage that recontamination easily occurs during washing. Among these measures, measures such as the use of antistatic yarn and the combined use of antistatic agents have been taken to prevent the adhesion of dirt floating in the air, and these measures have been relatively successful. As for ways to prevent re-contamination, methods have been proposed, such as applying a reserved parent wood treatment to the fibers so that they can be easily removed even if they become dirty, and adding a fluorine-based water repellent to make the fibers less likely to attract dirt. Yes.

In both cases, finishing methods are limited.

- It has drawbacks such as difficulty in removing dirt once it starts to accumulate, and is not sufficient.

In addition, polyamide fibers have advantages such as good dyeability with acid dyes due to the amino group they have at the end of each molecule, but they also have problems such as thermal oxidative deterioration, yellowing due to light and gas, and yellowing due to wrapping paper materials. be.

(Problem to be solved by the invention) The present invention was made in view of the above-mentioned current situation.

The object of the present invention is to obtain a white fiber fabric using polyamide fibers, which has antifouling properties such as prevention of re-staining during washing, prevention of adhesion of clumps, and prevention of yellowing caused by packaging materials.

(Means for Solving the Problems) The present invention achieves the above-mentioned objects and has the following configuration.

That is, in the present invention, the amino terminal group is 10 g equivalent/10
A white fabric made of nylon multifilament yarn made of 5g or less of polyamide and containing 0.005 to 0.2% by weight of a benzoxazole optical brightener, which is treated with a non-cationic fiber finishing agent. The object of the present invention is to provide a stain-resistant and yellowing-resistant white polyamide fiber fabric.

The present invention will be explained in detail below.

To obtain the white polyamide fiber fabric of the present invention.

First, when producing polyamide fibers by the melt spinning method, triaryloxy-3-)riazine is added and reacted to limit the amount of amino terminal groups to 10 g equivalent/105 g or less, and a benzoxazole fluorescent brightener. 0
．． It is necessary to add and contain 0.05 to 0.2% by weight.

As the triaryloxy-3-)riazine mentioned herein, those described in Japanese Patent Publication No. 46-5068 can be used, as specific examples.

Examples thereof include triphenyl-8-cyanurate, tris(p-methyl-phenyl)-8-cyanurate, tris(p-t-butyl-phenyl)-8-cyanurate, and the like.

Triaryloxy-3-)! The appropriate amount of JT lyazine is 0.7 to 2.5 times, preferably 0.9 to 2.3 times, the amount of amino end groups in the polyamide.

With the addition amount within this range, the amount of amino terminal groups in the polyamide can be made 10 g equivalent/105 g or less without impairing the spinning properties. If the amount of amino terminal groups exceeds 10 g equivalent/106 g, yellowing of the polyamide fiber cannot be prevented.

As the benzoxazole optical brightener used in the present invention, East Bright B-1 (trade name) commercially available from Eastman Kodak Company is preferably used.

The amount of the optical brightener added must be 0.005 to 0.2% by weight, preferably 0.01 to 0.1% by weight. If the amount added is less than 0.005% by weight, the effect of improving the white charcoal of the fiber is insufficient;
If it exceeds 0.2% by weight, not only the improving effect of white charcoal is saturated, but also the fibers tend to yellow, which is not preferable.

The polyamide fiber of the present invention produced in this way is
The reason is not clear, but as a result of tests on re-staining properties through repeated washing and dust adhesion prevention properties, it was found to have excellent anti-fouling properties.

The polyamide used in the method of the present invention is not particularly limited as long as it can be melt-spun, but representative examples include Suylon 6, Nylon 66, and Nylon 46.

Naturally, polyamide fibers are coated with a white inorganic compound such as titanium dioxide as a matting agent of 0.2 to 3.
It may be contained in an amount of about 0% by weight.

The above-mentioned polyamide fibers may be knitted or woven as raw yarns,
Alternatively, the fabric may be knitted or woven after false twisting or air entangling treatment. After relaxing scouring, the knitted and woven fabric is treated with an anionic or nonionic so-called non-cationic fiber finishing agent.

The polyamide fiber fabric of the present invention uses a so-called white dope dye system in which white agents such as white dyes and pigments are kneaded into the fibers during fiber production, so the dyeing process is omitted and the fabric is manufactured using a continuous relaxing scouring machine or a wince. 60 using a jet dyeing machine etc.
It is sufficient to perform a very general relaxing scouring process using hot water of about 100°C.

Thereafter, it is treated with an anionic or nonionic non-cationic fiber finishing agent.

In general, synthetic fiber fabrics generate static electricity when they are cut or sewn. Since problems with steadying may occur, antistatic agents are added to the fabric in the final finishing process, or silicone-based agents are added to improve sewing performance.

A softening agent such as a polyethylene-based softener may be used in combination, but in any other case, including these treatments, it is necessary to apply some type of finishing agent. In the present invention,
For this finishing, it is essential to finish with a non-cationic fiber finishing agent such as anionic or nonionic, and care must be taken as treating this with a cationic finishing agent will significantly reduce the stain resistance. be.

Specific examples of non-cationic fiber finishing agents include:

In the case of anionic types, Sunstat ES-11 (manufactured by Sanyo Kasei ■, antistatic agent), Royal Soft) A-10 (manufactured by Ichisha Yushi ■, softener), Destara) FN-40 (manufactured by Kyoeisha, antistatic agent) ), wet silicone EP-68 (manufactured by Nichika Kagaku ■, softener), etc. In the case of nonionics, examples include Vicron 75N (manufactured by Ichigosha Yushi ■, softener), Filan 0-6 (manufactured by Ichigosha Yushi ■, softener), etc. Asahi Guard AC, -730 (manufactured by Kasei Kagaku ■, water repellent), etc. can be mentioned.

The treatment with a non-cationic fiber finishing agent may be carried out by a conventional treatment method widely used in the industry, such as a dipping method, a dip-nip method, or a spray method.

The stain-resistant and anti-yellowing white polyamide fiber fabric of the present invention can be obtained by the above method.

(Function) According to the present invention, the amino terminal group of the polyamide fiber is
If you limit it to g equivalent/105g or less.

This makes it less susceptible to attack by light, heat, nitrogen oxide gas, etc. in the air, and improves yellowing prevention properties.

If there are few amino terminal groups, it is not possible to obtain a good white skin by dyeing, but if the required amount of whitening agent is mixed in during fiber production as in the present invention, the amount of amino terminal groups in the fiber will be reduced. Regardless, it is possible to ensure sufficient white skin.

When a white fabric made of the specific polyamide fibers mentioned above is treated with an anionic or nonionic, so-called non-cationic fiber finishing agent, the white fabric can retain its stain resistance well. However, its effect has not yet been elucidated.

(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.
The performance of the fabrics in Examples was measured and evaluated using the following method.

(1) Anti-fouling property■ Preventing re-staining after washing 0.75g of a synthetic pollution source made by mixing the following oil-based staining agent and dry staining agent in a ratio of 3:1, )! J polyphosphate soda 5g,
Sodium laurylbenzenesulfonate 5 was dispersed into 11 with distilled water to prepare a recontamination solution.

[Oil-based staining agent]

Stearic acid 12.5% by weight oleic acid
12.5 Hydrogenated oil 12.5 Olive oil 12.5 Heptyl alcohol 8.5 Solid paraffin 21.5 7'Cholesterol 5.ON Total 100.0% by weight [Drying stain agent] Clay 55.0 Weight% Portland cement 17.0 7' Ferric oxide 0
．． 5 T-decane 8.75/' Carbon black 1.75" Total 100.0% by weight Next, J
Using a rounder meter tester used in the washing fastness test method of IS-L-0844, 200 bottles of the above-mentioned recontamination solution and 10 steel balls used in the above washing fastness test method were placed in a test bottle and cut into 5 cm x 5 cm. A test piece of white cloth was wrapped in four layers, sealed, and treated at 40±2° C. for 1 hour.

After this, the test piece was taken out and rinsed with running water, and further washed with 100 rrtf of water at 40°C. After washing with a rounder meter for 10 minutes.

Take out the test piece, rinse it with running water, and soak it again in 25°C water 1.
00m7! Wash with a rounder meter for 10 minutes,
After repeating rinsing with running water twice, it was dehydrated and dried in a tumbler.

After drying, the grade was determined using a gray scale for contamination. Judgment is made on a 5-level scale, with 5th grade being good with no recontamination observed, and 1st grade being significant recontamination (darkening).
shows.

■　Dust adhesion prevention property A set of two samples is 20 cm x 15 cm.

Eight types of JIS-Z-8901 test dust (source of dirt) using Kanto loam layer as dust were weighed as sample weights,
After putting the two samples in a plastic bag at the same time and sealing them with a little air, they were processed for 1 hour using a JI 5-L-1076 pilling tester, and the state of dust adhesion was determined using a gray scale for contamination. do.

Judgment is made on a five-level scale, with grade 5 indicating no dust adhesion and good condition, and grade 1 indicating significant dust contamination.

(2) Anti-yellowing property ■ Yellowing sample due to wrapping paper material 5 cm x 6 cm and packaging ball 60 m x 6
After immersing the sample in 0.5 cc of water, it was wrapped in an aluminum wheel, and after 100 hours at 80°C, it was judged using a gray scale for contamination.

Judgment is made on the 5th grade, with grade 5 indicating no yellowing at all and grade 1 indicating significant yellowing.

(2) Light resistance An irradiation test is carried out according to J I 5-L-0842 (carbon arc method), and the degree of discoloration is judged on a blue scale.

Example 1 Relative viscosity 2.70 and amino end groups 62 g equivalent/10
1000 parts of 6g nylon 6 dry chips.

Triphenol-8-cyanurate 15i and East Bright 0B-1 (manufactured by Eastman Kodak, benzoxazole optical brightener) were added and mixed at 0.02% by weight, and the residence time up to the spinneret was determined at a spinning temperature of 270°C. After spinning at 800 m/min for 15 minutes, it was drawn at a drawing speed of 500 m/min and a draw ratio of 4 times to obtain a nylon multifilament fiber thread of 70 d/24 f. The amount of amino terminal groups at this time was 5 g equivalent/105 g as a result of chemical analysis.

Using this thread, the warp density is 100 threads/inch and the weft density is 70 threads.
After weaving the plain weave of 1/2 inch, we used a circular dyeing machine (manufactured by Hisaka Seisakusho, liquid jet dyeing machine) in combination with caustic soda Ig/J and surfactant 1g/f to perform relaxing scouring for 90t x 20 minutes. After washing with water and drying, fiber finishing agent Sunstats) E
S-11 (manufactured by Sanyo Kasei ■, anionic antistatic agent) 1.
0%0,w,f.

Heat setter (manufactured by Jukin Industries, Tenter)
Final setting was performed at 170° C. for 30 seconds to obtain a stain-resistant and anti-yellowing white fabric of the present invention.

Comparative Example 1 Fiber finishing agent Sunstat ES-11 used in Example 1
Instead of TA-267 (manufactured by Kao Soap ■).

A white fabric for comparison was obtained under exactly the same conditions as in this example except that a cationic antistatic agent (cationic antistatic agent) was used.

Comparative Example 2 A comparative white color was produced in the same manner as in Example 1, except that the amount of the optical brightener Yeastbrite ○B-1 added during spinning was reduced to 0.002% by weight. I got the fabric.

Comparative Example 3 In Example 1, no optical brightener was used during spinning.
After relaxing scouring, UVITBX BBF (1 dispersion optical brightener manufactured by Ciba Geigy) 1% O, W, F, 1
A comparative white fabric was obtained in the same manner as in Example 1, except that ordinary white dyeing was carried out at 00° C. for 20 minutes.

Comparative Example 4 A white fabric for comparison was obtained in exactly the same manner as in Example 1 except that the amount of triphenyl-S-cyanurate used was 10 parts.

Comparative Example 5 A white fabric for comparison was obtained in exactly the same manner as in Example 1, except that the addition of triphenyl-S-cyanurate was omitted.

Comparative Example 6 In this Example 1, the addition of triphenyl-S-cyanurate and Yeastbright 0B-1 was omitted during spinning, and after relaxing scouring, Whitex RP (manufactured by Sumitomo Chemical ■,
Acid type optical brightener) 1% O, W, F, 100℃X
A white fabric for comparison was obtained in exactly the same manner as in this example except that white dyeing was carried out for 20 minutes.

The performance of the present invention and a comparative white fabric was measured.

The results are shown in Table 1.

As is clear from Table 1, the white fabric of the present invention has antifouling properties,
Both properties were excellent in preventing yellowing.

(Effects of the Invention) According to the present invention, a white polyamide fiber fabric having antifouling performance and anti-yellowing performance can be obtained through relatively simple treatment operations in the spinning process.

Claims (1)

[Claims] (1) A white fabric made of nylon multifilament yarn made of polyamide with an amino terminal group of 10g equivalent/10^5g or less and containing 0.005 to 0.2% by weight of a benzoxazole fluorescent brightener. A stain-resistant and anti-yellowing white polyamide fiber fabric, the fabric being treated with a non-cationic fiber finishing agent.