JPH07102475A - Production of antifungal and flame-retardant textile product - Google Patents

Abstract

PURPOSE:To obtain the textile product provided with antifungal nature of excellent washing resistance without impairing its flame retardancy, by imparting a flame-retardant textile product with specific ceramic powder. CONSTITUTION:Flame-retardant fibers containing phosphate-, nitrogen- or sulfur-based organic flame retardant (e.g. melt-spun fibers like polyester, polyamide fibers, wet-spun fibers like acrylonitrile fibers, dry-spun fibers like cellulose acetate fibers) are imparted with ceramic powder consisting (mainly) of zinc oxide and a thermosetting resin such as urea-formaldehyde- or melamine- formaldehyde-based one or a thermoplastic resin such as polyester- or polyamide- based one, and then the antifungal and flame-retardant textile product excellent in washing resistance and causing no yellowing without impairing its flame retardancy is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for imparting antibacterial properties to a flame-retardant fiber product without impairing the flame retardancy.

[0002]

2. Description of the Related Art The flame-retardant organic fibers currently on the market are
An organic flame retardant such as a phosphorus-based, nitrogen-based, or sulfur-based flame retardant is added to the fiber or on the surface of the fiber.
If a conventional organic compound-based antibacterial agent is used for antibacterial and antifungal treatments or resin treatments associated therewith, the flame retardancy of the fiber is lowered.

On the other hand, recently, there is an increasing demand for imparting a permanent antibacterial property to textile products. Of course, it is important for textiles to have antibacterial properties in daily life, but there is an increasing need in recent years for curtains, bed sheets, futons, etc. used in hospitals, nursing homes, nursing homes, etc. It is a textile product.

The textile products used in these medical facilities are
Due to the nature of the facility, it is required to be non-combustible or flame-retardant. In addition to this, MRSA (resistant bacteria),
That is, prevention of the spread of bacteria against which antibiotics are not effective is becoming an important social problem.

Conventionally, antibiotics have been widely used as antibacterial agents, but due to the prevalence of MRSA, it is not possible to rely on antibiotics alone, and measures such as cleaning with bactericides and hand washing are taken. However, there is an increasing demand for textile products such as curtains and bed sheets to have antibacterial properties.

Compounds such as mercury, tin, copper, and silver, that is, inorganic compounds have a bactericidal effect on MRSA. However, mercury compounds are extremely poisonous and their use is prohibited, and tin compounds are also highly toxic and difficult to use.

Since compounds such as copper and silver are suitable because they have relatively low toxicity, it is proposed to use them. However, when they are fixed to the fiber surface with a resin, these antibacterial agents are In many cases, it is embedded in a fixing resin, and depending on the resin, it may not react sufficiently with the antibacterial agent to exert its effect sufficiently. Also, coloring is one of the difficulties.

In order to compensate for this drawback, a method has been developed in which a silver compound or a copper compound is adsorbed on an adsorbent such as zeolite, and the adsorbent is fixed to a fiber product. In this case, even if the zeolite is embedded in the resin, silver ions and copper ions are relatively easy to move, so that the antibacterial property is exhibited, but yellow light is caused by light or by reacting with sulfides in the air. It has the drawback of causing discoloration and browning.

[0009]

SUMMARY OF THE INVENTION The present invention has an object of producing a fiber product having excellent antibacterial properties without impairing flame retardancy in spite of the above-mentioned problems. To do.

That is, according to the present invention, phosphorus-based, nitrogen-based,
It is characterized in that zinc oxide or a ceramic powder mainly composed of zinc oxide is applied to flame-retardant fibers containing an organic flame retardant such as sulfur.

Further, the textile product obtained by the method of the present invention has an excellent shielding property against radiant rays such as sun rays, ultraviolet rays, visible rays, infrared rays, and heat rays, and has a good texture and whiteness. It can also prevent sunburn and obtain cool textile products.

The fibers used in the present invention include melt-spun fibers such as polyester, polyamide, and polyolefin containing organic flame retardant, wet-spun fibers such as polyacrylonitrile-based and rayon-based, and dry-spun fibers such as acetate. To be

The zinc oxide used in the present invention may be ceramics alone or containing 50% by weight or more of zinc oxide and other than these, titanium oxide, zirconium oxide, aluminum oxide and the like are mixed. (Generally referred to as zinc oxide ceramics). Particle size is 3 μm
Hereafter, it is preferable to use finely pulverized or classified particles of preferably 1 μm or less because the suspension becomes stable.

The zinc oxide-based ceramics are fibers,
Textile products such as yarns, woven fabrics, and knits are applied as a suspension together with a resin serving as a binder by post-processing means such as padding, coating, printing and spraying.

The amount of zinc oxide ceramics applied to the fiber product is 0.1 to 40% by weight, preferably 0.5 to 30% by weight, based on the fiber product.

Examples of the resin used include thermosetting resins such as urea formalin type and melamine formalin type, thermoplastic resins such as polyester type, polyvinyl acetate type, polyacrylic acid ester type, polyamide type, or the like. However, it is preferable to use a thermoplastic resin as a main component as much as possible so as not to impair the flame retardancy. Particularly for polyester fiber products, it is preferable to use a thermoplastic polyester resin.

The resin layer formed on the fiber product is preferably flame-retardant itself, but when the resin layer is not flame-retardant, a flame retardant such as antimony trioxide or antimony pentoxide is used. Inorganic flame retardants, phosphorus organic flame retardants, etc. may be added to the zinc oxide ceramic suspension to impart flame retardancy to the resin layer.

The fixing treatment generally involves the steps of resin impregnation, squeezing, drying, and heat treatment as in the case of resin processing of ordinary textiles, but it is not limited to this method.
As described above, it may be applied by spraying or the like, and then dried and heat-treated.

Next, the present invention will be described in more detail with reference to Examples.

[0020]

【Example】

Example 1 A cloth for a curtain made of a tricot knitted fabric of a flame-retardant polyester (“Heim” manufactured by Toyobo Co., Ltd.) filament (75P / 48F) to which an organic phosphorus compound was added was used, and 0.5 g / l of sodium tripolyphosphate and nonionic were used. After scouring with a scouring bath containing 2 g / l of a surface-active agent, it was processed with a bath having the following formulation to examine flame retardancy and test antibacterial and antifungal effects.

Formulation Ultrafine zinc oxide powder 2% by weight Flame-retardant polyester emulsion 3% by weight (TK Set 43 manufactured by Takamatsu Yushi Co., Ltd.) Antimony trioxide powder 3% by weight Water balance Prepared as a suspension

The curtain fabric was padded with the treatment bath of the above formulation and squeezed at a drawing rate of 80% to obtain 130
It was dried with hot air at ℃ and heat-treated at 160 ℃ for 1 minute.

The curtain fabric after the treatment was sampled at 5 points each before and after the washing, and the flameproofness was tested. In both cases, the afterflame time was 2 to 3 seconds and the dust time was 3 to 4 The carbonization area was 0.5 seconds, the carbonization area was 20 to 27 cm ² , and the carbonization length (when slackened) was 15 to 19 cm, all of which passed the Ministry of Internal Affairs and Communications Fire Defense Law flameproof performance standard.

The flame retardancy test was conducted based on the Ministry of Internal Affairs and Communications Fire Defense Law flameproof performance standard (JISL-1091, A-1 method).

Next, an antibacterial and antifungal test of the treated cloth was conducted. The test method was performed according to the "Shake flask method" of "Testing method for processing effect evaluation of sanitary processed products" established by the Textile Products Sanitary Processing Council.

That is, first, a cultivated bacterial suspension (used strain:
Klebsiella pneumoniae ATCC 4352) is diluted 1000-fold with a phosphate buffer to prepare a test bacterial solution.
The sample and the test bacterial solution are added to an Erlenmeyer flask that has been sterilized by heat and humidity, and the viable cell count is measured [A].

Then, the Erlenmeyer flask is shaken for 1 hour, and the number of viable bacteria is measured [B].

The sterilization rate was calculated by the following formula.

The result of the test is that the sterilization rate of unwashed cloth is 99.9.
%, The sterilization rate was 98% or more after 5 times of washing (F-1 method), and excellent antibacterial properties were shown even after washing. Also, this sample showed a sterilization rate of 98% or more in the same test even after 6 months. Furthermore, this sample did not cause yellowing even after 6 months.

[0030]

Example 2 80 g of flame-retardant polyester (“Heim” manufactured by Toyobo Co., Ltd.) short fiber cotton (1.5 D, 20 mm)
A non-woven fabric web of / m ² was subjected to antibacterial and antifungal treatment with the following formulation.

Prescription Ultrafine zinc oxide powder 2% by weight Flame-retardant polyester emulsion 3% by weight (TK set 413, manufactured by Takamatsu Yushi Co., Ltd.) Water balance Prepared as a suspension

The non-woven fabric web was padded in the treatment bath of the above formulation, squeezed to 100%, dried at 130 ° C., and then heat treated at 160 ° C. for 2 minutes.

The treated nonwoven fabric was subjected to a flameproofness test in the same manner as in Example 1. Each sample had an afterflame time of 2 to 2.5 seconds, a dust time of 3 to 4.5 seconds, and a carbonization area. The results of ^{20 to} 26 cm ² and carbonization length of 15 to 17 cm were obtained, and all passed the Ministry of Internal Affairs and Communications Fire Act Fire Prevention Performance Standards.

In the antibacterial and antifungal performance test, the non-woven web was sterilized at a rate of 99.9% or more before being washed (F-1
Method) After 5 times, excellent results with a sterilization rate of 97% or more were obtained. 6
This result remained almost unchanged even after the lapse of months.

[0035]

[Comparative Example 1] After the curtain fabric made of the tricot knitted fabric made of the flame-retardant polyester filament used in Example 1 was scoured, an ammonium salt-containing silicone resin ("SX-60" manufactured by Takamatsu Yushi Co., Ltd., antibacterial and antifungal) was used. 2% by weight of processing agent)
A padding process was performed in the treatment bath, the squeezing ratio was 80%, the squeezing ratio was 80%, the film was dried with hot air at 130 ° C., and a heat treatment was performed at 160 ° C. for 1 minute.

The treated fabric was subjected to a flameproof test in the same manner as in Example 1. As a result, the afterflame time was 4 to 4.5 seconds, and the dust time was 5.5 seconds or more before and after washing. Carbonization length 25
cm to 40 cm, carbonized area 35 to 45 cm, and none of them passed the Ministry of Internal Affairs and Communications Fire Act flameproof performance standard.

[0037]

[Comparative Example 2] A non-woven fabric web made of flame-retardant polyester short-fiber cotton used in Example 2 was treated with 3 parts by weight of an ammonium salt-containing silicone resin ("SX-60" manufactured by Takamatsu Oil & Fat Co., an antibacterial and antifungal agent). % Acrylic ester resin binder (Kanebo NSC, "Iodosol A-2"
3 ") padded with 30% by weight treatment bath, 1
It was squeezed to 00%, dried at 130 ° C., and then heat-treated at 160 ° C. for 2 minutes.

The obtained non-woven fabric was tested for flameproofness in the same manner as in Example 1. The afterflame time was 4 seconds or longer, the dust time was 5.5 seconds or longer, the carbonization length was 25 to 40 cm, and the carbonization area was 40.
The carbonization length was ˜50 cm ² and the carbonization length was 25 to 40 cm, and none of them passed the fire prevention performance standard of the Fire Service Law of the Ministry of Home Affairs.

[0039]

[Effect] As described above, the textile product according to the method of the present invention exhibits high antibacterial properties without deteriorating the original flame retardancy, can maintain its effect for a long period of time, and is discolored. There is a feature that does not occur, and its application is wide for curtains, sheets, etc. used in hospitals, food factories, etc.

Claims (1)

[Claims] 1. An antibacterial property, characterized in that zinc oxide or a ceramic powder mainly composed of zinc oxide is applied to flame-retardant fibers containing phosphorus-based, nitrogen-based, sulfur-based, etc. organic flame retardants in the fibers. And a method of manufacturing flame-retardant textile products.