High-transparency low-temperature-resistant polypropylene composite material and preparation method thereof

Abstract

The invention relates to a high-transparency low-temperature-resistant polypropylene composite material which comprises the following raw material components in percentage by weight: 80-85% of polypropylene; 10-15% of a toughening agent; 1.5%-2.5% of a dispersing agent; 1.5%-2.5% of a grafting agent; 0.3%-0.8% of a nucleating agent; 0.6%-1.2% of a compatilizer; 1-1.5% of an auxiliary agent; the polypropylene is homo-polypropylene. According to the high-transparency low-temperature-resistant polypropylene composite material disclosed by the invention, by adopting a specific formula composition, the polypropylene composite material prepared by taking homo-polypropylene as a main body material has excellent characteristics of high transparency and low temperature resistance at the same time, and after a container prepared from the polypropylene composite material is frozen for 2 hours at-40 DEG C, the low temperature resistance of the container is greatly improved. And freezing at-18 DEG C for 48 hours, dropping at the height of 1m, and keeping the container intact.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and particularly relates to a high-transparency and low-temperature-resistant polypropylene composite material and a preparation method thereof. Background Art

[0002] Random copolymer polypropylene can resist low temperature, but has poor transparency. Homopolymer polypropylene has good transparency, but poor low-temperature resistance. At present, there is no homopolymer polypropylene material on the market that can resist low temperature and has high transparency at the same time. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a polypropylene composite material with high transparency and low-temperature resistance, with homopolymer polypropylene as the main material.

[0004] To solve the above technical problem, the present invention adopts the following technical solutions:

[0005] A high-transparency and low-temperature-resistant polypropylene composite material, calculated by weight percentage, the polypropylene composite material comprises the following raw material components:

[0006]

[0007] The polypropylene is homopolymer polypropylene.

[0008] In some embodiments, the preferred weight percentages are as follows:

[0009]

[0010]

[0011] According to some preferred embodiments of the present invention, the homopolymer polypropylene includes Tianjin Petrochemical T5015M.

[0012] According to some preferred embodiments of the present invention, the toughening agent includes Vistamaxx 6502 and / or POE9061; the dispersant includes EBS; the nucleating agent includes NP508; the grafting agent includes PE-a-MAH; the compatibilizer includes PVA 205.

[0013] According to some preferred embodiments of the present invention, the auxiliary agent includes an antioxidant and / or an antifogging agent.

[0014] According to some preferred embodiments of the present invention, the antioxidant includes RC PEP 36; the antifogging agent includes oleic acid amide.

[0015] Specifically, in some embodiments, calculated by weight percentage, the polypropylene composite material comprises the following raw material components:

[0016]

[0017] According to some preferred implementation aspects of the present invention, after the polypropylene composite material is made into a container, the container is filled with a medium, frozen at -40°C for 2 hours, then frozen at -18°C for 48 hours, and dropped from a height of 1 meter, and the container remains intact.

[0018] The present invention also provides a method for preparing the above polypropylene composite material, comprising the following steps:

[0019] Mix polypropylene, toughening agent, dispersant, grafting agent, nucleating agent, compatibilizer, and auxiliary agent evenly;

[0020] Place the mixed material in an extruder, and carry out melt extrusion granulation to obtain slices of the polypropylene composite material.

[0021] According to some preferred implementation aspects of the present invention, during granulation, the temperature of the extruder is set as follows: the temperature of zone 1 is 165 - 175°C, the temperature of zone 2 is 170 - 180°C, the temperature of zone 3 is 175 - 185°C, the temperature of zone 4 is 185 - 195°C, the temperature of zone 5 is 185 - 195°C, the temperature of zone 6 is 195 - 205°C, the temperature of zone 7 is 205 - 215°C, the temperature of zone 8 is 215 - 225°C, the temperature of the die head is 225 - 235°C, and the melt temperature is 190 - 200°C. The preferred temperature is: the temperature of zone 1 is 170°C, the temperature of zone 2 is 175°C, the temperature of zone 3 is 180°C, the temperature of zone 4 is 190°C, the temperature of zone 5 is 190°C, the temperature of zone 6 is 200°C, the temperature of zone 7 is 210°C, the temperature of zone 8 is 220°C, the temperature of the die head is 230°C, and the melt temperature is 195°C.

[0022] According to some preferred implementation aspects of the present invention, it includes the step of preparing a polypropylene composite sheet by melt extrusion of the slices of the polypropylene composite material: the screw temperature during extrusion is set as 190 - 200°C for the feeding section, 200 - 210°C for the melting section, and 205 - 215°C for the extrusion section; the temperature of the three rollers is set as 20 - 24°C for the upper roller, 21 - 25°C for the middle roller, and 24 - 28°C for the lower roller, and the speed is set as 9 - 10 m / min. The preferred screw temperature is set as 195°C for the feeding section, 205°C for the melting section, and 210°C for the extrusion section; the temperature of the three rollers is set as 22°C for the upper roller, 23°C for the middle roller, and 26°C for the lower roller, and the speed is set as 9.6 m / min.

[0023] According to some preferred implementation aspects of the present invention, it includes the step of preparing a polypropylene composite sheet by injection molding of the slices of the polypropylene composite material: the temperature of the upper mold during injection molding is 290 - 306°C, and the temperature of the lower mold is 291 - 301°C.

[0024] Due to the adoption of the above technical solution, compared with the prior art, the high-transparency and low-temperature-resistant polypropylene composite material of the present invention, by adopting a specific formulation composition, enables the polypropylene composite material prepared with homopolypropylene as the main material to simultaneously have excellent properties of high transparency and low temperature resistance. The container prepared from this polypropylene composite material is frozen at -40°C for 2 hours, then frozen at -18°C for 48 hours, and dropped from a height of 1 meter, and the container remains intact. Detailed Embodiments

[0025] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will provide a detailed description in combination with the specific embodiments of the present application. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0026] The high-transparency and low-temperature-resistant polypropylene composite material of the present invention, by weight percentage, the polypropylene composite material includes the following raw material components:

[0027]

[0028]

[0029] Among them, the polypropylene is homopolypropylene, including Tianjin Petrochemical T5015M; the toughening agent includes Vistamaxx6502 and / or POE 9061; the dispersant includes EBS; the nucleating agent includes NP508; the grafting agent includes PE-a-MAH; the compatibilizer includes PVA205; the auxiliary agent includes an antioxidant and / or an antifogging agent; the antioxidant includes RC PEP 36; the antifogging agent includes oleic acid amide.

[0030] The preferred weight percentages are as follows:

[0031]

[0032] After the above polypropylene composite material is made into a container, the container is filled with a medium, frozen at -40°C for 2 hours, then frozen at -18°C for 48 hours, and dropped from a height of 1 meter, and the container is intact.

[0033] The preparation method of the above polypropylene composite material includes the following steps:

[0034] Mix polypropylene, toughening agent, dispersant, grafting agent, nucleating agent, compatibilizer, and auxiliary agent evenly;

[0035] Place the mixed material in an extruder, and perform melt extrusion granulation to obtain slices of the polypropylene composite material.

[0036] During pelletizing, the temperature settings of the extruder are as follows: the temperature of zone 1 is 165 - 175°C, the temperature of zone 2 is 170 - 180°C, the temperature of zone 3 is 175 - 185°C, the temperature of zone 4 is 185 - 195°C, the temperature of zone 5 is 185 - 195°C, the temperature of zone 6 is 195 - 205°C, the temperature of zone 7 is 205 - 215°C, the temperature of zone 8 is 215 - 225°C, the temperature of the die head is 225 - 235°C, and the melt temperature is 190 - 200°C. The preferred temperatures are: the temperature of zone 1 is 170°C, the temperature of zone 2 is 175°C, the temperature of zone 3 is 180°C, the temperature of zone 4 is 190°C, the temperature of zone 5 is 190°C, the temperature of zone 6 is 200°C, the temperature of zone 7 is 210°C, the temperature of zone 8 is 220°C, the temperature of the die head is 230°C, and the melt temperature is 195°C.

[0037] When preparing polypropylene composite sheets by melt extrusion of the slices of the above polypropylene composite materials, the screw temperatures during the extrusion process are set as follows: the feeding section is 190 - 200°C, the melting section is 200 - 210°C, and the extrusion section is 205 - 215°C; the temperatures of the three rollers are set as follows: the upper roller is 20 - 24°C, the middle roller is 21 - 25°C, and the lower roller is 24 - 28°C, and the speed is set at 9 - 10 m / min. The preferred screw temperature settings are: the feeding section is 195°C, the melting section is 205°C, and the extrusion section is 210°C; the temperatures of the three rollers are set as follows: the upper roller is 22°C, the middle roller is 23°C, and the lower roller is 26°C, and the speed is set at 9.6 m / min.

[0038] When preparing polypropylene composite sheets by injection molding of the slices of polypropylene composite materials, the temperature of the upper mold during the injection molding process is 290 - 306°C, and the temperature of the lower mold is 291 - 301°C.

[0039] Example 1

[0040] The high - transparent and low - temperature - resistant polypropylene composite material in this example, by weight percentage, includes the following raw material components:

[0041]

[0042] The corresponding method for preparing slices of polypropylene composite material includes the following steps:

[0043] Mix polypropylene, toughening agent, dispersant, grafting agent, nucleating agent, compatibilizer, and auxiliary agent evenly;

[0044] Place the mixed materials in an extruder, conduct melt extrusion pelletizing to obtain slices of polypropylene composite material.

[0045] During pelletizing, the temperature settings of the extruder are as follows: the temperature of zone 1 is 170°C, the temperature of zone 2 is 175°C, the temperature of zone 3 is 180°C, the temperature of zone 4 is 190°C, the temperature of zone 5 is 190°C, the temperature of zone 6 is 200°C, the temperature of zone 7 is 210°C, the temperature of zone 8 is 220°C, the temperature of the die head is 230°C, and the melt temperature is 195°C.

[0046] Example 2

[0047] The high-transparency and low-temperature resistant polypropylene composite material in this example, by weight percentage, includes the following raw material components:

[0048]

[0049]

[0050] The preparation method of its corresponding polypropylene composite sheet includes the following steps:

[0051] Mix polypropylene, toughening agent, dispersant, grafting agent, nucleating agent, compatibilizer, and auxiliary agent evenly;

[0052] Place the mixed materials in an extruder and carry out melt extrusion granulation to obtain slices of polypropylene composite material; when granulating, the temperature of the extruder is set as follows: the temperature of the first zone is 175°C, the second zone is 180°C, the third zone is 185°C, the fourth zone is 195°C, the fifth zone is 195°C, the sixth zone is 205°C, the seventh zone is 215°C, the eighth zone is 225°C, the head temperature is 235°C, and the melt temperature is 197°C.

[0053] Melt-extrude the slices of polypropylene composite material to prepare a polypropylene composite sheet. During the extrusion process, the screw temperature is set as 195°C in the feeding section, 205°C in the melting section, and 210°C in the extrusion section; the temperature of the three rolls is set as 22°C for the upper roll, 23°C for the middle roll, and 26°C for the lower roll, and the speed is set as 9.6 m / min.

[0054] Example 3

[0055] The high-transparency and low-temperature resistant polypropylene composite material in this example, by weight percentage, includes the following raw material components:

[0056]

[0057] The preparation method of its corresponding polypropylene composite sheet includes the following steps:

[0058] Mix polypropylene, toughening agent, dispersant, grafting agent, nucleating agent, compatibilizer, and auxiliary agent evenly;

[0059] Place the mixed materials in an extruder and carry out melt extrusion granulation to obtain slices of polypropylene composite material; when granulating, the temperature of the extruder is set as follows: the temperature of the first zone is 165°C, the second zone is 170°C, the third zone is 175°C, the fourth zone is 185°C, the fifth zone is 185°C, the sixth zone is 195°C, the seventh zone is 205°C, the eighth zone is 225°C, the head temperature is 225°C, and the melt temperature is 194°C.

[0060] The slices of the polypropylene composite material are melt-injected to prepare a polypropylene composite sheet. The temperature of the upper mold during the injection process is 300 °C, and the temperature of the lower mold is 298 °C.

[0061] Testing and Results

[0062] The sheet in the above embodiment is used to prepare a cup container, and the container is filled with a medium such as water. After being frozen at -40 °C for 2 hours, then frozen at -18 °C for 48 hours, and placed in a cardboard box and dropped from a height of 1 meter on all six sides, the container remains intact. The specific data is shown in Table 1 below.

[0063] Table 1 Test Data

[0064]

[0065] The high-transparency and low-temperature-resistant polypropylene composite material in the above embodiment, by adopting a specific formulation composition, enables the polypropylene composite material prepared with homopolypropylene as the main material to simultaneously have the excellent properties of high transparency and low temperature resistance. The container prepared from this polypropylene composite material remains intact after being frozen at -40 °C for 2 hours, then frozen at -18 °C for 48 hours, and dropped from a height of 1 meter.

[0066] The above has described the present invention in detail. The purpose is to enable those skilled in this field to understand the content of the present invention and implement it. However, it should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A highly transparent and low-temperature resistant polypropylene composite material, characterized in that: By weight percentage, the polypropylene composite material comprises the following raw material components: The polypropylene is homopolypropylene.

2. The polypropylene composite material according to claim 1, characterized in that: The homopolypropylene includes Tianjin Petrochemical T5015M.

3. The polypropylene composite material according to claim 1, wherein: The toughening agent includes Vistamaxx6502 and / or POE 9061; the dispersant includes EBS; the nucleating agent includes NP508; the grafting agent includes PE-a-MAH; the compatibilizer includes PVA 205.

4. The polypropylene composite material according to claim 1, characterized in that: The auxiliary agent includes antioxidant and / or antifogging agent.

5. The polypropylene composite material according to claim 4, characterized in that: The antioxidant includes RC PEP 36; the antifogging agent includes oleic acid amide.

6. The polypropylene composite material according to any one of claims 1-5, characterized in that: After the polypropylene composite material is made into a container, the container is filled with a medium, frozen at -40°C for 2 hours, then frozen at -18°C for 48 hours, and dropped from a height of 1 meter, and the container remains intact.

7. A method for preparing a polypropylene composite material according to any one of claims 1-6, characterized in that: It includes the following steps: Mix the polypropylene, toughening agent, dispersant, grafting agent, nucleating agent, compatibilizer, and auxiliary agent evenly. Place the mixed material in an extruder and carry out melt extrusion granulation to obtain slices of the polypropylene composite material.

8. The preparation method according to claim 1, characterized in that: When granulating, the temperature of the extruder is set as follows: the temperature of zone 1 is 165-175°C, the temperature of zone 2 is 170-180°C, the temperature of zone 3 is 175-185°C, the temperature of zone 4 is 185-195°C, the temperature of zone 5 is 185-195°C, the temperature of zone 6 is 195-205°C, the temperature of zone 7 is 205-215°C, the temperature of zone 8 is 215-225°C, the temperature of the die head is 225-235°C, and the melt temperature is 190-200°C.

9. The preparation method according to claim 7, characterized in that: It includes the step of preparing a polypropylene composite sheet by melt extrusion of the slices of the polypropylene composite material: the screw temperature during extrusion is set as 190-200°C for the feeding section, 200-210°C for the melting section, and 205-215°C for the extrusion section; the temperature of the three rollers is set as 20-24°C for the upper roller, 21-25°C for the middle roller, and 24-28°C for the lower roller, and the speed is set as 9-10 m / min.

10. The preparation method according to claim 7, characterized in that: It includes the step of preparing a polypropylene composite sheet by injection molding of the slices of the polypropylene composite material: the temperature of the upper mold during injection molding is 290-306°C, and the temperature of the lower mold is 291-301°C.

Images