Stock material or miscellaneous articles – Sheet including cover or casing – Foamed or expanded material encased
Patent
1995-06-07
1996-12-24
McCamish, Marion E.
Stock material or miscellaneous articles
Sheet including cover or casing
Foamed or expanded material encased
4283055, 4283186, 521 50, 521 99, 521110, 521128, 521134, 521136, 521142, 521146, 521155, 522 6, 523400, B32B 314
Patent
active
055872204
ABSTRACT:
A foamed plastic manufactured by foaming a mixture of a resin and a volatile polymerizable foaming agent, wherein the pressure in the foams of the foamed plastic is less than atmospheric pressure, is disclosed. Further, a foamed plastic manufactured by hermetically sealing with an airtight film and foaming a mixture of a resin and a volatile polymerizable foaming agent, wherein the pressure in a gap region between the airtight film and the foamed plastic and the pressure in the foams of the foamed plastic are less than atmospheric pressure is disclosed. Further, a method of manufacturing foamed plastic comprising foaming a mixture of a volatile polymerizable foaming agent and a resin, and irradiating the foamed plastic with an energy beam. According to the invention, to enhance the heat insulation and soundproof performance a volatile liquid polymerizable monomer is used as foaming agent, and irradiated with an energy beam to polymerize the foaming agent after forming, and to maintained a reduced internal pressure, the foamed plastic is further covered by a metal film or laminated film.
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Database WPIL (Derwent), accession No. 83-15929K(07), Derwent Publications Ltd., London, GB & JP-A-58 011 714 (Shinetsu Chem. Ind. K.K.) Jul. 1, 1983.
CA--99: 158,922, Dec. 1983.
Copenheaver Blaine R.
Matsushita Electric - Industrial Co., Ltd.
McCamish Marion E.
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