The following information applies when the product is processed by injection molding. If other processing methods, such as extrusion, are used, then the parameters can differ considerably from the figures given here.

You will find more information in our brochure
Processing data for the injection molder or in the TechAssistant.

Drying

Bayblend® is supplied in nonmoistureproof packaging. Therefore, the granules can absorb moisture during transport and storage (approx. 0.2 % in standard atmospheric conditions). When processing Bayblend®, therefore, care should be taken to ensure that the granules are processed in dry conditions. For injection molding the residual moisture in the granules should be less than 0.02 %. An excessive amount of moisture in the plastic melt can lead to surface defects in the form of streaks as well as hydrolytic degradation (reduction of the mechanical properties).

Processing

The optimum processing temperature of Bayblend® must be determined according to grade and molding and should be between 240 and 280 °C. It is recommended that the effective melt temperature be checked using an insertion thermometer on the ejected press cake. Overheating, or leaving the melt in the cylinder for an extended period of time, can result in material damage, i.e. a reduction in strength and/or surface defects in the form of streaks on the injection molded part. Thermal decomposition of the material starts at approx. 300 °C.
Mold heating should be uniform and should be in the recommended range of 70 to 100 °C. Grade-dependent recommendations should be followed.