Film and sheet capable of forming retortable and easy-open packagings

Patent · Tue Oct 24 04:00:00 EDT 1989

OSTI ID:7008048

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This patent describes a laminar structure comprising a polypropylene substrate which is bonded by extrusion lamination a film or sheet which is capable of forming peel seals. It comprises a mixture containing: from about 5 percent by weight to about 25 percent by weight of an ethylenic homopolymer or copolymer selected from the group consisting of linear low density polyethylene (LLDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE), ethylene vinyl acetate copolymer (EVA), ethylene-methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA), ethylene-butyl acrylate copolymer (EBA), and high density polyethylene (HDPE); from about 50 percent by weight to about 75 percent by weight of the butene-1 homopolymer or copolymer; and from about 25 percent by weight to about 45 percent by weight of propylene homopolymer or copolymer.

• Assignee: Shell Oil Co., Houston, TX
• Patent Number(s): US 4876156
• Application Number: PPN: US 7285567A
• OSTI ID: 7008048
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACETATES
ACRYLATES
ALKENES
BUTENES
CARBOXYLIC ACID SALTS
CHEMICAL COMPOSITION
DESIGN
FABRICATION
HYDROCARBONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYPROPYLENE
POLYVINYLS
PROPYLENE
SEALS
SHEETS
SUBSTRATES