Method for the preparation of an article
AssigneeLouis Rinze Henricus Adrianus WILLEMSEN
InventorEgidius Petrus Gerardus CLARIJS
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Abstract
Described is a method for the preparation of an article, in particular a biodegradable article, from a thermoplastic composition comprising starch by thermoforming, comprising the steps of providing a sheet of the thermoplastic composition in rubber phase at a temperature of at least 100° C., stretching the sheet into or onto a mould, cooling the sheet to form the article, remove the article from the mould, wherein the mould in step b has a temperature of 5° C. or less, the sheet in step c is cooled to a temperature of 40° C. or less, steps b and c being performed in 10 s or less. Further, a thermoformed article, obtainable by the said method and the use of such an article is described.
Claims21
1-60. (canceled)
A method for the preparation of an article from a thermoplastic composition comprising starch by thermoforming, comprising the steps of:
- a) providing a sheet of the thermoplastic composition in rubber phase at a temperature of at least 100° C.,
- b) stretching the sheet of step a) into or onto a mould,
- c) cooling the sheet while stretched in or on the mould to form the article,
- d) remove the article formed in step c) from the mould, wherein the mould in step b) has a temperature of 15° C. or less, the sheet in step c) is cooled to a temperature of 40° C. or less, steps b) and c) being performed in 10 s or less.
Dependencies are inferred from the claim text.