In short, TPEs are a family of rubber like materials that combine the characteristics of rubber with the recyclability and processing advantages of plastics. TPEs includes TPE, TPR, TPV, TPU etc.
In China, TPE refers to compounds based on SEBS(Styrene-Ethylene-Butadiene-Styrene), TPR refers to compound based on SBS(styrene-butadiene-styrene). In fact, the words SBS or SEBS are often used to describe these compounds when they are in fact raw materials. By describing compounds as SBS or SEBS it enables us to know the general level of performance and properties of the compound.
SBS is based on two-phase block copolymers with hard and soft segments. The styrene end blocks provide thethermoplastic properties and the Butadiene mid-blocks provide the elastomeric properties. SBS is probably the highest volume material produced and is commonly used in footwear, adhesives and lower specification seals and grips, where resistance to chemicals and aging are not critical.
SBS, when hydrogenated, becomes SEBS, as the elimination of the C=C bonds in the butadiene component generated ethylene and butylenes mid-block, hence the SEBS acronym. SEBS is characterised by improved heat resistance, weather resistance, mechanical properties and chemical resistance.
Hongshuo compounds based on SEBS exhibit excellent weathering, UV and ozone resistance making them ideal choice for outdoor and long service life applications.
Post time: Nov-18-2021