Patent ID: 9592627
Date: 2017-03-14
CPC Classifications: B29C,B29K,B29L,Y10T

Claim:
1. A method for forming a polymer to define a nano-scale sized surface texture onto at least part of the surface of said polymer so formed, the method comprising: continuously depositing a polymer extrudate that is above its glass transition temperature from an extruder head onto a serially advancing lower moulding surface of a first mould; wherein a plurality of heat sinks are provided for at least one of the upper and lower moulding surfaces, said heat sinks being spaced relative to each other along the pressure forming zone, wherein a heat sink more advanced through the pressure forming zone is controlled to a lower temperature than an adjacent heat sink less advanced through the pressure forming zone in order to progressively reduce the temperature of the polymer as it advances through the pressure forming zone; removing the polymer from the moulding surfaces, after said actively controlled heat removal.