Problem & Solution

Q

Bubbles/pores on the surface of cross-linked polyethylene extruded products (Variant: mass production scenario)

A

Bubbles are caused by water vaporization or gas entrainment, and need to be solved from raw '2079851475616104451 and the venting system. Targeted preventive measures need to be taken in different production scenarios.

Material Drying bubbleporeraw '2079851475616104451ventingvolatiles

Q

Defects caused by insufficient drying before cross-linked polyethylene cross-linked polyethylene processing (Variant: strengthened measures)

A

Insufficient drying is a common root cause of processing defects, and a complete drying system and moisture content detection system needs to be established. Targeted preventive measures need to be taken in different production scenarios.

Material Drying raw '2079851475616104451moisture contentsilver streakbubbledehumidifying drying

Q

Bubbles/pores on the surface of cross-linked polyethylene extruded products (Variant: strengthened measures)

A

Bubbles are caused by water vaporization or gas entrainment, and need to be solved from raw '2079851475616104451 and the venting system. Targeted preventive measures need to be taken in different production scenarios.

Material Drying bubbleporeraw '2079851475616104451ventingvolatiles

Q

Uneven wall thickness of cross-linked polyethylene extruded pipes (Variant: mass production scenario)

A

Uneven wall thickness is caused by uneven die gap or uneven temperature, and needs to be solved from mold accuracy and temperature uniformity. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post uneven wall thicknessdie concentricitytemperature uniformityhaul-off stabilitysizing sleeve

Q

Melt flow rate mismatch of raw material for cross-linked polyethylene extrusion (Variant: strengthened measures)

A

MFR mismatch needs to be solved by selecting suitable grades and adjusting temperature parameters. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post melt flow rategrade selectionextrusion gradeprocess adjustmentbatch detection

Q

Improper processing temperature window selection of cross-linked polyethylene cross-linked polyethylene (Variant: strengthened measures)

A

Temperature window selection is the basis of processing and needs to be set reasonably according to material characteristics and actual operating experience. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery processing temperaturetemperature windowplasticizing qualitymaterial degradationtemperature calibration

Q

Sharkskin appears on the surface of cross-linked polyethylene extruded products (Variant: mass production scenario)

A

Sharkskin is the result of stick-slip flow of the melt at the die exit, and is improved by increasing the die temperature and reducing the extrusion speed. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post sharkskinmelt fracturedie temperatureextrusion speeddie polishing

Q

Sharkskin appears on the surface of cross-linked polyethylene extruded products (Variant: strengthened measures)

A

Sharkskin is the result of stick-slip flow of the melt at the die exit, and is improved by increasing the die temperature and reducing the extrusion speed. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post sharkskinmelt fracturedie temperatureextrusion speeddie polishing

Q

Random copolymer polypropylene pipe special material pipe pressure resistance test failure

A

Pressure resistance failure is caused by insufficient wall thickness, material degradation or internal defects, and needs to be systematically solved from process and material quality.

Processing Machinery pressure resistance testpipe wall thicknessmaterial degradationcrystallinityplasticizing quality

Q

Excessive shrinkage rate of random copolymer polypropylene pipe special material extruded products

A

Excessive shrinkage rate is caused by high crystallinity or high temperature, and needs to be solved by controlling the temperature and cooling rate.

Extrusion & Post shrinkage rate crystallinity melt temperature cooling rate haul-off speed

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