Power transmission belt

• US 10,024,389 B2
• Filed: 11/11/2016
• Issued: 07/17/2018
• Est. Priority Date: 05/22/2014
• Status: Active Grant

• Current Assignee: Bando Chemical Industries Limited
• Original Assignee: Bando Chemical Industries Limited
• Inventors: Kim, Sungjin, Umeda, Sakae, Nakamoto, Yuji, Shimono, Keiichiro
• Primary Examiner(s): Liu, Henry Y
• Application Number:
  US15/349,804
• Publication Number:
  US 20170058996A1
• Time in Patent Office: 613 Days
• Field of Search: 474266, 474238
• CPC Class Codes: B29D 29/08 Toothed driving belts
• CPC Class Codes: B29D 29/103 Multi-ribbed driving belts
• CPC Class Codes: B29K 2023/16 EPM, i.e. ethylene-propylene copolymers; EPDM, i.e. ethylene-propylene-diene copolymers; EPT, i.e. ethylene-propylene terpolymers
• CPC Class Codes: B29K 2105/0044 Stabilisers, e.g. against oxydation, light or heat
• CPC Class Codes: B29K 2105/0836 Knitted fabrics
• CPC Class Codes: B29K 2105/12 of short lengths, e.g. chopped filaments, staple fibres or bristles
• CPC Class Codes: B29K 2105/16 Fillers
• CPC Class Codes: B29K 2105/24 crosslinked or vulcanised
• CPC Class Codes: B29K 2267/003 PET, i.e. poylethylene terephthalate
• CPC Class Codes: B29K 2277/00 Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as reinforcement
• CPC Class Codes: B29K 2313/00 Use of textile products or fabrics as reinforcement B29K2105/06 takes precedence
• CPC Class Codes: B29K 2507/04 Carbon
• CPC Class Codes: B29K 2509/02 Ceramics
• CPC Class Codes: F16G 5/08 with textile reinforcement
• CPC Class Codes: F16G 5/20 with a contact surface of special shape, e.g. toothed

Abstract

A frictional transmission belt according to the present disclosure has a belt body wound around a pulley to transmit power. The belt includes a water absorptive fabric covering at least one side of the belt body that contacts with the pulley.

Claims

1. A frictional transmission belt having a belt body wound around a pulley to transmit power, wherein

the belt comprises a water absorptive fabric covering at least one side of the belt body that contacts with the pulley,

the water absorptive fabric contains a water absorptive yarn selected from the group consisting of a spun yarn of polyethylene terephthalate, a spun yarn of polyamide, a spun yarn of aramid, or a combination thereof.

2. The frictional transmission belt of claim 1, wherein

the water absorptive fabric is either a woven fabric or a knit fabric, and

the water absorptive fabric is partially embedded in a rubber composition that makes up the belt body.

3. The frictional transmission belt of claim 1, wherein

the yarn forming the water absorptive fabric includes a modified cross-section yarn.

4. The frictional transmission belt of claim 1, wherein

the yarn forming the water absorptive fabric includes a microfiber.

5. The frictional transmission belt of claim 1, wherein

the yarn forming the water absorptive fabric includes a hollow fiber.

6. The frictional transmission belt of claim 1, wherein

the belt is produced by:

winding a fabric around a surface of a rubber layer to form the belt body, thereby forming a molded part;

pressing the molded part onto a belt-molding die having ribbed recesses that define the side to contact with the pulley; and

allowing the molded body to crosslink.

7. The frictional transmission belt of claim 1, wherein

the water absorptive yarn is a covering yarn including a core yarn and a covering fiber, and

the spun yarn is used as the covering yarn.

8. The frictional transmission belt of claim 1, wherein

the water absorptive fabric has been subjected to RFL treatment so that water absorptiveness by capillarity is maintained.