EP0216327A2 - Sachet en plastique pour emballage sous vide - Google Patents

Sachet en plastique pour emballage sous vide Download PDF

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Publication number
EP0216327A2
EP0216327A2 EP86112959A EP86112959A EP0216327A2 EP 0216327 A2 EP0216327 A2 EP 0216327A2 EP 86112959 A EP86112959 A EP 86112959A EP 86112959 A EP86112959 A EP 86112959A EP 0216327 A2 EP0216327 A2 EP 0216327A2
Authority
EP
European Patent Office
Prior art keywords
channels
bag
layers
plastic bag
inner layer
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.)
Granted
Application number
EP86112959A
Other languages
German (de)
English (en)
Other versions
EP0216327B1 (fr
EP0216327A3 (en
Inventor
Hanns J. Kristen
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.)
TILIA INTERNATIONAL
Original Assignee
TILIA TRUST REG
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 TILIA TRUST REG filed Critical TILIA TRUST REG
Priority to AT86112959T priority Critical patent/ATE57880T1/de
Publication of EP0216327A2 publication Critical patent/EP0216327A2/fr
Publication of EP0216327A3 publication Critical patent/EP0216327A3/de
Application granted granted Critical
Publication of EP0216327B1 publication Critical patent/EP0216327B1/fr
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
    • B65D81/18—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 providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2007—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
    • B65D81/2023—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum in a flexible container
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • 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
    • B65D81/18—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 providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2007—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
    • B65D81/2038—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum with means for establishing or improving vacuum

Definitions

  • the invention relates to a plastic bag according to the preamble of claim 1.
  • This plastic bag is intended in particular for vacuum packaging of food.
  • Known plastic bags for this purpose are made of flat plastic films or tubes and have the disadvantage that it is hardly possible to create a vacuum in them by sucking out the air. Because these bags are filled with food, for example with a piece of meat and then from the still open side of the bag a suction nozzle, which is connected to a vacuum pump, inserted into the bag, after a short suction time the opposing walls of the bag will stick together in the area around the suction nozzle. The bag thus seals the tip of the suction nozzle, so that it is no longer possible to pump out the air. So there are air pockets in the bag, so that the packaged food spoils relatively quickly, especially due to the oxygen that is still present inside the bag.
  • the walls of the bag can also lie firmly against the food during suction, so that an intermediate seal takes place there and the air from the rear parts (in the region of the closed end of the bag) cannot be sucked off. Most of the time it can also be observed that the air is not extracted at the corners of the bag.
  • a multi-layer bag is known from US Pat. No. 3,809,217, with a flat outer layer and a meandering inner layer, these two layers being connected to one another. Due to the meandering structure of the inner layer, air pockets are present between the inner and the outer layer, so that this bag is not suitable for vacuum packaging of food. It has been found that the food-compatible plastics such. As polyethylene or polypropylene, are permeable to oxygen, so that at least the oxygen located between the two layers can diffuse into the interior of the bag and the food will spoil. So even if the outer layer is absolutely gas and therefore also is oxygen-tight, the air trapped between the two layers will still spoil the food.
  • the inner layer on the other hand, cannot be made of absolutely air-impermeable material, since all of the absolutely gastight plastics known today are not food-compatible. Incidentally, it is an essential purpose of the bag of US Pat. No. 3,809,217 to provide a relatively rigid packaging for flat objects, which also mechanically protects the packaged object and is intended to prevent the contents of the bag from being felt. For this reason, the bag is not suitable for foods that are usually not flat.
  • a two-layer bag for packaging articles is also known from US Pat. No. 4,093,068.
  • This bag has air cushions that protrude inwards to fix the contents of the packaging. For the above reasons, this bag is also unsuitable for vacuum packaging of food.
  • the object of the invention is to improve the plastic bag of the type mentioned in such a way that the air present in the interior of the bag can be completely sucked out before the vacuum is created.
  • this bag should also be made of food-compatible material and prevent the later penetration of air and especially oxygen.
  • the functional handling of the bag that is to say the creation of the vacuum and the sealing, should be so easy to carry out that these work steps can also be carried out in the normal household.
  • this object is achieved in a bag according to the preamble of claim 1 in that the inner layer 9 is made of thermoplastic material, that the outer layer 11 is made of a gas-impermeable material, that both layers 9 and 11 are connected to one another over the entire area, that at least the inner layer 9 is deformed in such a way that it has depressions or channels 13 on the exposed inside, and that these channels 13 are connected to one another in a grid-like manner.
  • polyethylene is preferably used as the inner layer.
  • Polypropylene is also an option. Both of these plastics are extremely food-resistant, ie there are no chemical reactions between food and these plastics. However, they are not absolutely airtight and in particular allow oxygen to diffuse through. In addition, these materials are usually not boil-proof and have only a comparatively low mechanical strength, so that they can be easily scratched in, which would then remove the vacuum again.
  • Their softening or flow temperature is of the order of 150 ° C to 160 ° C. Polyester is preferably used as the outer layer. Polyamide can also be used. These materials are not food-safe, which means that food that has been in contact with them for a long time will spoil. On the other hand, these materials are absolutely impermeable to oxygen. Your The flow or softening temperature is approx. 80 ° C higher than that of the materials of the inner layer.
  • these two layers are connected to one another over the full area, either by lamination or by coextrusion. So there are no air or oxygen inclusions between the two layers.
  • at least the inner layer, preferably both layers is now deformed or embossed in such a way that it has a multiplicity of channels on the inside of the inner layer, that is to say toward the food. These channels prevent the bag from collapsing completely when aspirated. This means that all the air can be sucked out of the bag without air pockets remaining anywhere.
  • the two layers are preferably deformed in the same direction. This has the advantage that the production of the bag is relatively simple. However, it would also be possible to form the outer layer flat and to provide only the inner layer with projections and depressions, so that only this inner layer has the channels.
  • the channels preferably run in a grid-like manner, that is to say they are connected to one another with regard to air flowing through them during suction.
  • a precisely described exemplary embodiment of the invention shows three sets of channels which run parallel to one another and which intersect. The "elevations" that then remain between these channels then have the shape of a triangle.
  • the channels can also increase with such channels exercises have other forms, such as B. rectangle, circle etc.
  • the bag is made cheaper by the fact that only one wall has the channels, while the other, opposite wall is flat or flat and has no channels.
  • this wall should also consist of two layers in order to achieve food compatibility and oxygen impermeability.
  • Fig. 1 shows the plastic bag 1, in the opening of which a nozzle 3 of a vacuum pump is inserted.
  • This nozzle has a relatively flat mouthpiece, so that the bag 1 in the region by means of clamping jaws 5 arranged on both sides, which consist for example of hard rubber this mouthpiece can be sealed when the jaws are pressed towards each other.
  • the walls of the bag consist of two layers, namely an inner layer 9 made of thermoplastic, which is food-compatible, and an outer layer 11 made of a flexible plastic, which is impermeable to air and, in particular, to oxygen.
  • the inner layer is deformed or embossed in such a way that it has a plurality of interconnected channels 13.
  • the vacuum pump (not shown) is switched on and the air is sucked out of the interior of the bag.
  • a complete collapse of the bag does not occur due to the channels 13, so that the air can be sucked out completely, so that a sufficient vacuum can be generated.
  • the mechanical pressure of the jaws 5 causes the bag to be tightly closed during the suction process.
  • the bag is heat-sealed by pressing down the sealing jaws 7. Thereafter, the jaws 5 and the sealing jaws 7 are removed from the bag and the nozzle 3 is pulled out.
  • the bags can be in the form of individual bags or in the form of a roll.
  • the inner layer 9 is shaped in such a way that it has rectangular projections 15, which in turn are arranged in such a way that continuous and interconnected channels 13 result between them.
  • Fig. 4 shows a further arrangement of projections 15 and channels 13.
  • the projections 15 are formed here as equilateral triangles, so that three sets of channels 13, 13 'and 13 ", which are each parallel to each other, are formed, each at an angle of Cut 60 °.
  • the inner layer 9 is plastically deformed and has regions 17 with a smaller wall thickness and regions 19 with a larger wall thickness alternately, as a result of which the channels 13 are formed.
  • the outer layer 11, on the other hand, is completely flat and fully connected to the likewise flat upper side of the inner layer 9.
  • the opposite wall also consists in this embodiment - similar to the embodiment of FIG. 3 - from two flat layers 9 'and 11'.
  • the inner layer preferably consists of polyethylene, which is food-grade is permanent, but is not absolutely impermeable to oxygen and also not boil-proof and finally has a relatively low strength.
  • the outer layer preferably consists of polyester or polyamide, which has good mechanical strengthening properties, is absolutely impermeable to air and in particular oxygen, but is not absolutely food-safe.
  • the plasticization temperature of the outer layer is of the order of magnitude of 240 ° C, while that of the inner layer is of the order of 150 ° C to 160 ° C. The temperature difference between the plasticizing temperature between the inner and outer layer is therefore approx. 80 ° C. If the outer layer is heated with the sealing jaws 7, this also heats the inner layer, which is then welded. Due to the higher plasticization and thus also melting temperature of the outer layer, there is also no danger that areas of the bag melt during sealing to such an extent that there are holes in them.
  • the total thickness of layers 9 and 11 of a wall is between 67 and 100 ⁇ m.
  • the outer layer has a thickness of the order of 12 to 15 microns, while the rest falls on the inner layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
EP19860112959 1985-09-23 1986-09-19 Sachet en plastique pour emballage sous vide Expired - Lifetime EP0216327B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86112959T ATE57880T1 (de) 1985-09-23 1986-09-19 Kunststoffbeutel zur vakuumverpackung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77887585A 1985-09-23 1985-09-23
US778875 1985-09-23

Publications (3)

Publication Number Publication Date
EP0216327A2 true EP0216327A2 (fr) 1987-04-01
EP0216327A3 EP0216327A3 (en) 1988-08-03
EP0216327B1 EP0216327B1 (fr) 1990-10-31

Family

ID=25114656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860112959 Expired - Lifetime EP0216327B1 (fr) 1985-09-23 1986-09-19 Sachet en plastique pour emballage sous vide

Country Status (4)

Country Link
EP (1) EP0216327B1 (fr)
AT (1) ATE57880T1 (fr)
DE (1) DE3675310D1 (fr)
HK (1) HK26595A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008070A2 (fr) * 1989-01-13 1990-07-26 INDAG Gesellschaft für Industriebedarf mbH Sachet en plastique
EP0648688A2 (fr) * 1993-10-13 1995-04-19 FLAEM NUOVA S.p.A. Elément tubulaire pour la fabrication de sachets pour l'emballage sous-vide
DE29505187U1 (de) * 1995-03-28 1995-07-20 David Stephan Beutel für Vakuum-Verpackungsmaschinen
EP1999028A2 (fr) * 2006-03-14 2008-12-10 Scholle Corporation Sac repliable pour la distribution de liquides et procede correspondant
DE102011101177A1 (de) * 2011-05-11 2012-11-15 Jura-Plast Gmbh Beutel
CN113788218A (zh) * 2021-08-13 2021-12-14 张敏 一种食品包装袋

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1761403A1 (de) * 1967-05-18 1971-07-01 Natron Papier Ind Gmbh Verpackungsmaterial,insbesondere fuer Saecke,sowie Verfahren und Einrichtung zu seiner Herstellung
DE2332927A1 (de) * 1972-06-30 1974-01-10 Jintan Terumo Co Verpackung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1761403A1 (de) * 1967-05-18 1971-07-01 Natron Papier Ind Gmbh Verpackungsmaterial,insbesondere fuer Saecke,sowie Verfahren und Einrichtung zu seiner Herstellung
DE2332927A1 (de) * 1972-06-30 1974-01-10 Jintan Terumo Co Verpackung

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5433526A (en) * 1989-01-13 1995-07-18 Indag Gesellschaft Fur Industriebedarf Mbh Flexible bag
EP0383020A2 (fr) * 1989-01-13 1990-08-22 Indag Gesellschaft Für Industriebedarf Mbh Sac
WO1990008070A3 (fr) * 1989-01-13 1990-09-07 Indag Gmbh Sachet en plastique
EP0383020A3 (en) * 1989-01-13 1990-11-22 Indag Gesellschaft Fur Industriebedarf Mbh Plastic bag
WO1990008070A2 (fr) * 1989-01-13 1990-07-26 INDAG Gesellschaft für Industriebedarf mbH Sachet en plastique
EP0648688A2 (fr) * 1993-10-13 1995-04-19 FLAEM NUOVA S.p.A. Elément tubulaire pour la fabrication de sachets pour l'emballage sous-vide
EP0648688A3 (fr) * 1993-10-13 1995-06-21 Flaem Nuova Spa Elément tubulaire pour la fabrication de sachets pour l'emballage sous-vide.
DE29505187U1 (de) * 1995-03-28 1995-07-20 David Stephan Beutel für Vakuum-Verpackungsmaschinen
EP1999028A2 (fr) * 2006-03-14 2008-12-10 Scholle Corporation Sac repliable pour la distribution de liquides et procede correspondant
EP1999028A4 (fr) * 2006-03-14 2011-01-12 Scholle Corp Sac repliable pour la distribution de liquides et procede correspondant
DE102011101177A1 (de) * 2011-05-11 2012-11-15 Jura-Plast Gmbh Beutel
CN113788218A (zh) * 2021-08-13 2021-12-14 张敏 一种食品包装袋
CN113788218B (zh) * 2021-08-13 2023-09-29 平江县向阳实业有限公司 一种食品包装袋

Also Published As

Publication number Publication date
HK26595A (en) 1995-03-10
EP0216327B1 (fr) 1990-10-31
DE3675310D1 (de) 1990-12-06
ATE57880T1 (de) 1990-11-15
EP0216327A3 (en) 1988-08-03

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