ABS sheet and preparation method thereof, door body and door panel and preparation method thereof

Abstract

The present application provides an ABS sheet and a preparation method thereof, a door body and a preparation method thereof, wherein the ABS sheet is prepared from the following raw materials in parts by weight: 100 parts of ABS resin, 10-40 parts of heavy calcium carbonate, 10-40 parts of nano calcium carbonate, 1-3 parts of calcium stearate, 1-3 parts of stearic acid, 0.5-3 parts of polyethylene wax, and 0.5-3 parts of antioxidant; the door body and door panel include a UV coating, a color film pattern layer, and an ABS sheet. This solves the problem of self-explosion of tempered glass panels and poor rigidity of metal panels.

Description

Technical Field

[0001] The present application relates to the field of refrigerator door bodies, and in particular to an ABS board and a preparation method thereof, a door body and a door panel and a preparation method thereof. Background Art

[0002] The materials of refrigerator panels are mainly tempered glass and metal panels. Among them, the tempered glass panel is a flat structure. The color and pictures on the panel are realized by printing. The surface is chemically corroded or embossed to obtain a textured touch. The metal panel is thin, easy to deform, and has poor flatness. A certain structure of the panel can be obtained through stamping. The metal panel material is divided into PCM board and VCM board. PCM board is a pre-sprayed panel with a lower overall texture. VCM board is a coated steel plate, which can obtain a variety of appearances through the coating process.

[0003] The thickness of metal panels is thin, generally 0.4-0.6mm, with poor rigidity and easy to be dented under gravity impact. For large-sized panels, when the refrigerator door is foamed, in order to reduce the possibility of panel shrinkage caused by the shrinkage of the foaming layer, a protective layer of felt or other materials is added to the back of the panel before the door is foamed, which increases the manufacturing cost. In addition, it is difficult for metal panels to achieve a high-touch texture.

[0004] After being processed, tempered glass panels can have a high-quality appearance, good rigidity, and no need to add a protective layer. However, due to technological limitations, tempered glass has a certain self-explosion rate, poor impact resistance, and the price of glass panels is relatively high. Summary of the invention

[0005] The present application provides an ABS plate and a preparation method thereof, a door body and a preparation method thereof, so as to solve the problems of self-explosion of tempered glass panels and poor rigidity of metal panels.

[0006] In a first aspect, the present application provides an ABS sheet, which is prepared by including the following raw materials in parts by weight: 100 parts of ABS resin, 10-40 parts of heavy calcium carbonate, 10-40 parts of nano calcium carbonate, 1-3 parts of calcium stearate, 1-3 parts of stearic acid, 0.5-3 parts of polyethylene wax, and 0.5-3 parts of antioxidant.

[0007] Optionally, 1-4 parts of masterbatch are also included.

[0008] In a second aspect, the present application provides a door body and door panel, including a UV coating, a color film pattern layer and the ABS board described in the first aspect.

[0009] Optionally, the color film pattern layer is a PET film or a PVC film, and the thickness of the color film pattern layer is 0.05-0.13 mm.

[0010] Optionally, the thickness of the ABS sheet is 2-4 mm.

[0011] In a third aspect, the present application provides a method for preparing an ABS sheet, which is used to prepare the ABS sheet described in the first aspect, comprising:

[0012] 100 parts of ABS resin, 10-40 parts of heavy calcium carbonate, 10-40 parts of nano calcium carbonate, 1-3 parts of calcium stearate, 1-3 parts of stearic acid, 0.5-3 parts of polyethylene wax, and 0.5-3 parts of antioxidant, respectively weighed, are placed in a mixer and fully mixed to obtain a mixture;

[0013] The mixture is placed in a single screw extruder to obtain an ABS sheet.

[0014] Optionally, the temperature of the mixer is 60-80° C., and the mixing time is 10-20 minutes.

[0015] Optionally, the temperature of the single screw extruder is 180-230°C, the rotation speed is 400-650r / min, and the extrusion time is 5-20 minutes.

[0016] In a fourth aspect, the present application provides a method for preparing a door body and door panel, which is used to prepare the door body and door panel described in the third aspect, the method comprising: combining a color film pattern layer with an ABS sheet by heat lamination to obtain an ABS sheet with a pattern;

[0017] The ABS sheet with the pattern is pressed by a shaping roller to obtain a pressed ABS sheet;

[0018] Cooling and shaping the pressed ABS sheet and then cutting it to obtain a cut ABS sheet;

[0019] The cut ABS sheet is treated with a UV coating to obtain a door body and a door panel.

[0020] It can be seen from the above technical scheme that the present application provides an ABS sheet and a preparation method thereof, a door body and a preparation method thereof. The ABS sheet is prepared by including the following raw materials in parts by weight: 100 parts of ABS resin, 10-40 parts of heavy calcium carbonate, 10-40 parts of nano calcium carbonate, 1-3 parts of calcium stearate, 1-3 parts of stearic acid, 0.5-3 parts of polyethylene wax, and 0.5-3 parts of antioxidant; the door body and door panel include a UV coating, a color film pattern layer and an ABS sheet.

[0021] Compared with metal panels, the door body and door panels provided in this application, including ABS sheets, UV coatings, and color film pattern layers, have higher rigidity, are not easily dented even under the impact of gravity, and do not require a protective layer to be added to the panel, while meeting the requirements for refrigerator door assembly and foaming.

[0022] Compared with glass panels, the door body and door panels provided in this application are treated with UV coating to increase the surface hardness and improve the wear and scratch resistance of the ABS board. They can also be coated to obtain appearances with different patterns, which greatly reduces the risk of self-explosion and increases the impact performance of the door body and door panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 It is a schematic diagram of the door panel structure;

[0025] Figure 2 The present invention is a flow chart of a method for preparing a door body and door panel. DETAILED DESCRIPTION

[0026] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0027] To facilitate the description of the technical solution of the application, some concepts involved in the application are first explained below.

[0028] ABS resin is a copolymer of acrylonitrile-butadiene-styrene, a thermoplastic polymer material with high strength, good toughness and easy processing.

[0029] Heavy calcium carbonate is made by grinding natural carbonate minerals such as calcite, marble, and limestone. It has the advantages of high chemical purity, high inertness, no chemical reaction, good thermal stability, no decomposition below 400°C, high whiteness, low oil absorption, low refractive index, softness, dryness, no crystal water, low hardness, small abrasion value, non-toxicity, tastelessness, odorlessness, and good dispersibility.

[0030] Nano calcium carbonate, also known as ultrafine calcium carbonate, can improve the rheological properties of plastic masterbatch and enhance its formability. It can be used as a plastic filler to enhance toughness and reinforcement, increase the flexural strength and flexural elastic modulus, heat deformation temperature and dimensional stability of plastics, and also give plastics thermal hysteresis.

[0031] Calcium stearate is an organic compound, white powder, insoluble in water, and can be used as a waterproofing agent, lubricant, and plastic additive.

[0032] Stearic acid is a compound, namely octadecanoic acid; stearic acid is widely used in the manufacture of PVC plastic pipes, plates, profiles, and films. It is a PVC heat stabilizer with excellent lubricity and good light and heat stability.

[0033] Polyethylene wax, also known as polymer wax, is widely used due to its excellent cold resistance, heat resistance, chemical resistance and wear resistance. As a lubricant, it has stable chemical properties and good electrical properties, and can improve the fluidity of polyethylene, polypropylene, ABS and the demoulding properties of polymethyl methacrylate and polycarbonate.

[0034] Antioxidants are plastic varieties that are sensitive to oxidative degradation during their manufacturing, processing, storage and application. Oxygen penetrates into plastic films and reacts with almost most polymers to cause degradation or cross-linking, thereby changing the properties of the material.

[0035] Masterbatch is a new type of colorant for polymer materials. Masterbatch is mainly used in plastics. It is composed of three basic elements: pigment or dye, carrier and additive. It is an aggregate made by uniformly attaching an extraordinary amount of pigment to the resin. Therefore, its coloring power is higher than the pigment itself. When processing, a small amount of masterbatch is mixed with uncolored resin to achieve the coloring resin or product with the designed pigment concentration.

[0036] Brightener removes oil, oxidized and unoxidized surface impurities on the metal surface through active surface, keeps the exterior of the object clean, glossy and color fast. It affects the texture of the appearance through grinding and improves the efficiency of polishing.

[0037] Toughening agent refers to a substance that can increase the flexibility of the adhesive film. Toughening agent is a substance that can reduce brittleness, increase toughness, and improve bearing strength without affecting other main properties of the adhesive. Toughening agent contains active groups that can react chemically with the resin. After curing, it is not completely compatible and sometimes even phase separation is required. It will achieve a more ideal toughening effect, keep the heat deformation temperature unchanged or decrease slightly, and significantly improve the impact resistance.

[0038] The materials of refrigerator panels are mainly tempered glass and metal panels. The thickness of metal panels is thin, generally 0.4-0.6mm, with poor rigidity and easy to be dented under gravity impact. Compared with large-sized door panels, when the refrigerator door is foamed, in order to reduce the panel shrinkage caused by the shrinkage of the foaming layer, a protective layer of felt and other materials is generally added to the back of the panel before the door is foamed, which increases the manufacturing cost; in addition, it is difficult for metal panels to achieve a high-touch texture. After technological processing, tempered glass panels can obtain a high-quality appearance and good rigidity, and there is no need to add a protective layer. However, due to technological limitations, tempered glass has a certain self-explosion rate and deviations in impact resistance, and the price of metal panels is relatively high.

[0039] To solve the above problems, some embodiments of the present application provide an ABS sheet, which is prepared by the following raw materials in parts by weight: 100 parts of ABS resin, 10-40 parts of heavy calcium carbonate, 10-40 parts of nano calcium carbonate, 1-3 parts of calcium stearate, 1-3 parts of stearic acid, 0.5-3 parts of polyethylene wax, and 0.5-3 parts of antioxidant.

[0040] The ABS sheet of the present application includes 10-40 parts of heavy calcium carbonate, for example: 10, 15, 20, 25, 30, 35, 40 parts by weight of heavy calcium carbonate; the ABS sheet of the present application includes 10-40 parts of nano calcium carbonate, for example: 10, 15, 20, 25, 30, 35, 40 parts by weight of nano calcium carbonate; the ABS sheet of the present application includes 1-3 parts of calcium stearate, for example: 1, 2, 3 parts by weight of calcium stearate; the ABS sheet of the present application includes 1-3 parts of stearic acid, for example: 1, 2, 3 parts by weight of stearic acid; the ABS sheet of the present application includes 0.5-3 parts of polyethylene wax, for example: 0.5, 1, 1.5, 2, 2.5, 3 parts by weight of polyethylene wax; the ABS sheet of the present application includes 0.5-3 parts of antioxidant, for example: 0.5, 1, 1.5, 2, 2.5, 3 parts by weight of antioxidant.

[0041] The ABS resin, heavy calcium carbonate, nano calcium carbonate, calcium stearate, stearic acid, polyethylene wax and antioxidant used in the examples can be prepared according to conventional techniques. The materials are uniformly mixed according to the ratio shown in Table 1 to prepare the ABS sheets of Examples 1-7 for experiments.

[0042]

[0043]

[0044] Table 1

[0045] It can be understood that the weight parts of ABS resin in Examples 1-7 in Table 1 are all 100 weight parts, and in order to reduce the influence of the antioxidant on other components, the weight parts of the antioxidant in Examples 1-7 are all 1 weight part.

[0046] Referring to Table 1, Example 1 is the lowest weight portion of each substance, and Example 7 is the highest weight portion of each substance, excluding the antioxidant.

[0047] In order to evenly mix the substances of different weight portions in Examples 1-7, some embodiments of the present application provide a method for preparing an ABS sheet, based on the above-mentioned ABS sheet, for preparing the above-mentioned ABS sheet, comprising:

[0048] 100 parts of ABS resin, 10-40 parts of heavy calcium carbonate, 10-40 parts of nano calcium carbonate, 1-3 parts of calcium stearate, 1-3 parts of stearic acid, 0.5-3 parts of polyethylene wax, and 0.5-3 parts of antioxidant, respectively weighed, are placed in a mixer and fully mixed to obtain a mixture;

[0049] The mixture was placed in a single screw extruder to obtain an ABS sheet.

[0050] In some embodiments, the temperature of the mixer is 60-80° C., and the mixing time is 10-20 minutes.

[0051] In some embodiments, the temperature of the single screw extruder is 180-230° C., the rotation speed is 400-650 r / min, and the extrusion time is 5-20 minutes.

[0052] The materials of Examples 1-7 in different weight portions were mixed. In order to reduce the influence of the mixer temperature, mixing time, and the temperature, rotation speed, and extrusion time of the single-screw extruder on the mixture, the mixer used in Examples 1-7 was the same mixer, the temperature of the mixer was selected to be 60° C., the mixing time was selected to be 15 minutes, the temperature of the single-screw extruder was selected to be 180° C., the rotation speed was selected to be 400 r / min, and the extrusion time was 10 minutes.

[0053] In some embodiments, the mixture is dried and the mixture may be water cooled or air cooled.

[0054] The different mixtures obtained in Examples 1-7 were air-cooled to obtain different ABS sheets. The ABS sheets in Examples 1-7 were subjected to rigidity tests and impact tests. The rigidity test was performed by installing a rigidity test device on the surface of the ABS sheets in Examples 1-7. Without adding weights, a torsion spring comparator was brought into contact with the surface of the ABS sheet and the readings were recorded. By continuously adding weights, the readings of the torsion spring comparator were recorded. The difference between the readings was the deflection value of the ABS sheet under the rated load, and the deflection value could reflect the rigidity of the ABS sheet.

[0055] The impact test is to impact the ABS sheets in Examples 1-7, and a drop hammer impact tester can be used, wherein the impact height, hammer mass, etc. can be set by oneself. After the drop hammer impact tester completes the impact, the impact resistance of the ABS sheet can be reflected by measuring the depth of the impacted position.

[0056] The following table shows the results of the rigidity test and the impact test in Examples 1-7;

[0057]

[0058]

[0059] Table 2

[0060] It can be seen from Table 2 that the rigidity test and impact test results of the ABS sheet in Example 2 are good. Preferably, the ABS sheet is prepared by including the following raw materials in parts by weight: 100 parts of ABS resin, 20 parts of heavy calcium carbonate, 20 parts of nano calcium carbonate, 1 part of calcium stearate, 1 part of stearic acid, 1 part of polyethylene wax, and 1 part of antioxidant.

[0061] In order to make the door body and door panel more beautiful, the door body and door panel can be a colored ABS sheet. Therefore, in some embodiments, 1-4 parts of masterbatch are also included. The ABS sheet of the present application includes 1-4 parts of masterbatch, for example: 1, 1.5, 2, 2.5, 3, 3.5, 4 parts by weight of masterbatch, and the color of the door body and door panel can be changed by masterbatch, for example: using gray masterbatch, the door body and door panel are gray as a whole.

[0062] Furthermore, in order to increase the brightness and toughness of the ABS sheet, the ABS sheet of the present application may also include a brightener and a toughening agent, wherein the brightener may be selected from one or more of oleamide, pentaerythritol stearate, and erucic acid amide. In some embodiments, the weight portion of the brightener is 0.01-0.05 parts, and the ABS sheet of the present application includes 0.01-0.15 parts of brightener, for example: 0.01, 0.02, 0.03, 0.04, 0.05 parts by weight of brightener.

[0063] The toughening agent can be selected from one or more of styrene, diene or acrylic polymers. For example, a butadiene-containing polymer has the best toughening due to its low glass transition temperature. In some embodiments, the weight portion of the toughening agent is 0.3-0.7 parts. The ABS sheet of the present application includes 0.3-0.7 parts of the toughening agent, for example: 0.3, 0.4, 0.5, 0.6, 0.7 parts by weight of the toughening agent.

[0064] In addition to the influence of different weights of substances on the performance of ABS sheets, different mixer temperatures, mixing times, and the temperature, rotation speed, and extrusion time of the single-screw extruder also have an impact on the performance of ABS sheets. According to the parameters shown in Table 3, ABS sheets of Examples 1-6 were prepared for experiments.

[0065]

[0066] Table 3

[0067] After the different ABS plates obtained in Examples 1-6 were air-cooled, rigidity tests and impact tests were performed. The specific test steps can be referred to above and will not be repeated here. Please refer to the following table directly. The following table shows the results of the rigidity tests and impact tests in Examples 1-6.

[0068]

[0069]

[0070] Table 3

[0071] It can be seen from Table 3 that the rigidity test and impact test results of the ABS sheet in Example 3 are good. Preferably, the temperature of the mixer is 70°C, the mixing temperature is 10 minutes, the temperature of the single-screw extruder is 200°C, the speed is 500r / min, and the extrusion time is 10 minutes.

[0072] Based on the above ABS sheet, see Figure 1 Some embodiments of the present application provide a door body and door panel, including a UV coating, a color film pattern layer and the aforementioned ABS sheet.

[0073] In some embodiments, the color film pattern layer is a PET film or a PVC film, and the thickness of the color film pattern layer is 0.05-0.13 mm. The thickness of the color film pattern layer is, for example: 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13. Among them, the transparency of the PET film is good, and it is glossy. Its toughness is the best among all thermoplastics, and its tensile strength and impact strength are good, but it is easy to carry static electricity. The main component of the PVC film is polyvinyl chloride, which is slightly yellow and translucent, glossy, rainproof, fire-resistant, antistatic, and easy to shape. When in use, you can choose to use PET film or PVC film according to the color of the pattern. If you need to reduce the color of the pattern from being affected, you can choose PET film, because the PVC film is slightly yellow, which may affect the color of the pattern.

[0074] In some embodiments, the thickness of the ABS sheet is 2-4 mm, for example: 2, 3, 4.

[0075] See also Figure 2 Based on the above-mentioned door body and door panel, some embodiments of the present application provide a method for preparing a door body and door panel, which is used for the above-mentioned door body and door panel, and the method includes:

[0076] S100: combining the color film pattern layer with the ABS sheet through heat lamination to obtain an ABS sheet with a pattern;

[0077] In some embodiments, in order to improve the preparation efficiency of door bodies and door panels, the color film pattern layer and ABS sheet can be laminated by a hot pressing laminating machine so that the color film pattern layer, that is, the pattern on the PET film or PVC film is printed on the ABS sheet. For example, the pattern can be refrigerator cooling, preservation, network display, etc.

[0078] S200: pressing the ABS sheet with the pattern through a shaping roller to obtain a pressed ABS sheet;

[0079] In some embodiments, the shaping roller may be an embossing roller, or a mirror roller or a matte roller. The embossing roller may increase the texture of the ABS sheet. Embossing rollers of different shapes may be selected according to the texture requirements. The mirror roller may be used for calendering of the ABS sheet.

[0080] S300: Cooling and shaping the pressed ABS sheet and then cutting it to obtain a cut ABS sheet;

[0081] In some embodiments, the cooling method can be selected from natural cooling, air cooling, water cooling, etc., which can be selected according to the preparation time. The natural cooling time is longer, and the air cooling and water cooling times are not much different. If rapid cooling is required, in some embodiments, a rapid cooling refrigerator can be selected to improve the cooling efficiency.

[0082] The size of the pressed ABS board can be cut according to the size of the refrigerator door panel, and the cutting length and width can be set by a cutting machine.

[0083] S400: Add UV coating to the cut ABS sheet by varnishing to obtain the door body and door panel.

[0084] Varnishing is the process of applying one or several coats of varnish on the cut ABS sheet to increase or improve the gloss of the coating surface. UV coating cures quickly, does not pollute the environment, and does not require drying, which increases the preparation efficiency of door bodies and door panels.

[0085] An ABS sheet and preparation method thereof, a door body and door panel and preparation method thereof prepared by the preparation method provided in the embodiment of the present application have higher rigidity than metal panels, are not easy to produce dents even under the impact of gravity, and do not need to add a protective layer on the panel, which saves costs while meeting the requirements of refrigerator door assembly and foaming. Compared with glass panels, the door body and door panel provided in the present application are treated with UV coating and glazing to increase the surface hardness and improve the wear and scratch resistance of the ABS sheet. They can also be coated to obtain appearances with different patterns, which also greatly reduces the risk of self-explosion and increases the impact performance of the door body and door panel.

[0086] It can be seen from the above technical scheme that the present application provides an ABS sheet and a preparation method thereof, a door body and a preparation method thereof, wherein the ABS sheet is prepared from the following raw materials in parts by weight: 100 parts of ABS resin, 10-40 parts of heavy calcium carbonate, 10-40 parts of nano calcium carbonate, 1-3 parts of calcium stearate, 1-3 parts of stearic acid, 0.5-3 parts of polyethylene wax, and 0.5-3 parts of antioxidant; the door body and door panel include a UV coating, a color film pattern layer, and an ABS sheet. This solves the problem of self-explosion of tempered glass panels and poor rigidity of metal panels.

[0087] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. An ABS sheet, characterized in that: The invention is prepared from the following raw materials in parts by weight: 100 parts of ABS resin, 10-40 parts of heavy calcium carbonate, 10-40 parts of nano calcium carbonate, 1-3 parts of calcium stearate, 1-3 parts of stearic acid, 0.5-3 parts of polyethylene wax, 0.5-3 parts of antioxidant, 0.01-0.05 parts of brightener and 0.3-0.7 parts of toughening agent, wherein the toughening agent is one or more of styrene, diene or acrylic polymer.

2. The ABS sheet according to claim 1, characterized in that: Also includes 1-4 parts of masterbatch.

3. A door body and door panel, characterized in that: The invention comprises a UV coating, a color film pattern layer and the ABS sheet material according to any one of claims 1 to 2.

4. The door body and door panel according to claim 3, characterized in that: The color film pattern layer is a PET film or a PVC film, and the thickness of the color film pattern layer is 0.05-0.13 mm.

5. The door body and door panel according to claim 3, characterized in that: The thickness of the ABS sheet is 2-4 mm.

6. A method for preparing an ABS sheet, characterized in that: Used to prepare the ABS sheet according to any one of claims 1-2, comprising: 100 parts of ABS resin, 10-40 parts of heavy calcium carbonate, 10-40 parts of nano calcium carbonate, 1-3 parts of calcium stearate, 1-3 parts of stearic acid, 0.5-3 parts of polyethylene wax, and 0.5-3 parts of antioxidant, respectively weighed, are placed in a mixer and fully mixed to obtain a mixture; The mixture is placed in a single screw extruder to obtain an ABS sheet.

7. The method for preparing the ABS sheet according to claim 6, characterized in that: The temperature of the mixer is 60-80°C, and the mixing time is 10-20 minutes.

8. The method for preparing the ABS sheet according to claim 6, characterized in that: The temperature of the single-screw extruder is 180-230° C., the rotation speed is 400-650 r / min, and the extrusion time is 5-20 minutes.

9. A method for preparing a door body and door panel, characterized in that: For preparing the door body and door panel of claim 3, the method comprises: combining the color film pattern layer with the ABS sheet by heat lamination to obtain the ABS sheet with the pattern; The ABS sheet with the pattern is pressed by a shaping roller to obtain a pressed ABS sheet; Cooling and shaping the pressed ABS sheet and then cutting it to obtain a cut ABS sheet; The cut ABS sheet is treated with a UV coating to obtain a door body and a door panel.

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