Thermal insulation type acrylic plate and preparation method thereof

Abstract

The invention discloses a heat preservation type acrylic plate and a preparation method thereof, the heat preservation type acrylic plate comprises a protective layer, a heat preservation layer and a light transmission layer, the protective layer, the heat preservation layer and the light transmission layer are sequentially compounded in a hot melting mode, the protective layer is prepared from, by weight, 60 parts of polymethyl methacrylate, 25 parts of fiber particles and 15 parts of glue, the fiber particles are quartz fibers, the diameter of the fiber particles is 10-20 microns, and the diameter of the glue is 10-20 microns. The length of the acrylic plate is 80-100 microns, and the acrylic plate is used for improving the toughness and the sound insulation effect of a protective layer after the protective layer is formed. According to the thermal insulation type acrylic plate and the preparation method thereof, the fiber particles are added in the protective layer, the light transmission of the exterior of the acrylic plate can be reduced and privacy can be improved under the action of the fiber particles, meanwhile, the toughness of the external protective layer is improved, the aluminum film is added in the thermal insulation layer, the light reflection characteristic of the aluminum film can be utilized, and the thermal insulation performance of the acrylic plate is improved. Heat and light emitted indoors are reflected, so that the heat is prevented from directly radiating outwards through the light acrylic plate, and the overflow of the heat is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal insulation type acrylic plates, in particular to a thermal insulation type acrylic plate and a preparation method thereof. Background Art

[0002] Acrylic, also known as specially treated organic glass, is a replacement product for organic glass. Light boxes made of acrylic have the characteristics of good light transmittance, pure color, rich color, beautiful and flat appearance, taking into account both day and night effects, long service life, and no impact on use. In addition, acrylic sheets can be perfectly combined with aluminum-plastic plate profiles and high-end screen printing to meet the needs of merchants. Acrylic blister is the best form of outdoor advertising to improve the grade of business stores and unify the corporate image.

[0003] Although existing acrylic panels are aesthetically pleasing and are often installed in stores or indoors as partitions, they still have obvious defects in actual use, such as:

[0004] Acrylic sheets tend to be transparent, which means they cannot protect personal privacy when used as partitions. At the same time, acrylic sheets themselves are thin and made of a single material, which means they cannot insulate the internal environment after installation and use, causing discomfort to people inside.

[0005] Therefore, a kind of heat-insulating acrylic board is designed now to solve this type of defect. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a thermal insulation acrylic sheet and a preparation method thereof, which solve the problems of low thermal insulation and poor privacy of the existing acrylic sheets.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a thermal insulation acrylic board and a preparation method thereof, comprising a protective layer, a thermal insulation layer and a light-transmitting layer, wherein the protective layer, the thermal insulation layer and the light-transmitting layer are hot-melt composited in sequence.

[0008] Preferably, the protective layer material comprises 60-70 parts by weight of polymethyl methacrylate, 20-25 parts of fiber particles, and 10-15 parts of glue;

[0009] The materials of the thermal insulation layer are 10-25 parts by weight of polymethyl methacrylate, 50-60 parts by weight of reflective sheet, and 25-30 parts by weight of glue;

[0010] The materials of the light-transmitting layer are 45-65 parts by weight of polymethyl methacrylate, 25-30 parts by weight of a light-transmitting agent, and 10-30 parts by weight of polytetrafluoroethylene.

[0011] Preferably, the glue is a urea-formaldehyde resin adhesive;

[0012] The fiber particles are quartz fibers;

[0013] The reflective sheet is an aluminum film.

[0014] Preferably, the diameter of the fiber particles is 10-20 μm, and the length of the fiber particles is 80-100 μm.

[0015] Preferably, the diameter of the reflective sheet is 1-2 cm, and the thickness of the reflective sheet is 0.01 mm-0.05 mm.

[0016] The present invention also discloses a method for preparing a heat-insulating acrylic plate, which specifically comprises the following steps:

[0017] S1. By weight, 60-70 parts of polymethyl methacrylate, 20-25 parts of fiber particles, and 10-15 parts of glue are added to a mixer and stirred. After the polymethyl methacrylate, fiber particles, and glue are stirred to form a mixture, the mixture is added to an extruder. The polymethyl methacrylate is melted in the extruder at a temperature of 160° C. to 180° C. to obtain a fluid material. Finally, the extruder extrudes the fluid material into a dedicated mold. When the fluid material is cooled to 30° C. to 40° C., it is formed to obtain a protective layer.

[0018] S2. By weight, 50-60 parts of reflective sheeting are laid flat on the top of the protective layer, 15-20 parts of polymethyl methacrylate and 25-30 parts of glue are put into the extruder, and hot-melted at a temperature of 160°C-180°C in the extruder. After the hot-melt is completed, it is squeezed into the top of the protective layer in the mold, and the aluminum film on the top is wrapped at the same time. When it is cooled to 30°C-40°C, it is formed to obtain a thermal insulation layer, and the thermal insulation layer and the protective layer are integrated;

[0019] S3. By weight, 45-65 parts of polymethyl methacrylate, 25-30 parts of translucent agent and 10-30 parts of polytetrafluoroethylene solid material are put into a stirrer to stir the three materials, and then the stirred mixture is put into an extruder, and hot-melted at a temperature of 160°C-180°C in the extruder. The heating function of the extruder is used to hot-melt the mixture into a fluid material. After hot-melting, the fluid material is coated on the top of the thermal insulation layer. When it is cooled to 30°C-40°C, it is formed to obtain a translucent layer. At the same time, the thermal insulation layer and the translucent layer are integrated to obtain a complete thermal insulation acrylic sheet.

[0020] Beneficial effects

[0021] The present invention provides a heat-insulating acrylic sheet and a preparation method thereof. Compared with the existing technology, it has the following advantages:

[0022] (1) The heat-insulating acrylic sheet and its preparation method, by adding fiber particles in the protective layer, can reduce the light transmittance of the outer part of the acrylic sheet by utilizing the effect of the fiber particles, thereby improving privacy and increasing the toughness of the outer protective layer. The addition of aluminum film in the heat-insulating layer can utilize the reflective properties of the aluminum film to reflect the heat and light emitted from the room, thereby preventing the heat from being directly dissipated outward through the light acrylic sheet, effectively reducing the heat overflow and improving the heat preservation.

[0023] (2) The heat-insulating acrylic sheet and its preparation method can effectively improve the smoothness of the surface of the light-transmitting layer after molding by adding polytetrafluoroethylene into the light-transmitting layer, thereby preventing a large amount of water vapor from adhering to the surface of the acrylic sheet. The light-transmitting agent can improve the transparency of the light-transmitting layer, thereby reducing the obstruction of heat and light from effectively contacting and reflecting the aluminum diaphragm. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The present invention provides the following technical solutions:

[0026] Example 1

[0027] S1. By weight, 60 parts of polymethyl methacrylate, 25 parts of fiber particles, and 15 parts of glue are put into a mixer and stirred. After the polymethyl methacrylate, fiber particles, and glue are stirred to form a mixture, the mixture is put into an extruder. The polymethyl methacrylate is melted at a temperature of 160° C. in the extruder to obtain a fluid material. Finally, the extruder extrudes the fluid material into a dedicated mold. When the fluid material is cooled to 30° C., it is formed to obtain a protective layer.

[0028] S2. Lay 50 parts of reflective sheeting on the top of the protective layer by weight, put 20 parts of polymethyl methacrylate and 30 parts of glue into an extruder, and heat-melt them at a temperature of 160°C in the extruder. After the hot melt is completed, squeeze it into the top of the protective layer in the mold, and wrap the aluminum film on the top. When it is cooled to 30°C, it is formed to obtain a thermal insulation layer, and the thermal insulation layer and the protective layer are integrated;

[0029] S3. By weight, 45 parts of polymethyl methacrylate, 30 parts of translucent agent and 30 parts of polytetrafluoroethylene solid material are put into a stirrer to stir the three materials, and then the stirred mixture is put into an extruder, and hot-melted at a temperature of 160°C in the extruder. The heating function of the extruder is used to hot-melt the mixture into a fluid material. After hot-melting, the fluid material is coated on the top of the thermal insulation layer. When it is cooled to 30°C, it is formed to obtain a translucent layer. At the same time, the thermal insulation layer and the translucent layer are integrated to obtain a complete thermal insulation acrylic board.

[0030] Example 2

[0031] S1. Add 70 parts of polymethyl methacrylate, 20 parts of fiber particles, and 10 parts of glue into a mixer and stir them. After the polymethyl methacrylate, fiber particles, and glue are stirred to form a mixture, the mixture is put into an extruder. The polymethyl methacrylate is melted at a temperature of 180° C. in the extruder to obtain a fluid material. Finally, the extruder extrudes the fluid material into a dedicated mold. When the fluid material is cooled to 40° C., it is formed to obtain a protective layer.

[0032] S2. Lay 60 parts of reflective sheeting on the top of the protective layer by weight, put 15 parts of polymethyl methacrylate and 25 parts of glue into an extruder, and heat-melt them at a temperature of 180°C in the extruder. After the hot melt is completed, squeeze it into the top of the protective layer in the mold, and wrap the aluminum film on the top. When it is cooled to 40°C, it is formed to obtain a thermal insulation layer, and the thermal insulation layer and the protective layer are integrated;

[0033] S3. According to weight, 65 parts of polymethyl methacrylate, 25 parts of translucent agent and 10 parts of polytetrafluoroethylene solid material are put into a stirrer to stir the three materials, and then the stirred mixture is put into an extruder, and hot-melted at a temperature of 180°C in the extruder. The heating function of the extruder is used to hot-melt the mixture into a fluid material. After hot-melting, the fluid material is coated on the top of the thermal insulation layer. When it is cooled to 40°C, it is formed to obtain a translucent layer. At the same time, the thermal insulation layer and the translucent layer are integrated to obtain a complete thermal insulation acrylic board.

[0034] Example 3

[0035] S1. Add 65 parts of polymethyl methacrylate, 22 parts of fiber particles, and 13 parts of glue into a mixer and stir them. After the polymethyl methacrylate, fiber particles, and glue are stirred to form a mixture, the mixture is added to an extruder. The polymethyl methacrylate is melted at a temperature of 170° C. in the extruder to obtain a fluid material. Finally, the extruder extrudes the fluid material into a dedicated mold. When the fluid material is cooled to 35° C., it is formed to obtain a protective layer.

[0036] S2. Lay 55 parts of reflective sheeting on the top of the protective layer by weight, put 18 parts of polymethyl methacrylate and 27 parts of glue into an extruder, and heat-melt them at a temperature of 170°C in the extruder. After the hot melt is completed, squeeze it into the top of the protective layer in the mold, and wrap the aluminum film on the top. When it is cooled to 35°C, it is formed to obtain a thermal insulation layer, and the thermal insulation layer and the protective layer are integrated;

[0037] S3. By weight, 55 parts of polymethyl methacrylate, 27 parts of translucent agent and 18 parts of polytetrafluoroethylene solid material are put into a stirrer to stir the three materials, and then the stirred mixture is put into an extruder, and hot-melted at a temperature of 170°C in the extruder. The heating function of the extruder is used to hot-melt the mixture into a fluid material. After hot-melting, the fluid material is coated on the top of the thermal insulation layer. When it is cooled to 35°C, it is formed to obtain a translucent layer. At the same time, the thermal insulation layer and the translucent layer are integrated to obtain a complete thermal insulation acrylic sheet.

[0038] The acrylic sheets obtained according to Example 1, Example 2 and Example 3 were subjected to 4h thermal permeability, heat preservation and sheet toughness index tests.

[0039] The 4h thermal permeability test method is: thermal conductivity test method, install a heating source on one side of the plate and set it to a constant temperature of 35℃, and measure its temperature change on the other side of the plate;

[0040] The thermal insulation test method is as follows: four acrylic panels are connected to each other in a rectangular shape, a heating source is installed in the internal space and set to a constant temperature of 35°C, and the temperature of the internal space is tested;

[0041] The plate toughness test method is: place the sample on the equipment, start the pendulum to make it fall freely, and record the impact energy consumed per unit volume or unit area when the sample breaks.

[0042] The test results are shown in Table 1:

[0043] Example 1 Example 2 Example 3 Thermal permeability 3℃ 6℃ 4.5℃ Thermal insulation 31℃ 26℃ 29℃ toughness 5.5kg.cm / cm 4kg.cm / cm² 4.6kg.cm / cm²

[0044] In summary, it can be seen that the acrylic sheet provided by the present invention not only has a good thermal insulation effect, but also has good toughness and strength.

[0045] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A thermal insulation acrylic sheet, comprising a protective layer, a thermal insulation layer and a light-transmitting layer, characterized in that: The protective layer, the heat-insulating layer and the light-transmitting layer are hot-melt-compounded in sequence.

2. The thermal insulation acrylic sheet according to claim 1, characterized in that: The protective layer material comprises 60-70 parts by weight of polymethyl methacrylate, 20-25 parts of fiber particles, and 10-15 parts of glue; The materials of the thermal insulation layer are 15-20 parts by weight of polymethyl methacrylate, 50-60 parts by weight of reflective sheet, and 25-30 parts by weight of glue; The materials of the light-transmitting layer are 45-65 parts by weight of polymethyl methacrylate, 25-30 parts by weight of a light-transmitting agent, and 10-30 parts by weight of polytetrafluoroethylene.

3. The thermal insulation acrylic sheet according to claim 1, characterized in that: The glue is urea-formaldehyde resin adhesive; The fiber particles are quartz fibers; The reflective sheet is an aluminum film.

4. The thermal insulation acrylic sheet according to claim 1, characterized in that: The diameter of the fiber particles is 10-20 μm, and the length of the fiber particles is 80-100 μm.

5. The thermal insulation acrylic sheet according to claim 1, characterized in that: The diameter of the reflective sheet is 1-2 cm, and the thickness of the reflective sheet is 0.01 mm-0.05 mm.

6. A method for preparing a thermal insulation acrylic sheet, characterized in that: The specific steps include: S1. By weight, 60-70 parts of polymethyl methacrylate, 20-25 parts of fiber particles, and 10-15 parts of glue are added to a mixer and stirred. After the polymethyl methacrylate, fiber particles, and glue are stirred to form a mixture, the mixture is added to an extruder. The polymethyl methacrylate is melted in the extruder at a temperature of 160° C. to 180° C. to obtain a fluid material. Finally, the extruder extrudes the fluid material into a dedicated mold. When the fluid material is cooled to 30° C. to 40° C., it is formed to obtain a protective layer. S2. By weight, 50-60 parts of reflective sheeting are laid flat on the top of the protective layer, 10-25 parts of polymethyl methacrylate and 25-30 parts of glue are put into the extruder, and hot-melted at a temperature of 160°C-180°C in the extruder. After the hot-melt is completed, it is squeezed into the top of the protective layer in the mold, and the aluminum film on the top is wrapped at the same time. When it is cooled to 30°C-40°C, it is formed to obtain a thermal insulation layer, and the thermal insulation layer and the protective layer are integrated; S3. By weight, 45-65 parts of polymethyl methacrylate, 25-30 parts of translucent agent and 10-30 parts of polytetrafluoroethylene solid material are put into a stirrer to stir the three materials, and then the stirred mixture is put into an extruder, and hot-melted at a temperature of 160°C-180°C in the extruder. The heating function of the extruder is used to hot-melt the mixture into a fluid material. After hot-melting, the fluid material is coated on the top of the thermal insulation layer. When it is cooled to 30°C-40°C, it is formed to obtain a translucent layer. At the same time, the thermal insulation layer and the translucent layer are integrated to obtain a complete thermal insulation acrylic sheet.