Seal member
AssigneeSumitomo Riko Company Limited
InventorsTakahiro Morita, Yasuyuki Hayasaki, Ryosuke Yamaoka, Risa Tajima
Life of this patent
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Abstract
This seal member is a cured product of a silicone rubber composition that comprises a silicone rubber and silica particles, and has multiple insertion holes into which counterpart members are inserted; and this seal member satisfies the following conditions (a) to (d). (a) If X (parts by mass) is the content of the silica particles relative to 100 parts by mass of a base polymer of the silicone rubber, (elastic recovery rate (%))/(X (parts by mass)) is from 3.6 to 9.6. (b) The type A durometer hardness is from 15 to 30. (c) The tensile strength at break is 2.1 MPa or more. (d) The coefficient of kinetic friction of the surfaces of the insertion holes is 2.5 or less.
Claims9
A seal member comprising a plurality of insertion holes into which counterpart members are inserted,
- wherein the seal member is a cured product of a silicone rubber composition comprising a silicone rubber and silica particles and satisfies following conditions (a) to (d):
- (a) if X parts by mass is the content of the silica particles relative to 100 parts by mass of a base polymer of the silicone rubber, elastic recovery rate (%)/X (parts by mass)=3.6 to 9.6;
- (b) the type A durometer hardness is 15 or more and 30 or less;
- (c) the tensile strength at break is 2.1 MPa or more;
- and
- (d) the coefficient of kinetic friction of a surface of the insertion hole is 2.5 or less.
Dependencies are inferred from the claim text.