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WO1987004663A1 - Feuille en mousse - Google Patents

Feuille en mousse Download PDF

Info

Publication number
WO1987004663A1
WO1987004663A1 PCT/GB1987/000105 GB8700105W WO8704663A1 WO 1987004663 A1 WO1987004663 A1 WO 1987004663A1 GB 8700105 W GB8700105 W GB 8700105W WO 8704663 A1 WO8704663 A1 WO 8704663A1
Authority
WO
WIPO (PCT)
Prior art keywords
foam
foam sheet
sheet
layer
rigid
Prior art date
Application number
PCT/GB1987/000105
Other languages
English (en)
Inventor
Christopher Peter Devereux
Original Assignee
Portapax 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 Portapax Ltd. filed Critical Portapax Ltd.
Publication of WO1987004663A1 publication Critical patent/WO1987004663A1/fr

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
    • B32B5/18—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 features of a layer of foamed 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0221—Vinyl resin
    • B32B2266/0228—Aromatic vinyl resin, e.g. styrenic (co)polymers
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Definitions

  • FOAM SHEET This invention relates to foam sheet, and more particularly to extruded foam sheet and composites of the same for trays or boxes, crates, cartons or other containers.
  • the invention is especially concerned with the protection of the contents or items carried in or on the above.
  • Extruded plastics foam is used to make a number of boxes, trays and containers for various products but in especially in the fresh, chilled, frozen and fast food fields.
  • foam apart from its thermal insulation properties, is the fact that it is generally totally impervious to water and moisture.
  • extruded foam Another advantage of extruded foam is that it can be made to be extremely tough and rigid while still being economical to produce. This toughness and/or rigidity can be achieved by making the foam of a high density. Other better and more economical ways are to "skin" one or both surfaces of the foam by collapsing the surface with low temperature and/or pressure, or to extrusion coat or laminate one or both surfaces of the foam with a thin solid sheet made out of the same or a different raw material. The result is a rigid but generally hard surfaced sheet.
  • Soft foam sheets i.e. low density foam sheets and foam sheets which have not been "skinned”, coated or laminated
  • Soft foam sheets are ideal for protecting such delicate foods described above.
  • U.S. Patents Nos. US-A-4059660 and US-A-4119749 disclose a light-weight framed panel comprising a foamed material sandwiched between a cardboard material and a finishing cover, the sandwich structure being further provided over certain areas thereof with a foamed polyurethane layer.
  • U.S. Patent No. US-A-3787259 discloses a floor covering which has a felt backing sandwiched between two foam layers.
  • the present invention provides an extruded foam sheet material, comprising a foamed plastics material having on both surfaces thereof a relatively rigid layer, wherein there is provided on at least one surface thereof another layer of a foamed plastics material.
  • Such a foam sheet material according to the invention may be used for trays or boxes, crates, cartons or other containers (hereinafter referred to for convenience as containers), either to form the structure of the container itself or to provide a lining therefor.
  • the present invention takes advantage of the strength and rigidity of "skinned", coated or laminated foam sheet and adds a soft foam to one or both surfaces
  • the resultant composite foam may be then folded or formed and cut into trays,
  • the soft foam is (to the greater part) in contact with the contents of the container, thereby giving protection against knocks. etc., the "skinned", coated or laminated foam sheet providing the strength and rigidity to support the contents.
  • the foam sheet shown in the drawing comprises a core of a foam sheet 1, both surfaces of which are provided with relatively rigid thin sheets 2 and 3 respectively, formed either by collapsing the surfaces of the foam sheet 1 by means of low temperature and/or pressure, or by extrusion coating or laminating the foam layer 1 with a thin solid sheet of the same material as the foam 1 or a different material.
  • the composite structure 1, 2, 3 is a rigid but generally hard surfaced sheet, to which there is applied, according to the invention, another foam sheet 4, usually of softer material than the foam sheet 1.
  • a preferably soft foam sheet with either an open (i.e. relatively porous or sponge-like) cell construction throughout, or- alternatively on its surface, and apply it in the same manner described above to the other foam sheet so that the soft, open cell foam sheet is, in general, in contact with food that emits liquid or moisture or has liquid or moisture clinging to it.
  • the open cell foam types described above absorb or dissipate the unwanted moisture or liquid thereby keeping the food relatively dry.
  • the foam sheet may be arranged so that in use the soft, open cell foam sheet is on the outside of a container formed therefrom, so that evaporation from the open cells will assist in cooling of the contents of the container.
  • the two foam sheets can be joined together by a number of means.
  • the preferred method is to laminate the connecting surfaces by first heating these surfaces and then applying pressure with rollers once the surfaces have been brought into contact.
  • Another method is to extrude the two foam sheets simultaneously and to bring the foam sheets into contact with each under pressure such as by means of two rollers,
  • a further method is to apply the soft foam sheet through pressure rollers after the rigid foam sheet has been softened by the heaters of a thermoforming machine and prior to the combined sheet being thermoformed by a mould.
  • the structure of the combined foam sheet can vary-according to the desired characteristics.
  • the foam sheet has a laminated or "skinned" surface 3 on the outside, a “skinned” surface 2 in the middle between the rigid foam 1 and the soft foam 4 and the soft foam 4 on the other surface.
  • the soft foam 4 may be arranged on the outside of a container formed from the sheet.
  • the soft foam 4 prior to applying the soft foam 4 can be suitably "skinning", extrusion coating or laminating.
  • the preferred basic material for the core of the rigid foam 1 is polystyrene but may also be other thermoplastic materials such as polyethyleneterephthalate (PET), high density polyethylene, styrene copolymers, etc.
  • PET polyethyleneterephthalate
  • high density polyethylene high density polyethylene
  • styrene copolymers etc.
  • the preferred basic material for the coating or lamination 2,3 on the rigid foam is polystyrene but may also be any other thermoplastic material or paper or metal foil.
  • the preferred basic material for the soft foam 4 is low density polyethylene but may also be polystyrene or another thermoplastic.
  • foam sheet material of the present invention may be extruded continuously, in contrast for example to the panel disclosed in the above mentioned U.S. Patent Nos. 4059660 and 4119749 where the cardboard layer utilized could not be continuously provided.
  • the soft foam 4 may be suitably shaped to receive individual items of produce to be contained within a container formed from the foam sheet, for example the soft foam 4 may be provided with a series of indentations or cells, formed therein for receiving fruit such as apples or oranges.

Landscapes

  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

Un matériau en mousse extrudé en forme de feuille comprend un matériau en mousse plastique (1), dont les deux côtés sont pris en sandwich par une couche relativement rigide (2, 3). Une autre couche en mousse (4) est appliquée sur au moins une des surfaces de la structure ainsi formée de façon à obtenir une structure à quatre couches. Ledit matériau en mousse en forme de feuille peut être utilisé pour des conteneurs, soit pour constituer la structure même du conteneur soit pour servir de garnissage pour ledit conteneur.
PCT/GB1987/000105 1986-02-11 1987-02-11 Feuille en mousse WO1987004663A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868603341A GB8603341D0 (en) 1986-02-11 1986-02-11 Foam sheet
GB8603341 1986-02-11

Publications (1)

Publication Number Publication Date
WO1987004663A1 true WO1987004663A1 (fr) 1987-08-13

Family

ID=10592863

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1987/000105 WO1987004663A1 (fr) 1986-02-11 1987-02-11 Feuille en mousse

Country Status (3)

Country Link
EP (1) EP0258304A1 (fr)
GB (1) GB8603341D0 (fr)
WO (1) WO1987004663A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2223712A (en) * 1988-09-23 1990-04-18 York Trailer Co Ltd Insulated body member
EP0372846A2 (fr) * 1988-12-01 1990-06-13 Sekisui Kaseihin Kogyo Kabushiki Kaisha Procédé pour préparer une mousse de résine de polyester
EP0558620A1 (fr) * 1990-11-20 1993-09-08 Linpac Plastics International Limited Procede de fabrication de materiaux composites en feuilles
WO1994021536A1 (fr) * 1993-03-24 1994-09-29 W. L. Gore & Associates, Inc. Recipient isolant pour aliments constitue d'un lamine polymere qui respire
AT410958B (de) * 1996-03-01 2003-09-25 Bruer Manfred Aus kunststoffschaum, insbesondere polystyrolschaum, bestehende schale einer verlorenen schalung zur errichtung von betonwänden
US9096869B2 (en) 2011-10-21 2015-08-04 Intervet, Inc. Recombinant nonpathogenic MDV vector providing multivalent immunity
US9409954B2 (en) 2011-10-21 2016-08-09 Intervet Inc. Recombinant non-pathogenic marek's disease virus constructs encoding infectious laryngotracheitis virus and newcastle disease virus antigens
US9757449B2 (en) 2013-07-26 2017-09-12 Intervet Inc. Acceleration of vector virus induced immune response in avians
US10308956B2 (en) 2014-12-24 2019-06-04 Intervet Inc. HVT-vectored ND-IBD vaccine
US11596687B2 (en) 2016-06-17 2023-03-07 Intervet Inc. Recombinant non-pathogenic Marek's disease virus constructs encoding infectious laryngotracheitis virus and infectious bursal disease virus antigens

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU59642A1 (fr) * 1968-10-14 1970-04-14
GB1575412A (en) * 1975-11-04 1980-09-24 Rausing A Packaging containers and packaging material therefor
US4228209A (en) * 1978-06-06 1980-10-14 Chavannes Marc A Wire reinforced corrugated board and method and apparatus for making same
FR2491826A1 (fr) * 1980-10-15 1982-04-16 Lauragri Sa Procede et installation pour l'obtention d'un materiau stratifie (ethylene, acetate de vinyle, polystyrene expanse) par extrusion et calandrage et materiau obtenu
US4559255A (en) * 1983-12-26 1985-12-17 Hitachi, Ltd. Acoustical absorbing material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU59642A1 (fr) * 1968-10-14 1970-04-14
GB1575412A (en) * 1975-11-04 1980-09-24 Rausing A Packaging containers and packaging material therefor
US4228209A (en) * 1978-06-06 1980-10-14 Chavannes Marc A Wire reinforced corrugated board and method and apparatus for making same
FR2491826A1 (fr) * 1980-10-15 1982-04-16 Lauragri Sa Procede et installation pour l'obtention d'un materiau stratifie (ethylene, acetate de vinyle, polystyrene expanse) par extrusion et calandrage et materiau obtenu
US4559255A (en) * 1983-12-26 1985-12-17 Hitachi, Ltd. Acoustical absorbing material

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2223712B (en) * 1988-09-23 1992-10-14 York Trailer Co Ltd Improvements in and relating to thermally insulated containers
GB2223712A (en) * 1988-09-23 1990-04-18 York Trailer Co Ltd Insulated body member
EP0372846A2 (fr) * 1988-12-01 1990-06-13 Sekisui Kaseihin Kogyo Kabushiki Kaisha Procédé pour préparer une mousse de résine de polyester
EP0372846A3 (fr) * 1988-12-01 1991-07-10 Sekisui Kaseihin Kogyo Kabushiki Kaisha Procédé pour préparer une mousse de résine de polyester
EP0547032A2 (fr) * 1988-12-01 1993-06-16 Sekisui Kaseihin Kogyo Kabushiki Kaisha Feuille de mousse de résine polyester
EP0547032A3 (en) * 1988-12-01 1993-08-11 Sekisui Kaseihin Kogyo Kabushiki Kaisha Polyester resin foam sheet
AU643402B2 (en) * 1988-12-01 1993-11-11 Sekisui Kaseihin Kogyo Kabushiki Kaisha Process for producing a shaped article
EP0558620A4 (fr) * 1990-11-20 1995-01-11 Linpac Plastics Int
EP0558620A1 (fr) * 1990-11-20 1993-09-08 Linpac Plastics International Limited Procede de fabrication de materiaux composites en feuilles
WO1994021536A1 (fr) * 1993-03-24 1994-09-29 W. L. Gore & Associates, Inc. Recipient isolant pour aliments constitue d'un lamine polymere qui respire
US5454471A (en) * 1993-03-24 1995-10-03 W. L. Gore & Associates, Inc. Insulative food container employing breathable polymer laminate
AT410958B (de) * 1996-03-01 2003-09-25 Bruer Manfred Aus kunststoffschaum, insbesondere polystyrolschaum, bestehende schale einer verlorenen schalung zur errichtung von betonwänden
US9096869B2 (en) 2011-10-21 2015-08-04 Intervet, Inc. Recombinant nonpathogenic MDV vector providing multivalent immunity
US9409954B2 (en) 2011-10-21 2016-08-09 Intervet Inc. Recombinant non-pathogenic marek's disease virus constructs encoding infectious laryngotracheitis virus and newcastle disease virus antigens
US9757449B2 (en) 2013-07-26 2017-09-12 Intervet Inc. Acceleration of vector virus induced immune response in avians
US10308956B2 (en) 2014-12-24 2019-06-04 Intervet Inc. HVT-vectored ND-IBD vaccine
US11596687B2 (en) 2016-06-17 2023-03-07 Intervet Inc. Recombinant non-pathogenic Marek's disease virus constructs encoding infectious laryngotracheitis virus and infectious bursal disease virus antigens

Also Published As

Publication number Publication date
GB8603341D0 (en) 1986-03-19
EP0258304A1 (fr) 1988-03-09

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