JP2013180071A - Carpet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carpet having a pile yarn, a substrate cloth, and a backing layer, in which the backing layer contains a microcapsule filled with a cooling agent, and when a user sits on the carpet, the cooling agent is diffused from the microcapsule filled with the cooling agent, and the user sucks the diffused cooling agent and feels cool.SOLUTION: A carpet 1 has a pile yarn 2, a substrate cloth 3, and a backing layer 4. In the carpet, a microcapsule filled with a cooling agent is contained in the backing layer 4.

Description

  The present invention relates to a carpet having a refreshing sensation, and relates to a carpet in which a person feels coolness when sitting on or touching the surface of the carpet.

  In Japanese homes, carpets are used frequently throughout the year, and many families relax by sitting or lying on the carpet. Carpets are required to be warm in the winter and cool and refreshing in the summer. Although carpets having these contradictory properties have not yet existed, it is common to replace carpets having different properties in winter and summer. Especially in summer, the carpet is often covered with cotton carpet with good water absorption such as sweat, rush and rattan rugs to overcome the heat of summer.

  In Patent Document 1, by laminating a phase-change material-containing sheet and a sheet-like three-dimensional structure that ensures air permeability, temperature rise when contacting a human body or the like is suppressed, and an excellent cool feeling is given. Possible summer mattresses and mattresses have been proposed.

  Further, in Patent Document 2, a latent heat storage material having a melting point of 25 to 37 ° C. and reversibly undergoing solid-liquid phase transition with the release / absorption of latent heat is used in order to impart excellent contact cooling feeling to the fiber product. A technique is disclosed in which the encapsulated microcapsules are fixed to fibers to give a pleasant cooling feeling when contacting the skin and to reduce discomfort due to heat.

  However, these technologies are technologies that use a latent heat storage material to give a refreshing feeling to the surface of thin fibers such as clothing and bedding. A large fiber assembly has a large heat-retaining effect, and has not yet reached a technology that can provide a cool and cool feeling as a carpet.

In the patent document 3, the applicant has proposed a carpet that surely feels cool and cool by fixing a microcapsule enclosing a phase change material to the entire pile yarn from the base fabric. However, further improvement in cool feeling has been desired.
JP 2005-343093 A JP 2006-161226 A JP 2008-285803 A

  The present invention has been made in view of such a technical background, and a person can feel a refreshing feeling by sitting on the surface of the carpet. The purpose is to provide a carpet that can feel cool and cool.

  As a result of intensive studies to solve such problems, the present inventors have included a microcapsule in which a cooling sensation agent is enclosed in the backing layer in a carpet having a pile yarn, a base fabric, and a backing layer. By allowing the person to sit on the carpet surface, the cooling sensation agent is released from the microcapsules encapsulating the cooling sensation agent, and the person sucks the chilled sensation agent to give a refreshing feeling. The inventors have found that a carpet that can be felt is obtained, and the present invention has been achieved. In order to achieve the above object, the present invention provides the following means.

  [1] A carpet characterized in that a carpet having a pile yarn, a base fabric, and a backing layer contains microcapsules in which a cooling agent is encapsulated in the backing layer.

  [2] The carpet according to item 1 above, wherein the microcapsules enclosing the cooling sensation agent are contained in the backing layer in an amount of 1.5% by mass to 10% by mass.

  [3] A carpet characterized in that in a carpet having a pile yarn, a base fabric, and a backing layer, microcapsules enclosing a cooling agent are fixed to at least a part of the base fabric.

[4] The carpet according to item 3 above, wherein the microcapsules enclosing the cooling sensation agent are fixed to the base fabric with 0.5 to 3.5 g / m ² binder resin.

  [5] Any one of items 1 to 4 above, wherein a microcapsule enclosing a phase change material having a melting point of 20 to 35 ° C. and having two or more melting points is fixed to the pile yarn and / or the surface of the base fabric. Carpet according to item.

[6] The carpet according to item 5 above, wherein the microcapsules enclosing the phase change material are fixed to the carpet with 0.50 to 50.0 g / m ² binder resin.

  In the invention of [1], the carpet having a pile yarn, a base fabric, and a backing layer contains microcapsules in which a cooling sensation agent is sealed in the backing layer, so that a person can sit on the surface of the carpet. By doing so, the cooling sensation agent is further diffused from the microcapsules enclosing the cooling sensation agent, and the person can feel a refreshing sensation by sucking the dissipated cooling sensation agent.

  In the invention of [2], since the microcapsule enclosing the cooling sensation agent is contained in the backing layer in an amount of 1.5% by mass to 10% by mass, the microcapsule encapsulating the cooling sensation agent is used for cooling sensation agent. Are gradually released without being released in large quantities at once.

  In the invention of [3], in a carpet having a pile yarn, a base fabric, and a backing layer, the microcapsules enclosing the cooling sensate are fixed to at least a part of the base fabric, so that the skin touches By doing so, the cooling sensation agent is further diffused from the microcapsules enclosing the cooling sensation agent, and the person can feel a refreshing sensation by sucking the dissipated cooling sensation agent.

In the invention of [4], since the microcapsules encapsulating the cooling sensation agent are fixed to the base fabric with a binder resin of 0.5 to 3.5 g / m ² , a person may feel a refreshing feeling sufficiently. it can.

  In the invention of [5], since a microcapsule enclosing a phase change material having a melting point of 20 to 35 ° C. and having two or more melting points is fixed to the pile yarn and / or the surface of the base fabric, When touching the pile yarn on the carpet surface and / or touching the carpet base fabric, a cool coolness can be felt. Moreover, even if the temperature reaches the melting point of one phase change material, the phase change material having the other melting point remains unmelted and remains when the human body comes into contact with the carpet. Melts, and then the heat of fusion moves from the human body, and the person can feel the carpet cold.

In the invention of [6], since the microcapsules enclosing the phase change material are fixed to the carpet with a binder resin of 0.50 to 50.0 g / m ² , the carpet should have a sufficient cool feeling ability. Can do.

It is explanatory drawing which shows one Embodiment of the carpet which concerns on this invention.

  Next, an embodiment of the carpet according to the present invention is shown in FIG. The carpet 1 of this embodiment is a carpet having a pile yarn 2, a base fabric 3, and a backing layer 4, and contains microcapsules (not shown) in which a cooling agent is enclosed in the backing layer 4. Further, for example, when the carpet has rough stitches and is light in weight, when the person rides on the carpet and puts his / her limbs, the skin may also come into contact with the base cloth 3, so that the surface of the base cloth 3 has a cooling agent. A microcapsule (not shown) in which is encapsulated is fixed. In FIG. 1, a second base fabric 5 made of a nonwoven fabric is laminated in order to protect the backing layer 4 and provide cushioning properties.

  Although it does not specifically limit as a cooling sensation agent used by this invention, For example, although menthol, mint oil, peppermint oil, spare mint oil, etc. can be mentioned, you may use combining these two or more.

  The microcapsules that enclose the cooling sensation agent are preferably organic microcapsules, and examples thereof include, but are not limited to, polystyrene, ethylene cellulose, polyamide, polyacrylic acid, melamine, urethane, and silicone resin. The average particle size of the microcapsules is not particularly limited, but is preferably from 0.1 to 20 μm from the viewpoint of dispersibility in a processing liquid and the like and suppressing unnecessary breakage of the microcapsules.

  In the present invention, the backing layer 4 can be formed by applying a backing agent in which microcapsules encapsulating a cooling sensation agent are dispersed to the lower surface of the base fabric 3 by a known method, followed by drying curing. The backing agent is one or more selected from the group consisting of calcium carbonate, silicon dioxide, zinc oxide and talc as an inorganic material in a resin composition or rubber composition that can fix the pile yarn 2 and the base fabric 3. Is generally contained in an amount of 50 parts by mass or more based on 100 parts by mass of the resin composition or the rubber composition latex. In the present invention, it is a backing agent in which microcapsules encapsulating a cooling agent are uniformly dispersed. The resin composition or the rubber composition is not particularly limited as long as it is a resin composition or a rubber composition that can fix the pile yarn 2 and the base fabric 3, and examples of the resin component of the resin composition include acrylic and urethane. And resins such as polyvinyl chloride, polyethylene, polypropylene, and ethylene-vinyl acetate copolymer (EVA). Examples of the rubber component of the rubber composition include SBR (styrene-butadiene), NBR (acrylonitrile-butadiene rubber), MBR (methyl methacrylate-butadiene rubber), and natural rubber. In addition, a dispersing agent, an antifoamer, a thickener, a preservative, a pigment, etc. are suitably contained in the backing agent.

  It is preferable that a microcapsule in which a cooling agent is encapsulated in the backing layer 4 is contained in an amount of 1.5 mass% to 10 mass% with respect to the backing layer 4. If it is less than 1.5% by mass, the cooling agent is less diffused and the refreshing feeling may be weakened. Exceeding 10% by mass is not preferable because it increases the cost of materials.

  The base fabric 3 is not particularly limited, and may be a commonly used base fabric such as a woven fabric, a knitted base fabric, or a nonwoven fabric made of natural fibers such as polyester fiber, polypropylene fiber, hemp, and cotton. The base fabric is a preferable material also in the present invention because of its excellent water absorption.

  As the binder resin, it is sufficient that the microcapsules enclosing the cooling sensation agent can be firmly fixed to the base cloth 3, but generally, for example, urethane resin, self-crosslinking acrylic resin, methacrylic resin, silicon resin, and the like. , Glyoxal resin, polyester resin, vinyl acetate resin, vinylidene chloride resin, butadiene resin, melamine resin, epoxy resin, acrylic-silicone copolymer resin, styrene-butadiene copolymer resin (SBR), ethylene-vinyl acetate copolymer Examples thereof include a resin (EVA), an isobutylene maleic anhydride copolymer resin, and an ethylene-styrene-acrylate-methacrylate copolymer resin.

The method of fixing the microcapsules encapsulating the cooling sensation to the base fabric 3 is to disperse the microcapsules encapsulating the cooling sensation agent uniformly in the binder resin solution, and using a conventional method such as a spray method or a coating method. 3 is sufficiently applied to the base fabric 3 and fixed to the base fabric 3 by drying. A penetrant may be mixed in the binder resin solution. The drying means for the binder resin is preferably dried by heat treatment, and the heat treatment temperature at this time is preferably 100 to 180 ° C., although it depends on the material and specifications. By heat treatment at this temperature, the adhesion to the base fabric 3 is further increased, and the durability is further improved. It is preferable that the microcapsules enclosing the cooling sensation agent are fixed to the base fabric 3 with 0.5 to 3.5 g / m ² binder resin. If it is less than 0.5 g / m ² , the cooling agent is less diffused and the refreshing feeling may be weak, which is not preferable. If it exceeds 3.5 g / m ² , the cost of the material will increase undesirably.

  In this invention, it does not specifically limit as a raw material of the pile thread | yarn 2, What consists of synthetic fibers, such as a polyester fiber, a polyamide fiber, a polypropylene fiber, an acrylic fiber, rayon fiber, etc. can be used conveniently, Other hemp, cotton Also, those made of natural fibers such as wool can be used. The pile may be a cut pile or a loop pile, but the loop pile tends to feel a refreshing feeling. The basis weight of the pile yarn 2 is not particularly limited as long as it forms a carpet.

  A phase change material (PCM) is a material that is repeatedly converted between a solid phase and a liquid phase, and uses heat generated when melting and solidifying to accumulate or release the heat, thereby surrounding the phase change material. The temperature is controlled. As the phase change material, hydrocarbon compounds such as paraffin and wax are preferably used, but are not particularly limited. Microcapsules encapsulating the phase change material are commercially available, and examples include prethermo manufactured by Daiwa Chemical Industry Co., Ltd., heat storage cold storage microcapsules manufactured by Miki Riken Kogyo Co., Ltd., and the composition of the microcapsules is also particularly limited. It is not necessary to use a commercially available product.

  The microcapsules encapsulating the phase change material used in the present invention preferably have a heat absorption peak temperature (also referred to as melting point) or a heat dissipation peak temperature (also referred to as freezing point) in the range of 20 to 35 ° C. Although the human body temperature is 36-37 ° C, the surface temperature of the hands and feet is said to be lower than this, 32-34 ° C, so the phase that becomes the peak temperature (melting point) of heat absorption at 20-35 ° C. Transition materials are preferred. A more preferable peak temperature (melting point) is 25 to 32 ° C.

  When the peak temperature of heat absorption is too low, the phase transition material has already melted before the human body comes into contact, and even if the human body comes into contact, a cool feeling effect cannot be obtained. Moreover, when the peak temperature of heat absorption is too high, even if a human body comes into contact, the phase transition material does not melt, so that the coldness cannot be felt.

  When the carpet of the present invention is used in a room having a high room temperature, a phase change material having two or more melting points is effective. For example, when a microcapsule enclosing a phase change material having two melting points of 25 ° C. and 32 ° C. is fixed to the pile yarn 2 and the base fabric 3 at a ratio of 50:50, When the room temperature is 20 ° C., a phase transition material having a melting point of 25 ° C. works effectively and a cool feeling effect can be obtained. When the room temperature rises to 30 ° C. in the afternoon, the phase transition material having a low melting point has already melted, and only the effect of the phase transition material having a melting point of 32 ° C. can be obtained. When all are composed of a phase change material having a melting point of 25 ° C., it can feel cold in the morning, but not in the afternoon at all. In addition, when all of the phase transition materials having a melting point of 32 ° C. are used, the temperature difference between the room temperature and the melting point is large, and almost no cooling can be felt, but in the afternoon when the temperature difference between the room temperature and the melting point is small. You will feel cold.

The microcapsules enclosing the phase change material are preferably fixed to the surface of the carpet pile yarn 2 and / or the base fabric 3 with 0.50 to 50.0 g / m ² binder resin. If it is less than 0.50 g / m ² , the coldness cannot be felt. Moreover, even if it exceeds 50.0 g / m < ² >, the feel of a carpet will become hard and it will only increase cost, and it is not preferable. More preferably, a fixed amount of 1 to 20.0 g / m ² is good.

  The particle size of the microcapsules enclosing the phase change material is preferably 1 to 50 μm. If it exceeds 50 μm, a feeling of roughness and hardness will be manifested, and the carpet will not have a preferred texture. A more preferable particle size is 5 to 25 μm.

In addition, as shown in FIG. 1, a second base fabric 5 made of a nonwoven fabric may be provided below the backing layer 4 in order to provide cushion performance and protection performance for the backing layer 4. It does not specifically limit as the second base fabric 5, A needle punch nonwoven fabric, a spunbond nonwoven fabric, etc. can be illustrated. The basis weight of the second base fabric 5 is preferably 50 to 1000 g / m ² , the thickness is set to 0.5 to 15 mm, and the fineness of the constituent fibers is preferably set to a range of 0.1 to 30 dtex. If the basis weight of the second base fabric 5 is less than 50 g / m ² , the function and quality of the carpet are inferior, which is not preferable. If it exceeds 1000 g / m ² , the cost will increase unnecessarily. The material is not particularly limited like the pile yarn 2 and the base fabric 3. Further, an anti-slip layer may be formed on the lowermost surface of the second base fabric 5 with a resin composition or a rubber composition.

  Next, the material and structure of the carpet used as an embodiment of the present invention, the type of microcapsules enclosing the cooling agent, the type of microcapsules enclosing the phase change material, the processing method, and the sensory evaluation test method are as follows: Street.

<Materials used>
Pile yarn: pile yarn made of polyester fiber is planted in a loop with a tufting machine (1 / 8G) (pile length 5.0 mm, basis weight 500 g / m ² )
Base fabric: basis weight 100g / m ² polypropylene tape yarn woven fabric (14 x 13)
Second base fabric: Needle punched nonwoven fabric made of 5 dtex polyester fiber (300 g / m ² basis weight, thickness 6 mm)
Microcapsules encapsulating a cooling agent ... Microcolon HV-U (Daiwa Chemical Industry Co., Ltd.) mint Microcapsules enclosing phase transition material ... Prethermo (Daiwa Chemical Industry Co., Ltd.) Melting point 25 ° C and melting point Two types of binder resin at 31 ° C: Acrylic-silicone copolymer resin “Light Epoch”

<Example 1>
On the back side (base fabric side) of the carpet skin layer, 100 parts by mass of SBR latex (containing 50% by mass of SBR), 400 parts by mass of calcium carbonate, and microcapsules (encapsulated with mint, 35% solid content) encapsulating a cooling sensation agent. The backing agent mixed with 20 parts by mass was wet-coated by a roller coating method at 700 g / m ^2, and then a second base fabric was laminated on the backing agent surface and dried at 120 ° C. for 10 minutes to obtain a carpet. The backing layer contained 9.4% of microcapsules enclosing a cooling agent. As a result of the sensory evaluation test, all 10 people answered that there was a refreshing refreshing feeling.

<Comparative Example 1>
A carpet was obtained in the same manner as in Example 1 except that a backing agent not mixed with microcapsules encapsulating a cooling sensation agent (encapsulating mint, solid content 35%) was used. A carpet to be compared in the sensory evaluation test was used.

<Example 2>
In Example 1, a carpet was obtained in the same manner as in Example 1 except that a backing agent in which 10 parts by mass of microcapsules encapsulating a cooling sensation agent (encapsulating mint, solid content 35%) was used was used. The backing layer contained 4.8% of microcapsules enclosing a cooling agent. As a result of the sensory evaluation test, 9 people answered that there was a refreshing refreshing feeling.

<Example 3>
Disperse 4 parts by mass of microcapsules containing chilling sensation agent in 100 parts by mass of water (encapsulated with mint, 35% solid content), and then spray an aqueous solution in which 6 parts by mass of binder resin is dispersed on the surface of the base fabric. 125 g / m ^{2 was} applied and dried at 120 ° C. for 10 minutes. The same backing agent as that of Comparative Example 1 was used for the carpet skin layer to which the pile yarn was tufted on the base fabric in which the microcapsules encapsulating the cooling sensation agent thus obtained were fixed to 1.6 g / m ^2. A carpet was obtained in the same manner as in Example 1. As a result of the sensory evaluation test, 8 people answered that there was a refreshing refreshing feeling.

<Example 4>
In Example 3, the procedure was carried out except that a base fabric having 3.2 g / m ² fixed microcapsules (seaweed encapsulated, solid content 35%) coated with 250 g / m ^{2 on the} surface of the base fabric was used. A carpet was obtained in the same manner as in Example 3. As a result of the sensory evaluation test, 9 people answered that there was a refreshing refreshing feeling.

<Example 5>
A carpet was obtained in the same manner as in Example 1 except that the base fabric of Example 3 was used. As a result of the sensory evaluation test, 10 persons answered that there was a refreshing refreshing feeling.

<Example 6>
After dispersing 25 parts by mass of a microcapsule dispersion liquid (sealed with paraffin, melting point 25 ° C., solid content 40%) in which 100 parts by mass of water is encapsulated in a phase change material, an aqueous solution in which 25 parts by mass of a binder resin is dispersed is sprayed. Apply 125 g / m ^{2 on the} surface of the base fabric, dry at 120 ° C. for 10 minutes, and tough the pile yarn on the base fabric with 8 g / m ^{2 of} microcapsules encapsulating the phase change material on the base fabric. A carpet was obtained in the same manner as in Example 1 except that the coated carpet skin layer was used. As a result of the sensory evaluation test, 10 people answered that they had a refreshing and refreshing feeling.

<Example 7>
After dispersing 50 parts by mass of a microcapsule dispersion (paraffin-encapsulated, melting point: 25 ° C., solid content: 40%) in which a phase change material is encapsulated in 100 parts by mass of water on the carpet surface obtained in Example 1, An aqueous solution in which 50 parts by mass of the binder resin is dispersed is applied by spraying 250 g / m ² from the surface of the carpet pile, dried at 120 ° C. for 10 minutes, and 25 g / m of microcapsules enclosing the phase change material on the carpet. ^{2 A} fixed carpet was obtained. As a result of the sensory evaluation test, 10 people answered that they had a refreshing and refreshing feeling.

<Example 8>
A microcapsule dispersion in which 2 parts by mass of microcapsules in which 100 parts by mass of cooling agent is encapsulated with a cooling sensation agent (encapsulated in mint, 35% solids) and a phase-change material are encapsulated (paraffin encapsulated, melting point 25 ° C., 40% in solids) After 5 parts by mass were dispersed, an aqueous solution in which 6 parts by mass of the binder resin was dispersed was applied to the surface of the base fabric by spraying at 125 g / m ^{2 and} dried at 120 ° C. for 10 minutes. Example 1 except that a microcapsule encapsulating the cooling agent thus obtained was fixed at 0.8 g / m ² and a microcapsule encapsulating a phase change material was fixed at 2.2 g / m ^2. A microcapsule in which the aqueous solution used in Example 7 was applied by spraying 250 g / m ² on the carpet surface obtained in the same manner as described above and dried at 120 ° C. for 10 minutes, and the phase change material was sealed on the carpet. Of 25 g / m ² was obtained. As a result of the sensory evaluation test, 10 people answered that they had a refreshing and refreshing feeling.

  As described above, the carpets of Examples 1 to 8 of the present invention were carpets that clearly felt a refreshing feeling as compared with the unprocessed Comparative Example 1.

<Cool sensory evaluation>
Sensory evaluation: With respect to the carpet of Comparative Example 1, the presence or absence of a refreshing feeling was evaluated by a paired comparison method. The number of subjects was 10, and 80% or more of people felt refreshing as a pass. (Evaluated in a standard room with temperature 20 ° C and humidity 65%)

  For example, it can be suitably used as a carpet that allows a person to sit on or touch the surface of the carpet and feel refreshed and cool.

DESCRIPTION OF SYMBOLS 1 ... Carpet 2 ... Pile yarn 3 ... Base fabric 4 ... Backing layer 5 ... Second base fabric

Claims (6)

  A carpet having a pile yarn, a base fabric, and a backing layer, wherein the backing layer contains microcapsules encapsulating a cooling agent.   The carpet according to claim 1, wherein the microcapsules in which the cooling agent is encapsulated are contained in the backing layer in an amount of 1.5 mass% to 10 mass%.   A carpet characterized in that, in a carpet having a pile yarn, a base fabric, and a backing layer, microcapsules enclosing a cooling agent are fixed to at least a part of the base fabric. The carpet according to claim 3, wherein the microcapsules enclosing the cooling sensation agent are fixed to the base fabric with a binder resin of 0.5 to 3.5 g / m ² .   5. The microcapsule in which a phase change material having a melting point of 20 to 35 ° C. and having two or more melting points is fixed to the pile yarn and / or the surface of the base fabric according to claim 1. The listed carpet. The carpet according to claim 5, wherein the microcapsules enclosing the phase change material are fixed to the carpet with 0.50 to 50.0 g / m ² binder resin.

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