How to Reduce Weld Lines and Uneven Pearlescent Appearance in Injection Molding
Abstract. Pearlescent pigments can make weld lines, flow-related bands, and local bright-dark differences more visible in injection-molded plastics because their plate-like particles are sensitive to melt flow and orientation. Effective troubleshooting therefore requires control of both physical weld-line formation and the optical orientation of the pigment flakes. This guide explains the main cau...
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