A preparation method of thin undenatured skin collagen sheet material

Abstract

A method for preparing a thin undenatured leather collagen sheet material, characterized in that the thickness of the bare hide after depilation and liming is first adjusted with a peeling machine, then delimed according to the conventional deliming method for leather processing, and then used with a swelling agent Treat until the bare skin swells evenly to a translucent state; after the swelling is completed, soak it in a dehydrating agent for at least 30 minutes and then replace the dehydrating agent. During the dehydrating treatment, soak it in the dehydrating agent for 3-6 times; Squeeze with a water machine, and then smooth it with a smoother to obtain a thin skin collagen sheet material with a thickness of 0.3-0.5mm. In this method, the dehydrating agent is used to dehydrate the naked skin in the state of swelling, so that the collagen fiber bundles are dispersed and the porous structure is maintained, and the volatile characteristics of the dehydrating agent are used to prevent the thermal denaturation of the skin during the shaving process, and untanned undenatured thin skin collagen can be obtained Protein flake material. The product retains the natural structure of collagen in the leather block, and can be used not only in leather processing, but also in the fields of biomedicine and food.

Description

technical field [0001] The invention belongs to the technical fields of leather chemistry and engineering and film processing, and in particular relates to a preparation method of a thin leather collagen sheet material which maintains the triple helix structure of skin collagen and is not tanned by a tanning agent. Background technique [0002] In the process of tanning and flaky collagen processing, the thickness adjustment directly affects the range of product use, and also directly affects the economic benefits of the production enterprise. At present, the thickness adjustment in the processing of tanning and flaky collagen materials mainly includes two operations of slicing and shaving. The slicing is to use a sharp belt knife to cut the skin into the required thickness, and at the same time obtain multi-layer sheet materials. Shaving is to use a sharp spiral knife to cut the hide to obtain a layer of flake material with a specific thickness, and the excess part is disca...

AI Technical Summary

Problems solved by technology

The multi-layer sheet material obtained by peeling can be processed and sold in different degrees, and the debris generated by shaving is difficult to produce economic benefits. However, the precision of peeling processing is limited, and very thin skin collagen sheets cannot be obtained. Although the processing precision is high and the thickness of the product can be very low, the shaving process will generate high temperature. In order to prevent shaving and collagen denaturation, it is often necessary to tan the hide to make it have a higher Only when the shrinkage temperature is higher can the skin collagen sheet material with a thinner thickness be obtained. Although the hides treated by pickling or tanning can also be shaved, but the thickness of the product is thick, it is difficult to achieve the level achieved by shaved and tanned hides. Thinness