MULTILAYERED TUBE-SHAPED PLASTIC FOOD WRAP Russian patent published in 2013 - IPC A22C13/00 B32B1/08 B32B27/30 B32B27/32 B32B27/34 

FIELD: personal use articles.

SUBSTANCE: invention relates to multilayered tube-shaped plastic food wrap, in particular - to sausage casing. The multilayered tube-shaped plastic food wrap is manufactured on an instillation for production of multilayered plastic wrap by way of coextrusion with blowing through simultaneous delivery of the polymers to be jointly extruded to the blow head and biaxial stretching by the triple blowing method. The plastic food wrap contains at least six layers. The said at least six layers of the plastic food wrap are positioned in the direction from the outside to the inside as follows: the most outward layer consisting polyamide as the layer component, the most inward layer consisting polyamide as the layer component and a sequence of at least four intermediary layers, positioned between them, in the direction from the outside to the inside, as follows: one layer containing an adhesion boosting agent as the layer component, the next layer containing polyolefin as the layer component, the next layer containing polyolefin as the layer component and one more layer containing an adhesion boosting agent as the layer component.

EFFECT: tube-shaped plastic food wrap ensures long-term preservation of packaged food products (including those having high moisture content) and is characterised by optimal shrinkage and a high expandability factor.

18 cl, 3 tbl