A plurality of thin-wall parts (9a) of a sealant layer (7) are formed in a portion continuously changed in the interval of one sealing part (8) and a gas barrier layer (6) of other laminate film (4). At the inner circumferential side between the adjacent thin-wall parts (9a) and the thin-wall part (
A plurality of thin-wall parts (9a) of a sealant layer (7) are formed in a portion continuously changed in the interval of one sealing part (8) and a gas barrier layer (6) of other laminate film (4). At the inner circumferential side between the adjacent thin-wall parts (9a) and the thin-wall part (9a) at the innermost circumferential side and at the outer circumferential side of the thin-wall part (9a) of the outermost circumferential side, a thick-wall part (9b) of the sealant layer (7) is formed. All of the opposing sealant layers (7) between the two adjacent thin-wall parts (9a) are mutually heated and fused, so that an excellent adiabatic performance is maintained for a long period.
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1. A vacuum insulation material comprising: first and second laminate films each having a protective layer on a first side, a sealant layer on a second side, and a gas barrier layer between the protective layer and the sealant layer;a core material sealed under a reduced pressure between the first a
1. A vacuum insulation material comprising: first and second laminate films each having a protective layer on a first side, a sealant layer on a second side, and a gas barrier layer between the protective layer and the sealant layer;a core material sealed under a reduced pressure between the first and second laminate films disposed so that the sealant layers of the laminate films are opposite to each other; anda sealing part having the sealant layers of the first and second laminate films fused to each other near the peripheral edge of the laminate films so as to surround a whole circumference of the core material,wherein at least at the sealing part positioned at one side of the laminate film or at the sealing part positioned at one side of the core material out of the sealing parts surrounding the core material, the sealing part is changed continuously, when seen from a section in a plane perpendicular to the laminate films, in a direction from an outermost peripheral edge to an inner periphery of the laminate films, in a portion that changes in the interval between the gas barrier layers of the first and second laminate films, there are a plurality of thin-wall parts in which a thickness of the sealant layer between the gas barrier layers is smaller than a total thickness of the thickness of the sealant layers between the gas barrier layers of the laminate films not heated and fused,between the two adjacent thin-wall parts out of the plurality of the thin-wall parts, at the inner circumferential side of the thin-wall part positioned at the inner most circumferential side out of the plurality of thin-wall parts and at the outermost circumferential side of the thin-wall part out of the plurality of the thin-wall parts positioned at the outermost circumferential side, there are a plurality of thick-wall parts in which the thickness of the sealant layer between the gas barrier layers of the first and second laminate films is greater than the total thickness of the sealant layers between the gas barrier layers of the laminate films not heated and fused,the first and second laminate films have a convexo-concave shape on surfaces thereof,wherein a convexo-concave shape of the surface of the first laminate film is different from a convexo-concave shape of the surface of the second laminate film,the sealing part comprises the thin-wall part and the thick-wall part, and of the plurality of thin-wall parts, all sealant layers opposite to each other between two adjacent thin-wall parts are heated and fused, where the thin-wall part is provided at a deepest position of a concave part at a boundary of the sealant layer and the gas barrier layer in the sealing part. 2. The vacuum insulation material according to claim 1, wherein in the thin-walled part, in the vicinity of a thinnest portion of the sealant layer, the a decremental thickness of the sealant layer becomes less as the thickness of the sealant layer approaches the thinnest portion. 3. The vacuum insulation material according to claim 2, wherein when seen from a section being cut off from a plane perpendicular to the closest peripheral edge, in the thin-wall part, a surface of one of the laminate films is concaved in an arc extending to the side of the sealant layer in the portion corresponding to the thinnest portion of the thin-wall part. 4. The vacuum insulation material according to claim 1, wherein the thin-wall part is concaved to a side of the sealant layer in the portion corresponding to a thinnest portion of the thin-wall part on the surface of the first laminate film, and is not concaved to a side of the sealant layer in the portion corresponding to the thinnest portion of the thin-wall part on the surface of the second laminate film. 5. The vacuum insulation material according to claim 1, wherein a metal foil is included in the gas barrier layer of the laminate film in either one of the first and second laminate films that is smaller in a bulging height of the surface convexo-concave shape. 6. The vacuum insulation material according to claim 1, wherein a metal evaporation layer is included in the gas barrier layer of the laminate film in either one of the first and second laminate films that is larger in a bulging height of a surface convexo-concave shape. 7. The vacuum insulation material according to claim 1, wherein a metal foil is included in the gas barrier layer of at least one laminate film out of the first and second laminate films. 8. The vacuum insulation material according to claim 1, wherein a metal evaporation layer is included in the gas barrier layer of at least one laminate film out of the first and second laminate films. 9. The vacuum insulation material according to claim 1, wherein a metal foil is included in the gas barrier layer of at least one laminate film out of the first and second laminate films, and a metal evaporation layer is used in the gas barrier layer of the other laminate film. 10. The vacuum insulation material according to claim 1, wherein the thin-wall part and the thick-wall part are provided in the sealing part on remaining sides except for one side of the laminate films of the sealing part surrounding the core material. 11. The vacuum insulation material according to claim 1, wherein the thin-wall part and the thick-wall part are provided in a remaining sealing part except for a sealing part positioned in one direction of the core material of the sealing part surrounding the core material. 12. The vacuum insulation material according to claim 1, wherein the sealing part having the thin-wall part and the thick-wall part surrounds the whole circumference of the core material. 13. The vacuum insulation material according to claim 12, wherein the whole circumference of the core material is surrounded by a linked thin-wall part. 14. The vacuum insulation material according to claim 1, wherein the laminate films comprise square-shaped films, and the sealing part having the thin-wall part and the thick-wall part is provided near the peripheral edge of three sides of the laminate films, and is surrounded by the thin-wall part linked on three sides of the core material. 15. The vacuum insulation material according to claim 14, wherein the thin-wall part is linked from one side to other side of two sides adjacent to the side close to the sealing part having the thin-wall part and the thick-wall part. 16. The vacuum insulation material according to claim 1, wherein the laminate films comprise polygonal-shaped films having three or more angles, and the thin-wall part is linked between two sides adjacent to a side close to the sealing part having the thin-wall part and the thick-wall part. 17. The vacuum insulation material of claim 1, wherein a deepest part of the sealant layer at a side of a boundary between the sealant layer and the gas barrier layer of the first laminate film is not opposite to a deepest part in the concave portion at a side of a boundary between the sealant layer and the gas barrier layer of the second laminate film of the sealant layer.
Takagaki Tadao (Tokyo JPX) Hirose Shizuo (Tokyo JPX) Tonouchi Ikuo (Tokyo JPX), Self-supporting bag, a method of production thereof and an apparatus for production thereof.
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