Solar energy reflecting PC (polycarbonate) board and preparation method thereof

Abstract

The invention discloses a solar energy reflection PC plate and a preparation method, and belongs to the technical field of plate processing, the solar energy reflection PC plate comprises a PC plate body, and a heat insulation agent with light reflection characteristics is added in the PC plate body. The preparation method comprises the following steps: mixing polycarbonate and a heat insulation agent with a light reflection characteristic into an extrusion raw material; and extruding the extruded raw material to form the PC board body. The heat insulation agent with the light reflection characteristic is added into the PC board body, so that the PC board body has the heat insulation and light reflection functions, no additional coating silver paste or surface-mounted reflection film is needed, the color difference problem is solved, the attractiveness and texture of the product are guaranteed, the problem of cost increase caused by the secondary processing procedure is avoided, and the production efficiency is improved. And the problem of silver paste stripping does not exist.

Description

Technical Field

[0001] The present invention relates to the technical field of plate processing, and in particular to a solar light reflecting PC plate and a preparation method thereof. Background Art

[0002] Traditional polycarbonate (PC) sheets are used to achieve heat insulation and light reflection functions, such as Figure 2 As shown, after the PC sheet is extruded (also known as extrusion molding), a silver paste layer 4 is usually coated on the surface of the PC sheet 3 (or a reflective film is applied) to make the surface of the PC sheet 3 have heat insulation and light reflection effects. However, this process has the following technical defects:

[0003] ① Appearance and cost issues: There is a significant color difference between the PC sheet and the silver paste or film, resulting in poor product consistency, unsightly appearance, and poor texture. If the secondary processing requires an independent coating or lamination process, it will also increase labor, material, and equipment costs.

[0004] ② Durability issue: PC sheet and silver paste are made of different materials, and their shrinkage rates are different. The thermal expansion coefficient of PC sheet is CTE≈65×10 - 6 / ℃, the thermal expansion coefficient of silver paste CTE≈25×10 - 6 / ℃, after long-term use, due to thermal expansion and contraction, the silver paste is easy to peel off from the surface of the PC board, causing defects. Summary of the Invention

[0005] The purpose of the present invention is to solve the above-mentioned technical problems and provide a sunlight-reflecting PC board and a preparation method. A heat-insulating agent with light-reflecting properties is added to the PC board body, so that the PC board body itself has heat-insulating and light-reflecting functions, and does not require additional processing such as coating silver paste or laminating reflective film. This solves the color difference problem and ensures the beauty and texture of the product, without the cost increase caused by secondary processing steps, and there is no problem of silver paste peeling.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention discloses a sunlight-reflecting PC board, comprising a PC board body, into which a heat-insulating agent with light-reflecting properties is added.

[0007] Preferably, the heat insulating agent is a metallic luster raw material or a pearlescent pigment.

[0008] Preferably, the metallic luster raw material may be a powder or a slurry.

[0009] Preferably, the powder is metal powder, and the slurry is metal slurry.

[0010] Preferably, the metal powder is gold powder or silver powder, and the metal slurry is gold slurry or silver slurry.

[0011] Preferably, the PC board body is extruded by mixing polycarbonate and the heat insulating agent.

[0012] Also disclosed is a method for preparing a solar energy reflective PC sheet, comprising the following steps:

[0013] Mix polycarbonate and a heat-insulating agent with light-reflecting properties to form extrusion raw materials;

[0014] The extruded raw material is extruded into the PC board body.

[0015] Preferably, the polycarbonate and the thermal insulation agent are mixed at a temperature of 270°C to 300°C.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] In the present invention, a heat-insulating agent with light-reflecting properties is added to the PC board body, so that the PC board body itself has heat-insulating and light-reflecting functions, and there is no need for additional processing such as coating with silver paste or laminating with reflective film. This solves the color difference problem and ensures the beauty and texture of the product, without the cost increase caused by secondary processing steps and the problem of silver paste peeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the analysis of these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of a PC sheet material that reflects sunlight in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of a traditional solar energy reflective PC sheet.

[0021] Explanation of the accompanying symbols: 1. PC board body; 2. Heat insulation agent; 3. PC board; 4. Silver paste layer. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 analyzed and obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a sunlight-reflecting PC sheet and a preparation method to solve the problems existing in the prior art. A heat-insulating agent with light-reflecting properties is added to the PC sheet body, so that the PC sheet body itself has heat-insulating and light-reflecting functions, and does not require additional processing such as coating with silver paste or laminating with reflective film. This solves the color difference problem and ensures the beauty and texture of the product, while eliminating the cost increase caused by secondary processing steps and avoiding the problem of silver paste peeling.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] like Figures 1 to 2 As shown, this embodiment provides a sunlight-reflective PC sheet material, comprising a PC sheet body 1, into which is added a heat-insulating agent 2 having light-reflecting properties. The addition of the light-reflecting heat-insulating agent 2 within the PC sheet body 1 inherently provides the PC sheet body 1 with both heat-insulating and light-reflecting functions, eliminating the need for additional processing such as silver paste coating or reflective film lamination. This resolves color differences, maintains the product's aesthetics and quality, eliminates the costly secondary processing steps, and eliminates the silver paste peeling issue.

[0027] In one embodiment, the heat-insulating agent 2 is a metallic effect pigment or a pearl pigment. The metallic effect pigment can be a metal or non-metallic material, as long as it can impart a metallic luster to the PC board body 1. Pearl pigments, such as pearlescent powder (paste), can create multi-layered reflections.

[0028] In one embodiment, the metallic luster raw material may be a powder or a slurry.

[0029] In one embodiment, the powder is metal powder, and the slurry is metal slurry.

[0030] In one embodiment, the metal powder is gold powder or silver powder, and the metal slurry is gold paste or silver paste. Gold powder or silver powder, gold paste, or silver paste refers to gold or silver powder or slurry. Gold powder is typically made from copper powder or alloy powders such as copper and zinc, while silver powder is typically made from aluminum powder. Gold paste is made from gold powder, and silver paste is made from silver powder.

[0031] In one embodiment, the pearlescent powder (paste) mainly comprises mica and metal oxide, such as titanium dioxide. The pearlescent powder (paste) can make the PC board body 1 have a high refractive index.

[0032] In one embodiment, the PC board body 1 is formed by extrusion molding of a mixture of polycarbonate and a heat insulating agent 2 .

[0033] In one embodiment, the amount of the heat insulating agent 2 added is proportioned according to actual conditions, such as a mass ratio of 3%.

[0034] Example 2

[0035] like Figures 1 to 2 As shown, this embodiment provides a method for preparing a sunlight reflective PC sheet material, which is used to prepare the sunlight reflective PC sheet material in Example 1, comprising the following steps:

[0036] Mix polycarbonate and a heat-insulating agent 2 having light-reflecting properties to form an extrusion raw material;

[0037] The extruded raw material is extruded to form the PC board body 1.

[0038] After the PC board body 1 is extruded, it has heat insulation and light reflection functions. After extrusion molding, there is no need to coat the surface with a layer of silver paste, so there will be no disadvantages such as silver paste shedding and color difference between the silver paste and the PC board. This preparation method is more advanced and more practical than before.

[0039] In one embodiment, the polycarbonate and the heat insulating agent 2 are mixed at a temperature of 270° C. to 300° C. Of course, this temperature parameter is a reference value and can be adjusted according to actual conditions and needs.

[0040] In one embodiment, the polycarbonate and the heat insulating agent 2 need to be mixed as evenly as possible, and a stirring mixing device may be used to mix the gases to ensure the mixing uniformity.

[0041] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A solar energy reflecting PC sheet, characterized in that: The invention comprises a PC board body, wherein a heat insulating agent with light reflecting properties is added into the PC board body.

2. The solar energy reflecting PC sheet according to claim 1, characterized in that: The heat insulating agent is a metallic luster raw material or a pearlescent pigment.

3. The solar energy reflecting PC sheet according to claim 2, characterized in that: The metallic luster raw material can be a powder or a slurry.

4. The solar energy reflecting PC sheet according to claim 3, characterized in that: The powder is metal powder, and the slurry is metal slurry.

5. The solar energy reflecting PC sheet according to claim 4, characterized in that: The metal powder is gold powder or silver powder, and the metal slurry is gold slurry or silver slurry.

6. The solar energy reflecting PC sheet according to claim 1, characterized in that: The PC board body is formed by mixing polycarbonate and the heat insulating agent and extruding the mixture.

7. A method for preparing a solar energy reflecting PC sheet, characterized in that: The following steps are involved: Mix polycarbonate and a heat-insulating agent with light-reflecting properties to form extrusion raw materials; The extruded raw material is extruded into the PC board body.

8. The method for preparing a solar energy reflecting PC sheet according to claim 7, characterized in that: The polycarbonate and the heat insulating agent are mixed at a temperature of 270° C. to 300° C.

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