EP2653403B1 - Bag for the containing of liquid products emanating gas, in particular yeast - Google Patents

Bag for the containing of liquid products emanating gas, in particular yeast Download PDF

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Publication number
EP2653403B1
EP2653403B1 EP13163611.0A EP13163611A EP2653403B1 EP 2653403 B1 EP2653403 B1 EP 2653403B1 EP 13163611 A EP13163611 A EP 13163611A EP 2653403 B1 EP2653403 B1 EP 2653403B1
Authority
EP
European Patent Office
Prior art keywords
bag
film
nonwoven fabric
polyethylene
outer film
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.)
Active
Application number
EP13163611.0A
Other languages
German (de)
French (fr)
Other versions
EP2653403A1 (en
Inventor
Franco Goglio
Giorgio Bottini
Luca Fantoni
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.)
Goglio SpA
Original Assignee
Goglio SpA
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 Goglio SpA filed Critical Goglio SpA
Priority to PL13163611T priority Critical patent/PL2653403T3/en
Publication of EP2653403A1 publication Critical patent/EP2653403A1/en
Application granted granted Critical
Publication of EP2653403B1 publication Critical patent/EP2653403B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
    • 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
    • B65D31/04—Bags or like containers made of paper and having structural provision for thickness of contents with multiple 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861—Spouts
    • B65D75/5872—Non-integral spouts
    • B65D75/5877—Non-integral spouts connected to a planar surface of the package wall

Definitions

  • the object of the present invention is a bag for the containing of liquid products which emanate gas, in particular yeasts for bread making.
  • yeast In the following description specific reference will be made to yeast, but it is to be understood that the invention can be applied to any liquid or paste product which during storage emanates gas.
  • Yeast in the phase of production, is always in the liquid state and, for the placing on the market, in the majority of cases, is subsequently dehydrated in order to transform it into powder or into the form of solid cakes. In the phase of use the yeast has once again to be returned to the liquid form.
  • the problem in the storage of the liquid yeast is that it emanates a considerable quantity of gas, in particular CO 2 up to 1/3 litres a day for a package of 10/20 litres.
  • Bags are therefore necessary which on the one hand are highly permeable to the gases and on the other hand have adequate toughness for sustaining the weight of the content, these bags normally having a capacity of 10/20 litres.
  • double wall bags i.e. having a polyethylene-based inner film highly permeable to CO 2 , with very thin thickness (30-50 ⁇ m) and therefore with little mechanical strength, and an outer film constituted by a nylon-based laminate, with thickness of 80-150 ⁇ m, suitable for conferring the necessary mechanical strength to the bag.
  • the outer film which is not permeable, has a plurality of small holes to allow the release of the gases which permeate through the inner film.
  • the bag shaped in this way is placed inside a cardboard box in such a way as to constitute a so-called bag-in-box packaging which can easily be manipulated.
  • This pressure contact causes a strong adherence between the inner and outer plastic films of the bag, practically clogging the holes provided in the outer film and preventing therefore the release of the gases, which tend to accumulate in the upper part of the bag, where they have difficulty in exiting due to the small perforated surface of the outer film not in contact with the inner wall of the containing box.
  • the object of the invention is that of eliminating the aforesaid disadvantages of the prior art.
  • an object of the invention is that of providing a bag for liquid yeasts which allows a complete and rapid degassing of the product contained therein.
  • Another object of the present invention is that of providing such a bag which is simple and economical to manufacture.
  • the bag according to the invention has the features of the annexed independent claim 1.
  • the bag according to the invention comprises a polyethylene-based inner film with high permeability and a reinforcing outer film, wherein the outer film is a nonwoven fabric of polyethylene-based fibres, so as to be sealable to the inner film.
  • the fibres of the nonwoven fabric of the outer film are constituted by a mixture of polypropylene and polyethylene (PP/PE), with a weight of 60-85 g/m 2 .
  • bag 1 has been illustrated rectangular in shape, which is the simplest to make, but it is clear that it can take on any other shape.
  • the bag 1 is of the so-called double wall type, in the sense that each of its two opposite faces 2 comprises two films, an inner one 5 and an outer one 6, separated one from the other and joined only at said perimeter heat-sealing line 3.
  • a spout 7 for filling/delivering of the product is applied, having a circular flange 8 sealed internally to the corresponding face 2, while the spout 7 projects through a hole formed in this face, and is closed by a cap 9.
  • the inner film 5 of the double wall of the bag is with high permeability to gases, in particular to CO 2 which is produced in a large quantity by the yeast contained in the bag, > 50 l/m 2 day atm. It has a base of polyethylene, for example a coextruded LLDPE and has a very thin thickness (around 30 ⁇ m) and a weight of 28 g/m 2 in order to be able to obtain the aforesaid high values of permeability.
  • Such a film would alone be very fragile and therefore subject to easy tearing.
  • the outer film 6 is assigned the task of conferring toughness to the bag and avoiding easy breaking.
  • This outer film 6, according to the invention, is a nonwoven fabric of fibres constituted by a PP/PE mixture of 60-85 g/m 2 .
  • the manufacture of the outer film 6 in PP/PE nonwoven fabric allows the elimination of the disadvantages due to the adherence between the inner and outer films when the bag 1 is inserted in a containing box (bag-in-box) normally in cardboard.
  • the greater wrinkling of the nonwoven fabric according to the invention prevents the adherence between the films and allows easy release of the gas, in particular CO 2 , through the nonwoven fabric of the outer film 6, which has micro holes over the entire surface.

Description

  • The object of the present invention is a bag for the containing of liquid products which emanate gas, in particular yeasts for bread making.
  • In the following description specific reference will be made to yeast, but it is to be understood that the invention can be applied to any liquid or paste product which during storage emanates gas.
  • Yeast, in the phase of production, is always in the liquid state and, for the placing on the market, in the majority of cases, is subsequently dehydrated in order to transform it into powder or into the form of solid cakes. In the phase of use the yeast has once again to be returned to the liquid form.
  • In recent times there has been the tendency to produce and package the yeast directly in liquid form which is advantageous from practical and economic standpoints in that the phases of transformation from the liquid state to the solid state during production and vice versa during use are eliminated.
  • The problem in the storage of the liquid yeast is that it emanates a considerable quantity of gas, in particular CO2 up to 1/3 litres a day for a package of 10/20 litres.
  • Bags are therefore necessary which on the one hand are highly permeable to the gases and on the other hand have adequate toughness for sustaining the weight of the content, these bags normally having a capacity of 10/20 litres.
  • In order to meet these needs "double wall" bags have therefore been proposed, i.e. having a polyethylene-based inner film highly permeable to CO2, with very thin thickness (30-50 µm) and therefore with little mechanical strength, and an outer film constituted by a nylon-based laminate, with thickness of 80-150 µm, suitable for conferring the necessary mechanical strength to the bag.
  • The outer film, which is not permeable, has a plurality of small holes to allow the release of the gases which permeate through the inner film.
  • The bag shaped in this way is placed inside a cardboard box in such a way as to constitute a so-called bag-in-box packaging which can easily be manipulated.
  • The bags of the aforementioned type have not proved to be satisfactory in that despite the providing of the perforated outer film an unsatisfactory release of the gases which tend to inflate the bag has been noted.
  • This is due to the fact that when the bag filled with liquid yeast is inserted in the cardboard box it adapts to the box, causing a pressure contact between the outer surface of the bag and the inner walls of the box, apart from the head space of the bag which remains clear.
  • This pressure contact causes a strong adherence between the inner and outer plastic films of the bag, practically clogging the holes provided in the outer film and preventing therefore the release of the gases, which tend to accumulate in the upper part of the bag, where they have difficulty in exiting due to the small perforated surface of the outer film not in contact with the inner wall of the containing box.
  • The object of the invention is that of eliminating the aforesaid disadvantages of the prior art.
  • More particularly an object of the invention is that of providing a bag for liquid yeasts which allows a complete and rapid degassing of the product contained therein.
  • Another object of the present invention is that of providing such a bag which is simple and economical to manufacture.
  • The bag according to the invention has the features of the annexed independent claim 1.
  • Advantageous embodiments of the invention are disclosed by the dependent claims.
  • Substantially the bag according to the invention, of the so-called double wall type, comprises a polyethylene-based inner film with high permeability and a reinforcing outer film, wherein the outer film is a nonwoven fabric of polyethylene-based fibres, so as to be sealable to the inner film.
  • Conveniently the fibres of the nonwoven fabric of the outer film are constituted by a mixture of polypropylene and polyethylene (PP/PE), with a weight of 60-85 g/m2.
  • Further features of the invention will be made clearer by the following detailed description, referred to one of its embodiments purely by way of a non-limiting example illustrated in the accompanying drawings, in which:
    • Figure 1 is a schematic plan view of the bag according to the invention;
    • Figure 2 is an enlarged section view taken along line II-II of Figure 1;
    • Figure 3 is a schematic perspective view of the bag of Figure 1.
    Referring to these drawings, the bag according to the invention, for the containing of liquid products which emanate gas, in particular yeast, has been denoted by reference numeral 1.
  • It comprises two opposite faces 2, joined by means of perimeter heat sealing 3, which runs parallel to its outer edge 4.
  • In the accompanying drawings the bag 1 has been illustrated rectangular in shape, which is the simplest to make, but it is clear that it can take on any other shape.
  • The bag 1 is of the so-called double wall type, in the sense that each of its two opposite faces 2 comprises two films, an inner one 5 and an outer one 6, separated one from the other and joined only at said perimeter heat-sealing line 3.
  • On one of the two faces 2 of the bag 1 a spout 7 for filling/delivering of the product is applied, having a circular flange 8 sealed internally to the corresponding face 2, while the spout 7 projects through a hole formed in this face, and is closed by a cap 9.
  • The inner film 5 of the double wall of the bag is with high permeability to gases, in particular to CO2 which is produced in a large quantity by the yeast contained in the bag, > 50 l/m2day atm. It has a base of polyethylene, for example a coextruded LLDPE and has a very thin thickness (around 30 µm) and a weight of 28 g/m2 in order to be able to obtain the aforesaid high values of permeability.
  • Such a film would alone be very fragile and therefore subject to easy tearing.
  • Therefore the outer film 6 is assigned the task of conferring toughness to the bag and avoiding easy breaking.
  • This outer film 6, according to the invention, is a nonwoven fabric of fibres constituted by a PP/PE mixture of 60-85 g/m2.
  • The presence of polyethylene in the mixture constituting the fibres of the nonwoven fabric allows the performance of the perimeter heat sealing 3 to the inner film 5, as well as the heat sealing of the base 8 of the spout 7.
  • The manufacture of the outer film 6 in PP/PE nonwoven fabric allows the elimination of the disadvantages due to the adherence between the inner and outer films when the bag 1 is inserted in a containing box (bag-in-box) normally in cardboard.
  • In fact the greater wrinkling of the nonwoven fabric according to the invention, with respect to the perforated plastic film of the prior art, prevents the adherence between the films and allows easy release of the gas, in particular CO2, through the nonwoven fabric of the outer film 6, which has micro holes over the entire surface.
  • From what has been disclosed the advantages appear clear of the invention which allows, with simple and economical means, the complete and rapid release of the CO2 gas produced by the liquid contained in the bag 1.
  • Naturally the invention is not limited to the particular embodiment previously described and illustrated in the accompanying drawings, but instead numerous detail changes can be made thereto, within reach of the person skilled in the art, without thereby departing from the scope of the same invention as defined in the annexed claims.

Claims (4)

  1. Bag for containing liquid products which produce gas, in particular yeast, of the double wall type, comprising two opposite faces (2) joined one to the other along a perimeter heat-sealing line (3) and a spout (7) for filling/delivering the liquid product placed on one of these faces (2), the double wall of the bag comprising a polyethylene-based inner film (5) with high permeability and a reinforcing outer film (6), characterised in that said outer film (6) is made of a polyethylene-based nonwoven fabric.
  2. Bag according to claim 1, characterised in that said nonwoven fabric is a mixture of polypropylene and polyethylene (PP/PE).
  3. Bag according to claim 2, characterised in that said nonwoven fabric of the outer film (6) has a weight of 60-85 g/m2.
  4. Bag according to claim 1, characterised in that said inner film (5) is a coextruded LLDPE of 30 µm and 28 g/m2.
EP13163611.0A 2012-04-18 2013-04-12 Bag for the containing of liquid products emanating gas, in particular yeast Active EP2653403B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13163611T PL2653403T3 (en) 2012-04-18 2013-04-12 Bag for the containing of liquid products emanating gas, in particular yeast

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000647A ITMI20120647A1 (en) 2012-04-18 2012-04-18 BAG FOR THE CONTAINMENT OF LIQUID PRODUCTS EMANATING AS GAS, IN PARTICULAR YEAST

Publications (2)

Publication Number Publication Date
EP2653403A1 EP2653403A1 (en) 2013-10-23
EP2653403B1 true EP2653403B1 (en) 2014-12-03

Family

ID=46051760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13163611.0A Active EP2653403B1 (en) 2012-04-18 2013-04-12 Bag for the containing of liquid products emanating gas, in particular yeast

Country Status (12)

Country Link
US (1) US20130279830A1 (en)
EP (1) EP2653403B1 (en)
JP (1) JP6130713B2 (en)
CN (1) CN103373519B (en)
AR (1) AR090741A1 (en)
BR (1) BR102013009353B1 (en)
CA (1) CA2812483C (en)
CL (1) CL2013001011A1 (en)
ES (1) ES2531321T3 (en)
IT (1) ITMI20120647A1 (en)
MX (1) MX2013004216A (en)
PL (1) PL2653403T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102782118B (en) * 2010-02-08 2016-01-13 巴斯夫公司 For improvement of the method and apparatus of the Oxygen permeability in microorganism storage receptacle

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6151363U (en) * 1984-09-07 1986-04-07
US5126070A (en) * 1989-10-20 1992-06-30 The Drackett Company Chlorine dioxide generator
JP2598821Y2 (en) * 1992-06-11 1999-08-23 レンゴー株式会社 Bamboo shoot packaging
JPH0669146U (en) * 1993-03-09 1994-09-27 凸版印刷株式会社 Double bag
AU7128498A (en) * 1997-04-14 1998-11-11 Sealed Air Corporation Gas-permeable foam in bag packaging system
JP3663124B2 (en) * 2000-11-16 2005-06-22 財団法人福岡県産業・科学技術振興財団 Packaged food storage bags
JP4803482B2 (en) * 2005-06-03 2011-10-26 大幸薬品株式会社 Gas divergence bag
DE202006011976U1 (en) * 2006-08-04 2006-10-19 Nordfolien Gmbh Packaging formed as a sack for bulky materials comprises spacers arranged in connecting-free regions between a valve foil and an inner foil
US20080116098A1 (en) * 2006-11-16 2008-05-22 Pwp Industries Food container with breathable patch
DE102007018579B4 (en) * 2007-04-18 2012-03-15 Abts- Advanced Bag Technology & Service Gmbh Cement bag and manufacturing process
JP5174476B2 (en) * 2008-01-29 2013-04-03 ドレンシー株式会社 Alcohol volatilizer
US7772139B2 (en) * 2008-03-19 2010-08-10 Shubham Chandra Permeable non-woven fabric based packaging
CN102782118B (en) * 2010-02-08 2016-01-13 巴斯夫公司 For improvement of the method and apparatus of the Oxygen permeability in microorganism storage receptacle

Also Published As

Publication number Publication date
EP2653403A1 (en) 2013-10-23
CA2812483A1 (en) 2013-10-18
JP6130713B2 (en) 2017-05-17
MX2013004216A (en) 2013-10-17
CN103373519A (en) 2013-10-30
CL2013001011A1 (en) 2014-07-25
PL2653403T3 (en) 2015-06-30
BR102013009353A2 (en) 2015-11-17
CN103373519B (en) 2017-11-28
CA2812483C (en) 2021-01-19
JP2013220856A (en) 2013-10-28
US20130279830A1 (en) 2013-10-24
ES2531321T3 (en) 2015-03-13
BR102013009353B1 (en) 2021-01-05
ITMI20120647A1 (en) 2013-10-19
AR090741A1 (en) 2014-12-03

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