4. Distinguish between amorphous and semi-crystalline thermoplastics
4.1 Amorphous thermoplastics
Amorphous thermoplastics are easier to weld than semi-crystalline ones, because their behavior is predictable. In fact, each degree of softening corresponds to a further degree of softening.
This makes it easier to solder amorphous from semi-crystalline.
The sealing range is wider (10 to 20°C amorphous, 1 to 3°C semi-crystalline).
The material gradually softens.
In the event of overheating, smell followed by smoke and color give the alarm.
Heating power is lower.
Cooling is rapid.
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Distinguish between amorphous and semi-crystalline thermoplastics
Successful technical welding
Bibliography
Célia NICODEAU's thesis "Modelling the continuous welding of thermoplastic matrix composites" - 2005
Thesis by François LEMARCHAND "Study of the occurrence of residual stresses in the welding stacking process and continuous consolidation of thermoplastic composites" - 2008
Jean-Florent LAMETRE's thesis "Study of the adhesion of semi-crystalline...
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