Light bleaching method of composite non-woven fabric

Abstract

The invention discloses a light bleaching method of a composite non-woven fabric. The light bleaching method of the composite non-woven fabric comprises the steps of boiling and bleaching, specifically, boiling and bleaching liquid is added into a bleaching pot, the composite non-woven fabric is soaked in the boiling and bleaching liquid to be boiled and bleached, the boiling and bleaching liquidcomprises softened water, liquid caustic soda and hydrogen peroxide, the concentration of the hydrogen peroxide is 12.5%-25%, the boiling and bleaching temperature is 75 DEG C-85 DEG C, and the boiling and bleaching time is 10 s-60 s. Due to the fact that the concentration and the treatment time of the hydrogen peroxide are reduced, the bleaching effect on the composite non-woven fabric is achieved, damage to fibers of the composite non-woven fabric is reduced, the soft hand feeling of fibers is reserved, meanwhile, the skin-friendly hydrophilicity of the whole composite non-woven fabric is improved, and multiple purposes are achieved at a time; the boiling and bleaching temperature is lower, the damage to non-woven fabric fibers is reduced, and the invalid decomposition of the hydrogen peroxide can be weakened; and compared with a conventional bleaching method, the light bleaching method of the composite non-woven fabric has the advantages that the treatment time is shorter, the boiling and bleaching temperature is lower, the efficiency is improved, and meanwhile, the energy consumption can be reduced.

Description

technical field [0001] The invention relates to the technical field of nonwovens, in particular to a light bleaching method for composite nonwovens. Background technique [0002] After the composite non-woven fabric, due to the high-pressure hydroentanglement, the high-pressure hydroentanglement flow will take away some impurities in the cotton material, and the water cycle is reused. The circulating water contains cotton seeds and fiber seed scraps carried by the cotton fiber itself. and other impurities. [0003] If the composite non-woven fabric has not undergone any treatment, the surface of the prepared composite non-woven fabric will be dirty, have defects, and the distribution of defects will be uneven, and a lot of manpower and material resources will be spent on the subsequent inspection of the fabric to pick out the defects. Moreover, the performance stability is not good, which will lead to uneven distribution of hydrophilicity and water repellency. [0004] Bas...

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Problems solved by technology

[0003] If the composite non-woven fabric has not undergone any treatment, the surface of the composite non-woven fabric prepared will be dirty, have defects, and the distribution of defects will be uneven, and a lot of manpower and material resources will be spent on the subsequent inspection of the fabric to pick out the defects.

Moreover, the performance stability is not good, which will lead to uneven distribution of hydrophilic and water repellent

[0004] Based on the existing problems of the composite non-woven fabric without any treatment, a method of bleaching the composite non-woven fabric is proposed, which can effectively alleviate the problems of the composite non-woven fabric without any treatment, but In actual operation, although the proposed bleaching process can solve the problems of dirty surface and uneven distribution of defects on the composite non-woven fabric without any treatment, it will also have negative effects

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