Simple Methods for Non-Professionals to Identify TPE Materials
Time of issue:2024-12-28
Translated Text:
Since TPE is composed of multiple substrates and polymers, its physical properties are diverse. Here are simple methods for non-professional engineers to identify TPE materials:
- Tackiness:
Due to the weaker oil absorption capacity of SBS compared to SEBS, TPR made from SBS substrates is generally more prone to feeling tacky than TPE made from SEBS substrates. Of course, some low-molecular-weight SEBS or its inferior grades can also cause tackiness.
- Odor:
Generally, TPR made from SBS substrates has a stronger odor than TPE made from SEBS substrates. Good quality TPE can usually be made odorless.
- Gloss:
TPR made from SBS substrates is generally more glossy than TPE made from SEBS substrates. However, SEBS can also be glossy, and TPR made from SBS substrates can also be made matte. But even when both are matte, TPE made from SEBS substrates feels smoother to the touch, while TPR made from SBS substrates feels somewhat rough. Additionally, the molecular weight distribution of domestically produced SEBS substrates is wider. For TPE made from the same molecular weight grade of substrates, imported ones tend to be more matte and smooth.
- Burning:
When burned, TPR made from SBS substrates generally produces more smoke than TPE made from SEBS substrates. This is because SEBS is hydrogenated SBS with a high hydrogen content, which results in less smoke and a weaker odor when burned.
- Processing Temperature:
TPR made from SBS substrates can usually be thermoplastically processed at around 160°C, while TPE made from SEBS substrates requires a processing temperature of around 180°C. Of course, this also depends on their molecular weight. Higher molecular weight materials require higher processing temperatures.
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