JP2006212895A - Laminate, building member and floor heating panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminate hard to receive the effect of the expansion caused by moisture absorption or thermal contraction and expansion, excellent in dimensional stability and suitable for a building member hard to cause warpage or bending, the building member and a floor heating panel. <P>SOLUTION: The laminate is constituted by laminating at least one kind of a sheetlike material selected from the group consisting of kraft paper, a fabric and a nonwoven fabric at least on one side of a thermoplastic resin sheet (preferably comprising a polyolefin resin sheet with a draw ratio of 8-40 times) with the coefficient of linear expansion of -2×10<SP>-5</SP>-1×10<SP>-5</SP>/°C, an elastic modulus of 5-15 GPa and a resin content of 70% or above. The building member is constituted by laminating the laminate at least on one side of a woody material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a laminate, a building member, and a floor heating panel. More specifically, the present invention relates to a laminate, a building member, and a floor heating panel that are suitably used for a member such as a fence, a door, or various flooring materials.

  Conventionally, a building member used for a member such as a floor heating panel is not warped due to expansion or thermal expansion / contraction due to moisture absorption due to changes in humidity and temperature in the usage environment, and warpage. There was a problem of bending and bending.

  In order to solve the above problem, for example, in Patent Document 1, in a heat generation floor plate including a specific surface material and a back material, the back material is a core material made of fibers with small dimensional change, and the core material. There is disclosed a heat-generating floor board that is formed into a sheet-like structure composed of a thin sheet layer made of a vegetable fiber material that is heat-bonded to the front and back surfaces of each through a resin layer over the entire core material.

  However, the back material as described above does not necessarily have sufficient strength and water resistance. For example, due to the so-called weeping phenomenon in which moisture enters from the lamination interface, the hygroscopic expansion of the wood-based material used for the heating floor material. Such as heat generation and heat insulation used in the heat generating flooring, and the warping and bending of the flooring caused by the above water absorption expansion and thermal expansion and contraction of the material. In some cases, a sufficient prevention effect is not always obtained.

  For this reason, a metal foil such as an aluminum foil may be laminated together if necessary, but in this case, there is a problem of separation disposal and recycling as well as a problem of cost increase.

Japanese Patent Laid-Open No. 11-093388

  In view of the above-described conventional problems, the object of the present invention is a laminate and a building member suitable for a building member that is hardly affected by expansion or thermal expansion / contraction due to moisture absorption, has excellent dimensional stability, and does not easily warp or bend. And to provide floor heating panels.

The laminate according to claim 1 is a thermoplastic resin sheet having a linear expansion coefficient of −2 × 10 ⁻⁵ to 1 × 10 ⁻⁵ / ° C., an elastic modulus of ⁵ to 15 GPa, and a resin component of 70% or more. At least one sheet-like material selected from the group consisting of kraft paper, woven fabric, and nonwoven fabric is laminated on at least one side.

The laminate according to claim 2 is the laminate according to claim 1, wherein the linear expansion coefficient is −2 × 10 ⁻⁵ to 1 × 10 ⁻⁵ / ° C., and the elastic modulus is ⁵ to 15 GPa. And

  The laminate according to claim 3 is the laminate according to claim 1 or 2, wherein the thermoplastic resin sheet is a polyolefin resin sheet having a draw ratio of 8 to 40 times.

  The building member according to claim 4 is characterized in that the laminated body according to any one of claims 1 to 3 is laminated on at least one side of a wood-based material.

  The building member according to claim 5 is characterized in that a polyolefin resin sheet having a draw ratio of 8 to 40 times and a wood material are joined via a thermoplastic resin.

  The floor heating panel according to claim 6 is a crosspiece arranged opposite to each other in parallel, a surface material joined over one surface of the crosspiece, and a back material joined over the other surface of the crosspiece. A heating element and a heat insulating material are arranged in a frame constituted by the above, and the back material is made of the laminate according to claims 1 to 3.

  The floor heating panel according to claim 7 is a crosspiece arranged in parallel to each other, a surface material joined over one surface of the crosspiece, and a back material joined over the other surface of the crosspiece. A heating element and a heat insulating material are disposed in a frame constituted by the above, the back material is a polyolefin resin sheet having a draw ratio of 8 to 40 times, and the back material and the crosspiece are thermoplastic. It is characterized by being bonded via resin.

Hereinafter, the present invention will be described in detail.
The thermoplastic resin sheet in the present invention has a linear expansion coefficient of −2 × 10 ⁻⁵ to 1 × 10 ⁻⁵ / ° C., an elastic modulus of ⁵ to 15 GPa, and contains a resin component of 70% or more.

  When the linear expansion coefficient is too small, interfacial peeling of the laminate may occur, and when it is too large, the laminate itself may be thermally expanded and contracted to prevent the effect of preventing warpage or bending.

  If the elastic modulus is too small, due to insufficient strength of the resulting laminate, the water absorption expansion and thermal expansion / contraction suppression effect may be insufficient, and the warping and bending prevention effect may be insufficient, If the elastic modulus is too large, the laminate may become too stiff and the adhesiveness may decrease due to adverse effects such as wrapping.

  When there are too few said resin components, the water resistance of a laminated body will become inadequate, and a weeping phenomenon etc. will occur easily.

  The thermoplastic resin constituting the thermoplastic resin sheet is not particularly limited, and examples thereof include polyolefin resins, polyester resins such as polyethylene terephthalate, and polyamide resins such as nylon.

  Moreover, the said thermoplastic resin sheet is preferable at the point which the linear expansion coefficient and elastic modulus of the sheet | seat obtained are easy to control that the said thermoplastic resin is formed by extending-molding.

  The laminate of the present invention is obtained by laminating at least one sheet-like body selected from the group consisting of kraft paper, woven fabric, and nonwoven fabric on at least one side of the thermoplastic resin sheet.

  The kraft paper in the present invention refers to paper made of kraft pulp, which has high mechanical strength and excellent water resistance. The kraft paper may be laminated alone, but at least one side is preferable in that it is a laminate with improved water resistance when coated with polyethylene.

If the basis weight of the kraft paper is too small, swelling due to moisture absorption occurs, and if it is too large, there is a possibility that the mechanical properties inherent to the stretched sheet cannot be expressed, so 50-100 g / m ² is preferable.

The non-woven fabric in the present invention refers to a cloth made by combining synthetic fibers, natural fibers, glass fibers, etc. with mats or thin cottons by an appropriate method, and bonding the fibers together with the adhesive or the bonding force of the fibers themselves. The woven fabric refers to a woven fabric made of synthetic fiber, natural fiber, glass fiber, or the like.
Although it does not specifically limit as a fiber which comprises the said nonwoven fabric and woven fabric, In order to laminate | stack with the wooden material mentioned later, a natural fiber and a vegetable fiber especially are preferable. Moreover, when using the nonwoven fabric or woven fabric which consists of synthetic fibers, it is preferable to give a corona discharge process to the surface layer of a nonwoven fabric or a woven fabric. By using such a nonwoven fabric or a woven fabric, the adhesive force with the wooden material mentioned later improves, As a result, the building member excellent in water resistance can be obtained.

  The kraft paper, woven fabric, and non-woven fabric and at least one sheet-like material selected from the group consisting of are laminated on at least one side of the thermoplastic resin sheet. This is preferable in that moisture absorption can be more reliably suppressed.

  More preferably, the sheet-like body has water resistance. Examples of such a sheet-like body include one obtained by coating polyethylene on one side of kraft paper, VR sheet (manufactured by Dai Nippon Printing Co., Ltd.), synthetic paper (specially processed paper mainly made of synthetic resin: eg YUPO special processing Paper (manufactured by Oji Oil Chemical Co., Ltd.).

When the linear expansion coefficient of the laminate is −2 × 10 ⁻⁵ to 1 × 10 ⁻⁵ / ° C. and the elastic modulus is ⁵ to 15 GPa, the dimensional stability is excellent, and the effect on warping and bending is further ensured. This is preferable. If the linear expansion coefficient is too small, the interfacial peeling of the laminate may occur. If it is too large, the laminate itself may be thermally expanded and contracted to reduce the effect of preventing warpage or bending. In addition, if the elastic modulus is too small, due to insufficient strength of the resulting laminate, the water absorption expansion and thermal expansion and contraction suppression effect may be insufficient, warping and bending prevention effect may be insufficient, If the elastic modulus is too large, the laminate may be too stiff and bonding may be difficult due to adverse effects such as wrapping.

  When the thermoplastic resin sheet is made of a polyolefin resin sheet having a draw ratio of 8 to 40 times, the water resistance of the sheet itself is improved, so that a laminate having an excellent balance between strength and water resistance is easily obtained. This is preferable.

  Although the draw ratio of the said extending | stretching olefin resin sheet is not specifically limited, 8-40 times are preferable, More preferably, it is 10-35 times. When the stretched olefin resin sheet is laminated on both surfaces of the resin foam, it is possible to prevent warping and bending of the obtained laminate. If the draw ratio is too small, sufficient tensile elastic modulus may not be exhibited, and thermal expansion and contraction may become too large. If the stretch ratio is too large, the sheet may be easily broken during stretch molding.

  As the olefin resin constituting the stretched olefin resin sheet, any olefin resin having sheet forming ability can be used. For example, a high density polyethylene resin, a medium density polyethylene resin, a low density polyethylene resin, a linear low density Polyethylene resin, polypropylene resin, ethylene-propylene copolymer, ethylene-pentene-1 copolymer, ethylene-vinyl acetate copolymer, ethylene- (meth) acrylate copolymer, ethylene-vinyl chloride copolymer, Examples thereof include an ethylene-propylene-butene copolymer, and a high-density polyethylene resin is preferably used.

If the density of the high-density polyethylene resin is small, the shape following property is not improved even if it is stretched, so 0.94 g / cm ³ or more is preferable.

  Also, the weight average molecular weight of the high density polyethylene resin is preferably 200,000 to 500,000 because the rigidity does not improve much even if stretched if it becomes too small, and molding and stretching becomes difficult if it becomes too large. (MI) is preferably 0.1 to 20 and more preferably 0.2 to 10 because of its excellent moldability.

  In the present invention, the high-density polyethylene may be used alone, but other polyolefins may be mixed in a proportion of 30 parts by weight or less with respect to 100 parts by weight of the high-density polyethylene. Examples of other polyolefins used in combination include low density polyethylene, ethylene-vinyl acetate copolymer, and polyvinyl acetate.

  Further, the high-density polyethylene may be cross-linked. In this case, it is preferable that the gel fraction of the resin sheet obtained is 20% or more.

  As the stretching method of the olefin resin sheet, any conventionally known method may be adopted. However, since it is highly stretched by 8 to 40 times, the olefin resin sheet is rolled and then stretched or stretched a plurality of times. A method of repeated multistage stretching is preferred.

  The rolling is a method in which an olefin-based resin sheet is supplied to a pair of rolls rotating in opposite directions and pressed to reduce the thickness of the sheet and extend, and the rolled sheet differs from the stretched sheet in that it is an olefin-based sheet. Since the resin is dense without being oriented, it is highly stretchable.

  The rolling temperature cannot be uniformly rolled when the temperature is low, and melt-cut when it is high. Therefore, the roll temperature during rolling is preferably in the range of "melting point-40 ° C" to the melting point of the olefin resin of the olefin resin sheet to be rolled. More preferably, it is “melting point−30 ° C.” to “melting point−5 ° C.” of the olefin resin.

  In the present invention, the melting point refers to the maximum point of the endothermic peak that accompanies melting of the crystal, which is recognized when thermal analysis is performed with a differential scanning calorimeter (DSC).

  If the rolling ratio is small, the subsequent stretching is burdened, and increasing the rolling ratio makes rolling difficult, so 4 to 10 times is preferable. In the present invention, the rolling ratio and the stretching ratio are values obtained by dividing the cross-sectional area of the sheet before rolling or stretching by the cross-sectional area of the sheet after rolling or stretching.

  The stretching may be any conventionally known method, and examples thereof include a method of stretching while heating with a heater or hot air by a roll stretching method or a zone stretching method.

  The stretching temperature cannot be uniformly stretched when the temperature is lowered, and the sheet melts and cuts when the temperature is increased. Therefore, the range of “melting point−60 ° C.” to the melting point of the olefin resin of the stretched olefin resin sheet is preferable, more preferably It is “melting point−50 ° C.” to “melting point−5 ° C.” of the base resin.

  In addition, since the overall draw ratio after rolling is 8 to 40 times, the overall draw ratio may be determined so as to be within this range in consideration of the roll ratio. If the amount is small, the mechanical strength is not improved, so it is preferably 2 times or more, more preferably 3 times or more. In addition, the whole draw ratio is a numerical value obtained by multiplying the draw ratio after rolling and the draw ratio after rolling.

  When the stretched olefin-based resin sheet is thin, the mechanical strength is lowered, and when it is thick, the stretched olefin-based resin sheet is easily cracked in the stretching direction. Therefore, the thickness is generally 0.05 to 1.5 mm, preferably 0.15 to 0.7 mm. is there.

  It is preferable that the stretched olefin-based resin sheet is annealed in terms of further improving the effect of preventing thermal expansion / contraction or warping and bending.

  The building member of the present invention is formed by laminating the above laminate on at least one surface of a wood-based material. The said structure will not be specifically limited if the said laminated body is laminated | stacked on the at least single side | surface of wooden material, For example, the said laminated body may be laminated | stacked on both surfaces of the wooden material.

  The wood material is not particularly limited. For example, natural wood, plywood, particle board, wafer board, wood board such as MDF, wood chips (wood pieces), synthetic wood filled with wood powder, etc., synthetic wood, synthetic resin , And laminates thereof. Further, the wooden material may be one in which a heating means such as a warm floor panel is incorporated. When the temperature change of the woody material such as a warm floor panel is remarkable, the effect that the present invention is excellent in dimensional stability and hardly warps or bends is exhibited more remarkably.

  The method for laminating the laminate on the wood-based material is not particularly limited, and examples thereof include a method using an adhesive (including a hot melt adhesive) and a pressure-sensitive adhesive.

  Examples of the adhesive include epoxy adhesives and urethane adhesives, and emulsion adhesives are preferably used from the viewpoint of economy such as cost. Examples of emulsion adhesives include vinyl acetate adhesives, urethane adhesives, and acrylic adhesives. When an olefin-based nonwoven fabric is used as the sheet-like body, an ethylene vinyl acetate-based adhesive (hereinafter sometimes referred to as “EVA”) is preferable in terms of excellent adhesiveness to wood.

  Moreover, it is also possible to heat-seal | stack the said laminated body to a wood type material through an adhesive film, and to laminate | stack. In this case, it is preferable in that the adhesive film is melted so that the laminate and the wooden material are firmly bonded.

  It is preferable that the adhesive film is an ethylene vinyl acetate resin film because it is easily melted by heating and is laminated more firmly.

  In the above, if the melt index (MI) of the ethylene vinyl acetate resin film is too small, the fluidity may be insufficient, resulting in poor lamination, and if too large, the product may protrude from the end during lamination and defective products may occur. Therefore, it is preferable that it is 1.0-10.0.

  When the above-mentioned building member is formed by joining a polyolefin resin sheet having a draw ratio of 8 to 40 times and a wood material through a thermoplastic resin, the polyolefin resin sheet and the wood material are strong. It is preferable in that it has excellent dimensional stability according to the present invention, and the effect that warpage and bending hardly occur is remarkably exhibited. Moreover, after laminating | stacking a thermoplastic resin on the surface of the said extending | stretching polyolefin-type resin sheet, when a corona discharge process is given, it is more preferable at the point joined still more firmly.

The thermoplastic resin is not particularly limited, and examples thereof include polyethylene resins and ethylene vinyl acetate resins.

  If the melt index (MI) of the ethylene vinyl acetate resin is too small, fluidity may be insufficient and lamination failure may occur, and if it is too large, the product may protrude from the end during lamination, resulting in defective products. It is preferable that it is 0.0-10.0.

  As a method of joining via the thermoplastic resin, for example, there is a method of joining by pressure bonding or heat fusion by interposing a film, an adhesive (including a hot melt adhesive) made of the thermoplastic resin, or the like. Can be mentioned.

  In the above, when the sheet-like body is laminated between the stretched olefin resin sheet and the woody material while interposing a molten thermoplastic resin discharged in the form of a film by extrusion or the like, the stretched olefin resin sheet and the sheet It is preferable in that the solid body is heat-sealed and firmly bonded.

  The floor heating panel of the present invention is composed of a crosspiece arranged in parallel with each other, a surface material joined over one surface of the crosspiece, and a back material joined over the other surface of the crosspiece. A heating element and a heat insulating material are arranged in the frame, and the back material is made of the laminate.

  The surface material is not particularly limited. For example, a synthetic resin-injected wood veneer or plywood obtained by injecting and solidifying a synthetic resin liquid such as unsaturated polyester, acrylic, styrene, or phenol into a wood veneer or a wood veneer. , WPC decorative plywood, and those formed from metal plates. In the case of wood veneer or synthetic resin-injected wood veneer, plywood, MDF, particle board, etc. having an appropriate thickness on its back surface A wooden base material made of a body may be bonded.

  Further, the floor heating panel of the present invention includes a crosspiece arranged in parallel to each other, a surface material joined over one surface of the crosspiece, and a back material joined over the other surface of the crosspiece. A heating element and a heat insulating material are disposed in a frame composed of the above, the back material is a polyolefin resin sheet having a draw ratio of 8 to 40 times, and the back material and the crosspiece are thermoplastic. It may be bonded via a resin.

  According to the present invention, at least one sheet-like body selected from the group consisting of kraft paper, woven fabric, and nonwoven fabric is laminated on at least one surface of the stretched olefin-based resin sheet. Weeping phenomenon is not likely to occur, and a laminate with both water resistance and strength can be obtained. Can be provided.

Moreover, when the linear expansion coefficient of the laminate is −2 × 10 ⁻⁵ to 1 × 10 ⁻⁵ / ° C. and the elastic modulus is ⁵ to 15 GPa, the dimensional stability is excellent, and the effect of preventing warpage and bending is improved. The above effect is further certain.

  The building member of the present invention is formed by laminating the above laminate on at least one surface of a wood-based material. Since the above structure is characterized in that the laminate is laminated on at least one side of a wood-based material, similarly to the above, it is hardly affected by expansion and thermal expansion / contraction due to moisture absorption, and has excellent dimensional stability, warping and bending. It is possible to provide a building member that is difficult to generate.

  When the above-mentioned building member is formed by joining a polyolefin resin sheet having a draw ratio of 8 to 40 times and a wood material through a thermoplastic resin, the polyolefin resin sheet and the wood material are strong. The above effects are further ensured.

  The floor heating panel of the present invention is composed of a crosspiece arranged in parallel with each other, a surface material joined over one surface of the crosspiece, and a back material joined over the other surface of the crosspiece. Since the heating element and the heat insulating material are arranged in the frame, and the back material is made of the laminated body, the above effect is further ensured.

  The floor heating panel is composed of a crosspiece arranged in parallel to each other, a surface material joined over one surface of the crosspiece, and a back material joined over the other surface of the crosspiece. In the frame, a heating element and a heat insulating material are arranged, the back material is made of a polyolefin resin sheet having a draw ratio of 8 to 40 times, and the back material and the crosspiece are interposed via a thermoplastic resin. In the case of being joined, the back material and the crosspiece are firmly joined and integrated, and the above effect is further ensured.

The present invention will be specifically described below by showing examples and comparative examples.
In addition, this invention is not limited only to the following Example.
Example 1
A high-density polyethylene (manufactured by Nippon Polychem Co., Ltd.) having a weight average molecular weight (Mw) of 3.3 × 10 ⁵ and a melting point of 135 ° C. is supplied to an extruder and melt-kneaded at a resin temperature of 200 ° C. To obtain a polyethylene resin sheet.

  The obtained polyethylene resin sheet was rolled to 10.6 times using a rolling molding machine (manufactured by Sekisui Koki Co., Ltd.) heated to 120 ° C., and the obtained rolled sheet was heated to 110 ° C. Were subjected to multi-stage stretching with a magnification of 1.27 times to obtain a stretched polyethylene resin sheet with a total stretching ratio of 13.5 times.

Kraft paper was laminated on both sides of the obtained stretched polyethylene resin sheet to obtain a laminate. The laminating method was carried out by thermally fusing a polyethylene resin in a molten state discharged in a film form by extrusion while interposing between a stretched polyethylene resin sheet and kraft paper. The drawn polyethylene resin sheet obtained above had a linear expansion coefficient of −1.0 × 10 ⁻⁵ / ° C. and an elastic modulus of 14 GPa. The obtained laminate had a linear expansion coefficient of −0.4 × 10 ⁻⁵ / ° C. and an elastic modulus of 9.5 GPa.

(Example 2)
Example 1 is the same as Example 1 except that a PP / PE nonwoven fabric having a core-sheath structure is laminated on both sides and subjected to corona discharge treatment. The obtained laminate had a linear expansion coefficient of −1.0 × 10 ⁻⁵ / ° C. and an elastic modulus of 13.5 GPa.

(Example 3)
The laminate obtained in Example 1 was bonded to MDF (thickness: 5 mm) using a vinyl acetate emulsion adhesive and laminated to obtain a building member.

Example 4
The laminate obtained from Example 2 was bonded to MDF (thickness: 5 mm) using a vinyl acetate emulsion adhesive and laminated to obtain a building member.

(Example 5)
A laminated article obtained by laminating a low-density polyethylene film on the surface of a stretched olefin-based resin sheet and then corona discharge-treating it to an MDF (thickness: 5 mm) using a vinyl acetate emulsion adhesive and laminating it. Got.

(Example 6)
A rectangular bar-shaped crosspiece is arranged in parallel with each other, and a rectangular plate-like surface material (synthetic resin-injected wood veneer formed by injecting and solidifying unsaturated polyester into a wooden veneer) on the upper surface of the crosspiece, A heating element and a heat insulating material were disposed in a frame formed by joining a back surface material to the lower surface of the crosspiece via a thermoplastic resin (ethylene vinyl acetate resin) to obtain a floor heating panel. Note that the laminate obtained in Example 1 was used as the back material.

(Example 7)
A floor heating panel was obtained in the same manner as in Example 6 except that the laminate obtained in Example 2 was used as the back material.

(Example 8)
A floor heating panel was obtained in the same manner as in Example 6 except that the laminate obtained in Example 5 was used as the back material.

(Comparative Example 1)
A laminate was obtained in the same manner as in Example 1 except that a polypropylene resin fiber reinforced sheet containing 50% by weight of glass fiber was used instead of the stretched polyethylene resin sheet. The obtained laminate had a linear expansion coefficient of −1.6 × 10 ⁻⁵ / ° C. and an elastic modulus of 7.7 GPa.

(Comparative Example 2)
The laminate of Comparative Example 1 was bonded to MDF and laminated to obtain a building member.

(Comparative Example 3)
MDF simple substance was used as a building member.

(Comparative Example 4)
A floor heating panel was obtained in the same manner as in Example 6 except that the laminate obtained in Comparative Example 1 was used as the back material.

The following evaluation was performed about the obtained laminated body, the member for construction, and the floor heating panel. The evaluation results are shown in Tables 1-2.
(water resistant)
As a surface water absorption test, the upper part of the laminate obtained above was held for 72 hours in contact with water at room temperature, and then the sheet thickness of the part in contact with water was measured. Sheet thickness before contact). The smaller the change in thickness due to water absorption, the better the water resistance.

(Warpage amount)
(1) Architectural member The architectural member obtained above is cut, a sample (length 700 × width 300 mm) is cut out, and an opening of an 80 ° C. water tank having an opening (length 600 × width 300 mm) at the top The sample was placed in a flat state and held for 1 hour in a state where water vapor generated from hot water at 80 ° C. was brought into contact with the evaluation sample at the opening, and then the sample was placed in a flat shape to warp the sample. The amount was measured. The amount of warpage was the maximum value of the distance between the lower surface of the sample and the flat surface at the end or center of the sample.
(2) Floor heating panel As an alternative characteristic of warpage, the floor heating panel obtained above was energized (temperature rise), and the elongation in the longitudinal direction was measured. It is evaluated that warpage can be reduced (prevented) as the elongation is smaller.

  As is clear from Tables 1 and 2, it was found that the laminate of the present invention has a small change due to water absorption and excellent water resistance even when contacted with moisture. Further, it was found that the building member of the present invention, the building member and the floor heating panel using the same are less likely to warp or bend, are less susceptible to expansion and thermal expansion / contraction due to moisture absorption, and have excellent dimensional stability. did.

Claims (7)

Kraft paper, woven fabric on at least one surface of a thermoplastic resin sheet having a linear expansion coefficient of −2 × 10 ⁻⁵ to 1 × 10 ⁻⁵ / ° C., an elastic modulus of ⁵ to 15 GPa, and containing 70% or more of a resin component And a laminate comprising at least one sheet-like body selected from the group consisting of non-woven fabrics. The linear expansion coefficient is −2 × 10 ⁻⁵ to 1 × 10 ⁻⁵ / ° C., and the elastic modulus is ⁵ to 15 GPa.   The laminate according to claim 1 or 2, wherein the thermoplastic resin sheet comprises a polyolefin resin sheet having a draw ratio of 8 to 40 times.   A building member comprising the laminate according to any one of claims 1 to 3 laminated on at least one surface of a wood-based material.   A building member comprising a polyolefin resin sheet having a draw ratio of 8 to 40 times and a wood material bonded via a thermoplastic resin.   A heating element in a frame composed of a crosspiece arranged in parallel and facing, a surface material joined over one surface of the crosspiece, and a back material joined over the other surface of the crosspiece And a heat insulating material, and the back material is a laminate according to claims 1 to 3.   A heating element in a frame composed of a crosspiece arranged in parallel and facing, a surface material joined over one surface of the crosspiece, and a back material joined over the other surface of the crosspiece And the heat insulating material is disposed, the back material is made of a polyolefin resin sheet having a draw ratio of 8 to 40 times, and the back material and the crosspiece are joined via a thermoplastic resin. Features a floor heating panel.