초록 ▼

Film-forming formulations comprising starch, ethylene acrylic acid copolymer, and optionally polyethylene, can be blown into films upon neutralization of a portion of the copolymer acid functionality. The resultant biodegradable films have potential application as agricultural mulch, garbage bags, a

Film-forming formulations comprising starch, ethylene acrylic acid copolymer, and optionally polyethylene, can be blown into films upon neutralization of a portion of the copolymer acid functionality. The resultant biodegradable films have potential application as agricultural mulch, garbage bags, and various types of packaging.

대표청구항 ▼

In a method of producing a flexible, self-supporting, and biodegradable film wherein a mixture comprising a partially or completely gelatinized starchy material in an amount up to 60% by weight and an ethylene acrylic acid copolymer is converted into a plasticized matrix and then shaped into said fi

In a method of producing a flexible, self-supporting, and biodegradable film wherein a mixture comprising a partially or completely gelatinized starchy material in an amount up to 60% by weight and an ethylene acrylic acid copolymer is converted into a plasticized matrix and then shaped into said film, the improvement comprising the following steps: a. incorporating into said matrix a neutralizing agent selected from the group of aqueous ammonia and anhydrous ammonia; b. adjusting the moisture content of said matrix to within the range of about 2-10% based on the weight of the matrix; and c. extrusion blowing said ammoniated and moisture-adjusted matrix into a film.