JPS62215010A - Deodorizing fiber - Google Patents

Abstract

PURPOSE:To obtain the titled fiber having excellent deodorizing property, processability, durability and long-acting performance, by adsorbing and impregnating Fe<2+> and L-ascorbic acid in inorganic solid fine particles to obtain a deodorizing material and applying the material to a thermoplastic polymer fiber having a specific fineness. CONSTITUTION:A deodorizing material is produced by adsorbing and impregnating bivalent iron ion and L-ascorbic acid to inorganic solid fine particles (preferably having average particle size of 1-30mum) such as fine zeolite particles. The deodorizing material is applied at an amount of preferably 2-30wt% to a fiber made of a thermoplastic polymer (preferably polyethylene, etc.) and having an average filament fineness of 1-80 denier to obtain the objective fiber. Preferably, the fiber has noncircular cross-section, the noncircularity coefficient (D/d) of the fiber is >=1.1 and irregularly varying along the fiber axis and the cross-sectional area of the fiber perpendicular to the fiber axis irregularly varies along the fiber axis.

Description

[Detailed Description of the Invention] <Industrial Application Field> The bad odor that is common in daily life is a representative sensory pollution that directly and indirectly damages the human body.

The deodorizing IN of the present invention is excellent in adsorbing various bad odors that have a negative impact on the human body, and has excellent processability and durability. It can be used as a material for things such as futon cotton, padded cotton, batting, various felts, carpets, interior materials for buildings and automobiles, etc.

<Prior art> General bad odors include ammonia, nitrogen compounds such as amines, hydrogen sulfide, sulfur compounds such as mercaptans, aldehydes, ketones, fatty acids, hydrocarbons, etc., and ammonia is removed by the bad odor prevention method.

Methyl mercaptan, hydrogen sulfide, methyl sulfide, trimethylamine, acetaldehyde, styrene.

Methyl disulfide and other substances are designated as specific malodorous substances and are regulated.

Therefore, various adsorbents have been used to remove these bad odors. For example, inorganic adsorbents such as activated carbon, silica gel, zeolite, activated clay, and molecular sieve, ion exchange resins, and liquid adsorbents containing extracts of plants of the Camellia family as a main component are well known.

These deodorants are used alone, or in liquid form they are applied to fibers by coating or spraying.

However, the above-mentioned deodorizing materials have insufficient deodorizing properties and are inferior in durability (especially washing resistance). Il fibers containing inorganic adsorbents have been studied with the aim of improving durability, but while those with a fineness of 100 de or more are known, those with a fineness of less than that have not yet been obtained.

<Objective of the Invention> The object of the present invention is to provide a fabric that has excellent deodorizing properties against various bad odors, has excellent processability, durability, and slow-release properties, and has an average single yarn fineness of 1.
An object of the present invention is to provide deodorizing fibers having a deniers of ~80 denier.

<Configuration of the Invention> (1) That is, the present invention provides a deodorizing iIN in which a deodorizing material is added to fibers, in which the deodorizing material is composed of divalent iron ions and L
- A deodorizing fiber characterized by being inorganic solid fine particles adsorbed and impregnated with ascorbic acid, the fibers being made of a thermoplastic polymer and having an average single fiber fineness of 1 to 80 deniers (a) 80 deniers of inorganic solid fine particles. Weight or more is average particle size 1-5
Deodorizing fiber (3) according to claim 1, which has a particle size of 0 μm. Claim 1 or 3, in which 1 to 40% by weight of deodorizing material is added to the fiber. (Deodorizing fiber (4) described in section '2J) The cross-sectional shape of the fiber is non-circular and its irregularity coefficient (D
/d) is at least 1.1, the irregularity coefficient varies irregularly along the fiber axis direction, and the area of the cross section perpendicular to the fiber axis is irregular along the fiber axis direction. The deodorizing fiber according to any one of claims (1) to (3) is changed to:

The thermoplastic polymer used in the present invention is one that can be thermally melted at a temperature at which L-ascorbic acid does not decompose and is capable of forming fibers. Preferred are polyolefins, particularly polypropylene and polyethylene. The average single fiber fineness of the deodorant fiber of the present invention is 1 to 80 de. If it exceeds 80 de, it will be difficult to mold the woven or knitted material and the deodorizing properties will be reduced, so that its uses will be limited.

If it is less than 1 de, it becomes difficult to contain inorganic solid fine particles. As inorganic solid particles, divalent iron ions and L
- Any material may be used as long as it can adsorb and impregnate ascorbic acid. The average particle size is preferably in the range of 1 to 50 μm. Particularly preferably, the thickness is in the range of 1 to 30 μm. The content of inorganic solid fine particles relative to the fiber is 1 to 40% by weight, preferably 2 to 30% by weight. If it exceeds 40% by weight, it is difficult to obtain fibers with an average single filament fineness of 1 to 80 de, and if it is less than 1% by weight, no deodorizing effect can be obtained.

The deodorizing m-fiber of the present invention may be in the form of filaments or short fibers.

In the case of a short am shape, the average fiber length is 10 to 500 m, preferably 20 to 400 m, and more preferably 25 to 150 m. Moreover, the deodorizing IIN of the present invention is a pigment 1M fuel.

It may contain a stabilizer, a fluorescent whitening agent, a dispersant for improving the dispersion of inorganic solid fine particles, and the like.

The shape of the fibers constituting the deodorizing mN in the present invention may be circular in cross section perpendicular to the fiber axis direction, but it is preferable that the fibers be non-circular and have a large surface area in order to improve the deodorizing performance. It is preferred that the profile coefficient (D/d) is -at least 1.1 and that the profile coefficient varies irregularly along the fiber axis direction. Further, it is preferable that the cross-sectional area of the fibers perpendicular to the fiber axis varies irregularly along the axial direction.

Here, the degree of non-circularity of the cross-sectional shape is the circumference 2 of the cross-section.
It can be expressed by an irregularity coefficient expressed as the ratio (D/d) of the maximum distance between parallel lines (D) and the minimum distance between two circumscribed parallel lines (d>).

Fibers having such a shape can be easily produced by the method described in Mei 1 of JP-A-58-91804, which was previously proposed by the present inventors. In other words, when producing a filamentary fiber bundle by extruding a thermoplastic synthetic polymer melt through a spinneret having many slits, there is discontinuity between adjacent slits on the discharge side of the melt from the spinneret. Target protrusions are provided such that the melt extruded from the slit formed through the concave area between the protrusions can come and go with the melt extruded from other adjacent slits. The melt is extruded from the spinneret, and at this time, a cooling fluid is supplied to the melt discharge surface of the spinneret and its vicinity, and while cooling the melt, the melt extruded through the slits is withdrawn. A large number of separated 1! This is a method to obtain a fibrous material by converting it into a dark blue rivulet and solidifying it. The thus obtained ma has a non-circular cross section and its irregularity coefficient (D/d
) is small (both are 1.1, the irregularity coefficient varies irregularly along the fiber axis direction, and the area of the cross section perpendicular to the fiber axis varies irregularly along the axial direction) As the spinneret, it is preferable to use a wire mesh or a mesh-like perforated plate formed by photo-etching.The opening of the wire mesh is determined by the thickness of mi and the like.

Furthermore, during the spinning, at least the discharge surface of the die is preferably heated. In order to heat the discharge side surface of this die, it is necessary to supply energy to the die surface. There are various methods for this, including cases where the surface of the die is made to generate heat by itself, cases where it is heated by heat transfer, and cases where both are used in combination.

As a means for causing the surface of the cap to self-heat, the surface of the cap is made of a conductive material, connected to a DC or AC power source, and energized to utilize the Joule heat generated on the surface of the cap (hereinafter referred to as energization heating method). A method that utilizes so-called induction heating, in which the surface of the cap is made of a conductor and an induced magnetic field of a suitable frequency is applied to it to generate eddy current and generate heat.

There is a method that utilizes so-called dielectric heating, in which the surface of the cap is made of a dielectric material, and an electric field of a suitable frequency is applied thereto to cause dielectric loss and heat generation.

As a means for heating the surface of the mouthpiece by heat transfer, the surface of the mouthpiece itself or its vicinity is formed into an organization composed of thin tubes, and a heating medium is flowed through the thin tubes to heat the surface of the mouthpiece (hereinafter referred to as a method). A method of heating the surface of the cap by radiation by projecting light containing a wavelength that can be absorbed by a material on the surface of the cap, such as infrared rays, onto the surface of the cap (hereinafter referred to as a radiation heating method), etc. be.

As is clear from the above description, when heating the nozzle on the discharge side surface, the temperature near the nozzle surface generally becomes higher than the temperature of a certain range surrounding the vicinity.

Materials that can be used in the electrical heating method and dielectric heating method include platinum, gold, silver, titanium, vanadium, tungsten, iridium, molybdenum, and palladium.

Iron, nickel, chromium, cobalt, lead, zinc.

Fully flexible elements such as bismuth, tin, and aluminum, alloys such as stainless steel, nichrome, tantalum, brass, phosphorous iron, and duralumin, and graphite.

silicone, germanium, selenium, tin oxide.

Inorganic compounds mainly exhibiting semiconductor properties such as indium oxide, iron oxide, nickel oxide, polyacetylene,
It is advantageous to use a material having a specific resistance of about 10<-7> to 10<9 >[Omega]ctx, such as an organic compound exhibiting semiconductor properties such as polyphenylene, formed in the spinneret of the above-mentioned spinning mode.

All of the caps described above are electrically conductive and serve the purpose of the present invention. Other examples include a structure in which the surface of a glass sphere bead is coated with silver and brought into contact with pressure to make it conductive, and a porous ceramic plate with a conductive base structure in which metals such as aluminum are vapor-deposited onto ceramic fibers such as alumina and zirconia and then pressure-formed. Examples include a conductive cap structure in which a graphite particle dispersion is immersed and deposited, and other possible structures can be modified and implemented in various ways.

The conductive nozzle for the current heating method is attached to the extruder outlet, and should be installed so that the desired current flows through the conductive nozzle.

It is also possible to achieve the desired performance by making the extruder and the conductive die conductive and appropriately distributing the current flowing through the extruder and the conductive die.

As the cap, it is preferable to use a mesh (wire mesh) made of a substance that generates heat when energized.

The deodorizing fiber of the present invention may be used as it is in bags or packaged, or as a non-woven fabric or a knitted fabric. It can also be mixed with natural fibers such as cotton, wool, and linen, and synthetic fibers such as polyester and nylon, and used as structures such as woven and knitted fabrics, stuffed cotton, and nonwoven fabrics.

<Effects of the Invention> The deodorizing fiber of the present invention can be used to eliminate various odor-producing substances, such as hydrogen sulfide with a rotten egg odor, mercaptans with a rotten onion odor,
It has an excellent deodorizing effect on trimethylamine, which has a rotten fish odor, ammonia, which has a pungent odor, rhofluoric acid, which has a sweat odor, etc.

In addition, compared to conventional deodorant materials, it has excellent slow-acting properties that maintain its deodorizing effect for a long time, and can be used for a long time.It also has excellent durability such as washing resistance, and can be easily processed into various shapes. It has the excellent effect of being able to

<Example> The present invention will be explained in detail with reference to Examples below.

As a method for evaluating deodorizing properties, the deodorizing rate was determined by the following method.

A fibrous sample with a deodorizing rate of 10 g is placed in a desiccator four times, the pressure is reduced with an aspirator, and then a measuring gas (or liquid) is injected into the desiccator under constant suspension. Thereafter, the inside of the desiccator is returned to atmospheric pressure, and the gas concentration at that time is set as the initial gas concentration. The initial concentration is adjusted to 2t)O to 300ppm. Furthermore, the gas concentration in the desiccator after 3 hours was measured and compared with the initial concentration, and the deodorization rate was calculated using the following formula.

Deodorization rate - Example 1 Using an apparatus as shown in Figure 1, fine zeolite particles with an average particle size of 10 μm impregnated with ferrous sulfate and L-ascorbic acid (■manufactured by Anico) were added at a ratio of 6% by weight to the polymer. Then, using polyethylene wax as a dispersant, polypropylene (
S-1) 5M (manufactured by Ube Industries, Ltd.) was mixed and melt-spun to obtain an I fiber bundle.

That is, the above chips are fed from a 25φ extruder at a constant rate of 20g/min.
melt extruded. The extrusion temperature of the extruder is 190-210
℃, and the temperature of the die part was 200℃.

A stainless steel 60-mesh flat-stitch wire mesh was used as a concave-convex mouthpiece, and it was pulled at a speed of 4.9 m/min while blowing cooling air. At this time, a current of about 60 amperes was passed through the cap to generate Joule heat, thereby heating the cap. Further stretching
It was stretched 2.3 times at 6120°C.

The physical properties of the obtained fiber were as follows.

Average single yarn fineness: 6.5de Strength: 2.597de elongation
: 45% Deformation coefficient: 1.34 The deodorization rate of this m-fiber was as shown in Table 1.

Example 2 Fine zeolite particles (l Aniko) impregnated with ferrous sulfate and monoascorbic acid and having an average particle size of 10 μm were mixed with polyethylene wax (Tubatic LL MK-40) at a ratio of 6% by weight to the polymer as a dispersant. :
A fiber bundle was obtained in the same manner as in Example 1 using the same apparatus as in Example 1, using chips mixed with the fibers (manufactured by Mitsubishi Kasei ■) (stretching temperature: 90° C., stretching ratio: 1.5).

The physical properties of the obtained mM were as follows.

Average single yarn 1) Degree: 12 de Strength: 1 g/de elongation
: 34% Deformation coefficient: 1.45 The deodorization rate of this fiber was 80% with ammonia.

[Brief explanation of drawings]

FIG. 1 is an overall view of the apparatus used in Example 1. 1 Hopper 2 Feeder 3 Extruder 4 Gear pump 5 Cord for applied current 61 type dia Base 8 Plate for applied current 9 Transformer 10 Slide duck 1) Air nozzle 12 Take-up roller 13 m fiber bundle
14(a-d) Stretching bar 15 Stretching roller

Claims (4)

[Claims] (1) In a deodorizing fiber made by adding a deodorizing agent to the fiber, the deodorant is an inorganic solid fine particle adsorbed and impregnated with divalent iron ions and L-alcorbic acid, and the fiber is a thermoplastic polymer. A deodorizing fiber comprising: a deodorizing fiber having an average single filament fineness of 1 to 80 deniers. (2) 80 weight or more of the inorganic solid fine particles have an average particle size of 1 to 5
The deodorizing fiber according to claim (1), which has a particle size of 0 μm. (3) The deodorizing fiber according to claim 1 or 2, to which 1 to 40% by weight of deodorant is added to the fiber. (4) The cross-sectional shape of the fiber is non-circular and its irregularity coefficient (D
/d) is at least 1.1, the irregularity coefficient varies irregularly along the fiber axis direction, and the area of the cross section perpendicular to the fiber axis is irregular along the fiber axis direction. The deodorizing fiber according to any one of claims (1) to (3), which has changed to