MULTI-LAYER FILMS WITH IMPROVED PROPERTIES

摘要

A method of improving hot tack and/or seal strength in a multi-layer film by selecting a first PE comprising at least one of mPE, LDPE or LLDPE to form a first layer and selecting a blend comprising a mPE and a PP to form an outer layer; and coextruding the first PE and the blend to form the multi-layer film comprising the first layer and the outer layer; wherein the inner layer comprises at least one component having a final melting point at least about 15 °C higher than a final melting point of at least one component of the first layer, wherein the multi-layer film has a maximum hot tack at least about 25 % greater than a similar multi-layer film with 0-weight % of the PP in the inner layer.