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The longer the fiber, the more effectively the polymer "seizes" and transmits the stress to the fiber. Therefore, the long-fiber-blended shaped product has higher homogeneity and more straightness than the short-fiber-blended molded product, and the long-fiber has a significantly stronger effect than the short-fiber
link:http://www.lfrt-plastic.com/long-glass-fiber-polypropylene/50-long-glass-fiber-pp.html
50%Long Glass Fiber Reinforced PP lgf50