What are the soft properties of washing powder

When laundry is washed, it loses its pre-wash softness, giving it a hard feel. This tendency is more pronounced especially when washing wool fabrics in the washing machine. After washing, cotton and hemp fiber fabrics will also have obvious roughness. This phenomenon makes people's skin feel uncomfortable especially when the washed underwear, sheets, towels, etc. are worn, and the comfortable hand feel is also of great value to other fabrics such as linen tablecloths. In addition, due to the large-scale listing of chemical fiber clothes, people's clothes are also more colorful. Chemical fiber has many advantages such as durability, easy washing, moisture resistance and moth resistance. However, due to the dry surface of chemical fibers, there is often a lot of static electricity, so clothes wearing chemical fibers are easy to entangle and hug; skirts are easy to fit on the body; underwear and linings generate static electricity; wearing chemical fiber fabrics walk across the carpet or lean on the sofa People sometimes experience electric shocks when sliding and getting on and off clothes. In addition, wearing chemical fiber clothes is also easy to get dust and so on. In order to overcome the above shortcomings, softener and antistatic agent are added in the processing of washing powder to make soft and antistatic washing powder. The hardening of clothes after washing is generally considered to be the formation of a salt film on the fibers, which cannot be washed off even during the rinsing process and adheres to the fabric. The addition of fabric softener can prevent salt deposition on the fiber surface to form a salt film. In order to effectively prevent the function of salt film, the softener is required to have the following properties: ① easy to disperse in water; ② have appropriate affinity for the object to be washed, and residual adsorption after washing; ③ easy to disperse in the rinsing solution; ④ It can give the fiber soft and fluffy properties (handfeel). To this end, it is necessary to reduce the friction between fibers, increase the lubricating feeling, and not produce an oily feeling; ⑤ can make the fibers have an antistatic effect; ⑥ does not affect the color of the fabric. Even if the original color is not darkened, the effect of increasing the sense of lightness is shown as much as possible; ⑦ The treated fabric does not lose its easy wettability. Amphoteric surfactants, nonionic surfactants, and anionic surfactants also have softening effects. Its soft and antistatic properties are generally not as good as that of cations, so it is not as important as cations to use as a soft antistatic agent.