Cable with insulating part and method of producing cable insulating part

Patent metadata

Field	Value
Publication number	US-11315705-B2
Application number	US-201916401292-A
Country	US
Kind code	B2
Filing date	May 2, 2019
Priority date	Sep 4, 2018
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

A cable includes an insulating part and one or more conducting parts disposed inside the insulating part. The insulating part includes a polymer resin layer with a product of shrinkage ratios CMD*TD, which is expressed as a product of a longitudinal shrinkage ratio and a transverse shrinkage ratio, of less than 0.24.

First claim

What is claimed is:

1. A cable comprising:
an insulating part; and
one or more conducting parts disposed inside the insulating part,
wherein the insulating part comprises a polymer resin layer with a product of shrinkage ratios C MD*TD of less than 0.24, as expressed in Equation 1 below:
[Equation 1]C MD*TD =C MD ×C TD ,
where C MD*TD is a product of shrinkage ratios, C MD is a longitudinal shrinkage ratio (%), and C TD is a lateral shrinkage ratio (%),
wherein a larger one of the longitudinal shrinkage ratio and the lateral shrinkage ratio of the polymer resin layer is less than or equal to 1.2%,
wherein the insulating part comprises a polymer resin layer with an intrinsic viscosity retention ratio D iv of 70% or greater, as expressed in Equation 2 below:
[Equation 21]D iv =100×(IV 2 /IV 1 ),
where D iv is an intrinsic viscosity retention ratio, IV 1 is an intrinsic viscosity (dl/g) of the polymer resin layer before a pressure cooker test at 121° C. and 100 RH % for 96 hours, and IV 2 is an intrinsic viscosity (dl/g) of the polymer resin layer after the pressure cooker test,
wherein the insulating part is a polyester layer containing diol-based repeating units and dicarboxylic acid-based repeating units,
wherein the dicarboxylic acid-based repeating units contains about 5 mol % to about 20 mol % isophthalic acid-based repeating units with respect to all the dicarboxylic acid-based repeating units,
wherein the diol-based repeating units comprise a first diol-based repeating unit having a cyclohexane skeleton and a second diol-based repeating unit,
wherein an amount of the first diol-based repeating unit is 85 mol % or greater with respect to all the diol-based repeating units, and
wherein the second diol-based repeating unit is selected from the group consisting of spiroglycol, 1,3-propanediol, 1,2-octanediol, 1,3-octanediol, 2,3-butanediol, 1,3-butanediol, 1,5-pentanediol, 2,2-dimethyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, 2,2-diethyl-1,5-pentanediol, 2,4-diethyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,1-dimethyl-1,5-pentanediol, and combinations thereof.

2. The cable of claim 1 , wherein a smaller one of the longitudinal shrinkage ratio and the lateral shrinkage ratio of the polymer resin layer is less than or equal to 0.3%.

3. The cable of claim 1 , wherein the polymer resin layer has an intrinsic viscosity of 0.55 dl/g or greater after a pressure cooker test at 121° C. and 100 RH %, for 96 hours.

4. The cable of claim 1 , wherein the cable is a flexible flat cable.

5. A cable comprising:
an insulating part; and
one or more conducting parts disposed inside the insulating part,
wherein the insulating part comprises a polymer resin layer with an intrinsic viscosity retention ratio D iv of 70% or greater, as expressed in Equation 2 below:
[Equation 2]
D iv =100× (IV 2 /IV 1 ),
where D iv is an intrinsic viscosity retention ratio, IV 1 is an intrinsic viscosity (dl/g) of the polymer resin layer before a pressure cooker test at 121° C. and 100 RH % for 96 hours, and IV 2 is an intrinsic viscosity (dl/g) of the polymer resin layer after the pressure cooker test,
wherein a larger one of a longitudinal shrinkage ratio and a lateral shrinkage ratio of the polymer resin layer is less than or equal to 1.2%,
wherein the insulating part is a polyester layer containing diol-based repeating units and dicarboxylic acid-based repeating units,
wherein the dicarboxylic acid-based repeating units contains about 5 mol % to about 20 mol % isophthalic acid-based repeating units with respect to all the dicarboxylic acid-based repeating units,
wherein the diol-based repeating units comprise a first diol-based repeating unit having a cyclohexane skeleton and a second diol-based repeating unit,
wherein an amount of the first diol-based repeating unit is 85 mol % or greater with respect to all the diol-based repeating units, and
wherein the second diol-based repeating unit is selected from the group consisting of spiroglycol, 1,3-propanediol, 1,2-octanediol, 1,3-octanediol, 2,3-butanediol, 1,3-butanediol, 1,5-pentanediol, 2,2-dimethyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, 2,2-diethyl-1,5-pentanediol, 2,4-diethyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,1-dimethyl-1,5- pentanediol, and combinations thereof.

6. The cable of claim 5 , wherein a smaller one of a longitudinal shrinkage ratio and a lateral shrinkage ratio of the polymer resin layer is less than or equal to 0.3%.

7. The cable of claim 5 , wherein the polymer resin layer comprises an intrinsic viscosity of 0.55 dl/g or greater after the pressure cooker test.

8. The cable of claim 5 , wherein the cable is a flexible flat cable.

9. The cable of claim 5 , wherein the polymer resin layer comprises an intrinsic viscosity retention ratio D iv of about 75% to about 85%.

Assignees

• Skc Co Ltd

Inventors

• Lee Sechul
• Heo Young Min
• Ki Jung Hee
• Choi Sang Min

Classifications

• H01B7/0838 Primary

  Parallel wires, sandwiched between two insulating layers · CPC title

• H01B7/02

  Disposition of insulation · CPC title

• H01B3/421 Primary

  Polyesters · CPC title

• H01B13/06

  Insulating conductors or cables (H01B13/32 takes precedence) · CPC title

• H01B3/307

  Other macromolecular compounds · CPC title