Dark shade dyeing method for microporous track etch membranes with large pores and low porosity

摘要

Methods for dyeing of microporous track etched membranes are provided. In particular, these methods are suitable for dark shade dyeing of membranes having large pores with low porosity. Desirably, such methods provide dyed membranes wherein the membrane parameters are not significantly changed as compared to those prior to dyeing. Likewise, the resultant dyed membranes exhibit no negative influence on sensitive cell culture system applications.

主权项

1. A method for dyeing a microporous membrane comprising:
contacting the microporous membrane with an aqueous dispersion dye system at a temperature between 90 to 100° C. for a time period sufficient to produce a desired transmission spectra for the microporous membrane wherein the aqueous dispersion dye system comprises a dyeing additive comprising a diffusion accelerator; and a dye selected from the group of azo and anthraquinone dyes, and heating the dyed microporous membrane by exposing it to a temperature between 110 and 150° C. for 20 to 90 minutes thereafter.