EP0463071B1 - Verpackungsmaterial - Google Patents
Verpackungsmaterial Download PDFInfo
- Publication number
- EP0463071B1 EP0463071B1 EP19900905189 EP90905189A EP0463071B1 EP 0463071 B1 EP0463071 B1 EP 0463071B1 EP 19900905189 EP19900905189 EP 19900905189 EP 90905189 A EP90905189 A EP 90905189A EP 0463071 B1 EP0463071 B1 EP 0463071B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- bag
- light reflecting
- packing material
- metal coating
- 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.)
- Expired - Lifetime
Links
Images
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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
- B65D81/30—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants by excluding light or other outside radiation
Definitions
- the present invention concerns a packing material, preferably in the form of a bag, which is intended for packaging potatoes and similar light-sensitive vegetable products, as set out in the preamble of claim 1.
- Bags of strong paper yield a relatively good protection against irradiation, but have several drawbacks limiting their use. Paper bags are injurous to the environment, and they give waste problems and require rather large amounts of energy in the production. Finally, paper is non-transparent, which prevents inspection of the article without opening the bag. It would be obvious to use bags of non-toxic and inexpensive plastics materials, such as polyethylene, polypropylene, but these materials are transparent in their non-coloured state and provide no protection against UV light. To obtain effective light protection the plastics sheet would have to be dyed with large amounts of light absorbing colouring matters or be coated with a strong layer of a light reflecting metallic layer, such as of aluminium, which would make the package very expensive.
- a light reflecting metallic layer such as of aluminium
- the EP-A-209 002 discloses a packing material intended for wrapping light-sensitive photografic material. For this purpose it is necessary to obtain complete protection of the contents from any light influence. This has been obtained by using a laminate of several plastics sheets and an intermediate metallic layer. At least one of the plastics sheets is strongly dyed with a dark covering colouring matter or pigment.
- the known packing material thus described is very expensive because large amounts of light protecting materials have to be used.
- the present invention is based on the finding that both effective and inexpensive light protection of potatoes and similar vegetable products can be obtained by using a plastics sheet or a laminate of plastics sheets provided with a combination of light reflecting metal layers in the form of metal particles suspended in a binder, and one or more light absorbing substances in relatively small amounts or concentration.
- the invention concerns a packing material as defined in claim 1.
- the packing material is shaped as a bag intended for packaging potatoes and similar light-sensitive vegetable products, one of the sides being provided with the light reflecting and light absorbing materials, while the other side is transparent or has transparent areas.
- Such a bag can be placed with the transparent side downwardly and the light-protecting side upwardly or against the light and will thus provide full protection against light influences.
- a customer in a shop can pick up the bag and inspect the contents through the transparent side.
- the transparent area can expediently be provided as a window, which just forms part of one side.
- the contents of the bag will thus be protected against light hitting the other side of the bag, the edges and the bottom.
- the present bag can be manufactured by means of traditional machinery for sheet production. It is preferred first to apply the light absorbing material to the sheet or specific areas of the sheet by printing, e.g. offset printing. Then the light reflecting material is applied in the form of metal particles suspended in a binder; said light reflecting material can also be applied by printing or in another manner, such as by electrode sputtering if the light reflecting material is aluminium. The best light protection is obtained when the light reflecting materials are arranged outermost.
- an essential feature of the invention resides in adapting the amounts of light absorbing and light reflecting materials, respectively, in such a manner as to provide a light protecting effect which is just sufficient with the least possible amount of material.
- a skilled person can, by simple experiments, find precisely the amount and the mutual proportion between light reflecting and light absorbing materials which are optimum, i.e. offer sufficient light protection with the lowest possible costs.
- the light absorbing material may be a colouring matter soluble in the plastics material or a combination of several colouring matters, e.g. with absorption maximum in the various regions of the spectrum.
- the combination should also incorporate materials with absorption maximum in the ultraviolet light, e.g. in the region 300-400 nm, since this light is particularly dangerous for potatoes.
- carbon black is useful as light absorbing material.
- the light reflecting material is preferably aluminium, e.g. in the form of metal particles suspended in a binder. Instead of aluminium, silver might have been used, but this is not as economical as aluminium.
- the bag shown in fig. 1 is made of a transparent plastics sheet, e.g. of biaxially stretched polyethylene.
- the sheet is bent around an edge 7 and welded in the bottom with a welding seam 3 and along the opposite edge likewise with a welding seam 1. This results in an opening 2.
- the bag is moreover provided with two layers of light protecting material 5, 8 by offset printing, viz. first a light absorbing colouring matter and on top of this a layer containing metallic aluminium pigment. An area on one side is kept free and forms a transparent window 4.
- the light protecting materials around the window 4 form a frame 8.
- the amount of the light absorbing colouring matter and of the light reflecting aluminium pigment, respectively, is adapted following experiments to provide the least possible amount offering the desired protection.
- the bag might also be manufactured by extrusion in tubular shape. Then, a welding seam 3 in the bottom of the bag will suffice.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Wrappers (AREA)
- Bag Frames (AREA)
- Packages (AREA)
- Laminated Bodies (AREA)
Claims (3)
- Verpackungsmaterial zum Schutz von Kartoffeln und ähnlich lichtempfindlichen Gemüsepflanzen vor UV-Licht, mit zumindest einer Kunststoffolie, zumindest einem lichtreflektierenden Metallüberzug, der auf die Oberfläche der Kunststoffolie oder einer dieser Folien aufgebracht wird, und zumindest einem lichtabsorbierenden Farbstoff, der in die Kunststoffolie bzw. eine dieser Folien eingearbeitet ist, dadurch gekennzeichnet, daß der lichtreflektierende Metallüberzug in Form von Metallteilchen aufgetragen wird, die in einem Bindemittel suspendiert sind, daß die Dicke bzw. die Dichte des lichtreflektierenden Metallüberzugs so ausgelegt ist, daß nur ein Teil des einfallenden Lichts reflektiert wird, und daß der lichtabsorbierende Farbstoff je nach Art des Farbstoffs in so einer Menge auf zumindest eine der Kunststoffolien aufgetragen bzw. in diese eingearbeitet wird, daß ein beträchtlicher Teil des UV-Lichts, der nicht von dem Metallüberzug reflektiert wird, von dem Farbstoff absorbiert wird.
- Verpackungsmaterial nach Anspruch 1, dadurch gekennzeichnet, daß es wie ein Beutel geformt ist, wobei eine Seite davon mit den lichtreflektierenden und lichtabsorbierenden Materialien versehen ist, und die andere Seite durchsichtig ist oder teilweise mit den lichtreflektierenden und lichtabsorbierenden Materialien derart versehen ist, daß diese andere Seite durchsichtige Flächen aufweist.
- Verpackungsmaterial nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Metallüberzug eine aufgetragene Aluminiumschicht ist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT90905189T ATE98189T1 (de) | 1989-03-15 | 1990-03-14 | Verpackungsmaterial. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK1242/89 | 1989-03-15 | ||
DK124289A DK124289A (da) | 1989-03-15 | 1989-03-15 | Plastpose med bestemt farvedaekning til beskyttelse af kartofler mod belysning |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0463071A1 EP0463071A1 (de) | 1992-01-02 |
EP0463071B1 true EP0463071B1 (de) | 1993-12-08 |
Family
ID=8102610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900905189 Expired - Lifetime EP0463071B1 (de) | 1989-03-15 | 1990-03-14 | Verpackungsmaterial |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0463071B1 (de) |
AU (1) | AU5338890A (de) |
DE (1) | DE69005103T2 (de) |
DK (2) | DK124289A (de) |
ES (1) | ES2050433T3 (de) |
WO (1) | WO1990010580A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2316669A (en) * | 1996-08-30 | 1998-03-04 | Jiffy Packaging Co Ltd | Heat reflective and impact resistant protective bag |
ES2364478B1 (es) * | 2010-02-12 | 2012-09-13 | Unique Size España, S.L | Procedimiento para el envasado y la conservacion de frutas y verduras cortadas y productos obtenidos segun tal procedimiento |
IT1404090B1 (it) * | 2011-01-31 | 2013-11-08 | Rotografica Vicentina S R L | Articolo promozionale per il confezionamento di bottiglie di bevande fotodegradabili |
WO2012168494A1 (es) | 2011-06-06 | 2012-12-13 | Palacios Gazules, Sergio | Procedimiento para el envasado y conservación de cítricos cortados y productos obtenidos según dicho procedimiento |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3702157A1 (de) * | 1986-12-20 | 1988-06-30 | Aluminium Walzwerke Singen | Verpackung fuer fluessige licht- und sauerstoffempfindliche praeparate |
-
1989
- 1989-03-15 DK DK124289A patent/DK124289A/da not_active Application Discontinuation
-
1990
- 1990-03-14 ES ES90905189T patent/ES2050433T3/es not_active Expired - Lifetime
- 1990-03-14 AU AU53388/90A patent/AU5338890A/en not_active Abandoned
- 1990-03-14 DK DK90905189T patent/DK0463071T3/da active
- 1990-03-14 DE DE69005103T patent/DE69005103T2/de not_active Expired - Fee Related
- 1990-03-14 EP EP19900905189 patent/EP0463071B1/de not_active Expired - Lifetime
- 1990-03-14 WO PCT/DK1990/000070 patent/WO1990010580A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
ES2050433T3 (es) | 1994-05-16 |
DE69005103T2 (de) | 1994-09-29 |
DK124289A (da) | 1989-09-07 |
AU5338890A (en) | 1990-10-09 |
WO1990010580A1 (en) | 1990-09-20 |
DK124289D0 (da) | 1989-03-15 |
DK0463071T3 (da) | 1994-04-18 |
EP0463071A1 (de) | 1992-01-02 |
DE69005103D1 (de) | 1994-01-20 |
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