Cable with adhesively bonded sheath

• US 4,484,023 A
• Filed: 07/19/1982
• Issued: 11/20/1984
• Est. Priority Date: 07/19/1982
• Status: Expired due to Term

• Current Assignee: Commscope Solutions Properties LLC (CommScope Holding Company, Inc.)
• Original Assignee: CommScope Inc. (CommScope Holding Company, Inc.)
• Inventors: Gindrup, Wayne L.
• Primary Examiner(s): Gonzales, John F.
• Assistant Examiner(s): Nimmo, Morris H.
• Application Number:
  US06/399,346
• Time in Patent Office: 855 Days
• Field of Search: 174/102 R, 174/107, 174/110 PM, 174/110 F, 525/330.2, 524/556, 156/332
• US Class Current: 174/102.00R
• CPC Class Codes: C09J 123/08 Copolymers of ethene C09J123/16 takes precedence
• CPC Class Codes: H01B 11/1839 of cellular structure
• CPC Class Codes: H01B 13/225 Screening coaxial cables
• CPC Class Codes: H01B 13/2633 Bending and welding of a metallic screen
• CPC Class Codes: H01B 3/441 from alkenes

Abstract

An electrical cable comprising a core having at least one inner conductor surrounded by a dielectric material, a metallic sheath surrounding said core, and an adhesive bonding said metallic sheath to said core, said adhesive comprising a water dispersible copolymer of ethylene and an ethylenically unsaturated carboxylic acid forming a thin film between said metallic sheath and said core.

Claims

1. An electrical cable comprising a core having at least one inner conductor surrounded by a dielectric material, a metallic sheath surrounding said core, and an adhesive bonding said metallic sheath to said core, said adhesive comprising a dried water dispersible copolymer of ethylene and an ethylenically unsaturated carboxylic acid forming a thin film between said metallic sheath and said core, and wherein said copolymer is rendered water dispersible by partial neutralization of the ethylenically unsaturated carboxylic acid by reaction with a monovalent metal hydroxide, and wherein a portion of said carboxylic acid is unreacted to provide carboxyl groups present in the adhesive for effecting bonding between said metallic outer conductor and said core.

2. A cable according to claim 1 wherein said thin film of adhesive has a thickness no greater than about one mil.

3. A cable according to claim 1 wherein said dielectric material comprises a foam plastic material and said metallic sheath comprises a longitudinally welded metal tube.

4. A cable according to claim 1 wherein said dielectric material comprises a foam plastic material and said metallic sheath comprises an extruded seamless metal tube.

5. A cable according to claim 1 wherein said dielectric material comprises a foam plastic material and said metallic sheath comprises a metal strip wrapped about said core.

6. A cable according to claim 1 wherein the copolymer contains at least 2 percent by weight of unreacted ethylenically unsaturated carboxylic acid.

7. A cable according to claim 1 wherein the adhesive comprises an ethylene acrylic acid copolymer containing at least 15 percent by weight acrylic acid.

8. An electrical cable comprising a core having at least one inner conductor and a foam dielectric surrounding said at least one inner conductor, a metallic sheath surrounding said core, and an adhesive bonding said metallic sheath to said core, said adhesive comprising a dried water dispersible random copolymer of ethylene and acrylic acid containing at least 15 percent by weight acrylic acid, with a portion of the acrylic acid being neutralized by reaction with a monovalent metal hydroxide to render the copolymer water dispersible, and with at least 2 percent of the acrylic acid being unreacted to provide carboxyl groups present in the adhesive for effecting bonding between said metallic sheath and said core.

9. An electrical cable comprising a core having at least one inner conductor and a foam dielectric surrounding said at least one inner conductor, a metallic sheath surrounding said core, and an adhesive bonding said metallic sheath to said core, said adhesive comprising a dried water dispersible random copolymer obtained from the copolymerization of ethylene and acrylic acid, with a portion of the acrylic acid being neutralized by reaction with a monovalent metal hydroxide to render the copolymer water dispersible, and wherein a portion of said carboxylic acid is unreacted to provide carboxyl groups present in the adhesive for effecting bonding between said metallic outer conductor and said core.