公开(公告)号：US06214452B1

公开(公告)日：2001-04-10

申请号：US09276272

申请日：1999-03-25

申请人： Rotraut Albrecht ,  Sivio Boettcher ,  Gernod Haerter ,  Peter Pawlak ,  Heinrich Erich Schwartze ,  Heike Zuleg

发明人： Rotraut Albrecht ,  Sivio Boettcher ,  Gernod Haerter ,  Peter Pawlak ,  Heinrich Erich Schwartze ,  Heike Zuleg

IPC分类号： B32B702

CPC分类号： C08J5/18 ,  C08J2303/04 ,  C08J2303/08 ,  C08L3/04 ,  C08L3/08 ,  C08L3/14 ,  C08L3/18 ,  Y10T428/254 ,  Y10T428/31971

摘要： The invention relates to a biodegradable foil made from a low salt content hydroxypropylether solution of a starch containing at least 70% amylose having a median molecular weight from between about 105 to about 2×107, a polydispersity from about 2 to about 8, a degree of substitution from about 0.1 to about 0.5, and a substantially equal substituent distribution between C2/C3 and C6 bond sites in a glucose molecule and a density of about 1.3 g/cm3. The foil is of a thickness between about 20 &mgr;m and 200 &mgr;m and has a light transmissivity, at light of a wavelength of about 560 nm of in excess of 80%. The foil is especially suitable for printing, writing and deep drawing as well as for projection slides.

摘要翻译： 本发明涉及由含有至少70％直链淀粉的淀粉的低盐含量羟基丙醚溶液制成的生物可降解箔，其中间分子量为约105至约2×10 7，多分散度为约2至约8，取代度 约0.1至约0.5，以及葡萄糖分子中C2 / C3和C6键位点之间的基本相等的取代基分布，密度约为1.3 g / cm3。 箔的厚度在约20μm到200μm之间，并且具有大约560nm波长的光超过80％的透光率。 箔片特别适用于印刷，书写和深冲以及投影幻灯片。