EP0131067A1
Expired / Lapsed
EP
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Conductive synthetic resin molding material
Assignee: Kyocera Chemical Corp
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Filing: 1983-10-04
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Granted: —
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Expires: 2003-10-04
Abstract
Abstract A conductive synthetic resin composition, which is suited for manufacturing a molded product having an excellent electromagnetic shielding effect, and comprises master pellets consisting of a cylindrical synthetic resin layer (1) and a bundle of a number of strands of fibrous conductive filler (2) filled inside said synthetic resin layer (1) in a longitudinal direction thereof, the master pellets being cut in the form of pellets; and natural pellets consisting of a synthetic resin.
Inventors
- 👤 Toshio Mayama
- 👤 Hidehiro Iwase
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 17:40
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/009; B; B29; B29B; B29B9/00; B29B9/12; B29B9/14; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01B1/24
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
60 words
A conductive synthetic resin molding material comprising: master pellets consisting of a cylindrical synthetic resin layer (1) and a bundle of a number of strands of fibrous conductive filler (2) filled inside said synthetic resin layer (1) in a longitudinal direction thereof, the master pellets being cut in the form of pellets; and natural pellets consisting of a synthetic resin.
Claim 2
Dependent Claim
60 words
A conductive synthetic resin molding material comprising: master pellets consisting of a cylindrical synthetic resin layer (1) and a bundle of a number of strands of fibrous conductive filler (2) filled inside said synthetic resin layer (1) in a longitudinal direction thereof, the master pellets being cut in the form of pellets; and natural pellets consisting of a synthetic resin.
Claim 3
Dependent Claim
18 words
A molding material according to claim 1, characterized in that the conductive filler (2) is a metal fiber.
Claim 4
Dependent Claim
26 words
A molding material according to claim 1, characterized in that the conductive filler (2) is a carbon fiber or carbon fiber coated with a metal layer.
Claim 5
Dependent Claim
23 words
A molding material according to claim 1, characterized in that the conductive filler (2) is a glass fiber coated with a metal layer.
Claim 6
Dependent Claim
20 words
A molding material according to claim 1, . characterized in that the conductive filler (2) is coated with a metal.
Claim 7
Dependent Claim
31 words
A molding material according to claim 1, characterized in that a bundle of the conductive filler (2) has a coating layer (3) of a titanate coupling agent on a surface thereof.
Claim 8
Dependent Claim
46 words
A molding material according to claim 6, characterized in that the coating layer (3) of the titanate coupling agent consists of a member selected. from the group consisting of isopropyltridodecylbenzene sulfonyl titanate, isopropyltris(dioctylpyrophosphate) titanate, bis(dioctylpyrophosphate).oxyacetate titanate, bis(dioctylpyrophosphate) ethylene titanate, isopropyltricumylphenyl titanate, isoprophl(N-aminoethyl-aminoethyl) titanate, and isopropyltri-(dioctylphosphate) titanate.
Claim 9
Dependent Claim
24 words
A molding material according to claim 6, characterized in that the bundle of the conductive filler (2) consists of a plurality of smaller bundles.
Claim 10
Dependent Claim
37 words
A molding material according to claim 1, characterized in that the mixing ratio of the master pellets to the natural pellets is in the range of from 1 : 1 to 1 : 20, based on weight.
Claim 11
Dependent Claim
32 words
A molding material according to claim 1, characterized in that a resin of the cylindrical synthetic resin layer (1) and the synthetic resin of the natural pellets are of the same type.
Claim 12
Dependent Claim
31 words
A molding material according to claim 1, characterized in that a resin of the cylindrical synthetic resin layer (1) and the synthetic resin of the natural pellets produce a polymer blend.
Claim 13
Dependent Claim
14 words
A molding material according to claim 1, wherein the master pellets are shaped flat.
Claim 14
Independent Claim
43 words
A method of continueously forming master pellets, which comprises the steps of continueously passing a bundle of fibrous conductive fillers (2) through an extruder (12) for coating a synthetic resin layer (1) around the bundle and cutting the bundle coated with the resin.
Claim 15
Independent Claim
43 words
A method of continueously forming master pellets, which comprises the steps of continueously passing a bundle of fibrous conductive fillers (2) through an extruder (12) for coating a synthetic resin layer (1) around the bundle and cutting the bundle coated with the resin.
Claim 16
Dependent Claim
26 words
A method according to claim 13, characterized in that said bundle is precoated with a titanate coupling agent (11) before being passed through the extruder (12).
Claim 17
Dependent Claim
44 words
A method according to claim 13, characterized in that a step of pressing the bundle coated with the resin is included after the step of passing the bundle through the extruder (12) and before the step of cutting the bundle coated with the resin.
References Cited (Backward Citations)
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