JPH04108180A - Production of antifungal antifouling white cloth - Google Patents

Abstract

PURPOSE:To obtain the title cloth excellent in stain removability through washing by incorporating a specific block copolymer in a synthetic fiber cloth produced by incorporation of a fluorescent whitening agent in the fiber production and by imparting said cloth with a specific antifungal agent and melamine derivative. CONSTITUTION:A cloth incorporated with 0.01-0.3wt.% of a fluorescent whitening agent, comprising a synthetic fiber spun using e.g. polyethylene terephthalate is incorporated with >=0.8wt.% of an aromatic polyester-polyether block copolymer, and the resulting cloth is immersed in an aqueous solution containing a quaternary ammonium salt-based antifungal agent and melamine derivative compound followed by squeezing, drying and then heat treatment, thus obtaining the objective antifungal, antifouling white cloth ready to remove through washing the oily and water-based stains, etc., developed in its wearing. The present cloth is optimal for car sheet covers, sanitary gowns etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for producing a white fabric having antibacterial properties and excellent stain removal properties upon washing.

(Prior art) Synthetic fibers generally have various characteristics such as high strength, excellent one-dimensional stability, and good color fastness, but compared to natural fibers, synthetic fibers are less hydrophilic. This is a problem in the clothing field, which is uncomfortable to wear, causes unpleasant discharge noises and sticks to the body when putting on and taking off due to static electricity, and darkening of soiled areas due to poor dirt removal during washing. This had become a problem.

On the other hand, in recent years, there has been an increasing demand for comfortable clothing and a healthy living environment, and antibacterial and deodorizing treatments have been attracting a lot of attention. Usually, antibacterial and deodorizing treatments are
There are many methods in which antibacterial agents mainly consisting of quaternary ammonium salts are added during post-processing.

However, fabrics treated with quaternary ammonium salts have the disadvantage that their ability to remove stains by washing is significantly reduced.

To address the above-mentioned drawbacks, first, methods for improving stain removability by washing include (1) After pretreatment with an alkali, a hydrophilic agent having a functional group for epoxy groups and two or more glycidyl groups are used. (Japanese Patent Publication No. 50-13880).

(2) A method in which a special surfactant, acid, water-soluble salts, etc. are added to an aqueous dispersion of a polyester polyether block copolymer, and the mixture is treated in a treatment solution at a specific set temperature (Japanese Patent Publication No. 53-197-1) (No. 46960), (3) a method of pre-filtering the fibers so that they can be easily removed even if they become dirty, and (4) a method of making the fibers less likely to attract dirt by adding a fluorine-based water repellent. Several methods have been proposed, but none are satisfactory.

On the other hand, there has been no effective method to prevent the deterioration of stain removability during washing due to antibacterial and deodorizing treatment.

(Problem to be solved by the invention) In particular, fluorescent whitening products used for car seat covers, sheets, white coats, sportswear, socks, etc. that require repeated washing have both stain removal properties and antibacterial properties. The product is in demand.

With the conventional methods described above, it has not been possible to obtain products that have good stain removability when washed and also have antibacterial properties, which is a problem in the industry that handles optically brightened textile products.

BACKGROUND OF THE INVENTION It has long been desired to develop a stain-resistant white fabric that has antibacterial properties and has excellent stain removability when washed.

(Means for Solving the Problems) In view of the current situation, the present inventors have conducted extensive research and have found that white dyed yarn is less likely to be re-stained than white post-dyed fabric using fluorescent dyes. Furthermore, if you use a limited aromatic polyester polyether block copolymer and then use a quaternary ammonium antibacterial agent and a melamine resin derivative, you can create an antibacterial agent with surprisingly excellent stain removal properties during washing. It was discovered that a white-colored fabric with the same properties could be obtained.

We have arrived at the present invention.

That is, in the present invention, 0.00% of the optical brightener is added during the production of fibers.
0.01 to 0.3% by weight of a synthetic fiber, the aromatic polyester polyether block copolymer is added to the fabric in an amount of 0.8% or more based on the weight of the fabric, and then a quaternary ammonium salt is added to the fabric. The gist of the present invention is a method for producing a stain-resistant white fabric having antibacterial properties, which is characterized by applying an antibacterial agent and a melamine derivative compound.

Hereinafter, nine aspects of the present invention will be described in detail.

The synthetic fiber referred to in the present invention is polyester-based.

Synthetic fibers such as polyamide-based and polyacrylonitrile-based fibers are used.In the present invention, a fluorescent whitening agent is mixed into chips in advance during production of these synthetic fibers, and this is then spun.

The term "fabric" used in the present invention refers to a fabric mainly made of the above synthetic fibers, but these synthetic fibers may be blended with other fibers, such as natural fibers such as cotton, hemp, and wool, or semi-synthetic fibers such as rayon and acetate. , mixed weave, and mixed knitted hats may be used.

Fluorescent brighteners include pyrene, oxazole, coumarin, thiazole, and imidazole.

Imidacylon series, pyrazole series, and benzidine series.

Examples include fluorescent brighteners such as diaminocarbazole type, naphthalic acid type, and diaminostilbendisulfonic acid type. Among these, oxazole optical brighteners, which have good white peel and excellent acid resistance, can be preferably used.

The amount mixed into the fiber is 0.01 based on the weight of the fiber.
It is necessary to use ~0.3%; if it is used in an amount greater than 0.3%, yellowing occurs, and if it is less than 0.01%, good white skin cannot be obtained. The preferred mixing amount is 0.05 to 0.
．． It is 15%.

Although the reason for this is not clear, products in which optical brighteners are mixed into the fibers during fabrication using this method are less likely to remove stains when washed with water than products that have been optically brightened using the normal post-dyeing method. turned out to be excellent.

In the present invention, first, the fabric is made mainly of synthetic fibers that are made by mixing an optical brightener during the production of the fibers.

It is essential to contain an aromatic polyester polyether block copolymer.

The aromatic polyester polyether block copolymer herein means a block copolymer consisting of terephthalic acid and/or isophthalic acid and alkylene glycol and polyalkylene glycol. Use in the form of a dispersed emulsion.

This emulsion can be applied to the fabric by any method such as an impregnated pad method or an exhaustion method, and is not particularly limited. However, in order to apply it more evenly, the exhaust method is most appropriate.

In addition, in order to obtain outstanding performance and durability with the present invention,
When applying the block copolymer to a fabric, it is necessary to apply the block copolymer in a solid content of 0.8% or more based on the weight of the fabric.

In the present invention, first, a quaternary ammonium salt-based antibacterial agent and a melamine derivative compound are applied to the fabric.

The quaternary ammonium salt antibacterial agents mentioned here include octadecylmethyl-benzylammonium chloride,
Polyoxyethylenetrimethylammonium chloride, p-yneoctylphenoxyethoxyethyldimethylbenzylammonium chloride, dodecyldimethyl (
Examples include 2-phenoxyethyl) ammonium bromide, cetyldimethylbenzylammonium chloride, and the like. Among quaternary ammonium salt-based antibacterial agents, silicon-containing quaternary ammonium salts such as 3-(trimethoxysilyl)probyldimethyloctatedylammonium chloride, which are commonly used in textile products, have a hydrophilic effect. Because it inhibits.

This is not preferred in the method of the present invention.

The amount of quaternary ammonium salt-based antibacterial agents used varies depending on the type of antibacterial agent, but when considering antibacterial effect, cost, etc.
A content of 0.1 to 10% based on the fiber weight is preferred.

Melamine derivative compounds used in the present invention include hexamethylolmelamine, trimethylolmelamine, pentamethylolmelamine, hexakismethoxymethylolmelamine, trismethoxymethylolmelamine, trismethoxymethylmelamine, dimethylolmelamine, bismethoxymethylmethylolmelamine, and the like. Of these, tehexamethylolmelamine and trimethylolmelamine are particularly preferably used. The amount of the melamine derivative compound to be used may be appropriately determined depending on the application and is not particularly limited, but when consideration is given to texture, cost, etc., it is preferably about 0.1 to 3.0% based on the weight of the fiber.

When using a melamine derivative compound, it is desirable to use a catalyst such as a nitrate, a halide, a borofluoride, an inorganic acid, an organic acid, etc. in an amount of 10 to 100% based on the amount of the melamine derivative compound used.

The quaternary ammonium salt and the melamine derivative compound may be applied to the fabric by a known method such as an impregnated pad method, a spray method, or an exhaustion method. When both are contained, they may be applied at the same time or separately in a two-stage process, and there is no particular limitation in the present invention.

The present invention has the above-mentioned structure. 1. After incorporating an aromatic polyester polyether block copolymer into the so-called "white original system" in which a fluorescent brightener is kneaded into synthetic fibers, quaternary ammonium It is unique in that it contains a salt-based antibacterial agent and a melamine derivative compound.

(for production) The white fabric obtained by the production method of the present invention is as follows.

The synergistic effect of the use of synthetic fibers containing 0.01 to 0.3% by weight of optical brightener and the adhesion of aromatic polyester polyether block copolymer makes it extremely It has excellent stain removal properties during washing. Furthermore, due to the combined treatment of a quaternary ammonium salt-based antibacterial agent and a melamine derivative compound, a resin film of the melamine derivative compound formed on the fiber surface has a stain adhesion prevention effect, and the stain removal by the quaternary ammonium salt-based antibacterial agent It is possible to obtain antibacterial properties whose properties are prevented from decreasing.

The fabric obtained by the production method of the present invention has a fluorescent whitening agent mixed in during fiber production, so it has good white skin, which is coupled with excellent stain removability during washing.

It becomes a stain-resistant white fabric with antibacterial properties that maintains its white skin for a long time.

(Example) Next, the method for manufacturing the stain-resistant white fabric of the present invention will be specifically illustrated by an example. In the example, the stain-removability and antibacterial property of the fabric by washing are measured.

Evaluation was performed using the first method.

(1) Stain removal by washing A1 Test method using synthetic contaminant source 0.75 g of a synthetic contaminant source prepared by mixing the following oil-based stain agent and dry stain agent at a ratio of 3:1.)! J polyphosphate soda 5g,
5g of sodium laurylbenzenesulfonate with 2M distilled water
A contaminated solution was prepared by dispersing it in Il.

[Oil-based staining agent]

Stearic acid Oleic acid Hydrogenated oil Olive oil Heptyl alcohol Solid paraffin Cholesterol 12.5% by weight 12.5 12.5 12.5 8.5 21.5 ” 5.0 Total [Drying stain agent] Clay Portland cement 100.0% by weight 55.0% by weight 17.0 Ferric oxide 0.5 T-decane 8,75” Carbon black 1.75 Total ioo, o% by weight Next, JIS
- In the rounder meter tester used for the washing fastness test method of L-0844, 200 m of the above recontamination solution was added to the test bottle.
l and Steelbow 91 used in the above washing fastness test method.
Insert 4 test pieces of white cloth cut into 5cm x 5cmI pieces and seal.

Treatment was performed at 40±2°C for 1 hour. After this, the test piece was taken out, rinsed with running water, and then rinsed with 40°C water.
After washing with a rounder meter at 00- for 10 minutes,
Take out the test piece, rinse it with running water, and soak it again in 25°C water for 10 minutes.
The sample was washed for 10 minutes using a rounder meter at 0-0, rinsed with running water twice, dehydrated, and dried in a tumbler.

After drying, the grade was determined using a gray scale for contamination. Judgment is made on a five-level scale, with grade 5 indicating no contamination and good condition, and grade 1 indicating significant contamination (darkening).

B. Test method based on sediment pollution source Cut the sample into 20c+n
3 g of IS-Z-8901 (Kanto loam layer fine grain) sand was sealed in a plastic bag.

After processing for 1 hour in the pilling tester test box,
Remove from the plastic bag and use Matsushita Electric's fully automatic washing machine model NA-5580 to wash the new Zabu (Kao product).
, 5g/1 for 10 minutes at 40°C.

Furthermore, after rinsing for 5 minutes at room temperature.

Dehydrated and dried.

After drying, a five-grade classification was performed using a gray scale for contamination. Grade 5 indicates that the soil has been completely removed, and Grade 1 indicates that the soil has not been removed at all.

(2) Antibacterial property (bacteria count measurement method) Test bacteria (staphylococcus, 5ta-phy
lococcus aureus I F 01327
7) Add the bouillon suspension and heat it at 37°C in a closed container.
The number of viable bacteria was measured after culturing for 18 hours, and the difference in increase/decrease value with respect to the untreated sample cloth was determined from the following formula (1).

A: Number of bacteria immediately after inoculating the unprocessed sample B: Number of bacteria after culturing the unprocessed sample for 18 hours C: Number of bacteria after culturing the processed sample for 18 hours. It is necessary to confirm the active state, and if log (B/A) > 2, this test is considered valid, but if log (B/A) ≦ 2, this test is considered invalid, Perform a retest.

Example 1 Chips containing 0.1% of Eastbright 0B-1 (product of Eastman Kodak Co., Ltd., oxazole optical brightener) based on the weight of polyethylene terephthalate were mixed into 28
It was melted at 5°C and fed to a spinneret, and wound at 1500 m/min while spinning at a temperature of 280°C. Next, it was drawn at a temperature of 90° C. and a magnification of 3.2 times, and heat set at 150° C. to obtain a drawn yarn of 150 d/30 f. There were no problems such as yarn breakage, and the yarn spinning performance was good.

This was done using a Mitsubishi Heavy Industries ■ LS-6 plate twisting machine.

False twisting was performed under the conditions of twist number 2470T/M and heater temperatures of 190°C and 210°C. Using this false-twisted yarn, a smooth structure with a basis weight of 192 g/m' was made into a white original cloth.

Next, in a bath containing a nonionic surfactant, at 80°C,
Take a minute to relax, refine, and dehydrate.

After drying, apply 1.
After treatment at 30° C. for 30 minutes, it was dried in a conventional manner.

[Formulation 1] Next, the obtained white cloth was immersed in an aqueous solution of the following Formulation 2,
After squeezing the liquid with a mangle at a squeezing rate of 100%.

It was dried in a conventional manner and heat treated at a temperature of 150° C. for 1 hour and 1 minute to obtain a stain-resistant white fabric having antibacterial properties according to the method of the present invention.

[Formulation 2] For comparison with the present invention, a comparative white fabric (Comparative Example 1) was obtained using the same method as in this Example except that the step of using the aqueous solution of Formulation 2 in this Example was omitted. .

In addition, a comparative white fabric (Comparative Example 2) was obtained in the same manner as in this Example except that the aromatic polyester polyether block copolymer was omitted from the treatment bath of Formulation 1 used in this Example. .

Furthermore, a white fabric for comparison (Comparative Example 3) was obtained in the same manner as in this Example except that the trimethylolmelamine resin and organic amine salt catalyst were omitted from the aqueous solution of Formulation 2 used in this Example. .

In addition, in producing the white original fabric in this example, the fabric was produced without using a fluorescent whitening agent, and the resulting knitted fabric was relaxed and scoured in the usual manner, and then dyed with Ubitex EBF ( A white post-dyed fabric was obtained by performing white dyeing at 130° C. for 30 minutes with 1% O, W, F (product of Ciba Geigy, fluorescent whitening agent for post-dyeing).

This white post-dyed fabric was put into the treatment bath of formulation 1 of this example and treated under the same conditions as this example.

It was dried in a conventional manner, then immersed in an aqueous solution of Formulation 2 of this example, and treated in exactly the same manner as in this example to obtain a comparative white fabric (comparative example 4).

Measuring the performance of the white fabrics of the present invention and Comparative Examples 1 to 4,
The results are shown in Table 1 on the first page.

Table 1 As is clear from Table 1, the white fabric obtained by the method of the present invention not only had antibacterial properties, but also had excellent stain removability upon washing.

(Effects of the Invention) The white fabric obtained by the method of the present invention has the effect of making it easier to remove oil stains, water stains, dust stains, etc. that adhere when worn, and has excellent antibacterial properties. have. The white fabric of the present invention having such performance is an optimal material for car seat covers, white coats, sportswear, etc.

Claims (1)

[Claims] (1) Aromatic polyester polyether block copolymer is added to a fabric mainly made of synthetic fibers, which is made by mixing 0.01 to 0.3% by weight of an optical brightener during fiber production, with zero amount of aromatic polyester polyether block copolymer based on the weight of the fabric. . A method for producing an antifouling white fabric having antibacterial properties, which comprises containing 8% or more of the antibacterial antibacterial agent and then applying a quaternary ammonium salt antibacterial agent and a melamine derivative compound.