GB2116476A - Polyolefin/polyester laminates - Google Patents

Polyolefin/polyester laminates Download PDF

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Publication number
GB2116476A
GB2116476A GB08206274A GB8206274A GB2116476A GB 2116476 A GB2116476 A GB 2116476A GB 08206274 A GB08206274 A GB 08206274A GB 8206274 A GB8206274 A GB 8206274A GB 2116476 A GB2116476 A GB 2116476A
Authority
GB
United Kingdom
Prior art keywords
polyolefin
pipe
polyester
mat
polyester resin
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB08206274A
Other versions
GB2116476B (en
Inventor
George William Tomkinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB08206274A priority Critical patent/GB2116476B/en
Publication of GB2116476A publication Critical patent/GB2116476A/en
Application granted granted Critical
Publication of GB2116476B publication Critical patent/GB2116476B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
    • C08J5/121—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

Polyolefin/polyester laminates are produced by fusing a porous web or mat, e.g. of glass or polyester fibre, which is impregnable by polyester resins, to the surface of the polyolefin substrate, then applying an unsaturated polyester resin to the fused web or mat and curing the polyester resin in in situ.

Description

dicarboxylic acid such as maleic or fumaric acid, and a glycol, dissolved in a cross-linking monomer, e.g. styrene.
The porous web or mat fused to the surface of the polyolefin may be of any suitable material compatible with the polyolefin, and may itself be a woven or non-woven fabric of polyolefin or polyester fibres, or a woven or non-woven web or mat of glass fibres.
In fusing the porous web or mat to the polyolefin surface, the polyolefin surface may be heated to a temperature above its softening point in any suitable way, for example, by hot airjets, or flame jets or by exposure to a high intensity electric radiation source. In a particular technique envisaged for reinforcing thermoplastics pipe, the pipe is fed through an annular gas jet flame to cause fusion of the surface of the pipe; whilst the surface of the pipe is still soft, the pipe is helically wrapped with the porous reinforcement in the form of a strip or tape which is wound around the pipe as it advances through the flame. If desired, the porous web can be further pressed into the fused layer by appropriately placed rollers to ensure the complete fusion of the porous web to the pipe surface.Other methods of fusing the porous web to the surface of the polyolefin, will be apparent to those skilled in the art.
Claims (Filed 23 Feb 83) 1. A method of forming polyolefin/polyester laminates comprising a thermoplastic polyolefin substrate having a layer of thermoset polyester resin bonded thereto, which comprises fusing to the surface of the polyolefin substrate a porous web or mat of material compatible with the polyolefin and impregnable by the polyester resin, applying over the fused web a layer of polymerisable unsaturated polyester resin, and curing the layer of unsaturated polyester resin in situ.
2. A method according to claim 1 , which comprises additionally laying over the fused web one or more layers of fibrous reinforcements and impregnating said reinforcements with said uncured polyester resin.
3. A method according to claim 2, in which said fibrous reinforcement comprises glass fibre.
4. A method according to claim 1, 2 or 3 wherein the porous web or mat fused to the surface of the polyolefin substrate is a woven or non-woven fabric of glass or polyester fibres.
5. A method according to any one of claims 1-4, wherein the porous web or mat is fused to the surface of the polyolefin substrate by heating the surface of the substrate to above its softening point and pressing the web or mat into the softened surface.
6. A method according to any one of claims 1-5, wherein the substrate is a thermoplastics pipe.
7. A method according to claim 6, which comprises feeding the substrate pipe axially through an annular gas jet flame, thereby to SPECIFICATION Polyolefin/polyester laminates This invention relates to polyolefin/polyester laminates, and more particularly to a method of reinforcing the bond between a thermoplastic polyolefin substrate and a thermoset layer of polyester, e.g. glass fibre reinforced polyester (GRP).
Thermoplastic pipes, e.g. of polyethylene, polypropylene, polyvinyl chloride and other polyolefins, are widely used in the chemical industry, in the building industry and in many other technical fields. Such thermoplastic pipes, however, lack certain properties, for example, rigidity and high strength, particularly at elevated temperatures and pressures and it would be desirable to combine the chemical inertness and toughness of the polyolefin with the rigidity and strength of polyester, particularly GRP.
Unfortunately a satisfactory method of bonding GRP to a polyolefin substrate is not available.
Attempts to apply layers of polyester, e.g. GRP to polyolefin pipe merely succeed in building up a shell around the pipe with little or no bonding between the two, even if the surface of the polyolefin pipe is roughened.
In accordance with this invention, I provide a method of bonding polyester resin, e.g. GRP, to a thermoplastic polyolefin substrate, which comprises fusing a porous web or mat of a material compatible with the polyolefin to the surface of the polyolefin substrate, and applying the uncured polyester resin composition to the porous web or mat fused to the surface of the polyolefin substrate, whereby the resin, or a proportion thereof, penetrates the pores thereof to be cured in situ therein.Usually, but not necessarily, one or more layers of fibrous reinforcement, e.g. glass fibre, will additionally be superimposed on the bonded porous layer and impregnated with the polyester resin composition to build up the laminated structure consisting essentially of the polyolefin substrate, an overlying polyester resin layer, and sandwiched between the tow an intermeduute layer comprising the porous web or mat fused to the surface of the polyolefin and impregnated with the resin. Usually the polyester resin used to impregnate the fused porous web will be the same as that used to build up the overlying polyester layer, but not necessarily so provided that the two resins are compatible.
As already indicated the invention may be applied to a wide range of thermoplastic polyolefins, e.g. polyethylene, polyvinyl chloride, polypropylene, etc., and may be applied to a wide range of physical forms, including, pipes and pipe fittings, thermoplastic vessels of all shapes and sizes and sheet-form thermoplastics. As the polyester resin component there may be used any suitable thermosetting polyester resin composition, such compositions usually containing an unsaturated polyester component e.g. the condensate of an a,P-unsaturated
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. dicarboxylic acid such as maleic or fumaric acid, and a glycol, dissolved in a cross-linking monomer, e.g. styrene. The porous web or mat fused to the surface of the polyolefin may be of any suitable material compatible with the polyolefin, and may itself be a woven or non-woven fabric of polyolefin or polyester fibres, or a woven or non-woven web or mat of glass fibres. In fusing the porous web or mat to the polyolefin surface, the polyolefin surface may be heated to a temperature above its softening point in any suitable way, for example, by hot airjets, or flame jets or by exposure to a high intensity electric radiation source. In a particular technique envisaged for reinforcing thermoplastics pipe, the pipe is fed through an annular gas jet flame to cause fusion of the surface of the pipe; whilst the surface of the pipe is still soft, the pipe is helically wrapped with the porous reinforcement in the form of a strip or tape which is wound around the pipe as it advances through the flame. If desired, the porous web can be further pressed into the fused layer by appropriately placed rollers to ensure the complete fusion of the porous web to the pipe surface.Other methods of fusing the porous web to the surface of the polyolefin, will be apparent to those skilled in the art. Claims (Filed 23 Feb 83)
1. A method of forming polyolefin/polyester laminates comprising a thermoplastic polyolefin substrate having a layer of thermoset polyester resin bonded thereto, which comprises fusing to the surface of the polyolefin substrate a porous web or mat of material compatible with the polyolefin and impregnable by the polyester resin, applying over the fused web a layer of polymerisable unsaturated polyester resin, and curing the layer of unsaturated polyester resin in situ.
2. A method according to claim 1 , which comprises additionally laying over the fused web one or more layers of fibrous reinforcements and impregnating said reinforcements with said uncured polyester resin.
3. A method according to claim 2, in which said fibrous reinforcement comprises glass fibre.
4. A method according to claim 1, 2 or 3 wherein the porous web or mat fused to the surface of the polyolefin substrate is a woven or non-woven fabric of glass or polyester fibres.
5. A method according to any one of claims 1-4, wherein the porous web or mat is fused to the surface of the polyolefin substrate by heating the surface of the substrate to above its softening point and pressing the web or mat into the softened surface.
6. A method according to any one of claims 1-5, wherein the substrate is a thermoplastics pipe.
7. A method according to claim 6, which comprises feeding the substrate pipe axially through an annular gas jet flame, thereby to SPECIFICATION Polyolefin/polyester laminates This invention relates to polyolefin/polyester laminates, and more particularly to a method of reinforcing the bond between a thermoplastic polyolefin substrate and a thermoset layer of polyester, e.g. glass fibre reinforced polyester (GRP).
Thermoplastic pipes, e.g. of polyethylene, polypropylene, polyvinyl chloride and other polyolefins, are widely used in the chemical industry, in the building industry and in many other technical fields. Such thermoplastic pipes, however, lack certain properties, for example, rigidity and high strength, particularly at elevated temperatures and pressures and it would be desirable to combine the chemical inertness and toughness of the polyolefin with the rigidity and strength of polyester, particularly GRP.
Unfortunately a satisfactory method of bonding GRP to a polyolefin substrate is not available.
Attempts to apply layers of polyester, e.g. GRP to polyolefin pipe merely succeed in building up a shell around the pipe with little or no bonding between the two, even if the surface of the polyolefin pipe is roughened.
In accordance with this invention, I provide a method of bonding polyester resin, e.g. GRP, to a thermoplastic polyolefin substrate, which comprises fusing a porous web or mat of a material compatible with the polyolefin to the surface of the polyolefin substrate, and applying the uncured polyester resin composition to the porous web or mat fused to the surface of the polyolefin substrate, whereby the resin, or a proportion thereof, penetrates the pores thereof to be cured in situ therein.Usually, but not necessarily, one or more layers of fibrous reinforcement, e.g. glass fibre, will additionally be superimposed on the bonded porous layer and impregnated with the polyester resin composition to build up the laminated structure consisting essentially of the polyolefin substrate, an overlying polyester resin layer, and sandwiched between the tow an intermeduute layer comprising the porous web or mat fused to the surface of the polyolefin and impregnated with the resin. Usually the polyester resin used to impregnate the fused porous web will be the same as that used to build up the overlying polyester layer, but not necessarily so provided that the two resins are compatible.
As already indicated the invention may be applied to a wide range of thermoplastic polyolefins, e.g. polyethylene, polyvinyl chloride, polypropylene, etc., and may be applied to a wide range of physical forms, including, pipes and pipe fittings, thermoplastic vessels of all shapes and sizes and sheet-form thermoplastics. As the polyester resin component there may be used any suitable thermosetting polyester resin composition, such compositions usually containing an unsaturated polyester component e.g. the condensate of an a,P-unsaturated soften the external surface of the pipe, and helically winding said porous web around the softened surface of the pipe as it emerges from said flame.
GB08206274A 1982-03-03 1982-03-03 Polyolefin/polyester laminates Expired GB2116476B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08206274A GB2116476B (en) 1982-03-03 1982-03-03 Polyolefin/polyester laminates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08206274A GB2116476B (en) 1982-03-03 1982-03-03 Polyolefin/polyester laminates

Publications (2)

Publication Number Publication Date
GB2116476A true GB2116476A (en) 1983-09-28
GB2116476B GB2116476B (en) 1985-09-11

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0509480A1 (en) * 1991-04-18 1992-10-21 Kuraray Co., Ltd. Laminated tube
EP0586729A1 (en) * 1991-06-25 1994-03-16 Holger Knappe Plastic laminates made from thermoplastics and unsaturated polyester resins or epoxy resins
WO1995035339A1 (en) * 1994-06-17 1995-12-28 Atomic Energy Corporation Of South Africa Limited Process for the production of plastic components for containing and/or transporting fluids
US5792528A (en) * 1994-06-17 1998-08-11 Atomic Energy Corporation Of South Africa Limited Process for the production of plastic components for containing and/or transporting fluids
WO1999023370A1 (en) * 1997-11-03 1999-05-14 Saffil Limited Composite mat
DE102004029174A1 (en) * 2004-06-16 2006-01-12 Kruk Kunststoffe Gmbh Body (molded body of plastic e.g. a plate, a basin, garden pond and container) comprises a foil (plastic- or rubber foil) arranged on a side of the body with a coupling agent layer arranged on a foil
US8679415B2 (en) 2009-08-10 2014-03-25 Unifrax I Llc Variable basis weight mounting mat or pre-form and exhaust gas treatment device
US8734726B2 (en) 2009-12-17 2014-05-27 Unifrax I Llc Multilayer mounting mat for pollution control devices
US8765069B2 (en) 2010-08-12 2014-07-01 Unifrax I Llc Exhaust gas treatment device
US8926911B2 (en) 2009-12-17 2015-01-06 Unifax I LLC Use of microspheres in an exhaust gas treatment device mounting mat
US9120703B2 (en) 2010-11-11 2015-09-01 Unifrax I Llc Mounting mat and exhaust gas treatment device
US9631529B2 (en) 2009-04-21 2017-04-25 Saffil Automotive Limited Erosion resistant mounting mats
US9650935B2 (en) 2009-12-01 2017-05-16 Saffil Automotive Limited Mounting mat
US9816420B2 (en) 2009-12-17 2017-11-14 Unifrax I Llc Mounting mat for exhaust gas treatment device
US9924564B2 (en) 2010-11-11 2018-03-20 Unifrax I Llc Heated mat and exhaust gas treatment device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1406610A (en) * 1971-12-10 1975-09-17 Ici Ltd Continuous production of shaped polymeric articles
GB1604872A (en) * 1978-03-29 1981-12-16 Rohm & Haas Reinforcing a layer of plastics material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1406610A (en) * 1971-12-10 1975-09-17 Ici Ltd Continuous production of shaped polymeric articles
GB1604872A (en) * 1978-03-29 1981-12-16 Rohm & Haas Reinforcing a layer of plastics material

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324558A (en) * 1991-04-18 1994-06-28 Kuraray Co., Ltd. Laminated tube
EP0509480A1 (en) * 1991-04-18 1992-10-21 Kuraray Co., Ltd. Laminated tube
EP0586729A1 (en) * 1991-06-25 1994-03-16 Holger Knappe Plastic laminates made from thermoplastics and unsaturated polyester resins or epoxy resins
US6238757B1 (en) 1991-06-25 2001-05-29 Holger Knappe Thermoplastic- and UP- or EP-based laminate plastics
WO1995035339A1 (en) * 1994-06-17 1995-12-28 Atomic Energy Corporation Of South Africa Limited Process for the production of plastic components for containing and/or transporting fluids
US5792528A (en) * 1994-06-17 1998-08-11 Atomic Energy Corporation Of South Africa Limited Process for the production of plastic components for containing and/or transporting fluids
WO1999023370A1 (en) * 1997-11-03 1999-05-14 Saffil Limited Composite mat
DE102004029174A1 (en) * 2004-06-16 2006-01-12 Kruk Kunststoffe Gmbh Body (molded body of plastic e.g. a plate, a basin, garden pond and container) comprises a foil (plastic- or rubber foil) arranged on a side of the body with a coupling agent layer arranged on a foil
US9631529B2 (en) 2009-04-21 2017-04-25 Saffil Automotive Limited Erosion resistant mounting mats
US8679415B2 (en) 2009-08-10 2014-03-25 Unifrax I Llc Variable basis weight mounting mat or pre-form and exhaust gas treatment device
US9650935B2 (en) 2009-12-01 2017-05-16 Saffil Automotive Limited Mounting mat
US8926911B2 (en) 2009-12-17 2015-01-06 Unifax I LLC Use of microspheres in an exhaust gas treatment device mounting mat
US8734726B2 (en) 2009-12-17 2014-05-27 Unifrax I Llc Multilayer mounting mat for pollution control devices
US9816420B2 (en) 2009-12-17 2017-11-14 Unifrax I Llc Mounting mat for exhaust gas treatment device
US8765069B2 (en) 2010-08-12 2014-07-01 Unifrax I Llc Exhaust gas treatment device
US8992846B2 (en) 2010-08-12 2015-03-31 Unifrax I Llc Exhaust gas treatment device
US9120703B2 (en) 2010-11-11 2015-09-01 Unifrax I Llc Mounting mat and exhaust gas treatment device
US9924564B2 (en) 2010-11-11 2018-03-20 Unifrax I Llc Heated mat and exhaust gas treatment device

Also Published As

Publication number Publication date
GB2116476B (en) 1985-09-11

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