JP2020152039A - Cool feeling fabric and cloth product - Google Patents

Abstract

To provide a cool feeling fabric and a cloth product with an increased sensation of coolness.SOLUTION: A cool feeling fabric 10 has a front fabric 11 and a back fabric 12 bonded together through an adhesive layer 13. The back fabric 12 is a fabric comprising a functional thread having at least one of an infrared reflector and a thermal conductivity improver.SELECTED DRAWING: Figure 1

Description

The present invention relates to cool fabrics and fabric products.

For clothes and the like that are worn during high temperatures such as summer, the use of fabrics that exert an effect of feeling cool when worn (hereinafter, also referred to as a cool feeling effect) is advancing (for example, Patent Documents 1 to 5). ..

Patent Document 1 discloses a woven fabric using a functional yarn containing a hollow synthetic resin filament. Further, Patent Document 2 discloses a non-woven fabric in which microcapsules encapsulating a phase transition material are adhered to the surface. Further, Patent Document 3 discloses a dough formed of water-absorbing fibers to which a contact cooling sensation agent is added. Further, Patent Document 4 discloses a fabric in which fibers containing a thermoplastic elastomer are used. Further, Patent Document 5 discloses a fabric composed of spun yarns made of hydrophilic fibers, filament yarns having antibacterial properties, and composite twisted yarns using at least two kinds of filament yarns having high thermal conductivity. ing.

JP-A-2018-76616 Japanese Unexamined Patent Publication No. 2016-21103 Japanese Unexamined Patent Publication No. 2014-169519 Japanese Unexamined Patent Publication No. 2004-270075 Japanese Unexamined Patent Publication No. 2003-293244

Even with the fabrics that have been provided so far, there is an increasing need for fabrics that make you feel cool when you wear them.

The present invention has been made in view of the above matters, and an object of the present invention is to provide a cool feeling cloth and a cloth product which can feel cooler.

The cool feeling fabric according to the first aspect of the present invention is
It is a cool fabric in which the front fabric and the back fabric are bonded together via an adhesive layer.
The lining fabric is a fabric composed of a functional yarn having at least one of an infrared reflector and a heat conductivity improving material.
It is characterized by that.

Moreover, the front cloth may be a denim cloth.

Further, the backing fabric may be a knitted fabric composed of the functional yarn.

Further, it is preferable that the contact cold / warm feeling measured under the condition of ΔT = 20 ° C. in the thermolab method is 0.4 W / cm ² or more.

Further, it is preferable that the contact cold / warm feeling measured under the condition of ΔT = 10 ° C. in the thermolab method is 0.2 W / cm ² or more.

The cloth product according to the second aspect of the present invention is
Consists of a cool feeling fabric according to the first aspect of the present invention.
It is characterized by that.

According to the present invention, it is possible to provide a cool feeling fabric and a cloth product that can feel cooler.

It is sectional drawing which shows the structure of a cool feeling cloth. It is a figure of the apparatus used in the verification experiment of the heat shield temperature in an Example.

As shown in FIG. 1, the cool feeling cloth 10 according to the present embodiment has a structure in which the front cloth 11 and the back cloth 12 are bonded to each other via an adhesive layer 13. When a cloth product such as clothes is manufactured from the cool feeling cloth 10, the front cloth 11 functions as the outer material of the cloth product, while the back cloth 12 becomes the lining of the cloth product. The lining fabric 12 comes into direct or indirect contact with the skin of a person wearing clothes made from the cool feeling fabric 10, and makes the wearer feel cool. Further, the infrared reflective material contained in the functional yarn constituting the backing material 12 also has a heat shielding effect.

The outer fabric 11 is a fabric mainly composed of ordinary yarn, and may be any fabric such as a woven fabric or a knitted fabric. The plain yarn may be composed of any material, for example, one or more natural fibers selected from the group consisting of cotton, hair, hemp, and silk. When the outer fabric 11 of the cool feeling fabric 10 is made of natural fiber threads, it has the same appearance and texture as the existing natural fiber fabric, but has a function of giving a cool feeling. Will be done.

The lining fabric 12 is composed of a functional yarn, and the functional yarn contains at least one of an infrared reflector and a heat conduction improving material, and preferably contains both. In the following, an example in which the functional yarn contains both an infrared reflector and a heat conduction improving material will be described. The functional yarn is composed of at least one synthetic resin material selected from the group consisting of nylon, polyester and polyurethane, an infrared reflective material, and a heat conductivity improving material.

Nylon and polyester constituting the functional yarn have almost no water absorption or hygroscopicity by themselves, so that the cool feeling fabric 10 has a quick-drying property. Due to the high quick-drying property of the cool sensation fabric 10, it is difficult to get stuffy, which leads to further improvement of the cool sensation effect.

The thermal conductivity improving material functions to give a cool feeling when the skin touches the backing material 12. The thermal conductivity improving material contains, for example, at least one powder selected from the group consisting of jadeite, aegirine, cosmochlorite, diamond, silicon nitride, aluminum nitride, silicon carbide, beryllium oxide, and aluminum oxide. Can be preferably used.

The infrared reflector exhibits a function of suppressing a temperature rise from one surface of the backing cloth 12 to the other surface. As the infrared reflector, for example, a material containing a powder of a white pigment can be used. Examples of the white pigment include at least one powder selected from the group consisting of metal oxides, minerals, and inorganic substances. Examples of the metal oxide include titanium oxide and zinc oxide. Examples of minerals include white mica. Examples of the inorganic substance include calcium carbonate and barium sulfate.

The thermal conductivity improving material and the infrared reflecting material are both in the form of fine particles. The smaller the particle size of the heat conductivity improving material and the infrared reflecting material, the easier it is to be contained in the functional yarn, and it is preferable that the particle size is, for example, 300 to 500 nm. The thermal conductivity improving material and the infrared reflective material are contained in the functional yarn by being kneaded with the resin material which is the raw material of the functional yarn when the functional yarn is produced.

The larger the amount of the thermal conductivity improving material and the infrared reflective material contained in the functional yarn, the more the cool feeling effect is exhibited, while when the content of these is too large, the physical strength of the functional yarn is increased. This will result in a decrease and non-uniformity of the cross-sectional shape. Therefore, the total content of the heat conductivity improving material and the infrared reflective material in the functional yarn is preferably 4 to 7% by volume, preferably 5 to 6% by volume. Further, the blending ratio of the heat conductivity improving material and the infrared reflecting material may be set to 1: 1 as a reference, and may be arbitrary in the range of 2: 8 to 8: 2, for example, depending on which function is to be provided. Can be set to.

The lining fabric 12 may be either a woven fabric or a knitted fabric as long as it is composed of functional threads. When the lining fabric 12 is a woven fabric, one or both of the warp and weft yarns constituting the woven fabric may be woven with functional yarns, but both the warp yarns and the weft yarns function in order to enhance the cool feeling effect. It is preferably woven with sex yarn. When the backing fabric 12 is a knitted fabric, the knitting method may be various knitting methods such as flat knitting, rubber knitting, and pearl knitting.

As described in Examples described later, the cool sensation fabric 10 has a contact cold feeling of 0.4 W / cm ² or more and a test condition at ΔT = 10 ° C. measured under the test conditions at ΔT = 10 ° C. by the thermolab method. The contact cold / warm feeling measured in 1 is 0.2 W / cm ² or more, and an excellent cool feeling effect is exhibited.

The cool fabric is used as various fabrics and can be used in the production of various fabric products. As a cloth product composed of a cool feeling cloth, a cloth product worn by a person as clothing such as a shirt or trousers, especially a cloth product that comes into direct contact with human skin, allows the cool feeling effect of the cool feeling cloth to be felt. preferable.

Further, the outer fabric 11 may be a denim fabric used for jeans or the like. In general, denim fabric has a thick and durable structure, so it feels hot when worn in the summer. For this reason, many people refrain from wearing clothes made of denim fabric in the summer. However, since the cool sensation fabric according to the present embodiment includes a lining fabric composed of functional threads, it is cool while maintaining the original appearance, texture, and texture of the denim fabric. Therefore, it is very useful for people who want to wear denim cloth such as jeans even in the summer.

Since the denim fabric is generally thick, when the front fabric 11 is a denim fabric and the front fabric 11 and the back fabric 12 are bonded together, it tends to be stiff. For this reason, the backing cloth 12 is preferably a thin and soft cloth, and is preferably a knitted cloth such as a plain knitted fabric.

Further, when the back fabric 12 is a knitted fabric such as a plain knit, it has excellent elasticity, so that it can follow the expansion and contraction of the front fabric 11. For example, if the outer fabric 11 is made of a woven fabric woven with satin weave or twill weave, a cool sensation fabric 10 having more excellent elasticity can be obtained, and when a garment made from such a cool sensation fabric is worn. It follows the movement of the body and is easy to move and comfortable. Further, when the outer fabric 11 is a woven fabric and one or both of the warp and weft of the woven fabric is made of a highly elastic synthetic resin material such as polyurethane, the elasticity of the cool feeling fabric 10 is further enhanced.

The outer fabric 11 may be made of a functional yarn. When the outer fabric 11 is composed of functional threads, it can be a cool fabric 10 that produces a further cool effect. For example, as the outer fabric 11, a woven fabric woven using ordinary yarn such as cotton for the warp and functional yarn for the weft can be mentioned. Further, the front fabric 11 and the back fabric 12 are composed of functional yarns containing an infrared reflective material, and the back fabric 12 is composed of functional yarns containing a heat conduction improving material. The infrared reflector and the heat conduction improving material may be used properly.

The above-mentioned cool feeling cloth 10 is obtained by adhering the front cloth 11 and the back cloth 12 with an adhesive and integrating them. Examples of the adhesive to be used include various adhesives such as urethane-based adhesives, olefin-based adhesives, silicone-based adhesives, and vinyl acetate-based adhesives, and the front fabric 11 and the back fabric 12 can be bonded to each other. There are no particular restrictions.

The adhesive layer 13 may be formed on the entire surface of the cool feeling cloth 10 or may be formed in a pattern. The pattern-like form is not particularly limited, and examples thereof include a point shape, a linear shape, and a grid shape, and it is preferable that all of them are uniformly arranged as a whole. Further, the thickness of the adhesive layer 13 is preferably as thin as possible in order to suppress the stiffness of the cool feeling cloth 10.

Further, the front fabric 11 and the back fabric 12 may be bonded by any method. For example, an adhesive is applied to the entire surface of one fabric or in a pattern, and the other fabric is superposed. , It may be bonded by any method such as crimping with a roller.

The cool contact feeling, heat shielding property, heat dissipation property, water absorption, diffusible residual moisture content, and ultraviolet shielding rate of the produced cool feeling cloth were verified. As the cool feeling cloth used for the verification, a denim cloth was used as the front cloth, a Tenjiku knit was used as the back cloth, and a cloth obtained by adhering the front cloth and the back cloth with an adhesive was used.

The outer fabric is a denim fabric produced by satin weaving using ordinary cotton threads for the warp and weft threads. As the lining fabric, a functional yarn in which fine particles of titanium oxide and jadeite were kneaded into nylon was used, and a plain knitted tenjiku knit was used. Both titanium oxide and jadeite have an average particle size of 400 nm and are kneaded into nylon at a ratio of 5% by volume. The blending ratio of titanium oxide and jadeite was 1: 1.

Then, the front cloth and the back cloth were bonded to each other using an adhesive (made by Ata, product number 858, a mixture of methyl ethyl ketone and a cross-linking agent) to obtain a cool feeling cloth.

In addition, contrasting fabrics 1 and 2 were prepared as comparative examples. The contrast fabric 1 is a denim fabric which is the outer fabric of the cool feeling fabric described above. Further, the contrast fabric 2 is a plain knit knitted from the functional yarn which is the backing fabric of the cool feeling fabric.

(Verification experiment of cool contact feeling)
The cool contact feeling (heat flow rate peak value (qmax)) is determined by the thermolab method (test conditions: ΔT = 10 ° C, ΔT =) using a precision and rapid thermophysical property measuring device (Thermorabo II (product name, manufactured by Kato Tech Co., Ltd.)). 20 ° C.). Specifically, it is obtained by bringing the measuring part of the device heated to + 10 ° C. (ΔT = 10 ° C.) or + 20 ° C. (ΔT = 20 ° C.) at room temperature into contact with the sample at room temperature and measuring the heat absorption rate of the sample. It was. The feeling of "warm" or "cold" when the skin touches the fabric is called "contact coldness". The feeling of coldness differs depending on the amount of heat transferred from the skin to the fabric, and the index "q max (heat flow rate peak value)" for evaluating this is measured. The higher this value, the greater the amount of heat transfer, and the cooler you feel when you touch the fabric.

As a result, qmax the cool feeling fabric of this embodiment, 0.201W / cm ² in [Delta] T = 10 ° C., was 0.404W / cm ² in [Delta] T = 20 ° C., was good value.

(Verification experiment of heat insulation)
The heat-shielding property was verified by setting the above-mentioned cool feeling cloth and the contrast cloth in the test apparatus shown in FIG. 2 and measuring the temperature on the back surface of each cloth.

The test apparatus shown in FIG. 2 includes a test table 21 made of foamed styrol, a frame-shaped sample table 22 having a height of 1 cm and an opening on the top surface side and the bottom surface side, and a thermocouple sensor installed inside the sample table. 25, a black body tape 26 arranged on the thermocouple sensor 25, a ref lamp 23 for taking a picture, and a support portion 24 of the ref lamp 23 are provided. The light source of the ref lamp 23 is an incandescent light bulb.

The distance between the ref lamp 23 and the test table 21 was 30 cm, the gap between the denim fabric and the contrasting fabric 1 was 1.5 cm, and the cool feeling fabric and the contrasting fabric were placed on the sample table 22, respectively. In this state, the ref lamp 23 was turned on in an environment of 20 ° C. and a humidity of 65%, and the temperature change on the back surface of each fabric was measured by the thermocouple sensor 25 for 15 minutes.

The results are shown in Table 1. The maximum temperature difference between the cool dough and the contrasting dough 1 was 7.3 ° C. (elapsed time 6 minutes). Therefore, it can be seen that the temperature rise on the back side of the fabric is significantly suppressed even when the cool fabric is exposed to sunlight.

(Heat dissipation test)
In a test environment with a temperature of 20 ° C. and a relative humidity of 65%, heating elements were placed on the back surfaces of the cool feeling cloth and the contrasting cloth 1 to raise the sample temperature to 40 ° C. After that, the heating element was removed, and the temperature transition every minute was measured with a contact thermometer.

The results are shown in Table 2. The heat dissipation of the cool feeling cloth was slightly better than that of the contrast cloth 1.

(Verification experiment of UV shielding rate)
The ultraviolet shielding rate of each of the cool feeling cloth, the contrasting cloth 1 and the contrasting cloth 2 was measured according to AS / NZS4399: 1996. The ultraviolet shielding rate of the denim fabric was 99.9%, and the UPF grade was 50+ (Excellent projection). On the other hand, the UPF grade of the contrasting fabric 1 was 30 (Good), and the UPF grade of the contrasting fabric 2 was 15 (Minimum). Although the contrasting fabric 2 is a fabric made from functional yarn containing an infrared reflector and a heat conduction improving material, the effect of shielding ultraviolet rays by itself is low, but the contrasting fabric 1 and the contrasting fabric 2 are bonded together (a structure in which the contrasting fabric 1 and the contrasting fabric 2 are bonded together. It can be seen that the effect of shielding ultraviolet rays is enhanced by using a cool material).

(Water absorption test)
The water absorption of the cool feeling cloth, the contrasting cloth 1 and the contrasting cloth 2 was measured according to the water absorption test method of JIS L 1907. The measurement result of the cool feeling cloth was 7 seconds. Further, the measurement results of the contrasting cloth 1 and the contrasting cloth 2 were 19 seconds and 1 second, respectively, suggesting that the back cloth quickly absorbs the water that has passed through the front cloth in the cool feeling cloth. It had good water absorption.

(Verification experiment of diffusible residual water content)
The mass (M ₀ ) of the cool dough was measured. Subsequently, the weight (M ₁ ) of the cool sensation dough to which 0.3 mL of water was dropped was measured. Then, the cool sensation fabric was hung. In this state, the weight (M ₂ ) of the cool sensation fabric was measured for each elapsed time, and the diffusible residual moisture content was determined by Equation 1. The above experiment was carried out in an environment of 20 ° C. and a humidity of 65%.
Diffusible residual water content (%) = {(M _2- M ₀ ) / (M _1- M ₀ )} × 100 ... (Equation 1)

As a result, the diffusible residual water content after 60 minutes was 28.5%.

From the results of water absorption and diffusible residual moisture content, it was found that the cool sensation fabric has excellent water absorption and quick-drying property. Under high temperature conditions such as summer, when wearing clothes made from ordinary denim fabric, stuffiness is likely to occur in the clothes, and the stuffiness causes discomfort, which makes it even more difficult for people wearing clothes. It becomes a factor that makes you feel the heat. However, since the cool fabric has excellent water absorption and quick-drying property, the stuffiness in the clothes is suppressed, and the cooler feeling can be felt.

(Verification of fluctuation rate of average friction coefficient)
The fluctuation rate of the average friction coefficient (Kawabata Evaluation System) based on the KES (Kawabata Evaluation System) method using the friction feeling tester (KES-SE) manufactured by Katou Tech Co., Ltd. with the cool feeling cloth and the back side of the contrast cloth 1 as the measurement surface. MMD) was measured. The texture and feel that a person feels when touching something is also called texture or smoothness, which is a subjective evaluation based on the human senses, and it is difficult to make an objective judgment. MMD is an objective quantification of the evaluation, and it can be said that the smaller the value, the smoother the surface and the better the texture.

The MMD of the cool dough was 0.0042, while the MMD of the contrasting dough 1 was 0.0537. The MMD of the cool feeling cloth was a very small value as compared with the contrast cloth. Therefore, the person who wears the clothes made from the cool feeling cloth feels comfortable to wear.

As described above, the cool feeling cloth of this example has good contact cold / warm feeling, heat shielding property, heat dissipation property, water absorption, diffusible residual moisture rate, ultraviolet shielding rate, and fluctuation rate of average friction coefficient. It can be seen that the cooler feeling can be felt by wearing clothes such as jeans made in use.

10 Cool fabric 11 Front fabric 12 Back fabric 13 Adhesive layer

Claims (6)

It is a cool fabric in which the front fabric and the back fabric are bonded together via an adhesive layer.
The lining fabric is a fabric composed of a functional yarn having at least one of an infrared reflector and a heat conductivity improving material.
A cool fabric that is characterized by that. The outer fabric is a denim fabric,
The cool feeling fabric according to claim 1. The lining fabric is a knitted fabric composed of the functional yarn.
The cool feeling fabric according to claim 1 or 2. The cool contact feeling measured under the condition of ΔT = 20 ° C. in the thermolab method is 0.4 W / cm ² or more.
The cool feeling fabric according to any one of claims 1 to 3, characterized in that. The cool contact feeling measured under the condition of ΔT = 10 ° C. in the thermolab method is 0.2 W / cm ² or more.
The cool feeling fabric according to any one of claims 1 to 3, characterized in that. It is composed of the cool feeling fabric according to any one of claims 1 to 5.
A cloth product that is characterized by that.

Images