Application Insight / PVC · 8 min read
PVC impact problems: diagnosis and additives
Why PVC profiles and pipes fail on impact and how impact modifiers fit the diagnosis with stabilization and process.
Low impact is rarely “just resin”
Drop-test breaks, field cracking and pipe/profile scrap usually mix formulation and process: missing or under-dosed impact modifier, weak thermal stabilization, unbalanced lubrication and aggressive thermal history.
Diagnosis order
Start from the symptom and part type (profile vs pipe). Confirm the formula has a modifier suited to rigid matrix, that extrusion sits in the fusion window and that thermal degradation is not masking mechanical results.
- ▸Separate process failure from formulation failure.
- ▸Review impact-modifier dosage.
- ▸Check thermal stabilizer and color after aging.
- ▸Trial specimens with and without lubrication tuning.
Plectus path
Plectus Impact Modifier for PVC is the cluster hub; thermal stabilizer and PE wax join when the diagnosis points to color, blooming or flow. Profile and pipe landings detail the application; this article closes the technical rationale.