| 摘要 |
<p>PCT No. PCT/FR94/00647 Sec. 371 Date Dec. 1, 1995 Sec. 102(e) Date Dec. 1, 1995 PCT Filed Jun. 2, 1994 PCT Pub. No. WO94/29382 PCT Pub. Date Dec. 22, 1994Process for the manufacture of a biodegradable hydrophobic and transparent film, comprising the following steps: (a) producing a mixture including an alginate of algal origin the algae being chosen from the group consisting of, chlorophyceae, rhodophyceae, or phaeophyceae, or a synthetic equivalents thereof an aqueous solvent and a plasticizer which is miscible with the alqinate and the solvent; (b) forming a film from this mixture; (c) drying the film thus obtained; (d) treating at least one face of the dry film with a solution of tanning material selected from the group consisting of an alum, a tannin or a chrome tanning solution and then with a solution of a compound capable of ensuring the gelling of the alginate, said compound being chosen from the group consisting of calcium carbonate, calcium or zinc chloride, calcium or zinc sulfate.</p> |
