Composite biological degreasing agent and application thereof

Abstract

The invention provides a composite biological degreasing agent and application thereof, and relates to the technical field of leather degreasing. The composite biological degreasing agent comprises the following components in parts by weight: 15-35 parts of acidic lipase and 10 to 25 parts of a surfactant. The composite biological degreasing agent disclosed by the invention is mainly prepared fromthe acidic lipase; the grease degrading effect of the acid lipase under the acid condition and the emulsifying effect of the surfactant can be utilized; when pickled hide and wet blue leather are subjected to supplementary degreasing treatment, the synergistic effect of degreasing by a biological method and a chemical method is achieved, and the purpose of efficient degreasing under an acidic condition is achieved, so that crusts such as the pickled hide or the wet blue leather meet the requirements of subsequent tanning processing.

Description

technical field [0001] The invention relates to the technical field of leather degreasing, in particular to a composite biological degreasing agent and its application. Background technique [0002] Leather is denatured and non-perishable animal skin obtained through physical and chemical processing such as depilation and tanning. Degreasing is an essential process in tanning or fur processing. Only by removing the natural oil contained in animal skins to a certain extent can the collagen fibers in the leather be loosened, creating favorable conditions for the smooth progress of subsequent tanning and other processes. . However, for oil-rich animal skins such as sheep skin and pig skin, which have a large oil content, the previous degreasing treatment usually cannot completely degrease, resulting in a large amount of unremoved skin embryos in the state of sour skin and wet blue skin. Grease, if supplementary degreasing is not carried out, it will lead to poor quality of ta...

AI Technical Summary

Problems solved by technology

However, for oil-rich animal skins such as sheep skin and pig skin, which have a large oil content, the previous degreasing treatment usually cannot completely degrease, resulting in a large amount of unremoved skin embryos in the state of sour skin and wet blue skin. Grease, if not supplemented with degreasing, it will lead to poor tanning quality, such as oily frost on the leather surface, uneven dyeing, etc., so it is necessary to supplement degreasing acid leather and wet blue leather under acidic conditions

[0003] The applicant has found that the prior art has at least the following technical problems: the current method of skin germ treatment in the state of sour leather and wet blue leather is to use a large amount of surfactants for degreasing, but the use of a large amount of surfactants in the tanning process will pollute the environment cause greater impact

However, the lipase preparations currently used in tanning are mainly used for degreasing under neutral and alkaline conditions, and are not suitable for acid leather and wet blue leather.

Although acid lipase can meet the supplementary degreasing treatment of acid hide and wet blue hide under acidic conditions, the degreasing rate of acid lipase alone is not high

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