Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pneumatic tire

A technology of pneumatic tires and tires, which is applied to special tires, tire parts, tire treads/tread patterns, etc., can solve problems such as deterioration of driving stability, achieve excellent performance on ice, and suppress the effect of curing over time

Inactive Publication Date: 2019-09-20
THE YOKOHAMA RUBBER CO LTD
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the softener concentration in the base tread portion is higher than that in the crown portion, there is a problem that driving stability deteriorates

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

[0045] Manufacture the following pneumatic tires (size 195 / 65R15): by having the common formula shown in Table 4, containing 21 kinds of tire cap rubber compositions (embodiments 1-14, standard example, comparison Examples 1 to 6) were used to form the crown, and the base tread was formed from the three types of rubber compositions for the base tread shown in Table 5 (UT composition 1 to UT composition 3). When preparing each rubber composition, components other than sulfur and vulcanization accelerator were weighed, and after kneading for 5 minutes by a 1.7L closed-type Banbury mixer, the masterbatch was discharged and cooled at room temperature. The masterbatch was sent into a 1.7L closed-type Banbury internal mixer, sulfur and a vulcanization accelerator were added, and mixed to obtain various rubber compositions. Table 4 describes the compounding amount (parts by mass) of each compounding agent with respect to 100 parts by mass of the diene rubbers described in Tables 1 to...

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
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
Login to View More

Abstract

Provided is a pneumatic tire with which changes in the physical properties over time are suppressed and excellent performance on ice is maintained. An undertread is made of an undertread rubber composition obtained by blending Wu parts by mass (Wu is 0 or more) of a softening agent U comprising a plasticizer component into 100 parts by mass of a rubber component. A cap tread is made of a cap tread rubber composition obtained by blending, into 100 parts by mass of a diene-based rubber comprising 30% by mass of polybutadiene, the following: at least 30 parts by mass of silica; and Wc parts by mass (Wc is from 20 to 70) of a softening agent C comprising 5 to 30 parts by mass of a resin component having a softening point of 90 to 150DEG C and a plasticizer component. The cap tread rubber composition is such that the mass ratio of the resin component in the softening agent C is 0.1 to 0.5 and the rubber hardness measured at 20DEG C with JIS K6253 Type A is 60 or less. The difference (Wc-Wu) in the blending amounts of the softening agent C and the softening agent U is from 20 to 60 parts by mass.

Description

technical field [0001] The present invention relates to a pneumatic tire which suppresses changes in physical properties over time and maintains excellent on-ice performance. Background technique [0002] In winter pneumatic tires, performance on ice may be improved by blending a large amount of oil components into the tread rubber. In addition, in addition to the requirement of excellent initial performance on ice, it is also required to maintain the performance on ice for many years. However, when the oil component of the tread rubber flows to the outside or transfers to adjacent members during use and during storage from spring to autumn, there is a possibility that the on-ice performance may be reduced. [0003] Therefore, Patent Document 1 proposes to maintain the initial rubber hardness and on-ice performance of the crown portion by making the softener concentration in the base tread portion higher than that in the crown portion. However, when the softener concentrat...

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): C08L9/00B60C1/00B60C11/00C08K3/36C08L101/12
CPCB60C1/0016B60C11/005C08L7/00C08L9/00C08K3/36C08L101/12B60C11/0008B60C11/0075C08L2205/03C08L2205/06
Inventor 中川隆太郎杉浦裕记
Owner THE YOKOHAMA RUBBER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com