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Survey---- Overview Of TPU On The World Market
Nov 09, 2018

Overview of TPU on the market

Properties of commercially available TPU include:

  • high abrasion resistance

  • low-temperature performance

  • high shear strength

  • high elasticity

  • transparency

  • oil and grease resistance

The currently available TPUs can be divided mainly in two groups, based on soft segment chemistry:

  1. polyester-based TPUs (mainly derived from adipic acid esters)

  2. polyether-based TPUs (mainly based on tetrahydrofuran (THF) ethers). The differences between these two groups are outlined in the table below:

Table of properties

Table 1: Main differences between polyester- and polyether-based TPU.

(A = excellent; B = good; C = acceptable; D = poor; F = very poor)

PropertyPolyester-based TPUPolyether-based TPU
Abrasion resistanceAC
Mechanical propertiesAB
Low temperature flexibilityCA
Heat agingBD
Hydrolysis resistanceFA
Chemical resistanceAD
Microbial resistanceFB
Adhesion strengthBD

In other words, polyether-based TPU is used only in cases where excellent hydrolysis and microbial resistance is required, as well as in cases where extreme low temperature flexibility is important.

When stable light colour and non-yellowing performance are required, aliphatic TPU based on aliphatic isocyanates is used.

Recently, BASF has pioneered crosslinking during TPU production, made possible by adding liquid crosslinkers and using a masterbatch. Plant-based bio TPU has been developed for green thermoplastic elastomer applications by Merquinsa and GRECO, marketed as Pearlthane ECO and Isothane respectively.

From Wikipedia

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