CN105038048A - Reinforced PTFE and preparation method thereof - Google Patents
Reinforced PTFE and preparation method thereof Download PDFInfo
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- CN105038048A CN105038048A CN201510384756.5A CN201510384756A CN105038048A CN 105038048 A CN105038048 A CN 105038048A CN 201510384756 A CN201510384756 A CN 201510384756A CN 105038048 A CN105038048 A CN 105038048A
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Abstract
The invention discloses a reinforced PTFE and a preparation method thereof. Raw materials of the reinforced PTFE comprise PTFE, glass fibers, carbon fibers, POM, meerschaum fibers, 2-methylimidazole, magnesium salt whisker, a titanate coupling agent, alumina and ABS. The friction coefficient of the above product is 0.05-0.25, the wear scar width is minimum, the transverse shrinkage is 0.8-1.2%, the vertical shrinkage is 0.6-1%, the shrinkage ratio is 0.6-1, and the thermal deformation temperature is 260-280DEG C; the tensile strength is 20-60MPa, the impact strength is 70-110kJ/m<2>, and the elongation at break is 8-12%; and the bending strength is 30-70MPa, the Young's modulus is 6.5-8.5GPa, and the Shore hardness is 62-66D.
Description
Technical field
The present invention relates to plastics arts, particularly relate to a kind of enhancing PTFE and preparation method thereof.
Background technology
Plastic pellet is being commonly called as of plastic grain, and to be plastics carry out storing with work in-process form, transport and the raw material of machine-shaping.Plastics are family macromolecule materials, are that raw material can obtain ethene, propylene, vinylchlorid, vinylbenzene etc. with oil, and the molecule of these materials can react to each other under certain condition and generate the very large compound of molecular weight, i.e. polymer.
The most outstanding character of polypropylene is versatility, and it can be suitable for many working methods and purposes.Its value and versatility mainly from excellent chemical resistance, in the thermoplastics of ancestor in minimum density and the highest fusing point, moderate cost.
Plastics are derivatives of oil, and the market value of plastics depends on the equilibrium of supply and demand in market.The plastics market of China has plastics material of an established trade mark, secondary board material, and reprocessed plastic(s) are formed, and international turn of the market is not very large on domestic impact, and much cheap plastic waste is come from external import, has delayed the impact of International Crude Oil variation on China market.But the ups and downs of international oil price are certainly influential, and plastic waste price is also in ups and downs.
Polyethylene, polypropylene, polyvinyl chloride, polystyrene, our normally used plastics are exactly by above-mentioned four kinds of molecular materials of high score (polyethylene, sound embrittlement during polypropylene film shake; Polyvinyl chloride film is then more soft, without embrittlement sound during shake; Expanded plastic is generally polystyrene, has dense smoke during burning).Begin from the sixties in last century, plastics enter the extensive practical stage, because plastics have lot of advantages: it draws materials easily, cheap, easy to process, quality is light and handy, and therefore plastics one come out, just deeply welcome by the world, it penetrates into different social sectors rapidly, and plastics are made into bowl, cup, bag, basin, bucket, pipe etc., and plastics are listed in one of 20th century greatest invention, the universal of plastics is described as White Revolution.Along with plastics output constantly increases, cost is more and more lower, a large amount of agricultural films that we used, and wrapping plastics bag and disposable plastic tableware are abandoned after a procedure in the environment, are brought very havoc to view and environment.Because plastic packing article is mostly in white, the environmental pollution that they cause is called as white pollution.
Tetrafluoroethylene, is generally called " non-sticky metallic coating " or " material easy to clean.This material has the feature of antiacid alkali resistant, anti-various organic solvent, is dissolved in all solvents hardly.Meanwhile, tetrafluoroethylene has resistant to elevated temperatures feature, and its frictional coefficient is extremely low, so after can making lubrication, also becomes the desirable coating of water pipe internal layer easy to clean.
Why difficult PTFE is sticky, and mainly contain several reason below: the first, surface energy is low, and critical surface tension generally only has 31 ~ 34 dynes per centimeter.Because surface energy is low, contact angle is large, and tackiness agent fully can not soak PTFE, thus can not stick on PTFE very well; The second, degree of crystallinity is large, and chemical stability is good, and the swelling and dissolving of PTFE, all than noncrystalline polymer difficulty, when tackiness agent is coated in PTFE surface, is difficult to that high-polymer molecular chain chaining territory occurs and spreads mutually and tangle, can not form stronger adhesive power; Three, PTFE structure height is symmetrical, is also belong to non-polar high polymer.And tackiness agent is adsorbed on PTFE surface caused by Van der Waals force (Intermolecular Forces), Van der Waals force comprises dipole-dipole force, inductive capacity and London force.For non-polar polymeric material surface, do not possess the condition forming dipole-dipole force and inductive capacity, and can only form more weak London force, thus adhesion property is poor.
Summary of the invention
The invention provides that a kind of tensile strength is high, flexural strength is high, shock strength is high and enhancing PTFE that elongation at break is high and preparation method thereof, solve the technical problems such as the low and flexural strength of existing plastic pellet tensile strength is low.
The present invention is by the following technical solutions: a kind ofly strengthen PTFE, it is as follows that mass fraction proportioning pressed by its raw material: PTFE100 part, glass fibre 10-30 part, carbon fiber 5-25 part, POM40-80 part, sepiolite fibre 1-20 part, glyoxal ethyline 5-25 part, magnesium salt whisker 15-55 part, titanate coupling agent 4-8 part, aluminium sesquioxide 20-40 part, ABS15-35 part.
As a preferred technical solution of the present invention: it is as follows that mass fraction proportioning pressed by the raw material of described enhancing PTFE: PTFE100 part, 15 parts, glass fibre, 10 parts, carbon fiber, POM50 part, sepiolite fibre 5 parts, glyoxal ethyline 10 parts, magnesium salt whisker 25 parts, titanate coupling agent 5 parts, aluminium sesquioxide 25 parts, ABS20 part.
As a preferred technical solution of the present invention: it is as follows that mass fraction proportioning pressed by the raw material of described enhancing PTFE: PTFE100 part, 25 parts, glass fibre, 20 parts, carbon fiber, POM70 part, sepiolite fibre 15 parts, glyoxal ethyline 20 parts, magnesium salt whisker 45 parts, titanate coupling agent 7 parts, aluminium sesquioxide 35 parts, ABS30 part.
As a preferred technical solution of the present invention: it is as follows that mass fraction proportioning pressed by the raw material of described enhancing PTFE: PTFE100 part, 20 parts, glass fibre, 15 parts, carbon fiber, POM60 part, sepiolite fibre 10 parts, glyoxal ethyline 15 parts, magnesium salt whisker 35 parts, titanate coupling agent 6 parts, aluminium sesquioxide 30 parts, ABS25 part.
Prepare a method of described enhancing PTFE, step is:
The first step: take PTFE, glass fibre, carbon fiber, POM, sepiolite fibre, glyoxal ethyline, magnesium salt whisker, titanate coupling agent, aluminium sesquioxide and ABS according to mass fraction proportioning;
Second step: glass fibre and titanate coupling agent are dropped in reactor and mix 25-45min, add PTFE, carbon fiber, POM and glyoxal ethyline, be warming up to 60-80 DEG C, with 160-200r/min speed mixing 40-60min;
3rd step: add sepiolite fibre, magnesium salt whisker, titanate coupling agent, aluminium sesquioxide and ABS, mixes rear input twin screw extruder, extruding pelletization at being warming up to 210-230 DEG C.
beneficial effect
One of the present invention strengthens PTFE and preparation method thereof and adopts above technical scheme compared with prior art, there is following technique effect: 1, product frictional coefficient 0.05-0.25, wear scar width is minimum, lateral shrinkage 0.8-1.2%, longitudinal contraction rate 0.6-1%, contraction ratio 0.6-1, heat-drawn wire 260-280 DEG C; 2, tensile strength 20-60MPa, shock strength 70-110kJ/m
2, elongation at break 8-12%; 3, flexural strength 30-70MPa, Young's modulus 6.5-8.5GPa, shore hardness 62-66D, preparation method is simple, and raw material is simple and easy to get, the widespread production not division of history into periods can replace current material.
Embodiment
Below in conjunction with example, the invention will be further described, and embodiment, only for the present invention will be described, does not form the restriction to right, and other alternative means that it may occur to persons skilled in the art that, all within the scope of the claims in the present invention.
Embodiment 1:
The first step: take PTFE100 part according to mass fraction proportioning, 10 parts, glass fibre, 5 parts, carbon fiber, POM40 part, sepiolite fibre 1 part, glyoxal ethyline 5 parts, magnesium salt whisker 15 parts, titanate coupling agent 4 parts, aluminium sesquioxide 20 parts, ABS15 part.
Second step: glass fibre and titanate coupling agent are dropped in reactor and mix 25min, add PTFE, carbon fiber, POM and glyoxal ethyline, be warming up to 60 DEG C, with 160r/min speed mixing 40min.
3rd step: add sepiolite fibre, magnesium salt whisker, titanate coupling agent, aluminium sesquioxide and ABS, mixes rear input twin screw extruder, extruding pelletization at being warming up to 210 DEG C.
Product frictional coefficient 0.25, wear scar width is minimum, lateral shrinkage 0.8%, longitudinal contraction rate 0.6%, contraction ratio 0.6, heat-drawn wire 260 DEG C; Tensile strength 20MPa, shock strength 70kJ/m
2, elongation at break 8%; Flexural strength 30MPa, Young's modulus 6.5GPa, shore hardness 62D.
Embodiment 2:
The first step: take PTFE100 part according to mass fraction proportioning, 30 parts, glass fibre, 25 parts, carbon fiber, POM80 part, sepiolite fibre 20 parts, glyoxal ethyline 25 parts, magnesium salt whisker 55 parts, titanate coupling agent 8 parts, aluminium sesquioxide 40 parts, ABS35 part.
Second step: glass fibre and titanate coupling agent are dropped in reactor and mix 45min, add PTFE, carbon fiber, POM and glyoxal ethyline, be warming up to 80 DEG C, with 200r/min speed mixing 60min.
3rd step: add sepiolite fibre, magnesium salt whisker, titanate coupling agent, aluminium sesquioxide and ABS, mixes rear input twin screw extruder, extruding pelletization at being warming up to 230 DEG C.
Product frictional coefficient 0.2, wear scar width is minimum, lateral shrinkage 0.9%, longitudinal contraction rate 0.7%, contraction ratio 0.7, heat-drawn wire 265 DEG C; Tensile strength 30MPa, shock strength 80kJ/m
2, elongation at break 9%; Flexural strength 40MPa, Young's modulus 7GPa, shore hardness 63D.
Embodiment 3:
The first step: take PTFE100 part according to mass fraction proportioning, 15 parts, glass fibre, 10 parts, carbon fiber, POM50 part, sepiolite fibre 5 parts, glyoxal ethyline 10 parts, magnesium salt whisker 25 parts, titanate coupling agent 5 parts, aluminium sesquioxide 25 parts, ABS20 part.
Second step: glass fibre and titanate coupling agent are dropped in reactor and mix 25min, add PTFE, carbon fiber, POM and glyoxal ethyline, be warming up to 60 DEG C, with 160r/min speed mixing 40min.
3rd step: add sepiolite fibre, magnesium salt whisker, titanate coupling agent, aluminium sesquioxide and ABS, mixes rear input twin screw extruder, extruding pelletization at being warming up to 230 DEG C.
Product frictional coefficient 0.15, wear scar width is minimum, lateral shrinkage 1%, longitudinal contraction rate 0.8%, contraction ratio 0.8, heat-drawn wire 270 DEG C; Tensile strength 40MPa, shock strength 90kJ/m
2, elongation at break 10%; Flexural strength 50MPa, Young's modulus 7.5GPa, shore hardness 64D.
Embodiment 4:
The first step: take PTFE100 part according to mass fraction proportioning, 25 parts, glass fibre, 20 parts, carbon fiber, POM70 part, sepiolite fibre 15 parts, glyoxal ethyline 20 parts, magnesium salt whisker 45 parts, titanate coupling agent 7 parts, aluminium sesquioxide 35 parts, ABS30 part.
Second step: glass fibre and titanate coupling agent are dropped in reactor and mix 45min, add PTFE, carbon fiber, POM and glyoxal ethyline, be warming up to 80 DEG C, with 200r/min speed mixing 60min.
3rd step: add sepiolite fibre, magnesium salt whisker, titanate coupling agent, aluminium sesquioxide and ABS, mixes rear input twin screw extruder, extruding pelletization at being warming up to 230 DEG C.
Product frictional coefficient 0.1, wear scar width is minimum, lateral shrinkage 1.1%, longitudinal contraction rate 0.9%, contraction ratio 0.9, heat-drawn wire 275 DEG C; Tensile strength 50MPa, shock strength 100kJ/m
2, elongation at break 11%; Flexural strength 60MPa, Young's modulus 8GPa, shore hardness 65D.
Embodiment 5:
The first step: take PTFE100 part according to mass fraction proportioning, 20 parts, glass fibre, 15 parts, carbon fiber, POM60 part, sepiolite fibre 10 parts, glyoxal ethyline 15 parts, magnesium salt whisker 35 parts, titanate coupling agent 6 parts, aluminium sesquioxide 30 parts, ABS25 part.
Second step: glass fibre and titanate coupling agent are dropped in reactor and mix 35min, add PTFE, carbon fiber, POM and glyoxal ethyline, be warming up to 70 DEG C, with 180r/min speed mixing 50min.
3rd step: add sepiolite fibre, magnesium salt whisker, titanate coupling agent, aluminium sesquioxide and ABS, mixes rear input twin screw extruder, extruding pelletization at being warming up to 220 DEG C.
Product frictional coefficient 0.05, wear scar width is minimum, lateral shrinkage 1.2%, longitudinal contraction rate 1%, contraction ratio 1, heat-drawn wire 280 DEG C; Tensile strength 60MPa, shock strength 110kJ/m
2, elongation at break 12%; Flexural strength 70MPa, Young's modulus 8.5GPa, shore hardness 66D.
Claims (5)
1. one kind strengthens PTFE, it is characterized in that, it is as follows that mass fraction proportioning pressed by the raw material of described enhancing PTFE: PTFE100 part, glass fibre 10-30 part, carbon fiber 5-25 part, POM40-80 part, sepiolite fibre 1-20 part, glyoxal ethyline 5-25 part, magnesium salt whisker 15-55 part, titanate coupling agent 4-8 part, aluminium sesquioxide 20-40 part, ABS15-35 part.
2. one according to claim 1 strengthens PTFE, it is characterized in that, it is as follows that mass fraction proportioning pressed by the raw material of described enhancing PTFE: PTFE100 part, 15 parts, glass fibre, 10 parts, carbon fiber, POM50 part, sepiolite fibre 5 parts, glyoxal ethyline 10 parts, magnesium salt whisker 25 parts, titanate coupling agent 5 parts, aluminium sesquioxide 25 parts, ABS20 part.
3. one according to claim 1 strengthens PTFE, it is characterized in that, it is as follows that mass fraction proportioning pressed by the raw material of described enhancing PTFE: PTFE100 part, 25 parts, glass fibre, 20 parts, carbon fiber, POM70 part, sepiolite fibre 15 parts, glyoxal ethyline 20 parts, magnesium salt whisker 45 parts, titanate coupling agent 7 parts, aluminium sesquioxide 35 parts, ABS30 part.
4. one according to claim 1 strengthens PTFE, it is characterized in that: the raw material of described enhancing PTFE is as follows by mass fraction proportioning: PTFE100 part, 20 parts, glass fibre, 15 parts, carbon fiber, POM60 part, sepiolite fibre 10 parts, glyoxal ethyline 15 parts, magnesium salt whisker 35 parts, titanate coupling agent 6 parts, aluminium sesquioxide 30 parts, ABS25 part.
5. make a method of enhancing PTFE according to claim 1, it is characterized in that, comprise the steps:
The first step: take PTFE, glass fibre, carbon fiber, POM, sepiolite fibre, glyoxal ethyline, magnesium salt whisker, titanate coupling agent, aluminium sesquioxide and ABS according to mass fraction proportioning;
Second step: glass fibre and titanate coupling agent are dropped in reactor and mix 25-45min, add PTFE, carbon fiber, POM and glyoxal ethyline, be warming up to 60-80 DEG C, with 160-200r/min speed mixing 40-60min;
3rd step: add sepiolite fibre, magnesium salt whisker, titanate coupling agent, aluminium sesquioxide and ABS, mixes rear input twin screw extruder, extruding pelletization at being warming up to 210-230 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106496907A (en) * | 2016-11-08 | 2017-03-15 | 余姚市宏阳微电机有限公司 | A kind of machine shaft composite and preparation method thereof |
| CN109385152A (en) * | 2018-10-24 | 2019-02-26 | 河南锐盛电力科技有限公司 | A kind of construction method of power construction high-intensity building materials and electric power facility |
| CN111253661A (en) * | 2020-03-04 | 2020-06-09 | 合肥圆燃新材料有限公司 | High-strength anti-aging polyethylene composite material for photovoltaic floating body and preparation method thereof |
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| CN101775186A (en) * | 2010-02-01 | 2010-07-14 | 南京肯特新材料有限公司 | Polytetrafluoroethylene composite material and product preparation method thereof |
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| CN109385152A (en) * | 2018-10-24 | 2019-02-26 | 河南锐盛电力科技有限公司 | A kind of construction method of power construction high-intensity building materials and electric power facility |
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Application publication date: 20151111 |