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Longitudinal reversion rate of random copolymer polypropylene pipe special material pipes exceeding the standard

Reversion rate exceeding the standard is caused by large internal stress or excessive orientation, and needs to be solved from temperature control, cooling rate, and haul-off speed.

Extrusion & Post longitudinal reversion rate internal stress cooling rate haul-off speed molecular orientation

Screw design mismatch of random copolymer polypropylene pipe special material extruder

The screw design needs to match the material characteristics and product requirements, and a special screw needs to be customized if necessary.

Processing Machinery screw design compression ratio L/D ratio mixing elements screw matching

Bubbles/gas pores on the surface of random copolymer polypropylene pipe special material extruded products

Bubbles are caused by water vaporization or gas entrainment, and need to be solved from raw '2079851475616104451 and venting system.

Material Drying bubble gas pore raw '2079851475616104451 venting volatiles

Defects caused by insufficient drying before processing of random copolymer polypropylene pipe special material random copolymer polypropylene pipe special material

Insufficient drying is a common root cause of processing defects, and a sound drying system and moisture content inspection system need to be established.

Material Drying raw '2079851475616104451 moisture content silver streak bubble dehumidifying drying

Melt flow rate mismatch of raw materials for random copolymer polypropylene pipe special material extrusion

MFR mismatch needs to be solved by selecting suitable grades and adjusting temperature parameters.

Extrusion & Post melt flow rate grade selection extrusion grade process adjustment batch inspection

Improper selection of the processing temperature window for random copolymer polypropylene pipe special material random copolymer polypropylene pipe special material

The selection of the temperature window is the basis of processing, and needs to be reasonably set according to the material characteristics and actual operating experience.

Processing Machinery processing temperature temperature window plasticization quality material degradation temperature calibration

Sharkskin appears on the surface of random copolymer polypropylene pipe special material extruded products

Sharkskin is the result of stick-slip flow of the melt at the die exit, and is improved by raising the die temperature and reducing the extrusion speed.

Extrusion & Post sharkskin melt fracture die temperature extrusion speed die polishing

Uneven cutting end face of random copolymer polypropylene pipe special material pipes (Variant: strengthened measures)

Uneven cutting end face is caused by tool wear or improper cutting parameters, and the tools need to be maintained and the cutting process optimized. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery cutting end face cutting tool cutting speed pipe cooling cutting machine calibration

Cooling system efficiency decline of random copolymer polypropylene pipe special material extruder (Variant: mass production scenario)

The decline in cooling efficiency is caused by insufficient water volume or high water temperature, and the cooling system needs to be improved and the water temperature controlled. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery cooling efficiency cooling water flow cooling water temperature water channel scaling cooling water tank

Sizing device failure of random copolymer polypropylene pipe special material extruder (Variant: mass production scenario)

Sizing device failure needs to be solved from three aspects: vacuum system, cooling system, and mold accuracy. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery sizing device vacuum degree sizing sleeve wear cooling water mold concentricity

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