Abstract:

To improve adhesion resistance, ink absorption property and reduce pH value produced in the polyamide wet coating of trademark fabrics, the influence of inorganic fillers on properties of wet coating of trademark fabrics were investigated by characterizing the stability and rheology properties of coating slurry after addition of different inorganic fillers into the coating slurry, the surface morphology and tensile properties of the resultant coating film and the style, ink absorption, whiteness, pH and washable color fastness of coated fabrics.The results show the coating slurry containing calcium carbonate and kaolin has higher stability, wherein the elongation at break of the coating film containing calcium carbonate is 30.22% with better flexibility, but the pH of the resultant coated fabric was 8.25. The coating slurry with hydrotalcite had relative poor dispersion and stability, and the pH value is 8.55. The coating slurry containing wollastonite presented excellent fluidity. The resultant coating film is uniform and smooth and has better ink absorption property with a large number of micropores. Moreover, the coated fabrics presented high whiteness and qualified environment friendliness performance. The grade of washable color fastness is 4-5, and the pH value is 7.32.

Key words: polyamide, wet coating, filler, trademark fabric, rheologic property, mechanical property, ink absorption