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Problem & Solution

Practical answers to common plastic material challenges

2239 questions
Q
Melt flow rate mismatch of raw material for random copolymer polypropylene extrusion
A
MFR mismatch needs to be solved by selecting suitable grades and adjusting temperature parameters.
Extrusion & Post melt flow rategrade selectionextrusion gradeprocess adjustmentbatch testing
Q
Sharkskin appearing on the surface of random copolymer polypropylene extruded products
Q
Dimensions of random copolymer polypropylene injection molded products too small, below the lower limit
A
Undersized dimensions are caused by excessive shrinkage and need to be controlled by strengthening holding pressure, lowering temperature and extending cooling time.
Extrusion & Post undersized dimensionsexcessive shrinkageinsufficient holding pressurepost-shrinkagegate freezing
Q
Dimensions of random copolymer polypropylene injection molded products too large, exceeding the upper limit
Q
Flash/burrs appearing in random copolymer polypropylene injection molded products
Q
Dimensions of random copolymer polypropylene injection molded products too small, below the lower limit (variant: strengthened measures)
Q
Dimensions of random copolymer polypropylene injection molded products too large, exceeding the upper limit (variant: strengthened measures)
Q
Flash/burrs appearing in random copolymer polypropylene injection molded products (variant: strengthened measures)
Q
Film blocking/poor anti-blocking of homopolymer polypropylene film
Q
Poor transparency of homopolymer polypropylene blown film
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