KR970010711B1 - Method for the preparation of synthetic fibers with good antibacterial deodorant property - Google Patents

Abstract

Polyester chip 95wt% of which specific viscosity is 0.65, silver 3.8wt%, inorganic ceramic 5wt% with the average grain size of 0.4 micrometer in which zirconium 35wt% is included, are mixed in the mixer, and is melting-kneaded in a twin-screwed melting kneader to produce a master batch chip. Thus the produced master batch chip is vacuum dried in the heat of 160 degree C for 4 hours, removed of the surface moisture, mixed with the general polyester chip in the mixing rate of 1:9, spun at a speed of 3000[rpm and the partially drawn thread is produced.

Description

Manufacturing method of synthetic fiber with excellent antibacterial and deodorization

The present invention relates to a method for producing synthetic fibers having excellent antibacterial and deodorizing properties. More specifically, non-porous inorganic ceramics and synthetic resins containing 2 to 50% by weight of a silver compound and a zirconium compound are melt-kneaded in a kneader and placed in a master batch ( After preparing a master batch), the final synthetic fiber relates to a method for producing a synthetic fiber having excellent antibacterial and deodorizing characteristics, characterized by mixing and spinning the master batch and the resin for the fiber so as to contain 0.2 to 5.0% by weight of inorganic ceramics .

In general, resins that can be used for textiles include polyester, polyamide, polyacrylic, and polyolefin. These resins are suitable for clothing, bedding, interior, industrial materials, etc. due to their excellent properties such as strength, processability, and ease of handling. It is widely used and recently, the use of such a resin has been strongly required to impart antibacterial deodorization performance as a kind of comfortable health function.

In our daily environment, there are many kinds of bacteria and fungi that are non-pathogenic and do not directly harm the human body, but cause deterioration, staining, odor of the fabric or non-woven fabric, or harm the human body by pathogenicity. Attach formatting. As our environment is easily contaminated by various microorganisms such as bacteria and fungi, antimicrobial deodorization processing has been of interest in the past for the purpose of preventing embrittlement of fiber materials and leading a healthy and comfortable life. Recently, as the living standard of consumers improves and a more comfortable life is pursued, the social environment changes that emphasize the importance of public health.

As a method for imparting antibacterial and deodorant functionality to conventional synthetic fibers, a post-treatment method is mainly performed, but it has problems such as durability degradation and human stability due to friction or washing. Examples of the antimicrobial agents used were organic antimicrobials such as quaternary ammonium salts (Japanese Patent Laid-Open No. 62-42715) or deacetylated chitin (Japanese Patent Laid-Open No. 4-272273). It is easy to produce, and has disadvantages in terms of heat resistance, human stability and antimicrobial properties, and the quaternary ammonium salt system, which is a representative organic antimicrobial agent, has poor washing durability and yellowing (yellowing) in particular when using a chlorine detergent. In addition, in the case of using an antimicrobial agent which ion-exchanged bactericidal metal ions in a porous inorganic material zeolite (crystalline aluminosilicate) as an inorganic antimicrobial agent (Japanese Patent Laid-Open No. 3-205436), due to the adsorption characteristics of the zeolite itself, The zeolite used as an absorbing antimicrobial agent is mainly A type, which has a larger molar ratio of alumina / silica than other zeolites, so that it can replace a large amount of metal, so it is mainly used as a binder of antibacterial metal ions. It may adversely affect trimming due to the decomposition of the polymer by water and a decrease in strength of the final fiber.

In addition, due to the fact that the antimicrobial agent such as zirconium-based non-zeolite-based inorganic material has almost excellent antimicrobial activity and physical property deterioration, it has a significant meaning in terms of technology establishment, but since the price of the antimicrobial agent itself is very expensive, it is not practically applicable to textile manufacturing. In terms of being porous and poor in comparison with zeolite-based antimicrobial agents, when applied to bedding applications such as duvet covers or quilting, the performance of removing odors is deteriorated.

Accordingly, it is an object of the present invention to provide a method for producing synthetic fibers having excellent antibacterial and deodorizing properties that are excellent in durability and human stability by friction and washing in process operations.

In order to achieve the above object as well as another easily expressed object, in the present invention, a non-porous inorganic particulate ceramic is added to the inside and the surface of the fiber to prepare a synthetic fiber having excellent process permeability and durability by friction or washing. In other words, the inventors of the present invention use the fact that some metal ions destroy the metabolism of microorganisms and exhibit some antimicrobial properties and some metal oxides can chemically bond with molecules of malodorous components to produce deodorizing effects. By adding an inorganic ceramic having a fiber to the fiber was able to produce a synthetic fiber having antibacterial deodorization.

The present invention will be described in more detail as follows.

In the present invention, after preparing a master batch by adding and kneading a nonporous inorganic ceramic containing a silver compound and a zirconium compound to the synthetic resin, the final synthetic fibers contain 0.2 to 5.0% by weight of inorganic ceramics The resin for fibers was mixed and spun to obtain synthetic fibers having excellent antibacterial and deodorizing properties.

The non-porous inorganic particulate ceramics used in the present invention contain antimicrobial and deodorizing metal ions in the form of oxides, and are finely and uniformly adjusted at an average of 0.4 μm to enable uniform dispersion and easy processing. As it can maximize the antibacterial deodorization, and also has a non-porous nature, there is little moisture adsorption, so there is no need of pre-treatment of high temperature drying before use.

0.2-5.0 weight% is suitable for the addition amount of the inorganic fine particle ceramic containing metal ion with respect to all resin, Preferably, 0.5-2.0 weight% is preferable. If it is less than 0.2% by weight, the antimicrobial deodorization effect is insufficient in the final fiber, and if it exceeds 5% by weight, the process passability is not only difficult but also economically advantageous.

The antimicrobial deodorization performance of the inorganic ceramics used depends largely on the amount of metal ions present on the inorganic ceramic surface. In the present invention, in order to effectively exhibit the antibacterial and deodorizing performance, the metal contained in the inorganic ceramic is silver and zirconium, and the content is preferably 2 to 50% by weight, and more preferably 5 to 40% by weight. If it is less than 2% by weight, the antimicrobial deodorization effect on the final fiber is insufficient, and if it exceeds 50% by weight, the increase of the antibacterial deodorization effect is minimal.

In the present invention, as the resin used, polyester, polyamide, polyacryl, polyolefin, etc., which can be generally used for fibers, can be used, and the master batch is melt kneaded with an inorganic ceramic containing synthetic metal ions and a synthetic resin with a kneader. To prepare. The surface moisture of the thus prepared master batch chip was removed, mixed with the fiber resin chip at a ratio of 1: 1 to 1:50, and melt-spun to obtain antibacterial and deodorizing synthetic fibers. However, considering the dispersibility and economical efficiency of the particles, the mixing ratio of the optimum antimicrobial deodorizing master batch chip and the resin chip for fibers is preferably 1: 9.

The antimicrobial action of the inorganic fine particle ceramics of the present invention is to inhibit enzymes of basic metabolic systems such as respiratory system and electron transfer system of microbial cells by active oxygen ionizing oxygen in the air in contact with the catalytic action of antimicrobial metal ions contained in the ceramic or It impairs the movement of substances in cell membranes, and it is explained that when odor components caused by bacteria or fungi are generated, they are decomposed by antibacterial metal ions contained in the inorganic particulate ceramics.

Evaluation of the antimicrobial activity of the fiber prepared as described above was carried out by shake flask method (Staphylococcus Aureus, ATCC 6538) was used as a test bacteria, put the sample in a Erlenmeyer flask containing a certain amount of test bacteria solution 25 After shaking at room temperature for 1 hour to sufficiently contact the sample and the bacteria, the living bacteria in the flask were cultured and the number of bacteria was measured to calculate the bacteria reduction rate as follows.

Here, A: Number of bacteria per 1ml of test bacteria after stirring

B: Number of bacteria per 1 ml of test bacteria before stirring

The deodorizing effect was ammonia gas and hydrogen sulfide gas as the test substance. In the case of ammonia gas, the test specimen was placed in a 6.3L desiccator with an initial concentration of 100 ppm, and the concentration was measured after 8 hours. When the hydrogen sulfide gas was used, it was evaluated in the same manner as ammonia gas in the 6.3 L desiccator with an initial concentration of 700 ppm, and the durability of the laundry was evaluated by the JIS L 0217-103 method. In other words, dissolve the synthetic detergent at the rate of 2g per 1L in water at 40 ℃, wash the liquid for 5 minutes with 1/30 liquid ratio, and then dewash and dehydrate with fresh water for 2 minutes and rewash and dehydrate again for 2 minutes. Dried. The above operation was carried out 50 times to obtain a washing sample 50 times.

In the following Examples and Comparative Examples, the present invention will be described in more detail, but the scope of the present invention is not limited.

(Example 1)

95 weight percent polyester chip with intrinsic viscosity of 0.65, 3.8 weight percent silver, and 35 weight percent zirconium containing 5 weight percent of inorganic ceramic with an average particle diameter of 0.4 µm were mixed and mixed with a twin screw kneader. Melt kneading to prepare a master batch chip. The master batch chip thus prepared was dried under reduced pressure at 160 ° C. for 4 hours to remove moisture from the surface of the chip, mixed with a general polyester chip in a mixing ratio of 1: 9, melted and spun at a speed of 3000 rpm to prepare partially drawn yarn. The partially drawn yarn was stretched 1.80 times under a heater roller temperature of 90 ° C. and heat-treated at 125 ° C. to prepare 75 d / 36f polyester fiber containing 0.5 wt% of inorganic ceramic in the final fiber. After performing the above performance test using this fiber, the results are shown in Table 1.

(Example 2)

Except 97% by weight of polyester and 3% by weight of inorganic ceramics, polyester fibers were manufactured in the same manner as in Example 1, and performance tests were performed. The results are shown in Table 1 below.

(Comparative Example 1)

A polyester fiber was prepared in the same manner as in Example 1 except that 99 wt% of polyester and 1 wt% of inorganic ceramic were prepared, and the results were shown in Table 1 below.

(Comparative Example 2)

A polyester fiber was prepared in the same manner as in Example 1 except that 0.3 wt% of silver and 1.1 wt% of zirconium-containing inorganic ceramics were used, and the results were shown in Table 1 below.

TABLE 1

Where CAo: initial concentration of ammonia gas

CA: Ammonia gas concentration after 8 hours

CSo: Initial concentration of hydrogen sulfide gas

CS: hydrogen sulfide gas concentration after 8 hours

Claims (3)

A method for producing a synthetic fiber comprising mixing and spinning a master batch chip prepared by adding a nonporous inorganic ceramic containing a silver compound and a zirconium compound to a synthetic fiber resin and a resin for a synthetic fiber. The method for producing a synthetic fiber according to claim 1, wherein the non-porous inorganic ceramic is contained in the final synthetic fiber at 0.2 to 5.0% by weight. The method for producing synthetic fibers according to claim 1, wherein the non-porous inorganic ceramic contains 2 to 50% by weight of silver and zirconium.