1. A method for preparing an antibacterial fabric by utilizing environment-friendly leather is characterized by comprising the following steps:

a. processing a surface layer: coating a first layer of aqueous PU slurry on release paper by using a roller coater, forming a # -shaped groove on the surface of the coating, spreading polyvinyl chloride fibers in a grid formed by the # -shaped groove, coating a second layer of aqueous PU slurry after the completion of the coating, allowing the polyvinyl chloride fibers to pass through the second layer of aqueous PU slurry, and drying after the completion of the coating to obtain a surface layer;

b. processing a base cloth layer: treating the cloth by adopting a padding method, storing an antibacterial agent in a rolling groove, taking out and drying, coating aqueous PU slurry on the cloth, laying a carbon fiber net on the slurry, connecting the carbon fiber net with carbon fiber wires protruding outwards, and drying after finishing to obtain a base cloth layer;

c. processing a foaming layer: respectively coating solvent-free PU foaming slurry on the base cloth layer and the surface layer by using a roller coater, passing through a foaming oven at a linear speed of 3-5m/min, wherein the temperature of the front section of the foaming oven is 50-80 ℃, the temperature of the middle section of the foaming oven is 80-120 ℃, the temperature of the rear section of the foaming oven is 120-160 ℃, and the foaming ratio is 1-2 to obtain a foaming layer, and in the foaming process, a toothed roller is used for respectively extruding the foaming layers on the base cloth layer and the surface layer to form a sawtooth groove on the foaming layers on the base cloth layer and the surface layer;

d. and (3) composite molding: and (3) hot-pressing and compounding the base fabric layer and the foaming layer on the surface layer at the pressure of 0.2-0.4MPa and the temperature of 130-140 ℃, wherein the sawtooth grooves on the foaming layer of the base fabric layer and the foaming layer are mutually meshed, the PU adhesive is coated on the binding surface in the compounding process, and the PU adhesive is naturally cooled after the hot pressing is finished, and the release paper is separated to obtain the antibacterial fabric.

2. The method for preparing antibacterial fabric from environment-friendly leather as claimed in claim 1, wherein the aqueous PU slurry is prepared by mixing 100-120 parts of aqueous polyurethane dispersoid, 10-30 parts of filler, 5-10 parts of foam stabilizer and 0.5-3 parts of dispersant by weight.

3. The method for preparing the antibacterial fabric from the environment-friendly leather as claimed in claim 1, wherein the solvent-free PU foaming slurry is prepared by mixing 80-100 parts by weight of oligomer polyol, 15-30 parts by weight of diisocyanate, 10-20 parts by weight of filler, 0.5-1 part by weight of stannous octoate and 1-10 parts by weight of foaming agent.

4. The method for preparing the antibacterial fabric by using the environment-friendly leather as claimed in claim 1, wherein the antibacterial agent is an organosilicon quaternary ammonium salt antibacterial agent.

5. The method for preparing the antibacterial fabric by using the environment-friendly leather as claimed in claim 1, wherein the thickness of the base fabric layer is equal to that of the foaming layer on the surface layer.

Background

The ecological leather is a leather product with various ecological indexes meeting the requirements of ecological standards, and the ecological indexes comprise the hexavalent chromium content, the formaldehyde content, the carcinogenic aromatic amine content and the pentachlorophenol content in the leather. Ecological leather will become the mainstream of leather industry development in the future. With the improvement of living standard, people have stronger health consciousness, and pay more and more attention to green, natural and pollution-free products, which is a main factor considered by consumers. Moreover, in domestic and foreign trade, green consumption gradually becomes a consumption trend, and will become a mainstream in the future.

The fabric made of the ecological leather in production has the defects that the surface layers are not firmly bonded, and the layering phenomenon is easy to occur, so that the normal use of the fabric is influenced.

Disclosure of Invention

The invention aims to solve the problems that the interlayer bonding of the fabric made of ecological leather is not firm and the layering is easy to occur, and aims to provide a method for preparing an antibacterial fabric by utilizing environment-friendly leather.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

a method for preparing an antibacterial fabric by utilizing environment-friendly leather comprises the following steps:

a. processing a surface layer: coating a first layer of aqueous PU slurry on release paper by using a roller coater, forming a # -shaped groove on the surface of the coating, spreading polyvinyl chloride fibers in a grid formed by the # -shaped groove, coating a second layer of aqueous PU slurry after the completion of the coating, allowing the polyvinyl chloride fibers to pass through the second layer of aqueous PU slurry, and drying after the completion of the coating to obtain a surface layer;

b. processing a base cloth layer: treating the cloth by adopting a padding method, storing an antibacterial agent in a rolling groove, taking out and drying, coating aqueous PU slurry on the cloth, laying a carbon fiber net on the slurry, connecting the carbon fiber net with carbon fiber wires protruding outwards, and drying after finishing to obtain a base cloth layer;

c. processing a foaming layer: respectively coating solvent-free PU foaming slurry on the base cloth layer and the surface layer by using a roller coater, passing through a foaming oven at a linear speed of 3-5m/min, wherein the temperature of the front section of the foaming oven is 50-80 ℃, the temperature of the middle section of the foaming oven is 80-120 ℃, the temperature of the rear section of the foaming oven is 120-160 ℃, and the foaming ratio is 1-2 to obtain a foaming layer, and in the foaming process, a toothed roller is used for respectively extruding the foaming layers on the base cloth layer and the surface layer to form a sawtooth groove on the foaming layers on the base cloth layer and the surface layer;

d. and (3) composite molding: and (3) hot-pressing and compounding the base fabric layer and the foaming layer on the surface layer at the pressure of 0.2-0.4MPa and the temperature of 130-140 ℃, wherein the sawtooth grooves on the foaming layer of the base fabric layer and the foaming layer are mutually meshed, the PU adhesive is coated on the binding surface in the compounding process, and the PU adhesive is naturally cooled after the hot pressing is finished, and the release paper is separated to obtain the antibacterial fabric.

Further, the aqueous PU slurry is prepared by mixing 120 parts of aqueous polyurethane dispersoid, 10-30 parts of filler, 5-10 parts of foam stabilizer and 0.5-3 parts of dispersant by weight.

Further, the solvent-free PU foaming slurry is prepared by mixing 80-100 parts of oligomer polyol, 15-30 parts of diisocyanate, 10-20 parts of filler, 0.5-1 part of stannous octoate and 1-10 parts of foaming agent in parts by weight.

Further, the antibacterial agent is an organosilicon quaternary ammonium salt antibacterial agent.

Furthermore, the thickness of the base cloth layer is equal to that of the foaming layer on the surface layer.

The invention has the beneficial effects that:

the invention has simple structure, when the surface layer is processed, the water-based PU sizing agent is coated in layers, the polyvinyl chloride fiber is spread between two layers of water-based PU sizing agent, the polyvinyl chloride fiber passes through one layer of water-based PU sizing agent, when foaming is carried out, the polyvinyl chloride fiber can extend into the solvent-free PU foaming sizing agent, after foaming is finished and solidification is finished, the polyvinyl chloride fiber can connect the surface layer with the foaming layer, the surface layer is prevented from being separated from the foaming layer, furthermore, the base cloth layer is processed by a padding method, so that the antibacterial agent is immersed on the base cloth layer, then the water-based PU sizing agent is coated on the base cloth layer, the carbon fiber net is bonded by the water-based PU sizing agent, carbon fiber wires arranged on the carbon fiber net can be inserted into the sizing agent when the solvent-free PU foaming sizing agent is coated, the base cloth layer can be connected with the foaming layer after the sizing agent is solidified, when the foaming layer on the base cloth layer is compounded with the foaming layer on the surface layer, carry out hot pressing laminating through PU glues, improve the cohesiveness between each surface course, prevent the layering between the surface course.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a cross-slot configuration of the present invention;

in the figure: 1. a first layer of aqueous PU slurry; 2. a well-shaped groove; 3. polyvinyl chloride fibers; 4. a second layer of aqueous PU slurry; 5. distributing; 6. a carbon fiber web; 7. carbon fiber filaments; 8. solvent-free PU foaming slurry; 9. and (4) PU glue.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Example 1

As shown in fig. 1-2; a method for preparing an antibacterial fabric by utilizing environment-friendly leather comprises the following steps:

a. processing a surface layer: coating a first layer of aqueous PU slurry on release paper by using a roller coater, forming a # -shaped groove 2 on the surface of the coating, spreading polyvinyl chloride fibers 3 in a grid formed by the # -shaped groove 2, coating a second layer of aqueous PU slurry after the completion, allowing the polyvinyl chloride fibers 3 to pass through the second layer of aqueous PU slurry, and drying to obtain a surface layer;

b. processing a base cloth layer: treating the cloth 5 by adopting a padding method, storing an antibacterial agent in a rolling groove, taking out and drying, coating aqueous PU slurry on the cloth 5, laying a carbon fiber net 6 on the slurry, connecting the carbon fiber net 6 with convex carbon fiber yarns 7, and drying after finishing to obtain a base cloth layer; the carbon fiber filaments 7 are interlaced in the carbon fiber mesh 6.

c. Processing a foaming layer: respectively coating solvent-free PU foaming slurry on the base cloth layer and the surface layer by using a roller coater, passing through a foaming oven at a linear speed of 3-5m/min, wherein the temperature of the front section of the foaming oven is 50-80 ℃, the temperature of the middle section of the foaming oven is 80-120 ℃, the temperature of the rear section of the foaming oven is 120-160 ℃, and the foaming ratio is 1-2 to obtain a foaming layer, and in the foaming process, a toothed roller is used for respectively extruding the foaming layers on the base cloth layer and the surface layer to form a sawtooth groove on the foaming layers on the base cloth layer and the surface layer;

d. and (3) composite molding: and (3) hot-pressing and compounding the base fabric layer and the foaming layer on the surface layer at the pressure of 0.2-0.4MPa and the temperature of 130-140 ℃, wherein the sawtooth grooves on the foaming layer of the base fabric layer and the foaming layer are mutually meshed, the PU adhesive is coated on the binding surface in the compounding process, and the PU adhesive is naturally cooled after the hot pressing is finished, and the release paper is separated to obtain the antibacterial fabric.

The surface of the first layer of aqueous PU slurry is provided with a well-shaped groove 2, the well-shaped groove 2 is utilized to ensure that the second layer of aqueous PU slurry can be deeply inserted into the first layer of aqueous PU slurry, the resistance of the horizontal movement of the two layers of slurry is increased, the connectivity of the two layers of slurry is improved, when the surface layer is processed, the aqueous PU slurry is coated in layers, polyvinyl chloride fibers 3 are spread in the two layers of aqueous PU slurry, the polyvinyl chloride fibers 3 penetrate through one layer of aqueous PU slurry, when foaming is carried out, the polyvinyl chloride fibers 3 can extend into the solvent-free PU foaming slurry, after foaming is finished and solidification, the polyvinyl chloride fibers 3 can connect the surface layer with the foaming layer to avoid the separation of the surface layer and the foaming layer, moreover, the base cloth layer is treated by a padding method to ensure that the antibacterial agent is immersed in the base cloth layer, then the aqueous PU slurry is coated on the base cloth layer to utilize the aqueous PU slurry to bond the carbon fiber net 6, when solvent-free PU foaming slurry is coated, the carbon fiber wires 7 arranged on the carbon fiber net 6 can be inserted into the slurry, the base cloth layer and the foaming layer can be connected after the slurry is solidified, and when the foaming layer on the base cloth layer is compounded with the foaming layer on the surface layer, hot-pressing lamination is carried out through PU glue, so that the cohesiveness between the surface layers is improved, and interlayer delamination between the surface layers is prevented. Foaming layer binding face on surface course and the base cloth layer sets up to the sawtooth structure, and two faces are after the laminating, and the relative movement of two foaming layers can be restricted to the sawtooth structure, and then improves the bonding effect of foaming layer.

Example 2

In addition to example 1, the aqueous PU slurry is prepared by mixing 120 parts by weight of 100-120 parts by weight of aqueous polyurethane dispersoid, 10-30 parts by weight of filler, 5-10 parts by weight of foam stabilizer and 0.5-3 parts by weight of dispersant.

The solvent-free PU foaming slurry is prepared by mixing 80-100 parts of oligomer polyol, 15-30 parts of diisocyanate, 10-20 parts of filler, 0.5-1 part of stannous octoate and 1-10 parts of foaming agent in parts by weight.

By using the water-based PU slurry and the solvent-free PU foaming slurry, the problems that the environment is polluted after an organic solvent is volatilized and the use safety of leather products is influenced by organic solvent residues in the conventional solvent-based PU slurry are solved.

The antibacterial agent is organosilicon quaternary ammonium salt antibacterial agent.

The thickness of the base cloth layer is equal to that of the foaming layer on the surface layer.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.