CN110330746A - A kind of preparation method of the high-strength machinery sealing material of shearing resistance cut type - Google Patents
A kind of preparation method of the high-strength machinery sealing material of shearing resistance cut type Download PDFInfo
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- CN110330746A CN110330746A CN201910539815.XA CN201910539815A CN110330746A CN 110330746 A CN110330746 A CN 110330746A CN 201910539815 A CN201910539815 A CN 201910539815A CN 110330746 A CN110330746 A CN 110330746A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
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Abstract
The present invention relates to a kind of preparation methods of high-strength machinery sealing material of shearing resistance cut type, belong to mechanical material technical field.In the technical solution of the present invention, main material crystal whisker materials hydrotalcite of loaded type particle, due to being woven into the webbed three-dimensional structure of net form between composite material, increase specific surface area, it being capable of spring loaded body particle, increase the ratio of elastomer, therefore the high-temperature behavior of mixture can preferably be improved, whisker fibre makes to be dispersed in asphalt after mixture is added, play reinforcement humidification, the high-temperature behavior of asphalt can be improved to a certain extent, the load of hydrotalcite particles simultaneously, make hydrotalcite crystal fragmentation in the Mechanosensitive channels that friction process generates simultaneously, secondly it is combined between neatly stone veneer with weak Van der Waals force, fricting shearing acts on so that interlayer bonding is broken, so that the coefficient of friction of sample reduces, further improve the anti-shear performance of material.
Description
Technical field
The present invention relates to a kind of preparation methods of high-strength machinery sealing material of shearing resistance cut type, belong to mechanical material technology neck
Domain.
Background technique
In petroleum, chemical industry, machine-building and much industry, as the working media of pump is increasingly various, operating condition
It is increasingly harsh, when using mechanical seal, other than sealing structure and sealing system, it is necessary to weight should be subject to machinery sealing material
Depending on the performance of sealing material is to determine the primary factor of sealing reliability.
Thermoplastic polyurethane elastomer material has the spy that intensity is high, buckling is small, temperature tolerance and medium tolerance are good
Point is widely used in hydropneumatic field of sealing technology, is the ideal material for manufacturing hydropneumatic sealing element.Thermoplastic polyurethane material
Although excelling in abrasion resistance, frictional heat generation can accelerated material aging, shortening product service life, influence sealing effect.Cause
This, the coefficient of friction for reducing production hydraulic pneumatic sealing element Thermoplastic polyurethane elastomer material is very necessary.In order to reduce liquid
It calms the anger and employs the coefficient of friction of Thermoplastic polyurethane elastomer material, common method is added into polyurethane elastomer material
The inorganics anti-attrition lubricating auxiliary agent such as graphite, abrasion resistant carbon black, molybdenum disulfide, these inorganic anti-attrition lubricating auxiliary agents and thermoplastic poly
Urethane elastomer resin phase poor compatibility.It is largely taken off by the sealing element that above-mentioned material manufactures in use, will lead to anti-attrition layer
It falls, causes seal leakage and driving medium pollution.The processing method that thermoplastic polyurethane elastomer is added in inorganic anti-attrition auxiliary agent is logical
It is often double screw extruder, under twin-screw shear action, the performance of Thermoplastic polyurethane elastomer material declines, and influences product
The reliability of service life and product.
Publication number CN105001626A discloses " a kind of extrusion grade thermoplastic polyurethane elastomer and preparation method thereof ", packet
Include 30~45 parts of polyether Glycols, 50~70 parts of isocyanate mixture, 5~8.75 parts of chain extender, organosilicon-modified acrylic
5~10 parts and 0.1~0.5 part of catalyst of resin.Its there are the shortcomings that and with difference of the invention in summary of the invention below
In be discussed in detail.
Publication number CN106715503A discloses " self-lubricating polymer composition ", it includes diisocyanate with comprising short
The reactant of the diol mixture of chain dihydric alcohol, long-chain polyether or polyester-diol and lubricant, lubricant are non-silicone two
Alcohol, siloxane glycol or fluorinated lubricant mainly realize self-lubricating function, disadvantage by reactable lubricant therein
It is exactly that lubricant is added during the reaction greatly to destroy the secondary structure of polyurethane elastomer, physical property decline is tight
Weight, test result also surface this point, adds 5% PDMA, tensile strength drops to 2650psi from 5887psi.
Publication number CN102015897A is disclosed " thermoplastic polyurethane composite ", including thermoplastic polyurethane (TPU), one
Kind polysiloxanes, a kind of acetal polymer and a kind of acrylonitrile-butadiene-styrene (ABS) (ABS) copolymer.Machine machine is squeezed by screw rod
Tool is blended, under the Strong shear power effect of screw extruder, although realizing the reduction of coefficient of friction and abrasion, and, material
Performance degradation is serious, seriously restricts service performance.
Publication number CN101724253A discloses " a kind of thermoplastic polyurethane and its preparation method and application ", including thermoplastic
The blendings such as property polyurethane, ultra-high molecular weight polyethylene, surface lubricant, phase solvent and stabilizer obtain.Super high molecular weight is poly-
Ethylene and surface lubricant synergistic effect, the common reduction for realizing TPU coefficient of friction, but twin-screw mechanical blending can be great
Reduce the physical property of TPU material.
Three of the above invention represents the two ways for reducing TPU coefficient of friction and abrasion, is that chemical copolymerization is modified respectively
With physical mechanical blending and modifying, the two is really effective in the modification for reducing coefficient of friction and abrasion, but disadvantage is also very bright
Aobvious, chemical modification can destroy the regularity of secondary structure and strand, make reduced performance, physical mechanical blending and modifying is in Strong shear
Under power effect, strand is cut, performance decline.
Summary of the invention
The technical problems to be solved by the invention: for two kinds of sides for reducing TPU coefficient of friction and abrasion in the prior art
Formula can destroy the regularity of secondary structure and strand, make reduced performance, physical mechanical blending and modifying under the effect of Strong shear power,
The problem of strand is cut, and performance declines, provides a kind of preparation method of high-strength machinery sealing material of shearing resistance cut type.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) according to parts by weight, 45~50 parts of deionized waters, 10~15 parts of nickel nitrates, 3~5 parts of aluminum nitrates are weighed respectively to be placed in
In beaker, it is stirred and insulation reaction, adjusting pH to 10.0 is stirred simultaneously Crystallizing treatment, filters and collect filter cake, it is dry
Obtain matrix hydrotalcite particles；According to parts by weight, 45~50 parts of deionized waters, 10~15 parts of lauric acid and 6~8 parts are weighed respectively
Matrix hydrotalcite particles are placed in three-necked flask, are stirred simultaneously ultrasonic disperse, must be dispersed slurries and adjust pH to 6.0, keep the temperature
It is filtered after reaction, obtains filter residue, washing, drying obtain modified hydrotalcite particle；
(2) desulfurized gypsum is taken to be placed in ball mill, ball milling sieving collected screenings and was added to sulfuric acid for screenings is crossed
In, mixed serum is obtained, then copper chloride solution is added dropwise in mixed serum by 1:15 in mass ratio, after being added dropwise to complete, stirring is mixed
Merge insulation reaction and is aged, filters and collect filter cake after standing is cooled to room temperature, carrying out washing treatment, dry whisker modified fibre
Dimension；
(3) according to parts by weight, 45~50 parts of EVA particles, 10~15 parts of whisker modified fibers and 15~20 parts of water are weighed respectively
Talc particle is placed in open mill, and mill glue, the compression process in vulcanizing press are collected in mill processing, and standing is cooled to room temperature
Afterwards, it then vacuum freeze drying and is ground up, sieved, obtains modified elastomer particle；
(4) 1:10 in mass ratio again, modified elastomer particle is added in polyflon, is stirred and dries,
Collect dry mixed resin is placed in injection molding machine, injection process simultaneously demoulds and repairs overlap and burr, can be prepared into institute
The high-strength machinery sealing material of shearing resistance cut type stated.
The Crystallizing treatment temperature is 85~95.
The dispersion slurries pH is adjusted using 1% sodium hydroxide solution of 1% nitric acid of mass fraction and mass fraction.
The screenings of crossing is sieved using 100 μm of sieves.
The copper chloride solution drop rate is 2mL/min.
The mill processing is is 95~105 DEG C in open mill temperature, heat preservation mill processing.
The vulcanizing press compression process be at 85~100 DEG C, 1~2MPa in vulcanizing press compacting 5~
10min。
The carrying out washing treatment is successively to be washed 3~5 times respectively with deionized water and dehydrated alcohol.
It is 40mm that the injection process, which is in screw diameter, and injection pressure is 155~160MPa, and screw rod slewing rate is
Injection process under 55~60r/min.
The present invention is compared with other methods, and advantageous effects are:
(1) technical solution of the present invention uses polytetrafluoroethylene material for primary raw material, due to polytetrafluoroethylene (PTFE) high temperature performance, resistance to
Corrosion, non-stickiness and excellent insulation performance, but its dimensional stability and heating conduction are poor, creep is big, hardness is low, especially exist
It is easily-deformable under loaded effect and not thermally conductive, hardness is low, easy to wear, the modified scheme of tradition is the inorganic filler with high level
Or fiber such as glass fibre, graphite, molybdenum disulfide, carbon fiber etc. is filled modification, to improve its wear resistance, hardness and lead
Electrical conductivity energy, but these filler material partial sizes are generally large, and usually need higher loading, effectively improving composite wood
While expecting above-mentioned performance, mechanical property, self-lubrication and medium-resistance usually decline instead, especially common filling-modified
Compression recovery performance and creep resistant relaxation property negative effect to the sealing material of polytetrafluoroethylene material is bigger, this is also unfavorable poly-
The sealing performance of tetrafluoroethene material, so technical solution of the present invention uses crystal whisker materials hydrotalcite of loaded type particle, filling to bullet
Inside elastomer particles, firstly, the filling of elastomer particles, improves the associativity for directly improving organic material using inorganic filler
Can, by the addition of visco-elastic material, improves the bond strength between inorganic filler and material of main part, further improve material
Binding performance between inorganic filler, improves the structural strength of material, while improving the compression recovery performance of sealing material, simultaneously
The addition of composite material significantly improves the creep resistant relaxation ability of polytetrafluoroethylene (PTFE), and modified graphene is to polytetrafluoroethylene (PTFE) creep
The raising of relaxation ability is particularly evident, it is made to be effectively improved the mechanical strength of material and sealing performance；
(2) in the technical solution of the present invention, main material crystal whisker materials hydrotalcite of loaded type particle, due to interweaving between composite material
The webbed three-dimensional structure of networking shape, increases specific surface area, can spring loaded body particle, increase the ratio of elastomer, because
This can preferably improve the high-temperature behavior of mixture, compound crystal whisker materials to sealing mixed material have thickening, absorption, bridging, toughening,
The effects of resistance is split, whisker fibre make to be dispersed in asphalt after mixture is added, and form tridimensional network, play
Reinforcement humidification can improve the high-temperature behavior of asphalt, while the load of hydrotalcite particles, together to a certain extent
When in the Mechanosensitive channels that friction process generates make hydrotalcite crystal fragmentation, secondly with weak model moral between neatly stone veneer
Hua Li is combined, and fricting shearing acts on so that interlayer bonding is broken, these mechanochemical treatment processes can consume fricting shearing
Power and frrction load further improve the anti-shear performance of material so that the coefficient of friction of sample reduces.
Specific embodiment
According to parts by weight, 45~50 parts of deionized waters, 10~15 parts of nickel nitrates, 3~5 parts of aluminum nitrates are weighed respectively to be placed in
It in beaker, is stirred and is placed in 2~3h of insulation reaction at 65~75 DEG C, adjust pH with 5% sodium hydroxide solution of mass fraction
To 10.0, it is stirred and is placed in Crystallizing treatment 20 at 85~95 DEG C~for 24 hours, filter and collect filter cake, then at 65~75 DEG C
Dry 10~12h, obtains matrix hydrotalcite particles；According to parts by weight, 45~50 parts of deionized waters, 10~15 parts months are weighed respectively
Cinnamic acid and 6~8 parts of matrix hydrotalcite particles are placed in three-necked flask, be stirred and 200~300W ultrasonic disperse 10~
15min must disperse slurries and adjust pH to 6.0 with 1% nitric acid of mass fraction and 1% sodium hydroxide solution of mass fraction respectively,
Again at 75~80 DEG C after 6~8h of insulation reaction, filtering, after obtaining filter residue and being rinsed with deionized water to cleaning solution and be in neutrality, very
Vacuum freecing-dry obtains modified hydrotalcite particle；It takes desulfurized gypsum to be placed in ball mill, presses 250~300r/min at room temperature
After 2~3h of ball milling, 100 μm of sieves are crossed, collected screenings and are added to screenings is crossed in 1% sulfuric acid of mass fraction, are configured
1% copper chloride solution of mass fraction is added dropwise to mixed serum by the mixed serum for being 2% at slurry concentration, then 1:15 in mass ratio
In, control drop rate be 2mL/min, after being added dropwise to complete, be stirred be placed in insulation reaction 25 at 55~65 DEG C~
30min after standing is cooled to room temperature, is aged 6~8h, filters and collect filter cake, distinguished successively with deionized water and dehydrated alcohol
After washing 3~5 times, vacuum freeze drying obtains whisker modified fiber；According to parts by weight, respectively weigh 45~50 parts of EVA particles,
10~15 parts of whisker modified fibers and 15~20 parts of hydrotalcite particles are placed in open mill, and mill handles and controls open mill temperature
Be 95~105 DEG C, keep the temperature mill and collect under mill glue, with 85~100 DEG C, 1~2MPa compacting 5 in vulcanizing press~
10min, after standing is cooled to room temperature, then vacuum freeze drying and ground 500 mesh, obtain modified elastomer particle；Matter is pressed again
Modified elastomer particle is added in polyflon by amount than 1:10, is stirred to be placed at 100~110 DEG C and be done
Dry 3~5h, collect dry mixed resin is placed in injection molding machine, control screw diameter be 40mm, injection pressure be 155~
160MPa, screw rod slewing rate are that 55~60r/min demoulds and repair overlap and burr after the completion of being molded, and can be prepared into
The high-strength machinery sealing material of shearing resistance cut type.
Embodiment 1
According to parts by weight, 45 parts of deionized waters, 10 parts of nickel nitrates, 3 parts of aluminum nitrates are weighed respectively to be placed in a beaker, be stirred
It is placed in insulation reaction 2h at 65 DEG C, pH to 10.0 is adjusted with 5% sodium hydroxide solution of mass fraction, is stirred and is placed in 85
Crystallizing treatment 20h at DEG C filters and collects filter cake, then the dry 10h at 65 DEG C, obtains matrix hydrotalcite particles；In parts by weight
Meter weighs 45 parts of deionized waters, 10 parts of lauric acid and 6 parts of matrix hydrotalcite particles respectively and is placed in three-necked flask, is stirred
And in 200W ultrasonic disperse 10min, slurries must be dispersed and respectively with 1% sodium hydroxide of 1% nitric acid of mass fraction and mass fraction
Solution adjusts pH to 6.0, then at 75 DEG C after insulation reaction 6h, filtering obtains filter residue and rinsed with deionized water to cleaning solution and is in
After neutrality, vacuum freeze drying obtains modified hydrotalcite particle；It takes desulfurized gypsum to be placed in ball mill, presses 250r/ at room temperature
After min ball milling 2h, 100 μm of sieves are crossed, collected screenings and are added to screenings is crossed in 1% sulfuric acid of mass fraction, are configured
1% copper chloride solution of mass fraction is added dropwise to mixed serum by the mixed serum for being 2% at slurry concentration, then 1:15 in mass ratio
In, control drop rate is that 2mL/min is stirred after being added dropwise to complete and is placed in insulation reaction 25min at 55 DEG C, is stood
After being cooled to room temperature, it is aged 6h, filters and collect filter cake, after successively being washed 3 times respectively with deionized water and dehydrated alcohol, vacuum
It is freeze-dried to obtain whisker modified fiber；According to parts by weight, 45 parts of EVA particles, 10 parts of whisker modified fibers and 15 are weighed respectively
Part hydrotalcite particles are placed in open mill, and it is 95 DEG C that mill, which handles and controls open mill temperature, are kept the temperature mill and are simultaneously collected mill glue,
With suppress 5min under 85 DEG C, 1MPa in vulcanizing press, after standing is cooled to room temperature, then vacuum freeze drying and ground 500
Mesh obtains modified elastomer particle；Modified elastomer particle is added in polyflon by 1:10 in mass ratio again,
Be stirred and be placed at 100 DEG C dry 3h, collect dry mixed resin is placed in injection molding machine, control screw diameter is
40mm, injection pressure 155MPa, screw rod slewing rate are that 55r/min is demoulded after the completion of being molded and repaired overlap and hair
Thorn can be prepared into the high-strength machinery sealing material of shearing resistance cut type.
Embodiment 2
According to parts by weight, 47 parts of deionized waters, 13 parts of nickel nitrates, 4 parts of aluminum nitrates are weighed respectively to be placed in a beaker, be stirred
It is placed in insulation reaction 2.5h at 70 DEG C, pH to 10.0 is adjusted with 5% sodium hydroxide solution of mass fraction, is stirred and is placed in
Crystallizing treatment 22h at 90 DEG C filters and collects filter cake, then the dry 11h at 70 DEG C, obtains matrix hydrotalcite particles；By weight
Number meter weighs 47 parts of deionized waters, 13 parts of lauric acid and 7 parts of matrix hydrotalcite particles respectively and is placed in three-necked flask, and stirring is mixed
Merge in 250W ultrasonic disperse 13min, slurries must be dispersed and respectively with 1% hydroxide of 1% nitric acid of mass fraction and mass fraction
Sodium solution adjusts pH to 6.0, then at 77 DEG C after insulation reaction 7h, and filtering obtains filter residue and rinsed with deionized water to cleaning solution
After being in neutrality, vacuum freeze drying obtains modified hydrotalcite particle；It takes desulfurized gypsum to be placed in ball mill, presses at room temperature
After 275r/min ball milling 2.5h, 100 μm of sieves are crossed, collected screenings and are added to 1% sulfuric acid of mass fraction for screenings is crossed
In, it is configured to the mixed serum that slurry concentration is 2%, then 1% copper chloride solution of mass fraction is added dropwise to by 1:15 in mass ratio
In mixed serum, control drop rate is that 2mL/min is stirred after being added dropwise to complete and is placed in insulation reaction at 60 DEG C
27min after standing is cooled to room temperature, is aged 7h, filters and collect filter cake, successively washed respectively with deionized water and dehydrated alcohol
After 4 times, vacuum freeze drying obtains whisker modified fiber；According to parts by weight, 47 parts of EVA particles are weighed respectively, 13 parts of whiskers change
Property fiber and 17 parts of hydrotalcite particles be placed in open mill, mill handle and control open mill temperature be 100 DEG C, heat preservation mill simultaneously
It collects and suppresses 7min under mill glue, with 92 DEG C, 1.5MPa in vulcanizing press, after standing is cooled to room temperature, then vacuum refrigeration is dry
Dry and ground 500 mesh, obtains modified elastomer particle；Modified elastomer particle is added to poly- four by 1:10 in mass ratio again
In fluoroethylene resin, be stirred and be placed at 105 DEG C dry 4h, collect dry mixed resin is placed in injection molding machine, control
Screw diameter processed is 40mm, and injection pressure 157MPa, screw rod slewing rate is that 57r/min is demoulded and repaired after the completion of being molded
Overlap and burr are managed, the high-strength machinery sealing material of shearing resistance cut type can be prepared into.
Embodiment 3
According to parts by weight, 50 parts of deionized waters, 15 parts of nickel nitrates, 5 parts of aluminum nitrates are weighed respectively to be placed in a beaker, be stirred
It is placed in insulation reaction 3h at 75 DEG C, pH to 10.0 is adjusted with 5% sodium hydroxide solution of mass fraction, is stirred and is placed in 95
Crystallizing treatment for 24 hours, filters and collects filter cake at DEG C, then the dry 12h at 75 DEG C, obtains matrix hydrotalcite particles；In parts by weight
Meter weighs 50 parts of deionized waters, 15 parts of lauric acid and 8 parts of matrix hydrotalcite particles respectively and is placed in three-necked flask, is stirred
And in 300W ultrasonic disperse 15min, slurries must be dispersed and respectively with 1% sodium hydroxide of 1% nitric acid of mass fraction and mass fraction
Solution adjusts pH to 6.0, then at 80 DEG C after insulation reaction 8h, filtering obtains filter residue and rinsed with deionized water to cleaning solution and is in
After neutrality, vacuum freeze drying obtains modified hydrotalcite particle；It takes desulfurized gypsum to be placed in ball mill, presses 300r/ at room temperature
After min ball milling 3h, 100 μm of sieves are crossed, collected screenings and are added to screenings is crossed in 1% sulfuric acid of mass fraction, are configured
1% copper chloride solution of mass fraction is added dropwise to mixed serum by the mixed serum for being 2% at slurry concentration, then 1:15 in mass ratio
In, control drop rate is that 2mL/min is stirred after being added dropwise to complete and is placed in insulation reaction 30min at 65 DEG C, is stood
After being cooled to room temperature, it is aged 8h, filters and collect filter cake, after successively being washed 5 times respectively with deionized water and dehydrated alcohol, vacuum
It is freeze-dried to obtain whisker modified fiber；According to parts by weight, 50 parts of EVA particles, 15 parts of whisker modified fibers and 20 are weighed respectively
Part hydrotalcite particles are placed in open mill, and it is 105 DEG C that mill, which handles and controls open mill temperature, are kept the temperature mill and are simultaneously collected mill
It suppresses 10min under glue, with 100 DEG C, 2MPa in vulcanizing press, after standing is cooled to room temperature, then vacuum freeze drying and grinds
500 meshes are crossed, modified elastomer particle is obtained；Modified elastomer particle is added to polytetrafluoroethylene (PTFE) tree by 1:10 in mass ratio again
In rouge, be stirred and be placed at 110 DEG C dry 5h, collect dry mixed resin is placed in injection molding machine, control screw rod is straight
Diameter is 40mm, injection pressure 160MPa, and screw rod slewing rate is 60r/min, after the completion of being molded, demould and repair overlap and
Burr can be prepared into the high-strength machinery sealing material of shearing resistance cut type.
Reference examples: the machinery sealing material after chemical modification
The machinery sealing material that embodiment and reference examples are prepared, heated-air drying 16 hours at 80 DEG C.In 190~210
Machine-shaping is molded at DEG C, 100 DEG C post-process 16 hours, in vacuum oven, place 7 days, are then tested at room temperature.Tool
Body test result such as table 1.
1 performance characterization contrast table of table
As shown in Table 1, the high-strength machinery sealing material of shearing resistance cut type prepared by the present invention, excellent in mechanical performance, coefficient of friction is low, cuts
It cuts and has excellent performance.
Claims (9)
1. a kind of preparation method of the high-strength machinery sealing material of shearing resistance cut type, it is characterised in that specific preparation step are as follows:
(1) according to parts by weight, 45~50 parts of deionized waters, 10~15 parts of nickel nitrates, 3~5 parts of aluminum nitrates are weighed respectively to be placed in
In beaker, it is stirred and insulation reaction, adjusting pH to 10.0 is stirred simultaneously Crystallizing treatment, filters and collect filter cake, it is dry
Obtain matrix hydrotalcite particles；According to parts by weight, 45~50 parts of deionized waters, 10~15 parts of lauric acid and 6~8 parts are weighed respectively
Matrix hydrotalcite particles are placed in three-necked flask, are stirred simultaneously ultrasonic disperse, must be dispersed slurries and adjust pH to 6.0, keep the temperature
It is filtered after reaction, obtains filter residue, washing, drying obtain modified hydrotalcite particle；
(2) desulfurized gypsum is taken to be placed in ball mill, ball milling sieving collected screenings and was added to sulfuric acid for screenings is crossed
In, mixed serum is obtained, then copper chloride solution is added dropwise in mixed serum by 1:15 in mass ratio, after being added dropwise to complete, stirring is mixed
Merge insulation reaction and is aged, filters and collect filter cake after standing is cooled to room temperature, carrying out washing treatment, dry whisker modified fibre
Dimension；
(3) according to parts by weight, 45~50 parts of EVA particles, 10~15 parts of whisker modified fibers and 15~20 parts of water are weighed respectively
Talc particle is placed in open mill, and mill glue, the compression process in vulcanizing press are collected in mill processing, and standing is cooled to room temperature
Afterwards, it then vacuum freeze drying and is ground up, sieved, obtains modified elastomer particle；
(4) 1:10 in mass ratio again, modified elastomer particle is added in polyflon, is stirred and dries,
Collect dry mixed resin is placed in injection molding machine, injection process simultaneously demoulds and repairs overlap and burr, can be prepared into institute
The high-strength machinery sealing material of shearing resistance cut type stated.
2. a kind of preparation method of high-strength machinery sealing material of shearing resistance cut type according to claim 1, it is characterised in that: institute
The Crystallizing treatment temperature stated is 85~95.
3. a kind of preparation method of high-strength machinery sealing material of shearing resistance cut type according to claim 1, it is characterised in that: institute
The dispersion slurries pH stated is adjusted using 1% sodium hydroxide solution of 1% nitric acid of mass fraction and mass fraction.
4. a kind of preparation method of high-strength machinery sealing material of shearing resistance cut type according to claim 1, it is characterised in that: institute
The screenings of crossing stated is sieved using 100 μm of sieves.
5. a kind of preparation method of high-strength machinery sealing material of shearing resistance cut type according to claim 1, it is characterised in that: institute
The copper chloride solution drop rate stated is 2mL/min.
6. a kind of preparation method of high-strength machinery sealing material of shearing resistance cut type according to claim 1, it is characterised in that: institute
The mill processing stated is is 95~105 DEG C in open mill temperature, heat preservation mill processing.
7. a kind of preparation method of high-strength machinery sealing material of shearing resistance cut type according to claim 1, it is characterised in that: institute
The vulcanizing press compression process stated is to suppress 5~10min in vulcanizing press at 85~100 DEG C, 1~2MPa.
8. a kind of preparation method of high-strength machinery sealing material of shearing resistance cut type according to claim 1, it is characterised in that: institute
The carrying out washing treatment stated is successively to be washed 3~5 times respectively with deionized water and dehydrated alcohol.
9. a kind of preparation method of high-strength machinery sealing material of shearing resistance cut type according to claim 1, it is characterised in that: institute
It is 40mm that the injection process stated, which is in screw diameter, and injection pressure is 155~160MPa, and screw rod slewing rate is 55~60r/
Injection process under min.
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|---|---|---|---|
| CN201910539815.XA CN110330746A (en) | 2019-06-21 | 2019-06-21 | A kind of preparation method of the high-strength machinery sealing material of shearing resistance cut type |
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| CN201910539815.XA CN110330746A (en) | 2019-06-21 | 2019-06-21 | A kind of preparation method of the high-strength machinery sealing material of shearing resistance cut type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115537181A (en) * | 2022-09-02 | 2022-12-30 | 浙江国泰萧星密封材料股份有限公司 | Talc-based high-temperature-resistant sealing material and preparation method thereof |
-
2019
- 2019-06-21 CN CN201910539815.XA patent/CN110330746A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115537181A (en) * | 2022-09-02 | 2022-12-30 | 浙江国泰萧星密封材料股份有限公司 | Talc-based high-temperature-resistant sealing material and preparation method thereof |
| CN115537181B (en) * | 2022-09-02 | 2024-02-09 | 浙江国泰萧星密封材料股份有限公司 | Talc-based high-temperature-resistant sealing material and preparation method thereof |
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