Packaging material for controlled atmosphere packaging

• US 5,254,401 A
• Filed: 11/29/1990
• Issued: 10/19/1993
• Est. Priority Date: 11/29/1990
• Status: Expired due to Fees

• Current Assignee: The Dow Chemical Company (Dow, Inc.)
• Original Assignee: The Dow Chemical Company (Dow, Inc.)
• Inventors: Kelch, Robert H., Zabrocki, Vincent S.
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Brown, Christopher
• Application Number:
  US07/619,574
• Time in Patent Office: 1,055 Days
• Field of Search: 428/317.1, 428/317.3, 428/317.5, 428/35.5, 428/319.7, 428/317.7, 428/507, 428/511, 426/127, 426/415, 426/419
• US Class Current: 428/317.1
• CPC Class Codes: B32B 2266/06 Open cell foam
• CPC Class Codes: B32B 2317/12 Paper, e.g. cardboard
• CPC Class Codes: B32B 2553/00 Packaging equipment or accessories not otherwise provided for
• CPC Class Codes: B32B 27/065 of foam
• CPC Class Codes: B32B 27/10 of paper or cardboard
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: Y10T 428/249982 With component specified as adhesive or bonding agent
• CPC Class Codes: Y10T 428/249984 Adhesive or bonding component contains voids
• CPC Class Codes: Y10T 428/249985 Composition of adhesive or bonding component specified
• CPC Class Codes: Y10T 428/249992 Linear or thermoplastic
• CPC Class Codes: Y10T 428/3188 Next to cellulosic
• CPC Class Codes: Y10T 428/31895 Paper or wood

Abstract

A packaging material useful for the controlled atmosphere packaging in bulk of fresh produce, comprising a liner material and a supporting cardboard substrate, wherein the liner material comprises an open cell foamed adhesive portion and a substantially solid thermoplastic film portion in face-to-face relationship.

Claims

1. A packaging material useful for the controlled atmosphere packaging in bulk of ripened produce, consisting essentially of a liner material and a supporting cardboard substrate, wherein the liner material consists of an open cell foamed adhesive layer of one or more ethylene acrylic acid copolymer adhesives and a substantially solid thermoplastic film layer of polyethylene or polystyrene in face to face relationship.

2. A package formed form the packaging material of claim 1.

3. A package as defined in claim 13 which, when filled with ripened produce at refrigeration conditions, produces an atmosphere possessing an equilibrium concentration of from about 2 to about 8 percent by volume of oxygen, with from about 0 to about 20 percent by volume of carbon dioxide.