A. Hannemann et al., Low-pressure mixing technology in PUR processing - The relationship between mixing quality and process parameters, KUNSTST-P E, 90(5), 2000, pp. 90
The quality with which PUR components can be mixed together in a high-frequ
ency mixer depends on various process parameters, such as throughput, rotar
y frequency and mixing position. An objective assessment of the mixing qual
ity can be obtained by colouring the components and subsequently analysing
the grey scale value.