Technical data of Jiangsu Junhua Special Plastics (www.chinaPEEK.com): PEEK products have outstanding dimensional stability

1. PEEK has excellent dimensional stability, which is very important for some applications. Changes in environmental conditions such as temperature and humidity have little effect on the size of PEEK parts, which can meet the use requirements of working conditions with relatively high dimensional accuracy. This characteristic is specifically reflected in the following four aspects: 2. PEEK injection molding shrinkage is small, which is very beneficial to control the dimensional tolerance range of PEEK injection molded parts, making the dimensional accuracy of PEEK parts much higher than that of general plastics; 3. The thermal expansion coefficient is small. With the change of temperature (which can be caused by the change of ambient temperature or friction heat during operation), the dimensional change of PEEK parts is very small; 4. Good dimensional stability. The dimensional stability of engineering plastics refers to the dimensional stability of engineering plastic products during use or storage. This dimensional change is mainly caused by the increase of the activation energy of the polymer molecules, which causes the chain segments to curl to a certain extent; 5. PEEK has outstanding resistance to thermal hydrolysis and has very low water absorption in high temperature and high humidity environments. It will not have obvious dimensional changes due to water absorption like general-purpose plastics such as nylon;