SHRINK FILM "FORSPLAST-THERMO" Russian patent published in 2016 - IPC B32B27/00 C08J5/18 C08J9/04 

FIELD: packaging industry.

SUBSTANCE: invention relates to processing of plastics and may be used in production of films, sheets. Shrink film may be used for packing of large-size and non-standard cargoes, when the packaging materials should have high strength and heat-shrinkable properties. Polymer t/in film consisting of two layers is performed by co-extrusion or other existing methods, using which there appears the orientation of different-composition layers of polymer material, which provides shrink properties and leads to formation of different structure of layers. One layer in the form of solid shrinkable film has a degree of orientation in longitudinal and transverse directions according to the parameters of shrinkage of the corresponding type shrinkable film, and the second layer is oriented in longitudinal and transverse directions, but has irregular mesh structure.

EFFECT: this enables cheap and functional package taking into account features of cargo, considerably increasing its strength and reduce the polymer material.

1 cl, 1 ex