Patent ID: 9511569
Filing Date: 2016-12-06
CPC Classification: B32B,Y10T

Claim Text:
1. A multilayer film structure comprising a first layer, a tie layer, and at least one additional layer wherein the first layer is made of a bio-based polymer composition, said bio-based polymer comprising a poly(hydroxyalkanoic acid) (PHA) or a bio-based polyester; the tie layer is adjacent to and lies between the first layer and the additional layer; the tie layer includes 50 to 95 wt %, based on the weight of the tie layer, of an ethylene copolymer and 5 to 50 wt % of a filler; the ethylene copolymer is selected from the group consisting of ethylene methyl (meth)acrylate copolymer, ethylene ethyl (meth)acrylate copolymer, ethylene butyl (meth)acrylate copolymer, and combinations of two or more thereof; the filler is talc, calcium carbonate, calcinated clay, mica, zinc borate, or combinations of two or more thereof; the additional layer is selected from the group consisting of a heat sealable layer, a foil, a paperboard, a nonwoven material, and combinations of two or more thereof; and the heat sealable layer is selected from the group consisting of poly(hydroxyalkanoic acid), glycoside, polyethylene, polypropylene, polyester, polyamide, ethylene vinyl acetate copolymer, ethylene alkyl (meth)acrylate copolymer, ethylene acid copolymers, ionomers, and combinations of two or more thereof.