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How to Solve Blow Molding Problems - LyondellBasell

continuous extruders. n Check for screw wear. If severe, replace the screw. Cold Spots show up as non-homogeneous areas in the wall of the blown object. This can also be caused by insufficient back pressure or non-uniformity in the melt. Solutions are the same as for bubbles. Cold Spots also can result from a resin mixture in

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