JPH0340865A - Production of offensive smell decomposing yarn - Google Patents

Abstract

PURPOSE:To obtain cloth for decomposing an offensive smell component in steam by weaving or knitting conjugate type thermoplastic synthetic yarn comprising a specific core layer and a specific skin layer into cloth and etching the cloth by plasma to form dented parts extending from the surface of the skin layer to the core layer. CONSTITUTION:A core layer 15 comprising a thermoplastic polymer containing anatase type titanium oxide particles and metal particles 16 of platinum group is bonded to a skin layer 18 comprising a fiberforming thermoplastic polymer, the prepared conjugate type thermoplastic synthetic yarn is used to form cloth. The cloth is etched by plasma to give cloth suitable for apparel or interior, having preferably 1-10 dented parts 17 extending from the surface of the skin layer to the core layer based on 1mu square, decomposing an offensive smell component such as ammonia by titanium oxide exposed to the dented parts, decomposing and modifying offensive smell substances.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing malodor decomposable fibers having the function of decomposing or modifying malodorous substances contained in water vapor.

Object of the Invention The object of the present invention is to provide a method for producing malodor decomposable fibers having the ability to decompose or modify FR of malodorous substances, and to provide a plastic synthetic fiber using composite vA and a composite structural fabric.

BACKGROUND ART Conventionally, in order to eliminate indoor odors, a method was used in which 111 fL of indoor air was introduced into a column filled with activated carbon so that malodorous components were adsorbed onto the activated carbon.

Even if the odor component concentration is less than 1100 PP, discomfort is generally felt. This small amount of water vapor is contained in the water vapor in the air, but? Although g-grade charcoal adsorbs water well, it has the disadvantage that it cannot sufficiently remove water vapor containing malodorous substances.

[Oval of invention]

The present invention successfully solves the above-mentioned drawbacks of the prior art, and has invented a method for producing a III material or knitted material that has the ability to decompose or modify malodorous substances in water vapor. Specifically, regarding a thermoplastic synthetic fiber formed by bonding a core layer made of a thermoplastic polymer containing anatase-type titanium oxide particles and platinum metal particles and a skin layer made of a fiber-forming thermoplastic polymer, the silent plastic synthetic fiber is This is a method for producing malodor decomposable fibers, which is characterized by forming a fabric and then etching the fabric with plasma to form a recess extending from the surface of the skin layer to the core layer.

This is based on the knowledge that the photocatalytic effect of a photosemiconductor coating decomposes or modifies malodorous substances.

The titanium oxide obtained by FIL spasotapreating was analyzed using the Xll analysis method to form anatase crystal I'I.
This anatase-type titanium oxide exhibits unique optical properties when exposed to light energy. Specifically, titanium oxide acts as an n-type semiconductor and can be oxidized by light energy. Titanium
02) inside.

A positive space charge layer is created, creating a potential gradient.

When electrons are excited by light absorption from the lower electron-filled electron band (valence band) to the upper open electron band (charged conduction band), this potential gradient causes electrons and holes (as if they had a positive charge). When the odor comes into contact with the photocatalyst in this state, the odor substance is decomposed or reformed by the energy of reduction and oxidation of the photocatalyst. is considered to be carried out.

This is because the platinum metal supporting anatase titanium oxide promotes the redox action of titanium oxide when it comes into contact with water vapor in the air.

The present invention provides a composite fiber formed by bonding a core layer made of a thermoplastic polymer containing anatase-type titanium oxide particles and platinum metal particles and a skin layer made of a fiber-forming thermoplastic polymer. Composite structure using thermoplastic synthetic fibers.

The average particle size of titanium oxide particles for anatase type titanium oxide is generally 5μ or less, but 0.001 to 1.
Particles in which Oμ accounts for 60% by weight are suitable. The white metal particles supporting the anatase titanium oxide particles are characterized in that they are metal particles selected from the group of platinum, palladium, rhodium, iridium, and ruthenium.

The thermoplastic polymers that make up the core layer are polyester, polyamide, polyvinyl, polypropylene, polyether, polycarbonate, and polyolefin.

Any known thermoplastic polymer such as polyphenylene sulfide can be used.

In addition to anatase type titanium oxide particles and white metal particles, a dispersant, a colorant, a pigment, a stabilizer, and other additives can be added to the polymer of the core layer.

The skin layer is made of polyester, polyamide, polyvinyl,
Any known thermoplastic polymer such as polypropylene, polyether, polycarbonate, polyolefin, polyphenylene sulfide, etc., as long as it is a fiber-forming polymer that has good bonding properties with the thermoplastic polymer constituting the core layer. can be used.

Any type of bonding between the core layer and the skin layer is possible.

Typical examples are shown in FIGS. 1 to 3. FIG. 1 is a core-sheath type, FIG. 2 is an annular type, and FIG. 3 is a multi-core type.

If the core layer is made of a crystalline polymer with a melting point lower than that of the skin layer, and the stretching is carried out at a temperature between the melting points of the crystalline polymer of the skin layer and the melting point of the crystalline polymer of the core layer, the core layer polymer will When melted, the particles are uniformly dispersed in the polymer, but when crystallization progresses by cooling and solidification or stretching, the particles are removed from the crystalline parts and concentrated between the crystals, that is, in the amorphous region, and the particles are separated from each other. approach or come in contact with; Further, it is known that the degree of crystal orientation in each layer of the core layer and skin layer is higher at the center of each layer.

FIG. 4 of the particles after drawing shows a model of the implicit arrangement of the particles after drawing the core-sheath type synthetic fiber shown in FIG. The particles uniformly dispersed in the core +1112 are concentrated in the peripheral portion I3 of the core layer 12 after stretching and crystallization. The thermoplastic polymer constituting the core layer may have a degree of crystallinity as long as it has enough strength and elongation to be used as a fiber, but preferably the degree of crystallinity is 40% or more. Preferred malodor decomposable II fibers have a core layer containing titanium oxide particles having a photosemiconductor coating of 50 to 85% by weight, and a depth of 0 from the fiber surface.
．． It is a fiber in which a core layer containing titanium oxide particles having an optical semiconductor coating is present at a position of 0.05 to 0.10 μm.

The present invention is characterized by a filter cloth composed of composite fibers formed by bonding a core layer made of a thermoplastic polymer containing anatase-type titanium oxide particles and platinum metal particles and a skin layer made of a fiber-shaped thermoplastic polymer. Use composite structural fabrics.

The present invention uses thermoplastic synthetic fibers, which are the composite fibers of the core skin layer, as a cloth, and then etches the IIa material with plasma to form a concave portion reaching from the surface of the skin layer to the core layer. Il!, a malodor-degradable IlIM characterized by He discovered the JLL method.

As the cloth, a known m-knitted RIi weave can be used. A thermoplastic synthetic fiber formed by bonding a core layer made of a thermoplastic polymer containing titanium oxide particles and T4 conductive particles having an optical semiconductor coating and a skin layer made of a fiber-forming thermoplastic polymer and other known fibers. Mixed weaves and knits can also be used.

FIG. 6 is an example of a Jl product with a mixed weave. This figure shows a mixed woven fabric in which the core-sheath type 11I fiber shown in FIG. 1 is used for the weft yarn 20 and Tetoron filament is used for the warp yarn 21 to form a plain weave structure. Plasma etching is applied to one or both sides of the cloth. The method of etching with plasma includes a method of etching with plasma while continuously winding up and feeding out m objects in a vacuum container;
There is a method of continuously winding up and feeding m objects outside a vacuum container, and etching with plasma while passing 11\@ into the vacuum container.

As an example, FIG. 7 shows a schematic configuration of an H-setting device that performs plasma etching while continuously winding up and feeding a fabric in a vacuum container. In FIG. 41 is a gas inlet. The base material 61 is unwound from the original fabric roll 62, brought into surface contact with the drum cathode 63, and then wound onto the winding roll 61. A flat plate type electrode is installed in the vacuum chamber, and when the vacuum chamber is evacuated and a predetermined amount of inert gas such as argon and active gas such as M, nitrogen, and hydrocarbons are introduced and applied. , a glow discharge occurs,
High energy ions are generated and etch the substrate. At this time, due to the combination of the irradiation effect of the inert gas ions, the kinetic energy effect of the ions, and the effect of the charge possessed by the ions, a modified layer with truncated molecular chains is formed on the surface of the synthetic fiber, and the II fiber surface g1m is uneven. It causes the formation of

As for the plasma processing conditions, for example, a mixed gas of oxygen and an inert gas such as argon is used as the atmospheric gas. Oxygen partial pressure 2X 10-4 to 2x10-3 Ar
2/02 performs discharge at 80/20, the discharge power is 50-500W, the gas flow rate is 10-300 milliliters, and the processing time is 0.2-10 minutes. Next, the plasma-treated fabric or silk material is washed and dried to remove impurities adhering to the surface of the R material or silk material.

As a result, on the surface of the skin layer, the number of recesses is 1 to 1 per square μ.
10 pieces are formed. As shown in Figure 5, the concave portion is
Depending on the depth of the core layer from the surface and the shape of the core layer in the fiber cross section, some particles reach the surface of the core layer, some reach the inside of the core layer, and some penetrate the particle layer of the core layer. The purpose of the present invention can also be achieved in this case.

Odors to which the present invention is directed include all malodorous components contained in water vapor in the air, such as ammonia, amines, thioethers, carbon sulfide, and hydrocarbons.

In the present invention, the size of water vapor particles is o or oo.

It is noted that the size of water particles is 4μ, and the size of water particles is 100μ. By etching M or knitted fabrics with plasma, they become fibers! The focus is on forming 2m unevenness.

The size of water vapor particles is 0.0004μ, and the size of water particles is 1
00μ, so it has a waterproof and moisture permeable function. Particles of water vapor in the outside air reach the core layer through the recesses of the skin layer, and are sensitive to the titanium oxide particles and platinum metal particles having the optical semiconductor coating.

Since the diameter of water vapor particles is larger than 0.0004 μm in such a recessed portion, water vapor can pass therethrough. In addition, since such concave portions are smaller than the water particle diameter lOOμ, water particles cannot pass through them.The target odors are ammonia, amines, thioethers, carbon sulfide, hydrocarbons, etc. in the air. This applies to all malodorous components contained in water vapor.

The malodor decomposable fiber of the present invention decomposes malodorous substances contained in water vapor in the air under sunlight or sunlight-like light such as a xenon lamp.

The fabric according to the invention is used for apparel, interior decoration, air filters, etc.

Next, the present invention will be explained by examples.

〔Example〕

4% of anatase-type titanium oxide coated particles with an average particle size of 0.05μ and platinum particles (particle size of 0.02μ) were mixed, and the mixed particles were mixed with a polyethylene polymer (molecular weight approximately 48,000. The core is a polymer mixed with a crystallinity of 77%, and the molecular weight is approximately 16. 000.
11 points 215℃, 45% crystallinity nylon sheath,
It was spun from an orifice with a diameter of 0.25 cm and 275°C at a composite ratio of 1/9, oiled, wound at 1500 m/min, stretched to 3.15 times at 80°C, and further stretched to 180° under tension.
A drawn yarn of 30 denier/6 filaments was obtained by heat treatment at .degree. A woven fabric was made using such a core skin type filament yarn as the weft yarn and a 50 denier polyester filament yarn as the warp yarn.

After sewing it into a blouse, a wearing test was conducted.

Gasoline-powered car exposed to sunlight (exhaust 11300
Wearing experiment of the blouse was carried out under conditions of CC5 mileage M6800 KM, no air conditioning, 30 minutes of driving just before the experiment, temperature of 28 degrees, driving time of 1 hour, and clear weather at the time of driving). As shown in Table 1, the degree of pleasure and displeasure was measured on a 9-fi scale. Dermal strength was measured on a six-level scale as shown in Table 2. At the beginning of the experiment, the level of comfort and discomfort was -2.5 and the strength of performance was 2 and 0, but at the end of the wearing experiment, the level of comfort and discomfort was +2.
1. Dermal strength was 0.5, and 81 ability to decompose or modify bad odors was observed.

Table 1 Table 2 [Effects of the Invention] The method for producing malodor decomposable fibers of the present invention utilizes the malodor decomposition or modification function of anatase-type titanium oxide in the form of textiles related to daily life, such as apparel, interior air filters, etc. It is clear that it is economical and effective because it can be used in

It is clear that the composite elliptic thermoplastic synthetic fiber of the core layer skin layer of the present invention has the effect of exhibiting the function of decomposing bad odors.

It is clear that the thermoplastic synthetic fiber of the composite structure of the core layer skin layer of the present invention has the effect of further developing the function of decomposing bad odors by adding fII to AT materials.

[Brief explanation of drawings]

Claims (3)

[Claims] (1) Regarding a thermoplastic synthetic fiber formed by bonding a core layer made of a thermoplastic polymer containing anatase-type titanium oxide particles and platinum metal particles and a skin layer made of a fiber-forming thermoplastic polymer, the thermoplastic synthetic fiber is cloth and pears,
A method for producing malodor-decomposable fibers, comprising: then etching the cloth with plasma to form a recess extending from the surface of the skin layer to the core layer. (2) A composite thermoplastic synthetic fiber characterized by a composite fiber formed by bonding a core layer made of a thermoplastic polymer containing anatase-type titanium oxide particles and platinum metal particles and a skin layer made of a fiber-forming thermoplastic polymer. (3) A composite fabric comprising composite fibers formed by bonding a core layer made of a thermoplastic polymer containing anatase-type titanium oxide particles and platinum metal particles and a skin layer made of a fiber-forming thermoplastic polymer. structural fabric