JPH0959827A - Far infrared radiant composite fiber - Google Patents

Abstract

(57) [PROBLEMS] To provide a fiber containing far-infrared irradiating ceramic particles as a far-infrared radiating fiber, which has a high far-infrared radiating effect and which is less worn during yarn making and weaving processes. A far infrared ray emissivity has a wavelength of 4.5 to 30 μm.
In a composite fiber in which a thermoplastic polymer component containing particles exhibiting an average far-infrared characteristic of 65% or more in the region of 1 is arranged as one component, a) the composite fiber is a three-dimensional three-dimensional spiral winding A far-infrared radiative conjugate fiber characterized in that it has a crimped form, and b) the thermoplastic polymer component is located inside the three-dimensional three-dimensional spiral crimp while forming a part of the conjugate fiber surface.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a fiber emitting far infrared rays. More specifically, far-infrared radiation particles are exposed on the surface of the fiber to exert a far-infrared effect, and even when the fiber comes into contact with equipment or guides, it has excellent abrasion resistance, heat-retaining property of the woven or knitted fabric, and wind. The present invention relates to a far-infrared radiant conjugate fiber that can improve the adhesion.

[0002]

2. Description of the Related Art Conventionally, ceramics composed of alumina-based, zirconia-based, magnesium-based, or composites thereof emit far infrared rays, far infrared rays have a heat effect on the human body, and the human body is irradiated with far infrared rays. It is known that by doing so, a hyperemic action occurs inside the body, promotes blood circulation, and obtains medical effects and health promotion effects.

Further, it has been proposed to obtain a structure using a fiber which radiates far-infrared rays in a low temperature range of 20 to 50 ° C. and contains a radiator inside which a heat retaining effect of a human body is obtained. No. 63-126971. But,
If ceramics are exposed on the surface of the fiber mixed with far-infrared radiation ceramics, the equipment and guides that come into contact with the fiber in the fiber manufacturing process will be abraded by the ceramics with high hardness. Was hard and had a rough feeling, and there was a practical problem.

As a countermeasure against this, a method of coating a filament containing far-infrared radiation particles is disclosed in JP-A-63-2038.
Although proposed in Japanese Patent No. 73, there is a problem that far infrared rays are absorbed by the coating layer, and it cannot be said to be a sufficient countermeasure. A method of removing a part of the coating layer after forming the fiber structure is also proposed in JP-A-63-126971, but a special step is required to remove a part of the coating layer. It was not economically advantageous.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, in a fiber mixed with far-infrared radiation ceramics, the wear of equipment and guides due to the ceramic exposed on the fiber surface is reduced without impairing far-infrared radiation, and the texture of the fiber is improved. It is to provide an improved far-infrared radiation fiber.

[0006]

As a result of various studies to achieve the above object, the present inventors have found that the thermoplastic polymer component mixed with far-infrared emitting ceramic particles partially covers the fiber surface of the composite fiber. By forming the composite fiber and forming the composite fiber into a three-dimensional three-dimensional spiral crimp shape, the solution to the above-mentioned problem was reached.

That is, according to the present invention, the thermoplastic polymer component containing particles exhibiting far-infrared radiation characteristics in which the far-infrared radiation rate is in the range of 4.5 to 30 μm has an average of 65% or more. A) the composite fiber has a three-dimensional three-dimensional spiral crimp form, and b) the thermoplastic polymer component forms a part of the surface of the composite fiber, and the three-dimensional three-dimensional spiral It is a far-infrared radiation | emission composite fiber characterized by being located inside the crimp.

Far infrared radiation used in the present invention
Examples of ceramics include alumina (Al
₂O_Three) Type, magnesium (MgO) type, zirconia
(ZrO₂) System, titania (TiO₂) System, dioxide
Silicon (SiO₂), Chromium oxide (Cr ₂O_Three), Blow
Ito (Feo / Fe_ThreeO_Four), Spinel (MgO ・ Al
₂O_Three), Ceria (CeO₂), Beryllia (BeO), etc.
Can be raised. Such far infrared radiation ceramics
The far infrared emissivity is flat in the wavelength range of 4.5 to 30 μm.
It is necessary to have an average of 65% or more.

Further, it is desirable that the far-infrared emitting ceramics to be contained be finely pulverized to have a primary particle diameter of 5 μm or less, preferably 1 μm or less.
If it is less than 0.2 μm, the agglomeration is severe and the dispersion in the fiber becomes difficult, which is not practical. On the other hand, when it exceeds 5 μm, the spinnability is deteriorated and the fiber physical properties are deteriorated.

The thermoplastic polymer containing the far-infrared radiating particles is not particularly limited as long as it has a fiber-forming ability, but it may be, for example, polyethylene terephthalate or polybutylene depending on various characteristics of the finally obtained product. Polyesters such as terephthalate are particularly desirable.

The content of far-infrared emitting particles in the thermoplastic polymer is 3 to 30 wt%, preferably 5 to 15 w.
It must be t%. If the content is less than 3 wt%, the far infrared radiation effect is insufficient and satisfactory performance cannot be obtained.

On the other hand, if it exceeds 30 wt%, not only the drawability of the composite fiber is significantly deteriorated to make fiber formation difficult but also the physical properties of the fiber are deteriorated, which is not preferable.

The composite fiber referred to in the present invention is obtained by simultaneously extruding two or more kinds of polymers through the same die hole in the production of synthetic fibers, and the arrangement of the polymers is an eccentric core-sheath structure or a side-by-side structure. It is characterized in that a spiral three-dimensional crimp is developed by heat setting after spinning and drawing. When the position of the polymer is an eccentric core-sheath structure, the far-infrared emitting particles are mixed with the polymer at the core. At this time, it is preferable that the core part occupies 50% or less of the fiber surface and is a core-sheath structure composite fiber exposed on the surface. When the polymer is arranged in a side-by-side structure, far-infrared emitting particles are mixed in either one of them.

Further, a core-sheath structure in which the arrangement of the polymer is eccentric,
In both the side-by-side structure, the melt viscosity of the polymer containing the far-infrared emitting particles is set to 500 poises or more, preferably 1000 poises or more than that of the polymer not containing far-infrared emitting particles, and 3 by heat treatment after spinning / stretching. It is necessary to have a three-dimensional spiral crimp shape. At this time, the frequency of direct contact with the guides is reduced because the polymer containing the far-infrared emitting particles is inside the spiral due to the difference in heat shrinkage rate based on the difference in viscosity between the two components of the composite fiber, and the contact between fibers is also reduced. In this case, the wear frequency of the guides is remarkably reduced by decreasing the contact frequency of the ceramic-containing polymers, and the texture can be improved with the three-dimensional three-dimensional spiral crimp.
On the other hand, when the difference in melt viscosity between the two polymers is less than 500 poise, the crimp development is insufficient.

[0015]

INDUSTRIAL APPLICABILITY The far-infrared radiation composite fiber of the present invention has far-infrared radiation ceramic particles exposed on the fiber surface,
Not only does it exert far-infrared radiation effect, but because it is located inside the three-dimensional spiral crimp, the frequency of direct contact of the ceramic particles with the guides is reduced, which not only significantly reduces the wear of the guides. The texture of the woven or knitted material is significantly improved due to the three-dimensional three-dimensional spiral crimp.

[0016]

EXAMPLES The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[Examples and Comparative Examples] In the eccentric core-sheath structure composite fiber, polyethylene terephthalate having an intrinsic viscosity of 0.64 was used as the fiber forming polymer, and the core component was 2.6 mol of a metal sulfonate group. % Copolymerized polyester having an intrinsic viscosity of 0.45, and 1% zirconium silicate having an average particle size of 1.4 μm as far-infrared radiation particles.
5 wt% melt-blended, then fed to a core / sheath composite spinning device at a polymer temperature of 290 ° C. so that the discharge weight ratio was 50:50, spun from a spinneret with a hole diameter of 0.5 mm, and wound at a spinning speed of 700 m / min. It was

The unstretched yarn obtained was bundled into a denier of 4 million, stretched at a draw ratio of 3.5 times at 70 ° C. in warm water, then crimped, and heat set at 125 ° C. to obtain a fiber length. Was cut into 51 mm. The obtained raw cotton was spun to obtain a 40th count single yarn.

For comparison, as shown in the table, when a concentric core / sheath structure is used under the same spinning and drawing conditions, the content of far-infrared radiation particles is changed, and the polymer constituting the composite fiber is melted. The same spun yarn was obtained by changing the viscosity.

The spun yarn obtained is LAWSON-HEMP.
The abrasion resistance was evaluated using a yarn abrasion tester manufactured by ILL. The evaluation method is as follows.

A spun yarn knitting needle (KFPS46.58G1
It was passed through 2) and brought into contact with the hole of the knitting needle at an angle of 30 degrees and a tension of 20 g, and the wear state of the hole of the knitting needle after running for 1000 m was judged according to the following criteria. ⊚: No wear mark is seen or slight wear is observed to the extent that thread conduction can be seen. ◯: A wear mark is found only on the yarn entry side. Δ: A wear mark is seen on the yarn entry side, and slight wear is also seen on the exit side. X: A wear mark is clearly seen on the thread entry side and thread exit side.

The spun yarn obtained was used as a plain weave fabric and attached to the arm, and changes in skin temperature were measured.

The plain weave fabric thus obtained was touched by 10 testers and the texture was evaluated. At that time, it was evaluated according to the evaluation criteria of ◯: soft and good texture, △: a little bit of roughness, X: strong roughness, and the content that received the most evaluation among the evaluation results of 10 persons was the evaluation result of the sample. .

The results are shown together in Table 1.

[0025]

[Table 1]

Claims (5)

[Claims] 1. The far infrared emissivity has a wavelength of 4.5 to 30 μm.
In a composite fiber in which a thermoplastic polymer component containing particles exhibiting far-infrared radiation characteristics of which the average is 65% or more in the region of 1) is arranged as one component, a) the composite fiber has a three-dimensional three-dimensional spiral shape. A far-infrared radiative conjugate fiber characterized in that it takes a crimped form, and b) the thermoplastic polymer component is located inside the three-dimensional three-dimensional spiral crimp while forming a part of the surface of the conjugate fiber. . 2. The far-infrared radiative conjugate fiber according to claim 1, wherein the thermoplastic polymer component comprises a polyester polymer. 3. The content of far-infrared radiation particles is 3 to 30.
The far-infrared radiative conjugate fiber according to claim 1 or 2, which is in a weight percentage. 4. The far-infrared radiation composite fiber according to claim 1, wherein the conjugate fiber has an eccentric core-sheath structure, and the core portion containing far-infrared radiation particles occupies 50% or less of the fiber surface and is exposed. 5. The far-infrared radiation conjugating fiber according to claim 1, wherein the conjugate fiber has a side-by-side structure and contains far-infrared radiation particles in either one of them.