| 摘要 |
<p>A method is disclosed for the production of low-emission moulded pieces for continuous use at temperatures > 50 °C, made from a thermoplastic moulded mass containing A) 10 to 99.9 wt.% polybutylene terephthalate or mixtures thereof with polyethylene terephthalate and/or polypropylene terephthalate, B) 0.1 to 50 wt.% of at least one terpolymer, obtained from b1) at least one vinylaromatic monomer, b2) at least one C1 to C4 alkyl(meth)acrylate or (meth)acrylonitrile and b3) 0.1 to 10 wt.%, based on total weight of components b1) to b3), of at least one monomer, containing an alpha,ß-unsaturated anhydride and C) 0 to 60 wt.% of further adjuncts, the sum of the weight percentages of components (A) to (C) being 100 %, by injection moulding, characterised in that the injection moulding is carried out using a degassing plastifier unit with a housing having a feed opening for the thermoplastic moulding mass, a screw, transporting and plastifying the thermoplastic moulding mass along a screw path and one or more degassing openings for the escape of volatile components from the plastified thermoplastic moulding mass in the screw path to the outside from the degassing plastifier unit.</p> |
