阅读说明：本技术 一种耐曲折抗菌皮革及其制备方法 (Flexing-resistant antibacterial leather and preparation method thereof ) 是由 郭邵杰 于 2020-07-02 设计创作，主要内容包括：本发明涉及皮革生产技术领域,具体涉及一种耐曲折抗菌皮革及其制备方法,包括粗皮革以及保护层,粗皮革浸于保护层之间设有银离子抗菌层,保护层包括蜡保护层、抗皱层、抗裂层、抗菌防霉层和耐摩擦层；抗菌防霉层采用弹性纤维、竹炭纤维、石墨烯粉末与水性聚氨酯树脂复合涂覆而成,蜡保护层为阳离子石蜡,石墨烯粉末、弹性纤维、竹炭纤维与水性聚氨酯树脂的重量份之比为5:5:6:10,抗皱层为聚酯纤维和水性聚氨酯树脂的复合层,聚酯纤维和水性聚氨酯树脂的重量之比为5:7-4:5,抗裂层为偏苯三酸三壬酯和水性聚氨酯树脂的复合层,偏苯三酸三壬酯与水性聚氨酯树脂的重量之比为3:10-8:15,耐摩擦层为顺丁橡胶,本发明具有抗皱、抗裂、杀菌、耐磨的优点。(The invention relates to the technical field of leather production, in particular to a flexing-resistant antibacterial leather and a preparation method thereof, wherein the flexing-resistant antibacterial leather comprises rough leather and protective layers, a silver ion antibacterial layer is arranged between the protective layers of the rough leather, and the protective layers comprise a wax protective layer, an anti-wrinkle layer, an anti-cracking layer, an antibacterial mildew-resistant layer and a friction-resistant layer; the anti-bacterial and anti-mildew layer is formed by compositely coating elastic fibers, bamboo carbon fibers, graphene powder and waterborne polyurethane resin, the wax protection layer is cationic paraffin, the weight ratio of the graphene powder, the elastic fibers, the bamboo carbon fibers and the waterborne polyurethane resin is 5:5:6:10, the anti-wrinkle layer is a composite layer of polyester fibers and the waterborne polyurethane resin, the weight ratio of the polyester fibers and the waterborne polyurethane resin is 5:7-4:5, the anti-crack layer is a composite layer of trinonyl trimellitate and the waterborne polyurethane resin, the weight ratio of the trinonyl trimellitate to the waterborne polyurethane resin is 3:10-8:15, and the friction-resistant layer is butadiene rubber.)

1. The utility model provides a resistant antibiotic leather that twists, includes coarse leather (1) and protective layer, its characterized in that: the coarse leather (1) is soaked between the protective layers and is provided with a silver ion antibacterial layer (2), and the protective layers comprise a wax protective layer (3), an anti-wrinkle layer (4), an anti-cracking layer (5), an antibacterial mildew-proof layer (6) and a friction-resistant layer (7);

the antibacterial and mildew-proof layer (6) is formed by compositely coating elastic fibers, bamboo charcoal fibers, graphene powder and waterborne polyurethane resin.

2. The flexing-resistant antibacterial leather and the preparation method thereof according to claim 1 are characterized in that: the wax protective layer (3) is cationic paraffin.

3. The flexing-resistant antibacterial leather and the preparation method thereof according to claim 1 are characterized in that: the weight ratio of the graphene powder to the elastic fiber to the bamboo charcoal fiber to the waterborne polyurethane resin is 5:5:6: 10.

4. the flexing-resistant antibacterial leather and the preparation method thereof according to claim 1 are characterized in that: the anti-wrinkle layer (4) is a composite layer of polyester fibers and waterborne polyurethane resin, and the weight ratio of the polyester fibers to the waterborne polyurethane resin is 5:7-4: 5.

5. The flexing-resistant antibacterial leather and the preparation method thereof according to claim 1 are characterized in that: the anti-cracking layer (5) is a composite layer of trinonyl trimellitate and waterborne polyurethane resin, and the weight ratio of trinonyl trimellitate to waterborne polyurethane resin is 3:10-8: 15.

6. The flexing-resistant antibacterial leather and the preparation method thereof according to claim 1 are characterized in that: the friction-resistant layer (7) is made of butadiene rubber.

7. A method for preparing the flexing-resistant antibacterial leather of the claims 1 to 6, which is characterized in that: the method comprises the following steps:

the method comprises the following steps: soaking animal fur, fleshing, unhairing, deliming, degreasing, washing, pickling and tanning to obtain rough leather;

step two: tanning the rough leather in the step one, adding a nano silver solution for soaking and washing, and retanning to obtain soft leather;

step three: performing primary coating, rolling, midway polishing and tumbling treatment on the soft leather obtained in the step two to obtain rough leather (1);

step four: and (3) sequentially coating the wax protection layer (3), the anti-wrinkle layer (4), the anti-crack layer (5), the antibacterial mildew-resistant layer (6) and the friction-resistant layer (7) on the rough leather (1) in the third step to obtain a finished leather product.

8. The method for preparing the flexing-resistant antibacterial leather according to claim 7, wherein the method comprises the following steps: in the fourth step, the coating step of the antibacterial and mildew-proof layer (6) is as follows: the elastic fiber and the bamboo charcoal fiber are coated on the surface layer of the anti-cracking layer (5) from top to bottom, then the graphene powder is uniformly coated on the surface layers of the elastic fiber and the bamboo charcoal fiber, and finally the waterborne polyurethane resin is uniformly coated.

9. The method for preparing the flexing-resistant antibacterial leather according to claim 7, wherein the method comprises the following steps: in the second step, the nano silver solution is gallic acid modified nano silver solution, and the preparation method of the nano silver solution comprises the following steps:

uniformly mixing water-soluble silver salt and gallic acid in a substance amount ratio of 1:1-1:1.5 in water, slowly adding into ph9-12 water solution, heating to 20-60 deg.C, stirring for 10-60min, adjusting to neutral, and adding butylamine to make the final concentration to 8-15 mM.

10. The method for preparing the flexing-resistant antibacterial leather according to claim 7, wherein the method comprises the following steps: in the fourth step, the coating mode is micro gravure coating, slit extrusion coating or blade coating.

Technical Field

The invention relates to the technical field of leather production, in particular to a flexing-resistant antibacterial leather and a preparation method thereof.

Background

Leather is a material commonly used in daily life, is used in various aspects such as wearing clothes, hats, furniture manufacturing and the like, and is a main body industry of physics, chemistry, products and the like of unhairing, tanning and the like, and supporting enterprises of leather chemical industry, leather hardware, leather machinery, auxiliary materials and the like. Currently, leather products used in many cases are leather shoes, leather clothes, leather sofas and the like.

With the continuous development of leather technology, the flexing resistance of the leather is greatly improved, but because the leather is easy to crease during the wearing process, especially during the wearing process of shoes and the using process of leather bags, the existing leather has poor flexing resistance and is easy to crease. In the process of wearing leather products such as leather shoes, fungi are often bred due to sweating and the like, so that the skin diseases or foot odor of users occur, the reason is that the warm and humid environment of the leather shoes is suitable for the fungi breeding, but the protective layer is only coated on the surface of the leather body in the preparation process of the existing leather products, has certain effects of resisting wrinkles, cracking, sterilizing and resisting wear, but cannot effectively protect the leather and the users due to poor effect.

Disclosure of Invention

The invention aims to provide the flexing-resistant antibacterial leather which has the advantages of antibiosis and bacteriostasis, long service life, friction resistance and flexing resistance and the preparation method thereof.

In order to solve the technical problems, the invention adopts the technical scheme that: the anti-bending antibacterial leather comprises rough leather and protective layers, wherein silver ion antibacterial layers are arranged between the rough leather and the protective layers in a soaking mode, and the protective layers comprise wax protective layers, anti-wrinkling layers, anti-cracking layers, antibacterial mildew-resistant layers and friction-resistant layers;

the antibacterial mildew-resistant layer is formed by compositely coating elastic fibers, bamboo charcoal fibers, graphene powder and waterborne polyurethane resin.

Further, the wax protective layer is cationic paraffin.

Further, the weight ratio of the graphene powder, the elastic fiber, the bamboo charcoal fiber and the waterborne polyurethane resin is 5:5:6: 10.

further, the anti-wrinkle layer is a composite layer of polyester fibers and waterborne polyurethane resin, and the weight ratio of the polyester fibers to the waterborne polyurethane resin is 5:7-4: 5.

Further, the anti-cracking layer is a composite layer of trinonyl trimellitate and waterborne polyurethane resin, and the weight ratio of trinonyl trimellitate to waterborne polyurethane resin is 3:10-8: 15.

Further, the friction-resistant layer is butadiene rubber.

The preparation method for preparing the flexing-resistant antibacterial leather comprises the following steps:

the method comprises the following steps: soaking animal fur, fleshing, unhairing, deliming, degreasing, washing, pickling and tanning to obtain rough leather;

step two: tanning the rough leather in the step one, adding a nano silver solution for soaking and washing, and retanning to obtain soft leather;

step three: performing primary coating, rolling, midway polishing and tumbling treatment on the soft leather obtained in the step two to obtain rough leather;

step four: and (3) sequentially coating the rough leather in the third step with a wax protection layer, a wrinkle resistant layer, a crack resistant layer, an antibacterial mildew resistant layer and a friction resistant layer to obtain a finished leather product.

Further, in the fourth step, the coating step of the antibacterial and mildew-proof layer is as follows: the elastic fiber and the bamboo charcoal fiber are coated on the surface layer of the anti-cracking layer from top to bottom, then the graphene powder is uniformly coated on the surface layers of the elastic fiber and the bamboo charcoal fiber, and finally the waterborne polyurethane resin is uniformly coated.

Further, the nano silver solution in the second step is gallic acid modified nano silver solution, and the preparation method of the nano silver solution comprises the following steps:

uniformly mixing water-soluble silver salt and gallic acid in a substance amount ratio of 1:1-1:1.5 in water, slowly adding into ph9-12 water solution, heating to 20-60 deg.C, stirring for 10-60min, adjusting to neutral, and adding butylamine to make the final concentration to 8-15 mM.

Further, in the fourth step, the coating method is micro gravure coating, slit die coating or blade coating.

Compared with the prior art, the invention has the advantages and positive effects that:

1. the invention provides the flexing-resistant antibacterial leather and the preparation method thereof, which are improved based on the traditional manufacturing method, and the antibacterial layer and the antibacterial mildew-proof layer of silver ions are added, so that the effects of sterilization and antibiosis can be achieved, the leather products are prevented from going moldy and smelly, the service life is prolonged, the industrial development is facilitated, and the requirements of users are met.

2. The flexing-resistant antibacterial leather and the preparation method thereof provided by the invention are improved based on the traditional preparation method, and the anti-wrinkle layer, the anti-crack layer and the friction-resistant layer can play a role in reducing abrasion and are more suitable for the requirements of users.

3. The thickness of the protective layer can be set according to the needs, the protective layer can be 25-125 mu m, the requirements of various kinds of leather can be met, and the requirements of various aspects are met.

Drawings

FIG. 1 is a view showing the structure of a leather product of the present invention.

In the figure: 1 part of rough leather, 2 parts of silver ion antibacterial layer, 3 parts of wax protective layer, 4 parts of anti-wrinkle layer, 5 parts of anti-crack layer, 6 parts of antibacterial and mildew-proof layer and 7 parts of friction-resistant layer.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description and accompanying drawings that illustrate the invention.

As shown in fig. 1:

a flexing-resistant antibacterial leather comprises rough leather 1 and protective layers, wherein the rough leather 1 is soaked between the protective layers and provided with a silver ion antibacterial layer 2, and the protective layers comprise a wax protective layer 3, an anti-wrinkle layer 4, an anti-cracking layer 5, an antibacterial mildew-resistant layer 6 and a friction-resistant layer 7;

the antibacterial mildew-proof layer 6 is formed by compositely coating elastic fibers, bamboo charcoal fibers, graphene powder and waterborne polyurethane resin.