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