GB2289436A - Curable plastic sheet material - Google Patents

Curable plastic sheet material Download PDF

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Publication number
GB2289436A
GB2289436A GB9509992A GB9509992A GB2289436A GB 2289436 A GB2289436 A GB 2289436A GB 9509992 A GB9509992 A GB 9509992A GB 9509992 A GB9509992 A GB 9509992A GB 2289436 A GB2289436 A GB 2289436A
Authority
GB
United Kingdom
Prior art keywords
sheet material
layer
barrier
flexible sheet
radiation
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.)
Withdrawn
Application number
GB9509992A
Other versions
GB9509992D0 (en
Inventor
Desmond Charles Dunne
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.)
GARRARD EUROP Ltd
Original Assignee
GARRARD EUROP Ltd
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 GARRARD EUROP Ltd filed Critical GARRARD EUROP Ltd
Publication of GB9509992D0 publication Critical patent/GB9509992D0/en
Publication of GB2289436A publication Critical patent/GB2289436A/en
Withdrawn legal-status Critical Current

Links

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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • B32B27/12—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
    • B32B27/32—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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
    • 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
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
    • B32B2310/0806—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation
    • B32B2310/0831—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene
    • 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
    • B32B2379/00—Other polymers having nitrogen, with or without oxygen or carbon only, in the main chain
    • B32B2379/08—Polyimides

Abstract

A flexible ultra-violet curable plastics sheet material for covering or repair purposes has a UV upper barrier layer (13) to prevent premature hardening of the resin. The sheet material may comprise a layer (11) of chopped glass fibre and a layer (10) of glass fibre tissue and at least one outer protective sheet (12). The sheet material may be carried by a support sheet (14) with an adhesive coating on each surface. <IMAGE>

Description

"Curable Plastic Sheet Material" This invention relates to a flexible plastics-based sheet material curable to solid of the type set out in GB 2,243,111B, hereinafter referred to as the earlier Patent. The invention is however applicable to other plastics-based material which cure under W radiation, ambient or applied.
It will be convenient to describe the invention as applied to the material of the earlier Patent wherein a curable plastic sheet material is characterised in that at least one layer of fibrous reinforcing material is laminated with a support layer of tissue, both layers being impregnated with a curable polymer including a radiation sensitive curing catalyst, the interstices of the tissue layer being sufficiently small such that on curing, the sheet material will be substantially water impermeable. The impregnated layers are sandwiched between outer removable protective layers. The disclosure of this earlier Patent Specification is incorporated into the present application by way of reference.
The invention is concerned with controlling the curing by UV radiation of the material when applied to a surface in use. Particularly when the material in accordance with the earlier Patent is used out-of-doors a too rapid curing may cause difficulties in application.
In accordance with the present invention there is provided a flexible sheet material based on a polymer composition which cures or sets to a solid state when subjected to ambient or applied W radiation, said material having at least one removable outer surface layer constituting a UV barrier, so that the flexible material may conveniently be applied to a surface to be covered without premature curing due to ambient UV radiation, the W barrier subsequently being removed to allow desired and controlled curing to take place.
In accordance with another aspect the material is carried by a double-sided adhesive sheet or tape. The outer adhesive surface of the material as supplied to a user will be covered by a masking tape.
The user of the material peels off the masking tape or piece and adheres the curable material in accordance with the invention to the surface which it is desired to cover for repair or other purposes. By making the material inherently adhesive the need for laying up with separately applied resin adhesive is avoided and the material in accordance with this development of the invention is particularly suitable for the nonprofessional D.I.Y. user. The material having been applied, using its self-adhesive properties, is caused or allowed to cure solid as set out in the earlier Patent.
It will be appreciated that the material in accordance with the invention with the UV barrier will be particularly suitable for out- door general purpose use particularly in hot countries or locations with high UV radiation levels. To avoid premature curing during transport and storage a UV barrier may substantially completely cover both surfaces of the material.
The invention will now be described by way of example and with reference to the accompanying drawings wherein: Figure 1 is a diagrammatic sectional view of flexible sheet material in accordance with a first embodiment of the invention and, Figure 2 is a similar view of material in accordance with a second embodiment of the invention.
The invention will be described with general reference to the material of the earlier Patent No. 2,243,111B and the material illustrated is in accordance with that Patent, developed in accordance with the present invention.
Thus briefly stated and in accordance with the earlier Patent the material of Figure 1 comprises layers 11 and 10 based respectively on chopped fibre glass fibres and glass fibre tissue, each layer impregnated with a curable polymer composition. The layers 10 and 11 are initially sandwiched between protective sheets 12 of nylon or similar which sheets also serve to facilitate the production process. This material and its manufacture are fully described in the earlier Patent Specification.
In accordance with the present invention and as illustrated at least that outer sheet 12 which is to be uppermost in use is substantially completely covered by a IN barrier sheet or film 13 of black plastics or functional equivalent. The barrier 13 in the embodiment being described is of Low Density Polyethylene blended during manufacture, or mixed in the extrusion melt, with sufficient carbon black to render it black and substantially opaque to W radiation. Additives other than carbon black which prevent or reduce W radiation transmission may be used. The barrier 13 is adhered to the layer 10 with an adhesive such as to allow it to be stripped off without removing sheet 12 when the covering process described in the earlier Patent is completed but prior to curing.The barrier 13 ensures that premature W curing and resultant stiffening does not take place until the material has been applied. Curing during transport and storage is also substantially prevented and a sheet material in accordance with the present invention is particularly useful in hot countries or locations with high W radiation levels.
In such environments both surfaces of the sheet material may with advantage be covered by a IN barrier layer 13.
A further desirable development of the invention is to provide the protective sheets 12 which, as described in the earlier Patent, form an integral part of the production process with W barrier properties by suitable impregnation or other treatment. With such a development the need for the separate IN barrier layers 13 could be avoided.
The embodiment described above has the barrier layers formed of Low Density Polythene though, of course, other known IN barriers, metal films, paper etc., could be used.
Turning to the second embodiment of the invention Figure 2 shows schematically and in section a curable sheet material of Figure 1 with a UV barrier layer on the front surface. The rear protective sheet 12 has, however, been removed and replaced by a double sided adhesive piece 14 to enable the piece to be adhered to the surface to be covered. The material as a whole thus has the rear adhesive surface covered by a masking sheet 15 which is peeled off prior to use. The front surface of 14 adheres by its own properties to the tacky resin impregnating 11 till the latter cures enhancing the bond.
The material shown in Figure 2 will usually be supplied as a relatively narrow strip on a reel the masking piece or strip 15 serving as a release allowing the strip to be dispersed from the reel. The end user of the material peels off the masking strip and adheres the material in accordance with the invention to the surface which it is desired to cover for repair or lining purposes. By making the material inherently adhesive the need for laying up with separately applied resins similar to or compatible with that which impregnates the curable layer is avoided. The material having been applied using its self-adhesive properties is caused or allowed to cure solid.
As illustrated the adhesive layer is a double sided adhesive tape with a thin polyester carrier 16 coated on both sides with an acrylic contact adhesive. In a development of the invention the adhesive layer is integral and self-supporting, the carrier layer 16 being omitted.
The present invention envisages as an alternative and different aspect the material of Figure 2 without the W barrier layer.
The drawings, as previously stated, are diagrammatic and much enlarged. Typically material in accordance with the invention will be between 1.2 and 2.5 mm in thickness.
The material in accordance with the invention finds application, amongst other things, in roofing and repair work and particularly in the lining of tanks for water and other liquids.

Claims (7)

CLAIMS:
1. Flexible sheet material based on a polymer composition which cures or sets to a solid state when subjected to ambient or applied IN radiation, said material having at least one removable outer surface layer constituting a W barrier, so that the flexible material may conveniently be applied to a surface to be covered without premature curing due to ambient IN radiation, the IN barrier subsequently being removed to allow desired and controlled curing to take place.
2. Flexible sheet material according to Claim 1 having a IN barrier layer at both outer surfaces.
3. Flexible sheet material according to Claim 1 or Claim 2 carried by a support sheet with an adhesive coating on each surface.
4. Flexible sheet material according to any preceding claim comprising a layer of chopped fibres, a tissue layer and at least one outer protective sheet.
5. Flexible sheet material according to Claim 4 and in accordance with any of the claims of G.B. 2,243,111B.
6. Flexible sheet material substantially as described with reference to the accompanying drawings.
7. A method of covering or lining a surface which comprises the step of applying material according to any preceding claim over the entire surface, removing the W barrier, and causing or allowing the material to cure solid by applied or ambient W radiation.
GB9509992A 1994-05-19 1995-05-17 Curable plastic sheet material Withdrawn GB2289436A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9410032A GB9410032D0 (en) 1994-05-19 1994-05-19 Curable plastic sheet material

Publications (2)

Publication Number Publication Date
GB9509992D0 GB9509992D0 (en) 1995-07-12
GB2289436A true GB2289436A (en) 1995-11-22

Family

ID=10755392

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9410032A Pending GB9410032D0 (en) 1994-05-19 1994-05-19 Curable plastic sheet material
GB9509992A Withdrawn GB2289436A (en) 1994-05-19 1995-05-17 Curable plastic sheet material

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9410032A Pending GB9410032D0 (en) 1994-05-19 1994-05-19 Curable plastic sheet material

Country Status (1)

Country Link
GB (2) GB9410032D0 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997044189A1 (en) * 1996-05-17 1997-11-27 Dunne Desmond C Curable sheet material
WO1998031895A1 (en) * 1997-01-20 1998-07-23 Rockwool Limited Composite roof system
EP0935035A1 (en) * 1998-02-09 1999-08-11 Peter Wirz Self-adhesive web material
EP2228198A1 (en) * 2009-05-18 2010-09-15 Lm Glasfiber A/S A method of strengthening a wind turbine blade and the strengthened blade
DE102012221942A1 (en) * 2012-11-30 2014-06-05 Wobben Properties Gmbh Process for the machining of a fiber-plastic composite of a rotor blade, semifinished product in the form of a structural composite and UV lamp for curing a UV-curable matrix material
EP3567178A1 (en) * 2018-05-08 2019-11-13 Carlisle Intangible Company Roof membranes with removable protective sheets

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1198316A (en) * 1967-08-29 1970-07-08 Minnesota Mining & Mfg Light-Curing Resinous Mass and Repair Pad incorporating same
GB2243111A (en) * 1988-10-03 1991-10-23 Thomas George Elliott Laminate and process for producing same
US5166007A (en) * 1991-09-11 1992-11-24 Smith W Novis Repair compositions and structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1198316A (en) * 1967-08-29 1970-07-08 Minnesota Mining & Mfg Light-Curing Resinous Mass and Repair Pad incorporating same
GB2243111A (en) * 1988-10-03 1991-10-23 Thomas George Elliott Laminate and process for producing same
US5166007A (en) * 1991-09-11 1992-11-24 Smith W Novis Repair compositions and structure

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997044189A1 (en) * 1996-05-17 1997-11-27 Dunne Desmond C Curable sheet material
WO1998031895A1 (en) * 1997-01-20 1998-07-23 Rockwool Limited Composite roof system
EP0935035A1 (en) * 1998-02-09 1999-08-11 Peter Wirz Self-adhesive web material
EP2228198A1 (en) * 2009-05-18 2010-09-15 Lm Glasfiber A/S A method of strengthening a wind turbine blade and the strengthened blade
WO2010133539A1 (en) * 2009-05-18 2010-11-25 Lm Glasfiber A/S A method of strengthening a wind turbine blade and the strengthened blade
DE102012221942A1 (en) * 2012-11-30 2014-06-05 Wobben Properties Gmbh Process for the machining of a fiber-plastic composite of a rotor blade, semifinished product in the form of a structural composite and UV lamp for curing a UV-curable matrix material
US9498923B2 (en) 2012-11-30 2016-11-22 Wobben Properties Gmbh Method for treating a fiber-plastic composite of a rotor blade, semifinished product in the form of a composite structure and UV lamp for curing a UV-curable matrix material
EP3567178A1 (en) * 2018-05-08 2019-11-13 Carlisle Intangible Company Roof membranes with removable protective sheets
US10801207B2 (en) 2018-05-08 2020-10-13 Carlisle Intangible, LLC Roof membranes with removable protective sheets
JP7460812B2 (en) 2018-05-08 2024-04-02 カーライル・インタンジブル・エルエルシー Roof membrane with removable protective sheet

Also Published As

Publication number Publication date
GB9410032D0 (en) 1994-07-06
GB9509992D0 (en) 1995-07-12

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)