Laminate of a substrate and an extruded high density polyethylene

• US 6,660,360 B2
• Filed: 12/13/2000
• Issued: 12/09/2003
• Est. Priority Date: 01/04/2000
• Status: Expired due to Fees

• Current Assignee: Cooper-Standard Automotive Incorporated (Cooper-Standard Holdings Incorporated)
• Original Assignee: Cooper Technologies
• Inventors: Sheets, James Patrick, Mertzel, Elaine Audrey, Truskowski, John Walter
• Primary Examiner(s): Jones, Deborah
• Assistant Examiner(s): RHEE, JANE J
• Application Number:
  US09/735,947
• Publication Number:
  US 20010055663A1
• Time in Patent Office: 1,091 Days
• Field of Search: 428/35, 428/521, 428/494, 428/122, 428/219, 428/216, 428/492, 428/515, 428/523, 264/171, 494/901, 494/751
• US Class Current: 428/122
• CPC Class Codes: B32B 2038/0076 Curing, vulcanising, cross-linking
• CPC Class Codes: B32B 2305/74 Partially cured
• CPC Class Codes: B32B 2307/554 Wear resistance
• CPC Class Codes: B32B 2317/22 Natural rubber synthetic rubber B32B2319/00
• CPC Class Codes: B32B 2319/00 Synthetic rubber natural rubber B32B2317/22
• CPC Class Codes: B32B 2323/043 HDPE, i.e. high density polyethylene
• CPC Class Codes: B32B 25/08 of synthetic resin
• CPC Class Codes: B32B 2581/00 Seals; Sealing equipment; Gaskets
• CPC Class Codes: B32B 2605/08 Cars
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 37/153 at least one layer is extruded and immediately laminated while in semi-molten state
• CPC Class Codes: B60J 10/15 characterised by the material
• CPC Class Codes: B60J 10/74 for sliding window panes, e.g. sash guides
• CPC Class Codes: B60J 10/75 for sealing the lower part of the panes
• CPC Class Codes: Y10T 428/24198 Channel-shaped edge component [e.g., binding, etc.]
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/31826 Of natural rubber
• CPC Class Codes: Y10T 428/31909 Next to second addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer
• CPC Class Codes: Y10T 428/31938 Polymer of monoethylenically unsaturated hydrocarbon

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.

Claims

1. 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.

2. The glass run channel of claim 1 wherein said substrate defines a channel region and said layer of polyethylene is disposed in said channel.

3. The glass run channel of claim 1 wherein said polyethylene has a density of from about 0.900 to about 1.250 g/cm³.

4. The glass run channel of claim 1 wherein said polyethylene has a density of from about 0.940 to about 1.000 g/cm³.

5. The glass run channel of claim 1 wherein said layer of polyethylene has a thickness less than 500 microns.

6. The glass run channel of claim 5 wherein said layer of polyethylene has a thickness of from about 300 microns to about 1 micron.

7. The glass run channel of claim 6 wherein said layer of polyethylene has a thickness of from about 200 microns to about 5 microns.

13. The glass run channel of claim 1, wherein said high density polyethylene layer includes at least one of a coloring agent, a pigment, and an additive to provide an aesthetic appearance to said glass run channel.

8. 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.

9. The belt weatherstrip of claim 8 wherein said polyethylene has a density of from about 0.900 to about 1.250 g/cm³.

10. The belt weatherstrip of claim 8 wherein said polyethylene has a density of from about 0.940 to about 1.000 g/cm³.

11. The belt weatherstrip of claim 8 wherein said layer of polyethylene has a thickness less than 500 microns.

12. The belt weatherstrip of claim 11 wherein said layer of polyethylene has a thickness of from about 300 microns to about 1 micron.