PVC refrigerator panel, manufacturing method thereof and refrigerator

Abstract

The invention discloses a PVC refrigerator panel, a manufacturing method thereof and a refrigerator, and belongs to the field of refrigerator panel decoration. The PVC refrigerator panel comprises a base material layer, a color film layer, a wear-resistant layer and a UV coating, the base material layer is selected from a hard PVC plate, and raw materials for manufacturing the hard PVC plate comprise PVC, calcium carbonate, a stabilizer, internal and external lubricants, glass short fibers, a stiffening modifier and a coloring agent; and the stiffening modifier is selected from a high-performance acrylic acid-based composite modified material synthesized by a methacrylic acid emulsion copolymerization method. The invention is applied to the aspect of refrigerator panel decoration, and has the characteristics of environmental protection, water resistance, fire resistance, stain resistance, bacteria resistance, scratch resistance, good stability, excellent mechanical properties, wide pattern selection and embossing texture selection range, customization realization, mature process and low cost, and the thickness of the panel can be as thin as 2 MM, and the bending strength can reach more than 25 MPA.

Description

Technical Field

[0001] The invention belongs to the field of refrigerator panel decoration, and in particular relates to a PVC refrigerator panel, a manufacturing method thereof, and a refrigerator. Background Art

[0002] With the rapid development of the times, consumer demand for home appliances is also changing, from the initial functional rigid demand to gradually developing differentiated and personalized needs. Traditional home appliance surface decorative panels are mainly divided into two categories: glass and steel.

[0003] Glass materials have a unique texture and can be combined with screen printing and surface coating to create differentiated glass appearance effects, making them popular among consumers and widely used in the surface decoration of mid-to-high-end home appliances. They have good physical and chemical properties and can produce deep 3D textures on the surface (above 100μm). However, glass panels also have problems such as single effects, high costs, and difficult processing. VCM panels made of steel plates using gravure printing, coating, and composite processes have rich and varied structures, can achieve fine printing texture effects and rich metallic texture effects, and are easy to produce and process at low costs. They are widely used in the surface decoration of refrigerators. Steel plates have good processing performance, delicate product printing effects, a variety of surface treatment effects (high gloss / matte / micro-texture), and a variety of metallic appearance effects (stainless steel appearance, titanium metal appearance, etc.). They are low in cost, but steel plates cannot produce a deep 3D surface feel.

[0004] The above two materials have been developed in the field of refrigerator surface decoration for more than ten years. The characteristics and limitations of the products are relatively fixed, and there has been no breakthrough in the appearance effect. Therefore, the market urgently needs a new type of refrigerator decorative panel material with a breakthrough appearance, delicate and rich, low cost, and rich 3D touch. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention proposes a PVC refrigerator panel, a manufacturing method thereof, and a refrigerator that are green and environmentally friendly, waterproof, fireproof, anti-fouling, antibacterial, scratch-resistant, stable, and have excellent mechanical properties. The panel thickness can be as thin as 2MM, the bending strength can reach more than 25MPA, and the color and embossed texture selection range is wide and can be customized. The process is mature and the cost is low.

[0006] In order to solve the technical problem, the technical solution adopted by the present invention is:

[0007] On one hand, the present invention provides a PVC refrigerator panel, which includes a substrate layer, a color film layer, a wear-resistant layer and a UV coating; the substrate layer is selected from a rigid PVC board, and the raw materials for manufacturing the rigid PVC board include PVC, calcium carbonate, a stabilizer, internal and external lubricants, short glass fibers, a stiffening modifier, and a colorant; the stiffening modifier is selected from a high-performance acrylic-based composite modified material synthesized by a methacrylic acid emulsion copolymerization method.

[0008] Preferably, the stiffness-enhancing modifier is selected from Wintech's K12.

[0009] Preferably, the glass staple fibers are selected from ECS13-6.0-552 of Jushi, the stabilizer is selected from MW397 of KD chem, and the lubricant is selected from SA1801 of Fengyi.

[0010] Preferably, in parts by weight, the PVC is selected from any value between 30 and 100 parts, the calcium carbonate is selected from any value between 100 and 200 parts, the lubricant is selected from any value between 1 and 10 parts, the stabilizer is selected from any value between 1 and 15 parts, the glass staple is selected from any value between 2 and 5 parts, and the stiffening modifier is selected from any value between 2 and 10 parts.

[0011] Preferably, the UV coating is obtained by applying a composite antibacterial and antifouling coating at a coating amount of any value between 6 and 22 g / m2; the wear-resistant layer is selected from a PVC transparent wear-resistant sheet; and the color film layer is selected from a PVC printed color film.

[0012] Preferably, the thickness of the wear-resistant layer is selected from any value within the range of 0.1-0.3 mm; the thickness of the color film layer is selected from any value within the range of 0.05-0.1 mm; and the thickness of the substrate layer is selected from any value within the range of 2-7 mm.

[0013] Another aspect of the present invention provides a method for manufacturing a PVC refrigerator panel as described in any of the above technical solutions, comprising a step of preparing a substrate layer, and a step of using a hot pressing process to composite the substrate layer, the color film layer, the wear-resistant layer and the UV coating to form the PVC refrigerator panel.

[0014] Preferably, the substrate layer preparation step includes: first hot mixing the PVC, the calcium carbonate, the stabilizer, the internal and external lubricants, the glass staple, the stiffness modifier, and the colorant, the hot mixing temperature is any value between 120-180°C, and the hot mixing time is any value between 20-30min; then cold mixing, the cold mixing temperature is less than 50°C; using a twin-screw extruder to directly extrude the mixed powder, the temperature of the screw area is any value between 150-210°C, and the temperature of entering the confluence core is any value between 180-250°C, and the plate is rolled to a specified size through a mold and a calendering roller to obtain the substrate layer.

[0015] Preferably, the wear-resistant layer and the color film layer are cross-linked to the surface of the substrate layer in combination with an online lamination process to form a semi-finished composite layer. The semi-finished composite layer is then subjected to UV coating after curing. The resulting plate enters the painting line after curing, first passes through a primer paint roller with a coating amount of 5-15g, and then undergoes UV curing with an energy of 250-400mJ / cm 2 , then pass through the topcoat paint roller, the coating amount is 5-15g, and the UV curing energy is 700-1000mJ / cm 2 , and add antibacterial agents and antifouling agents to the primer and topcoat, and perform chamfering and milling according to the final panel size requirements to form the final product.

[0016] The present invention also provides a refrigerator, comprising the PVC refrigerator panel described in any one of the above technical solutions.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a PVC refrigerator panel. This panel is not only environmentally friendly and 100% recyclable, but also has multiple functions such as waterproof, fireproof, anti-fouling, antibacterial, and scratch-resistant. It has good stability and excellent mechanical properties. The panel thickness can be as thin as 2mm, and the bending strength can reach above 25MPA. It also has a wide range of color and embossed texture options and can be customized. The process is mature and the cost is low. It is an ideal alternative material for existing glass, steel plate and other high-energy consumption panel products with single color and texture.

[0019] The present invention provides a method for manufacturing a PVC refrigerator panel. A modified rigid PVC board is used as a substrate. The rigid PVC substrate is laminated with a PVC multi-layer composite decorative film through a hot pressing process, thereby producing a variety of appearance patterns (printing effect, pearlescent effect, metallic effect, etc.). During the hot pressing lamination process, a mirror roller pressing method or an embossing roller pressing method can be selected to respectively achieve a high-gloss flat surface and a three-dimensional appearance effect of the product. Finally, a layer of UV curing coating is applied to the surface of the product to protect the surface of the product and improve the surface physical and chemical properties of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the layer structure of a PVC refrigerator panel provided by an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the appearance of a PVC refrigerator panel provided by an embodiment of the present invention;

[0022] Figure 3 This is a flow chart of the molding process of a PVC refrigerator panel provided by an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the interpenetrating network structure of materials provided in an embodiment of the present invention;

[0024] In the above figures: 1. UV coating; 2. Wear-resistant layer; 3. Color film layer; 4. Base material layer. DETAILED DESCRIPTION

[0025] The following is a detailed and complete description of the technical solutions in specific embodiments of the present invention, with reference to the accompanying drawings. It should be understood that the described embodiments are merely partial implementations of the overall technical solution of the present invention, and are not exhaustive. All other embodiments derived by those skilled in the art based on the overall concept of the present invention are intended to fall within the scope of protection of the present invention.

[0026] On the one hand, the present invention provides a PVC refrigerator panel, such as Figure 1 As shown, the PVC refrigerator panel includes a base material layer 4, a color film layer 3, a wear-resistant layer 2, and a UV coating 1; the base material layer 4 is selected from a rigid PVC board, and the raw materials for manufacturing the rigid PVC board include PVC, calcium carbonate, stabilizer, internal and external lubricants, glass short fibers, a stiffening modifier, and a colorant; the stiffening modifier is selected from a high-performance acrylic base composite modified material synthesized by methacrylic acid emulsion copolymerization. Figure 2As shown, it is not only green and environmentally friendly and 100% recyclable, but also has multiple functions such as waterproof, fireproof, anti-fouling, antibacterial and scratch-resistant. It has good stability and excellent mechanical properties. The panel thickness can be as thin as 2MM, and the bending strength can reach more than 25MPA. It has a wide range of color and embossed texture options and can be customized. It has mature technology and low cost. It is an ideal alternative material for existing glass, steel plates and other high-energy consumption, single-color and texture panel products. This technical solution specifically limits the types of stiffening modifiers because the additive overcomes the defects of traditional PVC processing aids such as ACR and CPE in improving the bending strength of PVC performance. It can not only improve the interfacial compatibility with PVC, but also bind to the particle surface in the form of multi-point anchoring through the intervention of hyperdispersants, while strengthening the bonding force between particles through grafting chains, thereby having excellent bonding performance and significantly improving the deformation resistance and bending strength of PVC composite materials. The stiffening material combines the interpenetrating network toughening and ion lattice topological toughening characteristics of CPE, so that while increasing the bending strength, rigidity, elastic modulus, and Vicat softening point of PVC, it can also allow PVC products to obtain good bending strength while ensuring product toughness and hardness.

[0027] In a preferred embodiment, the stiffness-enhancing modifier is selected from Winitek's K12; the glass staple is selected from Jushi's ECS13-6.0-552, the stabilizer is selected from KD chem's MW397, and the lubricant is selected from Wilmar's SA1801. Among them, the glass staple can effectively increase the strength and stiffness of the PVC sheet. These fibers can form a three-dimensional network structure in PVC, further enhancing the rigidity and bending resistance of the PVC sheet; the stabilizer reacts with the chlorine atoms or free radicals in the PVC molecular chain to prevent or slow down the thermal decomposition or oxidation reaction of the PVC molecular chain, thereby improving the thermal stability and durability of the PVC sheet; the lubricant mainly reduces the friction of the PVC sheet during processing by forming a lubricating film between the PVC molecular chains or reducing the surface adhesion. The present invention improves the interfacial activity of PVC and improves the compatibility between raw materials by limiting the specific types of stiffness-enhancing modifiers and other components, so that the combination of other additives with PVC is more direct, forming a Figure 4 The interpenetrating network structure shown can better play its role and improve its efficiency in the processing process. Specifically, it can increase the tensile strength of the plate by 41%, the impact strength of the plate by 43%, the bending strength of the plate by 40%, the bending modulus of the plate by 23%, and the Vicat softening point temperature of the plate by 24%.

[0028] In a preferred embodiment, in parts by weight, the PVC is selected from any value between 30 and 100 parts, the calcium carbonate is selected from any value between 100 and 200 parts, the lubricant is selected from any value between 1 and 10 parts, the stabilizer is selected from any value between 1 and 15 parts, the glass staple is selected from any value between 2 and 5 parts, and the stiffening modifier is selected from any value between 2 and 10 parts. This technical solution specifically defines the amounts of PVC, calcium carbonate, lubricant, stabilizer, glass staple, and stiffening modifier. It is understandable that the amount of PVC can also be 40 parts, 50 parts, 60 parts, 70 parts, 80 parts, 90 parts, and any value within their ranges, the amount of calcium carbonate can also be 110 parts, 120 parts, 130 parts, 140 parts, 150 parts, 160 parts, 170 parts, 180 parts, 190 parts, and any value within their ranges, and the amount of lubricant can also be 2 The amount of the stabilizer can be 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts and any value therein, the amount of the glass staple can also be 3 parts, 4 parts and any value therein, and the amount of the stiffness modifier can also be 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts and any value therein.

[0029] In a preferred embodiment, the UV coating 1 is obtained by applying a composite antibacterial and antifouling coating at a coating amount of any value between 6 and 22 g / m2; the wear-resistant layer 2 is selected from a PVC transparent wear-resistant sheet; and the color film layer 3 is selected from a PVC printed color film.

[0030] In a preferred embodiment, the thickness of the wear-resistant layer 2 is selected from any value between 0.1 and 0.3 mm; the thickness of the color filter layer 3 is selected from any value between 0.05 and 0.1 mm; and the thickness of the substrate layer 4 is selected from any value between 2 and 7 mm. This technical solution specifically defines the thicknesses of the wear-resistant layer 2, the color filter layer 3, and the substrate layer 4. It is understood that the thickness of the wear-resistant layer 2 can also be 0.2 mm, the thickness of the color filter layer 3 can also be 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, or any value therein, and the thickness of the substrate layer 4 can also be 5 mm, 6 mm, or any value therein.

[0031] Another aspect of the present invention provides a method for manufacturing a PVC refrigerator panel according to any of the above technical solutions, comprising a step of preparing a substrate layer 4, and a step of using a hot pressing process to composite the substrate layer 4, the color film layer 3, the wear-resistant layer 2, and the UV coating 1 to form the PVC refrigerator panel. In a preferred embodiment, the step of preparing the substrate layer 4 comprises: first hot mixing the PVC, the calcium carbonate, the stabilizer, the internal and external lubricants, the glass short fibers, the stiffening modifier, and the colorant, wherein the hot mixing temperature is any value between 120-180°C and the hot mixing time is any value between 20-30 minutes; then cold mixing is performed, wherein the cold mixing temperature is less than 50°C; the mixed powder is directly extruded using a twin-screw extruder, wherein the temperature of the screw region is any value between 150-210°C and the temperature of the confluence core is any value between 180-250°C, and the sheet is rolled to a specified size through a mold and a calendering roller to obtain the substrate layer 4.

[0032] In a preferred embodiment, the wear-resistant layer 2 and the color film layer 3 are cross-linked to the surface of the substrate layer 4 in combination with an online lamination process to form a semi-finished composite layer. The semi-finished composite layer is then subjected to UV coating after curing. The resulting plate enters the painting line after curing, first passes through a primer paint roller with a coating amount of 5-15g, and then is UV cured with an energy of 250-400mJ / cm 2 , then pass through the topcoat paint roller, the coating amount is 5-15g, and the UV curing energy is 700-1000mJ / cm 2 , and add antibacterial agents and antifouling agents to the primer and topcoat, and perform chamfering and milling according to the final panel size requirements to form the final finished product. It can be understood that the curing in this technical solution is also called maturation.

[0033] The above method uses the modified rigid PVC board as the substrate, and simultaneously laminates the rigid PVC substrate with the PVC multi-layer composite decorative film through a hot pressing process, thereby producing a variety of appearance patterns (printing effect, pearlescent effect, metallic effect, etc.). During the hot pressing process, mirror roller pressing or embossing roller pressing can be selected to achieve high-gloss flat and three-dimensional appearance effects of the product, respectively. Finally, a layer of UV curing coating is applied on the surface of the product to protect the surface of the product and improve the surface physical and chemical properties of the product. Specifically, PVC panels adopt the processes of extrusion, calendering, printing, hot pressing and coating, organically combining the advantages of glass panels and VCM panels. The product has the excellent texture of glass and has a more delicate and rich printing effect. The surface of the product can also be matched with a deeper 3D touch effect; PVC panel production adopts PVC extrusion molding, color film attachment, embossing molding, and surface treatment online processing technology to complete the entire process at one time, with good productivity and cost advantages. The production process adopts hot pressing board technology and does not use adhesive materials, which is more in line with environmental protection requirements; PVC panels are the third type of refrigerator decorative panel materials other than steel panels and glass panels. They will achieve a breakthrough in differentiated appearance effects in the direction of refrigerator panels. While improving the appearance effect, the production link also has a more obvious carbon reduction effect, which is in line with the development direction of low-carbon emission reduction.

[0034] The present invention also provides a refrigerator, comprising the PVC refrigerator panel described in any one of the above technical solutions.

[0035] In order to more clearly and in detail introduce the PVC refrigerator panel, its manufacturing method and refrigerator provided by the embodiments of the present invention, they will be described below in conjunction with specific embodiments.

[0036] Example 1

[0037] The raw material formula of rigid PVC board includes:

[0038] 50 parts of PVC, 150 parts of calcium carbonate, 4 parts of stabilizer, 0.8 parts of lubricant G60, 0.8 parts of PE wax, 3 parts of stiffening modifier, and 2 parts of glass fiber.

[0039] The manufacturing process includes:

[0040] PVC, calcium carbonate, stabilizer, internal and external lubricants, glass staple, stiffness modifier, and colorant are first hot-mixed at a temperature of 120°C for 30 minutes; then cold-mixed at a temperature of less than 50°C; the mixed powder is directly extruded using a twin-screw extruder, with the temperature in the screw region at 150°C and the temperature before entering the confluence core at 250°C. The sheet is then passed through a die and calendered to a specified size to obtain substrate layer 4;

[0041] Combined with the online lamination process, the wear-resistant layer 2 and the color film layer 3 are cross-linked to the surface of the substrate layer 4 to form a semi-finished composite layer. The semi-finished composite layer is then cured and then UV coated. After curing, the obtained board enters the painting line and first passes through a primer paint roller with a coating amount of 5g, and then undergoes UV curing with an energy of 250mJ / cm 2 , then pass through the topcoat paint roller, the coating amount is 15g, and the UV curing energy is 1000mJ / cm 2 , and add antibacterial agents and antifouling agents to the primer and topcoat, and perform chamfering and milling according to the final panel size requirements to form the final product.

[0042] Example 2

[0043] The raw material formula of rigid PVC board includes:

[0044] 50 parts of PVC, 150 parts of calcium carbonate, 4 parts of stabilizer, 0.8 parts of lubricant G60, 0.8 parts of PE wax, 4 parts of stiffness modifier, and 2 parts of glass fiber.

[0045] The manufacturing process includes:

[0046] PVC, calcium carbonate, stabilizer, internal and external lubricants, glass staple, stiffness modifier, and colorant are first hot-mixed at a temperature of 180°C for 20 minutes; then cold-mixed at a temperature of less than 50°C; the mixed powder is directly extruded using a twin-screw extruder, with the temperature in the screw region at 210°C and the temperature before entering the confluence core at 180°C. The sheet is then passed through a die and calendered to a specified size to obtain substrate layer 4;

[0047] Combined with the online lamination process, the wear-resistant layer 2 and the color film layer 3 are cross-linked to the surface of the substrate layer 4 to form a semi-finished composite layer. The semi-finished composite layer is then cured and then subjected to UV coating. After curing, the resulting board enters the painting line, first passes through a primer paint roller with a coating amount of 15g, and then is UV cured with an energy of 400mJ / cm 2 , then passed through the topcoat paint roller, the coating amount was 5g, and the UV curing energy was 700mJ / cm 2 , and add antibacterial agents and antifouling agents to the primer and topcoat, and perform chamfering and milling according to the final panel size requirements to form the final product.

[0048] Example 3

[0049] The raw material formula of rigid PVC board includes:

[0050] 50 parts of PVC, 175 parts of calcium carbonate, 4 parts of stabilizer, 1 part of lubricant G60, 1.1 parts of PE wax, 3 parts of stiffening modifier, and 2 parts of glass fiber.

[0051] The manufacturing process includes:

[0052] PVC, calcium carbonate, stabilizer, internal and external lubricants, glass staple, stiffness modifier, and colorant are first hot-mixed at a temperature of 150°C for 25 minutes; then cold-mixed at a temperature of less than 50°C; the mixed powder is directly extruded using a twin-screw extruder, with the temperature in the screw region at 200°C and the temperature before entering the confluence core at 200°C. The sheet is then passed through a die and calendered to a specified size to obtain substrate layer 4;

[0053] Combined with the online lamination process, the wear-resistant layer 2 and the color film layer 3 are cross-linked to the surface of the substrate layer 4 to form a semi-finished composite layer. The semi-finished composite layer is then cured and then subjected to UV coating. After curing, the obtained board enters the painting line and first passes through a primer paint roller with a coating amount of 10g, and then is UV cured with an energy of 300mJ / cm 2 , then passed through the topcoat paint roller, the coating amount was 10g, and the UV curing energy was 850mJ / cm 2 , and add antibacterial agents and antifouling agents to the primer and topcoat, and perform chamfering and milling according to the final panel size requirements to form the final product.

[0054] Example 4

[0055] The raw material formula of rigid PVC board includes:

[0056] 50 parts of PVC, 175 parts of calcium carbonate, 5 parts of stabilizer, 1 part of lubricant G60, 1.1 parts of PE wax, 4 parts of stiffness modifier, and 2 parts of glass fiber.

[0057] The manufacturing process includes:

[0058] PVC, calcium carbonate, stabilizer, internal and external lubricants, glass staple, stiffness modifier, and colorant are first hot-mixed at a temperature of 180°C for 30 minutes; then cold-mixed at a temperature of less than 50°C; the mixed powder is directly extruded using a twin-screw extruder, with the temperature in the screw region at 210°C and the temperature before entering the confluence core at 250°C. The sheet is then passed through a die and calendered to a specified size to obtain substrate layer 4;

[0059] Combined with the online lamination process, the wear-resistant layer 2 and the color film layer 3 are cross-linked to the surface of the substrate layer 4 to form a semi-finished composite layer. The semi-finished composite layer is then cured and then subjected to UV coating. After curing, the resulting board enters the painting line, first passes through a primer paint roller with a coating amount of 15g, and then is UV cured with an energy of 400mJ / cm 2 , then pass through the topcoat paint roller, the coating amount is 15g, and the UV curing energy is 1000mJ / cm 2, and add antibacterial agents and antifouling agents to the primer and topcoat, and perform chamfering and milling according to the final panel size requirements to form the final product.

[0060] like Figure 3 As shown, the manufacturing process of the PVC refrigerator panel in the above embodiment described in combination with the molding equipment includes:

[0061] (1) Adding materials: Add the raw materials of the base material layer 4 in proportion into a mixer and stir them in a sealed manner at room temperature to ensure that the raw materials are evenly mixed.

[0062] (2) Raw material mixing: The low-speed mixer is heated to about 170°C using steam, and two rollers are rotated inward to pressurize and mix the softened material blocks sent in from the previous process. The material temperature is raised to about 175°C and then sent to the calender via a swing conveyor.

[0063] (3) Calendering: The working principle and conditions are the same as those of the low-speed mixer. The calender has three rollers, which are used to produce sheets with fixed width, fixed thickness and higher density, so that the products can better meet the quality requirements.

[0064] (4) Film composite: Heat the calendered sheet (150-160°C) and heat-press it with the pre-prepared PVC decorative film. Use an embossing roller to give the product a rich surface 3D effect during the lamination process.

[0065] (5) Surface treatment: UV protective coating is applied to the surface of the coated coil.

[0066] (6) Trimming packaging: Use CNC cutting machine to cut into required specifications and sizes

[0067] Performance Testing

[0068] The average data of performance test after extrusion molding are shown in Table 1.

[0069] Table 1 Performance test data of Examples 1-4

[0070]

[0071] The performance data of the 2MM board prepared according to Example 4 are compared with the performance of conventional PVC boards, as shown in Table 2.

[0072] Table 2 Performance comparison results

[0073]

[0074]

Claims

1. A PVC refrigerator panel, characterized in that: The PVC refrigerator panel includes a base material layer, a color film layer, a wear-resistant layer and a UV coating; the base material layer is selected from a rigid PVC board, and the raw materials for manufacturing the rigid PVC board include PVC, calcium carbonate, a stabilizer, internal and external lubricants, short glass fibers, a stiffening modifier, and a colorant; the stiffening modifier is selected from a high-performance acrylic-based composite modified material synthesized by a methacrylic acid emulsion copolymerization method.

2. The PVC refrigerator panel according to claim 1, characterized in that: The stiffness-enhancing modifier is selected from Wintech's K12.

3. The PVC refrigerator panel according to claim 1, characterized in that: The glass staple fibers are selected from ECS13-6.0-552 of Jushi, the stabilizer is selected from MW397 of KD chem, and the lubricant is selected from SA1801 of Fengyi.

4. The PVC refrigerator panel according to claim 1, characterized in that: In parts by weight, the PVC is selected from any value between 30 and 100 parts, the calcium carbonate is selected from any value between 100 and 200 parts, the lubricant is selected from any value between 1 and 10 parts, the stabilizer is selected from any value between 1 and 15 parts, the glass staple is selected from any value between 2 and 5 parts, and the stiffening modifier is selected from any value between 2 and 10 parts.

5. The PVC refrigerator panel according to claim 1, characterized in that: The UV coating is obtained by applying a composite antibacterial and antifouling coating at a coating amount of 6-22 g / m2; the wear-resistant layer is selected from a PVC transparent wear-resistant sheet; and the color film layer is selected from a PVC printed color film.

6. The PVC refrigerator panel according to claim 5, characterized in that: The thickness of the wear-resistant layer is selected from any value within the range of 0.1-0.3 mm; the thickness of the color film layer is selected from any value within the range of 0.05-0.1 mm; and the thickness of the substrate layer is selected from any value within the range of 2-7 mm.

7. The method for manufacturing a PVC refrigerator panel according to any one of claims 1 to 6, characterized in that: The method comprises the steps of preparing a substrate layer and compounding the substrate layer, the color film layer, the wear-resistant layer and the UV coating layer to form the PVC refrigerator panel by adopting a hot pressing process.

8. The method for manufacturing a PVC refrigerator panel according to claim 7, characterized in that: The base material layer preparation step includes: first hot mixing the PVC, the calcium carbonate, the stabilizer, the internal and external lubricants, the glass staple, the stiffness modifier, and the colorant, wherein the hot mixing temperature is any value between 120-180°C and the hot mixing time is any value between 20-30 minutes; then cold mixing is performed, wherein the cold mixing temperature is less than 50°C; directly extruding the mixed powder using a twin-screw extruder, wherein the temperature of the screw area is any value between 150-210°C and the temperature of the confluence core is any value between 180-250°C, and the plate is rolled to a specified size through a mold and a calendering roller to obtain the base material layer.

9. The method for manufacturing a PVC refrigerator panel according to claim 8, characterized in that: Combined with the online lamination process, the wear-resistant layer and the color film layer are cross-linked to the surface of the substrate layer to form a semi-finished composite layer. The semi-finished composite layer is then subjected to UV coating after curing. The resulting board enters the painting line after curing, first passes through a primer paint roller with a coating amount of 5-15g, and then is UV cured with an energy of 250-400mJ / cm 2 , then pass through the topcoat paint roller, the coating amount is 5-15g, and the UV curing energy is 700-1000mJ / cm 2 , and add antibacterial agents and antifouling agents to the primer and topcoat, and perform chamfering and milling according to the final panel size requirements to form the final product.

10. A refrigerator, characterized in that: The refrigerator comprises the PVC refrigerator panel according to any one of claims 1 to 6.

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