High-toughness environment-friendly composite artificial leather

Abstract

The invention relates to high-toughness environment-friendly composite artificial leather and belongs to the field of artificial leather. The high-toughness environment-friendly composite artificial leather comprises a resin layer, and the resin layer is composed of 100 parts of waterborne polyurethane resin, 8 parts of a curing agent and 3 parts of auxiliaries; comprising an elastic layer made of 40 parts of glass fibers; the material also comprises 10 parts of a dispersant, 2 parts of a heat-resistant stabilizer, 3 parts of a foaming agent, 30 parts of a plasticizer and 20 parts of a filling layer. According to the high-toughness environment-friendly composite artificial leather, the influence on the environment is reduced, the toughness and the strength of the product are improved through special processes and material selection, such as the polyester fiber base cloth and the glass fiber mesh cloth, so that the artificial leather has the advantages of soft texture and high strength, and the heat-resistant stabilizer and the light stabilizer are added, so that the artificial leather is more environment-friendly. The heat resistance and weather resistance of the material are improved, the material can keep stable performance under high temperature and ultraviolet irradiation, and the wear resistance and impact resistance of the material are improved by adding a specific curing agent and auxiliaries, such as an epoxy resin curing agent, so that the service life of the product is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of artificial leather, in particular to a high-toughness environmentally friendly composite artificial leather. Background Art

[0002] Artificial leather is a synthetic leather-like material, also known as imitation leather or rubber. It is a composite material made of artificial materials such as PVC and PU through a specific process on a textile cloth base or a non-woven cloth base. It looks and feels like natural leather and can be used instead of natural leather in many scenarios. Artificial leather is mainly divided into three categories: PVC artificial leather, PU artificial leather and PU synthetic leather. Among them, PVC artificial leather is wear-resistant, water-resistant and aging-resistant; PU artificial leather is soft and elastic; PU synthetic leather has good air permeability and wear resistance. Artificial leather has the characteristics of a wide variety of patterns and colors, good waterproof performance, neat edges, high utilization rate and relatively low price. However, its feel and elasticity generally cannot achieve the effect of genuine leather, and some artificial leathers are less environmentally friendly.

[0003] When composite artificial leather is in use, the edges are subject to more wear and tear, so the edges of TPU composite artificial leather are easily worn and cracked. Once the edges of the artificial leather are damaged, the internal materials of the composite artificial leather are easily damaged. The artificial leather itself lacks toughness, and insufficient toughness will cause the finished artificial leather to wrinkle easily, thus affecting its service life. Therefore, this application proposes another technical solution to solve the above problem. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a high-toughness environmentally friendly composite artificial leather, which has the advantages of increased high toughness and environmental protection of artificial leather, and solves the problem that the edges of the composite artificial leather are subject to more wear when in use, so the edges of the TPU composite artificial leather are easily worn and cracked, and when the edges of the artificial leather are damaged, the internal materials of the composite artificial leather are easily damaged, and the toughness of the composite artificial leather itself is insufficient, and insufficient toughness will cause the finished artificial leather to be easy to wrinkle, thereby affecting the service life.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of increasing the high toughness and environmental protection of artificial leather, the present invention provides the following technical solution: a high-toughness environmentally friendly composite artificial leather, characterized in that it includes the following raw materials in proportion by weight: a resin layer, the resin layer is composed of 100 parts of water-based polyurethane resin, 8 parts of curing agent and 3 parts of auxiliary agent; an elastic layer, the elastic layer is 40 parts of glass fiber; and also includes 10 parts of dispersant, 2 parts of heat-resistant stabilizer, 3 parts of foaming agent, 30 parts of plasticizer and 20 parts of filling layer.

[0008] Preferably, the plasticizer can be selected from one or a combination of two or more of phthalate, phosphate, and epoxy plasticizers, and the filling layer is light calcium carbonate.

[0009] Preferably, the dispersant is modified activated carbon-supported nano nitrogen-doped titanium dioxide, and the heat-resistant stabilizer can be selected from one or a combination of two or more of calcium zinc stabilizers, metal soaps, and rare earth stabilizers.

[0010] Preferably, the raw materials are included in the following weight ratio: the mass of the resin layer is 30%-35% of the total mass.

[0011] Preferably, the raw materials are included in the following weight ratio: the mass ratio of the dispersant to the stabilizer is 5:1.

[0012] Another technical problem to be solved by the present invention is to provide a high-toughness environmentally friendly composite artificial leather, comprising the following steps:

[0013] 1) Preparation of resin layer

[0014] The raw materials for preparing the PVC surface layer are placed in a high-speed mixer according to the above-mentioned ratio for high-speed mixing and stirring, the stirring temperature is 90-130°C, the stirring time is 120-200 seconds, to obtain a mixed material, the mixed material is discharged into an internal mixer for mixing, the mixing temperature is 130°C, the mixing time is 200 seconds, after the mixing is completed, it is discharged to an open mixer, plasticated at 150°C for 30 minutes, and then transported to a calender to be calendered into a sheet, the calendering temperature is 160°C, and the surface layer film is obtained after calendering.

[0015] 2) Preparation of elastic layer

[0016] The glass fiber mesh cloth is compounded with the resin layer, fixed by heat pressing or chemical bonding, and finally cooled.

[0017] 3) Preparation of foaming layer

[0018] The raw materials for preparing the foaming layer are stirred and mixed evenly in a high-speed mixer according to the above ratio, the stirring temperature is 100-120°C, and the stirring time is 100-200 seconds to make a foaming layer paste, the foaming layer paste is evenly coated on the release paper, and then dried, and then coated with an adhesive, and then the base fabric is attached to the foaming layer through the adhesive, and then foaming is carried out, the foaming temperature is 180-220°C, and then the release paper is peeled off to obtain a base fabric and a foaming layer that are composited into one.

[0019] 4) Finished product lamination

[0020] The surface film and the elastic layer and the foaming layer which are composited into one are composited to obtain an environmentally friendly composite artificial leather including a resin layer, a foaming layer and an elastic layer arranged in sequence from top to bottom. The composite artificial leather is heat-treated to ensure sufficient adhesion between the layers and the stability of the material, and surface treatments such as embossing and sanding are performed to meet specific appearance and feel requirements.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the present invention provides a high-toughness environmentally friendly composite artificial leather having the following

[0023] Beneficial effects:

[0024] The high-toughness environmentally friendly composite artificial leather uses environmentally friendly raw materials and production processes, such as avoiding the use of harmful solvents and using water-based coatings and solvent-free polyurethane resins instead, thereby reducing the impact on the environment. Through special processes and material selections, such as using polyester fiber base cloth and glass fiber mesh cloth, the toughness and strength of the product are improved, so that the artificial leather has the advantages of soft texture and high strength. By adding heat stabilizers and light stabilizers, the heat resistance and weather resistance of the material are improved, so that it can maintain stable performance even under high temperature and ultraviolet radiation. By adding specific curing agents and additives, such as isocyanate curing agents and epoxy resin curing agents, the wear resistance and impact resistance of the material are improved. Due to the improvement of the comprehensive performance of the material in terms of wear resistance, cold resistance, impact resistance, etc., the service life of the product is extended. In addition, some materials involve the use of construction waste PVC as the base material, and through secondary processing and reproduction, the pollution of construction waste is effectively reduced, while reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the preparation of a high-toughness environmentally friendly composite artificial leather proposed in the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1: It comprises the following raw materials in proportion by weight: a resin layer, which is composed of 100 parts of waterborne polyurethane resin, 8 parts of curing agent and 3 parts of auxiliary agent; an elastic layer, which is 40 parts of glass fiber; and also comprises 10 parts of dispersant, 2 parts of heat-resistant stabilizer, 3 parts of foaming agent, 30 parts of plasticizer and 20 parts of filling layer; the plasticizer can be selected from one or a combination of two or more of phthalate plasticizers, phosphate esters and epoxy plasticizers.

[0028] Example 2: The filling layer is light calcium carbonate, the dispersant is modified activated carbon-loaded nano-nitrogen-doped titanium dioxide, the heat-resistant stabilizer can be selected from one or a combination of two or more of calcium zinc, metal soap, and rare earth stabilizers, including the following raw materials in weight proportions: the mass of the resin layer is 30%-35% of the total mass, including the following raw materials in weight proportions: the mass ratio of the dispersant to the stabilizer is 5:1.

[0029] Example 3: Prepare an elastic layer, composite the glass fiber mesh cloth with the resin layer, fix them by hot pressing or chemical bonding, and finally cool them to prepare a foaming layer. Stir and mix the raw materials for the foaming layer in a high-speed mixer according to the above-mentioned ratio until they are evenly mixed. The stirring temperature is 100-120°C and the stirring time is 100-200 seconds to make a foaming layer paste. The foaming layer paste is evenly coated on the release paper, and then dried. Then, an adhesive is applied, and the base cloth is attached to the foaming layer through the adhesive, and then foaming is performed. The foaming temperature is 180-220°C. Then, the release paper is peeled off to obtain a base cloth and a foaming layer composited into one.

[0030] Embodiment 4: Finished product compounding, the surface film and the elastic layer and the foaming layer compounded as one are compounded to obtain an environmentally friendly composite artificial leather including a resin layer, a foaming layer and an elastic layer arranged in sequence from top to bottom, the composite artificial leather is heat-treated to ensure sufficient adhesion between the layers and the stability of the material, and surface treatment such as embossing, sanding, etc. is performed to meet specific appearance and feel requirements.

[0031] The beneficial effects of the present invention are as follows: the high-toughness environmentally friendly composite artificial leather uses environmentally friendly raw materials and production processes, such as avoiding the use of harmful solvents and using water-based coatings and solvent-free polyurethane resins instead, thereby reducing the impact on the environment; through special processes and material selections, such as using polyester fiber base cloth and glass fiber mesh cloth, the toughness and strength of the product are improved, so that the artificial leather has the advantages of soft texture and high strength; by adding heat-resistant stabilizers and light stabilizers, the heat resistance and weather resistance of the material are improved, so that the performance can be kept stable even under high temperature and ultraviolet irradiation; by adding specific curing agents and additives, such as isocyanate curing agents and epoxy resin curing agents, the wear resistance and impact resistance of the material are improved; due to the improvement of the comprehensive performance of the material in terms of wear resistance, cold resistance, impact resistance, etc., the service life of the product is extended; and some materials involve using construction waste PVC as base material, and through secondary processing and reproduction, the pollution of construction waste is effectively reduced, and the production cost is reduced at the same time.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-toughness environmentally friendly composite artificial leather, characterized in that: The invention comprises the following raw materials in proportion by weight: a resin layer, which is composed of 100 parts of waterborne polyurethane resin, 8 parts of curing agent and 3 parts of auxiliary agent; an elastic layer, which is 40 parts of glass fiber; and 10 parts of dispersant, 2 parts of heat-resistant stabilizer, 3 parts of foaming agent, 30 parts of plasticizer and 20 parts of filling layer.

2. The high-toughness environmentally friendly composite artificial leather according to claim 1, characterized in that: The plasticizer can be selected from one or a combination of two or more of phthalate, phosphate, and epoxy plasticizers, and the filling layer is light calcium carbonate.

3. The high-toughness environmentally friendly composite artificial leather according to claim 1, characterized in that: The dispersant is modified activated carbon loaded with nitrogen-doped nano-titanium dioxide, and the heat-resistant stabilizer can be selected from one of calcium zinc stabilizers, metal soaps, and rare earth stabilizers, or a combination of two or more thereof.

4. The high-toughness environmentally friendly composite artificial leather according to claim 1, characterized in that: The invention comprises raw materials in the following weight proportions: the mass of the resin layer is 30%-35% of the total mass.

5. The high-toughness environmentally friendly composite artificial leather according to claim 1, characterized in that: The invention comprises raw materials in the following weight proportions: the mass ratio of the dispersant to the stabilizer is 5:

1.

6. A process for preparing high-toughness environmentally friendly composite artificial leather, characterized in that: The following steps are involved: 1) Preparation of resin layer The raw materials for preparing the PVC surface layer are placed in a high-speed mixer according to the above-mentioned ratio for high-speed mixing and stirring, the stirring temperature is 90-130°C, the stirring time is 120-200 seconds, to obtain a mixed material, the mixed material is discharged into an internal mixer for mixing, the mixing temperature is 130°C, the mixing time is 200 seconds, after the mixing is completed, it is discharged to an open mixer, plasticated at 150°C for 30 minutes, and then transported to a calender to be calendered into a sheet, the calendering temperature is 160°C, and the surface layer film is obtained after calendering. 2) Preparation of elastic layer The glass fiber mesh cloth is compounded with the resin layer, fixed by heat pressing or chemical bonding, and finally cooled. 3) Preparation of foaming layer The raw materials for preparing the foaming layer are stirred and mixed evenly in a high-speed mixer according to the above ratio, the stirring temperature is 100-120°C, and the stirring time is 100-200 seconds to make a foaming layer paste, the foaming layer paste is evenly coated on the release paper, and then dried, and then coated with an adhesive, and then the base fabric is attached to the foaming layer through the adhesive, and then foaming is carried out, the foaming temperature is 180-220°C, and then the release paper is peeled off to obtain a base fabric and a foaming layer that are composited into one. 4) Finished product lamination The surface film and the elastic layer and the foaming layer which are composited into one are composited to obtain an environmentally friendly composite artificial leather including a resin layer, a foaming layer and an elastic layer arranged in sequence from top to bottom. The composite artificial leather is heat-treated to ensure sufficient adhesion between the layers and the stability of the material, and surface treatments such as embossing and sanding are performed to meet specific appearance and feel requirements.

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