CA2797763A1 - Packaging for a tea pouch - Google Patents

Packaging for a tea pouch Download PDF

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Publication number
CA2797763A1
CA2797763A1 CA2797763A CA2797763A CA2797763A1 CA 2797763 A1 CA2797763 A1 CA 2797763A1 CA 2797763 A CA2797763 A CA 2797763A CA 2797763 A CA2797763 A CA 2797763A CA 2797763 A1 CA2797763 A1 CA 2797763A1
Authority
CA
Canada
Prior art keywords
layer
coextrusion
vinyl alcohol
packaging
ethylene vinyl
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.)
Abandoned
Application number
CA2797763A
Other languages
French (fr)
Inventor
Gary H. Knauf
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.)
Prolamina Midwest Corp
Original Assignee
Prolamina Midwest 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 Prolamina Midwest Corp filed Critical Prolamina Midwest Corp
Publication of CA2797763A1 publication Critical patent/CA2797763A1/en
Abandoned legal-status Critical Current

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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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • 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
    • B32B27/06—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
    • B32B27/10—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 paper or cardboard
    • 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
    • B32B27/28—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
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • 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
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different 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
    • 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
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric 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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7248—Odour barrier
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y10T428/31739—Nylon type
    • Y10T428/31743—Next to addition polymer from unsaturated monomer[s]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]
    • Y10T428/31797—Next to addition polymer from unsaturated monomers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31913—Monoolefin polymer
    • Y10T428/3192—Next to vinyl or vinylidene chloride polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31928—Ester, halide or nitrile of addition polymer

Abstract

A packaging for a tea pouch, a method of making the packaging, and a tea pouch made from the packaging are disclosed. The packaging includes a paper substrate and a coextrusion including an ethylene vinyl alcohol layer. The ethylene vinyl alcohol layer is directly attached to the paper substrate. Packaging of this type exhibits excellent barrier properties, may be heat sealed under pressure to form a tea pouch without substantial amounts of squeeze out, and does not present the cost or disposal issues associated with some other types of packaging.

Claims (38)

1. A packaging for a tea pouch, the packaging comprising:
a paper substrate; and a coextrusion including an ethylene vinyl alcohol layer;
wherein the ethylene vinyl alcohol layer is directly attached to the paper substrate.
2. The packaging of claim 1, wherein the ethylene vinyl alcohol layer is directly attached to the paper substrate along a paper substrate - ethylene vinyl alcohol layer interface.
3. The packaging of claim 1, wherein the paper substrate comprises cellulosic fibers.
4. The packaging of claim 1, wherein the coextrusion further comprises a tie sealant resin blend layer on the side of the ethylene vinyl alcohol layer not directly attached to the paper substrate.
5. The packaging of claim 1, wherein the coextrusion further comprises, on a side of the ethylene vinyl alcohol layer not directly attached to the substrate, a tie resin layer and a sealant layer, the tie resin layer being disposed at least in part between the ethylene vinyl alcohol layer and the sealant layer.
6. The packaging of claim 1, wherein the coextrusion is asymmetrical.
7. The packaging of claim 1, further comprising a polymeric barrier layer attached to a side of the paper substrate that is not directly attached to the coextrusion and further comprising another paper layer attached to the polymeric barrier layer such that the polymeric barrier layer is sandwiched between the paper substrate and the other paper layer.
8. The packaging of claim 7, wherein the polymeric barrier layer is selected from a group consisting of polyethylene and polypropylene.
9. The packaging of claim 1, wherein a coextrusion face of the packaging is heat sealable to another coextrusion face of the packaging without substantial amounts of squeeze out at a rate of 400 units/minute.
10. The packaging of claim 1, wherein the coextrusion is formable using a two resin capable coextruder.
11. The packaging of claim 1, wherein the ethylene vinyl alcohol layer has a melting temperature in excess of a layer of the coextrusion containing a tie resin.
12. The packaging of claim 1, wherein the paper substrate further comprises a treated surface attached to the coextrusion, the treated surface promoting adhesion of the ethylene vinyl alcohol layer to the paper substrate.
13. The packaging of claim 1, wherein the ethylene vinyl alcohol layer includes ethylene in a range of 24 to 48 mole percent.
14. The packaging of claim 13, wherein the ethylene vinyl alcohol layer includes 35 mole percent ethylene.
15. A method of making packaging for a tea pouch, the method comprising:
providing a paper substrate;
extruding a coextrusion including a layer of ethylene vinyl alcohol; and attaching the coextrusion onto the paper substrate such that the layer of ethylene vinyl alcohol is directly attached to the paper substrate.
16. The method of claim 15, further comprising the step of treating a surface of the paper substrate to be attached to the layer of ethylene vinyl alcohol before attaching the coextrusion thereby promoting adhesion between the paper substrate and the coextrusion.
17. The method of claim 16, wherein the step of treating the surface includes flame treating.
18. The method of claim 16, wherein the step of treating the surface includes corona treating.
19. The method of claim 16, wherein the step of treating the surface includes liquid priming.
20. The method of claim 15, wherein the coextrusion includes a layer of tie sealant resin blend coextruded with the layer of ethylene vinyl alcohol.
21. The method of claim 20, wherein the extrusion step is performed with a two resin capable extruder.
22. The method of claim 15, wherein the coextrusion includes a layer of tie resin and a layer of sealant coextruded with the layer of ethylene vinyl alcohol.
23. The method of claim 15, further comprising the step of attaching a polymeric layer and another paper layer to a side of the paper substrate not attached to the coextrusion such that the polymeric layer is sandwiched between the paper substrate and the other paper layer thereby forming an improved barrier.
24. The method of claim 15, wherein the coextrusion is asymmetrical.
25. A tea pouch comprising:
at least one ply of packaging comprising a paper substrate and a coextrusion including an ethylene vinyl alcohol layer in which the ethylene vinyl alcohol layer is directly attached to the paper substrate, the coextrusion further comprising a tie resin and a sealant;
a seal formed about at least a portion of the periphery of the tea pouch to form an inner volume for storage of a tea product;
wherein the seal is a heat seal formed by the application of heat and pressure the at least one ply of packaging.
26. The tea pouch of claim 25, wherein the ethylene vinyl alcohol layer is directly attached to the paper substrate along a paper substrate - ethylene vinyl alcohol layer interface.
27. The tea pouch of claim 25, wherein the paper substrate comprises cellulosic fibers.
28. The tea pouch of claim 25, wherein the coextrusion further comprises a tie sealant resin blend layer on the side of the ethylene vinyl alcohol layer not directly attached to the paper substrate.
29. The tea pouch of claim 25, wherein the coextrusion further comprises, on a side of the ethylene vinyl alcohol layer not directly attached to the substrate, a tie resin layer and a sealant layer, the tie resin layer being disposed at least in part between the ethylene vinyl alcohol layer and the sealant layer.
30. The tea pouch of claim 25, wherein the coextrusion is asymmetrical.
31. The tea pouch of claim 25, further comprising a polymeric barrier layer attached to a side of the paper substrate that is not directly attached to the coextrusion and further comprising another paper layer attached to the polymeric barrier layer such that the polymeric barrier layer is sandwiched between the paper substrate and the other paper layer.
32. The tea pouch of claim 31, wherein the polymeric barrier layer is selected from a group consisting of polyethylene and polypropylene.
33. The tea pouch of claim 25, wherein a coextrusion face of the packaging is heat sealable to another coextrusion face of the packaging without substantial amounts of squeeze out at a rate of 400 units/minute.
34. The tea pouch of claim 25, wherein the coextrusion is formable using a two resin capable coextruder.
35. The tea pouch of claim 25, wherein the ethylene vinyl alcohol layer has a melting temperature in excess of a layer of the coextrusion containing a tie resin.
36. The tea pouch of claim 25, wherein the paper substrate further comprises a treated surface attached to the coextrusion, the treated surface promoting adhesion of the ethylene vinyl alcohol layer to the paper substrate.
37. The tea pouch of claim 25, wherein the ethylene vinyl alcohol layer includes ethylene in a range of 24 to 48 mole percent.
38. The tea pouch of claim 37, wherein the ethylene vinyl alcohol layer includes 35 mole percent ethylene.
CA2797763A 2010-01-19 2011-01-18 Packaging for a tea pouch Abandoned CA2797763A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US29632110P 2010-01-19 2010-01-19
US61/296,321 2010-01-19
PCT/US2011/021535 WO2011090936A1 (en) 2010-01-19 2011-01-18 Packaging for a tea pouch

Publications (1)

Publication Number Publication Date
CA2797763A1 true CA2797763A1 (en) 2011-07-28

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CA2797570A Abandoned CA2797570A1 (en) 2010-01-19 2011-01-18 Packaging and method of making packaging
CA2797763A Abandoned CA2797763A1 (en) 2010-01-19 2011-01-18 Packaging for a tea pouch

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CA2797570A Abandoned CA2797570A1 (en) 2010-01-19 2011-01-18 Packaging and method of making packaging

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US (3) US9610755B2 (en)
CA (2) CA2797570A1 (en)
WO (2) WO2011090936A1 (en)

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US20130040155A1 (en) 2013-02-14
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US9610755B2 (en) 2017-04-04
CA2797570A1 (en) 2011-07-28
US20130037556A1 (en) 2013-02-14

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