초록 ▼

A biodegradable laminate sheet having as its object to provide a formed body superior in heat resistance, shock resistance, transparency and formability, and having non-stretched polylactic acid-family resin layer of which the crystallinity is 20% or less, and a layer comprising a biodegradable resi

A biodegradable laminate sheet having as its object to provide a formed body superior in heat resistance, shock resistance, transparency and formability, and having non-stretched polylactic acid-family resin layer of which the crystallinity is 20% or less, and a layer comprising a biodegradable resin other than a polylactic acid-family resin.

대표청구항 ▼

The invention claimed is: 1. A method of forming a biodegradable laminate sheet which comprises a non-stretched polylactic acid-family resin layer of which the crystallinity is 20% or less, and a layer comprising a biodegradable resin other than a polylactic acid-family resin having a glass transit

The invention claimed is: 1. A method of forming a biodegradable laminate sheet which comprises a non-stretched polylactic acid-family resin layer of which the crystallinity is 20% or less, and a layer comprising a biodegradable resin other than a polylactic acid-family resin having a glass transition temperature of 0�� C. or less and a melting point of 80�� C. or higher, wherein said method comprises forming said biodegradable laminate sheet at a temperature higher than the melting point of said biodegradable resin other than a polylactic acid-family resin. 2. A method according to claim 1, wherein said biodegradable laminate sheet comprises outer layers comprising said biodegradable resin other than a polylactic acid-family resin, and at least one non-stretched layer comprising said polylactic acid-family resin sandwiched between said outer layers. 3. A method according to claim 2, wherein said non-stretched polylactic acid-family resin layer and said layer comprising a biodegradable resin other than a polylactic acid-family resin are laminated by co-extrusion. 4. A method according to claim 1, wherein said biodegradable laminate sheet comprises non-stretched outer layers comprising said polylactic acid-family resin, and at least one layer comprising said biodegradable resin other than a polylactic acid-family resin sandwiched between said outer layers. 5. A method according to claim 4, wherein said non-stretched polylactic acid-family resin layer and said layer comprising a biodegradable resin other than a polylactic acid-family resin are laminated by co-extrusion. 6. A method according to claim 1, wherein said non-stretched polylactic acid-family resin layer and said layer comprising a biodegradable resin other than a polylactic acid-family resin are laminated by co-extrusion.