Material Drying
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Insufficient welding/bonding strength of styrene-acrylonitrile copolymer products
Problem Phenomenon
After products are joined by hot plate welding, ultrasonic welding, etc., the welding strength is insufficient, and they break at the weld under stress.
Cause Analysis
(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
Solution
(1) Optimize welding temperature to the suitable range for styrene-acrylonitrile copolymer
(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
Key Takeaway
Welding strength is determined by melt fusion quality.
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