Film to keep tire surface clean and simultaneously prime for better adhesion of balance pad

• US 8,776,851 B2
• Filed: 08/29/2008
• Issued: 07/15/2014
• Est. Priority Date: 08/29/2008
• Status: Expired due to Fees

• Current Assignee: Goodyear Tire & Rubber Company
• Original Assignee: Goodyear Tire & Rubber Company
• Inventors: Majumdar, Ramendra Nath
• Primary Examiner(s): Knable, Geoffrey L
• Application Number:
  US12/201,072
• Publication Number:
  US 20100051156A1
• Time in Patent Office: 2,146 Days
• Field of Search: 156/123, 156/510, 156/133, 156/130.5, 156/110.1, 156/73.6, 156/90, 156/524, 156/525, 156/111, 156414-417, 156/75, 152/510, 152/450, 152/157, 152/317, 152/519, 152/154.1
• US Class Current: 152/510
• CPC Class Codes: B29D 2030/0077 Directly attaching monitoring devices to tyres before or after vulcanization, e.g. microchips
• CPC Class Codes: B29D 2030/0637 Correcting by adding material
• CPC Class Codes: B29D 30/0061 Accessories, details or auxiliary operations not otherwise provided for
• CPC Class Codes: B29D 30/0633 After-treatment specially adapted for vulcanising tyres
• CPC Class Codes: B29D 30/0662 Accessories, details or auxiliary operations
• CPC Class Codes: B32B 1/00 Layered products having a non-planar shape
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2274/00 Thermoplastic elastomer material
• CPC Class Codes: B32B 2307/306 Resistant to heat
• CPC Class Codes: B32B 2307/50 having particular mechanical properties
• CPC Class Codes: B32B 2307/514 Oriented
• CPC Class Codes: B32B 2307/54 Yield strength; Tensile strength
• CPC Class Codes: B32B 2307/5825 Tear resistant
• CPC Class Codes: B32B 2307/718 Weight, e.g. weight per square meter
• CPC Class Codes: B32B 2307/7242 Non-permeable
• CPC Class Codes: B32B 25/042 of natural rubber or synthetic rubber
• CPC Class Codes: B32B 25/08 of synthetic resin
• CPC Class Codes: B32B 25/10 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 25/12 comprising natural rubber
• CPC Class Codes: B32B 25/18 : comprising butyl or halobutyl rubber
• CPC Class Codes: B32B 2605/00 : Vehicles
• CPC Class Codes: B32B 2605/18 : Aircraft
• CPC Class Codes: B32B 27/12 : next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/18 : characterised by the use of special additives
• CPC Class Codes: B32B 27/22 : using plasticisers
• CPC Class Codes: B32B 27/34 : comprising polyamides
• CPC Class Codes: B32B 3/02 : characterised by features of form at particular places, e.g. in edge regions non-uniform thickness B32B3/263
• CPC Class Codes: B32B 5/022 : Non-woven fabric
• CPC Class Codes: B32B 5/12 : characterised by the relative arrangement of fibres or filaments of different layers, e.g. the fibres or filaments being parallel or perpendicular to each other
• CPC Class Codes: B32B 5/22 : characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed layer formed of natural mineral fibres or particles next to a foam layer B32B19/047, next to a layer made of particles B32B19/048, or next to a fibrous or filamentary layer B32B19/06; paper layer or cardboard layer next to a paper layer or cardboard layer B32B29/005, next to a foam layer B32B29/007, next to a fibrous or filamentary layer B32B29/02, or next to a particulate layer B32B29/04
• CPC Class Codes: B32B 5/26 : another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: B32B 7/06 : permitting easy separation
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B60C 1/0008 : Compositions of the inner liner
• CPC Class Codes: B60C 19/003 : Balancing means attached to the tyre
• CPC Class Codes: B60C 2005/145 : made of laminated layers
• CPC Class Codes: B60C 5/14 : with impervious liner or coating on the inner wall of the tyre
• CPC Class Codes: C08L 23/22 : Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
• CPC Class Codes: C08L 2666/20 : Macromolecular compounds having nitrogen in the main chain according to C08L75/00 - C08L79/00; Derivatives thereof
• CPC Class Codes: C08L 77/00 : Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: Y10T 152/10495 : Pneumatic tire or inner tube
• CPC Class Codes: Y10T 428/266 : of base or substrate
• CPC Class Codes: Y10T 428/2839 : with release or antistick coating

Abstract

A method of preparing a tire inner surface includes providing an uncured tire having an inner surface, placing a strip of multi-axially stretchable blend film on a circumferential surface of the inner surface, wherein one end of the overlapped splice joined by a pressure-sensitive adhesive for easy removal of the strip from the inner surface, applying a release agent coating to the annular, circumferential film strip and the inner surface of the uncured tire, shaping and curing the uncured tire with the release coating on the annular circumferential film strip and inner surface in a suitable mold at an elevated temperature, removing the cured tire from the mold and allowing the cured tire to cool, and removing the annular circumferential film strip with its release coating by use of a film strip to provide a circumferential release coating-free tire inner surface of the cured tire for adhering balance pads, puncture sealants, and noise reduction foams.

Claims

1. A tire carcass comprising:

a circumferential tread;

at least one ply;

at least two spaced-apart beads;

sidewall portions extending between the tread and the beads;

an innerliner, wherein the innerliner lines an inner surface of the at least one ply; and

,

a removable barrier film, wherein the removable barrier film is removable in one piece and positioned along a longitudinal axis of the at least one ply, wherein the removable barrier film is a blend of a rubber and a plasticized nylon, wherein the rubber is selected from the group consisting of natural rubber and butyl rubber, wherein the film is narrower than the innerliner, and wherein one end of the film overlays the other end of the film to provide an overlapping portion with the two ends of the film being secured together with a pressure sensitive adhesive.

2. The tire carcass of claim 1, wherein the film has a thickness of between about 50 microns and about 510 microns, a 50% modulus of between about 9 MPa and 28 MP, a tensile strength of between about 17 MPa and 41 MPa, wherein the film is comprised of approximately between 30% by weight and approximately 70% by weight rubber and approximately between 30% by weight and approximately 70% by weight nylon.

3. The tire carcass of claim 1, wherein the film is a carbon black free extruded film.

4. The tire carcass of claim 2, wherein the film has a pull-tab for removal of the film from the innerliner.

5. The tire carcass of claim 1, wherein the removable barrier film is superimposed on at least a portion of the innerliner.

6. The tire carcass of claim 5, wherein the removable barrier film is superimposed on the surface of the innerliner, wherein the blend film is a combination of butyl rubber, nylon, and N-butylbenzene sulfonamide.

7. The tire carcass of claim 5, wherein ingredients from the removable barrier film migrate from the removable barrier film to the innerliner and remain with the innerliner after the removable barrier film is removed.

8. The tire carcass of claim 7, wherein the migration of ingredients improves the adhesion characteristics of the innerliner to an associated insert attached to the innerliner after the removable barrier film is removed.

9. The tire carcass of claim 7, wherein the migration of ingredients makes the removable barrier film stronger and facilitates easy removal of the removable barrier film.

10. The tire carcass of claim 1, wherein the film is a combination of butyl rubber, nylon, and N-butylbenzene sulfonamide.

11. The tire carcass of claim 1 wherein the nylon is nylon 6.

12. The tire carcass of claim 1 wherein the nylon is nylon 6,6.

13. The tire carcass of claim 1 wherein the nylon is nylon 12.

14. The tire carcass of claim 1 wherein the rubber is natural rubber.

15. The tire carcass of claim 1 wherein the rubber is butyl rubber.