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Degradation during processing caused by poor thermal stability of random copolymer polypropylene raw material

Thermal degradation is caused by high temperature, long residence time or excessive shear and needs to be solved from temperature control, rotation speed and regrind management.

Processing Machinery thermal degradationbarrel temperatureresidence timescrew speedantioxidant

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Large creep deformation of random copolymer polypropylene injection molded products

Creep deformation is an inherent characteristic of crystalline materials under long-term load and needs to be controlled by increasing crystallinity, reducing stress and selecting suitable materials.

Injection Molding creep deformationcrystallinityservice temperaturemolecular weightstress level

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Insufficient elongation at break of random copolymer polypropylene injection molded products

Insufficient elongation at break reflects poor material toughness; plastic deformation ability needs to be improved by optimizing temperature parameters and reducing defects.

Injection Molding elongation at breakmolecular orientationcrystallization qualityresidual stressmaterial toughness

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Barrel temperature control failure of random copolymer polypropylene injection machine

Temperature control failure is caused by sensor or heater failures; thermocouples, heating bands and temperature control instruments need to be systematically checked.

Injection Molding temperature control failurethermocoupleheating bandtemperature control instrumentPID parameters

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Sharkskin appearing on the surface of random copolymer polypropylene extruded products

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

Extrusion & Post sharkskinmelt fracturedie temperatureextrusion speeddie polishing

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Low hardness of random copolymer polypropylene injection molded products

Low hardness is mainly caused by insufficient crystallinity or material degradation and needs to be improved by increasing mold temperature and holding pressure.

Injection Molding low hardnesscrystallinitymold temperatureholding pressurenucleating agent

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Nozzle drooling in random copolymer polypropylene '2079851475616104452

Drooling is caused by high nozzle temperature and residual pressure and is solved by lowering temperature, adjusting back pressure and increasing suck-back.

Injection Molding droolingnozzle temperatureback pressuresuck-backneedle valve nozzle

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Gate freezing too fast in random copolymer polypropylene injection mold

Gate freezing too fast is caused by small gate size or low temperature; freezing time needs to be extended by enlarging the gate and increasing temperature.

Injection Molding gate freezinggate sizemold temperaturemelt temperatureholding pressure

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Unstable mold temperature control in random copolymer polypropylene '2079851475616104452

Unstable mold temperature is caused by improper cooling system design or maintenance and needs to be solved from the mold temperature controller, water channel design and maintenance.

Injection Molding unstable mold temperaturemold temperature controllercooling water channelscaletemperature uniformity

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Severe screw wear of random copolymer polypropylene injection machine

Screw wear is caused by materials, fillers and operating parameters; wear-resistant materials need to be selected and operating parameters reasonably controlled.

Injection Molding screw wearwear-resistant materialscrew speedfiller wearscrew clearance

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Kategoriler

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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