US3694537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of webs having selected oriented portions
Assignee: FMC Corp
•
Filing: 1970-09-18
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Granted: 1972-09-26
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Expires: 1990-09-18
Abstract
Abstract Manufacture of a thermoplastic polymeric web or film having a predetermined pattern of molecularly oriented portions by completely cooling an extruded flat unbroken steam of molten orientable crystallizable, thermoplastic polymeric material to provide an integral web, with selected spaced areas of such stream being cooled more slowly than the regions adjacent thereto, and thereafter stretching the web along biaxial directions.
Inventors
- 👤 Theodore H Fairbanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:33
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; B29C55/14; B29C55/143; B29C53/00; B29C53/22; B29C53/24; B29C35/00; B29C35/16; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
165 words
A method of making a web of polymeric material having a predetermined pattern of molecularly oriented portions including the steps of extruding a flat, unbroken molten stream of orientable, crystallizable, thermoplastic polymeric material, completely cooling the extruded stream of molten thermoplastic material to provide an integral web with selected, independent and substantially like areas aligned longitudinally and transversely of the extruded stream and equally spaced from each other in their respective directions, being cooled at a slower rate than the regions adjacent thereto to thereby impart a higher degree of crystallinity to such selected areas, and stretching the web along biaxial directions to cause regions of the web between adjacent transversely aligned selected areas to be uniaxially oriented in a direction transversely of the web, regions of the web between adjacent longitudinally aligned selected areas to be uniaxially oriented in a direction longitudinally of the web, the selected areas themselves to be substantially undrawn and the remaining regions of the web to be biaxially oriented.
Claim 2
Independent Claim
165 words
A method of making a web of polymeric material having a predetermined pattern of molecularly oriented portions including the steps of extruding a flat, unbroken molten stream of orientable, crystallizable, thermoplastic polymeric material, completely cooling the extruded stream of molten thermoplastic material to provide an integral web with selected, independent and substantially like areas aligned longitudinally and transversely of the extruded stream and equally spaced from each other in their respective directions, being cooled at a slower rate than the regions adjacent thereto to thereby impart a higher degree of crystallinity to such selected areas, and stretching the web along biaxial directions to cause regions of the web between adjacent transversely aligned selected areas to be uniaxially oriented in a direction transversely of the web, regions of the web between adjacent longitudinally aligned selected areas to be uniaxially oriented in a direction longitudinally of the web, the selected areas themselves to be substantially undrawn and the remaining regions of the web to be biaxially oriented.
Claim 3
Dependent Claim
37 words
A method as defined in claim 1 wherein the regions of the extruded stream of polymeric material which are adjacent to the selected areas thereof are cooled at a rate as to at least minimize crystallization thereof.
Claim 4
Dependent Claim
36 words
A method as defined in claim 2 wherein the regions of the extruded stream of polymeric material which are adjacent to the selected areas thereof are cooled at a rate as to prevent crystal formation thereon.
Claim 5
Dependent Claim
21 words
A method as defined in claim 1 wherein the web is stretched to produce fibrillation along the biaxially oriented regions thereof.
Claim 6
Dependent Claim
16 words
A method as defined in claim 1 wherein the web is stretched simultaneously along biaxial directions.
References Cited (Backward Citations)
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Cited
US3137746A
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US3255065A
Cited
US3386876A
Cited
US3423274A
Cited
US3500627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |