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Glossless surface of general-purpose polyethylene extruded products

Glossless surface is caused by low die temperature or too fast cooling, and the die temperature needs to be increased and the cooling slowed down.

Material Analysis glossless die temperature cooling rate die polishing melt temperature

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Improper production environment control during processing of general-purpose polyethylene general-purpose polyethylene

The production environment is an important factor affecting the processing quality, and a sound environmental control system needs to be established.

Material Drying environmental control workshop temperature humidity cooling water temperature process stability

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Excessive regrind ratio of general-purpose polyethylene causing performance decline

The performance decline of regrind is the result of heat history accumulation, and the regrind ratio and number of uses need to be strictly controlled.

Material Analysis regrind molecular weight decrease antioxidant regrind ratio heat history

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Rough inner wall of general-purpose polyethylene extruded products

Rough inner wall is caused by low mandrel temperature or poor surface condition, and needs to be solved from temperature control and mold maintenance.

Processing Machinery rough inner wall mandrel temperature mandrel polishing melt temperature plasticization quality

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Degradation discoloration of general-purpose polyethylene extruded products

Degradation discoloration is caused by overheating or excessive shear, and needs to be prevented from three aspects: temperature control, speed, and material selection.

Processing Machinery degradation discoloration thermal degradation screw speed residence time antioxidant

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Impurities mixed into general-purpose polyethylene raw material causing product defects

Impurity mixing is solved by strengthening raw material management and equipment cleaning, and sound anti-impurity measures need to be established.

Processing Machinery impurities magnetic frame filtration equipment cleaning raw material management

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Orange peel appears on the surface of general-purpose polyethylene blow molded products

Orange peel is caused by poor parison surface quality or poor mold replication, and needs to be improved from parison quality and blow '2079851475616104453.

Blow Molding orange peel parison surface mold polishing blowing air pressure mold temperature

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Defects caused by insufficient drying before processing of general-purpose polyethylene general-purpose polyethylene

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

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Cyclic pressure fatigue failure of general-purpose polyethylene PPR pipes

Fatigue failure is caused by internal defects and stress concentration, and needs to be improved from three aspects: pipe inner wall quality, welding quality, and material toughness.

Extrusion & Post fatigue failure PPR stress concentration inner wall quality welding bead

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Bubbles/gas pores on the surface of general-purpose polyethylene 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

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Tüm Konular 11636 Material Drying 1439 Injection Molding 1506 Molding Process 740 Molds & Tooling 1506 Processing Machinery 2025 Extrusion & Post 2239 Blow Molding 315 Thermoforming 141 Material Analysis 1343 Production & Quality 382

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