CN104419202A - Abrasion-resistant polytetrafluoroethylene and aramid fiber reinforced-modified PA66 material and preparation method thereof - Google Patents
Abrasion-resistant polytetrafluoroethylene and aramid fiber reinforced-modified PA66 material and preparation method thereof Download PDFInfo
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
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- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2427/18—Homopolymers or copolymers of tetrafluoroethylene
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Abstract
The invention discloses an abrasion-resistant polytetrafluoroethylene and aramid fiber reinforced-modified PA66 material and a preparation method thereof. The polytetrafluoroethylene and aramid fiber reinforced-modified PA66 material comprises the following components in percentage by weight: 40-80% of PA66 resin, 3-5% of a compatibilizer, 5-9% of a toughening agent, 1-3% of a coupling agent, 5-15% of polytetrafluoroethylene resin, 5-25% of aramid chopped fiber and 1-3% of other plastics processing additives. PA66 resin is adopted as matrix resin, polytetrafluoroethylene resin and aramid chopped fibers are adopted as filling base materials, the additives having suitable types and proportions are adopted and processed under proper process conditions, the prepared abrasion-resistant polytetrafluoroethylene and aramid fiber reinforced-modified PA66 material has performance indicators, such as tensile strength, flexural strength, flexural modulus, impact strength and thermal stability, which are far superior to those of the traditional fiberglass reinforced-modified PA66 as well as excellent abrasion resistance and excellent chemical resistance and has road market and application prospects in such industries as automobile, aerospace, petrochemical engineering, electromechanics and electronic and electric appliances.
Description
Technical field
The present invention relates to polymeric material field, particularly relate to a kind of tetrafluoroethylene and the wear-resisting enhancing modified PA66 material of aramid fiber and preparation method thereof.
Background technology
Aramid fiber full name is " PPTA ", English is Aramidfiber, be a kind of novel high-tech synthon, there is superstrength, high-modulus and high temperature resistant, acid-fast alkali-proof, the premium properties such as lightweight, wear resistance is good, aramid fiber intensity is 5 ~ 6 times of steel wire, modulus is 2 ~ 3 times of steel wire or glass fibre, toughness is 2 times of steel wire, and weight is only about 1/5 of steel wire, at the temperature of 560 degree, do not decompose, do not melt.It has good insulativity and ageing resistance, has very long life cycle.
Aramid fiber is mainly divided into two kinds, contraposition aramid fiber (PPTA) and a position aramid fiber (PMIA).Aramid fiber is important defence and military material, except military application, is now widely used in all respects of the national economy such as space flight and aviation, electromechanics, building, automobile, sports goods as a kind of filamentary material of high technology content.
Tetrafluoroethylene, English abbreviation PTFE, Chinese another name " Teflon ", " Teflon ", being called as " King " is a kind of synthetic macromolecular material employing fluorine and replace all hydrogen atoms in polyethylene, and its skeleton symbol is-[-CF2-CF2-] n-.
This material has excellent chemical stability, erosion resistance, it is one of corrosion resistance nature best materials in the world today, except molten alkali metal metal, chlorine trifluoride, chlorine pentafluoride and liquid fluorine, other all pharmaceutical chemicalss of ability, boil in chloroazotic acid and also do not change, be widely used in the occasion of the antiacid alkali of various needs and organic solvent.There is stopping property, height lubricates not viscosity, electrical insulating property and good resistance of aging, heatproof excellence (can long term operation at the temperature of+250 DEG C to-180 DEG C).Tetrafluoroethylene itself does not have toxicity to people.
PA66 is also known as nylon66 fiber, and chemical name polyhexamethylene adipamide is a kind of hypocrystalline-crystalline material.PA66 have nylon material there is very high physical strength, softening temperature is high, heat-resisting, coefficient of friction is low, wear-resistant, self lubricity, shock absorption and sound-deadening properties, oil resistant, weak acid resistant, alkaline-resisting and common solvent, electrical insulating property is good, has self-extinguishing, nontoxic, odorless, the advantages such as good weatherability, compare PA6 material and also can keep stronger strength and stiffness at comparatively high temps.Shortcoming is easy water suction, affects dimensional stability and electrical property, generally needs fiber or mineral-filled enhancing to be improved.
Tetrafluoroethylene and the wear-resisting enhancing modified PA66 material of aramid fiber, combine three wear-resisting, resistance to chemical attack, high temperature resistant, fire-retardant, the advantage of excellent electric properties aspect is especially very outstanding in wear-resistant, at automotive industry, space industry, petroleum chemical industry, electromechanical industries, electronic enterprises etc., there is the wide market space and application prospect.
Summary of the invention
The invention provides a kind of tetrafluoroethylene and the wear-resisting enhancing modified PA66 material of aramid fiber and preparation method thereof, tetrafluoroethylene and aramid fiber are carried out wear-resisting enhancing modified to PA66 material, make modified Pa 66 material prepared very excellent in tensile strength, flexural strength, modulus in flexure, shock strength, the performance index such as wear-resistant, compare the PA66 of common glass modification, performance achieves qualitative leap, compare pure polytetrafluoroethylmodified modified PA66, not only increase mechanical property, possess more excellent abrasion resistance properties simultaneously.
Technical scheme of the present invention is:
A kind of tetrafluoroethylene and the wear-resisting enhancing modified PA66 material of aramid fiber, by weight percentage, composed of the following components:
The preparation method of tetrafluoroethylene described above and the wear-resisting enhancing modified PA66 material of aramid fiber, comprises the following steps:
Step one, take each component by weight percent described above, and drying treatment is carried out to each component taken;
Step 2, PA66 resin, compatilizer and the coupling agent after drying treatment be placed in high-speed mixer or stirrer is pre-mixed 3-5min, then add teflon resin powder, toughner, plastic processing additives continue mixing 10-20min;
Step 3, step 2 is carried out while, aramid short fiber is provided at pre-soaking process 3-5min in coupling agent;
Step 4, mixed material is added in the hopper of twin screw extruder and carry out frit reaction through cylindrical shell, mixing, add aramid short fiber at the side spout of forcing machine simultaneously, regulate suitable processing temperature, screw speed, the processing parameters such as rate of feeding and aramid fiber radical, after melt extruding, through tie rod, cross water, granulation supervisor, obtain described tetrafluoroethylene and the wear-resisting enhancing modified PA66 material of aramid fiber, the processing parameter of described twin screw extruder is: screw slenderness ratio 35, front-end temperature 270-300 DEG C, stage casing temperature 280 ~ 310 DEG C, back segment temperature 270-290 DEG C, head temperature 290 DEG C, screw speed 500r/min.
It is matrix resin that the present invention chooses PA66 resin, teflon resin and aramid fiber are filler, adopt the auxiliary agent of suitable species and proportioning, process under appropriate processing condition, make prepare tetrafluoroethylene and aramid fiber wear-resisting enhancing modified PA66 material all very excellent in tensile strength, flexural strength, modulus in flexure, shock strength, wearability etc., can extensively use automotive industry, space industry, petroleum chemical industry, electromechanical industries, electronic enterprises.
Accompanying drawing explanation
Fig. 1 is the process schematic of tetrafluoroethylene and the wear-resisting enhancing modified PA66 of aramid fiber.
Embodiment
Below in conjunction with accompanying drawing, one detailed elaboration is done to specific embodiment of the present invention.
Step one, take a kind of resin 91%, maleic anhydride 3%, vinylbenzene 3%, dicumyl peroxide 0.1%, oxidation inhibitor 0.4%, lubricant 0.5%, white mineral oil 2% in the thermoplastic elastomer resins such as POE, EPDM, SBS, SEBS, TPU by weight percentage;
Step 2, the dicumyl peroxide taken to be dissolved in the white mineral oil that takes, to stir, fully dissolve and obtain mixed solution;
Step 3, the mixed solution in step 2 and the POE resin taken, maleic anhydride, vinylbenzene, oxidation inhibitor, lubricant joined in high-speed mixer to mix obtain mixture;
Step 4, put in the hopper of twin screw extruder by the mixture of step 3, through frit reaction, extruding pelletization, obtains compatilizer; Twin screw extruder processing condition are: melt zone temperature 150-155 DEG C, conversion zone temperature 170-185 DEG C, degassing stages 180-185 DEG C, head temperature 150-155 DEG C.
Embodiment 1
A kind of tetrafluoroethylene of this embodiment and the wear-resisting enhancing modified PA66 material of aramid fiber, by weight percentage, composed of the following components:
PA66 resin 74%; Aramid fiber 10%; Compatilizer 3%; Toughner 5%; Coupling agent 1%; Tetrafluoroethylene 5%; Plastic processing additives 2%.
Its preparation method is as follows:
Step one, take each component by weight percent described above, and drying treatment is carried out to each component taken;
Rapid two, PA66 resin, compatilizer and the coupling agent after drying treatment be placed in high-speed mixer or stirrer is pre-mixed 3-5min, then add teflon resin powder, toughner, plastic processing additives continue mixing 10-20min;
Step 3, step 2 is carried out while, aramid short fiber is provided at pre-soaking process 3-5min in coupling agent;
Step 4, mixed material is added twin screw extruder hopper in carry out frit reaction through cylindrical shell, mixing, add aramid short fiber at the side spout of forcing machine simultaneously, regulate suitable processing temperature, screw speed, the processing parameters such as rate of feeding and aramid fiber radical, after melt extruding, through tie rod, cross water, granulation supervisor, obtains described tetrafluoroethylene and the wear-resisting enhancing modified PA66 material of aramid fiber.The processing parameter of described twin screw extruder is: screw slenderness ratio 35, front-end temperature 270-300 DEG C, stage casing temperature 280 ~ 310 DEG C, back segment temperature 270-290 DEG C, head temperature 290 DEG C; Screw speed 500r/min.
Embodiment 2
A kind of tetrafluoroethylene of this embodiment and the wear-resisting enhancing modified PA66 material of aramid fiber, by weight percentage, composed of the following components:
PA66 resin 60%; Aramid fiber 15%; Compatilizer 4%; Toughner 7%; Coupling agent 2%; Tetrafluoroethylene 10%; Plastic processing additives 2%.
Its preparation method is as follows:
Step one, take each component by weight percent described above, and drying treatment is carried out to each component taken;
Rapid two, PA66 resin, compatilizer and the coupling agent after drying treatment be placed in high-speed mixer or stirrer is pre-mixed 3-5min, then add teflon resin powder, toughner, plastic processing additives continue mixing 10-20min;
Step 3, step 2 is carried out while, aramid short fiber is provided at pre-soaking process 3-5min in coupling agent;
Step 4, mixed material is added twin screw extruder hopper in carry out frit reaction through cylindrical shell, mixing, add aramid short fiber at the side spout of forcing machine simultaneously, regulate suitable processing temperature, screw speed, the processing parameters such as rate of feeding and aramid fiber radical, after melt extruding, through tie rod, cross water, granulation supervisor, obtains described tetrafluoroethylene and the wear-resisting enhancing modified PA66 material of aramid fiber.The processing parameter of described twin screw extruder is: screw slenderness ratio 35, front-end temperature 270-300 DEG C, stage casing temperature 280 ~ 310 DEG C, back segment temperature 270-290 DEG C, head temperature 290 DEG C; Screw speed 500r/min.
Embodiment 3
A kind of tetrafluoroethylene of this embodiment and the wear-resisting enhancing modified PA66 material of aramid fiber, by weight percentage, composed of the following components:
PA66 resin 48%; Aramid fiber 20%; Compatilizer 5%; Toughner 8%; Coupling agent 2%; Tetrafluoroethylene 15%; Plastic processing additives 2%.
Its preparation method is as follows:
Step one, take each component by weight percent described above, and drying treatment is carried out to each component taken;
Rapid two, PA66 resin, compatilizer and the coupling agent after drying treatment be placed in high-speed mixer or stirrer is pre-mixed 3-5min, then add teflon resin powder, toughner, plastic processing additives continue mixing 10-20min;
Step 3, step 2 is carried out while, aramid short fiber is provided at pre-soaking process 3-5min in coupling agent;
Step 4, mixed material is added twin screw extruder hopper in carry out frit reaction through cylindrical shell, mixing, add aramid short fiber at the side spout of forcing machine simultaneously, regulate suitable processing temperature, screw speed, the processing parameters such as rate of feeding and aramid fiber radical, after melt extruding, through tie rod, cross water, granulation supervisor, obtains described tetrafluoroethylene and the wear-resisting enhancing modified PA66 material of aramid fiber.The processing parameter of described twin screw extruder is: screw slenderness ratio 35, front-end temperature 270-300 DEG C, stage casing temperature 280 ~ 310 DEG C, back segment temperature 270-290 DEG C, head temperature 290 DEG C; Screw speed 500r/min.
Performance test and evaluation:
Particle material prepared by above-described embodiment 1-3 is injection molded into various standard Mechanics Performance Testing batten by ASTM standard, and be injection molded into standard burning test specimen bar by U.S.'s UL standard, testing method is as shown in table 1:
Table 1
The performance test data of embodiment 1 is as shown in table 2 below:
Table 2
The performance test data of embodiment 2 is as shown in table 3 below:
Table 3
The performance test data of embodiment 3 is as shown in table 4 below:
Table 4
As can be seen from upper table 2,3,4, compared with aramid fiber prepared by embodiment 1-3 is material modified with the PA66 of glass fiber reinforcement of the same type with the standard batten being injection molded into ASTM of tetrafluoroethylene, in tensile strength, shock strength, heat-drawn wire, the coefficient of wear factor is wanted high, low on flexural strength, modulus in flexure and dynamic friction coefficient.Wear factor represents the capacity of water of material abrasion resisting, and numerical value is higher, and the wear resistance of material is stronger, and dynamic friction coefficient represents the size of material self-lubricating capacities, and resin is less, and self-lubricating capacities is stronger.As can be seen here, obtained tetrafluoroethylene and aramid fiber wear-resisting enhancing modified PA66 material not only possess good mechanical property and thermal property, are improved significantly in wear-resistant and self-lubricating.
The raising of tensile strength, is mainly provided by aramid fiber, and aramid fiber possesses the characteristic higher than glass fibre specific tenacity; The reduction of flexural strength and modulus, mainly because tetrafluoroethylene and aramid fiber self-lubricating capacities are strong, during longitudinal stress, molecular chain easily misplaces, and tensile energy declines; The raising of shock strength, mainly by aramid fiber, toughner and compatilizer acting in conjunction provide, aramid fiber true qualities have extraordinary snappiness, select suitable toughner and compatilizer, improve resin, the interface bond strength of filler and fiber, can absorb higher impact energy; The raising of heat-drawn wire, mainly have caused by teflon resin filling, tetrafluoroethylene heatproof is very high, indirectly improves the heat-drawn wire of material.The reduction of dynamic friction coefficient and the raising of wear factor, by aramid fiber, caused by the contribution of tetrafluoroethylene, aramid fiber has wear resistance more better than glass fibre, and tetrafluoroethylene is one of material that in solid material, frictional coefficient is minimum and wear factor is the highest.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included in claims of the present invention.
Claims (5)
1. tetrafluoroethylene and the wear-resisting enhancing modified PA66 material of aramid fiber, is characterized in that: by weight percentage, composed of the following components:
2. tetrafluoroethylene according to claim 1 and the wear-resisting enhancing modified PA66 material of aramid fiber, it is characterized in that: described compatilizer is homemade thermoplastic elastomer grafted maleic anhydride, described thermoplastic elastomer can be one of them of POE, EPDM, SBS, SEBS, TPU, and its preparation method is as follows:
Step one, take a kind of thermoplastic elastomer resin 91%, maleic anhydride 3%, vinylbenzene 3%, dicumyl peroxide 0.1%, oxidation inhibitor 0.4%, lubricant 0.5%, white mineral oil 2% by weight percentage;
Step 2, the dicumyl peroxide taken to be dissolved in the white mineral oil that takes, to stir, fully dissolve and obtain mixed solution;
Step 3, the mixed solution in step 2 and the POE resin taken, maleic anhydride, vinylbenzene, oxidation inhibitor, lubricant joined in high-speed mixer to mix obtain mixture;
Step 4, put in the hopper of twin screw extruder by the mixture of step 3, through frit reaction, extruding pelletization, obtains compatilizer; Twin screw extruder processing condition are: melt zone temperature 150-155 DEG C, conversion zone temperature 170-185 DEG C, degassing stages 180-185 DEG C, head temperature 150-155 DEG C.
3. tetrafluoroethylene according to claim 1 and the wear-resisting enhancing modified PA66 material of aramid fiber, is characterized in that: described plastic processing additives comprises oxidation inhibitor, thermo-stabilizer and lubricant.
4. tetrafluoroethylene according to claim 3 and the wear-resisting enhancing modified PA66 material of aramid fiber, is characterized in that: the oxidation inhibitor of described thermo-stabilizer by copper compound and the mixture of synergistic agent; Described oxidation inhibitor by phenolic antioxidant and phosphoric acid ester oxidation inhibitor by weight 1:1 proportioning form; Described lubricant is pentaerythritol stearate (PETS).
5. a preparation method for the tetrafluoroethylene as described in claim as arbitrary in Claims 1-4 and the wear-resisting enhancing modified PA66 material of aramid fiber, is characterized in that: comprise the following steps:
Step one, take each component by weight percent according to claim 1, and drying treatment is carried out to each component taken;
Step 2, PA66 resin, compatilizer and the coupling agent after drying treatment be placed in high-speed mixer or stirrer is pre-mixed 3-5min, then add teflon resin powder, toughner, plastic processing additives continue mixing 10-20min;
Step 3, step 2 is carried out while, aramid short fiber is provided at pre-soaking process 3-5min in coupling agent;
Step 4, mixed material is added in the hopper of twin screw extruder and carry out frit reaction through cylindrical shell, mixing, add aramid short fiber at the side spout of forcing machine simultaneously, regulate suitable processing temperature, screw speed, the processing parameters such as rate of feeding and aramid fiber radical, after melt extruding, through tie rod, cross water, granulation supervisor, obtain described tetrafluoroethylene and the wear-resisting enhancing modified PA66 material of aramid fiber, the processing parameter of described twin screw extruder is: screw slenderness ratio 35, front-end temperature 270-300 DEG C, stage casing temperature 280 ~ 310 DEG C, back segment temperature 270-290 DEG C, head temperature 290 DEG C, screw speed 500r/min.
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| CN114752192A (en) * | 2022-05-11 | 2022-07-15 | 深圳市汉森姆新材料有限公司 | Aramid fiber and glass fiber modified PET composite material and preparation method thereof |
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| CN106832914A (en) * | 2017-03-01 | 2017-06-13 | 北京天元奥特橡塑有限公司 | Thermoplastic polyurethane, the composite material and preparation method thereof of aramid fiber modification of nylon 66 |
| CN108192333A (en) * | 2017-12-28 | 2018-06-22 | 上海至正道化高分子材料股份有限公司 | A kind of fireproofing corrosion resistant erosion polyurethane cable jacket material and preparation method |
| CN111635630A (en) * | 2020-06-23 | 2020-09-08 | 宁海宏德新材料科技有限公司 | Wear-resistant material for steering knuckle, preparation method of wear-resistant material and wear-resistant lining |
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| CN118109046A (en) * | 2024-02-29 | 2024-05-31 | 滨州中科催化技术有限公司 | Preparation method of nylon 66 material |
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Application publication date: 20150318 |