US4923718A
Expired / Lapsed
US
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Functional film and process for its production
Assignee: Takiron Co Ltd
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Filing: 1987-10-08
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Granted: 1990-05-08
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Expires: 2007-10-08
Abstract
Abstract Functional films comprising a thermoplastic resin having formed thereon a coating layer and a process for their production are disclosed. The films have improved properties including improved heat resistance, are inexpensive, and are for general-purpose. They are produced by baking a thin film of a phenol resin, an epoxy resin, a silicone resin, etc., onto a thermoplastic resin substrate and can be utilized for flexible printed circuit base, insulating tapes, etc.
Inventors
- 👤 Kosuke Iida
- 👤 Hiroshi Yamato
- 👤 Yoji Kadono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:27
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/036; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/05; H05K1/0393; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0129; H05K2201/0137; H05K2201/015; H05K2201/0154; H05K2201/0162; H05K2203/00; H05K2203/07; H05K2203/0756; H05K2203/0759; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31507; Y10T428/31511; Y10T428/3154; Y10T428/31544; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31721; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31935; Y10T428/31942
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
A process for producing a functional film, which comprises a step of forming a thin film of a solution of one, two or more resins selected from among phenol resin, epoxy resin, melamine resin, silicone resin, fluorine resin, polyimide resin, polyamidoimide resin, polyparabanic acid resin, and polyhydantoin resin on one or both sides of a base substrate composed of a flexible thermoplastic resin, and a step of baking said thin film at 130° to 300° C. for 0.5 to 5 minutes with keeping it in a flatly form-retained state without looseness using a clipping mechanism to form a coating layer.
Claim 2
Dependent Claim
100 words
A process for producing a functional film, which comprises a step of forming a thin film of a solution of one, two or more resins selected from among phenol resin, epoxy resin, melamine resin, silicone resin, fluorine resin, polyimide resin, polyamidoimide resin, polyparabanic acid resin, and polyhydantoin resin on one or both sides of a base substrate composed of a flexible thermoplastic resin, and a step of baking said thin film at 130° to 300° C. for 0.5 to 5 minutes with keeping it in a flatly form-retained state without looseness using a clipping mechanism to form a coating layer.
Claim 3
Dependent Claim
55 words
The process as claimed in claim 1, wherein a base substrate composed of one of polyvinyl chloride resin, polycarbonate resin, polyarylate resin, polyethylene terephthalate resin, polyphenylene sulfide resin, polysulfone resin, polyether sulfone resin, and polyether imide resin is used, and a phenol resin solution is used as the resin solution for forming the thin film.
Claim 4
Dependent Claim
29 words
The process as claimed in claim 2, wherein said base substrate has a thickness of 1 to 1,000μ, and said coating layer has a thickness of 1 to 10μ.
Claim 5
Dependent Claim
107 words
The process as claimed in claim 1, wherein a base substrate composed of one of polyethylene terephthalate resin, polyphenylene sulfide resin, polysulfone resin, polyether sulfone resin, and polyether imide resin is used as said base substrate, a solution of one, two or more resins selected from among polyimide resin, polyamidoimide resin, polyparabanic acid resin, and polyhydantoin resin or a solution of a mixture of said resin and one, two or more resins selected from among phenol resin, epoxy resin, and melamine resin is used as said resin solution for forming the thin film, and baking of the formed thin film is conducted at 200° to 300° C.
Claim 6
Dependent Claim
29 words
The process as claimed in claim 4, wherein said base substrate has a thickness of 1 to 350μ, and said coating layer has a thickness of 1 to 10μ.
Claim 7
Dependent Claim
80 words
The process as claimed in claim 1, wherein a base substrate composed of one of polyethylene terephthalate resin, polyphenylene sulfide resin, polysulfone resin, polyether sulfone resin, polyetherimide resin, polyvinyl chloride resin, polycarbonate resin, polyarylate resin, triacetate resin, and methyl methacrylate resin is used as said base substrate, a solution of silicone resin or fluorine resin is used as a resin solution for forming the thin film, and baking of the formed thin film is conducted at 150° to 300° C.
Claim 8
Dependent Claim
29 words
The process as claimed in claim 6, wherein said base substrate has a thickness of 1 to 350μ, and said coating layer formed has thickness of 1 to 10μ.
Claim 9
Dependent Claim
58 words
The process as claimed in claim 6, wherein a base substrate composed of one of polyvinyl chloride resin, polycarbonate resin, polyarylate resin, triacetate resin, and methyl methacrylate resin is used as said base substrate, and an aqueous solution or alcohol solution of silicone resin or fluorine resin is used as said resin solution for forming said thin film.
Claim 10
Dependent Claim
67 words
The process as claimed in claim 1, wherein a base substrate composed of a triacetate resin or a methyl methacrylate resin is used as said base substrate, a solution of one, two or more resins selected from among phenol resin, epoxy resin, and melamine resin is used as said thin film-forming resin solution, and baking of the formed thin film is conducted at 150° to 300° C.
Claim 11
Dependent Claim
30 words
The process as claimed in claim 9, wherein said base substrate has a thickness of 1 to 350μ, and said coating layer formed has a thickness of 1 to 10μ.
References Cited (Backward Citations)
JPS5054670A
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JPS50146686A
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CA1070575A
Cited
JPS5898334A
Cited
JPS58136941A
Cited
JPS59219335A
Cited
JPS6024552A
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JPS61108639A
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JPS6194948A
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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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |