Flexible packaging peelable seal system
AssigneePechiney Emballage Flexible Europe
InventorsLisa King Gerrits, Russell P. Gehrke, Paul T. Greisinger
Life of this patent
Estimating the term…
Abstract
Multilayer films and packaging structure made therefrom which incorporate a peelable seal which operates via two peel mechanisms which are temperature dependent. The multilayered films and the packages in which they are utilized, have multiple layers including a fifth layer comprising high density polyethylene; a fourth layer comprising high density polyethylene, a third layer comprising high density polyethylene; a second layer comprising high density polyethylene and polybutylene and a first layer comprising ethylene vinyl acetate copolymer, polyethylene plastomer and polybutylene.
Claims24
An easy open, peelable seal package comprising:
- a first package wall having a multilayer film construction, said multilayer film construction comprising a first layer comprising ethylene vinyl acetate copolymer, plastomer and polybutylene;
- a second layer comprising high density polyethylene and polybutylene;
- a third layer comprising a single polymeric material or a blend of polymeric material;
- a fourth layer comprising a single polymeric material or a blend of polymeric material and a fifth layer comprising a single polymeric material or a blend of polymeric material;
- and
- a second package wall joined at a portion of its perimeter to said first package wall;
- wherein said first layer of said first package wall is heat sealed to said second package wall to create a sealed package such that a surface bond is formed between said first layer of said first package wall and said second package wall having a greater bond strength than a cohesive bond between the interface of said first layer and said second layer of said first package wall such that upon application of digital pull apart force said first and second package walls will remain bonded together and peeling will occur at said cohesive bond or peeling will occur at said surface bond between the interface of said first layer and first layer of said second package wall.
A multilayer film construction comprising a first layer comprising ethylene vinyl acetate copolymer, plastomer and polybutylene;
- a second layer comprising high density polyethylene and polybutylene;
- a third layer comprising a single polymeric material or a blend of polymeric materials;
- a fourth layer comprising a single polymeric material or a blend of polymeric material and a fifth layer comprising a single polymeric material or a blend of polymeric materials.
A multilayer film construction comprising:
- a first layer comprising ethylene vinyl acetate copolymer, plastomer and polybutylene which is adjacent to a second layer comprising high density polyethylene and polybutylene.
Dependencies are inferred from the claim text.