EP0145378A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for producing optical fiber for optical transmission
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1984-11-22
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Granted: —
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Expires: 2004-11-22
Abstract
Abstract @ A process for producing an optical fiber comprising 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, optionally, a lead compound as a radiation-shielding material 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 and secondary coating layers is disclosed. The resulting optical fiber has excellent heat resistant without causing optical transmission loss.
Inventors
- 👤 Shoji C/O Osaka Works Of Sumitomo Nagasaki
- 👤 Keiichi C/O Osaka Works Of Sumitomo Kojima
- 👤 Keiji C/O Osaka Works Of Sumitomo Ueno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 16:46
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4402; B; B29; B29D; B29D11/00; B29D11/00663; C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/1065; B29C; B29C48/00; B29C48/03; B29C48/06
Claims Analysis
Total Claims: 12
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
79 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 and a lead compound 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 4
Dependent Claim
79 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 and a lead compound 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 5
Dependent Claim
27 words
A process as claimed in Claim 1 or 2, wherein the polyamide resin is a polymer comprising a repeating unit containing from 4 to 23 carbon atoms.
Claim 6
Dependent Claim
16 words
A process as claimed in Claim 1 or 2, wherein the polyamide resin is nylon 12.
Claim 7
Dependent Claim
22 words
A process as claimed in Claim 1 or 2, wherein the polyester elastomer has a Shore hardness of from 25D to 75D.
Claim 8
Dependent Claim
29 words
A process as claimed in Claim 1 or 2, wherein the polyfunctional monomer is selected from the group consisting of triallyl cyanurate, triallyl isocyanurate, trimethylolpropane trimethacrylate and trimethylolpropane triacrylate.
Claim 9
Dependent Claim
38 words
A process as claimed in Claim 1 or 2, 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 10
Dependent Claim
54 words
A process as claimed in Claim 2, wherein the lead compound is selected from the group consisting of lead, lead monoxide, lead trioxide, basic lead carbonate, lead stearate, dibasic lead stearate, tribasic lead maleate, dibasic lead phthalate, lead 2-ethylhexylate, lead salicylate, basic lead cinnamate, tribasic lead sulfate, basic lead sulfite and dibasic lead phosphite.
Claim 11
Dependent Claim
39 words
A process as claimed in Claim 2, wherein the lead compound is present in an amount of from about 5 to about 50 parts by weight per 100 parts by weight of the polyamide resin or the polyester elastomer.
Claim 12
Dependent Claim
39 words
A process as claimed in Claim 2 or 9, wherein the lead compound is present in an amount of from 5 to 50 parts by weight per 100 parts by weight of the polyamide resin or the polyester elastomer.
References Cited (Backward Citations)
No citation records indexed.
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