V-ribbed belt and manufacturing method for same

Patent metadata

Field	Value
Publication number	US-11913522-B2
Application number	US-201816615963-A
Country	US
Kind code	B2
Filing date	May 23, 2018
Priority date	May 24, 2017
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

A V-ribbed belt in which a frictional power-transmission surface is formed from a weft knitted multilayer knitted fabric is provided, in which the weft knitted multilayer knitted fabric contains cellulose based natural spun yarn, polyester based composite yarn, and polyamide based yarn, and in that at least the cellulose based natural spun yarn and the polyamide based yarn are disposed in a layer on the frictional power-transmission surface side.

First claim

The invention claimed is:

1. A V-ribbed belt having a frictional power-transmission surface constituted by a multilayer weft-knitted cloth, wherein:
the multilayer weft-knitted cloth comprises a cellulose-based natural spun yarn, a polyester-based composite yarn, and a polyamide-based yarn;
at least the cellulose-based natural spun yarn and the polyamide-based yarn are disposed in a layer on a frictional power-transmission surface side; and
the multilayer weft-knitted cloth has a content of the cellulose-based natural spun yarn of 5 to 40 mass %.

2. The V-ribbed belt according to claim 1 , wherein the multilayer weft-knitted cloth has a content of the polyamide-based yarn of 5 to 60 mass %.

3. The V-ribbed belt according to claim 1 , wherein the multilayer weft-knitted cloth has a mass ratio between the polyamide-based yarn and the cellulose-based natural spun yarn, satisfying a relation of (polyamide-based yarn):(cellulose-based natural spun yarn)=5:95 to 95:5.

4. The V-ribbed belt according to claim 1 , wherein the polyester-based composite yarn included in the multilayer weft-knitted cloth is a bulk textured yarn comprising two or more kinds of polymers having different thermal shrinkage ratios from each other.

5. The V-ribbed belt according to claim 1 , wherein the polyester-based composite yarn included in the multilayer weft-knitted cloth is a conjugate yarn comprising a polyethylene terephthalate (PET).

6. The V-ribbed belt according to claim 1 , wherein the polyamide-based yarn included in the multilayer weft-knitted cloth comprises a nylon or an aramid fiber.

7. The V-ribbed belt according to claim 1 , wherein each of yarns constituting the multilayer weft-knitted cloth has filaments or fibers twisted together.

8. The V-ribbed belt according to claim 1 , wherein the multilayer weft-knitted cloth comprises no polyurethane.

9. The V-ribbed belt according to claim 1 , wherein the multilayer weft-knitted cloth covering the frictional power-transmission surface has a thickness of 0.6 mm or larger.

10. The V-ribbed belt according to claim 1 , wherein the cellulose-based natural spun yarn and the polyamide-based yarn are arranged so as to be distributed uniformly, where 12 adjacent yarns include at least one polyamide-based yarn, in the layer on the frictional power-transmission surface side of the multilayer weft-knitted cloth.

11. The V-ribbed belt according to claim 1 , comprising a rubber as a component, wherein:
the frictional power-transmission surface side of the rubber is covered with the multilayer weft-knitted cloth; and
the multilayer weft-knitted cloth prevents the rubber from seeping out to the frictional power-transmission surface, an area ratio of a portion where the rubber is exposed to the frictional power transmission surface is less than 5%.

12. A manufacturing method of the V-ribbed belt according to claim 1 , comprising:
covering an unvulcanized compression layer sheet with a cylindrical multilayer weft-knitted cloth in which two ends of the multilayer weft-knitted cloth are joined to each other; or
jointing the two ends of the multilayer weft-knitted cloth to each other on an unvulcanized compression layer sheet.

Assignees

• Mitsuboshi Belting Ltd

Inventors

• HAMAMOTO Kouhei
• Nishiyama Takeshi

Classifications

• F16G5/20 Primary

  with a contact surface of special shape, e.g. toothed · CPC title

• B32B5/026

  Knitted fabric · CPC title

• B32B5/08

  the fibres or filaments of a layer being of different substances {, e.g. conjugate fibres, mixture of different fibres} · CPC title

• B32B25/04

  comprising rubber as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/043; next to a bituminous or tarry layer B32B11/044; next to a water setting substance layer B32B13/042; next to a metal layer B32B15/06; next to a glass layer B32B17/063; next to a layer formed of natural mineral fibres or particles B32B19/043; next to a wood layer B32B21/045; next to a cellulosic plastic layer B32B23/046)} · CPC title

• B32B25/10

  next to a fibrous or filamentary layer · CPC title