**How to Identify TPE Materials: 9 Key Physical and Chemical Characteristics**

Time of issue:2025-03-13

TPE is a high-strength, high-elasticity thermoplastic material with injection molding capability. It features wide application scope, environmental safety, excellent colorability, soft tactile feel, weather resistance, fatigue resistance, and temperature resistance. TPE offers superior processing performance without requiring vulcanization, enabling cost-effective recycling. It can be used for overmolding with PP, PE, PC, PS, ABS, or as standalone components.


 

Due to its multi-component nature, non-experts can use these simple methods to distinguish TPE materials:


 

Stickiness
SBS-based TPR tends to feel stickier than SEBS-based TPE, as SBS has lower oil absorption capacity. Low-molecular-weight SEBS or off-grade materials may also cause stickiness.
Odor
SBS-based TPR typically has stronger odor compared to odorless SEBS-based TPE.
Luster
  • SBS-based TPR usually exhibits higher gloss
  • SEBS-based TPE has matte finish with smoother texture (even when formulated for gloss)
  • Imported SEBS grades provide finer matte surfaces compared to domestically produced materials.
Combustion
  • SBS-based TPR produces dense black smoke during combustion
  • SEBS-based TPE burns with minimal smoke due to hydrogenation treatment, resulting in cleaner flame and reduced odor.
Processing Temperature
  • SBS-based TPR processes at ~160°C
  • SEBS-based TPE requires ~180°C (varies with molecular weight: higher MW grades need higher temperatures).

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