Cow vamp leather pretreatment method based on season change and application thereof

A shoe upper leather and pretreatment technology, which is applied in the field of tanning, can solve the problems of blocking the collagen fiber channel of the leather, and achieve the effects of reducing stress, reducing usage, and improving physical and mechanical properties

Pending Publication Date: 2022-03-22
XINGYE LEATHER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a method for pretreatment of bovine shoe upper leather based on seasonal changes and its application, which solves the problem of excessive natural oil and collagen interstitial content between collagen fibers in the prior art due to seasonal changes. The technic

Method used

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  • Cow vamp leather pretreatment method based on season change and application thereof

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Embodiment 1

[0030] A kind of cow shoe upper leather pretreatment method based on seasonal change, comprises the steps:

[0031] (1) Preparation of moisture rehydrating agent: mix 50 parts of maleic anhydride, 40 parts of stearic acid, 55 parts of trimethylolpropane, 12 parts of polyethylene glycol, 8 parts of xylene, and 1 part of lithium hydroxide, Under the protection of nitrogen, raise the temperature to 150°C, stir for 1h, then raise the temperature to 190°C, stir for 1h, then distill off xylene under reduced pressure, cool down to 60°C, add 20 parts of ethylene glycol monobutyl ether, then cool down to 20°C, add 120 parts of distilled water, stirred for 0.5h, to obtain a moisture rehydrating agent;

[0032] (2) Preparation of composite moisture rehydrating agent: at 30°C, take 100 parts of water, add 30 parts of oxalic acid, 10 parts of sodium edetate, and 10 parts of boric acid, mix well and lower the temperature to 18°C, add 17 parts of egg white Filler (PC, Sichuan Desaier), 10 p...

Embodiment 2

[0038] A kind of cow shoe upper leather pretreatment method based on seasonal change, comprises the steps:

[0039] (1) Preparation of moisture rehydrating agent: 65 parts of maleic anhydride, 20 parts of stearic acid, 30 parts of palmitic acid, 62 parts of trimethylolpropane, 13 parts of polyethylene glycol, 9 parts of xylene, 2 parts of hydrogen Mix lithium oxide evenly, raise the temperature to 155°C under the protection of nitrogen, stir for 1h, then raise the temperature to 185°C, stir for 1h, then distill off xylene under reduced pressure, cool down to 75°C, add 20 parts of ethylene glycol monobutyl ether, and then Cool down to 20°C, add 145 parts of distilled water, and stir for 0.5h to obtain a moisture rehydrating agent;

[0040] (2) Preparation of composite moisture rehydrating agent: at 32°C, take 100 parts of water, add 43 parts of oxalic acid, 7 parts of sodium edetate, and 5 parts of boric acid, mix well and lower the temperature to 16°C, add 15 parts of egg whit...

Embodiment 3

[0046] A kind of cow shoe upper leather pretreatment method based on seasonal change, comprises the steps:

[0047] (1) Preparation of moisture rehydrating agent: mix 75 parts of maleic anhydride, 55 parts of palmitic acid, 68 parts of trimethylolpropane, 15 parts of polyethylene glycol, 8 parts of xylene, and 3 parts of lithium hydroxide, Under the protection of nitrogen, raise the temperature to 158°C, stir for 1h, then raise the temperature to 195°C, stir for 1h, then remove xylene by distillation under reduced pressure, cool down to 75°C, add 20 parts of ethylene glycol monobutyl ether, then cool down to 22°C, add 105 parts of distilled water, stirred for 0.5h, to obtain a moisture rehydrating agent;

[0048] (2) Preparation of composite moisture rehydrating agent: at 35°C, take 100 parts of water, add 40 parts of oxalic acid, 8 parts of sodium edetate, and 7 parts of boric acid, mix well and lower the temperature to 20°C, add 20 parts of egg white Filler (340, Beijing Li...

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Abstract

The invention discloses a cattle instep leather pretreatment method based on season change and application thereof, and the cattle instep leather pretreatment method comprises the following steps: step (1), based on the weight of wet blue leather, adding 100-120% of water, controlling the temperature at 18-22 DEG C, adding 0.3-0.5% of softening enzyme, 0.5-1.0% of soaking agent and 0.8-1.2% of emulsifier, rotating, then adding 0.1-0.3% of protease and 0.5-1.0% of degreaser, and draining; (2) according to the weight of the wet blue leather, 120-180% of water is added, the temperature is controlled to be 30-35 DEG C, 0.3-0.5% of fatty alcohol and 5-8% of a composite rewetting agent are added, then 1-2% of the composite rewetting agent and 0.5-1% of a degreasing agent are supplemented, and drainage is conducted; (3) according to the weight of the wet blue leather, adding 50-100% of water, controlling the temperature to be 45-50 DEG C, firstly adding 0.5-1% of an emulsifier, 1-2% of a synthetic fatliquor and 1-3% of sulfonated oil, and draining water; according to the method, the technical effects that interfibrous substances and natural grease (beef tallow) among the leather collagen fibers are removed, meanwhile, the leather collagen fibers are relieved, and the leather collagen fibers are recovered to the original length as much as possible are achieved.

Description

technical field [0001] The invention relates to the technical field of tanning, in particular to a method for pretreatment of bovine shoe upper leather based on seasonal change and its application. Background technique [0002] In modern animal husbandry, especially in the advanced animal husbandry in European and American countries, the growth cycle of cattle, pigs, sheep, etc. is getting shorter and shorter, and the time for slaughtering has dropped from the original 3-5 years to 0.5-1 year, and the growth cycle is shortened. , but for the skin collagen fibers, the skin collagen fibers that are not yet fully mature and the stress-preserved raw skin structure, when the seasons change, the skin collagen fibers will appear obvious stress, causing the skin collagen fibers to shrink As a result, the leather collagen fibers are difficult to loosen during subsequent processing, and materials such as tanning agents, fillers, and oils in wet dyeing and finishing are difficult to pe...

Claims

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Application Information

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IPC IPC(8): C14C1/08C14C1/04C14C3/16C14C3/04C14C3/02C14C3/28C14C9/02
CPCC14C1/08C14C1/04C14C3/16C14C3/04C14C3/02C14C3/28C14C9/02
Inventor 姚庆达黄鑫婷杨义清牛泽魏冠凯孙辉永
Owner XINGYE LEATHER TECH CO LTD
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