JPH02169740A - Bacteriostatic deodorizing cloth - Google Patents

Abstract

PURPOSE:To obtain the subject cloth having excellent durability of antibacterial property and suitable for clothes, beddings, etc., by weaving a thermoplastic synthetic fiber containing a specific metal (compound) and a cellulosic fiber incorporated with an antibacterial agent. CONSTITUTION:The objective cloth can be produced by weaving or knitting (A) a thermoplastic fiber produced by compounding (i) thermoplastic polymer such as polyethylene terephthalate with (ii) preferably 0.1-10wt.% of a liquid polyester preferably having a melting point of <=10 deg.C and a viscosity of >=10 poise at 25 deg.C and obtained by the polycondensation of e.g. adipic acid and a glycol and (iii) preferably 0.1-10wt.% of metallic silver, copper or zinc or their compound and (B) a cellulosic fiber such as cotton and linen bonded with an antibacterial agent (e.g. chlorhexidine).

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to an antibacterial and deodorizing fabric, which can be used for clothing, indoor wear, and bedding, and has antibacterial properties that have particularly excellent washing durability. Regarding knitting.

(Prior art) Polyester and polyamide fibers are used not only for clothing but also for interior decoration such as bedding products, carpets, and sofas.
Widely used in daily life products such as living room products.

On the other hand, there are various bacteria in our living environment.

Mold lives there, and when it finds a suitable location, it breeds. The surface of the human body is no exception; bacteria live in areas with high humidity. Many of the diseases currently called skin disorders are thought to be caused by the abnormal proliferation of bacteria on the skin surface. In addition, these bacteria breed on sweat-moistened clothing, causing deterioration and deterioration of fibers, and emitting a foul odor that causes discomfort. Especially when wearing synthetic fibers, as they lack the ability to absorb sweat.

Microorganisms multiply on sweaty skin, clothing, etc., causing decomposition and producing a sweaty odor. Therefore.

There has been a desire to develop synthetic fiber products that are clean, do not emit bad odors, are comfortable, and are safe by suppressing the growth of microorganisms on the fibers.

As a post-processing method for imparting antibacterial properties to fibers, silicone quaternary ammonium salts and the like have conventionally been used as particularly safe antibacterial and antifungal agents. For example, Japanese Patent Laid-Open No. 57-51874 discloses an organosilicone quaternary ammonium at-absorbed carpet and a method for producing the same. However, silicone-based
Grade ammonium salts have a strong bonding force with cellulose fibers and exhibit antibacterial properties that are durable against washing, but they do not form strong bonds with synthetic fibers and only exhibit temporary antibacterial properties. Therefore, in order to impart antibacterial properties to textile products, it is done by adding the above-mentioned chemicals and the like to a composition containing a considerable amount of cellulose fibers. In this case, the presence of thermoplastic synthetic fibers is essential in many cases in order to impart properties such as durability and shape stability to the textile product. The performance obtained by adding synthetic fibers becomes stronger as the proportion of synthetic fibers increases, but on the other hand, as the proportion of synthetic fibers increases, the amount of cellulose fibers decreases. The antibacterial performance obtained by the addition will be reduced.

A drawback of the prior art is that it is difficult to obtain a fabric with excellent antibacterial properties made of thermoplastic synthetic fibers and cellulose fibers that can be fully satisfied.

(Problems to be Solved by the Invention) The object of the present invention is to use a thermoplastic composite #! To provide a fabric with excellent durability in terms of antibacterial properties by imparting durable antibacterial properties to both fibers and cellulose fibers.

(Means for Solving Problem yA) The present invention provides a thermoplastic composite #! fiber containing powder of at least l''m metal selected from the group consisting of silver, copper and zinc, and cellulose molecules. Preferably, in this antibacterial and deodorizing fabric, the thermoplastic synthetic fibers are selected from the group consisting of silver, copper and zinc. powder of at least one metal or its compound, and a liquid polyester compound having a melting point lower than 10°C and a viscosity of 10 voids or more at 25°C...
... is a fiber made of a thermoplastic polymer dispersed inside, and particularly preferably, the thermoplastic synthetic fiber is a fiber made of a powder of copper metal or a compound thereof, silver, zinc,
Powder of at least one metal or its compound selected from the group consisting of aluminum and iron and a melting point lower than 10°C25
This is the case when the fiber is made of a thermoplastic polymer in which a mixture with a liquid polyester compound having a viscosity of 10 voids or more at 0°C is dispersed inside.In this way, the synthetic fiber side is made antibacterial, and the cellulose-based By applying a durable antibacterial agent to the fibers, a fabric with excellent durability, especially washing resistance, can be obtained.

The mechanism by which the antibacterial properties of the antibacterial thermoplastic fibers of the present invention are developed is that a small amount of metal ions are released from the fibers, and these act as poisons against bacteria and fungi.

First, the thermoplastic fibers constituting the present invention will be explained.

The thermoplastic polymers constituting the fibers include polyethylene terephthalate t*, a polyester polymer whose main repeating unit is an ethylene terephthalate unit, polybutylene terephthalate or a polyester polymer whose main repeating unit is a butylene terephthalate unit, nylon-6, nylon-610, nylon. -66 or the like, which has spinnability and preferably has a melting point of 200°C or higher.

Copper is the most preferred at least one metal selected from the group consisting of silver, copper and zinc that is added to impart antibacterial properties to these polymers. In addition, as a metal compound, ii, decomposition temperature% melting temperature, boiling temperature are all 1
Compounds that are solid at 00° C. or higher and 25° C. and 1 atm pressure are preferred, and specific examples include oxygen oxides, chlorides, and thiocyanides of the above metals. Whether it is metal powder or metal compound powder, the average particle size is 5μ
m or less is preferable.

As mentioned above, if a metal or a metal compound is simply kneaded into a polymer, metal ions are difficult to come out on the fiber surface and sufficient antibacterial properties cannot be obtained. In order to help metal ions come out to the fiber surface, the melting point must be 10
It is preferable to use together a liquid polyester compound having a viscosity of 10 poise or more at 25° C. or lower. As such a compound, for example, AD manufactured by Adeka Argus Co., Ltd.
Polyester plasticizers commercially available as KCIZER series and POLYCIZE manufactured by Dainippon Ink Chemical Co., Ltd.
Examples include polyester plasticizers commercially available as R series. Specifically, examples of the acid component include compounds obtained by polycondensing dicarboxylic acids such as adipic acid, sepasic acid, and phthalic acid with glycol.

The weight proportion of the metal or its compound in the thermoplastic fiber is preferably 0.1 to 10% by weight, and the proportion of the liquid polyester compound is preferably the same <0.1 to 10% by weight. More preferably, copper or a copper compound is selected as the metal or metal compound, and the liquid polyester compound is used in combination with the metal, and at least one metal or copper compound selected from silver, zinc, aluminum, and iron is used. be. By doing so, the antibacterial properties are further enhanced. In this case, copper or copper compound and silver,
The ratio of at least 1 m of metal selected from zinc, aluminum, and iron or its compound is 1 = 99 to 1 weight ratio.
99:1 is preferred. It is preferable that the total amount of the above-mentioned metal compound does not exceed 10% by weight in the thermoplastic fiber.

In addition, the cellulose fibers constituting the present invention include cotton,
Examples include hemp and rayon. Antibacterial agents applied to the surface include silicon quaternary ammonium salt,
Examples include alkylamine derivatives, chlorhexidine, and polyoxyalkylene quaternary ammonium salts. These antibacterial agents are covalently bonded to the cellulose backbone.

Therefore, the antibacterial durability is excellent. The ratio of these antibacterial agents to cellulose fiber is 0.2
About 10% by weight is preferable from the viewpoint of performance and economy.

In the present invention, a fabric is made from such thermoplastic fibers and cellulose fibers, but the fibers may be filament yarns or spun yarns. Further, the fabric may be either woven or knitted fabric or non-woven fabric. It may also be a multi-layered fabric consisting of thermoplastic fibers on one side and cellulose fibers on the other side. There is.

An effective method for imparting antibacterial properties to cellulose fibers is to apply existing antibacterial agents by exhaustion or padding after dyeing the woven or knitted fabric. may be given to

When these antibacterial agents are applied to a fabric made of thermoplastic fibers and cellulose fibers, the antibacterial agents adhere to both fibers and exhibit antibacterial properties, but the antibacterial agents that adhere to the thermoplastic fibers Removes immediately upon washing.

However, when the thermoplastic fibers are made of the aforementioned fibers having antibacterial properties, the antibacterial properties of the thermoplastic fibers are retained in the fabric even after washing. As a result, a highly durable antibacterial fabric can be obtained no matter how the ratio of thermoplastic fibers to cellulose fibers in the fabric changes.

In the present invention, it is not necessary that all of the thermoplastic fibers other than cellulose fibers have antibacterial properties, but the more the better. Furthermore, it is not necessary that all cellulose fibers be provided with an antibacterial agent.

<Effects of the Invention> According to the present invention, the antibacterial performance of the woven or knitted material is provided by both thermoplastic fibers having antibacterial properties and cellulose fibers to which an antibacterial agent has been added. It is possible to reduce both the ratio of antibacterial agent and the amount of antibacterial agent to be applied to cellulose fibers, which has a great cost advantage.

Endurance Moreover, it has extremely antibacterial properties and long-lasting properties.

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples. The evaluation of the bactericidal effect and washing conditions in the examples were carried out by the following test method.

Measurement of resterilization rate> Performed by shake flask method. The bacterial species used is Staphylococcus aureus.
Using FDA 209), add a predetermined amount of the test bacterial solution into an Erlenmeyer flask, add 1.5 y of measurement sample piece, perform 8-figure shaking at 13 Q rpm x 1 hr at 25°C, and count the number of viable bacteria in the flask. After that, the sterilization rate was calculated -A Sterilization rate (ch) = X100 A: Number of bacteria per ml of Erlenmeyer flask after shaking B:
Washing test method to determine the number of bacteria per lff16 in the Erlenmeyer flask before shaking> Conducted according to JIS L0217-103 method, liquid temperature 40
Add and dissolve laundry detergent in a ratio of 22 parts to IJ of water at ℃ to prepare a washing liquid. The sample and load cloth were added to this washing liquid at a bath ratio of 1:30, and the operation was started.After processing for 05 minutes, the operation was stopped, and the sample and load cloth were dehydrated using a dehydrator.
Next, replace the washing liquid with fresh water at room temperature, rinse for 2 minutes at the same bath ratio, and air dry. The above operation was repeated 10 times to obtain a measurement sample after 10ML.

Example 1 [η) = 0.65dll? (Intrinsic viscosity measured using an Uebelohde viscometer in a 30°C constant temperature bath using an equal volume mixed solvent of phenol and tetrachloroethane)
Polyethylene terephthalate to which Ti02Q and 5 wt% were added was extruded using a 40φ extruder, and zinc oxide powder (average particle size of 5 μm or less) was added as an antibacterial powder to the bath melt polymer line of the polymer, and the viscosity showed fluidity at 25 ° C. is about 1
00 Boyz polyester compound (polyester plasticizer manufactured by Adeker Argus Chemical Co., Ltd.: trade name PN-350)
were mixed at a weight ratio of 1:1, sufficiently crushed and dispersed in a vibrating mill, and then thoroughly dried at 120° C., the mixture was 2% by weight, that is, the zinc oxide powder was 1% by weight, based on the polymer flow. The polyester compound was injected to a concentration of 1% by weight, then kneaded using a 40-element stitch mixer manufactured by Kenics, and spun through a round hole nozzle. The spun yarn was drawn in a water bath at 90°C to obtain a drawn yarn with a single filament denier of 3 dr, which was crimped in a conventional manner, cut into a length of 51+U, and subjected to normal spinning. A yarn of Lao/1 (ta2 denier) was obtained by the method. Using this yarn, we made a knitted fabric and measured its antibacterial properties after washing and washing 10 times.The antibacterial properties were 98.8% before washing and 94.6% after washing.
Met.

Fabrics having the ratios shown in Table 1 were made using the antibacterial yarn 40/1 and ordinary polyester 150 denier and cotton yarn 30/1. (Sample 1 and Sample 2) Next, both the ester and cotton of these fabrics were dyed by a conventional method, and the dyed sample was called A. After dyeing, the antibacterial agent consisting of silicon quaternary ammonium salt was added to the padding to add 2% OWF. Yo f
i), 9 samples were dried at 130° C. for 5 minutes and designated as B, and a total of 4 samples were prepared. They are shown in Table 2.

Table 1 Ratio table of yarns constituting the fabric 2 Sample details Table 3 shows the antibacterial properties of these four samples before and after washing. Washing was carried out 10 times.

Table (6) In shake flask measurements, the value for the control gauze was 27.3%.

As is clear from the results in Table 3, antibacterial processing of 1M yarn alone (2-A) and antibacterial polyester fiber alone (1-B)
Although the antibacterial performance of the fabric is insufficient, the performance when both coexist is excellent (1-A).

Example 2 According to Example 1, woven temples as shown in Table 4 were produced.

FK-50OS (silicon-based quaternary ammo-'7Aff
As an antibacterial finishing agent, it was diluted with water to the level 5 of C-G as shown in Table 5, and the pink-up rate was 10.
Bubble ink was applied at 0%, and after drying, the ink was set with dry hot air at 120° C. for 30 seconds. With this, antibacterial treated cloth 10
The antibacterial properties of this antibacterial treated cloth before and after washing are shown in Table 6. Sample 3.4 was obtained by dyeing both ester and cotton using a conventional method. After dyeing, Tokai Oil Co.'s Dagrox (Note) Wash 1 was tested for antibacterial properties using the 1QHL 7-Ake flask method, and the value of the control gauze was 29.1%.

As is clear from the results in Table 6, when no antibacterial thread is present,
Good durability cannot be achieved unless the amount of antibacterial finishing agent is considerably increased (4-F', 4-G), but in the presence of an antibacterial system, using a low concentration of antibacterial finishing agent is sufficient. Get out.

Example 3 Same as in Example 1 except that the entire amount of zinc oxide powder used in the production of antibacterial thread was replaced with a mixed powder (average particle size of 5 μm or less) consisting of metallic steel and metallic silver 9:1 (weight ratio). An antibacterial yarn was obtained in the same manner as in Sample 1-A, and an antibacterial-treated fabric was obtained in the same manner as in Sample 1-A. The antibacterial properties of this fabric before and after washing were 98.1% and 93.4%, respectively, using the same shake flask method as in Example 1, which were better results than in Example 1. .

Patent applicant RiRashi Co., Ltd.

Claims (1)

[Claims] 1. A thermoplastic synthetic fiber containing powder of at least one metal selected from the group consisting of silver, copper, and zinc or a compound thereof, and an antibacterial agent chemically bonded to cellulose molecules. Antibacterial and deodorizing fabric made of cellulose fibers on the surface. 2. The thermoplastic synthetic fiber is a powder of at least one metal selected from the group consisting of silver, copper and zinc, or a liquid polyester compound having a melting point lower than 10°C and a viscosity of 10 poise or more at 25°C. The antibacterial and deodorizing fabric according to claim 1, which is a fiber made of a thermoplastic polymer in which is dispersed.