JPH0158966B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a carpet having mildew and insect repellent properties. More specifically, insect repellents and antibacterial agents are dispersed and fixed in the synthetic resin latex that is applied to the back side of the carpet to give it stability.
The present invention relates to a carpet that provides antibacterial and insect repellent effects to the space occupied by carpet piles by slowly releasing these agents while the carpet is being laid. Furthermore, when dispersing the drug in synthetic resin latex, the drug is adsorbed in advance to a porous adsorbent, the adsorbent containing the drug is uniformly dispersed in the latex, and then applied to the back side of the carpet. A carpet is then obtained by heat treating and drying to harden the latex. In the prior art, there is a method in which an antibacterial agent is contained in the carpet pile yarn, but there is no method in which the antibacterial agent is dispersed in the backing material of the carpet so as to release the agent in a sustained manner. Carpet piles impregnated with or containing chemicals have the following problems. First, it is not suitable as a carpet for general household use because there is a risk that young children may gnaw on it. In addition, pile yarn containing chemicals cannot be subjected to antifouling treatment such as fluorine treatment, so it is easily stained and has practical limitations. The present inventor was able to arrive at the present invention as a result of intensive research into methods for incorporating chemicals into carpet backing materials. Although the drug present in the backing material exerts its own effect in the space of the carpet pile, it is advantageous in that there is no danger at all even if a small child touches or licks the pile. The present invention provides an antibacterial agent and/or an insect repellent, at least one of which has the property of being vaporizable at room temperature, and which is mainly adsorbed and dispersed in a porous adsorbent powder.
This is a carpet whose back surface is coated with a resin containing 0.1 to 20% by weight. In particular, the above-mentioned chemicals are characterized in that they are adsorbed on porous adsorbent powder, dispersed in a synthetic resin, and applied to the back surface of the carpet. To explain the present invention, resins for carpet lining include SBR resin, vinyl chloride resin,
Vinyl acetate resin, natural rubber, synthetic rubber, etc. can be used, and the most commonly used emulsion or suspension of SBR resin can be applied to the present invention. Next, drugs such as antibacterial agents and insect repellents that are vaporizable at room temperature can be applied to the present invention.
For example, α-bromucinnamaldehyde, creosote, paradichlorobenzene,
Examples include 2,4,5-tribromophenol, parachlorometacresol, orthophenylphenol, parachloromethaxylenol, benzylbromoacetate, and the like. The above-mentioned antibacterial agents and insect repellents are adsorbed and fixed on a porous adsorbent and dispersed in the resin latex. This porous adsorbent includes activated carbon, silica gel, activated alumina, silicic anhydride, boxide, natural zeolite,
Examples include full earth, white clay, and cyclodextrin. The following methods can be used to adsorb antibacterial agents and insect repellents onto porous adsorbent materials. First, when the drug is a liquid, adsorbent powder or adsorbent particles are immersed in the liquid drug, and after the liquid is removed, fresh adsorbent powder is added and mixed well. This mixture is aged for one day and night. The drug is highly stable if it is about 10% by weight based on the adsorbent powder. If the drug is solid, the adsorbent powder adsorbing the drug can be prepared in the same manner as above by dissolving the drug in a solvent to create a solution and immersing the adsorbent powder in this drug solution. . As for the method of dispersing the adsorbent powder in which the drug is adsorbed and fixed in the backing resin, it is sufficient to simply mix and knead since most of the backing resins are suspensions or emulsions. Generally, latex liquid has a high concentration (70-80
%), it is necessary to stir sufficiently to make the dispersion uniform. The drug-dispersed latex is applied using carpet back coating machines, which are currently widely used. A reverse coating method is preferred in order to obtain a uniform coating layer. In the case of tufted carpet, the scrim is tufted and then a back coating of latex is applied. The amount of coating varies depending on the pile weight, but the average dry weight is 1 to 1.5 kg/m ²
Good. After coating, apply jute backing if necessary. Next, it is dried at about 150°C for 5 to 10 minutes. The adsorbent powder adsorbing the drug accounts for 10% or less of the dry weight of the synthetic resin latex, preferably
3-5% is good. 5% powder adsorbs 10% drug
If mixed, 0.5% of latex solid content
% of drugs will be mixed in. The backing layer of the carpet may contain antibacterial agents and/or
Contain 0.1 to 20% by weight as an insect repellent.
A small amount of the chemical, less than 0.1%, will not provide antibacterial or insect repellent effects. In addition, if the content exceeds 20% by weight, the chemical is volatile and gives off a strong odor, making it impractical. When the drug is dispersed in an amount of about 5 to 20% by weight relative to the latex, it may or may not be fixed to an adsorbent. According to the present invention, a chemical is fixed to the backing of a carpet or other similar rug, and by volatilization, a carpet with antibacterial and insect repellent effects can be obtained.
The effect lasts for up to three years, the rug is hygienic, and the living environment and livability can be significantly improved. The present invention will be further explained below with reference to Examples. Example 1 An example using a nylon tufted carpet is shown. A level loop pile carpet was made using three plies of 1225de/68 filament nylon tricolor discolored yarn at a 1/10 inch tufting density. The basis weight is 1.1Kg/ ^m2 , the pile length is 5mm,
The base fabric is polypropylene thread plain weave with a density of 22 threads x 16 threads.
A book/inch was used. It was dyed using a continuous dyeing machine using a conventional method, and after drying, latex was applied using a reverse coater. To the latex, 10% by weight of α-promucinnamaldehyde was adsorbed and fixed in Aerosil (manufactured by Degutsa) and was added thereto. The formulation of the latex is as follows. Carboxyl-modified SBR resin latex 100 parts Aluminum hydroxide 300 parts Carboxymethyl cellulose 1.5 parts Adsorbent (chemical treatment) 20 parts Stabilizer 3 parts This latex composition was thoroughly stirred and
1.50, viscosity 19500CP (centipoise) solids concentration
Got 80% consistency. This was coated with a reverse coater to reduce the water content to 1.3
Kg/ ^m2 , and at the same time laminated with juute cloth with a basis weight of 7 ounces/square yard, and finished by treating in a hot air dryer at 140°C for 5 minutes. Let this carpet be A. Example 2 A cut pile carpet was manufactured by tufting a 5 1/2 thick spun yarn of cotton-dyed acrylic fiber using a 1/8'' gauge tufting machine.The scrim was made of polypropylene slit. 24 pieces of thread x 13
I used one with a density of books/inch. The latex used was a commercially available polyacrylic acid ester resin that had already been mixed. For the drug, parachlorometacresol was dissolved in acetone and adsorbed onto natural zeolite, and the adsorbed amount of 15% was mixed at 10% based on the solid content of the acrylic resin. Resin was applied to the carpet to a dry weight of 0.8 kg/square meter, and the dried carpet was sprayed with Scotch Guard and finished by slitting both ears. This carpet is called B. Example 3 An antibacterial test was conducted on carpets A and B produced in the steps of Examples 1 and 2 as follows. A sample piece with a diameter of 1 cm was cut out from each carpet and placed on the culture medium side of a shear dish with the pile side facing down. For fungi, spores were streaked in parallel lines on a potato agar medium with a platinum loop, the pile side of the carpet sample was placed on the medium surface, the lid was covered with a shear glass lid, and the growth was measured at 27°C.After 7 days, the degree of growth was determined. was measured. For bacteria, use the agar plate streaking method and inoculate each plate with one loopful of a 24-hour culture of Meat Cinnabou bouillon. Next, the pile side of the carpet sample piece was placed against the medium surface, and then the sample was covered with a lid and cultured at 37°C, and the degree of proliferation was determined after 48 hours. The test results are shown in Table 1 along with commercially available nylon tufted carpet C.

【table】

[Table] Example 4 The insect repellent effect was also tested on the same carpet as in Example 3. 2 in the center of the chale (diameter 9.5cm, height 2.5cm)
Place one carpet sample piece cut into cm diameter.
The target insect was placed inside the container, the lid was closed, and comparisons were made. The results are shown in Table 2.

[Table] Shows the number of days until death of the 5-year-old.

Claims (1)

[Claims] 1. Antibacterial agents and/or insect repellents of 0.1 to 20% are mainly adsorbed and dispersed in porous adsorbent powder, at least one of which has the property of being vaporizable at room temperature.
A carpet whose back surface is coated with a resin containing a range of % by weight.