Resin sheet for flexible flat cable and flexible flat cable
AssigneeSumitomo Electric Industries, Ltd.
InventorsYutaka Fukuda, Tatsuo Matsuda, Chiaki Kojima, Shoei Yonezawa
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Abstract
A resin sheet for a flexible flat cable is layered between a plurality of conductors arranged in parallel and a shield layer layered on the outer surface side of the plane in which the plurality of conductors are arranged in parallel, and has one or more insulating layers. The resin sheet for a flexible flat cable has a base insulating layer that has a tensile elastic modulus of 40-450 MPa, a dielectric loss tangent of at most 0.0014, and a relative permittivity of at most 2.3 at 25° C. and 10 GHZ, and that contains an olefin-based thermoplastic elastomer as the main component thereof. The average thickness of the base insulating layer is 20-450 μm.
Claims5
A resin sheet for a flexible flat cable, the resin sheet comprising one or a plurality of insulating layers and being layered between a plurality of conductors arranged in parallel and a shield layer layered on an outer surface side of parallel arranged surfaces of the plurality of conductors,
- wherein the resin sheet has a relative dielectric constant of 2.3 or less at 25° C. and 10 GHz, and a dielectric loss tangent of 0.0014 or less,
- wherein the resin sheet has a tensile elastic modulus of 40 MPa to 450 MPa,
- wherein the resin sheet includes a base insulating layer containing a thermoplastic olefinic elastomer as a primary component, and
- wherein an average thickness of the base insulating layer is 20 μm to 450 μm.
Dependencies are inferred from the claim text.