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Method for degreasing sturgeon leather

The technology of sturgeon skin and sturgeon, which is applied in the field of leather processing, can solve the problems of uneven dyeing, stiff leather, and it is difficult to remove fat, and achieves the effect of easy market promotion and full and bright color.

Active Publication Date: 2019-04-05
YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Sturgeon is a rare ancient fish left over from the Mesozoic Era 150 million years ago. Its body surface is covered with bone plates arranged in five rows in a longitudinal direction, with unique three-dimensional patterns. It is a high-quality material for making high-grade leather. There is a lot of fatty tissue in the middle of the joint part of fish skin. During the tanning process of sturgeon leather, it is difficult to remove the fat from it by ordinary degreasing technology, which seriously affects the quality of sturgeon leather and limits the development and application of sturgeon leather.
[0003] Judging from the published academic papers or patents, the degreasing method used, after our repeated demonstrations, cannot remove the oil in the sturgeon leather well, mainly in the joints between the sturgeon’s back bone plate and the leather, Sturgeon abdominal bone plate and leather joints, pectoral fins, pelvic fins, dorsal fins and other parts of the oil can not be completely degreased. If the degreasing is not clean, the leather will become stiff during the later tanning process. The filling material will not be filled in, and the dyeing will be uneven. Unevenness, obvious differences in leather parts, inconsistent thickness, seriously affect the quality of sturgeon leather

Method used

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  • Method for degreasing sturgeon leather
  • Method for degreasing sturgeon leather
  • Method for degreasing sturgeon leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for degreasing sturgeon leather, comprising the steps, and the following percentages all refer to mass percentages:

[0046] According to conventional cognition in this field, the weight of sturgeon skin involved in the present invention refers to the wet weight of sturgeon skin; the percentage addition of raw materials used in each step is based on the weight of sturgeon skin involved in each step . The sturgeon skin used in this example is Chinese sturgeon (A. sinensis).

[0047] 1) Pre-skimming

[0048] In the immersion section, the sturgeon skin is pre-degreased, mainly to remove surface oil and prepare for the liming section

[0049] (1) The water temperature is 18-22 degrees, and the water in the drum is fully washed with a large amount of water to wash the sturgeon skin twice, each time for 15 minutes, 2 revolutions per minute, and weigh after washing;

[0050] (2) take by weighing 200% water of the sturgeon skin weight that step (1) obtains, 1% soaki...

Embodiment 2

[0080] Testing of various indicators of sturgeon leather:

[0081] The degreased sturgeon leather obtained in Example 1 is sent to the SGS institution for detection, and the detection is based on the Candidate List of Substances of Very High Concern (according to EU No. REACH Regulation No. 1907 / 2006), screening and testing 168 substances of very high concern (SVHC), and testing the lead content at the same time, the testing content and results are as follows:

[0082]

[0083]

[0084]

[0085]

[0086]

[0087]

[0088] According to the specific test scope and analysis technique, the concentrations of substances of very high concern tested in the entrusted samples are all less than 0.1%

[0089] The lead test results are as follows:

[0090] Remark:

[0091] (1) 1 mg / kg = 0.0001%

[0092] (2) MDL = method detection limit

[0093] (3) ND = not detected (

[0094] (4) "-" = not specified

[0095] Lead (Pb)

[0096] Test method: refer to US EPA m...

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Abstract

The invention belongs to the field of leather processing, and particularly discloses a method for degreasing sturgeon leather. The method has the advantages that different degreasing agents and degreasing methods are selected for different grease components in different tanning processes according to the fat distribution characteristics of sturgeon skin to achieve degreasing, and the degreased sturgeon skin is clean and neat, can meet dyeing requirements of the sturgeon leather in different colors and has saturated colors and high brightness; the leather subjected to tanning and degreasing isproven to be free of lead after tests, 168 kinds of substances of very high concern (SVHC) are screened and tested, the substance concentration is less than 0.1%, and large-scale market promotion is facilitated.

Description

technical field [0001] The invention belongs to the field of leather processing, and in particular relates to a method for degreasing sturgeon leather. Background technique [0002] Sturgeon is a rare ancient fish left over from the Mesozoic Era 150 million years ago. Its body surface is covered with bone plates arranged in five rows in a longitudinal direction, with unique three-dimensional patterns. It is a high-quality material for making high-grade leather. There is rich fatty tissue in the middle of the junction of fish skin. During the tanning process of sturgeon leather, it is difficult to remove the fat from it by common degreasing technology, which seriously affects the quality of sturgeon leather and limits the development and application of sturgeon leather. [0003] Judging from the published academic papers or patents, the degreasing method used, after our repeated demonstrations, cannot remove the oil in the sturgeon leather well, mainly in the joints between t...

Claims

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Application Information

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IPC IPC(8): C14C1/08C14B17/00C14C3/04C14C3/08
CPCC14B17/00C14C1/08C14C3/04C14C3/08
Inventor 危起伟杜浩刘志刚马岩
Owner YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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