CN113278224A - Thermal-aging-resistant PP material, preparation method thereof and plastic box - Google Patents
Thermal-aging-resistant PP material, preparation method thereof and plastic box Download PDFInfo
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- CN113278224A CN113278224A CN202110715516.4A CN202110715516A CN113278224A CN 113278224 A CN113278224 A CN 113278224A CN 202110715516 A CN202110715516 A CN 202110715516A CN 113278224 A CN113278224 A CN 113278224A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The application relates to the field of high polymer materials, and particularly discloses a heat-aging-resistant PP material, a preparation method thereof and a plastic box. The heat aging resistant PP material comprises the following raw materials in parts by mass: 40-50 parts of PP, 10-15 parts of PE, 5-10 parts of ABS, 5-9 parts of composite antioxidant, 1-3 parts of compatilizer, 3-7 parts of modified glass fiber, 3-7 parts of calcium carbonate and 1-3 parts of toner; the preparation method comprises the following steps: weighing PP, PE, ABS, a composite antioxidant, a compatilizer, modified glass fiber, calcium carbonate and toner according to a proportion, uniformly mixing the raw materials except the modified glass fiber, putting the raw materials into an extruder, putting the modified glass fiber into the extruder from a fourth section of feeding port, and performing melt extrusion to obtain the heat-aging-resistant PP material. The heat-aging-resistant PP material can be used for preparing a plastic box and has the advantage of heat aging resistance.
Description
Technical Field
The application relates to the field of high polymer materials, in particular to a heat-aging-resistant PP material, a preparation method thereof and a plastic box.
Background
The PP material has good dielectric property and high-frequency insulation property and is not influenced by humidity. The plastic box prepared from the PP material has the characteristics of strong corrosion resistance, no reaction with acid and alkali, durability, water resistance, light weight and the like, and is very convenient to move, unload and transport. The plastic box is cheap and can be molded into different sizes and shapes according to requirements under the influence of materials.
However, the plastic box made of the PP material has shorter service life than a wood box due to the poor heat resistance and easy aging of the PP material.
Disclosure of Invention
In order to improve the heat resistance of the PP material and prolong the service life of the plastic box, the application provides the heat-aging-resistant PP material, the preparation method of the heat-aging-resistant PP material and the plastic box.
In a first aspect, the present application provides a thermal aging resistant PP material, which adopts the following technical scheme:
the heat-aging-resistant PP material comprises the following raw materials in parts by mass:
40-50 parts of PP
10-15 parts of PE
5-10 parts of ABS
5-9 parts of composite antioxidant
1-3 parts of compatilizer
3-7 parts of modified glass fiber
3-7 parts of calcium carbonate
1-3 parts of toner;
the composite antioxidant comprises hindered phenol antioxidant and phosphite antioxidant.
By adopting the technical scheme, the hindered phenol antioxidant can effectively remove carbon free radicals and peroxy radicals, the phosphite antioxidant can effectively remove hydroperoxides, and the hindered phenol antioxidant and the phosphite antioxidant can produce a synergistic effect when being compounded for use so as to improve the heat-resistant aging effect of the PP material and further prolong the service life of plastic products prepared from the material.
Meanwhile, the addition of the calcium carbonate and the modified glass fiber can improve the mechanical property of the PP material, so that the PP material is not easy to damage when being subjected to external force, and the service life of the PP material is prolonged.
The calcium carbonate can be uniformly dispersed in the matrix, and under the action of external force, the silver streaks are easy to generate without being sticky, and more energy is absorbed. The modified glass fiber is prepared by modifying glass fiber, wherein the glass fiber takes Si-O-Si as a skeleton structure, contains a large amount of calcium and sodium oxides, contains a large amount of hydrophilic silanol groups on the surface, and has poor compatibility with a part of PP matrix. By adopting the modified glass fiber, the compatibility of the glass fiber and a PP matrix can be improved by carrying out surface treatment on the glass fiber.
Preferably, the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant is (1-2): 1.
by adopting the technical scheme, when the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant is in the range, the synergistic effect of the hindered phenol antioxidant and the phosphite antioxidant is obvious, and the heat aging resistance of the PP material can be obviously improved.
Preferably, the complex antioxidant further comprises a macromolecular thioether antioxidant.
By adopting the technical scheme, the macromolecular thioether antioxidant can generate a synergistic effect with the hindered phenol antioxidant and the phosphite antioxidant, and the heat-resistant aging performance of the PP material can be further improved under the combined action of the macromolecular thioether antioxidant, the hindered phenol antioxidant and the phosphite antioxidant.
Preferably, the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant to the macromolecular thioether antioxidant is (3-6): 3: (1-2).
By adopting the technical scheme, when the mass ratio of the three components is in the range, the synergistic effect of the three components is obvious, and the heat-resistant aging performance of the PP material can be obviously improved.
Preferably, the modified glass fiber is prepared by modifying glass fiber by a wet method.
By adopting the technical scheme, the dispersibility of the modified glass fiber prepared by wet modification in the PP matrix is superior to that of the glass fiber before modification, the interface bonding force between the glass fiber and the PP matrix is improved and is obviously stronger than that between the glass fiber and the PP matrix, and the modified glass fiber and the PP matrix are tightly bonded and have almost no gaps. The modified glass fiber prepared by wet modification can be added into a matrix to improve the tensile strength of a PP material, so that more energy is required for pulling out and breaking in a PP material system, and stress can be transferred more effectively.
If the glass fiber is directly added into the matrix without wet modification, an obvious gap exists between the glass fiber and the matrix, so that the glass fiber is very easy to crack or be directly pulled out when being subjected to external force.
Preferably, the wet modification comprises the following preparation steps: weighing glass fiber, deionized water, absolute ethyl alcohol and paraffin according to a certain proportion, stirring and heating under the condition of oil bath at 90-95 ℃ for 1.5-2h, then naturally cooling to room temperature and stopping stirring, and drying at 50-60 ℃ for 3-4d to obtain the modified glass fiber.
By adopting the technical scheme, the modified glass fiber prepared under the conditions can form stronger joint surface binding force with a PP matrix, so that the mechanical property of the thermal aging resistant PP material is improved.
Preferably, the content of the paraffin wax is 0.8wt% to 1.2 wt%.
By adopting the technical scheme, when the content of the paraffin is less than 0.8wt%, the modified glass fiber has no obvious modification effect on the heat-aging-resistant PP material. When the content of the paraffin is 0.8wt% -1.1wt%, the modified glass fiber has a good effect of modifying the mechanical properties of the thermal aging resistant PP material, and when the content of the paraffin is 1.0wt%, the modified glass fiber has a best effect of modifying the mechanical properties of the thermal aging resistant PP material. When the content of paraffin wax is continuously increased, the tensile strength of the heat-resistant old PP material is basically not changed.
Preferably, the compatilizer is PP-g-MAH.
By adopting the technical scheme, the interface between the glass fiber and the composite polyolefin can be modified by adding the PP-g-MAH, the framework structure of the PP-g-MAH has a long carbon chain similar to that of PP, and the molecular chain structures of the PP-g-MAH and the PP-g-MAH are similar, so that the PP-g-MAH and the PP-g-MAH can be compatible in chain segment diffusion to form a good PP/glass fiber interface phase.
In a second aspect, the present application provides a method for preparing a thermal aging resistant PP material, which adopts the following technical scheme:
a preparation method of a heat aging resistant PP material comprises the following preparation steps:
s1, weighing PP, PE, ABS, a composite antioxidant, a compatilizer, modified glass fiber, calcium carbonate and toner according to the proportion, and uniformly mixing the raw materials except the modified glass fiber to obtain a mixture;
and S2, feeding the mixture obtained in the step S1 into an extruder, feeding the modified glass fiber into the extruder from a fourth feeding port, and then carrying out melt extrusion to obtain the heat-aging-resistant PP material.
By adopting the technical scheme, the modified glass fiber can be uniformly dispersed in the base material by separately adding the modified glass fiber and other raw materials, so that the thermal aging resistant PP material has excellent thermal aging resistance and mechanical property.
In a third aspect, the present application provides a plastic box, which adopts the following technical solution:
a plastic box is mainly made of the heat aging resistant PP material.
In summary, the present application has the following beneficial effects:
1. because the composite antioxidant system is adopted, the hindered phenol antioxidant can effectively remove carbon free radicals and peroxy radicals, the phosphite antioxidant can effectively remove hydroperoxides, and the hindered phenol antioxidant and the phosphite antioxidant can generate a synergistic effect when being compounded for use, so that the heat aging resistance of the PP material is improved, and the service life of a plastic product prepared from the PP material is prolonged;
2. in the application, wet modification is preferably adopted, the interface bonding force between the modified glass fiber and the PP matrix is stronger than that before the modification, so that the tensile strength of the material is improved;
3. the method has simple process, and the prepared thermal aging resistant PP material has good thermal aging resistance and mechanical property.
Drawings
Fig. 1 is a schematic structural view of the plastic box of the present application.
Description of reference numerals: 1. a housing; 2. an inner core.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples.
In the application, the PP is selected from Shanghai-sourced leaf Biotechnology limited, and the melt index is 2.2g/10 min; PE is selected from Shanghai Yien chemical technology, Inc., and the melt index is 7.3g/10 min; ABS is selected from Shanghai Michelin Biochemical technology, Inc.
Examples of production of modified glass fibers
Preparation example 1
The modified glass fiber is prepared by modifying glass fiber by a wet method, and comprises the following preparation steps: weighing glass fiber, deionized water, absolute ethyl alcohol and paraffin according to a certain proportion, stirring and heating under the condition of oil bath at 90-95 ℃ for 1.5-2h, then naturally cooling to room temperature and stopping stirring, and drying at 50-60 ℃ for 3-4d to obtain the modified glass fiber.
The paraffin content was 0.4 wt%.
Preparation example 2
The present preparation example is different from preparation example 1 only in that the content of paraffin wax is 0.8 wt%.
Preparation example 3
The present preparation example is different from preparation example 1 only in that the content of paraffin wax is 1.0 wt%.
Preparation example 4
The present preparation example is different from preparation example 1 only in that the content of paraffin wax is 1.2 wt%.
Examples
The modified glass fiber prepared in preparation example 3 is selected as the following modified glass fiber except for special description, and the hindered amine antioxidant is antioxidant 1010 and is commercially available; the phosphite antioxidant is TPP selected from Shanghai Michelin Biochemical technology limited; the macromolecular thioether antioxidant is DLTDP selected from Nanjing Bamuda bioscience and technology Limited; the compatilizer is PP-g-MAH selected from Shanghai Ziming reagent factory (Clarmar); carbon black is selected as the toner and is commercially available, and other raw materials are commercially available. The preparation methods of the heat aging resistant PP materials in examples 1 to 7 are the same, except that the raw materials and the amounts thereof are different (see Table 1). The following description will be given by taking example 1 as an example.
The heat-aging-resistant PP material disclosed in embodiment 1 of the application is prepared by the following steps:
s1, weighing PP, PE, ABS, a composite antioxidant, a compatilizer, modified glass fiber, calcium carbonate and toner (the specific dosage is shown in Table 1) in proportion, and putting the raw materials except the modified glass fiber into a high-speed mixer to be uniformly stirred to obtain a mixture;
s2, putting the mixture in the S1 into a double-screw extruder, putting the modified glass fiber into the extruder from a feeding port at the fourth section, setting the average temperature of the extruder to be 200 ℃, the rotating speed of a screw to be 400r/min and the rotating speed of the feeding port to be 200r/min, and then carrying out melt extrusion to obtain the heat-aging-resistant PP material.
TABLE 1
Example 4
This example is based on example 2 and the content of the components in the composite antioxidant is improved.
Examples 4a to 4c differ from example 2 only in that the mass ratio of the hindered amine antioxidant to the phosphite antioxidant in the complex antioxidant was different, the total mass was not changed, and the specific amounts are shown in table 1.
Example 5
This example is based on example 2 and is a modification of the composition of the complex antioxidant.
The examples 5a to 5c are different from the example 2 only in that the composite antioxidant further comprises a macromolecular thioether antioxidant, and the mass ratio of the hindered amine antioxidant, the phosphite antioxidant and the macromolecular thioether antioxidant in the examples 5a to 5c is different, the total mass is not changed, and the specific dosage is shown in table 1.
Example 6
This example selects modified glass fibers prepared in different preparation examples based on example 2.
Example 6a
The present example is different from example 2 only in that the modified glass fiber obtained in preparation example 1 is selected as the modified glass fiber.
Example 6b
The present example is different from example 2 only in that the modified glass fiber obtained in preparation example 2 is selected as the modified glass fiber.
Example 6c
The present example is different from example 2 only in that the modified glass fiber obtained in preparation example 4 is selected as the modified glass fiber.
Comparative example
Comparative example 1
This comparative example varied the composition and amount of the complex antioxidant based on example 3.
Comparative example 1a
The comparative example is different from the example 3 only in that the addition amount of the composite antioxidant is 3kg, and the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant is not changed and is still 2: 1.
comparative example 1b
The comparative example is different from the example 3 only in that the addition amount of the composite antioxidant is 12kg, and the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant is not changed and is still 2: 1.
comparative example 1c
This comparative example differs from example 3 only in that only the hindered amine antioxidant is added to the raw material.
Comparative example 1d
The comparative example differs from example 3 only in that only the phosphite antioxidant was added to the feed.
Comparative example 2
This comparative example changes the modified glass fibers in the raw materials based on example 3.
Comparative example 2a
This comparative example differs from example 3 only in that unmodified glass fibers are used instead of modified glass fibers.
Comparative example 2b
This comparative example differs from example 3 only in that no modified glass fiber was added to the raw materials.
Comparative example 2c
This comparative example differs from example 3 only in that the modified glass fiber was added in an amount of 9 kg.
Comparative example 3
The comparative example differs from example 3 only in that no calcium carbonate was added to the feed.
Comparative example 4
This comparative example differs from example 3 only in that the raw materials were not added with calcium carbonate and modified glass fiber.
Performance test
And drying the prepared heat aging resistant PP material at 100 ℃ for 5 hours, and then performing injection molding to obtain a standard sample strip, wherein the injection molding temperature is set to be 220 ℃.
Thermal aging resistance: carrying out a thermal oxidation accelerated aging test in a constant-temperature air-blowing thermal aging box, putting each group of sample strips into the thermal aging box, setting the aging time to be 600h and the temperature to be 150 ℃, taking out the sample strips when the set time is reached, and testing the performance of the sample strips;
tensile strength: the test was carried out according to ASTM D638-2010 with a tensile rate of 50 mm/min.
TABLE 2
| Tensile Strength/MPa before aging | Tensile Strength/MPa after aging | Difference in tensile Strength/MPa | |
| Example 1 | 72.18 | 56.49 | 15.69 |
| Example 2 | 74.73 | 58.95 | 14.78 |
| Example 3 | 71.09 | 53.81 | 17.28 |
| Example 4a | 73.64 | 57.16 | 16.48 |
| Example 4b | 73.43 | 56.29 | 17.14 |
| Example 4c | 72.52 | 55.16 | 17.36 |
| Example 5a | 74.46 | 59.15 | 15.31 |
| Example 5b | 74.51 | 60.32 | 14.19 |
| Example 5c | 74.64 | 58.85 | 15.79 |
| Example 6a | 72.63 | 57.87 | 14.76 |
| Example 6b | 73.16 | 58.51 | 14.65 |
| Example 6c | 72.91 | 58.18 | 14.73 |
| Comparative example 1a | 70.83 | 50.67 | 20.16 |
| Comparative example 1b | 71.05 | 52.63 | 18.42 |
| Comparative example 1c | 71.11 | 51.6 | 19.51 |
| Comparative example 1d | 71.08 | 48.44 | 22.64 |
| Comparative example 2a | 59.17 | - | - |
| Comparative example 2b | 42.18 | - | - |
| Comparative example 2c | 67.49 | - | - |
| Comparative example 3 | 69.13 | - | - |
| Comparative example 4 | 61.49 | - | - |
As can be seen by combining examples 1-3 with Table 2, the PP material prepared according to the formulation of the present application has good aging resistance, thereby ensuring the usability of the plastic box made of the PP material to a certain extent.
Combining example 2 and examples 4a-4c with Table 2, it can be seen that the thermal aging resistance of the PP material in example 4a is better than that of example 4b, the thermal aging resistance of the PP material in example 4b is better than that of example 4c, and the thermal aging resistance of the PP material in example 4b is worse than that of example 2, which indicates that the mass ratio of the hindered amine antioxidant to the phosphite antioxidant is 4: and 3, the PP material has the best heat aging resistance.
Combining example 2 with examples 5a-5c and combining Table 2, it can be seen that the thermal aging resistance of example 5b is better than that of example 2, the thermal aging resistance of example 2 is better than that of example 5a, the thermal aging resistance of example 5a is better than that of example 5c, and the thermal aging resistance of example 5b is better than that of example 2, indicating that the hindered amine antioxidant, the phosphite antioxidant and the macromolecular thioether antioxidant have synergistic effects.
Combining example 2 and examples 6a-6c with table 2, it can be seen that the content of silicone oil increases in the order of example 6a, example 6b, example 2 and example 6c, but the tensile strength does not improve completely in the order. In example 6a, example 6b and example 2, the tensile strength of the PP material was sequentially improved as the content of the silicone oil was increased, while the tensile strength of the PP material in example 6c was lower than that of example 2.
The reason for this may be: with the increase of the content of the silicone oil, the effect of the modified glass fiber on improving the tensile strength of the PP material is sequentially increased, the content of the silicone oil is continuously increased, and when the content of the silicone oil exceeds 10wt%, the effect of the modified glass fiber on improving the tensile strength of the PP material is reduced on the contrary due to the excessive content of the silicone oil.
Combining example 3 and comparative example 1a and table 2, it can be seen that the thermal aging resistance of the PP material in comparative example 1a is obviously inferior to that of example 3, which indicates that the content of the composite antioxidant in comparative example 1a is too small, resulting in an insignificant effect of improving the thermal aging resistance of the PP material.
Combining example 3 and comparative example 1b with Table 2, it can be seen that the thermal aging resistance of the PP material in comparative example 1b is inferior to that of example 3, indicating that the content of the composite antioxidant in comparative example 1b is too large, which in turn reduces the thermal aging resistance of the PP material.
As can be seen by combining example 3 with comparative examples 1c to 1d and by combining Table 2, the heat aging resistance of the PP materials of comparative example 1c and comparative example 1d is inferior to that of example 3, indicating that the PP materials cannot have good heat aging resistance by using one of the antioxidants alone.
The reason for this is that: phenolic antioxidants can capture various free radicals generated in the oxidation process so as to inhibit the aging rate, and phosphite antioxidants do not have the capability of capturing peroxide free radicals but can prevent the polymer degradation phenomenon caused by the autoxidation reaction by decomposing hydroperoxide.
By combining example 3 and comparative examples 2a-2b and table 2, it can be seen that the tensile strength of the PP material in comparative example 2a is lower than that of the PP material in example 3, and the tensile strength of the PP material in comparative example 2b is significantly lower than that of the PP material in example 3, which indicates that the modified glass fiber can improve the mechanical properties of the PP material, and the effect of the modified glass fiber on improving the mechanical properties of the PP material is better than that of the unmodified glass fiber.
Combining example 3 and comparative example 2c with table 2, it can be seen that the tensile strength of the PP material in comparative example 2c is lower than that of the PP material in example 3, which indicates that when the amount of the modified glass fiber is too much, the mechanical properties of the PP material are rather reduced.
Combining example 3 and comparative examples 3-4 and table 2, it can be seen that the tensile strength of the PP material in comparative example 3 is less than that of the PP material in example 3, but the tensile strength of the PP material in comparative example 3 is greater than that of comparative example 2b, and the tensile strength of the PP material in comparative example 4 is significantly less than that of the PP material in comparative example 3, indicating that calcium carbonate and the modified fiber have a synergistic effect, and when both are added together, the mechanical properties of the PP material can be significantly improved.
Application example
Referring to fig. 1, a plastic box comprises an outer shell 1 and an inner core 2, wherein the outer shell 1 is obtained by injection molding of the heat aging resistant PP material prepared in example 2, and the inner core 2 is a PET material.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The heat-aging-resistant PP material is characterized by comprising the following raw materials in parts by mass:
40-50 parts of PP
10-15 parts of PE
5-10 parts of ABS
5-9 parts of composite antioxidant
1-3 parts of compatilizer
3-7 parts of modified glass fiber
3-7 parts of calcium carbonate
1-3 parts of toner;
the composite antioxidant comprises hindered phenol antioxidant and phosphite antioxidant.
2. A heat aging resistant PP material according to claim 1, characterized in that: the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant is (1-2): 1.
3. a heat aging resistant PP material according to claim 2, characterized in that: the composite antioxidant also comprises a macromolecular thioether antioxidant.
4. A heat aging resistant PP material according to claim 3, characterized in that: the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant to the macromolecular thioether antioxidant is (3-6): 3: (1-2).
5. A heat aging resistant PP material according to claim 1, characterized in that: the modified glass fiber is prepared by modifying glass fiber by a wet method.
6. A heat aging resistant PP material according to claim 5, wherein: the wet modification comprises the following preparation steps: weighing glass fiber, deionized water, absolute ethyl alcohol and paraffin according to a certain proportion, stirring and heating under the condition of oil bath at 90-95 ℃ for 1.5-2h, then naturally cooling to room temperature and stopping stirring, and drying at 50-60 ℃ for 3-4d to obtain the modified glass fiber.
7. A heat aging resistant PP material according to claim 6, wherein: the content of the paraffin is 0.8wt% -1.2 wt%.
8. A heat aging resistant PP material according to claim 1, characterized in that: the compatilizer is PP-g-MAH.
9. The process for the preparation of a heat aging resistant PP material according to any of claims 1 to 8, comprising the steps of:
s1, weighing PP, PE, ABS, a composite antioxidant, a compatilizer, modified glass fiber, calcium carbonate and toner according to the proportion, and uniformly mixing the raw materials except the modified glass fiber to obtain a mixture;
and S2, feeding the mixture obtained in the step S1 into an extruder, feeding the modified glass fiber into the extruder from a fourth feeding port, and then carrying out melt extrusion to obtain the heat-aging-resistant PP material.
10. A plastic box characterized by: mainly made of a heat aging resistant PP material according to any of claims 1 to 8.
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| CN115594923A (en) * | 2022-10-17 | 2023-01-13 | 上海奉坤新材料有限公司（Cn） | Weather-resistant enhanced polypropylene material and preparation method and application thereof |
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Application publication date: 20210820 |