EP3585609A1 - Mit einem film beschichteter behälter - Google Patents

Mit einem film beschichteter behälter

Info

Publication number
EP3585609A1
EP3585609A1 EP18706987.7A EP18706987A EP3585609A1 EP 3585609 A1 EP3585609 A1 EP 3585609A1 EP 18706987 A EP18706987 A EP 18706987A EP 3585609 A1 EP3585609 A1 EP 3585609A1
Authority
EP
European Patent Office
Prior art keywords
layer
container according
film
elastomer
thermoplastic
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Withdrawn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
EP18706987.7A
Other languages
English (en)
French (fr)
Inventor
Charles Jacques Madeleine VAN REIJ
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.)
Packconnect BV
Original Assignee
Packconnect BV
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 Packconnect BV filed Critical Packconnect BV
Publication of EP3585609A1 publication Critical patent/EP3585609A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B32B1/00—Layered products having a non-planar shape
    • 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
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • 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
    • B32B2307/518—Oriented bi-axially
    • 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
    • B32B2307/726—Permeability to liquids, absorption
    • 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
    • B32B2307/732—Dimensional 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/738—Thermoformability
    • 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
    • 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
    • B32B2439/70—Food packaging

Definitions

  • Another container for the packaging of fresh meat and fish comprises a tray consisting out of polypropylene covered with a lidding film.
  • the lidding film for this container preferably consist out of biaxially oriented polypropylene film and a multilayer sealing film.
  • the multilayer film preferably further comprises a layer of ethylene vinyl alcohol (EVOH) as an oxygen barrier layer.
  • EVOH ethylene vinyl alcohol
  • the EVOH layer is bound between polypropylene copolymer sealing layer and another polyethylene support layer via a tie layer during an multilayer extrusion process.
  • the biaxially oriented polypropylene layer and the multilayer seal layer are glued together in a lamination step.
  • the lidding film is preferably coated with an antifog coating to ensure a good presentation of the packed produce.
  • Another container for the packaging of fresh meat and fish comprises a tray comprising a polystyrene, more preferably an expanded polystyrene layer and a polyethylene layer.
  • the polyethylene layer in the tray preferably further comprises a layer of ethylene vinyl alcohol (EVOH) as the oxygen barrier layer.
  • EVOH ethylene vinyl alcohol
  • the EVOH layer is bound between a polyethylene sealing layer and another polyethylene support layer via a tie layer during an multilayer extrusion process.
  • the polystyrene layer and the seal layer are glued together in a lamination step.
  • a polymeric sealing layer with specific properties to, a preferably biaxially oriented, thermoplastic polymer carrier layer, such as a polyethylene terephthalate based lidding film, can advantageously be used to provide a container for the packaging of fresh meat and fish that fulfills some or all desires expressed.
  • the total amount of all the diols also adds up to 100 mol%.
  • Other dicarboxylic acids and diols can be used for the polymer composition of the first polymer layer. These dicarboxylic acids and diols are known to people skilled in the art. It is particularly advantageous when a polyester based on terephthalate and small amounts ( ⁇ 5 mol %) of isophthalic acid or based on small amounts ( ⁇ 5 mol %) of naphthalene-2,6-dicarboxylic acid is used in the in composition of the polymer formulation of the first polymer layer. In this case, the produce ability of the film and the optical properties of the film are particularly good.
  • the first polymer layer then comprises substantially a polyester copolymer which is composed predominantly out of terephthalic acid and isophthalic acid units and/or terephthalic acid and naphthalene-2,6-dicarboxylic acid units and of ethylene glycol units.
  • the particularly preferred copolyesters which provide the desired properties of the film are those which are composed of terephthalate and isophthalate units and of ethylene glycol units.
  • SiOx gas barrier layer compared to other gas barrier materials are firstly that it has a positive environmental profile, secondly, that it is not affected when in contact with surrounding moisture or liquid, it is transparent and since it is applied in very thin layers, also flexible and resistant to cracking when bent or folded.
  • the first polymer layer can comprise a thin layer of SiOx or AlOx gas barrier coating applied by means of plasma enhanced chemical vapor deposition.
  • the terms hard segments and soft segments in relation to thermoplastic polyetherester elastomers can be explained as follows.
  • the soft segments are the polyether segments, having a weakening point below room temperature.
  • the hard segments are the polyester segments, having a weakening temperature above room temperature.
  • the thermoplastic polyetherester elastomer may contain between 10 and 90 wt. % of the polyethylene oxide soft segments, preferably between 15 and 70 wt. %, more preferably between 20 - 60 wt.%, most preferably between 25 and 50 wt. %. This ensures good anti-fog properties of the packaging.
  • the polyethylene oxide segments may be incorporated in the thermoplastic polyetherester elastomer as poly(ethylene oxide)diol soft segments and/or poly(ethylene oxide/polypropylene oxide/polyethylene oxide)diol soft segments.
  • the thermoplastic copolyetherester elastomer may comprise further soft segments. These further soft segments may comprise amongst others poly(tetramethylene oxide) diol.
  • Suitable copolyether esters can include products commercially available from companies under tradenames, for example, HytrelTM available from E. I. du Pont de Nemours and Company (DuPont), RiteflexTM available from Ticona, and ArnitelTM available from DSM.
  • HytrelTM available from E. I. du Pont de Nemours and Company (DuPont)
  • RiteflexTM available from Ticona
  • ArnitelTM available from DSM.
  • Polyamides may be nylon 6 or nylon 12.
  • a commercially available series of polyetheramides are available under the tradename PebaxTM from Arkema.
  • the thickness of the second layer is between 5 micrometers and 50 micrometers, more preferably between 10 micrometers and 30 micrometers.
  • the multi-layer packaging film according to the invention can be produced according to a coextrusion cast film process or a coextrusion blown film process. After coextrusion, the cast film is preferably biaxially oriented.
  • the coextrusion blown film process can be a single bubble blown film process or a double or triple bubble blown film process.
  • the blown film process is a double or triple blown film process, such that a biaxially oriented blown film has been produced. It is also possible to apply the second layer by lamination or extrusion coating onto the first layer, which preferably has been biaxially oriented before.
  • the multi-layer packaging film according to the invention may be printed.
  • the film optionally contains perforations, preferably in the form of micro-perforations.
  • the size of the perforation is preferably between 50 micrometers and 300 micrometers and even more preferably between 70 and 130 micrometers.
  • laser technology is used for the formation of the perforations.
  • the number of perforations are up to 1000 per m 2 and more preferably up to 500 per m 2 .
  • Figure 2 is a sectional view of film (1) according to the present invention comprising a carrier (2) layer, a tie layer or bonding layer (3) and a heat seal layer (4) in which there is dispersed a non-compatible polymer (5).
  • COPE 1 Thermoplastic copolyesters ether heat sealable resin: Hytrel HTR8171 available from E. I. du Pont de Nemours and Company (DuPont). The heat seal resin has a water absorption of 54 wt%, a melting point of 150°C and a glass transition temperature of -42°C.
  • COPE 2 Thermoplastic copolyesters ether heat sealable resin: Hytrel G3548 available from E. I. du Pont de Nemours and Company (DuPont). The heat seal resin has a water absorption of 7 wt%, a melting point of 157°C and a glass transition temperature of -58°C.
  • COPE 3 Thermoplastic copolyesters ether heat sealable resin: Hytrel HTR8206 available from E. I. du Pont de Nemours and Company (DuPont). The heat seal resin has a water absorption of 30 wt%, a melting point of 200°C and a glass transition temperature of - 38°C.
  • COPE 4 Thermoplastic copolyesters ether heat sealable resin: Arnitel VT3108 available from DSM Engineering Plastics. The heat seal resin has a water absorption of 33 wt%, a melting point of 185°C and a glass transition temperature of - 45°C.
  • the carrier films were used as received and the films were subsequently coated with a primer layer, the water was evaporated to leave the primer material behind and the pretreated carrier films were coated using conventional coating means with the heat seal layers described. Table 1 lists the films made out of the different combinations of carrier films and heat seal films.
  • anti-fog properties of films has been done with the so called hot fog test.
  • a jar filled with water and lidded with a glass plate is placed into an oven at 70°C.
  • An airgap of 2 cm is kept between the water level and glass plate.
  • the jar is removed and the glass plate is replaced quickly with the test substrate.
  • the speed at which visual fog formation appears underneath the film is a measure for the anti-fog properties of the film.
  • Anti-fog properties are considered poor if fog appears within 5 seconds, moderate if it appears between 5 to 10 seconds and good is it appears between 10 to 15 seconds. If the film stays clear for maximum 15 seconds anti-fog properties are excellent.
  • the purpose of this invention is to provide a lidding film which is suitable for polyester containers in the fresh meat packaging industry as well as the fresh fruits and vegetables packaging industry.
  • the film according to example 1 & 2 is able to i) seal through contamination at 170°C ii) seal on clean PET trays at 130°C iii) show good to excellent anti-fog properties and iv) stays intact at freezing conditions during an impact test.
  • the films according to any of the comparative examples 1-4 fail on 1 or more aspects of the purpose of the invention.
  • the film according to comparative example 1 & 2 fail on the decreased seal through contamination test as well as the clean seal test.
  • the film according to comparative example 3 fails in the anti-fog test and the film according to comparative example 4 fails in the decreased seal through contamination trial as well as the freezer test.
  • PLA polylactic acid or polylactide
  • COPE1 COPE1
  • PLA is a polyester which is commercial available and helps in sustainability.
  • a thermoformed polyester tray is filled with a food item.
  • thermoformed tray a heat sealable multi-layered film is sealed the multilayered film comprising a carrier layer and a heat-seal layer, wherein the carrier layer consists of;
  • a polymer composition consisting of at least 80% by weight of thermoplastic polymer based on the total weight of the carrier layer and the heat seal layer consists of;
  • thermoplastic copolyesterether elastomer or copolyetheramide elastomer has; i. a water absorption above 3 wt%, based on the mass of the thermoplastic copolyesterether elastomer or copolyetheramide elastomer
  • the carrier layer and/or the heat seal layer comprises any one or more, alone or in any combination of the above described features for preferred embodiments of the container according to the invention. Sealing of the multilayer film to the tray may be accomplished by application of heat or by other methods such as the application of ultrasound.
  • US5888599 describes a multi-layer lidding film having an outer copolyester heat seal layer. This layer is not a copolyetherester, but a copolyester layer. Copolyesters do not have any significant water absorption and therefore lack anti-fog properties. Furthermore, the co-polyesters described in US5888599 are amorphous solvent-based polymers. Amorphous polymers do not have a melting point.
  • the heat seal layer of US201322441 has no anti-fog properties and is thus completely different from the heat- and anti-fog seal layer according the invention.
  • WO2006075141 describes a self-venting sealing film for ovenable meals.
  • the self-venting film has a substrate layer with one or more venting means therein. This directly implies that the high oxygen barrier which is needed for sealing film in fresh meat packaging can not be achieved anymore.
  • WO2006075141 makes no reference to melting points, glass transition temperature or antifog properties.
  • copolyetherester and copolyesterether used above describe the same substances, namely copolymers comprising an ether and an ester. Both terms are used in literature for such substances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Packages (AREA)
EP18706987.7A 2017-02-24 2018-02-16 Mit einem film beschichteter behälter Withdrawn EP3585609A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE201705114 2017-02-24
PCT/EP2018/053949 WO2018153795A1 (en) 2017-02-24 2018-02-16 Container covered with a film

Publications (1)

Publication Number Publication Date
EP3585609A1 true EP3585609A1 (de) 2020-01-01

Family

ID=61274234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18706987.7A Withdrawn EP3585609A1 (de) 2017-02-24 2018-02-16 Mit einem film beschichteter behälter

Country Status (2)

Country Link
EP (1) EP3585609A1 (de)
WO (1) WO2018153795A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021171962A (ja) * 2020-04-22 2021-11-01 東洋鋼鈑株式会社 ヒートシール用フィルムおよび包装材料

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599348B2 (ja) * 1975-05-12 1984-03-01 東レ株式会社 積層ポリエステルフイルム
US5888599A (en) 1993-04-19 1999-03-30 E. I. Du Pont De Nemours And Company Multi-layer lidding film having improved heat seal properties and methods relating thereto
US20050079372A1 (en) 2003-10-09 2005-04-14 Schmal Michael D. Polyester films and methods for making the same
BRPI0510204A (pt) 2004-05-12 2007-10-16 Du Pont filme laminado, produto e processo
GB0500907D0 (en) 2005-01-17 2005-02-23 Dupont Teijin Films Us Ltd Self-venting polymeric film IV
DE202010008675U1 (de) 2010-09-30 2011-01-27 Kobusch-Sengewald Gmbh Mehrschichtverbundfolie
CA2778157A1 (en) 2011-07-20 2013-01-20 Thor's Oil Products, Inc. Method and apparatus for bulk transport of proppant
US20130224411A1 (en) 2012-02-27 2013-08-29 Jon Ian MONTCRIEFF Peelable antifog coated film for amorphous polyester trays

Also Published As

Publication number Publication date
WO2018153795A1 (en) 2018-08-30

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