SHEATH MATERIAL OF VACUUM HEAT INSULATION MATERIAL

• Main Authors: SATO TOMOKO, OGAWARA KENJI, SAKAE KENJI
• Format: Patent
• Language: English; Japanese
• Published: 08.01.2015
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide a sheath material of a vacuum heat insulation material capable of simultaneously preventing a pin hole by flexure from occurring and gas barrier from lowering.SOLUTION: A sheath material is configured with a surface protective layer 10, a gas barrier film 20, and a heat-sealable film 30. The heat-sealable film 30 is configured with a film obtained by co-extruding ethylene-vinyl alcohol copolymer 31 and polyethylene 32. By using the heat-sealable film 30, gas barrier can be prevented from lowering even after flexure. 【課題】屈曲によるピンホールの発生とガスバリア性の低下とを共に防止することができる真空断熱材の外装材を提供すること。【解決手段】外装材を、表面保護層１０、ガスバリア性フィルム２０、ヒートシール性フィルム３０によって構成し、かつ、ヒートシール性フィルム３０を、エチレン−ビニルアルコール共重合体３１とポリエチレン３２とを共押出して得られるフィルムによって構成する。このヒートシール性フィルム３０を使用することにより、屈曲後もガスバリア性の低下を防止することができる。【選択図】図１