JPS58156083A - Graying preventing process - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for processing a synthetic fiber fabric, which is intended to prevent the synthetic fiber fabric from becoming gray due to back contamination during dry cleaning.

When dry cleaning synthetic fiber fabrics, it often happens that white or light-colored synthetic fabrics darken, and this phenomenon is called graying. This graying phenomenon occurs because dirt accumulated in the dry cleaning bath back-contaminates the synthetic fabric. Since dry cleaning baths are solvent-based, their ability to suspend dirt is lower than that of water-based washing baths, and therefore dirt once removed from synthetic fiber fabric becomes fine particles and disperses in the solvent.
Its dispersion state was poor and redeposited on synthetic l1lili males.

Causes graying phenomenon. It is extremely difficult to remove the graying and return it to its original state.

In order to avoid this graying phenomenon during dry cleaning, in the current dry cleaning industry, care is taken such as washing lightly colored items with little dirt and items with heavy stains in separate baths. Despite this, there are cases where accidents occur during dry cleaning and are subject to serious criticism.

In addition to being prone to graying during dry cleaning, synthetic fiber fabrics also have the disadvantage of being easily charged with static electricity.For this reason, when worn, static electricity accumulates, causing problems such as lumps and the discomfort of electric shock. This is often a major hindrance. Therefore, when applying various finishing treatments to the synthetic 1itIn fabric, it is essential to use an antistatic agent in combination. However, as a result of investigating the correlation between the graying phenomenon in dry cleaning and fiber treatment agents, the inventors found that the more polar, such as durable antistatic agents, the more likely they are to accelerate the graying phenomenon.
We have learned that it absorbs dirt very easily.

The present inventors also discovered that ICs with weak polarity do not have a negative effect on graying, and that non-polar polysiloxane resins and melamine resins have the effect of preventing graying during dry cleaning. ,
A method for preventing graying during dry cleaning has already been reported in Japanese Patent Application No. 52-1344424jjl. However, this patent application
Even with No. 442, it is difficult to sufficiently prevent the graying phenomenon due to the shadow W of the antistatic agent, and the wash resistance of the antistatic property is also insufficient, so problems due to accumulation of static electricity occur again after washing. There was a drawback.

In view of the current situation, the inventors of the present invention have conducted intensive research, and as a result have succeeded in obtaining the method of the present invention which eliminates the above-mentioned conventional drawbacks. That is, in the present invention, a mixed water bath solution, mixed water dispersion, or mixed emulsion of a polysiloxane resin and a melamine resin is applied to a synthetic fiber fabric mixed with conductive fibers, and then dried.

This is a method for preventing graying of synthetic fiber fabric, which is characterized by heat treatment. The synthetic fiber fabric produced by the method of the present invention not only does not cause graying effects during dry cleaning, but also has long-term antistatic properties.

Hereinafter, the method of the present invention will be explained in detail.

The synthetic fibers used in conductive fibers are polymers that have fiber-forming ability, and include polyester, polyamide, and polyac IJ A/types. 5 In the method of the present invention, no matter which one is used, the effect will not change. do not have. The manufacturing time of the synthetic fiber refers to the period after polymerization until it is spun, and the term "conductivity" refers to the property of wood that conducts electricity, although it has low resistance. used.

In the method of the present invention, conductive fine powder is blended during the production of synthetic fibers and used as conductive am. That is, conductive carbon fine powder is mixed with a synthetic fiber polymer and then spun to form conductive m-fibers. Also.

Composite yarns composed of synthetic fibers containing conductive carbon fine powder as conductive fibers and synthetic fibers not containing conductive carbon may also be used in the method of the present invention, but
The composite yarn composed of two components here means that the two components are separated and independent from each other in the cross section of the composite yarn.
*Although the two components exist in almost the same shape in the cross section of any part of the doubling yarn, the shape of each component can be used regardless of the shape in the method of the present invention. However, it is necessary that the two components are independently and continuously connected in the length direction of the composite yarn.

The conductive fibers used in the method of the present invention preferably have an electrical resistance value of I x 101" Wα or less at 20°C x 40% RH. In the method of the present invention, the conductive fibers are mixed with other synthetic U&fibers. Synthetic m-fiber fabrics such as polyester fabrics, polyamide fabrics, polyacrylic M-nitri M-based fabrics, etc. are formed.

It means alternate knitting, alternate twisting, mixed spinning, etc. Any method of mixing may be used. Moreover, the polyester M yarn fiber includes polyethylene terephthalate and those copolymerized with polyethylene terephthalate and other monomers. The term "fabric" refers to sheet-like structures such as woven fabrics, knitted fabrics, and nonwoven fabrics.

The polysiloxane resin used in the present invention is dimethylpolysiloxane (m is an integer of 60 to 500) having a hydroxyl group directly bonded to silicon at the terminal, or methiVhydrodienepolysiloxane (n is 1
(an integer from 0 to 80) alone or as a mixture of both, and other polysiloxanes cannot provide a sufficient graying prevention effect.

Dimethylpolysiloxane has an average degree of polymerization of 30 to 5.
If the average degree of polymerization is less than 30, the resin itself will be unstable, and if it is more than 500, the viscosity will be too high and it cannot be used in practice. In addition, methi-V hedrodiene polysiloxane having an average degree of polymerization of 10 to 80 can be used; if the average degree of polymerization is less than 10, it is highly reactive and unstable, and if it is more than 80, it is difficult to manufacture. .

The polysiloxane resin used in the first aspect of the present invention varies depending on the type of resin and the form of the object to be treated.
It should be used in the range of 0.05% to 2%.

If it is less than 0.05%, sufficient graying prevention properties cannot be obtained, and if it is added more than 2%, not only is no improvement in the effect seen, but conversely, it causes negative effects such as a decrease in slip properties. There is a fear.

Among the melamine resins, A-M-V-E-TE-V-Methyl-M melamine resin has the best graying prevention effect, and in particular, Meth-V-E-TE-M-Trimethylo-I Remelamine NH-CIT, 0CH1 has excellent stability and resistance during processing. It is advantageous in terms of reactivity, etc.

7- Use of methylo-V melamine resin should be carried out at 0.05% to 5% per 1k of fiber cloth,
If it is less than 0.05%, a sufficient graying prevention effect cannot be obtained, and if it is used more than 5%, the antistatic properties will deteriorate and the texture will become hard.

It is possible to adjust the texture of the object to be treated by changing the ratio of the amounts of polysiloxane resin and melamine resin used, and to obtain a soft texture, use a large amount of polysiloxane resin,
Conversely, in the case of a hard texture, more melamine resin may be used.

In the present invention, it is desirable to use each catalyst in combination with the polysiloxane resin and melamine resin in order to obtain a graying prevention effect that can withstand repeated dry cleaning.

Organometallic lumps such as tin, lead or zinc are suitable as polysiloxane catalysts. As a catalyst for melamine resin, organic amine salts or inorganic metal salts can be used.

8- To apply the mixed emulsion M of the polysiloxane resin and etherified methylol melamine resin of the present invention to the synthetic fiber fabric mixed with conductive fibers, the fabric is immersed in the above mixed emulsion M and uniformly applied. It can be applied by squeezing or spraying. Thereafter, the fabric is dried and then heat treated. The heat treatment conditions are polysiloxane resin. Although it varies depending on the etherified methylolmelamine resin and each catalyst, it may be carried out at a temperature of 150 to 200°C for 20 seconds to 2 minutes.

According to the method of the present invention, there is no dirt adsorption due to the antistatic agent during dry cleaning, which occurs when an antistatic agent is added, and the graying prevention property is improved. Durability is also good.

The method of the present invention will be further explained with reference to the following example. The 1F resistance to graying during dry cleaning was measured as follows.

[Laboratory test]

(Aji dry cleaning method sample (1omx 10cIg) 3.J Contamination i (see below (
See Note 1) 1g, Charge Sheep 2 L water 0.2g
Pour 200 cc of perchlorethylene and 200 cc of perchlorethylene into a binder jar, and heat at 40°C using a rounder orator.
Dry cleaning was carried out for 2 hours, and then the sample was lightly rinsed with fresh Vacron Nure ethylene, the solvent was removed, and the sample was dried.

(Note 1) Contamination sources: 1:2:! A mixture at a ratio of 1:1 is used as a dye source.

■Dry cleaning shop 1 trowel collected distillation residue (artificial oily stains stearic acid (15%) 9 oleic acid (15%), hydrogenated beef tallow oil (15%), olive oil (15%), cetacea?reco -V (10%), cholesterol-ν (5%) and solid paraffin (25%) mixture - Dirt collected from a household vacuum cleaner - Car pump hook (Bl evaluation method (contamination rate)) Undry cleaned cloth The reflectance (at a wavelength of 480 mμ) of the dry-cleaned cloth and the dry-cleaned cloth was measured using a spectrophotometer. Calculated.

[Test at one dry cleaning shop] Processed fabrics were tied together and put into the dry cleaning shop 5 times.
The contamination rate was calculated using the same evaluation method as in the [laboratory test] for items that had been dry-cleaned 10 times. Furthermore, antistatic properties were evaluated as follows. AkuulLt test piece of 3011m x 3011m
Spread it on the ground metal plate covered with M fiber knitted fabric,
After rubbing strongly with a t11m knitted fabric at a speed of one layer, the test piece is placed in a Faraday Couge, the amount of electrical charge on the test piece is measured, and the amount of electrical charge is calculated per one go, which is defined as the electrical charge density. This test method is an indicator of ease of charging. The test piece is 10
After drying at 0° C. for 1 hour, it was left in a y atmosphere at 20° C. and 40% RH for 48 hours, and then measured.

Example 1 80 parts of nylon 6 chips and 20 parts of acetylene black were melt-mixed, cooled and formed into chips to obtain carbon black-dispersed nylon 6 chips X. Next, this nylon 6 chip
The fibers were spun and drawn at an x:y weight ratio of 2:8 to produce conductive fibers of 20 denier ν/4 filaments.

The conductive fiber and polyester? A mixed twisted yarn was created by twisting the Shiho Taka processed yarn 150 guny Lv/48 filament with 2110 T/731. This intertwisted yarn was made into a 150 denier v748 filament and inserted at a rate of 1 sewage when warping the bulky textured yarn 150 denier v748 filament.
This is a polyester layer using highly processed yarn 150 denier A//30 filament and warp density K 1202E/It.

A lie V fabric with a weft density of 80 was woven. The woven fabric is refined and dyed (fluorescent color) using a conventional method.

After heat setting, immerse in the bath of Ikkata 1 below and reduce the drawing rate to 7.
The sample was uniformly squeezed at 596°C, dried at 100°C for 5 minutes, and further heat-treated at 170°C for 60 seconds.

Formulation 1 D K-30020 parts by weight (manufactured by Shin-Etsu Chemical ■, polysiloxane resin emulsion: containing 40% polysiloxane resin) Catalyst OZ
2 parts by weight (Shin-Etsu Chemical 11 Catalyst for polysiloxane resin) Sumic Nuresin M-152fjik
Part (manufactured by Sumitomo Chemical ■, melamine resin) Sumitex Accelerator ACI O, Double I part (manufactured by Sumitomo Chemical ■, catalyst for melamine resin) Water
The performance of the fabric obtained at 975.8 parts by weight was measured and shown in Table 1.

For comparison with the method of the present invention, a comparative sample was prepared by the method of Comparative Example 1 shown in 9-order P and was compared with the method of the present invention. The results are shown in Table 1.

As shown in Table 1, the method of the present invention exhibits sufficient durability and prevents graying during dry cleaning, and also has excellent antistatic properties.

Comparative Example 1 4wt for the warp, no fibers used, and the other specifications are the same as the actual 11 A/Ml! After weaving the product, scouring it, dyeing it (fluorescent color), and heat setting it in the same manner as in Example 1, it was immersed in a bath of the following formulation 2, and then squeezed uniformly at a squeezing rate of 75g6, and then heated at 100°C for 6 minutes. After drying and further heat treatment at 170° C. for 30 seconds, a comparative example was prepared.

Formulation 2 D K-30020 parts by weight Talyst oz 2 parts by weight Sumitex Resin M-32 parts by weight Sumitex Accelerator A CX' 0.2-
IM kk part Sunstat ES-1120 blood value part (manufactured by Sanyo Chemical Co., Ltd., temporary antistatic agent) Water
955゜8 MM Department Patent Licenser Unitika Co., Ltd.

Claims (2)

[Claims] (1) During the production of synthetic fibers, conductive 'lR fibers mixed with conductive carbon fine powder are mixed with synthetic wrinkled fibers, and an average polymeric material having hydroxyl groups directly bonded to silicon at the terminals of 50 to 500 A polysiloxane consisting of a dime-100V polysiloxane or a methyM-hydrodiene polysiloxane having an average degree of polymerization of 10 to 80, alone or in a mixture of both.
to) 0.05% to 2% fat based on the weight of the fiber. Synthetic fiber characterized by applying a mixed aqueous solution, mixed aqueous dispersion, or mixed emulsion M melamine resin containing 0.05% to 5% of the weight of the fiber, followed by drying and heat treatment. Method for preventing graying of fabric. (2) The scope of the claim characterized in that the conductive li1 fiber is a composite yarn composed of two components: a synthetic fiber containing conductive carbon fine powder and a synthetic fiber containing no conductive carbon fine powder. The method for preventing graying according to item 1.