JPH03124841A - Synthetic fiber woven fabric and its production - Google Patents

Abstract

PURPOSE:To obtain a woven fabric of synthetic fiber in which carbon black synthetic fiber is shield by ultrafine fiber by weaving a specific fibrillation type composite fiber and specific carbon black-containing synthetic fiber each using the composite fiber and synthetic fiber as warp and weft and fibrillating the composite fiber. CONSTITUTION:A fibrillating composite fiber consisting of polyester or polyolefin and polyamide in which cross section the polyester or polyolefin component B is divided into plural numbers by the polyamide component A and a synthetic fiber consisting of polyamide or polyester and containing 0.5-20% carbon black are woven each using the composite fiber and synthetic fiber as warp and weft and the resultant composite fiber is fibrillated by shrinking the polyamide component of the composite fiber by a swelling agent to provide the synthetic fiber woven fabric in which an ultrafine fiber 2 is positioned on the surface of woven fabric and the carbon black-containing synthetic fiber 1 is shielded by the ultrafine fiber 2, capable of shielding solar light, etc., without transmitting heat to the reverse side, having excellent moisture permeability and suitable for curtain, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to synthetic fabrics. More specifically, the present invention relates to a synthetic fabric that blocks sunlight and heat rays and does not allow heat to pass through the back side.

(Problems to be solved by conventional techniques and inventions) For people with spinal cord injuries who are unable to regulate their body temperature, when they are exposed to sunlight or heat rays, their body temperature rises without being able to regulate their body temperature, which is unfortunate. In some cases, it can even lead to death.

For people with this kind of constitution, blocking sunlight and heat rays,
Furthermore, there is a desire for clothing that can release heat within the clothing to the outside of the clothing.

Aluminum vapor deposition is an example of a method for reflecting sunlight, heat rays, etc. on the surface. However, when using aluminum vapor deposition to reflect sunlight, the heat generated from the body is also reflected back toward the body, trapping the heat inside the clothes, which has the disadvantage of increasing the temperature inside the clothes.

So-called moisture-permeable waterproof fabrics, which have micropores that allow water vapor particles to pass through but do not allow water droplets to pass through, can allow some of the heat inside the clothing to escape to the outside, but they do not reflect the infrared rays of the sun's rays. Can not. Furthermore, even if the fabric has a high degree of whitening, it cannot help but reflect the sunlight at a low rate.

JP-A No. 63-21138 relates to an antistatic fabric, in which carbon black is used as a conductive component, and the outside of the yarn containing the conductive component is wound with a crimped yarn, so that black carbon is formed from the surface of the fabric. It is disclosed that black is prevented from being exposed.

(Means for Solving the Problems) The present inventors have arrived at the present invention as a result of intensive research in order to improve the above-mentioned drawbacks.

That is, the synthetic fiber fabric of the present invention contains 0.6 carbon black.
It is a woven fabric that uses synthetic m pongee containing ~20% of synthetic m pongee in one of the warp or weft and a synthetic m pongee made of ultrafine A11 in the other, and as shown in Figure 1, the ultrafine fibers are located on the surface of the fabric structure. , a synthetic fiber fabric characterized in that synthetic fibers containing carbon black are shielded.

In addition, the manufacturing method includes fibrillated composite fibers made of polyester and polyamide or polyolefin and polyamide, in which the polyamide component is divided into a plurality of polyester or polyolefin components in the all cross section, and carbon black. After forming a synthetic fiber fabric using polyamide or polyester containing 0.5 to 20 μm, the polyamide is shrunk with a swelling agent to fibrillate the composite fiber, and ultrafine millimeters of polyester or polyolefin are placed on the surface layer of the fabric. It is characterized by

Hereinafter, the constituent elements of the present invention will be explained in detail.

Examples of synthetic fibers containing carbon black include polyamide, polyester, acrylic, polyolefin, etc., and polyamide and polyester are preferable for use in clothing.

The viscosity of carbon black is not particularly limited, but it is suitable to be as fine as 0.6 μm without impairing spinnability.
The following particle sizes are preferred: Further, the content of carbon black is 0.5 to 20% by weight, preferably 1 to 1% by weight.
It is 5%. If it exceeds 20% by weight, the spinnability tends to be poor (if it is less than 0.6% by weight, the infrared absorption effect decreases).

Synthetic fibers containing carbon black are used for either the warp or the weft, and synthetic fibers made of ultrafine fibers are used for the other. Here, the ultrafine fiber refers to mm with a fineness of 0.6 denier or less, and 0.6 denier or less. It is preferable that the denier is less than or equal to s denier.

As shown in FIG.
is shielded.

Next, a method for manufacturing the synthetic fiber fabric of the present invention will be described.

First, a woven fabric is formed using boria or polyester containing 0.5 to 20% of carbon black and fibrillated composite fibers. Polyamide, polyester, etc. , acrylic, and polyolefin, but polyamide, polyester, and polyolefin are preferable because they can be melt-spun. As the polyamide, nylon 6, nylon 66, nylon 11, nylon 12, and copolymers thereof can be used, but nylon 6 is preferable from the viewpoint of shrinkability by drugs, which will be described later.

Polyesters include polyethylene terephthalate, polybutylene terephthalate, and isophthalic acid,
Copolymers of adipic acid, trimethylene glycol, polyethylene glycol, etc. can be used, but ethylene terephthalate is preferred. Examples of the polyolefin include polyethylene, polypropylene, and polystyrene, and polypropylene is preferred from the viewpoint of composite spinnability.

The shape of the fibril upper type composite 1 m set is a composite yarn in which the polyamide component is divided into a plurality of polyester or polyolefin components in the I fiber restoration cross section, for example, a cross section as shown in FIGS. 2 to 5. An example of a shaped composite fiber is as shown in Figures 2 and 3, where there are four or more radially extending parts (4) from the center of the cross section of the fiber, and four or more fan-shaped parts that complement the parts (4). A composite yarn consisting of a portion (B) in which the radial portion is made of polyamide is more preferable.

As a method for obtaining Gokuma pongee from these composite yarns, it can be carried out by the method described in Japanese Patent Publication No. 6l-37i$8a, in which the composite yarn is divided, and at this time the polyamide component shrinks and the polyester component Alternatively, the polyolefin component is located on the surface of the ultrafine multifilament. Composite yarns such as those shown in FIGS. 2 to S are prepared by using a chemical that moistens the radial portion of the polyamide component, such as benzyl alcohol, phenylethyl alcohol, phenol, cresol, formic acid, acetic acid and their solutions, emulsion, etc. It is divided into ultrafine threads, and at the same time, the polyamide component shrinks in the fiber axis direction. The magnitude of this shrinkage increases as the polyamide segment becomes larger.

At this time, the ultrafine polyester or polyolefin I filament floats to the surface layer of the ultrafine multifilament, increasing its bulk.

Even when weaving using the composite yarn for either the weft or the warp,
The other carponplec-containing synthesis! Because it is an IM, the color of the fabric is blackish. However, when this woven fabric is treated with a splitting agent for the composite yarn, the carbon black-containing synthetic fibers sink into the woven fabric as shown in Figure 1 due to the ultra-fine and bulky filaments, resulting in black The dark color becomes white.

As a result, the two effects of light reflection by the white aM on the surface and infrared absorption by the carbon black-containing synthetic fibers inside the cloth combine to increase the effect of blocking heat rays. or,
Although the woven fabric becomes denser, it maintains moisture permeability and resists heat and
Water vapor transmission is possible.

(Example) Hereinafter, it will be explained in more detail with reference to Examples.

Example 1. Comparative Examples 2 to 3 Typical polyethylene phthalate without titanium oxide (
(hereinafter abbreviated as PET) was mixed with 296 carbon blacks having an average particle size of 0.2 μm, and the carbon-mixed PET was spun by a normal melt spinning method and drawn to obtain H1Od/80f drawn filament F1.

In addition, polypropylene (hereinafter abbreviated as PP) and nylon 6 were used to make a composite yarn having a cross section as shown in FIG. component) and PF (component B in Figure 3) at a composite ratio of 1:2, and then spun and drawn to create a 100d/60f composite filament! I got the point.

Furthermore, for comparison, ordinary P containing 0.6% titanium oxide
ET is spun and drawn using a normal melt spinning method to form 100 d1
A white drawn filament FA of 50 f was obtained.

Fl on the warp, F on the weft! Gray plain fabric W1 using
(Example 1), black fabric W using both warp and weft F1! (Comparative Example 1), both warp and weft! A white fabric Wi (Comparative Example 2) using No. 1 was created.

All were woven at a warp/weft density of 30 threads/1 nch.

Wl is 1 in 10% benzyl alcohol aqueous emulsion
After soaking for 5 minutes, it was squeezed with a mangle and washed with 80°C water. The weft composite filament 1 is divided to form a plain woven fabric W
The color of No. 1 changed from gray to extremely pale gray. The heat ray blocking properties of the treated plain fabrics W1, Wl, and Wl were evaluated.

In addition, as a method for evaluating heat ray blocking properties, the following measurements were performed. That is, a cloth was held 50 cm below an infrared lamp of <100V-515W as shown in FIG. 6, and the surface temperature of the back side of the cloth and the ambient temperature 1 cm below the cloth were measured after irradiation with the lamp for 5 minutes. At this time, the room temperature was controlled to be 30°C.

The results are shown in Table 1. From the above, the synthetic fiber fabric of the present invention is
It can be seen that it is highly effective in blocking heat rays.

w41 Table Examples 2-1. Comparative Example S Polyethylene terephthalate (hereinafter referred to as copolymerized PE) obtained by combining polyethylene glycol (molecular weight 60G) with 5xm
A master chip was prepared by adding 25 times of carbon black having an average particle size of 0.2 μm to T). The master chip was mixed with a regular PET chip and melt-spun and drawn to obtain a 76d156f filament. At this time, the mixing ratio of the master chip and the normal PET chip was set to 1:1.
19.1 :411:18.1:8,1:4.1:1,
7111 filament F4~Fto as 4:1
And so.

However, the spinning and drawing properties of Fe11 were slightly poor as single thread breakage occurred.

On the other hand, using the cap shown in Japanese Patent Publication No. 411-111129, as shown in Fig. 3, the h1! Composite yarn with an R surface is made of nylon 6 (component in Figure 5) and regular PET (B in Figure 5).
component) at a composite ratio of 1:2, and then spun and stretched for 100 d.
A drawn composite filament F blind line of 150 f was prepared.

Plain woven fabrics W4 to WIO were woven using filaments F4 to F1o as warp threads and composite filament Fzt as weft threads. Weaving density is 80 warp/1nch, weft 80/1nch
And so. Each of the plain woven fabrics W4 to Wl11 was immersed in 10-benzyl alcohol aqueous emulsion W for 16 minutes at room temperature, washed with 1,50"C water squeezed with a mangle, and dried. The warp threads were completely covered by the PET filaments, and the color was very light gray.

The heat ray blocking properties of the treated plain woven fabrics W4 to W+o were evaluated in the same manner as in Example 1, and the results are shown in Table 2.

From the above results, the content of carbon black (effects of the invention) Since the fabric of the present invention is white on the surface, it reflects light and heat rays, and the interior of the fabric absorbs the transmitted heat rays.

In addition, although the structure is dense, it also has excellent breathability. Therefore, it can be used not only as a heat ray blocking cloth for materials such as curtains and sun blinds, but also as clothing such as daytime work clothes.

[Brief explanation of drawings]

FIG. 1 is an enlarged view of the structure of the synthetic fiber fabric of the present invention,
Figures 2 to 6 show examples of fibrillated composite fibers used in the warp or weft of the composite fabric of the present invention. FIG. 6 shows an apparatus for measuring the heat ray shielding effect. (1)...Carbon-containing yarn, cutting)...τ extra fine si#1
, (3)...Infrared lamp, (4)...Gantou,
(6)...power supply, (8)...sample cloth, (
7) Cloth holder (temperature sensor)
4)...Polyamide component, ■)...Polyester component or polyolefin component. Drawing il! No changes to FC contents Figure 1 Figure 9 Figure 10 Figure 11 Figure 6 Figure 6 01 02 Hand 3 11 Reprint (self-motivated) December 8, 1999

Claims (2)

[Claims] (1) A woven fabric that uses synthetic fibers containing 0.5 to 20% carbon black in one of the warp or weft and synthetic fibers made of ultrafine fibers in the other, and the ultrafine fibers are located on the surface of the fabric structure. , a synthetic fiber fabric characterized in that synthetic fibers containing carbon black are shielded. (2) Fibrillated composite fibers made of polyester and polyamide or polyolefin and polyamide, in which the polyamide component divides the polyester or polyolefin component into multiple pieces in the fiber cross section, and carbon black from 0.5 to After forming a synthetic fiber fabric using polyamide or polyester containing 20%, the polyamide is shrunk with a swelling agent, the composite fiber is fibrillated, and the polyester or polyolefin ultrafine fiber is placed in the surface layer of the fabric. A manufacturing method for synthetic fiber fabrics.