Highly-breathable biodegradable film bag

摘要

Bag made of a breathable biodegradable uniform film having thickness from 10 to 40 μm and with permeability to water greater than 950 g 30 μm/m2 24 h in which the biodegradable film comprises starch and possibly a thermoplastic polymer insoluble in water with melting temperature between 60° C. and 150° C.

主权项

1. A bag made of a breathable biodegradable uniform film comprising starch blended with an aliphatic-aromatic polyester of the diacid-diol type, wherein the amount of starch is between 25% and 60% of the total composition, said film having a thickness of from 10 to 40 μm, a permeability to water greater than 950 g 30 μm/m2 24 h, and the following tensile properties measured on 25-30 μm films at 23° C. and 55% RH: ultimate tensile strength greater than 16 MPa, modulus >50 MPa, and ultimate elongation >300%.