US 7,320,773 B2
Biodegradable laminate sheet and molded item from biodegradable laminate sheet
Yosuke Egawa, Nagahama (Japan)
Assigned to Mitsubishi Plastics, Inc., Tokyo (Japan)
Appl. No. 10/520,744
PCT Filed Jul. 10, 2003, PCT No. PCT/JP03/08821
§ 371(c)(1), (2), (4) Date Aug. 17, 2005,
PCT Pub. No. WO2004/007197, PCT Pub. Date Jan. 22, 2004.
Claims priority of application No. 2002-202710 (JP), filed on Jul. 11, 2002; and application No. 2002-304281 (JP), filed on Oct. 18, 2002.
Prior Publication US 2006/0040119 A1, Feb. 23, 2006
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 37/14 (2006.01); B32B 37/15 (2006.01); B32B 37/16 (2006.01); B32B 38/00 (2006.01); B32B 7/00 (2006.01)
U.S. Cl. 264—331.11  [428/212; 428/480; 264/173.11; 264/173.12; 264/173.15; 264/173.16; 264/210.1; 264/241; 264/280; 264/285; 264/288.4; 264/291; 264/299; 264/319; 264/330; 264/331.21; 156/244.11; 156/244.24] 6 Claims
 
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.