Panasonic Corporation

Tomohisa Tenra

Masamichi Hashida

Takao Fujimoto

Shinya Kojima

Toshio Kobayashi

Kazuo Hashimoto

Fumie Horibata

Vacuum insulator includes core member and jacket which covers core member. Jacket is decompressed its interior and core member includes a glass-fiber laminated unit. The glass fiber is formed of toughened glass-fiber which is low brittle and its fiber strength is toughened. This structure allows improving the heat insulating performance as well as lowering the material cost of vacuum insulator.

Vacuum heat insulator and testing method for the glass fiber laminate to be used in the insulator

A plurality of thin-wall parts () of a sealant layer () are formed in a portion continuously changed in the interval of one sealing part () and a gas barrier layer () of other laminate film (). At the inner circumferential side between the adjacent thin-wall parts () and the thin-wall part () at the innermost circumferential side and at the outer circumferential side of the thin-wall part () of the outermost circumferential side, a thick-wall part () of the sealant layer () is formed. All of the opposing sealant layers () between the two adjacent thin-wall parts () are mutually heated and fused, so that an excellent adiabatic performance is maintained for a long period.

Vacuum heat insulation material and manufacturing method therefor

A vacuum heat insulator small in limitation in shape of applicable objects, and wide in application is presented. A vacuum heat insulator is formed of a plurality of core members of thickness of 5 mm or less made of glass fiber shaped nearly in a regular octagonal shape, being coated with a gas barrier enveloping member and evacuated in side. The core members are shaped in octagon, and disposed in lattice layout at specified intervals so as to form folding lines in four directions of vertical, lateral and oblique 45-degree directions, parallel to each side. In order that the plurality of core members may be located in independent spaces individually, the entire surface of the enveloping member around the core members is formed as heat seal parts, and it is foldable in four directions and is flexible. By cutting the heat seal parts along the core members so as to leave about 3 mm in the periphery, a vacuum heat insulator of any desired shape and wide effective heat insulating area can be obtained. The core members may be formed in desired shape, and complicated shapes and through-holes can be formed, so that vacuum heat insulators applicable in a very wide scope of purposes can be presented.

Manufacturing method for a vaccum heat insulator

Vacuum heat insulator

A vacuum heat insulation material has a covering material which is a lamination body including a sealant layer, a metal foil layer, a first plastic film layer, and a second plastic film layer which are laminated in this order from inside to outside via adhesive layers. When a foreign body is pierced into the vacuum heat insulation material, the propagation of breakage caused by the piercing is blocked somewhere inside the lamination body, thereby preventing the formation of through-pinholes. This results in the provision of a high-quality vacuum heat insulation material with excellent long-term insulation performance by using a covering material excellent in gas barrier properties and pinhole resistance to the piercing of minute foreign bodies.

Vacuum heat insulation material and cold reserving apparatus with the same

A vacuum heat insulator has a core formed of a glass fiber laminated body where glass fibers are laminated in the thickness direction, and an enveloping member that covers the core and has gas barrier property. The inside of the enveloping member is evacuated and the enveloping member is sealed. The core is pressurized and molded and the glass fibers are drawn by heat deformation of the glass fibers at a temperature at which the glass fibers start to slightly deform due to own weight of the glass fibers or a temperature at which the glass fibers become deformable due to a vertical load in pressing and the sectional shapes of the glass fibers do not significantly vary. Additionally, the shape of the core is kept by entanglement of parts of the glass fibers instead of binding of the glass fibers.

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Shiga, Japan

Tomohisa Tenra