US4120931A
Expired / Lapsed
US
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Method of manufacturing oriented amorphous aromatic polymeric films
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1977-05-26
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Granted: 1978-10-17
•
Expires: 1997-05-26
Abstract
Abstract A method for producing a high-strength film of amorphous aromatic high polymers comprising rolling said polymer between rolls, and stretching the rolled film of said polymer.
Inventors
- 👤 Nobuo Fukushima
- 👤 Yukikazu Uemura
- 👤 Takuzo Okumura
- 👤 Haruo Hayashida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:18
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/18
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
93 words
A method for producing a high-strength film of an amorphous aromatic high polymer which comprises passing a raw film comprising said high polymer, which contains more than 80% of an amorphous resin having aromatic nuclei in the main chains thereof, a crystallinity of less than 30% and a secondary transition point of higher than 150° C., through at least one pair of compression rolls maintained between the temperatures of 100° C. lower than and 50° C. higher than the secondary transition point of said amorphous resin, thereby rolling and orienting said raw film.
Claim 2
Independent Claim
93 words
A method for producing a high-strength film of an amorphous aromatic high polymer which comprises passing a raw film comprising said high polymer, which contains more than 80% of an amorphous resin having aromatic nuclei in the main chains thereof, a crystallinity of less than 30% and a secondary transition point of higher than 150° C., through at least one pair of compression rolls maintained between the temperatures of 100° C. lower than and 50° C. higher than the secondary transition point of said amorphous resin, thereby rolling and orienting said raw film.
Claim 3
Dependent Claim
40 words
A method according to claim 1 wherein said high polymer consists of an amorphous resin alone, having aromatic nuclei in the main chains thereof, a crystallinity of less than 30% and a secondary transition point of higher than 150° C.
Claim 4
Dependent Claim
16 words
A method according to claim 2 wherein said high polymer is a polyarylene polyether polysulfone resin.
Claim 5
Dependent Claim
14 words
A method according to claim 2 wherein said high polymer is a polyarylate resin.
Claim 6
Dependent Claim
14 words
A method according to claim 2 wherein said high polymer is a polyimide resin.
Claim 7
Dependent Claim
14 words
A method according to claim 2 wherein said high polymer is a polyamideimide resin.
Claim 8
Dependent Claim
15 words
A method according to claim 2 wherein said high polymer is a polyphenylene oxide resin.
Claim 9
Dependent Claim
14 words
A method according to claim 2 wherein said high polymer is a polyhydantoin resin.
Claim 10
Dependent Claim
14 words
A method according to claim 2 wherein said high polymer is a polyoxadiazole resin.
Claim 11
Dependent Claim
15 words
A method according to claim 2 wherein said high polymer is a polyparabanic acid resin.
Claim 12
Dependent Claim
14 words
A method according to claim 2 wherein said high polymer is a polyoxazine-dione resin.
Claim 13
Dependent Claim
38 words
A method according to claim 1 wherein said raw film consists of said high polymer or a mixture of said high polymer with at least one member selected from the group consisting of a resin and a filler.
Claim 14
Dependent Claim
41 words
A method according to claim 1 wherein a lubricating liquid which lowers the frictional coefficient between the compression rolls and the raw film to less than 0.2 is added to the contact point between the compression rolls and the raw film.
Claim 15
Dependent Claim
14 words
A method according to claim 13 wherein said lubricating liquid is a trihydric alcohol.
Claim 16
Dependent Claim
15 words
A method according to claim 14 wherein said lubricating liquid is a paraffin series oil.
Claim 17
Dependent Claim
15 words
A method according to claim 14 wherein said lubricating liquid is a naphthene series oil.
Claim 18
Independent Claim
148 words
A method for producing a high-strength film of an amorphous aromatic high polymer, which comprises passing a raw film comprising said high polymer, which contains more than 80% of an amorphous resin having aromatic nuclei in the main chains thereof, a crystallinity of less than 30% and a secondary transition point of higher than 150° C., through at least one pair of compression rolls maintained between the temperatures of 100° C. lower than and 50° C. higher than the secondary transition point of said amorphous resin, thereby rolling said raw film, and then stretching the rolled film in at least one of the following directions: (1) the same direction as the rolling direction, and (2) a direction normal to the rolling direction, said stretching being carried out between the temperatures of 100° C. lower than and 50° C. higher than the secondary transition point of said amorphous resin.
Claim 19
Independent Claim
148 words
A method for producing a high-strength film of an amorphous aromatic high polymer, which comprises passing a raw film comprising said high polymer, which contains more than 80% of an amorphous resin having aromatic nuclei in the main chains thereof, a crystallinity of less than 30% and a secondary transition point of higher than 150° C., through at least one pair of compression rolls maintained between the temperatures of 100° C. lower than and 50° C. higher than the secondary transition point of said amorphous resin, thereby rolling said raw film, and then stretching the rolled film in at least one of the following directions: (1) the same direction as the rolling direction, and (2) a direction normal to the rolling direction, said stretching being carried out between the temperatures of 100° C. lower than and 50° C. higher than the secondary transition point of said amorphous resin.
Claim 20
Dependent Claim
40 words
A method according to claim 17 wherein said high polymer consists of an amorphous resin alone, having aromatic nuclei in the main chain thereof, a crystallinity of less than 30% and a secondary transition point of higher than 150° C.
Claim 21
Dependent Claim
16 words
A method according to claim 18 wherein said high polymer is a polyarylene polyether polysulfone resin.
Claim 22
Dependent Claim
14 words
A method according to claim 18 wherein said high polymer is a polyarylate resin.
Claim 23
Dependent Claim
14 words
A method according to claim 18 wherein said high polymer is a polyimide resin.
Claim 24
Dependent Claim
14 words
A method according to claim 18 wherein said high polymer is a polyamideimide resin.
Claim 25
Dependent Claim
15 words
A method according to claim 18 wherein said high polymer is a polyphenylene oxide resin.
Claim 26
Dependent Claim
14 words
A method according to claim 18 wherein said high polymer is a polyhydantoin resin.
Claim 27
Dependent Claim
14 words
A method according to claim 18 wherein said high polymer is a polyoxadiazole resin.
Claim 28
Dependent Claim
15 words
A method according to claim 18 wherein said high polymer is a polyparabanic acid resin.
Claim 29
Dependent Claim
14 words
A method according to claim 18 wherein said high polymer is a polyoxazine-dione resin.
Claim 30
Dependent Claim
38 words
A method according to claim 17 wherein said raw film consists of said high polymer or a mixture of said high polymer with at least one member selected from the group consisting of a resin and a filler.
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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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |