NZ550063A - Windable film for the production of a packaging - Google Patents

Windable film for the production of a packaging

Info

Publication number
NZ550063A
NZ550063A NZ550063A NZ55006305A NZ550063A NZ 550063 A NZ550063 A NZ 550063A NZ 550063 A NZ550063 A NZ 550063A NZ 55006305 A NZ55006305 A NZ 55006305A NZ 550063 A NZ550063 A NZ 550063A
Authority
NZ
New Zealand
Prior art keywords
film
sealing regions
sealing
regions
film according
Prior art date
Application number
NZ550063A
Inventor
Andreas Michalsky
Original Assignee
Huhtamaki Ronsberg
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34982148&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NZ550063(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Huhtamaki Ronsberg filed Critical Huhtamaki Ronsberg
Publication of NZ550063A publication Critical patent/NZ550063A/en

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
    • 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
    • B32B7/02—Physical, chemical or physicochemical 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
    • 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
    • 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
    • B32B7/06—Interconnection of layers permitting easy separation
    • 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
    • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/02—Wrappers or flexible covers
    • B65D65/14—Wrappers or flexible covers with areas coated with adhesive
    • 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)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Replacement Of Web Rolls (AREA)
  • Packages (AREA)

Abstract

A windable film, for the production of a packaging, preferably for food. The film comprises sealing regions, at least in part sections of the film, whereby the film has a multi-layer embodiment and the sealing regions on one side of the film exhibit different adhesive properties. The sealing regions are defined by first self-opposing sealable, in particular, outer-outer sealing regions and second, in particular inner-outer sealable sealing regions, whereby the first sealing regions have a greater thickness and/or area coverage than the second sealing regions.

Description

550063 Rollable film for the production of a packaging Description The invention relates to a rollable film for the production of a packaging in accordance with the precharacterising clause of patent claim 1.
Films used for the production of a packaging are usually available in the form of blanks which are either manufactured as such or are separable from a film web.
The latter variant, namely the provision of a roll of film which is generally wound onto a reel, has numerous advantages over the first alternative, primarily resulting from the ability of a film web to be produced effectively and efficiently as well as the improved handling ability of such a film web for further processing at a later stage.
In order to be able to produce a packaging from a film it is necessary for the film web first to be divided into predetermined film blank portions. Thereafter, sub-regions, especially the edges, of the blanks are brought into contact with one another and bonded in order thus to form a closed packaging. In order that the desired portions of the film can be joined together more easily there is frequently used a sealing technique which enables the desired portions of the film to be sealed in a troublefree and simple manner. Adhesive sealing, for example, is used for that purpose.
A problem that has arisen, however, is that film webs that have been prepared for such sealing have a tendency to stick to one another in layers, i.e. to block, as soon as they are laid one on top of another or, preferably, are wound onto a reel. This risk of blocking is further increased by elevated temperature, and the blocking can be so severe that the film web wound onto the reel can no longer be unwound and thus becomes unusable.
One of the main reasons for the occurrence of this problem is the necessity for the film blank produced from the film web to exhibit inside/outside sealability, which means in practice that an upper side of the film is sealed to an underside of the film. Such an arrangement of upper sides and undersides is inevitably provided by 550063 a rolled-up film, however, which in the prior art frequently results in premature and undesirable "sealing" on the reel.
It is therefore an object of the present invention to provide an improved rollable film 5 for the production of a packaging; or at least to provide the public with a useful choice.
This object is achieved by a rollable film for the production of a packaging in accordance with patent claim 1.
In particular, the aim is achieved by a rollable film for the production of a packaging, 10 especially for foodstuffs, having sealing regions provided at least in sub-regions of the film, the film having a multi-layered structure and/or being provided with colorants, especially varnishes, for example "textured" varnishes, and the sealing regions of a side of the film having varied adhesion properties.
An important aspect of the invention is that the sealing regions on a side of the film 15 are so matched to one another in respect of their adhesion properties that extensive sealing between an upper side of a film web and a lower side of a further film web located above is minimized or totally avoided.
According to the invention, the sealing regions having varied adhesion properties are defined by first sealing regions which are scalable to one another, especially 20 outside/outside sealable, and by second sealing regions, especially inside/outside sealable sealing regions.
The first sealing regions, that is to say the outside/outside sealable sealing regions, are arranged substantially along the length of the film and cover a greater surface area than the second sealing regions and are non-blocking with respect to the inner 25 side of the film. By virtue of their relatively large and linear arrangement in the machine direction, the winding pressure that builds up in those regions is greater than in the remaining regions of the film.
The second sealing regions are located according to the invention in a region of the film in which they do not overlap with the first sealing regions. This is especially the INTELLECTUAL PROPERTY OFFICE 30 OF N.Z. 2 5 JAN 2007 550063 case when the film, which is preferably in the form of a film web, is rolled up or wound onto a reel. In that case, the second sealing regions will not overlap with the first sealing regions also seen over the cross-section of the roll, so that the second sealing regions will not cause a build-up in thickness relative to the remaining 5 surface of the film on the reel.
According to the invention, the surface area covered by the second sealing regions relative to the total surface area of the film is less than 5 %, preferably less than 3.8 % and especially less than 2.5 %. In this way it is ensured that the second 10 sealing regions applied to the film, which are inside/outside sealable and could result in the rolled-up film webs' becoming stuck together, are only very small, so that the risk of extensive blocking is minimized or eliminated.
Furthermore, according to the invention the first sealing regions are thicker than the 15 second sealing regions, which can be realized simply by applying different amounts of a sealing medium. Alternatively and/or in addition, the surface area covered by the first sealing regions can be significantly greater, that is to say by a factor of from 3 to 30 times, than that of the second sealing regions.
By virtue of their greater thickness and/or the substantially greater surface area covered by the first sealing regions in comparison with the second sealing regions, as the film web is being rolled up there is a build-up in thickness in the region of the first sealing regions extending substantially linearly along the length of the film. It should be emphasized at this point that the first sealing regions can also be 25 arranged in a curving shape or in the form of dots or spots along the length of the film web and can otherwise be arranged in accordance with the sealing surface required. The important feature that is to be observed according to the invention is that the first sealing regions come to lie one above another when the film web is being rolled up and form a main pattern that supports the film web in the transverse 30 direction.
Because the second sealing regions are thinner and/or cover a substantially smaller surface area than the first sealing regions, the difference in the thickness of the first sealing regions relative to the second sealing regions serves as it were as 35 a spacer during the rolling-up of the film web, so that the upper side of a lower film 550063 web does not come into direct contact with the undersides of an upper film web, or does so only with a significantly reduced contact pressure, and accordingly those two film layers cannot unintentionally become stuck together. It should be noted that even in the event of the upper side of a lower film web coming into contact with 5 the underside of an upper film web, by virtue of the increased thickness of the main pattern there is no risk of the two layers becoming firmly stuck together because, as a result of their reduced thickness, the second sealing regions are not subjected to winding pressure in the roll and the second sealing regions are thus relieved of load.
According to the invention, the second sealing regions extend substantially in the transverse direction, that is to say at a right angle or obliquely relative to the longitudinal extent of the film. The second sealing regions are of substantially linear form, which means merely the general alignment of the second sealing regions. In principle, these second sealing regions can also have a wavy, zig-zag or dotted shape and extend in some other way transversely to the longitudinal extent of the film.
By virtue of the substantially linear form of the second sealing regions, when the 20 film is being rolled up the second sealing regions come to rest on different locations over the radius and around the circumference as a result of the increasing diameter of the roll during the rolling, so that a build-up in thickness caused by the second sealing regions' lying one above another and the associated winding pressure that would act on the second sealing regions does not occur according to the invention.
In that respect, an important aspect of the invention is that the inside/outside sealable second sealing regions are separated from one another by the spacing between the film webs having the second sealing regions. This spacing is brought about by the greater thickness of the first sealing regions relative to that of the 30 second sealing regions.
Accordingly, the main roll-supporting pattern, which is formed by the first sealing regions in the rolled state, is provided with an outside/outside sealable material having no blocking effect, whereas the second sealing regions, which cover a 550063 maximum surface area of 5 %, are inside/outside sealable, but are arranged one above another, without pressure, irregularly over the circumference of the roll.
The materials used according to the invention are predominantly oriented poly-5 propylene and polyethylene films.
The film according to the invention is advantageously in the form of a film that is printed on its outer surface, i.e. face-printed, only the front side of the film being printed. It should be mentioned at this point that the printing or coating process as 10 well as its basic principles are also applicable to the inner side or an underside of a film. Furthermore, it should be noted that the film is preferably in the form of a laminate, it also being possible for some of the laminate layers to be printing layers or sealing layers.
Further embodiments of the invention will be found in the subsidiary claims.
The invention will be described below with reference to an exemplary embodiment which is explained in greater detail with reference to one Figure: Fig. 1 is a diagrammatic representation of a rollable film according to the invention in accordance with an embodiment.
In the description which follows, parts that are the same or have the same effect have been given the same reference numerals.
Fig. 1 shows a rollable film 10 which is shown with its longitudinal extent running from top to bottom in the drawing. The film is in the form of a symmetrical double film for simultaneous production of two packagings, which can be divided along its centre line to form two identical films which can then be cut to length. Along its 30 length, the film 10 has first sealing regions 21 on each side of the centre line 30 and along its side edges 40. Linear second sealing regions 22 extend at a right angle to those first sealing regions 21. The first sealing regions 21 have a larger amount of sealable dispersion varnish applied and accordingly rise to a greater height out of the plane of the drawing than the second sealing regions 22, so that 35 when the film 10 is wound onto a reel (not shown) a main pattern of first sealing 550063 regions 21 lying one above another is formed and the film 50 located between the first sealing regions is arranged slightly spaced apart from adjacent film web layers located underneath. This is likewise true of the second sealing regions 22.
In summary, it should be mentioned that the spaced arrangement of the film regions between the first sealing regions in the rolled-up state prevents those regions 50 becoming stuck together. This is true especially in the case of elevated temperatures, which would render conventional film webs unusable.
It should be pointed out here that all the above-described components, alone and in any combination, especially the details shown in the drawing, are claimed as being important to the invention. Modifications thereof will be familiar to the person skilled in the art.
List of reference numerals film 21 first sealing regions 22 second sealing regions centre line 40 side edge 50 regions between first sealing regions

Claims (15)

  1. 550063 Received at IPONZ on 19 June 2009 -7- Rollable film for the production of a packaging Patent Claims Rollable film for the production of a packaging, especially for foodstuffs, having sealing regions provided at least in sub-regions of the film, characterized in that the film has a multi-layered structure and the sealing regions of a side of the film have varied adhesion properties.
  2. Film according to claim 1, characterized in that the sealing regions having varied adhesion properties are defined by first sealing regions which are outside/outside sealable to one another, and by second sealing regions which are inside/outside sealable to one another.
  3. Film according to claim 2, characterized in that the first sealing regions are arranged substantially along the length of the film, and the second sealing regions are arranged in a region of the film that does not overlap with the first sealing regions.
  4. Film according to either one of claims 2 and 3, characterized in that the first sealing regions have a dispersion varnish.
  5. Film according to claim 4, characterized in that the dispersion varnish is an acrylate-based dispersion varnish. 550063 Received at IPONZ on 19 June 2009 -8-
  6. 6. Film according to either one of claims 2 and 3, characterized in that the second sealing regions have a dispersion varnish. 5
  7. 7. Film according to claim 6, characterized in that the dispersion varnish is a dispersion varnish based on ethyl vinyl acetate.
  8. 8. Film according to any one of claims 2 to 7, characterized in that 10 the first sealing regions are thicker and/or cover a greater surface area than the second sealing regions.
  9. 9. Film according to any one of claims 2 to 8, characterized in that the first sealing regions, to avoid inside/outside sealing, are provided with 15 colorant, varnish, textured varnish, and/or anti-adhesion agents.
  10. 10. Film according to any one of claims 2 to 9, characterized in that the second sealing regions cover a surface area of less than 5% relative to the total surface area of the film. 20
  11. 11. Film according to any one of claims 2 to 9, characterized in that the second sealing regions cover a surface area of less than 3.8% relative to the total surface area of the film.
  12. 12. Film according to any one of claims 2 to 9, 25 characterized in that the second sealing regions cover a surface area of less than 2.5% relative to the total surface area of the film. 550063 Received at IPONZ on 19 June 2009 -9-
  13. 13. Film according to any one of claims 2 to 12, characterized in that the first sealing regions are non-blocking with respect to an inner side or a lower side of the film.
  14. 14. Film according to any one of claims 2 to 13 characterized in that the second sealing regions seal selectively only inside/outside.
  15. 15. A rollable film for the production of a packaging as claimed in claim 1, substantially as herein described with reference to the accompanying drawing. Pipers Attorneys for HUHTAMAKI RONSBERG, ZWEIGNIEDERLASSUNG DER HUHTAMAKIDEUTSCHLAND GMBH & CO. KG
NZ550063A 2004-04-02 2005-03-18 Windable film for the production of a packaging NZ550063A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004016370 2004-04-02
DE102004062600A DE102004062600A1 (en) 2004-04-02 2004-12-24 Windable film for producing a packaging
PCT/EP2005/002916 WO2005097489A2 (en) 2004-04-02 2005-03-18 Windable film for the production of a packaging

Publications (1)

Publication Number Publication Date
NZ550063A true NZ550063A (en) 2009-07-31

Family

ID=34982148

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ550063A NZ550063A (en) 2004-04-02 2005-03-18 Windable film for the production of a packaging

Country Status (12)

Country Link
EP (1) EP1729960B2 (en)
AT (1) ATE396043T1 (en)
AU (1) AU2005231580A1 (en)
DE (2) DE102004062600A1 (en)
ES (1) ES2307153T5 (en)
GT (1) GT200500076A (en)
NO (1) NO20064618L (en)
NZ (1) NZ550063A (en)
PL (1) PL1729960T5 (en)
RU (1) RU2355581C2 (en)
UA (1) UA83901C2 (en)
WO (1) WO2005097489A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012028202A1 (en) * 2010-09-03 2012-03-08 Henkel Ag & Co. Kgaa Sealable multilayer film for packing materials

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1395181A (en) * 1972-01-12 1975-05-21 Dickinson Co Ltd John Sealing strips used on bags, envelopes or bands
DE4319023C1 (en) * 1993-06-01 1994-09-29 Neschen Hans Gmbh & Co Kg Pressure-sensitive, unsupported, double-sided adhesive tape, and use of a polyacrylic ester contact adhesive for its preparation
EP0837010A1 (en) † 1996-10-08 1998-04-22 Transpac, N.V. Wrapper for confectionery and method for its manufacture
FR2761960B1 (en) * 1997-04-09 1999-05-28 Pechiney Emballage Flexible Eu POLYOLEFIN-BASED FILM FOR FORMING A FOLDING PACKAGE
EP0891930A1 (en) * 1997-07-17 1999-01-20 Alusuisse Technology & Management AG Sheet wrapping material
DE10221143B4 (en) * 2002-05-11 2005-03-24 Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg plastic film

Also Published As

Publication number Publication date
ES2307153T3 (en) 2008-11-16
ATE396043T1 (en) 2008-06-15
PL1729960T3 (en) 2008-11-28
RU2006138434A (en) 2008-05-10
ES2307153T5 (en) 2013-03-14
DE502005004190D1 (en) 2008-07-03
EP1729960B2 (en) 2012-10-24
AU2005231580A1 (en) 2005-10-20
WO2005097489A3 (en) 2005-12-29
GT200500076A (en) 2009-06-19
PL1729960T5 (en) 2013-02-28
EP1729960B1 (en) 2008-05-21
UA83901C2 (en) 2008-08-26
RU2355581C2 (en) 2009-05-20
EP1729960A2 (en) 2006-12-13
DE102004062600A1 (en) 2005-10-27
WO2005097489A2 (en) 2005-10-20
NO20064618L (en) 2006-10-10

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