Method for comminuting polymeric shaped articles by milling
AssigneePurac Biochem B.V.
InventorAlbert Van Der Wal
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Abstract
The invention pertains to a method for comminuting a polymeric shaped article to particles having an average particle size smaller than 6 mm by using a grinding apparatus, characterized in that the shaped article prior to grinding is subjected to a milling step in a milling apparatus to substantially fully convert the shaped article into chips, after which the chips are fed into the grinding apparatus for further comminuting giving at least 25 wt. % less particles having a size less than 1 mm than obtained by the grinding step only.
Claims11
A method for comminuting a polymeric shaped article to particles having an average particle size smaller than 6 mm by using a grinding apparatus, the method comprising:
- prior to grinding, subjecting the shaped article to a milling step in a milling apparatus to substantially fully convert the shaped article into chips having dimensions L×W×T being 1 to 16 cm ×0.1 to 10 mm ×0.5 to 10 mm, wherein L stands for the length, W stands for width, and T stands for the thickness of the chip,
- after the milling step, feeding the chips into the grinding apparatus for further comminuting giving at least 40 wt. % less particles having a size less than 1 mm than would have been obtained by the grinding step only.
Dependencies are inferred from the claim text.