GB1565915A – Aluminium/plastics laminate foils
– Google Patents
GB1565915A – Aluminium/plastics laminate foils
– Google Patents
Aluminium/plastics laminate foils
Download PDF
Info
Publication number
GB1565915A
GB1565915A
GB24559/77A
GB2455977A
GB1565915A
GB 1565915 A
GB1565915 A
GB 1565915A
GB 24559/77 A
GB24559/77 A
GB 24559/77A
GB 2455977 A
GB2455977 A
GB 2455977A
GB 1565915 A
GB1565915 A
GB 1565915A
Authority
GB
United Kingdom
Prior art keywords
foil
aluminium
laminate
plastics
adhesive
Prior art date
1976-06-14
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.)
Expired
Application number
GB24559/77A
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.)
Alcan Holdings Switzerland AG
Original Assignee
Alusuisse Holdings AG
Schweizerische Aluminium AG
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.)
1976-06-14
Filing date
1977-06-13
Publication date
1980-04-23
1977-06-13
Application filed by Alusuisse Holdings AG, Schweizerische Aluminium AG
filed
Critical
Alusuisse Holdings AG
1980-04-23
Publication of GB1565915A
publication
Critical
patent/GB1565915A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
B32B15/00—Layered products comprising a layer of metal
B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
B32B15/08—Layered products comprising a layer of metal comprising metal 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
B32B15/00—Layered products comprising a layer of metal
B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
B32B15/08—Layered products comprising a layer of metal comprising metal 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
B32B15/09—Layered products comprising a layer of metal comprising metal 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 comprising polyesters
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
B32B15/00—Layered products comprising a layer of metal
B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
B32B15/08—Layered products comprising a layer of metal comprising metal 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
B32B15/085—Layered products comprising a layer of metal comprising metal 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 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
B32B15/00—Layered products comprising a layer of metal
B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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
B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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
B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle 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
B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
B32B7/04—Interconnection of layers
B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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
B32B2310/14—Corona, ionisation, electrical discharge, plasma treatment
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
B32B2311/00—Metals, their alloys or their compounds
B32B2311/24—Aluminium
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
B32B2323/10—Polypropylene
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
B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
Y10T156/10—Methods of surface bonding and/or assembly therefor
Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
Y10T428/1359—Three or more layers [continuous layer]
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
Y10T428/264—Up to 3 mils
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/31504—Composite [nonstructural laminate]
Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
Y10T428/31565—Next to polyester [polyethylene terephthalate, etc.]
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/31504—Composite [nonstructural laminate]
Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
Y10T428/31573—Next to addition polymer of ethylenically unsaturated monomer
Y10T428/31587—Hydrocarbon polymer [polyethylene, polybutadiene, etc.]
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/31504—Composite [nonstructural laminate]
Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
Y10T428/31605—Next to free metal
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/31504—Composite [nonstructural laminate]
Y10T428/31678—Of metal
Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
Description
PATENT SPECIFICATION
( 21) Application No 24559/77 ( 22) Filed 13 June 1977 ( 31) Convention Application No 7501/76 ( 32) Filed 14 June 1976 in ( 33) Switzerland (CH) ( 44) Complete Specification published 23 April 1980 ( 51) INT CL 3 B 32 B 7/12 15/08 15/20 27/36 27/40 ( 52) Index at acceptance B 5 N 0712 1508 1520 2704 2706 2732 2736 2740 ( 72) Inventors WERNER FESTAG KLAUS FARRENKOTHEN and HANS-UELI MULLER ( 54) ALUMINIUM/PLASTICS LAMINATE FOILS ( 71) We, SWISS ALUMINIUM LTD, a company organised under the laws of Switzerland, of Chippis (Canton of Valais), Switzerland, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the
following statement:-
The invention relates to aluminium/plastics laminate foils, which are suitable in particular for the production of containers for holding sensitive goods such as foodstuffs, pharmaceuticals, chemicals and similar products, the said containers being highly efficient at excluding light, oxygen, water vapour and aromas from external sources, and also at preventing loss of aroma from the contents of the container itself.
Aluminium/plastics laminate foils are used a great deal today to make rigid or flexible forms of packaging for holding goods such as foodstuffs, pharmaceuticals, chemicals etc The known, currently used aluminium/plastics laminate foils are very efficient at excluding light, oxygen, water vapour and aromas from external sources and at preventing loss of aroma from the contents They also prevent goods from perishing, and prevent changes in product quality over long periods of time Contained in such packaging, sterilised foodstuffs such as pre-cooked foods, meat, and vegetable products can be stored at room temperature for more than 1-2 years without any noticeable changes taking place in flavour or quality.
In order to impart to the aluminium foil in the laminate the maximum possible elongation at fracture thus making it more able to withstand the mechanical stressing involved for example in operations requiring pulling, folding and bending, plastics foils with relatively low elongation at fracture ( 20-100 ,) and tensile strength values of 10-20 kp/mm 2 have been recommended up to now By using a two-component adhesive between the aluminium and the plastics, it was possible to produce aluminium/plastics laminate foils which withstood an elongation of 20-30 % without producing any damage to the aluminium foil and therefore without losing their barrier properties after the unavoidable folding and tensile stressing (see for example «Aluminium», Vol 45, No 5, May 1969, p.
284 bottom left, and German patent 1,236,904, column 4, last paragraph).
In the case of the aluminium/plastics laminate foils which have been known up to now, it has been found that although the sensitive aluminium foil when joined to plastics foils is protected to a large extent from mechanical loading, the limited elongation at fracture which it exhibits impairs the properties of the laminate foil in that it cannot be used for the manufacture of flexible or semi-rigid containers by the deep drawing process normally used with plastics foils Although such aluminium/plastics laminate foils are used a great deal, for example for forms of packaging such as flat bags or pouches, tubular bags, side and end sealed bags, blister packaging etc, they are still excluded from import sectors of packaging technology.
Because of the low elongation at fracture of the aluminium foil, it has not been possible up to now to deep draw semirigid or flexible aluminium/plastics laminate foils into trough-shaped containers, as for example is achieved in the manufacture of containers made of plastics, since in the stretching operation involved the aluminium foil forms cracks and pores and therefore loses its barrier properties.
The object of the invention presented here was then to produce aluminium/plastics laminate foils with which the above-described disadvantages, ( 11) 1 565 915 ( 19) 1,565,915 associated with the laminate foils known up to now, are avoided and which exhibit not only a very pronounced ability to withstand stresses due to tensile, bending and compressive forces, but also make deep drawing possible because of the high elongation at fracture which the said aluminium/plastics laminate foils possess.
The object of the invention is achieved by an aluminium/plastics laminate foil comprising an aluminium foil, with plastics foil joined to one or both faces of the aluminium foil by an adhesive layer, the or each plastics foil exhibiting an elongation at fracture of 80-180 , the or each adhesive layer having a shear strength of at least 0 3 N/mm 2, and the aluminium foil bearing less than half the load on the laminate when the laminate is subjected to tension less than that causing fracture.
With such aluminium/plastics laminate foils it is possible to achieve an elongation of 40-120 O in a tensile test without tearing or forming macropores.
If such a laminate foil is tensile stressed in all directions, e g by compressed air forming or stamping, it is possible to achieve a 20-60 %’ increase in surface area, forming containers which are permanent in shape and at the same time keeping the aluminium foil intact.
It has been found that the strength and elongation of the plastics foil at fracture are not suitable criteria for the selection of the plastics foil which, in combination with an aluminium foil, can protect the aluminium from tearing and forming pores In selecting the plastics foil it is much more important that the plastics foil bears a greater proportion of the load within the desired elongation than the aluminium foil, i e the load carried by the plastics foil or the total load carried by all the plastics foils, if two or more are present, should be greater than the load carried by the aluminium foil.
Polyester foils are preferred.
Moreover, it is necessary that the plastics foil is joined to the aluminium foil by an adhesive which has a shear strength of at least 0 3 N/mm 2 The peeling strength which is normallv measured to determine the bond strength of aluminium/plastics laminate foils is not a suitable criterion for choosing the correct adhesive.
It has been found that the use of adhesives with shear strength values below 0.3 N/mm 2 leads to cracking and pore formation in the aluminium/plastics laminate foil, even when used with plastics foils which exhibit an optimum strengthelongation behaviour.
The accompanying drawings illustrate in a simplified, schematic manner, one example of a laminate foil embodying the invention In these drawings:Figure 1 is a section through an aluminium/plastics laminate foil; and Figure 2 is a load-elongation diagram obtained by measuring with 15 mm wide strip samples in accordance with the specification DIN 53455.
In the process for manufacturing the aluminium/plastics foil I shown in Figure 1, 1.5-2 5 g/m 2 (dry weight) of a twocomponent adhesive 2 which exhibits shear strength of 2 50 N/mm 2 is deposited on a 20 um thick aluminium foil 3 (preferably soft annealed 99 2 % Al) by means of a suitable roller which is not shown here Preferably the adhesive is a polyurethane-based adhesive The adhesive 2 is dried and cured at 100-120 «C, and then a 12 5 1 um thick polyethyleneterephthalate foil 4, immediately after treating with a corona discharge in such a way that it has a surface tension of 56 dynes/cm, is stuck on to the aluminium foil I on top of the adhesive 2 by passing the laminate over a roll heated to 85-900 C and with the aid of a rubber pressure roll (not shown here).
The polyethyleneterephthalate foil 4 (i e.
polyester foil) exhibits an elongation at fracture of 150 % and the following loadelongation behaviour.
Elongation % % % % % % Load 97 N/mm 2 108 N/mm 2 N/mm 2 147 N/mm 2 158 N/mm 2 N/mm 2 In this example, the aluminium foil is covered on the other face with an identical polyester foil 4.
Finally 2 0-3 5 g/m 2 of the same adhesive is deposited on one of the polyester foils 4, dried at 1100 C, and covered with a 50 pm thick, unstretched polypropylene foil 5 which exhibits a surface tension of 50-53 dynes/cm after prior treatment with corona discharge, the laminating being done by means of a rubber roller at a roll temperature of 105 ‘C Other thicknesses of polypropylene, in the range 40-60 jm, may be used.
After curing the adhesive 2, the aluminium/plastics laminate foil 1 yielded a force-elongation diagram as shown in Figure 2 If the forces producing a specific elongation in the polyester foils 4 and the polypropylene foil 5 are subtracted from the force-elongation curve for the laminate foil, then the force-elongation curve for the aluminium foil 3 is obtained From the diagram shown in Figure 2 it can be seen that the total of the tensile forces borne by the polyester foils 4 plus the polypropylene foil 5 is greater at all elongations than the 1,565,915 tensile force borne by the aluminium foil 3 at the same elongation The elongation at fracture of the polyester foil can, depending on the application be between 80 %,/ and 180 «,.
Laminate foils according to the invention are particularly well suited for the manufacture of containers by the wellknown deep drawing process.
Containers were produced with the laminate foil I by stretching the toil 1 over a negative mould which draws on an area of mmx 125 mm of the laminate foil, and shaping the foil into a 30 mm deep trough using compressed air at a pressure of 3 2 bar.
The container produced by this method, which is not described in any greater detail here, had a stable shape after deep drawing, and the aluminium foil 3 exhibited no macropores or cracks Such a container filled with a ready-cooked meal (rice with pieces of meat) and having a lid made up of 12,um thick polyethyleneterephthalate/12 Mm thick aluminium/75 Mm thick polypropylene, sealed and sterilised at 1210 C for 30 min in a counter-pressure autoclave at 2 6 bar, still exhibited contents in perfect condition after 1 year of storage at 20-250 C.
Claims (4)
WHAT WE CLAIM IS:-
1 An aluminium/plastics laminate foil comprising an aluminium foil, with plastics foil joined to one or both faces of the aluminium foil by an adhesive layer, the or each plastics foil exhibiting an elongation at fracture of 80-180 ,,, the or each adhesive layer having a shear strength of at least 0 3 N/mm 2, and the aluminium foil bearing less than half the load on the laminate when the laminate is subjected to tension less than that causing fracture.
2 A laminate foil according to claim 1, in which the plastics foil is of a polyester, and an unstretched polypropylene foil, which exhibits a surface tension of 50-53 dynes/cm after having been given corona discharge treatment, is stuck on to the polyester foil by means of an adhesive.
3 A laminate foil according to claim 2, in which the adhesive between the polyester foil and the polypropylene foil has a weight of 2-35 g/m 2 when dry.
4 A laminate foil according to claim 3, in which the polypropylene foil has a thickness in the range 40-60 Mum.
A laminate foil according to any of claims 1 to 4, in which a two component, polyurethane-based adhesive is used between the aluminium foil and the plastics foil.
For the Applicants, GILL, JENNINGS & EVERY, Chartered Patent Agents, 53 to 64, Chancery Lane, London, WC 2 A IHN.
Printed for Her Maiesty’s Stationery Office, by the Courier Press Leamington Spa, 1980 Published by The Patent Office, 25 Southampton Buildings, London, WC 2 A l AY, from which copies may be obtained.
GB24559/77A
1976-06-14
1977-06-13
Aluminium/plastics laminate foils
Expired
GB1565915A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
CH750176A
CH601016A5
(en)
1976-06-14
1976-06-14
Publications (1)
Publication Number
Publication Date
GB1565915A
true
GB1565915A
(en)
1980-04-23
Family
ID=4326113
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB24559/77A
Expired
GB1565915A
(en)
1976-06-14
1977-06-13
Aluminium/plastics laminate foils
Country Status (7)
Country
Link
US
(1)
US4172914A
(en)
BE
(1)
BE855632A
(en)
CH
(1)
CH601016A5
(en)
DE
(1)
DE2726605A1
(en)
DK
(1)
DK205677A
(en)
GB
(1)
GB1565915A
(en)
SE
(1)
SE433827B
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2654980A1
(en)
*
1989-11-30
1991-05-31
Impressions Continu Sa
Products based on composites which are resistant and inert, process for obtaining them and the composites necessary for their implementation
US5049019A
(en)
*
1979-12-08
1991-09-17
Cmb Foodcan Plc
Methods of making containers
Families Citing this family (21)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2316513C2
(en)
*
1973-04-03
1982-02-25
Robert Bosch Gmbh, 7000 Stuttgart
Lightweight packaging container made of multilayer composite film material
AU529334B2
(en)
*
1978-07-17
1983-06-02
Toyo Seikan Kaisha Ltd.
Laminating plastic film to the surface of metal
US4641005A
(en)
*
1979-03-16
1987-02-03
James River Corporation
Food receptacle for microwave cooking
US4825025A
(en)
*
1979-03-16
1989-04-25
James River Corporation
Food receptacle for microwave cooking
DE3113428A1
(en)
*
1980-08-18
1982-04-01
Schweizerische Aluminium AG, 3965 Chippis
METHOD FOR PRODUCING A METAL-PLASTIC COMPOSITE FILM AND A COMPOSITE FILM PRODUCED BY THE METHOD
JPS6114431Y2
(en)
*
1981-03-10
1986-05-06
JPS6114430Y2
(en)
*
1981-03-10
1986-05-06
US4378069A
(en)
*
1981-04-21
1983-03-29
Magna Technologies, Inc.
Pouch with pour spout
US4878765A
(en)
*
1985-06-03
1989-11-07
Golden Valley Microwave Foods, Inc.
Flexible packaging sheets and packages formed therefrom
US5006383A
(en)
*
1989-06-28
1991-04-09
The Dow Chemical Company
Polymeric blend and laminated structures prepared therefrom
US5302344A
(en)
*
1990-10-31
1994-04-12
Brandeis University
Method for containment of a laboratory chemical
US5236749A
(en)
*
1991-12-02
1993-08-17
Ewing William D
Blister package
DE4236886C2
(en)
*
1992-10-31
1997-11-20
Klocke Verpackungs Service
Containers for aromatic substances
DE9312664U1
(en)
*
1993-08-24
1993-11-25
Hassia Verpackung Ag
Tubular pouch
DE10200925A1
(en)
*
2002-01-12
2003-07-24
Hydro Aluminium Deutschland
Foil for food packaging
US20060285782A1
(en)
*
2005-06-02
2006-12-21
Eileen Walker
Disposable seal and lock foil beverage pouch and the operating machinery to manufacture such product
US8523440B2
(en)
*
2005-06-02
2013-09-03
Bevi Corporation
Disposable seal and lock beverage pouch
DE502006004517D1
(en)
*
2006-06-02
2009-09-24
Constantia Patz Ges M B H
Blister cover film
DE102010038912A1
(en)
*
2010-08-04
2012-02-09
Huhtamaki Ronsberg Zn Der Huhtamaki Deutschland Gmbh & Co. Kg
Bag-on-valve system with a product container for corrosive products, product containers for a bag-on-valve system, film laminate for the production of a product container and use of the film laminate for a bag-on-valve system
US10974855B2
(en)
*
2015-08-04
2021-04-13
Conagra Foods Rdm, Inc.
Shelf-stable pouch for fresh-packed fruits or vegetables
CN112757723A
(en)
*
2021-01-25
2021-05-07
上海华峰新材料研发科技有限公司
Aluminum-plastic composite plate and preparation method and application thereof
Family Cites Families (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3136468A
(en)
*
1962-07-30
1964-06-09
Robert G Keller
Flexible package for sterile foods
NL130914C
(en)
1964-05-26
US3572499A
(en)
*
1967-01-19
1971-03-30
Custom Materials Inc
Conductive packaging material and container for explosives
CH501533A
(en)
*
1967-10-27
1971-01-15
Star Stabilimento Alimentare
Foil-shaped packaging material, process for its manufacture and use of such material to manufacture envelope-type packaging
US3658562A
(en)
*
1969-11-20
1972-04-25
Fmc Corp
Method of purging air from containers
US3616190A
(en)
*
1970-03-23
1971-10-26
Continental Can Co
Laminated heat-sealable sheet having aluminum adhered to a vinyl-chloridecoated regenerated cellulose sheet
JPS5230028B2
(en)
*
1973-02-02
1977-08-05
GB1464718A
(en)
*
1973-05-10
1977-02-16
Grace W R & Co
Laminates containing layers of aluminium and hydrolysed olefin-vinyl ester copolymer
1976
1976-06-14
CH
CH750176A
patent/CH601016A5/xx
not_active
IP Right Cessation
1977
1977-05-11
DK
DK205677A
patent/DK205677A/en
unknown
1977-06-08
US
US05/804,629
patent/US4172914A/en
not_active
Expired – Lifetime
1977-06-13
SE
SE7706825A
patent/SE433827B/en
not_active
IP Right Cessation
1977-06-13
DE
DE19772726605
patent/DE2726605A1/en
not_active
Ceased
1977-06-13
BE
BE178394A
patent/BE855632A/en
not_active
IP Right Cessation
1977-06-13
GB
GB24559/77A
patent/GB1565915A/en
not_active
Expired
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US5049019A
(en)
*
1979-12-08
1991-09-17
Cmb Foodcan Plc
Methods of making containers
FR2654980A1
(en)
*
1989-11-30
1991-05-31
Impressions Continu Sa
Products based on composites which are resistant and inert, process for obtaining them and the composites necessary for their implementation
Also Published As
Publication number
Publication date
DE2726605A1
(en)
1977-12-22
SE433827B
(en)
1984-06-18
CH601016A5
(en)
1978-06-30
DK205677A
(en)
1977-12-15
SE7706825L
(en)
1978-01-26
US4172914A
(en)
1979-10-30
BE855632A
(en)
1977-10-03
Similar Documents
Publication
Publication Date
Title
GB1565915A
(en)
1980-04-23
Aluminium/plastics laminate foils
JP3776936B2
(en)
2006-05-24
Packaging container
EP0842048B1
(en)
2003-06-04
Layer material
CA2067396A1
(en)
1992-02-10
A laminated film with a starchy matrix and low permeability and methods for its production
EP0927624A3
(en)
2002-07-31
Biaxially oriented polyamide resin film and production thereof
GB2103999A
(en)
1983-03-02
Process for packaging materials sensitive to oxygen and/or to water vapour
GB2143471B
(en)
1987-08-12
Multilayer plastics structures and apparatus and methods for their manufacture
CA2118084A1
(en)
1995-04-14
Tubular element for the formation of bags for the vacuum-packing of products
WO2009112172A1
(en)
2009-09-17
Multilayer film for packaging for thermal treatment
DE502007002422D1
(en)
2010-02-04
MULTILAYER FILM AND METHOD FOR THE PRODUCTION THEREOF
KR102068694B1
(en)
2020-01-21
Formation method of Paper-based packaging buffer tray and the buffer tray by this
DE2316513C2
(en)
1982-02-25
Lightweight packaging container made of multilayer composite film material
DE102012102410A1
(en)
2013-09-26
Tray packaging for food
EP0349288B1
(en)
1994-12-28
Heat-resistant composite sheet and container made thereof
JP2006143269A
(en)
2006-06-08
Packaging bag and package using it
EP2233285A1
(en)
2010-09-29
Multilayer film for packaging hard cheese
EP2993036A1
(en)
2016-03-09
film packaging and its process of manufacturing.
ES2174546T3
(en)
2002-11-01
A PROCESS AND A PLANT TO PRODUCE UPHOLSTERY ELEMENTS OF MULTIPLE LAYERS FOR VEHICLES.
JP2570297B2
(en)
1997-01-08
Biaxially stretched composite styrene resin sheet
DE7712756U1
(en)
1977-09-15
Bubble wrap
KR200358318Y1
(en)
2004-08-06
Fabric protecting ultraviolet rays for printing sticker
KR101067507B1
(en)
2011-09-27
Sheet of shopping bag and the embossed shopping bag
CA2431692A1
(en)
2002-06-20
Multiple layer films with defined gas permeability and their use as packaging material, especially as cheese maturing packaging
GB2103542A
(en)
1983-02-23
Packaging materials and packages using it
EP0787582A2
(en)
1997-08-06
Metallized plastic films
Legal Events
Date
Code
Title
Description
1980-07-09
PS
Patent sealed [section 19, patents act 1949]
1993-02-10
PCNP
Patent ceased through non-payment of renewal fee
Effective date:
19920613
