Laminate of a substrate and an extruded high density polyethylene
AssigneeThe Standard Products Company
InventorsElaine Audrey Mertzel, James Patrick Sheets, John Walter Truskowski
Life of this patent
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Abstract
A laminate of an elastomeric substrate and a high density polyethylene having certain properties is disclosed. The preferred high density polyethylene has a density of from 0.940 to 1.000 g/cm3, a melt index of less than 10 grams per 10 minutes under conditions of 190° C. and 2.160 kg load and 298.2 kPa, and a melt index of greater than 5 grams per 10 minutes under conditions of 190° C. and 21.6 kg load and 2,982.2 kPa pressure. The laminate is particularly well suited for use in automotive seals.
Claims26
A laminate assembly adapted for use as a weatherstrip seal, said laminate assembly comprising:
- an elastomeric substrate;
- and
- a thin layer disposed on and affixed to at least a portion of said substrate, said layer having a thickness less than 500 microns and comprising polyethylene that exhibits a melt index of less than 10 grams per 10 minutes under conditions of 190 degrees centigrade and 2.160 kg total load and 298.2 kPa pressure, and a density of from about 0.940 to about 1.000 g/cm3.
A laminate assembly adapted for use as a weatherstrip seal, said laminate assembly comprising:
- an elastomeric substrate;
- and
- a thin layer disposed on and affixed to at least a portion of said substrate, said layer having a thickness less than 500 microns and comprising polyethylene that exhibits a melt index of greater than 5 grams per 10 minutes under conditions of 190 degrees centigrade and 21.6 kg total load and 2982.2 kPa pressure, and a density of from about 0.940 to about 1.000 g/cm3.
A laminate product comprising (i) a substrate selected from the group consisting of natural rubber, synthetic rubber, thermoplastic polyolefins and thermoplastic vulcanizates and (ii) a high density polyethylene polymer layer disposed on said substrate, said polyethylene having a melt index of less than 10 grams per 10 minutes as determined by ASTM D-1238 under conditions of 190 degrees centigrade and 2.160 kg total load and 298.2 kPa pressure and a melt index of greater than 5 grams per 10 minutes under conditions of 190 degrees centigrade and 21.6 kg total load and 2982.2 kPa pressure.
A glass run channel comprising a substrate and a high density polyethylene layer disposed on said substrate, said substrate selected from the group consisting of natural rubber, synthetic rubber, thermoplastic polyolefin and thermoplastic vulcanizates, and said polyethylene having a melt index of less than 10 grams per 10 minutes as determined by ASTM D-1238 under conditions of 190 degrees centigrade and 2.160 kg total load and 298.2 kPa pressure and a melt index of greater than 5 grams per 10 minutes under conditions of 190 degrees centigrade and 21.6 kg total load and 2982.2 kPa pressure.
A belt weatherstrip comprising (i) a substrate selected from the group consisting of natural rubber, synthetic rubber, thermoplastic polyolefin and thermoplastic vulcanizate, and (ii) a high density polyethylene layer disposed on at least a portion of said substrate, said polyethylene having a melt index of less than 10 g per 10 minutes as determined by ASTM D-1238 under conditions of 190 degrees centigrade and 2.160 kg total load and 298.2 kPa pressure and a melt index of greater than 5 grams per 10 minutes under conditions of 190 degrees centigrade and 21.6 kg total load and 2982.2 kPa pressure.
A method of making an extruded laminate comprising:
- coextruding (i) a substrate selected from the group consisting of synthetic rubber, natural rubber, thermoplastic polyolefin and thermoplastic vulcanizate, and (ii) a high density polyethylene polymer having a melt index of less than 10 grams per 10 minutes as determined by ASTM D-1238 under conditions of 190 degrees centigrade and 2.160 kg total load and 298.2 kPa pressure and a melt index of greater than 5 grams per 10 minutes under conditions of 190 degrees centigrade and 21.60 kg total load and 2982.2 kPa pressure.
Dependencies are inferred from the claim text.