CN118185307B - Special material for manufacturing carrier roller frame of coal mine belt conveyor - Google Patents
Special material for manufacturing carrier roller frame of coal mine belt conveyor Download PDFInfo
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- CN118185307B CN118185307B CN202410616018.8A CN202410616018A CN118185307B CN 118185307 B CN118185307 B CN 118185307B CN 202410616018 A CN202410616018 A CN 202410616018A CN 118185307 B CN118185307 B CN 118185307B
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- 239000000463 material Substances 0.000 title claims abstract description 34
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229920002302 Nylon 6,6 Polymers 0.000 claims abstract description 43
- 235000015110 jellies Nutrition 0.000 claims abstract description 23
- 239000008274 jelly Substances 0.000 claims abstract description 23
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 48
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 45
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 45
- 239000007788 liquid Substances 0.000 claims description 39
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 28
- URXNVXOMQQCBHS-UHFFFAOYSA-N naphthalene;sodium Chemical compound [Na].C1=CC=CC2=CC=CC=C21 URXNVXOMQQCBHS-UHFFFAOYSA-N 0.000 claims description 23
- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 claims description 18
- 238000002360 preparation method Methods 0.000 claims description 16
- 239000004952 Polyamide Substances 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 15
- 229920002647 polyamide Polymers 0.000 claims description 15
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 claims description 14
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 14
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 14
- 238000003486 chemical etching Methods 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 230000004913 activation Effects 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000012190 activator Substances 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000000967 suction filtration Methods 0.000 claims description 7
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229920005575 poly(amic acid) Polymers 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
Abstract
The invention discloses a special material for manufacturing a roller frame of a coal mine belt conveyor, which comprises the following raw materials in percentage by mass: 60% -80% of activated PA66, 9% -10% of jelly C, 10% -30% of aluminum hydroxide powder, 0.1% -0.2% of diisopropyl peroxydicarbonate, and 100% of the total mass percent of the components. The invention can meet the requirements of working conditions of coal mine conveyors such as wear resistance, flame retardance, high impact resistance, self-lubricating function and the like, and widens the utilization field of PA66 reclaimed materials.
Description
Technical Field
The invention belongs to the technical field of carrier roller frame materials, and relates to a special material for manufacturing a carrier roller frame of a coal mine belt conveyor.
Background
Safety and efficiency of underground mining and transportation of coal mines are the most critical part of coal industry performance evaluation. The belt conveyor is not only a main production transport tool under the coal mine, but also a main energy consumption tool in the coal mine production process. At present, the coal mine belt conveyor is mainly made of steel materials, and a roller frame is thick and heavy and is not easy to install. In order to reduce the overall quality of the carrier roller support, reduce the installation difficulty of underground workers and improve the safety in the installation process, the selection of light plastic replacement parts or most of steel materials has great development prospect. The plastic has the advantages of low density, good chemical stability, high specific strength and the like, and has the remarkable advantages of rich raw materials, convenient manufacture, simple recovery, low cost and the like.
During the working period of the coal mine belt conveyor, the belt conveyor mainly works through the tail roller and the transmission roller, an endless annular belt can be formed, and the transportation speed in the whole process is controlled. Meanwhile, during the operation of the coal mine conveyor, the carrier roller mode can be utilized to control field transmission, and on the premise of expanding the tension of mechanical equipment, the operation safety and the operation efficiency of the belt conveyor are ensured. In order to ensure the continuity of coal transportation, the belt conveyor also works by friction force between the driving device and the roller and is transported in a horizontal tilting mode. Secondly, the use method of the coal mine belt conveyor ensures the telescopic operation under different working environments, improves the carrying and conveying capacity of equipment on the basis of prolonging the conveying distance, and ensures the conveying efficiency. This requires a high strength and dimensional stability of the carrier material, excellent wear resistance, good self-lubricating properties in use, and low transport resistance. Because of its use in coal mines and its large usage, it also requires good flame retardant properties and lower cost.
Disclosure of Invention
The invention aims to provide a special material for manufacturing a roller frame of a coal mine belt conveyor, which not only meets the working requirements of the coal mine conveyor, but also widens the utilization field of nylon 66 (PA 66) reclaimed materials.
The special material for manufacturing the roller frame of the coal mine belt conveyor comprises the following raw materials in percentage by mass: 60% -80% of activated PA66, 9.9% of jelly C, 10% -30% of aluminum hydroxide powder and 0.1% of diisopropyl peroxydicarbonate, wherein the sum of the mass percentages of the components is 100%.
The invention is also characterized in that:
jelly C is a polyamic acid containing PTFE.
The preparation of gum C is carried out according to the following steps:
Step 1: taking dry PTFE flaky powder, and dispersing the PTFE flaky powder in tetrahydrofuran at room temperature for 30min by ultrasonic, wherein the ultrasonic dispersion frequency is 20kHz, and the mass ratio of the PTFE flaky powder to the tetrahydrofuran is 1:5, obtaining gray liquid A, then taking sodium naphthalene complex chemical corrosive liquid, injecting the sodium naphthalene complex chemical corrosive liquid into the gray liquid A under the protection of N 2, stirring, adding deionized water, carrying out suction filtration, washing and airing to obtain PTFE powder B after gray activation;
Step 2: dissolving 4,4 '-diaminodiphenyl ether in pyrrolidone, adding pyromellitic dianhydride, then adding powder B and N 2, and continuously reacting to obtain a brown yellow jelly C which is polyamide acid containing PTFE, wherein the mass ratio of the pyromellitic dianhydride to the 4,4' -diaminodiphenyl ether to the pyrrolidone to the powder B is 2.63:2.37:33.6:1.
In the step 1, the sodium naphthalene complex chemical etching solution accounts for 5-10% of the sum of the mass of the sodium naphthalene complex chemical etching solution and the gray liquid A.
In the step 1, acetone is adopted for washing, and the total washing is 3 times.
The condition of adding the pyromellitic dianhydride in the step 2 is that the pyromellitic dianhydride is uniformly added for a plurality of times at the temperature of 0-10 ℃ for 1-2 hours.
The temperature condition of the continuous reaction in the step 2 is 0-4 ℃ and the reaction time is 8-10h.
The mass content of the powder B in the jelly C is 10-20%.
The preparation of the activated PA66 comprises the steps of uniformly spraying the regenerated PA66 with an activating agent, and then drying to obtain the activated PA66.
The activator is formic acid-carbolic acid mixture.
The beneficial effects of the invention are as follows:
The special material for manufacturing the carrier roller frame of the coal mine belt conveyor can meet the requirements of the working condition of the coal mine conveyor such as wear resistance, flame retardance, high impact resistance, self-lubricating function and the like, and widens the utilization field of PA66 reclaimed materials; because the consumption of the carrier roller frame of the coal mine conveyor is large, the PA66 reclaimed material can be used in a large amount, the resource waste and the environmental pollution are reduced, the material cost is reduced, and huge economic benefits can be created for enterprises and society.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
Example 1
The embodiment provides a special material for manufacturing a roller frame of a coal mine belt conveyor, which comprises the following raw materials in percentage by mass: activated PA66 80%, polyamide acid containing PTFE 9.9%, aluminum hydroxide powder 10%, diisopropyl peroxydicarbonate 0.1%.
The preparation of the polyamide acid containing PTFE is carried out according to the following steps:
Step 1: taking dry PTFE flaky powder, wherein the flaky PTFE has lubricating effect, is easier to disperse in an organic solvent or an organic oligomer after activation, and is ultrasonically dispersed in tetrahydrofuran for 30min at room temperature, the ultrasonic dispersion frequency is 20kHz, and the mass ratio of the PTFE flaky powder to the tetrahydrofuran is 1:5, obtaining gray liquid A, injecting sodium naphthalene complex chemical corrosive liquid into the gray liquid A under the protection of N 2, stirring, adding deionized water, carrying out suction filtration, washing for 3 times by adopting acetone, and airing to obtain PTFE powder B after gray activation, wherein the sodium naphthalene complex chemical corrosive liquid accounts for 5% of the sum of the mass of the sodium naphthalene complex chemical corrosive liquid and the gray liquid A;
Step 2: dissolving 4,4 '-diaminodiphenyl ether in pyrrolidone, uniformly adding pyromellitic dianhydride for a plurality of times at the temperature of 0 ℃, adding powder B after 2 hours, and continuously reacting for 8 hours at the temperature of 0 ℃ under the condition of N 2 to obtain a brown yellow jelly C which is polyamide acid containing PTFE, wherein the mass content of the powder B in the jelly C is 10%, and the mass ratio of the pyromellitic dianhydride, the 4,4' -diaminodiphenyl ether, the pyrrolidone and the powder B is 2.63:2.37:33.6:1.
The preparation of the activated PA66 comprises uniformly spraying the regenerated PA66 with an activator formic acid-carbolic acid mixture, and drying at 80 ℃ to obtain the activated PA66.
Example 2
The embodiment provides a special material for manufacturing a roller frame of a coal mine belt conveyor, which comprises the following raw materials in percentage by mass: 75% of activated PA66, 9.9% of polyamide acid containing PTFE, 15% of aluminum hydroxide powder and 0.1% of diisopropyl peroxydicarbonate.
The preparation of the polyamide acid containing PTFE is carried out according to the following steps:
Step 1: taking dry PTFE flaky powder, and dispersing the PTFE flaky powder in tetrahydrofuran at room temperature for 30min by ultrasonic, wherein the ultrasonic dispersion frequency is 20kHz, and the mass ratio of the PTFE flaky powder to the tetrahydrofuran is 1:5, obtaining gray liquid A, injecting sodium naphthalene complex chemical corrosive liquid into the gray liquid A under the protection of N 2, wherein the sodium naphthalene complex chemical corrosive liquid accounts for 10% of the sum of the mass of the sodium naphthalene complex chemical corrosive liquid and the gray liquid A, stirring, adding deionized water, carrying out suction filtration, washing for 3 times by adopting acetone, and then airing to obtain PTFE powder B after gray activation;
Step 2: dissolving 4,4 '-diaminodiphenyl ether in pyrrolidone, uniformly adding pyromellitic dianhydride for a plurality of times at the temperature of 3 ℃, adding powder B after 1 hour, and continuously reacting for 10 hours at the temperature of 4 ℃ under the condition of N 2 to obtain a brown yellow jelly C which is polyamide acid containing PTFE, wherein the mass content of the powder B in the jelly C is 20%, and the mass ratio of the pyromellitic dianhydride, the 4,4' -diaminodiphenyl ether, the pyrrolidone and the powder B is 2.63:2.37:33.6:1.
The preparation of the activated PA66 comprises uniformly spraying the regenerated PA66 with an activator formic acid-carbolic acid mixture, and drying at 80 ℃ to obtain the activated PA66.
Example 3
The embodiment provides a special material for manufacturing a roller frame of a coal mine belt conveyor, which comprises the following raw materials in percentage by mass: 70% of activated PA66, 9.9% of polyamide acid containing PTFE, 20% of aluminum hydroxide powder and 0.1% of diisopropyl peroxydicarbonate.
The preparation of the polyamide acid containing PTFE is carried out according to the following steps:
Step 1: taking dry PTFE flaky powder, and dispersing the PTFE flaky powder in tetrahydrofuran at room temperature for 30min by ultrasonic, wherein the ultrasonic dispersion frequency is 20kHz, and the mass ratio of the PTFE flaky powder to the tetrahydrofuran is 1:5, obtaining gray liquid A, injecting sodium naphthalene complex chemical corrosive liquid into the gray liquid A under the protection of N 2, stirring, adding deionized water, carrying out suction filtration, washing for 3 times by adopting acetone, and airing to obtain PTFE powder B after gray activation, wherein the sodium naphthalene complex chemical corrosive liquid accounts for 8% of the sum of the mass of the sodium naphthalene complex chemical corrosive liquid and the gray liquid A;
Step 2: dissolving 4,4 '-diaminodiphenyl ether in pyrrolidone, uniformly adding pyromellitic dianhydride for a plurality of times at the temperature of 5 ℃, adding powder B after 1 hour, and continuously reacting for 9 hours at the temperature of 2 ℃ under the condition of N 2 to obtain a brown yellow jelly C which is polyamide acid containing PTFE, wherein the mass content of the powder B in the jelly C is 15%, and the mass ratio of the pyromellitic dianhydride, the 4,4' -diaminodiphenyl ether, the pyrrolidone and the powder B is 2.63:2.37:33.6:1.
The preparation of the activated PA66 comprises uniformly spraying the regenerated PA66 with an activator formic acid-carbolic acid mixture, and drying at 80 ℃ to obtain the activated PA66.
Example 4
The embodiment provides a special material for manufacturing a roller frame of a coal mine belt conveyor, which comprises the following raw materials in percentage by mass: activated PA66 65%, jelly C9.9%, aluminum hydroxide powder 25%, diisopropyl peroxydicarbonate 0.1%.
In the same way as for the preparation of the polyamic acid containing PTFE of example 2, the preparation of gum C is carried out according to the following steps:
Step 1: taking dry PTFE flaky powder, and dispersing the PTFE flaky powder in tetrahydrofuran at room temperature for 30min by ultrasonic, wherein the ultrasonic dispersion frequency is 20kHz, and the mass ratio of the PTFE flaky powder to the tetrahydrofuran is 1:5, obtaining gray liquid A, then taking sodium naphthalene complex chemical etching liquid, injecting the sodium naphthalene complex chemical etching liquid into the gray liquid A under the protection of N 2, wherein the sodium naphthalene complex chemical etching liquid accounts for 10% of the sum of the mass of the sodium naphthalene complex chemical etching liquid and the gray liquid A, stirring, adding deionized water, carrying out suction filtration, washing for 3 times by adopting acetone, and then airing to obtain PTFE powder B after gray activation;
Step 2: dissolving 4,4 '-diaminodiphenyl ether in pyrrolidone, uniformly adding pyromellitic dianhydride for a plurality of times at the temperature of 3 ℃, adding powder B after 1 hour, and continuously reacting for 10 hours at the temperature of 4 ℃ under the condition of N 2 to obtain a brown yellow jelly C which is polyamide acid containing PTFE, wherein the mass content of the powder B in the jelly C is 20%, and the mass ratio of the pyromellitic dianhydride, the 4,4' -diaminodiphenyl ether, the pyrrolidone and the powder B is 2.63:2.37:33.6:1.
The preparation of the activated PA66 comprises uniformly spraying the regenerated PA66 with an activator formic acid-carbolic acid mixture, and drying at 80 ℃ to obtain the activated PA66.
Example 5
The embodiment provides a special material for manufacturing a roller frame of a coal mine belt conveyor, which comprises the following raw materials in percentage by mass: activated PA66 60%, jelly C9.9%, aluminum hydroxide powder 30%, diisopropyl peroxydicarbonate 0.1%.
The preparation of gum C was carried out as in example 1 for the preparation of the polyamic acid containing PTFE, according to the following steps:
Step 1: taking dry PTFE flaky powder, and dispersing the PTFE flaky powder in tetrahydrofuran at room temperature for 30min by ultrasonic, wherein the ultrasonic dispersion frequency is 20kHz, and the mass ratio of the PTFE flaky powder to the tetrahydrofuran is 1:5, obtaining gray liquid A, then taking sodium naphthalene complex chemical etching liquid, injecting the sodium naphthalene complex chemical etching liquid into the gray liquid A under the protection of N 2, stirring, adding deionized water, carrying out suction filtration, washing for 3 times by adopting acetone, and then airing to obtain PTFE powder B after gray activation;
Step 2: dissolving 4,4 '-diaminodiphenyl ether in pyrrolidone, uniformly adding pyromellitic dianhydride for a plurality of times at the temperature of 0 ℃, adding powder B after 2 hours, and continuously reacting for 8 hours at the temperature of 0 ℃ under the condition of N 2 to obtain a brown yellow jelly C which is polyamide acid containing PTFE, wherein the mass content of the powder B in the jelly C is 10%, and the mass ratio of the pyromellitic dianhydride, the 4,4' -diaminodiphenyl ether, the pyrrolidone and the powder B is 2.63:2.37:33.6:1.
The preparation of the activated PA66 comprises uniformly spraying the regenerated PA66 with an activator formic acid-carbolic acid mixture, and drying at 80 ℃ to obtain the activated PA66.
Nylon 66, namely PA66, is a common engineering plastic, has good mechanical properties, durability, corrosion resistance and heat resistance, is commonly used for manufacturing engineering parts such as gears, cams and bearings, is an indispensable basic material in the industries of transportation, mechanical manufacturing, national defense construction and the like, and the regenerated PA66 has the advantages of large market supply and low price, but the strength of the regenerated PA66 is low, polyamide acid (PAA) contains benzene rings, and the end groups are carboxyl groups and react with the end group amino groups of the PA66 to form chain segments with the benzene rings, so that the strength of the regenerated PA66 is improved. Diisopropyl peroxydicarbonate is a high-temperature initiator, and can improve the activity of PA66 in the extrusion process, so that the PAA reacts with the PA 66. Aluminum hydroxide is a flame retardant.
The special materials for manufacturing the roller frames of the belt conveyors of the coal mines in examples 1-5 are prepared into sample pieces for performance test, and the mass ratio data of the raw materials of the special materials in examples 1-5 are shown in table 1.
Table 1 test material formulation
Uniformly mixing activated PA66, jelly C and aluminum hydroxide powder by using a mechanical mixer, adding diisopropyl peroxydicarbonate, adding into a double-screw extruder, and extruding and granulating to obtain a light brown granular material D; the material D was added to an injection molding machine, and injection molded into dumbbell-shaped, long-strip-shaped, round-shaped, etc., and then performance test was performed, wherein the material D of examples 1 to 5 was injection molded into dumbbell-shaped when the tensile strength test was performed, the material D of examples 1 to 5 was injection molded into long-strip-shaped when the impact strength test was performed and the material D of examples 1 to 5 was injection molded into round-shaped when the volumetric wear rate test was performed, unmodified nylon PA6 was used as a comparative example of examples 1 to 5, the injection molding shape of comparative example was the same as that of examples, and the performance test data were shown in Table 2.
Table 2 performance test data
As can be seen from Table 2, the special material for manufacturing the roller frame of the belt conveyor of the coal mine has the characteristics of low volume abrasion rate, good abrasion resistance, flame retardance and high impact resistance.
Claims (5)
1. The special material for manufacturing the carrier roller frame of the coal mine belt conveyor is characterized by comprising the following raw materials in percentage by mass: 60% -80% of activated PA66, 9.9% of jelly C, 10% -30% of aluminum hydroxide powder and 0.1% of diisopropyl peroxydicarbonate, wherein the sum of the mass percentages of the components is 100%;
the jelly C is polyamide acid containing PTFE, and the preparation of the jelly C is carried out according to the following steps:
Step 1: taking dry PTFE flaky powder, and dispersing the PTFE flaky powder in tetrahydrofuran at room temperature for 30min by ultrasonic, wherein the ultrasonic dispersion frequency is 20kHz, and the mass ratio of the PTFE flaky powder to the tetrahydrofuran is 1:5, obtaining gray liquid A, then taking sodium naphthalene complex chemical corrosive liquid, injecting the sodium naphthalene complex chemical corrosive liquid into the gray liquid A under the protection of N 2, stirring, adding deionized water, carrying out suction filtration, washing and airing to obtain PTFE powder B after gray activation;
step 2: dissolving 4,4 '-diaminodiphenyl ether in pyrrolidone, adding pyromellitic dianhydride, then adding powder B and N 2, and continuously reacting to obtain a brown yellow jelly C which is polyamide acid containing PTFE, wherein the mass ratio of the pyromellitic dianhydride to the 4,4' -diaminodiphenyl ether to the pyrrolidone to the powder B is 2.63:2.37:33.6:1, a step of;
The mass content of the powder B in the jelly C is 10-20%;
The preparation method of the activated PA66 comprises the steps of uniformly spraying an activating agent on the regenerated PA66, and then drying to obtain the activated PA66;
the activator is a formic acid-carbolic acid mixture.
2. The special material for manufacturing the roller frame of the belt conveyor of the coal mine, according to claim 1, wherein the sodium naphthalene complex chemical etching solution in the step 1 accounts for 5% -10% of the sum of the mass of the sodium naphthalene complex chemical etching solution and the gray liquid A.
3. The special material for manufacturing the roller frame of the belt conveyor of the coal mine, as claimed in claim 1, wherein the washing in the step 1 adopts acetone for 3 times.
4. The special material for manufacturing the roller frame of the coal mine belt conveyor according to claim 1, wherein the condition of adding the pyromellitic dianhydride in the step 2 is that the pyromellitic dianhydride is uniformly added for 1-2 hours at the temperature of 0-10 ℃.
5. The special material for manufacturing the roller frame of the coal mine belt conveyor according to claim 1, wherein the temperature condition for continuous reaction in the step 2 is 0-4 ℃ and the reaction time is 8-10h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410616018.8A CN118185307B (en) | 2024-05-17 | 2024-05-17 | Special material for manufacturing carrier roller frame of coal mine belt conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410616018.8A CN118185307B (en) | 2024-05-17 | 2024-05-17 | Special material for manufacturing carrier roller frame of coal mine belt conveyor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118185307A CN118185307A (en) | 2024-06-14 |
| CN118185307B true CN118185307B (en) | 2024-07-26 |
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| CN202410616018.8A Active CN118185307B (en) | 2024-05-17 | 2024-05-17 | Special material for manufacturing carrier roller frame of coal mine belt conveyor |
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| CN101423665A (en) * | 2008-12-03 | 2009-05-06 | 中南大学 | High performance polymer base composite material for support roller and preparation method |
| CN117304506A (en) * | 2023-11-30 | 2023-12-29 | 季华实验室 | Codeposition polyimide modified fluorine-based material, preparation method and self-lubricating material |
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| CN101760017A (en) * | 2009-11-27 | 2010-06-30 | 平顶山华邦工程塑料有限公司 | Anti-static flame-retardant plastic for roller of underground conveying belt of coal mine |
| CN106336512B (en) * | 2016-08-11 | 2019-02-01 | 株洲时代新材料科技股份有限公司 | A kind of preparation method of polyimide modified nylon dragon resin |
| KR102175716B1 (en) * | 2018-04-10 | 2020-11-06 | 주식회사 엘지화학 | The method of the aromatic polyamide resin |
| CN108752921A (en) * | 2018-05-31 | 2018-11-06 | 霸州市仟舜永合工贸有限公司 | A kind of high abrasion-resistance nylon support roller light-weight high-polymer material and preparation method thereof |
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|---|---|---|---|---|
| CN101423665A (en) * | 2008-12-03 | 2009-05-06 | 中南大学 | High performance polymer base composite material for support roller and preparation method |
| CN117304506A (en) * | 2023-11-30 | 2023-12-29 | 季华实验室 | Codeposition polyimide modified fluorine-based material, preparation method and self-lubricating material |
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| PAA用量对PA6/PAA共混物性能的影响;李杨等;塑料科技;20170930;第45卷(第09期);第46-49页 * |
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