Material Analysis
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LGFPP recycled material performance degradation
Fenómeno del problema
After adding 30% recycled material, product performance declines by more than 40%
Análisis de la causa
The glass fiber length in the recycled material is only below 30% of the original length; multiple thermal histories break the chemical bonds at the PP-glass fiber interface; the PP matrix itself degrades and the molecular weight decreases
Solución
Strictly control the recycled material addition ratio ≤20-30%; fully premix recycled material with virgin material; use recycled material preferentially for non-critical structural parts
Conclusión clave
Multiple thermal histories of LGFPP cause irreversible performance degradation
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