C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 3/14 (2006.01) C08J 5/18 (2006.01) C08L 3/02 (2006.01) C08L 3/04 (2006.01) C08L 3/08 (2006.01) C08L 3/18 (2006.01)
Patent
CA 2266984
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 10 5 to about 2 x 10 7, a polydispersity from about 2 to about 8, a degree of substitution from about .1 to about .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 µm and 200 µm 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.
Albrecht Rotraut
Boettcher Silvio
Haerter Gernod
Pawlak Peter
Schwartze Erich Heinrich
Gesellschaft Fur Spezialfolien-Entwicklung
Smart & Biggar
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