Processing Machinery
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PVC Wire and Cable Compound Surface Particles
Problem Phenomenon
Cable insulation layer surface rough particles, affecting appearance and electrical performance.
Cause Analysis
Poor plasticization, poor filler dispersion or impurities passing through broken screen; more likely when formula has large filling amount; particles are the external manifestation of dispersion and filtration problems; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based solely on experience.
Solution
①Increase plasticization temperature and dispersion effect; ②Replace screen pack and monitor pressure differential; ③Control filler fineness and moisture content; ④Clean die head flow channels and dead corners; ⑤Optimize formula dispersibility, ensure uniform dispersion of fillers and additives.
Key Takeaway
PVC cable compound particles = 'dispersion + filtration': filler dispersion and screen integrity are the two key passes; cable compound has high surface smoothness requirements, dispersion and filtration must both be in place.
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