High-strength composite tear-resistant perforated PVC (polyvinyl chloride) artificial leather as well as preparation method and application thereof

Abstract

The invention relates to the technical field of high polymer materials, in particular to high-strength composite tear-resistant perforated PVC (polyvinyl chloride) artificial leather as well as a preparation method and application thereof. The problems that after the PVC artificial leather is punched, coils are loosened (laddering), holes are deformed, and the tearing strength is obviously reduced are solved. The leather comprises a water-based coating, a PVC compact layer, a PVC foaming layer, a PVC bonding layer and a base cloth layer which are arranged in sequence; the total mass of the leather is 100%, the mass ratio of the water-based coating is 1%-5%, the mass ratio of the PVC compact layer is 15%-30%, the mass ratio of the PVC foaming layer is 15%-35%, the mass ratio of the PVC bonding layer is 5%-10%, and the mass ratio of the base cloth layer is 15%-35%; wherein the base cloth layer is a three-dimensional network structure base cloth formed by mutually entangling superfine fiber bundles formed by splitting sea-island fibers. During preparation, mixing, coating and punching are sequentially carried out, and the high-strength composite tear-resistant punched PVC artificial leather is prepared and can be applied to automotive interiors.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, and in particular to a high-strength composite tear-resistant perforated PVC artificial leather, its preparation method, and its application. Background Technology

[0002] Currently, most mainstream PVC artificial leather on the market uses ordinary weft-knitted base fabric as the support layer. This type of base fabric presents the following technical problems after perforation processing: Coil unraveling (spinning) problem: The yarn cut during the punching process loses the interlocking force between the coils, causing the edge of the hole to easily unravel during subsequent use, the hole continues to enlarge, and may even cause damage to the overall structure of the fabric. Hole deformation and curling: Weft-knitted fabrics have high internal stress and good elasticity. After punching, the holes are difficult to maintain their initial shape, and the edges are prone to curling or twisting, affecting the product's appearance. The tear strength is significantly reduced: the hole becomes a stress concentration point, and when subjected to force, it is easy to cause tearing and rapid propagation from the hole; Poor dimensional stability: After dense perforation, the fabric's shape retention decreases, and it is easily deformed under external force or its own weight, causing the product to lose its shape.

[0003] Therefore, existing PVC artificial leather cannot simultaneously meet the requirements of high strength, tear resistance, and dimensional stability after perforation, limiting its use in high-end applications such as automotive interiors. Therefore, there is an urgent need to develop a perforated leather material that combines high strength, tear resistance, and good processing adaptability. Summary of the Invention

[0004] The purpose of this invention is to provide a high-strength composite tear-resistant perforated PVC artificial leather, its preparation method, and its application. This invention solves the problems in the prior art where the use of ordinary weft-knitted base fabric leads to coil unraveling (fraying), hole deformation, and a significant decrease in tear strength after perforation of PVC artificial leather.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The first aspect of this invention provides a high-strength composite tear-resistant perforated PVC artificial leather, the leather comprising, in sequence, a water-based coating, a PVC dense layer, a PVC foam layer, a PVC adhesive layer, and a base fabric layer; based on the total mass of the leather (100%), the water-based coating accounts for 1% to 5% of the mass, the PVC dense layer accounts for 15% to 30% of the mass, the PVC foam layer accounts for 15% to 35% of the mass, the PVC adhesive layer accounts for 5% to 10% of the mass, and the base fabric layer accounts for 15% to 35% of the mass. The base fabric layer is a three-dimensional mesh structure base fabric formed by the intertwining of ultrafine fiber bundles formed by the opening of island fibers; Furthermore, the leather surface is perforated, and the perforation penetrates at least the water-based coating, the PVC dense layer, the PVC foam layer, and the PVC adhesive layer.

[0006] Furthermore, based on the mass ratio of the water-based coating, the raw material composition of the water-based coating includes: 85%~95% water-based polyurethane, 1%~2% wetting agent and 1%~3% curing agent; The wetting agent is silicone resin; the curing agent is carbodiimide.

[0007] Furthermore, based on the mass ratio of the PVC dense layer, the raw material composition of the PVC dense layer includes 35%~55% PVC resin, 30%~40% plasticizer, 1%~3% heat stabilizer, 5%~10% filler and 3%~8% colorant. The plasticizer is a phthalate. The heat stabilizer is a calcium-zinc stabilizer, which includes zinc stearate and calcium stearate. The filler is calcium carbonate, and the colorant includes organic and inorganic colorants. The organic colorant includes blue pigment and green pigment, and the inorganic colorant is titanium dioxide or carbon black.

[0008] Furthermore, based on the mass ratio of the PVC foam layer, the raw material composition of the PVC foam layer includes: 40%~60% PVC resin, 30%~40% plasticizer, 1%~3% heat stabilizer, 1%~3% ADC foaming agent, 5%~10% flame retardant, and 5%~10% filler. The plasticizer is phthalate, the heat stabilizer is calcium-zinc stabilizer, the calcium-zinc stabilizer includes zinc stearate and calcium stearate, the ADC foaming agent is azodicarbonamide, the flame retardant is antimony trioxide, and the filler is calcium carbonate.

[0009] Furthermore, based on the mass ratio of the PVC adhesive layer, the raw material composition of the PVC adhesive layer includes 40%~60% PVC resin, 30%~40% plasticizer, 1%~3% heat stabilizer and 5%~10% filler; The plasticizer is a phthalate, the heat stabilizer is a calcium-zinc stabilizer, the calcium-zinc stabilizer includes zinc stearate and calcium stearate, and the filler is calcium carbonate.

[0010] A second aspect of this invention provides a method for preparing high-strength composite tear-resistant perforated PVC artificial leather, comprising the following steps: (1) Mixing: Prepare PVC dense layer slurry, PVC foam layer slurry and PVC adhesive layer slurry respectively; (2) Coating and lamination: The PVC dense layer slurry is coated onto the release paper and cured at a first temperature to form a PVC dense layer; a PVC foam layer slurry is coated onto the PVC dense layer and cured at a second temperature to form a PVC foam layer; a PVC adhesive layer slurry is coated onto the PVC foam layer and the base fabric layer is bonded together; after curing and bonding at a third temperature, the release paper is peeled off to obtain a semi-finished product; (3) Post-processing: A water-based coating is applied to the surface of the PVC dense layer of the semi-finished product by roller and dried, followed by embossing and perforation.

[0011] Furthermore, in step (2), The thickness of the PVC dense layer is 0.15~0.3mm, and the first temperature is 190~200℃; The thickness of the PVC foam layer is 0.2~0.5mm, and the second temperature is 160~180℃; The thickness of the PVC adhesive layer is 0.05~0.1mm, the thickness of the base fabric layer is 0.4~0.6mm, and the third temperature is 190~200℃.

[0012] Further, in step (3), the thickness of the water-based coating is 3~5µm; the roller is 100~200 mesh; and the drying temperature is 130~150℃.

[0013] Furthermore, in step (3), the drilling process is carried out by mechanical drilling or laser drilling, and the hole diameter is 0.8mm ~ 1mm, and the hole spacing is 3mm ~ 5mm.

[0014] The third aspect of this invention provides the application of high-strength composite tear-resistant perforated PVC artificial leather in automotive interiors.

[0015] Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art: By using a three-dimensional mesh structure base fabric formed by opening sea island fibers, the ultra-fine fiber network around the holes after punching can share the stress and effectively prevent tear propagation, thus solving the technical bottleneck of coil detachment and significant decrease in tear strength that easily occurs after punching holes in traditional weft-knitted base fabrics.

[0016] By integrating a five-layer composite structure, the leather can maintain excellent dimensional stability and mechanical strength after perforation, overcoming the problems of deformation and curling of traditional perforated leather.

[0017] By adjusting and optimizing the raw material ratios and process parameters of each functional layer, the stability and yield rate of the product during the perforation process are ensured, making it suitable for high-requirement applications such as automotive interiors. While maintaining the wear-resistant advantages of traditional PVC artificial leather, it also features high strength, tear resistance, and good breathability. Attached Figure Description

[0018] The following sections will describe some specific embodiments of the invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic diagram of the structure of the high-strength composite tear-resistant perforated PVC artificial leather provided in this invention; Figure 2 This is a schematic diagram of the three-dimensional mesh structure of the base fabric layer provided in this invention; The accompanying figure is labeled as follows: 1. Water-based coating; 2. Dense PVC layer; 3. Foamed PVC layer; 4. Adhesive PVC layer; 5. Base fabric layer. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This example discloses a high-strength composite tear-resistant perforated PVC artificial leather, see reference. Figure 1 As shown, the leather includes a water-based coating 1, a PVC dense layer 2, a PVC foam layer 3, a PVC adhesive layer 4, and a base fabric layer 5 arranged sequentially. Based on the total mass of the leather as 100%, in this example, the mass percentage of the water-based coating 1 is 1% to 5%, the mass percentage of the PVC dense layer 2 is 15% to 30%, the mass percentage of the PVC foam layer 3 is 15% to 35%, the mass percentage of the PVC adhesive layer 4 is 5% to 10%, and the mass percentage of the base fabric layer 5 is 15% to 35%.

[0021] Based on the mass ratio of waterborne coating 1, the raw material composition of waterborne coating 1 includes: 85%~95% waterborne polyurethane, 1%~2% wetting agent and 1%~3% curing agent. The wetting agent is silicone resin; the curing agent is carbodiimide.

[0022] Based on the mass ratio of PVC dense layer 2, the raw material composition of PVC dense layer 2 includes 35%~55% PVC resin, 30%~40% plasticizer, 1%~3% heat stabilizer, 5%~10% filler and 3%~8% colorant. The plasticizer is phthalate, the heat stabilizer is calcium-zinc stabilizer, specifically zinc stearate and calcium stearate, the filler is calcium carbonate, and the colorant includes organic and inorganic colorants. The organic colorant includes blue pigment and green pigment, and the inorganic colorant is titanium dioxide or carbon black.

[0023] Based on the mass ratio of PVC foam layer 3, the raw material composition of PVC foam layer 3 includes: 40%~60% PVC resin, 30%~40% plasticizer, 1%~3% heat stabilizer, 1%~3% ADC foaming agent, 5%~10% flame retardant and 5%~10% filler. The plasticizer is phthalate, the heat stabilizer is calcium-zinc stabilizer, specifically including zinc stearate and calcium stearate, the ADC foaming agent is azodicarbonamide, the flame retardant is antimony trioxide, and the filler is calcium carbonate.

[0024] Based on the mass ratio of PVC adhesive layer 4, the raw material composition of PVC adhesive layer 4 includes 40%~60% PVC resin, 30%~40% plasticizer, 1%~3% heat stabilizer and 5%~10% filler. The plasticizer is phthalate, the heat stabilizer is calcium-zinc stabilizer, specifically including zinc stearate and calcium stearate, and the filler is calcium carbonate.

[0025] This example also provides a method for preparing high-strength composite tear-resistant perforated PVC artificial leather, specifically including the following steps: (1) Mixing: Prepare PVC dense layer slurry, PVC foam layer slurry and PVC adhesive layer slurry respectively; (2) Coating and lamination: The PVC dense layer slurry is coated onto the release paper and cured at the first temperature to form a PVC dense layer; the PVC foam layer slurry is coated onto the PVC dense layer and cured at the second temperature to form a PVC foam layer; the PVC adhesive layer slurry is coated onto the PVC foam layer and the base fabric layer is bonded together. After curing and bonding at the third temperature, the release paper is peeled off to obtain a semi-finished product. (3) Post-processing: A water-based coating is applied to the surface of the PVC dense layer of the semi-finished product by roller and dried, followed by embossing and perforation.

[0026] In step (2), the thickness of the PVC dense layer is 0.15~0.3mm, and the first temperature is 190~200℃; The thickness of the PVC foam layer is 0.2~0.5mm, and the second temperature is 160~180℃; The thickness of the PVC adhesive layer is 0.05~0.1mm, the thickness of the base fabric layer is 0.4~0.6mm, and the third temperature is 190~200℃.

[0027] In step (3), the thickness of the water-based coating is 3~5µm; the roller is 100~200 mesh; and the drying temperature is 130~150℃.

[0028] The aforementioned perforation process employs mechanical or laser perforation methods, with the hole diameter controlled between 0.8mm and 1mm and the hole spacing between 3mm and 5mm. This combination of parameters precisely controls the airflow resistance and distribution through the leather, thereby optimizing the airflow efficiency of the car seat ventilation system and directly affecting the microclimate environment of the surface in contact with the human body, enhancing the dryness and comfort of the ride.

[0029] The high-strength composite tear-resistant perforated PVC artificial leather prepared by the above method can be used in automotive interiors.

[0030] The present invention will be further illustrated below through specific embodiments. Example 1

[0031] This embodiment provides a high-strength composite tear-resistant perforated PVC artificial leather and its preparation method, as detailed below: 1. Raw material ratio (based on the total mass of raw materials in each layer being 100%) Water-based coating (5% by weight, 0.003mm thickness): Water-based polyurethane: 95%; Wetting agent (organic silicone surfactant): 2%; Curing agent (carbodiimide): 3%; PVC dense layer (30% by weight, 0.2mm thick): PVC resin (average degree of polymerization 1650~1850): 50%; plasticizer (phthalate): 36%; calcium-zinc composite heat stabilizer (zinc stearate): 2%; filler (calcium carbonate, 2000 mesh): 7%; colorant (blue pigment): 5%; PVC foam layer (30% by weight, 0.4mm thickness): PVC resin (average degree of polymerization P=900~1000): 45%; plasticizer (phthalate): 35%; calcium-zinc composite heat stabilizer (calcium stearate): 2%; ADC foaming agent (azodicarbonamide): 3%; flame retardant (antimony trioxide): 8%; filler (calcium carbonate, 1500~2000 mesh): 7%; PVC adhesive layer (10% by weight, 0.1mm thickness): PVC resin (average degree of polymerization P=1400~1600): 55%; plasticizer (phthalate): 35%; calcium-zinc composite heat stabilizer (zinc stearate): 2%; filler (calcium carbonate, 1500~2000 mesh): 8%; Base fabric layer (25% by weight): A three-dimensional mesh structure base fabric is made of intertwined ultrafine fiber bundles formed by the opening of island fibers (island component: polyester PET; sea component: polyethylene PE) using alkali solution. Figure 2 As shown.

[0032] 2. Preparation method (1) Mixing: According to the above proportions, put the raw materials of PVC dense layer, PVC foam layer and PVC adhesive layer into a high-speed mixer and stir at 1300 rpm for 45 minutes until they are evenly mixed to make the corresponding slurry.

[0033] (2) Coating and lamination: The PVC dense layer slurry is evenly coated onto the release paper using a scraper and then cured in an oven at 195°C to form a dense layer with a thickness of approximately 0.2 mm.

[0034] A PVC foaming layer slurry is coated onto the dense layer, and then the layer is foamed and cured in an oven at 170°C to form a foaming layer with a thickness of about 0.4 mm.

[0035] A PVC adhesive layer slurry is applied to the foamed layer, and then the high-strength tear-resistant base fabric layer is attached. The bonding is then cured in an oven at 195°C.

[0036] Peel the semi-finished product off the release paper and roll it up.

[0037] (3) Post-processing: Surface treatment: The prepared water-based coating slurry is transferred to the surface of the PVC dense layer of the semi-finished product through a 150-mesh gravure roller and dried at 140°C to form a water-based coating.

[0038] Embossing: Embossing the leather surface using a pattern mold at 150℃.

[0039] Perforation: Mechanical perforation is used to perforate the embossed leather surface. The hole diameter is 0.8mm and the hole spacing is 3mm, forming a regular hole array. The perforation penetrates the water-based coating, PVC dense layer, PVC foam layer, and PVC adhesive layer, and extends into the surface network structure of the base fabric layer. Example 2

[0040] The difference between this embodiment and Embodiment 1 is that the mass ratio of each functional layer has been adjusted to optimize the balance between product cost and performance.

[0041] Water-based coating: 2% by weight PVC dense layer: accounts for 30% of the total weight. PVC foam layer: 25% by weight PVC adhesive layer: 8% by weight High-strength tear-resistant base fabric layer: 35% by weight (The composition of other raw materials, preparation methods and process parameters are the same as in Example 1) Example 3

[0042] The difference between this embodiment and Embodiment 1 is that the proportion of the foam layer was adjusted and the perforation parameters were optimized, in order to obtain a better soft feel and breathability.

[0043] Water-based coating: 2% by weight PVC dense layer: accounts for 30% of the total weight. PVC foam layer: 35% by weight PVC adhesive layer: 8% by weight High-strength tear-resistant base fabric layer: 25% by weight Drilling parameters: hole diameter is 1mm, hole spacing is 5mm.

[0044] (The composition of other raw materials, preparation methods and process parameters are the same as in Example 1) Comparative Example 1 (Ordinary weft-knitted base fabric)

[0045] Except for replacing the "high-strength tear-resistant base fabric layer" with an equal mass ratio of ordinary weft-knitted polyester fiber base fabric, the other raw materials, proportions and preparation processes are exactly the same as in Example 1. Comparative Example 2: Base fabrics with different degrees of fiber opening

[0046] This comparative example aims to illustrate the key impact of the base fabric "fiber opening" process on the present invention.

[0047] Except for replacing the "high-strength tear-resistant base fabric layer" with a base fabric made of the same island fiber but not fully opened (opening rate <50%), the other raw materials, proportions and preparation processes are exactly the same as in Example 1.

[0048] Comparative Example 3: Microfiber base fabrics with different structures

[0049] This comparative example aims to demonstrate that not all microfiber substrates can achieve the effects of this invention, highlighting the necessity of the "three-dimensional mesh structure".

[0050] Except for replacing the "high-strength tear-resistant base fabric layer" with polyester microfiber nonwoven fabric produced by conventional meltblown method (whose fibers are arranged randomly in one direction and lack the three-dimensional mechanical interlocking structure formed by "fiber opening-entanglement"), the other raw materials, proportions and preparation processes are exactly the same as in Example 1. Performance Testing and Comparative Analysis

[0051] Key performance tests were performed on the leather samples obtained from all the above embodiments and comparative examples after perforation. The results are shown in the table below: Table 1 Performance Data Sheet

[0052] Note: The resistance to detachment of the perforation was evaluated by observing and rubbing the edges of the perforation in simulated actual use.

[0053] Results analysis:

[0054] Example 2 achieved the highest tear strength (98N) by increasing the proportion of the high-strength base fabric layer to 35%. This demonstrates that by adjusting the proportion of the five-layer structure described in this invention, the core mechanical properties of the final product can be specifically improved to meet the strength requirements of different application scenarios.

[0055] Comparative Example 1, due to the inherent porosity of its weft-knitted structure, initially exhibited acceptable air permeability. However, its fatal weakness lay in structural instability, leading to a sharp deterioration in tear strength and anti-unraveling properties after perforation, thus failing to meet practical application requirements. This invention, while maintaining excellent air permeability, fundamentally overcomes this structural defect.

[0056] Comparative Example 2 (insufficiently opened fibers) showed significantly inferior performance compared to Example 1, particularly in tear strength and resistance to unraveling. This demonstrates that island-of-the-sea fibers alone are insufficient; a thorough "fiber opening" process is necessary to release the ultrafine fibers and allow them to entangle and form a three-dimensional network structure, which is essential for achieving the tear-resistant effect of this invention.

[0057] Although Comparative Example 3 (meltblown nonwoven fabric) is composed of microfibers, its tear strength and anti-fraying properties are far inferior to those of the embodiments of the present invention. This indicates that the effect of the present invention does not stem from the "microfiber" material itself, but from the "three-dimensional intricate network structure" formed through the specific process of "island-sea fiber opening". This structure provides a unique stress dispersion mechanism that is not present in other existing microfiber base fabrics.

[0058] Example 3, by increasing the foam layer content and expanding the perforation parameters, significantly improved breathability and softness while maintaining excellent tear resistance. This demonstrates that the technical solution of the present invention has good adjustability, enabling flexible optimization of other user experiences while ensuring tear resistance, thus meeting diverse customer needs.

[0059] In summary, this invention solves the defects of traditional PVC perforated leather by combining a "base fabric with a specific structure (island fiber open to form a three-dimensional mesh structure)" with a "perforated five-layer composite system".

[0060] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-strength composite tear-resistant perforated PVC artificial leather, characterized in that, The leather comprises, in sequence, a water-based coating (1), a PVC dense layer (2), a PVC foam layer (3), a PVC adhesive layer (4), and a base fabric layer (5); based on the total mass of the leather as 100%, the water-based coating (1) accounts for 1% to 5% of the mass, the PVC dense layer (2) accounts for 15% to 30% of the mass, the PVC foam layer (3) accounts for 15% to 35% of the mass, the PVC adhesive layer (4) accounts for 5% to 10% of the mass, and the base fabric layer (5) accounts for 15% to 35% of the mass. The base fabric layer (5) is a three-dimensional mesh structure base fabric formed by the intertwining of ultrafine fiber bundles formed by the opening of island fibers; Furthermore, the leather surface is perforated, and the perforation penetrates at least the water-based coating (1), the PVC dense layer (2), the PVC foam layer (3), and the PVC adhesive layer (4).

2. The high-strength composite tear-resistant perforated PVC artificial leather according to claim 1, characterized in that, Based on the mass ratio of the water-based coating (1), the raw material composition of the water-based coating (1) includes: 85%~95% water-based polyurethane, 1%~2% wetting agent and 1%~3% curing agent; The wetting agent is silicone resin; the curing agent is carbodiimide.

3. The high-strength composite tear-resistant perforated PVC artificial leather according to claim 1, characterized in that, Based on the mass ratio of the PVC dense layer (2), the raw material composition of the PVC dense layer (2) includes 35%~55% PVC resin, 30%~40% plasticizer, 1%~3% heat stabilizer, 5%~10% filler and 3%~8% colorant. The plasticizer is a phthalate. The heat stabilizer is a calcium-zinc stabilizer, which includes zinc stearate and calcium stearate. The filler is calcium carbonate, and the colorant includes organic and inorganic colorants. The organic colorant includes blue pigment and green pigment, and the inorganic colorant is titanium dioxide or carbon black.

4. The high-strength composite tear-resistant perforated PVC artificial leather according to claim 1, characterized in that, Based on the mass ratio of the PVC foam layer (3), the raw material composition of the PVC foam layer (3) includes: 40%~60% PVC resin, 30%~40% plasticizer, 1%~3% heat stabilizer, 1%~3% ADC foaming agent, 5%~10% flame retardant and 5%~10% filler. The plasticizer is phthalate, the heat stabilizer is calcium-zinc stabilizer, the calcium-zinc stabilizer includes zinc stearate and calcium stearate, the ADC foaming agent is azodicarbonamide, the flame retardant is antimony trioxide, and the filler is calcium carbonate.

5. The high-strength composite tear-resistant perforated PVC artificial leather according to claim 1, characterized in that, Based on the mass ratio of the PVC adhesive layer (4), the raw material composition of the PVC adhesive layer (4) includes 40%~60% PVC resin, 30%~40% plasticizer, 1%~3% heat stabilizer and 5%~10% filler; The plasticizer is a phthalate, the heat stabilizer is a calcium-zinc stabilizer, the calcium-zinc stabilizer includes zinc stearate and calcium stearate, and the filler is calcium carbonate.

6. The method for preparing high-strength composite tear-resistant perforated PVC artificial leather according to any one of claims 1 to 5, characterized in that, Includes the following steps: (1) Mixing: Prepare PVC dense layer slurry, PVC foam layer slurry and PVC adhesive layer slurry respectively; (2) Coating and lamination: The PVC dense layer slurry is coated onto the release paper and cured at a first temperature to form a PVC dense layer; a PVC foam layer slurry is coated onto the PVC dense layer and cured at a second temperature to form a PVC foam layer; a PVC adhesive layer slurry is coated onto the PVC foam layer and the base fabric layer is bonded together; after curing and bonding at a third temperature, the release paper is peeled off to obtain a semi-finished product; (3) Post-processing: A water-based coating is applied to the surface of the PVC dense layer of the semi-finished product by roller and dried, followed by embossing and perforation.

7. The method for preparing high-strength composite tear-resistant perforated PVC artificial leather according to claim 6, characterized in that, In step (2), The thickness of the PVC dense layer is 0.15~0.3mm, and the first temperature is 190~200℃; The thickness of the PVC foam layer is 0.2~0.5mm, and the second temperature is 160~180℃; The thickness of the PVC adhesive layer is 0.05~0.1mm, the thickness of the base fabric layer is 0.4~0.6mm, and the third temperature is 190~200℃.

8. The method for preparing high-strength composite tear-resistant perforated PVC artificial leather according to claim 6, characterized in that, In step (3), the thickness of the water-based coating is 3~5µm; the roller is 100~200 mesh; and the drying temperature is 130~150℃.

9. The method for preparing high-strength composite tear-resistant perforated PVC artificial leather according to claim 6, characterized in that, In step (3), the drilling process is carried out by mechanical drilling or laser drilling, and the hole diameter is 0.8mm~1mm and the hole spacing is 3mm~5mm.

10. The application of a high-strength composite tear-resistant perforated PVC artificial leather as described in any one of claims 1 to 5 in automotive interiors.

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