| 摘要 |
The method for preparing polyester pellets from base polymer, which is produced from polymerization of dimethyl terephthalate, terephthalic acid, butanediol and ethyleneglycol, comprises (1) mixing molten polymer in a static mixer and feeding it directly into a twin extruder, and (2) making pellets by compounding with filler and reinforcing agent, which are separately fed according to required properties of pellets. In the process silica and carbon fiber as hard fillter and glass fiber are fed into the inlet (a), and calcium carbonate as extender, soft filler and plastics are fed into the inlet (b). The method can improve the productivity by reducing facilities and energy costs and process steps.
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