| 摘要 |
PROBLEM TO BE SOLVED: To provide a foamed sheet of a rubber-based resin having closed cells, which, even if used as a dust prevention sealing material for example, exhibits such high-performance sealing capability as not causing gaps in the interface between a member to be sealed and the sheet over a long time, and to provide its manufacturing method. SOLUTION: The sealing material is a foamed sheet of a rubber-based resin having closed cells, which contains a rubber-based resin and a fiber. Characteristically, the sealing material has an apparent density of 100-200 kg/m<SP>3</SP>measured according to JIS K7222, a compression set of≤50% measured according to JIS K6262 under the conditions of 80°C and 24 hours and a 50% compression stress of≤200 kPa measured according to JIS K6767. The sealing material keeps the excellent sealing capability over a long period of time while showing low repulsion. COPYRIGHT: (C)2010,JPO&INPIT
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