欧美最新精品videossexohd I 91久久久久久久久久久久久 I 国产91嫩草 I 亚洲成人77777 I 免费看一级 I 无码国产精品久久一区免费 I 亚洲精品中文字幕久久久久 I 亚洲精品无码久久毛片 I 国产第91页 I 欧美成人观看 I 三级久久久 I 欧美自拍区 I 99色 I 在线免费黄色片 I 国产黄毛片 I 午夜爱爱影院 I 久久久99无码一区 I 久久字幕网 I 久久精品8 I 热99re久久精品国产首页免费 I 青娱乐手机在线视频 I 久久五 I 丰满人妻被黑人连续中出 I 欧美成人va免费大片视频 I 国产精品无码a∨果冻传媒 I 午夜影院在线看 I 亚洲欧美日韩另类精品一区 I 一级黄色的毛片 I 久操视频在线观看免费 I 无码无遮挡又大又爽又黄的视频

By introducing the third monomer of sodium sulfonate group (-SO3Na) in the polymerization of recycled PET, 

the recycled semi-extinction, bright, normal temperature and atmospheric pressure cationic chip can be obtained to ensure that the respun polyester yarn can chemically react with cationic dyes.

The spun recycled polyester yarn can chemically react with cationic dyes, so that the dye is easy to fix on the recycled polyester yarn, 

and the use of its textile has the advantages of easy color absorption, high color rate, bright color and can be mixed with ordinary polyester, 

and finally dyed into hemp gray two-color, multi-color silk.