AUTOCLAVABLE PACKAGING FILM Russian patent published in 2025 - IPC B32B27/06 B32B27/08 B32B27/32 

FIELD: packing and storage.

SUBSTANCE: invention relates to an autoclavable packaging film, a hermetically sealed packaged food product containing an autoclavable packaging film, and a method of producing an autoclavable packaging film. Autoclavable packaging film contains a laminate containing a biaxially oriented polypropylene (BOPP) film and a machine direction oriented polypropylene (MDOPP) film. Packaging film contains a sealing layer placed on a laminate, which contains a mixture containing a polypropylene terpolymer and a long-chain branched polyethylene selected from a group consisting of low-density polyethylene (LDPE) and medium-density polyethylene (MDPE). Melt flow index of the sealing layer is from 5 to 25 g/10 min in accordance with ASTM D1238, procedure A, conditions 230 °C/load 2.16 kg.

EFFECT: invention enables to obtain an autoclavable packaging film containing high levels of polyolefin, which complies with the recycling recommendations, has high strength of connection and is sufficiently strong for processing by autoclaving and exhibits ability to break in a straight line in one direction to facilitate opening of autoclavable packages without the need for visible elements, for example, cuts.

16 cl, 8 dwg, 1 tbl