JP2005154938A - Thermal-comfort sheet and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermal-comfort sheet capable of facilitating the production of thermal-comfort members because of having flexibility and enabling such members to be imparted with adequate thermal-comfort effect. <P>SOLUTION: The thermal-comfort sheet 1 comprises a sheet-like reinforcing body 2 with fibers 2a entangled with one another while securing voids and numerous hollow particles 3 held through entangling with the fibers 2a to retain the voids and having closed cells 3a inside themselves. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a warm sheet and a manufacturing method thereof. Here, warm feeling refers to a characteristic that makes it harder to feel coldness or heat when a person touches the surface.

  Conventionally, Patent Document 1 discloses a heat-resistant sheet. This heat-resistant sheet is composed of a sheet-like reinforcing body in which ceramic fibers are entangled with each other while ensuring a gap, and α-sepiolite and unexpanded vermiculite held in entanglement with the fibers of the reinforcing body. This heat-resistant sheet is obtained by preparing a slurry composed of a dispersion medium such as water, fibers, α-sepiolite, and unexpanded vermiculite, and making paper from this slurry.

  The heat-resistant sheet thus obtained exhibits excellent heat resistance because the reinforcing body is made of ceramic fibers and α-sepiolite and unexpanded vermiculite are inorganic. Moreover, this heat-resistant sheet exhibits flexibility due to its reinforcing body being in the form of a sheet, and can also exhibit heat insulation properties due to the pores of α-sepiolite and unexpanded vermiculite. For this reason, it is thought that this heat-resistant sheet can be used in various parts where heat resistance, flexibility and heat insulation are required.

  In addition, if this heat-resistant sheet is adopted as a surface material of a temperature-sensitive member such as a waterproof pan for a bathroom, for example, the heat-resistant sheet has flexibility, so that it becomes easy to manufacture such a temperature-sensitive member. Conceivable. And the warming sensation member obtained in this way is in the shade in winter, it is hard to feel cold when a person touches the surface, it is in the sun in the summer, It is thought that the warm feeling effect that it is difficult to feel the heat when touching the surface can be exhibited.

JP 58-95636 A

  However, the conventional heat-resistant sheet is merely heat-insulating with α-sepiolite and unexpanded vermiculite having only open pores open to the outside, and it is difficult to retain heat by itself. . For this reason, even if a heat-sensitive member such as a waterproofing pan for bathrooms is manufactured using this heat-resistant sheet, a sufficient heat-sensitive effect cannot be expected.

  The present invention has been made in view of the above-described conventional situation, and can be easily manufactured by having flexibility, and imparts a sufficient warming effect to the warming member. Providing a possible warm sheet is an issue to be solved.

  The warm sensation sheet of the present invention is a sheet-like reinforcing body in which fibers are entangled with each other while ensuring a gap, and is held in tangling with the fibers of the reinforcing body, leaving the gap and closing pores within itself. And a myriad of pores having the structure.

  The warm sensation sheet of the present invention is flexible because the reinforcing body is in the form of a sheet. And by integrating this warm feeling sheet | seat with the base on the surface side of a base, the warm feeling member which has a warm feeling effect can be manufactured easily. In addition, as a base, FRP, a metal, etc. are employable. In particular, the warm sheet is lightweight because fibers and pores are entangled with each other leaving a gap. In addition, the warm sheet is strong by itself due to the pores held in contact with the reinforcing body and its fibers, and is easy to handle when integrated with the base. For this reason, according to this warm feeling sheet, manufacture of a warm feeling member can be made very easy.

  In addition, since this thermal sheet includes a myriad of pores with closed pores that can easily retain heat, only α-sepiolite or the like having only open pores opened to the outside as pores is used. Compared with the case where there was, a sufficient warming effect can be provided to a warming member. Further, in this warm sensation sheet, voids in which the pores are secured between the fibers of the reinforcing body remain, and the warm sensation effect can be imparted also by these voids.

  Therefore, the warm sensation sheet of the present invention can make the warm sensation member easy by being flexible, and can impart a sufficient warm sensation effect to the warm sensation member.

  A glass mat, non-woven fabric, woven fabric, paper or the like can be used as the reinforcing body. It is good also as a warm feeling sheet | seat by including a pore body when manufacturing a reinforcement body, and is good also as a warm feeling sheet | seat by including a pore body after manufacturing a reinforcement body.

  As the pore body, at least one of hollow particles and hollow fibers can be employed. That is, there are a case where only hollow particles are employed, a case where only hollow fibers are employed, and a case where hollow particles and hollow fibers are employed.

  The hollow particles are particles having a hollow portion sealed in a non-water-absorbing spherical or substantially spherical shell. The hollow part of the hollow particle becomes a closed pore. The hollow portion may be filled with a gas such as air or a vacuum. It may be inorganic hollow particles or organic hollow particles. As the inorganic hollow particles, glass balloons, silica balloons, quartz glass balloons, fly ash, shirasu balloons, alumina balloons, ceramic balloons and the like having a particle diameter of about several tens of μm can be employed. As the organic hollow particles, urethane balloons, phenol balloons, polyamide balloons and the like having a particle diameter of about several tens of μm can be employed. In the case of organic hollow particles, unexpanded particles can be used, and after forming into a sheet with a reinforcing body, it is possible to form hollow particles by heating.

  The hollow fiber is a fiber having a hollow portion with both ends opened in a non-water-absorbing cylindrical shell. The hollow portions of the hollow fibers are not individually continuous but are also closed pores. The hollow portion may be filled with a gas such as air or a vacuum. It may be an inorganic hollow fiber or an organic hollow fiber. As the inorganic hollow fiber, a hollow glass fiber having a diameter of about several tens of μm, a hollow silica fiber, a hollow quartz glass fiber, or the like can be employed. As the organic hollow fiber, a hollow polyester fiber or a hollow acrylic fiber having a diameter of about several tens of μm can be employed.

  The warm sensation sheet of the present invention can include particles and fibers having open pores in addition to the innumerable pores having closed pores therein. For example, inorganic porous particles or organic porous particles may be employed. As the inorganic porous particles, finely foamed pulverized ceramics, diatomaceous earth, silica gel, pumice powder, or the like can be used. As the organic porous particles, a finely foamed resin pulverized product or the like can be used.

  In the warm sheet of the present invention, it is preferable that a non-permeable surface layer is integrally provided on one side. In this case, since the warm sensation sheet itself has a surface layer, handling when producing the warm sensation member is easier. Moreover, the manufactured warm sensation member is excellent in antifouling property because it does not cause water content or the like in the voids between the pores due to the non-permeable surface layer.

  Moreover, it is also preferable that the non-water-permeable back surface layer is integrally provided on the other surface side of the warm sheet of the present invention. In this case, since the warm sensation sheet has a sandwich structure with the front surface layer and the back surface layer, handling when producing the warm sensation member becomes extremely easy. Moreover, the warming member excellent in antifouling property can be manufactured, without distinguishing the front and back of a warming sheet. Furthermore, the strength of the warming member having the sandwiched warming sheet is also improved.

  The method for producing a warm sheet of the present invention is characterized in that a slurry containing a dispersion medium, fibers, and a myriad of pores having closed pores therein is prepared and made from the slurry. According to this manufacturing method, since the pores are included when the reinforcing body is manufactured using the fiber, the warming sheet of the present invention can be easily manufactured. As the dispersion medium, water, alcohol, or the like can be employed. As the fibers, organic fibers such as polyethylene terephthalate (PET), acrylic, and vinylon can be used.

  In the production method of the present invention, it is preferable to integrally provide a water-impermeable surface layer on one side after papermaking. Thereby, the warm sheet | seat with a surface layer can be manufactured.

  In the production method of the present invention, it is also preferable to provide a water-impermeable surface layer integrally on the other surface side after papermaking. Thereby, the warm sheet | seat which has a surface layer on the front and back can be manufactured.

  As the front surface layer and the back surface layer, urethane resin, unsaturated polyester resin, or the like can be employed.

  Embodiments 1 to 6 embodying the present invention will be described below with reference to the drawings.

  First, short fibers made of PET, hollow particles (average particle size: 40 μm, “Glass Bubbles K37” manufactured by Sumitomo 3M Co., Ltd.), and DAP (diallyl phthalate) resin as a binder are prepared.

  These short fibers, hollow particles, and a binder are put into water as a dispersion medium to obtain a slurry. At this time, 5 parts by mass of short fibers, 30 parts by mass of hollow particles, and 5 parts by mass of the binder are added to 100 parts by mass of water. The slurry thus obtained is made and dried. In this way, as shown in FIG.

  This warm sensation sheet 1 is held by being entangled with the sheet-like reinforcing body 2 in which the short fibers 2a are entangled with each other while securing a gap, and the gap is left while remaining inside the inner part of the reinforcing sheet 2 And innumerable hollow particles 3 having closed pores 3a.

A non-woven fabric (“BORANS 4051N, 53 g / m ² per unit area) manufactured by Toyobo Co., Ltd.) prepared in advance by a needle punch method or a binder method is prepared in advance. The hollow particles of Example 1 are also prepared.

  From DAP resin (diallyl phthalate resin, “Dyso Dup A” manufactured by Daiso Corporation), organic peroxide pensoyl peroxide (“Nyper FF” manufactured by Nippon Oil & Fats Co., Ltd.), and ketone solvents such as methyl ethyl ketone Hollow particles are mixed in a soluble solvent to obtain a dispersion. As the soluble solvent, in addition to the ketone solvent, an ester (ethyl acetate) solvent and a chlorine (chloroform) solvent may be employed.

  This dispersion is spread on the nonwoven fabric. Thereafter, after the solvent of the dispersion liquid is vaporized, the DAP resin is cured in a curing furnace at 60 to 80 ° C. In this way, the hollow particles are fixed on the nonwoven fabric, and the same warm sensation sheet 1 as in Example 1 is obtained.

  The warm sensation sheet 1 of Examples 1 and 2 is referred to as an intermediate material 1. By bonding another nonwoven fabric integrally to the surface side of the intermediate material 1, a warm sensation sheet 1 is obtained. This impossible cloth may be produced by an existing technique such as a spunbond method, a needle punch method, a binder method, or a papermaking method. Moreover, this nonwoven fabric may be printed in advance.

  Using these warm sensation sheets 1, waterproof bathroom pans as warm sensation members are produced as follows. First, after obtaining the base SMC for normal FRP, the base SMC, the warm sheet 1 and the base SMC are laminated in this order in the cavity of the press die and simultaneously molded. Thus, the resin in the base SMC is impregnated on the surface side of the warm sheet 1 and cured to become a water-impermeable surface layer 5, and the base SMC is cured to impermeable to the back layer. 4 At this time, the warm sensation sheet 1 is easily formed because the reinforcing body 2 has a sheet shape and thus has flexibility. In addition, the warm sheet 1 is lightweight and easy to handle because it is strong. Thus, a waterproof pan for a bathroom can be easily obtained.

  As shown in FIG. 2, the bathroom waterproof pan includes a base 6 made of FRP formed by a base SMC, and a warm sensation sheet 1 integrally provided on the front side of the base 6 via a back layer 4. And the surface layer 5 provided integrally on the surface side of the warm sheet 1.

  In this bathroom waterproof pan, the thermal sheet 1 on the surface side that is directly touched by a person has innumerable pores 3a, and each pore 3a inhibits the movement of heat. For this reason, this waterproof pan for bathrooms makes it difficult to feel cold when a person touches the surface in winter, and exhibits an effective warm feeling effect. In particular, this waterproofing pan for bathrooms is opened to the outside because the warm sheet 1 includes innumerable hollow particles 3 having closed pores 3a that can easily retain heat in the interior, and the voids remain. Compared with the case where only α-sepiolite having only open pores as pores is used, a sufficient warming effect can be exhibited. Moreover, this waterproofing pan for bathrooms is excellent in antifouling property, since the water-impermeable surface layer 5 does not cause moisture or the like in the gaps between the hollow particles 3.

  Therefore, according to these warm feeling sheets 1, manufacture of the waterproofing pan for bathrooms can be facilitated, and a sufficient warming effect can be imparted to the waterproofing pan for bathrooms.

Moreover, it is also possible to manufacture the waterproofing bread | pan for bathrooms as follows using the warm feeling sheet | seat 1 of the said Examples 1-3. First, a solution prepared by dissolving a DAP resin and an organic peroxide pensoyl peroxide with a soluble solvent such as a ketone solvent is prepared, and the warm sheet 1 of Examples 1 to 3 is impregnated with this solution, and uncured. Use a warm sheet. And after evaporating the soluble solvent of an uncured warm sheet | seat, this is press-molded with the applied pressure of 1-5 kgf / m < ² > for 5 to 10 minutes, heating to 50-80 degreeC. Thus, a heat insulating member having a predetermined thickness can be manufactured. This heat insulating member is bonded to a base made of FRP or the like. Thereafter, a liquid urethane resin is applied to the surface by spraying to form a water-impermeable surface layer 5. Thus, a waterproof pan for a bathroom can be easily obtained.

  Furthermore, it is also possible to manufacture the waterproofing pan for bathrooms using the warm sensation sheets 1 of Examples 1 to 3 as follows. First, a solution prepared by dissolving a DAP resin and an organic peroxide pensoyl peroxide with a soluble solvent such as a ketone solvent is prepared, and the warm sheet 1 of Examples 1 to 3 is impregnated with this solution, and uncured. Use a warm sheet. Then, an uncured warm sheet and a base SMC are laminated in this order in the cavity of the press die and simultaneously molded. Thereby, with hardening of SMC for base parts, DAP resin in a warm feeling sheet arranged on the surface is also hardened. Thereafter, a liquid urethane resin is applied to the surface by spraying to form a water-impermeable surface layer 5. Thus, a waterproof pan for a bathroom can be easily obtained.

  The warm sensation sheet 1 obtained in Examples 1 to 3 is referred to as an intermediate material 1. As shown in FIG. 3, a liquid urethane resin is applied to the surface side of the intermediate material 1, and the liquid urethane resin is cured to form a water-impermeable surface layer 5. Thus, the warm sheet 6 is obtained. A water-impermeable surface layer 5 is integrally provided on one side of the warm sheet 6. In this case, since the warm sensation sheet 6 itself has the surface layer 5, it is easier to handle when manufacturing a waterproof pan for a bathroom. Other functions and effects are the same as those of the first to third embodiments.

  The warm sheet 6 obtained in Example 4 is used as an intermediate material 6. As shown in FIG. 4, the liquid unsaturated polyester resin is also applied to the back side of the intermediate material 6, and the liquid liquid unsaturated polyester resin is cured to form a water-impermeable back layer 7. In this way, the warm feeling sheet 8 is obtained. A non-water-permeable back layer 7 is integrally provided on the other side of the warm sheet 8. The back surface layer 7 is integrated with the back surface layer 4 (see FIG. 2) made of resin in the base SMC when manufacturing a waterproof pan for a bathroom. In this case, since the warm sensation sheet 8 has a sandwich structure with the front surface layer 5 and the back surface layer 7, handling when manufacturing a waterproof pan for a bathroom becomes extremely easy. Moreover, the waterproofing pan for bathrooms excellent in antifouling property can be manufactured, without distinguishing the front and back of the warm feeling sheet | seat 8. FIG. In addition, the strength of the waterproofing pan for bathrooms having the warm sensation sheet 8 having a sandwich structure is also improved. Other functions and effects are the same as those of the fourth embodiment.

  In Example 6, as shown in FIG. 5, hollow fibers 9 are used together with the hollow particles 3. The thermal sensation sheets 1 and 6 are held by being entangled with the sheet-like reinforcing body 2 in which the short fibers 2a are entangled with each other while securing the gap, and the gap is left while the short fibers 2a of the reinforcing body 2 remain. It consists of innumerable hollow particles 3 having closed pores 3a inside, and innumerable hollow fibers 9 which are held in contact with the short fibers 2a of the reinforcing body 2 and leave voids and have closed pores 9a in themselves. . Other configurations are the same as those in the first and fourth embodiments. This warm feeling sheet | seat 1 and 6 can also show the effect similar to Examples 1-5.

  The present invention is a waterproof member for bathrooms, bathtubs, wall panels, ceiling panels, counters, flooring materials such as verandas and balconies, etc. It can be used for the manufacturing method of this warm feeling member.

3 is a schematic cross-sectional view of a warm sensation sheet of Example 1. FIG. It is a schematic cross section of the waterproofing pan for bathrooms using the warm feeling sheet of Examples 1-3. 6 is a schematic cross-sectional view of a warm sensation sheet of Example 4. FIG. 6 is a schematic cross-sectional view of a warm sensation sheet of Example 5. FIG. 6 is a schematic cross-sectional view of a warm sensation sheet of Example 6. FIG.

Explanation of symbols

2a ... fibers 2 ... reinforcing bodies 3a, 9a ... closed pores 3, 9 ... pores (3 ... hollow particles, 9 ... hollow fibers)
5 ... Surface layer 4, 7 ... Back layer

Claims (8)

  A sheet-like reinforcing body in which fibers are entangled with each other while ensuring voids, and an infinite number of pores that are held in entanglement with the fibers of the reinforcing body, leave the voids, and have closed pores inside themselves. A warm feeling sheet characterized by containing.   The warm sensation sheet according to claim 1, wherein a non-water-permeable surface layer is integrally provided on one surface side.   The warm sheet according to claim 2, wherein a non-water-permeable back layer is integrally provided on the other side.   The warm sheet according to any one of claims 1 to 3, wherein the pore body is at least one of hollow particles and hollow fibers.   A method for producing a warm sheet, comprising preparing a slurry containing a dispersion medium, fibers, and an infinite number of pores having closed pores therein, and making the slurry.   6. The method for producing a warm sensation sheet according to claim 5, wherein a non-permeable surface layer is integrally provided on one surface side after paper making.   The method for producing a warm sheet according to claim 6, wherein a non-permeable surface layer is integrally provided on the other surface side after paper making.   The method for producing a warm sheet according to any one of claims 5 to 7, wherein the pore body is at least one of hollow particles and hollow fibers.

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