CN108164981A - Polyurethane sieve plate and preparation method thereof - Google Patents
Polyurethane sieve plate and preparation method thereof Download PDFInfo
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- CN108164981A CN108164981A CN201711475314.7A CN201711475314A CN108164981A CN 108164981 A CN108164981 A CN 108164981A CN 201711475314 A CN201711475314 A CN 201711475314A CN 108164981 A CN108164981 A CN 108164981A
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- polyurethane
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses one kind to have high abrasion, high intensity, high rigidity, and it is light-weight, screening efficiency is high, not plug-hole, polyurethane sieve plate that anti-friction, shock resistance, tear-proof, noise is low, easy for installation, service life is long, large carrying capacity, comprehensive benefit are high and preparation method thereof, the polyurethane sieve plate is counted in parts by weight to be made of following raw material：100 parts of base polyurethane prepolymer for use as, 14~14.5 parts of MOCA, 5~8 parts of SILICA FUMEs, 2~5 parts of zinc oxide, 1~2 part of titanium dioxide.Raw material selected by the present invention is easy to get, preparation process is easy to operate, the polyurethane sieve plate wearability being prepared is strong, with good physical and chemical performance, its performance parameter disclosure satisfy that hardness (Shao Er A) is 90 ± 2 degree, tensile strength >=45MPa, elongation rate of tensile failure >=600% break permanent deformation≤20%, tearing strength (perpendicular type) >=35KN/m, Akron abrasion ＜ 0.05cm3/1.61km；And used online by the upper machine of 6 months, floor lever of sieve tray shape wear extent is only 6mm (skeleton is 15mm away from glue-line).
Description
Technical field
The present invention relates to technical field of polymer materials, especially a kind of polyurethane sieve plate and preparation method thereof.
Background technology
Polyurethane sieve plate be widely used in metallurgy, mine, ore dressing, coal, building materials, water conservancy, the industries such as build the road vibrating screen
It is the regeneration product of steel plate stamping screen mesh, braided steel wire net, stainless steel sieve and rubber sieve plate on extension set.With light-weight, sieve
Component efficiency is high, not plug-hole, anti-friction, shock resistance, tear-proof, noise is low, easy for installation, service life is long, large carrying capacity, comprehensive
The advantages that closing high efficiency.
Polyurethane sieve plate is framework material using steel wire rope, along with polyurethane material has very high springform in itself
Amount, high intensity absorb impact force, high abrasion, thus with very high tensile strength.Its bearing capacity is 2.5 times of Rubber screen
More than.Its service life improves 8~10 times compared with common metal sieve, is 3~4 times of stainless steel compass screen surface, is natural rubber
4~6 times, be the best compass screen surface material of wear-resisting property in the world at present.The production material category macromolecule of polyurethane sieve plate is organic
Elastomer has fabulous abrasion resistance, flexible resistance, large carrying capacity.The raw materials for production and steel wire rope of polyurethane sieve plate
Metallic frameworks is waited to have passed through specially treated, it is ensured that the never delamination under long-term alternate load effect.
Certain steel mill selects the sieve plate spare part of the upgrading linearly coupled screening machine of iron equipment for slag produced from steel-smelting, relies on for a long time
Import rubber sieve plate, procurement price is expensive, and the period is long.Since this is located in the middle part of screening machine for vibrating device, away from sieve plate installation position
Only 300mm high is put, replacement installation is extremely difficult, and labor intensity is big, and the service life of this kind of sieve plate is generally at 1.5 to 2 months
Between, it shuts down and replaces frequency height, low production efficiency causes production line overall economic efficiency low.
Invention content
The technical problems to be solved by the invention are：There is provided it is a kind of have high abrasion, high intensity, hardness it is high and light-weight,
Screening efficiency is high, not plug-hole, anti-friction, shock resistance, tear-proof, noise is low, easy for installation, service life is long, large carrying capacity,
The high polyurethane sieve plate of comprehensive benefit.
The technical solution adopted in the present invention is to solve above-mentioned technical problem：Polyurethane sieve plate, count in parts by weight by
Following raw material composition：100 parts of base polyurethane prepolymer for use as, 14~14.5 parts of MOCA, 5~8 parts of SILICA FUMEs, 2~5 parts of zinc oxide, 1~2 part
Titanium dioxide.
It is further：DMEP is further included in the raw material.
It is further：Purity >=95% of the zinc oxide.
It is further：The silicon powder is micro/nano level fused silica powder, and meso-position radius is 6~8 microns.
Second technical problem to be solved by this invention is prepared there is provided the preparation method of above-mentioned polyurethane sieve plate
Method includes the following steps：
A, by base polyurethane prepolymer for use as heating and melting, SILICA FUME, zinc oxide and titanium dioxide is then added in and is stirred to uniform,
It is spare after being de-gassed in subnormal ambient；By MOCA heating and meltings, keep the temperature spare；By above-mentioned raw materials through polyurethane casting machine meter
Amount pump is drawn, and high-speed stirred is uniformly mixed；
B, brushing polyurethane adhesive after sieve plate skeleton sandblasting is cleaned, brushing releasing agent after dies cavity is cleaned will
It is placed on heating platform after sieve plate skeleton and mold assembling；
C, it is heating and curing on heating platform after the material mixed in step a is poured into the mold after assembling；
D, the polyurethane sieve plate after being heating and curing cooled down, demoulded, then trim process obtains blank；
E, after cure baking processing is carried out to blank, obtains final products.
It is further：In the step a, first SILICA FUME, zinc oxide, titanium dioxide are mixed in high speed mixer is sealed
Uniformly, it adds in after DMEP is soaked into paste and is then added in base polyurethane prepolymer for use as.
It is further：In the step a, need to be filtered material using high mesh number filter screen before drawing material.
It is further：In the step a, whipping temp is 80~90 DEG C, and negative pressure is -0.5~-0.8MPa, during degassing
Between for 0.5~1h, the holding temperature of MOCA is 115~125 DEG C.
It is further：In the step c, the temperature that is heating and curing is 115~120 DEG C.
It is further：In the step e, after cure baking temperature is 110~115 DEG C, and baking time is 8~10h.
The beneficial effects of the invention are as follows：The raw material that the present invention is prepared selected by polyurethane sieve plate is easy to get, preparation process operation
Simply, it is strong by polyurethane sieve plate wearability obtained by selecting prepared by rational raw material and its proportional quantity, there is good object
Change performance, performance parameter disclosure satisfy that hardness (Shao Er A) is 90 ± 2 degree, tensile strength >=45MPa, elongation rate of tensile failure >=
600%, break permanent deformation≤20%, tearing strength (perpendicular type) >=35KN/m, Akron abrasion ＜ 0.05cm3/1.61km；
And used online by the upper machine of 6 months, floor lever of sieve tray shape wear extent is only 6mm (skeleton is 15mm away from glue-line).
Specific embodiment
For the ease of understanding the present invention, the present invention is further detailed with reference to embodiment.
Embodiment 1
100 parts of performed polymer PGJG88A heating and meltings are put into polyurethane casting machine A tanks (head tank)；By 5 parts of meltings
SILICA FUME, 2 parts of zinc oxide, 1.5 parts of titanium dioxides mix, and add in a little DMEP and mix well, and stirring also adds in after paste is made
Into casting machine A tanks, above-mentioned raw materials are uniformly mixed at 85 ± 2 DEG C, and standby in -0.8MPa negative pressure degasifications 0.5 hour
With.
14.4 parts of MOCA are added in, fusing is heated in casting machine B tanks, and maintained the temperature at spare.Casting machine is opened, makes two
The spare material of kind is drawn through polyurethane casting machine metering pump, until head high-speed stirred is uniformly mixed, temperature is maintained at 85 ± 2 DEG C,
It is poured into and is positioned in the assembled mold of heating platform upper skeleton, platform temperature is maintained at 120 ± 5 DEG C, heated baking
Product after demoulding at 110 ± 5 DEG C is carried out after cure baking processing 8 hours, can obtain most through deburring by 20min, rear demoulding
Finished product.
Obtained polyurethane sieve plate performance parameter is：90.7 degree of hardness (Shao Er A)；Tensile strength 48MPa；Pull apart elongation
Rate 673% breaks permanent deformation 10.4%, tearing strength (perpendicular type) 38.5KN/m, Akron abrasion 0.04cm3/1.61km.
Preferable in working condition and installation operation, service life was up to 8 months；Not met in operating mode extreme and installation will
In the case of asking, service life can also reach 5 months or more, this handicraft product lumber recovery is more than 97%, and qualification rate is more than 95%.
Embodiment 2
100 parts of performed polymer PGJG88A heating and meltings are put into polyurethane casting machine A tanks (head tank)；By 8 parts of meltings
SILICA FUME, 5 parts of zinc oxide, 2 parts of titanium dioxides mix, and add in a little DMEP and mix well, and stirring is also added to after paste is made
In casting machine A tanks, above-mentioned raw materials are uniformly mixed at 85 ± 2 DEG C, and spare in -0.8MPa negative pressure degasifications 0.5 hour.
14.2 parts of MOCA are added in, fusing is heated in casting machine B tanks, and maintained the temperature at spare.Casting machine is opened, makes two
The spare material of kind is drawn through polyurethane casting machine metering pump, until head high-speed stirred is uniformly mixed, temperature is maintained at 85 ± 2 DEG C,
It is poured into and is positioned in the assembled mold of heating platform upper skeleton, platform temperature is maintained at 120 ± 5 DEG C, heated baking
Product after demoulding at 110 ± 5 DEG C is carried out after cure baking processing 8 hours, can obtain most through deburring by 20min, rear demoulding
Finished product.
Obtained polyurethane sieve plate performance parameter is：94 degree of hardness (Shao Er A)；Tensile strength 52MPa；Elongation at break
650%, break permanent deformation 9.3%, tearing strength (perpendicular type) 41.2KN/m, Akron abrasion 0.02cm3/1.61km.
In the case of working condition and installation operation are preferable, service life was up to 11 months；Not met in operating mode extreme and installation will
In the case of asking, service life can also reach 6 months or more, this handicraft product lumber recovery is more than 97%, and qualification rate is big by 95%.
Polyurethane sieve plate obtained by the present invention has that high abrasion, high intensity, high rigidity, light-weight, screening efficiency is high, no
Plug-hole, anti-friction, shock resistance, tear-proof, noise is low, easy for installation, service life is long, large carrying capacity, comprehensive benefit height etc.
Advantage, service life are 3 times of conventional polyurethanes sieve plate, are 4 times of import rubber sieve plate, are 10 times of metal sieve plate.
Claims (10)
1. polyurethane sieve plate, it is characterised in that：Meter is made of following raw material in parts by weight：100 parts of base polyurethane prepolymer for use as 14~
14.5 parts of MOCA, 5~8 parts of SILICA FUMEs, 2~5 parts of zinc oxide, 1~2 part of titanium dioxide.
2. polyurethane sieve plate as described in claim 1, it is characterised in that：DMEP is further included in the raw material.
3. polyurethane sieve plate as claimed in claim 1 or 2, it is characterised in that：Purity >=95% of the zinc oxide.
4. polyurethane sieve plate as claimed in claim 3, it is characterised in that：The silicon powder is micro/nano level fused silica
Powder, meso-position radius are 6~8 microns.
5. prepare the method for polyurethane sieve plate as claimed in claim 4, it is characterised in that：Include the following steps：
A, by base polyurethane prepolymer for use as heating and melting, SILICA FUME, zinc oxide and titanium dioxide is then added in and is stirred to uniform, negative
It is de-gassed in pressure ring border rear spare；By MOCA heating and meltings, keep the temperature spare；By above-mentioned raw materials through polyurethane casting machine metering pump
It draws, high-speed stirred is uniformly mixed；
B, brushing polyurethane adhesive after sieve plate skeleton sandblasting is cleaned, brushing releasing agent after dies cavity is cleaned, by sieve plate
It is placed on heating platform after skeleton and mold assembling；
C, it is heating and curing on heating platform after the material mixed in step a is poured into the mold after assembling；
D, the polyurethane sieve plate after being heating and curing cooled down, demoulded, then trim process obtains blank；
E, after cure baking processing is carried out to blank, obtains final products.
6. the preparation method of polyurethane sieve plate as claimed in claim 5, it is characterised in that：In the step a, first by micro- silicon
Powder, zinc oxide, titanium dioxide are uniformly mixed in high speed mixer is sealed, and are added in after DMEP is soaked into paste and are then added to polyurethane
In performed polymer.
7. the preparation method of polyurethane sieve plate as claimed in claim 6, it is characterised in that：In the step a, before drawing material
Material need to be filtered using high mesh number filter screen.
8. the preparation method of polyurethane sieve plate as claimed in claim 6, it is characterised in that：In the step a, whipping temp is
80~90 DEG C, negative pressure is -0.5~-0.8MPa, and degassing time is 0.5~1h, and the holding temperature of MOCA is 115~125 DEG C.
9. the preparation method of polyurethane sieve plate as claimed in claim 6, it is characterised in that：In the step c, be heating and curing temperature
Spend is 115~120 DEG C.
10. the preparation method of polyurethane sieve plate as claimed in claim 6, it is characterised in that：In the step e, after cure is dried
Roasting temperature is 110~115 DEG C, and baking time is 8~10h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711475314.7A CN108164981A (en) | 2017-12-29 | 2017-12-29 | Polyurethane sieve plate and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711475314.7A CN108164981A (en) | 2017-12-29 | 2017-12-29 | Polyurethane sieve plate and preparation method thereof |
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| CN201711475314.7A Pending CN108164981A (en) | 2017-12-29 | 2017-12-29 | Polyurethane sieve plate and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109675782A (en) * | 2018-12-24 | 2019-04-26 | 南通金源智能技术有限公司 | The screening technique and device of cobalt alloy powder |
| CN112442203A (en) * | 2020-11-09 | 2021-03-05 | 安徽屹翔滤材有限公司 | Treatment process for improving easy-adhesion polyurethane sieve plate during feeding in rainy season of sintering plant |
| CN113680659A (en) * | 2021-07-22 | 2021-11-23 | 安徽昊华环保科技有限公司 | Production process method of wear-resistant high-strength polyurethane cast sieve plate |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166799A (en) * | 2010-12-21 | 2011-08-31 | 攀枝花钢城集团铁路设备修造有限公司 | Horizontal production process of polyurethane rubber roller |
| CN102248623A (en) * | 2011-05-09 | 2011-11-23 | 株洲时代新材料科技股份有限公司 | Polyurethane casting roller and manufacture method thereof |
| CN102285051A (en) * | 2011-06-21 | 2011-12-21 | 刘均平 | Process for manufacturing inner tube of pouring type polyurethane material conveying rubber tube |
| CN102719084A (en) * | 2012-06-28 | 2012-10-10 | 威海市海王旋流器有限公司 | Polyurethane elastomer for molds and manufacturing method of polyurethane elastomer |
| CN102786653A (en) * | 2012-08-24 | 2012-11-21 | 奥斯汀新材料（张家港）有限公司 | Preparation method of polyurethane sieve plate |
| CN103254387A (en) * | 2013-05-24 | 2013-08-21 | 淄博德信联邦化学工业有限公司 | High-abrasion-resistance polyurethane elastomer and preparation method thereof |
| CN105108948A (en) * | 2015-08-24 | 2015-12-02 | 安徽正和橡塑合金有限公司 | Production process for polyurethane sieve |
| CN106182830A (en) * | 2016-07-14 | 2016-12-07 | 洛阳诚创耐磨材料有限公司 | A kind of process for renewing of waste and old casting type polyurethane sieve plate |
-
2017
- 2017-12-29 CN CN201711475314.7A patent/CN108164981A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166799A (en) * | 2010-12-21 | 2011-08-31 | 攀枝花钢城集团铁路设备修造有限公司 | Horizontal production process of polyurethane rubber roller |
| CN102248623A (en) * | 2011-05-09 | 2011-11-23 | 株洲时代新材料科技股份有限公司 | Polyurethane casting roller and manufacture method thereof |
| CN102285051A (en) * | 2011-06-21 | 2011-12-21 | 刘均平 | Process for manufacturing inner tube of pouring type polyurethane material conveying rubber tube |
| CN102719084A (en) * | 2012-06-28 | 2012-10-10 | 威海市海王旋流器有限公司 | Polyurethane elastomer for molds and manufacturing method of polyurethane elastomer |
| CN102786653A (en) * | 2012-08-24 | 2012-11-21 | 奥斯汀新材料（张家港）有限公司 | Preparation method of polyurethane sieve plate |
| CN103254387A (en) * | 2013-05-24 | 2013-08-21 | 淄博德信联邦化学工业有限公司 | High-abrasion-resistance polyurethane elastomer and preparation method thereof |
| CN105108948A (en) * | 2015-08-24 | 2015-12-02 | 安徽正和橡塑合金有限公司 | Production process for polyurethane sieve |
| CN106182830A (en) * | 2016-07-14 | 2016-12-07 | 洛阳诚创耐磨材料有限公司 | A kind of process for renewing of waste and old casting type polyurethane sieve plate |
Non-Patent Citations (4)
| Title |
|---|
| 冯新德: "《高分子辞典》", 30 June 1998, 中国石化出版社 * |
| 刘益军: "《聚氨酯原料及助剂手册》", 31 January 2015, 化学工业出版社 * |
| 温辉梁: "《化工助剂》", 31 December 2009, 江西科学技术出版社 * |
| 谢刚，等: "《工业硅及硅铁生产》", 31 January 2016, 冶金工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109675782A (en) * | 2018-12-24 | 2019-04-26 | 南通金源智能技术有限公司 | The screening technique and device of cobalt alloy powder |
| CN112442203A (en) * | 2020-11-09 | 2021-03-05 | 安徽屹翔滤材有限公司 | Treatment process for improving easy-adhesion polyurethane sieve plate during feeding in rainy season of sintering plant |
| CN113680659A (en) * | 2021-07-22 | 2021-11-23 | 安徽昊华环保科技有限公司 | Production process method of wear-resistant high-strength polyurethane cast sieve plate |
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