Delamination,bleeding,agglomeration,color colorful coating grain of lacklustre problem resolution2016.02.05 10:40
1.the supernatant of colorful coating problem
Should be based on enamel (dispersed phase) and protect the proportion of glue solution (dispersion medium) and controlled the difference between them. The proportion of bad one A size appropriate range, too big or too small will bring influence to the stability of the coating. According to experience, enamel proportion control-in d =1.010-1.020 to protect the glue weight control between the d=1.003-1.006.
2.bleeding and dispersion medium opacity colorful coating problem
Is generally controlled can't change the concentration of the solvent. No solvent concentration is low, the color slants small, coated very soft, storage stability, at this time will be Produce coating bleeding and dispersion medium turbid phenomenon; But no solvent concentration is not high, then will produce the color peeling, coating film is uneven Obviously, feel rough phenomenon, so there's no solvent should be adjusted to a suitable concentration to improve the color coated good condition, overcome the bleeding and turbid phenomenon.
3.dispersion medium curdle to form a smooth dough
Primarily the acid value of control coating, for matching used in reactive dye coating, general control in 6-12 koh/G advisable, other should be in accordance with the standard Strictly control the acid value.
4.color grain of RMB dim luster
Should from the following several aspects to adjust: 1.The exchange cellulose thickener; 2.Reducing the amount of defoaming agent or change the types of defoaming agent; 3.In paint variety, pay attention to ph adjustment.