A ceramified polyolefin material and a method for its production

Abstract

The application provides a ceramization polyolefin material and a preparation method thereof, wherein the raw materials include the following components by weight: 35-45 parts of polyolefin resin, 45-65 parts of ceramization powder and 1-10 parts of reinforcing agent; the ceramization polyolefin material of the application can quickly occur ceramization reaction at low temperature by adding a specific proportion of self-made ceramization powder, and form a ceramic body with stable morphology and high ceramization strength; and the prepared composite material has better flame retardant effect, and the dependence on excessive traditional flame retardants is minimized; this reduces the negative influence on the ceramization strength of the ceramization polyolefin material, and simultaneously efficiently improves the flame retardant performance.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of ceramic polyolefin materials and its preparation method, in particular to a kind of ceramic polyolefin materials and its preparation method of ceramic powder containing hexaphenoxyl cyclophosphazene. BACKGROUND

[0002] At present, traditional flame-retardant polymer materials cannot meet the growing practical needs due to their limitations. As a new type of flame-retardant material, ceramic polymer composites have the same performance as ordinary polymer materials at room temperature and can form a dense and hard ceramic layer at high temperature to hinder the further spread of fire. Therefore, ceramic polymer composites have been widely studied in cables and insulated wires, transportation, construction and nuclear industry. Ceramic polymer composites can be divided into two categories: ceramic silicone rubber and ceramic polyolefin. The most studied is ceramic silicone rubber, which has advantages in electrical insulation, ceramic residual rate and ceramic strength, but the cost is high and the process is difficult to control. Ceramic polyolefin materials have low cost and high production efficiency. Therefore, researchers have begun to study ceramic polyolefin more. Ceramic silicone rubber materials can be replaced in the role of wire and cable, and have broad application prospects.

[0003] The addition of ceramic powder is a necessary prerequisite for the ceramicization of ceramic polyolefin materials after burning, and is also the key to flame retardation, so the selection of ceramic powder is crucial. However, most ceramic polyolefin materials simply introduce inorganic fillers as ceramic powder, which has low ceramic strength at low temperature. In order to obtain the performance similar to porcelain, these materials need high temperature, usually more than 1000℃.

[0004] In addition, the sintering of ceramic powder is a continuous densification process. In traditional sintering methods, the higher the sintering temperature and the longer the sintering time, the greater the densification degree and the better the mechanical properties. How to control the sintering process of ceramic, reduce the sintering temperature, greatly shorten the sintering time, and realize low-temperature rapid sintering is also a big problem of ceramic polyolefin materials.

[0005] The flame-retardant performance of ceramic polyolefin is also a very important indicator, but traditional flame retardants need a very large amount of addition to improve the flame-retardant effect. And this high amount of addition will have a negative impact on the ceramic strength of the composite. Therefore, it is undoubtedly very difficult to prepare ceramic polyolefin composites with high flame retardancy, low-temperature rapid sintering and high ceramic strength. SUMMARY

[0006] To solve the above problems, the application provides a kind of ceramization polyolefin material and its preparation method, preparation process is simple, production cost is lower, by introducing a new type of porcelain powder specially designed for ceramization polyolefin material, so that ceramization polyolefin material can quickly occur at low temperature Ceramization reaction, form stable morphology and high porcelain strength ceramic body.In addition, the specific proportion of flame retardant hexaphenoxycyclophosphazene and aluminum hydroxide in porcelain powder is compounded, which maximizes the dependence on excess traditional flame retardants.This reduces the negative impact on the porcelain strength of ceramization polyolefin material, while improving its flame retardant performance.

[0007] To solve the above problems, the application adopts the technical scheme as follows:

[0008] A kind of ceramization polyolefin material, the ceramization polyolefin material is made of the following mass parts of each raw material:

[0009] Polyolefin resin 35-45 parts

[0010] Porcelain powder 55-65 parts

[0011] Reinforcing agent 1-5 parts

[0012] The polyolefin resin is one of low-density linear polyethylene, ethylene-vinyl acetate and polyolefin elastomer (preferably low-density linear polyethylene);

[0013] The porcelain powder is a mixture of low-melting point glass powder, wollastonite fiber, hexaphenoxycyclophosphazene and aluminum hydroxide in a mass ratio of 4:3-3.1:1.8-2:1-1.2;The low-melting point glass powder is a phosphate glass powder with a melting point of 400 DEG C (FR0135 of Ami Micro-nano New Material Co., Ltd. in an embodiment of the application).

[0014] The mass ratio of low-melting point glass powder, wollastonite fiber, hexaphenoxycyclophosphazene and aluminum hydroxide can be 4:3:1.8:1.2, 4:3:1.9:1.1, 4:3:2:1, 4:3.1:

[0015] 1.8:1.2, 4:3.1:1.9:1.1 or 4:3:2:1, etc.

[0016] Further, the reinforcing agent is one or a mixture of several of white carbon black, calcium carbonate and glass fiber, preferably calcium carbonate.

[0017] Preferably, the ceramization flame retardant material according to the application is made of the following mass parts of each raw material:

[0018] Polyolefin resin 40 parts

[0019] Porcelain powder 60 parts

[0020] Reinforcing agent 1 part

[0021] The organic polymer is low-density linear polyethylene or ethylene-vinyl acetate; the reinforcing agent is calcium carbonate.

[0022] Preferably, the vitrification powder is a mixture of low-melting glass powder, wollastonite mineral fiber, hexaphenoxy cyclotriphosphazene and aluminum hydroxide in a mass ratio of 4:3:2:1.

[0023] The application also provides a preparation method of the ceramicized polyolefin material, which comprises the following steps: uniformly mixing a first amount of polyolefin resin and a first amount of vitrification powder by stirring, adding a second amount of reinforcing agent, uniformly mixing the mixture by stirring again, extruding and granulating, drying, and injection molding to obtain the ceramicized polyolefin material.

[0024] In an embodiment of the application, the first stirring and mixing is performed in a high-speed mixer at a temperature of 40℃ for 15min at a speed of 600r / min; the second stirring and mixing is performed in a high-speed mixer at a temperature of 60℃ for 25min at a speed of 600r / min.

[0025] In an embodiment of the application, the extruding and granulating is performed in a twin-screw extruder at a temperature of 120-140℃, for example, the temperature of the extruder is 120℃, 125℃, 130℃, 135℃ or 140℃, etc.

[0026] Further, the drying is performed at a temperature of 50-70℃ for 30-50min, for example, the temperature of the drying is 50℃, 55℃, 60℃, 65℃ or 70℃, etc., and the time of the drying is 30min, 35min, 40min, 45min or 50min, etc.

[0027] Further, the injection molding is performed by using an injection molding machine at a temperature of 140-160℃, for example, the temperature of the injection molding machine is 140℃, 145℃, 150℃, 155℃ or 160℃, etc.

[0028] Compared with the prior art, the application has the following advantages:

[0029] (1) The application provides a ceramicized polyolefin material and a preparation method thereof, which has a simple preparation process and low production cost. By introducing a new type of vitrification powder specially designed for the ceramicized polyolefin material, the sintering time required for the ceramicization reaction is greatly reduced, so that the ceramicized polyolefin material can rapidly undergo the ceramicization reaction within 10min at a low temperature to form a ceramic body with stable morphology and high ceramic strength.

[0030] (2) The specific flame retardant hexaphenoxycyclotriphosphazene in the porcelainizing powder has a unique P, N hybrid structure, and a high content of phenoxy group effectively provides a carbon source to effectively promote the carbonization of the polyolefin resin during the thermal oxidative decomposition process, while generating a difficult-to-decompose P-O-P cross-linked product, thereby improving the residual rate at high temperature. When compounded with aluminum hydroxide, the dependence on excessive traditional flame retardants is minimized. This reduces the negative impact on the porcelain strength of the porcelainized polyolefin material, while efficiently improving its flame retardant performance.

[0031] (3) The melting point of hexaphenoxycyclotriphosphazene is relatively low, so that the addition of hexaphenoxycyclotriphosphazene in the porcelainizing powder can increase the flowability of the material. Without adding any lubricant, the material can be smoothly extruded at an extruder temperature of 120-130 degrees, thereby improving the processing performance of the porcelainized polyolefin material. DETAILED DESCRIPTION

[0032] The application will be further described below in conjunction with specific examples, but the protection scope of the application is not limited thereto.

[0033] Example 1

[0034] The low-density linear polyethylene 40 parts (Yuyao Qihong Plastic Co., Ltd., model DFDA-7042), 60 parts of porcelainizing powder of phosphoric acid salt glass powder (FR0135, Anmi Micro-nano New Material Co., Ltd.) with a melting point of 400℃, wollastonite fiber (Changzhou Rongao New Material Co., Ltd.), hexaphenoxycyclotriphosphazene (HT-207, Jinan Ruilin Firefighting Equipment Co., Ltd.) and aluminum hydroxide (ATH-1T, Shenzhen Haiyang Powder Co., Ltd.) with a mass ratio of 4:3:2:1 were weighed by parts by weight, and were put into a high-speed stirrer for pre-mixing (temperature 40℃, time 15min, speed 600r / min) to make the powder mixture uniform, then 1 part of calcium carbonate (Shandong Taijun Trade Co., Ltd.) was added and mixed (temperature 60℃, time 25min, speed 600r / min) to obtain the mixture of the porcelainized flame-retardant material. The mixture of the porcelainized flame-retardant material was moved to a twin-screw extruder, and the processing temperature of each section of the extruder was 125℃ for the first section, 130℃ for the second section, 130℃ for the third section, 130℃ for the fourth section, 130℃ for the fifth section, 125℃ for the die head, and 130℃ for the melt. The particles were extruded and granulated, then dried at a temperature of 55℃ for 50min. The dried particles were put into an injection molding machine, and the temperature of each section of the injection molding machine was 140℃, 140℃, 140℃, 140℃, and 145℃, respectively. After injection molding, the porcelainized polyolefin material sample was taken out for testing.

[0035] Example 2

[0036] The ethylene-vinyl acetate 40 parts (Yuyao Changling Plastic Co., Ltd., model 7470M), 60 parts of phosphate glass powder (FR0135, Anmi Micro-nano New Material Co., Ltd.) with a melting point of 400℃, wollastonite fiber (Changzhou Rongao New Material Co., Ltd.), hexaphenoxycyclophosphazene (HT-207, Jinan Ruilin Firefighting Equipment Co., Ltd.) and aluminum hydroxide (ATH-1T, Shenzhen Haiyang Powder Co., Ltd.) with a porcelain powder in a mass ratio of 4:3:2:1 by weight parts were put into a high-speed mixer for pre-mixing (temperature 40℃, time 15min, speed 600r / min) to make the powder mixture uniform, then 1 part of calcium carbonate (Shandong Taijun Trade Co., Ltd.) was added and mixed (temperature 60℃, time 25min, speed 600r / min) to obtain the mixture of the ceramic flame retardant material. The ceramic flame retardant material mixture was moved to a twin-screw extruder, the processing temperature of each section of the extruder was 125℃ for zone 1, 130℃ for zone 2, 130℃ for zone 3, 130℃ for zone 4, 130℃ for zone 5, 125℃ for the head, 130℃ for the melt, and the melt was extruded and granulated. Then the particles were dried, the drying temperature was 55℃, the drying time was 50min, and the dried particles were put into an injection molding machine, the temperature of each zone of the injection molding machine was 140℃, 140℃, 140℃, 140℃, 145℃ respectively, and the ceramic polyolefin material sample was taken out after injection molding for testing.

[0037] Example 3

[0038] The low-density linear polyethylene 35 parts (Yuyao Qihong Plastic Co., Ltd., model DFDA-7042), 65 parts of phosphate glass powder (FR0135, Anmi Micro-nano New Material Co., Ltd.) with a melting point of 400℃, wollastonite fiber (Changzhou Rongao New Material Co., Ltd.), hexaphenoxycyclophosphazene (HT-207, Jinan Ruilin Firefighting Equipment Co., Ltd.) and aluminum hydroxide (ATH-1T, Shenzhen Haiyang Powder Co., Ltd.) with a porcelain powder in a mass ratio of 4:3:2:1 by weight parts were put into a high-speed mixer for pre-mixing (temperature 40℃, time 15min, speed 600r / min) to make the powder mixture uniform, then 2 parts of calcium carbonate (Shandong Taijun Trade Co., Ltd.) was added and mixed (temperature 60℃, time 25min, speed 600r / min) to obtain the mixture of the ceramic flame retardant material. The ceramic flame retardant material mixture was moved to a twin-screw extruder, the processing temperature of each section of the extruder was 125℃ for zone 1, 130℃ for zone 2, 130℃ for zone 3, 130℃ for zone 4, 130℃ for zone 5, 125℃ for the head, 130℃ for the melt, and then extrusion granulation was performed. The particles were then dried at a temperature of 55℃ for 50min. The dried particles were placed in an injection molding machine, and the temperature of each zone of the injection molding machine was 140℃, 140℃, 140℃, 140℃, and 145℃, respectively. After injection molding, the ceramic polyolefin material sample was taken out for testing.

[0039] Example 4

[0040] The ethylene-vinyl acetate 35 parts (Yuyao Changling Plastic Co., Ltd., model 7470M), 65 parts of phosphate glass powder (FR0135, Anmi Micro-nano New Material Co., Ltd.) with a melting point of 400℃, wollastonite mineral fiber (Changzhou Rongao New Material Co., Ltd.), hexaphenoxycyclophosphazene (HT-207, Jinan Ruilin Firefighting Equipment Co., Ltd.) and aluminum hydroxide (ATH-1T, Shenzhen Haiyang Powder Co., Ltd.) ceramic powder with a mass ratio of 4:3:2:1 were weighed by parts by weight, put into a high-speed mixer for pre-mixing (temperature 40℃, time 15min, speed 600r / min), so that the powder was uniformly mixed, then 2 parts of calcium carbonate (Shandong Taijun Trade Co., Ltd.) was added, and the mixing was continued (temperature 60℃, time 25min, speed 600r / min) to obtain the mixture of the ceramic flame retardant material. The ceramic flame retardant material mixture was moved to a twin-screw extruder, the processing temperature of each section of the extruder was 125℃ for zone 1, 130℃ for zone 2, 130℃ for zone 3, 130℃ for zone 4, 130℃ for zone 5, 125℃ for the head, 130℃ for the melt, and the melt was extruded and granulated. Then the particles were dried, the drying temperature was 55℃, the drying time was 50min, the dried particles were put into an injection molding machine, the temperature of each zone of the injection molding machine was 140℃, 140℃, 140℃, 140℃, 145℃ respectively, and the ceramic polyolefin material sample was taken out after injection molding for testing.

[0041] Example 5

[0042] The low-density linear polyethylene 45 parts (Yuyao Qihong Plastic Co., Ltd., model DFDA-7042), 55 parts of phosphate glass powder (FR0135, Anmi Micro-nano New Material Co., Ltd.) with a melting point of 400℃, wollastonite fiber (Changzhou Rongao New Material Co., Ltd.), hexaphenoxycyclophosphazene (HT-207, Jinan Ruilin Firefighting Equipment Co., Ltd.) and aluminum hydroxide (ATH-1T, Shenzhen Haiyang Powder Co., Ltd.) with a porcelain powder in a weight ratio of 4:3:2:1 were weighed and put into a high-speed mixer for pre-mixing (temperature 40℃, time 15min, speed 600r / min) to make the powder mixture uniform, then 2 parts of calcium carbonate (Shandong Taijun Trade Co., Ltd.) was added and mixed (temperature 60℃, time 25min, speed 600r / min) to obtain the mixture of the ceramic flame retardant material. The ceramic flame retardant material mixture was moved to a twin-screw extruder, the processing temperature of each section of the extruder was 125℃ for zone 1, 130℃ for zone 2, 130℃ for zone 3, 130℃ for zone 4, 130℃ for zone 5, 125℃ for the head, 130℃ for the melt, and then extrusion granulation was performed. The particles were then dried at a temperature of 55℃ for 50min. The dried particles were placed in an injection molding machine, and the temperature of each zone of the injection molding machine was 140℃, 140℃, 140℃, 140℃, and 145℃, respectively. After injection molding, the ceramic polyolefin material sample was taken out for testing.

[0043] Example 6

[0044] The ethylene-vinyl acetate 45 parts (Yuyao Changling Plastic Co., Ltd., model 7470M), 55 parts of phosphate glass powder (FR0135, Anmi Micro-nano New Material Co., Ltd.) with a melting point of 400℃, wollastonite mineral fiber (Changzhou Rongao New Material Co., Ltd.), hexaphenoxycyclophosphazene (HT-207, Jinan Ruilin Firefighting Equipment Co., Ltd.) and aluminum hydroxide (ATH-1T, Shenzhen Haiyang Powder Co., Ltd.) ceramic powder with a mass ratio of 4:3:2:1 were weighed by parts by weight, put into a high-speed mixer for pre-mixing (temperature 40℃, time 15min, speed 600r / min), so that the powder was uniformly mixed, then 2 parts of calcium carbonate (Shandong Taijun Trade Co., Ltd.) was added, and the mixing was continued (temperature 60℃, time 25min, speed 600r / min) to obtain the mixture of the ceramic flame retardant material. The ceramic flame retardant material mixture was moved to a twin-screw extruder, the processing temperature of each section of the extruder was 125℃ for zone 1, 130℃ for zone 2, 130℃ for zone 3, 130℃ for zone 4, 130℃ for zone 5, 125℃ for the head, 130℃ for the melt, and the melt was extruded and granulated. Then the particles were dried, the drying temperature was 55℃, the drying time was 50min, the dried particles were put into an injection molding machine, the temperature of each zone of the injection molding machine was 140℃, 140℃, 140℃, 140℃, 145℃ respectively, and the ceramic polyolefin material sample was taken out after injection molding for testing.

[0045] Example 7

[0046] 40 parts by weight of low-density linear polyethylene (Yuyao Qihong Plastics Co., Ltd., model DFDA-7042), 60 parts of phosphate glass powder with a melting point of 400°C (FR0135, Anmi Micro-Nano New Materials Co., Ltd.) in a mass ratio of 4:3.1:1.8:1.2, wollastonite mineral fiber (Changzhou Rongao Chemical New Materials Co., Ltd.), hexaphenoxy cyclotriphosphazene (HT-207, Jinan Ruilin Fire Fighting Equipment Co., Ltd.) and ceramic powder of aluminum hydroxide (ATH-1T, Shenzhen Haiyang Powder Co., Ltd.) were put into a high-speed blender for pre-mixing (temperature 40°C, time 15 min, speed 600 r / min) to make the powders uniformly mixed, and then 1 part of calcium carbonate (Shandong Taijun Industry and Trade Co., Ltd.) was added. Co., Ltd.), continue mixing (temperature 60°C, time 25 min, speed 600 r / min) to obtain the ceramic flame retardant material mixture, move the ceramic flame retardant material mixture into a twin-screw extruder, the processing temperature of each section of the extruder is 125°C in zone 1, 130°C in zone 2, 130°C in zone 3, 130°C in zone 4, 130°C in zone 5, 125°C in die head, 130°C in melt, extrusion granulation, and then drying the particles at a drying temperature of 55°C and a drying time of 50 min. The dried particles are placed in an injection molding machine, and the temperatures of each zone of the injection molding machine are 140°C, 140°C, 140°C, 140°C, and 145°C, respectively. After injection molding, ceramic polyolefin material strips are taken out for testing.

[0047] Example 8

[0048] The ethylene-vinyl acetate 40 parts (Yuyao Changling Plastic Co., Ltd., model 7470M), 60 parts of the mixture of phosphoric acid salt glass powder (FR0135, Anmi Micro-nano New Material Co., Ltd.) with a melting point of 400℃, wollastonite fiber (Changzhou Rongao New Material Co., Ltd.), hexaphenoxycyclophosphazene (HT-207, Jinan Ruilin Firefighting Equipment Co., Ltd.) and aluminum hydroxide (ATH-1T, Shenzhen Haiyang Powder Co., Ltd.) with a mass ratio of 4:3.1:1.8:1.2, and calcium carbonate 1 part (Shandong Taijun Trade Co., Ltd.) were weighed by weight parts, pre-mixed in a high-speed mixer (temperature 40℃, time 15min, speed 600r / min) to make the powder mixture uniform, then calcium carbonate 1 part (Shandong Taijun Trade Co., Ltd.) was added and mixed (temperature 60℃, time 25min, speed 600r / min) to obtain the mixture of the ceramicized flame retardant material. The ceramicized flame retardant material mixture was moved to a twin-screw extruder, and the processing temperature of each section of the extruder was 125℃ for zone 1, 130℃ for zone 2, 130℃ for zone 3, 130℃ for zone 4, 130℃ for zone 5, 125℃ for the die head, and 130℃ for the melt. The particles were extruded and granulated, then dried at a temperature of 55℃ for 50min. The dried particles were placed in an injection molding machine, and the temperature of each zone of the injection molding machine was 140℃, 140℃, 140℃, 140℃, and 145℃, respectively. After injection molding, the ceramicized polyolefin material sample was taken out for testing.

[0049] Comparative Example 1

[0050] Other operations are the same as Example 1, the only difference is that the ceramic powder is composed of a mixture of phosphoric acid salt glass powder (FR0135, Anmi Micro-nano New Material Co., Ltd.), wollastonite fiber (Changzhou Rongao New Material Co., Ltd.), and hexaphenoxycyclophosphazene (HT-207, Jinan Ruilin Firefighting Equipment Co., Ltd.) with a mass ratio of 4:3:3 and a melting point of 400℃.

[0051] Comparative Example 2

[0052] Other operations are the same as example 1, the difference between this example and example 1 is that the porcelain powder is composed of a mixture of phosphate glass powder (FR0135, Anmi Micro-nano New Materials Co., Ltd.) with a melting point of 400℃, wollastonite fiber (Changzhou Rongao New Material Co., Ltd.) and aluminum hydroxide (ATH-1T, Shenzhen Haiyang Powder Co., Ltd.) with a mass ratio of 4:3:3. The flowability of the ceramic flame retardant material mixture is poor due to the lack of polyphosphazene, which cannot be quickly extruded at low temperature, so higher extrusion and injection molding temperature is required. The processing temperature of each section of the extruder is zone 1 165℃, zone 2 175℃, zone 3 175℃, zone 4 175℃, zone 5 170℃, head 175℃, melt 170℃, and the temperature of each zone of the injection molding machine is 170℃, 175℃, 175℃, 175℃, 175℃, respectively.

[0053] Comparative example 3

[0054] Other operations are the same as example 1, the difference between this example and example 1 is that the porcelain powder is composed of a mixture of phosphate glass powder (FR0135, Anmi Micro-nano New Materials Co., Ltd.) with a melting point of 400℃ and wollastonite fiber (Changzhou Rongao New Material Co., Ltd.) with a mass ratio of 4:3. The flowability of the ceramic flame retardant material mixture is poor due to the lack of polyphosphazene, which cannot be quickly extruded at low temperature, so higher extrusion and injection molding temperature is required. The processing temperature of each section of the extruder is zone 1 165℃, zone 2 175℃, zone 3 175℃, zone 4 175℃, zone 5 170℃, head 175℃, melt 170℃, and the temperature of each zone of the injection molding machine is 170℃, 175℃, 175℃, 175℃, 175℃, respectively.

[0055] Comparative example 4

[0056] Other operations are the same as example 1, the only difference is that the porcelain powder is composed of a mixture of phosphate glass powder (FR0135, Anmi Micro-nano New Materials Co., Ltd.) with a melting point of 400℃, wollastonite fiber (Changzhou Rongao New Material Co., Ltd.), hexachlorotriphosphazene (Hangzhou Bangyi Chemical Co., Ltd.) and aluminum hydroxide (ATH-1T, Shenzhen Haiyang Powder Co., Ltd.) with a mass ratio of 4:3:2:1. In addition, the flowability of the ceramic flame retardant material mixture added with hexachlorotriphosphazene (Hangzhou Bangyi Chemical Co., Ltd.) is poorer than that added with hexaphenoxycyclophosphazene (HT-207, Jinan Ruilin Fire Equipment Co., Ltd.), so the extrusion and injection molding temperature needs to be increased. The processing temperature of each section of the extruder is zone 1 140℃, zone 2 145℃, zone 3 145℃, zone 4 145℃, zone 5 140℃, head 140℃, melt 145℃, and the temperature of each zone of the injection molding machine is 150℃, 150℃, 150℃, 150℃, 155℃, respectively.

[0057] The ceramic polyolefin materials prepared in Examples 1-6 and Comparative Examples 1-4 were subjected to performance tests, and the test results are shown in Table 1.

[0058] The test standards are as follows:

[0059] The test standard for oxygen index was in accordance with GB / T 2406.1, and the test standard for vertical burning experiment was in accordance with GB / T 2408.

[0060] Table 1: Performance test results of ceramic polyolefin materials prepared in Examples 1-4 and Comparative Examples 1-4

[0061]

[0062]

[0063] As can be seen from Table 1, compared with the ceramic polyolefin materials prepared by adding ordinary ceramic powder, the ceramic polyolefin materials prepared by introducing the new ceramic powder can rapidly undergo ceramic reaction to form ceramic bodies with stable morphology and bending strength greater than 10 MPa after sintering at 600 ℃ for 10 min. Even at 400 ℃, the ceramic polyolefin materials still retain considerable strength and morphology. In addition, the oxygen index of the ceramic polyolefin materials is more than 30%, and the vertical burning experiment (V-0) is passed, and the flame retardant performance is good.

[0064] Although the present application has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that the scope of protection of the present application is not limited to the description of the above embodiments, and various changes in form and details can be made within the scope of the claims.

Claims

1. A ceramic polyolefin material, characterized in that The ceramic polyolefin material is made of the following raw materials in parts by mass: 35~45 parts of polyolefin resin 55~65 parts of porcelain powder 1~5 parts of reinforcing agent The polyolefin resin is one of low-density linear polyethylene and ethylene vinyl acetate; the porcelain powder is a mixture of low-melting-point glass powder, wollastonite mineral fiber, hexaphenoxycyclotriphosphazene and aluminum hydroxide in a mass ratio of 4:3-3.1:1.8-2:1-1.2; the low-melting-point glass powder is phosphate glass powder with a melting point of 400°C.

2. The ceramic polyolefin material according to claim 1, wherein: The reinforcing agent is one or a mixture of white carbon black, calcium carbonate and glass fiber.

3. The ceramic polyolefin material according to claim 1, wherein: The ceramic polyolefin material is made of the following raw materials in parts by mass: 40 parts of polyolefin resin 60 parts of porcelain powder 1 part reinforcing agent The reinforcing agent is calcium carbonate.

4. The ceramic polyolefin material according to any one of claims 1 to 3, wherein: The porcelain powder is a mixture of low-melting-point glass powder, wollastonite mineral fiber, hexaphenoxy cyclotriphosphazene and aluminum hydroxide in a mass ratio of 4:3:2:

1.

5. The preparation method of ceramic polyolefin material as claimed in claim 1, characterized in that The method comprises the following steps: uniformly mixing the polyolefin resin and ceramic powder in a prescribed amount for the first time, adding the reinforcing agent in a prescribed amount, uniformly mixing for a second time, extruding and granulating, drying, and injection molding to obtain the ceramic polyolefin material.

6. The method for preparing a ceramic polyolefin material according to claim 5, wherein: The first stirring and mixing was carried out in a high-speed stirrer at a temperature of 40° C., a time of 15 minutes, and a rotation speed of 600 r / min.

7. The method for preparing a ceramic polyolefin material according to claim 5, wherein: The second stirring and mixing was carried out in a high-speed stirrer at a temperature of 60° C., a time of 25 min, and a rotation speed of 600 r / min.

8. The method for preparing a ceramic polyolefin material according to claim 5, wherein: The extrusion granulation is carried out in a twin-screw extruder at a temperature of 120-140°C.

9. The method for preparing a ceramic polyolefin material according to claim 5, wherein: The drying conditions are: temperature 50-70° C., time 30-50 min.

10. The method for preparing a ceramic polyolefin material according to claim 5, wherein: The injection molding is completed using an injection molding machine at a temperature of 140-160°C.

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