US4966807A
Expired / Lapsed
US
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Multiaxially oriented thermotropic polymer films and method of preparation
Assignee: Vencore Services and Solutions Inc
•
Filing: 1988-06-13
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Granted: 1990-10-30
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Expires: 2008-06-13
Abstract
Abstract This invention relates in general to the formation of multiaxially (e.g., biaxially) oriented films from high molecular weight liquid crystalline thermotropic polymers (homopolymers, copolymers, and the like), wherein due to the processing conditions employed, the films have a controlled molecular orientation. The novel multiaxially oriented films of the present invention are preferably prepared from two commercially available thermotropic polymers, Datrco Manufacturing, Incorporated's XYDAR TM LCP and Hoechst Celanese's VECTRA TM LCP.
Inventors
- 👤 Andrew C. Harvey
- 👤 Richard W. Lusignea
- 👤 James L. Racich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/25; B29C48/30; B29C48/32; B29C48/33; B29C67/00; B29C67/24; B32B15/00; B32B15/04; B32B15/08; B32B15/09; B32B27/36; C; C08; C08J; C08J5/00; C08J5/18; B29C48/07; B29C48/08; B29K; B29K2105/00; B29K2105/0079; B29K2995/00; B29K2995/0037; B29K2995/005; B29K2995/0053; B29L; B29L2009/00; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2367/00; C08J2367/00; C08J2367/02; C08J2367/03; C08J2377/00; C08J2377/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/31; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
34 words
A film having a controllable coefficient of thermal expansion and a thickness of at least about 0.010 mm, prepared from a molecularly ordered thermotopic liquid crystalline polymer, said film having a multiaxial molecular orientation.
Claim 2
Dependent Claim
34 words
A film having a controllable coefficient of thermal expansion and a thickness of at least about 0.010 mm, prepared from a molecularly ordered thermotopic liquid crystalline polymer, said film having a multiaxial molecular orientation.
Claim 3
Dependent Claim
14 words
The film of claim 1, wherein the thickness is at least about 0.10 mm.
Claim 4
Dependent Claim
14 words
The film of claim 2, wherein the multiaxial molecular orientation is nearly balanced biaxial.
Claim 5
Dependent Claim
24 words
The film of claim 1, 2, or 3, wherein the liquid crystalline polymer is selected from the group of Xydar® LCP and Vectra® LCP.
Claim 6
Dependent Claim
34 words
A film having a controllable coefficient of thermal expansion and a thickness of less than about 0.10 mm, prepared from a molecular ordered thermotropic liquid crystalline polymer, said film having a multiaxial molecular orientation.
Claim 7
Dependent Claim
34 words
A film having a controllable coefficient of thermal expansion and a thickness of less than about 0.10 mm, prepared from a molecular ordered thermotropic liquid crystalline polymer, said film having a multiaxial molecular orientation.
Claim 8
Dependent Claim
14 words
The film of claim 4, wherein the multiaxial molecular orientation is nearly balanced biaxial.
Claim 9
Dependent Claim
23 words
The film of claim 5 or 6, wherein the liquid crystalline polymer is selected from the group of Xydar® LCP and Vectra® LCP.
Claim 10
Independent Claim
51 words
A method of preparing a multiaxially oriented film from a thermotropic liquid crystalline polymer film comprising the steps of: (a) subjecting a polymer melt of said polymer to at least two cross-directional strain forces; and (b) solidifying the microscale structural orientation formed in step (a) by physical, chemical or thermal means.
Claim 11
Independent Claim
51 words
A method of preparing a multiaxially oriented film from a thermotropic liquid crystalline polymer film comprising the steps of: (a) subjecting a polymer melt of said polymer to at least two cross-directional strain forces; and (b) solidifying the microscale structural orientation formed in step (a) by physical, chemical or thermal means.
Claim 12
Dependent Claim
13 words
The method of claim 8, wherein the multiaxial orientation is nearly balanced biaxial.
Claim 13
Dependent Claim
15 words
The method of claim 8 or 9, wherein the thermotropic polymer has the formula: ##STR2##
Claim 14
Dependent Claim
15 words
The method of claim 8 or 9, wherein the thermotropic polymer has the formula: ##STR3##
Claim 15
Dependent Claim
20 words
A laminated composite film comprising at least two multiaxially oriented films prepared from a molecularly oriented thermotropic liquid crystalline polymer.
Claim 16
Dependent Claim
20 words
A laminated composite film comprising at least two multiaxially oriented films prepared from a molecularly oriented thermotropic liquid crystalline polymer.
Claim 17
Dependent Claim
27 words
The laminated composite film of claim 12, wherein the thermotropic liquid crystalline polymer is selected from the group consisting of Xydar® LCP, ectra® LCP, and mixtures thereof.
Claim 18
Dependent Claim
19 words
The laminated composite film of claim 12 or 13, which further comprises a layer of copper thereon or therebetween.
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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) | 1993-10-29 | 1994-04-30 | 1994-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-29 | 1998-04-30 | 1998-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-29 | 2002-04-30 | 2002-10-30 | $7700.00 | Window Closed / Lapsed |