GB2392866A - Vandal resistant polymeric recreational surfaces and tiles - Google Patents

Vandal resistant polymeric recreational surfaces and tiles Download PDF

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Publication number
GB2392866A
GB2392866A GB0221224A GB0221224A GB2392866A GB 2392866 A GB2392866 A GB 2392866A GB 0221224 A GB0221224 A GB 0221224A GB 0221224 A GB0221224 A GB 0221224A GB 2392866 A GB2392866 A GB 2392866A
Authority
GB
United Kingdom
Prior art keywords
lower layer
safety
vandal
polymeric
composite
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Withdrawn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
GB0221224A
Other versions
GB0221224D0 (en
Inventor
Frank Bowers
Matthew Gregory Bowers
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 GB0221224A priority Critical patent/GB2392866A/en
Publication of GB0221224D0 publication Critical patent/GB0221224D0/en
Publication of GB2392866A publication Critical patent/GB2392866A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/20—Making multilayered or multicoloured articles
    • B29C43/203—Making multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B29K2105/256—Sheets, plates, blanks or films
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/08—Reinforcements
    • 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
    • B32B2471/00—Floor coverings

Abstract

The invention discloses methods and materials for the production of vandal resistant polymeric compositions and tiles suitable, although not exclusively, for impact absorbing recreational surfaces for children's playing areas. The tile comprises an upper wearing surface layer and a lower layer of polymeric resilient material with a flexible reinforcing mesh incorporated between the layers. A lower layer tile mix may be introduced into the mould, followed by playing the mesh thereon and adding the wearing surface layer onto the mesh. Alternatively, the wearing surface layer mix may be introduced into the mould followed by the mesh and lower layer. The composite mixture may be compressed under heat until set and composite is allowed to cure. The lower layer of polymeric mixture may be laid onto a prepared sub-base and allowed to set before or after the laying of the mesh. The composite is tamped and polish after the laying of the wearing layer and then allowed to cure.

Description

1 2392866
VANDAL RESISTANT POLYMERIC RECREATIONAL
SURFACES AND TILES
This invention relates to methods and materials for the production of vandal resistant polymeric compositions, particularly, though by no means exclusively, suitable for impact absorbing recreatio nal surfaces for children's play areas.
Known such impact absorbing surfaces comprise particles of natural or synthetic rubber, such as SBR or EPDM for example, in a matrix of polymeric binder, such as polyurethane. The particles typically comprise granules or shreds of rubber.
In one known method of producing such impact absorbing surfaces, tiles comprising of re-cycled and nascent rubber granules/shred are manufactured using compression moulding. They are usually laminated, having a lower layer comprising entirely of polyurethane bound re-cycled rubber and a decorative upper wearing layercomprising of polyurethane bound coloured EPDM. The tiles are laid, abutted and fixed, by adhesive or by other means, onto a flat sub-base to form a safety surface.
Such tiles are subject to vandalism. The main method of vandalising these tile s is to first insert a knife though the wearing surface layer and then long lateral incisions causing severe damage.
In another known method of producing impact absorbing surfaces,
-2 polyurethane and rubber containing compositions of the types described above may be mixed on site and poured onto a subbase to form a sports or play surface. Such surfaces are also subject to vandalism described above. It is the object of the present invention to provide a method and materials for the production of vandal resistant impact absorbing safety surfaces comprising of both tiles and mixed on-site polymeric compositions.
According to the first aspect of the invention there is provided a composite safety tile comprising of an upper wearing surface layer, a flexible reinforcing mesh and a lower layer.
The flexible reinforcing mesh is fixed between the upper wearing surface layer and the lower layer during the fabrication of the tile.
The upper wearing surface layer may have a thickness of 0.5 cm to 1.5 cm. and have an exposed play area of between 250 square centimetres and 1 square mebe.
The flexible reinforcing mesh size may be 0.2 cm to Scm with a filament diameter maybe 0.05 cm to 0.5 cm. The filament may be manufactured from flexible wire or polymer or polymer coated wire.
The lower layer may have a thickness of 0.5 cm to 15 cm and may comprise of a rectangular section or a plurality of substantially frustro
- 3 pyramidal or frustro-conical formed supports.
In a specific example a vandal resistant composite safety tile may be manufactured by compression moulding comprising of the following steps: 1. Re-cycled SBR granules/shred are mixed with a catalysed Diphenylmethaneiisocyanate (MDI) based pre-polymer having a free (-NCO) of 10%.
2. Add pre-determined amount of SBRJPre-polymer mixture to the mould cavity.
3. Chicken wire (light wire netting with a hexagonal mesh) is cut into pieces that precisely fit the mould cavity.
4. A pre-cut piece is added on top of the SBRJpre-polymer mixture.
5. Coloured EPDM granules having sizes in the range of lmm - 3mm are mixed with a catalysedDiphenylmethane-Oiisocyanate (MDI) based pre- polymer having a free (-NCO) of 10%.
6. A quantity of the EPDM/pre -polymer mixture is added to the mould cavity in such an amount that it will have a finished thickness of 0.7 cm.
7. The mould lid is fitted and pressure and heat is applied until the tile composite sets.
8. The tile is removed and allowed to cure.
Polymeric safety tiles that incorporate the flexible mesh so described would resist lateral cutting with a knife even if the upper wearing surface was penetrated.
-4 The skilled reader will appreciate that numerous variants of the above described example are possible. For example, the process outlined above, the sequence of formating of the wearing and lower layer maybe reversed.. According to the second aspect of the invention there is provided a mixedon-site polymeric safety surface comprising of an upper wearing surface layer, a flexible reinforcing mesh and a lower layer ("shockpad").
The flexible reinforcing mesh is fixed between the upper wearing surface layer and the shockpad during the installation of the safety surface.
The upper wearing surface layer may have a thickness of 1 cm to 1.75 cm. The mesh size may be 0.2 cm to Scm with a filament diameter maybe 0.05 cm to 0.5 cm. The filament may be manufactured from flexible wire or polymer or polymer coated wire.
The shockpad may have a thickness of 1 cm to 15 cm.
In a specific example a vandal resistant mixed-on-site composite as may be manufactured according to the following steps: 1. Re-cycled SBR granules/shred are mixed with a catalysed Diphenylmethaneiisocyanate (MDI) based pre-polymer having a free (-NCO) of 10%.
-5 2. Apply the SBRJpre-polymer mixture to a prepared subbase using techniques similar to applying asphalt.
3. Lightly tamp and allow the SBRlpre-polymer mixture to cure.
4. Apply chicken wire (previously described) in continuous rolls to the exposed surface of the cured SBR/pre-polymer mixture.
5. Coloured EPDM granules having sizes in the range of lmm - 3mm are mixed with a catalysedDiphenylmethane-Diisocyanate (MDI) based pre- polymer having a free (-NCO) of 10%.
6. The coloured EPDM/pre-polymer mixture is applied to a finished thickness of 1.6 cm on top of the mesh.
7. Tamp to ensure correct degree of compactness and polish with a plasterers trowel to ensure a smooth upper wearing surface.
8. Allow to set.
Mixed-on-site polymeric safety surfaces that incorporate the flexible mesh so described would resist lateral cutting with a knife even if the upper wearing surface was penetrated.
The skilled reader will appreciate that numerous variants of the above described example are possible. For example the mesh might be applied directly to the uncured SBRJpre-polymer mixture or the tile.

Claims (21)

-6 CLAIMS
1. A vandal resistant impact absorbing composite safety tile comprising of an upper wearing surface layer and a lower layer of polymeric resilient material with a flexible reinforcing mesh incorporated between the wearing surface layer and lower layer.
2. A vandal resistant mixed-on-site composite polymeric safety surface comprising of an upper wearing surface layer and a lower layer of polymeric resilient material with a flexible reinforcing mesh incorporate d between the wearing surface layer and lower layer.
3. A vandal resistant mixed-on-site composite polymeric safety tile according to claim 1 in which Me flexible reinforcing mesh may be incorporated within the upper wearing course.
4. A vandal resistant impact absorbing safety tile according to claim 1 in which the wearing surface layer and the lower layer comprise of the same material.
5. A vandal resistant impact absorbing composite safety tile according to any of the previous claims in whic h the lower layer may comprise of a plurality of substantially frustro-pyramidal or frustro-conical formed supports.
6. A vandal resistant impact absorbing composite safety tile according to any previous claims in which the reinforcing mesh
may comprise of flexible wire, polymer or polymer coated wire with a mesh size of 0.2 cm to Scm and a filament diameterof O.05 cm to O.S cm.
7. A vandal resistant impact absorbing tile according to any of the previous claims in which the resilient composition comprises particles of a resilient material contained in a binder matrix.
8. An impact absorbing tile according to claim 7 in which the binder matrix is a polymer.
9. An impact absorbing tile according to claim 8 in which the polymer is polyurethane.
1 O.An impact absorbing tile according to any of claims 7 to 9 in which the particles comprise rubber.
11.A vandal resistant mixed-on-site composite polymeric safety surface according to claim 2 in which the reinforcing mesh may be incorporated within the upper wearing course.
12.A vandal resistant mixed-on-site composite polymeric safety surface according to any previous claim in which the reinforcing mesh may comprise of flexible wire, polymer or polymer coated wire with a mesh size of 0.2 cm to 5cm and a filament diameter of O.OS cm to 0.5 cm.
13.A vandal resistant mixed-on-site polymeric safety surface according to claim 1 in which the wearing surface layer and the
- 8 lower layer comprise of the same material.
14.A vandal resistant mixed-on-site composite polymeric safety surface according to any of the previous claims in which the resilient composition comprises particles of a resilient material contained in a binder matrix.
l5.A vandal resisting mixed-on-site composite polymeric safety surface according to claim 14 in which the binder matrix is a polymer.
16.A vandal resisting mixed-on-site composite polymeric safety surface according to claim 15 in which the polymer is polyurethane.
17.A vandal resisting mixed-on-site composite polymeric safety surface according to any of claims 14 to 16 in which the particles comprise rubber.
18.A method of manufacturing a vandal resistant impact absorbing composite safety tile by compression moulding comprising of the following steps: a. Introducing a lower layer tile mix into mould.
b. Placing a reinforcing mesh on the lower layer tile mix.
c. Adding the wearing surface layer onto the mesh.
d. Heat and compressing composite mixture until set.
e. Allowing the vandal resisting composite safety tiles to cure.
- 9 -
l9.A method of manufacturing a vandal resistant impact absorbing composite safety tile by compression moulding comprising of the following steps: a. Introducing a wearing surface layer tile mix into mould.
b. Placing a reinforcing mesh on the lower layer tile mix.
c. Adding the lower layer onto the mesh.
d. Heat and compressing composite mixture until set.
e. Allowing the vandal resisting composite safety tiles to cure.
20.A method of producing vandal resisting mixed-on-site polymeric safety surfaces comprising of the following steps: a. Lay the lower layer of polymeric mixture onto a prepared sub-base. b. Allow to set c. Apply flexible reinforcing mesh to surface of lower layer.
d. Lay the wearing surface layer.
e. Tamp and polish.
f. Allow to cure.
21.A method of producing vandal resisting mixed-onite polymeric safety surfaces comprising of the following steps: a. Lay the lower layer of polymeric mixture onto a prepared sub-base. b. Apply flexible reinforcing mesh to surface of lower layer.
c. Allow to set.
d. Lay the wearing surface layer.
e. Tamp and polish.
f. Allow to cure.
GB0221224A 2002-09-13 2002-09-13 Vandal resistant polymeric recreational surfaces and tiles Withdrawn GB2392866A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0221224A GB2392866A (en) 2002-09-13 2002-09-13 Vandal resistant polymeric recreational surfaces and tiles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0221224A GB2392866A (en) 2002-09-13 2002-09-13 Vandal resistant polymeric recreational surfaces and tiles

Publications (2)

Publication Number Publication Date
GB0221224D0 GB0221224D0 (en) 2002-10-23
GB2392866A true GB2392866A (en) 2004-03-17

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ID=9943980

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0221224A Withdrawn GB2392866A (en) 2002-09-13 2002-09-13 Vandal resistant polymeric recreational surfaces and tiles

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GB (1) GB2392866A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009030802A2 (en) 2007-09-03 2009-03-12 Dow Global Technologies Inc. Substrates containing a polymer layer and preparation methods therefor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE691162A (en) * 1965-12-15 1967-05-16
CH601567A5 (en) * 1977-02-04 1978-07-14 Pierre Zurkinden Surfacing for sports and playing field
US4170675A (en) * 1977-05-02 1979-10-09 Flexipane Limited Reinforced flexible panels comprising plastic sheeting on opposed sides of a mesh layer and a metal foil layer in association with a plastic sheet layer
US4492728A (en) * 1982-02-19 1985-01-08 Pierre Zurkinden Sports ground covering with expanded clay particles
ZA851995B (en) * 1984-08-28 1985-11-27 Gundle Plastics Pty Ltd Waterproofing and heat insulation material
EP0826830A1 (en) * 1996-08-29 1998-03-04 Berleburger Schaumstoffwerk GmbH Process for making floorcoverings and floorcovering consisting of a support layer and a top layer
US5773373A (en) * 1996-06-18 1998-06-30 Reef Industries, Inc. Reinforced laminate with elastomeric tie layer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE691162A (en) * 1965-12-15 1967-05-16
CH601567A5 (en) * 1977-02-04 1978-07-14 Pierre Zurkinden Surfacing for sports and playing field
US4170675A (en) * 1977-05-02 1979-10-09 Flexipane Limited Reinforced flexible panels comprising plastic sheeting on opposed sides of a mesh layer and a metal foil layer in association with a plastic sheet layer
US4492728A (en) * 1982-02-19 1985-01-08 Pierre Zurkinden Sports ground covering with expanded clay particles
ZA851995B (en) * 1984-08-28 1985-11-27 Gundle Plastics Pty Ltd Waterproofing and heat insulation material
US5773373A (en) * 1996-06-18 1998-06-30 Reef Industries, Inc. Reinforced laminate with elastomeric tie layer
EP0826830A1 (en) * 1996-08-29 1998-03-04 Berleburger Schaumstoffwerk GmbH Process for making floorcoverings and floorcovering consisting of a support layer and a top layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009030802A2 (en) 2007-09-03 2009-03-12 Dow Global Technologies Inc. Substrates containing a polymer layer and preparation methods therefor

Also Published As

Publication number Publication date
GB0221224D0 (en) 2002-10-23

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