Poly (lactic acid) base polymer composition, molding thereof and film
AssigneeToray Industries, Inc.
InventorsTaisei Matsumoto, Hiroshi Shinnumadate, Sadanori Kumazawa, Masahiro Kimura
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Abstract
Poly(lactic acid) polymer compositions each contain an appropriate poly(lactic acid) polymer and a suitable plasticizer having a polyether and/or polyester segment in combination. The composition exhibit satisfactory flexibility and show very small amount of the evaporation, migration and extraction (bleedout) of the plasticizer and losing transparency upon heating. The poly(lactic acid) polymer compositions are useful as formed plastics such as films.
Claims15
A film formed from a formed plastic comprising a poly(lactic acid) polymer composition comprising a) a poly(lactic acid) polymer exhibiting crystallinity, and b) a plasticizer having at least one poly(lactic acid) segment with a number-average molecular weight of 1200 or more per molecule and a polyether segment, and wherein the film has a tensile modulus of elasticity of 100 to 1500 MPa.
A film formed from a formed plastic comprising a poly(lactic acid) polymer composition comprising a) a poly(lactic acid) polymer exhibiting crystallinity, b) a poly(lactic acid) polymer exhibiting no crystallinity, and c) a plasticizer having a polyether segment and having no poly(lactic acid) segment with a number-average molecular weight of 1200 or more, and wherein the film has a tensile modulus of elasticity of 100 to 1500 MPa.
A film formed from a formed plastic comprising a poly(lactic acid) polymer composition comprising a) a poly(lactic acid) polymer exhibiting crystallinity and having a melting point lower than 145° C., and b) a plasticizer having a polyether segment and having no poly(lactic acid) segment with a number-average molecular weight of 1200 or more, and wherein the film has a tensile modulus of elasticity of 100 to 1500 MPa.
A film formed from a formed plastic comprising a poly(lactic acid) polymer composition comprising a) a poly(lactic acid) polymer exhibiting no crystallinity, and b) a plasticizer comprising a polyether segment, the composition containing no poly(lactic acid) polymer exhibiting crystallinity, and the film has a tensile modulus of elasticity of 100 to 1500 MPa.
Dependencies are inferred from the claim text.