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

Pneumatic tire and process for production thereof, and tire curing bladder

A technology for pneumatic tires and a manufacturing method, which is applied to pneumatic tires, special tires, tire parts and other directions, can solve problems such as damage to the inner liner, and achieve the effects of reduced rolling resistance and good resistance to flex crack growth.

Inactive Publication Date: 2013-04-24
SUMITOMO RUBBER IND LTD
View PDF11 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, when producing an unvulcanized tire having an inner liner made of a thin thermoplastic resin composition, if an air bag having such an air bag vent line is used, the inner liner may be damaged when the air bag contracts.

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 and process for production thereof, and tire curing bladder
  • Pneumatic tire and process for production thereof, and tire curing bladder
  • Pneumatic tire and process for production thereof, and tire curing bladder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～35、 comparative example 1～9

[0212] (Production of polymer sheet and polymer laminate)

[0213] According to the formula shown in Table 1, put each formula into the twin-screw extruder (screw diameter: 50mm, L / D: 30, cylinder temperature: 200°C), kneaded at 200 rpm to prepare pellets (manufacturing example 1 to manufacturing example 8). The obtained pellets were put into a co-extruder (cylinder temperature: 200°C) to produce polymer sheets or polymer laminates having structures shown in Tables 3 to 6.

[0214] [Table 1]

[0215]

[0216] (Note 1) SIBS: "Sibstar 102T" manufactured by Kaneka Co., Ltd. (styrene-isobutylene-styrene triblock copolymer, weight average molecular weight 100,000, styrene unit content 25% by mass, Shore A hardness 25).

[0217] (Note 2) SIS: "D1161JP" manufactured by Kraton Polymers (styrene-isoprene-styrene triblock copolymer, weight average molecular weight 150,000, styrene unit content 15% by mass).

[0218] (Note 3) SIB: In a 2L reaction vessel with a stirrer, 589 mL of methylcyclohex...

Embodiment 36～70

[0270]

[0271]

[0272] According to the formula shown in Table 7, put each formula into the twin-screw extruder (screw diameter: 50mm, L / D: 30, cylinder temperature: 200°C), kneaded at 200 rpm to prepare pellets (Production Example 9 to Production Example 15). The obtained pellets were put into a co-extruder (cylinder temperature: 200°C) to produce polymer laminates having structures shown in Tables 9 to 11.

[0273]

[0274] (Note 1) IIR: "Exxon Chlorobutyl 1066" manufactured by Exxon Mobil Corporation.

[0275] (Note 2) NR: Natural rubber TSR20.

[0276] (Note 3) SIBS: "Sibstar 102T" manufactured by Kaneka Co., Ltd. (styrene-isobutylene-styrene triblock copolymer, weight average molecular weight 100,000, styrene unit content 25% by mass, Shore A hardness 25).

[0277] (Note 4) SIS: "D1161JP" manufactured by Kraton Polymers (styrene-isoprene-styrene triblock copolymer, weight average molecular weight 150,000, styrene unit content 15% by mass).

[0278] (Note 5) SIB: In a 2L reacti...

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
number average molecular weightaaaaaaaaaa
viscosity average molecular weightaaaaaaaaaa
weight-average molecular weightaaaaaaaaaa
Login to View More

Abstract

This process for producing a pneumatic tire utilizes a tire curing bladder having multiple vent lines, and is characterized in that the pneumatic tire has an inner liner on the inner surface thereof, the inner liner has an SIBS layer containing a styrene-isobutylene-styrene triblock copolymer, the SIBS layer has a thickness of 0.05 to 0.6 mm inclusive, the SIBS layer contains 0.5 to 40 mass% inclusive of a polymer produced by polymerizing monomer units each having 4 carbon atoms, and the vent lines include a first vent line which is a part corresponding to a part between a tire bead toe part and a tire buttress part and a second vent line which is a part corresponding to a part between the tire buttress part and a tire crown part.

Description

Technical field [0001] The present invention relates to a method of manufacturing a pneumatic tire, and to a method of manufacturing a pneumatic tire manufactured using an airbag for tire vulcanization. Background technique [0002] In recent years, due to the strong social demand for lower fuel consumption of vehicles, people have conducted research on lightweight tires. Even for the inner liner arranged on the inner side of the tire radial direction, weight reduction has been studied. The role of the inner liner is to reduce the amount of air leakage (air permeability) from the inside of the pneumatic tire to the outside and improve the air permeability resistance. [0003] The inner liner currently uses a rubber composition composed of butyl rubber containing 70-100% by mass of butyl rubber and 30-0% by mass of natural rubber. This butyl rubber contains about 1% by mass of isoprene in addition to butene. The isoprene is combined with sulfur, vulcanization accelerator, and zin...

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): B29C33/02B29C33/10B29C35/02B60C5/14
CPCB29C33/02B29D30/0654B29C33/10B60C1/0008B29D2030/0655B60C5/14B29D30/0645B60C2005/145B29C35/02
Inventor 杉本睦树
Owner SUMITOMO RUBBER IND 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