EP0463071B1 - A packing material - Google Patents

A packing material Download PDF

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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
Application number
EP19900905189
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0463071A1 (en
Inventor
Henning Christiansen
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.)
Individual
Original Assignee
Individual
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=8102610&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0463071(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to AT90905189T priority Critical patent/ATE98189T1/de
Publication of EP0463071A1 publication Critical patent/EP0463071A1/en
Application granted granted Critical
Publication of EP0463071B1 publication Critical patent/EP0463071B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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)
EP19900905189 1989-03-15 1990-03-14 A packing material Expired - Lifetime EP0463071B1 (en)

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
DK124289A DK124289A (da) 1989-03-15 1989-03-15 Plastpose med bestemt farvedaekning til beskyttelse af kartofler mod belysning
DK1242/89 1989-03-15

Publications (2)

Publication Number Publication Date
EP0463071A1 EP0463071A1 (en) 1992-01-02
EP0463071B1 true EP0463071B1 (en) 1993-12-08

Family

ID=8102610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900905189 Expired - Lifetime EP0463071B1 (en) 1989-03-15 1990-03-14 A packing material

Country Status (6)

Country Link
EP (1) EP0463071B1 (da)
AU (1) AU5338890A (da)
DE (1) DE69005103T2 (da)
DK (2) DK124289A (da)
ES (1) ES2050433T3 (da)
WO (1) WO1990010580A1 (da)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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
PL444012A1 (pl) * 2023-03-08 2024-09-09 Uniwersytet Przyrodniczo-Humanistyczny W Siedlcach Opakowanie na ziemniaki

Family Cites Families (1)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
EP0463071A1 (en) 1992-01-02
ES2050433T3 (es) 1994-05-16
DK0463071T3 (da) 1994-04-18
AU5338890A (en) 1990-10-09
WO1990010580A1 (en) 1990-09-20
DE69005103D1 (de) 1994-01-20
DE69005103T2 (de) 1994-09-29
DK124289A (da) 1989-09-07
DK124289D0 (da) 1989-03-15

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