Patent EP0140664A2 successfully refreshed from Google Patents.
EP0140664A2
Expired / Lapsed
EP
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Radio wave shielding materials and a method of producing the same
Assignee: Bridgestone Corp
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Filing: 1984-10-19
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Granted: —
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Expires: 2004-10-19
Abstract
Abstract A radio wave shielding material and a method of producing the same are disclosed. The radio wave shielding material comprises a plastic foamed body of three-dimensional network skeleton structure, a metal plating coat formed on the skeleton surface, and a coating of conductive rubber and/or plastic formed on the metal plating coat.
Inventors
- 👤 Tomio Oyachi
- 👤 Hiroya Fukuda
- 👤 Masahiko Anami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 16:17
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0015; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249967; Y10T428/24997
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
45 words
A radic wave shielding material, characterised by comprising a plastics foamed body having a three-dimensional network skeleton structure and provided on its skeleton surface with a metal plating coat, and a coating of a conductive rubber and/or plastics formed on the said metal plating coat.
Claim 2
Dependent Claim
45 words
A radic wave shielding material, characterised by comprising a plastics foamed body having a three-dimensional network skeleton structure and provided on its skeleton surface with a metal plating coat, and a coating of a conductive rubber and/or plastics formed on the said metal plating coat.
Claim 3
Dependent Claim
46 words
A radio wave shielding material as claimed in claim 1, characterised in that the said plastics foamed body is an open-cell polyurethane foam of three-dimensional network skeleton structure having a porosity such that an average cell number per 25 mm of straight line is 10-40 cells.
Claim 4
Dependent Claim
30 words
A radio wave shielding material as claimed in claim 1 or 2, characterised in that the said plastics foamed body has a volume resistivity of not more than 100 Q.cm.
Claim 5
Dependent Claim
30 words
A radio wave shielding material as claimed in any of claims 1 to 3, characterised in that the said metal plating coat is a nickel or nickel alloy plating coat.
Claim 6
Dependent Claim
31 words
A radio wave shielding material as claimed in any of claims 1 to 4, characterised in that the said metal plating coat has a thickness of not more than 6 u.
Claim 7
Dependent Claim
37 words
A radio wave shielding material as claimed in any of claims 1 to 5, characterised in that the said conductive rubber and/or plastics is selected from conductive silicone rubber, conductive acrylic rubber and modified conductive acrylic rubber.
Claim 8
Dependent Claim
35 words
A radio wave shielding material as claimed in any of claims 1 to 6, characterised in that the said coating of conductive rubber and/or plastics has a volume resistivity of not more than 100 Q.cm.
Claim 9
Dependent Claim
40 words
A radio wave shielding material as claimed in any of claims 1 to 7, characterised in that the said material is provided on at least one surface with a release paper through a bonding agent locally or wholly applied thereto.
Claim 10
Independent Claim
91 words
A method of producing a radio wave shielding material, characterised by comprising: forming a metal plating coat on a surface of a plastics foamed body having a three-dimensional network skeleton structure; impregnating or applying a liquid composition containing a conductive rubber and/or plastics to the said plastics foamed body; subjecting the said body to a compression deformation to squeeze out an excess amount of the said liquid composition while the said metal plating coat is partially broken to provide a proper compression modulus; and curing the said conductive rubber and/or plastics.
Claim 11
Independent Claim
91 words
A method of producing a radio wave shielding material, characterised by comprising: forming a metal plating coat on a surface of a plastics foamed body having a three-dimensional network skeleton structure; impregnating or applying a liquid composition containing a conductive rubber and/or plastics to the said plastics foamed body; subjecting the said body to a compression deformation to squeeze out an excess amount of the said liquid composition while the said metal plating coat is partially broken to provide a proper compression modulus; and curing the said conductive rubber and/or plastics.
Claim 12
Dependent Claim
22 words
A method as claimed in claim 9, characterised in that the said metal plating coat is formed by an electroless plating process.
Claim 13
Dependent Claim
27 words
A method as claimed in claim 10, characterised in that the said plastics foamed body is subjected to a surface treatment prior to the said electroless plating.
Claim 14
Independent Claim
24 words
A method as claimed in any of claims 9 to 11, characterised in that the said compression deformation is a compression strain of 10-90%.
References Cited (Backward Citations)
No citation records indexed.
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