Material Analysis
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Poor Dispersion in In-situ Reinforced Blending of LCP with General-Purpose Resins
Problem Phenomenon
【Problem Phenomenon】When LCP is blend-extruded with PET/PA etc., dispersion is uneven, the reinforcement effect does not meet expectations, and unmelted particles appear in the product
Cause Analysis
LCP needs to form an in-situ fibrillated reinforcing phase in a specific temperature and shear field; when the blending temperature does not match or dispersive shear is insufficient, LCP becomes island-like particles instead of microfibrils; the Buffalo review records the technical key points of LCP blending in-situ reinforcement
Solution
Set the blending temperature in the overlapping melting point range of the two resins; increase the strength of screw shear mixing elements to promote LCP fibrillation; control the LCP content in the effective fibrillation range
Key Takeaway
LCP blending reinforcement relies on the temperature window and shear fibrillation; content and process must be linked; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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