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How to Select TPU for PVC Modification
Aug 31 , 2026
Successful PVC-TPU polymer-blend modification relies not only on material intrinsic compatibility (intermolecular hydrogen‑bonding between TPU urethane groups and PVC polar C‑Cl groups), but also on proper TPU grade selection and strict processing‑temperature control. PVC is a thermally‑sensitive polymer; its narrow safe‑processing window creates unique practical challenges for compounders. The gu...
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TPU Thick‑Wall Molding: Distinguishing Shrinkage Sink Marks from Short‑Shot Defects
Sep 07 , 2026
Thick-wall TPU injection-molded parts (wall thickness ≥10 mm) often suffer from surface dents or depressions. It is easy to confuse shrinkage‑induced sink marks with short‑shot (incomplete filling) defects. Although they look similar to the naked eye, their root causes, diagnostic logic, and corrective measures are completely different. Misdiagnosis leads to wasted time and incorrect machine adjus...