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Yaygın plastik malzeme zorluklarına pratik yanıtlar

Makalelere Göz At →
11636 soru
Q
Burnt due to mold venting in PVA '2079851475616104452
A
Burning is caused by insufficient venting and high-speed injection compressing air; increasing venting and reducing speed are key
Injection Molding PVA injection mold burning vent groove injection speed air compression
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Q
Die drool and carbon deposits at PVA extrusion die
A
Die carbon deposits are caused by thermal oxidation and untimely cleaning; PE flushing and timely cleaning are key
Extrusion & Post PVA extrusion die carbon deposit PE flushing residence zone thermal oxidation
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Q
Delamination of PVA blended with incompatible resin
A
Blends with large polarity difference need reactive compatibilizer to form chemical bonding at the interface to solve
Extrusion & Post PVA blend delamination polarity difference PVA-g-MAH reactive compatibilization interfacial bonding
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Q
Connected pellets in PVA extrusion pelletizing
A
Connected pellets are caused by elastic recovery and low-temperature pelletizing; high-temperature water cutting and fast cutting are key
Extrusion & Post PVA pelletizing connected pellets pelletizing water temperature cutter speed elastic recovery
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Q
Severe parison sag in PVA extrusion '2079851475616104457
A
Parison sag is caused by low melt strength; slight crosslinking and wall thickness control are key
Blow Molding PVA '2079851475616104457 parison sag melt strength slight crosslinking wall thickness control
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Q
Yellowing of PVA products after processing
A
Yellowing is caused by thermo-photo-oxidation and metal catalysis; improving the antioxidant system and UV absorber are key
Production & Quality PVA yellowing thermo-oxidation antioxidant UV absorber metal catalysis
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Q
Dimensional change of PVA products during long-term storage
A
Dimensional change is caused by physical aging; annealing treatment and slight crosslinking are measures to stabilize dimensions
Material Analysis PVA dimensional stability physical aging annealing secondary crystallization slight crosslinking
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Q
Poor interfacial bonding between PVA and filler
A
The elastomer-filler interface requires the dual action of coupling agent and compatibilizer, otherwise the filler plays a negative effect
Material Analysis PVA filler interfacial bonding coupling agent compatibilizer filler dispersion
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Q
Melt fracture in PVA extrusion
A
Q
Bubbles in thick-walled PVA '2079851475616104452
A
Thick-wall bubbles are caused by a combination of insufficient holding pressure, moisture and poor venting
Material Drying PVA injection bubbles holding pressure thick-walled products mold venting
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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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