WO1993010963A1 - Tyres with plastics tread and method for their manufacturing - Google Patents

Tyres with plastics tread and method for their manufacturing Download PDF

Info

Publication number
WO1993010963A1
WO1993010963A1 PCT/GB1992/002179 GB9202179W WO9310963A1 WO 1993010963 A1 WO1993010963 A1 WO 1993010963A1 GB 9202179 W GB9202179 W GB 9202179W WO 9310963 A1 WO9310963 A1 WO 9310963A1
Authority
WO
WIPO (PCT)
Prior art keywords
tread
rubber
tyre
strip
polyurethane
Prior art date
Application number
PCT/GB1992/002179
Other languages
French (fr)
Inventor
Brian John Lawton
Original Assignee
Colway Tyres Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Colway Tyres Limited filed Critical Colway Tyres Limited
Publication of WO1993010963A1 publication Critical patent/WO1993010963A1/en
Priority to GB9314937A priority Critical patent/GB2274815A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
    • B29D30/54—Retreading
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B60C1/0016—Compositions of the tread
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts

Definitions

  • This invention concerns improvements in or relating to tyres, and to a method of making tyres.
  • a tyre comprising a rubber and material body, and a plastics material tread bonded to the body.
  • the tread is preferably formed substantially from polyurethane . Rubber may be included in the tread and the rubber may be provided in the form of rubber crumb.
  • Rubber crumb is obtained during retreading of tyres and other processes involving rubber products.
  • the tyre body may have been obtained from a previously used tyre, and the plastics material tread added during retreading. Alternatively, the body and tread may have been bonded together during manufacture of a new tyre.
  • the body and tread are preferably bonded together by a strip of rubber which is vulcanised between the body and tread thereby forming a bond therebetween.
  • the ⁇ strip is preferably formed of natural rubber and is desirably between 1 and 1.5mm thick.
  • the present invention also provides a method of making a tyre, the method comprising bonding a rubber and material body to a plastics material tread by locating a strip of unvulcanised rubber therebetween and applying heat and pressure to vulcanise the strip thereby providing a bond between the body and tread.
  • the tread is preferably formed substantially of polyurethane, and the strip is preferably natural rubber.
  • the tread is preferably formed in a mould from liquid polyurethane. Rubber crumb is preferably added to the polyurethane prior to moulding.
  • the body may be obtained from a previously used tyre and the plastics material tread applied during retreading.
  • the body is preferably prepared prior to bonding by sanding and/or buffing.
  • a bonding agent is preferably applied to the tread and/or body and allowed to dry prior to locating the rubber strip between body and tread.
  • a tyre and a method of making same which provides a tyre with the advantages of a rubber body and also the advantages of hard wearing polyurethane as a tread.
  • the polyurethane tread provides increased resistance to oil, chemicals, ageing; and cutting, tearing or penetration by stones or other objects, relative to a conventional rubber tread. Traction and/or skid properties can be enhanced in the tread by a siping process subsequent to manufacture of the tread.
  • rubber crumb may be added to the polyurethane to enhance the grip and/or skid properties of the tread, and other materials may be added as is appropriate.
  • the above tyre permits conventional tyre manufacturing machinery and techniques to be used thereby not incurring extra costs.
  • the rubber strip may be vulcanised in an autoclave as is conventional.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

A tyre comprising a rubber and material body which may have previously been used, and a polyurethane tread bonded thereto. The body and tread are bonded together by locating a strip of natural rubber therebetween and applying heat and pressure to vulcanise the strip of rubber to form a bond.

Description

TYRES WITH PLASTIC~TREAD AND METHOD FOR THEIR MANUFACTURING
This invention concerns improvements in or relating to tyres, and to a method of making tyres.
% According to the present invention there is provided a tyre comprising a rubber and material body, and a plastics material tread bonded to the body.
The tread is preferably formed substantially from polyurethane . Rubber may be included in the tread and the rubber may be provided in the form of rubber crumb.
Rubber crumb is obtained during retreading of tyres and other processes involving rubber products.
The tyre body may have been obtained from a previously used tyre, and the plastics material tread added during retreading. Alternatively, the body and tread may have been bonded together during manufacture of a new tyre.
The body and tread are preferably bonded together by a strip of rubber which is vulcanised between the body and tread thereby forming a bond therebetween. The ^ strip is preferably formed of natural rubber and is desirably between 1 and 1.5mm thick.
The present invention also provides a method of making a tyre, the method comprising bonding a rubber and material body to a plastics material tread by locating a strip of unvulcanised rubber therebetween and applying heat and pressure to vulcanise the strip thereby providing a bond between the body and tread.
The tread is preferably formed substantially of polyurethane, and the strip is preferably natural rubber.
The tread is preferably formed in a mould from liquid polyurethane. Rubber crumb is preferably added to the polyurethane prior to moulding. The body may be obtained from a previously used tyre and the plastics material tread applied during retreading.
The body is preferably prepared prior to bonding by sanding and/or buffing. A bonding agent is preferably applied to the tread and/or body and allowed to dry prior to locating the rubber strip between body and tread.
There is thus described a tyre and a method of making same which provides a tyre with the advantages of a rubber body and also the advantages of hard wearing polyurethane as a tread. The polyurethane tread provides increased resistance to oil, chemicals, ageing; and cutting, tearing or penetration by stones or other objects, relative to a conventional rubber tread. Traction and/or skid properties can be enhanced in the tread by a siping process subsequent to manufacture of the tread. As noted above rubber crumb may be added to the polyurethane to enhance the grip and/or skid properties of the tread, and other materials may be added as is appropriate. The above tyre permits conventional tyre manufacturing machinery and techniques to be used thereby not incurring extra costs. The rubber strip may be vulcanised in an autoclave as is conventional.
It is to be realised that the above features are described by way of example only and different materials and/or manufacturing steps could be used without departing from the scope of the invention.
Whilst endeavouring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.

Claims

Claims :
1. A tyre comprising a rubber and material body, characterised in that a plastics material tread is bonded to the body.
2. A tyre according to claim 1, characterised in that the tread is formed substantially from polyurethane.
3. A tyre according to claims 1 or 2, characterised in that rubber is included in the tread.
4. A tyre according to claim 3, characterised in that the rubber is provided in the form of rubber crumb.
5. A tyre according to any of the preceding claims, characterised in that the tyre body has been obtained from a previously used tyre, and the plastics material tread added during retreading.
6. A tyre according to any of claims 1 to 4, characterised in that the body and tread have been bonded together during manufacture of a new tyre.
7. A tyre according to any of the preceding claims, characterised in that the body and tread are bonded together by a strip of rubber which is vulcanised between the body and tread thereby forming a bond therebetween.
8. A tyre according to claim 7, characterised in that the rubber strip is formed of natural rubber.
9. A tyre according to claims 7 or 8, characterised in that the rubber strip is between 1 and 1.5mm thick.
10. A method of making a tyre, the method comprising bonding a rubber and material body to a plastics material tread by locating a strip of unvulcanised rubber therebetween and applying heat and pressure to vulcanise the strip thereby providing a bond between the body and tread.
11. A method according to claim 10, characterised in that the tread is formed substantially of polyurethane.
12. A method according to claim 11, characterised in that the tread is formed in a mould from liquid polyurethane.
13. A method according according to claim 12, characterised in that rubber crumb is added to the polyurethane prior to moulding.
14. A method according to any of claims 10 to 13, characterised in that the strip is formed substantially of natural rubber.
15. A method according to any of claims 10 to 14, characterised in that the body is obtained from a previously used tyre and the plastics material tread is applied during retreading.
16. A method according to any of the preceding claims, characterised in that the body is prepared prior to bonding by sanding and/or buffing.
17. A method according to any of the preceding claims, characterised in that bonding agent is applied to the tread and/or body and allowed to dry prior to locating the rubber strip between the body and tread.
PCT/GB1992/002179 1991-11-26 1992-11-25 Tyres with plastics tread and method for their manufacturing WO1993010963A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9314937A GB2274815A (en) 1991-11-26 1993-07-19 Tyres with plastics tread and method for their manufacturing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919125231A GB9125231D0 (en) 1991-11-26 1991-11-26 Improved tyres
GB9125231.2 1991-11-26

Publications (1)

Publication Number Publication Date
WO1993010963A1 true WO1993010963A1 (en) 1993-06-10

Family

ID=10705329

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/002179 WO1993010963A1 (en) 1991-11-26 1992-11-25 Tyres with plastics tread and method for their manufacturing

Country Status (3)

Country Link
AU (1) AU2951692A (en)
GB (2) GB9125231D0 (en)
WO (1) WO1993010963A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2270888A (en) * 1992-09-23 1994-03-30 Compounding Ingredients Limite Tyre tread

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1056414A (en) * 1963-03-12 1967-01-25 Montedison Spa Manufacture and retreading of tyres
FR2073906A5 (en) * 1969-12-17 1971-10-01 Mitsui Petrochemical Ind
US4104265A (en) * 1975-01-30 1978-08-01 Compagnie Generale Des Etablissements Michelin Vulcanization process for preparation of polyurethane tires
GB1557110A (en) * 1976-11-18 1979-12-05 Lensmar Ab Jan Body containing binding agent and vulcanized rubber
GB2039232A (en) * 1978-12-14 1980-08-06 Synair Corp Method of bonding urethane formulations to rubber
US4267079A (en) * 1979-11-13 1981-05-12 The Firestone Tire & Rubber Company Cured rubber skim compositions exhibiting better humidity aged metal adhesion and metal adhesion retention
US4343339A (en) * 1978-09-06 1982-08-10 Bayer Aktiengesellschaft Process for the production of tires comprising vulcanized elastomers containing urethane groups
DE3124912A1 (en) * 1981-06-25 1983-01-13 Paul 4600 Dortmund Rösler Process for retreading tyres and tyres produced according to the process
DE3416690A1 (en) * 1984-05-05 1986-01-02 Bandag Inc., Muscatine, Ia. Tread strip for retreading vehicle tyres and production process therefor
EP0209512A2 (en) * 1985-06-19 1987-01-21 LIM Kunststoff-Technologie Gesellschaft m.b.H. Laminates, in particular car tyres, and process and coupling agent for their preparation
US4770741A (en) * 1983-11-22 1988-09-13 Day Holdings (Proprietary) Ltd. Accessory for a tire tread builder
US4909873A (en) * 1988-10-03 1990-03-20 Detwiler Richard H Method of splicing adjacent ends of precured tread material when retreading tires therewith

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1056414A (en) * 1963-03-12 1967-01-25 Montedison Spa Manufacture and retreading of tyres
FR2073906A5 (en) * 1969-12-17 1971-10-01 Mitsui Petrochemical Ind
US4104265A (en) * 1975-01-30 1978-08-01 Compagnie Generale Des Etablissements Michelin Vulcanization process for preparation of polyurethane tires
GB1557110A (en) * 1976-11-18 1979-12-05 Lensmar Ab Jan Body containing binding agent and vulcanized rubber
US4343339A (en) * 1978-09-06 1982-08-10 Bayer Aktiengesellschaft Process for the production of tires comprising vulcanized elastomers containing urethane groups
GB2039232A (en) * 1978-12-14 1980-08-06 Synair Corp Method of bonding urethane formulations to rubber
US4267079A (en) * 1979-11-13 1981-05-12 The Firestone Tire & Rubber Company Cured rubber skim compositions exhibiting better humidity aged metal adhesion and metal adhesion retention
DE3124912A1 (en) * 1981-06-25 1983-01-13 Paul 4600 Dortmund Rösler Process for retreading tyres and tyres produced according to the process
US4770741A (en) * 1983-11-22 1988-09-13 Day Holdings (Proprietary) Ltd. Accessory for a tire tread builder
DE3416690A1 (en) * 1984-05-05 1986-01-02 Bandag Inc., Muscatine, Ia. Tread strip for retreading vehicle tyres and production process therefor
EP0209512A2 (en) * 1985-06-19 1987-01-21 LIM Kunststoff-Technologie Gesellschaft m.b.H. Laminates, in particular car tyres, and process and coupling agent for their preparation
US4909873A (en) * 1988-10-03 1990-03-20 Detwiler Richard H Method of splicing adjacent ends of precured tread material when retreading tires therewith

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2270888A (en) * 1992-09-23 1994-03-30 Compounding Ingredients Limite Tyre tread
GB2270888B (en) * 1992-09-23 1995-07-19 Compounding Ingredients Limite Tyre tread

Also Published As

Publication number Publication date
GB9314937D0 (en) 1994-05-11
GB9125231D0 (en) 1992-01-29
AU2951692A (en) 1993-06-28
GB2274815A (en) 1994-08-10

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