Extrusion Asia Edition 1-2020

➠ ProTec Polymer Processing GmbH www.sp-protec.com with 64 strands and twice the output fol- lowed in 2019. Over the last year, the company also ordered two SOMOS Gra- mix S9 gravimetric dosing and mixing systems which will be brought into ser- vice on the lines this year. "Pultrusion", derived from "pull" and "extrusion", can be used to produce a wide range of fiber reinforced plastics. ProTec's pultrusion lines allow plastics manufacturers to automate the high-ef- ficiency production of LFT pellets. The fiber-polymer combination can include virtually any common thermoplastic with reinforcement being provided as requir- ed by glass, steel, aramid or carbon fibers. The new high-speed retrofit requires on- ly slight modifications and additions to be made to existing pultrusion lines. Mo- difications include the addition of a pre- heater and optimization of die geometry. As a result, the fibers can be adjusted to temperature more quickly, so ensuring faultless impregnation at a distinctly higher production rate. A second water bath also increases cooling capacity. Pro- Tec has likewise modified the pelletizer. In the high-speed variant, specially ar- ranged rotary knives chop the pellets at high speed to the optimum processing length of 6 to 12 mm. 实际上，任何常见的热塑性塑料均可用于生产LFT粒子，并根据增强作用的需要选用玻 璃纤维、钢纤维、芳族聚酰胺纤维或碳纤维来提供增强作用（照片：ProTec Polymer Processing） Virtually any common thermoplastic can be used to produce LFT pellets with reinforcement being provided as required by glass, steel, aramid or carbon fibers (Photo: ProTec Polymer Processing) 22 信息縱覽 Extrusion Asia Edition 1/2020