CN113621741A - Preparation process of waterproof leather - Google Patents
Preparation process of waterproof leather Download PDFInfo
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- CN113621741A CN113621741A CN202110950550.XA CN202110950550A CN113621741A CN 113621741 A CN113621741 A CN 113621741A CN 202110950550 A CN202110950550 A CN 202110950550A CN 113621741 A CN113621741 A CN 113621741A
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C11/00—Surface finishing of leather
- C14C11/003—Surface finishing of leather using macromolecular compounds
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Abstract
The invention relates to the technical field of waterproof leather, in particular to a preparation process of waterproof leather, which comprises the following steps: s1, weighing the double-layer leather blank as a raw material, putting the double-layer leather blank into a rotary drum, calculating the adding amount of other substances by taking 100 parts by mass of the double-layer leather blank, adding 150-180 parts by weight of water with the temperature of 25-35 ℃ and 0.3-0.6 part by weight of formic acid into the rotary drum, rotating for 60-90 min, and draining; s2, adding 150-180 parts by weight of 30-40 ℃ water and 0.5-2 parts by weight of an anti-twisting agent, and rotating for 5-10 min; 8-12 parts by weight of organic silicon modified polyurethane resin is added, the preparation process of the waterproof leather disclosed by the method is simple, the raw materials are safe and non-toxic, the prepared leather is soft and elastic, good in waterproofness, free of hardening and stickiness, and not greatly changed in performance after being washed for many times, and the waterproof leather has a good market prospect.
Description
Technical Field
The invention relates to the technical field of waterproof leather, in particular to a preparation process of waterproof leather.
Background
The collagen fiber of the leather contains a plurality of hydrophilic groups such as carboxyl, amino, hydroxyl, amido and the like, so that the leather has stronger affinity to water, which not only influences the mechanical property of the leather, but also influences the service performance and the applicability of the leather. People try to modify leather by hydrophobic substances such as grease, paraffin and the like for a long time, and a plurality of new waterproof modified materials emerge with the development of science and technology.
The existing waterproof leather is generally prepared by using metal chromium, which is easy to cause adverse effects on the environment, and the waterproof performance of the leather is general. Therefore, we propose a process for preparing waterproof leather to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a preparation process of waterproof leather.
A preparation process of waterproof leather comprises the following steps:
s1, weighing the double-layer leather blank as a raw material, putting the double-layer leather blank into a rotary drum, calculating the adding amount of other substances by taking 100 parts by mass of the double-layer leather blank, adding 150-180 parts by weight of water with the temperature of 25-35 ℃ and 0.3-0.6 part by weight of formic acid into the rotary drum, rotating for 60-90 min, and draining;
s2, adding 150-180 parts by weight of 30-40 ℃ water and 0.5-2 parts by weight of an anti-twisting agent, and rotating for 5-10 min; adding 8-12 parts by weight of organic silicon modified polyurethane resin, and rotating for 50-70 min; adding 5-8 parts by weight of reduced glutathione, 0.5-3 parts by weight of sodium alginate and 25-35 parts by weight of multi-metal complex tanning agent, turning for 8min, stopping for 42min, and repeating for 4-6 times; adding 0.5-2 parts by weight of an automatic alkali extracting agent, rotating for 140-160 min, and adjusting the pH value of the bath liquid to 3.8-4.2; adding 200-260 parts by weight of hot water twice, adjusting the temperature of the bath liquid to 45-48 ℃, rotating for 60-80 min, discharging liquid and discharging the liquid out of the drum;
s3, draining water, washing with 280-300 parts by weight of water at 25-35 ℃, and draining water;
s4, adding 80-120 parts by weight of 30-40 ℃ water and 1-3 parts by weight of a waterproof agent into the rotary drum, and rotating for 5-10 min;
s5, adding 2-4 parts by weight of acrylic resin tanning agent and 0.5-2 parts by weight of waterproof fatting agent into the rotary drum, and rotating for 120-150 min; adding 2-4 parts by weight of dye, continuously rotating for 90-120 min, then supplementing 80-100 parts by weight of water with the temperature of 45-55 ℃, and rotating for 10-15 min; then adding 0.5-1.5 parts by weight of formic acid in two times, rotating for 8-10 min after adding formic acid each time, and draining;
s6, adding 220-260 ℃ water at 40-60 ℃ and 0.1-0.3 part by weight of ammonia water with the mass concentration of 25-28%, rotating for 20-30 min, and then adding 2-3 parts by weight of grease and 2-4 parts by weight of waterproof fatting agent, and rotating for 60 min;
s7, adjusting the pH value to 4.5-5, rotating for 90-100 min, draining, standing for 12-24 h, and performing an after-finishing process to obtain the waterproof leather.
Preferably, the double-layer leather blank is a cattle double-layer leather blank.
Preferably, the multi-metal complex tanning agent is at least one of a zirconium-aluminum-titanium complex tanning agent, an iron-zirconium-aluminum complex tanning agent and a zirconium-aluminum-silicon complex tanning agent.
Preferably, the water repellent agent is at least one of a water repellent silicone polymer and a water repellent acrylic polymer.
Preferably, the waterproof fatliquor is at least one of a silicon-containing waterproof fatliquor, a synthetic waterproof fatliquor and a wax-containing waterproof fatliquor.
Preferably, the post-finishing process comprises the steps of setting up, standing, squeezing and stretching, vacuum drying, hanging and drying, and vibrating and softening, wherein the moisture of the crust leather after vacuum drying is controlled to be 15-18%, and the moisture of the crust leather after hanging and drying is controlled to be 8-12%.
The invention has the beneficial effects that: the preparation process of the waterproof leather disclosed by the invention is simple, the raw materials are safe and nontoxic, the prepared leather is soft and elastic, good in waterproofness, free from hardening and stickiness, and not greatly changed in performance after being washed for many times, so that the waterproof leather has a great market prospect.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
In example 1, a process for preparing waterproof leather includes the following steps:
s1, weighing the double-layer leather blank as a raw material, putting the double-layer leather blank into a rotary drum, calculating the adding amount of other substances by taking the double-layer leather blank as 100 parts by mass, adding 150 parts by weight of water with the temperature of 25 ℃ and 0.3 part by weight of formic acid into the rotary drum, rotating for 60min, and draining;
s2, adding 150 parts by weight of water with the temperature of 30 ℃ and 0.5 part by weight of anti-twisting agent, and rotating for 5 min; adding 8 parts by weight of organic silicon modified polyurethane resin, and rotating for 50 min; adding reduced glutathione 5 weight parts, sodium alginate 0.5 weight parts, and polymetallic complex tanning agent 25 weight parts, turning for 8min, stopping for 42min, and repeating for 4 times; adding 0.5 weight part of automatic alkali extracting agent, rotating for 140min, and adjusting the pH value of the bath liquid to 3.8; adding 200 parts by weight of hot water twice, adjusting the temperature of the bath lotion to 45 ℃, rotating for 60min, discharging liquid and taking out of the drum;
s3, after draining, washing with 280 parts by weight of 25 ℃ water, and draining;
s4, adding 80 parts by weight of water at 30 ℃ and 1 part by weight of waterproof agent into the rotary drum, and rotating for 5 min;
s5, adding 2 parts by weight of acrylic resin tanning agent and 0.5 part by weight of waterproof fatliquor into the rotary drum, and rotating for 120 min; adding 2 parts by weight of dye, continuously rotating for 90min, then supplementing 80 parts by weight of water with the temperature of 45 ℃, and rotating for 10 min; then adding 0.5 weight part of formic acid in two times, rotating for 8min after adding formic acid each time, and draining;
s6, adding 220 parts of water at 40 ℃ and 25% of ammonia water in 0.1 part by weight for 20min, and then adding 2 parts of grease and 2 parts of waterproof fatting agent by weight for 60 min;
and S7, adjusting the pH value to 4.5, rotating for 90min, draining, standing for 12h, and performing a post-finishing process to obtain the waterproof leather.
Further, the double-layer leather blank is a cattle double-layer leather blank.
Further, the multi-metal complex tanning agent is at least one of a zirconium-aluminum-titanium complex tanning agent, an iron-zirconium-aluminum complex tanning agent and a zirconium-aluminum-silicon complex tanning agent.
Further, the water repellent is at least one of a water-repellent silicone polymer and a water-repellent acrylic polymer.
Further, the waterproof fatliquor is at least one of a silicon-containing waterproof fatliquor, a synthetic waterproof fatliquor and a wax-containing waterproof fatliquor.
Further, the post-finishing process comprises the steps of setting up, standing, squeezing and stretching, vacuum drying, hanging and drying, and vibrating and softening, wherein the moisture of the crust leather after vacuum drying is controlled to be 15-18%, and the moisture of the crust leather after hanging and drying is controlled to be 8-12%.
In embodiment 2, a process for preparing waterproof leather includes the following steps:
s1, weighing the double-layer leather blank as a raw material, putting the double-layer leather blank into a rotary drum, calculating the adding amount of other substances by taking the double-layer leather blank as 100 parts by mass, adding 180 parts by weight of 35 ℃ water and 0.6 part by weight of formic acid into the rotary drum, rotating for 90min, and draining;
s2, adding 180 parts by weight of water with the temperature of 40 ℃ and 2 parts by weight of anti-twisting agent, and rotating for 10 min; adding 12 parts by weight of organic silicon modified polyurethane resin, and rotating for 70 min; adding 8 parts by weight of reduced glutathione, 3 parts by weight of sodium alginate and 35 parts by weight of multi-metal complex tanning agent, turning for 8min, stopping for 42min, and repeating for 6 times; adding 2 weight parts of automatic alkali extracting agent, rotating for 160min, and adjusting the pH value of the bath liquid to 4.2; adding 260 parts by weight of hot water twice, adjusting the temperature of the bath liquid to 48 ℃, rotating for 80min, discharging liquid and discharging the liquid out of the drum;
s3, draining, washing with 300 parts by weight of water at 35 ℃ and draining;
s4, adding 120 parts by weight of water at 40 ℃ and 3 parts by weight of waterproof agent into the rotary drum, and rotating for 10 min;
s5, adding 4 parts by weight of acrylic resin tanning agent and 2 parts by weight of waterproof fatliquor into the rotary drum, and rotating for 150 min; adding 4 parts by weight of dye, continuously rotating for 120min, then supplementing 100 parts by weight of water with the temperature of 45-55 ℃, and rotating for 15 min; then adding 1.5 parts by weight of formic acid in two times, rotating for 10min after adding the formic acid each time, and draining;
s6, adding 260 parts of water with the temperature of 60 ℃ and 0.3 part of ammonia water with the mass concentration of 28% for 30min, and then adding 3 parts of grease and 4 parts of waterproof fatliquor for 60 min;
and S7, adjusting the pH value to 5, rotating for 100min, draining water, standing for 24h, and performing a post-finishing process to obtain the waterproof leather.
Further, the double-layer leather blank is a cattle double-layer leather blank.
Further, the multi-metal complex tanning agent is at least one of a zirconium-aluminum-titanium complex tanning agent, an iron-zirconium-aluminum complex tanning agent and a zirconium-aluminum-silicon complex tanning agent.
Further, the water repellent is at least one of a water-repellent silicone polymer and a water-repellent acrylic polymer.
Further, the waterproof fatliquor is at least one of a silicon-containing waterproof fatliquor, a synthetic waterproof fatliquor and a wax-containing waterproof fatliquor.
Further, the post-finishing process comprises the steps of setting up, standing, squeezing and stretching, vacuum drying, hanging and drying, and vibrating and softening, wherein the moisture of the crust leather after vacuum drying is controlled to be 15-18%, and the moisture of the crust leather after hanging and drying is controlled to be 8-12%.
In example 3, a process for preparing waterproof leather includes the following steps:
s1, weighing the double-layer leather blank serving as a raw material, putting the double-layer leather blank into a rotary drum, calculating the adding amount of other substances by taking 100 parts by mass of the double-layer leather blank, adding 160 parts by weight of water with the temperature of 30 ℃ and 0.5 part by weight of formic acid into the rotary drum, rotating for 70min, and draining;
s2, adding 170 parts by weight of 35 ℃ water and 1 part by weight of anti-twisting agent, and rotating for 6 min; adding 10 parts by weight of organic silicon modified polyurethane resin, and rotating for 60 min; adding 7 parts by weight of reduced glutathione, 2 parts by weight of sodium alginate and 30 parts by weight of multi-metal complex tanning agent, turning for 8min, stopping for 42min, and repeating for 5 times; adding 1 weight part of automatic alkali extracting agent, rotating for 150min, and adjusting the pH value of the bath liquid to 4; adding 230 weight parts of hot water twice, adjusting the temperature of the bath liquid to 46 ℃, rotating for 70min, discharging liquid and discharging the liquid;
s3, draining, washing with 290 parts by weight of water at 30 ℃, and draining;
s4, adding 100 parts by weight of 35 ℃ water and 2 parts by weight of waterproof agent into the rotary drum, and rotating for 7 min;
s5, adding 3 parts by weight of acrylic resin tanning agent and 1 part by weight of waterproof fatliquor into the rotary drum, and rotating for 130 min; adding 3 parts by weight of dye, continuously rotating for 100min, then supplementing 90 parts by weight of water with the temperature of 50 ℃, and rotating for 12 min; then adding 1 part by weight of formic acid in two times, rotating for 9min after adding the formic acid each time, and draining;
s6, adding 230 ℃ water with the temperature of 50 ℃ and 0.2 part by weight of ammonia water with the mass concentration of 27% for 25min, and then adding 2.5 parts by weight of grease and 3 parts by weight of waterproof fatliquor for 60 min;
and S7, adjusting the pH value to 5, rotating for 95min, draining water, standing for 18h, and performing a post-finishing process to obtain the waterproof leather.
Further, the double-layer leather blank is a cattle double-layer leather blank.
Further, the multi-metal complex tanning agent is at least one of a zirconium-aluminum-titanium complex tanning agent, an iron-zirconium-aluminum complex tanning agent and a zirconium-aluminum-silicon complex tanning agent.
Further, the water repellent is at least one of a water-repellent silicone polymer and a water-repellent acrylic polymer.
Further, the waterproof fatliquor is at least one of a silicon-containing waterproof fatliquor, a synthetic waterproof fatliquor and a wax-containing waterproof fatliquor.
Further, the post-finishing process comprises the steps of setting up, standing, squeezing and stretching, vacuum drying, hanging and drying, and vibrating and softening, wherein the moisture of the crust leather after vacuum drying is controlled to be 15-18%, and the moisture of the crust leather after hanging and drying is controlled to be 8-12%.
In examples 1 to 3, the process for preparing waterproof leather disclosed by the present invention is simple, the raw materials are safe and non-toxic, the prepared leather is soft and elastic, has good waterproof property, is not hardened and sticky, has little change in properties after being washed for many times, and is waterproof leather with great market prospect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The preparation process of the waterproof leather is characterized by comprising the following steps:
s1, weighing the double-layer leather blank as a raw material, putting the double-layer leather blank into a rotary drum, calculating the adding amount of other substances by taking 100 parts by mass of the double-layer leather blank, adding 150-180 parts by weight of water with the temperature of 25-35 ℃ and 0.3-0.6 part by weight of formic acid into the rotary drum, rotating for 60-90 min, and draining;
s2, adding 150-180 parts by weight of 30-40 ℃ water and 0.5-2 parts by weight of an anti-twisting agent, and rotating for 5-10 min; adding 8-12 parts by weight of organic silicon modified polyurethane resin, and rotating for 50-70 min; adding 5-8 parts by weight of reduced glutathione, 0.5-3 parts by weight of sodium alginate and 25-35 parts by weight of multi-metal complex tanning agent, turning for 8min, stopping for 42min, and repeating for 4-6 times; adding 0.5-2 parts by weight of an automatic alkali extracting agent, rotating for 140-160 min, and adjusting the pH value of the bath liquid to 3.8-4.2; adding 200-260 parts by weight of hot water twice, adjusting the temperature of the bath liquid to 45-48 ℃, rotating for 60-80 min, discharging liquid and discharging the liquid out of the drum;
s3, draining water, washing with 280-300 parts by weight of water at 25-35 ℃, and draining water;
s4, adding 80-120 parts by weight of 30-40 ℃ water and 1-3 parts by weight of a waterproof agent into the rotary drum, and rotating for 5-10 min;
s5, adding 2-4 parts by weight of acrylic resin tanning agent and 0.5-2 parts by weight of waterproof fatting agent into the rotary drum, and rotating for 120-150 min; adding 2-4 parts by weight of dye, continuously rotating for 90-120 min, then supplementing 80-100 parts by weight of water with the temperature of 45-55 ℃, and rotating for 10-15 min; then adding 0.5-1.5 parts by weight of formic acid in two times, rotating for 8-10 min after adding formic acid each time, and draining;
s6, adding 220-260 ℃ water at 40-60 ℃ and 0.1-0.3 part by weight of ammonia water with the mass concentration of 25-28%, rotating for 20-30 min, and then adding 2-3 parts by weight of grease and 2-4 parts by weight of waterproof fatting agent, and rotating for 60 min;
s7, adjusting the pH value to 4.5-5, rotating for 90-100 min, draining, standing for 12-24 h, and performing an after-finishing process to obtain the waterproof leather.
2. The process for preparing waterproof leather according to claim 1, wherein the double-layered leather blank is a cow double-layered leather blank.
3. The process for preparing waterproof leather according to claim 1, wherein the multi-metal complex tanning agent is at least one of a zirconium-aluminum-titanium complex tanning agent, an iron-zirconium-aluminum complex tanning agent and a zirconium-aluminum-silicon complex tanning agent.
4. The process for preparing waterproof leather according to claim 1, wherein the waterproof agent is at least one of waterproof silicone polymer and waterproof acrylic polymer.
5. The process of claim 1, wherein the waterproof fatliquor is at least one of a silicon-containing waterproof fatliquor, a synthetic waterproof fatliquor, and a wax-containing waterproof fatliquor.
6. The process for preparing waterproof leather according to claim 1, wherein the post-finishing process comprises the steps of setting aside, squeezing and stretching, vacuum drying, hanging and drying, and vibrating and softening.
7. The preparation process of the waterproof leather according to claim 6, wherein the moisture of the vacuum-dried crust leather is controlled to be 15-18%, and the moisture of the hanging-dried crust leather is controlled to be 8-12%.
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| CN202110950550.XA CN113621741A (en) | 2021-08-18 | 2021-08-18 | Preparation process of waterproof leather |
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| CN202110950550.XA CN113621741A (en) | 2021-08-18 | 2021-08-18 | Preparation process of waterproof leather |
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| CN113621741A true CN113621741A (en) | 2021-11-09 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105919180A (en) * | 2016-07-01 | 2016-09-07 | 桐乡市雄鹰皮草有限公司 | Processing process of bright soft and smooth mink skin thermal coat |
| CN105925733A (en) * | 2016-07-01 | 2016-09-07 | 桐乡市雄鹰皮草有限公司 | Tanning and dyeing technique of mink skin with functions as fur and leather |
| CN109628654A (en) * | 2018-12-17 | 2019-04-16 | 兴业皮革科技股份有限公司 | A kind of manufacture craft that water proof type is removed from office without chromed tanned leather |
-
2021
- 2021-08-18 CN CN202110950550.XA patent/CN113621741A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105919180A (en) * | 2016-07-01 | 2016-09-07 | 桐乡市雄鹰皮草有限公司 | Processing process of bright soft and smooth mink skin thermal coat |
| CN105925733A (en) * | 2016-07-01 | 2016-09-07 | 桐乡市雄鹰皮草有限公司 | Tanning and dyeing technique of mink skin with functions as fur and leather |
| CN109628654A (en) * | 2018-12-17 | 2019-04-16 | 兴业皮革科技股份有限公司 | A kind of manufacture craft that water proof type is removed from office without chromed tanned leather |
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Application publication date: 20211109 |
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