CN103627135A - Polyformaldehyde compound with high toughness and high wear-resistance and preparing method therefor - Google Patents
Polyformaldehyde compound with high toughness and high wear-resistance and preparing method therefor Download PDFInfo
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- CN103627135A CN103627135A CN201210297008.XA CN201210297008A CN103627135A CN 103627135 A CN103627135 A CN 103627135A CN 201210297008 A CN201210297008 A CN 201210297008A CN 103627135 A CN103627135 A CN 103627135A
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Abstract
The invention discloses a polyformaldehyde compound with high toughness and high wear-resistance and a preparing method therefor. The polyformaldehyde compound with high toughness and high wear-resistance is composed of, by weight, 100 parts of polyformaldehyde, 10-20 parts of polytetrafluoroethylene, 10-16 parts of polyoxyethylene, 5-7 parts of ethylene propylene diene monomer, 3-5 parts of butadiene styrene rubber, 10-15 parts of thermoplastic polyurethane TPU, 0.2-0.6 parts of styrenated phenol, 0.1-0.3 parts of anti-oxidant 1010, and 1-3 parts of calcium silicate. According to the invention, the toughness and wear-resistance of the polyformaldehyde are synchronously modified, the polyformaldehyde compound with high toughness and high wear-resistance is prepared, the processing technology is simple, parameters are easy to control, the cost of raw materials is appropriate, and the quality of obtained products is stable. The polyformaldehyde compound with high toughness and high wear-resistance can be widely used in fields of parts manufacturing of large machinery and precision instruments, hardware and building materials, weaving fittings, transportation tools such as automobiles, etc.
Description
Technical field
The present invention relates to a kind of plastics and preparation method thereof, relate in particular to a kind of high-toughness wear-resistant polyformaldehyde mixture and preparation method thereof.
Background technology
Polyoxymethylene (English: polyformaldehyde), be a kind of thermoplasticity crystalline polymer.Be described as " supersteel " or " match steel ", claim again polyoxymethylene, english abbreviation is POM.The polymkeric substance of common oxymethylene polymerization gained, the polymerization degree is not high, and is subject to thermal depolymerization.
Polyoxymethylene is a kind of smooth surface, and glossiness hard and fine and close material is yellowish or white, can be at life-time service in-40-100 ℃ temperature range.Its wear resistance and self lubricity are also superior than most engineering plastics, have again good oil resistant, resistance to superoxide performance.Very not acidproof, not resistance to highly basic and the not radiation of resistance to solar ultraviolet.
Polyoxymethylene water-absorbent is little, and dimensional stabilizing is glossy, and these performances are all good than nylon, and the resin that polyoxymethylene is highly crystalline is the most tough and tensile in thermoplastic resin.Tool heat resistanceheat resistant intensity, flexural strength, resistance to fatigue intensity is all high, and wear resistance and electrical property are good.
Polyoxymethylene has good mechanical property.Its shock strength is high, and Young's modulus and rigidity are higher, and resistance to fatigue is good, and creep-resistant property is good.Dimensional stability and shaping processability can be good.But polyoxymethylene is due to its special molecular chain structure, and very easily crystallization in the process of forming process, generates larger-size spherocrystal; When material is subject to impacting, spherocrystal easily forms focal point of stress, causes the destruction of material.So polyoxymethylene is very sensitive to breach, its notched Izod impact strength is lower, thereby can not meet the requirement of mechanical manufacturing field to its performance, and this has greatly limited the use range of polyoxymethylene.Therefore, the Research on Toughening of polyoxymethylene is subject to larger attention always.
But there is the shortcomings such as wear resisting property is poor, toughening effect is unsatisfactory in polyoxymethylene at present.
Summary of the invention
For above shortcomings in prior art, one of technical problem to be solved by this invention is to provide a kind of high-toughness wear-resistant polyformaldehyde mixture.
Two of technical problem to be solved by this invention is to provide a kind of preparation method of high-toughness wear-resistant polyformaldehyde mixture.
Technical problem to be solved by this invention, is achieved by the following technical solution:
A kind of high-toughness wear-resistant polyformaldehyde mixture, by following component, formed by weight: 100 parts of polyoxymethylene, tetrafluoroethylene 10-20 part, polyoxyethylene 10-16 part, terpolymer EP rubber 5-7 part, styrene-butadiene rubber(SBR) 3-5 part, thermoplastic polyurethane TPU 10-15 part, styrenated phenol 0.2-0.6 part, antioxidant 1010 0.1-0.3 part, Calucium Silicate powder 1-3 part.
The preparation method of high-toughness wear-resistant polyformaldehyde mixture provided by the present invention, comprises the following steps:
(1) polyoxymethylene, tetrafluoroethylene, terpolymer EP rubber, styrene-butadiene rubber(SBR) and thermoplastic polyurethane TPU are dried respectively to 8-10 hour at 70-90 ℃ of temperature;
(2) by dried polyoxymethylene, tetrafluoroethylene, terpolymer EP rubber, styrene-butadiene rubber(SBR) and thermoplastic polyurethane TPU, and styrenated phenol, antioxidant 1010 and Calucium Silicate powder, be placed in super mixer and mix;
(3) material mixing is added to double-screw extruding pelletizing machine, at 160-180 ℃, carry out melt blending and extrude;
(4) the mixture melt tie rod of extruding is cooling, and pelletizing on dicing machine, sieve, dry.
Preferably,
In described step (3), screw speed is 200-220 rev/min.
In described step (3), head extrusion temperature is at 180-185 ℃.
In described step (3), melt pressure is 40-45Mpa.
In described step (3), moment of torsion is 60-70N.m.
The present invention has realized synchronizes modification to polyoxymethylene toughness reinforcing and wear-resisting, has been prepared into the polyformaldehyde compound that has high tenacity and high-wearing feature concurrently, and complete processing is simple, and parameter is easily controlled, and raw materials cost is moderate, resulting constant product quality.This high-toughness wear-resistant polyformaldehyde mixture can be widely used in the fields such as transport facility, five metals building materials, textile workpiece such as the component manufacture, automobile of big machinery, precision instrument, also be various mechanical power drive disk assembly main raws, there is good industrial prospect.
Embodiment
By embodiment, the invention will be further described, but the present invention is not limited by following examples.
Embodiment 1
Polyoxymethylene, tetrafluoroethylene, terpolymer EP rubber, styrene-butadiene rubber(SBR) and thermoplastic polyurethane TPU are dried respectively to 8-10 hour in the loft drier of 80 ℃ of left and right, standby.
Take:
100 kilograms of polyoxymethylene, 10 kilograms of tetrafluoroethylene, 16 kilograms of polyoxyethylenes, 5 kilograms of terpolymer EP rubbers, 5 kilograms, styrene-butadiene rubber(SBR), 10 kilograms of thermoplastic polyurethane TPU, 0.6 kilogram of styrenated phenol, 0.1 kilogram of antioxidant 1010,3 kilograms of Calucium Silicate powder.
Above-mentioned raw materials is placed in super mixer and is mixed.
The material mixing is added to double-screw extruding pelletizing machine, carry out melt blending and extrude at 170 ℃, screw speed is 210 revs/min, and head extrusion temperature is at 180 ℃, and melt pressure is 45Mpa, and moment of torsion is 60N.m.
The mixture melt tie rod of extruding is cooling, and pelletizing on dicing machine, sieve, dry, can make high-toughness wear-resistant polyformaldehyde mixture of the present invention.
Prepared pellet is fully dry in 80 ℃ of vacuum drying ovens, on injection moulding machine, be injected into standard Mechanics Performance Testing batten and frictional experiment batten.Wherein, mechanical property is measured according to U.S. ASTM standard, and frictional behaviour is measured according to GB national standard.Result is as shown in table 1.
Embodiment 2
Polyoxymethylene, tetrafluoroethylene, terpolymer EP rubber, styrene-butadiene rubber(SBR) and thermoplastic polyurethane TPU are dried respectively to 8-10 hour in the loft drier of 80 ℃ of left and right, standby.
Take:
100 kilograms of polyoxymethylene, 20 kilograms of tetrafluoroethylene, 10 kilograms of polyoxyethylenes, 7 kilograms of terpolymer EP rubbers, 3 kilograms, styrene-butadiene rubber(SBR), thermoplastic polyurethane TPU15 kilogram, 0.2 kilogram of styrenated phenol, 0.3 kilogram of antioxidant 1010,1 kilogram of Calucium Silicate powder.
Above-mentioned raw materials is placed in super mixer and is mixed.
The material mixing is added to double-screw extruding pelletizing machine, carry out melt blending and extrude at 160-180 ℃, screw speed is 220 revs/min, and head extrusion temperature is at 185 ℃, and melt pressure is 40Mpa, and moment of torsion is 70N.m.
The mixture melt tie rod of extruding is cooling, and pelletizing on dicing machine, sieve, dry, can make high-toughness wear-resistant polyformaldehyde mixture of the present invention.
Table 1
| Performance index | Testing standard | Embodiment 1 | Embodiment 2 |
| Notched Izod impact strength, J/m | ASTM-D256 | 132.4 | 133.6 |
| Draw high intensity, Mpa | ASTM-D638 | 52.8 | 52.4 |
| Draw high modulus, Mpa | ASTM-D638 | 2505 | 2524 |
| Elongation at break, % | ASTM-D638 | 42.5 | 41.8 |
| Flexural strength, Mpa | ASTM-D790 | 62.4 | 62.8 |
| Modulus in flexure, Mpa | ASTM-D790 | 2.21 | 2.17 |
| Static friction coefficient | GB/T3960 | 0.174 | 0.172 |
| Abrasion loss, mg | GB/T3960 | 16.5 | 16.7 |
The present invention has realized synchronizes modification to polyoxymethylene toughness reinforcing and wear-resisting, has been prepared into the polyformaldehyde compound that has high tenacity and high-wearing feature concurrently, and complete processing is simple, and parameter is easily controlled, and raw materials cost is moderate, resulting constant product quality.This high-toughness wear-resistant polyformaldehyde mixture can be widely used in the fields such as transport facility, five metals building materials, textile workpiece such as the component manufacture, automobile of big machinery, precision instrument, also be various mechanical power drive disk assembly main raws, there is good industrial prospect.
The above; it is only the specific embodiment of the present invention; but protection scope of the present invention is not limited to this; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; the variation that can expect without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (7)
1. a high-toughness wear-resistant polyformaldehyde mixture, is comprised of following component: polyoxymethylene, tetrafluoroethylene, polyoxyethylene, terpolymer EP rubber, styrene-butadiene rubber(SBR), thermoplastic polyurethane TPU, styrenated phenol, antioxidant 1010 and Calucium Silicate powder.
2. high-toughness wear-resistant polyformaldehyde mixture as claimed in claim 1, it is characterized in that, by following component, formed by weight: 100 parts of polyoxymethylene, tetrafluoroethylene 10-20 part, polyoxyethylene 10-16 part, terpolymer EP rubber 5-7 part; styrene-butadiene rubber(SBR) 3-5 part, thermoplastic polyurethane TPU 10-15 part, styrenated phenol 0.2-0.6 part; antioxidant 1010 0.1-0.3 part, Calucium Silicate powder 1-3 part.
3. the preparation method of high-toughness wear-resistant polyformaldehyde mixture as claimed in claim 1 or 2, is characterized in that, comprises the following steps:
(1) polyoxymethylene, tetrafluoroethylene, terpolymer EP rubber, styrene-butadiene rubber(SBR) and thermoplastic polyurethane TPU are dried respectively to 8-10 hour at 70-90 ℃ of temperature;
(2) by dried polyoxymethylene, tetrafluoroethylene, terpolymer EP rubber, styrene-butadiene rubber(SBR) and thermoplastic polyurethane TPU, and styrenated phenol, antioxidant 1010 and Calucium Silicate powder, be placed in super mixer and mix;
(3) material mixing is added to double-screw extruding pelletizing machine, at 160-180 ℃, carry out melt blending and extrude;
(4) the mixture melt tie rod of extruding is cooling, and pelletizing on dicing machine, sieve, dry.
4. the preparation method of high-toughness wear-resistant polyformaldehyde mixture as claimed in claim 3, is characterized in that: in described step (3), screw speed is 200-220 rev/min.
5. the preparation method of high-toughness wear-resistant polyformaldehyde mixture as claimed in claim 3, is characterized in that: in described step (3), head extrusion temperature is at 180-185 ℃.
6. the preparation method of high-toughness wear-resistant polyformaldehyde mixture as claimed in claim 3, is characterized in that: in described step (3), melt pressure is 40-45Mpa.
7. the preparation method of high-toughness wear-resistant polyformaldehyde mixture as claimed in claim 3, is characterized in that: in described step (3), moment of torsion is 60-70N.m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210297008.XA CN103627135A (en) | 2012-08-20 | 2012-08-20 | Polyformaldehyde compound with high toughness and high wear-resistance and preparing method therefor |
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| CN201210297008.XA CN103627135A (en) | 2012-08-20 | 2012-08-20 | Polyformaldehyde compound with high toughness and high wear-resistance and preparing method therefor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106633608A (en) * | 2016-12-13 | 2017-05-10 | 无锡市四方达高分子材料有限公司 | Novel wear-resistant high-molecular material |
| CN107129655A (en) * | 2017-06-08 | 2017-09-05 | 东莞市联洲知识产权运营管理有限公司 | A kind of novel antistatic polyurethane/polyformaldehyde composite material and preparation method thereof |
-
2012
- 2012-08-20 CN CN201210297008.XA patent/CN103627135A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106633608A (en) * | 2016-12-13 | 2017-05-10 | 无锡市四方达高分子材料有限公司 | Novel wear-resistant high-molecular material |
| CN107129655A (en) * | 2017-06-08 | 2017-09-05 | 东莞市联洲知识产权运营管理有限公司 | A kind of novel antistatic polyurethane/polyformaldehyde composite material and preparation method thereof |
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Application publication date: 20140312 |