Method for recycling carbon fiber-containing polycarbonate and recycled plate

Abstract

The invention relates to a method for recycling carbon fiber-containing polycarbonate and a recycled plate. The method comprises the following steps: selecting a required amount of PIR polycarbonate carbon fiber plastic; the selected plastic is fed into a pulverizer to be pulverized; feeding the crushed material into a vacuum internal mixer for kneading, compressing and molding, and softening and re-molding again; the softened polycarbonate plastic balls containing the carbon fibers are directly fed into an extruder for re-granulation and molding; granulating again through a cooling water tank and a granulator; the method has the beneficial effects that the mechanical properties of the recycled plastic can be easily and greatly reserved through the methods of crushing, molding, pelleting and re-pelleting, carbon fibers do not need to be recycled through a high-temperature catalyst, the carbon fibers are recycled through a high-temperature catalyst, and the method is environment-friendly and energy-saving. The condition that the mechanical property is reduced due to hydrolysis caused by contact between high temperature and water vapor in air can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of the recycling of polycarbonate containing carbon fiber, and particularly to a method for recycling polycarbonate containing carbon fiber and the plate after recycling.

Background Art

[0002] Polycarbonate reinforced with carbon fiber is widely used in household appliances and high-end 3C products due to its excellent properties such as light weight, high strength, and low weight. However, the continuous growth in its use has led to a large amount of polycarbonate reinforced with carbon fiber being discarded, and due to its difficult recycling, a large amount of waste is generated. Therefore, from an economic perspective, recycling carbon fiber is beneficial to reducing the overall cost and the product's carbon footprint.

[0003] Currently, among the processes for recycling polycarbonate containing carbon fiber, only the high-temperature pyrolysis method has entered the mass production stage. However, this method easily causes a significant decrease in the mechanical properties of the recycled carbon fiber, resulting in poor recycling effects. Moreover, high-temperature decomposition will cause waste gas to be generated when the polycarbonate plastic burns, which is easy to pollute the environment, and the recycled polycarbonate cannot be reused. In addition, the polycarbonate plastic is also prone to hydrolysis due to its high temperature contact with water vapor in the air during the recycling process, thus reducing its mechanical properties.

[0004] In view of this, it is necessary to provide a method for recycling polycarbonate containing carbon fiber and the plate after recycling to solve the above problems.

Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the current method for recycling polycarbonate containing carbon fiber is the high-temperature pyrolysis method, but this method easily causes a significant decrease in the mechanical properties of the recycled carbon fiber, resulting in poor recycling effects. Moreover, high-temperature decomposition will cause waste gas to be generated when the polycarbonate plastic burns, which is easy to pollute the environment, and the recycled polycarbonate cannot be reused. Also, during the recycling process, it is prone to hydrolysis due to its high temperature contact with water vapor in the air, reducing its mechanical properties. Therefore, the present invention provides a method for recycling polycarbonate containing carbon fiber and the plate after recycling to solve the above problems.

[0006] The solution of the present invention to solve its technical problem is: A method for recycling polycarbonate containing carbon fiber, comprising the following steps:

[0007] S1: Material selection: Select the required amount of PIR (Post Industrial Recycled) polycarbonate carbon fiber plastic;

[0008] S2: Crushing: Feed the selected plastic into a crusher for crushing;

[0009] S3: Shaping: After sending the crushed material into a vacuum internal mixer for kneading, compressing and shaping, soften it again and reshape it.

[0010] S4: Granulation: Directly send the softened polycarbonate plastic mass containing carbon fiber into an extruder for re-granulation and shaping.

[0011] S5: Re-granulation: Perform granulation again through a cooling water tank and a pelletizer.

[0012] S6: Taking pellets: Take out the pellets after re-granulation to obtain the recycled plastic.

[0013] Preferably, the PIR polycarbonate carbon fiber plastic can be selected to contain 80% polycarbonate and 20% carbon fiber waste.

[0014] Preferably, the extruder can be a single-screw extruder.

[0015] In addition, the present invention also provides a recycled board, which is the board recycled by the above method for recycling polycarbonate containing carbon fiber.

[0016] The beneficial effect of the present invention is that the present invention is a method for recycling polycarbonate containing carbon fiber and the recycled board thereof. Through the methods of crushing, shaping, granulation and re-granulation, its mechanical properties can be simply and greatly retained. And in the present invention, it is not necessary to recover carbon fiber through high-temperature catalysts, which can avoid hydrolysis caused by contact with water vapor in the air at high temperature, resulting in a decrease in its mechanical properties. And through experimental test results, it can be found that the recycled board can greatly retain more than 80% of the mechanical properties of the original material.

Description of the Drawings

[0017] Figure 1 is a flow chart of a method for recycling polycarbonate containing carbon fiber according to the present invention.

Detailed Embodiments

[0018] To further elaborate on the technical means and effects adopted by the present invention, the following describes it in detail in combination with the embodiments and the accompanying drawings of the present invention.

[0019] The present invention provides a method for recycling polycarbonate containing carbon fiber, including the following steps:

[0020] S1: Material selection: Select the required amount of PIR (Post Industrial Recycled) polycarbonate carbon fiber plastic.

[0021] S2: Crushing: Send the selected plastic into a crusher for crushing.

[0022] S3: Shaping: After sending the crushed material into a vacuum internal mixer for kneading, compressing, and shaping, soften it again and reshape it.

[0023] S4: Granulation: Directly send the softened polycarbonate plastic mass containing carbon fiber into an extruder for re - granulation and shaping.

[0024] S5: Re - granulation: Perform the granulation action again through a cooling water tank and a pelletizer.

[0025] S6: Taking pellets: Take out the pellets after re - granulation to obtain the recycled plastic.

[0026] Among them, the PIR polycarbonate carbon fiber plastic can be selected to contain 80% polycarbonate and 20% carbon fiber waste in it.

[0027] Among them, the extruder can be a single - screw extruder.

[0028] Inject the recycled material pellets and the selected raw material pellets on an injection molding machine to form standard test specimens. According to the mechanical properties of the materials obtained from the standard tests, the test results are shown in Table 1:

[0029] Table 1 Test Results

[0030]

[0031]

[0032] In addition, the present invention also provides a recycled board, and the board is the board recycled by the method of recycling polycarbonate containing carbon fiber as described above.

[0033] The beneficial effects of the present invention are as follows: The present invention is a method for recycling polycarbonate containing carbon fiber and the recycled board thereof. Through the methods of crushing, shaping, granulation, and re - granulation, its mechanical properties can be simply and greatly retained. And in the present invention, there is no need to recycle carbon fiber through a high - temperature catalyst, which can avoid hydrolysis caused by contact with water vapor in the air at high temperature, resulting in a decrease in its mechanical properties. And through the experimental test results, it can be found that the recycled board can greatly retain more than 80% of the mechanical properties of the original material.

[0034] It should be noted that the present invention is not limited to the above - mentioned embodiments. Any simple modifications, equivalent changes, and decorations made by any person skilled in the relevant art to the above - mentioned embodiments based on the technical solutions of the present invention all fall within the protection scope of the present invention.

Claims

1. A method for recovering carbon fiber-containing polycarbonate, characterized in that: It includes the following steps: S1: Material selection: Select the required amount of PIR polycarbonate carbon fiber plastic; S2: Crushing: feeding the selected plastic into a crusher for crushing; S3: Shaping: The crushed material is sent to a vacuum mixer for kneading, compression and shaping, and then softened and reshaped; S4: Granulation: The softened polycarbonate plastic mass containing carbon fiber is directly fed into the extruder for re-granulation and shaping; S5: Re-granulation: Granulation is performed again through the cooling water tank and the pelletizer; S6: Pelletizing: The re-granulated particles are taken out to obtain the recycled plastic.

2. A method for recovering carbon fiber-containing polycarbonate according to claim 1, characterized in that: The PIR polycarbonate carbon fiber plastic can be selected from 80% polycarbonate and 20% carbon fiber waste.

3. A method for recovering carbon fiber-containing polycarbonate according to claim 1, characterized in that: The extruder can be a single screw extruder.

4. A plate, characterized in that: The plate is a plate recovered by the method for recovering carbon fiber-containing polycarbonate according to any one of claims 1 to 3.

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