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Praktische Antworten auf häufige Herausforderungen mit Kunststoffmaterialien

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Q

Cross-linked polyethylene XLPE unstable crosslinking efficiency (Variant: strengthened measures)

A

Unstable crosslinking efficiency is caused by uneven coagent dispersion or process condition fluctuation, and needs to be solved from mixing and process stability. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery crosslinking efficiencyuniform crosslinking degreecoagent dispersioncrosslinking temperaturebatch difference

Q

Bubbles in cross-linked polyethylene XLPE cable insulation layer (Variant: strengthened measures)

A

Bubbles in the cable insulation layer are caused by moisture and volatile gases, 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 insulation layer bubblemoisture contentventingplasticizationcooling rate

Q

Cross-linked polyethylene pipe pressure resistance test failure (Variant: strengthened measures)

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. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery pressure resistance testpipe wall thicknessmaterial degradationcrystallinityplasticizing quality

Q

Excessive shrinkage of cross-linked polyethylene extruded products (Variant: strengthened measures)

A

Excessive shrinkage is caused by high crystallinity or high temperature, and needs to be solved by controlling temperature and cooling rate. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post shrinkage ratecrystallinitymelt temperaturecooling ratehaul-off speed

Q

Cross-linked polyethylene XLPE product surface roughness (Variant: strengthened measures)

A

Surface roughness is mainly caused by pre-crosslinked gel and uneven dispersion, and temperature needs to be strictly controlled and uniform coagent dispersion ensured. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery surface roughnesspre-crosslinkinggelperoxide dispersiondie temperature

Q

Cross-linked polyethylene pipe longitudinal reversion rate exceeding standard (Variant: strengthened measures)

A

Excessive reversion rate is caused by large internal stress or excessive orientation, and needs to be solved from temperature control, cooling rate and haul-off speed. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post longitudinal reversion rateinternal stresscooling ratehaul-off speedmolecular orientation

Q

Cross-linked polyethylene extruder screw design mismatch (Variant: strengthened measures)

A

Screw design needs to match material characteristics and product requirements, and a dedicated screw should be customized when necessary. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery screw designcompression ratiolength-to-diameter ratiomixing elementscrew matching

Q

Cross-linked polyethylene XLPE insufficient crosslinking degree (Variant: strengthened measures)

A

The main cause of insufficient crosslinking degree is insufficient crosslinking agent dosage or improper crosslinking conditions, and strict control is needed from both formulation and process. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post crosslinking degreeperoxidegel contentirradiation dosecrosslinking time

Q

Glossless surface of cross-linked polyethylene extruded products (Variant: strengthened measures)

A

Surface glosslessness is caused by low die temperature or too fast cooling, and the die temperature needs to be increased and cooling slowed down. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery glosslessnessdie temperaturecooling ratedie polishingmelt temperature

Q

Pre-crosslinking in cross-linked polyethylene XLPE extrusion process (Variant: strengthened measures)

A

Pre-crosslinking is the most common process problem in XLPE processing; the key is to strictly control the temperature not to exceed the peroxide decomposition temperature. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post pre-crosslinkingperoxideextrusion temperaturematerial stagnationscrew design

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