US4575437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing optical fiber for optical transmission
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1985-01-14
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Granted: 1986-03-11
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Expires: 2005-01-14
Abstract
Abstract A process for producing an optical fiber is disclosed. The process comprises forming a primary coating layer on a glass fiber, forming a secondary coating layer comprising a polyamide resin or polyester elastomer composition containing a polyfunctional monomer as a crosslinking agent, and crosslinking the secondary coating layer by irradiation with electron rays having a maximum transmittance thickness smaller than the total thickness of the primary and secondary coating layers. The resulting optical fiber has excellent heat resistance without causing optical transmission loss.
Inventors
- 👤 Keiichi Kojima
- 👤 Keiji Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:51
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00663; C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/1065; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4402; B29C; B29C48/00; B29C48/03; B29C48/05
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A process for producing an optical fiber for optical transmission, which comprises forming a primary coating layer on a glass fiber, forming a secondary coating layer comprising a polyamide resin composition or polyester elastomer composition containing a polyfunctional monomer on the primary coating layer, and crosslinking the secondary coating layer by irradiation with electron rays having a maximum transmittance thickness smaller than the total thickness of the primary coating layer and the secondary coating layer.
Claim 2
Dependent Claim
75 words
A process for producing an optical fiber for optical transmission, which comprises forming a primary coating layer on a glass fiber, forming a secondary coating layer comprising a polyamide resin composition or polyester elastomer composition containing a polyfunctional monomer on the primary coating layer, and crosslinking the secondary coating layer by irradiation with electron rays having a maximum transmittance thickness smaller than the total thickness of the primary coating layer and the secondary coating layer.
Claim 3
Dependent Claim
25 words
A process as claimed in claim 1, wherein the polyamide resin is a polymer comprising a repeating unit containing from 4 to 23 carbon atoms.
Claim 4
Dependent Claim
14 words
A process as claimed in claim 1, wherein the polyamide resin is nylon 12.
Claim 5
Dependent Claim
20 words
A process as claimed in claim 1, wherein the polyester elastomer has a Shore hardness of from 25D to 75D.
Claim 6
Dependent Claim
27 words
A process as claimed in claim 1, wherein the polyfunctional monomer is selected from the group consisting of triallyl cyanurate, triallyl isocyanurate, trimethylolpropane trimethacrylate and trimethylolpropane triacrylate.
Claim 7
Dependent Claim
19 words
A process as claimed in claim 5, wherein the polyfunctional monomer is triallyl cyanurate, triallyl isocyanurate or trimethylolpropane trimethacrylate.
Claim 8
Dependent Claim
37 words
A process as claimed in claim 1, wherein the polyfunctional monomer is present in an amount of from 0.1 to 30 parts by weight per 100 parts by weight of the polyamide resin or the polyester elastomer.
Claim 9
Dependent Claim
37 words
A process as claimed in claim 7, wherein the polyfunctional monomer is present in an amount of from 0.5 to 15 parts by weight per 100 parts by weight of the polyamide resin or the polyester elastomer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |