CN105219016A - A kind of wear-resisting polyformaldehyde matrix material and preparation method thereof - Google Patents
A kind of wear-resisting polyformaldehyde matrix material and preparation method thereof Download PDFInfo
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- CN105219016A CN105219016A CN201510648328.9A CN201510648328A CN105219016A CN 105219016 A CN105219016 A CN 105219016A CN 201510648328 A CN201510648328 A CN 201510648328A CN 105219016 A CN105219016 A CN 105219016A
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Abstract
The invention belongs to field of polymer composite material, provide a kind of wear-resisting polyformaldehyde matrix material, the content of each component is: polyoxymethylene 48 ~ 98.5wt%, aramid fiber 1 ~ 40wt%, compatilizer 0.3 ~ 10wt%, dispersion agent 0.2 ~ 2wt%.Present invention also offers the preparation method of above-mentioned wear-resisting polyformaldehyde matrix material, after polyoxymethylene, aramid fiber, compatilizer and dispersant is even, then compound is added in twin screw extruder, melting shearing at a certain temperature, extruding pelletization.Polyformaldehyde composite material prepared by the present invention has excellent friction and wear behavior and self-lubricating effect, and preparation technology of the present invention is simple and convenient, and production unit is simple to operate.
Description
Technical field
The invention belongs to field of polymer composite material, specifically a kind of wear-resisting polyformaldehyde matrix material and preparation method thereof.
Background technology
Polyoxymethylene (POM) is containing oxidation methylene radical (-CH on a kind of main chain
2o-) chain link, molecular chain is alternately arranged by C-O and is reversed into spiral helicine linear macromolecule polymkeric substance, is the engineering plastics of title with " take by force just ", " supersteel ".POM and matrix material thereof have been widely used in fields such as machinery, automobile, electronic apparatuss manufacturing the various part with self-lubricating, antifriction performance.But pure polyoxymethylene frictional coefficient is bigger than normal, can only be used for low speed, low year, under low load condition, be difficult to meet the conducting power such as precision optical machinery, electronic apparatus component high speed, high pressure, high temperature, light-weighted requirement, limit the application in each field.Therefore need to carry out modification to POM, to improve the friction and wear behavior of POM.The method of normal employing has: add the macromolecular material that tetrafluoroethylene, polyolefine etc. have more low-friction coefficient; The lubricating oil such as oil addition or lubricating grease; Add the inorganic lubricant such as graphite, molybdenumdisulphide; Add the filamentary materials such as glass fibre, Carbon fibe, aramid fiber; Add the metal-powder such as copper powder, lead powder or thin slice and utilize grafting, block copolymerization to introduce on polyoxymethylene molecular chain and there is oilness segment etc.
At present, about some progress that the friction and wear behavior study on the modification of POM has been got.Patent CN101885896A adopts polyoxyethylene and polytetrafluoroethylene fiber to be lubricating modification agent, patent CN102161812B adopts carbon fiber and molybdenumdisulphide to be lubricating modification agent, patent US5824742 with polyolefine and dimethylsiloxane polymer for lubricant improves the friction and wear behavior of polyoxymethylene.
Summary of the invention
For above-mentioned technical problem of the prior art, the invention provides a kind of wear-resisting polyformaldehyde matrix material and preparation method thereof, it is bigger than normal that described this wear-resisting polyformaldehyde matrix material and preparation method thereof solves pure polyoxymethylene frictional coefficient, can only be used for low speed, low year, under low load condition, be difficult to the technical problem meeting the conducting power such as precision optical machinery, electronic apparatus component high speed, high pressure, high temperature, light-weighted requirement.
The invention provides a kind of wear-resisting polyformaldehyde matrix material, the mass percentage content of each composition is as follows:
Further, described polyformaldehyde resin is copolymerized methanal or acefal homopolymer.
Further, described aramid fiber is the one or more kinds of combinations in aramid fiber (long fine, short fiber), aramid pulp or aramid fiber powder.
Further, described compatilizer is ethylene-acrylic acid copolymer, and wherein acrylic acid content is 1 ~ 30%.
Further, described dispersion agent is white oil.
Present invention also offers the preparation method of above-mentioned a kind of wear-resisting polyformaldehyde matrix material, comprise the steps:
1) first polyoxymethylene and aramid fiber powder to be placed in respectively at vacuum drying oven 70 ~ 85 DEG C dry 4 ~ 8 hours;
2) polyoxymethylene, aramid fiber, compatilizer and dispersion agent are joined in a high-speed mixer by prescription quality percentage and fully mix, mixing time is 5 ~ 10 minutes;
3) be added in twin screw extruder by compound and carry out melt blending, extruding pelletization, each zone temperature of barrel controls at 150 ~ 200 DEG C, and screw speed is 150 ~ 400 revs/min.
The present invention, by adopting the reasonable compound of polyformaldehyde resin, aramid fiber, compatilizer and dispersion agent, has prepared that to have friction and wear behavior good, the wear-resisting polyformaldehyde matrix material that self-lubricating effect is good, and preparation technology is simple and convenient, and production unit is simple to operate.
The present invention compares with prior art, and its technical progress is significant.Instant invention overcomes the defect of prior art, provide a kind of friction and wear behavior good, the wear-resisting polyformaldehyde matrix material that self-lubricating effect is good.
Embodiment
With specific embodiment, the present invention is described below, but is not used for limiting the scope of the invention.
Embodiment 1
A kind of wear-resisting polyformaldehyde matrix material, the mass percentage content of each composition is as follows:
Polyoxymethylene: 98.5wt%,
Aramid fiber: 1wt%,
EAA：0.3wt％，
White oil: 0.2wt%.
Mixed by above-mentioned materials, adopt twin screw extruder melting shearing, extruding pelletization, each zone temperature of barrel controls at 150 ~ 200 DEG C, and screw speed is 150 ~ 400 revs/min.The modification pellet of gained is placed in dry 4 ~ 8 hours of the baking oven of 80 DEG C, adopts injection molding method to prepare the test bars of mechanical property and friction and wear behavior.Its test value is as shown in table 1.
Embodiment 2
A kind of wear-resisting polyformaldehyde matrix material, the mass percentage content of each composition is as follows:
Polyoxymethylene: 68wt%,
Aramid fiber: 25wt%,
EAA：5.5wt％，
White oil: 1.5wt%.
Mixed by above-mentioned materials, adopt twin screw extruder melting shearing, extruding pelletization, each zone temperature of barrel controls at 150 ~ 200 DEG C, and screw speed is 150 ~ 400 revs/min.The modification pellet of gained is placed in dry 4 ~ 8 hours of the baking oven of 80 DEG C, adopts injection molding method to prepare the test bars of mechanical property and friction and wear behavior.Its test value is as shown in table 1.
Embodiment 3
A kind of wear-resisting polyformaldehyde matrix material, the mass percentage content of each composition is as follows:
Polyoxymethylene: 48wt%,
Aramid fiber: 40wt%,
EAA：10wt％，
White oil: 2wt%.
Mixed by above-mentioned materials, adopt twin screw extruder melting shearing, extruding pelletization, each zone temperature of barrel controls at 150 ~ 200 DEG C, and screw speed is 150 ~ 400 revs/min.The modification pellet of gained is placed in dry 4 ~ 8 hours of the baking oven of 80 DEG C, adopts injection molding method to prepare the test bars of mechanical property and friction and wear behavior.Its test value is as shown in table 1.
Comparative example
Polyoxymethylene: 100wt%
Pure POM is through twin screw extruder melting shearing, extruding pelletization, and each zone temperature of barrel controls at 150 ~ 200 DEG C, and screw speed is 150 ~ 400 revs/min.The modification pellet of gained is placed in dry 4 ~ 8 hours of the baking oven of 80 DEG C, adopts injection molding method to prepare the test bars of mechanical property and friction and wear behavior.Its test value is as shown in table 1.
The mechanical property of table 1 polyoxymethylene and matrix material thereof and friction and wear behavior
As seen from the above table: the purer polyoxymethylene of polyformaldehyde composite material has more excellent wear resisting property and the modulus of Geng Gao.After adding aramid fiber and EAA, low obviously than pure polyoxymethylene of the quality wearing and tearing of matrix material, reduces to 0.2106g from the quality wearing and tearing 0.3421g of pure polyoxymethylene.Friction and wear behavior of the present invention and self-lubricating effect are better than pure polyoxymethylene as can be seen here.
The above is only the citing of embodiments of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (6)
1. a wear-resisting polyformaldehyde matrix material, is characterized in that, the mass percentage content of each composition is as follows:
Polyoxymethylene 48% ~ 98.5%,
Aramid fiber 1% ~ 40%,
Compatilizer 0.3% ~ 10%,
Dispersion agent 0.2% ~ 2%.
2. wear-resisting polyformaldehyde matrix material according to claim 1, is characterized in that: described polyformaldehyde resin is copolymerized methanal or acefal homopolymer.
3. wear-resisting polyformaldehyde matrix material according to claim 1, is characterized in that: described aramid fiber is the one or more kinds of combinations in aramid fiber, aramid pulp or aramid fiber powder.
4. wear-resisting polyformaldehyde matrix material according to claim 1, is characterized in that: described compatilizer is ethylene-acrylic acid copolymer, and wherein acrylic acid content is 1 ~ 30%.
5. wear-resisting polyformaldehyde matrix material according to claim 1, is characterized in that: described dispersion agent is white oil.
6. the preparation method of a kind of wear-resisting polyformaldehyde matrix material according to claim 1, is characterized in that comprising the steps:
1) first polyoxymethylene and aramid fiber powder to be placed in respectively at vacuum drying oven 70 ~ 85 DEG C dry 4 ~ 8 hours;
2) polyoxymethylene, aramid fiber, compatilizer and dispersion agent are joined in a high-speed mixer by prescription quality percentage and fully mix, mixing time is 5 ~ 10 minutes;
3) be added in twin screw extruder by compound and carry out melt blending, extruding pelletization, each zone temperature of barrel controls at 150 ~ 200 DEG C, and screw speed is 150 ~ 400 revs/min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107118599A (en) * | 2017-05-17 | 2017-09-01 | 河北金力新能源科技股份有限公司 | A kind of fire resistant water-based aramid fiber coating lithium ion battery diaphragm and preparation method thereof |
| CN109912923A (en) * | 2019-02-21 | 2019-06-21 | 浙江中达精密部件股份有限公司 | A kind of wear-resisting polyformaldehyde material and preparation method thereof |
| CN110527242A (en) * | 2019-07-25 | 2019-12-03 | 嘉善华正五金机械厂 | A kind of engineering plastics self-lubricating bearing material preparation method |
| CN115124810A (en) * | 2022-08-03 | 2022-09-30 | 烟台恒大聚合体有限公司 | Wear-resistant, scratch-resistant and conductive POM composite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102250481A (en) * | 2011-05-25 | 2011-11-23 | 上海树普新材料科技有限公司 | Plastic with high thermal conductivity and preparation method thereof |
| CN102850646A (en) * | 2011-06-27 | 2013-01-02 | 滁州格美特科技有限公司 | Flame-retardant antistatic high-strength thermoplastic composite material and its preparation method |
| CN103772895A (en) * | 2012-10-25 | 2014-05-07 | 黑龙江鑫达企业集团有限公司 | Continuous aramid fiber-reinforced polyformaldehyde material and preparation method thereof |
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2015
- 2015-10-09 CN CN201510648328.9A patent/CN105219016A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250481A (en) * | 2011-05-25 | 2011-11-23 | 上海树普新材料科技有限公司 | Plastic with high thermal conductivity and preparation method thereof |
| CN102850646A (en) * | 2011-06-27 | 2013-01-02 | 滁州格美特科技有限公司 | Flame-retardant antistatic high-strength thermoplastic composite material and its preparation method |
| CN103772895A (en) * | 2012-10-25 | 2014-05-07 | 黑龙江鑫达企业集团有限公司 | Continuous aramid fiber-reinforced polyformaldehyde material and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107118599A (en) * | 2017-05-17 | 2017-09-01 | 河北金力新能源科技股份有限公司 | A kind of fire resistant water-based aramid fiber coating lithium ion battery diaphragm and preparation method thereof |
| CN109912923A (en) * | 2019-02-21 | 2019-06-21 | 浙江中达精密部件股份有限公司 | A kind of wear-resisting polyformaldehyde material and preparation method thereof |
| CN110527242A (en) * | 2019-07-25 | 2019-12-03 | 嘉善华正五金机械厂 | A kind of engineering plastics self-lubricating bearing material preparation method |
| CN115124810A (en) * | 2022-08-03 | 2022-09-30 | 烟台恒大聚合体有限公司 | Wear-resistant, scratch-resistant and conductive POM composite material and preparation method thereof |
| CN115124810B (en) * | 2022-08-03 | 2023-10-03 | 烟台恒大聚合体有限公司 | Wear-resistant scratch-resistant conductive POM composite material and preparation method thereof |
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