555:55%Glassreinforcedmodifiedpolyethyleneterephthalatewithsuperiorstiffness,dimensionalstability,heatresistanceandoutstandingresistancetocreep.(55％玻璃纤维增强改性优越刚度，尺寸稳定性，耐热性和杰出的抗蠕变聚对苯二甲酸乙二醇酯))