Method for making low noise signal transmission cable
AssigneeW. L. Gore & Associates, Inc.
InventorsDavid T. Singles, Grant Walter, William P. Mortimer, Jr.
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Abstract
An improved low noise electrical signal transmission cable is disclosed. The cable employs an insulative layer of expanded polytetrafluoroethylene (PTFE) which is bonded in fixed relative position with a surrounding shield layer through use of an adhesive, such as fluorinated ethylenepropylene (FEP) or perfluoroalkoxy polymer (PFA). The bonding process reduces the separation of layers which can sometimes occur with expanded PTFE insulative cables and avoids the generation of unwanted triboelectric signals that can result from such separation.
Claims8
A method of producing a low noise electrical signal transmission cable which comprises:
- providing a conductor;
- providing a porous insulative layer comprising at least in part polytetrafluoroethylene;
- laminating said insulative layer to a thermoplastic film layer at a temperature above a melt temperature of the thermoplastic film layer:
- stretching said laminate at a temperature above the melt temperature of the thermoplastic:
- providing a shield layer surrounding the insulative layer;
- and
- bonding the laminate in fixed relative position to the shield to avoid separation and movement between the laminate and the shield during use thereby reducing the formation of triboelectric currents resulting from said movement.
Dependencies are inferred from the claim text.