JPH05132833A - Heat storage thermal insulating fabric - Google Patents

Abstract

PURPOSE:To obtain the subject fabric useful for e.g. cold weather clothes giving excellent heat storage thermal insulation with a small amount of heat storage thermal insulating agent by using specific spun yarns with a specified amount of carbon black dispersed homogeneously therein. CONSTITUTION:The objective fabric is obtained by using spun yarns which are produced by mixed-spinning at a mixed-spinning rate of <=30% (pref. 3-30%) of man-made fiber with <=5wt.% (pref. 0.1-1wt.% of carbon black pref. <=2mum in particle diameter dispersed homogeneously therein with another kind of fibers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-retaining and heat-retaining cloth which is suitable for use in cold weather clothing, leisure clothing, interior goods such as carters and the like used in cold regions.

[0002]

2. Description of the Related Art Conventionally, JP-A-1-132816 discloses a heat storage heat-retaining fiber for selectively absorbing sunlight by incorporating carbide powder of a transition metal belonging to Group 4 of the periodic table or aluminum with the powder. It is disclosed.

[0003]

However, in order to obtain a practical heat storage and heat retention property with the above heat storage and heat retention fibers, it is necessary to contain a large amount of carbides, which reduces the physical properties of the yarn and leads to a guide in the manufacturing process. Etc.,
Alternatively, there has been a problem that a core-sheath type composite fiber containing a carbide in a core component must be formed in order to prevent damage to a guide or the like. The present invention solves the above-mentioned conventional problems and provides a heat storage heat retaining cloth that exhibits excellent heat storage heat retention properties with a small amount of heat storage heat retention agent.

[0004]

According to the present invention, an artificial fiber in which carbon black is uniformly dispersed at a content of 5% by weight or less is used as another fiber at a blending ratio of 30% by weight or less. A heat-storing and heat-retaining fabric, which is formed by using spun yarn that is mixed with.

The present invention will be described in more detail. The artificial fiber used in the present invention has a carbon black content of 5% by weight.
Below, it is preferably 0.1 to 1% by weight, and if it exceeds 5% by weight, the fiber performance is remarkably deteriorated, and fiber damage, fly, cotton drop, etc. in the spinning process rapidly increase, which is not preferable. In this case, it has been confirmed that even if the content of carbon black is 1% by weight or less, the heat storage heat retention performance is sufficiently maintained if the carbon black is uniformly dispersed in the fiber. ..

Therefore, depending on the color tone of the intended product, it is possible to deal with it by reducing the carbon black content, which is preferable from the viewpoint of improving the dyeing adaptability.

The method for producing artificial fibers containing carbon black may be a method for producing a general undiluted colored fiber, but it is important to uniformly disperse the carbon black in the fibers.
Depending on the particle size of the carbon black used, problems such as clogging of the spinning nozzle and uneven dispersion may occur, so it is desirable to use fine carbon black powder having an average particle size of 2 μm or less.

Another important requirement of the present invention is a card.
As for the blending ratio of fibers containing carbon black, as a result of diligent studies from the viewpoints of effectively exhibiting the heat retention effect and reducing the blackening of the fabric based on the carbon black containing fibers,
It has been found that even if the blending ratio is set to a low value of 30% or less, the heat storage and heat retaining effect is practically sufficient and the blackening of the fabric can be significantly reduced.

This fact shows that it is possible to widen the range of dyeing application by reducing the blending ratio of carbon black-containing fibers showing black color as much as possible.
Taking acrylic fiber as an example, when dyeing a cloth made of acrylic spun yarn in which carbon black-containing acrylic fiber is mixed at a ratio of 30% or less with a cationic dye, even if dyed with boiling water for 1 hour, the fiber It is possible to dye the blended white raw cotton portion under the same conditions as in ordinary dyeing without the bleeding of carbon black mixed in with, which is extremely desirable industrially.

[0010]

EXAMPLES Hereinafter, the present invention will be described more specifically by way of examples. The evaluation of the heat storage effect in the examples was performed by the following method.

[Evaluation method of heat storage effect] As a light source, it has a spectrum close to that of sunlight and has a color temperature of 5500 ° K.
(Reflection lamp for photography (5)
The temperature of the back surface of the sample was measured with a thermocouple in an atmosphere of 20 ° C. and 65% RH, and the heat storage effect was obtained by the difference in temperature rise from the cloth of the same standard containing no carbon black. evaluated.

(Example 1) Carbon black 3% by weight
Acrylic fiber 2dx51mm contained and normal acrylic fiber 2dx51mm were used.
A / 52 meter count spun yarn was formed, a plain knitted fabric was knitted by taking two 18 gauges, and the heat storage effect of each knitted fabric was evaluated. The evaluation results are shown in Table 1.

[0013]

[Table 1]

As is apparent from Table 1, the fabric (NO. 8) using the 10% black cotton mixed yarn has a heat storage effect of only 0.5 ° C., while the fiber containing 3% by weight of carbon black. Of a spun yarn in which only 3% by weight of
Even in O.6), the heat storage effect shows a high value of 3.5 ° C. Although the No. 1 fabric has an excellent heat storage effect, it has a difficulty in dyeing applicability because the black color is too strong.

(Example 2) Acrylic fiber 2d x 51 mm with various contents of carbon black and ordinary acrylic fiber 2d x 51 mm were used, and the blending ratio was variously changed to 1/52 meter count. No. 1 spun yarn was formed, and a plain knitted fabric was knitted by taking two 18 gauge pieces, and the heat storage effect of each knitted fabric was evaluated. The evaluation results are shown in Table 2.

[0016]

[Table 2]

From Table 2, the carbon black content is 0.
At 3% by weight, the blending ratio is as low as 5% by weight (NO. 1
Even with 5), it can be seen that an excellent heat storage effect of 3.5 ° C can be obtained.

(Example 3) Carbon black 3% by weight
Using various artificial fibers 2d × 51 mm contained and fibers not containing other carbon black, a blended spinning rate of 30% by weight was used to form a 1/52 meter count spun yarn.
The flat knitted fabric was knitted by taking two pieces of the fabric, and the heat storage effect of each knitted fabric was evaluated. The evaluation results are shown in Table 3.

[0019]

[Table 3]

From Table 3, it can be seen that the present invention can be effectively applied to various fibers other than acrylic fibers.

[0021]

According to the present invention configured as described above,
It has a remarkable effect that a small amount of heat storage and heat retaining agent exhibits excellent heat storage and heat retention properties, and that a fabric having no problem in dyeing adaptability can be obtained.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Toshihiko Shibata 4-chome, Sunadabashi, Higashi-ku, Nagoya, Aichi Prefecture 60-1 Mitsubishi Rayon Co., Ltd. Product Development Laboratory

Claims (2)

[Claims] 1. Carbon black contains 5% by weight in the interior.
A heat-storing and heat-retaining fabric, wherein artificial fibers that are uniformly dispersed in the following contents are formed by using spun yarn that is mixed with other fibers at a blending ratio of 30% by weight or less. 2. The content of carbon black contained in the artificial fiber is 0.1 to 1% by weight, and the blended ratio of the artificial fiber containing the carbon black is 3 to 30%. The heat storage heat retaining cloth according to claim 1, which is