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AU2013282738B2 - Casing for a paste - Google Patents
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AU2013282738B2 - Casing for a paste - Google Patents

Casing for a paste Download PDF

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Publication number
AU2013282738B2
AU2013282738B2 AU2013282738A AU2013282738A AU2013282738B2 AU 2013282738 B2 AU2013282738 B2 AU 2013282738B2 AU 2013282738 A AU2013282738 A AU 2013282738A AU 2013282738 A AU2013282738 A AU 2013282738A AU 2013282738 B2 AU2013282738 B2 AU 2013282738B2
Authority
AU
Australia
Prior art keywords
polyethylene
casing
density polyethylene
polyamide
low density
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.)
Ceased
Application number
AU2013282738A
Other versions
AU2013282738A1 (en
Inventor
Derrick GEORGE
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.)
COLUMBIT Pty Ltd
Original Assignee
COLUMBIT Pty 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 COLUMBIT Pty Ltd filed Critical COLUMBIT Pty Ltd
Publication of AU2013282738A1 publication Critical patent/AU2013282738A1/en
Application granted granted Critical
Publication of AU2013282738B2 publication Critical patent/AU2013282738B2/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/02—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape
    • B65D3/04—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape essentially cylindrical
    • 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
    • B32B27/06—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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/28—Other details of walls
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • 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
    • B32B2439/40—Closed containers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Wrappers (AREA)
  • Processing Of Meat And Fish (AREA)

Abstract

A cylindrical casing for containing pastes such as edible pastes and which comprises two films (12, 14) which are laminated together. One film is of polyamide and the other is of polyethylene. The casing includes an overlap seal.

Description

CASING FOR A PASTE THIS INVENTION relates to a casing for a paste.
Casings for pastes are manufactured using films of many different types of synthetic plastics material. The films that are chosen depend on the properties that are required. When edible products are in the casing, gas barrier properties are usually required to prevent oxygen penetration into the casing. Likewise water vapour barrier properties are required to prevent transfer of water to and from the paste.
In addition to their barrier properties, the films must be compatible with one another in the sense that it must be possible to laminate them together and then secure the longitudinally extending edges of the films together by heat sealing to form the requisite cylindrical casing.
The use of casings comprising different films laminated together not only enables the requisite properties to be obtained, but also enables printing to be applied to one of the surfaces of one of the films which is then covered by another film which is transparent. The printing is thus visible but not exposed and cannot be scuffed during processing, handling and transport. The problem with scuffed casings is that they look old and customer resistance is encountered.
It is desirable that embodiments of the present invention provide a casing with the desired gas and water barrier properties which can be formed with a heat sealed seam.
According to the present invention there is provided a cylindrical casing for paste which comprises two films of synthetic plastics material laminated together, one film being of polyamide and the other film being of polyethylene and there being an overlap seal where the polyamide is heat sealed to the polyethylene.
The polyamide can be shrinkable polyamide.
The polyethylene can be low density polyethylene, linear low density polyethylene, high density polyethylene or metallocene polyethylene.
Preferably the polyethylene is a blend of linear low density polyethylene and high density polyethylene with the linear low density polyethylene predominating.
For the better understanding of the present invention reference will now be made, by way of non-limiting example, to the accompanying drawing in which the single Figure is a diagrammatic representation of the heat sealed overlap seam of a tubular casing.
The single Figure diagrammatically illustrates the overlap seal 10 of a tubular casing, the chain dotted line indicating the fact that the portion illustrated is part of a cylindrical product.
The outer film 12 is of a shrinkable polyamide which will hereinafter simply be referred to as "nylon". It is laminated to an inner film 14 which is low density polyethylene, linear low density polyethylene, high density polyethylene, metallocene polyethylene or a blend of these forms of polyethylene. A preferred blend for the inner film 14 comprises a preponderance of linear low-density polyethylene and a smaller portion of high-density polyethylene. The blend can also include pigment, preferably white pigment, anti-block and other constituents to obtain a casing having the desired properties.
The cylindrical casing is formed by overlapping the edges of an elongate web and then heat sealing the inner surface of the polyethylene constituting the inner film to the outer surface of the nylon which comprises the outer film. Alternatively the nylon can comprise the inner film and its inner surface can be heat sealed to the outer surface constituted by the polyethylene.
It has been found experimentally that the two films can, at the overlapped edge zones, successfully be heat sealed to one without degrading the polyethylene whilst still reaching a temperature sufficient to fuse the nylon and the polyethylene. The resultant seam of the casing, after the casing has been briefly scalded to shrink it onto the contained paste, has an appearance which is of acceptable quality.
The invention has been described by way of non-limiting example only and many modifications and variations may be made thereto without departing from the spirit and scope of the invention.
Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
The reference in this specification to any prior publication {or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.

Claims (4)

  1. THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
    1. A cylindrical casing for paste which comprises two films of synthetic plastics material laminated together, one film being of polyamide and the other film being of polyethylene and there being an overlap seal at which the polyamide is heat sealed to the polyethylene.
  2. 2. A casing as claimed in claim 1, wherein the polyamide is shrinkable polyamide.
  3. 3. A casing as claimed in claim 1 or 2, wherein the polyethylene is low density polyethylene, linear low density polyethylene, high density polyethylene or metallocene polyethylene.
  4. 4. A casing as claimed in claim 3, wherein the polyethylene is a blend of linear low density polyethylene and high density polyethylene with the linear low density polyethylene predominating.
AU2013282738A 2012-06-26 2013-06-26 Casing for a paste Ceased AU2013282738B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA2012/04740 2012-06-26
ZA201204740 2012-06-26
PCT/IB2013/055245 WO2014002027A1 (en) 2012-06-26 2013-06-26 Casing for a paste

Publications (2)

Publication Number Publication Date
AU2013282738A1 AU2013282738A1 (en) 2015-01-29
AU2013282738B2 true AU2013282738B2 (en) 2016-09-08

Family

ID=49782358

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2013282738A Ceased AU2013282738B2 (en) 2012-06-26 2013-06-26 Casing for a paste

Country Status (5)

Country Link
US (1) US20150191270A1 (en)
AU (1) AU2013282738B2 (en)
NZ (1) NZ703561A (en)
WO (1) WO2014002027A1 (en)
ZA (1) ZA201409491B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710443A1 (en) * 1993-05-17 1996-05-08 Colpak (Proprietary) Limited Casings for containing paste
EP0993940A1 (en) * 1998-10-02 2000-04-19 Kalle Nalo GmbH & Co. KG Shrinkable, laminated or coated film with improved barrier effectiveness, and a film tube produced therefrom with a welded seam
US20090260324A1 (en) * 2004-10-01 2009-10-22 Orihiro Co., Ltd. Pillow Packaging Bag, Pillow Type Packaged Body, Heat Seal Bar for Pillow Packaging Machine, and Pillow Packaging Machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070014897A1 (en) * 1992-06-05 2007-01-18 Ramesh Ram K Backseamed casing and packaged product incorporating same
EP0797918A1 (en) * 1996-03-29 1997-10-01 Gunze Kobunshi Corporation Casing for smoking and storage of foodstuffs
CH695681A5 (en) * 2000-08-22 2006-07-31 Maegerle Karl Lizenz multi-chamber
US8053047B2 (en) * 2004-04-02 2011-11-08 Curwood, Inc. Packaging method that causes and maintains the preferred red color of fresh meat
CA2566110A1 (en) * 2004-05-14 2005-12-01 Cryovac, Inc. Packaging process utilizing reclosable package having pressure-induced reclose seal which becomes stronger at low temperature

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710443A1 (en) * 1993-05-17 1996-05-08 Colpak (Proprietary) Limited Casings for containing paste
EP0993940A1 (en) * 1998-10-02 2000-04-19 Kalle Nalo GmbH & Co. KG Shrinkable, laminated or coated film with improved barrier effectiveness, and a film tube produced therefrom with a welded seam
US20090260324A1 (en) * 2004-10-01 2009-10-22 Orihiro Co., Ltd. Pillow Packaging Bag, Pillow Type Packaged Body, Heat Seal Bar for Pillow Packaging Machine, and Pillow Packaging Machine

Also Published As

Publication number Publication date
WO2014002027A1 (en) 2014-01-03
ZA201409491B (en) 2016-08-31
AU2013282738A1 (en) 2015-01-29
NZ703561A (en) 2016-10-28
US20150191270A1 (en) 2015-07-09

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Legal Events

Date Code Title Description
FGA Letters patent sealed or granted (standard patent)
MK14 Patent ceased section 143(a) (annual fees not paid) or expired