CA2321033A1 - Stack-sealable, heat-shrinkable multilayer packaging film - Google Patents

Stack-sealable, heat-shrinkable multilayer packaging film Download PDF

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Publication number
CA2321033A1
CA2321033A1 CA002321033A CA2321033A CA2321033A1 CA 2321033 A1 CA2321033 A1 CA 2321033A1 CA 002321033 A CA002321033 A CA 002321033A CA 2321033 A CA2321033 A CA 2321033A CA 2321033 A1 CA2321033 A1 CA 2321033A1
Authority
CA
Canada
Prior art keywords
layer
heat
film
permits
shrinkable multilayer
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.)
Granted
Application number
CA002321033A
Other languages
French (fr)
Other versions
CA2321033C (en
Inventor
Ram K. Ramesh
John R. Wolf
George D. Wofford
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.)
Cryovac LLC
Original Assignee
Cryovac, Inc.
Ram K. Ramesh
John R. Wolf
George D. Wofford
W.R. Grace & Co.-Conn.
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 Cryovac, Inc., Ram K. Ramesh, John R. Wolf, George D. Wofford, W.R. Grace & Co.-Conn. filed Critical Cryovac, Inc.
Publication of CA2321033A1 publication Critical patent/CA2321033A1/en
Application granted granted Critical
Publication of CA2321033C publication Critical patent/CA2321033C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1328—Shrinkable or shrunk [e.g., due to heat, solvent, volatile agent, restraint removal, etc.]
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]

Landscapes

  • Laminated Bodies (AREA)
  • Wrappers (AREA)
  • Packages (AREA)

Abstract

A heat-shrinkable multilayer film comprises (A) a first layer, which is an outer layer, and which comprises polyolefin; (B) a second layer comprising at least one member selected from the group consisting of polyolefin, polystyrene, and polyurethane, wherein the second layer has a thickness of from about 10 to 50 percent, based on a total film thickness; (C) a third layer comprising a polyamide having a melting point of 160 °C and below; and (D) a fourth layer, which is an outer layer, the fourth layer comprising polyester. The first layer preferably serves as a seal layer in a heat-shrinkable bag. The third layer provides enhanced orientability of the tape from which the film is formed, thereby providing improved total free shrink and lower shrink temperature. The third layer also provides greater optical clarity and permits the presence of a thicker polyamide layer, thereby increasing impact strength and improving the O2-barrier of the film. The high melting polyester of the fourth layer permits at least two bags, having product therein, to be stacked on top of one another and sealed simultaneously, without sticking to one another, thereby doubling the output of a vacuum chamber machine. A bag and a process of making a packaged product are also disclosed.
CA002321033A 1998-03-04 1999-03-04 Stack-sealable, heat-shrinkable multilayer packaging film Expired - Fee Related CA2321033C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US3441098A 1998-03-04 1998-03-04
US09/034,410 1998-03-04
PCT/US1999/004842 WO1999044824A1 (en) 1998-03-04 1999-03-04 Stack-sealable, heat-shrinkable multilayer packaging film

Publications (2)

Publication Number Publication Date
CA2321033A1 true CA2321033A1 (en) 1999-09-10
CA2321033C CA2321033C (en) 2008-12-30

Family

ID=21876226

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002321033A Expired - Fee Related CA2321033C (en) 1998-03-04 1999-03-04 Stack-sealable, heat-shrinkable multilayer packaging film

Country Status (10)

Country Link
US (1) US7207157B2 (en)
EP (1) EP1060077B1 (en)
AT (1) ATE243114T1 (en)
AU (1) AU755801B2 (en)
CA (1) CA2321033C (en)
DE (1) DE69908915T2 (en)
DK (1) DK1060077T3 (en)
ES (1) ES2203084T3 (en)
NZ (1) NZ506122A (en)
WO (1) WO1999044824A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107715703A (en) * 2017-11-08 2018-02-23 厦门世脉科技有限公司 A kind of process units and method of MULTILAYER COMPOSITE Flat Membrane

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107715703A (en) * 2017-11-08 2018-02-23 厦门世脉科技有限公司 A kind of process units and method of MULTILAYER COMPOSITE Flat Membrane
CN107715703B (en) * 2017-11-08 2023-10-27 厦门世脉科技有限公司 Production device and method of multilayer composite flat plate film

Also Published As

Publication number Publication date
US20030012900A1 (en) 2003-01-16
ES2203084T3 (en) 2004-04-01
DE69908915D1 (en) 2003-07-24
ATE243114T1 (en) 2003-07-15
WO1999044824A1 (en) 1999-09-10
DK1060077T3 (en) 2003-10-06
EP1060077B1 (en) 2003-06-18
NZ506122A (en) 2003-11-28
AU755801B2 (en) 2002-12-19
AU2896199A (en) 1999-09-20
CA2321033C (en) 2008-12-30
EP1060077A1 (en) 2000-12-20
DE69908915T2 (en) 2004-05-13
US7207157B2 (en) 2007-04-24

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