Patent ID: 9447247
Filing Date: 2016-09-20
CPC Classification: A61L,B05D,B29B,B29C,B29K,B29L,B32B,C08J,C08K,C08L,C09J,Y10T

Claim Text:
1. A non-breathable film obtained by extrusion comprising a base polymer dosed in a mass proportion between 30% and 70% by weight, loaded with mineral particles dosed in a mass proportion between 70% and 30% by weight covered by a fatty acid in a mass proportion between 0.1% and 0.5% by weight with regard to the mineral particles, and partially adhered to the base polymer by means of an adhesive formed from co-polymers of the base polymer grafted with polar groups comprising maleic anhydride or acrylic add, dosed in a mass proportion between 1% and 5% by weight, wherein the average size of the mineral particles is between 0.5 and 4 microns, and wherein said film has a micro-porous structure with a pore size of between 0.2 and 5 microns and the pores are not joined to each other, wherein the base polymer is a polyolefin selected from the group consisting of polypropylene, high density polyethylene, medium density polyethylene, and low density polyethylene.