A pneumatic tire is disclosed comprising a generally toroidal-shaped supporting carcass (4) with an outer circumferential tread (8), two spaced beads (5), at least one ply extending from bead to bead, sidewalls (3) extending radially from and connecting said tread (8) to said beads (5), a sealant layer (7, 17, 27) which is disposed inwardly from the supporting carcass (4), and an innerliner (6, 16, 26) which is disposed inwardly from the sealant layer (7, 17, 27). The sealant layer (7, 17, 27) comprises a sealant composition comprising polyisobutylene or butyl rubber. The polyisobutylene or butyl rubber has a weight average molecular weight which is within the range of from 30,000 to 120,000. Also, a method of manufacturing a pneumatic rubber tire having a puncture sealing feature is disclosed. The method comprises building an unvulcanized tire with said sealant layer (7, 17, 27) wherein the sealant formulation is extruded as said sealant layer (7, 17, 27) onto the unvulcanized supporting carcass (4).
SELF SEALING TIRE AND METHOD OF MANUFACTURING
SELBSTDICHTENDER REIFEN UND VERFAHREN ZUM HERSTELLEN
PNEUMATIQUE AUTO-OBTURANT ET PROCÉDÉ DE FABRICATION
2022-12-28
Patent
Electronic Resource
English
Self-sealing composition, self-sealing tire, and method for manufacturing self-sealing tire
European Patent Office | 2023
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