Method for molding an elastomer thermoplastic composite for a tire

Patent metadata

Field	Value
Publication number	US-2017144398-A1
Application number	US-201515320592-A
Country	US
Kind code	A1
Filing date	Jun 16, 2015
Priority date	Jun 20, 2014
Publication date	May 25, 2017
Grant date	—

Abstract

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.

First claim

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.

Assignees

• Michelin & Cie
• Michelin Rech Tech

Inventors

• Merino Lopez Jose
• Masse Laurent
• Astier Cedric
• Pan Chinglin

Classifications

• B29K2021/003

  Thermoplastic elastomers · CPC title

• B29K2105/253

  Preform · CPC title

• B29D2030/544

  Applying an intermediate adhesive layer, e.g. cement or cushioning element between carcass and tread · CPC title

• B29D30/54 Primary

  Retreading · CPC title

• B29D2030/548

  Removing the worn out tread from the carcass, e.g. by pulling a continuous wire embedded between tread and carcass · CPC title