JP5377248B2 - Cool carpet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carpet for summer which ensures the actual feeling of refreshing coolness when a person comes into contact with the surface thereof, and also has reduced free formalin which may emit from microcapsules encapsulated with a phase-transition material therein. <P>SOLUTION: The carpet is configured such that: microcapsules encapsulated with a phase-transition material and a urea-based moisture-absorbing material are stuck on the surface side of a carpet foundation fabric and the whole pile yarns on and above the foundation fabric. Thus, the objective carpet for summer thus obtained, ensures the actual feeling of refreshing coolness when a person comes into contact with the surface thereof, and also is reduced in free formalin which may emit from the microcapsules encapsulated with a phase-transition material. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a refreshing carpet, and more particularly to a summer carpet that allows a person to feel a cool coolness when 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. In summer, in particular, as a carpet for summer, a cotton carpet with good water absorption such as sweat, rush and rattan rugs are often laid to surpass the heat of summer.

  In Patent Document 1, in order to obtain a carpet with a refreshing and refreshing feeling, a flatness of polylactic acid composed of polylactic acid fibers having a flatness of 3 to 8 and a fineness of the single fiber of 5 to 25 dtex is obtained. Carpets using crimped yarn have been proposed.

  Moreover, in patent document 2, what supported the composite of the substance with a negative heat of hydration and a specific inorganic compound on the cloth is excellent in coolness, and is useful technology for summer clothes, towels, etc. Proposed.

Moreover, in patent document 3, the temperature rise at the time of contact | connecting a human body etc. is suppressed by laminating | stacking a phase-change-substance containing sheet | seat and the sheet-like solid structure with which air permeability was ensured, and gives the outstanding cool feeling. Summer mattresses and mattresses that can be used have been proposed.

  Further, in Patent Document 4, a latent heat storage material having a melting point of 25 to 37 ° C. and reversibly undergoing solid-liquid phase transition with release / absorption of latent heat in order to impart excellent contact cooling sensation to the textile product. A technique for giving a pleasant cooling feeling when contacting the skin and fixing discomfort due to heat by fixing the encapsulated microcapsules is disclosed. However, these technologies are carpet technologies that give the fiber form a special flat shape to give a smooth feeling, or technologies that use a latent heat storage material to give a refreshing feeling to the surface of thin fibers such as clothing. However, a carpet that is thick and contains a lot of air and has a large heat insulation effect has a large heat insulation effect, so it has reached a technology that can provide a cool and cool feeling as a carpet. Not.

In the patent document 5, the applicant proposed a cool carpet characterized in that a microcapsule in which a phase change material is sealed is fixed to a pile yarn from the surface of the base fabric to the upper pile yarn. Proposed a cool carpet characterized by using pile yarn in which microcapsules in which a phase change material is encapsulated in advance are fixed to the entire pile yarn. Furthermore, Patent Document 7 proposes a cool feeling carpet characterized in that a microcapsule in which a phase change material is sealed is fixed to a pile yarn including a flat yarn. However, it is possible to further improve the cool feeling performance. It is desired.
In addition, a commercially available microcapsule encapsulating a phase change material is made of melamine resin, and when processed, free formalin is generated, which may adversely affect the human body.
JP-A-2005-48303 JP 2004-115964 A JP 2005-343093 A JP 2006-161226 A Japanese Patent Application No. 2007-213522 Japanese Patent Application No. 2008-262957 Japanese Patent Application No. 2008-316317

  The present invention has been made in view of such a technical background. When a person touches the surface of a carpet, the present invention can surely feel coolness, and further, a microcapsule enclosing a phase change material. An object of the present invention is to provide a summer carpet in which free formalin generated from water is reduced.

  As a result of intensive studies to solve such problems, the present inventors have used a microcapsule encapsulating a phase change material and a urea-based hygroscopic agent in combination, and the surface side of the base fabric, and the upper side from the base fabric. By sticking to the entire pile yarn, when a person touches the surface of the carpet, it can be sure to feel cool and cool, and the free formalin generated from the microcapsules encapsulating the phase change material has been reduced. The present invention has been found out that a carpet for use is obtained. In order to achieve the above object, the present invention provides the following means.

[1] In a carpet including a skin layer made of a pile yarn and a base fabric, and a backing layer, a microcapsule in which a phase change material is sealed and a urea-based moisture absorbent are fixed to the pile yarn on the base fabric. A cool carpet with a special characteristic.

[2] A microcapsule in which a phase change material is enclosed in a pile yarn on a surface of a base fabric and a pile yarn above the base fabric in a carpet including a skin layer made of a pile yarn and a base fabric, and a backing layer, and a urea-based moisture absorbent A cool carpet characterized by the fact that it is fixed.

[3] The cool-feeling carpet according to item 1 or 2, wherein the phase change material is a phase change material having a melting point of 20 to 35 ° C. and encapsulated in microcapsules.

  [4] The cool carpet according to any one of the preceding items 1 or 2, wherein the urea-based hygroscopic agent contains a urea-based compound composed of at least one of urea, ethylene urea, and thiourea.

[5] The phase change material according to item 1 or 2, wherein the phase change material is a phase change material having a melting point of 20 to 35 ° C. and encapsulated in a microcapsule and having two or more melting points. Cool feeling carpet described in 1.

[6] The microcapsules encapsulating the phase change material are fixed to the carpet with at least 0.50 to 50.0 g / m ² binder resin, according to any one of items 1 to 5 above, Cool carpet.

[7] The cool carpet according to any one of items 1 to 6 above, wherein the urea-based moisture absorbent is fixed to the carpet with at least 0.50 to 40.0 g / m ² binder resin. .

[8] The cool feeling carpet according to any one of the above items 1 to 7, wherein the cool feeling carpet is constituted by a pile yarn including at least cotton.

[9] The cool feeling carpet according to any one of the above items 1 to 7, characterized in that in the cool feeling carpet, the pile yarn is constituted by a pile yarn containing at least 10% non-crimped yarn.

[10] The cool feeling carpet according to any one of items 1 to 7, wherein the cool feeling carpet is constituted by a pile yarn containing at least 10% of rayon yarn.

[11] In any one of the above items 1 to 10, wherein the cool carpet has a QMAX (contact thermal cool value) at 28 ° C. of greater than 0.075 j / cm ² · sec. The cool carpet described.

In the invention of [1], in a carpet including a skin layer composed of a pile yarn and a base fabric, and a backing layer, a microcapsule in which a phase change material is enclosed in a pile yarn above the base fabric and a urea-based hygroscopic agent Since it is fixed, when a person touches the pile yarn on the carpet surface, it feels cool, and free formalin generated from the microcapsules enclosing the phase change material can be reduced.

In the invention of [2], in a carpet including a skin layer made of a pile yarn and a base fabric, and a backing layer, a microcapsule in which a phase change material is enclosed in the surface of the base fabric and the pile yarn above the base fabric, The urea-based hygroscopic agent is fixed, so that no matter where the person touches the carpet surface, it feels cool and reduces the free formalin generated from the microcapsules encapsulating the phase change material. Can do.

In the invention of [3], since the phase transition material having a melting point of 20 to 35 ° C. is sealed in the microcapsule and fixed to the carpet, the phase transition material is melted when the human body comes into contact with the carpet. At that time, the heat of fusion moves from the human body, and the person can feel the carpet cold.

  In the invention of [4], since the urea-based hygroscopic agent contains urea-based compounds of urea, ethylene urea, and thiourea, free formalin released from the melamine resin microcapsules enclosing the phase change material is removed. In addition to being able to reduce, when the heat of the human body is conducted to the moisture absorbed by the hygroscopic action of the urea-based compound and the human body comes into contact with the carpet, the human can feel the carpet cold.

In the invention of [5], in the phase change material having a melting point of 20 to 35 ° C. and encapsulated in the microcapsule, the phase change material having two or more melting points is encapsulated in the microcapsule and fixed to the carpet. Therefore, 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. The transition material melts, at which time the heat of fusion occurs from the human body and the person can feel the carpet cold.

[6] Since the microcapsules enclosing the phase change material are fixed to the carpet by at least 0.50 to 50.0 g / m ² binder resin, the carpet can have a sufficient cool feeling ability. .

[7] Since the urea-based hygroscopic agent is fixed to the carpet by at least 0.50 to 40.0 g / m ² binder resin, free formalin generated from the microcapsules enclosing the phase change material is reduced. It can be made into a carpet with a cool feeling ability.

In the invention of [8], since the pile yarn is constituted by a pile yarn containing at least cotton, since the moisture absorbent cotton fiber takes moisture such as sweat of the human body, can do.

In the invention of [9], since the pile yarn is composed of a pile yarn containing at least 10% of non-crimped yarn, the air that stops in the pile yarn is reduced, and the human touch is felt from the form of the yarn. Since it feels cooler than the crimped yarn, the carpet can be made smooth and cool.

In the invention of [10], since the pile yarn is composed of a pile yarn containing at least 10% of rayon yarn, the hygroscopic rayon fiber takes moisture such as sweat of the human body. Even a smooth and cool carpet.

In the invention of [11], since the QMAX (contact thermal sensation value) at 28 ° C. is greater than 0.075 j / cm ² · sec, the sensation of cooling is surely felt when the skin comes into contact with the carpet. Can do.

  Next, an embodiment of a cool carpet according to the present invention will be described with reference to the drawings. The cool carpet 1 of this embodiment includes a pile yarn 2, a base fabric 3, and a backing layer 4, and a microcapsule 6 in which a phase change material is sealed on the entire pile yarn 2 and the pile yarn side surface of the base fabric 3 and a urea system. The hygroscopic agent 7 is fixed by a binder resin (not shown). (See Fig. 1) The carpet for summer has a lower pile length than that for winter, and there is a tendency for the stitches to be coarse and light. Therefore, when a person touches the carpet, the pile yarn 2 Since the skin may come into contact with the base fabric 3 as well, the microcapsule 6 in which the phase change material is sealed in the surface of the base fabric 3 and the pile yarn 2 above the base fabric 3 and the urea-based moisture absorption are shown in FIG. Agent 7 is fixed. Moreover, in FIG. 1, in order to provide protection and cushioning properties for the backing layer 4, a second base fabric 5 made of a nonwoven fabric is laminated.

  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. The microcapsules 6 enclosing the phase change material are commercially available, and examples include prethermo manufactured by Daiwa Chemical Industry Co., Ltd., heat storage and cold storage microcapsules manufactured by Miki Riken Kogyo Co., Ltd. It is not limited and what is generally marketed may be used.

  The microcapsule 6 encapsulating the phase change material used in the present invention preferably has a heat absorption peak temperature (also referred to as a melting point) or a heat dissipation peak temperature (also referred to as a 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. In addition, when the peak temperature of heat absorption is too high, even if a human body comes into contact, the phase change material does not melt, so that a cool feeling effect cannot be obtained.

  The urea-based hygroscopic agent 7 used in the present invention may be any of urea, ethylene urea, and thiourea compounds, and reduces free formalin released from the melamine resin microcapsules 6 enclosing the phase change material. In addition, the heat of the human body is conducted to the moisture absorbed by the hygroscopic action of the urea compound, and combined with the effect of the endothermic action of the microcapsule 6 enclosing the phase change material, an unexpected cool feeling effect Can be obtained.

  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 the microcapsules 6 enclosing phase change materials having two melting points of 25 ° C. and 32 ° C. are fixed to the pile yarn 2 and the base fabric 3 at a ratio of 50:50, the morning of the summer day When the room temperature is 20 ° C., the 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., a cool feeling can be felt in the morning, but not in the afternoon at all. In addition, when all of the phase change materials having a melting point of 32 ° C. are used, the temperature difference between the room temperature and the melting point is large in the morning, and a cooling effect is hardly obtained, but the temperature difference between the room temperature and the melting point is small in the afternoon. You will feel cool.

The microcapsule 6 enclosing the phase change material is preferably fixed to the surface of the carpet base fabric 3 and the pile yarn 2 above the base fabric 3 with at least 0.50 to 50.0 g / m ² binder resin. If it is less than 0.50 g / m ² , a cool feeling effect 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 microcapsule 6 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.

The urea-based moisture absorbent 7 is preferably fixed to the surface of the carpet base fabric 3 and the pile yarn 2 above the base fabric 3 with at least 0.50 to 40.0 g / m ² binder resin. Weak effect of reducing the free formaldehyde falls below 0.50 g / ^{m 2,} also be secured beyond the 40.0 g / ^{m 2,} not desirable without the effect commensurate with the cost increase. More preferably, a fixed amount of 1.0 to 30.0 g / m ² is good.

  The binder resin only needs to be able to firmly fix the microcapsules 6 and the urea-based hygroscopic agent 7 in which the phase change material is sealed on the surface of the pile yarn 2 and the base fabric 3. Self-crosslinking acrylic resin, methacrylic resin, silicon resin, glyoxal resin, polyester resin, vinyl acetate resin, vinylidene chloride resin, butadiene resin, melamine resin, epoxy resin, acrylic-silicone copolymer resin, styrene-butadiene copolymer Examples thereof include a combined resin (SBR), an ethylene-vinyl acetate copolymer resin (EVA), an isobutylene maleic anhydride copolymer resin, and an ethylene-styrene-acrylate-methacrylate copolymer resin.

  The method of fixing the microcapsule 6 encapsulating the phase change material and the urea-based hygroscopic agent 7 on the surface of the pile yarn 2 and the base fabric 3 is as follows. The surface of the pile yarn 2 and the base fabric 3 is uniformly dispersed from the upper side of the pile yarn 2 onto the pile yarn side of the carpet by a conventional method such as spraying or coating, and the moisture absorbent 7 is uniformly dispersed. It sticks to. At this time, if the penetrant is not mixed, the treatment liquid stays on the surface of the pile yarn 2, and the treatment liquid does not reach the vicinity of the root of the pile yarn 2. Therefore, it is preferable to use the penetrant appropriately. The drying means for the binder resin is preferably dried by heat treatment, and is efficient when performed simultaneously with the drying process of the backing layer 4. The heat treatment temperature at this time is preferably 100 to 180 ° C., although it depends on the materials and standards of the pile yarn 2, the base fabric 3, and the backing layer 4. By heat treatment at this temperature, the adhesiveness to the pile yarn 2 is further increased, and the durability is further improved.

  Moreover, the microcapsule 6 enclosing the phase change material, the urea-based moisture absorbent 7, the penetrant, and the binder resin can be used as an aqueous dispersion dispersed in water. The binder resin is more preferably formed into an emulsion state with water. As the dispersion medium, alcohol or the like can be used in addition to water, but water is preferred. The order of dispersing in water is to disperse the penetrant and binder resin after the microcapsule 6 and urea-based hygroscopic agent 7 enclosing the phase change material are dispersed in water, and then encapsulating the phase change material. This is preferable from the viewpoint of more uniformly dispersing the microcapsules 6, the urea-based moisture absorbent 7 and the binder resin. Moreover, you may mix | blend various additives, such as a dispersing agent and a thickener, with this aqueous dispersion.

  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. Since cotton or rayon fiber is excellent in water absorption, it is often used in summer carpets. Also in the present invention, microcapsules in which cotton fiber or rayon fiber with good hygroscopicity encapsulates a phase change material. Combined with the effect of No. 6, the carpet can be made smooth and cool. In addition, the carpet pile yarn is often crimped in order to impart bulkiness, but in the present invention, it is desirable to incorporate non-crimped yarn. Since the non-crimped yarn feels cooler than the crimped yarn when touched by hand, it is preferably constituted by a pile yarn containing at least 10% of the non-crimped yarn. If the non-crimped yarn is less than 10%, it is difficult to feel the effect, and the mixing amount may be determined in accordance with the carpet standard. If 100% non-crimped yarn is used, the effect is great. However, since the carpet appears thin, it is preferable to mix the crimped yarn and the non-crimped yarn. The pile yarn 2 may be a cut pile or a loop pile, but the loop pile has a cooler feeling. The basis weight of the pile yarn 2 is not particularly limited as long as it forms a carpet.

  Further, 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, and a nonwoven fabric made of natural fibers such as polyester fiber, polypropylene fiber, hemp, and cotton. Cotton base fabrics are often used in carpet base fabrics for summer because of their excellent water absorption, and are also preferred materials in the present invention.

  QMAX stores heat in a pure copper plate (heat capacity 0.41855j / ° C) with a constant area and a constant mass, and immediately after it contacts the sample surface, the stored heat amount moves to the low-temperature sample object. The larger the QMAX, the colder it feels when touched, and the smaller the QMAX, the warmer it feels.

  Next, the backing layer 4 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. For example, the resin component of the resin composition may be acrylic, urethane, Examples thereof include 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 general, calcium carbonate, aluminum hydroxide, magnesium hydroxide, fly ash or the like is added as a filler and used as the backing layer 4.

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 of the carpet used as an embodiment of the present invention, the structure, the type of microcapsules encapsulating the phase change material and the urea-based hygroscopic agent, the processing method, the cool performance measurement test and the determination method are as follows.

<Materials used>
Base fabric: 100 g / m per unit weight ² polypropylene tape yarn woven fabric (14 × 13) Pile yarn: Pile yarn made of polyester fiber (crimped yarn) is looped in a tufting machine (1 / 8G) Implanted into cloth (pile length 5.0 mm, basis weight 500 g / m ² ) Backing layer: SBR latex (calcium carbonate as filler) Second base cloth: Needle punch nonwoven fabric made of 5 decitex polyester fiber (300 g / weight) m ² , thickness 6mm)
Microcapsules encapsulating phase change material: Prethermo (manufactured by Daiwa Chemical Industry Co., Ltd.)
Two types, melting point 25 ° C and melting point 31 ° C
Urea-based moisture absorbent: ethylene urea compound “FS50” (manufactured by Meisei Chemical Co., Ltd.)
Binder resin: Acrylic-silicone copolymer resin “Light Epoch” (manufactured by Kyoeisha Co., Ltd.)
Penetration agent "Perex OT-P" (manufactured by Kao Corporation)

<Cool feeling performance measurement test>
QMAX: Measured at an initial temperature of 36 ° C. and a contact pressure of 0.98 kPa of a pure copper plate using THERMO LABO II TYPE manufactured by Kato Tech Co., Ltd. A carpet having a temperature of 28 ° C. and a QMAX of greater than 0.075 j / cm ² · sec was accepted. However, the carpet was preliminarily pressed at 3.92 MPa and a temperature of 60 ° C. for 2 minutes to prepare the carpet surface, and measured after leaving it in the measurement environment for 2 hours or more.
Sensory evaluation: Evaluate whether or not it feels cold based on the carpet not fixed with the microcapsules encapsulating the phase change material, using a paired comparison method. What I felt was accepted. (Evaluated in a standard room with temperature 20 ° C and humidity 65%)
<Free formalin test>
Absorbance was measured based on JIS L 1041 acetylacetone method A method. Absorbance of 0.05 or less was accepted.

<Example 1>
A microcapsule dispersion liquid (paraffin-encapsulated, melting point 25 ° C., solid content 40%) in which 100 parts by weight of water is encapsulated with a phase change material and a microcapsule dispersion liquid (paraffin-encapsulated, melting point 31 ° C.) in which a phase-change material is encapsulated. In addition, 10 parts by weight of a solid content (40%) is dispersed, and then an aqueous solution in which 0.5 parts by weight of a penetrating agent, 3 parts by weight of a binder resin, and 10 parts by weight of a urea-based hygroscopic agent are dispersed is sprayed. 250 g / ^{m 2} was applied to the carpet surface, 120 ° C., 10 minutes drying to, coolness carpet microcapsules enclosing a phase transition material on the carpet where the 30 g / ^{m 2} and urea hygroscopic agent 30 g / ^{m 2} was fixed Got. In the cool feeling performance measurement test, QMAX was 0.085 j / cm ² · sec, and in sensory evaluation with Comparative Example 1, nine people felt cold. Absorbance was 0.022 by the free formalin test, and it was a pass.

<Comparative Example 1>
A carpet was obtained in the same manner as in Example 1 except that the microcapsule dispersion in which the phase change material was encapsulated was changed to 0. In the cool feeling performance measurement test, QMAX was 0.062 j / cm ² · sec, and it was used as a reference carpet in sensory evaluation. Absorption was 0.012 in the free formalin test, and it passed.

<Comparative example 2>
A carpet was obtained in the same manner as in Example 1 except that the urea-based moisture absorbent was changed to 0 in Example 1. In the cool feeling performance measurement test, QMAX was 0.072 j / cm ² · sec, and six people felt cold in the sensory evaluation with Comparative Example 1. In the free formalin test, the absorbance was 0.122, which was unacceptable.

<Example 2>
In Example 1, a microcapsule in which a phase change material was encapsulated on a carpet was obtained in the same manner as in Example 1 except that 30 parts by weight of a microcapsule dispersion (paraffin encapsulated, melting point 31 ° C., solid content 40%) was used. the 30 g / ^{m 2} and urea desiccant was obtained 30 g / ^{m 2} adhered to a cool feeling carpet. In the cool feeling performance measurement test, QMAX was 0.081 j / cm ² · sec, and eight people felt cold in the sensory evaluation with Comparative Example 1. Absorbance was 0.023 by the free formalin test, and it was a pass.

<Example 3>
A carpet was obtained in the same manner as in Example 1 except that, in Example 1, the pile yarn was changed to 4.2% double yarn of 100% cotton. In the cool feeling performance measurement test, QMAX was 0.103 j / cm ² · sec, and 10 people felt cold in the sensory evaluation with Comparative Example 1. Absorbance was 0.023 by the free formalin test, and it was a pass.

<Example 4>
A carpet was obtained in the same manner as in Example 1 except that 48% polypropylene fiber, 31% cotton and 21% polyester fiber were used as the pile yarn. In the cool performance measurement test, QMAX was 0.079 j / cm ² · sec, and 9 people in sensory evaluation with Comparative Example 1. Absorbance was 0.020 by the free formalin test, and it was a pass.

<Comparative Example 3>
In Example 1, 0.2 parts by weight of a microcapsule dispersion encapsulating a phase change material (paraffin encapsulation, melting point 25 ° C., solid content 40%) and a microcapsule dispersion encapsulating a phase transition material (paraffin encapsulation, melting point) A carpet was obtained in the same manner as in Example 1 except that the solid content was 31 parts by weight at 31 ° C. and 0.1% by weight. Microcapsules enclosing a phase transition material on carpet 0.3 g / m ² and urea hygroscopic agent was 30 g / m ² adhered to the carpet. In the cool feeling performance measurement test, QMAX was 0.070 j / cm ² · sec, and in the sensory evaluation with Comparative Example 1, only five people felt cold. Absorbance was 0.018 by the free formalin test, and it passed.

<Example 5>
In Example 1, a carpet was obtained in the same manner as in Example 1 except that a microcapsule in which a phase change material was previously encapsulated in a base fabric was used as a base fabric in which 40 g / m ² and a urea-based hygroscopic agent were fixed in 40 g / m ^2. It was. The fixed amount of the microcapsules enclosing the phase change material was 70 g / m ² including the amount fixed to the base fabric, and the fixed amount of the urea-based moisture absorbent was 70 g / m ² including the amount fixed to the base fabric. . In the cool feeling performance measurement test, QMAX was 0.092 j / cm ² · sec, and 10 people felt cold in the sensory evaluation with Comparative Example 1. Absorbance was 0.025 by the free formalin test, and it was a pass.

<Example 6>
A carpet was obtained in the same manner as in Example 1, except that 48% polypropylene fiber (crimp), 31% rayon fiber and 21% polyester fiber (crimp) were used as the pile yarn. In the cool feeling performance measurement test, QMAX was 0.115 j / cm ² · sec, and 10 people felt cold in sensory evaluation with Comparative Example 1. Absorbance was 0.012 in the free formalin test, and it passed.

<Example 7>
A carpet was obtained in the same manner as in Example 1, except that 48% polypropylene fiber (crimped), 31% non-crimped polyester fiber, and 21% polyester fiber (crimped) were used as the pile yarn. . In the cool feeling performance measurement test, QMAX was 0.108 j / cm ² · sec, and 10 people felt cold in sensory evaluation with Comparative Example 1. Absorbance was 0.015 in the free formalin test and it passed.

  As described above, the microcapsules encapsulating the phase change material and the urea-based hygroscopic agent at least fixed to the pile yarn are clearly more cool than the unprocessed ones. It was possible to reduce free formalin generated from the microcapsules encapsulating the phase change material.

It is a schematic sectional drawing which shows the cool feeling carpet which concerns on one Embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 ... Cool feeling carpet 2 ... Pile thread 3 ... Base cloth 4 ... Backing layer 5 ... Second base cloth 6 ... Microcapsule which enclosed phase change material 7 ... Urea-based moisture absorption Agent

Claims (11)

  In a carpet including a skin layer made of a pile yarn and a base fabric, and a backing layer, a microcapsule enclosing a phase change material and a urea-based hygroscopic agent are fixed to the pile yarn above the base fabric. A cool-looking carpet.   In a carpet including a skin layer composed of a pile yarn and a base fabric, and a backing layer, a microcapsule enclosing a phase change material and a urea-based moisture absorbent are fixed to the surface of the base fabric and the pile yarn above the base fabric. Cool carpet that is characterized by having.   The cool-feeling carpet according to claim 1, wherein the phase change material is a phase change material having a melting point of 20 to 35 ° C. and encapsulated in microcapsules.   The cool-feeling carpet according to claim 1 or 2, wherein the urea-based hygroscopic agent contains a urea-based compound composed of at least one of urea, ethylene urea, and thiourea.   3. The phase change material according to claim 1, wherein the phase change material is a phase change material having a melting point of 20 to 35 ° C. and encapsulated in microcapsules and having two or more melting points. 4. Cool carpet. Cool feeling mosquitoes according to any one of claims 1 to 5 characterized by the fact that fixed to Pet - microcapsules encapsulating the phase change material mosquitoes by at least 0.50~50.0g / m ² Binder resin -Pets. Cool feeling mosquitoes according to any one of claims 1 to 6 characterized by the fact that fixed to Pet - - the urea desiccant mosquitoes by at least 0.50~40.0g / m ² binder resin pets.   The cool feeling carpet according to any one of claims 1 to 7, characterized in that in the cool feeling carpet, the pile yarn is constituted by a pile yarn containing at least cotton.   The cool feeling carpet according to any one of claims 1 to 7, wherein in the cool feeling carpet, the pile yarn is constituted by a pile yarn containing at least 10% non-crimped yarn.   The cool feeling carpet according to any one of claims 1 to 7, wherein in the cool feeling carpet, the pile yarn is constituted by a pile yarn containing at least 10% of rayon yarn. 11. The cool feeling carpet according to claim 1, wherein a QMAX (contact temperature / cool feeling value) at a skin layer temperature of 28 ° C. is greater than 0.075 j / cm ² · sec. Cool carpet.

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