JP3071938B2 - Cool feeling fiber cloth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber cloth which blocks sunlight even when worn in the middle of summer and has an excellent cool feeling.

[0002]

2. Description of the Related Art Various methods for producing fiber fabrics having a cool feeling have been proposed. For example, a method of using a high water-absorbent fiber such as rayon or cotton on the skin side to release sweat generated from the human body to the outside of the clothes, a method of using a high twist yarn on the skin side to reduce the contact area with the human body, or There is a method in which fibers having high thermal conductivity are used on the skin side, or a resin containing a substance having high thermal conductivity is printed on the back surface of the fiber cloth to remove body heat and escape the body. However, the reason for feeling the heat in the midsummer is a large factor due to the effect of increasing the temperature of clothes and the human body, which absorbs sunlight and raises the temperature, so that the above method cannot provide excellent coolness.

[0003] In order to solve the above-mentioned problems, a method of reflecting aluminum by evaporating aluminum on the surface of a fiber fabric and a method of kneading titanium oxide into fibers to reflect visible light in sunlight have conventionally been used. Etc. have been proposed. However, in the former method, since the fiber surface is uneven, even if aluminum is deposited, there is a problem that sunlight is diffusely reflected and the temperature of clothes and the temperature in clothes rise.
Also, in the latter method, since the titanium oxide has a strong hiding power, the transmittance of the fiber fabric to sunlight decreases, and the rise in the temperature in clothes can be suppressed, but the titanium oxide itself absorbs the sunlight. There is a problem that the temperature of the clothes rises because the heat is converted into heat energy.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has been developed to provide a fiber cloth having an excellent cool feeling and having a small rise in the temperature of clothes and the temperature in clothes due to sunlight. The purpose is to obtain.

[0005]

The present invention attains the above object and has the following constitution. That is, the present invention provides a cooling sensation characterized by having a sunlight reflecting layer on the back surface of a fiber fabric composed of fibers containing at least one type of ceramic fine particles of alkali metal titanate or alkaline earth metal titanate. Fabric having
It is the gist. Hereinafter, the present invention will be described in detail.

The alkali metal titanate or alkaline earth metal titanate used in the present invention may be a fibrous or plate-like material obtained by firing titanium oxide and an alkali metal carbonate or an alkaline earth metal carbonate at about 1000 ° C. The composite ceramic has the form of Li ₂ Ti ₆ O ₁₃ , Na ₂ Ti ₄ O ₉ , Na ₂ Ti ₆ O ₁₃ , K ₂
Ti ₂ O ₅ , K ₂ Ti ₈ O ₁₇ , Rb ₂ Ti ₆ O ₁₃ , Cs ₂ Ti ₄ O ₉ , Fr ₂ Ti ₆ O ₁₃
And alkaline earth metal titanates such as CaTi
_{O 3, SrTiO 3, BaTiO 3} , BeTiO 3, MgTiO 3 , and the like.
In the present invention, these ceramics are used alone or in combination of two or more.

The particle size of the fibrous or plate-shaped ceramic fine particles used in the present invention is preferably 50 μm or less, more preferably 20 μm or less in the length direction, preferably 5 μm or less, more preferably 1 μm or less in the thickness direction.
Generally, when spherical or amorphous fine particles are contained in the fiber, the particle size is preferably 10 μm or less, and more preferably 1 μm or less. Since it is easy to arrange in the direction, the particle size may be relatively large compared to spherical or amorphous fine particles. However, if the particle size of the ceramic fine particles exceeds the above range, clogging or thread breakage in the filter medium in the yarn-making process may occur. However, even if the spinning can be performed, the problem of yarn breakage in the drawing process occurs, which is not preferable.

The fibers in the present invention include nylon,
Examples include synthetic fibers such as polyester, acrylic, and vinylon, recycled fibers such as rayon, and semi-synthetic fibers such as acetate.

The content of the ceramic fine particles is suitably from 0.1% by weight to 20% by weight, preferably from 1% by weight to 10% by weight based on the weight of the fiber. When the content of the ceramic fine particles is less than 0.1% by weight,
If the desired cooling sensation is not obtained and exceeds 20% by weight, not only the effect of cooling sensation reaches saturation, but also the productivity of fibers deteriorates, and a sufficient elongation is obtained in terms of yarn quality. I can't.

As a method of incorporating the ceramic fine particles into the fiber, a method of directly mixing and spinning the raw material polymer, a method of manufacturing a master batch in which a part of the raw material polymer is previously incorporated at a high concentration, and applying this at the time of spinning. And then spinning.

The fiber containing the ceramic fine particles used in the present invention can be produced by a known melt spinning method, dry spinning method, or wet spinning method. The fiber containing the ceramic fine particles can be used alone or for any purpose. If necessary, it is used by mixing with other fibers and processed into a fiber fabric such as a woven fabric, a knitted fabric, or a non-woven fabric.

The cooling fiber fabric of the present invention has a solar reflective layer on the back surface of the above-mentioned fiber fabric. , A layer formed of a material having a property of reflecting near-infrared light having a wavelength of at least 0.78 to 3 μm. Examples of the substance having the property of reflecting near-infrared rays include aluminum, stainless steel, gold, silver, copper, SnO ₂ , and In ₂ O ₃ .

In order to form the sunlight reflecting layer on the back surface of the fiber cloth, for example, the above-mentioned near-infrared reflecting material may be attached to the back surface of the fiber cloth by a known method such as a printing method, a vapor deposition method, and a sputtering method. . The amount and thickness of the solar reflective layer when the solar reflective layer is formed on the back surface of the fiber cloth vary depending on the forming method, and thus are not particularly limited.

In order to further increase the reflectance of the solar reflective layer in the near-infrared wavelength region, the fiber cloth before forming the solar reflective layer is calendered in advance, and the back surface of the fiber cloth is flattened. It is preferable to keep it. The present invention has the above configuration, and according to the present invention, a fiber fabric having excellent cool feeling can be obtained.

[0015]

[Work] The present inventors consider the reason why the fiber fabric of the present invention has a high degree of cool feeling as follows. The fiber fabric having cool sensation of the present invention is made of a fiber containing ceramic fine particles made of alkali metal titanate or alkaline earth metal titanate inside the fiber, and the present ceramic has a hiding power. And has the property of reflecting visible light and near infrared rays in sunlight.

Titanium oxide, zinc sulfide and the like have been conventionally used as the substance having the above properties. Titanium oxide and zinc sulfide are amorphous particles. As a result of irregular reflection of visible light or near-infrared light and heating of the fiber itself, excellent cooling sensation cannot be obtained. When these particles are contained in fibers, the length of the ceramic fine particles is aligned with the yarn direction of the fibers, so that the diffuse reflection of sunlight is small and the reflection performance of the ceramic itself is impaired. As a result, a high degree of coolness is exhibited.

If a solar reflective layer is formed on the back surface of a fiber cloth made of such fibers, the near-infrared reflective substance is formed on the surface of the fiber cloth. Assuming that the light intensity is 1, the intensity of sunlight applied to the sunlight reflecting layer of the cool feeling fiber fabric of the present invention is 0.05 to 0.05 because sunlight is absorbed on the surface of the fiber fabric.
0.4. Therefore, comparing the case where a substance having the same reflectance is formed on the front surface of the fiber cloth and the case where it is formed on the back surface of the fiber cloth, the amount of sunlight energy to be reflected is formed on the back surface of the fiber cloth. Is much smaller, and even if part of the sunlight is absorbed, the amount converted to heat energy is much smaller when it is formed on the back of the fiber fabric. It is considered that the fabric having the solar reflective layer on the back has excellent coolness.

[0018]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. The measurement and evaluation of the performance of the fiber cloth in the examples were performed by the following methods.

(1) Clothing temperature In a room of constant temperature and humidity of 30 ° C. and humidity of 60%, a 100 W white light source for photography having a center wavelength of 1 μm was used as an energy source, and a white light source was irradiated on the surface of the fiber cloth. The back surface temperature of the fiber fabric after irradiation for 30 minutes was measured with a thermoviewer (infrared sensor, manufactured by JEOL Ltd.).

(2) Temperature in clothes A temperature measuring device as shown in the side sectional view in FIG. 1 is installed in a room at a constant temperature and humidity of 30 ° C. and a humidity of 60%, and a 100 W white color for a photograph having a center wavelength of 1 μm as an energy source. Using the light source 1, the fiber fabric 2 to be measured at a position 60 cm from the light source 1
When the white light is irradiated on the surface of the cloth 10 for 10 minutes, the black polyester cloth 4
The temperature was measured by the temperature sensor 3 in front of the above, and the light shielding property of the fiber cloth 2 was evaluated.

Example 1 In m-cresol solvent, a concentration of 0.5 g / decile,
6 nylon 95 with a relative viscosity of 2.6 measured at a temperature of 20 ° C.
And parts by weight, a maximum particle size of lengthwise direction 20 [mu] m, what maximum particle size in the thickness direction was melted and mixed and Na ₂ Ti ₆ O ₁₃ fine particles 5 parts by weight of 0.3μm as a core component, Na ₂ Ti ₆ A concentric core-sheath composite fiber having a core / sheath weight ratio of 70/30 was melt-spun using the same 6 nylon without added O ₁₃ fine particles as a sheath component. At this time, the spinning temperature was set to 250 ° C. and the yarn was taken at a speed of 1500 m / min.
It was stretched and heat-treated at a heat treatment temperature of 165 ° C. by 2.6 times to obtain a multifilament yarn 70d / 24f of the present invention.

The obtained filament yarn was used as a warp and a weft to produce a plain weave having a warp density of 115 yarns / inch and a weft density of 90 yarns / inch. The greige was scoured and pre-set by a conventional method, and then dyed yellow with Suminol Fast Yellow 2GP (Sumitomo Chemical Co., Ltd., acid dye) 1% owf.

Next, a resin solution of the following formula 1 was printed on the back surface of the above-mentioned fiber cloth by a flat screen (lattice pattern, opening ratio 60%), dried at 80 ° C. for 2 minutes, and then dried at 150 ° C. for 1 minute. Heat treatment was performed for 5 minutes to obtain a cool-sensible fiber fabric of the present invention. Formulation 1 DEXCEL CLEAR 3301 100 parts (Dai Nippon Ink and Chemicals, Inc., acrylic binder) DEXCEL CLEAR AGENT 2K 1 part (Dai Nippon Ink and Chemicals, Inc., crosslinking agent for binders) DEXCEL CLEAR AGENT 15V 1 part (Large) Nippon Ink Chemical Industry Co., Ltd., thickener) WB 1415 30 parts (Toyo Aluminum Co., Ltd., near-infrared reflective material) Water 60 parts

For comparison with the present invention, in this example, the processing for comparison was carried out in exactly the same manner as in this example, except that the resin solution of formula 1 was printed on the front surface instead of the back surface of the fiber cloth. A fabric (Comparative Example 1) was obtained.

Further, in this example, a processed cloth for comparison (Comparative Example 2) was prepared in exactly the same manner as in this example except that the resin solution shown in the following formula 2 was used instead of formula 1.
And). Prescription 2 DEXCEL CLEAR 3301 100 parts (Dainippon Ink & Chemicals, Inc., acrylic binder) DEXCEL CLEAR AGENT 2K 1 part (Dainippon Ink & Chemicals, Inc., crosslinking agent for binders) DEXCEL CLEAR AGENT 15V 1 part (Large) Nippon Ink Chemical Industry Co., Ltd., thickener) Water 60 parts

Further, for comparison with the present invention, nylon 6 used as a sheath component in the present embodiment was used for both the core component and the sheath component, and a processing for comparison was performed in exactly the same manner as in the present embodiment. A fabric (Comparative Example 3) was obtained.

Further, in this example, 6 nylon used as the sheath component was used for both the core component and the sheath component, and the resin solution of the formulation 2 was used instead of the formulation 1.
A work cloth for comparison (referred to as Comparative Example 4) was obtained in exactly the same manner as in this example.

The performances of the present invention and the comparative fabric obtained as described above were measured, and the results are shown in Table 1.

[Table 1]

As is clear from Table 1, the fiber fabric of the present invention in which the sunlight reflecting layer was formed on the back surface of the fiber fabric containing the alkali metal titanate or the alkaline earth metal titanate was the same as in Comparative Example 4. It can be seen that it has an excellent cool feeling effect as compared with the printed fiber fabric of No. 1, and that the cool feeling effect is also improved as compared with known cool feeling fiber fabrics such as Comparative Examples 1, 2, and 3.

[0030]

According to the present invention, it is possible to obtain a fiber fabric having a good cooling sensation that suppresses a rise in the temperature of clothes and the temperature inside clothes under direct sunlight.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a main part of an apparatus for measuring the temperature in clothes of a cool-sensible fiber cloth of the present invention.

[Explanation of symbols]

1 100 W white light source for photography 2 Fiber fabric to be measured 3 Temperature sensor 4 Black polyester fabric (both warp and weft 75d / 36
f, warp density 110 yarns / inch, weft yarn density 80 yarns / inch) 5 20mm thick foamed polystyrene insulation

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D03D 15/00 D06M 11/00

Claims (1)

(57) [Claims] 1. A cooling sensation characterized by having a solar reflective layer on the back surface of a fiber fabric made of fibers containing at least one kind of ceramic fine particles of alkali metal titanate or alkaline earth metal titanate. Fabric.