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Belt

a belt and body technology, applied in the field of belts, can solve the problems of belt body abraded and cracked, belts with insufficient durability in some cases, etc., and achieve the effects of excellent durability, not only in abrasion resistance, and hardly causing abrasion

Inactive Publication Date: 2017-02-16
NITTA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The belt composition significantly improves durability by reducing abrasion, damage, and cracking, even under high-load conditions, and extends the belt's lifespan by offering remarkable resistance to bending fatigue and abrasion.

Problems solved by technology

However, if conventional flat belts and V-belts having a belt body thereof formed from a thermoplastic elastomer such as a thermoplastic polyurethane elastomer are used as high-load power transmission belts, the belt body abrades and cracks in an early stage, and provides the belts with insufficient durability in some cases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0127]100 parts by weight of TPU-1 and 10 parts by weight of MAH-EPDM were kneaded using a twin-screw extruder (made by Technovel Corp., trade name “KZW20TW-30”). The extruder was set at a barrel temperature of 200° C. (here, a feeder portion temperature of 160° C.) and a screw rotation frequency of 300 rpm; and the resins were melt. kneaded, and passed through a pelletizer to thereby fabricate a pellet. The obtained pellet was injection molded using an injection molding machine (made by Nissei Plastic Industrial Co., Ltd., trade name “NEX110-18E”) to thereby fabricate test pieces [100 mm×100 mm×2 mm thick (for abrasion test), 120 mm×10 mm×4 mm thick (for Demattja flex test)].

example 2

[0129]A pellet and test pieces were fabricated by the same operation as in. Example 1, except for using 100 parts by weight of TPU-2 and 10 parts by weight of MAH-EPDM as raw material resins.

example 3

[0131]A pellet and test pieces were fabricated by the same operation as in Example 1, except for using 100 parts by weight of TPU-3 and 5 parts by weight of MAH-EPDM as raw material resins. An MAH-EPDM particle in an obtained thermoplastic elastomer alloy had an average dispersed particle aspect ratio of 1.23 and an average dispersed particle diameter of 0.35 μm.

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Abstract

In the belt according to the present invention, the whole or a part of a belt body is formed from a thermoplastic resin composition (C) comprising a thermoplastic resin W and a modified ethylene copolymer (B) dispersed and contained. therein. The modified ethylene copolymer (B) is preferably a copolymer, modified with an unsaturated carboxylic acid or a derivative thereof, of ethylene with at least one monomer component selected from (i) olefin components except for ethylene, (ii) diene components and (iii) ester components having an ethylenically unsaturated group. The belt according to the present invention hardly causes abrasion, damage, cracks, breakage and the like on the belt body and is remarkably excellent in durability, even if the belt is used at a high load for a long time.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application a Divisional of copending application Ser. No. 14 / 007,818, filed on Sep. 26, 2013, which was filed as PCI International Application No. PCT / JP2012 / 059281 on Mar. 29, 2012, which claims the benefit under 35 U.S.C. §119(a) to Patent Application No. 2011-081232, filed in Japan on Mar. 31, 2011, all of which are hereby expressly incorporated by reference into the present application.TECHNICAL FIELD[0002]The present invention relates to a belt (excluding toothed belts) utilized for power transmission, conveyance and the like, particularly to a belt in which the whole or a part of a belt body is formed from a specific thermoplastic resin composition.BACKGROUND ART[0003]Conveyance belts and transmission belts require bending fatigue resistance, abrasion resistance, heat resistance, durability and the like, for example, as flat belts, V-belts and the like. Belts are usually imparted with a tension and used in an elongated state. ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08L75/06F16G1/14B65G15/32
CPCC08L75/06C08L2207/04F16G1/14B65G15/32C08L23/0869C08L23/16C08L23/26C08L67/02C08L67/025C08L75/04C08L77/02C08L77/06C08L77/12C08G69/40C08G69/44C08L53/025C08G18/4854C08G18/4277C08G2350/00C08G2380/00C08G2410/00Y10T428/1372C08L75/08C08L101/00C08J5/00C08L75/12
Inventor YOSHIDA, TAKAHIKOSHIMIZU, SHOJIMATSUMOTO, AKIHIKO
Owner NITTA CORP