EP2323913A2 - Stratifié destiné à la fabrication d un sac conçu pour contenir des matières liquides, à base de polymère orienté, et sac produit à partir de celui-ci - Google Patents

Stratifié destiné à la fabrication d un sac conçu pour contenir des matières liquides, à base de polymère orienté, et sac produit à partir de celui-ci

Info

Publication number
EP2323913A2
EP2323913A2 EP09798300A EP09798300A EP2323913A2 EP 2323913 A2 EP2323913 A2 EP 2323913A2 EP 09798300 A EP09798300 A EP 09798300A EP 09798300 A EP09798300 A EP 09798300A EP 2323913 A2 EP2323913 A2 EP 2323913A2
Authority
EP
European Patent Office
Prior art keywords
layer
bag
sub
flowable material
evoh
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.)
Withdrawn
Application number
EP09798300A
Other languages
German (de)
English (en)
Other versions
EP2323913A4 (fr
Inventor
David Bellmore
Karen Berger
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.)
Scholle IPN Corp
Original Assignee
Scholle Corp
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 Scholle Corp filed Critical Scholle Corp
Publication of EP2323913A2 publication Critical patent/EP2323913A2/fr
Publication of EP2323913A4 publication Critical patent/EP2323913A4/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • 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
    • B32B2274/00—Thermoplastic elastomer material
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/744—Non-slip, anti-slip
    • 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
    • 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
    • B32B2439/40—Closed containers
    • B32B2439/46—Bags

Definitions

  • the disclosure relates in general to bags, and more particularly, to a laminate for a bag for flowable material having an oriented polypropylene.
  • bags for flowable material such as liquids and syrups (among others)
  • wines are packaged in such bags which are then inserted into boxes (commonly termed bag-in-box wine packaging).
  • bag-in-box wine packaging A constant struggle with such packaging is to limit bag cracking that typically occurs during shipping and transport. Additionally, with certain products, it is necessary to limit the quantity of oxygen that is transmitted through the bag (typically quite significant for wine products).
  • One structure that is utilized comprises a three layer laminate comprising an EVOH cap layer, a BON core layer and a PE sealant layer. While this structure has been utilized, there is a need to provide a structure that has a material which has less susceptibility to flex cracking and which has a lower oxygen transmission rate.
  • the disclosure is directed to a bag for a flowable material comprising a plurality of walls coupled together by way of a plurality of seals to define a substantially fluid tight cavity.
  • the plurality of walls each comprising a laminate structure comprising a sealant layer comprising a polyethylene material; a core layer comprising an oriented polypropylene material; and a cap layer comprising an EVOH material.
  • At least one of the layers further includes a metallized vapor deposited layer thereon.
  • the metallized vapor deposited layer is deposited on a side of the core layer.
  • the metallized vapor deposited layer comprises aluminum.
  • the metallized vapor deposited layer comprises one of the group consisting of: metals, PVDC, aluminum oxide and silicon oxide.
  • the sealant layer further comprises: 1.8 mil thick 0.920 g/cc octene LLDPE (l.Og/10 min MI).
  • the core layer further comprises 0.70 mil thick oriented polypropylene material.
  • the core layer further includes a treatment applied thereto, wherein the treatment is selected from the group consisting of: plain, corona, plasma and chemical.
  • the cap layer may comprise a multi-sub-layer EVOH based layer.
  • the base of the EVOH layer comprises a propylene sub-layer.
  • the EVOH layer includes a plurality of polyethylene sub-layers sandwiched around an EVOH sub-layer.
  • the EVOH layer comprises a plurality of sublayers including, at least one vinyl acetate sub-layer, a plurality of polyethylene sublayers and an EVOH sub-layer surrounded by the plurality of polyethylene sub-layers.
  • the EVOH layer comprises five sub-layers, including, in order, a first linear low density polyethylene sub-layer, a second linear low density polyethylene sub-layer, a third linear low density polyethylene sub-layer, an EVOH sub-layer, and a forth linear low density polyethylene sub-layer.
  • the first linear low density sub-layer comprises a 0.55 mil 50%
  • the second linear low density sub-layers comprise a 0.20 mil
  • the third linear low density sub-layer comprises a 0.30 mil 29 mol°/o ethylene EVOH (3.8g/10 Min MI).
  • the EVOH sub-layer comprises a 0.20 mil 100% 0.924 g/cc anhydride modified LLDPE (2.2 g/10 min MI).
  • the fourth linear low density sub-layer comprises a 0.55 mil
  • Figure 1 of the drawings is a top plan view of a bag having the laminate construction of the present invention.
  • Figure 2 of the drawings is a cross-sectional view of the laminate construction of the present invention.
  • a bag 12 having a laminate structure 10 is shown.
  • the bag comprises a conventional bag for flowable material (such as syrup, wine, fine powders, and the like).
  • a pillow type bag is shown which includes a plurality of walls 20, 22 and a plurality of seals, such as seal 24 which joins the walls to each other to define cavity 25.
  • a spout, such as spout 26 is disposed on one of the walls to provide fluid communication to the cavity.
  • Typical sizes for such pillow type containers often range between 1 liter and 20 liters. Of course, this is not deemed as limiting the bag to a particular size, but, rather, is provided as exemplary of conventional sizes of such containers.
  • the laminate structure 10 can be used in association with other bag constructions, such as gusseted bags or bags that are formed from a number of different constructions with a number of different seals formed in any one of a number of different formats.
  • the laminate is shown in an exemplary embodiment with the understanding that there is no limitation as to the configuration and structure of the bag with which the laminate is utilized.
  • the laminate structure comprises a sealant layer 30, a core layer 32 and a cap layer 34.
  • the three layers are laminated together. In one embodiment, it is contemplated that the three layers are adhered to each other.
  • a two component solventless polyurethane adhesive system 41, 43 can be utilized between the layers.
  • the three layers may be thermally bonded together. Indeed, the particular manner in which the three layers are coupled together to form a laminate can be another mechanism altogether without departing from the scope of the invention.
  • the sealant layer (which comprises the product contact layer) comprises a polyethylene material.
  • the material comprises a 1.8 mil thick 0.920 g/cc octene LLDPE (l.Og/10 min MI) with anti-block, anti-oxidant and slip additives.
  • LLDPE linear low density polyethylene
  • a propylene based sealant layer can be utilized (homopolymer, impact copolymer, random copolymer or elastomer/plastomer). In certain embodiments, such a propylene based sealant layer can aid adhesion during thermal lamination processes.
  • the core layer 32 comprises an oriented polypropylene film (OPP).
  • OPP oriented polypropylene film
  • this layer may be metalized such that the structure may include a 2.1 minimum optical density aluminum layer.
  • One manner of applying such a metallized layer comprises the use of metal vapor deposition on the film.
  • metal vapor deposition on the film.
  • other configurations of oriented polypropylene films are likewise contemplated for use.
  • optical density can be varied as desired.
  • the cap layer 34 comprises a EVOH material.
  • a five sub-layer co-extruded EVOH based layer is contemplated.
  • the five sub-layers 51-55 comprise: (1) 0.55 mil 50% 12%VA (0.40 g/10 min MI)/ 50% 0.920 g/cc octene LLDPE (l .Og/10 min MI) with anti-block, anti-oxidant, and slip additives; (2) 0.20 mil 100% 0.924 g/cc anhydride modified LLDPE (2.2 g/10 min MI); (3) 0.30 mil 29 mol% ethylene EVOH (3.8g/10 Min MI); (4) 0.20 mil 100% 0.924 g/cc anhydride modified LLDPE (2.2 g/10 min MI); and (5) 0.55 mil 100% 0.920 g/cc octane LLDPE (l.Og/10 min MI) with anti-block, anti-oxidant, and slip additives.
  • a propylene based cap layer can be utilized (homopolymer, impact copolymer, random copolymer or elastomer/plastomer).
  • a propylene based cap layer can aid adhesion during thermal lamination. More specifically, this would be applicable to just OPP (not MOPP) and the propylene based material would be added to layer 55 ( Figure 2).
  • the present disclosed embodiment has over a three-fold increase in flex crack resistance and over a two-fold improvement in oxygen transmission rate. As the OPP material has a lower modulus than the prior used BON, the thickness of this layer can be increased without affecting the bag modulus.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Bag Frames (AREA)
  • Wrappers (AREA)
  • Packages (AREA)

Abstract

L’invention concerne un sac conçu pour contenir des matières liquides comprenant une pluralité de parois assemblées ensemble au moyen d’une pluralité de joints pour créer une cavité sensiblement étanche. Chaque paroi d’une pluralité de parois présente une structure stratifiée comprenant une couche de scellage d’un matériau polyéthylène, une couche âme d’un matériau polypropylène orienté, et une couche d’encapsulation d’un matériau EVOH.
EP09798300.1A 2008-07-15 2009-07-15 Stratifié destiné à la fabrication d un sac conçu pour contenir des matières liquides, à base de polymère orienté, et sac produit à partir de celui-ci Withdrawn EP2323913A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13493308P 2008-07-15 2008-07-15
PCT/US2009/004103 WO2010008557A2 (fr) 2008-07-15 2009-07-15 Stratifié destiné à la fabrication d’un sac conçu pour contenir des matières liquides, à base de polymère orienté, et sac produit à partir de celui-ci

Publications (2)

Publication Number Publication Date
EP2323913A2 true EP2323913A2 (fr) 2011-05-25
EP2323913A4 EP2323913A4 (fr) 2017-04-19

Family

ID=41550913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09798300.1A Withdrawn EP2323913A4 (fr) 2008-07-15 2009-07-15 Stratifié destiné à la fabrication d un sac conçu pour contenir des matières liquides, à base de polymère orienté, et sac produit à partir de celui-ci

Country Status (7)

Country Link
US (1) US20100129008A1 (fr)
EP (1) EP2323913A4 (fr)
AU (1) AU2009271582B2 (fr)
BR (1) BRPI0911001A2 (fr)
CA (1) CA2730779C (fr)
NZ (1) NZ590589A (fr)
WO (1) WO2010008557A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101046627B1 (ko) 2011-03-08 2011-07-05 윤태훈 전자기기 포장용 실딩 필름 제조방법
US20160304332A1 (en) 2015-04-17 2016-10-20 Ds Smith Plastics Limited Multilayer film used with flexible packaging
NL2023592B1 (en) * 2019-07-30 2021-02-23 Scholle Ipn Ip Bv Container assembly and method for preparing such a container assembly

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Also Published As

Publication number Publication date
NZ590589A (en) 2013-06-28
US20100129008A1 (en) 2010-05-27
CA2730779A1 (fr) 2010-01-21
CA2730779C (fr) 2015-11-24
BRPI0911001A2 (pt) 2015-10-06
AU2009271582A1 (en) 2010-01-21
WO2010008557A3 (fr) 2010-04-22
WO2010008557A2 (fr) 2010-01-21
AU2009271582B2 (en) 2015-02-05
EP2323913A4 (fr) 2017-04-19

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