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Pneumatic tire and method for producing same

A technology of pneumatic tires and manufacturing methods, applied to tire parts, no separate inflatable pads, tires, etc., can solve the problems of increased manufacturing time, poor tire productivity, and deterioration of tire productivity, so as to ensure puncture sealing and prevent Effect of deterioration of rolling resistance

Active Publication Date: 2020-04-21
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a step of peeling the film after vulcanization is required, and the production time increases, so there is a problem that the productivity of the tire deteriorates.
In addition, there is a proposal to clean the inner surface of the tire with the release agent attached, but the release agent cannot be sufficiently removed by such a method, and there is a problem that the tire productivity is poor

Method used

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  • Pneumatic tire and method for producing same
  • Pneumatic tire and method for producing same
  • Pneumatic tire and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] Manufactured: In a pneumatic tire having a tire size of 255 / 40R20 and a sealant layer arranged along the tire circumferential direction on the inner surface of the tread portion, the removal method of the release agent was set as shown in Table 1 and Table 2, and the method of removing the release agent into the tire was produced. Surface coating of a release agent, use of an airbag provided with a coating layer composed of a release agent during vulcanization, comparative examples 1 to 5 of the thickness (μm) of the release agent and the thickness (μm) of the sealant layer on the inner surface of the tire, and The tires of Examples 1-7.

[0049] In Comparative Example 1, a release agent was applied to the inner surface of the tire, and the removal of the release agent was not performed. In addition, in Comparative Examples 2 to 4, a mold release agent was applied to the inner surface of the tire, and the mold release agent was removed after the vulcanization process wa...

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Abstract

Provided are: a pneumatic tire which enables the achievement of a good balance between air retention ability and adhesion of a sealant layer without deteriorating the tire productivity by bonding thesealant layer to the inner surface of the tire, with a mold release agent adhering to the inner surface of the tire; and a method for producing this pneumatic tire. A pneumatic tire which is vulcanized using a bladder that is provided with a coating layer that is formed from a mold release agent, and wherein: a sealant layer 6 is arranged on the inner surface of a tread part (1) in the tire circumferential direction; and the thickness of the mold release agent as detected by an electron microscope is 0.1 [mu]m to 100 [mu]m at least in the region where the sealant layer (6) is arranged.

Description

technical field [0001] The present invention relates to a pneumatic tire and its manufacturing method. More specifically, it relates to a pneumatic tire capable of achieving both air retention and adhesiveness of the seal layer by affixing a seal layer with a release agent attached to the inner surface of the tire. Pneumatic tire which does not deteriorate tire productivity and its manufacturing method. Background technique [0002] As a pneumatic tire having puncture-tightness, a pneumatic tire is proposed in which a sealing layer made of an adhesive sealant is disposed on a region of the tire inner surface corresponding to the tread portion (for example, Patent Document 1). In a pneumatic tire equipped with such a sealing layer, when a foreign matter such as a nail penetrates into the tread portion, the adhesive sealant sticks to the foreign matter, and as the foreign matter falls off, the adhesive sealant is guided to the puncture hole and exerts its Sealing effect. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/02B29C35/02B29C73/16B29D30/06B60C19/12B29L30/00
CPCB29C33/02B29C35/02B29C73/16B29D30/06B60C19/122B60C5/14B29C33/58B29D30/0601B29D30/0685B29D2030/0694B29D2030/0695B29D30/0654
Inventor 干场崇史成濑雅公
Owner THE YOKOHAMA RUBBER CO LTD
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