THERMOFORMED PACKAGING ARTICLES WITH ALTERNATING INDIVIDUAL LAYERS OF GLASS AND PLASTIC

• US 20190322080A1
• Filed: 12/20/2016
• Published: 10/24/2019
• Est. Priority Date: 12/20/2016
• Status: Active Application

• Current Assignee: Bemis Company Incorporated (Amcor Plc)
• Original Assignee: Bemis Company Incorporated (Amcor Plc)
• Inventors: Vennerberg, Daniel C., Michaud, Ryan A.
• Application Number:
  US16/469,590
• Publication Number:
  US 20190322080A1
• Time in Patent Office: Days
• CPC Class Codes: B29C 48/0017 combined with blow-moulding or thermoforming
• CPC Class Codes: B29C 48/022 characterised by the choice of material
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/21 the layers being joined at their surfaces
• CPC Class Codes: B32B 17/10 of synthetic resin
• CPC Class Codes: B32B 17/10073 comprising at least two glass sheets, neither of which being an outer layer
• CPC Class Codes: B32B 17/10119 having a composition deviating from the basic composition of soda-lime glass, e.g. borosilicate
• CPC Class Codes: B32B 17/10724 containing polyamide
• CPC Class Codes: B32B 17/10743 containing acrylate (co)polymers or salts thereof
• CPC Class Codes: B32B 17/1077 containing polyurethane
• CPC Class Codes: B32B 17/10779 containing polyester
• CPC Class Codes: B32B 2250/05 5 or more layers
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 2250/42 Alternating layers, e.g. ABAB(C), AABBAABB(C)
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/20 Inorganic coating
• CPC Class Codes: B32B 2255/205 Metallic coating
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/31 Heat sealable
• CPC Class Codes: B32B 2307/7244 Oxygen barrier
• CPC Class Codes: B32B 2307/7246 : Water vapor barrier
• CPC Class Codes: B32B 2307/738 : Thermoformability
• CPC Class Codes: B32B 2439/00 : Containers; Receptacles
• CPC Class Codes: B32B 27/06 : as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08
• CPC Class Codes: B32B 27/08 : of synthetic resin
• CPC Class Codes: B32B 27/28 : comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
• CPC Class Codes: B32B 27/281 : comprising polyimides
• CPC Class Codes: B32B 27/285 : comprising polyethers
• CPC Class Codes: B32B 27/286 : comprising polysulphones; polysulfides
• CPC Class Codes: B32B 27/288 : comprising polyketones
• CPC Class Codes: B32B 27/302 : comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
• CPC Class Codes: B32B 27/304 : comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/306 : comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/308 : comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/32 : comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/325 : comprising polycycloolefins
• CPC Class Codes: B32B 27/34 : comprising polyamides
• CPC Class Codes: B32B 27/36 : comprising polyesters
• CPC Class Codes: B32B 27/365 : comprising polycarbonates
• CPC Class Codes: B32B 27/40 : comprising polyurethanes
• CPC Class Codes: B65D 1/0215 : multilayered B65D81/3837 takes precedence
• CPC Class Codes: B65D 25/14 : Linings or internal coatings of containers made by folding or erecting blanks made of paper B65D5/56 ; linings for domestic water storage heaters F24H1/183
• CPC Class Codes: B65D 65/40 : Applications of laminates for particular packaging purposes B65D1/0215, B65D1/28, B65D3/22, B65D5/0281, B65D5/563, B65D9/30, B65D29/02, B65D31/02, B65D75/26, B65D77/2024, B65D81/1275, B65D81/3811, B65D81/3823, B65D81/3834, B65D81/3846, B65D81/3858, B65D81/3874, B65D81/3886, B65D81/3897 take precedence; laminates per se or laminated packages characterised by the composition or
• CPC Class Codes: Y10T 428/131 : Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
• CPC Class Codes: Y10T 428/1317 : Multilayer [continuous layer]
• CPC Class Codes: Y10T 428/1321 : Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/1352 : Polymer or resin containing [i.e., natural or synthetic]

Abstract

The present invention is directed to thermoformed packaging articles comprising a coextruded film having alternating individual layers of glass and plastic. These thermoformed packaging articles may be used for packaging oxygen- and/or moisture sensitive foods and pharmaceutical/medical/dental products.

Claims

1. A thermoformed packaging article comprising:

a draw depth within a range from 2.5 mm to 254 mm,

a multilayer packaging film comprising a coextruded film comprising alternating layers of glass and plastic,

wherein the number of glass layers is at least two and the number of plastic layers is at least one,

wherein the multilayer packaging film has a total thickness within a range from 10 μ

m to 250 μ

m, and

wherein the glass comprises on an elemental basis tin in a mole percentage within a range from 12.0 to 17.1, fluorine in a mole percentage within a range from 11.2 to 24.3, phosphorus in a mole percentage within a range from 12.1 to 19.6, and oxygen in a mole percentage within a range from 43.3 to 61.1.

2. A thermoformed packaging article of claim 1, wherein the multilayer packaging film has a water vapor transmission rate within a range from 0 to 1 g/m²/24 hour at 38°

C. and 90% relative humidity.

3. A thermoformed packaging article of claim 1, wherein the multilayer packaging film has an oxygen transmission rate within a range from 0 to 1 cm³/m²/24 hour at 23°

C. and 0% relative humidity.

4. A thermoformed packaging article of claim 1, wherein the plastic comprises aliphatic and aromatic polyamides, polyethers, polyimides, aliphatic and aromatic polyesters, cyclic olefin copolymers, polyolefin homopolymers and copolymers, high density polyethylenes, anhydride-modified polyethylenes, ethylene vinyl acetate copolymers, polypropylenes, polyamideimides, polycarbonates, polyetheretherketones, polyetherimides, polyethersulphones, polymethyl methacrylates, polyoxymethylenes, polyphenylene sulphides, polystyrenes, unplasticized polyvinyl chlorides, and blends thereof.

5. A thermoformed packaging article of claim 1, wherein the glass has a glass transition temperature, T_g of less than 200°

C.

6. A thermoformed packaging article of claim 1, wherein the glass has a glass transition temperature, To of less than 150°

C.

7. A thermoformed packaging article of claim 1, wherein the glass comprises on an elemental basis tin in a mole percentage within a range from 15.4 to 17.1, fluorine in a mole percentage within a range from 19.6 to 24.3, phosphorus in a mole percentage within a range from 14.2 to 16.6, and oxygen in a mole percentage within a range from 43.3 to 56.

8. A thermoformed packaging article of claim 1, wherein the number of glass layers is at least ten and the number of plastic layers is at least ten.

9. A thermoformed packaging article of claim 1, further comprising a sealant layer.

10. A thermoformed packaging article of claim 1, further comprising an abuse layer.