Pneumatic tire

A technology of pneumatic tires and cords, which is applied to the reinforcement layer of pneumatic tires, special tires, tire parts, etc., which can solve the problems of low intermediate stretch, no consideration of controlling BEL long-term durability, and rubber thickness cannot be increased.

Inactive Publication Date: 2013-06-05
SUMITOMO RUBBER IND LTD
View PDF8 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, these cords have a lower intermediate elongation compared with nylon 66 cords, so there is a problem that the rubber thickness between the breaker and the strip cannot be increased, so BEL is prone to occur
[0007] Although JP 7-232511A, JP 10-278508A, and JP 2005-22455A disclose the use of a predetermined hybrid cord as a strip cord, they do not consider controlling the occurrence of BEL and improving long-term durability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0070] The present invention will be specifically described below based on examples, but the present invention is not limited thereto.

[0071] Various chemicals used in Examples and Comparative Examples are as follows.

[0072] NR:TSR20

[0073] SBR: Nipol 1502, manufactured by Zeon Co., Ltd. (E-SBR, styrene content: 23.5% by mass)

[0074]BR (rare earth BR): BUNACB 25, manufactured by Lanxess AG (BR synthesized by using a Nd-based catalyst, cis content: 96% by mass)

[0075] Silica (1): ULTRASIL VN3, manufactured by Evonik-Degussa GmbH (N 2 SA: 175m 2 / g)

[0076] Silica (2): Z1085Gr, manufactured by Rhodia Japan Co., Ltd. (N 2 SA: 80m 2 / g)

[0077] Carbon black (1): N550, manufactured by Mitsubishi Chemical Corporation (N 2 SA: 40m 2 / g)

[0078] Carbon black (2): N326, manufactured by Mitsubishi Chemical Corporation (N 2 SA: 78m 2 / g)

[0079] Carbon black (3): N219, manufactured by Mitsubishi Chemical Corporation (N 2 SA: 76m 2 / g)

[0080] Carbon black (...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
complex modulusaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The present invention provides a pneumatic tire having a jointless band obtained by covering a cord having a cord breaking strength of 200 to 600 N and a degree of elongation at a tension of 66 N of 1.0 to 3.5 % with a rubber composition for band cord topping comprising a given amount of sulfur, a given amount of a predetermined carbon black, a given amount of at least one compound selected by the group consisting of resorcinol resin, modified resorcinol resin, cresol resin, modified cresol resin, phenol resin and modified phenol resin, and a given amount of at least one compound selected from the group consisting of a partial condensate of hexamethoxymethylolmelamine and a partial condensate of hexamethylolmelaminepentamethylether based on a given amount of a rubber component.

Description

technical field [0001] The present invention relates to a pneumatic tire having a jointless band. Background technique [0002] In the automotive field in recent years, wear resistance and low rolling resistance (LRR) of tires are required, and various strategies are employed. On the other hand, although the improvement in tire wear resistance prolongs the service period of the tire, the durability (internal damage) of the tire is concerned. A representative example of internal damage is tread portion damage (BEL: Breaker Edge Loose) originating from a breaker edge. [0003] Conventionally, in order to improve the durability of the tread portion or the uniformity of the ground contact, a strip such as a seamless belt or a breaker edge strip is used, wherein the seamless belt is provided on the outer side of the breaker in the tire radial direction so as to be in contact with the breaker. Contacts, or breaker edge strips, are provided on the edges of the breaker, both of wh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00B60C9/00C08L9/00C08K3/06C08K3/04C08K3/36
CPCC08L7/00B60C2009/209B60C1/00B60C2009/2067B60C2009/2064B60C9/2009B60C2001/0083B60C9/005C08L21/00B60C9/04B60C2009/2093B60C2009/2242C08K3/04C08K5/34922C08L61/06
Inventor 伊藤博宫崎达也
Owner SUMITOMO RUBBER IND LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap