Environmental Sizing Is The Development Needs Of &Nbsp; Promoting Dyeing And Finishing Processing Energy Conservation And Emission Reduction.

The upper and lower reaches should jointly promote the sizing without PVA.

Now, when studying the textile sizing process, the engineers of textile sizing have changed the concept that they only looked at the requirements of dyeing and finishing without the requirement of dyeing and finishing. The environmental protection and energy saving of dyeing and finishing have been selected as one of the important factors for sizing and formulation.

Sizing can meet the requirements of weaving.

The quality of sizing is the key factor to ensure the weaving quality. The purpose of sizing is to evenly adhere the pulp to the inside and outside the yarn, making the yarn wear-resistant, smooth and flexible, so as to adapt to the tension change and strength requirement of high-speed weaving.

It is easy to degrade pulp with little environmental pollution.

The main size must meet the environmental requirements, and the environmental protection of other auxiliary slurry must be considered to ensure the environmental requirements of the whole slurry formula.

The main sizing agent of BOD5/CODcr or more should be selected, and the biological treatment of wastewater is better. For example, high performance modified starch, degradable polyacrylic acid slurry, etc., the main size without phosphorus or low phosphorus content is 0.3.

The grey cloth without PVA sizing provides the necessary guarantee for improving the dyeing and finishing quality.

At present, people's requirements for quality, color, handle and functionality of the products are getting higher and higher. To achieve these requirements, the quality of pretreatment before dyeing and finishing is the key link. Then the problem of PVA desizing is also highlighted. If PVA's grey cloth is not pure, it will appear dyed shade and depth difference.

Sizing without PVA is also a prerequisite for using biochemical dyeing and finishing technology.

Biochemical dyeing and finishing process can not only effectively reduce processing procedures, shorten processing time, reduce energy consumption and water consumption, but also greatly reduce processing costs.

The application of biotechnology can bring hope to the printing and dyeing industry to achieve cleaner production.

But the premise of application is that it can not contain PVA.

Therefore, sizing without PVA has become an urgent problem to improve the quality of dyeing and finishing and the application of biotechnology.

Some experts have suggested that the environmental pollution problem caused by PVA slurry can be taken by the textile industry at present. The countermeasures are to develop commercial PVA degrading enzymes and their desizing processes, or to carry out the oxidative desizing process instead of the existing alkali desizing process.

The measures that do not need PVA are: developing degradable environment-friendly slurry, such as high performance deep modified starch, developing natural polymer slurry, high performance and easily degradable polyacrylic acid slurry, low viscosity modified PVA, optimizing slurry formula, studying less component and multi-functional environmental protection formula, using advanced spinning process, improving yarn quality, applying advanced sizing process technology, reducing sizing capacity; application of PVA recycling and recycling technology, at present, can not completely abandon PVA sizing, reduce PVA's environmental pollution, and recycling PVA is an effective measure.

The implementation of PVA free sizing, especially the development and application of key technologies for textile sizing, needs the encouragement and support of national policies.

The cotton textile industry and printing and dyeing industry will also work together to achieve the green pulp each rice cloth and reduce the COD value of each ton of desizing waste liquid.