Plastic compositions and containers made thereof
AssigneeSA Des Eaux Minerales D'Evian Saeme
InventorAnne-Flore Jacob
Life of this patent
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Abstract
A composition includes: a) polystyrene, the polystyrene including polybutadiene; b) vegetal fibers having a length lower than 50 μm; and c) at least one compatibility agent including a polybutadiene maleic anhydride copolymer, the copolymer including at least 17% by weight of the copolymer of maleic anhydride. The composition is used for manufacturing a plastic composition. The plastic composition obtained by heating the composition, a sheet obtained by extruding the plastic composition, and a container obtained by thermoforming the sheet are also described.
Claims13
Composition comprising:
- a) polystyrene, said polystyrene comprising polybutadiene;
- b) vegetal fibers having a length lower than 50 μm;
- and
- c) at least one compatibility agent comprising a polybutadiene maleic anhydride copolymer, said copolymer comprising at least 17% by weight of the copolymer of maleic anhydride.
Process of manufacturing a product of a desired shape, preferably a yogurt container, comprising:
- i) mixing and heating the following ingredients, so as to obtain a plastic composition:
- a) polystyrene, said polystyrene comprising polybutadiene;
- b) vegetal fibers having a length lower than 50 μm;
- and
- c) at least one compatibility agent comprising a polybutadiene maleic anhydride copolymer, said copolymer comprising at least 17% by weight of the copolymer of maleic anhydride,
- ii) extruding the plastic composition obtained in step i), so as to obtain a sheet or a film,
- iii) thermoforming the sheet or film obtained in step
Dependencies are inferred from the claim text.