JPH04289269A - Fibrous cloth with cool feeling - Google Patents

Abstract

PURPOSE:To obtain the title cloth rich in cool feeling with the air permeability of a specified level or higher by forming on the surface a heat-releasing layer capable of externally releasing the heat generating from the human body or by additionally forming on the back surface a sunlight-reflective layer. CONSTITUTION:The objective cloth can be obtained by using polyester fibers (or polyamide fibers etc.) produced by spinning after melt blending of a polyester (or polyamide etc.) with such material(s) as to be capable of externally releasing the heat generated from the human body and resistant to temperature rise due to sunlight irradiation (e.g. alumina, aluminum titanate, cordierite, beta-spodumene). Alternatively, the objective cloth can be obtained by imparting (A) a conventional cloth comprised of synthetic fibers such as polyester or polyamide fibers, semisynthetic fibers such as triacetate fibers, or natural fibers with (B) said material(s) by such means as vapor deposition, sputtering or printing a resin containing the material(s) to form a heat-releasing layer and/or sunlight- reflective layer. For the present cloth, the air-permeability is set at >=5cc/cm<2>muc.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a cooling fiber fabric that releases heat generated from the human body to the outside of clothing, and has an excellent cooling sensation that also has the ability to block sunlight and suppress the rise in temperature inside clothing. This invention relates to a cool-feeling fiber fabric.

0002

BACKGROUND OF THE INVENTION Various methods for producing fiber fabrics having a cooling sensation have been proposed. For example, there are methods that use highly absorbent fibers such as rayon and cotton on the skin side to release sweat generated from the human body to the outside of clothing, methods that use highly twisted yarn on the skin side to reduce the area that comes into contact with the human body, or Methods include using fibers with high thermal conductivity on the skin side or printing resin containing substances with high thermal conductivity on the back side of the fiber fabric to absorb body heat and release heat to the outside of the body. However, the above method does not provide an excellent cooling sensation, and although it is slightly effective in dissipating body heat, especially when using materials with high thermal conductivity, the temperature inside the clothes increases due to the absorption of sunlight. It had the disadvantage of

[0003] In addition, conventional methods for manufacturing cool-sensing fiber fabrics that block sunlight include methods that reflect sunlight by vapor-depositing aluminum on the surface of fiber fabrics, and methods that incorporate titanium oxide into fibers to absorb sunlight. A method of reflecting the visible light inside has been proposed. However, these methods have the problem that 100% of sunlight cannot be reflected, and that the partially absorbed light energy is converted into thermal energy, increasing the temperature inside the clothing.

0004

[Problems to be Solved by the Invention] The present invention was made in view of the current situation, and it is an object of the present invention to provide a cool-feeling fiber fabric that has the ability to release heat generated from the human body to the outside of clothing, and a fabric that can absorb sunlight. The purpose of the present invention is to obtain a cool-feeling fiber fabric that also has excellent cool-feeling properties.

[0005]

[Means for Solving the Problems] The present invention achieves the above object and has the following configuration. In other words, the first invention of the present application is "a cool-feeling fabric having a heat dissipating layer on the surface of the fabric that releases heat generated from the human body to the outside, and having an air permeability of 5 cc/cm2·sec or more. ``Fabric'' The second invention of the present application is ``a fiber fabric having a heat dissipation layer on the surface thereof that releases heat generated from the human body to the outside,
A fabric with a sunlight reflective layer on the back side and an air permeability of 5.
cc/cm2·sec or more.''

The present invention will be explained in detail below. The fiber fabrics used in the present invention include polyamide synthetic fibers such as nylon 6 and nylon 66, polyester synthetic fibers such as polyethylene terephthalate, polyacrylonitrile synthetic fibers, polyvinyl alcohol synthetic fibers, and triacetate synthetic fibers. Synthetic fibers, recycled fibers such as rayon, natural fibers such as cotton and linen, or nylon 6/
Examples include woven fabrics, knitted fabrics, and nonwoven fabrics made of blended fibers such as cotton and polyethylene terephthalate/cotton.

[0007] The features of the cool-feeling fiber fabric of the present invention are as follows.
The second feature is that the fiber fabric has a heat dissipation layer on its surface that radiates heat generated from the human body to the outside of the clothing. The heat dissipation layer referred to here radiates heat (wavelength around 10 μm) generated from the human body,
The layer also contains a substance that is difficult to heat up due to sunlight irradiation. Materials with the above characteristics include alumina, aluminum titanate, cordierite,
Examples include β-spodium.

A second feature of the cool-feeling fiber fabric of the present invention is that it has an air permeability of 5 cc/cm 2 ·sec or more. When the air permeability is less than 5 cc/cm2·sec, sweat generated from the human body cannot be released to the outside of the clothing, resulting in a feeling of stuffiness. This air permeability is 5cc/cm2・s
ec or more is required, but 15cc/cm2 ・sec
With the above, you will be able to get the ideal cool feeling. In order to make the cool-feeling fiber fabric have an air permeability of 5 cc/cm2 ・sec or more, it is sufficient to control the density of the fiber fabric, and in general, the woven density, knitting density, and non-woven fabric density are adjusted depending on the fineness of the fibers used. The degree of fiber entanglement, etc. may be adjusted by a known method, and is not particularly limited in the present invention.

Furthermore, the cool feeling fiber fabric of the second invention of the present application is characterized in that it has a sunlight reflecting layer on the back side of the fiber fabric. The sunlight reflecting layer herein is a layer containing a substance that has the property of reflecting near-infrared rays in the range of at least 0.78 to 3 μm among the wavelengths included in sunlight. Examples of substances that reflect near-infrared rays include aluminum, stainless steel, gold, silver, indium tin oxide, and zinc sulfide.

[0010] In order to form the above-mentioned heat dissipation layer and sunlight reflection layer on the front and back surfaces of the fiber fabric, respectively, a vapor deposition method, a sputtering method, a method of printing a resin containing the above-mentioned substances, or a method of printing a resin containing the above-mentioned substances, or a method of printing a resin containing the above-mentioned substances, or using a polymer such as polyamide or polyester can be used. This may be carried out using a known method such as a method of forming a fabric using threads obtained by melt-mixing the above-mentioned substances and spinning the mixture. The thickness of each layer and the content of the substance to be included when forming the heat dissipating layer and the sunlight reflecting layer on the front and back surfaces of the fiber fabric, respectively, may be appropriately determined depending on the required performance and are not particularly limited.

[0011] Furthermore, when a heat dissipation layer is formed on the surface of a fabric such as a woven or knitted fabric using a thread made by melt-mixing the above-mentioned heat dissipation substance and a polymer such as polyamide or polyester, a part of the heat dissipation layer is formed on the surface of the fiber fabric. It may exist on the back side, but in this case,
The heat dissipation layer present on the back surface of the fiber fabric is desirably 30% or less of the back surface area of the fiber fabric.

The present invention has the above-described structure, and according to the present invention, a fiber fabric having excellent cooling sensation can be obtained.

[0013]

[Function] The present inventors believe that the reason why the cool-feeling fiber fabric of the present invention has a high level of coolness is as follows.

When a heat dissipation layer is formed on the surface of the fiber fabric as in the cool feeling fiber fabric of the present invention, the heat generated from the human body is absorbed by the fiber fabric and transferred to the heat dissipation layer, and then the heat dissipation material is used to transfer the heat to the clothing. released outside. Moreover, when the air permeability is set to 5 cc/cm2・sec or more like the cool-feeling fiber fabric of the present invention, it also has the effect of removing sweat and heat generated from the human body to the outside of the clothing, which has the same effect as the above-mentioned heat dissipation effect. The synergistic effect results in superior cooling sensation.

[0015] Furthermore, if a sunlight reflecting layer is formed on the back side of the fiber fabric, the intensity of sunlight irradiated on the sunlight reflecting surface of the fabric with a sunlight reflecting substance applied to the surface of the fabric can be reduced by 1. In this case, the intensity of sunlight irradiated on the sunlight reflecting layer of the cool-feeling fiber fabric of the present invention becomes as small as 0.05 to 0.4 because the sunlight is absorbed by the surface of the fiber fabric. , when comparing the case where a substance with the same reflectance is formed on the surface of the fiber fabric and the case where it is formed on the back side of the fiber fabric, the amount of sunlight energy that should be reflected is Even if some of the sunlight is absorbed, the amount converted to heat energy is much smaller when it is formed on the back side of the fiber fabric, so the amount of sunlight absorbed is much smaller. A fabric having a light-reflecting layer on its back side has an excellent cooling sensation, and due to the synergistic effect of the above-mentioned heat dissipation effect and sunlight reflection effect, it exhibits an excellent cooling sensation.

[0016]

[Examples] The present invention will be explained in more detail below with reference to Examples. The performance of the fiber fabrics in the Examples was measured and evaluated by the following method. (1) Heat dissipation Place the sample on a hot plate kept at 50°C in a constant temperature and humidity room with a temperature of 30°C and a humidity of 60% so that the back side of the fiber fabric overlaps, and check the surface of the fiber fabric after leaving it for 10 minutes. The temperature was measured with a thermoviewer (infrared sensor manufactured by JEOL Ltd.).

(2) Light shielding A temperature measuring device as shown in the side sectional view in Fig. 1 was installed in a constant temperature and humidity room with a temperature of 30°C and a humidity of 60%, and a 100W photographic power source with a center wavelength of 1 μm was used as an energy source. Using white light source 1, when white light was irradiated for 10 minutes on the surface of fiber fabric 2 to be measured located at a position of 60 cm from light source 1, the surface of fiber fabric 2 to be measured was located at a position 5 mm away from the back surface of fabric 2 and in front of black polyester fabric 4. The temperature was measured by a temperature sensor 3 located in the fiber fabric 2, and the light shielding property of the fiber fabric 2 was evaluated. (3) Air permeability According to JIS L-1018.

Example 1 First, both warp and weft were made of polyester fiber 75d/36f.
A plain woven fabric (taffeta) with a warp density of 110 threads/inch and a weft thread density of 80 threads/inch is prepared, and after scouring, drying, and presetting in the usual manner, it is dyed with an optical brightener. Next, I performed an intermediate set. Next, a heat dissipating substance-containing resin of the following formulation 1 was printed on the surface of the above fiber fabric using a flat screen (checkered pattern, porosity 40%), dried and finished setting to obtain a cool feeling fiber fabric of the present invention. Ta.

[Formulation 1] Aluminum titanate
10 parts by weight
(Manufactured by Osaka Cement Co., Ltd., heat dissipating material) DEX
CEL CLEAR 5100
84 parts by weight (manufactured by Dainippon Ink & Chemicals Co., Ltd., printing binder) Water

5 parts by weight
DEXCEL AGENT 2K
1 part by weight (manufactured by Dainippon Ink & Chemicals Co., Ltd., crosslinking agent for binder)

002
For comparison with the present invention, a comparative fiber fabric (referred to as Comparative Example 1) was obtained using the same method as in this example except that the step of printing the heat dissipating material was omitted. In addition, a comparative fiber fabric (Comparative Example 2
) was obtained.

The performance of the fiber fabrics of the present invention and comparative fiber fabrics obtained as described above was measured, and the results are shown in Table 1.

[0022]

[Table 1]

As is clear from Table 1, the fiber fabric of the present invention has high heat dissipation and excellent cooling sensation while having light shielding properties equivalent to those of the fabric of the comparative example.

Examples 2 to 3 Relative values measured at 25°C at a concentration of 0.5 g/100 ml in a solvent of phenol/tetrachloroethane (1/1) and 5 parts by weight of alumina with an average particle size of 0.8 μm as a heat dissipating substance. A composition obtained by melt-mixing 95 parts by weight of polyethylene terephthalate having a viscosity ηrel of 1.30 was heated at a spinning temperature of 260
℃, drawn at a speed of 3000 m/min, followed by stretching temperature 120 ℃, stretching ratio 1.5 times, heat treatment temperature 160
The yarn was drawn and heat treated at ℃ to obtain multifilament yarn A having a fineness of 75d/36f.

Next, as a solar reflecting material, an average particle size of 1
5 parts by weight of zinc sulfide in μm and relative viscosity ηrel 1.30
A composition obtained by melt-mixing 95 parts by weight of polyethylene terephthalate was taken at a spinning temperature of 260°C and a speed of 3000 m/min, and then stretched at a stretching temperature of 120°C, a stretching ratio of 1.5 times, and a heat treatment temperature of 160°C. A multifilament yarn B having a fineness of 75d/36f was obtained by heat treatment.

Here, a JIL-7 type double knit machine (manufactured by Fukuhara Seiki Co., Ltd.; pot diameter 30 inches, 22 gauge, 56 feeder) was used, and the 1st F (feeder) and 2nd F , 4th F and 5th F have a fineness of 75d/
A tack reversible knitted fabric was knitted by supplying 36 f of regular polyester multifilament yarn and multifilament yarn A to the 3rd and 6th F, respectively.

[0027] Also, the multifilament yarn B is supplied to the 1st and 4th F, and the same fineness of 7 is supplied to the 2nd and 5th F.
A tack reversible knitted fabric was knitted by supplying regular polyester multifilament yarns of 5d/36f and multifilament yarn A to the 3rd F and 6th F, respectively.

The knitted fabric obtained as described above is opened, scoured, dried, and preset in the usual manner, and then dyed with a fluorescent brightener and finished set, so that the surface of the fiber fabric is coated. A cool feeling fiber fabric of the present invention having a heat dissipation layer (referred to as Example 2) and a cool feel fiber fabric of the present invention having a heat dissipation layer on the surface of the fiber fabric and a sunlight reflecting layer on the back side of the fiber fabric (Example 2) 3) was obtained.

For comparison with the present invention, when knitting a tactile reversible fabric in Example 2, the method was exactly the same as in Example 2, except that the multifilament yarns supplied to each feeder were changed as shown in Table 2. Five comparative fiber fabrics (referred to as Comparative Examples 3 to 7, respectively) were obtained.

[0030]

[Table 2]

The performance of the fiber fabrics of the present invention and comparative fiber fabrics obtained as described above was measured, and the results are shown in Table 3.

[0032]

[Table 3]

As is clear from Table 3, the fiber fabric according to Example 2 of the present invention has high heat dissipation and excellent cooling sensation while having light shielding properties equivalent to those of the comparative fabric. I understand. Furthermore, when the back side of the fabric is provided with a sunlight reflecting layer, as in the fiber fabric of Example 3, it has higher heat dissipation and lower light shielding properties than the fabric of the comparative example, and has an excellent cooling sensation. I know what you're doing.

Example 4 First, both warp and weft were made of polyester fiber 75d/36f.
A plain woven fabric (taffeta) with a warp density of 110 threads/inch and a weft thread density of 80 threads/inch is prepared, and after scouring, drying, and presetting in the usual manner, it is dyed gray with a disperse dye. Next, I performed an intermediate set.

[0035] Next, using aluminum as a sunlight reflecting substance, aluminum was heated and evaporated in a vacuum using a vacuum evaporation apparatus, and aluminum was directly evaporated to a thickness of 500 Å on the back surface of the fiber fabric.

Furthermore, a heat dissipating substance-containing resin of the following formulation 1 was printed on the surface of the above fiber fabric using a flat screen (checkered pattern, porosity 40%), dried, and finished setting to obtain a cool feeling fiber fabric of the present invention. I got it.

[Formulation 1] Aluminum titanate
10 parts by weight
(Manufactured by Osaka Cement Co., Ltd., heat dissipating material) DEX
CEL CLEAR 5100
84 parts by weight (manufactured by Dainippon Ink & Chemicals Co., Ltd.) Water

5 parts by weight DEXCEL AGE
NT 2K 1
Parts by weight (manufactured by Dainippon Ink and Chemicals Co., Ltd.)

For comparison with the present invention, a comparative fiber fabric (Comparative Example 8 ) was obtained.

In addition, in this example, aluminum was deposited on the front surface of the fiber cloth instead of the back surface of the fiber cloth, and a heat dissipating substance was printed on the back surface of the fiber cloth instead of the front surface of the fiber cloth. A comparative fiber fabric (referred to as Comparative Example 9) was obtained in exactly the same manner as in the example.

The performance of the fiber fabrics of the present invention and comparative fiber fabrics obtained as described above was measured, and the results are shown in Table 4.

[0041]

[Table 4]

As is clear from Table 3, the fiber fabric of the present invention has excellent cooling sensation.

[0043]

[Effects of the Invention] According to the present invention, a fiber fabric with good cooling sensation can be obtained.

[Brief explanation of the drawing]

FIG. 1 shows an example of a knitting diagram used for manufacturing the cool-feeling fiber fabric of the present invention.

FIG. 2 is a side sectional view of a main part of an apparatus for evaluating the light shielding properties of the cool-feeling fiber fabric of the present invention.

[Explanation of symbols]

1 100W white light source for photography 2 Fiber fabric of the present invention 3 Temperature sensor 4 Black dyed polyester fabric (both warp and weft 7
5d/36f, warp density 110/inch, weft density 8
0 pieces/inch) 5 20mm thick polystyrene foam

Claims (2)

[Claims] 1. A cool-feeling textile fabric, which has a heat dissipation layer on its surface that releases heat generated from the human body to the outside, and has an air permeability of 5 cc/cm 2 ·sec or more. [Claim 2] A fabric having a heat dissipation layer on the surface of the fiber fabric to release heat generated from the human body to the outside, and a sunlight reflecting layer on the back side, the fabric having an air permeability of 5 cc/cm2·sec.
A cool-feeling fiber fabric characterized by the above.