CN114292968A - Soft and comfortable leather material and preparation method thereof - Google Patents
Soft and comfortable leather material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a soft comfortable leather material and a preparation method thereof, wherein the preparation method comprises the following steps: degreasing, degreasing and unhairing the leather; putting the leather into a rotary drum, rotating the rotary drum, adding a softening agent, rotating, adjusting the pH value with formic acid, discharging liquid and washing with water; putting the leather into warm water, adding an acrylic resin tanning agent, rotating, then adding, rotating, adding formic acid to adjust the pH value, rotating, discharging liquid and washing with water; squeezing and stretching the leather, and then putting the leather into a vacuum drying oven for vacuum drying; uniformly spraying composite antibacterial liquid on two sides of the dried leather, naturally airing, spraying the composite antibacterial liquid again, and drying to obtain the antibacterial leather; and dyeing, greasing and finishing the antibacterial leather. The soft comfortable leather material is treated by the softening agent, the softness of the leather material and the dispersibility of fibers can be improved by combining the softening agent I with the softening agent II, the damage of the softening agent to the leather material is small, and the leather material is good in quality.
Description
Technical Field
The invention relates to the technical field of leather processing, in particular to a soft and comfortable leather material and a preparation method thereof.
Background
The leather is animal skin which is obtained by physical and chemical processing such as unhairing, tanning and the like and is denatured and non-perishable. Leather products are mostly found in the fields of leather shoes, leather clothes, leather bags, leather sofas and the like. The traditional leather shoes have the characteristics of stiffness, heaviness, poor elasticity and the like, and the phenomena of foot stuffiness, foot abrasion and the like are particularly easy to occur due to the fact that the shoes need to be worn for a long time, particularly in hot summer. Although the animal leather has better air permeability compared with the artificial leather, the animal leather can breed bacteria due to sultriness after being worn for a long time, and causes harm to human health.
Chinese patent 201810475833.1 discloses a soft leather filler and a preparation method thereof, wherein the soft leather filler comprises the following raw materials in parts by weight: 20-50 parts of acrylic resin emulsion, 15-40 parts of polyurethane resin emulsion, 15-30 parts of modified epoxidized soybean oil, 2-8 parts of penetrating agent, 1-5 parts of antibacterial agent, 0.1-1 part of metal salt, 1-5 parts of aspartic acid, 1-5 parts of limonene and 15-50 parts of water. The patent uses the soft leather filler to enable the soft leather filler to quickly permeate into the leather, so that the softness, toughness and antibacterial and mildewproof performance of the leather are improved, but the softness of the leather prepared by the method is poor.
Disclosure of Invention
In view of the above, the present invention provides a soft and comfortable leather material and a preparation method thereof, so as to solve the above technical problems.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a soft and comfortable leather material comprises the following steps:
step S10, performing deoiling, degreasing and unhairing treatment on the leather to obtain a pretreated leather;
step S20, putting 100 parts of pretreated leather into a rotary drum with a liquid ratio of 1.2-1.5, controlling the temperature to be 40-45 ℃ and the pH value to be 5-5.5, rotating the rotary drum, adding 8-12 parts of a softening agent I, rotating the rotary drum for 3-4.5 hours, adding 1.2-7.5 parts of a softening agent II, rotating for 1-1.5 hours, adjusting the pH value to be 4-4.5 with formic acid, draining liquid, washing with water to obtain soft treated leather;
step S30, placing the soft leather into 110-125 parts of warm water at 40-50 ℃, adding 1.5 parts of acrylic resin tanning agent, rotating for 30-50 minutes, then adding 1.5-2.2 parts of modified protein and 0.5-1.8 parts of quebracho tannin extract, rotating for 20-40 minutes, adding formic acid to adjust the pH value between 4.2-4.5, rotating for 30 minutes, draining liquid and washing with water;
step S40, squeezing and stretching the leather obtained in the step S30, and then placing the leather into a vacuum drying oven for vacuum drying to obtain dry leather;
step S50, uniformly spraying composite antibacterial liquid on two sides of the dried leather, naturally airing for 15-24 hours at the temperature of 20-25 ℃, spraying the composite antibacterial liquid again, and drying at the temperature of 35-42 ℃ to obtain the antibacterial leather;
and step S60, dyeing, greasing and post-finishing the antibacterial leather material to obtain the soft and comfortable leather material.
Further, in step S10, the leather is selected from any one of sheepskin, cowhide, pigskin, and horse skin.
Further, in step S20, the softening agent I is an acidic protease, bentonite, sodium oxalate, and fatty acid polyoxyethylene ester in a weight ratio of 10: 2-8: 0.5-1.2: 0.2 to 0.8, respectively. The fatty acid polyoxyethylene ester is a penetrating agent, the bentonite provides a carrier for the acid protease, and the enzymatic agent adsorbs enzymolysis products when the enzymatic agent plays a role, and the sodium oxalate can improve the adsorption effect of the bentonite.
Further, in step S20, the softening agent I is an acidic protease, bentonite, sodium oxalate, and polyoxyethylene fatty acid ester in a weight ratio of 10: 5: 0.8: 0.5, mixing.
Further, in step S40, in step S20, the softener II is prepared by mixing amino silicone oil, tea polyphenol and hydroxymethyl cellulose in a weight ratio of 10: 1.2-2.2: 0.4-0.8. The treatment by the softening agent I and the treatment by the softening agent II can improve the softness of the leather and the dispersibility of the fibers, and the softening agent has little damage to the leather and good leather quality.
Further, in step S40, the vacuum drying process includes: drying for 50-65 seconds at 50-62 ℃, then cooling to 32-38 ℃, and continuously drying until the water content is 24-28%.
Further, in step S50, the method for preparing the composite antibacterial liquid includes: preparing 20ml of silver nitrate solution with the concentration of 0.12-0.15 mol/L, adding 50ml of sodium borohydride with the concentration of 0.07-0.10 mol/L, dropwise adding 0.3-0.6 g of sodium citrate, and stirring and mixing for 2.5-3.5 hours to obtain the silver ion antibacterial agent; adding 1g of chitosan into 100ml of deionized water, stirring and mixing, and then adding 40ml to 60ml of 10% acetic acid solution to obtain acetic acid solution of chitosan; mixing the silver ion antibacterial agent with acetic acid solution of chitosan, adding 1.5-5 ml of epoxy chloropropane, uniformly stirring, and carrying out ultrasonic oscillation for 5 minutes to obtain the composite antibacterial liquid.
Furthermore, the addition amount of the silver ion antibacterial agent is 0.6-1.2 times of the weight of the chitosan.
Further, in step S50, the amount of the composite antibacterial liquid sprayed is 25 to 32ml/dm each time3。
Another object of the present invention is to provide a method for preparing a soft and comfortable dermal material, comprising the steps of:
the technical scheme can show that the invention has the advantages that:
1. the soft comfortable leather material is treated by the softening agent I and then treated by the softening agent II, the softness of the leather material and the dispersibility of fibers can be improved by combining the softening agent I and the softening agent II, the damage of the softening agent to the leather material is small, and the leather material quality is good;
2. according to the soft and comfortable leather material, the acrylic resin tanning agent, the quebracho tannin extract and the modified protein are used for processing and extending into the leather material, so that the anti-aging performance of the leather material is improved, the moisture on the surface of the leather material is quickly evaporated through vacuum drying processing, the uniformity of the leather material is improved, and then the mesh structure and the fiber strength in the leather material are improved through low-temperature drying processing;
3. the soft and comfortable leather material prepared by the invention is plump and soft, has comfortable hand feeling and wearing feeling, excellent antibacterial effect, long antibacterial aging, simple preparation method, easy operation of preparation process and high economic benefit, and is suitable for industrial production.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below.
Detailed Description
The following detailed description of embodiments of the invention, but the invention can be practiced in many different ways, as defined and covered by the claims.
Example 1
Soft and comfortable leather material and preparation method thereof
The preparation method of the soft comfortable leather material comprises the following steps:
step S10, performing deoiling, degreasing and unhairing treatment on the leather to obtain a pretreated leather; the skin material is selected from sheepskin;
step S20, putting 100 parts of pretreated leather into a rotary drum with a liquid ratio of 1.2, controlling the temperature to be 40 ℃ and the pH value to be between 5 and 5.5, rotating the rotary drum, adding 8 parts of a softening agent I, rotating the rotary drum for 3 hours, adding 1.2 parts of a softening agent II, rotating for 1 hour, adjusting the pH value to be 4 to 4.5 by formic acid, discharging liquid, and washing by water to obtain the soft treated leather; the softening agent I is prepared from acidic protease, bentonite, sodium oxalate and fatty acid polyoxyethylene ester according to a weight ratio of 10: 2: 0.5: 0.2, mixing; the softening agent II is prepared by mixing amino silicone oil, tea polyphenol and hydroxymethyl cellulose in a weight ratio of 10:1.2: 0.4;
step S30, placing the soft leather into 110 parts of warm water at 40 ℃, adding 1.5 parts of acrylic resin tanning agent, rotating for 30 minutes, adding 1.5 parts of modified protein and 0.5 part of quebracho extract, rotating for 20 minutes, adding formic acid to adjust the pH value to be between 4.2 and 4.5, rotating for 30 minutes, draining liquid and washing with water;
step S40, squeezing and stretching the leather obtained in the step S30, and then placing the leather into a vacuum drying oven for vacuum drying to obtain dry leather; the vacuum drying process comprises the following steps: drying at 50 deg.C for 50 s, cooling to 32 deg.C, and oven drying until water content is 24%;
step S50, uniformly spraying composite antibacterial liquid on two sides of the dried leather, naturally airing for 15 hours at the temperature of 20 ℃, spraying the composite antibacterial liquid again, and drying at the temperature of 35 ℃ to obtain the antibacterial leather; the preparation method of the composite antibacterial liquid comprises the following steps: preparing 20ml of silver nitrate solution with the concentration of 0.12mol/L, adding 50ml of sodium borohydride with the concentration of 0.07mol/L, dropwise adding 0.3g of sodium citrate, and stirring and mixing for 2.5 hours to obtain the silver ion antibacterial agent; adding 1g of chitosan into 100ml of deionized water, stirring and mixing, and adding 40ml of 10% acetic acid solution to obtain acetic acid solution of chitosan; mixing a silver ion antibacterial agent with an acetic acid solution of chitosan, adding 1.5ml of epoxy chloropropane, uniformly stirring, and carrying out ultrasonic oscillation for 5 minutes to obtain a composite antibacterial liquid; the addition amount of the silver ion antibacterial agent is 0.6 times of the weight of the chitosan; the spraying amount of the composite antibacterial liquid is 25ml/dm each time3；
And step S60, dyeing, greasing and post-finishing the antibacterial leather material to obtain the soft and comfortable leather material.
Example 2
Soft and comfortable leather material and preparation method thereof
The preparation method of the soft comfortable leather material comprises the following steps:
step S10, performing deoiling, degreasing and unhairing treatment on the leather to obtain a pretreated leather; the leather is selected from cow leather;
step S20, putting 100 parts of pretreated leather into a rotary drum with a liquid ratio of 1.5, controlling the temperature at 45 ℃ and the pH value between 5 and 5.5, rotating the rotary drum, adding 12 parts of a softening agent I, rotating the rotary drum for 4.5 hours, adding 7.5 parts of a softening agent II, rotating for 1.5 hours, adjusting the pH value to 4 to 4.5 by formic acid, draining liquid, washing with water to obtain soft treated leather; the softening agent I is prepared from acidic protease, bentonite, sodium oxalate and fatty acid polyoxyethylene ester according to a weight ratio of 10: 8: 1.2: 0.8, mixing; the softening agent II is prepared by mixing amino silicone oil, tea polyphenol and hydroxymethyl cellulose in a weight ratio of 10:2.2: 0.8;
step S30, placing the soft leather into 125 parts of warm water at 50 ℃, adding 1.5 parts of acrylic resin tanning agent, rotating for 50 minutes, adding 2.2 parts of modified protein and 1.8 parts of quebracho extract, rotating for 40 minutes, adding formic acid to adjust the pH value to be between 4.2 and 4.5, rotating for 30 minutes, draining liquid and washing with water;
step S40, squeezing and stretching the leather obtained in the step S30, and then placing the leather into a vacuum drying oven for vacuum drying to obtain dry leather; the vacuum drying process comprises the following steps: drying at 62 deg.C for 65 s, cooling to 38 deg.C, and oven drying until the water content is 28%;
step S50, uniformly spraying composite antibacterial liquid on two sides of the dried leather, naturally airing for 24 hours at 25 ℃, spraying the composite antibacterial liquid again, and drying at 42 ℃ to obtain the antibacterial leather; the preparation method of the composite antibacterial liquid comprises the following steps: preparing 20ml of silver nitrate solution with the concentration of 0.15mol/L, adding 50ml of sodium borohydride with the concentration of 0.10mol/L, dropwise adding 0.6g of sodium citrate, and stirring and mixing for 3.5 hours to obtain the silver ion antibacterial agent; adding 1g of chitosan into 100ml of deionized water, stirring and mixing, and adding 60ml of 10% acetic acid solution to obtain acetic acid solution of chitosan; mixing a silver ion antibacterial agent with an acetic acid solution of chitosan, adding 5ml of epoxy chloropropane, uniformly stirring, and carrying out ultrasonic oscillation for 5 minutes to obtain a composite antibacterial liquid; the addition amount of the silver ion antibacterial agent is 1.2 times of the weight of the chitosan; the spraying amount of the composite antibacterial liquid is 32ml/dm each time3；
And step S60, dyeing, greasing and post-finishing the antibacterial leather material to obtain the soft and comfortable leather material.
Example 3
Soft and comfortable leather material and preparation method thereof
The preparation method of the soft comfortable leather material comprises the following steps:
step S10, performing deoiling, degreasing and unhairing treatment on the leather to obtain a pretreated leather; the skin material is selected from Corii Sus Domestica;
step S20, putting 100 parts of pretreated leather into a rotary drum with a liquid ratio of 1.3, controlling the temperature to be 44 ℃ and the pH value to be between 5.2 and 5.5, rotating the rotary drum, adding 11 parts of a softening agent I, rotating the rotary drum for 3.5 hours, adding 2.5 parts of a softening agent II, rotating for 1 hour, adjusting the pH value to be 4.2 to 4.5 by formic acid, draining liquid, and washing by water to obtain soft treated leather; the softening agent I is prepared from acidic protease, bentonite, sodium oxalate and fatty acid polyoxyethylene ester according to a weight ratio of 10: 3: 1.0: 0.4, mixing; the softening agent II is prepared by mixing amino silicone oil, tea polyphenol and hydroxymethyl cellulose in a weight ratio of 10:1.4: 0.6;
step S30, putting the soft leather into 115 parts of warm water at 42 ℃, adding 1.5 parts of acrylic resin tanning agent, rotating for 35 minutes, adding 1.7 parts of modified protein and 0.7 part of quebracho extract, rotating for 25 minutes, adding formic acid to adjust the pH value to be between 4.2 and 4.5, rotating for 30 minutes, draining liquid and washing with water;
step S40, squeezing and stretching the leather obtained in the step S30, and then placing the leather into a vacuum drying oven for vacuum drying to obtain dry leather; the vacuum drying process comprises the following steps: drying at 52 deg.C for 60 s, cooling to 33 deg.C, and oven drying until the water content is 25%;
step S50, uniformly spraying composite antibacterial liquid on two sides of the dried leather, naturally airing for 17 hours at 22 ℃, spraying the composite antibacterial liquid again, and drying at 40 ℃ to obtain the antibacterial leather; the preparation method of the composite antibacterial liquid comprises the following steps: preparing 20ml of silver nitrate solution with the concentration of 0.13mol/L, adding 50ml of sodium borohydride with the concentration of 0.08mol/L, dropwise adding 0.4g of sodium citrate, and stirring and mixing for 3 hours to obtain the silver ion antibacterial agent; adding 1g of chitosan into 100ml of deionized water, stirring and mixing, and adding 45ml of 10% acetic acid solution to obtain acetic acid solution of chitosan; mixing a silver ion antibacterial agent with an acetic acid solution of chitosan, adding 2.0ml of epoxy chloropropane, uniformly stirring, and carrying out ultrasonic oscillation for 5 minutes to obtain a composite antibacterial liquid; the addition amount of the silver ion antibacterial agent is 0.5 time of the weight of the chitosan; the spraying amount of the composite antibacterial liquid is 30ml/dm each time3；
And step S60, dyeing, greasing and post-finishing the antibacterial leather material to obtain the soft and comfortable leather material.
Example 4
Soft and comfortable leather material and preparation method thereof
The preparation method of the soft comfortable leather material comprises the following steps:
step S10, performing deoiling, degreasing and unhairing treatment on the leather to obtain a pretreated leather; the leather material is selected from horse leather;
step S20, putting 100 parts of pretreated leather into a rotary drum with a liquid ratio of 1.3, controlling the temperature at 43 ℃ and the pH value between 5 and 5.5, rotating the rotary drum, adding 10 parts of a softening agent I, rotating the rotary drum for 4.0 hours, adding 4.2 parts of a softening agent II, rotating for 1.5 hours, adjusting the pH value to 4 to 4.5 by formic acid, draining liquid, washing with water to obtain soft treated leather; the softening agent I is prepared from acidic protease, bentonite, sodium oxalate and fatty acid polyoxyethylene ester according to a weight ratio of 10: 5: 0.8: 0.5, mixing; the softening agent II is prepared by mixing amino silicone oil, tea polyphenol and hydroxymethyl cellulose in a weight ratio of 10:1.7: 0.6;
step S30, placing the soft leather into 120 parts of warm water at 45 ℃, adding 1.5 parts of acrylic resin tanning agent, rotating for 40 minutes, adding 1.8 parts of modified protein and 1.2 parts of quebracho extract, rotating for 30 minutes, adding formic acid to adjust the pH value to be 4.2-4.5, rotating for 30 minutes, draining liquid and washing with water;
step S40, squeezing and stretching the leather obtained in the step S30, and then placing the leather into a vacuum drying oven for vacuum drying to obtain dry leather; the vacuum drying process comprises the following steps: drying at 56 deg.C for 58 s, cooling to 35 deg.C, and oven drying until the water content is 26%;
step S50, uniformly spraying composite antibacterial liquid on two sides of the dried leather, naturally airing for 20 hours at 23 ℃, spraying the composite antibacterial liquid again, and drying at 38 ℃ to obtain the antibacterial leather; the preparation method of the composite antibacterial liquid comprises the following steps: preparing 20ml of silver nitrate solution with the concentration of 0.13mol/L, adding 50ml of sodium borohydride with the concentration of 0.08mol/L, dropwise adding 0.45g of sodium citrate, and stirring and mixing for 3.0 hours to obtain the silver ion antibacterial agent; adding 1g of chitosan into 100ml of deionized water, stirring and mixing, and adding 50ml of 10% acetic acid solution to obtain acetic acid solution of chitosan; mixing silver ion antibacterial agent with acetic acid solution of chitosan, and addingAdding 3.0ml of epoxy chloropropane, uniformly stirring, and carrying out ultrasonic oscillation for 5 minutes to obtain a composite antibacterial liquid; the addition amount of the silver ion antibacterial agent is 0.9 times of the weight of the chitosan; the spraying amount of the composite antibacterial liquid is 28ml/dm each time3；
And step S60, dyeing, greasing and post-finishing the antibacterial leather material to obtain the soft and comfortable leather material.
Comparative example 1
Soft and comfortable leather material and preparation method thereof
The preparation method of the soft comfortable leather material comprises the following steps:
step S10, performing deoiling, degreasing and unhairing treatment on the leather to obtain a pretreated leather; the leather material is selected from horse leather;
step S20, putting 100 parts of pretreated leather into 120 parts of warm water at 45 ℃, adding 1.5 parts of acrylic resin tanning agent, rotating for 40 minutes, then adding 1.8 parts of modified protein and 1.2 parts of quebracho extract, rotating for 30 minutes, adding formic acid to adjust the pH value to be 4.2-4.5, rotating for 30 minutes, draining liquid and washing with water;
step S30, squeezing and stretching the leather obtained in the step S20, and then placing the leather into a vacuum drying oven for vacuum drying to obtain dry leather; the vacuum drying process comprises the following steps: drying at 56 deg.C for 58 s, cooling to 35 deg.C, and oven drying until the water content is 26%;
step S40, uniformly spraying composite antibacterial liquid on two sides of the dried leather, naturally airing for 20 hours at 23 ℃, spraying the composite antibacterial liquid again, and drying at 38 ℃ to obtain the antibacterial leather; the preparation method of the composite antibacterial liquid comprises the following steps: preparing 20ml of silver nitrate solution with the concentration of 0.13mol/L, adding 50ml of sodium borohydride with the concentration of 0.08mol/L, dropwise adding 0.45g of sodium citrate, and stirring and mixing for 3.0 hours to obtain the silver ion antibacterial agent; adding 1g of chitosan into 100ml of deionized water, stirring and mixing, and adding 50ml of 10% acetic acid solution to obtain acetic acid solution of chitosan; mixing a silver ion antibacterial agent with an acetic acid solution of chitosan, adding 3.0ml of epoxy chloropropane, uniformly stirring, and carrying out ultrasonic oscillation for 5 minutes to obtain a composite antibacterial liquid;the addition amount of the silver ion antibacterial agent is 0.9 times of the weight of the chitosan; the spraying amount of the composite antibacterial liquid is 28ml/dm each time3；
And step S50, dyeing, greasing and post-finishing the antibacterial leather material to obtain the soft and comfortable leather material.
Comparative example 2
Soft and comfortable leather material and preparation method thereof
The preparation method of the soft comfortable leather material comprises the following steps:
step S10, performing deoiling, degreasing and unhairing treatment on the leather to obtain a pretreated leather; the leather material is selected from horse leather;
step S20, putting 100 parts of pretreated leather into a rotary drum with a liquid ratio of 1.3, controlling the temperature at 43 ℃ and the pH value between 5 and 5.5, rotating the rotary drum, adding 10 parts of a softening agent I, rotating the rotary drum for 4.0 hours, adding 4.2 parts of a softening agent II, rotating for 1.5 hours, adjusting the pH value to 4 to 4.5 by formic acid, draining liquid, washing with water to obtain soft treated leather; the softening agent I is prepared from acidic protease, bentonite, sodium oxalate and fatty acid polyoxyethylene ester according to a weight ratio of 10: 5: 0.8: 0.5, mixing; the softening agent II is prepared by mixing amino silicone oil, tea polyphenol and hydroxymethyl cellulose in a weight ratio of 10:1.7: 0.6;
step S30, placing the soft leather into 120 parts of warm water at 45 ℃, adding 1.5 parts of acrylic resin tanning agent, rotating for 40 minutes, adding 1.8 parts of modified protein and 1.2 parts of quebracho extract, rotating for 30 minutes, adding formic acid to adjust the pH value to be 4.2-4.5, rotating for 30 minutes, draining liquid and washing with water;
step S40, squeezing and stretching the leather obtained in the step S30, and then placing the leather into a vacuum drying oven for vacuum drying to obtain dry leather; the vacuum drying process comprises the following steps: drying at 56 deg.C for 58 s, cooling to 35 deg.C, and oven drying until the water content is 26%;
step S50, uniformly spraying antibacterial liquid on two sides of the dried leather, naturally airing for 20 hours at 23 ℃, spraying the composite antibacterial liquid again, and drying at 38 ℃ to obtain the antibacterial leather; the antibacterial liquid is in the market with the concentration of 2.0mg/LSelling silver ion antibacterial agents; the spraying amount of the antibacterial liquid is 28ml/dm each time3；
And step S60, dyeing, greasing and post-finishing the antibacterial leather material to obtain the soft and comfortable leather material.
Examples of the experiments
To further illustrate the technological advancement of the present invention, experiments are now taken to further illustrate it.
The experimental method comprises the following steps: the soft and comfortable leather material prepared by the invention is subjected to performance test, and the result is shown in table 1. The sensory score includes two items of fullness and softness, wherein the fullness score is 10 points, the worst score is 5 points, each item calculates an average value, and the total score is 20 points.
TABLE 1
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the soft and comfortable leather material is characterized by comprising the following steps:
step S10, performing deoiling, degreasing and unhairing treatment on the leather to obtain a pretreated leather;
step S20, putting 100 parts of pretreated leather into a rotary drum with a liquid ratio of 1.2-1.5, controlling the temperature to be 40-45 ℃ and the pH value to be 5-5.5, rotating the rotary drum, adding 8-12 parts of a softening agent I, rotating the rotary drum for 3-4.5 hours, adding 1.2-7.5 parts of a softening agent II, rotating for 1-1.5 hours, adjusting the pH value to be 4-4.5 with formic acid, draining liquid, washing with water to obtain soft treated leather;
step S30, placing the soft leather into 110-125 parts of warm water at 40-50 ℃, adding 1.5 parts of acrylic resin tanning agent, rotating for 30-50 minutes, then adding 1.5-2.2 parts of modified protein and 0.5-1.8 parts of quebracho tannin extract, rotating for 20-40 minutes, adding formic acid to adjust the pH value between 4.2-4.5, rotating for 30 minutes, draining liquid and washing with water;
step S40, squeezing and stretching the leather obtained in the step S30, and then placing the leather into a vacuum drying oven for vacuum drying to obtain dry leather;
step S50, uniformly spraying composite antibacterial liquid on two sides of the dried leather, naturally airing for 15-24 hours at the temperature of 20-25 ℃, spraying the composite antibacterial liquid again, and drying at the temperature of 35-42 ℃ to obtain the antibacterial leather;
and step S60, dyeing, greasing and post-finishing the antibacterial leather material to obtain the soft and comfortable leather material.
2. The method for preparing a soft and comfortable dermal material of claim 1, wherein in step S10, the skin material is selected from any one of sheepskin, cowhide, pigskin, and horse skin.
3. The method for preparing a soft and comfortable dermal material according to claim 1, wherein in step S20, the softening agent I is an acidic protease, bentonite, sodium oxalate, fatty acid polyoxyethylene ester in a weight ratio of 10: 2-8: 0.5-1.2: 0.2 to 0.8, respectively.
4. The method for preparing a soft and comfortable dermal material according to claim 1, wherein in step S20, the softening agent I is acid protease, bentonite, sodium oxalate, fatty acid polyoxyethylene ester in a weight ratio of 10: 5: 0.8: 0.5, mixing.
5. The method for preparing a soft and comfortable dermal material according to claim 1, wherein in step S40, in step S20, the softener II is a mixture of amino silicone oil, tea polyphenol and hydroxymethyl cellulose in a weight ratio of 10:1.2 to 2.2:0.4 to 0.8.
6. The method for preparing a soft and comfortable dermal material of claim 1, wherein in step S40, the vacuum drying process comprises: drying at 50-62 deg.c for 50-65 sec, lowering the temperature to 32-38 deg.c and stoving to water content of 24-28%.
7. The method for preparing a soft and comfortable dermal material according to claim 1, wherein in step S50, the method for preparing the composite antibacterial liquid comprises: preparing 20ml of silver nitrate solution with the concentration of 0.12-0.15 mol/L, adding 50ml of sodium borohydride with the concentration of 0.07-0.10 mol/L, dropwise adding 0.3-0.6 g of sodium citrate, and stirring and mixing for 2.5-3.5 hours to obtain the silver ion antibacterial agent; adding 1g of chitosan into 100ml of deionized water, stirring and mixing, and then adding 40ml to 60ml of 10% acetic acid solution to obtain acetic acid solution of chitosan; mixing the silver ion antibacterial agent with acetic acid solution of chitosan, adding 1.5-5 ml of epoxy chloropropane, uniformly stirring, and carrying out ultrasonic oscillation for 5 minutes to obtain the composite antibacterial liquid.
8. The method for preparing a soft and comfortable dermal material according to claim 7, wherein the amount of the silver ion antibacterial agent added is 0.6 to 1.2 times the weight of the chitosan.
9. The soft and comfortable dermal material of claim 1, wherein the amount of the composite antibacterial liquid sprayed in step S50 is 25ml/dm each time3～32ml/dm3。
10. A soft and comfortable dermal material, characterized by being produced by the production method according to any one of claims 1 to 9.
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| CN202111536641.5A CN114292968A (en) | 2021-12-15 | 2021-12-15 | Soft and comfortable leather material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111536641.5A CN114292968A (en) | 2021-12-15 | 2021-12-15 | Soft and comfortable leather material and preparation method thereof |
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| CN114292968A true CN114292968A (en) | 2022-04-08 |
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| CN202111536641.5A Withdrawn CN114292968A (en) | 2021-12-15 | 2021-12-15 | Soft and comfortable leather material and preparation method thereof |
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2021
- 2021-12-15 CN CN202111536641.5A patent/CN114292968A/en not_active Withdrawn
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