The present invention provides application of a self-healing material in 3D printing. In the present invention, a self-healing material is taken as a 3D printing material, and the material is intelligently detected and spontaneously healed by utilizing a self-healing function of the self-healing material, so that a potential damage to the self-healing material caused by generated micro-cracks can be prevented. Compared with molding conditions of a product, gentle and mild conditions are required for self-healing, and the overall performance of the product cannot be affected from beginning to end of a self-healing process, thereby reducing the maintenance cost of the product, prolonging the service life of the product, and increasing the utilization rate of resources.

The present invention relates to a self-sealing tyre for vehicle wheels comprising at least one carcass ply, a tread band applied in radially outer position to said carcass ply in a crown zone, optionally a liner applied in radially inner position to said carcass ply, a sealing composite applied in radially inner position to the liner and axially extended at least at a part of the crown portion of the tyre; wherein said sealing composite comprises a self-supporting thermoplastic film comprising at least 50% by weight with respect to the weight of the film itself of at least one or more polyolefins, wherein the at least one polyolefin has a fluidity index (MFI) of less than 4 gram per 10 minutes, and a sealing composition layer associated with and supported by said self-supporting thermoplastic film.

The present invention relates to a self-sealing tyre for vehicle wheels comprising at least one carcass ply, a tread band applied in radially outer position to said carcass ply in a crown zone, optionally a liner applied in radially inner position to said carcass ply, a sealing composite applied in radially inner position to the liner and axially extended at least at a part of the crown portion of the tyre; wherein said sealing composite comprises a self-supporting thermoplastic film comprising at least 50% by weight with respect to the weight of the film itself of at least one or more polyolefins, wherein the at least one polyolefin has a fluidity index (MFI) of less than 4 gram per 10 minutes, and a sealing composition layer associated with and supported by said self-supporting thermoplastic film.

A sealant layer assembly which allows a sealant layer to be applied on a tire outside of tire production plants. The assembly comprises a sealant layer to be applied on the surface of an inner liner layer facing the inner cavity of a tire, a net layer arranged on a first surface of the sealant layer, and at least one non-stick protective layer arranged either on a second surface of the sealant layer opposite the first surface or on the net layer.

A sealant layer assembly which allows a sealant layer to be applied on a tire outside of tire production plants. The assembly comprises a sealant layer to be applied on the surface of an inner liner layer facing the inner cavity of a tire, a net layer arranged on a first surface of the sealant layer, and at least one non-stick protective layer arranged either on a second surface of the sealant layer opposite the first surface or on the net layer.

The invention relates to a self-sealing pneumatic vehicle tire having a belt package (2), a tread (1) arranged radially above the belt package (2) and an airtight inner layer (4) arranged radially on the inside, wherein the self-sealing of the pneumatic vehicle tire is obtained via a sealant layer (5) subsequently applied radially on the inside after the vulcanization of the pneumatic vehicle tire, wherein the sealant layer (5) has essentially the width of the belt package (2) and is arranged essentially in the projection thereof and has a cross section which is formed in a cross-sectional plane including the tire axis and has a surface (5a) running essentially parallel to the belt package in axial direction and a surface (5b) running essentially in radial direction.

It is a feature of the invention that at least the surface of the sealant layer (5a) running essentially parallel to the belt package in axial direction has a circumferential coating (6) that contains at least one alkali metal salt of at least one fatty acid and/or at least one alkaline earth metal salt of at least one fatty acid.

A tire sealant layer comprising a rubber portion with an upper surface and a lower surface, and a barrier layer upon the lower surface of the rubber portion is disclosed. The rubber portion comprises a mixture of 100 parts of at least one rubber, 90-500 parts of at least one tackifier, optionally one or more extenders, optionally at least one hydroscopic substance, and a cure package. Also disclosed is a process 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.

A tire sealant layer comprising a rubber portion with an upper surface and a lower surface, and a barrier layer upon the lower surface of the rubber portion is disclosed. The rubber portion comprises a mixture of 100 parts of at least one rubber, 90-500 parts of at least one tackifier, optionally one or more extenders, optionally at least one hydroscopic substance, and a cure package. Also disclosed is a process 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.

The present invention relates to a rubber composition comprising a poly(methacrylic acid) oligomer, a process for preparing the rubber composition, a cured rubber composition, and a self-healing tire prepared by using the rubber composition. The invention further relates to an amphiphilic block copolymer, and a process for its preparation. The amphiphilic block copolymer can be used as compatibilizer in the preparation of the rubber composition.

Provided is a pneumatic tire provided with a self-sealing mechanism in which effective temporary repair is made in puncturing while minimizing an increase in a weight, wherein sealant rubber compositions distinguished by sensitivities to temperature which are different in a cavity side and a tire rubber side are disposed in the sealant layer; and .sub.1/.sub.2 is 1.6 or more; .sub.1 is a viscosity of the sealant rubber composition in the cavity side, and .sub.2 is a viscosity of the sealant rubber composition in the tire rubber side at a shear rate of 1 s.sup.1 and a temperature of 30 C.