JP2699541B2 - Laminated fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention has an effect of absorbing electromagnetic wave energy of sunlight and converting it into heat, has an excellent heat retaining effect, and has both moisture permeability and waterproofness. It relates to a laminated fabric.

(Prior art) Conventionally, in order to enhance the heat retaining effect, the cloth is thickened,
Means have been taken to reduce the amount of ventilation, to provide an air layer with low heat conduction, and to subdivide the air layer with fibers to prevent air convection. In addition, in order to suppress heat radiation to the outside, for example, a cloth having a metal deposition film is used.

(Problems to be solved by the invention) However, in any of these, the heat inside is heat conduction,
It was intended to suppress loss due to heat convection or heat radiation, and did not actively take in external energy.

(Means for Solving the Problems) The present invention aims to enhance the heat retaining effect by actively taking in electromagnetic energy of sunlight, in particular, of external energy.

The present invention provides the following (a)-
(D).

That is, (a) a polyurethane film and a base cloth having a moisture permeability of 30
00g / m ² · 24hr or more, in the laminated fabric of water is not less than 1000mm water column, and the transmitted light intensity of the base fabric consisting of highly transparent fiber material 10 × 10 ^-2 or more, the polyurethane film is from 5 to 60
(b) a laminated fabric comprising a polyurethane film, a polyurethane intermediate layer, and a base fabric, wherein the moisture permeability is 3000 g / m. ² · 24hr or more, water resistance of 1000
In a laminated fabric having a water column of not less than 10 mm, the transmitted light intensity of a base fabric made of a highly transparent fiber material is 10 × 10 ^-2 % or more, and the polyurethane film and / or polyurethane
(C) a polyurethane film having a thickness of 5 to 30 μm, a discontinuous polyurethane intermediate layer and transparency, comprising 〜60% by weight of a solar absorber and 5-60% by weight of a far-infrared radiating agent. And a base fabric made of a high-fiber material, wherein the polyurethane intermediate layer contains 5 to 60 wt% of a solar absorber and a far-infrared ray radiating agent.
Containing 60 wt%, moisture permeability of 3000g / m ² · 24hr or more, water resistance is
(D) the laminated fabric characterized by having a water column of 1000 mm or more; (d) the polyurethane film and / or the polyurethane intermediate layer contains 3 to 30% by weight of an ultraviolet absorber; (C) The laminated fabric described in (c).

In the present invention, the form of the base fabric may be any of a woven fabric, a knitted fabric, and a nonwoven fabric.

 The material of the base fabric used in the present invention is not particularly limited.

The thickness of the base fabric used in the present invention is such that when the base fabric is used as the outermost layer, it is difficult to pass far-infrared rays as compared with the innermost polyurethane film, and the far-infrared rays are selectively applied from the polyurethane film side. Perspective to radiate inside and lightweight,
From the viewpoints of strength and moisture permeability, the thickness is preferably larger than the thickness of the polyurethane film. More preferably, the thickness is 100 to 1000 μm (0.1 to 1 mm).

In the present invention, the transmitted light intensity of the base cloth refers to the intensity of light transmitted through the sample, measured using an automatic goniophotometer as described in the section of Examples below.

In the present invention, the transmitted light intensity of the base cloth is 10 × 10 so as not to impair the ratio of sunlight reaching the inside covered by the base cloth.
^-2 % or more is preferable.

It is preferable that the transmitted light intensity of the base cloth is higher, but it is generally difficult to obtain a base cloth whose transmitted light intensity exceeds 10 × 10 ^-1 %.

In order to achieve such a high transmitted light intensity, the fiber material of the base fabric should be as transparent as possible. Is preferred. Also,
The thickness of the base cloth is preferably 0.5 mm or less. Further, the cross cover factor is preferably as rough as possible within a practical range of 0.85 or less.

The cross cover factor is a value calculated by the following equation.

K _C = K ₁ + K ₂ −K ₁ × K ₂ where K _C : cross cover factor K ₁ : warp diameter / center distance between adjacent warps K ₂ : weft diameter / center distance between adjacent wefts Polyurethane in the present invention The film may be a nonporous film or a microporous film.

When a non-porous polyurethane film is used, for example,
Aliphatic polyisocyanates such as hexamethylene diisocyanate are added to both ends of an aliphatic polyester obtained by reacting adipic acid with 1,4-butanediol, and aliphatic polyhydric isocyanates such as hexamethylene diamine are added thereto. It can be formed from a solution of an aliphatic polyurethane resin obtained by gradually adding an amine, and a resin obtained by mixing a resin having compatibility with the aliphatic polyurethane resin and being insoluble in water and having hydrophilicity. it can.

In the case of forming a microporous polyurethane film, a so-called wet method in which a polar organic solvent solution of a polyurethane polymer is applied to a base cloth and then dipped in an aqueous solution to form a polyurethane microporous film, or in oil. A water-based polyurethane polymer is used as a solvent solution, and a water-dispersed polyurethane solution in which water is dispersed is applied to a base fabric, and then subjected to a heat treatment to form a polyurethane microporous film. Can also be formed.

Pretreatment with a water repellent before forming the polyurethane film is also preferably carried out from the viewpoint of improving the feeling and improving the adhesion between the polyurethane film and the fabric.

The thickness of the polyurethane film of the laminated fabric of the present invention is preferably in the range of 5 to 30 μm from the viewpoint that the polyurethane film has a function as a protective layer and that the far-infrared transmittance at a wavelength of about 10 μm is kept high.

In addition, an ultraviolet absorber, a sunlight absorber, a far-infrared radiator, and the like, which will be described later, are dispersed or mixed in the polyurethane solution so as to have a content within a predetermined range after the film is formed.

In the present invention, since the polyurethane intermediate layer also functions as an adhesive layer for bonding the above-mentioned polyurethane film to the base fabric, polyurethane of the same material is preferably used.

Further, from the viewpoint of moisture permeability and flexibility of the laminated fabric of the present invention, the polyurethane intermediate layer is preferably a discontinuous layer. The discontinuous layer may be a layer that is discontinuous to the extent that the moisture permeability and flexibility of the laminated fabric are not impaired. For example, the holes may be arranged with regularity, or may be striped or polka dots. It is preferable to arrange them in a pattern, a lattice, a mesh, a checkered pattern, or the like.

Such a discontinuous polyurethane intermediate layer can be formed, for example, by gravure coating.

The moisture permeability of the laminated fabric of the present invention having a film having the polyurethane film must be 3000 g / m ² · 24 hours or more. If the water vapor transmission rate is less than 3000 g / m ² · 24 hr, the user will feel stuffy when wearing the garment. On the other hand, the higher the moisture permeability, the better, but it is generally difficult to obtain a laminated fabric of 10,000 g / m ² · 24 hr or more.

The laminated fabric of the present invention having the polyurethane film, 10
Must have a water resistance of at least 00 mm water column. If the water resistance is lower than 1000 mm water column, water leakage will be recognized when worn as clothing for a long time in the rain. On the other hand, the higher the water resistance, the better, but it is difficult to make the water resistance 5.0 kg / cm ² or more in order to have the above moisture permeability.

The polyurethane film and / or polyurethane intermediate layer forming the laminated fabric of the present invention preferably contains 3 to 30% by weight of an ultraviolet absorber since energy in the ultraviolet region can be effectively used.

In this case, the content of the ultraviolet absorber is preferably set to 30% by weight or less so that the feeling does not become coarse and hard.

As the ultraviolet absorber, those which are less susceptible to photodecomposition or photooxidation, absorb ultraviolet light, and efficiently convert the ultraviolet light into heat energy are preferred. For example, a benzophenone ultraviolet absorber, a triazole ultraviolet absorber, a salicylic acid derivative ultraviolet absorber, an acrylonitrile derivative ultraviolet absorber, a fluorescent white dye, zinc white, and titanium oxide are exemplified. Examples of the fluorescent white dye include a dithiaminostilbene disulfonic acid derivative, an imidazole derivative, and a coumarin derivative.

When a polyurethane intermediate layer is present in the present invention, it is preferable that the ultraviolet absorbent is contained in the polyurethane intermediate layer in an amount of 5 to 60% by weight from the same viewpoint as the above-mentioned polyurethane film.

In the present invention, the solar absorbent must be contained in at least 5 to 60% by weight of any one of the polyurethane film and / or the polyurethane intermediate layer of the laminated fabric of the present invention. If it is less than 5 wt%, the ability to absorb visible light is low,
On the other hand, if it exceeds 60 wt%, the hand becomes coarse and hard.

In the present invention, the solar absorber means a substance that efficiently absorbs visible light, and is preferably, for example, a metal oxide or a metal carbide. Examples of the metal oxide include, for example,
As oxides of Cr, Fe, Mn, and Cu, and metal-based carbides, for example, carbides of Si and Zr are preferably used.

Further, when the polyurethane film and / or polyurethane intermediate layer contains a predetermined amount of far infrared radiation agent,
It is preferable because the absorbed visible light can be converted into far infrared rays and emitted.

Further, the polyurethane film of the laminated fabric of the present invention and / or
Alternatively, as the far-infrared ray radiating agent contained in the polyurethane intermediate layer, ZrO ₂ , SiO ₂ , and Al ₂ O can efficiently emit far-infrared rays having a wavelength of about 3 μm or more, but about 10 μm, at a temperature of about the human body temperature. Ceramic powders such as ₃ are preferably used.

The content of the ceramic powder in the polyurethane film and / or polyurethane intermediate layer is preferably in the range of 5 to 60 wt% from the viewpoint of far-infrared radiation effect and feeling.

The laminated fabric of the present invention efficiently converts sunlight passing through a base fabric made of a highly transparent fiber material into heat energy with a solar light absorber, and efficiently converts the heat energy to the human body side with a far-infrared radiation agent. This is a technical idea of obtaining an excellent heat retaining effect by radiating, and a base fabric made of a highly transparent fiber material, a solar absorbent, and a far-infrared radiant are important.

The total content of additives such as an ultraviolet absorber, a solar absorber and a far-infrared radiator is preferably 60 wt% or less from the viewpoint of feeling.

With the laminated fabric of the present invention having such a structure, the color of the base fabric can be freely selected, and the sunlight can be absorbed and used by the sunlight absorbent without waste.

[Example] Hereinafter, an example will be described in more detail.

The physical properties of the laminated fabric of the present invention were measured by the following methods.

[4] Using an automatic goniophotometer GP-1R (manufactured by Murakami Color Research Laboratory Co., Ltd.), set up the sample so that the light from the light source is cut off under the following conditions. The strength (%) was measured.

 Angle between light source and light receiver: 180 ° Light source: tungsten coil bulb with transparent bulb Neutral filter: ND-1 used Scale: 100% without sample (air).

[Moisture Permeability] According to JIS L 1099 (A-1 method).

[Water resistance] JIS L 1092 (hydrostatic method of A method and B method) was used.

The difference between the method A (low water pressure method) and the method B (high water pressure method) will be described below.

In the method A (low water pressure method), since the water pressure is read by a manometer, the measurable water pressure range is limited to within the height of the manometer. The height of the manometer is 2000 mm in a commercially available measuring device, and the water resistance is 2000 mm.
Samples exceeding mmH ₂ O cannot be measured.

Therefore, a sample having a water resistance exceeding 2000 mmH ₂ O is measured by the B method (high water pressure method) which can measure up to about 6 kg / cm ² .

In Examples and Comparative Examples described below, the unit of water resistance is mmH ₂
O indicates a value measured by the method A (low water pressure method), and a unit having a water resistance of kg / cm ² indicates a value measured by the method B (high water pressure method).

[Washing] According to JIS L 0844 (C-1S method).

<Example 1> A nylon filament semi-dal yarn of 70d-12f as a warp and a nylon filament semi-double yarn of 140d-34f as a weft, and a nylon taffeta woven to a warp finishing density of 139 yarns / inch is dyed green. After this, the transmitted light intensity was 20 × 10 ^-2 %.

[Formation of polyurethane film] With respect to 1 mol of polyether diol having an average molecular weight of 1000, 2 mol of isophorone diisocyanate was subjected to an addition reaction,
A polyurethane resin obtained by polymerizing the obtained isocyanate prepolymer at both ends with triethylenediamine is dissolved in methyl ethyl ketone, and the polyurethane resin concentration is reduced.
A coating solution of 70 wt% was prepared. The coating solution was applied on release paper using a knife over roll coater so that the film thickness after drying was 10 μm, and then dried at 80 ° C. to form a 10 μm thick polyurethane nonporous film. .

[Formation of Polyurethane Intermediate Layer] CrO ₂ powder having a particle size of 0.5 to ₂ μm, Cu having a particle size of 0.5 to ₂ μm
O powder and triazole UV absorber tinuvin-
20 g of a mixture containing P (manufactured by Ciba-Geigy) powder at a weight ratio of 5/3/2, 38 g of a polyurethane-based adhesive, and ZrO ₂
An adhesive solution was prepared by mixing 8 g of the powder with 200 g of toluene.

Using a gravure roll coater, apply the above adhesive liquid to the above polyurethane non-porous film formed on release paper in the form of dots.
50 g / m ^{2 was} applied and dried with hot air at 100 ° C.

[Lamination] The above-mentioned nylon taffeta was superposed in a zero-gravity state on the polyurethane intermediate layer formed by drying the adhesive liquid, lightly nipped with a mangle, heated to 100 ° C., and the release paper was removed. Next, a fluorinated water repellent was applied to the fabric surface with a gravure roll.
After adhering to 0.05wt% and treating at 120 ° C, further 24 hours at 40 ° C
By keeping it, a polyurethane film with a thickness of 10 μm and 27.6
It has a point-discontinuously arranged polyurethane intermediate layer containing wt% of a solar absorber, 13.8 wt% of a far-infrared radiating ceramic powder and 6.9 wt% of an ultraviolet absorber, and has a moisture permeability of
A laminated fabric having a water resistance of 1400 g / m ^{2 for} 24 hours and a water resistance of 1 kg / cm ² was obtained.

<Example 2> CrO ₂ powder having a particle size of 0.5 to ₂ μm, Cu having a particle size of 0.5 to ₂ μm
O powder, ZrO ₂ powder with a particle size of 0.1 to 0.3 μm
24g of mixture containing polyester polyurethane 3
4 g was mixed with 200 g of a mixed solvent of dimethylformamide / toluene (volume ratio 1/1) to prepare a dispersion.

The basis weight consisting of 75d-36f polyester filament 10
On a single surface of a 0 g / m ² plain woven fabric (taffeta), the above dispersion was applied at a point of 10 g / m ² using a gravure roll coater engraved into a point of 20 mesh, and dried with hot air at 100 ° C. Then, a discontinuous polyurethane intermediate layer having a visible light absorbing function and a far infrared radiation function was formed. Addition reaction of 2 mol of isophorone diisocyanate to 1 mol of polyester diol having an average molecular weight of 1000, and a 10 μm-thick polyurethane resin film obtained by polymerizing the obtained isocyanate prepolymer at both ends with triethylenediamine on release paper. Then, a polyurethane film having a thickness of 10 μm was formed using a knife over roll coater.

On top of the polyurethane intermediate layer, the above polyurethane film was superposed under no tension, lightly nipped with a mangle, heated to 100 ° C, and after removing the release paper, it was further heated for 40 hours for 40 hours.
A laminated fabric having a polyurethane film having a thickness of 10 μm and a polyurethane intermediate layer arranged discontinuously in a dot-like manner by maintaining the polyurethane intermediate layer at 27.6 wt% of a solar absorbent, far infrared rays A laminated fabric containing 13.8 wt% of a radiating agent, having a moisture permeability of 3500 g / m ² · 24 hr, and a water resistance of 1.0 kg / cm ² was obtained.

<Comparative Example 1> A polyurethane film having a thickness of 10 µm was provided in exactly the same manner as in Example 1, except that the polyurethane intermediate layer did not contain CrO ₂ powder, CuO powder, or an ultraviolet absorbent powder. A laminated fabric having a moisture permeability of 3800 g / m ² · 24 hr and a water resistance of 1 kg / cm ² was obtained.

<Comparative Example 2> A polyurethane intermediate layer having a thickness of 10 µm and a polyurethane intermediate layer containing 6.9 wt% of an ultraviolet absorbent was prepared in exactly the same manner as in Example 1 except that the polyurethane intermediate layer did not contain CrO ₂ powder and CuO powder. , A water vapor transmission rate of 3800 g / m ² · 24 hr and a water resistance of 1 kg / cm ² were obtained.

<Example 3> A nylon fabric equivalent to that used in Example 1 was treated with a fluorine-based water repellent solution, dried and heat-treated. The amount of the fluorine-based water repellent attached to the fabric was 0.04% by weight.

16 parts by weight of polyester polyurethane elastomer,
0.4 parts by weight of fluorine-based water repellent, adduct of trimethylolpropane / hexamethylene diisocyanate (molar ratio 1: 3) 1
Parts by weight, 5 parts by weight of polypropylene glycol / polyethylene glycol block polymer (nonionic surfactant), 2 parts by weight of CrO ₂ powder having a particle size of 0.5 to 2 μm, particle size of 0.5 to
A coating liquid was prepared by dissolving 1.5 parts by weight of 2 μm CuO powder and 2 parts by weight of ZrO ₂ powder having far-infrared radiation in 74.1 parts by weight of dimethylformamide.

This coating solution was applied on the water-repellent treated fabric using a reverse coater so as to have a concentration of 300 g / m ² (when wet), and then immersed in a 10% aqueous solution of dimethylformamide kept at 30 ° C. for 5 minutes. After gelling, wash with water at 80 ° C for 30 minutes,
After drying with hot air at 100 ° C., heat treatment was performed at 140 ° C. for 3 minutes.

1% by weight of fluorine-based water repellent
After being immersed in the solution and uniformly squeezed with a mangle to a squeezing ratio of 70%, it is heat-treated at 150 ° C. for 30 seconds using a heat setter, so that the moisture permeability is 5500 g / m ² · 24 hr and the water resistance is 1600 mm
A laminated fabric as a water column was obtained.

This laminated fabric has no polyurethane intermediate layer and has a thickness of 50
A μm polyurethane film contains 15.9 wt% of a solar absorber and 9.5 wt% of ZrO ₂ powder having far-infrared radiation.

<Example 4> Using the same nylon fabric as that used in Example 1,
As a coating liquid for forming a polyurethane film, 15 parts by weight of a polyester-based polyurethane elastomer, 0.4 parts by weight of a fluorine-based water repellent, 1 part by weight of an adduct of trimethylolpropane / hexamethylene diisocyanate (molar ratio 1: 3), polypropylene 5 parts by weight of glycol / polyethylene glycol block polymer (nonionic surfactant), 2 parts by weight of CrO ₂ powder having a particle size of 0.5 to ₂ μm, particle size of 0.5 to ₂ μm
1.5 parts by weight of CuO powder, 1 part by weight of a triazole-based ultraviolet absorber Tinuvin-P (registered trademark, manufactured by Ciba-Geigy), and 2 parts by weight of ZrO ₂ powder having far-infrared radiation into 74.1 parts by weight of dimethylformamide. A water vapor transmission rate of 5400 g / m ² was obtained in the same manner as in Example 3 except that the coating liquid was prepared by dissolution.
A laminated fabric having a water resistance of 1550 mm in water for 24 hours was obtained.

This laminated fabric has no polyurethane intermediate layer and has a thickness of 50
15.9wt% of sun absorber in μm polyurethane film,
It contains 9.1 wt% of ZrO ₂ powder having far infrared radiation and 4.5 wt% of an ultraviolet absorber.

<Example 5> Using the same nylon fabric as that used in Example 1,
The moisture permeability was 3400 g / m ² · 24h in the same manner as in Example 2 except that the polyurethane film also contained 15.9 wt% of a solar absorber.
r, A laminated fabric having a water resistance of 0.9 kg / cm ² was obtained.

This laminated fabric has a polyurethane intermediate layer and has a thickness of 10 μm.
m, a polyurethane absorber containing 15.9 wt% of a solar absorber, a polyurethane intermediate layer containing 26.7 wt% of a solar absorber, and 13.3 wt% of ZrO ₂ powder having far-infrared radiation.

<Comparative Example 3> A wooly processed yarn in which a 110d-24f nylon filament semi-dull yarn and a 20d polyurethane fiber are aligned in the warp,
140d-68f nylon filament full dull yarn for weft, dyed green, transmitted light intensity 3 × 10 ^-2 %
A 10 μm-thick polyurethane film and a 26.7 wt% sunlight absorbing agent were prepared in the same manner as in Example 1 except that the nylon / polyurethane fiber mixed woven fabric was used as a base fabric and the polyurethane intermediate layer did not contain an ultraviolet absorber. And a polyurethane intermediate layer arranged discontinuously in a point-like manner, and the moisture permeability is 3400 g /
A laminated cloth having a water resistance of 1 kg / cm ² for m ² · 24 hr was obtained.

Comparative Example 4 A dispersion was prepared by mixing 8 g of ZrO ₂ powder having far-infrared radiation and 50 g of polyester-based polyurethane in 200 g of a mixed solvent of dimethylformamide / toluene (volume ratio 1/1). A laminated fabric having a polyurethane film having a thickness of 10 μm and a polyurethane intermediate layer disposed discontinuously in a dot-like manner, in exactly the same manner as in Example 2 except that a polyurethane intermediate layer was formed. has 13.3Wt% of the far infrared radiation material, the moisture permeability is 3500g / m ² · 24h
r, a laminated fabric having a water resistance of 1 kg / cm ² was obtained.

<Comparative Example 5> Using a nylon fabric equivalent to that used in Example 1,
The moisture permeability was 3400 g / m ² · 24 hr, in the same manner as in Example 3, except that the polyurethane film did not contain a sunlight absorbent and the polyester-based polyurethane elastomer was 19.5 parts by weight.
A laminated fabric having a water resistance of 1.0 kg / cm ² was obtained.

This laminated fabric has no polyurethane intermediate layer and has a thickness of 50
Zr with far-infrared radiation in μm polyurethane film
It contains only 9.1 wt% of O ₂ powder.

<Comparative Example 6> Using a nylon fabric equivalent to that used in Example 1,
17 parts by weight of a polyester-based polyurethane elastomer, 0.4 part by weight of a fluorine-based water repellent, 1 part by weight of an adduct of trimethylolpropane / hexamethylene diisocyanate (molar ratio 1: 3) as a coating liquid for forming a polyurethane film, polypropylene Example 3 except that 5 parts by weight of a glycol / polyethylene glycol block polymer (nonionic surfactant) and 2 parts by weight of ZrO ₂ having far-infrared radiation were dissolved in 74.1 parts by weight of dimethylformamide to prepare a coating liquid. In the same manner as in the above, a laminated fabric having a moisture permeability of 5500 g / m ² · 24 hr and a water resistance of 1600 mm water column was obtained.

<Comparative Example 7> As an adhesive liquid for forming a polyurethane intermediate layer,
Reduced the amount of sunlight absorbent, 38g of polyurethane adhesive
In the same manner as in Example 1 except that the ZrO ₂ powder and the ultraviolet absorbent powder were not contained, a polyurethane film having a thickness of 10 μm and a dot-like configuration containing 4.0 wt% of a solar absorbent were discontinuously arranged. With a polyurethane intermediate layer and a moisture permeability of 3900
A laminated fabric having a g / m ² of 24 hr and a water resistance of 1.0 kg / cm ² was obtained.

<Comparative Example 8> As an adhesive liquid for forming a polyurethane intermediate layer,
Increased the amount of sunlight absorbent, 38g of polyurethane adhesive
In the same manner as in Example 1 except that the ZrO ₂ powder and the ultraviolet absorber powder were not contained, a polyurethane film having a thickness of 10 μm and a dot-like configuration containing a solar absorber of 62.0 wt% were discontinuously arranged. Polyurethane intermediate layer, with a moisture permeability of 3000
A laminated fabric having a g / m ² of 24 hr and a water resistance of 0.8 kg / cm ² was obtained.

<Example 6> A polyurethane film having a thickness of 10 µm, a solar absorber of 27.6 wt%, and a far infrared ray of 5.5 wt% was prepared in exactly the same manner as in Example 2 except that the amount of the far-infrared radiating agent was reduced. A laminated fabric having a polyurethane intermediate layer containing a radiating agent and arranged discontinuously in a dot shape, having a moisture permeability of 3600 g / m ² · 24 hr, and a water resistance of 1.0 kg / cm ² was obtained.

<Example 7> A polyurethane film having a thickness of 10 µm, a solar absorber of 27.6 wt%, and a far-infrared radiation of 15.9 wt% were exactly the same as in Example 2 except that the amount of the far-infrared radiating agent was increased. And a polyurethane intermediate layer discontinuously arranged in a dot-like manner containing an agent, and the moisture permeability is
A laminated fabric having a water resistance of 3,500 g / m ² · 24 hr and a water resistance of 1.0 kg / cm ² was obtained.

<Example 8> A polyurethane film having a thickness of 10 µm, a solar absorber of 27.6 wt%, and a far-infrared radiation of 33.0 wt% were exactly the same as in Example 2 except that the amount of the far-infrared radiating agent was increased. And a polyurethane intermediate layer discontinuously arranged in a dot-like manner containing an agent, and the moisture permeability is
A laminated fabric having 3000 g / m ² · 24 hr and a water resistance of 0.8 kg / cm ² was obtained.

<Example 9> The fabric side of the laminated film fabrics obtained in Examples 1 to 8 and Comparative Examples 1 to 8 was exposed to artificial sunlight, and the temperature of the back surface of the fabric was measured with a thermocouple.

Exposure conditions are as follows: Artificial sunlight irradiation intensity is 650 kcal / m ²
Hr and environmental conditions were 5 ° C. and humidity 60% RH.

In the present invention, artificial sunlight is a color temperature of 5000 K
Means a light beam emitted from a sunlight lamp (manufactured by Toshiba Corporation), and the energy distribution approximates to sunlight.

 Table 1 shows the temperature of the back surface of the fabric 30 minutes after the start of irradiation.

In Examples 3 and 4 and Comparative Examples 5 and 6, a polyurethane film was formed by coating. However, this film was not uniform in thickness due to the surface irregularities of the fabric itself. The average thickness was displayed as the thickness.

As shown in Table 1, the laminated fabric of the present invention obtained in Example 1 had a fabric back surface temperature of 7 compared to the laminated fabrics of Comparative Examples 1 to 3.
８8 ° C. higher. In addition, the laminated fabric of the present invention obtained in Example 2 had a fabric backside temperature higher by 7 ° C. than the laminated fabric of Comparative Example 3.

Furthermore, the laminated fabric of the present invention has good washing resistance,
After 5 washes, the physical properties hardly changed, and there was no change in feeling or appearance.

<Example 10> Using the laminated fabrics obtained in Example 2 and Comparative Example 1, both were exposed to a high-temperature body having a color temperature of 5000 K in an artificial weather chamber, and the temperatures of both surfaces of the fabric were measured.

The irradiation intensity of the high-temperature body was 650 kcal / m ² · hr, and the environmental conditions were a temperature of 5 ° C. and a humidity of 60% RH.

The result is shown in FIG. The horizontal axis represents time (min), and the vertical axis represents the temperature (° C.) of the back surface of the fabric. In the figure, A indicates a time zone in which the high-temperature body is irradiated, and B indicates a time zone in which a wind of 2 m / sec is applied.

Approximately 20 minutes after the start of the irradiation, the front surface temperature and the back surface temperature of the fabric became substantially constant. 30 from the start of irradiation
The temperatures on both sides of the fabric after one minute are shown in Table 2.

As shown in Table 2, the laminated fabric of the present invention obtained in Example 2 had a fabric surface temperature of 6 ° C. as compared with the laminated fabric of Comparative Example 1.
The fabric backside temperature was 6 ° C higher.

<Example 11> Four blousons were sewn using the laminated fabric of the present invention obtained in Example 2 and the laminated fabric obtained in Comparative Example 6, respectively, and worn outdoors in fine winter weather (temperature: 8 ° C). did. There were four subjects.

All of the subjects reported that the blousons made of the laminated fabric of the present invention felt warmer.

<Example 12> Using a nylon fabric equivalent to that used in Example 1,
By the same method as that described in Example 2 except that even in the polyurethane coating was contained solar absorber 15.9Wt% and far-infrared radiation material 9.1 wt% moisture permeability 3400g / m ² · 24hr, water resistance is 0.9 kg / cm ² was obtained. This laminated fabric has a polyurethane intermediate layer, and in a 10 μm-thick polyurethane film, 15.9 wt% of a solar absorbent, 9.1 wt% of a far-infrared radiator, 26.7 wt% of a solar absorbent in a polyurethane intermediate layer, and It contains 13.3 wt% of ZrO ₂ powder having far-infrared radiation.

(Effect of the Invention) The laminated fabric of the present invention has a function of efficiently absorbing sunlight, raising the temperature in clothes, and has both moisture permeability and waterproofness. It is a suitable material.

[Brief description of the drawings]

1, 2 and 3 are schematic sectional views of the laminated fabric of the present invention. FIG. 4 is an experimental result obtained by measuring a laminated fabric obtained in the same manner as in Example 1 using the base cloths having different transmitted light intensities under the same conditions as in Example 9; FIG. FIG. 5 is a view showing an experimental result of Example 10. In the figure, 1: laminated fabric 2: polyurethane intermediate layer 3: polyurethane film 4: base fabric 5: temperature curve of the back of the laminated fabric of Example 2 6: temperature curve of the back of the laminated fabric of Comparative Example 1

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-59178 (JP, A) JP-A-63-35887 (JP, A) JP-A-6-1222751 (JP, A) JP-A-62-259 104974 (JP, A) JP-A-60-173177 (JP, A)

Claims (4)

(57) [Claims] 1. A laminated fabric comprising a polyurethane film and a base fabric, having a moisture permeability of 3000 g / m ² · 24 hr or more and a water resistance of 1000 mm water column or more, the transmitted light intensity of a base fabric made of a highly transparent fiber material. Is not less than 10 × 10 ^-2 , and the polyurethane film contains 5 to 60% by weight of a solar absorbent and 5 to 60% by weight of a far-infrared ray radiating agent. 2. A laminated fabric comprising a polyurethane film, a polyurethane intermediate layer and a base fabric, having a moisture permeability of 3000 g / m ² · 24 hr or more and a water resistance of 1000 mm water column or more. Has a transmitted light intensity of 10 × 10 ^-2 % or more, and the polyurethane film and / or polyurethane intermediate layer contains 5 to 60% by weight of a solar absorbent and 5 to 60% by weight of a far-infrared ray radiating agent. Laminated fabric. 3. A laminated fabric comprising a polyurethane film having a thickness of 5 to 30 μm, a discontinuous polyurethane intermediate layer, and a base fabric made of a highly transparent fiber material, wherein the polyurethane intermediate layer contains 5 A laminated fabric characterized by containing 積 層 60% by weight, far infrared radiating agent in an amount of 56060% by weight, moisture permeability of 3000 g / m ² · 24 hours or more, and water resistance of 1000 mm water column or more. 4. The laminated fabric according to claim 1, wherein the polyurethane film and / or the polyurethane intermediate layer contains 3 to 30% by weight of an ultraviolet absorber.