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US3682730A
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Method for laminating oriented thermoplastic film to thermoplastic foam
Assignee: Mobil Oil AS
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Filing: 1969-11-14
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Granted: 1972-08-08
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Expires: 1989-11-14
Abstract
Abstract A METHOD FOR THE PRODUCTION OF LAMINATES COMPRISING ORIENTED THERMOPLASTIC FILM HEAT BONDED TO A THERMOPLASTIC FOAM WHICH COMPRISES EXTRUSION OF A THERMOPLASTIC FOAM CONTAINING A BLOWING AGENT WHICH HAS A PLASTICIZING ACTION UPON THE FOAM MATEIAL AND WHILE THE EXTRUDED FOAM STILL CONTAINS RESIDUAL BLOWING AGNET, HEAT WELDING AN ORIENTED THERMOPLASTIC FILM TO THE FOAM. DIS- ORIENTATION OF THE ORIENTED FILM IN AACCORD WITH THE PRESENT METHOD IS ELIMINATED BY VITRUE OF THE LOWER HEAT BONDING TEMPERATURES NECESSARY TO ACHIEVE AN EFFECTIVE WELD BY VIRTUE OF THE PRESENCE OF THE BLOWING AGENT-PLASTICIZER MATERIAL REMAINING IN THE FOAM.
Inventors
- 👤 Donald A Haase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:33
CPC Classifications
B; B32; B32B; B32B37/00; B29; B29C; B29C43/00; B29C43/22; B29C43/30; B29C43/305; B29C44/00; B29C44/20; B29C44/32; B29C44/326; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29C63/00; B32B27/00; B32B2305/00; B32B2305/02; B32B2305/022; B32B2307/00; B32B2307/50; B32B2307/514; B32B2325/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984; Y10T428/249987; Y10T428/249988; Y10T428/249991; Y10T428/249992
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |