a级毛片免费观看视频_中文免费观看视频网站_有色视频在线观看免费高清在线直播_成人黄软件网18免费下载成人黄18免费视频

It mainly includes three categories 1. Textile additives: spinning oil agents, antistatic agents, textile wax agents, polishing agents, mercerizing agents, bleaching agents, etc 2. Printing and dyeing aids: emulsifiers, scouring aids, penetrating agents, wetting agents, leveling agents, dispersants, detergents, reducing agents, fixin...

I, Review of the Development Process of Printing and Dyeing Assistants The world additive industry began in the 1930s, initially almost entirely used in the textile industry, and later entered the daily chemical industry, such as detergents, but still dominated by textile additives. In the 1950s, it expanded to industries such as petrochemi......

Waterproofing agents can be divided into two categories based on their carbon chain structure, one is fluorinated waterproofing agents, and the other is fluorine-free waterproofing agents. Currently, the most commonly used fluorinated waterproofing agents are carbon eight waterproofing agents and carbon six waterproofing agents. Carbon eigh...

Preparation of common buffer solutions: PH value Preparation method 0 1mol/lHCl 1 0.1mol/lHCl 2 0.01mol/lHCl 3.6 NaAc.3H20 8g, dissolve in an appropriate amount of water, add 6 mol/l HAc 134ml, and dilute to 500ml 4.0 NaAc.3H20 20g, dissolve ......

1. Jingliu Phenomenon: In the warp direction of the fabric, the entire warp yarn appears to shine or darken regularly or irregularly, with one or more shadow stripes. Cause: Shading caused by differences in color absorption during fabric dyeing due to factors such as warp material or tension. Solution: Maintain consistency in tension ......