Core wire for friction transmission belts, friction transmission belt, and manufacturing methods therefor

Patent metadata

Field	Value
Publication number	US-11815158-B2
Application number	US-201917270666-A
Country	US
Kind code	B2
Filing date	Aug 19, 2019
Priority date	Aug 23, 2018
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

The present invention relates to a core wire for a frictional power-transmission belt, the core wire including a Lang lay cord, having a total fineness of 300 to 1000 tex, and including a rubber component adhered to at least a part of a surface of the core wire, in which the Lang lay cord comprises a first-twisted yarn, and in which the first-twisted yarn comprises a carbon fiber.

First claim

The invention claimed is:

1. A V-ribbed belt, comprising:
a compression rubber layer formed of a rubber composition containing a rubber component comprising an ethylene-α-olefin elastomer; and
a core wire,
wherein the V-ribbed belt has a tensile elastic modulus of 240 to 500 N/(mm·%),
wherein the core wire comprises a Lang lay cord,
the core wire has a total fineness of 300 to 1000 tex,
the core wire comprises a rubber component adhered to at least a part of a surface of the core wire,
the Lang lay cord comprises a first-twisted yarn, and
the first-twisted yarn comprises a carbon fiber.

2. The V-ribbed belt according to claim 1 , wherein the first-twisted yarn has a fineness of 190 to 410 tex, and a twist coefficient of 0.5 to 2.

3. The V-ribbed belt according to claim 1 , wherein a number of the first-twisted yarn in the Lang lay cord is 2 to 3, and the core wire has a core wire diameter of 0.7 to 1.2 mm.

4. The V-ribbed belt according to claim 1 , wherein the core wire has a second-twist coefficient of 1 to 7 times a first-twist coefficient.

5. The V-ribbed belt according to claim 1 , wherein the core wire further comprises an adhesive component present between single fibers constituting the first-twisted yarn.

6. The V-ribbed belt according to claim 5 , wherein the first-twisted yarn has an adhesion rate of the adhesive component of 10 to 25 mass % with respect to a raw yarn.

7. The V-ribbed belt according to claim 1 , comprising a rubber layer in which a plurality of the core wire are embedded at predetermined intervals,
wherein the plurality of the core wire comprise an S-twisted Lang lay cord and a Z-twisted Lang lay cord.

8. The frictional power transmission V-ribbed belt according to claim 1 , wherein the V-ribbed belt is to be installed on an engine mounted with a belt-type ISG drive in which a dynamic tension of 85 N/mm or more is applied to the V-ribbed belt per 1 mm of a width thereof.

Assignees

• Mitsuboshi Belting Ltd

Inventors

• Tomoda Takuya
• Nishiyama Takeshi
• Tamura Masashi
• Kurokawa Tomomitsu

Classifications

• F16G1/10 Primary

  with textile reinforcement · CPC title

• B29D29/10

  Driving belts having wedge-shaped cross-section · CPC title

• D02G3/16

  Yarns or threads made from mineral substances · CPC title

• D02G3/28

  Doubled, plied, or cabled threads {(D02G3/32, D02G3/36 take precedence; effect yarns D02G3/34; details of spindles, e.g. bearings D01H7/86)} · CPC title

• D02G3/447

  Yarns or threads for specific use in general industrial applications, e.g. as filters or reinforcement · CPC title