Textile pulp powder defoamer solution

Customer type

1. Customer information: Jiate textile pulp company specializes in textile pulp, because the original defoamer can not meet the requirements, so I found Nanhui and sent the sample to us, hoping that we can solve the problem of sample foaming.

2. Sample information: powder slurry

3. Customer requirements: strong compatibility, no oil bleaching, strong defoaming effect

Principle and analysis of defoaming

1. Analysis of the cause of blistering

During the processing of textiles, various dyes and auxiliaries have to be contacted. These auxiliaries, especially surfactants such as detergents, penetrants, emulsifiers and levelling agents, are prone to foam after being subjected to mechanical vibration.

Weaving sizing Generally, fabrics need sizing during weaving and finishing. According to different fiber varieties, the pulp mainly includes starch, carboxymethyl cellulose, methyl cellulose polyvinyl alcohol, polyvinyl acetate, acrylate and sodium alginate. These macromolecular substances are prone to foam in the slurry, which affects the penetration and makes the sizing uneven.

2. The hazards of blistering

To eliminate foam, measures such as static, heating or decompression can be used. However, in the printing and dyeing process to quickly eliminate foam or avoid foam generation, it is necessary to add a defoamer for textile printing and dyeing.

After the defoamer is added to the working fluid, it becomes a solution, emulsion or dispersion, which is adsorbed on the surface of the bubble film. Because it has a lower surface tension than the foam film, it can attract the surfactant or foaming material to reduce the surface viscosity of the foam liquid film, and locally become thin and rupture.

The defoamer for textile printing and dyeing developed by Nanhui has two properties: foam breaking and foam suppression. Some defoamers can only break foam temporarily and lose their effect when dissolved in liquid. Ideal defoamers require both foam suppression and foam suppression. The defoaming effect, the solubility in water is small, and it is not easy to be emulsified and solubilized by the working fluid.

3. Analysis of defoamer solution

The defoamer developed by Nanhui defoamer factory is used for dyeing, which is more meaningful. If there is foam in the dyeing solution, color spots, stains and uneven color will be formed on the fabric, which will seriously affect the quality of the product. Therefore, various Dyeing machines, including rope dyeing, jig dyeing, warp beam dyeing and socks dyeing, all use defoamers in the processing technology. In recent years, polyester and chemical fiber blended fabrics have been dyed, and a large number of high temperature and high pressure jet overflow dyeing has been used at high temperatures. And under mechanical vibration, it is easy to produce foam, which affects the quality of the finished product. For the dyeing of knitted fabrics, in order to save energy, water, dye materials and shorten the dyeing cycle, a large number of small bath ratios are used for rapid dyeing, and most of the dyeing equipment uses compact piece dyeing machines. Due to the low liquor ratio, the dye liquor concentration is high. The heating speed is fast, the foaming is increased, and the flow of the circulating pump is reduced. The fabric speed slows down, causing the fabric to become tangled and knotted, affecting levelling and causing color difference. In order to ensure quality, dyeing defoamer must be added.

Comparison of defoaming test