CN103725810A - Method for tanning sheep shorn-pile - Google Patents
Method for tanning sheep shorn-pile Download PDFInfo
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Abstract
The invention discloses a method for tanning sheep shorn-pile. The method comprises the following steps: 11) degreasing, namely, adding water into a paddle-tumbler, subsequently adding degreasing agent, an enzymic preparation and sodium carbonate, adjusting the pH value of a first solution to be 7.3-7.8 so as to obtain a first solution, and stirring the first solution; 12) tanning the degreased fur by using an organic phosphine tanning agent; 13) oxidizing to remove the residual tanning agent; 14) re-tanning the fur after the oxidation is accomplished; 15) whitening, wet-grinding, cleaning, drying and settling the fur. According to the method for tanning sheep shorn-pile, the pickling step in the conventional tanning method is replaced by the degreasing step, and the purpose of opening the fiber of the fur is achieved by using the enzymic preparation used in the degreasing step instead of acid used in the pickling step, so that the purposes of reducing damage to human bodies in the pickling step and reducing environment pollution caused by a waste pickling liquid are achieved.
Description
Technical field
The present invention relates to sheep shorn velvet processing technique field, particularly a kind of process for tanning of sheep shorn velvet.
Background technology
Sheep shorn velvet secondary industry is the important traditional light industry industry of China, is also one of the comparatively serious industry that discharges pollutants.In the processing industry of sheep shorn velvet, because the superiority of leather is made in chrome tannage, at present, in China's existing sheep shorn velvet complete processing, there is more than 100 year historical traditional chromium tannage and remain the main process for tanning of sheep shorn velvet manufacture field, due to chromic toxicity, the use of chromic salts causes great harm to ecotope, people and animals, mankind itself's survival and development have been formed to great threat, along with the continuous enhancing of people's environmental protection, health perception, the harm of the objectionable impurities that process for tanning produces to the mankind, causes that society and the public more and more pay close attention to.
On the one hand, in traditional chromic tanning, chrome tanning aste chromium bit cannot be utilized effectively, a large amount of losses of the waste collagen producing in tanning industry have been caused, but also brought serious environmental pollution, on the other hand, China's chromium resource shortage, process hides chromium used almost leans on import entirely, in national defence and some high technology industries, the demand of chromium is also more and more in recent years, cause the price of chromium to be climbed to a higher point year after year, in addition, as the European Union of one of China's Foreign Trade main object, the multinomial technology barriers for sexavalent chrome and formaldehyde and total chrome content have successively been formulated in recent years.
Therefore, the pollution problem that solves the processing industry of sheep shorn velvet is very urgent, especially pollution of chromium, but the basic way that solves pollution of chromium can only be thoroughly to abandon chrome tanning, thereby, greatly develop Chrome-free road, few chrome tanning technology, be not only the needs of environment, also be the only way that guarantees sheep shorn velvet processing industry Sustainable development, through making great efforts for many years of scientific research personnel, invented much chrome-free tanning technique.
But, in current sheep shorn velvet process for tanning, even chrome-free tanning, or even metal-free tanning, tannery all needs through pickling step, wherein, the object of pickling step is to make the fiber of fur to open, so that the infiltration of material in subsequent handling, therefore, in the operating process of pickling step, part volatile acid will bring irritating smell, to human body, is disadvantageous, caused environmental pollution to a certain degree simultaneously, and pickling step need to be added a large amount of Industrial Salts in solution, does not meet the regulation of national environmental protection.
In sum, how to improve the process for tanning of sheep shorn velvet, avoid the harm that pickling step brings human body and reduce the problem of environmental pollution that pickling waste liquid brings, become the current technical issues that need to address of those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of process for tanning of sheep shorn velvet, can be by improving the process for tanning of sheep shorn velvet, avoid the harm that pickling step brings human body and reduce the problem of environmental pollution that pickling waste liquid brings.
For addressing the above problem, the invention provides following technical scheme:
A process for tanning for sheep shorn velvet, comprises the following steps:
11) degreasing adds water in paddle-tumble, then adds grease-removing agent, zymin and soda ash, and the pH value of adjusting the first solution is 7.3-7.8, obtains the first solution, and stirs the first solution;
12), to the fur after degreasing, carry out tanning with organic phosphine tanning agent;
13) residual organic phosphine tanning agent is removed in oxidation;
14) fur is carried out to retanning after completing oxidation;
15) to fur bleach, wet-milling, cleaning, dry and finishing technique.
Preferably, in the process for tanning of above-mentioned sheep shorn velvet, in described step 11), in paddle-tumble, with the ratio of every sheepskin 20-40kg water, add appropriate water; The concentration that adds rear grease-removing agent is 0.5-1.5g/L; The concentration of zymin is 1.5-3g/L; The concentration of soda ash is 0.4-0.6g/L; Stirring mode is stopped 40-20 minute for 20-40 minute for rotating, and corotation moves 2-4 hour.
Preferably, in the process for tanning of above-mentioned sheep shorn velvet, described tanning specific implementation is:
21) in paddle-tumble, add water, regulate water temperature to 25-35 ℃, then add iron removing reagent and stir 4-6 minute;
22) to adding in the solution of iron removing reagent, add organic phosphine tanning agent, continue to stir 150-210 minute, then continue to be warming up to 30-40 ℃, obtain the second solution;
23) in the second solution, add soda ash, regulate the pH value of the second solution to 6.0-6.5.
Preferably, in the process for tanning of above-mentioned sheep shorn velvet, described oxidation specific implementation is:
31) in paddle-tumble, add water, regulate water temperature to 40-50 ℃, add after iron removing reagent, grease-removing agent, obtain the 3rd solution, stir 4-6 minute;
32) in the 3rd solution, add Sodium hexametaphosphate 99 and stir 5-15 minute, obtain the 4th solution;
33) in the 4th solution, add hydrogen peroxide and stir 5-15 minute, obtain the 5th solution;
34) in the 5th solution, add soda ash, the pH value of regulator solution, to 8.5-9.0, obtains the 6th solution;
35) continue to stir the 6th solution, stirring mode is per half an hour of 8-12 minute, and corotation moves 1-3 hour, afterwards discharge opeing.
Preferably, in the process for tanning of above-mentioned sheep shorn velvet, described retanning specific implementation is:
41) in paddle-tumble, add water, regulate water temperature to 35-45 ℃, after take a policy powder and DLE, obtain the 7th solution, stir 4-6 minute;
42) in the 7th solution, add sulfuric acid, obtain the 8th solution, stir 8-12 minute;
43) in the 8th solution, again add sulfuric acid, obtain the 9th solution, continue to stir the 9th solution 100-150 minute.
Preferably, in the process for tanning of above-mentioned sheep shorn velvet, described bleaching specific implementation is:
51) in paddle-tumble, add water, regulate water temperature to 50-60 minute, add iron removing reagent and stir 4-6 minute, obtain the tenth solution;
52) in the tenth solution, add grease-removing agent and vat powder continuation stirring within 50-70 minute, to obtain the 11 solution;
53) in the 11 solution, add formic acid and stir 10-30 minute, again add afterwards formic acid, and continue to stir discharge opeing after 10-30 minute.
Preferably, in the process for tanning of above-mentioned sheep shorn velvet, described cleaning is specifically embodied as:
In paddle-tumble, add water, regulate water temperature to 25-35 ℃, add iron removing reagent, hydrogen peroxide and wool softener, obtain the 12 solution, stir 25-35 minute, afterwards discharge opeing.
Preferably, in the process for tanning of above-mentioned sheep shorn velvet, the zymin described in step 11) is proteolytic enzyme.
Preferably, in the process for tanning of above-mentioned sheep shorn velvet, step 22) described in organic phosphine tanning agent be Tetrakis hydroxymethyl phosphonium chloride or tetra methylol phosphoric sulfide.
Preferably, in the process for tanning of above-mentioned sheep shorn velvet, described step 12) also comprises the recycling to tanning waste liquid; Described step 14) also comprises the recycling to retanning waste liquid.
Above-mentioned background technology relatively, the process for tanning of sheep shorn velvet provided by the present invention, replaced the pickling step in traditional process for tanning with defatting step, in defatting step, apply zymin and replaced the acid of using in pickling step to reach the object that the fiber of fur is opened, effectively realized and reduced the harm that pickling step brings human body and reduce the object of the environmental pollution that pickling waste liquid brings.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the process for tanning of sheep shorn velvet provided by the present invention.
Embodiment
Core of the present invention is to provide a kind of process for tanning of sheep shorn velvet, can be by improving the process for tanning of sheep shorn velvet, and avoid the harm that pickling step brings human body and reduce the environmental pollution that pickling waste liquid brings.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Incorporated by reference to Fig. 1, Fig. 1 is the schematic flow sheet of the process for tanning of sheep shorn velvet provided by the present invention.
The process for tanning of the sheep shorn velvet that the embodiment of the present invention provides, comprises the following steps:
Step S11, degreasing:
In paddle-tumble, add water, then add grease-removing agent, zymin and soda ash, the pH value of adjusting the first solution is 7.3-7.8, obtains the first solution, and stirs the first solution.
Concrete, when carrying out degreasing operation, in paddle-tumble, with the ratio of every sheepskin 20-40kg water, add appropriate water, be preferably in the present embodiment 30kg, then in paddle-tumble, add grease-removing agent, zymin and soda ash, making to add the concentration of rear grease-removing agent is 0.5-1.5g/L, the concentration of zymin is 1.5-3g/L, in the present embodiment, the concentration of grease-removing agent is preferably 1g/L, the concentration of zymin is preferably 1.5g/L, making to add the concentration of rear soda ash is 0.4-0.6g/L, in the present embodiment, the concentration of preferred soda ash is 0.5g/L, adjust the pH value of the first solution to 7.3-7.8, then stir the first solution, stirring mode is stopped 40-20 minute for 20-40 minute for rotating, corotation moves 2-4 hour, stirring time to the first solution and the mode of stirring can be determined corresponding mode according to the particular case in the sheep shorn velvet course of processing, in the present embodiment, the stirring mode of the first solution is preferably to rotate and within 30 minutes, stops 30 minutes, turn and stop circulation 3 hours altogether, discharge opeing afterwards, wherein, in the present embodiment, zymin is proteolytic enzyme.
Step S12, carries out tanning to the fur after degreasing with organic phosphine tanning agent.
Step S13, residual tanning agents is removed in oxidation:
Because in tanning operation, to use organophosphorus tanning agent to carry out tanning meeting to fur and bring formaldehyde, the object of oxidation is to remove residual organophosphorus tanning agent, reduces the content of formaldehyde in fur.
Step S14, retanning:
Use retanning agent to carry out retanning to tanned fur, guarantee that fur has higher quality.
Step S15, bleaching, wet-milling, cleaning, dry and finishing technique:
After retanning completes, fur is bleached, afterwards to fur wet-milling, concrete wet grinding operation is, on wet wheeling machine, the meat slag on dermatotome is processed, after wet-milling, the meat slag on dermatotome is cleaned out, after wet-milling completes, fur is cleaned, is dried and follow-up finishing technique.
The process for tanning of sheep shorn velvet provided by the present invention, replaced the pickling step in traditional process for tanning with defatting step, in defatting step, apply zymin and replaced the acid of using in pickling step to reach the object that the fiber of fur is opened, effectively realized and reduced the harm that pickling step brings human body and reduce the object of the environmental pollution that pickling waste liquid brings.
In a specific embodiment of the present invention, the process for tanning process specific implementation in the process for tanning of sheep shorn velvet is:
Step S21 adds water in paddle-tumble, regulates water temperature to 25-35 ℃, then adds iron removing reagent and stirs 4-6 minute.
Concrete, in paddle-tumble, with the ratio of every sheepskin 20-40kg water, add appropriate water, be preferably in the present embodiment 30kg, according to the particular case in the sheep shorn velvet course of processing, regulate water temperature to 25-35 ℃ afterwards, in the present embodiment, preferred version is, water temperature is adjusted to 30 ℃, Xiang Shuizhong adds iron removing reagent, the concentration that makes iron removing reagent is 0.1-0.5g/L, the concentration of preferred iron removing reagent is 0.3g/L and stirs solution, the practical situation of the set basis sheep shorn velvet course of processing of concrete stirring time are determined, in the present embodiment solution rotation time are set as to 5 minutes.
Step S22, adds organic phosphine tanning agent to adding in the solution of iron removing reagent, continues to stir 150-210 minute, then continues to be warming up to 30-40 ℃, obtains the second solution.
Concrete, to adding in the solution of iron removing reagent, add organic phosphine tanning agent, ratio with every sheepskin 100-150g adds, in the present embodiment, preferably add-on is 120g, continue to stir 150-210 minute, set the time of stirring according to the practical situation in the course of processing of sheep shorn velvet, in the present embodiment, the preferred stirring time is 180 minutes, then continue to be warming up to 35 ℃, obtain the second solution.
In an embodiment of the present invention, what the tanning agent in process for tanning adopted is organic phosphine tanning agent, has realized metal-free tanning, has avoided in the process for tanning of traditional sheep shorn velvet, uses containing metal tanning agent to carry out to sheep shorn velvet the environmental pollution that tanning causes.
Simultaneously, organic phosphine tanning agent self is colourless, and its flexibility is good, utilize the woolen velvet product of organic phosphine tanning agent tanning, plate face is pure white, and the shrinkage temperature of woolen velvet product is more than 85 ℃, the content of plate face grease is low, do not need to dry-clean processing, finished leather has good flame retardant resistance, preservative property and good natural degradation, and finished leather and waste material can not produce the problem of poisonous metal and formaldehyde pollution.
Step S23 adds soda ash in the second solution, regulates the pH value of the second solution to 6.0-6.5.Within the scope of above-mentioned pH value, the tanning effect of tanning solution is best.
In order to guarantee sheep shorn velvet to carry out the effect of tanning, in the second solution, add soda ash, start to adjust alkali, adjust the mode of alkali to be, in every 20-40 point clockwise the second solution, add soda ash one time, and the ratio that at every turn need add 0.5-1.5g soda ash with every liter of solution adds, add altogether four times, in the present embodiment, the preferred alkali mode of adjusting is, in every 30 points of clockwise second solution, add soda ash one time, and the ratio that at every turn need add 1g soda ash with every liter of solution adds, add altogether four times, even take the water yield that added in paddle-tumble when 30kg calculates, to add the amount of soda ash in solution at every turn, be 30g, according to the actual amount of water in paddle-tumble, according to aforementioned proportion, in solution, add soda ash, adjust alkali, the pH value of the second solution is adjusted to 6.0-6.5, those skilled in the art can set the alkali mode of adjusting according to practical situation, in the scope of this pH value, organic phosphine tanning agent is utilized to the fullest, the tanning effect of sheep shorn velvet is best, the organic phosphine tanning agent adding in wherein tanning step can be Tetrakis hydroxymethyl phosphonium chloride or tetra methylol phosphoric sulfide.
In the present invention, the tanning agent that the process for tanning of sheep shorn velvet is used is organic phosphine tanning agent, therefore, in a specific embodiment of the present invention, after this step of the process for tanning of sheep shorn velvet is completed, also need sheep shorn velvet to carry out oxide treatment, need in the solution that sheep shorn velvet is oxidized, add hydrogen peroxide and soda ash.
Oxidation step specific implementation in the process for tanning of sheep shorn velvet is in an embodiment of the present invention:
Step S31 adds water in paddle-tumble, regulates water temperature to 40-50 ℃, adds after iron removing reagent, grease-removing agent, obtains the 3rd solution, stirs 4-6 minute.
Concrete, in paddle-tumble, with the ratio of every sheepskin 20-40kg water, add appropriate water, be preferably in the present embodiment 30kg, water temperature is adjusted to 40-50 ℃, preferably temperature is 45 ℃ in the present embodiment, in paddle-tumble, add iron removing reagent and grease-removing agent, making to add the concentration of rear iron removing reagent is 0.1-0.3g/L, the concentration of grease-removing agent is 1-3g/L, in the present embodiment, the concentration of preferred iron removing reagent is 0.2g/L, the concentration of grease-removing agent is 2g/L, obtain the 3rd solution, stir the 3rd solution, according to practical situation, set the stirring time, in the present embodiment, preferably the time is stirring 5 minutes.
Step S32 adds Sodium hexametaphosphate 99 and stirs 5-15 minute in the 3rd solution, obtains the 4th solution.
Concrete, in the 3rd solution, add Sodium hexametaphosphate 99, the concentration that makes Sodium hexametaphosphate 99 is 1-2g/L, preferably, in the present embodiment, the concentration of Sodium hexametaphosphate 99 is 1.5g/L, stirs the 3rd solution, according to practical situation, sets the stirring time, in the present embodiment, preferably the time, for stirring 10 minutes, obtains the 4th solution.
Step S33 adds hydrogen peroxide and stirs 5-15 minute in the 4th solution, obtains the 5th solution.
Concrete, in the 4th solution, add hydrogen peroxide, the concentration that makes hydrogen peroxide is 8-14g/L, preferably, in the present embodiment, the concentration that makes hydrogen peroxide is 12g/L, stir the 4th solution, according to practical situation, set the stirring time, in the present embodiment, preferably the time, for stirring 10 minutes, obtains the 5th solution after having stirred.
Step S34 adds soda ash in the 5th solution, and the pH value of regulator solution, to 8.5-9.0, obtains the 6th solution.
Concrete, in the 5th solution, add soda ash to regulate pH value, adjust alkali mode to be: in every 5-15 point clockwise the 5th solution, to add soda ash one time, and the ratio that at every turn need add 0.4-0.8g soda ash with every liter of solution adds, add altogether four times, preferably, tune alkali mode in the present embodiment is: in every 10 points of clockwise the 5th solution, add soda ash one time, and the ratio that at every turn need add 0.6g soda ash with every liter of solution adds, add altogether four times, even take the water yield that added in paddle-tumble when 30kg calculates, to add the amount of soda ash in the 5th solution at every turn, be 18g, according to the actual amount of water in paddle-tumble, according to aforementioned proportion, in the 5th solution, add soda ash, adjust alkali, the pH value of the 5th solution is adjusted to 8.5-9.0, obtain the 6th solution, tune alkali mode in the present embodiment is preferred version, those skilled in the art can set other concrete scheme according to practical situation.
Step S35, continues to stir the 6th solution, and stirring mode is per half an hour of 8-12 minute, and corotation moves 1-3 hour, afterwards discharge opeing.
While stirring the 6th solution, according to practical situation, set the stirring time, the present embodiment preferred version is to turn 10 minutes per half an hour, and moving two hours of corotation, discharges the liquid in paddle-tumble afterwards.
In an embodiment of the present invention, owing to having used organic phosphine tanning agent, and organic phosphine tanning agent can bring formaldehyde, therefore, need to be oxidized to the sheep shorn velvet in the course of processing residual organic phosphine tanning agent in tannery before the object of oxidation is to remove, the content of formaldehyde in minimizing leather.
Wherein, the essential substance in oxidising process is hydrogen peroxide and soda ash, and other materials that add in solution are in order to make the tanning better effects if of sheep shorn velvet, and the pH value scope of preferred oxidizing solution is 8.5-9.0.
In order to make sheep shorn velvet after processing, its fur is more abundant, and feel is better, and in a specific embodiment of the present invention, the process for tanning of sheep shorn velvet comprises retanning, and wherein, the specific implementation step of retanning is:
Step S41 adds water in paddle-tumble, regulates water temperature to 35-45 ℃, obtains the 7th solution after take a policy powder and DLE, stirs 4-6 minute.
Concrete, in paddle-tumble, with the ratio of every sheepskin 20-40kg water, add appropriate water, be preferably in the present embodiment 30kg, water temperature is adjusted to 35-45 ℃, in the present embodiment, preferably temperature is 40 ℃, to take a policy in paddle-tumble powder and DLE, wherein DLE(Basyntan DLE) be retanning agent, the DLE using in embodiment is produced by BASF AG, the concentration that makes vat powder is 0.1-0.3g/L, the concentration that makes DLE is 3-6g/L, preferably, in the present embodiment, the concentration that makes vat powder is 0.2g/L, the concentration that makes DLE is 5g/L, obtain the 7th solution, rotate the 7th solution, set suitable rotation time, in the present embodiment, be preferably and rotate 5 minutes.
Step S42 adds sulfuric acid in the 7th solution, obtains the 8th solution, stirs 8-12 minute.
After stirring completes, in the 7th solution, add sulfuric acid, the concentration that makes sulfuric acid is 0.2-0.5g/L, and preferred, making the concentration of sulfuric acid is 0.3g/L, obtains the 8th solution and rotates 10 minutes.
Step S43 again adds sulfuric acid in the 8th solution, obtains the 9th solution, continues to stir the 9th solution 100-150 minute.
In the 8th solution, again add sulfuric acid, the sulfuric acid amount adding before not considering, and to make the concentration 0.2-0.5g/L of the sulfuric acid again adding, preferably, the concentration 0.3g/L of the sulfuric acid again adding, continues to stir the 9th solution 100-150 minute, and preferred rotation time is 120 minutes.
In a specific embodiment of the present invention, the blanching step specific implementation in the process for tanning of sheep shorn velvet is:
Step S51 adds water in paddle-tumble, regulates water temperature to 50-60 ℃, adds iron removing reagent and stirs 4-6 minute, obtains the tenth solution.
Concrete, in paddle-tumble, with the ratio of every sheepskin 20-40kg water, add appropriate water, be preferably in the present embodiment 30kg, water temperature is adjusted to 50-60 ℃, in the present embodiment, preferably temperature is 55 ℃, add iron removing reagent, the concentration that makes iron removing reagent is 0.2-0.5g/L, and preferred, the concentration that makes iron removing reagent is 0.4g/L, rotate 5 minutes, obtain the tenth solution.
Step S52 adds grease-removing agent and vat powder continuation stirring within 50-70 minute, to obtain the 11 solution in the tenth solution.
In the tenth solution, add grease-removing agent and vat powder, making to add the concentration of rear grease-removing agent is 1-3g/L, the concentration of vat powder is 2-5g/L, preferably, making to add the concentration of rear grease-removing agent is 2g/L, the concentration of vat powder is 3g/L, continues to stir to obtain the 11 solution in 50-70 minute, and in the present embodiment, preferred rotation time is 60 minutes.
Step S53 adds formic acid and stirs 10-30 minute in the 11 solution, again adds afterwards formic acid, and continues to stir discharge opeing after 10-30 minute.
In the 11 solution, add formic acid, the concentration that makes formic acid is 0.3-0.8g/L, and preferred, the concentration that makes formic acid is 0.5g/L, rotate 20 minutes, again add formic acid, the amount of formic acid adding before not considering, and will to make the concentration of the formic acid again adding be 0.3-0.8g/L, preferably, the concentration that makes formic acid is 0.5g/L, rotates after 20 minutes, and waste liquid is discharged.
The object of powder of taking a policy in the embodiment of the present invention is to remove hydrogen peroxide residual in oxidising process and fur is bleached, and wherein the vat powder is here preferably V-Brite B.
In order to remove the residual peculiar smell causing of vat powder in bleaching process, need clean sheep shorn velvet, in cleaning solution, take the circumstances into consideration to add hydrogen peroxide, in a specific embodiment of the present invention, the cleaning step specific implementation in the process for tanning of sheep shorn velvet is:
In paddle-tumble, add water, regulate water temperature to 25-35 ℃, add iron removing reagent, hydrogen peroxide and wool softener, obtain the 12 solution, stir 25-35 minute, afterwards discharge opeing.
Preferred version concrete in this step is, in paddle-tumble, with the ratio of every sheepskin 20-40kg water, add appropriate water, be preferably in the present embodiment 30kg, regulate water temperature in 25-35 ℃ of the present embodiment preferably temperature be 30 ℃, add iron removing reagent, hydrogen peroxide and wool softener, the concentration that makes iron removing reagent is 0.2-0.5g/L, the concentration of hydrogen peroxide is 1-3g/L, the concentration of wool softener is 0.2-0.5g/L, preferably, the concentration that makes iron removing reagent is 0.3g/L, the concentration of hydrogen peroxide is 2g/L, the concentration of wool softener is 0.3g/L, obtain the 12 solution, stir the 12 solution 25-35 minute, in the present embodiment, preferably the time is 30 minutes, afterwards waste liquid is discharged.
From angle cost-saving and minimizing processing-waste pollution on the environment, consider, in specific embodiments of the invention, the waste liquid that in the process for tanning of sheep shorn velvet, tanning and retanning step produce has all carried out recycling.
Above the process for tanning of sheep shorn velvet provided by the present invention is described in detail.Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a process for tanning for sheep shorn velvet, is characterized in that, comprises the following steps:
11) degreasing adds water in paddle-tumble, then adds grease-removing agent, zymin and soda ash, and the pH value of adjusting the first solution is 7.3-7.8, obtains the first solution, and stirs the first solution;
12), to the fur after degreasing, carry out tanning with organic phosphine tanning agent;
13) residual organic phosphine tanning agent is removed in oxidation;
14) fur is carried out to retanning after completing oxidation;
15) to fur bleach, wet-milling, cleaning, dry and finishing technique.
2. the process for tanning of sheep shorn velvet according to claim 1, is characterized in that, in described step 11), in paddle-tumble, with the ratio of every sheepskin 20-40kg water, adds appropriate water; The concentration that adds rear grease-removing agent is 0.5-1.5g/L; The concentration of zymin is 1.5-3g/L; The concentration of soda ash is 0.4-0.6g/L; Stirring mode is stopped 40-20 minute for 20-40 minute for rotating, and corotation moves 2-4 hour.
3. the process for tanning of sheep shorn velvet according to claim 1, is characterized in that, described tanning specific implementation is:
21) in paddle-tumble, add water, regulate water temperature to 25-35 ℃, then add iron removing reagent and stir 4-6 minute;
22) to adding in the solution of iron removing reagent, add organic phosphine tanning agent, continue to stir 150-210 minute, then continue to be warming up to 30-40 ℃, obtain the second solution;
23) in the second solution, add soda ash, regulate the pH value of the second solution to 6.0-6.5.
4. the process for tanning of sheep shorn velvet according to claim 1, is characterized in that, described oxidation specific implementation is:
31) in paddle-tumble, add water, regulate water temperature to 40-50 ℃, add after iron removing reagent, grease-removing agent, obtain the 3rd solution, stir 4-6 minute;
32) in the 3rd solution, add Sodium hexametaphosphate 99 and stir 5-15 minute, obtain the 4th solution;
33) in the 4th solution, add hydrogen peroxide and stir 5-15 minute, obtain the 5th solution;
34) in the 5th solution, add soda ash, the pH value of regulator solution, to 8.5-9.0, obtains the 6th solution;
35) continue to stir the 6th solution, stirring mode is per half an hour of 8-12 minute, and corotation moves 1-3 hour, afterwards discharge opeing.
5. the process for tanning of sheep shorn velvet according to claim 1, is characterized in that, described retanning specific implementation is:
41) in paddle-tumble, add water, regulate water temperature to 35-45 ℃, after take a policy powder and DLE, obtain the 7th solution, stir 4-6 minute;
42) in the 7th solution, add sulfuric acid, obtain the 8th solution, stir 8-12 minute;
43) in the 8th solution, again add sulfuric acid, obtain the 9th solution, continue to stir the 9th solution 100-150 minute.
6. the process for tanning of sheep shorn velvet according to claim 1, is characterized in that, described bleaching specific implementation is:
51) in paddle-tumble, add water, regulate water temperature to 50-60 minute, add iron removing reagent and stir 4-6 minute, obtain the tenth solution;
52) in the tenth solution, add grease-removing agent and vat powder continuation stirring within 50-70 minute, to obtain the 11 solution;
53) in the 11 solution, add formic acid and stir 10-30 minute, again add afterwards formic acid, and continue to stir discharge opeing after 10-30 minute.
7. the process for tanning of sheep shorn velvet according to claim 1, is characterized in that, described cleaning is specifically embodied as:
In paddle-tumble, add water, regulate water temperature to 25-35 ℃, add iron removing reagent, hydrogen peroxide and wool softener, obtain the 12 solution, stir 25-35 minute, afterwards discharge opeing.
8. the process for tanning of sheep shorn velvet according to claim 1, is characterized in that, the zymin described in step 11) is proteolytic enzyme.
9. the process for tanning of sheep shorn velvet according to claim 2, is characterized in that step 22) described in organic phosphine tanning agent be Tetrakis hydroxymethyl phosphonium chloride or tetra methylol phosphoric sulfide.
10. the process for tanning of sheep shorn velvet according to claim 1, is characterized in that, described step 12) also comprises the recycling to tanning waste liquid; Described step 14) also comprises the recycling to retanning waste liquid.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016127951A1 (en) * | 2015-02-13 | 2016-08-18 | 天津市绿源天美科技有限公司 | Process and device for chlorine-free shrinkproof treatment of wool raw material and article thereof |
| CN114277202A (en) * | 2021-11-12 | 2022-04-05 | 宁夏西部皮草有限公司 | Production and processing technology of high-density shorn sheepskin |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225450B (en) * | 2008-01-21 | 2011-03-09 | 海宁上元皮革有限责任公司 | Chrome-free tannage producing technique for goat glove leather |
| CN101736097B (en) * | 2008-11-22 | 2012-12-05 | 际华三五一二皮革服装有限公司 | Method for manufacturing white tanned shearling |
| CN101760569B (en) * | 2008-12-25 | 2013-05-08 | 峰安皮业股份有限公司 | Leather making bio-pretreatment method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016127951A1 (en) * | 2015-02-13 | 2016-08-18 | 天津市绿源天美科技有限公司 | Process and device for chlorine-free shrinkproof treatment of wool raw material and article thereof |
| JP2018506661A (en) * | 2015-02-13 | 2018-03-08 | ティエンチン ルユアン ティアンメイ テクノロジー リミテッド | Chlorine-free shrink-proofing processes and equipment used for wool raw materials and products |
| CN114277202A (en) * | 2021-11-12 | 2022-04-05 | 宁夏西部皮草有限公司 | Production and processing technology of high-density shorn sheepskin |
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Effective date of registration: 20230824 Address after: No. 5, Mengzhou Industrial Cluster District, Jiaozuo City, Henan Province, 454750 Patentee after: Longfeng Gelemei Fashion Co.,Ltd. Address before: No. 5, West Industrial Zone, Mengzhou City, Jiaozuo City, Henan Province Patentee before: HENAN PROSPER SKINS & LEATHER ENTERPRISE Co.,Ltd. |