Material Drying
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Insufficient Welding/Fusion Strength of general purpose polystyrene Products
Problem Phenomenon
After the products are joined by hot plate welding, ultrasonic welding, etc., the welding strength is insufficient, and they break from the weld when stressed.
Cause Analysis
（1）The welding temperature is low, and the material is not fully melted and fused
（2）The welding pressure is insufficient or the time is too short
（3）The welding surface is contaminated (oil, dust, etc.)
（4）The material contains moisture or additives affect the welding
（5）The welding surface is uneven, and the contact area is insufficient
Solution
（1）Optimize the welding temperature to the suitable range of general purpose polystyrene
（2）Increase the welding pressure and time
（3）Clean the welding surface before welding
（4）Fully dry the raw material and reduce the additive dosage
（5）Ensure the welding surface is flat
Key Takeaway
The welding strength is determined by the melt fusion quality.
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