Material Drying
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Insufficient welding/bonding strength of polystyrene products
Problembeschreibung
After products are joined by hot plate welding, ultrasonic welding, etc., the welding strength is insufficient, and they break at the weld under stress.
Ursachenanalyse
(1) Welding temperature is on the low side; the material is not fully melted and fused
(2) Welding pressure is insufficient or time is too short
(3) The welding surface is contaminated (oil stains, dust, etc.)
(4) Material moisture or additives affect welding
(5) The welding surface is uneven, and the contact area is insufficient
Lösung
(1) Optimize welding temperature to the suitable range for polystyrene
(2) Increase welding pressure and time
(3) Clean the welding surface before welding
(4) Fully dry the raw material and reduce additive dosage
(5) Ensure the welding surface is flat
Wichtigste Erkenntnis
Welding strength is determined by melt fusion quality.
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