JINHONG POLYMER

Buyer-side technical library

Technical insights for better PVC compound decisions.

Practical guides for identifying molding and cable defects, collecting the right evidence, and planning a controlled sample trial.

Latest guidance

5 technical guides

Cable insulation · Checklist

What should a buyer provide for 450/750 V insulation?

Turn a broad voltage inquiry into a traceable sample brief: construction, test method, conditions and acceptance criteria.

Read technical checklist →
Selection & sampling

How to select PVC sheathing compound for an LV cable jacket

Match the cable structure and extrusion line before a trial—not hardness alone.

Read selection guide →
Injection troubleshooting

PVC USB plug injection flow marks: diagnosis and corrective path

Distinguish flow bands, splay, unmelted particles, weld lines, jetting, cold slugs and burns before changing compound.

Read root-cause guide →

Clear PVC molding deformation: how to separate shrinkage, warpage and a material question

Collect the part, mold and test evidence before changing a clear PVC compound.

Technical Insights →

Flexible PVC conduit rough surface: diagnose the line before changing the compound

Separate drag marks, orange peel, particles and bubbles, then run a controlled extrusion comparison.

Technical Insights →