Patent ID: 8268419

Claim:
A polypouch for packaging of mineral oils having negligible permeation loss of packed mineral oils comprising: a multilayered polymeric sheet or film of optimized thickness comprising a nylon layer or a barrier layer ( 3 ) which is sandwiched between two low density/linear low density polyethylene outer and inner layers ( 1 , 5 ), each adhesive resin layers or tie layers ( 2 , 4 ) being sandwiched between each low density/linear low density polyethylene layer( 1 , 5 ) and nylon or barrier layer ( 3 ); wherein said sheet or film is formed by co-extruding the layers in a percent by weight combination such that the nylon layer or barrier layer ( 3 ) is 2-25% by weight of nylon, the adhesive resin layers or tie layers ( 2 , 4 ) are 3 to 18% by weight of adhesive resin, and the low density/linear low density polyethylene outer and inner layers ( 1 , 5 ) are 10 to 70% by weight of low density/linear low density polyethylene.