JP2009101635A - Heat insulating sheet and its manufacturing method and covering material, its manufacturing method and its installation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulating sheet the heat insulating performance and sound insulating performance of which per unit thickness are improved to thin the heat insulating sheet and whose property of transforming itself following a complicate three-dimensional shape of an object is enhanced to improve the adhesion of the heat insulating sheet to the object and the construction efficiency of the heat insulating sheet. <P>SOLUTION: The method for manufacturing the heat insulating sheet comprises the steps of: incorporating a thermally fusible base stock in each of extensible cloth materials 4, 5; applying a liquid of an elastic resin 7, in which a heat insulating body 6 is blended and which has thermal fusibility, to one surface of the extensible cloth material 4 and drying the applied liquid to form a layer of the elastic resin 7 on the extensible cloth material 4; superposing the extensible cloth material 5 on the elastic resin 7-side surface of the extensible cloth material 4 and fusing the superposed cloth materials to each other to manufacture the heat insulating sheet 2 in which an intermediate layer 3 of the elastic resin is formed between both outer layers of the extensible cloth materials 4, 5. A covering material 30 of the final product is obtained by heating the heat insulating sheet 2 and pressing and stamping out the heated heat insulating sheet to obtain a desired shape. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat insulating sheet used for heat insulation and soundproofing of equipment, a manufacturing method thereof, a covering material, a manufacturing method thereof, and a covering material construction method.

  Conventionally, a high-temperature housing (for example, an internal combustion engine and its exhaust part) having a curved shape in mechanical equipment, and pipe materials (for example, three-dimensional piping such as different diameter joints) used in mechanical equipment, water pipes, steam pipes, For heat insulation and soundproofing of gas pipes, etc., heat insulation materials made of inorganic short fibers such as glass wool and rock wool, and foams of organic resins such as urethane foam and polyethylene foam are formed into a sheet shape. Heat insulation material is wrapped around these housings and pipes, foam heat insulation material is molded to match the outer surface of the curved housing, or molded into a half-cylindrical shape to match the outer diameter of the pipe. In other words, covering with a molded cover is performed (see Patent Document 1).

However, in a heat insulating material such as glass wool, rock wool, and polyethylene foam as in the invention described in Patent Document 1, the thermal conductivity is as high as 0.035 W / m · K to 0.040 W / m · K or more, When coating with high heat insulation is required, it is necessary to increase the thickness of the coating material, and there is a problem that it is difficult to install in a narrow space. Moreover, although thermal conductivity is a level equivalent to glass wool and rock wool heat insulating material, in order to improve bending covering property, 30-70 mass% of a hardly soluble inorganic raw material, 20-60 mass of ceramic fiber and / or mineral fiber. %, 3 to 10% by weight of pulp, 1 to 10% by weight of alumina, and 1 to 10% by weight of an aqueous slurry are made to produce a sheet-like heat insulating material (see Patent Document 2). ).
Japanese Patent Laying-Open No. 2005-221076 (3rd and 4th pages, FIGS. 1-4) JP 2002-81146 A (page 4)

  However, in the conventional heat insulating material described in the above-mentioned Patent Document 1, although the thickness of the pipe is substantially constant and can be efficiently coated on the linear part, the pipe including a different diameter pipe joint or an elbow pipe, About covering of the housing | casing of the complicated shape which has a curved surface, it is necessary to shape | mold or manufacture according to a shape, and there exists a problem that construction cost will be invited or construction efficiency will worsen and construction efficiency will fall. Moreover, in the conventional sheet-like heat insulating material described in Patent Document 2, it is sandwiched between metal plates at a level equivalent to that of glass wool or rock wool heat insulating material (thermal conductivity is 0.040 W / m · K or more). When it is applied to a housing or a pipe having a complicated curved surface shape or a three-dimensional shape, there is a problem that the cost is increased and the construction efficiency is lowered as in the case of the heat insulating material.

The first invention of the present invention has been made to solve the above-mentioned problems, and has a simple structure and high heat insulation and soundproofing performance even if it is thin, easy to process, and molded into a complicated three-dimensional shape. A heat insulating sheet capable of improving performance, increasing elasticity and extensibility, improving followability to deformation, improving adhesion to heat insulation objects, improving construction efficiency and extending the service life, and a method for manufacturing the same It is intended to provide.
The second invention of the present invention has been made in order to solve the above-mentioned problems, and has a simple structure, high heat insulation and soundproofing performance even if the thickness is thin, easy to process, and a complicated three-dimensional shape. A coating material capable of improving the molding efficiency and increasing the elasticity and improving the follow-up property against deformation to improve the adhesion to the object to be coated, improving the construction efficiency and extending the service life, and the coating method thereof It aims at providing the construction method of material.

  The heat insulating sheet according to claim 1 of the present invention is composed of a first and second outer layer composed of a pair of stretchable cloth materials, and an elastic resin intermediate layer laminated between the two outer layers and including a heat insulator. It has a layer structure.

  In the heat insulation sheet according to claim 1 of the present invention, the first and second outer layers formed of a pair of stretchable cloth materials and the elastic resin intermediate layer laminated between the two outer layers and including a heat insulator are provided. By having a layer structure, even if the heat insulating sheet is thin, the heat insulating performance and soundproof performance per unit thickness are improved. Since the outer layer on the outer side of the heat insulating sheet has extensibility and the inner intermediate layer has elasticity, the followability to deformation is increased and the adhesion to the object to be insulated is improved. For this reason, construction efficiency improves. The strength is improved by the cloth material being laminated on both surfaces of the intermediate layer.

  The heat insulating sheet according to claim 2 of the present invention includes a first outer layer composed of a stretchable cloth material, a second outer layer composed of a nonwoven fabric having a stretchable and heat-fusible material, and these It is laminated between both outer layers and has a three-layer structure with an intermediate layer in which a nonwoven fabric containing a heat-fusible material is impregnated with an elastic resin containing a heat insulator.

  In the heat insulating sheet according to claim 2 of the present invention, a first outer layer composed of a stretchable cloth material, a second outer layer composed of a nonwoven fabric having a stretchable and heat-fusible material, and these By having a three-layer structure with an intermediate layer that is laminated between both outer layers and impregnated with a non-woven fabric containing a heat-fusible material and an elastic resin containing a heat insulator, the heat insulation sheet is thin. Heat insulation performance and soundproof performance per unit thickness are improved. Since the outer layer on the outer side of the heat insulating sheet has extensibility and the inner intermediate layer has elasticity, the appearance is soft and the followability to deformation is improved, and the adhesion to the heat insulating object is improved. For this reason, construction efficiency improves. The strength is improved by laminating the cloth material and the nonwoven fabric on both surfaces of the intermediate layer. Furthermore, the appearance is soft, so that the appearance is soft and the touch is soft. When a thick or brushed nonwoven fabric is used, the fabric contains air, and the heat insulation performance is improved.

  A heat insulating sheet according to claim 3 of the present invention is laminated between a first and second outer layer made of a pair of nonwoven fabrics having extensibility and containing a heat-fusible material, and heat fusion. A non-woven fabric containing an adhesive material has a three-layer structure with an intermediate layer impregnated with an elastic resin containing a heat insulator.

  In the heat insulating sheet according to claim 3 of the present invention, the first and second outer layers composed of a pair of nonwoven fabrics having extensibility and containing a heat-fusible material are laminated between these two outer layers, and heat fusion is performed. By having a three-layer structure with an intermediate layer impregnated with an elastic resin containing a heat insulator in a non-woven fabric containing an adhesive material, the heat insulation sheet has a heat insulation performance and a soundproof performance per unit thickness even if it is thin. And improve. Since the outer layer on the outer side of the heat insulating sheet has extensibility and the inner intermediate layer has elasticity, the appearance is soft and the followability to deformation is improved, and the adhesion to the heat insulating object is improved. For this reason, construction efficiency improves. The strength is improved by laminating the nonwoven fabric on both surfaces of the intermediate layer. Furthermore, the appearance is soft, so that the appearance is soft and the touch is soft. In addition, when a thick or brushed nonwoven fabric is used, the fabric contains air, and the heat insulation performance is improved.

  The heat insulating sheet according to claim 4 of the present invention is such that the outer layer extends in one direction or two different directions.

  In the heat insulating sheet according to claim 4 of the present invention, the outer layer extends in one direction or two different directions, so that the followability to the deformation of the heat insulating sheet can be changed depending on the object to be used. For more complex shaped objects, stretchable cloth material that stretches in two directions, which can be deepened in comparison with the deformation, can be expanded. The heat insulating sheet can be manufactured by using each of stretchable cloth materials that extend in one direction which is relatively low.

  The heat insulating sheet has a thickness of 0.05 to 2 in which the stretchable cloth material is woven using elastic fiber yarns having an elongation of 40% or more made of any one of polyester resin, ester type urethane resin, and ether type urethane resin. It is preferably composed of a woven fabric having an elongation of 10% or more at 0.0 mm. By adopting such a configuration, the stretching performance is improved and the followability to deformation is further increased.

  The heat insulating sheet is a polyester nonwoven fabric having a thickness of 0.05 to 3.0 mm, which contains heat-fusible fibers containing at least one of a polyamide resin or a polyolefin resin having a melting point of 80 to 160 degrees Celsius. Is preferred. By adopting such a configuration, since the heat fusion is performed at 80 to 160 degrees Celsius at the time of fusion by heating, the fusion performance is improved even at a relatively low temperature. For this reason, manufacturing cost is reduced.

  In the heat insulating sheet, it is preferable that the heat insulating body is composed of hollow beads, and the resin in which the hollow beads are blended has a solid weight component ratio between the hollow beads and the resin in the range of 20:80 to 50:50. By adopting such a configuration, the weight can be reduced while ensuring higher heat insulation performance.

  The heat insulation sheet has a hollow bead inside a fine particle body made of any one of phenol resin, vinylidene chloride / acrylonitrile copolymer, vinylidene chloride / acrylic copolymer, acrylic copolymer or vinyl chloride copolymer. Further, it is preferably constituted by low-boiling hydrocarbons that are gasified by heat or foamable hollow beads containing a foaming agent. By adopting such a configuration, when heating necessary for foaming is performed during the manufacturing process, the fine particles of the material blended in the elastic resin are foamed into foamable hollow beads, and a heat insulator is formed in the intermediate layer of the elastic resin. Is formed.

  The heat insulating sheet is a closed cell hollow bead composed of a hollow microparticle made of an organic balloon or an inorganic balloon, the organic balloon is a phenol resin balloon, and the inorganic balloon is a glass balloon. Any one of alumina balloon, silica-alumina balloon, silica balloon, shirasu balloon and carbon balloon is preferable. By setting it as such a structure, in addition to heat insulation, heat resistance and fire resistance are improved.

  Insulation sheet is made of elastic resin with hollow beads, styrene / butadiene rubber, acrylonitrile / butadiene rubber, olefin elastomer resin, styrene elastomer resin, urethane elastomer resin, polyester elastomer resin, polyamide or aramid elastomer resin It is preferable that any one of them or a mixed dispersion containing one or more of these is a resin to be solidified or cured. By adopting such a configuration, the elasticity is improved and higher heat insulating performance and soundproof performance are exhibited.

  The method for producing a heat insulating sheet according to claim 5 of the present invention includes a first step of forming an elastic resin layer on one surface of an extensible cloth material by applying and drying an elastic resin liquid containing a heat insulator. Another extensible cloth material is laminated and fused on the surface of the extensible cloth material on the elastic resin layer side, and the first and second outer layers are constituted by the pair of extensible cloth materials. And a second step in which an intermediate layer of an elastic resin including a heat insulator is laminated to form a three-layer structure.

  In the method for manufacturing a heat insulating sheet according to claim 5 of the present invention, a first step of forming an elastic resin layer by applying and drying an elastic resin liquid containing a heat insulator on one surface of the extensible cloth material; Another extensible cloth material is laminated and fused on the surface of the extensible cloth material on the elastic resin layer side, and the first and second outer layers are constituted by the pair of extensible cloth materials. And a second step of forming a three-layer structure by laminating an intermediate layer of an elastic resin including a heat insulator, and then heating and fusing without stretching the stretchable cloth material Since the intermediate layer of the elastic resin including the heat insulator is formed simply by making it, the manufacture of the heat insulating sheet is simplified. Moreover, even if the heat insulation sheet manufactured in this way is thin, the heat insulation performance per unit thickness and the soundproof performance are improved. Since the stretchable layer is formed of the extensible cloth material on the outside of the heat insulating sheet, the followability to deformation is increased and the adhesion to the heat insulating object is improved. For this reason, construction efficiency improves. The strength is improved by the cloth material being laminated on both surfaces of the intermediate layer.

  The method for producing a heat insulating sheet according to claim 6 of the present invention includes a first step of applying a liquid of an elastic resin containing a heat insulating material to a non-woven fabric containing a heat-fusible material, and drying and impregnating the liquid. A stretchable cloth material is laminated on one surface of the nonwoven fabric, and another nonwoven fabric having a stretchable and heat-fusible material is laminated and fused on the other surface, and the first outer layer is made of the stretchable cloth material and another nonwoven fabric. Thus, the second outer layer is formed, and the second step of forming a three-layer structure by laminating the intermediate layer of the nonwoven fabric impregnated between the two outer layers is provided.

  In the method for manufacturing a heat insulating sheet according to claim 6 of the present invention, the first step of applying and drying impregnated liquid of an elastic resin containing a heat insulating material to a non-woven fabric containing a heat-fusible material and the impregnation are performed. A stretchable cloth material is laminated on one surface of the nonwoven fabric, and another nonwoven fabric having a stretchable and heat-fusible material is laminated and fused on the other surface, and the first outer layer is made of the stretchable cloth material and another nonwoven fabric. And forming a second outer layer and laminating an intermediate layer of a nonwoven fabric impregnated between the two outer layers to form a three-layer structure, thereby stacking a stretchable cloth material. By simply heating and fusing without using an adhesive, an intermediate layer of an elastic resin including a heat insulator is formed, so that the manufacture of the heat insulating sheet is simplified. Moreover, even if the heat insulation sheet manufactured in this way is thin, the heat insulation performance per unit thickness and the soundproof performance are improved. Since the stretchable layer is formed of the extensible cloth material on the outside of the heat insulating sheet, the followability to deformation is increased and the adhesion to the heat insulating object is improved. For this reason, construction efficiency improves. The strength is improved by laminating the cloth material and the nonwoven fabric on both surfaces of the intermediate layer.

  The method for producing a heat insulating sheet according to claim 7 of the present invention includes a first step of applying a liquid of an elastic resin containing a heat insulating material to a nonwoven fabric containing a heat-fusible material, and drying and impregnating the liquid. Another nonwoven fabric that has extensibility and includes a heat-fusible material is laminated and fused on both sides of the nonwoven fabric, and the first and second outer layers are constituted by these different nonwoven fabrics, and are impregnated between these two outer layers. And a second step of laminating the intermediate layers of the nonwoven fabric to form a three-layer structure.

  In the method for manufacturing a heat insulating sheet according to claim 7 of the present invention, the first step of applying and drying impregnating the liquid of the elastic resin containing the heat insulating material to the non-woven fabric containing the heat-fusible material and the impregnation Another nonwoven fabric that has extensibility and includes a heat-fusible material is laminated and fused on both sides of the nonwoven fabric, and the first and second outer layers are constituted by these different nonwoven fabrics, and are impregnated between these two outer layers. The second step of forming a three-layer structure by laminating the intermediate layer of the non-woven fabric is a heat insulating process by simply stacking the extensible cloth material and fusing it without using an adhesive. Since the intermediate layer of the elastic resin including the body is formed, the manufacture of the heat insulating sheet is simplified. Moreover, even if the heat insulation sheet manufactured in this way is thin, the heat insulation performance per unit thickness and the soundproof performance are improved. Since the stretchable layer is formed of a soft and extensible cloth material on the outside of the heat insulating sheet, the followability to deformation is increased and the adhesion to the heat insulating object is improved. For this reason, construction efficiency improves. The strength is improved by laminating the nonwoven fabric on both surfaces of the intermediate layer. Furthermore, the appearance is soft, so that the appearance is soft and the touch is soft. In addition, when a thick or brushed nonwoven fabric is used, the fabric contains air, and the heat insulation performance is improved.

  In the method for producing a heat insulating sheet according to claim 8 of the present invention, a liquid of an elastic resin containing a heat insulator is applied to the first outer layer and dried, and at the time of lamination, the elastic resin layer side of the first outer layer The surface is superimposed on the impregnated nonwoven fabric.

  In the method for producing a heat insulating sheet according to claim 8 of the present invention, the elastic resin liquid containing the heat insulating material is applied to the first outer layer and dried, and when laminated, the elastic resin layer side of the first outer layer is laminated. By making the surface overlap the impregnated nonwoven fabric, the intermediate layer is easily laminated.

  A method for producing a heat insulating sheet is a polyester nonwoven fabric having a thickness of 0.05 to 3.0 mm, which contains a heat-fusible fiber containing at least one of a polyamide resin and a polyolefin resin having a melting point of 80 to 160 degrees Celsius. In the second step, it is preferable to pressurize and heat-seal with heat. By adopting such a configuration, the fusing performance is improved even at a relatively low temperature. For this reason, manufacturing cost is reduced.

  The heat insulating sheet manufacturing method includes a sublimation material or a foaming agent that gasifies by heat inside the heat insulating body, and a fine particle body that encloses and seals the gas generated inside when the resin shell expands by receiving heat. It is preferable to form and form hollow beads in which a gas is confined during heating. With this configuration, when heating necessary for gasification is performed during the manufacturing process, the sublimation material or foaming agent inside the fine particles blended in the elastic resin is gasified and gas is contained in the intermediate layer of the elastic resin. A hollow bead confining is formed. For this reason, gasification can be performed at the same time during the stacking process, and the work of manufacturing the hollow beads in advance is unnecessary, and the manufacturing time is shortened.

  The covering material which concerns on Claim 9 of this invention shape | molds the heat insulation sheet of any one of Claims 1 thru | or 4 according to the shape of the object to be coated.

  In the covering material which concerns on Claim 9 of this invention, the heat insulation sheet of any one of Claims 1 thru | or 4 was shape | molded according to the shape of the object to be coated, so that the outside of the covering material is stretchable. Since the outer layer with a layer is laminated, the molding performance is improved, the elasticity and extensibility are increased, and the followability to deformation is high, so the molded coating material does not perfectly match the object to be coated In any case, as long as the general shape is ensured, both ends of the covering material can be pulled and securely adhered to the object to be covered. For this reason, construction efficiency improves. Moreover, since it can be used even if the molded covering material does not completely match the shape of the object to be coated, it is not necessary to mold into various shapes, and waste can be saved.

  The covering material which concerns on Claim 10 of this invention forms a heat insulating sheet in the covering material piece of a half box shape which has a curved surface, or a half-divided cylindrical shape, and comprised these covering pieces to comprise a covering material. .

  In the covering material according to claim 10 of the present invention, the insulating sheet is formed into a half-box-shaped or half-cylindrical covering material piece having a curved surface, and the covering material is configured by combining these covering pieces. It becomes easy to deal with complicated construction objects.

  A covering material according to an eleventh aspect of the present invention is such that a paper mold that has been molded according to the shape of at least a part of the surface is adhered to the surface of a molded half-shaped covering material piece. is there.

  In the covering material according to the eleventh aspect of the present invention, a paper mold that has been molded according to the shape of at least a part of the surface is attached to the surface of the formed half-shaped covering material piece. , The strength can be increased.

  In the covering material according to the twelfth aspect of the present invention, a joining surface is formed on the half-shaped covering material piece, and the other half-shaped covering material pieces are joined to each other by being covered with the covering object. The adhesive part is formed.

  In the covering material according to the twelfth aspect of the present invention, the halved covering material piece is formed with a joining surface that is covered with the other halved covering material pieces and joined to each other. Since the adhesive portion is formed, the object to be covered can be covered with the covering material only by matching the joint surfaces of the half-shaped covering material pieces, and the work is made efficient.

  According to a thirteenth aspect of the present invention, there is provided a coating material manufacturing method, comprising: heating and pressing a heat insulating sheet manufactured by the method according to any one of the fifth to eighth aspects according to a shape of an object to be coated. The semi-finished product that has been pressed is punched and molded.

  In the manufacturing method of the coating | covering material which concerns on Claim 13 of this invention, the heat insulation sheet manufactured by the method of any one of Claim 5 thru | or 8 is heated and pressed according to the shape of coating object. Since the press-processed semi-finished product is punched and molded, a covering material molded into a desired shape can be obtained by a simple process, and the manufacturing time is shortened. A stretchable cloth material is laminated on the outside of the manufactured covering material to improve molding performance, increase elasticity and stretchability, and increase the followability to deformation. Even if it does not completely match the construction object to be coated, as long as the general shape is secured, both ends of the coating material can be pulled and securely adhered to the coating object. For this reason, construction efficiency improves. Moreover, since it can be used even if the molded covering material does not completely match the shape of the object to be coated, it is not necessary to mold into various shapes, and waste can be saved.

  In the method for manufacturing a covering material according to claim 14 of the present invention, a heat insulating sheet is inserted into a mold formed in a half box shape or a half cylinder shape having a curved molding surface, and is press-worked. A covering material piece is formed by combining these covering pieces together with a covering material piece.

  In the method for manufacturing a covering material according to claim 14 of the present invention, the heat insulating sheet is inserted into a mold formed in a half box shape or a half cylinder shape having a curved molding surface, and is press-worked to form a half shape. Forming the covering material piece and combining the covering pieces to form the covering material facilitates the molding process and shortens the manufacturing time.

  According to a fifteenth aspect of the present invention, there is provided a coating material manufacturing method in which a heat insulating sheet is heated before or during pressing.

  In the manufacturing method of the coating | covering material which concerns on Claim 15 of this invention, it becomes easy to process a heat insulation sheet by being made to heat before press processing or at the time of press processing.

  In the method for manufacturing a covering material according to claim 16 of the present invention, after the heat insulating sheet is heated to room temperature or 80 degrees Celsius or more, the molding surface is formed into a half box shape or half cylinder shape having a curved surface. Inserted into a mold and pressed at room temperature or higher.

  In the coating material manufacturing method according to claim 16 of the present invention, the heat insulating sheet is heated to room temperature or 80 degrees Celsius or more, and then the molding surface is formed into a half box shape or half cylinder shape having a curved surface. By inserting into the mold and pressing at a temperature above room temperature, the final product can be cooled quickly after processing, improving work efficiency.

  The construction method of the covering material which concerns on Claim 17 of this invention attaches to the 1st process of attaching the covering material of any one of Claim 9 thru | or 12 to a construction object, and hold | maintaining it. A second step of covering the outer surface of the covering material that is applied and held with a heat-shrinkable holding material having waterproof and moisture-proof properties, and hot air is blown on the heat-shrinkable holding material covered on the covering material to shrink the holding material And a third step of attaching the covering material to the construction object.

  In the construction method of the coating | covering material which concerns on Claim 17 of this invention, the 1st process of attaching the coating | covering material of any one of Claim 9 thru | or 12 to a construction object, and attaching to a construction object A second step of covering the outer surface of the covering material that is applied and held with a heat-shrinkable holding material having waterproof and moisture-proof properties, and hot air is blown on the heat-shrinkable holding material covered on the covering material to shrink the holding material Since the third step of attaching the covering material to the construction object is improved, the work efficiency is improved, and the covering material is protected by a heat-shrinkable holding material having waterproof and moisture-proof properties. Even if it is a coating object around water, the life of the coating material can be extended.

  The heat insulating sheet according to the present invention has a three-layer structure including a first and second outer layer composed of a pair of stretchable cloth materials and an intermediate layer of an elastic resin layered between the two outer layers and including a heat insulator. Therefore, the heat insulating property is improved, the thickness of the heat insulating sheet is reduced, and the cost can be reduced and the workability in a narrow work space can be improved. Moreover, elastic deformation and extensibility increase, and it can be made to adhere | attach firmly also on the covering object of a complicated shape. Furthermore, the sound absorption is improved and it can be used as a soundproofing material, and the application can be expanded.

  The heat insulating sheet according to the present invention includes a first outer layer composed of a stretchable cloth material, a second outer layer composed of a nonwoven fabric having a stretchable and heat-fusible material, and both the outer layers. It has a three-layer structure with an intermediate layer that is laminated between and a non-woven fabric containing a heat-fusible material impregnated with an elastic resin containing a heat insulator, so that the heat insulation is improved and the thickness of the heat insulation sheet is reduced. Therefore, it is possible to reduce the cost and improve the workability in a narrow work space. Moreover, elastic deformation and extensibility increase, and it can be made to adhere | attach firmly also on the covering object of a complicated shape. Furthermore, the sound absorption is improved and it can be used as a soundproofing material, and the application can be expanded.

  Furthermore, the heat insulating sheet according to the present invention is laminated between the first and second outer layers composed of a pair of nonwoven fabrics having extensibility and containing a heat-fusible material, and heat-fusible. Since it has a three-layer structure with an intermediate layer impregnated with an elastic resin containing a heat insulator in a non-woven fabric containing materials, the heat insulation is improved, the thickness of the heat insulation sheet is reduced, and the cost is reduced and in a narrow work space The workability can be improved. Moreover, elastic deformation and extensibility increase, and it can be made to adhere | attach firmly also on the covering object of a complicated shape. Furthermore, the sound absorption is improved and it can be used as a soundproofing material, and the application can be expanded.

  The method for producing a heat insulating sheet according to the present invention includes a first step of forming an elastic resin layer by applying and drying an elastic resin liquid containing a heat insulator on one surface of an extensible cloth material, and the extensible cloth. Another stretchable cloth material is laminated and fused on the surface of the elastic resin layer side of the material, and the first and second outer layers are constituted by the pair of stretchable cloth materials, and a heat insulator is provided between these two outer layers. Since it has a second step of forming a three-layer structure by laminating an intermediate layer of elastic resin, it has a high heat insulation soundproofing performance and molding performance, and a simple heat insulation sheet with high followability to deformation The cost can be reduced through a simple process.

  In addition, the method for producing a heat insulating sheet according to the present invention includes a first step of applying a liquid of an elastic resin containing a heat insulating material to a nonwoven fabric containing a heat-fusible material, and drying and impregnating the nonwoven fabric. A stretchable cloth material is laminated on one side and another non-woven fabric containing a heat-fusible material having extensibility on the other side. The first outer layer is made of the stretchable cloth material and the other non-woven fabric is made of the non-woven fabric. 2 outer layers and a second step of laminating an intermediate layer of nonwoven fabric impregnated between these two outer layers to form a three-layer structure, so that high heat insulation soundproofing performance and molding performance In addition, it is possible to obtain a heat insulating sheet that is soft in appearance and highly conformable to deformation in a simple process, and can reduce costs. Furthermore, the appearance is soft, so that the appearance is soft and the touch is soft. In addition, when a thick or brushed nonwoven fabric is used, the fabric contains air, and the heat insulation performance is improved.

  Furthermore, the method for manufacturing a heat insulating sheet according to the present invention includes a first step of applying a liquid of an elastic resin containing a heat insulating material to a nonwoven fabric containing a heat-fusible material, and drying and impregnating the nonwoven fabric. Non-woven fabric impregnated between these two outer layers, with another non-woven fabric having extensibility on both sides and including a heat-sealable material stacked and fused to form the first and second outer layers. The intermediate layer is laminated to have a second step with a three-layer structure, so it has high heat insulation and soundproofing performance and molding performance, as well as a simple heat insulation sheet with soft appearance and high followability to deformation. The cost can be reduced through a simple process. Since the stretchable layer is formed of a soft and extensible cloth material on the outside of the heat insulating sheet, the followability to deformation is increased and the adhesion to the heat insulating object is improved. For this reason, construction efficiency improves. The strength is improved by laminating the nonwoven fabric on both surfaces of the intermediate layer. Furthermore, the appearance is soft, so that the appearance is soft and the touch is soft. In addition, when a thick or brushed nonwoven fabric is used, the fabric contains air, and the heat insulation performance is improved.

  The covering material according to the present invention is obtained by molding the heat insulating sheet according to any one of claims 1 to 4 according to the shape of the object to be coated, so that an outer layer having extensibility is formed outside the covering material. Laminating improves molding performance, increases elasticity and extensibility, and improves followability to deformation, so even if the molded coating material does not perfectly match the object to be coated, As long as the shape is ensured, both ends of the covering material can be pulled and securely adhered to the object to be covered. For this reason, construction efficiency improves. Moreover, since it can be used even if the molded covering material does not completely match the shape of the object to be coated, it is not necessary to mold into various shapes, and waste can be saved. Furthermore, the sound absorption is improved and it can be used as a soundproofing material, and the application can be expanded.

  The manufacturing method of the coating material which concerns on this invention is the normal temperature or more after heating the heat insulation sheet manufactured by the method of any one of Claim 5 thru | or 8 at room temperature or according to the shape of coating object. Press processing (cold press processing and hot press processing) at a temperature, and punched and processed stamped semi-finished products, so that it has high heat insulation soundproofing performance and molding performance, and also follows deformation A high covering material can be obtained by a simple process, and the cost can be reduced.

  The covering material construction method according to the present invention includes a first step of attaching and holding the covering material according to any one of claims 9 to 12 to the construction object, and holding and attaching the covering material to the construction object. A second step of covering the outer surface of the coated covering material with a heat-shrinkable holding material having waterproofness and moisture-proofing, and blowing the hot air onto the heat-shrinkable holding material covered on the covering material to shrink the holding material to cover the covering material Since it has the 3rd process which attaches to construction object, attachment work is made efficient and lifetime improvement of a covering material is achieved.

  A stretchable cloth material is coated with an elastic resin liquid containing a heat insulator, dried, and another cloth material with stretchability is laminated and fused on both sides of the impregnated cloth material. An intermediate layer made of an elastic resin including a heat insulator is laminated between the materials to produce a heat insulating sheet having a three-layer structure, and the heat insulating sheet is heated and pressed into a desired shape, and punching is performed to obtain a covering material. Realized by getting.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. FIG. 1 is a sectional view showing a heat insulating sheet according to the first embodiment of the present invention. As shown in FIG. 1, the heat insulating sheet 2 according to the present example was laminated between a first and second outer layer composed of a pair of extensible cloth materials 4 and 5 and both the outer layers 4 and 5. It has a three-layer structure with the intermediate layer 3. The intermediate layer 3 is formed by applying a liquid of an elastic resin 7 including a heat insulator 6 to one surface of one of the extensible cloth materials 4 and 5 and drying the hardened elastic resin 7. It is comprised by the layer of the elastic resin containing the heat insulating body 6 formed in this way. First, the heat insulating sheet 2 includes a heat insulating body 6 on one extensible cloth material 4, a liquid of an elastic resin 7 is applied and dried, and a layer of the elastic resin 7 which becomes the intermediate layer 3 on one surface of the extensible cloth material 4. Form. Then, the other extensible cloth material 5 is overlapped on the surface of the extensible cloth material 4 on the elastic resin 7 side and fused, and the elastic resin 7 is cured between the first and second outer layers 4 and 5. The heat insulating sheet 2 having a three-layer structure is obtained by laminating the layers 3.

  The liquid of the elastic resin 7 here means styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), olefin elastomer resin, styrene elastomer resin, urethane elastomer resin, polyester elastomer resin, polyamide or It is a dispersion of any one of aramid elastomer resins or a mixture containing one or more of these. Insulation 6 described later is blended in such a dispersion of elastic resin 7, and a curing catalyst such as cumyl peroxyneodecanoate or benzoyl peroxide is blended if necessary, and a resin in which these are blended The mixed liquid is solidified or cured to form the intermediate layer 3. In order to further improve the dispersibility, the elastic resin 7 dispersion may contain a small amount of a silicon surfactant as a dispersion aid, or a phosphorus flame retardant to increase the flame retardancy. Also good. The elastic resin 7 blended as described above exhibits sufficient elasticity after curing or solidification, as is clear from the test results described later, and exhibits high followability to deformation in combination with the stretchable layers 4 and 5. It was.

  The heat insulator 6 includes a foamed hollow bead 6A that has an outer shell made of synthetic resin and seals a gas generated inside by heat, or an outer shell made of an inorganic material having heat resistance and fire resistance. The closed cell hollow beads 6B are sealed.

  The foamable hollow beads 6A are configured such that the outer skin of the resin encloses fine particles containing a hydrocarbon such as heptane (low boiling point hydrocarbon, sublimation material) or a foaming agent. Resin that expands by being softened by the heat of the outer shell can be any of phenolic resin, vinylidene chloride / acrylonitrile copolymer, vinylidene chloride / acrylic copolymer, acrylic copolymer, or vinyl chloride copolymer. Or consists of one. The foamable hollow beads 6A are gasified by foaming an internal low-boiling hydrocarbon or foaming agent in the heating step, and a soft synthetic resin skin seals the gas inside. That is, the expandable hollow beads 6A are expanded by expanding low-boiling hydrocarbons or foaming agents encapsulated by heating, while the resin forming the outer shell is softened to seal and confine the expanded gas. By comprising in this way, the foamable hollow bead 6A is formed as a foam which each has independent heat insulation.

  The fine particles of such expandable hollow beads 6A form a heat insulating layer with low thermal conductivity because the resin that foams and forms an outer shell at 80 degrees Celsius or higher forms hollow beads with excellent gas barrier properties and sealing properties. It is supposed to be. The elastic resin layer having the hollow beads 6A, that is, the intermediate layer 3 has a thermal conductivity of 0.021 to 0.028 W / m · K as a result of the experiment, although it depends on the foaming conditions.

  The closed-cell hollow beads 6B are constituted by a fine particle hollow body made of an organic balloon or an inorganic balloon. The organic balloon may be composed of a phenol resin balloon, and the inorganic balloon may be composed of any one of a glass balloon, an alumina balloon, a silica alumina balloon, a silica balloon, a shirasu balloon, and a carbon balloon. By comprising in this way, while heat resistance and fireproof property improve, the low thermal conductivity substantially the same as the said foamable hollow bead 6A is obtained.

  The blending ratio of the heat insulating body 6 and the elastic resin 7 is determined by the coating amount of the elastic coat resin to be impregnated and the thickness of the heat insulating layer, but the heat insulating body 6 (expandable hollow beads 6A or closed cells) is determined by the solid content mixing ratio. Hollow beads 6B): The resin 7 having elasticity is preferably blended in the range of 20:80 to 50: 50% by weight. The elastic coat resin here refers to a dispersion of resin 7 having elasticity in which foamable beads 6A and 6B are blended.

The extensible fabrics 4, 5, and 14 have flame retardant elastic polyester fiber, polyamide fiber, or elastic fiber made of ester type or ether type urethane resin as a core yarn, and this is processed by a single card or double card method. In the X direction (one direction) or the XY direction (directions orthogonal to each other) with a thickness of 0.05 to 2.0 mm and an elongation of 10% or more. One-way fabric type base fabrics 4A and 5A or two-way fabric type base fabrics 4B and 5B are formed. The fabric-type base fabrics 4A, 4B, 5A, and 5B are made of a heat-fusible material, but may be made to contain a heat-fusible material. In the case of the two-way fabric-type base fabrics 4B and 5B that extend (or expand and contract) in the XY direction, they can be deepened as compared to those in one direction.
The JIS for elongation is as follows. The fiber is based on JIS L1030 “chemical fiber filament yarn test method” and the fabric is based on JIS L1018 “knit fabric test method”.

  The preferred thickness of the extensible cloth materials 4A, 4B, 5A, and 5B is set to 0.05 to 2.0 mm. When the heat insulating sheet 2 is formed into a three-dimensional shape when it is thinner than 0.05 mm, This is because the tear strength that can withstand the tension applied to the cloth material is not sufficient, and it becomes difficult to produce a coating material, which will be described later, having a good external appearance. On the other hand, if the cloth materials 4A, 4B, 5A, and 5B are made thicker than 2.0 mm, the tear strength is sufficient, but the covering material that is processed into a desired shape by forming the heat insulating sheet 2 into a three-dimensional shape is thinly insulated. This is because the intermediate layer 3 is made thin for coating, and as a result, satisfactory heat insulation performance may not be obtained. This is because if the intermediate layer 3 is thickened in order to obtain satisfactory thermal insulation performance, the overall thickness of the thermal insulation sheet 2 is increased, which makes it difficult to use when covering a pipe installed in a narrow space for thermal insulation. Therefore, the range of 0.05 to 2.0 mm including the thickness of the non-impregnated layer is preferable as the thickness of the extensible cloth materials 4A, 4B, 5A and 5B, more preferably the range of 0.1 to 1.0 mm. Is appropriate. And it became clear from the test result mentioned later that even if the stretchable layers 4 and 5 are such thin walls, the followability to deformation is high.

Further, as will be described later, one or both of the extensible cloth materials 4 and 5 may be constituted by an extensible polyester nonwoven fabric 10 (see FIGS. 2 and 3) containing heat-fusible fibers. That is, the stretchable polyester nonwoven fabric 10 has a thickness of 0.05 to 3 including the thickness of an unimpregnated layer containing a heat-fusible fiber made of polyamide or polyolefin resin having a melting point of 80 to 160 ° C. alone or a composite resin. .0Mm, a nonwoven fabric made of polyester fibers having a basis weight of 20 to 200 g / ^{m 2,} preferably appropriate 0.1 to 2.0 mm, the range of basis weight 40~150g / ^{m 2.} As the heat-fusible fiber, a fiber made of polycaprolactam-based polyamide resin, polybutylene succinate / adipate resin, polylactic acid, polyethylene / polypropylene composite resin and having a melting point in the range of 80 to 160 ° C. is used. When the thickness of the nonwoven fabric is less than 0.05 mm, when the heat-insulating sheet 2 is molded into a three-dimensional shape, the tearing strength that can withstand the tension applied to the non-woven fabric is not sufficient, and a three-dimensional shape coating material having a good appearance will be described later. It becomes difficult. On the other hand, if the nonwoven fabric is made thicker than 3.0 mm, the tear strength is sufficient. As a result, satisfactory thermal insulation performance cannot be obtained. This is because if the intermediate layer 3 is thickened in order to obtain satisfactory heat insulation performance, the overall thickness of the heat insulation sheet 2 is increased, and therefore it is difficult to use when covering a pipe installed in a narrow space to insulate. Accordingly, the thickness of the stretchable nonwoven fabric (stretchable polyester nonwoven fabric) 9, 10 including the thickness of the unimpregnated layer is preferably in the range of 0.05 to 3.0 mm, more preferably 0.1 to 2.0 mm. The range is reasonable.

  As described above, the heat insulating sheet 2 includes the first and second outer layers constituted by the pair of extensible cloth materials 4 and 5 and the heat insulating body 6 (6A and 6B) laminated between the outer layers 4 and 5. It has a three-layer structure with the intermediate layer 3 of the elastic resin 7 included.

  The heat insulating sheet 2 includes a movable tenter device (not shown) for spreading the base fabric (extensible cloth materials 4 and 5) or the polyester nonwoven fabric 10 and a coating device (not shown) such as a doctor knife or a double cut bar. And a continuous drive type coating equipment (not shown) having a heating furnace for drying and foaming at a temperature of 150 ° C. or lower.

  Specifically, the base resin stretched with a tenter is coated with a dispersion of the coating elastic resin 7 at a room temperature to a thickness of 100 to 300 μm, and the solvent or moisture is dried to a certain degree at a temperature of 100 ° C. or lower, followed by coating. Another base fabric is stacked on the outside so that the base fabric having the resin layer is on the inside, and is heat-sealed at a temperature of 100 ° C. or higher to obtain a stretchable heat insulating sheet 2 having a three-layer structure. ing.

  For example, in the case of the heat insulating sheet 2 shown in FIG. 1, the base cloth (extensible cloth material) 4 extended with a tenter is coated with a coating elastic resin 7 in which a heat insulating body 6 is blended at a room temperature to a thickness of 100 to 300 μm. The solvent or water is dried to some extent at a temperature of 100 ° C. or lower. Subsequently, the other base fabric (extensible fabric material) 5 is stacked on the surface of the base fabric 4 on the layer side of the elastic resin 7, and is heat-sealed at a temperature of 100 ° C. or higher to form a stretchable heat insulating sheet having a three-layer structure. 2 is manufactured. The extensible cloth materials 4 and 5 serving as both outer layers are not impregnated with the elastic resin 7, and non-impregnated layers (unimpregnated layers) 4M and 5M are secured. When foamable hollow beads 6A are used for the heat insulator 6, when heat-sealing, gas is generated inside by heat, and the generated gas is sealed by a synthetic resin outer shell. .

  Next, the manufacturing method of the heat insulation sheet which concerns on the said 1st Example is demonstrated. In the method for manufacturing the heat insulating sheet 2 according to the above embodiment, as shown in FIG. 4, first, in one of the first steps, the one stretchable cloth material (fabric-type base cloth) 4 (4A, 4B) is insulated. The liquid of the elastic resin 7 in which the body 6 (6A, 6B) is blended is applied and dried at a predetermined temperature (for example, a temperature of 100 degrees centigrade or less) (step S1). After drying, next, in the second step, the other extensible cloth material 5 (5A, 5B) is superimposed on the surface of the elastic resin 7 layer side of the one extensible cloth material 4 and pressure-bonded. Heating is performed by heating at a melting temperature (for example, 100 degrees Celsius or higher) of the adhesive fiber (step S2). The heat insulating sheet 2 manufactured in this manner includes both outer layers 4 and 5 composed of a pair of extensible cloth materials 4 and 5 and a heat insulating body 6 (6A and 6B) laminated between the outer layers 4 and 5. It has a three-layer structure with an intermediate layer 3 made of an elastic resin 7. Since the heat insulating body 6 (6A, 6B) is included in the elastic resin of the intermediate layer 3, the heat insulating performance is improved, and the outer layers 4 and 5 having extensibility are formed on both surfaces of the elastic intermediate layer 3. Since it is formed, molding performance is improved, elasticity and extensibility are increased, followability to deformation is increased, and adhesion to a heat insulating object is improved. For this reason, construction efficiency improves. Further, since the cloth materials 4 and 5 are laminated on both surfaces of the intermediate layer 3, the strength is improved and the soundproofing performance is also improved. When the elastic resin 7 includes the expandable hollow beads 6A that are foamed by heating as the heat insulating body 6 to become the heat insulating foam, the low boiling point hydrocarbon or the foaming agent contained in the hollow beads 6A at the time of heating is also gas. Then, the outer shell of the soft resin expands and confines the gas inside, and a heat insulating foam with high heat insulating properties is formed. When the closed cell hollow beads 6B are included as the heat insulator 6, the heat resistance is improved in addition to the heat insulation.

  In the first embodiment, the elastic resin layer 7 is formed only on the first outer layer 4 side. However, the present invention is not limited to this, and the elastic resin layer is formed on both the first and second outer layers. 7 may be formed.

  Next, the heat insulating sheet 12 according to the second embodiment of the present invention will be described. The heat insulating sheet 12 according to the present embodiment is the same as that of the heat insulating sheet 2 according to the first embodiment except that the stretchable cloth materials 4 and 5 constituting the outer layers are fabric-type base cloths 4A, 4B and 5A, 5B, respectively. In contrast, one outer layer is made of a stretchable cloth material 14 and the other outer layer is made of a polyester nonwoven fabric 10 containing a heat-fusible fiber, and is laminated between these two outer layers. The difference is that the layer 13 is an elastic resin layer in which a polyester nonwoven fabric M1 containing heat-fusible fibers is impregnated with an elastic resin 7 containing a heat insulator 6 (6A, 6B). That is, as shown in FIG. 2, the heat insulating sheet 12 according to the second embodiment includes a first outer layer 14 composed of a stretchable cloth material 14 and a nonwoven fabric that has a stretchable and heat-fusible material. 10 and a non-woven fabric M1 including a heat-fusible material, impregnated with an elastic resin 7 including a heat insulator 6 (6A, 6B). It has a three-layer structure with the intermediate layer 13. The intermediate layer 13 is applied with a dispersion of the elastic resin 7 in which the heat insulating body 6 (6A, 6B) is blended with the polyester nonwoven fabric M1, dried, and impregnated.

  Specifically, the stretchable cloth material 14 (4A, 4B) is applied in a stretched state with a liquid of the elastic resin 7 in which the heat insulating body 6 (6A, 6B) is blended at room temperature, and a predetermined temperature (for example, 100 degrees Celsius or less). The elastic resin 7 layer is formed on one surface of the extensible cloth material 14. On the other hand, the heat insulating body 6 (6A, 6B) is formed on a polyester nonwoven fabric M1 having a thickness of 0.05 to 3.0 mm containing a heat-fusible fiber made of polyamide or polyolefin resin having a melting point of 80 to 160 ° C. alone or a composite resin. The liquid of the blended elastic resin 7 is applied at room temperature, and then dried at a temperature of, for example, 100 degrees centigrade or less, so that the polyester nonwoven fabric M1 is impregnated with the elastic resin 7. Next, the surface of the elastic fabric 7 of the stretchable cloth material 14 is layered on one surface of the impregnated polyester nonwoven fabric M1, and another polyester nonwoven fabric 10 not impregnated on the other surface is laminated and heat-bonded. Thus, the heat insulating sheet 12 having a three-layer structure is manufactured. In the extensible sheet 12 manufactured in this way, the first outer layer 14 has an unimpregnated layer 14M and the second outer layer 15 has an unimpregnated layer 15M.

  In the manufacturing method of the heat insulating sheet 12 according to the second embodiment, in the first step, the liquid of the elastic resin 7 including the heat insulating body 6 (6A, 6B) is applied to the nonwoven fabric M1 including the heat-fusible material. And dried at a predetermined temperature (for example, a temperature of 100 degrees centigrade or less). On the other hand, the liquid of the elastic resin 7 in which the heat insulating body 6 (6A, 6B) is blended is applied to one surface of the stretchable cloth material 14 at room temperature, and dried at a temperature of, for example, 100 degrees Celsius or less. A layer of elastic resin 7 is formed on the substrate (step S11). Next, in the second step, the surface of the elastic resin 7 of the stretchable cloth material 14 serving as the first outer layer is superposed on one surface of the impregnated polyester nonwoven fabric M1, and the second outer layer is placed on the other surface. The non-impregnated non-impregnated polyester non-woven fabric 10 is stacked, and the super-extensible stretch fabric material 14, the impregnated non-woven fabric M1 and the non-impregnated non-woven fabric 10 (second outer layer 15) are pressed and heated. The intermediate layer 13 of the nonwoven fabric M1 which is fused and impregnated between the outer layers 14 and 15 is laminated to form a three-layer structure. In the second embodiment, the layer of the elastic resin 7 is formed on the extensible cloth material 14 in the first step, but the present invention is not limited to this. The layer of the resin 7 may not be formed, and may be overlapped and fused on the impregnated nonwoven fabric M1. That is, in the first step, the non-woven fabric M1 containing the heat-fusible material is coated with the liquid of the elastic resin 7 containing the heat insulator 6 (6A, 6B), dried and impregnated. In the second step, the impregnation is performed. A stretchable cloth material 14 having no elastic resin layer on one surface of the nonwoven fabric M1 and another nonwoven fabric 10 having a stretchability and containing a heat-fusible material are laminated and fused on the other surface, respectively. 14 constitutes a first outer layer, and another nonwoven fabric 10 constitutes a second outer layer 15, and an intermediate layer 13 of nonwoven fabric M1 impregnated between these outer layers 14 and 15 is laminated to form a three-layer structure. You may do it.

  Next, the heat insulating sheet 22 according to the third embodiment of the present invention will be described. The heat insulation sheet 22 according to the second embodiment is the same as the heat insulation sheet 12 according to the second embodiment except that the first outer layer 14 is made of fabric-type extensible cloth materials 4A and 4B including a heat-fusible material. The outer layer 15 is composed of the stretchable polyester nonwoven fabric 10, whereas both the outer layers 24 and 25 are composed of the polyester nonwoven fabric 10. That is, as shown in FIG. 3, the heat insulating sheet 22 according to the third embodiment includes the first and second outer layers 24 and 25 constituted by the stretchable polyester nonwoven fabric 10, and the outer layers 24 and 25. It has a three-layer structure with an intermediate layer 23 that is laminated between them and impregnated with an elastic resin 7 containing a heat insulator 6 (6A, 6B) on a nonwoven fabric M1 containing a heat-fusible material. The intermediate layer 23 is applied with a dispersion of the elastic resin 7 in which the heat insulating body 6 (6A, 6B) is blended with the polyester nonwoven fabric M1, dried, and impregnated.

  Specifically, a polyester nonwoven fabric M1 having a thickness of 0.05 to 3.0 mm containing heat-fusible fibers made of polyamide or polyolefin resin having a melting point of 80 to 160 ° C. alone or a composite resin is held in a stretched state. Apply a thin solution of the elastic resin 7 in which the heat insulating body 6 (6A, 6B) is blended on the polyester nonwoven fabric M1 to one side at room temperature (thickness: 100 to 300 μm), and then dry at a temperature of, for example, 100 degrees Celsius or less. The polyester nonwoven fabric M1 is impregnated with the elastic resin 7. On the other hand, another polyester nonwoven fabric 10 is held in a stretched state, and a liquid of the elastic resin 7 in which the heat insulating body 6 (6A, 6B) is blended is thinly applied to the polyester nonwoven fabric 10 at a normal temperature (thickness: 100 to 300 μm). Subsequently, the polyester nonwoven fabric 10 is impregnated with the elastic resin 7 by drying at a temperature of, for example, 100 degrees Celsius or less. Next, the surface of the layer of the elastic resin 7 of another polyester nonwoven fabric 10 and the other polyester nonwoven fabric 10 not impregnated on the other surface are stacked on one surface of the impregnated polyester nonwoven fabric M1, and heat-sealed. Thus, the extensible sheet 22 having a three-layer structure is manufactured. In the heat insulating sheet 22 manufactured in this manner, an unimpregnated layer 24M is secured on the first outer layer 24, and an unimpregnated layer 25M is secured on the second outer layer 25.

  The extensible heat insulating sheets 2, 12, and 22 obtained in each of the above steps can be rolled and sliced to a desired width by a multi-cutter and processed into a tape shape. Furthermore, by applying a release paper and an adhesive such as butyl rubber to the outer skin of the extensible heat insulating sheet in the same manner as in the normal adhesive processing, an extensible heat insulating soundproof sheet subjected to the adhesive processing can be manufactured. This tape-like stretchable heat insulating soundproofing sheet can be coated with good adhesion using the stretchability of the tape as a heat insulating soundproofing coating material for pipes having a relatively complicated shape.

  In the manufacturing method of the heat insulating sheet 22 according to the third embodiment, in the first step, the liquid of the elastic resin 7 including the heat insulating body 6 (6A, 6B) is applied to the nonwoven fabric M1 including the heat-fusible material. And dried at a predetermined temperature (for example, a temperature of 100 degrees centigrade or less). On the other hand, the liquid of the elastic resin 7 in which the heat insulating body 6 (6A, 6B) is blended is applied to one surface of the polyester nonwoven fabric 10 to be the outer layer 24 at one room temperature to form a layer of the elastic resin 7 (step S21). . Next, in the second step, the surface on the layer side of the elastic resin 7 of the nonwoven fabric 10 to be the first outer layer 24 is superimposed on one surface of the impregnated polyester nonwoven fabric M1, and the second outer layer 25 is formed on the other surface. Another non-impregnated polyester nonwoven fabric 10 having extensibility is layered, and the nonwoven fabric 10 (first outer layer 24) having the superimposed elastic resin layers, the impregnated nonwoven fabric M1, and the non-impregnated nonwoven fabric 10 (second The outer layer 25) is pressure-bonded and heat-sealed, and the intermediate layer 23 of the nonwoven fabric M1 impregnated between the outer layers 24 and 25 is laminated to form a three-layer structure. In the third embodiment, the layer of the elastic resin 7 is formed on the nonwoven fabric 10 to be the first outer layer 24 in the first step, but the present invention is not limited to this. The outer layer 24 may not be formed with the elastic resin layer 7, but may be laminated and fused on the impregnated nonwoven fabric M1. That is, in the first step, the non-woven fabric M1 containing the heat-fusible material is coated with the liquid of the elastic resin 7 containing the heat insulator 6 (6A, 6B), dried and impregnated. In the second step, the impregnation is performed. Another nonwoven fabric 10 that is not impregnated on both sides is laminated and fused on both sides of the nonwoven fabric M1, and the nonwoven fabrics 10 and 10 constitute a first and second outer layer, and between these outer layers 24 and 25. The intermediate layer 23 of the impregnated nonwoven fabric M1 may be laminated to form a three-layer structure.

  Thus, in the manufacturing method of the heat insulation sheet which concerns on the said 1st thru | or 3rd Example, it has the part which is not impregnated in a 2nd process, forming the impregnated intermediate | middle layer in a 1st process. An intermediate layer is laminated between extensible outer layers. For this reason, in the heat insulation sheets 2, 12, and 22 which concern on the said Example, the heat insulation performance per unit thickness and sound insulation performance are improved, it aims at thickness reduction, and the followability to a deformation | transformation also to the construction object of a complicated three-dimensional shape It is possible to improve the adhesion by improving the construction efficiency.

  Next, a covering material according to a fourth embodiment of the present invention will be described. As shown in FIGS. 6A to 6D, the covering material 30 according to the fourth embodiment of the present invention includes the heat insulating sheets 2, 12, 22 (thicknesses) according to the first to third embodiments. 0.1 to 6.0 mm) of the structure 31 is formed into a desired three-dimensional shape. The covering material 30 is preferably molded into a three-dimensional shape or a cylindrical shape having a curved surface according to the shape of the object to be covered. For this reason, the covering material 30 is formed by forming the structure 31 into a half-cylindrical shape or a half-box shape, and combining and joining the covering material pieces 31A-31A and 31B-31B formed in a half shape. It is configured. A paper mold 40 molded according to the shape of at least a part of the surface is attached to the surface of the molded covering material 30. When the covering material 30 is molded into a half-cylindrical cylindrical shape, the half-cylindrical covering material piece 31A is molded on the end 32, 33 side in the longitudinal direction according to the shape on the end 32, 33 side. The paper molds 40A and 40B are attached. The covering material 30 not only has the performance of the heat insulating sheets 2, 12, and 22, that is, the heat insulating performance, the soundproof performance, the follow-up performance against deformation, the adhesion performance to the object to be coated, and the construction performance, but also has a desired three-dimensional shape. Even if the molded covering material 30 does not completely match the construction object to be coated, as long as the general shape is secured, the covering material pieces 31A and 31B are pulled to cover both ends. It is possible to ensure close contact with the object. For this reason, construction efficiency improves. Moreover, since it can be used even if it does not completely match the shape of the object to be coated covered by the molded covering material 30, it is not necessary to mold into various shapes, and waste can be saved.

Next, a method for manufacturing a coating material according to the fourth embodiment of the present invention will be described. In the manufacturing method of the covering material 30 according to the fourth embodiment, as shown in FIG. 7, first, in the first step,
(1) Is it one side of the extensible cloth material 4 (first outer layer 4) (refer to the first example) or (2) Is the polyester nonwoven fabric M1 (intermediate layers 13, 23) (refer to the second example)? ), A dispersion of the elastic resin 7 in which the heat insulating body 6 is blended is applied and dried at a temperature of 100 degrees Celsius or less (see Steps S1 (S11, S21)). After drying, in the second step, the first outer layers 4, 14, 24 and the second outer layers 5, 15, 25 are then stacked and pressure-bonded with the coated and impregnated elastic resin side facing inside, The structure 31 of the heat insulating sheets 2, 12, and 22 is formed by heating and heat-sealing at a melting temperature of the heat-fusible fiber, for example, 100 ° C. or more (steps S 2 (S 12 and S 22)).

  Next, in the third step, the structures 31 corresponding to the heat insulating sheets 2, 12, and 22 are preliminarily reserved for a predetermined time (1 minute) at a predetermined temperature (150 degrees Celsius) in the infrared heating furnace 50 shown in FIG. Next, the preheated structure 31 is inserted into the cold press 51A (see FIG. 8), press-formed for a predetermined time (30 seconds), formed into a three-dimensional shape, and demolded. (Step S104 (S104A)). In the cold press 51A, a male mold plate is mounted on the upper movable plate, and a female mold plate is mounted on the lower fixed plate with a clearance of 3 mm. Alternatively, the structure 31 corresponding to the heat insulating sheets 2, 12, and 22 is inserted into a hot press 51B (heated to 80 ° C. or more) at room temperature without preheating, press-formed for a predetermined time (30 seconds), cooled, and then removed. (Step S104 (S104B)). The hot press 51B has the same configuration as the cold press 51A. In the molding process by the hot press 51B, the appearance is softer than that of the cold press 51A. In other words, the nonwoven fabric gives a soft feeling, and the non-woven fabric has a fluffy shape because a part of the fibers deformed into a curved surface by pressing is slightly raised to the outside and becomes fluffy. In addition, when a thick or brushed nonwoven fabric is used, the fabric contains air, and the heat insulation performance is improved. After demolding, next, the structure 31 continuously connected and formed into a three-dimensional shape is punched by a punching machine (not shown), and a box-shaped three-dimensional covering material piece 31B as shown in FIG. A half-cylinder-shaped covering material piece 31A as shown in FIG. 6C is manufactured (step S105). Furthermore, the manufactured covering material pieces 31A and 31B are taped with a butyl rubber adhesive on the portion 35 to which the ends are joined (step S106). Note that the tape processing may or may not be performed as necessary in order to improve workability.

  The covering material 30 manufactured in this way seems to wrap the covering object in pairs by holding each of the covering material pieces 31A, 31A or 31B, 31B by attaching them to the outer surface of the covering object, and joining the joint portions 35 at the ends to each other. Can be attached. Further, in order to improve the strength of each of the covering material pieces 31A, 31A or 31B, 31B, the end portions 32, 33 are arranged on the end portions 32, 33 in the longitudinal direction of the half cylindrical covering material piece 31A. The paper molds 40A and 40B that have been molded according to the shape on the side are attached. Thus, the covering material 30 manufactured by the manufacturing method according to the present embodiment can improve heat insulation, reduce the thickness of the covering material, reduce costs, and improve workability in a narrow work space. it can. Moreover, elastic deformation and extensibility increase, and it can be made to adhere | attach firmly also on the covering object of a complicated shape. Furthermore, the sound absorption is improved and it can be used as a soundproofing material, and the application can be expanded.

  As described above, the covering material 30 having a three-dimensional shape and excellent heat insulating and soundproofing properties according to the present invention has the heat insulating sheets 2, 12, and 22 according to the first to third embodiments as the infrared heating furnace 50. In this case, it is inserted into a cold press 51A (51) or a hot press 51B (51) equipped with a template for imparting a three-dimensional shape with or without preheating in advance, and the covering material piece 31A is formed into a three-dimensional shape by pressing. 31B is formed, and subsequently punched by a punching press machine (not shown) equipped with a punching die plate, for example, a desired three-dimensional box-shaped or half-shaped heat insulation performance and high soundproofing covering material 30 It is designed to be processed.

  Further, the box-shaped and half-cylindrical-shaped covering material pieces 31A and 31B are processed with an adhesive tape such as butyl rubber with release paper at the joint portion of the outer skin end portion, and the workability of these covering material pieces 31A and 31B is improved. Can also be increased. Further, the covering material pieces 31A and 31B may be joined together by a paper binding device (stapler (registered trademark)). Furthermore, it is preferable that the covering material pieces 31A and 31B are bonded together with an adhesive. In joining, a welder type hot melt is more preferable. Since such covering material pieces 31A and 31B are excellent in extensibility, heat insulation and soundproofing, they adhere to pipes having complicated shapes other than curved shapes, different diameter pipe joint elbows, T-shaped tubes and the like. Can be coated. Moreover, the shape-retaining property after coating construction is good, and it is possible to simply fix the coated shape without collapsing by simply bonding and fixing with an adhesive tape. As described above, in the covering material 30 according to the present embodiment, the heat insulation performance and the soundproof performance per unit thickness are improved to reduce the thickness, and even a complicated three-dimensional construction object has improved followability to deformation. Adhesion can be improved and construction efficiency can be improved.

  Next, a method for constructing a coating material according to a fifth embodiment of the present invention will be described. As shown in FIG. 9, when the covering material 30 according to the fourth embodiment is attached to the covering object, the method for applying the covering material according to the present embodiment is a heat made of a resin such as vinyl chloride resin or olefin resin. A shrinkable stretch tube (heat-shrinkable holding material) 60 is used. That is, in the first step, the covering material pieces 31A-31A and 31B-31B are attached to and held on the outer surface to be covered (step S201). Next, in the second step, a heat-shrinkable holding material is placed on the outer surface of the coating material 30 that is attached to and held by the coating target (step S202). Next, in the third step, hot air is blown onto the extending tube 60 covered with the covering material 30 with a hand dryer (not shown) to shrink the tube 60 and attach the covering material 30 to the object to be coated (step S203). Thus, in the coating material construction method according to the present embodiment, the heat-shrinkable stretched tube 60 is attached to the outside of the coating material 30 coated on the piping (covering object), and this tube 60 is used with a hand dryer. It is also possible to form a waterproof / moisture-proof outer skin on the covering material 30 by heating and shrinking. By such a method, the covering construction according to the site | part in which piping is installed can be performed efficiently. It is also possible to enlarge the application site. Further, since the extensible cloth material of the covering material 30 and the elastic resin layer can absorb sound vibrations, it is possible to perform the construction for the purpose of soundproofing.

Hereinafter, examples of the heat insulating sheet and the covering material actually manufactured and the results of the performance will be shown.
Expandable beads whose outer resin is a vinylidene chloride / acrylonitrile copolymer, and a binder resin in which a methyl methacrylate resin emulsion and a polyether type elastic urethane resin emulsion are mixed at a solid content ratio of 20:80 An elastic coating resin (concentration: 80 wt%, viscosity: 350 mPa · s) was obtained by mixing at a solid content ratio of 65:35.
An extensible base fabric (weight per unit area 90 g / m ² ) containing urethane elastic yarn was used. With the base fabric lightly spread, 200 g / m ² of the above-mentioned elastic coat resin is applied with a room temperature bar coater, the coat resin is dried at a temperature of 80 to 100 ° C., and then the elastic coat resin layer comes inside. As described above, a stretchable heat insulating sheet having a three-layer structure (hereinafter referred to as Experimental Example 1) was produced by superimposing two layers and performing thermocompression bonding and foaming at a temperature of 120 to 130 ° C.

Elastic coated resin <resin viscosity 41000 mPa · s> is obtained by adding 0.1 part by weight of a silicon-based dispersion aid at a weight ratio of 60:40 to foam hollow beads made of aluminosilicate microhollow bodies and nitrile rubber. It was.
With a stretchable base fabric made of polyester elastic yarn (75 g / m ² per unit area) lightly spread, 250 g of the above-mentioned elastic coating resin is applied at room temperature with a bar coater and dried at a temperature of 80 to 100 ° C. A stretchable heat insulating sheet (hereinafter, referred to as Experimental Example 2) having a three-layer structure was manufactured by stacking two layers so that the resin layer was on the inside and performing thermocompression bonding and foaming at a temperature of 120 to 130 ° C.
The viscosity of the resin is based on JIS K7117-1 “Plastic—Liquid, Liquid, Emulsion, or Dispersion Resin—A Method for Measuring Apparent Viscosity Using a Brookfield Rotational Viscometer”.

Polyester having a thickness of 2 mm and a basis weight of 130 g / m ² containing 30% by weight of a heat-fusible fiber made of a polyethylene / polypropylene composite resin and a stretchable base fabric (weight per unit: 75 g / m ² ) containing the polyester elastic yarn of Experimental Example 2. A non-woven fabric obtained by impregnating the elastic coated resin of Experimental Example 1 at 200 g / m ² at room temperature and drying at a temperature of 80 to 100 ° C. in a stretched state on the fiber non-woven fabric is layered so that the elastic resin layer is on the inside. A stretchable heat-insulating sheet having a three-layer structure (hereinafter referred to as Experimental Example 3) including an unimpregnated layer was produced by thermocompression bonding and foaming at a temperature of 5 ° C.

The thermal conductivity of the sheets obtained in Experimental Example 1, Experimental Example 2, and Experimental Example 3 was measured using a thermal conductivity measuring device (HC-D72 manufactured by Eihiro Seiki Co., Ltd.) according to the ASTM C-518 method.
Table 1 shows the composition, the thickness of the coating resin, the thickness of the stretchable heat insulating sheet after foaming, and the thermal conductivity measured at room temperature.

  The sheets of Experimental Examples 1, 2, and 3 in Table 1 showed good results in heat insulation and extensibility.

A heat insulation pipe (hereinafter referred to as pipe A) in which a stretchable heat insulation soundproof sheet obtained in Experimental Example 1 is wound around a 1.27 cm (0.5 inch) stainless steel pipe is left in an atmosphere of 20 ° C., and 60 in the pipe. Hot water at 0 ° C. was circulated, and when the temperature of the pipe skin became steady, the flow of hot water was stopped and stopped, and the temperature of the pipe skin 60 minutes later was measured.
A heat insulating pipe (hereinafter referred to as pipe B) in which a stretchable heat insulating soundproof sheet obtained in Experimental Example 3 is wound on a stainless steel pipe of 1.27 cm (0.5 inch) is left in an atmosphere of 20 ° C., and 60 in the pipe. Hot water at 0 ° C. was circulated, and when the temperature of the pipe skin became steady, the flow of hot water was stopped and stopped, and the temperature of the pipe skin 60 minutes later was measured.

For comparison, a heat-insulated pipe (hereinafter referred to as pipe C) covered with a commercially available polyethylene tube having a wall thickness of 8 mm (thermal conductivity 0.04 W / m · k) is left in an atmosphere of 20 ° C. The hot water was circulated, and when the temperature of the pipe outer shell became steady, the hot water flow was stopped and stopped, and the temperature of the pipe outer shell after 60 minutes was measured.
The piping A was 23 ° C., the piping B was 24 ° C., the piping C was 28 ° C., and the piping A and the piping B were excellent in heat insulation even when the coated thickness was smaller than the piping C.

Preliminarily heat the extensible heat insulating sheets of Experimental Examples 1, 2, and 3 in an infrared heating furnace set at a furnace temperature of 150 ° C., and then give a three-dimensional shape to the upper movable platen and the lower fixed platen. Insert a male-female template into a cold press fitted with a clearance of 3 mm, press-mold for 30 seconds to give a three-dimensional shape, and after demolding, punching is performed with a punching machine equipped with a punching plate that matches the shape. Thus, a three-dimensional heat insulating and soundproof coating material and a half-shaped three-dimensional cylindrical heat insulating and soundproof coating material were produced. Further, although not shown in the figure, tape processing with a butyl rubber adhesive was performed on the end joint portion.
An example of the manufacturing process is shown in FIG. 7, and the manufactured three-dimensional heat insulating and soundproofing covering material is shown in FIGS.

  In the process of Example 10, the split-type three-dimensional cylindrical criminal stretch heat insulation soundproofing coating material manufactured in accordance with the three-dimensional pipe including the different diameter joints with outer diameters of 5 mm and 8 mm is applied to the different diameter joint pipe. Coated well and covered. The covering material was firmly fixed with a butyl rubber pressure-sensitive adhesive tape processed at the end joint portion of the covering material.

  In the process of Example 10, a three-dimensional heat-insulating and sound-proof coating material produced in a prototype according to a three-dimensional steel plate (size: 900 mm × 900 mm) having a thickness of 0.6 mm was attached to the back surface of the steel plate with a butyl rubber adhesive. This steel plate was placed on the top of the box in a free state as the top plate of the box. Water was discharged by shower from the height of 3m in the center of the ceiling, and the noise level in the box was measured with a microphone installed inside the box. The steel plate without the backing material alone has a value of 84 dB, whereas the steel plate with the sheet attached has a value of 76 dB, which has a function of insulating rain sound and was effective as a soundproof coating.

  The three-dimensional stretchable heat-insulation and sound-proof coating material of the present invention adheres well to equipment and pipes with complex shapes, can be efficiently heat-insulated, can be thinly coated, and can be used for pipes placed in narrow spaces. Thermal insulation coating is also possible. Furthermore, the three-dimensional extensible thermal insulation and soundproofing coating material of the present invention has elasticity and absorbs impact sound, and prevents impact sound such as drainage sound and rain sound such as drain pipes and solid propagation sound. It also has a function to do.

  In the above embodiment, the coating material is pre-heated and then cold-pressed. However, the present invention is not limited to this, and heating may be performed during hot pressing. Cold pressing has the advantage that it can be removed immediately after processing and has high productivity. On the other hand, the hot press processing is cooled and removed from the mold after processing, so that the processing time is longer than the cold press processing, but there is an advantage that the shape of the product can be processed more sharply. In each of the above embodiments, both of the outer layers having extensibility laminated on the intermediate layer are made of an extensible material. However, the present invention is not limited to this. One of the outer layers is made of an extensible material, and the other May be made of a non-stretchable flexible material. Further, in the above embodiment, the elastic resin is applied and impregnated. However, the present invention is not limited to this. It is sufficient that the resin is impregnated, and the resin may be immersed and impregnated in the elastic resin. Needless to say. Moreover, in the said Example, although the cloth materials 4, 5, and 15 are comprised with the cloth material (extensible cloth material) which has a stretching property, it is comprised with the cloth material (stretchable cloth material) which has a stretching property. Is preferred.

  Insulating sheets and covering materials can be used not only as heat insulating materials but also as soundproofing materials.

It is an expanded sectional view showing the heat insulation sheet concerning the 1st example of the present invention. Example 1 It is an expanded sectional view showing the heat insulation sheet concerning the 2nd example of the present invention. (Example 2) It is an expanded sectional view showing the heat insulation sheet concerning the 3rd example of the present invention. (Example 3) It is explanatory drawing which shows the process of manufacturing the heat insulation sheet which concerns on the 1st thru | or 3rd Example of this invention. It is a flowchart which shows the manufacturing process of FIG. It is explanatory drawing which shows the coating | covering material which concerns on 4th Example of this invention, (A) thru | or (D) is a perspective view which respectively shows a box-shaped coating | covering material piece, The state which joined the box-shaped coating | covering material piece 1 is a perspective view showing a half-cylindrical covering material piece and a perspective view showing a state in which the half-cylindrical covering material piece is joined. (Example 4) It is a flowchart which shows the process of manufacturing the coating | covering material of FIG. It is explanatory drawing which shows the process of manufacturing the coating | covering material of FIG. It is explanatory drawing which shows the extending | stretching tube covered on the coating | covering material of FIG. (Example 5)

Explanation of symbols

2 Thermal insulation sheet 3 Intermediate layer 4, 5 Stretchable cloth material 7 Elastic resin

Claims (17)

  A heat insulating sheet characterized by having a three-layer structure of a first and second outer layer composed of a pair of extensible cloth materials and an intermediate layer of an elastic resin layered between both outer layers and including a heat insulator.   A first outer layer composed of a stretchable cloth material, a second outer layer composed of a non-woven fabric having extensibility and a heat-fusible material, and laminated between these two outer layers, heat-fusible A heat insulating sheet having a three-layer structure including an intermediate layer in which a nonwoven fabric containing a material is impregnated with an elastic resin containing a heat insulator.   A first and second outer layer composed of a pair of non-woven fabrics having extensibility and containing a heat-fusible material, and an elastic material that is laminated between the two outer layers and includes a heat insulator in the non-woven fabric containing the heat-fusible material. A heat insulating sheet having a three-layer structure with an intermediate layer impregnated with a resin.   The heat insulation sheet according to any one of claims 1 to 3, wherein the outer layer extends in one direction or two different directions.   A first step of applying an elastic resin solution including a heat insulator to one surface of the stretchable cloth material and drying it to form an elastic resin layer; and another surface on the elastic resin layer side of the stretchable cloth material The extensible cloth material is laminated and fused, and the first and second outer layers are constituted by the pair of extensible cloth materials, and an intermediate layer of an elastic resin including a heat insulator is laminated between the two outer layers. The manufacturing method of the heat insulation sheet | seat characterized by having a 2nd process made into a layer structure.   A first step in which a non-woven fabric containing a heat-fusible material is coated with an elastic resin solution containing a heat insulating material, dried, and impregnated; and an extensible fabric material on one surface of the impregnated nonwoven fabric and an extensibility on the other surface And the other non-woven fabric containing the heat-fusible material is laminated and fused, and the stretchable cloth material forms the first outer layer, and the other non-woven fabric forms the second outer layer, and between these two outer layers. A method for producing a heat insulating sheet, comprising a second step of laminating an intermediate layer of a nonwoven fabric impregnated in to form a three-layer structure.   A first step in which an elastic resin liquid containing a heat insulating material is applied to a nonwoven fabric containing a heat-fusible material, dried, and impregnated; and a heat-fusible material having extensibility on both surfaces of the impregnated nonwoven fabric. The first and second outer layers are composed of these other nonwoven fabrics, and the intermediate layer of the nonwoven fabric impregnated between these two outer layers is laminated to form a three-layer structure. A process for producing a heat-insulating sheet.   The liquid of an elastic resin containing a heat insulator is applied to the first outer layer and dried, and the layer on the elastic resin layer side of the first outer layer is overlaid on the impregnated nonwoven fabric during lamination. The manufacturing method of the heat insulation sheet of 6 or 7.   A covering material, wherein the heat insulating sheet according to any one of claims 1 to 4 is molded in accordance with a shape to be covered.   10. The covering material according to claim 9, wherein the heat insulating sheet is formed into a half-box-shaped or half-cylindrical covering material piece having a curved surface, and the covering material is configured by combining these covering pieces.   11. The covering material according to claim 10, wherein a paper mold formed according to the shape of at least a part of the surface is adhered to the surface of the formed half-shaped covering material piece.   The halved covering material piece is formed with a bonding surface that is covered with the other halved covering material pieces and bonded together, and an adhesive portion is formed on the bonding surface. Item 12. The covering material according to Item 10 or 11.   The heat insulating sheet manufactured by the method according to any one of claims 5 to 8 is pressed at room temperature or heated according to the shape of the object to be coated, and the pressed semi-finished product is punched. A method for producing a coating material, comprising molding.   A heat insulating sheet is inserted into a mold formed into a half box shape or half cylinder shape having a curved molding surface, and pressed to form a half-shaped covering material piece, and these covering pieces are combined. 14. The method for manufacturing a coating material according to claim 13, wherein the coating material is configured.   The method for manufacturing a coating material according to claim 13 or 14, wherein the heat insulating sheet is heated before or during pressing.   After heat-insulating sheet is heated to room temperature or 80 degrees Celsius or higher, it is inserted into a mold formed into a half box shape or half cylinder shape with a curved molding surface and pressed at a temperature above room temperature. The manufacturing method of the coating | covering material of Claim 15 characterized by the above-mentioned.   A first step of holding the covering material according to any one of claims 9 to 12 attached to a construction object, and waterproofing and moisture-proofing on an outer surface of the covering material held attached to the construction object A second step of covering the heat-shrinkable holding material having the property and a third step of attaching the coating material to the construction object by blowing hot air onto the heat-shrinkable holding material covered by the covering material to shrink the holding material. A method for constructing a covering material, comprising: