| 摘要 |
The present invention relates to an extruder for a polymer, and a process for extruding a polymer using said extruder, said extruder comprising:
(i) two or more barrel sections (1a,1b,1c) arranged sequentially from:
(a) an upstream feed barrel section (1a) to which polymer feedstock to be extruded is fed, the upstream feed barrel section containing one or more screws each having a diameter of X; to
(b) a downstream barrel section (1c) from which melted polymer is passed to a die and extruded; and
(ii) one or more feed ports for feeding polymer feedstock to be extruded into the extruder at its upstream end,
characterised in that the total length of the one or more feed ports through which polymer feedstock is introduced is greater than 2*X. |
