CN105860493B - A kind of shock isolating pedestal ekalead polymer composite - Google Patents
A kind of shock isolating pedestal ekalead polymer composite Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
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Abstract
A kind of shock isolating pedestal ekalead polymer composite belongs to field of rubber technology.Organic clay is added to chlorohydrin rubber and has been prepared new polymer composite by the present invention using the method for fusion intercalation, the polymer composite have with lead metal similar in mechanical property, damping capacity.The addition of modified organic clay, significantly improves stress under its small strain.The invention provides new core hybrid material to be used for shock mount:With high damping properties, the damping ratio of bearing can be increased substantially.The shock mount prepared using above-mentioned new core hybrid material have the characteristics that excellent damping capacity, equivalent level rigidity be low and low land seismic wave under it is yielding, meet the needs of bridge practical application, realize the replacement of lead for retractable pencil in bearing.
Description
Technical field
The invention belongs to field of rubber technology, is related to a kind of shock isolating pedestal novel high polymer composite, material tool
Have with lead metal similar in mechanical property and damping characteristic, available for build, in isolation bridge bearing high-damping lead for retractable pencil replacement.
Background technology
Earthquake is a kind of sudden, and frequency is high, it is difficult to the natural calamity of prediction, to the very harmful of human society.Earthquake
And its secondary disaster triggered causes building, a large amount of of bridge facility to collapse and destroy, make the mankind lives and properties cause it is huge
Big loss.Compared with traditional firm method anti-seismic technology, the damping effect of the rubber earthquake isolation support based on " base isolation concept " is more
To be excellent.In recent years, shock isolating pedestal has become world today's high anti-seismic, the important building of shockproof requirement, the first choice of bridge
Scheme.On the one hand critical elements of the shock isolating pedestal as " base isolation ", its major function are supporting building, the weight of bridge
Amount, on the other hand it is the dynamic characteristics for changing structural system, mainly extends building, the natural vibration period of bridge, so as to effectively
Reduce its earthquake response.
At present, what is be most widely used in shock isolating pedestal is normal stack rubber support and lead core rubber support.(1) it is general
Logical laminated rubber bases, are typically manufactured using natural rubber, and natural gum has the characteristics of high flexibility, high resiliency, high intensity, are assigned
The good vertical bearing capacity of bearing and horizontal shear deformability.But the damping capacity difference of this bearing is, it is necessary to and damper
And with improve damping.Because damper involves great expense, the application of the type bearing is limited;(2) lead core rubber support, it is
In normal stack rubber support, one or more lead rods are poured into vertically, so as to improve the damping capacity of bearing.But lead-rubber
Bearing equivalent level rigidity is high, often exceeds critical field, and when earthquake occurs, surrender fracture, automatic recovery ability easily occur for lead for retractable pencil
Decline.In addition under normal load, the effect of low periodic perturbations, lead for retractable pencil in bearing produces tired failure by shear, under damping capacity
Drop.And lead for retractable pencil can also cause serious pollution to environment.
The content of the invention
Ekalead polymer composite belongs to field of rubber technology.It is used to subtract the invention provides new core hybrid material
Shake bearing:With high damping properties, the damping ratio of bearing can be increased substantially.Prepared using above-mentioned new core hybrid material
Shock mount have the characteristics that excellent damping capacity, equivalent level rigidity be low and low land seismic wave under it is yielding, meet bridge
The needs of practical application, realize the replacement of lead for retractable pencil in bearing.
In order to solve the above technical problems, present invention employs following proposal:
1st, in terms of mass parts, core uses chlorohydrin rubber, is formulated as follows:
Wherein staple length is 3.0 ± 0.5mm.
2nd, the present invention provides a kind of new ekalead polymer composite and prepares bearing core instead of original lead for retractable pencil, its feature
It is:Chopped fiber is nylon 66 fiber, and length is 3.0 ± 0.5mm.
3rd, the present invention provides a kind of new ekalead polymer composite and prepares bearing core instead of original lead for retractable pencil, its feature
It is:Organic clay synthesis step is as follows:10.0g sodium-based montmorillonites are added in 400mL deionized waters, magnetic agitation 1h is quiet
24h is put to complete swelling;4.00g intercalator Cetyltrimethylammonium bromides are added to 100mL deionized water dissolvings in addition
Obtain intercalant solution;Round-bottomed flask equipped with the montmorillonite aqueous solution is put into and is incubated and stirs into 80 DEG C of water-baths, then will be inserted
Layer agent solution is added drop-wise in round-bottomed flask, is dripped off in 35min, reacts 5h, cooling and standings;Remove supernatant liquor and obtain white sink
Form sediment, suction filtration is washed with deionized for several times, until filtrate mass percent is 1% AgNO3Solution detection is without faint yellow heavy
Form sediment;Gained white precipitate is transferred in beaker, and 24h is dried under the conditions of 80 DEG C, obtains organic clay.
The present invention provides a kind of preparation method of shock mount ekalead polymer composite, and concrete technology step is:
(1) sodium-based montmorillonite organises:10.0g sodium-based montmorillonites are added in 400mL deionized waters, magnetic agitation 1h,
24h is stood to complete swelling;4.00g intercalator Cetyltrimethylammonium bromides are added to 100mL deionized waters in addition
Dissolving obtains intercalant solution;Round-bottomed flask equipped with the montmorillonite aqueous solution is put into and is incubated and stirs into 80 DEG C of water-baths, then
Intercalant solution is added drop-wise in round-bottomed flask, dripped off in 35min, reacts 5h, cooling and standings;Remove supernatant liquor and obtain white
Precipitation, suction filtration is washed with deionized for several times, until filtrate mass percent is 1% AgNO3Solution is detected without faint yellow
Precipitation;Gained white precipitate is transferred in beaker, and 24h is dried under the conditions of 80 DEG C, obtains organic clay.
(2) ekalead polymer composite preparation technology:Chlorohydrin rubber is plasticated in two-roll mill room temperature, then added
(1) organic clay obtained, it is allowed to be kneaded uniformly;Hot-rolling mill mixing is used afterwards, and melting temperature is 95 ± 5 DEG C, makes it
Obvious molten condition, 10 ± 5min of melting heat refining are presented at this temperature, uniformly rear slice to be mixed is cooled to room temperature;Exist again
It is kneaded in mill, sequentially adds activating agent, accelerator, age resistor, chopped fiber, is eventually adding carbon black and four oxidations three
Lead, carbon black can also be added without, slice after being kneaded uniformly;It is expelled to by extruder in cylindrical mold cavities, injection temperature 60
DEG C, pressure 15Mpa, pressurize 30min, cooling, die sinking, preforming core is obtained, is finally vulcanized to obtain ekalead height at 160 DEG C
Molecular composite material core.
(3) the ekalead polymer composite core for obtaining step (2) assembles with bearing respectively, obtains ekalead macromolecule
Composite core shock mount.
Beneficial effects of the present invention
Organic clay is added to chlorohydrin rubber using the method for fusion intercalation and has prepared new macromolecule by the present invention
Composite, the polymer composite have with lead metal similar in mechanical property, damping capacity.Modified organic clay adds
Enter, significantly improve stress under its small strain.It is made into core and replaces lead for retractable pencil, effectively increases the damping capacity of rubber support
Equivalent level rigidity.Vertical rigidity, equivalent level rigidity and the damping ratio of prepared shock isolating pedestal meet actual bridge application
Need, comprehensive damping works well.The shock isolating pedestal core prepared compared to lead metal, the ekalead polymer composite core
There is high-performance, pollution-free and inexpensive.
Brief description of the drawings
Fig. 1 is the rubber support structural representation with lead for retractable pencil and ekalead polymer composite.Numeral mark meaning in figure
For:
The upper junction steel plates of 1-;2- upper sealing plates;3- connecting bolts;4- intermediate laminate rubber;5- steel plates;6- shear keys;7- lead
Core;Shrouding under 8-;Junction steel plate under 9-.
Fig. 2 is the hysteresis loop under 100% strain of ekalead macromolecule core rubber support in embodiment 3.
Embodiment
The raw materials used source of the present invention is as follows
Chlorohydrin rubber, Wuhan Youji Industrial Co., Ltd.;The rubber such as stearic acid, zinc oxide, accelerator, age resistor, carbon black
Compounding ingredient, Sheng Hua product of rubber and plastic Co., Ltd provide;Chopped fiber, model FN66-3, its bulk composition are nylon66 fiber, and fiber is grown
3.0 ± 0.5mm is spent, Heilungkiang is expanded space chopped fiber new material limited company and provided.Organic clay, laboratory is modified, with ten
Eight alkyl trimethyl ammonium bromides carry out organic-treating as intercalator to sodium-based montmorillonite.Cetyltrimethylammonium bromide,
Nanjing chemical reagent limited company provides.Silver nitrate, Guangzhou Jia Le Chemical Co., Ltd.s provide.Below according to class of the present invention
Formula and technique prepared by lead polymer composite rubber core bearing, by embodiment, the present invention will be further described, but
The invention is not restricted to these embodiments.
Embodiment 1-3
Ekalead polymer composite is prepared according to table 1, specific preparation technology is as follows:
The chlorohydrin rubber formula of table 1
Sodium-based montmorillonite organises:10.0g sodium-based montmorillonites are added in 400mL deionized waters, magnetic agitation 1h, stood
24h is to complete swelling;4.00g intercalator Cetyltrimethylammonium bromides are added to 100mL deionized water dissolvings in addition
Obtain intercalant solution;Round-bottomed flask equipped with the montmorillonite aqueous solution is put into and is incubated and stirs into 80 DEG C of water-baths, then will be inserted
Layer agent solution is added drop-wise in round-bottomed flask, is dripped off in 35min, reacts 5h, cooling and standings;Remove supernatant liquor and obtain white sink
Form sediment, suction filtration is washed with deionized for several times, until filtrate mass percent is 1% AgNO3Solution detection is without faint yellow heavy
Form sediment;Gained white precipitate is transferred in beaker, and 24h is dried under the conditions of 80 DEG C, obtains organic clay.
Ekalead polymer composite preparation technology according to:Chlorohydrin rubber/organic clay ratio be 100/60,100/100,
100/150 ratio, chlorohydrin rubber is plasticated in two-roll mill room temperature, then adds organic clay, be allowed to be kneaded uniformly;It
Hot-rolling mill mixing is used afterwards, and melting temperature is 95 ± 5 DEG C, makes it that obvious molten condition be presented at this temperature, is melted
10 ± 5min of heat refining, uniformly rear slice to be mixed are cooled to room temperature;Be kneaded on a mill again, sequentially add activating agent,
Accelerator, age resistor, chopped fiber, carbon black and lead orthoplumbate are eventually adding, slice after being kneaded uniformly;It is expelled to by extruder
In cylindrical mold cavities, injection temperature be 60 DEG C, pressure 15Mpa, pressurize 30min, cooling, die sinking, obtain different proportion it is pre- into
The ekalead macromolecule core of type, finally vulcanized to obtain ekalead polymer composite core at 160 DEG C --- chlorohydrin rubber/
Organic clay 100/60, chlorohydrin rubber/organic clay 100/100, chlorohydrin rubber/organic clay 100/150 (are designated as implementing successively
Example 1,2,3).
By obtained ekalead polymer composite core and vulcanization bearing assembling, obtain ekalead polymer composite and subtract
Shake bearing.
Weigh 7 grams of chlorohydrin rubber elastomeric compound samples and time of scorch T10 and sulfurizing time T90 are determined on vulcameter.Will
Lamination elastomeric compound is vulcanized on vulcanizing press by 160 DEG C × T90, sulfide stress 15MPa, and the ekalead being crosslinked is high
Molecular composite material.Mechanics Performance Testing is carried out to the composite of crosslinking, obtained ekalead polymer composite performance is shown in
Table 2 and table 3.
Table 2
Numbering | Shao's A hardness | 10% stretches/Mpa surely | 100% stretches/Mpa surely | Tensile strength/MPa |
Embodiment 1 | 60 | 7.5 | 8.2 | 11.4 |
Embodiment 2 | 61 | 7.6 | 8.5 | 13.1 |
Embodiment 3 | 63 | 7.8 | 8.7 | 13.3 |
Table 3
From table 2 it can be seen that the ekalead polymer composite hardness is higher, rubber support is assembled them into, it will make
Rubber support possesses higher vertical rigidity, while the lower stress of small strain effect significantly improves, close to the stress at definite elongation of pure lead,
Equivalent level rigidity during rubber support horizontal distortion can be increased, make rubber support that there is more excellent anti-pressure ability.With having
The increase of machine clay dosage, organic clay is assembled to form the very strong filler network of rigidity in composite, significantly improves compound
The vertical rigidity of material.
The vertical rigidity standard requirement of Standard finished product bearing is 678 × (1 ± 30%) kN/mm, equivalent level rigidity
Standard requirement is 1.4 × (1 ± 15%) kN/mm, and the requirement of equivalent damping ratio standard is 22.3 × (1 ± 15%) kN/mm.By table 3
Understand, using the ekalead polymer composite be the shock mount properties that assemble of core within critical field, satisfaction
Bridge pad performance requirement.
Embodiment 4-6
Ekalead polymer composite is prepared according to table 4, specific preparation technology is as follows:
The chlorohydrin rubber formula of table 4
Formula | Embodiment 4 | Embodiment 5 | Embodiment 6 |
Chlorohydrin rubber | 100 parts | 100 parts | 100 parts |
Organic clay | 60 parts | 100 parts | 150 parts |
Stearic acid | 1.5 part | 1.5 part | 1.5 part |
Ethylene thiourea | 2.5 part | 2.5 part | 2.5 part |
Antioxidant NBC | 1 part | 1 part | 2 parts |
Antioxidant MB | 1 part | 2 parts | 2 parts |
Chopped fiber | 15 parts | 15 parts | 15 parts |
Carbon black | 0 part | 0 part | 0 part |
Lead orthoplumbate | 2 parts | 3 parts | 4 parts |
Sodium-based montmorillonite organises:10.0g sodium-based montmorillonites are added in 400mL deionized waters, magnetic agitation 1h, stood
24h is to complete swelling;4.00g intercalator Cetyltrimethylammonium bromides are added to 100mL deionized water dissolvings in addition
Obtain intercalant solution;Round-bottomed flask equipped with the montmorillonite aqueous solution is put into and is incubated and stirs into 80 DEG C of water-baths, then will be inserted
Layer agent solution is added drop-wise in round-bottomed flask, is dripped off in 35min, reacts 5h, cooling and standings;Remove supernatant liquor and obtain white sink
Form sediment, suction filtration is washed with deionized for several times, until filtrate mass percent is 1% AgNO3Solution detection is without faint yellow heavy
Form sediment;Gained white precipitate is transferred in beaker, and 24h is dried under the conditions of 80 DEG C, obtains organic clay.
Ekalead polymer composite preparation technology according to:Chlorohydrin rubber/organic clay ratio be 100/60,100/100,
100/150 ratio, chlorohydrin rubber is plasticated in two-roll mill room temperature, then adds organic clay, be allowed to be kneaded uniformly;It
Hot-rolling mill mixing is used afterwards, and melting temperature is 95 ± 5 DEG C, makes it that obvious molten condition be presented at this temperature, is melted
10 ± 5min of heat refining, uniformly rear slice to be mixed are cooled to room temperature;Be kneaded on a mill again, sequentially add activating agent,
Accelerator, age resistor, chopped fiber, lead orthoplumbate is eventually adding, slice after being kneaded uniformly;Cylinder is expelled to by extruder
In die cavity, injection temperature is 60 DEG C, pressure 15Mpa, pressurize 30min, cooling, die sinking, obtains the preforming class of different proportion
Lead macromolecule core, finally vulcanized to obtain ekalead polymer composite core at 160 DEG C --- chlorohydrin rubber/organic glutinous
Soil 100/60, chlorohydrin rubber/organic clay 100/100, chlorohydrin rubber/organic clay 100/150 (be designated as successively embodiment 4,5,
6)。
By obtained ekalead polymer composite core and vulcanization bearing assembling, obtain ekalead polymer composite and subtract
Shake bearing.
Weigh 7 grams of chlorohydrin rubber elastomeric compound samples and time of scorch T10 and sulfurizing time T90 are determined on vulcameter.Will
Lamination elastomeric compound is vulcanized on vulcanizing press by 160 DEG C × T90, sulfide stress 15MPa, and the ekalead being crosslinked is high
Molecular composite material.Mechanics Performance Testing is carried out to the composite of crosslinking, obtained ekalead polymer composite performance is shown in
Table 5 and table 6.
Table 5
Numbering | Shao's A hardness | 10% stretches/Mpa surely | 100% stretches/Mpa surely | Tensile strength/MPa |
Embodiment 1 | 58 | 7.7 | 8.3 | 11.6 |
Embodiment 2 | 61 | 7.8 | 8.7 | 12.8 |
Embodiment 3 | 63 | 8.0 | 8.9 | 13.5 |
Table 6
As can be seen from Table 5, the ekalead polymer composite hardness is higher, assembles them into rubber support, it will make
Rubber support possesses higher vertical rigidity, while the lower stress of small strain effect significantly improves, close to the stress at definite elongation of pure lead,
Equivalent level rigidity during rubber support horizontal distortion can be increased, make rubber support that there is more excellent anti-pressure ability.With having
The increase of machine clay dosage, organic clay is assembled to form the very strong filler network of rigidity in composite, while the short fibre added
Dimension serves synergy with organic clay, significantly improves the vertical rigidity of composite.
The vertical rigidity standard requirement of Standard finished product bearing is 678 × (1 ± 30%) kN/mm, equivalent level rigidity
Standard requirement is 1.4 × (1 ± 15%) kN/mm, and the requirement of equivalent damping ratio standard is 22.3 × (1 ± 15%) kN/mm.By table 6
Understand, using the ekalead polymer composite be the shock mount properties that assemble of core within critical field, satisfaction
Bridge pad performance requirement.
Embodiment 7-9
Ekalead polymer composite is prepared according to table 7, specific preparation technology is as follows:
The chlorohydrin rubber formula of table 7
Formula | Embodiment 7 | Embodiment 8 | Embodiment 9 |
Chlorohydrin rubber | 100 parts | 100 parts | 100 parts |
Organic clay | 60 parts | 100 parts | 150 parts |
Stearic acid | 2 parts | 2 parts | 2 parts |
Ethylene thiourea | 2 parts | 2 parts | 2 parts |
Antioxidant NBC | 1 part | 1 part | 2 parts |
Antioxidant MB | 1 part | 2 parts | 2 parts |
Chopped fiber | 10 parts | 10 parts | 10 parts |
Carbon black | 10 parts | 10 parts | 10 parts |
Lead orthoplumbate | 2 parts | 3 parts | 4 parts |
Sodium-based montmorillonite organises:10.0g sodium-based montmorillonites are added in 400mL deionized waters, magnetic agitation 1h, stood
24h is to complete swelling.4.00g intercalator Cetyltrimethylammonium bromides are added to 100mL deionized water dissolvings in addition
Obtain intercalant solution;Round-bottomed flask equipped with the montmorillonite aqueous solution is put into and is incubated and stirs into 80 DEG C of water-baths, then will be inserted
Layer agent solution is added drop-wise in round-bottomed flask, is dripped off in 35min, reacts 5h, cooling and standings;Remove supernatant liquor and obtain white sink
Form sediment, suction filtration is washed with deionized for several times, until filtrate mass percent is 1% AgNO3Solution detection is without faint yellow heavy
Form sediment;Gained white precipitate is transferred in beaker, and 24h is dried under the conditions of 80 DEG C, obtains organic clay.
Ekalead polymer composite preparation technology according to:Chlorohydrin rubber/organic clay ratio be 100/60,100/100,
100/150 ratio, chlorohydrin rubber is plasticated in two-roll mill room temperature, then adds organic clay, be allowed to be kneaded uniformly;It
Hot-rolling mill mixing is used afterwards, and melting temperature is 95 ± 5 DEG C, makes it that obvious molten condition be presented at this temperature, is melted
10 ± 5min of heat refining, uniformly rear slice to be mixed are cooled to room temperature;Be kneaded on a mill again, sequentially add activating agent,
Accelerator, age resistor, chopped fiber, carbon black and lead orthoplumbate are eventually adding, slice after being kneaded uniformly;It is expelled to by extruder
In cylindrical mold cavities, injection temperature be 60 DEG C, pressure 15Mpa, pressurize 30min, cooling, die sinking, obtain different proportion it is pre- into
The ekalead macromolecule core of type, finally vulcanized to obtain ekalead polymer composite core at 160 DEG C --- chlorohydrin rubber/
Organic clay 100/60, chlorohydrin rubber/organic clay 100/100, chlorohydrin rubber/organic clay 100/150 (are designated as implementing successively
Example 7,8,9).
By obtained ekalead polymer composite core and vulcanization bearing assembling, obtain ekalead polymer composite and subtract
Shake bearing.
Weigh 7 grams of chlorohydrin rubber elastomeric compound samples and time of scorch T10 and sulfurizing time T90 are determined on vulcameter.Will
Lamination elastomeric compound is vulcanized on vulcanizing press by 160 DEG C × T90, sulfide stress 15MPa, and the ekalead being crosslinked is high
Molecular composite material.Mechanics Performance Testing is carried out to the composite of crosslinking, obtained ekalead polymer composite performance is shown in
Table 8 and table 9.
Table 8
Numbering | Shao's A hardness | 10% stretches/Mpa surely | 100% stretches/Mpa surely | Tensile strength/MPa |
Embodiment 1 | 61 | 7.6 | 8.1 | 12.5 |
Embodiment 2 | 63 | 7.7 | 8.4 | 13.2 |
Embodiment 3 | 64 | 7.9 | 8.8 | 13.8 |
Table 9
As can be seen from Table 8, the ekalead polymer composite hardness is higher, assembles them into rubber support, it will make
Rubber support possesses higher vertical rigidity, while the lower stress of small strain effect significantly improves, close to the stress at definite elongation of pure lead,
Equivalent level rigidity during rubber support horizontal distortion can be increased, make rubber support that there is more excellent anti-pressure ability.With having
The increase of machine clay dosage, organic clay is assembled to form the very strong filler network of rigidity in composite, while the short fibre added
Dimension serves synergy with organic clay, significantly improves the vertical rigidity of composite.
The vertical rigidity standard requirement of Standard finished product bearing is 678 × (1 ± 30%) kN/mm, equivalent level rigidity
Standard requirement is 1.4 × (1 ± 15%) kN/mm, and the requirement of equivalent damping ratio standard is 22.3 × (1 ± 15%) kN/mm.By table 9
Understand, using the ekalead polymer composite be the shock mount properties that assemble of core within critical field, satisfaction
Bridge pad performance requirement.
Note:The G0.8 of rubber support finished product model J4Q 300 × 420 × 137, its internal structure are used in this experiment:Steel
Plate thickness 4mm × 9 layer, laminated rubber thickness 6mm × 10 layer, but the present invention is not only limited in the rubber support of this kind of structure.
Claims (4)
1. ekalead polymer composite core, it is characterised in that in terms of mass parts, formula is as follows:
Wherein staple length is 3.0 ± 0.5mm.
2. core according to claim 1, it is characterised in that:Chopped fiber is nylon 66 fiber, and length is 3.0 ± 0.5mm.
3. core according to claim 1, it is characterised in that:Organic clay synthesis step is as follows:By 10.0g sodium Ji Mengtuo
Soil is added in 400mL deionized waters, magnetic agitation 1h, stands 24h to complete swelling;In addition by 4.00g intercalator octadecyls
Trimethylammonium bromide is added to 100mL deionized water dissolvings and obtains intercalant solution;Round bottom equipped with the montmorillonite aqueous solution is burnt
Bottle, which is put into 80 DEG C of water-baths, to be incubated and stirs, then intercalant solution is added drop-wise in round-bottomed flask, is dripped off in 35min, is reacted
5h, cooling and standings;Remove supernatant liquor and obtain white precipitate, suction filtration is washed with deionized for several times, until filtrate is with quality hundred
Fraction is 1% AgNO3Solution is detected without pale yellow precipitate;Gained white precipitate is transferred in beaker, is dried under the conditions of 80 DEG C
24h, obtain organic clay.
4. prepare the method for the core as described in claim 1-3 any one, it is characterised in that:Chlorohydrin rubber is opened in double roller
Mill room temperature is plasticated, and then adds organic clay, is allowed to be kneaded uniformly;Hot-rolling mill mixing is used afterwards, and melting temperature is
95 ± 5 DEG C, make it that obvious molten condition be presented at this temperature, melt 10 ± 5min of heat refining, uniformly rear slice to be mixed is cold
But to room temperature;It is kneaded on a mill again, sequentially adds activating agent, accelerator, age resistor, chopped fiber, be eventually adding charcoal
Black and lead orthoplumbate, carbon black can be also added without, slice after being kneaded uniformly;It is expelled in cylindrical mold cavities, is noted by extruder
Temperature is penetrated as 60 DEG C, pressure 15Mpa, pressurize 30min, cooling, die sinking, preforming core is obtained, is finally vulcanized at 160 DEG C
Obtain ekalead polymer composite core.
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