JP2013111299A - Moisture absorption and heat generation carpet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carpet that is devised in view of a technological background and acquires mild warmth and soft touch when a person touches the front surface of the carpet.SOLUTION: The carpet that provides soft texture and warm touch is obtained by allowing a moisture absorption and heat generation agent to fix to the base fabric of the carpet, including: a skin layer constituted of pile yarn and the base fabric; and a backing layer, by performing cross-linking with the use of a cross-linking agent containing an epoxy group.

Description

  The present invention relates to a carpet having a moisture-absorbing heat-generating effect, in which a gentle warmth is felt when a person touches the carpet surface.

  In Japan, carpets are used in a different way from Europe and the US, often sitting on the carpet or lying down. Therefore, the feel when the carpet is touched by hand is an important factor when purchasing the carpet. In particular, those that are soft and have a feeling of touch like fur with long bristle feet are preferred. On the other hand, from the viewpoint of energy saving, carpets that are superior in heat insulating properties and heat retaining properties compared to other flooring materials have been reviewed, and carpets that are further functionalized are required.

  In patent document 1, the textile product for interiors using the fiber which adhered the water molecule adsorption heat generating material and the heat storage agent is proposed, and the heat generated by using two of the water molecule adsorption heat generating material and the heat storage agent is proposed. A technique is disclosed in which the temperature rise of the fiber is controlled to make a person feel warm and comfortable, and such a time is continued for a long time.

  Patent Document 2 proposes an interior material to which highly hygroscopic fine particles are attached as an interior material that absorbs moisture in the living room and moisture emitted from the human body to generate heat and develop an auxiliary heating effect. doing. As the highly hygroscopic fine particles, for example, any one of polystyrene-based, polyacrylonitrile-based, polyacrylic acid ester-based, polymethacrylic acid ester-based vinyl polymers, sulfonic acid groups, carboxylic acid groups, phosphoric acid groups, or Disclosed are crosslinked polymer fine particles having at least one hydrophilic group of those metal salts and crosslinked with either divinylbenzene, triallyl isocyanate or hydrazine.

  Patent Document 3 has the same configuration as Patent Document 2, and is suitable for cold clothing, cold-proof living materials, bedding interior materials, etc., and heat generation rate, heat generation temperature, heat generation retention, condensation during moisture absorption or water absorption. A hygroscopic / water-absorbing exothermic structure excellent in prevention is provided.

  However, the techniques of Patent Documents 1 to 3 are unsuitable for processing a carpet where a soft touch feeling is preferred, and improvement is required because the texture becomes hard even when processed into a pile yarn of carpet.

Therefore, the applicant has proposed a carpet having a soft texture and a warm feel by cross-linking and adhering the hygroscopic exothermic resin to the fiber of the pile yarn with a crosslinking agent having an epoxy group in Patent Document 4. Furthermore, there is a demand for improved warmth of touch.
JP 2003-193371 A JP 2003-96672 A Japanese Patent Application No. 2003-147680 Japanese Patent Application No. 2009-263804

  The present invention has been made in view of such technical background, and an object of the present invention is to provide a carpet that can obtain a gentle warmth and a soft feel when a person touches the surface of the carpet.

  As a result of intensive studies to solve such problems, the present inventors have determined that the moisture-absorbing exothermic agent is applied to the base fabric of the carpet including a skin layer made of a pile yarn and a base fabric, and a backing layer. It has been found that a carpet having a soft texture and a warm touch can be obtained by cross-linking and fixing with a cross-linking agent having a water content. In order to achieve the above object, the present invention provides the following means.

[1] A carpet including a skin layer composed of a pile yarn and a base fabric, and a backing layer, wherein the moisture absorbing exothermic agent is adhered to the base fabric.

[2] The carpet according to item 1 above, wherein the hygroscopic exothermic agent is a copolymer of a vinyl sulfonic acid monomer, and is attached to the base fabric by a crosslinking agent having an epoxy group.

[3] the adhesion amount with respect to the base fabric of the heat absorption agent, mosquitoes according to item 1 or 2 which is 5 to 200 g / ^{m 2} - pet.

In the invention of [1], in a carpet including a skin layer made of a pile yarn and a base fabric, and a backing layer, a hygroscopic exothermic agent is attached to the base fabric, so when touching the carpet surface, At the same time you can get a soft touch, you can feel a gentle warmth. When a person touches the pile yarn on the carpet surface, the hygroscopic exothermic agent adhering to the base fabric absorbs moisture from the human skin via the pile yarn and generates heat, so that a gentle warmth can be felt.

In the invention [2], since the hygroscopic exothermic agent is a copolymer of vinyl sulfonic acid monomer, it can generate heat at an appropriate temperature. Moreover, since it cross-links and adheres to the base fabric with a cross-linking agent having an epoxy group, it firmly adheres and has excellent water resistance.

In the invention of [3], since the amount of the hygroscopic exothermic agent attached to the base fabric is 5 to 200 g / m ² , the carpet having sufficient hygroscopic exothermic performance can be obtained.

  Next, an embodiment of a hygroscopic heat-generating carpet according to the present invention will be described with reference to the drawings. The hygroscopic exothermic carpet 1 of this embodiment includes a skin layer 4 composed of a pile yarn 2 and a base fabric 3 and a backing layer 5, and a hygroscopic exothermic agent (not shown) is attached to the base fabric 3. In addition, in FIG. 1, a second base fabric 6 made of a nonwoven fabric is laminated in order to protect the backing layer 5 and provide cushioning properties.

The hygroscopic exothermic agent is not particularly limited as long as it exhibits moisture absorption or exothermicity upon water absorption, and is preferably a polymer having a sulfonic acid group, a polycarboxylic acid compound or a copolymer thereof. The sulfonic acid group and carboxyl group may be free sulfonic acid or carboxylic acid, or may be in the form of a metal salt or a mixture of both. For example, examples of the polycarboxylic acid-based compound include a polymer of one kind of compound or a copolymer of several kinds of compounds selected from acrylic acid, methacrylic acid, maleic acid, and fumaric acid. The polymer having a sulfonic acid group is selected from vinyl sulfonic acid monomers such as 2-acrylamido-2-methylpropane sulfonic acid monomer, styrene sulfonic acid monomer, isoprene sulfonic acid monomer, and acrylic sulfonic acid monomer. Or a copolymer of several compounds, or a copolymer with a polycarboxylic acid compound. Of these, a copolymer of vinyl sulfonic acid is preferable.

  The metal forming a salt with the polycarboxylic acid or polysulfonic acid compound is not particularly limited, but Li, Na, K, Cu, Zn, Al, Ni, Co, Fe, Mn, Mg, Ca, Sn , Cr and the like.

  The method for forming these metal salts is not particularly limited, and may be a metal salt at the raw material monomer stage, or free polysulfonic acid obtained by polymerizing free sulfonic acid or carboxylic acid monomer. The polycarboxylic acid compound may be substituted with a metal. For example, a metal salt can be obtained by adding a metal hydroxide, halide, oxide or the like to an aqueous solution of free polysulfonic acid or polycarboxylic acid compound.

  Also, after free polysulfonic acid and polycarboxylic acid compounds are fixed to a carpet having a crosslinker having an epoxy group by treatment, the carpet is immersed in a treatment bath containing a metal and heated if necessary. Thus, a metal can be introduced into the sulfonic acid group or carboxyl group.

  Polysulfonic acid and polycarboxylic acid compounds need not be pure polysulfonic acid or polycarboxylic acid, and other groups such as sulfonic acid groups and carboxyl groups partially esterified may be introduced. There is no problem.

  As the crosslinking agent, any crosslinking agent having an epoxy group may be used, and examples thereof include melamine resins, glyoxy resins, blocked isocyanate derivatives, and polyglycidyl derivatives. These crosslinking agents may be used alone or in combination with a plurality of types of crosslinking agents.

  The method for adhering the hygroscopic exothermic agent and the crosslinking agent having an epoxy group to the pile yarn is not particularly limited, and examples thereof include a dipping method and a spraying method.

  The heat treatment method is not particularly limited, and examples thereof include dry heat treatment, heating with normal pressure steam, and heat treatment with high pressure steam at about 170 ° C.

  The pH of the mixed treatment solution of the hygroscopic exothermic agent and the crosslinking agent having an epoxy group is not particularly limited, but a range of pH 1 to 6 is suitable as a condition for providing durability.

Although there is no restriction | limiting in particular in the adhesion amount with respect to the base fabric of a hygroscopic exothermic agent, 5-200 g / m < ² > is suitable. By setting it within this range, the heat generation is increased by 0.5 to 8.0 ° C., and a carpet having sufficient moisture absorption heat generation performance can be obtained.

Although there is no restriction | limiting in particular in the adhesion amount with respect to the base fabric of the crosslinking agent which has an epoxy group, 0.01-5 g / m < ² > is suitable. By setting it in this range, the cross-linking agent having an epoxy group cross-links and adheres to the base fabric, so that it firmly adheres and is excellent in water resistance.

  The molecular weight of the hygroscopic exothermic agent is not particularly limited, but in order to obtain high durability, those having a molecular weight of 2,000 or more are preferable, and those having a molecular weight of 5,000 to 100,000 are particularly durable. It is preferable from the aspect of fixing and having a texture after processing.

  The target carpet fibers are not particularly limited, but include synthetic fibers such as polyester, acrylic, nylon, and polypropylene, semi-synthetic fibers such as rayon, and natural fibers such as cotton, silk, wool, and hemp. be able to. The pile may be a cut pile or a loop pile, but the cut pile is more warm. The basis weight of the pile yarn 2 is not particularly limited as long as it forms a carpet.

  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 fibers, polypropylene fibers, hemp, and cotton. Furthermore, a base fabric obtained by combining and integrating a woven fabric, a knitted base fabric, a non-woven fabric, or the like may be used.

  Next, the backing layer 5 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 a backing layer.

Further, as shown in FIG. 1, a second base fabric 6 made of a nonwoven fabric may be provided below the backing layer 5 in order to provide cushion performance and backing layer protection performance. It does not specifically limit as the second base fabric 6, A needle punch nonwoven fabric, a spunbond nonwoven fabric, etc. can be illustrated. The basis weight of the second base fabric 6 is preferably 50 to 1000 g / m ² , its 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 6 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 as in the case of pile yarn and base fabric. Further, an anti-slip layer may be formed on the lowermost surface of the second base fabric 6 with a resin composition or a rubber composition.

  Next, the material, structure, processing method, hygroscopic heat generation performance measurement test and determination method of the carpet used as an example of the present invention are as follows.

<Materials used>
Base fabric: 100 g / m ² polypropylene tape yarn woven fabric (14 × 13) and 80 g / m ² polyester non-woven fabric laminated and integrated by needling Pile yarn: Pile yarn made of polyester fiber Cut into a base fabric with a tufting machine (1 / 8G) in a cut shape (pile length 7.0 mm, basis weight 730 g / m ² )
Backing layer: SBR latex (calcium carbonate as filler)
Second base fabric: Needle punched nonwoven fabric made of 5 dtex polyester fiber (300 g / m ² basis weight, thickness 6 mm)
Hygroscopic exothermic agent ... Vinyl sulfonic acid monomer copolymer Cross-linking agent ... Epoxy-based cross-linking agent

<Hygroscopic heat generation performance measurement test>
Measurement of temperature rise: The sample was dried at 120 ° C. for 30 minutes, then placed in a desiccator, allowed to cool at 20 ° C., and after 1 hour, the surface temperature was set at 30 ° C. in a 20 ° C. and 90% RH environment for 30 minutes. The maximum value was measured as the temperature rise value. A temperature rise value larger than 2 ° C. was regarded as acceptable.
Sensory evaluation: Based on the feeling of touching the carpet (Comparative Example 1) on which the hygroscopic exothermic agent is not fixed to the base fabric, whether or not it feels warm is evaluated by a paired comparison method, and the number of subjects is 10 More than 80% of people felt warm. (Evaluated indoors at a temperature of 20 ° C and humidity of 30%)
<Feel sensory test>
Based on the feeling of touching the carpet (Comparative Example 1) to which the hygroscopic exothermic agent is not fixed, the paired comparison method is used to evaluate whether or not it feels hard. The number of subjects is 10, and 2 people feel hard. A person or less was accepted. (Evaluated indoors at a temperature of 20 ° C and humidity of 30%)

<Example 1>
After dispersing 40 parts by weight of a hygroscopic exothermic agent in 100 parts by weight of water, an aqueous solution in which 0.5 part by weight of a crosslinking agent is dispersed is applied to the surface of the base fabric by spraying at 250 g / m ^{2 and} dried at 120 ° C. for 10 minutes. The carpet which fixed 75 g / m < ² > of the hygroscopic exothermic agent on the base fabric was obtained by processing. In the temperature rise measurement test, the temperature rose by 8 ° C., and in sensory evaluation with Comparative Example 1, 10 people felt warm. Moreover, also about the texture, it was a soft touch feeling like the comparative example 1, and it was a pass without feeling that anyone was hard in the texture sensory test.

<Comparative Example 1>
A carpet was obtained in the same manner as in Example 1 except that the hygroscopic exothermic agent was changed to 0 in Example 1. In the temperature rise measurement test, it was 1 ° C. Moreover, it was set as the carpet used as a reference | standard in sensory evaluation.

<Example 2>
In Example 1, a fabric weight of 100 g / m ² polypropylene tape yarn (14 × 13) was used for the base fabric, 13 parts by weight of the hygroscopic exothermic agent was dispersed in 100 parts by weight of water, and 25 g of the hygroscopic exothermic agent was added to the base fabric. A carpet was obtained in the same manner as in Example 1 except that / m ^{2 was} fixed. In the temperature rise measurement test, it was 3.5 ° C. In sensory evaluation with Comparative Example 1, 10 people felt warm. Moreover, also about the texture, it was a soft touch feeling like the comparative example 1, and it was a pass without feeling that anyone was hard in the texture sensory test.

<Example 3>
In Example 1, a carpet was obtained in the same manner as in Example 1 except that polyacrylic acid was used in place of the vinyl sulfonic acid copolymer as the hygroscopic exothermic agent. In the temperature rise measurement test, it was 7.5 ° C. In sensory evaluation with Comparative Example 1, 10 people felt warm. Further, the texture was also a soft touch feeling as in Comparative Example 1, and no one felt that it was hard in the texture sensory test.

<Comparative example 2>
Example 1 is the same as Example 1 except that polyacrylic acid was used as the hygroscopic exothermic agent instead of the vinyl sulfonic acid copolymer, and the hygroscopic exothermic agent was fixed to 75 g / m ² on the pile yarn surface instead of on the base fabric. Carpet was obtained in the same way. In the temperature rise measurement test, it was 8 ° C. In the sensory evaluation with Comparative Example 1, 10 people felt warm, but the texture was clearly harder than that of Comparative Example 1, and in the texture sensory test, all 10 people felt hard and failed.

<Comparative Example 3>
A carpet was obtained in the same manner as in Example 1, except that 1.6 parts by weight of the hygroscopic exothermic agent was dispersed and 3 g / m ² of the hygroscopic exothermic agent was fixed on the base fabric. Although it was a soft touch feeling compared with the comparative example 1 about the feel, and it was a pass without feeling hard in the feel sensory test, it was 1.2 degreeC in the temperature rise measurement test. In the sensory evaluation with Comparative Example 1, only 3 people felt that it was warm and failed.

1 is a schematic cross-sectional view showing a hygroscopic exothermic carpet according to an embodiment of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Hygroscopic carpet 2 ... Pile yarn 3 ... Base cloth 4 ... Skin layer 5 ... Backing layer 6 ... Second base fabric

Claims (3)

  A carpet including a skin layer made of a pile yarn and a base fabric, and a backing layer, wherein the moisture absorbing exothermic agent is attached to the base fabric.   The carpet according to claim 1, wherein the hygroscopic exothermic agent is a copolymer of a vinyl sulfonic acid monomer, and is attached to the base fabric by a crosslinking agent having an epoxy group. The adhered amount with respect to the base fabric of heat absorption agent, mosquitoes according to claim 1 or 2 which is 5 to 200 g / m ² - pet.

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