Flexible, elastic and biodegradable film made of polymer based on lactic acid, capable of being suitable especially for the production of medical dressings
AssigneeSolvay (Societe Anonyme)
InventorDominique Grandjean
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Abstract
The film is obtained directly by extrusion from the lactic acid-based polymer plasticised beforehand by incorporation of 5 to 30% by weight of the polymer of a glycerol ester obtained from an acid containing 4 carbon atoms in its molecule. The film has an elongation at break of more than 300% and is particularly suitable for the production of medical dressings.
Claims7
A flexible, elastic and biodegradable film, wherein said film has less bubbles, less self-sticking and improved thermal stability, produced by extrusion of a copolymer of DL-lactic acid and glycolic acid, containing from 25 to 75 by weight of units derived from lactic acid, and said copolymer plasticised beforehand by incorporation of 5 to 30% by weight of the copolymer of a glycerol ester obtained from an acid containing 4 carbon atoms in its molecule.
Dependencies are inferred from the claim text.