CN109294211A - A kind of noise reduction corrosion-and high-temp-resistant polyurethane screen - Google Patents
A kind of noise reduction corrosion-and high-temp-resistant polyurethane screen Download PDFInfo
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- CN109294211A CN109294211A CN201811255867.6A CN201811255867A CN109294211A CN 109294211 A CN109294211 A CN 109294211A CN 201811255867 A CN201811255867 A CN 201811255867A CN 109294211 A CN109294211 A CN 109294211A
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- sieve
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- resistant
- noise reduction
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 25
- 239000004814 polyurethane Substances 0.000 title claims abstract description 25
- 230000009467 reduction Effects 0.000 title claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 32
- 239000011347 resin Substances 0.000 claims abstract description 32
- 229920001567 vinyl ester resin Polymers 0.000 claims abstract description 25
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims abstract description 17
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims abstract description 17
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 16
- 239000000945 filler Substances 0.000 claims abstract description 14
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 10
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000007822 coupling agent Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims description 23
- 239000002994 raw material Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 12
- 235000013312 flour Nutrition 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 9
- -1 haloflex Polymers 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000178 monomer Substances 0.000 claims description 8
- 238000001721 transfer moulding Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 241000270295 Serpentes Species 0.000 claims description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052622 kaolinite Inorganic materials 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 5
- 235000019792 magnesium silicate Nutrition 0.000 claims description 5
- 239000000391 magnesium silicate Substances 0.000 claims description 5
- 229910052573 porcelain Inorganic materials 0.000 claims description 5
- 239000010456 wollastonite Substances 0.000 claims description 5
- 229910052882 wollastonite Inorganic materials 0.000 claims description 5
- AZYRZNIYJDKRHO-UHFFFAOYSA-N 1,3-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=CC(C(C)(C)N=C=O)=C1 AZYRZNIYJDKRHO-UHFFFAOYSA-N 0.000 claims description 4
- MBVGJZDLUQNERS-UHFFFAOYSA-N 2-(trifluoromethyl)-1h-imidazole-4,5-dicarbonitrile Chemical compound FC(F)(F)C1=NC(C#N)=C(C#N)N1 MBVGJZDLUQNERS-UHFFFAOYSA-N 0.000 claims description 4
- WJIOHMVWGVGWJW-UHFFFAOYSA-N 3-methyl-n-[4-[(3-methylpyrazole-1-carbonyl)amino]butyl]pyrazole-1-carboxamide Chemical compound N1=C(C)C=CN1C(=O)NCCCCNC(=O)N1N=C(C)C=C1 WJIOHMVWGVGWJW-UHFFFAOYSA-N 0.000 claims description 4
- MGYGFNQQGAQEON-UHFFFAOYSA-N 4-tolyl isocyanate Chemical compound CC1=CC=C(N=C=O)C=C1 MGYGFNQQGAQEON-UHFFFAOYSA-N 0.000 claims description 4
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 4
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 239000008188 pellet Substances 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 150000003505 terpenes Chemical class 0.000 claims description 4
- 235000007586 terpenes Nutrition 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims 1
- 238000005660 chlorination reaction Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 238000012216 screening Methods 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 3
- 238000013016 damping Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a kind of noise reduction corrosion-and high-temp-resistant polyurethane screens comprising following component: thermoplastic polyurethane, vinyl ester resin, melamine, carboxyl-terminated liguid nitrile rubber, haloflex, titanate coupling agent, filler.Sieve disclosed by the invention makes it have outstanding mechanical property, higher tensile strength by material blending and modifying, excellent tear resistance, good elasticity and resilience, uniformly, stablize, sieve can be made to be able to maintain performance in being used for multiple times to stablize, not putty, it is heat-resist, it is corrosion-resistant, and ageing-resistant performance is more excellent, the bearing capacity of sieve, corrosion-resistant, impact resistance and damping performance are prominent, and wear-resisting ageing-resistant, can be applied to the application fields such as ore screening and chemical filtration.
Description
Technical field
The present invention relates to screen technology fields, and in particular to a kind of noise reduction corrosion-and high-temp-resistant polyurethane screen.
Background technique
Screening system equipment mainly includes vibrating screen, spiral classifier, charging sealing-tape machine etc..Wherein vibrating screen noise compares
Prominent, the noise figure of screening system is greater than 100dB.Vibrating screen is all made of polyurethane screen instead of original gold in production technology
Belong to sieve, and damping is increased using abrasive rubber liner.Noise has certain reduction.Following noise control is additionally taken to arrange
It applies.Sand-gravel material is made of plurality of devices.Noise source system more sound sources consider resistance of the massif to noise when arrangement as far as possible
Every.Using landform by strong noise equipment be arranged in the lower location acoustic hood of topography for the noises such as vibrating screen equipment outstanding come
Setting.But noise reduction effect is not obvious.
Sieve is screened for and the industrial fabric of filtering.It is raw material by silk, wire or synthetic fibers, using reeled yarn
Tissue, plain weave, basket weave etc. are made into.Mesh with certain specification passes through for being less than the particle in the hole.Sieve rule
Lattice indicate also have with the width means in each hole, China is with hole count table per cm often with the mesh number of unit length (hole count)
Show.For flour milling industry, paint industry, paper industry, printing and dyeing industry and ore dressing industry etc..The sieve of flour milling industry is mostly with non-gold
Belong to material to weave, mesh is fine and closely woven.Sieve specification often indicates also have with the width in each hole with the mesh number of unit length (hole count)
What degree indicated.The national standard in China is indicated with mesh number per cm.
Synthetic fibers sieve has the characteristics that rustless, can replace part metals sieve.The more excellent poly- ammonia of performance
Ester sieve, high temperature resistance is poor, easy xanthochromia, and durability degree is poor.Those skilled in the art should develop excellent combination property, function
More sieves.
Summary of the invention
The purpose of the present invention is being directed to existing problem, provide and a kind of noise reduction corrosion-and high-temp-resistant polyurethane screen.
The invention is realized by the following technical scheme:
A kind of noise reduction corrosion-and high-temp-resistant polyurethane screen, is made of the raw material of following parts by weight:
85 ~ 105 parts of thermoplastic polyurethane, 21 ~ 33 parts of vinyl ester resin, 0.3 ~ 1.4 part of melamine, terpene resin 0.5 ~
2.3 parts, 9.1 ~ 17.5 parts of carboxyl-terminated liguid nitrile rubber, 8.1 ~ 13.5 parts of haloflex, titanate coupling agent 0.5 ~ 1.2
Part, 13 ~ 34 parts of filler.
A kind of noise reduction corrosion-and high-temp-resistant polyurethane screen, comprising the following steps: (1) each raw material is weighed, by filler through dry
It is dry, grind, be stirred, be added titanate coupling agent coupled surfaces processing after, it is spare to obtain mixture A；(2) by thermoplastic poly ammonia
After ester, melamine, carboxyl-terminated liguid nitrile rubber, haloflex, vinyl ester resin are uniformly mixed, mixing is added
Object A puts into extruder feeding cylinder after mixing evenly；(3) mixture of step (2) is granulated by extruder extrusion molding, is squeezed out
Granulation process parameters are as follows: one area of extrusion temperature: 160-180 DEG C, 2nd area: 165-185 DEG C DEG C, 3rd area: 175-185 DEG C DEG C, 4th area:
180-190 DEG C, 5th area: 190-195 DEG C, 6th area: 190-200 DEG C of extrusion revolving speed 40-150r/min；(4) sieve forms: by mold
Formpiston be mounted on the moving template of moulding press, former is mounted on the fixed form of moulding press, and makes mold formpiston, at former
In opening state, formpiston, former and forming screens contact surface are sprayed with dimethyl siloxane, by pellet be packed into transfer modling at
After being dried in type machine drying box, after being automatically loaded in fuselage heating fusing by Transfer molding machine, transfer modling at
Under the transmitting of type machine and external heating device effect, high temperature and pressure melt is poured into oral instructions from multiple by the program and molding capacity of setting
It is progressive enter mold sprue, enter die cavity through branch flow passage, 260 DEG C -300 DEG C of molding temperature, molding pressure 10-35MPa, high temperature melting
After body is full of die cavity, pressure maintaining continues 1-2 minutes, sieve automatic demoulding cooling program, and molding machine nozzle exits, sieve is taken out, this
Stage continues 1-2 minutes, the forming process of entire sieve continue 2-6 minutes time to get.
Further, the vinyl ester resin is with the performed polymer of the NCO TPU blocked and isocyanate-monomer chemistry
The vinyl ester resin of toughening modifying, specially vinyl ester resin pendant hydroxyl group be grafted using base polyurethane prepolymer for use as anti-
It answers, the isocyanate-monomer is one of TDI, MDI, TMDI, TMXDI, TMI, HTDI or a variety of, point of the performed polymer
Son amount is 9000 ~ 10000.
Further, the acrylonitrile content of the carboxyl-terminated liguid nitrile rubber be 12 ~ 28%, molecular weight be 6000 ~
10000。
Further, the haloflex is the haloflex that chlorinity is 30 ~ 40%.
Further, the filler is made of following poidometer equivalent number raw material: 0.7 ~ 2.3 part of magnesium silicate, sintering porcelain
0.6 ~ 3.1 part of powder, 0.5 ~ 2.7 part of cement powder, 0.6 ~ 3.1 part of blanc fixe, 0.7 ~ 4.1 part of kaolinite mountain flour, wollastonite in powder 1.1 ~
2.5 parts, 0.5 ~ 2.7 part of snake mountain flour, 0.4 ~ 1.7 part of flyash.
Beneficial effects of the present invention:
Various fillers can not only reduce cost, may replace a certain number of matrix resins, and cost is greatly lowered, and
Reinforcing effect is played, the active surface of mineral grain can be combined with resin macromolecule, cross-linked structure be formed, to increase plastics
Mechanical strength, adjust the rheological characteristic of plastics, keep processing performance more preferable, the infiltration that can reduce sieve sexually revises chemical activity, mentions
Water resistance and corrosion resistance of high polyurethane screen etc. improve the hot property for improving sieve, improve the thermal distoftion of plastics, reduce sieve
The specific heat capacity of material is netted, thermal conductivity is improved, improves plastic flame performance, the electrical property of sieve is improved but the resistance to electric arc of plastics can be improved
Property, antistatic property is improved, the dust explosion risk coefficient caused by ore production field is reduced.The filler price of multiplicity is low
Honest and clean, from a wealth of sources, nontoxic nonirritant, odorlessness does not occur chemical reaction with matrix or additive and generates harmful substance, is easy to
It moistens, dispersion, moderate viscosity, rheological characteristic is good, stability is good, is conducive to the performance of sieve plastics.The addition of melamine is advantageous
In the formation of interpenetrating network system, enhance the mechanical property of sieve.
Polyurethane screen disclosed by the invention is widely used in the industrial departments such as metallurgy, coal, chemical industry, building, grain
Vibrating screen makees the classification of bulk material, which takes the direct networking of molding, high production efficiency by sieving in length and breadth, and efficient quick avoids
The inhomogenous defect of mechanical strength caused by hot weld forms, and the shortcomings that overcome virgin metal net, have it is light-weight, not plug-hole,
Percent opening height, long service life, low noise, it is convenient to install and maintain the advantages that.
In the production process, the technological difficulties mainly solved have sieve net: base resin material selects thermoplastic polyurethane
Polyurethane, carboxyl-terminated liguid nitrile rubber, vinyl ester resin, haloflex carry out blending and modifying, polyurethane and vinyl
Ester resin forms interpenetrating polymer networks structure, and mechanical property significantly improves, heat resistance and it is corrosion-resistant further increase, vinyl
Ester resin, carboxyl-terminated liguid nitrile rubber, haloflex significantly enhance the oil resistant of sieve, corrosion resistance, in chemical industry, build
Build, coal field has good application performance, and cost is further decreased because cost of material is cheap.Moreover, haloflex,
Carboxyl end group liquid butyronitrile rubber, the solubility parameters of glue thermoplastic polyurethane polyurethane are close, and compatibility is good, and processing performance is excellent,
Side improves the color inhibition ability of thermoplastic polyurethane, indirectly extends its service life；(2) sieve one-step shaping, at
Type simple process, product properties is uniform, wear resistant corrosion resistant, has multiple functions, and do not increase cost.
The present invention has the advantage that compared with prior art
Wear resistant corrosion resistant weather-resistant pu sieve disclosed by the invention realizes no blocking, high opening rate, high wear-out life, than
The polishing machine of metallic sieve is superior, and special sieve pore structure and manufacturing process had both maintained higher percent opening, and were able to maintain
Secondly good service life will not block sieve, furthermore it has mould pressing process to be made, and performance is uniform, and compass screen surface is by many independences
Unit composition, local abrasion not will lead to the destruction of entire compass screen surface.The outstanding advantages having are: bending resistance is in the wrong, flexible, wear-resisting
Damage, noise are low；Sieve pore is not easy to plug;Sieve installation and replacement are convenient, long service life；Fire line is preferable, is nearby welded
Operation welding slag falls on sieve, will not vigorous combustion.The toughness of sieve and the rigidity of stainless steel mesh and anti-flammable are had both.No
Easy plug-hole.
Thermoplastic polyurethane bullet screen surface is wear-resisting, light-weight, peace method is simple, low noise；Cold resistance is prominent., thermoplastic
The glass transformation temperature specific force of property polyurethane elastomer is low, due to these characteristics；It can consolidate long using the time.Various beauty can be made into
Beautiful color, thermoplastic polyurethane elastomer sieve have good physical property, still link at subzero 35 degree it is good it is elastic,
Flexibility and other physical properties；Wear-resisting anti-corruption, acid and alkali-resistance greasy dirt, water-fast, antimildew and antibacterial, ageing-resistant oxidation.
Thermoplastic polyurethane elastomer sieve has superior physical property, has had both the toughness and rigidity of sieve, it is ensured that
The dimensionally stable of sieve screen slot in use, to greatest extent ensure that the stability of the granularity under sieve；It is not easy plug-hole；Together
When due to use advanced precision die manufacturing technology, it is ensured that high percent opening also ensure that limit to the maximum extent
High screening efficiency.Sieve appearance is beautiful, can be made into various chromatic colours；Light-weight, mounting means is simple, low noise, significantly
Reduce labor intensity and improves working environment.
Specific embodiment
Illustrate the present invention with specific embodiment below, but is not limitation of the present invention.
Embodiment 1
A kind of noise reduction corrosion-and high-temp-resistant polyurethane screen, is made of the raw material of following parts by weight:
98 parts of thermoplastic polyurethane, 25 parts of vinyl ester resin, 1.8 parts of melamine, 1.2 parts of terpene resin, carboxyl end group liquid
10 parts of nitrile rubber, 10 parts of haloflex, 0.8 part of titanate coupling agent, 20 parts of filler.
A kind of noise reduction corrosion-and high-temp-resistant polyurethane screen, comprising the following steps: (1) weigh each raw material, by magnesium silicate, burn
Tie porcelain powder, cement powder, blanc fixe, kaolinite mountain flour, wollastonite in powder, melamine, flyash, snake mountain flour through drying, grinding,
After being stirred, the processing of titanate coupling agent coupled surfaces being added, it is spare to obtain mixture A；(2) by thermoplastic polyurethane, end carboxylic
After base liquid nitrile rubber, haloflex, vinyl ester resin are uniformly mixed, mixture A is added, after mixing evenly,
Put into extruder feeding cylinder；(3) mixture of step (2) is granulated by extruder extrusion molding, extruding and pelletizing process parameter are as follows:
One area of extrusion temperature: 160-180 DEG C, 2nd area: 165-185 DEG C DEG C, 3rd area: 175-185 DEG C DEG C, 4th area: 180-190 DEG C, 5th area:
190-195 DEG C, 6th area: 190-200 DEG C of extrusion revolving speed 40-150r/min；(4) sieve forms: the formpiston of mold is mounted on mould
On the moving template of press, former is mounted on the fixed form of moulding press, and keeps mold formpiston, former in the open state, right
Formpiston, former and forming screens contact surface are sprayed with dimethyl siloxane, and pellet is packed into Transfer molding machine drying box
After being dried, after being automatically loaded in fuselage heating fusing by Transfer molding machine, Transfer molding machine transmitting and
Under external heating device effect, high temperature and pressure melt is passed into mold master from multiple cast gates by the program and molding capacity of setting
Runner enters die cavity through branch flow passage, and 260 DEG C -300 DEG C of molding temperature, molding pressure 10-35MPa, high-temperature fusant is full of die cavity
Afterwards, pressure maintaining continues 1-2 minutes, sieve automatic demoulding cooling program, and molding machine nozzle exits, sieve is taken out, this stage continues 1-
2 minutes, the forming process of entire sieve continue 2-6 minutes time to get.
Further, the vinyl ester resin is with the performed polymer of the NCO TPU blocked and isocyanate-monomer chemistry
The vinyl ester resin of toughening modifying, specially vinyl ester resin pendant hydroxyl group be grafted using base polyurethane prepolymer for use as anti-
It answers, the isocyanate-monomer is one of TDI, MDI, TMDI, TMXDI, TMI, HTDI or a variety of, point of the performed polymer
Son amount is 9000 ~ 10000.
Further, the acrylonitrile content of the carboxyl-terminated liguid nitrile rubber is 20%, and molecular weight is 6000 ~ 10000.
Further, the haloflex is the haloflex that chlorinity is 35%.
Further, the filler is made of following poidometer equivalent number raw material: 1.8 parts of magnesium silicate, sintering porcelain powder 1.9
Part, 1.8 parts of cement powder, 2.4 parts of blanc fixe, 2.4 parts of kaolinite mountain flour, 1.9 parts of wollastonite in powder, 1.5 parts of snake mountain flour, flyash
1.0 part.
Embodiment 2
A kind of noise reduction corrosion-and high-temp-resistant polyurethane screen, is made of the raw material of following parts by weight:
98 parts of thermoplastic polyurethane, 32 parts of vinyl ester resin, 1.3 parts of melamine, 1 part of terpene resin, carboxyl end group liquid fourth
13 parts of nitrile rubber, 12 parts of haloflex, 0.7 part of titanate coupling agent, 20 parts of filler.
A kind of noise reduction corrosion-and high-temp-resistant polyurethane screen, comprising the following steps: (1) each raw material is weighed, by filler through dry
It is dry, grind, be stirred, be added titanate coupling agent coupled surfaces processing after, it is spare to obtain mixture A；(2) by thermoplastic poly ammonia
After ester, melamine, carboxyl-terminated liguid nitrile rubber, haloflex, vinyl ester resin are uniformly mixed, mixing is added
Object A puts into extruder feeding cylinder after mixing evenly；(3) mixture of step (2) is granulated by extruder extrusion molding, is squeezed out
Granulation process parameters are as follows: one area of extrusion temperature: 160-180 DEG C, 2nd area: 165-185 DEG C DEG C, 3rd area: 175-185 DEG C DEG C, 4th area:
180-190 DEG C, 5th area: 190-195 DEG C, 6th area: 190-200 DEG C of extrusion revolving speed 40-150r/min；(4) sieve forms: by mold
Formpiston be mounted on the moving template of moulding press, former is mounted on the fixed form of moulding press, and makes mold formpiston, at former
In opening state, formpiston, former and forming screens contact surface are sprayed with dimethyl siloxane, by pellet be packed into transfer modling at
After being dried in type machine drying box, after being automatically loaded in fuselage heating fusing by Transfer molding machine, transfer modling at
Under the transmitting of type machine and external heating device effect, high temperature and pressure melt is poured into oral instructions from multiple by the program and molding capacity of setting
It is progressive enter mold sprue, enter die cavity through branch flow passage, 260 DEG C -300 DEG C of molding temperature, molding pressure 30MPa, high-temperature fusant
After die cavity, pressure maintaining continues 2 minutes, sieve automatic demoulding cooling program, and molding machine nozzle exits, take out sieve, this stage
Continue 1-2 minutes, the forming process of entire sieve continue 6 minutes time to get.
Further, the vinyl ester resin is with the performed polymer of the NCO TPU blocked and isocyanate-monomer chemistry
The vinyl ester resin of toughening modifying, specially vinyl ester resin pendant hydroxyl group be grafted using base polyurethane prepolymer for use as anti-
It answers, the isocyanate-monomer is one of TDI, MDI, TMDI, TMXDI, TMI, HTDI or a variety of, point of the performed polymer
Son amount is 9000 ~ 10000.
Further, the acrylonitrile content of the carboxyl-terminated liguid nitrile rubber be 12 ~ 28%, molecular weight be 6000 ~
10000。
Further, the haloflex is the haloflex that chlorinity is 40%.
Further, the filler is made of following poidometer equivalent number raw material: 2.2 parts of magnesium silicate, sintering porcelain powder 2.8
Part, 2.5 parts of cement powder, 2.4 parts of blanc fixe, 2.3 parts of kaolinite mountain flour, 2.2 parts of wollastonite in powder, 2.5 parts of snake mountain flour, flyash
1.4 part.
Comparative example 1
This comparative example compared with Example 2, weighs in step in raw material, saves vinyl ester resin ingredient, method in addition to this
Step is all the same.
Comparative example 2
This comparative example compared with Example 2, weighs in step in raw material, saves tripolycyanamide, method and step in addition to this
It is all the same.
Comparative example 3
This comparative example compared with Example 2, weighs in step in raw material, saves carboxyl-terminated liguid nitrile rubber ingredient, in addition to this
Method and step it is all the same.
Comparative example 4
Conventional polyurethanes sieve in the market
The practical application effect of the sieve of 1 embodiment and comparative example of table compares
Result above is infused, using same equipment, use condition, the ratio of appearance corresponding stifled mine, sizing operating condition identical using the time
Example measures.
The physical property of the sieve of 2 embodiment and comparative example of table compares
The above test result is infused with reference to common technology standard such as Taber abrasion test: ASTM D4060 GB/T1040-2006, GB/
The traditional test methods such as T 1634-2004, noise reduction rate are under same environment and use condition, compared to conventional polyurethanes in the market
The sound decibel rate of descent of sieve.
Claims (6)
1. a kind of noise reduction corrosion-and high-temp-resistant polyurethane screen, which is characterized in that be made of the raw material of following parts by weight:
85 ~ 105 parts of thermoplastic polyurethane, 21 ~ 33 parts of vinyl ester resin, 0.3 ~ 1.4 part of melamine, terpene resin 0.5 ~
2.3 parts, 9.1 ~ 17.5 parts of carboxyl-terminated liguid nitrile rubber, 8.1 ~ 13.5 parts of haloflex, titanate coupling agent 0.5 ~ 1.2
Part, 13 ~ 34 parts of filler.
2. a kind of noise reduction corrosion-and high-temp-resistant polyurethane screen according to claim 1, which is characterized in that including following step
It is rapid: (1) weigh each raw material, by filler through drying, grind, be stirred, after the processing of titanate coupling agent coupled surfaces is added, obtain
Mixture A is spare；(2) by thermoplastic polyurethane, melamine, carboxyl-terminated liguid nitrile rubber, haloflex, vinyl esters
After mixing, mixture A is added in resin agitating, after mixing evenly, puts into extruder feeding cylinder；(3) by the mixing of step (2)
Material is granulated by extruder extrusion molding, extruding and pelletizing process parameter are as follows: one area of extrusion temperature: 160-180 DEG C, 2nd area: 165-185
DEG C DEG C, 3rd area: 175-185 DEG C DEG C, 4th area: 180-190 DEG C, 5th area: 190-195 DEG C, 6th area: 190-200 DEG C of extrusion revolving speed 40-
150r/min；(4) sieve forms: the formpiston of mold being mounted on the moving template of moulding press, former is mounted on consolidating for moulding press
On solid plate, and keep mold formpiston, former in the open state, formpiston, former and forming screens contact surface are sprayed with diformazan
Pellet is packed into after being dried in Transfer molding machine drying box, is automatically loaded by Transfer molding machine by radical siloxane
In fuselage after heating fusing, under the transmitting of Transfer molding machine and external heating device effect, by the program and mould of setting
High temperature and pressure melt is passed into mold sprue from multiple cast gates by pressure amount, enters die cavity, molding temperature 260 through branch flow passage
DEG C -300 DEG C, molding pressure 10-35MPa, after high-temperature fusant is full of die cavity, pressure maintaining continues 1-2 minutes, and sieve automatic demoulding cools down
Program, molding machine nozzle exit, sieve is taken out, this stage continues 1-2 minutes, and the forming process of entire sieve continues 2-6 minutes
Time to get.
3. a kind of noise reduction corrosion-and high-temp-resistant polyurethane screen according to claim 1, it is characterised in that: the vinyl
Ester resin is the vinyl ester resin modified with the performed polymer of the NCO TPU blocked and isocyanate-monomer chemical toughening, specifically
Be vinyl ester resin pendant hydroxyl group using base polyurethane prepolymer for use as carry out graft reaction, the isocyanate-monomer be TDI, MDI,
One of TMDI, TMXDI, TMI, HTDI or a variety of, the molecular weight of the performed polymer are 9000 ~ 10000.
4. a kind of noise reduction corrosion-and high-temp-resistant polyurethane screen according to claim 1, it is characterised in that: the carboxyl end group
The acrylonitrile content of liquid nitrile rubber is 12 ~ 28%, and molecular weight is 6000 ~ 10000.
5. a kind of noise reduction corrosion-and high-temp-resistant polyurethane screen according to claim 1, it is characterised in that: the chlorination is poly-
Ethylene is the haloflex that chlorinity is 30 ~ 40%.
6. a kind of noise reduction corrosion-and high-temp-resistant polyurethane screen according to claim 1, it is characterised in that: the filler by
Following poidometer equivalent number raw material composition: 0.7 ~ 2.3 part of magnesium silicate, 0.6 ~ 3.1 part of porcelain powder of sintering, 0.5 ~ 2.7 part of cement powder,
0.6 ~ 3.1 part of blanc fixe, 0.7 ~ 4.1 part of kaolinite mountain flour, 1.1 ~ 2.5 parts of wollastonite in powder, 0.5 ~ 2.7 part of snake mountain flour, fine coal
0.4 ~ 1.7 part of ash.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111732829A (en) * | 2020-06-05 | 2020-10-02 | 安徽省华瑞网业有限公司 | Preparation method of reaction injection molding interpenetrating network sweating wear-resistant screen |
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