Shenzhen Gobay Electronics Co.,Limited
Address:13A21,14F, Baoyuan,Huafeng Headquarters Economic Bldg, No.288，Xixiang Rd, Bao'an. ShenZhen, China
Contact Name:Ms.Hedy Xie
Properties of commercially available TPU include:
high abrasion resistance
high shear strength
oil and grease resistance
The currently available TPUs can be divided mainly in two groups, based on soft segment chemistry:
polyester-based TPUs (mainly derived from adipic acid esters)
polyether-based TPUs (mainly based on tetrahydrofuran (THF) ethers). The differences between these two groups are outlined in the table below:
Table 1: Main differences between polyester- and polyether-based TPU.
(A = excellent; B = good; C = acceptable; D = poor; F = very poor)
|Property||Polyester-based TPU||Polyether-based TPU|
|Low temperature flexibility||C||A|
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.