Preparation process before tanning of leather based on bacterial composition

Abstract

The invention relates to a preparation technology before tanning of leather making based on a bacterial composition. The preparation technology comprises the following steps of pre-soaking, main soaking, liming, washing, deliming, softening, pickling, tanning and cooling. And 150%-200% of water, a probiotic dispersing agent propread, a probiotic degreasing agent propread, a probiotic water soaking auxiliary agent ProSoak, 0.1%-0.2% of the probiotic dispersing agent propread and a liming auxiliary agent are added into the rotary drum. The bacterial composition disclosed by the invention is prepared from the probiotics and the natural raw materials through controlled fermentation, and the bacterial composition is divided into a water soaking auxiliary agent ProSoak, a dispersing agent ProSpread, a degreasing agent ProDegreaze and ProDegreaze Plus according to use purposes, and all of the bacterial composition have certain antibacterial performance; the coating is completely green, all natural, non-toxic, non-corrosive and high in chemical material safety, does not need to be added with a mildew preventive, and reduces peculiar smell in the production process.

Description

Technical Field

[0001] The invention relates to the technical field of leather manufacturing, in particular to a preparation process before leather tanning based on a bacterial composition. Background Art

[0002] With the development and progress of the domestic manufacturing industry, green development and sustainable development have gradually become the new guiding ideology for the development of the manufacturing industry. Under this guiding ideology, some drawbacks of the leather industry have become increasingly obvious. In the traditional soaking and liming process, a large amount of water is used, and the various leather chemicals added cause great pollution to the water body.

[0003] The accounting and reduction of carbon emissions in various industries have become important directions for corporate development. Reducing carbon emissions from leather chemicals during the leather-making process is also one of the directions for carbon reduction. Using more natural and sustainable leather chemicals is conducive to reducing overall carbon emissions.

[0004] With the downturn of the world economy, the consumption desire in world trade is sluggish and trade protectionism is prevalent. At the same time, enterprises need to reduce their production costs in order to gain an advantage in market competition. Reducing the use of chemical materials in the leather making process can significantly reduce the production cost in the leather making process.

[0005] Therefore, based on the above requirements, under the premise of ensuring the performance of finished leather, the water liming process is improved and adjusted by using bacterial composition, the amount of leather chemicals used in the water liming process is reduced, the pollution in this process is reduced, and a new set of green and low-carbon leather tanning preparation process technology is obtained. In view of this, this case was created. Summary of the invention

[0006] The invention provides a preparation process for leather before tanning based on a bacterial composition, so as to solve the problem that the existing leather making process in the soaking and liming stage has a large amount of chemical raw materials used and a large pollution.

[0007] The present invention adopts the following technical solution:

[0008] A preparation process for leather tanning based on a bacterial composition, comprising the following steps: pre-immersion → main immersion → liming → washing → deliming → softening → pickling → tanning → cooling; calculated by weight of wet blue leather;

[0009] Pre-soaking: add 150%-200% water, 0.1%-0.3% probiotic dispersant prospread, 10.0%-20.0% probiotic degreasing agent prodegreaze, 0.1%-0.2% soda ash into the drum, rotate for 30 minutes and stop for 30 minutes twice; remove the flesh;

[0010] Main soaking: add water 150%-200%, probiotic dispersant prospread 0.1%-0.3%, probiotic soaking aid ProSoak 0.1%-0.3%, rotate for 30 minutes and stop for 30 minutes; add pH stabilizer, soda ash 0.1%-0.2%, rotate for 30 minutes and stop for 30 minutes; add soda ash 0.1%-0.2%, wash with water, rotate for 30 minutes and stop for 30 minutes to drain twice;

[0011] Liming: add water 80%-100%, probiotic dispersant prospread 0.1%-0.2%, liming aid, sodium sulfide 0.1%-0.2%, rotate for 50min; add calcium oxide 1.0%-1.2%, rotate for 10min and stop for 20min twice; add sodium hydrosulfide 0.9%-1.0%, liming enzyme, rotate for 20min and stop for 20min; add sodium hydrosulfide 0.1%-0.2%, sodium sulfide 0.1%-0.3%, calcium oxide 0.1%-0.6%, rotate for 10min and stop for 20min three times; add liming aid 0.1%-0.5%, sodium sulfide 0.1%-0.4%, calcium oxide 0.1%-0.6%, rotate for 10min and stop for 20min six times; add water 30%, calcium oxide 0.1%-0.4%, rotate for 10min and stop for 20min three times; add water 70%, rotate for 2min and stop for 58min overnight; wash with water, remove the drum, remove the flesh, and peel.

[0012] Furthermore, the above-mentioned pre-soaking: add 200% water, 0.3% probiotic dispersant prospread, 20.0% probiotic degreasing agent prodegreaze, 0.2% soda ash into the drum, rotate for 30 minutes and stop for 30 minutes twice; remove the flesh.

[0013] Furthermore, the main soaking: adding 150% water, probiotic dispersant prospread 0.1%, probiotic soaking aid ProSoak 0.3%, rotating for 30 minutes and stopping for 30 minutes; adding pH stabilizer, soda ash 0.2%, rotating for 30 minutes, stopping for 30 minutes; adding soda ash 0.2%, washing with water, rotating for 30 minutes and stopping for 30 minutes, and draining twice.

[0014] Further, the above liming: adding 80% water, probiotic dispersant prospread 0.2%, liming aid, sodium sulfide 0.2%, rotating for 50 minutes; adding 1.2% calcium oxide, rotating for 10 minutes and stopping for 20 minutes twice; adding 0.9% sodium hydrosulfide, liming enzyme, rotating for 20 minutes and stopping for 20 minutes; adding 0.2% sodium hydrosulfide, 0.3% sodium sulfide, 0.6% calcium oxide, rotating for 10 minutes and stopping for 20 minutes three times; adding 0.5% liming aid, 0.4% sodium sulfide, 0.6% calcium oxide, rotating for 10 minutes and stopping for 20 minutes six times; adding 30% water, 0.4% calcium oxide, rotating for 10 minutes and stopping for 20 minutes three times; adding 70% water, rotating for 2 minutes and stopping for 58 minutes overnight; washing with water, drumming, removing flesh, and peeling.

[0015] Further, the above deliming-pickling-tanning: add 200% water to the drum, the temperature is 30°C, add 0.3% deliming agent, add 0.05% degreasing agent, and rotate for 20 minutes; add 10% water, add 0.2% sodium pyrosulfite, 0.3% deliming agent, and rotate for 30 minutes; softening enzyme, rotate for 30 minutes; add 200% water, the temperature is 18°C, and rotate for 10 minutes, repeat twice; drain; add 30% water, the temperature is 20°C, add 5% sodium chloride, add 0.1% electrolytic grease, and rotate for 10 minutes; add 0.6% formic acid, and rotate for 10 minutes; add chromium solution 6 0%, rotate for 10 minutes; add 1.15% and 0.05% sulfuric acid twice, rotate for 10 minutes and 40 minutes respectively; add 3% and 3.5% chromium powder respectively, rotate for 30 minutes and 90 minutes respectively; add 0.5% sodium formate, rotate for 30 minutes; add 0.15%, 0.15%, 0.2% alkalizer three times, rotate for 60 minutes, 60 minutes and 240 minutes respectively; add 80% chromium solution, add 0.15% mildew inhibitor, rotate for 240 minutes; drain; add 100% water, add 0.05% mildew inhibitor, rotate for 5 minutes; drain and remove from the drum.

[0016] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following advantages:

[0017] 1. The present application introduces a bacterial composition in the pre-soaking, soaking and liming processes, which can reduce surface tension and has dispersibility and degreasing properties. The auxiliary agent is a bacterial composition composed of beneficial microorganisms, which is made by controlling the fermentation of natural raw material metabolites. This bacterial composition can meet the process requirements of raw hide soaking and liming, can effectively replace the use of degreasing agents, mildew inhibitors, surfactants, soaking aids, and liming aids, and has excellent chemical compatibility.

[0018] 2. In the process of optimizing the process, this application significantly reduces the use of chemical materials such as soaking agents, bactericides and degreasing agents, so as to reduce the chemical load in the production process and improve cost-effectiveness.

[0019] 3. Since the bacterial composition of this application is made of probiotics and natural raw materials through controlled fermentation, it is divided into soaking aid ProSoak, dispersant ProSpread, degreaser ProDegreaze and ProDegreazePlus according to the purpose of use, all of which have certain antibacterial properties; it is completely green, all natural, non-toxic, non-corrosive, with high chemical safety, and no need to add mildew inhibitors, reducing odor during the production process.

[0020] 4. This application successfully reduces the use of soaking agents, bactericides and degreasing agents by optimizing the chemical material formula, further reducing production costs and environmental impact. Since the bacterial composition derived from natural fermentation products is used to replace petrochemical products, the environmental benefits are good.

[0021] 5. The bacterial composition of the present application is mild, specific and efficient, and the wet blue leather prepared is clean, plump and firm, and its physical and chemical properties are improved compared with the traditional process. DETAILED DESCRIPTION

[0022] A preparation process for leather tanning based on a bacterial composition, comprising the following steps: pre-immersion → main immersion → liming → washing → deliming → softening → pickling → tanning → cooling;

[0023] The above-mentioned pre-soaking water: add 200% water, 0.3% probiotic dispersant prospread (Proviera, USA), 20.0% probiotic degreasing agent prodegreaze or ProDegreazePlus (Proviera, USA), 0.2% soda ash into the drum, rotate for 30 minutes and stop for 30 minutes twice; remove the flesh.

[0024] The above main soaking: add 150% water, 0.1% probiotic dispersant prospread (Proviera, USA), 0.3% probiotic soaking aid ProSoak (Proviera, USA), rotate for 30 minutes and stop for 30 minutes; add pH stabilizer (MX, Brothers Technology Co., Ltd.), 0.2% soda ash, rotate for 30 minutes, stop for 30 minutes; add 0.2% soda ash, wash with water, rotate for 30 minutes and stop for 30 minutes, and drain twice.

[0025] The above liming: adding 80% water, probiotic dispersant prospread (Proviera Company, USA) 0.2%, liming aid (B12 Boska (Shangqiu) Chemical Co., Ltd.), 0.2% sodium sulfide, rotating for 50 minutes; adding 1.2% calcium oxide, rotating for 10 minutes and stopping for 20 minutes twice; adding 0.9% sodium hydrosulfide, liming enzyme (HLV, Tang Pu Le New Materials Jiaxing Co., Ltd.), rotating for 20 minutes and stopping for 20 minutes; adding 0.2% sodium hydrosulfide, 0.3% sodium sulfide, 0.6% calcium oxide, rotating for 10 minutes and stopping for 20 minutes three times; adding 0.5% liming aid, 0.4% sodium sulfide, 0.6% calcium oxide, rotating for 10 minutes and stopping for 20 minutes six times; adding 30% water, 0.4% calcium oxide, rotating for 10 minutes and stopping for 20 minutes three times; adding 70% water, rotating for 2 minutes and stopping for 58 minutes overnight; washing with water, drumming, removing meat, and peeling.

[0026] The above deliming-pickling-tanning: add 200% water to the drum, the temperature is 30°C, add 0.3% deliming agent (HT-A, Zibo Haohai Chemical Co., Ltd.), add 0.05% degreasing agent (W100, Boska (Shangqiu) Chemical Co., Ltd.), and rotate for 20 minutes; add 10% water, add 0.2% sodium pyrosulfite, 0.3% deliming agent (HT-A, Zibo Haohai Chemical Co., Ltd.), and rotate for 30 minutes; softening enzyme, rotate for 30 minutes; add 200% water, the temperature is 18°C, and rotate for 10 minutes, repeat twice; drain; add 30% water, the temperature is 20°C, add 5% sodium chloride, add 0.1% electrolysis-resistant grease (B1, Jinjiang Qiangde Material Trading Co., Ltd.), and rotate for 10 minutes ; Add 0.6% formic acid and rotate for 10 minutes; add 60% chromium solution and rotate for 10 minutes; add 1.15% and 0.05% sulfuric acid twice, rotate for 10 minutes and 40 minutes respectively; add 3% and 3.5% chromium powder respectively, rotate for 30 minutes and 90 minutes respectively; add 0.5% sodium formate and rotate for 30 minutes; add 0.15%, 0.15%, and 0.2% alkalizer three times, rotate for 60 minutes, 60 minutes, and 240 minutes respectively; add 80% chromium solution, add 0.15% mildew inhibitor (30L, Buckman Laboratory Chemical (Shanghai) Co., Ltd.), rotate for 240 minutes; drain; add 100% water, add 0.05% mildew inhibitor, rotate for 5 minutes; drain and remove from the drum.

[0027] The remaining processes are carried out according to conventional processes.

[0028] The technical solution of this application is compared with the conventional process, as follows:

[0029] Table 1 Process comparison table

[0030]

[0031]

[0032] The cow upper leather obtained in Example 1 was tested as follows:

[0033] Table 1 Comparison of sensory properties of wet blue leather

[0034]

[0035] Table 3 Comparison of physical and chemical properties of wet blue leather

[0036]

[0037] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A preparation process for leather tanning based on a bacterial composition, characterized in that: The process comprises the following steps: pre-soaking → main soaking → liming → washing → deliming → softening → pickling → tanning → cooling; pre-soaking: adding 150%-200% water, 0.1%-0.3% probiotic dispersant prospread, 10.0%-20.0% probiotic degreasing agent prodegreaze, 0.1%-0.2% soda ash into the drum, rotating for 30 minutes and stopping for 30 minutes twice; fleshing; Main soaking: add water 150%-200%, probiotic dispersant prospread 0.1%-0.3%, probiotic soaking aid ProSoak 0.1%-0.3%, rotate for 30 minutes and stop for 30 minutes; add pH stabilizer, soda ash 0.1%-0.2%, rotate for 30 minutes and stop for 30 minutes; add soda ash 0.1%-0.2%, wash with water, rotate for 30 minutes and stop for 30 minutes to drain twice; Liming: add water 80%-100%, probiotic dispersant prospread 0.1%-0.2%, liming aid, sodium sulfide 0.1%-0.2%, rotate for 50min; add calcium oxide 1.0%-1.2%, rotate for 10min and stop for 20min twice; add sodium hydrosulfide 0.9%-1.0%, liming enzyme, rotate for 20min and stop for 20min; add sodium hydrosulfide 0.1%-0.2%, sodium sulfide 0.1%-0.3%, calcium oxide 0.1%-0.6%, rotate for 10min and stop for 20min three times; add liming aid 0.1%-0.5%, sodium sulfide 0.1%-0.4%, calcium oxide 0.1%-0.6%, rotate for 10min and stop for 20min six times; add water 30%, calcium oxide 0.1%-0.4%, rotate for 10min and stop for 20min three times; add water 70%, rotate for 2min and stop for 58min overnight; wash with water, remove the drum, remove the flesh, and peel.

2. A preparation process for leather tanning based on a bacterial composition according to claim 1, characterized in that: The pre-soaking process comprises adding 200% water, 0.3% probiotic dispersant prospread, 20.0% probiotic degreasing agent prodegreaze, and 0.2% soda ash into a rotating drum, rotating for 30 minutes and stopping for 30 minutes twice; and removing the flesh.

3. A preparation process for leather tanning based on a bacterial composition as claimed in claim 1, characterized in that: The main soaking process includes: adding 150% water, 0.1% probiotic dispersant prospread, 0.3% probiotic soaking aid ProSoak, rotating for 30 minutes and stopping for 30 minutes; adding pH stabilizer and 0.2% soda ash, rotating for 30 minutes and stopping for 30 minutes; adding 0.2% soda ash, washing with water, rotating for 30 minutes and stopping for 30 minutes to drain twice.

4. A preparation process for leather tanning based on a bacterial composition according to claim 1, characterized in that: The liming process comprises the following steps: adding 80% water, 0.2% probiotic dispersant prospread, 0.2% liming aid, and 0.2% sodium sulfide, and rotating for 50 minutes; adding 1.2% calcium oxide, rotating for 10 minutes and stopping for 20 minutes twice; adding 0.9% sodium hydrosulfide and liming enzyme, rotating for 20 minutes and stopping for 20 minutes; adding 0.2% sodium hydrosulfide, 0.3% sodium sulfide, and 0.6% calcium oxide, and rotating for 10 minutes and stopping for 20 minutes three times; adding 0.5% liming aid, 0.4% sodium sulfide, and 0.6% calcium oxide, and rotating for 10 minutes and stopping for 20 minutes six times; adding 30% water and 0.4% calcium oxide, and rotating for 10 minutes and stopping for 20 minutes three times; adding 70% water, rotating for 2 minutes and stopping for 58 minutes overnight; washing with water, drumming out, removing flesh, and peeling.

5. A preparation process for leather tanning based on a bacterial composition according to claim 1, characterized in that: The deliming-pickling-tanning process includes: adding 200% water to a drum, the temperature is 30°C, adding 0.3% deliming agent, adding 0.05% degreasing agent, rotating for 20 minutes; adding 10% water, adding 0.2% sodium pyrosulfite, adding 0.3% deliming agent, rotating for 30 minutes; softening enzyme, rotating for 30 minutes; adding 200% water, the temperature is 18°C, rotating for 10 minutes, repeating twice; draining; adding 30% water, the temperature is 20°C, adding 5% sodium chloride, adding 0.1% electrolysis-resistant grease, rotating for 10 minutes; adding 0.6% formic acid, rotating for 10 minutes; Add 60% chromium solution and rotate for 10 minutes; add 1.15% and 0.05% sulfuric acid twice, rotate for 10 minutes and 40 minutes respectively; add 3% and 3.5% chromium powder respectively, rotate for 30 minutes and 90 minutes respectively; add 0.5% sodium formate and rotate for 30 minutes; add 0.15%, 0.15%, and 0.2% alkalizer three times, rotate for 60 minutes, 60 minutes, and 240 minutes respectively; Add 80% chromium solution, add 0.15% mildew preventer, rotate for 240 minutes; drain; add 100% water, add 0.05% mildew preventer, rotate for 5 minutes; drain and remove from the drum.

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