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US 5,958,531 AGranted
Peelable and heat sealable lidstock material for steel end containers
AssigneeAluminum Company of America
InventorJames A. Stevenson
Life of this patent
Estimating the term…
Abstract
A peelable and heat sealable lidstock material for steel end containers. The container of the invention is suitable for holding various foods, including instant coffee, powdered baby formula and soup mixes. The lidstock material includes a film containing an ethylene-carboxylic acid copolymer, polybutylene and a particulate inorganic filler.
Claims17
A film suitable for lamination with a metal or polymer substrate to form a lidstock material characterized by a cohesive peel when heat sealed to steel, said film comprising:
- (a) about 35-70 wt. % of an ethylene-carboxylic acid copolymer;
- (b) about 10-40 wt. % polybutylene;
- and
- (c) at least about 18 wt. % of a particulate inorganic filter.
1 more element
A container comprising:
- (a) a body having an upper edge portion defining an opening, said upper edge portion comprising a metal selected from steel and aluminum;
- and
- (b) a lid comprising a metal or polymer substrate heat sealed to said upper edge portion by a cohesively feeling film comprising:
- (i) about 35-70 wt. % of an ethylene-carboxylic acid copolymer;
- (ii) about 10-40 wt. % of a polybutylene;
- and
- (iii) at least about 18 wt. % of a particulate inorganic filler.
4 more elements
Dependencies are inferred from the claim text.