A pneumatic tire is vulcanized using a bladder provided with a coating layer formed of a release agent, and includes a sealant layer disposed on an inner surface of a tread portion in a tire circumferential direction. The amount of silicon of the release agents detected in at least a placement region of the sealant layer by fluorescence X-ray analysis is from 0.1 wt. % to 10.0 wt. %.

Processes for producing a sealant layer-tire inner liner combination as well as a sealant layer-containing tire and related processes involving the sealant layer-containing tire are disclosed. The sealant layer is adhered to the tire inner liner, has a thickness of 2-8 mm and comprises 100 parts of at least one rubber, 90-500 phr of at least one tackifier, optionally one or more extenders, optionally at least one hydroscopic substance, and a cure package.

This invention reveals an uncured pneumatic tire which is comprised of a generally toroidal-shaped supporting carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead, sidewalls extending radially from and connecting said tread to said beads, a sealant layer which is disposed inwardly from the supporting carcass, and an innerliner which is disposed inwardly from the sealant layer, wherein said circumferential tread is adapted to be ground-contacting, and wherein the sealant layer is comprised of polyisobutylene or a butyl rubber, wherein the polyisobutylene or the butyl rubber has a number average molecular weight which is within the range of 30,000 to 100,000.

A pneumatic tire is vulcanized using a bladder provided with a coating layer formed of a release agent, and includes a sealant layer disposed on an inner surface of a tread portion in a tire circumferential direction, the release agent having a thickness of from 0.1 μm to 100 μm in at least a placement region of the sealant layer, detected using an electron microscope.

Tires having a magnetic tire sealing material containing magnetic particles are described for detecting the presence of one or more sealed punctures in the tire. The tires can have a sealed tire portion that is formed by the magnetic tire sealing material flowing into and filling a puncture in the tire. The sealed tire portion includes a portion having magnetic particles and the portion being at the outer surface of the tire such as in the tread area. The tire can be positioned within the detection zone of an apparatus capable of detecting magnetic particles to indicate whether the tire contains a sealed puncture filled with the magnetic tire sealing material.

The present disclosure relates to a process and a system for manufacturing an HSST tyre, as well as the HSST tyre manufactured by the same. The process for manufacturing an HSST tyre includes a cleaning step, a spraying step, and a forced-cooling step. The cleaning step includes an air-drying procedure for evaporating the isopropanol solution on the tyre to be treated with air-drying gases. The forced-cooling step is configured to forcibly cool the tyre to be treated that has been sprayed with the high molecular organic material. By means of accurate design for each step and procedure, the relying on operator's experience is eliminated and thus the performance stability of the HSST tyre is guaranteed. By means of the air-cooling procedure and the forced-cooling step, the time taken to manufacture an HSST tyre is substantially shortened, making it possible to produce the HSST tyre in a large scale.

Tires having an electrically conductive tire sealing material containing metallic electrically conductive particles are described for detecting the presence of one or more sealed puncture areas in the tire. The tires can have a sealed tire portion that is formed by the electrically conductive tire sealing material flowing into and filling a puncture in the tire. The sealed tire portion includes a portion having electrically conductive particles and the portion being at the outer surface of the tire such as in the tread area. The tire can be positioned to be in contact with a conductive section of an apparatus capable of measuring electrical conductivity.

A method for improving a cement spraying efficiency for a self-repairing tire includes: inputting tire parameters into a control system, including rim diameter, section width, aspect ratio, cement thickness and cement density; calculating a cement spraying amount for a tire; calculating a crown cement thickness separately; starting a spraying device, and evenly spraying a cement in a cement storage tank on a tire surface; and finally drying, that is, heating to speed up solidification of the cement, thereby completing self-repair. The control system automatically calculates the cement spraying amount required for repair based on the tire parameters such as section width, aspect ratio and rim diameter, and realizes mass production of self-repairing tires according to the characteristics of the tires. The method is applicable to all tires of different specifications, and can realize a one-time spraying operation, thereby improving the spraying efficiency for self-repairing tires.

Tire sealant, pneumatic vehicle tire comprising the sealant and process for detecting a pneumatic vehicle tire with a sealant layer and for recycling a pneumatic vehicle tire with a sealant

The invention relates to an automatically sealing tire sealant and a pneumatic vehicle tire having the sealant and a method for detecting a pneumatic vehicle tire with sealant and a method for recycling a pneumatic vehicle tire with sealant. The sealant according to the invention comprises at least one luminescent agent.

The pneumatic vehicle tire according to the invention has the sealant according to the invention at least on the inner surface opposite the tread.

The tire according to the invention is identified or detected by means of the luminescent agent.

The method of this invention provides a simple and inexpensive method for manufacturing self-sealing pneumatic rubber tires of the tubeless type having a higher degree of uniformity than can be made utilizing conventional manufacturing procedures that are currently being practiced. In the practice of this invention a low viscosity sealant formulation, which would ordinarily be difficult to handle and build into an uncured tire, is encapsulated in a stiff rubber formulation. This makes it relatively easy to build the sealant layer into the tire since the low viscosity sealant formulation is contained with the more rigid solid material. The low viscosity sealant material requires little and preferably no depolymerization to act effectively as a sealant. Accordingly, it does not need to be depolymerized with a peroxide which causes off-gassing and the resultant tire uniformity and balance issues normally associated with polymer break down.