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Hoechst Celanse 公司开发了一种能代替玻璃纤维的聚酯纤维,商品名为 Trevira。这种纤维的比重低于玻纤,还能改进层压板的抗冲性。在这期 SPI 会议上宣读的数据表明,聚酯纤维也会改善树脂传递模塑(RTM)体系。聚酯纤维的强度不如玻纤,故当掺入的 Trevira比例较大时,将导致材料的延伸强度下降。该公司已对几种 RTM 层板的结构作了研究,选用的四种样品板分别为:E-玻璃连续纤维加Trevira 增强的聚酯树脂(已充填碳酸钙)板、仅以 Trevira 增强的不充填碳酸钙的聚酯树脂板、全玻纤体系、两块碳纤维增强的乙烯酯树脂板(分别含 Trevira 或 E-玻纤芯线)。正如所预料的一样,比重最低的板是全聚酯纤维体系,为1.18g/cm~3,比全玻纤板轻33%,但抗拉强度只有3900psi,仅为后者的31%。选用 Trevira 的最主要的优点是其改善了材料的冲击强度。抗冲试验证实了纤维有能
Hoechst Celanse has developed a polyester fiber that replaces glass fibers under the trade name Trevira. The specific gravity of this fiber is lower than the glass fiber, but also improves the impact resistance of the laminate. The data presented at this SPI conference show that polyester fiber also improves resin transfer molding (RTM) systems. Polyester fiber strength is not as good as glass fiber, so when Trevira incorporation ratio is larger, will result in the decrease of the strength of the material. The company has studied the structure of several RTM laminates, with four sample panels selected: E-glass continuous fibers plus Trevira reinforced polyester resin (filled calcium carbonate) panels, reinforced only with Trevira Calcium carbonate-filled polyester resin panels, all-glass systems, two carbon fiber reinforced vinyl ester resin panels (Trevira or E-glass core, respectively). As expected, the lowest specific weight of all-polyester systems was 1.18 g / cm ~ 3, 33% lighter than full-glass, but the tensile strength was only 3900 psi, only 31% of the latter. The main advantage of using Trevira is that it improves the impact strength of the material. Impact test confirmed the fiber has energy