Tear-resistant PVC (polyvinyl chloride) composite vehicle tarpaulin, equipment, preparation method and application

Abstract

The invention belongs to the technical field of high polymer material composite tarpaulin, and particularly relates to tear-resistant PVC (polyvinyl chloride) composite vehicle tarpaulin, equipment, a preparation method and application. The tarpaulin for the vehicle is composed of base cloth and PVC films attached to the two sides of the base cloth through PVC slurry. Wherein the PVC slurry comprises the following materials: 100 parts of PVC paste resin, 90-120 parts of a plasticizer, 4-8 parts of an adhesive, 11-12 parts of a viscosity reducer and 25-35 parts of PVC calcium powder; the thickness of the PVC slurry permeating into the base cloth is less than or equal to 1 / 3 of the thickness of the base cloth. Vehicle tarpaulin manufacturing equipment is improved, the bottom film pressing wheel and the surface film pressing wheel are additionally arranged to improve attachment of a PVC film and a large cylinder, an original padding process is changed into a transfer sizing method by means of the modified transfer sizing wheel set, the sizing gram weight and screen cloth permeation can be reduced, and the production efficiency is improved. The tarpaulin tearing performance is improved; and the tarpaulin has good stripping resistance and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer material composite tarpaulins, and in particular relates to a tear-resistant PVC composite vehicle tarpaulin and equipment, a preparation method and uses thereof. Background Art

[0002] Tarpaulin is a waterproof material with high strength, good toughness and softness. Trucks, outdoor cargo, outdoor tents / tents, outdoor awnings, etc. all use this kind of material. The commonly used tarpaulin is a coated tarpaulin, which uses polyester mesh as the base fabric and PVC slurry to bond the PVC film to the surface of the base fabric. Among them, the PVC film: located on the surface of the tarpaulin, has good functions of isolating dirt, maintaining airtightness, and preventing rainwater leakage. It also has the performance of spraying, can absorb ink well, and presents brilliant colors. Polyester mesh is used as the supporting layer of the coated car tarpaulin. It is usually made of high-strength polyester fiber or other synthetic fibers, providing the necessary strength and stability to ensure the long-term use of the car tarpaulin in outdoor environments. PVC slurry is in the middle layer or lower layer of polyester mesh and PVC film, giving the product good adhesiveness, which can connect the two polar polymers of polyester and PVC film to form a stable structure, so that the PVC film can be bonded to the polyester mesh and will not fall off easily. The current tarpaulins have basically met the market demand in terms of sunshade and waterproofing, but the tearing performance of tarpaulins needs to be improved. In particular, customers in the European and American markets have higher requirements for the tearing performance of tarpaulins.

[0003] The existing technologies mostly rely on special tear-resistant agents, increasing the amount of adhesive, using special fiber base fabrics or changing the textile density of base fabrics to improve the tear resistance of tarpaulins. However, this will lead to an increase in the cost of tarpaulins and a higher gram weight. Chinese patent document CN114561814A provides a tear-resistant tarpaulin that uses polyethersulfone, plasticizers, etc., but requires additional potassium polymethylvinylsiloxane silanol to improve tear resistance with the help of potassium polymethylvinylsiloxane silanol. Chinese patent document CN110356080A provides a tear-resistant tarpaulin, but requires additional tear-resistant agents and tear-resistant layers, and does not disclose what kind of tear-resistant agents are used. Chinese patent documents CN113863003A, CN116084176A, etc. provide a variety of tear-resistant tarpaulins, but require the modification of the warp and weft of the base fabric, the addition of polymer modified fibers, glass fibers, or additional current treatment, which have higher tear resistance, but higher production costs and more complicated processes.

[0004] Under the premise of not increasing the complexity of the process and material costs, further improving the tear resistance of tarpaulins is an urgent problem to be solved in the tarpaulin industry. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a tear-resistant PVC composite vehicle tarpaulin and equipment, preparation method and use, so as to improve the tear resistance of the vehicle tarpaulin without increasing material costs, process difficulty, etc., and meet the performance requirements of vehicle tarpaulins in foreign countries such as the United States.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] First: The present invention provides a tear-resistant PVC composite vehicle tarpaulin, which comprises a base fabric, a PVC film and a PVC slurry, wherein the PVC film is bonded to the bottom and the surface of the base fabric through the PVC slurry; characterized in that the raw materials of the PVC slurry include the following materials by weight: 100 parts of PVC paste resin, 90-120 parts of plasticizer, 4-8 parts of adhesive, 11-12 parts of viscosity reducer and 25-35 parts of PVC calcium powder; the thickness of the PVC slurry infiltrated into the base fabric is less than or equal to 1 / 3 of the thickness of the base fabric.

[0008] Obviously, the thickness setting value of the PVC slurry infiltrating into the base fabric here belongs to the upper limit, and the lower limit of its thickness infiltrating into the base fabric should be 0, that is, the thickness X of the PVC slurry infiltrating into the base fabric is greater than 0 and less than or equal to 1 / 3 of the thickness of the base fabric.

[0009] Preferably, the PVC paste resin is selected from one or more of PB-50, P80, PSM-31, and C65V.

[0010] Preferably, the PVC paste resin is prepared by mixing PB-50 and PSM-31, and the weight ratio of PB-50 to PSM-31 is 4:1.

[0011] Preferably, the PVC paste resin is PSM-31.

[0012] Preferably, the PVC paste resin is prepared by mixing P80 and C65V, and the weight ratio of PB-50 and PSM-31 is 4:1.

[0013] Preferably, the plasticizer is selected from one or more of dimethyl phthalate (DMP), di-n-butyl phthalate (DBP), di-α-ethylhexyl phthalate (DEHP), dioctyl phthalate (DOP), diisononyl phthalate (DINP), and Mesamoll alkyl sulfonate plasticizers.

[0014] Preferably, the adhesive is selected from one or more of TP-53-552, N3300, TP-300, NP001, NP002, RG-901, and NP4042.

[0015] Preferably, the viscosity reducer is one or both of D-80 and D-60.

[0016] Preferably, the PVC calcium powder is selected from one or more of heavy calcium carbonate, light calcium carbonate, and ultra-white nano calcium.

[0017] Second: The present invention provides an equipment for preparing the aforementioned tear-resistant PVC composite vehicle tarpaulin, which is provided with a base cloth frame, a base cloth traction wheel, a base cloth guide wheel, a PVC slurry tank A, a PVC slurry tank B, an oven, a base film frame, a large vat A, a mask frame, and a large vat B in sequence according to the steps of base cloth traction, sizing, and PVC film laminating; the equipment also includes a transfer sizing wheel group A, a transfer sizing wheel group B, a base film pressing wheel, and a mask pressing wheel; the transfer sizing wheel group A and the transfer sizing wheel group B are both composed of a sizing wheel a arranged in the PVC slurry tank A or the PVC slurry tank B and a sizing wheel b in linear contact with the surface of the sizing wheel a; the base film pressing wheel and the mask pressing wheel are respectively arranged between the base film and the mask and the large vat A or the large vat B.

[0018] Among them, the slurry wheel a is used to dip PVC slurry from PVC slurry tank A or PVC slurry tank B to the wheel surface by means of a rotation process, and the slurry wheel b is used to transfer the PVC slurry carried on the wheel surface of the slurry wheel a to the surface of the base fabric by means of linear contact with the surface of the slurry wheel a by means of a rotation process.

[0019] Preferably, the sizing wheel a and the sizing wheel b are both 30-mesh wheels.

[0020] Preferably, large cylinder A and large cylinder B are 1500 large cylinder and 2000 large cylinder respectively.

[0021] Third: The present invention provides a method for preparing tear-resistant PVC composite vehicle tarpaulin using the above-mentioned equipment, comprising the following steps:

[0022] S1 Preparation of PVC slurry: PVC paste resin, plasticizer, viscosity reducer, and PVC calcium powder are stirred in a high-speed stirrer to obtain PVC slurry, cooled for 24 hours, pulled to the machine, and adhesive is added to mix to obtain PVC slurry;

[0023] S2 Preparation of vehicle tarpaulin: Place the base on the base fabric rack, place the PVC film on the bottom film rack and the surface film rack, and place the PVC slurry in the PVC slurry tank A and the PVC slurry tank B; start the unit to rotate the sizing wheel a to carry the PVC slurry from the PVC slurry tank A and the PVC slurry tank B, and then transfer the PVC slurry to the surface of the sizing wheel b through surface linear contact; rotate and fit the base fabric and the upper surface of the sizing wheel b to achieve transfer sizing; the sizing base fabric is dried in an oven; the bottom film and the surface film are pressed and bonded to the surfaces of the large cylinder A and the large cylinder B by the bottom film pressing wheel and the surface film pressing wheel respectively, and then the bottom film and the surface film are respectively bonded to the bottom side or the surface side of the base fabric through the surfaces of the large cylinder A and the large cylinder B by means of rotation, and roller pressing is performed to obtain the vehicle tarpaulin.

[0024] Fourth: The present invention provides the use of the aforementioned tear-resistant PVC composite vehicle tarpaulin in the preparation of vehicle covering products. The vehicle covering product refers to a covering used to cover the surface of a vehicle or its cargo temporarily or for a certain period of time. The vehicle includes a cargo truck, generally referred to as a cargo truck or truck, including a dump truck, a tractor truck, an off-road truck, etc., which belongs to the category of commercial vehicles and can be divided into heavy and light types according to the weight of the vehicle. Of course, the vehicle covering product can also be used as a cargo tarpaulin, used to cover and protect cargo outdoors such as docks.

[0025] The beneficial effects of the present invention are as follows:

[0026] The PVC slurry of the present invention reduces the amount of adhesive used, and combined with the improvement of the production process and equipment of the vehicle tarpaulin, can significantly improve the tear resistance of the vehicle tarpaulin and improve the durability of the vehicle tarpaulin.

[0027] The present invention improves the production process and equipment of vehicle tarpaulin, adds a pressing wheel on the surface of the large cylinder, so that the PVC film is better coated on the large cylinder and its pressing area is increased; at the same time, a transfer sizing wheel group is added, and the original dipping process is changed to a transfer sizing process, which reduces the penetration of PVC slurry into the base cloth and structural damage, makes the base cloth fibers slide better, and significantly improves its tear resistance.

[0028] In general, the present invention obtains a vehicle tarpaulin with good tear resistance and durability by adjusting the PVC slurry and improving the production process of the vehicle tarpaulin, which can meet the performance requirements of vehicle tarpaulin products in the European and American markets. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the layered structure of a vehicle tarpaulin in the prior art;

[0030] Figure 2 This is a schematic diagram of the layered structure of the vehicle tarpaulin of the present invention;

[0031] Figure 3 The process flow of the vehicle tarpaulin of the present invention is shown according to the relationship of manufacturing components;

[0032] In the figure, 1 is a PVC mask layer, 2 is a PVC bottom film layer, 3 is a base fabric layer; 4 is a PVC slurry layer, 5 is a base fabric traction wheel, 6 is a base fabric guide wheel, 7 is a PVC slurry tank A, 8 is a transfer sizing wheel group A, 9 is a PVC slurry tank B, 10 is a transfer sizing wheel group B, 11 is a bottom film pressing wheel, 12 is a mask pressing wheel, 13 is a sizing wheel a, 14 is a sizing wheel b, 15 is a base fabric rack, 16 is an oven, 17 is a bottom film rack, 18 is a mask rack, 19 is a large cylinder A, 20 is a large cylinder B, and 21 is a finished vehicle tarpaulin. DETAILED DESCRIPTION

[0033] The scheme and effects of the present invention are explained and illustrated in conjunction with specific embodiments. The embodiments are exemplary descriptions of the present invention and are not to be regarded as limiting the scope of protection of the present invention.

[0034] The terms "bottom" and "surface" used in the following examples are relative concepts, equivalent to the conventional terms "upper", "lower", "left" and "right", and are terms used to describe the position of the surface of a layered object. The PVC slurry tank A, PVC slurry tank B, and transfer sizing wheel group A, and transfer sizing wheel group B used in the following examples are relative concepts, representing that there are two corresponding devices. This is a description that is compatible with sizing on both sides of the base cloth, and does not represent that there are structural differences between the PVC slurry tank A and the PVC slurry tank B. As an exemplary choice, the base cloth model used in the following examples is 1000D20*20C18403. The materials used in the following examples are all commercially available materials.

[0035] Example 1 PVC slurry and preparation

[0036] This embodiment provides 6 kinds of PVC slurries, including one slurry of the prior art as comparative slurry 1 and 5 slurries of the present invention as experimental slurries 1 to 5. The ingredients of the PVC slurries are shown in Table 1.

[0037] Table 1 PVC slurry ingredients (parts by weight)

[0038]

[0039]

[0040] Preparation method of PVC slurry: According to the weight parts and materials in the ingredient list in Table 1, take PVC paste resin, plasticizer, viscosity reducer, and PVC calcium powder and stir them in a high-speed stirrer to obtain PVC slurry, cool it for 24 hours, pull it to the machine, add adhesive and mix it to obtain PVC slurry.

[0041] Example 2 PVC film and preparation

[0042] Since the main improvement of the vehicle tarpaulin of the present invention is not in the PVC film, this embodiment only provides a PVC film and preparation method for testing. The following PVC film is used as the base fabric covering layer of the vehicle tarpaulin. The PVC film and preparation method belong to the ingredients and preparation methods of the prior art, and the materials used are all commercially available materials. Commercially available PVC films can be directly used.

[0043] Table 2 PVC film ingredients (parts by weight)

[0044] Material Classification Dosage and material selection PVC resin 100 copies Plasticizers 58 copies (DOP) Stabilizer 2 parts (132 stabilizer) PVC calcium powder 30 parts (PVC special calcium) White color paste 5 copies (ATR-316)

[0045] Preparation method of PVC film: According to the weight parts and materials in the ingredient list in Table 2, PVC resin, plasticizer, stabilizer, PVC calcium powder and white color paste are stirred and mixed, conventionally extruded and plasticized, mixed in a rolling mill, impurities are filtered in a filter, and then mixed in a rolling mill, input into a rocking machine and a calender, calendered, drawn, embossed, and cooled to obtain a PVC film.

[0046] Example 3: Car tarpaulin and its preparation

[0047] Six kinds of PVC slurries were prepared according to the ingredients and method of Example 1; PVC films were prepared according to the ingredients and method of PVC films in Example 2, and PET mesh was used as the base fabric to prepare six kinds of vehicle tarpaulins.

[0048] Part I: Comparative Example 1 Structure and Preparation of Vehicle Tarpaulin

[0049] The vehicle tarpaulin of Comparative Example 1 has a structure layered structure as follows: Figure 1 As shown, 1 is the PVC mask layer; 2 is the PVC bottom film layer; 3 is the base fabric layer; and 4 is the PVC slurry layer, that is, the thickness of the PVC slurry layer penetrating into the base fabric layer exceeds 2 / 3 of the thickness of the base fabric layer, and even penetrates the entire base fabric layer.

[0050] The vehicle tarpaulin is a representative of the existing commercial vehicle tarpaulins, and the commercial vehicle tarpaulins can be used as a substitute for comparative testing. That is, in the preparation of the vehicle tarpaulin of comparative example 1, the PVC slurry adopts the traditional dipping process; when the PVC surface film layer 1 and the PVC bottom film layer 2 are introduced into the surface of the large cylinder, no corresponding PVC film pressing structure is additionally provided. The structure of the dipping process device of the equipment can be found in CN216825733U.

[0051] Part II: Vehicle tarpaulin structures, preparation equipment and methods of Experimental Examples 1 to 5

[0052] The vehicle tarpaulins of Experimental Examples 1 to 5 have structural layers as follows: Figure 2 As shown, 1 is the PVC surface film layer; 2 is the PVC bottom film layer; 3 is the base fabric layer; 4 is the PVC slurry layer. That is, the thickness of the PVC slurry layer penetrating into the base fabric layer is relatively shallow, and the thickness of the PVC slurry layer penetrating into the base fabric layer is less than or equal to 1 / 3 of the thickness of the base fabric layer.

[0053] The vehicle tarpaulins of Experimental Examples 1 to 5 were prepared by the following method:

[0054] 1. Manufacturing equipment: modified from existing equipment, such as Figure 3As shown, in the equipment, 5 is a base cloth traction wheel, 6 is a base cloth guide wheel, 7 is a PVC slurry tank A, 8 is a transfer sizing wheel group A, 9 is a PVC slurry tank B, 10 is a transfer sizing wheel group B, 11 is a bottom film pressing wheel, 12 is a surface mask pressing wheel, 13 is a sizing wheel a, 14 is a sizing wheel b, 15 is a base cloth rack, 16 is an oven, 17 is a bottom film rack, 18 is a surface mask rack, 19 is a large cylinder A, 20 is a large cylinder B, and 21 is a finished product of a vehicle tarpaulin.

[0055] The transfer sizing wheel group A, the transfer sizing wheel group B, the bottom film pressing wheel, and the face mask pressing wheel are devices added by structural modification, and the others are the original structures of commercially available equipment. Among them, the sizing wheel a is used to dip the PVC slurry from the slurry tank by rotation, and the sizing wheel b is in linear contact with the sizing wheel a (that is, the surfaces of the two wheels are in contact to form a contact line), so that the PVC slurry carried by the sizing wheel a is transferred to the surface of the base cloth by rotation. Among them, the bottom film pressing wheel and the face mask pressing wheel are used to better cover the PVC film on the upper and lower sides of the base cloth on the large cylinder, increase the pressing area, and thus improve the pressing effect. The sizing wheel a and the sizing wheel b are both 30-mesh wheels.

[0056] Obviously, the width and wheel spacing of the sizing wheel a, sizing wheel b, bottom film pressing wheel, and facial mask pressing wheel should meet the base fabric specifications or PVC film specifications. The sizing wheel a, sizing wheel b, bottom film pressing wheel, and facial mask pressing wheel used in this embodiment are cylindrical, with a rotating shaft fixed in the middle. The rotating shaft diameter is smaller than the main body of the wheel, which is common knowledge in this field. The sizing wheel a, sizing wheel b, bottom film pressing wheel, and facial mask pressing wheel can be manufactured using stainless steel or seamless steel pipes, and the wheel surface can be covered with an electroplating layer. The large cylinder A and large cylinder B can be selected from 1500 large cylinders and 2000 large cylinders respectively.

[0057] Obviously, for those skilled in the art, the manufacturing equipment is a device that pulls the base fabric through the upper surface of the sizing wheel b, the oven, the upper surface or side of the large cylinder A, and the lower surface or side of the large cylinder B in sequence, thereby achieving the sizing, drying, film laminating and other process steps. The diameter and speed settings of each wheel structure are not higher than common sense and can be adjusted.

[0058] 2. Preparation method: Please combine Figure 3 , wherein 21 is a finished product of a car tarpaulin, and the preparation method is as follows Figure 3 Proceed from left to right.

[0059] Place the base on the base fabric rack, take the PVC film of Example 2 and place it on the PVC face mask rack and the PVC bottom film rack respectively, and introduce the PVC slurry prepared in Example 1 into PVC slurry tank A and PVC slurry tank B.

[0060] Start the unit to make the transfer sizing wheel group A and the transfer sizing wheel group B carry the PVC slurry, transfer the PVC slurry to the surfaces of both sides of the base cloth through the sizing wheel b, dry it in an oven, increase the contact area between the PVC base film layer and the PVC surface film layer and the large cylinder A and the large cylinder B with the help of the base film pressing wheel and the surface film pressing wheel, adhere the PVC base film layer and the PVC surface film layer to the base cloth with the help of the large cylinder A and the large cylinder B, and press with rollers to obtain a car tarpaulin.

[0061] Example 4: Performance test of vehicle tarpaulin

[0062] The performance tests were performed on the vehicle tarpaulin of Comparative Example 1 prepared in Example 3 and the vehicle tarpaulins of Experimental Examples 1 to 5.

[0063] According to the DIN 53363 test method, the tear strength of 6 types of automotive tarpaulins was tested under the same conditions; according to the FZ / T 60039 test method, the peel strength of 6 types of automotive tarpaulins was tested under the same conditions; the tarpaulins were placed in the same normal temperature and humidity environment for 30 days as durability test samples for testing. The results are shown in Tables 3 and 4.

[0064] Table 3 Tear strength of 6 types of automotive tarpaulins (radial / latitudinal tear strength, N)

[0065]

[0066] From the results in Table 3, it can be seen that among the five types of vehicle tarpaulins, the tear strength of the vehicle tarpaulins of Experimental Examples 1-5 is higher than that of the vehicle tarpaulin of Comparative Example 1. Among them, the tear strength of the tarpaulins prepared from the PVC slurries of Experimental Examples 3-5 is higher than that of Experimental Examples 1 and 2.

[0067] Table 4 Peel strength of 6 types of automotive tarpaulins (radial / latitudinal tear strength, N)

[0068]

[0069]

[0070] It can be seen from the results in Table 4 that among the six types of vehicle tarpaulins, the anti-peeling effects of the vehicle tarpaulins of Experimental Examples 1 to 5 are close to that of the vehicle tarpaulin of Comparative Example 1, and no reduction in the anti-peeling effects is observed.

Claims

1. A tear-resistant PVC composite vehicle tarpaulin, comprising a base fabric, a PVC film and a PVC slurry, wherein the PVC film is bonded to the bottom side and the surface side of the base fabric through the PVC slurry; characterized in that: The raw materials of the PVC slurry include the following materials by weight: 100 parts of PVC paste resin, 90-120 parts of plasticizer, 4-8 parts of adhesive, 11-12 parts of viscosity reducer and 25-35 parts of PVC calcium powder; the thickness of the PVC slurry infiltrated into the base fabric is less than or equal to 1 / 3 of the thickness of the base fabric.

2. The tear-resistant PVC composite vehicle tarpaulin according to claim 1, characterized in that: The PVC paste resin is selected from one or more of PB-50, P80, PSM-31, and C65V.

3. The tear-resistant PVC composite vehicle tarpaulin according to claim 2, characterized in that: The PVC paste resin is prepared by mixing PB-50 and PSM-31, and the weight ratio of PB-50 to PSM-31 is 4:

1.

4. The tear-resistant PVC composite vehicle tarpaulin according to claim 2, characterized in that: The PVC paste resin is PSM-31.

5. The tear-resistant PVC composite vehicle tarpaulin according to claim 2, characterized in that: The PVC paste resin is prepared by mixing P80 and C65V, and the weight ratio of PB-50 and PSM-31 is 4:

1.

6. The tear-resistant PVC composite vehicle tarpaulin according to claim 1, characterized in that: The plasticizer is selected from one or more of DMP, DBP, DEHP, DOP, DINP, and Mesamoll alkyl sulfonate plasticizers.

7. The tear-resistant PVC composite vehicle tarpaulin according to claim 1, characterized in that: The adhesive is selected from one or more of TP-53-552, N3300, TP-300, NP001, NP002, RG-901, and NP4042.

8. The tear-resistant PVC composite vehicle tarpaulin according to claim 1, characterized in that: The viscosity reducer is one or both of D-80 and D-60.

9. The tear-resistant PVC composite vehicle tarpaulin according to claim 1, characterized in that: The PVC calcium powder is selected from one or more of heavy calcium carbonate, light calcium carbonate and ultra-white nano calcium.

10. An apparatus for preparing the tear-resistant PVC composite vehicle tarpaulin according to any one of claims 1 to 9, which is provided with a base fabric frame, a base fabric traction wheel, a base fabric guide wheel, a PVC slurry tank A, a PVC slurry tank B, an oven, a bottom film frame, a large tank A, a mask frame and a large tank B in sequence according to the steps of base fabric traction, sizing and PVC film lamination, characterized in that: The equipment also includes a transfer sizing wheel group A, a transfer sizing wheel group B, a base film pressing wheel and a facial mask pressing wheel; the transfer sizing wheel group A and the transfer sizing wheel group B are both composed of a sizing wheel a arranged in a PVC slurry tank A or a PVC slurry tank B and a sizing wheel b in linear contact with the surface of the sizing wheel a; the base film pressing wheel and the facial mask pressing wheel are respectively arranged between the base film and the facial mask and the large vat A or the large vat B.

11. The device according to claim 10, characterized in that The sizing wheel a and the sizing wheel b are both 30-mesh wheels.

12. The device according to claim 10, characterized in that The large cylinder A and large cylinder B are 1500 large cylinder and 2000 large cylinder respectively.

13. A method for preparing tear-resistant PVC composite vehicle tarpaulin using the equipment according to claim 10, characterized in that: The steps include: S1 Preparation of PVC slurry: PVC paste resin, plasticizer, viscosity reducer, and PVC calcium powder are stirred in a high-speed stirrer to obtain PVC slurry, cooled for 24 hours, pulled to the machine, and adhesive is added to mix to obtain PVC slurry; S2 Preparation of vehicle tarpaulin: Place the base on the base fabric rack, place the PVC film on the bottom film rack and the surface film rack, and place the PVC slurry in the PVC slurry tank A and the PVC slurry tank B; start the unit to rotate the sizing wheel a to carry the PVC slurry from the PVC slurry tank A and the PVC slurry tank B, and then transfer the PVC slurry to the surface of the sizing wheel b through linear surface contact; rotate and fit the base fabric to the upper surface of the sizing wheel b to achieve transfer sizing; the sizing-treated base fabric is dried in an oven; the bottom film and the surface film are pressed and bonded to the surfaces of the large cylinder A and the large cylinder B by the bottom film pressing wheel and the surface film pressing wheel respectively, and then the bottom film and the surface film are respectively bonded to the bottom side or the surface side of the base fabric through the surfaces of the large cylinder A and the large cylinder B by rotation, and roller pressing is performed to obtain the vehicle tarpaulin.

14. Use of the tear-resistant PVC composite vehicle tarpaulin according to any one of claims 1 to 9 or the tear-resistant PVC composite vehicle tarpaulin prepared by the preparation method according to claim 14 in preparing vehicle covering products.

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