MULTILAYER SLEEVE OR FLAT SHELL OR FILM Russian patent published in 2020 - IPC B32B27/36 B32B27/32 B32B27/34 B29C48/10 B29C48/16 B65D65/40 A22C13/00 

FIELD: packaging and storage.

SUBSTANCE: invention relates to multilayer hose or flat shells or films for packing meat and meat products, manufactured by coextrusion and stretched along two axes by triple blowing, in form of shrinkable package, heat-sealing film or overwrap film. Multilayer hose or flat shell or a film for packing meat or meat products, manufactured by coextrusion and elongated in two axes by a triple blowing method, comprises nine layers, counting from outside to inside: first layer of multilayer hose or flat shell or film consists of polyethylene terephthalate (PET), second layer consists of mixture of polyamide (PA) with amorphous polyamide (APA) in ratio of 85:15 wt% respectively, third layer consists of maleic anhydride-modified linear polyethylene (Tie) and nanoclay, at a ratio, wt%: 99.99–99.00 and 0.01–1.0 respectively, fourth layer consists of polyamide (PA), fifth layer consists of ethylene and vinyl alcohol (EVOH) copolymer, sixth layer consists of polyamide (PA), seventh layer consists of maleic anhydride-modified linear polyethylene (Tie), eighth layer consists of polyethylene, which is preferred as polyolefin (POP) plastomer, and nanoclay at ratio, wt%: 99.99–99.00 and 0.01–1.0 respectively, and the ninth layer consists of polyethylene (PE).

EFFECT: invention allows reducing the level of free shrinkage of multilayer hose or flat shells or films up to 10 times and increasing the level of working shrinkage by 1,25 times.

1 cl, 7 tbl, 5 ex