Heat-resistant liner-provided vessel closure and process for preparation thereof
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United States of America Patent
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Oct 29, 1991
Issued Date -
N/A
app pub date -
Feb 11, 1991
filing date -
Aug 8, 1988
priority date (Note) -
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Abstract
Disclosed is a vessel closure having a liner formed from a composition comprising (i) a hydrogenated styrene/butadiene block copolymer having a melt index smaller than 0.1 g/10 min as measured at a temperature of 200.degree. C. under a load of 5 kg, (ii) liquid paraffin and (iii) a propylene resin. In this liner, the compression permanent strain and permanent elongation under high temperature conditions are extremely small, and therefore, even if a divergence is produced between the liner and the mouth portion of a vessel by thermal deformation or thermal shrinkage, a good sealing property can be maintained.
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