By K.E. Kear

Thermoplastic elastomers (TPEs) have the elastic behaviour of rubber and the processability of thermoplastics. The chemistry, homes and processing of those fabrics are mentioned during this overview. professional grades are being brought for particular functions and with exact houses, akin to softness or processability. The assessment is observed by way of round four hundred abstracts from the Rapra Polymer Library database.

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The material suppliers commonly have characterised the physical constants necessary for the mould filling analysis using the commercial software available. Most of the TPEs can be run fully automated in hot runner tooling which allows moulding without a runner that must be degated (140). For cold runner designs a three plate tooling design will allow for automatic 24 degating of the parts if appropriately designed gates are used. Typically even soft TPEs will automatically degate with a tapering tunnel gate.

There are not many applications requiring extremely high volume engineered TPE components, unlike the market for bottle blowing for packaging. 4 Thermoforming The thermoforming process is used for moulding TPEs. Sheet material can be drawn with vacuum or pressure to fill a thermoform cavity with many of the TPEs. There are not a lot of commercial applications to cite that have been able to take advantage of this lower cost tooling process. TPE sheet stock is easily obtained commercially and can be formed into the final shape for small volume production needs where a shell shaped TPE component is needed.

300-1 German AS YOU LIKE IT - VISUAL EFFECTS OF THERMOPLASTIC VULCANISED RUBBER Maurel C; Laurent D Advanced Elastomer Systems NV/SA The first impression is the most important and is often the decisive factor about the success or failure of a product. Thermoplastic vulcanised rubber products of a type of Santoprene are offering product designers many opportunities to optimise haptic and visual properties for every sort of application. This article looks at how Santoprene, which is a fully vulcanised material on a polyolefin base, is now opening up a broad spectrum of possibilities.

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