CN113754940A - Wear-resistant and corrosion-resistant injection-molded composite material and manufacturing method of pump accessory - Google Patents
Wear-resistant and corrosion-resistant injection-molded composite material and manufacturing method of pump accessory Download PDFInfo
- Publication number
- CN113754940A CN113754940A CN202111113779.4A CN202111113779A CN113754940A CN 113754940 A CN113754940 A CN 113754940A CN 202111113779 A CN202111113779 A CN 202111113779A CN 113754940 A CN113754940 A CN 113754940A
- Authority
- CN
- China
- Prior art keywords
- mass
- parts
- composite material
- resistant
- molecular weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
-
- 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
- C08L2207/06—Properties of polyethylene
- C08L2207/068—Ultra high molecular weight polyethylene
Abstract
The manufacturing method of the wear-resistant and corrosion-resistant injection-molded composite material and the pump accessories comprises the steps of mixing 35-50 parts by mass of dried high-density polyethylene, 20-30 parts by mass of linear low-density polyethylene, 15-35 parts by mass of ultrahigh molecular weight polyethylene, 5-15 parts by mass of reinforcing fibers and 1.5-5 parts by mass of processing aids, carrying out melt extrusion and granulation, and carrying out plasticization and uniform mixing to prepare the injection-molded composite material, wherein the reinforcing fibers are mixed with other materials in a lateral feeding and adding mode; the injection molding grade composite material who obtains produces pump accessories through injection molding, and the injection molding temperature sets up to: the first zone is 180-200 ℃, the second zone is 230-270 ℃, and the injection pressure is as follows: 80-120 Pa, the flow rate is 70% -90% of the maximum flow rate of the injection molding machine, and the mold temperature is as follows: 60-80 ℃.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a wear-resistant and corrosion-resistant injection-moldable high polymer composite material; the invention also relates to a manufacturing method of the pump accessory.
Background
The material selection for the pump is considered as follows: strength, corrosion, wear resistance, production and machining properties, maintenance properties, cost, etc. Common pump materials include cast iron, cast steel, stainless steel, carbon structural steel, alloy steel, brass, and non-metallic materials. The non-metallic materials for the pump are mainly used for sealing, such as polytetrafluoroethylene, fluororubber, nitrile rubber and the like. The polytetrafluoroethylene has excellent corrosion resistance and high temperature resistance, is mainly used for sealing elements of chemical pumps, is suitable for almost all chemical media at 250 ℃, and has the defects of higher hardness and high assembly difficulty. In recent years, the development of composite materials for pumps is more and more emphasized, and CN 206320067U discloses a pump shaft for a magnetic pump made of composite materials, wherein a base material of the pump shaft is made of metal, a corrosion-resistant and wear-resistant non-metal material is coated on the surface of the pump shaft, and corrosion-resistant and wear-resistant silicon carbide, tungsten carbide and the like are selected according to different media, so that the pump shaft has sufficient strength and toughness and excellent corrosion resistance and wear resistance. CN 108070217a discloses a composite material for vacuum pump sliding vane, which is composed of glass cloth and multifunctional glycidyl epoxy resin, and has high hardness and excellent acid and alkali resistance. Some of the developed composite materials are far superior to metallic materials such as brass, carbon steel, etc. However, most materials have insufficient surface hardness and insufficient material strength, and particularly have low shear strength, and thus the wear resistance and sand resistance of the materials are still to be improved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a high polymer composite material which has the advantages of impact resistance, low temperature resistance, wear resistance, chemical corrosion resistance and injection molding processing, and is suitable for preparing pump accessories; the invention also aims to provide a manufacturing method of the pump accessory.
In order to solve the technical problems, on one hand, the invention provides a wear-resistant and corrosion-resistant injection molding composite material, which comprises 35-50 parts by mass of high-density polyethylene, 20-30 parts by mass of linear low-density polyethylene, 15-35 parts by mass of ultrahigh molecular weight polyethylene, 5-15 parts by mass of reinforcing fibers and 1.5-5 parts by mass of processing aids; the composite material is prepared by mixing, melting, extruding and granulating dried component materials, plasticizing and uniformly mixing, wherein the reinforced fibers are mixed with other materials in a lateral feeding and adding mode; the molecular weight of the ultra-high molecular weight polyethylene is 800-1200 ten thousand; the crystallinity of the high-density polyethylene is 70-85%, and the melt index is 15-20 g/10 min; the crystallinity of the linear low-density polyethylene is 55-70%, and the melt index is 30-50 g/10 min; the reinforced fiber comprises one or a mixture of any two of basalt fiber, potassium hexatitanate whisker and sepiolite fiber which are subjected to surface activation by a surface modifier, the surface modifier accounting for 0.5-1.5 wt% of the fiber is used in the surface activation process of the reinforced fiber, the bagging activation time is not less than 20h, and the surface modifier comprises one or a mixture of a silane coupling agent and a titanate coupling agent; the processing aid comprises at least one of a plasticizer, a nucleating agent, a lubricant, a heat conducting agent and an antioxidant.
As a preferred technical scheme, the wear-resistant and corrosion-resistant injection molding composite material provided by the invention has the advantages that 1-3 parts by mass of the plasticizer is maleic anhydride grafted polyethylene wax; the molecular weight of the maleic anhydride grafted polyethylene wax is 1000-1499.
As a preferred technical scheme, the nucleating agent of the wear-resistant corrosion-resistant injection molding composite material is 0.1-0.5 part by mass of Milliken HPN-20E nucleating agent.
According to the preferable technical scheme, the lubricant is 0.1-0.7 part by mass of oxidized polyethylene wax.
According to the preferable technical scheme, the heat-conducting agent is 0.2-0.5 part by mass of graphene oxide.
As a preferred technical scheme, the anti-wear and anti-corrosion injection molding composite material provided by the invention comprises 0.1-0.3 part by mass of one or a combination of more than two of an antioxidant 1010, an antioxidant 264 and an antioxidant 168.
In order to solve the above technical problem, in another aspect, the present invention provides a method for manufacturing a pump accessory, including the steps of:
mixing, melting, extruding and granulating 35-50 parts by mass of dried high-density polyethylene, 20-30 parts by mass of linear low-density polyethylene, 15-35 parts by mass of ultrahigh molecular weight polyethylene, 5-15 parts by mass of reinforcing fiber and 1.5-5 parts by mass of processing aid, and plasticizing and uniformly mixing to obtain an injection molding composite material, wherein the reinforcing fiber is mixed with other materials in a lateral feeding and adding mode;
the injection molding grade composite material who obtains produces pump accessories through injection molding, and the injection molding temperature sets up to: the first zone is 180-200 ℃, the second zone is 230-270 ℃, and the injection pressure is as follows: 80-120 Pa, the flow rate is 70% -90% of the maximum flow rate of the injection molding machine, and the mold temperature is as follows: 60-80 ℃;
the molecular weight of the ultra-high molecular weight polyethylene is 800-1200 ten thousand; the crystallinity of the high-density polyethylene is 70-85%, and the melt index is 15-20 g/10 min; the crystallinity of the linear low-density polyethylene is 55-70%, and the melt index is 30-50 g/10 min; the reinforced fiber comprises one or a mixture of any two of basalt fiber, potassium hexatitanate whisker and sepiolite fiber which are subjected to surface activation by a surface modifier, the surface modifier accounting for 0.5-1.5 wt% of the fiber is used in the surface activation process of the reinforced fiber, the bagging activation time is not less than 20h, and the surface modifier comprises one or a mixture of a silane coupling agent and a titanate coupling agent; the processing aid comprises at least one of a plasticizer, a nucleating agent, a lubricant, a heat conducting agent and an antioxidant.
As a preferred technical scheme, in the manufacturing method of the pump accessory provided by the invention, the mixing, melt extrusion and granulation processes are completed by adopting a double-screw extruder, the melt extrusion process is divided into eleven working temperature zones, and the temperature is set as follows: 160-180 ℃ in the first zone, 190-210 ℃ in the second zone, 220-240 ℃ in the third zone, 240-260 ℃ in the fourth-tenth zone, and the temperature in the first zone: 240-260 ℃; the rotating speed of a screw in the melt extrusion process is 350-450 rpm; wherein the reinforced fiber is mixed with other materials in a mode of feeding in a lateral direction and then adding, and is added in a fourth working temperature zone to a sixth working temperature zone.
According to the manufacturing method of the pump accessory, 1-3 parts by mass of the plasticizer is maleic anhydride grafted polyethylene wax with the molecular weight of 1000-1499; the nucleating agent is 0.1-0.5 part by mass of Milliken HPN-20E nucleating agent; the lubricant is 0.1-0.7 part by mass of oxidized polyethylene wax; the heat conducting agent is 0.2-0.5 part by mass of graphene oxide; the antioxidant is 0.1-0.3 part by mass of one or a combination of more than two of antioxidant 1010, antioxidant 264 and antioxidant 168.
The foregoing preferences may be implemented individually or in combination without conflict.
Ultra-high molecular weight polyethylene (UHMWPE), generally having a viscosity average molecular weight of greater than 100X 104The g/mol ethylene high polymer has the advantages of good impact resistance, low temperature resistance, wear resistance, chemical corrosion resistance and the like, but also has the characteristics of extremely high melt viscosity, very low heat transfer efficiency and the like. The melt of the ultra-high molecular weight polyethylene has high viscosity and poor thermal conductivity, the ultra-high molecular weight polyethylene is a material which is difficult to process, a plurality of continuous processing methods are not suitable, parts with complex shapes and structures are difficult to form, and the prior art can not adopt an injection molding method to manufacture mechanical parts. The addition of the reinforcing fiber can improve the mechanical property of the material, but reduces the injection molding property of the material, so that the material is more difficult to manufacture mechanical parts by adopting an injection molding method. The high-density polyethylene is acid-base resistant, organic solvent resistant, excellent in electrical insulation, capable of maintaining a certain toughness at low temperature, but poor in mechanical property, poor in air permeability, easy to deform, easy to age, brittle, easy to stress crack, low in surface hardness, and 80% -90% in crystallinity of common high-density polyethylene. Although the linear low density polyethylene can be injection molded, it has insufficient surface hardness and insufficient material strength, and particularly, has low shear strength, and thus, the abrasion resistance and sand resistance are required to be improved. None of these three materials is generally considered suitable as a material for producing a pump accessory. The invention adds high-density polyethylene and linear low-density polyethylene into ultra-high molecular weight polyethylene to ensure that the composite material can be extrudedThe composite material is convenient for injection molding, the content of the ultrahigh molecular weight polyethylene is improved by adjusting the content and the melt index of the high density polyethylene and the linear low density polyethylene, so that the properties such as wear resistance and the like of the material are improved, the mechanical property of the material is improved by adding the reinforced fiber, and the performance requirements of the composite material on the mechanical property, the wear resistance, the sand resistance and the corrosion resistance are met. The combination of the high density polyethylene, the linear low density polyethylene, the reinforcing fiber and the ultra-high molecular weight polyethylene can improve the comprehensive performance of the obtained composite material, and the superiority of the ultra-high molecular weight polyethylene can not be greatly reduced. The reinforced fiber is mixed with other materials in a mode of adding the reinforced fiber after lateral feeding, so that the reinforced fiber is prevented from being cut too much, and the mechanical property of the composite material is improved.
The maleic anhydride graft modified low molecular weight polyethylene wax is preferred, so that the compatibility of the composite material can be effectively improved, the fluidity of the composite material is improved, the molding processing temperature is reduced, and the processing performance of the material is improved.
The wear resistance of UHMWPE is several times to dozens of times of that of common PE, and the wear resistance of UHMWPE increases with the increase of molecular weight. When the guide bearing is used as a pump accessory, the guide bearing requires high wear resistance, sand resistance and corrosion resistance, and the service life of the pump mainly depends on the service life of the guide bearing under the condition that the material and the surface quality (surface hardness, roughness and the like) of a shaft (or a shaft sleeve mounted on the shaft) are constant. The wear-resistant corrosion-resistant injection-moldable composite material obtained by the invention has high wear resistance, corrosion resistance, higher surface hardness, lower linear expansion coefficient and proper elastic modulus, is superior to metal materials such as brass, carbon steel and the like, is mainly applied to the engineering fields requiring wear resistance, sand resistance and corrosion resistance, such as guide bearings, shaft sleeves and the like, and has outstanding application value.
Detailed Description
In order to better understand the present invention, the following examples further illustrate the invention, the examples are only used to explain the invention, should not be understood to constitute any limitation of the invention.
The preparation raw materials of the wear-resistant corrosion-resistant injection molding composite material comprise 35-50 parts by mass of dried high-density polyethylene, 20-30 parts by mass of linear low-density polyethylene, 15-35 parts by mass of ultrahigh molecular weight polyethylene, 5-15 parts by mass of reinforcing fibers and 1.5-5 parts by mass of processing aids, and the raw materials are mixed, melted, extruded and granulated, and subjected to plasticization and uniform mixing to prepare the injection molding composite material, wherein the reinforcing fibers are mixed with other materials in a lateral feeding and adding mode. The mixing, melt extrusion and granulation processes adopt a double-screw extruder to extrude and granulate, the melt extrusion process is divided into eleven working temperature zones, and the temperature is set as follows: 160-180 ℃ in the first zone, 190-210 ℃ in the second zone, 220-240 ℃ in the third zone, 240-260 ℃ in the fourth-tenth zone, and the temperature in the first zone: 240-260 ℃; the rotating speed of a screw in the melt extrusion process is 350-450 rpm; wherein the reinforced fiber is mixed with other materials in a mode of feeding in a lateral direction and then adding, and the reinforced fiber is added in a fourth working temperature zone to a sixth working temperature zone.
The injection molding grade composite material who obtains produces pump accessories through injection molding, and the injection molding temperature sets up to: the first zone is 180-200 ℃, the second zone is 230-270 ℃, and the injection pressure is as follows: 80-120 Pa, the flow rate is 70% -90% of the maximum flow rate of the injection molding machine, and the mold temperature is as follows: 60-80 ℃.
The molecular weight of the ultra-high molecular weight polyethylene is 800-1200 ten thousand; the crystallinity of the high-density polyethylene is 70-85%, and the melt index is 15-20 g/10 min; the crystallinity of the linear low-density polyethylene is 55-70%, and the melt index is 30-50 g/10 min; the reinforced fiber comprises one or a mixture of any two of basalt fiber, potassium hexatitanate whisker and sepiolite fiber which are subjected to surface activation by a surface modifier, the surface modifier accounting for 0.5-1.5 wt% of the fiber is used in the surface activation process of the reinforced fiber, the bagging activation time is not less than 20h, and the surface modifier comprises one or a mixture of a silane coupling agent and a titanate coupling agent; the processing aid comprises at least one of a plasticizer, a nucleating agent, a lubricant, a heat conducting agent and an antioxidant.
In the invention, the plasticizer is preferably 1-3 parts by mass of maleic anhydride grafted polyethylene wax with the molecular weight of 1000-1499. The molecular weight of the polyethylene wax is 1500-5000, and the modified low molecular weight maleic anhydride grafted polyethylene wax is preferable, so that the compatibility of the material can be improved, the molding processing temperature can be reduced, and the processing performance of the material can be improved.
In the invention, the nucleating agent is preferably 0.1-0.5 part by mass of Milliken HPN-20E nucleating agent.
In the present invention, the lubricant is preferably 0.1 to 0.7 parts by mass of oxidized polyethylene wax.
In the present invention, the heat conductive agent is preferably 0.2 to 0.5 parts by mass of graphene oxide.
In the invention, the using amount of the antioxidant is 0.1-0.3 part by mass, and the antioxidant is preferably one or a combination of more than two of antioxidant 1010, antioxidant 264 and antioxidant 168.
Example 1:
in this example, the raw materials were:
43 parts by mass of high-density polyethylene, the crystallinity of which is 70 percent and the melt index of which is 17g/10 min; high density polyethylene was purchased from exxon mobil corporation.
25 parts by mass of linear low-density polyethylene, the crystallinity of which is 62 percent and the melt index of which is 40g/10 min; linear low density polyethylene was purchased from exxonmobil corporation.
25 parts of ultra-high molecular weight polyethylene, wherein the molecular weight is 800-1200 ten thousand; ultra high molecular weight polyethylene from tacona, usa was purchased.
10 parts by mass of reinforcing fibers; basalt fiber, Zhejiang Shijin basalt fiber, Inc. The surface activation process of the reinforced fiber uses 1.0wt% of the surface modifier of the fiber, the surface modifier uses KH-550 silane coupling agent, the surface activation and drying are carried out in a laboratory according to the prior conventional technology, and the reinforced fiber needs to be firstly subjected to surface activation by the surface modifier and bagged for 20 hours for later use.
2 parts by mass of maleic anhydride grafted polyethylene wax with the molecular weight of 1000-1499 is used as a plasticizer; 0.3 part by mass of Milliken HPN-20E nucleating agent is used as the nucleating agent; 0.4 part by mass of OPE618 oxidized polyethylene wax of Shanghai Synechol chemical raw materials Limited is used as the lubricant; the heat conducting agent is 0.35 part by mass of graphene oxide (obtained by self-making graphite by an oxidation-stripping method by a Hummers method); 0.2 part by mass of antioxidant 1010 was used as the antioxidant.
Firstly, after the reinforcing fiber is treated by the surface modifier, the envelope is activated for more than 20 hours for standby. All raw materials are dried according to the respective required temperature and time for later use.
Weighing high-density polyethylene and linear low-density polyethylene according to a certain proportion, mixing for 1-3 min in a horizontal high-speed mixer, adding a processing aid at 50-80 ℃, mixing for 2-3 min, adding ultrahigh molecular weight polyethylene, mixing for 2-3 min, and conveying to a double-screw extruder for melt extrusion and granulation, wherein the double-screw extruder is divided into eleven working temperature zones, and the temperature is set as: 160-180 ℃ in the first zone, 190-210 ℃ in the second zone, 220-240 ℃ in the third zone, 240-260 ℃ in the fourth-tenth zone, and the temperature in the first zone: 240-260 ℃; the rotating speed of a screw in the melt extrusion process is 350-450 rpm; the treated reinforced fiber is mixed with other materials in a lateral feeding mode, and the reinforced fiber is added in the fourth to sixth working temperature areas of the double-screw extruder. Drying the wear-resistant and corrosion-resistant injection-molded composite material obtained after granulation, and producing pump accessories by using an injection molding machine, wherein the injection molding temperature is set as follows in the embodiment: the first zone is 180-200 ℃, the second zone is 230-270 ℃, and the injection pressure is as follows: 80-120 Pa, the flow rate is 70% -90% of the maximum flow rate of the injection molding machine, and the mold temperature is as follows: 60-80 ℃.
Example 2:
in this example, the raw materials were:
50 parts by mass of high-density polyethylene, the crystallinity of which is 85 percent and the melt index of which is 20g/10 min; linear low density polyethylene was purchased from exxonmobil corporation.
30 parts by mass of linear low-density polyethylene, wherein the crystallinity is 70 percent, and the melt index is 50g/10 min; linear low density polyethylene was purchased from exxonmobil corporation.
15 parts by mass of ultra-high molecular weight polyethylene with the molecular weight of 800-1200 ten thousand; ultra high molecular weight polyethylene from tacona, usa was purchased.
5 parts by mass of reinforcing fibers; sepiolite fibers, manufactured by Hebei Hongli sepiolite Fuzz Co. The surface activation process of the reinforced fiber uses 1.5wt% of fiber surface modifier, the surface modifier uses KH-550 silane coupling agent and KR-12 titanate coupling agent of Kenrich company in the United states in a mass ratio of 1: 1, surface activation and drying according to the prior conventional technology in a laboratory, and the reinforced fiber is firstly subjected to surface activation by a surface modifier and packaged for 20 hours for standby.
1 part by mass of maleic anhydride grafted polyethylene wax with the molecular weight of 1000-1499 is used as a plasticizer; 0.5 part by mass of Milliken HPN-20E nucleating agent is used as the nucleating agent; 0.7 part by mass of OPE618 oxidized polyethylene wax of Shanghai Synechol chemical raw materials Limited is used as the lubricant; the heat conducting agent is 0.2 part by mass of graphene oxide (obtained by self-making graphite by an oxidation-stripping method by a Hummers method); 0.3 part by mass of antioxidant 168 was used as the antioxidant.
Firstly, after the reinforcing fiber is treated by the surface modifier, the envelope is activated for more than 20 hours for standby. All raw materials are dried according to the respective required temperature and time for later use.
Weighing high-density polyethylene and linear low-density polyethylene according to a certain proportion, mixing for 1-3 min in a horizontal high-speed mixer, adding a processing aid at 50-80 ℃, mixing for 2-3 min, adding ultrahigh molecular weight polyethylene, mixing for 2-3 min, and conveying to a double-screw extruder for melt extrusion and granulation, wherein the double-screw extruder is divided into eleven working temperature zones, and the temperature is set as: 160-180 ℃ in the first zone, 190-210 ℃ in the second zone, 220-240 ℃ in the third zone, 240-260 ℃ in the fourth-tenth zone, and the temperature in the first zone: 240-260 ℃; the rotating speed of a screw in the melt extrusion process is 350-450 rpm; the treated reinforced fiber is mixed with other materials in a lateral feeding mode, and the reinforced fiber is added in the fourth to sixth working temperature areas of the double-screw extruder. Drying the wear-resistant and corrosion-resistant injection-molded composite material obtained after granulation, and producing pump accessories by using an injection molding machine, wherein the injection molding temperature is set as follows in the embodiment: the first zone is 180-200 ℃, the second zone is 230-270 ℃, and the injection pressure is as follows: 80-120 Pa, the flow rate is 70% -90% of the maximum flow rate of the injection molding machine, and the mold temperature is as follows: 60-80 ℃.
Example 3:
in this example, the raw materials were:
35 parts by mass of high-density polyethylene, the crystallinity of which is 70 percent and the melt index of which is 15g/10 min; high density polyethylene was purchased from exxon mobil corporation.
20 parts by mass of linear low-density polyethylene, wherein the crystallinity is 55 percent, and the melt index is 30g/10 min; linear low density polyethylene was purchased from exxonmobil corporation.
35 parts of ultra-high molecular weight polyethylene with the molecular weight of 800-1200 ten thousand; ultra high molecular weight polyethylene from tacona, usa was purchased.
15 parts by mass of reinforcing fibers; potassium hexatitanate whisker, produced by Shanghai crystal whisker composite Co., Ltd. The surface activation process of the reinforced fiber uses 0.5wt% of surface modifier of the fiber, the surface modifier uses KR-12 titanate coupling agent of Kenrich company in America, the surface activation and drying are processed in a laboratory according to the prior conventional technology, and the reinforced fiber needs to be firstly subjected to surface activation and bagged for 20 hours by the surface modifier for standby.
The processing aid is characterized in that 3 parts by mass of maleic anhydride grafted polyethylene wax with the molecular weight of 1000-1499 is used as the plasticizer; 0.1 part by mass of Milliken HPN-20E nucleating agent is used as the nucleating agent; 0.1 part by mass of OPE618 oxidized polyethylene wax of Shanghai Synechol chemical raw materials Limited is used as the lubricant; the heat conducting agent is 0.5 part by mass of graphene oxide (obtained by self-making graphite by an oxidation-stripping method by a Hummers method); 0.1 part by mass of antioxidant 264 was used as the antioxidant.
Firstly, after the reinforcing fiber is treated by the surface modifier, the envelope is activated for more than 20 hours for standby. All raw materials are dried according to the respective required temperature and time for later use.
Weighing high-density polyethylene and linear low-density polyethylene according to a certain proportion, mixing for 1-3 min in a horizontal high-speed mixer, adding a processing aid at 50-80 ℃, mixing for 2-3 min, adding ultrahigh molecular weight polyethylene, mixing for 2-3 min, and conveying to a double-screw extruder for melt extrusion and granulation, wherein the double-screw extruder is divided into eleven working temperature zones, and the temperature is set as: 160-180 ℃ in the first zone, 190-210 ℃ in the second zone, 220-240 ℃ in the third zone, 240-260 ℃ in the fourth-tenth zone, and the temperature in the first zone: 240-260 ℃; the rotating speed of a screw in the melt extrusion process is 350-450 rpm; the treated reinforced fiber is mixed with other materials in a lateral feeding mode, and the reinforced fiber is added in the fourth to sixth working temperature areas of the double-screw extruder. Drying the wear-resistant and corrosion-resistant injection-molded composite material obtained after granulation, and producing pump accessories by using an injection molding machine, wherein the injection molding temperature is set as follows in the embodiment: the first zone is 180-200 ℃, the second zone is 230-270 ℃, and the injection pressure is as follows: 80-120 Pa, the flow rate is 70% -90% of the maximum flow rate of the injection molding machine, and the mold temperature is as follows: 60-80 ℃.
Comparative example 1
The raw materials in the embodiment 1 are adopted, and the main materials are weighed according to the following parts by mass: 30 parts of high-density polyethylene, 15 parts of linear low-density polyethylene, 40 parts of ultrahigh molecular weight polyethylene and 10 parts of reinforcing fiber. The other raw materials were used in the same amounts as in example 1.
Comparative example 2
The raw materials in the embodiment 1 are adopted, and the main materials are weighed according to the following parts by mass: 55 parts of high-density polyethylene, 35 parts of linear low-density polyethylene, 10 parts of ultrahigh molecular weight polyethylene and 15 parts of reinforcing fiber. The other raw materials were used in the same amounts as in example 1.
Comparative example 3
The raw materials in example 1 were used, and the main materials, 43 parts by mass of high density polyethylene, 25 parts by mass of linear low density polyethylene, and 25 parts by mass of ultra-high molecular weight polyethylene were weighed in the following parts by mass, and the amounts of the other raw materials were the same as in example 1 except that no reinforcing fiber was added to the main materials.
Comparative example 4
The raw materials in example 1 were used except that the raw materials did not include ultra-high molecular weight polyethylene, 55 parts by mass of medium-high density polyethylene and 35 parts by mass of linear low density polyethylene were used as the main materials, and the proportions of the other raw materials were the same as in example 1.
Comparative example 5
The raw materials in the embodiment 1 are adopted, and the difference is that the molecular weight of the ultra-high molecular weight polyethylene in the raw materials is 150-750 ten thousand; the heat distortion temperature (0.46MPa) is 85 ℃, the melting point is 130-136 ℃, and the proportion of other raw materials is the same as that of the example 1.
Comparative example 6
The raw materials in the embodiment 1 are adopted, the difference is that the high-density polyethylene in the raw materials is high-density polyethylene with the crystallinity of 80-90% and the melt index of 1.0-3.0 g/10min, and the proportion of other raw materials is the same as that in the embodiment 1.
Comparative example 7
The raw materials in the embodiment 1 are adopted, the difference is that the linear low density polyethylene in the raw materials is the linear low density polyethylene with the crystallinity of 50-55% and the melt index of 2.0-4.5 g/10min, and the proportion of other raw materials is the same as that in the embodiment 1.
Comparative example 8
The raw materials in the embodiment 1 are adopted, the difference is that the plasticizer in the raw materials is a polyethylene wax plasticizer with the molecular weight of 1500-5000, and the proportion of other raw materials is the same as that in the embodiment 1.
The wear-resistant and corrosion-resistant injection-molded composite materials obtained in the examples 1 to 3 and the comparative examples 1 to 7 are subjected to injection molding to prepare samples, and the performance is tested by the following specific test method:
the shear strength is tested according to the GB/T3354-2005 fiber reinforced plastic longitudinal and transverse shear test method;
the tensile strength and the elastic modulus are tested according to the determination of the tensile property of GB/T1040-2008 plastics;
the impact strength is tested according to the measurement of GB/T1043.1-2008 plastic simple support dyeing notch impact performance;
the friction coefficient is tested according to the GB 10006-1988 plastic film and sheet friction coefficient measuring method;
the abrasion loss is tested according to the MM type abrasion test method of GB/T12444.1-1990 metal abrasion test method;
the thermal conductivity was tested according to the method for measuring the heat transfer characteristics of ASTM D5470 thermally conductive electrically insulating materials;
and (3) wear resistance test: the abrasion resistance was tested according to ISO 15527.
And (3) testing sand resistance: the sand and water abrasion resistance of the material is carried out by adopting a horizontal abrasion tester (self-prepared sand and water test fixture), the sand content in water is respectively 10wt%, 15wt%, 20wt%, 25wt% and 30wt%, and the test time is as follows: 2 h; a load of 500N; rotating speed: 200 rpm. The evaluation was carried out under the above conditions in order to evaluate the magnitude of the mass loss. The mass loss is excellent at 1% or less, the mass loss is 2 to 5%, the mass loss is generally 6 to 10%, and the mass loss is poor at > 10%.
And (3) corrosion resistance test: placing various material samples in glacial acetic acid, ethanol, solvent oil, 60% strong base, 20% saline solution, 30% sulfuric acid and aqua regia respectively for more than 8h, and observing the surface change condition of the samples.
TABLE 1 results of Performance test of products obtained in examples 1 to 3
TABLE 2 Performance test results for products obtained in comparative examples 1 to 8
The detection result shows that:
the composite material can be extruded and is convenient for injection molding by adding the high-density polyethylene and the linear low-density polyethylene, the content of the ultra-high molecular weight polyethylene is improved by adjusting the content and the melt index of the high-density polyethylene and the linear low-density polyethylene, so that the performances of the material, such as wear resistance and the like, are improved, the performance requirements of the composite material on wear resistance, sand resistance (the performance of resisting river sand which is less than or equal to 25 percent) and corrosion resistance (the composite material can be suitable for corrosive environments except concentrated sulfuric acid and concentrated nitric acid) are met, the flowability, the injection molding performance and the mechanical property of the obtained composite material can be improved by combining the high-density polyethylene, the linear low-density polyethylene, the reinforcing fiber and the ultra-high molecular weight polyethylene, and the excellence of the ultra-high molecular weight polyethylene cannot be greatly reduced. The wear-resistant and corrosion-resistant injection-molded composite material provided by the invention is suitable for manufacturing pump accessories. The ultra-high molecular weight polyethylene has great influence on the comprehensive performance of the material, when the proportion of the ultra-high molecular weight polyethylene is low, the wear resistance, the sand resistance and the corrosion resistance of the material are all reduced, but when the proportion of the ultra-high molecular weight polyethylene is too high, the material is not suitable for injection molding processing; the introduction of the reinforced fiber can improve the mechanical property of the composite material; the ultra-high molecular weight polyethylene with the molecular weight of 800-1200 ten thousand is selected to be beneficial to improving the wear resistance and sand resistance of the composite material; the high-density polyethylene and the linear low-density polyethylene with low crystallinity and high melting index are selected, and the low-molecular-weight maleic anhydride grafted polyethylene wax is selected, so that the fluidity and the injection molding performance of the obtained composite material are improved, the using amount of the ultra-high-molecular-weight polyethylene is enlarged, and the performance of the composite material is improved.
The wear-resistant and corrosion-resistant injection-moldable composite material obtained by the invention has high wear resistance, excellent corrosion resistance and proper elastic modulus, is superior to metal materials such as brass, carbon steel and the like, can be used for producing products by adopting an injection molding process, can be used for producing wear-resistant, sand-resistant and corrosion-resistant products such as guide bearings, shaft sleeves and the like, and has outstanding application value.
It is obvious that the present invention is not limited to the above preferred embodiments, and various changes and modifications can be made within the spirit of the present invention defined by the claims and the specification, so that the same technical problems can be solved and the intended technical effects can be obtained, and thus, they are not repeated. All solutions which can be directly or indirectly derived from the disclosure of the present invention by a person skilled in the art are within the spirit of the present invention as defined by the appended claims.
Claims (9)
1. The composite material is characterized by comprising 35-50 parts by mass of high-density polyethylene, 20-30 parts by mass of linear low-density polyethylene, 15-35 parts by mass of ultrahigh molecular weight polyethylene, 5-15 parts by mass of reinforcing fiber and 1.5-5 parts by mass of processing aid; mixing, melting, extruding and granulating the dried component materials, plasticizing and uniformly mixing to prepare the injection molding composite material, wherein the reinforced fibers are mixed with other materials in a lateral feeding and adding mode; the molecular weight of the ultra-high molecular weight polyethylene is 800-1200 ten thousand; the crystallinity of the high-density polyethylene is 70-85%, and the melt index is 15-20 g/10 min; the crystallinity of the linear low-density polyethylene is 55-70%, and the melt index is 30-50 g/10 min; the reinforced fiber comprises one or a mixture of any two of basalt fiber, potassium hexatitanate whisker and sepiolite fiber which are subjected to surface activation by a surface modifier, the surface modifier accounting for 0.5-1.5 wt% of the fiber is used in the surface activation process of the reinforced fiber, the bagging activation time is not less than 20h, and the surface modifier comprises one or a mixture of a silane coupling agent and a titanate coupling agent; the processing aid comprises at least one of a plasticizer, a nucleating agent, a lubricant, a heat conducting agent and an antioxidant.
2. The wear-resistant corrosion-resistant injection-moldable composite material of claim 1, wherein the plasticizer is 1 to 3 parts by mass of maleic anhydride grafted polyethylene wax; the molecular weight of the maleic anhydride grafted polyethylene wax is 1000-1499.
3. The wear-resistant corrosion-resistant injection-moldable composite material of claim 1, wherein the nucleating agent is 0.1-0.5 parts by mass of Milliken HPN-20E nucleating agent.
4. The wear-resistant corrosion-resistant injection-moldable composite material of claim 1, wherein the lubricant is 0.1 to 0.7 parts by mass of oxidized polyethylene wax.
5. The wear-resistant corrosion-resistant injection-moldable composite material of claim 1, wherein the thermal conductive agent is 0.2-0.5 parts by mass of graphene oxide.
6. The wear-resistant corrosion-resistant injection-moldable composite material of claim 1, wherein the antioxidant is one or a combination of more than two of 0.1-0.3 parts by mass of antioxidant 1010, antioxidant 264 and antioxidant 168.
7. A method of manufacturing a pump accessory, comprising the steps of:
mixing, melting, extruding and granulating 35-50 parts by mass of dried high-density polyethylene, 20-30 parts by mass of linear low-density polyethylene, 15-35 parts by mass of ultrahigh molecular weight polyethylene, 5-15 parts by mass of reinforcing fiber and 1.5-5 parts by mass of processing aid, and plasticizing and uniformly mixing to obtain an injection molding composite material, wherein the reinforcing fiber is mixed with other materials in a lateral feeding and adding mode;
the injection molding grade composite material who obtains produces pump accessories through injection molding, and the injection molding temperature sets up to: the first zone is 180-200 ℃, the second zone is 230-270 ℃, and the injection pressure is as follows: 80-120 Pa, the flow rate is 70% -90% of the maximum flow rate of the injection molding machine, and the mold temperature is as follows: 60-80 ℃;
the molecular weight of the ultra-high molecular weight polyethylene is 800-1200 ten thousand; the crystallinity of the high-density polyethylene is 70-85%, and the melt index is 15-20 g/10 min; the crystallinity of the linear low-density polyethylene is 55-70%, and the melt index is 30-50 g/10 min; the reinforced fiber comprises one or a mixture of any two of basalt fiber, potassium hexatitanate whisker and sepiolite fiber which are subjected to surface activation by a surface modifier, the surface modifier accounting for 0.5-1.5 wt% of the fiber is used in the surface activation process of the reinforced fiber, the bagging activation time is not less than 20h, and the surface modifier comprises one or a mixture of a silane coupling agent and a titanate coupling agent; the processing aid comprises at least one of a plasticizer, a nucleating agent, a lubricant, a heat conducting agent and an antioxidant.
8. The method for manufacturing an accessory for a pump according to claim 7, wherein the mixing, melt-extruding and granulating processes are performed by using a twin-screw extruder, the melt-extruding process is divided into eleven working temperature zones, and the temperature is set as follows: 160-180 ℃ in the first zone, 190-210 ℃ in the second zone, 220-240 ℃ in the third zone, 240-260 ℃ in the fourth-tenth zone, and the temperature in the first zone: 240-260 ℃; the rotating speed of a screw in the melt extrusion process is 350-450 rpm; wherein the reinforced fiber is mixed with other materials in a mode of feeding in a lateral direction and then adding, and is added in a fourth working temperature zone to a sixth working temperature zone.
9. The method for manufacturing a pump accessory according to claim 7, wherein the plasticizer is 1 to 3 parts by mass of a maleic anhydride-grafted polyethylene wax having a molecular weight of 1000 to 1499; the nucleating agent is 0.1-0.5 part by mass of Milliken HPN-20E nucleating agent; the lubricant is 0.1-0.7 part by mass of oxidized polyethylene wax; the heat conducting agent is 0.2-0.5 part by mass of graphene oxide; the antioxidant is 0.1-0.3 part by mass of one or a combination of more than two of antioxidant 1010, antioxidant 264 and antioxidant 168.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111113779.4A CN113754940A (en) | 2021-09-23 | 2021-09-23 | Wear-resistant and corrosion-resistant injection-molded composite material and manufacturing method of pump accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111113779.4A CN113754940A (en) | 2021-09-23 | 2021-09-23 | Wear-resistant and corrosion-resistant injection-molded composite material and manufacturing method of pump accessory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113754940A true CN113754940A (en) | 2021-12-07 |
Family
ID=78796964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111113779.4A Pending CN113754940A (en) | 2021-09-23 | 2021-09-23 | Wear-resistant and corrosion-resistant injection-molded composite material and manufacturing method of pump accessory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113754940A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116515196A (en) * | 2023-06-05 | 2023-08-01 | 东莞市安高瑞新材料科技有限公司 | Halogen-free low-smoke flame-retardant crosslinked polyethylene material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104558770A (en) * | 2014-12-19 | 2015-04-29 | 广东特固力士工业皮带有限公司 | Ultrahigh-molecular weight polyethylene composite material and preparation method thereof |
| CN112980076A (en) * | 2021-02-18 | 2021-06-18 | 南通第六元素材料科技有限公司 | Graphene wear-resistant PE composite material for carrier roller and preparation method thereof |
-
2021
- 2021-09-23 CN CN202111113779.4A patent/CN113754940A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104558770A (en) * | 2014-12-19 | 2015-04-29 | 广东特固力士工业皮带有限公司 | Ultrahigh-molecular weight polyethylene composite material and preparation method thereof |
| CN112980076A (en) * | 2021-02-18 | 2021-06-18 | 南通第六元素材料科技有限公司 | Graphene wear-resistant PE composite material for carrier roller and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 周祥兴: "《中国塑料制品配方大全》", 31 May 1999, 中国物资出版社 * |
| 李建军: "《塑料配方设计》", 30 September 2019, 中国轻工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116515196A (en) * | 2023-06-05 | 2023-08-01 | 东莞市安高瑞新材料科技有限公司 | Halogen-free low-smoke flame-retardant crosslinked polyethylene material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111040440B (en) | Low-density high-wear-resistance nylon composite material and preparation method and application thereof | |
| CN109486015B (en) | Fiber-reinforced polypropylene material and preparation method thereof | |
| CN103087468A (en) | Polyether-ether-ketone composite material with high heat resistance and high wear resistance and preparation process thereof | |
| CN109971170B (en) | High-strength high-toughness wear-resistant PA66 alloy material and preparation method thereof | |
| CN103275448A (en) | Preparation method of modified packing ion enhanced polytetrafluoroethylene composite | |
| CN108424648B (en) | Carbon fiber composite material for injection molding | |
| CN112358724B (en) | High-wear-resistance low-temperature-rise polyamide composition and preparation method and application thereof | |
| CN101654541B (en) | Toughening wear-resistance magnetic polyformaldehyde composite material | |
| CN106380846A (en) | Wear-resistant low-floating fiber glass fiber-reinforced polyphenylene sulfide composite material and preparation method thereof | |
| CN106566244A (en) | High-flowability and good-surface carbon fibre reinforced nylon 66 composite material and preparation method thereof | |
| CN103319824B (en) | Method for preparing modified and enhanced polytetrafluoroethylene composite material | |
| CN110540724A (en) | Method for improving wear resistance of polymer material by composite filling | |
| CN113754940A (en) | Wear-resistant and corrosion-resistant injection-molded composite material and manufacturing method of pump accessory | |
| CN112759846A (en) | Graphene modified polymer composite material for bearing seat and preparation method thereof | |
| CN110903640A (en) | High-fluidity high-impact-resistance nylon material and preparation method thereof | |
| CN105440642A (en) | Modified polycarbonate engineering plastic and preparation method of modified polycarbonate engineering plastic | |
| CN111117221A (en) | Low-water-absorption composite material and preparation method thereof | |
| CN113429781A (en) | Long glass fiber reinforced bio-based polyamide 56, alloy and preparation method thereof | |
| CN109266001B (en) | Composite material for plastic bearing and preparation method and application thereof | |
| CN112266613A (en) | Polyphenylene sulfide composite material, preparation method thereof and injection molding part | |
| CN105524412A (en) | Antistatic peek resin material and preparation method thereof | |
| CN109251532B (en) | Composite material for plastic impeller and preparation method and application thereof | |
| CN109354872B (en) | Composite material for electrical appliance element and preparation method and application thereof | |
| CN108794977B (en) | Ternary blending modified alloy material containing polyether-ether-ketone and preparation method and application thereof | |
| CN111410833A (en) | Preparation method of long glass fiber reinforced high-gloss PC/ABS alloy material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |