Extruded flexible flat cable

Patent metadata

Field	Value
Publication number	US-10147516-B2
Application number	US-201715405544-A
Country	US
Kind code	B2
Filing date	Jan 13, 2017
Priority date	Mar 12, 2010
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

An extruded flexible flat cable, which has a superior formability, flexibility, adhesiveness, and fire-retardancy, with a low manufacturing cost, is adapted for sliding door of a motor vehicle and also other parts, and has a conductor covered with an insulation layer extrude-formed with an extrusion molding method, and the insulation layer formed from a fire-retardant resin composition containing a modified polybutylene terephthalate and a fire-retardant additive, where the fire-retardant resin composition has a melting point of 170-215 degrees C. measured in reference to JIS K7121 with a differential thermal analysis at a rate of temperature increase of 10 degrees C. per minute.

First claim

The invention claimed is:

1. An extruded flexible flat cable having a conductor covered with an insulation layer extrude-formed with an extrusion molding method,
the insulation layer being formed from a fire-retardant resin composition containing a resin composition and a fire-retardant additive,
the fire-retardant resin composition having a melting point of 170-215 degrees C. measured with a differential thermal analysis at a rate of temperature increase of 10 degrees C. per minute,
wherein a resin component of the resin composition consists of a modified polybutylene terephthalate,
wherein the fire-retardant additive consists of organic/inorganic acid, and
wherein the modified polybutylene terephthalate is a copolymer obtained by copolymerizing a terephthalic acid or its reaction derivative, 1,4-butanediol and a monomer copolymerizable with the 1,4-butanediol.

2. The extruded flexible flat cable as claimed in claim 1 , wherein the insulation layer around the conductor is formed with an extrusion molding machine by extruding a single layer of the fire-retardant resin composition around the conductor supplied to a cross head of the extrusion molding machine.

3. The extruded flexible flat cable as claimed in claim 2 , wherein the conductor has a thickness of at least 0.1 mm and the flat cable has a flexion cycle of at least 7*10 4 measured with a flexural fatigue tester at a flexion radius of R=10 and at a temperature of 25 ±3 degrees C.

4. The extruded flexible flat cable as claimed in claim 3 , wherein the extruded flexible flat cable is adapted for electrical connection between a movable portion and a stationary portion of a motor vehicle.

5. The extruded flexible flat cable as claimed in claim 2 , wherein the extruded flexible flat cable is adapted for electrical connection between a movable portion and a stationary portion of a motor vehicle.

6. The extruded flexible flat cable as claimed in claim 1 , wherein the extruded flexible flat cable is adapted for electrical connection between a movable portion and a stationary portion of a motor vehicle.

7. The extruded flexible flat cable as claimed in claim 1 , wherein the flexible flat cable has a flame retardancy such that a flame disappears within 30 seconds after the flexible flat cable is exposed to a flame for 10 seconds.

8. The extruded flexible flat cable as claimed in claim 1 , wherein the modified polybutylene terephthalate is formed of one of:
I) a dicarboxylic acid containing terephthalic acid and isophthalic acid with a mole ratio of 87.5/12.5, and 1,4-butanediol as a diol component;
II) a dicarboxylic acid containing terephthalic acid and isophthalic acid with the mole ratio of 75/25, and 1,4-butanediol as a diol component; and
III) a combination of I and II in a 1-to-1 weight ratio.

9. The extruded flexible flat cable as claimed in claim 1 , wherein the extruded flexible flat cable has a peeling strength of at least 40 MPa at 180°.

10. The extruded flexible flat cable as claimed in claim 1 , wherein the fire-retardant additive includes a salt of Ca, Mg and Al of a lower alkyl phosphinic acid.

Assignees

• Yazaki Corp

Inventors

• Yamada Maki
• Goshima Kazuya

Classifications

• H01B7/295 Primary

  using material resistant to flame · CPC title

• H01B7/0823 Primary

  Parallel wires, incorporated in a flat insulating profile · CPC title

• C08K5/13

  Phenols; Phenolates · CPC title

• B60R16/02

  electric {constitutive elements} · CPC title

• C08K5/5313

  Phosphinic compounds, e.g. R2=P(:O)OR' · CPC title