BLISTER PACK Russian patent published in 2021 - IPC B65D81/32 B65D75/34 

FIELD: packaging industry.

SUBSTANCE: blister pack comprises a laminated substrate with a sealing layer and a laminated coating with a sealing layer. Laminated substrate has at least one recess accommodating the product. Laminated substrate and laminated coating are directly connected to each other through their sealing layers, connection contains two different subareas of connection. First connection subband provides a permanent connection, and the second connection subzone provides a peelable connection. Sealing layer contains a mixture of polyethylene and several functionalised ethylene copolymers. Functionalised ethylene copolymers are copolymers of ethylene and an unsaturated comonomer having an organic functional group containing a carbon atom, bonded with a double bond to an oxygen atom and bonded to an additional oxygen atom.

EFFECT: invention enables to create different connection zones having different strength of connection, which allows obtaining peelable connection and permanent connection.

10 cl, 7 dwg