JPH03241071A - Antifouling fabric having antimicrobial property and production thereof - Google Patents

Abstract

PURPOSE:To obtain an antimicrobial and antifouling fabric excellent in especially redeposition preventive properties in washing by treating a fabric composed of polyester fiber with an antimicrobial agent composed of an organosilicon quaternary ammonium salt and chitosan in combination. CONSTITUTION:An antimicrobial and antifouling fabric, obtained by treating especially polyester-based fiber fabric with a treating bath containing an antimicrobial agent composed of an organosilicon quaternary ammonium salt together with chitosan, fixing both the aforementioned agents to the fiber surface and forming films good in fouling releasing properties in washing and excellent in redeposition preventive properties. Furthermore, octadecyldimethyl(3- trimethoxysilylpropyl)ammonium chloride, etc., can be exemplified as the antimicrobial agent.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an antibacterial stain-resistant fabric that is excellent in preventing re-staining during washing.

(Conventional technology) Polyester fibers are more hydrophobic than natural fibers,
It is the least hydrophilic among all types of fibers.

This problem causes discomfort in the clothing field, the generation of static electricity that causes unpleasant discharge noises when putting on and taking it off, and clings to the body.Furthermore, it is difficult to prevent recontamination during washing, causing problems such as darkening of soiled areas. This turned out to be a major drawback. In addition, products that have been subjected to antibacterial treatment have a further problem of poor recontamination prevention properties during washing.

For the former, which causes unpleasant discharge noises when attaching and detaching due to the generation of static electricity, and clings to the body, countermeasures such as methods of interweaving or interweaving antistatic threads or conductive threads on the fabric, and methods of using antistatic agents in the finishing agent are available. has been taken and the bottom beam has been raised.

On the other hand, regarding the latter method of improving re-staining prevention properties during washing, a polycondensate of polyethylene glycol and terephthalic acid is applied by a post-treatment method or an exhaustion method, making it easy to remove stains even if they become dirty. methods of making fibers hydrophilic, such as methods of making fibers hydrophilic, and methods of creating fiber surfaces that do not get wet with oil or water by lowering the critical surface tension of the fiber surfaces using organic fluorine compounds, etc.

Although many methods have been proposed, these methods.

All of them had the drawback of significantly changing the original characteristics of the fibers. In particular, to date, there has been no effective method for improving the prevention of recontamination due to washing of fabrics that have been given antibacterial properties through post-processing.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned current situation.9 It is easy to remove dirt from wearing or adhering to the product during washing, and there is a risk of recontamination from dirt during washing. The object of the present invention is to obtain an antibacterial antifouling fabric with excellent antifouling properties.

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

In other words, the fourth invention of the present application is ``a fabric mainly composed of polyester fibers, characterized by containing an antibacterial agent consisting of an organic silicon quaternary ammonium salt and chitosan, which has anti-recontamination properties during washing. The second invention of the present application is to treat a fabric mainly made of polyester fibers with an antibacterial agent made of an organic silicon quaternary ammonium salt and chitosan. A method for producing an antibacterial antifouling fabric with excellent recontamination prevention properties during washing, which is characterized by:

The present invention will be explained in detail below.

In the present invention, a fabric mainly made of polyester fibers is used as the fabric to be processed.

The polyester fibers referred to in the present invention include polyethylene terephthalate, polybutylene terephthalate, poly-1,
It refers to fibers made of 4-cyclohexylene dimethylene terephthalate, polyethylene-2,6-naphthalate, etc., and in particular white spun-dyed polyester fibers that are spun with a fluorescent brightener mixed in during the production of these polyester fibers. Maximum effectiveness can be achieved by adapting inventions. White originals are easily soiled, and are particularly useful for sheets, lab coats, socks, car seat covers, sportswear, etc., but these require antibacterial properties, are washed frequently, and are easily recontaminated. Among the polyester fibers used in the present invention, white original polyester fibers in particular show more favorable results. The reason for this is not clear, but white original polyester fiber spun with a fluorescent brightener mixed therein9 has a higher suction force between the fiber surface and dirt particles (fan The maximum value of the total potential energy function between the fiber surfaces, expressed as a composite function of Del Waals force) and repulsive force (electrostatic interaction).

In other words, it is believed that this is due to the fact that the total interaction potential energy barrier value is large, and the energy barrier layer that repels dirt particles on the fiber surface provides excellent recontamination prevention properties during washing.

Fluorescent brighteners used when spinning polyester fibers with optical brighteners include pyrene-based, oxazole-based, coumarin-based, and thiazole-based.

Imidazole series, imidasilone series, pyrazole series.

Benzidine type, diaminocarbazole type, naphthalic acid type, diaminostilbenzyl sulfonic acid type, etc. can be mentioned. 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%.

In the present invention, the term "fabric" refers to a fabric mainly made of the above-mentioned polyester fibers, but these polyester fibers may be supplemented with other fibers, such as natural fibers such as cotton, hemp, and woo, and semi-synthetic fibers such as rayon and acetate. It may be used by blending, weaving, or knitting. What is the fabric mentioned here?
1 knitted fabric.

Means nonwoven fabric, etc.

In the present invention, the above-mentioned fabric is impregnated with chitosan and an antibacterial agent made of an organic silicon quaternary ammonium salt. When impregnated with fiber fabric in this way,
It is thought that the antibacterial agent and chitosan adhere to the surface of the fibers, forming a film with excellent stain removal properties during washing.

Examples of the antibacterial agent made of an organosilicon quaternary ammonium salt used in the present invention include octadecyldimethyl(3-trimethoxysilylpropyl)ammonium chloride and dodecyldimethyl(3-trimethoxysilylpropyl)ammonium chloride.

It is desirable that the amount of adhesive on the fabric be kept to a minimum within the range that provides antibacterial performance. If more than necessary is used, problems such as a decrease in color fastness and discoloration may occur, and good results may not be obtained, so care must be taken.

The chitosan used in combination with the above antibacterial agent has free amino groups obtained by treating chitin obtained from vertebrate crustaceans, mushrooms, etc. with a highly concentrated alkali and deacetylating it. The deacetylation degree of chitosan is 30~
It is 100%, preferably 50% or more.

In the present invention, deacetylated chitosan is dissolved in an organic acid such as acetic acid, lactic acid, or formic acid or an inorganic acid such as hydrochloric acid at a ratio of 1 part acid to 1 part chitosan or more.

A water-soluble quaternary ammonium salt of chitosan formed by reacting an amine group of chitosan with an acid can be particularly preferably used.

When chitosan is dissolved in an aqueous solution of an organic acid or an inorganic acid, the concentration of chitosan is preferably 20% or less, and if the concentration of chitosan exceeds 20%, the solubility in the aqueous acid solution deteriorates. In addition, the obtained aqueous solution of chitosan salt has p
It is even more preferable to set it within the range of H3 to H6.

The amount of adhesion to the fabric should be 0.01 to 1% based on the weight of the fibers, and if it is used in an amount greater than 1%.

It is not preferable because it causes yellowing of the fibers and hardening of the texture, and it is not preferable if the amount is less than 0.01%.

A good recontamination prevention effect cannot be obtained.

The antibacterial agent and chitosan salt aqueous solution may be mixed and applied to the fiber fabric by a conventionally known impregnation bud dry cure method, and is not particularly limited.

The present invention has nine or more configurations, and according to the present invention, it is possible to obtain an antibacterial and antifouling fabric that is excellent in preventing recontamination during washing.

(Function) When an antibacterial agent made of organosilicon quaternary ammonium salt is treated with an aqueous chitosan salt solution and adhered to polyester fibers, it not only imparts antibacterial properties, but also provides antibacterial properties.
The surface of the fiber is made hydrophilic by the chitosan salt, giving it excellent stain releasability during washing. The effects of both the hydrophilized fiber and the drug further activate the ability to remove stains from washing, and synergistically improve the ability to prevent re-staining during washing.

In particular, if white color spun-dyed polyester fibers are used in the fabric of the present invention, good white skin can be maintained for a long period of time, and furthermore, it has an antibacterial effect due to the action of an antibacterial agent made of an organic silicon quaternary ammonium salt. Since a stain-resistant fabric can be obtained, it can be used for a variety of purposes.

(Example) Next, the present invention will be described in more detail with reference to Examples. In the Examples, the anti-recontamination property and antibacterial property of the fabric during washing were evaluated using the following method.

(1) Prevention of re-staining during washing 0.75g of a synthetic staining source made by mixing the following oil staining agent and dry staining agent in a ratio of 3=1)! J polyphosphate soda 5g,
5g of sodium laurylbenzenesulfonate in 1 part distilled water
1 was dispersed and prepared to prepare a contaminated solution.

[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 100.0% by weight [ Dry staining agent] Clay 55.0% by weight Portland cement 17.0 Ferric oxide
0.5 γ-decane 8.75 Carbon black 1.75 Total
100.0% by weight Next, using a rounder meter tester used in the washing fastness test method of JIS-L-0844, 200 mf of the above recontamination liquid and 10 steel balls used in the above washing fastness test method were placed in a test bottle. Put, 5c
Four test pieces of white cloth cut to m x 5 cm were placed in the container, sealed, and treated at 40±2° C. for 1 hour.

After this, the test cloth was taken out, rinsed with running water, and further washed with 100 ml of 40°C water using a rounder meter.
After washing for 1 minute, the test piece was taken out, rinsed with running water, and again soaked in water at 25°C for 10 minutes using a rounder meter.
Wash for a minute, rinse with running water twice, then dehydrate.
It was 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 indicating no staining and good re-staining prevention properties, and 1st grade indicating significant staining (darkening) and poor red-contamination prevention properties.

(2) Antibacterial property Test method by measuring the number of bacteria Test bacteria (staphylococcus, 5ta-phylococcus)
A bouillon suspension of S. aureus I F○13277) was lubricated, and the number of viable bacteria was measured after adhesion for 18 hours at 37°C in a sealed container, and the difference in increase/decrease value with respect to the untreated sample cloth was calculated using the following formula (1). If the difference in increase/decrease value was 1.6 or more, it was determined that there was an antibacterial effect.

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 Example 1 Yeast Bright ○B-1 (manufactured by Eastman Kodak Co., Ltd., oxazole optical brightener) mixed with 0.1% of the weight of polyethylene terephthalate.
It was melted at ℃ and fed to a spinneret, and wound at 1500 m/min while spinning at a temperature of 280 ℃. Next, 90
It was drawn at a magnification of 3.2 times at 1° C. and heat set at 150° C. to obtain a drawn white spun-dyed polyester yarn of 150 d/48 f. There were no problems during spinning, and the spinning properties were good.

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

False twisting was performed under the conditions of twist number 2470 T/M and heater temperatures of 190°C and 210°C. Using this false twisted yarn, a smooth knitted fabric with a basis weight of 195 g/m'' was knitted.

The obtained white spun-dyed polyester knitted fabric was used as a fabric to be processed, and was treated with a bath containing 0.5 g/l of a nonionic surfactant.
Relaxation at 0℃ for 20 minutes, scouring treatment, dehydration,
After opening, drying was performed at 120° C. for 2 minutes in a short loop dryer.

Subsequently, padding with a combined treatment solution of an antibacterial agent and chitosan salt aqueous solution shown in Formulation 1 below (squeezing ratio 98%) was performed, dried for 2 minutes at 120°C in a short loop dryer, and dried at 170°C in a tenter for 1 hour. The antibacterial antifouling fabric of the present invention was obtained by heat treatment for 1 minute.

[Formulation 1] Formulation 1 used in this example for comparison with the present invention
A comparative antibacterial antifouling fabric (Comparative Example 1) was obtained in the same manner as in Example 9, except that the aqueous chitosan salt solution was omitted from the treatment bath.

The performance of the antibacterial antifouling fabrics of the present invention and Comparative Example 1 was measured, and the results are shown in Table 4.

As is clear from Table 1 and Table 4, the antibacterial effect of the fabric of the present invention is on the same level as that of the comparative example, but the fabric of the present invention is extremely superior in terms of anti-recontamination properties at grades 4 to 5. I understand.

Example 2 The same knitted fabric as in Example 1 was fabricated by using polyester fiber produced without using a fluorescent whitening agent during the production of the white original polyester fiber in Example 1, and the nonionic fabric was fabricated using this silk fabric. Relaxation and scouring treatment was performed at 80°C for 20 minutes in a bath containing 0.5 g/l of surfactant, and then Uvitex EBF (manufactured by Ciba Geigy, an optical brightener for piece dyeing) was applied using a high-pressure jet dyeing machine. 〉 1%o1w, f
White dyeing was carried out at 130°C for 15 minutes, and after dehydration and opening, drying was carried out at 120°C for 2 minutes in a short loop dryer.

This white piece-dyed knitted fabric made of ordinary polyester fibers was placed in the treatment bath of Formulation 1 in Example 1 above.

The treatment was carried out under the same conditions and steps as in Example 1 to obtain an antibacterial and antifouling fabric of the present invention.

9Formulation 1 used in this example for comparison with the present invention
An antibacterial antifouling fabric for comparison (Comparative Example 2) was obtained in exactly the same manner as in Example 9, except that the aqueous chitosan salt solution was omitted from the treatment bath.

The performance of the antibacterial antifouling fabrics of the present invention and Comparative Example 2 was measured, and the results are shown in Table 2.

Table 2 As is clear from Table 2, the antibacterial effect of the fabric of the present invention is on the same level as that of the comparative example, but the fabric of the present invention is extremely superior in terms of re-contamination prevention property at grade 3. .

(Effects of the Invention) According to the present invention, it is possible to obtain an antibacterial and antifouling polyester fiber fabric that is excellent in preventing recontamination during washing.

Claims (2)

[Claims] (1) An antibacterial antifouling fabric that is mainly made of polyester fibers and is characterized by containing an antibacterial agent made of an organic silicon quaternary ammonium salt and chitosan, which has excellent recontamination prevention properties during washing. fabric. (2) An antibacterial antifouling product that is characterized by treating a fabric mainly made of polyester fibers with a combination of an antibacterial agent made of an organic silicon quaternary ammonium salt and chitosan, which has excellent recontamination prevention properties during washing. Fabric manufacturing method.