Linear shape member and producing method therefor

Patent metadata

Field	Value
Publication number	US-11164684-B2
Application number	US-202016740102-A
Country	US
Kind code	B2
Filing date	Jan 10, 2020
Priority date	Jan 22, 2019
Publication date	Nov 2, 2021
Grant date	Nov 2, 2021

Abstract

A linear shape member is composed of a linear shape electrical insulating body made of a fluoropolymer resin and including a plurality of crack shape grooves on a surface thereof, and a plating layer coating the surface of the electrical insulating body. The surface of the electrical insulating body meets at least either one of two conditions: that the surface of the electrical insulating body is not lower than 40 nm in arithmetic mean roughness Ra; and that the surface of the electrical insulating body is not lower than 80 nm in root mean square roughness Rms.

First claim

What is claimed is:

1. A linear shape member producing method, comprising:
performing a roughening treatment on a surface of a linear shape electrical insulating body comprising a fluoropolymer resin; and
after the roughening treatment, performing a plating treatment on the surface of the electrical insulating body to form a plating layer thereon,
wherein the roughening treatment is an immersing treatment in a sodium naphthalene complex solution, a low temperature blasting treatment, or an electron beam irradiation, and
wherein at least either one of the following two conditions is met: that the arithmetic mean roughness Ra of the surface of the electrical insulating body is increased by the roughening treatment up to 1.7 times or higher than before the roughening treatment; and that the root mean square roughness Rms of the surface of the electrical insulating body is increased by the roughening treatment up to 2 times or higher than before the roughening treatment.

2. The linear shape member producing method according to claim 1 , wherein the roughening treatment is the immersing treatment in the sodium naphthalene complex solution, with the state of the surface of the electrical insulating body, which results from the roughening treatment, meeting at least either one of the following two conditions: that the surface of the electrical insulating body is not lower than 40 nm in arithmetic mean roughness Ra; and that the surface of the electrical insulating body is not lower than 80 nm in root mean square roughness Rms.

3. The linear shape member producing method according to claim 1 , wherein the roughening treatment is the low temperature blasting treatment, which is the blasting treatment with the electrical insulating body being reduced in temperature by using a liquid nitrogen.

4. A linear shape member producing method, comprising:
performing a hydrophilizing treatment on a surface of a linear shape electrical insulating body comprising a fluoropolymer resin; and
after the hydrophilizing treatment, performing a plating treatment on the surface of the electrical insulating body to form a plating layer thereon,
wherein, in an infrared total internal reflection absorption spectrum in the surface of the electrical insulating body after the hydrophilizing treatment, a value obtained by normalizing (dividing) a value of an integral of an absorption peak, which is ascribed to a carboxy group, by a value of an integral of an absorption peak, which is ascribed to a C-F stretching vibration of the fluoropolymer resin, is not smaller than 0.02.

5. The linear shape member producing method according to claim 4 , wherein the hydrophilizing treatment is an immersing treatment in a sodium naphthalene complex solution.

6. The linear shape member producing method according to claim 4 , wherein the carboxy group in the surface of the electrical insulating body is increased in amount by the hydrophilizing treatment up to 6 times or larger than before the hydrophilizing treatment.

7. A linear shape member, comprising:
a linear shape electrical insulating body comprising a fluoropolymer resin; and
a plating layer coating a surface of the electrical insulating body, with a hydroxy group being present in the surface of the electrical insulating body,
wherein, in an infrared total internal reflection absorption spectrum in the surface of the electrical insulating body, a value obtained by normalizing (dividing) a value of an integral of an absorption peak, which is ascribed to a carboxy group, by a value of an integral of an absorption peak, which is ascribed to a C-F stretching vibration of the fluoropolymer resin, is not smaller than 0.02.

Assignees

• Hitachi Metals Ltd

Inventors

• Suenaga Kazufumi
• Sagawa Hideyuki
• Sugiyama Takahiro

Classifications

• C23C18/405

  Formaldehyde · CPC title

• H01B13/06

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

• H01B13/165

  by spraying · CPC title

• H01B3/445

  from vinylfluorides or other fluoroethylenic compounds · CPC title

• H01B13/0036

  Details · CPC title