Biodegradable polymer films and sheets suitable for use as laminate coatings as well as wraps and other packaging materials

A biodegradable polymer blend in the form of a sheet or film, comprising:

• at least one synthetic biodegradable polymer having a glass transition temperature greater than about 10° C.;
• and
• at least one biodegradable polymer having a glass transition temperature less than about 0° C.,
• wherein the biodegradable sheet or film is textured so as to have dead-fold properties such that, once folded, wrapped or otherwise manipulated into a desired orientation, the sheet or film substantially maintains its orientation.

A biodegradable polymer blend in the form of a sheet or film, comprising:

• at least one synthetic biodegradable polymer having a glass transition temperature greater than about 10° C.;
• at least one biodegradable polymer having a glass transition temperature less than about 0° C.;
• and
• at least one particulate filler in an amount so that the sheet or film has dead-fold properties such that, once folded, wrapped or otherwise manipulated into a desired orientation, the sheet or film substantially maintains its orientation.

A biodegradable polymer blend in the form of a sheet or film, comprising:

• at least one stiff synthetic biodegradable polymer selected from the group consisting of modified polyethylene terephthalates, polyesteramides, polylactic acid, polylactic acid derivatives, polyalkylene carbonates, polyhydroxybutyrate, and terpolymers of polylactic acid, polyglycolic acid, and polycaprolactone;
• at least one soft synthetic biodegradable polymer selected from the group consisting of aliphatic-aromatic copolyesters, polyhydroxyvalerate, polyhydroxyvalerate-hydroxybutyrate copolymers, polybutylene succinate, polybutylene succinate reacted with hexamethyl diisocyanate, polybutylene succinate adipate, polyethylene succinate, polyethylene succinate reacted with hexamethyl diisocyanate, and other succinate-based aliphatic polymers;
• and
• optionally at least one of a particulate filler, fibrous filler, cellulose-based polymer, protein-based polymer, polysaccharide gum, nonbiodegradable polymer, or plasticizer,
• wherein the stiff biodegradable polymer is included in an amount of about 20% to about 99% by combined weight of the stiff and soft biodegradable polymers,
• wherein the soft biodegradable polymer is included in an amount of about 1% to about 80% by combined weight of the stiff and soft biodegradable polymers.

A biodegradable polymer blend, comprising:

• at least one stiff synthetic biodegradable polymer having a glass transition temperature greater than about 10° C.;
• and
• at least one soft synthetic biodegradable polymer having a glass transition temperature less than about 0° C. and comprising at least one aliphatic-aromatic copolyester comprising units formed from at least one type of aliphatic diol, at least one type of aliphatic diacid, and at least one type of aromatic diacid;
• wherein the polymer blend is suitable for formation into at least one of sheets or films.