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Linear low-density polyethylene pipe failing pressure test (variant: strengthened measures)

Pressure test failure is caused by insufficient wall thickness, material degradation or internal defects and needs to be systematically solved from process and material quality. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery pressure testpipe wall thicknessmaterial degradationcrystallinityplasticization quality

Linear low-density polyethylene film blocking/poor opening (variant: strengthened measures)

Film blocking is caused by surface tension and temperature and needs to be solved by adding antiblocking agents and controlling winding conditions. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post film blockingantiblocking agentwinding temperaturewinding tensionslip agent

Poor plasticization caused by screw wear of linear low-density polyethylene extruder (variant: strengthened measures)

Screw wear reduces plasticization efficiency and needs to be solved by selecting wear-resistant materials and regular maintenance. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery screw wearpoor plasticizationwear-resistant materialscrew clearancescrew speed

Large barrel temperature fluctuation during linear low-density polyethylene linear low-density polyethylene processing (variant: strengthened measures)

Barrel temperature fluctuation is caused by heating or temperature control system failures; heating bands, thermocouples and temperature control instruments need regular inspection and maintenance. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery temperature fluctuationheating bandthermocoupletemperature control instrumentPID parameters

Linear low-density polyethylene linear low-density polyethylene process handover problems when switching between different processing methods (variant: strengthened measures)

Changeover handover requires advance planning and full preparation; the key is to clarify the differentiated requirements of different processing methods on materials. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post changeoverprocessing methodprocess parametersmaterial gradetrial production verification

Insufficient strength of linear low-density polyethylene film (variant: strengthened measures)

Insufficient film strength is caused by improper material selection or process parameters and needs to be optimized from raw material, temperature and blow-up ratio. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery film strengthMFRblow-up ratiodraw ratiomaterial degradation

Poor transparency of linear low-density polyethylene blown film (variant: strengthened measures)

Poor transparency is caused by high crystallinity or impurities and needs to be improved by increasing temperature, accelerating cooling and selecting suitable materials. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post poor transparencycrystallinitycooling ratenucleating agenthaze

Head pressure fluctuation of linear low-density polyethylene extruder (variant: strengthened measures)

Head pressure fluctuation is caused by unstable output or filtration system problems; extrusion parameters need to be stabilized and the filtration system maintained. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post pressure fluctuationscreenhead temperaturebreaker plateuniform output

Rough inner and outer walls of linear low-density polyethylene pipes (variant: strengthened measures)

Rough pipe walls are caused by low mold temperature or poor surface condition and need to be solved from temperature control and mold maintenance. In different production scenarios, targeted preventive measures need to be taken.

Material Drying rough pipe walldie temperaturemandrel temperaturemold polishingsizing sleeve

Haul-off speed mismatch of linear low-density polyethylene extruded products (variant: strengthened measures)

Haul-off speed mismatch needs to be solved by precisely adjusting haul-off parameters and ensuring haul-off stability. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post haul-off speedspeed matchinghaul-off slippingclamping forcehaul-off control

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