Patent ID: 6146750
Filing Date: 2000-11-14
Classification: B32B,C08J,C08K,Y10T

Abstract:
A biodegradable resin film having at least two layers having:a first biodegradable layer comprising the composition which comprises:a biodegradable resin which is capable of being biodegraded by the action of a microorganism, said biodegradable resin is a hydrogen-bonded resin wherein said hydrogen-bonded resin has 10% to 60% by weight of hydrogen-bonding groups selected from the group consisting of hydroxyl groups, amino groups, amide groups and thiol groups, andan inorganic laminar compound having aspect ratio (Z) of from 100 to 3000, wherein the aspect ratio (Z) is defined by the equation (Z)=L/(a), wherein L represents the particle diameter of the inorganic laminar compound measured in a solvent by a dynamic light scattering method, and (a) represents the unit thickness of the inorganic laminar compound measured by powder x-ray diffraction, and wherein said inorganic laminar compound is swollen or cleft in a solvent; anda second biodegradable layer comprising a material selected from the group consisting of polyester poly-3-hydroxybutyrate, 3-hydroxybutyrate-3-hydroxyvalerate copolymers, chitin, and chitosan.