METHOD FOR MOLDING AN ELASTOMER THERMOPLASTIC COMPOSITE FOR A TIRE
A process for molding a tire elastomeric thermoplastic composite comprises a stage in which a layer of thermoplastic elastomer (TPE) is applied against one of the faces of the composite, followed by a molding stage for vulcanization of the composite and crosslinking of the layer of thermoplastic elastomer (TPE) with the neighboring layer of rubber material. The process furthermore comprises a stage consisting in applying a nonstick protective layer ( 12 ) against the thermoplastic elastomer (TPE) face intended to be in contact with the mold.
1 .- 22 . (canceled)
23 . A process for the molding of a tire elastomeric composite comprising the steps of:
(i) applying a layer of thermoplastic elastomer to a rubber material of the tire;
(ii) applying a nonstick film to the layer of thermoplastic elastomer; and
(iii) molding an assembly by joint molding and vulcanization of a tire composite elastomer mixture comprising crosslinking agents and an adjacent thermoplastic elastomer layer devoid of crosslinking agents.
24 . The process according to claim 23 further comprising the step of applying a layer of fabrics between the nonstick film and the mold before carrying out the molding step.
25 . The process according to claim 23 , wherein the nonstick film has a melting point of greater than 180° C.
26 . The process according to claim 23 , wherein the nonstick film is selected from the group consisting of fluorinated ethylene propylene, polytetrafluoroethylene and polyamide.
27 . The process according to claim 23 , wherein the thermoplastic elastomer layer is made of styrene/butadiene/styrene or styrene/butadiene/styrene/poly(para-phenylene ether).
28 . The process according to claim 23 , wherein the layer of nonstick film has a thickness of less than or equal to 80 μm.
29 . The process according to claim 28 , wherein the layer of nonstick film has a thickness of less than 50 μm.
30 . A tire tread obtained by the process according to claim 23 .
31 . The tire tread according to claim 30 comprising a layer of thermoplastic elastomer.
32 . The tire tread according to claim 30 comprising a layer of fabrics.
33 . The tire tread according to claim 30 comprising a layer of thermoplastic elastomer and the nonstick film.
34 . The tire tread according to claim 31 , wherein the layer of thermoplastic elastomer comprises a thickness of between 10 μm and 1 mm.
35 . The tire tread according to claim 34 , wherein the layer of thermoplastic elastomer comprises a thickness of between 10 μm and 200 μm.
36 . The tire tread according to claim 35 , wherein the layer of thermoplastic elastomer comprises a thickness of between 10 μm and 80 μm.
37 . The tire tread according to claim 32 , wherein the layer of fabrics has a thickness of between 100 μm and 1 mm.
38 . A tire carcass obtained by the process according to claim 23 .
39 . The tire carcass according to claim 38 comprising a layer of thermoplastic elastomer.
40 . The tire carcass according to claim 38 comprising a layer of fabrics.
41 . The tire carcass according to claim 38 comprising a layer of thermoplastic elastomer and the nonstick film.
42 . The tire carcass according to claim 39 , wherein the layer of thermoplastic elastomer comprises a thickness of between 10 μm and 1 mm.
43 . The tire carcass according to claim 42 , wherein the layer of thermoplastic elastomer comprises a thickness of between 10 μm and 200 μm.
44 . The tire carcass according to claim 43 , wherein the layer of thermoplastic elastomer comprises a thickness of between 10 μm and 80 μm.
45 . The tire carcass according to claim 40 , wherein the layer of fabrics has a thickness of between 100 μm and 1 mm.