CN111995818A - Preparation method of filler for wave-transmitting material and filler prepared by preparation method - Google Patents
Preparation method of filler for wave-transmitting material and filler prepared by preparation method Download PDFInfo
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- CN111995818A CN111995818A CN202010880415.8A CN202010880415A CN111995818A CN 111995818 A CN111995818 A CN 111995818A CN 202010880415 A CN202010880415 A CN 202010880415A CN 111995818 A CN111995818 A CN 111995818A
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- 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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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- 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
- C08K2201/00—Specific properties of additives
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- 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
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Abstract
The application relates to the field of wave-transmitting materials, in particular to a preparation method of a filler for a wave-transmitting material and the prepared filler, wherein the preparation method of the filler for the wave-transmitting material comprises the following steps: crushing and grinding carbonate rock to obtain rock micro powder; step (2), melting polypropylene; adding low-density polyethylene, paraffin and ethylene glycol diacrylate to form intermediate mixed slurry; step (4), adding the rock micro powder obtained by grinding in the step (1) into the intermediate mixed slurry, uniformly stirring, and extruding and granulating to obtain the filler for the wave-transmitting material; wherein the raw materials comprise the following components in parts by weight: 55-65 parts of carbonate rock; 35-40 parts of polypropylene; 2-5 parts of low-density polyethylene; 1-2 parts of paraffin; 0.3-1 part of glycol diacrylate. This application has reduction in production cost's effect.
Description
Technical Field
The application relates to the field of wave-transmitting materials, in particular to a preparation method of a filler for a wave-transmitting material and the filler prepared by the preparation method.
Background
At present, with the continuous development of communication technology, 5G base stations/micro stations, mobile phones, antennas, loT terminals, etc. have been widely used in life. Since the above facilities are generally installed in the open air, it is usually necessary to add a wave-transparent plastic casing or a bracket sheet on the above facilities to better protect the facilities from the external environment.
The traditional wave-transmitting material is usually prepared by taking modified plastic as a base material and hollow glass beads as a filler so as to better reduce the dielectric constant of the wave-transmitting material.
In view of the above-mentioned related art, the inventors consider that there is a disadvantage of high cost in using hollow glass beads as a filler.
Disclosure of Invention
In order to reduce the cost of the filler for the wave-transmitting material, the application provides a preparation method of the filler for the wave-transmitting material and the filler prepared by the preparation method.
In a first aspect, the present application provides a method for preparing a filler for a wave-transparent material, which adopts the following technical scheme:
a preparation method of a filler for a wave-transmitting material comprises the following steps:
crushing and grinding the carbonate rock, and controlling the particle size of the powder of the carbonate rock to be 15000-50000 meshes to obtain rock micro powder for later use;
step (2), melting polypropylene to form pre-melting slurry;
step (3), adding low-density polyethylene, paraffin and ethylene glycol diacrylate into the pre-melted slurry, and uniformly stirring to form intermediate mixed slurry;
step (4), adding the rock micro powder obtained by grinding in the step (1) into the intermediate mixed slurry, uniformly stirring, and extruding and granulating to obtain the filler for the wave-transmitting material;
wherein the raw materials comprise the following components in parts by weight:
55-65 parts of carbonate rock;
35-40 parts of polypropylene;
2-5 parts of low-density polyethylene;
1-2 parts of paraffin;
0.3-1 part of glycol diacrylate.
By adopting the technical scheme, the carbonate rock and the polypropylene are used as main components of the filler for the wave-transmitting material, so that the cost of the filler for the wave-transmitting material is favorably reduced, particularly in the era of rapid development of 5G signals nowadays, the requirement on the wave-transmitting material is more and more great, the requirement on the filler for the wave-transmitting material is also more and more great, the economic value of the wave-transmitting material is favorably improved, and the development of the 5G signals is favorably accelerated.
The carbonate rock is used as the main component of the filler, so that the strength performance of the filler is favorably improved, and the wave-transmitting material made of the filler has better strength performance.
By controlling the grinding particle size of the carbonate rock, rock micro powder is favorably and uniformly dispersed in the intermediate mixed slurry, so that the strength performance of the filler is favorably and better improved, and the wave-transmitting material prepared from the filler has better strength performance.
The modified polypropylene is prepared by mutually cooperating the low-density polyethylene, the paraffin and the ethylene glycol diacrylate, so that the compatibility of the polypropylene and the carbonate rock is favorably improved, the rock micro powder is favorably and uniformly dispersed in the intermediate mixed slurry, the density of the prepared filler is more uniform, and the strength performance of the wave-transmitting material prepared by the filler is better.
Preferably, the carbonate rock in the step (1) comprises the following components in parts by mass:
20-23 parts of marble;
15-20 parts of dolomite;
20-22 parts of limestone.
By adopting the technical scheme, the marble, the dolomite and the limestone with specific proportions are cooperatively matched with each other, so that the strength performance of the filler is favorably improved, the strength performance of the prepared filler is better, and the strength performance of the wave-transmitting material prepared from the filler is better.
Preferably, the particle size of the rock micro powder in the step (1) is 15000-16000 meshes.
By adopting the technical scheme, the particle size of the rock micro powder is controlled, so that the rock micro powder is uniformly dispersed in the intermediate mixed slurry, the processing difficulty of the rock micro powder is reduced, the preparation condition of the rock micro powder is simpler, and the production cost of the filler is reduced to a certain extent.
Preferably, in the step (1), different kinds of rock micro powders are uniformly mixed to form a mixed micro powder.
Through adopting above-mentioned technical scheme, through earlier with the rock miropowder misce bene of different kinds, form mixed miropowder, add in to middle mixed slurry again, be favorable to the rock of different kinds to cooperate better mutually, simultaneously, still be favorable to the rock miropowder well homodisperse in middle mixed slurry for the density of the filler that the preparation gained is more even, intensity properties is better, thereby the intensity properties that makes the wave-transparent material that adopts the filler preparation to form is better.
Preferably, the melting temperature in the step (2) is 170-175 ℃.
By adopting the technical scheme, the melting temperature in the step (1) is controlled, so that the melting temperature is not easy to be too high while the polypropylene is completely melted better, better energy saving is facilitated, meanwhile, the production and preparation conditions of the filler are easier to reach, and the production cost of the filler is better reduced to a certain extent.
Preferably, 1-1.5 parts by weight of ethylene-vinyl acetate copolymer emulsion is also added in the step (3).
By adopting the technical scheme, the ethylene-vinyl acetate copolymer emulsion is added, so that the compatibility of the polypropylene and the rock micro powder is favorably improved, the rock micro powder is more easily and uniformly dispersed in the polypropylene, the density of the prepared filler is more uniform, and the strength performance of the wave-transmitting material prepared by adopting the filler is favorably and better improved.
Preferably, in the step (3), the temperature is reduced to below 90 ℃ before the ethylene-vinyl acetate copolymer emulsion is added.
By adopting the technical scheme, the ethylene-vinyl acetate copolymer emulsion can better play a role by controlling the adding temperature of the ethylene-vinyl acetate copolymer emulsion, so that the polypropylene and the rock micropowder have better compatibility, the rock micropowder can be better and uniformly dispersed in the polypropylene, the density of the prepared filler is more uniform, and the wave-transmitting material prepared from the filler has better strength performance.
Preferably, in the step (3), 0.3-0.8 part by mass of diisobutyl fumarate is also added.
By adopting the technical scheme, through adding the diisobutyl fumarate, the compatibility of the polypropylene and the rock micro powder is favorably improved, and the rock micro powder is favorably and uniformly dispersed in the polypropylene, so that the density of the prepared filler is more uniform, and the strength performance of the wave-transmitting material prepared by adopting the filler is favorably and better improved.
Preferably, 0.1-0.2 part by mass of p-phenylenediamine is also added in the step (3).
By adopting the technical scheme, through adding p-phenylenediamine and diisobutyl fumarate to cooperate with each other, the effect of diisobutyl fumarate is favorably promoted better, so that the rock micro powder is more easily and uniformly dispersed in polypropylene, the density of the prepared filler is more uniform, and the strength performance of the wave-transmitting material prepared by adopting the filler is favorably improved better.
In a second aspect, the present application provides a filler for a wave-transparent material, which adopts the following technical scheme:
the filler for the wave-transmitting material is prepared by the preparation method of the filler for the wave-transmitting material.
By adopting the technical scheme, the filler for the wave-transmitting material is prepared by adopting the preparation method, so that the production cost of the filler for the wave-transmitting material is favorably reduced, meanwhile, the compatibility of the filler and the wave-transmitting base material is favorably improved, the filler is favorably and uniformly dispersed on the wave-transmitting base material, and the strength performance of the wave-transmitting material prepared by adopting the filler is better.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by adopting carbonate rock and polypropylene as main components of the filling material for the wave-transmitting material, the cost of the filling material for the wave-transmitting material is favorably reduced, the economic value of the wave-transmitting material is favorably improved, and the development of 5G signals is favorably accelerated;
2. by adopting carbonate rock as the main component of the filler, the strength performance of the filler is favorably improved, so that the wave-transmitting material prepared from the filler has better strength performance;
3. because the base material of the wave-transmitting material is generally plastic, the modified polypropylene is adopted to wrap the rock micro powder to be used as the filler, which is favorable for better improving the compatibility of the filler and the wave-transmitting base material, so that the prepared wave-transmitting material has better strength performance;
4. by controlling the grinding particle size of the carbonate rock, rock micro powder is favorably and uniformly dispersed in the intermediate mixed slurry, the strength performance of the filler is favorably and better improved, and the wave-transmitting material prepared by the filler has better strength performance;
5. the modified polypropylene is prepared by mutually cooperating the low-density polyethylene, the paraffin and the ethylene glycol diacrylate, so that the compatibility of the polypropylene and the carbonate rock is favorably improved, the rock micropowder is favorably and uniformly dispersed in the intermediate mixed slurry, the density of the prepared filler is more uniform, and the strength performance of the wave-transmitting material prepared by the filler is better.
Drawings
FIG. 1 is a process flow diagram of a method for preparing a filling material for a wave-transparent material according to the present invention.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
In the following examples, the marble was a type 903 marble from a kyowa stone processing plant in ningyang county.
In the following examples, dolomite of type 580 from andex hesheng stone ltd was used.
In the following examples, limestone model 274, Liangping red building materials GmbH, is used.
In the following examples, 206-type marlite from li bealock building materials ltd, ney county was used as the marlite.
In the following examples, polypropylene was prepared from polypropylene available from Dehui plastics technologies, Inc. of Dongguan under the trade designation F200-16B.
In the following examples, the low density polyethylene was 523 low density polyethylene available from Huayun plastics materials Co., Ltd, Dongguan.
In the following examples, paraffin having a product number of 986562 from Jinan Kogyo commercial Co., Ltd was used.
In the following examples, ethylene glycol diacrylate was used as the ethylene glycol diacrylate of xy20036, manufactured by Shandong-West Asia chemical industry Co., Ltd.
In the following examples, an ethylene-vinyl acetate copolymer emulsion having a product number of 18888336436 from Shandong Xin chemical Co., Ltd was used.
In the following examples, diisobutyl fumarate available from Shandong-West Asia chemical industry Co., Ltd, as xy05757 was used.
In the following examples, p-phenylenediamine available under the trade designation 106-50-3 from Anhui Denmark Chemicals, Inc. is used as p-phenylenediamine.
The embodiment of the application discloses a preparation method of a filler for a wave-transmitting material.
Example 1
Referring to fig. 1, a method for preparing a filler for a wave-transparent material includes the following steps:
and (1) crushing the carbonate rock, and then adding the carbonate rock into an industrial ultrasonic ultra-micro pulverizer to pulverize into rock micro powder with the particle size of 15000 meshes for later use.
And (2) adding polypropylene into the reaction kettle, and raising the temperature to 165 ℃ to completely melt the polypropylene to form pre-melted slurry.
And (3) stirring the pre-melting slurry at the rotating speed of 350r/min, adding low-density polyethylene, paraffin and ethylene glycol diacrylate into the pre-melting slurry while stirring, and uniformly stirring to form intermediate mixed slurry.
And (4) adding the rock micro powder obtained by grinding in the step (1) into the intermediate mixed slurry, uniformly stirring, adding into a double-screw granulator, and extruding and granulating to obtain the filler for the wave-transmitting material.
In this example, the carbonate rock is marble rock.
Wherein, the components and the content of the raw materials added in each step are shown in table 1, and the unit of the content of each component in table 1 is kg.
Example 2
The difference from example 1 is that:
the carbonate rock in the step (1) is dolomite, and the rock micro powder is crushed into rock micro powder with the particle size of 50000 meshes.
The melting temperature in step (2) was 180 ℃.
Wherein, the components and the contents of the raw materials added in each step are shown in table 1.
Example 3
The difference from example 1 is that:
the carbonate rock in the step (1) is limestone, and the rock micro powder is crushed into 16000-mesh rock micro powder.
The melting temperature in step (2) was 170 ℃.
Wherein, the components and the contents of the raw materials added in each step are shown in table 1.
Example 4
The difference from example 1 is that:
in the step (1), the carbonate rock is limestone rock, and the rock micro powder is crushed into rock micro powder with the particle size of 15500 meshes.
The melting temperature in step (2) was 175 ℃.
Wherein, the components and the contents of the raw materials added in each step are shown in table 1.
TABLE 1
Examples 5 to 12
The difference from example 4 is that:
the composition and content of the carbonate rock in the step (1) are shown in table 2, and the content unit of each component in table 2 is kg.
And the different types of rock micro powder obtained by grinding in the step (1) are stored separately, and the different types of rock micro powder obtained by grinding are added in the step (4) in sequence respectively.
TABLE 2
| Marble rock | Dolomitic rock | Limestone | Marl rock | |
| Example 5 | 20 | 20 | 20 | 0 |
| Example 6 | 23 | 15 | 22 | 0 |
| Example 7 | 22 | 17 | 21 | 0 |
| Example 8 | 15 | 25 | 15 | 0 |
| Example 9 | 25 | 10 | 25 | 0 |
| Example 10 | 0 | 17 | 21 | 22 |
| Example 11 | 22 | 0 | 21 | 17 |
| Example 12 | 22 | 17 | 0 | 21 |
Example 13
The difference from example 7 is that: uniformly mixing the different types of rock micro powder obtained by grinding in the step (1) to form mixed micro powder, and adding the mixed micro powder in the step (4).
Examples 14 to 15
The difference from example 4 is that: and (3) adding ethylene-vinyl acetate copolymer emulsion.
Wherein, the components and the content of the raw materials added in each step are shown in table 3, and the unit of the content of each component in table 3 is kg.
TABLE 3
| Example 14 | Example 15 | |
| Limestone | 58 | 58 |
| Polypropylene | 39 | 39 |
| Low density polyethylene | 4 | 4 |
| Paraffin wax | 1.7 | 1.7 |
| Ethylene glycol diacrylate | 0.5 | 0.5 |
| Ethylene-vinyl acetate copolymer emulsion | 1 | 1.5 |
Example 16
The difference from example 15 is that: after adding the low-density polyethylene, the paraffin and the ethylene glycol diacrylate in the step (2), firstly reducing the temperature to 85 ℃, and then adding the ethylene-vinyl acetate copolymer emulsion.
Examples 17 to 22
The difference from example 4 is that:
in the step (3), diisobutyl fumarate or/and p-phenylenediamine are also added.
Wherein, the components and the contents of the raw materials added in each step are shown in table 4, and the unit of the content of each component in table 4 is kg.
TABLE 4
Examples 23 to 25
The difference from example 4 is that:
the carbonate rock in the step (1) consists of marble rock, dolomite and limestone; and the different types of rock micro powder obtained by grinding in the step (1) are uniformly mixed to form mixed micro powder, and then the mixed micro powder is added in the step (4).
The melting temperature in step (2) was 173 ℃.
Adding ethylene-vinyl acetate copolymer emulsion, diisobutyl fumarate and p-phenylenediamine into the step (3); and in the step (2), after adding the low-density polyethylene, the paraffin, the glycol diacrylate, the diisobutyl fumarate and the p-phenylenediamine, reducing the temperature to 88 ℃, and then adding the ethylene-vinyl acetate copolymer emulsion.
Wherein, the components and the contents of the raw materials added in each step are shown in table 5, and the unit of the content of each component in table 5 is kg.
TABLE 5
Comparative example 1
Hollow glass microspheres with the product number of C-100 of China Huaxing New Material Co., Ltd are adopted as the filler.
Comparative example 2
The difference from example 4 is that: and (2) taking the rock micro powder obtained by crushing and grinding in the step (1) as a filler.
Comparative example 3
The difference from example 4 is that: the particle size of the rock micro powder in the step (1) is 12000 meshes.
Comparative example 4
The difference from example 4 is that: in step (3), the low-density polyethylene is replaced by the same amount of paraffin wax.
Comparative example 5
The difference from example 4 is that: in the step (3), the same amount of glycol diacrylate is used for replacing the paraffin wax.
Comparative example 6
The difference from example 4 is that: in the step (3), the ethylene glycol diacrylate is replaced by the same amount of low-density polyethylene.
Experiment 1
The dispersion uniformity of the fine rock powder encapsulated in the filler for the wave-transmitting material prepared in the above examples and comparative examples was observed and recorded.
Experiment 2
Melting epoxy resin, adding the filler prepared in the above examples and comparative examples into the epoxy resin in a molten state, wherein the mass ratio of the epoxy resin to the filler is 1:1.5, uniformly stirring to form mixed slurry, adding the mixed slurry into a mold, and performing injection molding to obtain the wave-transparent material, detecting the dielectric constant of the prepared wave-transparent material according to GB/T5597-1999 test method for complex dielectric constant of solid dielectric microwave, detecting the tensile strength (MPa) of the prepared wave-transparent material according to GB1040-79 test method for plastic tensile test, and detecting the bending strength (MPa) of the prepared wave-transparent material according to GB 1042-79 test method for plastic bending test.
Wherein the epoxy resin is purchased from Wuxi Borui chemical technology Co., Ltd, and the model is 009.
The data from the above experiments are shown in Table 6.
TABLE 6
According to the comparison of the data of examples 4-12 in table 6, the carbonate rocks of examples 4-12 have different compositions and dosage ratios, while the tensile strength and the bending strength of example 7 are higher than those of examples 8-9 and examples 10-12 than those of example 4 to a certain extent, which indicates that the strength performance of the filler for the wave-transmitting material can be improved better by adopting the synergistic combination of marble, dolomite and limestone with specific ratios, so that the strength performance of the prepared wave-transmitting material is higher, and the strength performance of the prepared wave-transmitting material can be greatly influenced by the absence of any component or the change of the dosage ratio of any component.
According to the comparison of the data of the example 7 and the example 13 in the table 6, the different kinds of rock micro powders in the example 7 are respectively and sequentially added, and the different kinds of rock micro powders in the example 13 are mixed to form the mixed micro powder to be added, and the tensile strength and the bending strength of the example 13 are higher than those of the example 7 to a certain extent, which shows that the rock micro powders are uniformly mixed and added firstly, so that the rock micro powders are favorably and uniformly dispersed in the polypropylene, the density of the prepared filler for the wave-transparent material is more uniform, and the strength performance of the wave-transparent material prepared by the filler is favorably and better improved.
According to the comparison of the data of the example 4 and the data of the examples 14 to 15 in the table 6, the ethylene-vinyl acetate copolymer emulsion is added into the examples 14 to 15 more than the example 4, the dispersion uniformity of the rock micro powder of the examples 14 to 15 is higher than that of the example 4, and the strength performance of the examples 14 to 15 is also higher than that of the example 4 to a certain extent, which shows that the addition of the ethylene-vinyl acetate copolymer emulsion is beneficial to better improving the compatibility of the polypropylene and the rock micro powder, so that the rock micro powder is more easily and uniformly dispersed in the polypropylene, and the density of the prepared filler for the wave-transmitting material is more uniform, so that the strength performance of the wave-transmitting material prepared by using the filler is higher.
According to the comparison of the data of the example 14 and the example 16 in the table 6, the temperature of the example 16 is reduced before the ethylene-vinyl acetate copolymer emulsion is added, and the tensile strength and the bending strength of the example 16 are higher than those of the example 14 to a certain extent, which shows that the ethylene-vinyl acetate copolymer emulsion is added after the temperature is reduced, so that the ethylene-vinyl acetate copolymer emulsion can better play a role, the compatibility of the polypropylene and the rock micropowder is better, the rock micropowder can be better and uniformly dispersed in the polypropylene, the density of the filler for the wave-transmitting material is more uniform, and the strength performance of the wave-transmitting material prepared by the filler is better.
Comparing the data of example 4 and examples 17-22 in Table 6, examples 17-18 added diisobutyl fumarate more than example 4, examples 19-20 added p-phenylenediamine more than example 4, examples 21-22 added diisobutyl fumarate and p-phenylenediamine more than example 4, and examples 21-22 had tensile strength and flexural strength higher than examples 17-18 than examples 19-20 and example 4, and examples 19-20 had tensile strength and flexural strength similar to those of example 4, which shows that by adding diisobutyl fumarate alone, compatibility of polypropylene and rock micropowder is improved to some extent, rock micropowder is uniformly dispersed in polypropylene, and the density of the prepared filler is more uniform, therefore, the wave-transmitting material prepared by the filler has higher strength performance; the strength performance of the wave-transmitting material is hardly influenced by independently adding the p-phenylenediamine, which shows that only when the p-phenylenediamine and the diisobutyl fumarate are mutually cooperated and matched, the compatibility of the rock micro powder and the polypropylene can be better improved, the density of the prepared filler is more uniform, and the strength performance of the wave-transmitting material prepared by the filler is higher.
According to the comparison of the data of example 4 and examples 23-25 in table 6, the ethylene-vinyl acetate copolymer emulsion, diisobutyl fumarate and p-phenylenediamine are added in the examples 23-25, the ethylene-vinyl acetate copolymer emulsion is added after the temperature is reduced, the carbonate rock is formed by the mutual cooperation of marble, dolomite and limestone, the rock micropowder is uniformly mixed before the addition, and the strength performance of the examples 23-25 is much higher than that of the example 4, which shows that the compatibility of the rock micropowder and polypropylene can be improved better by adjusting the composition of the carbonate rock and the addition mode of each component, adding the ethylene-vinyl acetate copolymer emulsion, diisobutyl fumarate and p-phenylenediamine and controlling the temperature of the ethylene-vinyl acetate copolymer emulsion, the density of the prepared filler is more uniform, so that the strength performance of the wave-transmitting material prepared by the filler is higher.
According to the comparison of the data of the example 4 and the comparative example 1 in the table 6, the strength performance of the wave-transmitting material prepared by using the filler prepared by the invention is similar to that of the wave-transmitting material prepared by using the traditional hollow glass beads as the filler, and the preparation cost of the invention is lower, thereby being beneficial to better reducing the production cost of the filler for the wave-transmitting material and further being beneficial to better improving the economic value of the wave-transmitting material.
According to the comparison of the data of the example 4 and the comparative example 2 in the table 6, the particle size of the rock micro powder of the comparative example 2 is different from that of the example 4, and the dispersion uniformity and the strength performance of the rock micro powder of the example 4 are much higher than those of the comparative example 2, which shows that the rock micro powder is better and uniformly dispersed in the polypropylene by controlling the particle size of the rock micro powder, so that the density of the prepared filler is more uniform, and the strength performance of the wave-transparent material prepared by the filler is higher.
According to the comparison of the data of the example 4 and the comparative examples 3-6 in the table 6, the carbonate rock is not treated in the comparative example 3, the low-density polyethylene, the paraffin wax and the dipropylene glycol ester are respectively lacked in the comparative examples 4-6, and the dispersion uniformity and the strength property of the rock micro powder of the example 4 are much higher than those of the comparative examples 3-6, which shows that the compatibility of the polypropylene and the rock micro powder is better improved and the rock micro powder is better and uniformly dispersed in the polypropylene only by adopting the synergistic cooperation of the low-density polyethylene, the paraffin wax and the dipropylene glycol ester, so that the density of the prepared filler is more uniform, the wave-transparent material prepared by the filler has higher strength property, any component is lacked or any proportion is changed, and the dispersion uniformity of the rock micro powder is easily influenced, thereby easily influencing the strength of the wave-transmitting material prepared by the filler.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A preparation method of a filling material for a wave-transmitting material is characterized by comprising the following steps: the method comprises the following steps:
crushing and grinding the carbonate rock, and controlling the particle size of the powder of the carbonate rock to be 15000-50000 meshes to obtain rock micro powder for later use;
step (2), melting polypropylene to form pre-melting slurry;
step (3), adding low-density polyethylene, paraffin and ethylene glycol diacrylate into the pre-melted slurry, and uniformly stirring to form intermediate mixed slurry;
step (4), adding the rock micro powder obtained by grinding in the step (1) into the intermediate mixed slurry, uniformly stirring, and extruding and granulating to obtain the filler for the wave-transmitting material;
wherein the raw materials comprise the following components in parts by weight:
55-65 parts of carbonate rock;
35-40 parts of polypropylene;
2-5 parts of low-density polyethylene;
1-2 parts of paraffin;
0.3-1 part of glycol diacrylate.
2. The method for preparing the filler for the wave-transmitting material according to claim 1, wherein: the carbonate rock in the step (1) comprises the following components in parts by mass:
20-23 parts of marble;
15-20 parts of dolomite;
20-22 parts of limestone.
3. The method for preparing the filler for the wave-transmitting material according to claim 1, wherein: the particle size of the rock micro powder in the step (1) is 15000-16000 meshes.
4. The method for preparing the filler for the wave-transmitting material according to claim 2, characterized in that: in the step (1), different kinds of rock micro powder are uniformly mixed to form mixed micro powder.
5. The method for producing a filler for a wave-transmitting material according to any one of claims 1 to 4, characterized in that: the melting temperature in the step (2) is 170-175 ℃.
6. The method for producing a filler for a wave-transmitting material according to any one of claims 1 to 4, characterized in that: and 1-1.5 parts by weight of ethylene-vinyl acetate copolymer emulsion is also added in the step (3).
7. The method for preparing the filler for the wave-transmitting material according to claim 6, wherein: in the step (3), before the ethylene-vinyl acetate copolymer emulsion is added, the temperature is reduced to below 90 ℃.
8. The method for producing a filler for a wave-transmitting material according to any one of claims 1 to 4, characterized in that: in the step (3), 0.3-0.8 part by weight of diisobutyl fumarate is also added
The method for preparing the filler for the wave-transmitting material according to claim 8, wherein: 0.1-0.2 part of p-phenylenediamine is also added in the step (3).
9. A filler for a wave-transmitting material, characterized in that: the wave-transmitting material is prepared by the method for preparing the filler for the wave-transmitting material according to any one of claims 1 to 9.
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| CN111154188A (en) * | 2019-12-27 | 2020-05-15 | 会通新材料股份有限公司 | High-wave-transmittance polypropylene composite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111154188A (en) * | 2019-12-27 | 2020-05-15 | 会通新材料股份有限公司 | High-wave-transmittance polypropylene composite material and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 张旭之 等: "《丙烯衍生物工学》", 31 May 1995, 化学工业出版社 * |
| 杨桂生 等: "《工程塑料》", 31 December 2017, 中国铁道出版社 * |
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