法国人妻亂伦中文字,jenna presley,高清freesexvideo 性老少配,yy6080私人影院午夜无码

Menu
solution
Home - News - solution
Ways to improve the uniform dyeing effect of nylon.
Time:2020-03-30
View:2522

The dyeing effect of nylon fiber is affected by many factors.Dyeing conditions such as auxiliaries , predetermined processes and pH value etc. All affect the success or failure of dyeing.Nylon leveling agent makes dyeing less sensitive to pH value,has affinity to dyes and has goog leveling effect.