CN109535510A - A kind of sealing ring - Google Patents
A kind of sealing ring Download PDFInfo
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- CN109535510A CN109535510A CN201811391477.1A CN201811391477A CN109535510A CN 109535510 A CN109535510 A CN 109535510A CN 201811391477 A CN201811391477 A CN 201811391477A CN 109535510 A CN109535510 A CN 109535510A
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- 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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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Abstract
The present invention relates to a kind of sealing rings, belong to technical field of polymer materials.Sealing ring of the present invention includes the ingredient of following parts by weight: low form nitrile rubber: 80-100 parts, carbon black: 50-100 parts, gutta percha: 15-25 parts, plasticizer: 5-15 parts, abaca fibre: 5-15 parts, modified carbon nano-tube: 2-5 parts, organic zinc: 2-8 parts, age resister: 8-12 parts, vulcanizing agent: 3-8 parts.Sealing ring compatibility of the present invention is reasonable, and processing technology is simple and easy, and the sealing ring processed has preferable intensity, wearability, anti-extrusion.Sealing ring compatibility of the present invention is reasonable, be especially added to gutta percha, abaca fibre, plasticizer and modified carbon nano-tube, the carbon black of compounding, the age resister of compounding, compounding vulcanizing agent further improve the comprehensive performance of sealing ring.
Description
Technical field
The present invention relates to a kind of sealing rings, belong to technical field of polymer materials.
Background technique
Sealing ring is very common very necessary part in life production, except the general requirement that should have sealing ring material
Outside, sealing ring is also noted that following requirement: high resilience and resilience；Mechanical strength appropriate, including tensile strength, elongation
Rate and tearing toughness etc.；Performance is stablized, and is not easy to be swollen in the medium, thermal pinch (Joule effect)；Easy processing molding, and
It is able to maintain accurate size；Do not corrode contact surface, not pollution medium etc..Meet the most suitable and most common material of above-mentioned requirements
Material is rubber, so sealing ring rubber material multi-purpose greatly is made.The selection of the various types of rubber, sealing ring material seals it
Performance and used life important in inhibiting.The performance of material directly affects the service performance of sealing ring.And NBR nitrile rubber system
At sealing ring be suitable for petroleum hydraulic oil, glycol system hydraulic oil, diester-based lubricating oil, gasoline, water, silicone grease, silicone oil
It is used in equal media, general use temperature range is -40~120 DEG C, is the rubber seal that current purposes is most wide, cost is minimum
Part.Those skilled in the art, which are also constantly dedicated to improving, improves nitrile rubber sealing ring.
Summary of the invention
The present invention for the problems of prior art defect, provide it is a kind of with high resiliency, excellent low temperature properties
Sealing ring.
Above-mentioned purpose of the invention can be realized by the following technical scheme: a kind of sealing ring, and the sealing ring includes
The ingredient of following parts by weight:
Low form nitrile rubber: 80-100 parts
Carbon black: 50-100 parts
Gutta percha: 15-25 parts
Plasticizer: 5-15 parts
Abaca fibre: 5-15 parts
Modified carbon nano-tube: 2-5 parts
Organic zinc: 2-8 parts
Age resister: 8-12 parts
Vulcanizing agent: 3-8 parts.
Sealing ring of the present invention compounds addition carbon black and gutta percha using low form nitrile rubber as mainly forming, with
And the other compositions such as abaca fibre make high-performance sealed circle have high resiliency and excellent by reasonable compatibility between each ingredient
Cryogenic property.
Wherein, gutta percha is a kind of natural high molecular polymer, and main component is the poly- isoamyl two of a trans- Isosorbide-5-Nitrae one
Alkene, each other isomer identical as natural rubber (NR, cis- one polyisoprene of an Isosorbide-5-Nitrae) chemical composition, trans- molecule
Configuration makes gutta percha strand have three big features: (1) strand is flexible chain, and flexible molecule chain is to constitute spring chain
Basis；(2) contain double bond, can be vulcanized；(3) trans- chain structure orderly easily piles up crystallization.The present invention using nitrile rubber and
Gutta percha compounding is used as main body substrate, on the one hand, compared with single addition nitrile rubber, sealing ring obtained has more excellent
Different dynamic tensile fatigue behaviour；On the other hand, currently used carbon black is mostly small molecule, has plasticising to make rubber matrix
With, the physical property of vulcanizate is influenced to a certain extent, and gutta percha is the macromolecule polyalcohol containing polar group, it can
As rubber matrix and carbon black interface modifier, the dispersibility of carbon black can not only be improved, and contain polarized in gutta percha
Epoxy group and nonpolar gutta percha molecule segment, the former can with carbon black generate strong interaction, the latter again with nonpolarity
Rubber has certain compatibility, therefore gutta percha may be used as the interface modifier of white carbon black Yu non-polar rubber system.
Preferably, the mass ratio of the low form nitrile rubber and gutta percha is (4-5): 1.Gutta percha is close
Content in seal is excessive, then can enhance the plasticity of sealing ring, causes sealing ring to become high-ductility sealing ring, is unfavorable for it in reality
Application in border；Content of the gutta percha in sealing ring is very few, then cannot play the role of improving sealing ring tensile fatigue,
The effect of its interface modifier cannot preferably be played.
Abaca fibre can be obtained from the abaca leaf of Musaceae, can also be obtained from bajiao banana, draw ratio is big, and intensity
High, porosity height, the orienting stephanoporate structure that the present invention utilizes it to have make it compound mixing with carbon black and carbon nanotube, can
By carbon black and the excellent filling of carbon nanotube, to increase the density of sealing ring obtained, preferable mechanical property is made it have.And
And compared with not adding sealing ring made from abaca fibre, sealing ring made from abaca fibre is added on tearability and intensity
Great raising is suffered from, to find out its cause, including the following two kinds: one, abaca fibre has certain flexibility and length, close
A stronger network structure can be formed in seal, therefore for sealing ring, the internal flowing under alternating force effect
Mechanism is reduced and more whole, therefore can improve the tensile strength of sealing ring；Two, lignin and hemicellulose in abaca fibre
Between play the role of hydrogen bond, intrusion of the oxygen molecule to vulcanizate can be effectively obstructed, to protect sealing ring not oxidized
And quick aging.And carbon black not only has good conductive property, and has good reinforcement to make rubber matrix as conductive filler
With making sealing ring obtained that there is preferable air-tightness, watertightness, pressure sealing, corrosion resistance, also have that density is small, bullet
The advantages that property is good, performance is stable, cheap.Carbon black granularity is minimum, is filled in rubber matrix by the secondary structure reunited
Conduction is participated in, for the electric conductivity of system by rubber matrix viscosity, the viscosity of rubber, polarity also will affect charcoal in mixing process
Black dispersion.And the polarity of matrix and carbon blacksurface Electronic interactions and can influence carbon black and matrix compatibility and
Dispersion performance.Nitrile rubber is polar rubber, the polarity carbochain and carbon blacksurface polar molecule group of matrix attract each other to
Increase the compatibility of matrix and carbon black, carbon black pellet is attracted in matrix polar molecule chain.Increase with content of carbon black, is being kneaded
The shear action that the secondary structure particle of carbon black is subject in the process constantly increases, and is also increased by the probability of failure by shear, causes charcoal
Black secondary structure rupture, so dispersion is more evenly.Carbon nanotube be diameter be 1-10nm, length is tens microns even more big
Single layer (single wall) or multilayer (multi wall) graphite cylinder.The chemical composition and atom combining form of carbon nanotube are simple, single layer
For six face shape planar structures, radial is nano-scale, and draw ratio is big (100-1000), compound with regular structure, large specific surface area, intensity
Height has preferable heat-resisting, the corrosion-resistant, heat shock resistance of graphite and self-lubrication, biocompatibility, thermal conductance, electrical conductance.But
Carbon nanotube assembles (entanglements) tendency and chemical inertness is strong, dispersibility in rubber and limits with the bond properties difference of rubber
Its application in rubber need to carry out surface to carbon nanotube and be modified, and improve dispersibility of the carbon nanotube in rubber.The present invention
In sealing ring abaca fibre, carbon nanotube and carbon black and be used as reinforcing agent when, due to the synergistic effect between three, so that abaca
Fiber, carbon nanotube and carbon black become " grape cluster " structure of real meaning in rubber matrix, and wherein carbon nanotube is equivalent to
" stalk " of " grape cluster ", this structure can be efficiently modified the performance deficiency of sizing material when carbon nanotube or carbon black is applied alone, drop simultaneously
The resistance that low sealing ring uses.Carbon black, modified carbon nano-tube are added in abaca fibre reinforcing and filling system nitrile rubber, caused
The rubber vulcanization time extends, and improves the state of cure (vulcanization) of sizing material, and the antistatic property of sizing material can be improved, and production antistatic property is excellent
And the good rubber product of oil resistance.As modified CNTs dosage increases, the hardness of black-reinforced filling system nitrile rubber,
100% stress at definite elongation and tearing strength are in increase tendency, and tensile strength slowly declines, and elongation rate of tensile failure reduces.In nitrile rubber
The dispersion performance of middle carbon black is in opposite trend, increases with content of carbon black and improves, therefore comprehensive each factor, in sealing ring of the present invention
Under the action of being used in compounding modified carbon nano-tube, abaca fibre and carbon black and making reinforcing agent, need to add 50-100 parts of carbon blacks,
10-15 parts of abaca fibres and 2-5 parts of modified carbon nano-tubes.
In addition, zinc oxide is the vulcanizing agent of the traditional vulcanizing activator of rubber and certain specific rubbers, China rubber at present
Glue industry zinc oxide annual consumption is estimated in 200,000 t or more.Common zinc oxide heavy metal zinc content is about 80%, and organic zinc zinc
Content can be reduced to 40% or lower.Compared with zinc oxide, organic zinc that the present invention selects has that good dispersion, density be small, sulphur
Change fireballing feature, and price is lower.Present invention organic zinc substitute common zinc oxide not only can with the feature of environmental protection of sealing ring,
Heavy metal zinc resource is saved, the wear-resisting property and ageing-resistant performance of sealing ring can also be significantly improved.
Preferably, the carbon black is the mixture of carbon black N990 and carbon black N550, the carbon black N990 and carbon black
The mass ratio of N550 is (1-3): 1.Carbon black N990 is with particle is big, degree of structuration is high, filling rubber strength is medium and permanent deformation
The characteristics of very little, carbon black N550 are a kind of good carbon blacks of reinforcing property, can assign the preferable processability of sizing material, low pressure denaturation and
Elasticity.Carbon black in the present invention is used in compounding carbon black N990 and carbon black N550, further increases the reinforcing effect of carbon black, reduces close
The compression set of seal improves resistance to medium, elasticity and the low temperature properties of sealing ring.
Further preferably, the carbon black N990 is that maleic anhydride is grafted to the carbon black that the surface carbon black N990 obtains
N990.The graft modification of carbon blacksurface is to be grafted upper polymer chain in carbon blacksurface, due to the polymer in the grafting of this method
It can be firmly bonded to carbon blacksurface, while stretching, extension provides enough repulsion in water, reassembles between tissue particles.Passing through
Key macromolecular chain on carbon black particle surface grafting is learned, and is formed on its surface the macromolecule layer of package.It connects by this method
The maleic anhydride of branch up can be firmly bonded to carbon blacksurface, colleague be grafted on the amount of the maleic anhydride of carbon blacksurface than with
The high molecular amount that carbon blacksurface combines is much larger, extensible to provide enough repulsion in water, to improve carbon black in rubber
Dispersion stabilization in matrix can also make that the interaction between carbon black and rubber can also be made to be enhanced.
Preferably, the modified carbon nano-tube is to be modified with dopamine cladding process.Coating modification carbon is received
Mitron has good dispersibility, promotes its reinforcing effect, improves the tensile strength and elongation rate of tensile failure of sealing ring composite material,
Improve its thermal stability.
Preferably, the age resister includes light stabilizer, heat stabilizer, anti ultraviolet agent, one in antioxidant
Kind is a variety of.
Further preferably, the plasticizer is environment-friendly low-temperature type plasticizer TP-90B, rubber antioxidant, antioxidant
445 mixture, three account for 40-50%, 30-40% and 10-20% of mixture respectively.
Preferably, the vulcanizing agent is sulphur, N, one of N '-penylene bismaleimide, peroxide
Or it is a variety of.Before sealing ring is uncured, lack good physical mechanical property, practical value is little.When through addition vulcanizing agent,
After vulcanization aid is vulcanized, due to the variation of molecular structure, and make its comprehensive significant modification, especially tensile strength, fixed
Stress, elongation, elasticity, wearability, hardness etc. is stretched to become apparent.And the vulcanizing agent being added also helps the solution of carbon nanotube
It twines.
Further preferably, sulphur and N in the vulcanizing agent, the mass ratio 1.5- of N '-penylene bismaleimide
2.5:1.Through testing, when vulcanizing agent selects sulphur and N, N '-penylene bismaleimide 1.5-2.5:1 in mass ratio to compound
When, vulcanization effect is more preferable, which is because, N, N '-penylene bismaleimide conduct auxiliary vulcanizing agent, significantly improve association
Performance improves heat resistance, significantly reduces compression set, moreover it is possible to reduce the dosage of peroxide.
The present invention also provides a kind of processing method of above-mentioned sealing ring, the processing method includes claiming by mentioned component
Take raw material, blanking, one section of mixing, two-stage mixing, molding, blanking sequence is followed successively by low form nitrile rubber, gutta percha, organic
Zinc, plasticizer, age resister, abaca fibre, carbon black, modified carbon nano-tube, vulcanizing agent；One section of mixing carries out in mixer,
Rotor speed 40-45r.min-1, 35-38 DEG C of cooling water, pressure pressure 0.8-1.2MPa, fill factor 0.75, slice after dumping
Park 5-8h；M- power curve jointly controls method when blanking control use of the present invention, i.e. subsection charging uses time control act.
Last discharge uses power curve control methods, i.e., power rise arrives maximum value after oiling, then declines and steady certain time
After carry out discharge.
In a kind of above-mentioned preparation method of sealing ring, it is sealing ring quality that when one section of mixing, which is also added into quality,
The high glue powder of 2.5-3.7%.The present invention is also added into high glue powder during the preparation process, and the introducing of high glue powder improves composite material
Storage modulus, loss modulus and viscosity, inhibit the nucleation of abscess to a certain extent；It is high compared with being added without high glue powder
The addition of rubber powder improves the impact strength of sealing ring, and when high glue powder content is 2.5-3.7%, foam structure is obviously changed
Kind, cell diameter becomes smaller, and cell density becomes larger.Also, the present invention is added in one section of mixing, can further increase high glue powder
With the compatibility of sealing ring raw material, guarantee it for the humidification of sealing ring.
Two-stage mixing carries out in open mill, and roller temperature is 55-70 DEG C, mixing time 300-480s.
Described is shaped to be injection moulded, and injection pressure is 1.52-1.82 × 10 in injection moulding3KN, sulfide stress are
1.92-2.05×103KN, vulcanization time 60-100s.It is handled using injection moulding vulcanization, sizing material has obtained before injecting mold
To being fully warmed-up and preplasticizing, good fluidity, be conducive to stabilize and increase product quality；Especially improve the densification of sealing ring
Property, precision size degree.
The molding can be compression molding, and upper mold temperature is 180-185 DEG C in compression molding, and lower die temperature is 175-
180 DEG C, molding time 120-180s.
The processing method further includes post-cure processing after compression molding, and the temperature of post-cure processing is 130-
140 DEG C, vulcanization time 90-120min.
Compared with prior art, the invention has the following advantages that
1, sealing ring of the invention compounds on nitrile matrix and is added to modified carbon nano-tube, the carbon black of compounding is mended
Strong agent, and it is further added with the comprehensive performance that machine zinc, the age resister of compounding, vulcanizing agent further increase sealing ring, especially
It is elasticity, the lower temperature resistance of sealing ring.
2, the processing technology of sealing ring of the present invention is simple and easy, is kneaded the performance for further increasing sealing ring by being segmented,
Forming method after especially two sections mixings can be selected to be molded to use and be injection moulded.Temperature appropriate and two in compression molding
Secondary vulcanizing treatment further increases the intensity of sealing ring, wearability.The good fluidity of sizing material in injection moulding, is conducive to improve close
The compactness of seal, and then improve wearability, the crush resistance of sealing ring.
Specific implementation method
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, in conjunction with implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
Table 1: the ingredient and its parts by weight of sealing ring in embodiment
Embodiment 1
Blanking: raw material is weighed by raw material described in 1 embodiment 1 of table, successively blanking in the following order: low form butyronitrile rubber
Glue, gutta percha, organic zinc, plasticizer, age resister, abaca fibre, carbon black, modified carbon nano-tube, vulcanizing agent.
One section of mixing: one section of mixing carries out in mixer, rotor speed 42r.min-1, 36 DEG C of cooling water, pressure pressure
1.0MPa, fill factor 0.75, slice parks 6h after dumping, and it is sealing ring quality that when one section of mixing, which is also added into quality,
2.5% high glue powder.
Two-stage mixing: two-stage mixing carries out in open mill, and roller temperature is 65 DEG C, mixing time 300s.
Molding: obtaining sealing ring of the present invention by injection moulding vulcanization, and injection pressure is 1.65 × 10 in injection moulding3KN,
Sulfide stress is 1.98 × 103KN, vulcanization time 80s.
Embodiment 2
Difference with embodiment 1 is only that, is shaped in the present embodiment by being pressed and molded, upper mold temperature in compression molding
It is 180 DEG C, lower die temperature is 175 DEG C, molding time 150s；Post-cure processing, post-cure processing are carried out after compression molding
Temperature be 140 DEG C, vulcanization time 100min.
Embodiment 3
Blanking: raw material is weighed by raw material described in 1 embodiment 3 of table, successively blanking in the following order: low form butyronitrile rubber
Glue, gutta percha, organic zinc, plasticizer, age resister, abaca fibre, carbon black, modified carbon nano-tube, vulcanizing agent.
One section of mixing: one section of mixing carries out in mixer, rotor speed 43r.min-1, 37 DEG C of cooling water, pressure pressure
0.9MPa, fill factor 0.75, slice parks 7h after dumping, and it is sealing ring quality that when one section of mixing, which is also added into quality,
2.8% high glue powder.
Two-stage mixing: two-stage mixing carries out in open mill, and roller temperature is 68 DEG C, mixing time 360s.
Molding: obtaining sealing ring of the present invention by injection moulding vulcanization, and injection pressure is 1.7 × 10 in injection moulding3KN, sulphur
Changing pressure is 2.02 × 103KN, vulcanization time 70s.
Embodiment 4
Difference with embodiment 3 is only that, is shaped in the present embodiment by being pressed and molded, upper mold temperature in compression molding
It is 185 DEG C, lower die temperature is 180 DEG C, molding time 160s；Post-cure processing, post-cure processing are carried out after compression molding
Temperature be 140 DEG C, vulcanization time 100min.
Embodiment 5
Blanking: raw material is weighed by raw material described in 1 embodiment 5 of table, successively blanking in the following order: low form butyronitrile rubber
Glue, gutta percha, organic zinc, plasticizer, age resister, abaca fibre, carbon black, modified carbon nano-tube, vulcanizing agent.
One section of mixing: one section of mixing carries out in mixer, rotor speed 44r.min-1, 36 DEG C of cooling water, pressure pressure
1.1MPa, fill factor 0.75, slice parks 6h after dumping, and it is sealing ring quality that when one section of mixing, which is also added into quality,
3% high glue powder.
Two-stage mixing: two-stage mixing carries out in open mill, and roller temperature is 60 DEG C, mixing time 300s.
Molding: obtaining sealing ring of the present invention by injection moulding vulcanization, and injection pressure is 1.58 × 10 in injection moulding3KN,
Sulfide stress is 1.96 × 103KN, vulcanization time 95s.
Embodiment 6
Difference with embodiment 5 is only that, is shaped in the present embodiment by being pressed and molded, upper mold temperature in compression molding
It is 183 DEG C, lower die temperature is 178 DEG C, molding time 170s；Post-cure processing, post-cure processing are carried out after compression molding
Temperature be 140 DEG C, vulcanization time 100min.
Embodiment 7
Blanking: raw material is weighed by raw material described in 1 embodiment 7 of table, successively blanking in the following order: low form butyronitrile rubber
Glue, gutta percha, organic zinc, plasticizer, age resister, abaca fibre, carbon black, modified carbon nano-tube, vulcanizing agent.
One section of mixing: one section of mixing carries out in mixer, rotor speed 41r.min-1, 37 DEG C of cooling water, pressure pressure
1.0MPa, fill factor 0.75, slice parks 7h after dumping, and it is sealing ring quality that when one section of mixing, which is also added into quality,
3.4% high glue powder.
Two-stage mixing: two-stage mixing carries out in open mill, and roller temperature is 58 DEG C, mixing time 360s.
Molding: obtaining sealing ring of the present invention by injection moulding vulcanization, and injection pressure is 1.78 × 10 in injection moulding3KN,
Sulfide stress is 2.02 × 103KN, vulcanization time 65s.
Embodiment 8
Difference with embodiment 7 is only that, is shaped in the present embodiment by being pressed and molded, upper mold temperature in compression molding
It is 185 DEG C, lower die temperature is 180 DEG C, molding time 120s；Post-cure processing, post-cure processing are carried out after compression molding
Temperature be 140 DEG C, vulcanization time 100min.
Embodiment 9
Blanking: raw material is weighed by raw material described in 1 embodiment 9 of table, successively blanking in the following order: low form butyronitrile rubber
Glue, gutta percha, organic zinc, plasticizer, age resister, abaca fibre, carbon black, modified carbon nano-tube, vulcanizing agent.
One section of mixing: one section of mixing carries out in mixer, rotor speed 40r.min-1, 38 DEG C of cooling water, pressure pressure
0.8MPa, fill factor 0.75, slice parks 8h after dumping, and it is sealing ring quality that when one section of mixing, which is also added into quality,
3.7% high glue powder.
Two-stage mixing: two-stage mixing carries out in open mill, and roller temperature is 55 DEG C, mixing time 360s.
Molding: obtaining sealing ring of the present invention by injection moulding vulcanization, and injection pressure is 1.52 × 10 in injection moulding3KN,
Sulfide stress is 1.92 × 103KN, vulcanization time 100s.
Embodiment 10
Difference with embodiment 9 is only that, is shaped in the present embodiment by being pressed and molded, upper mold temperature in compression molding
It is 185 DEG C, lower die temperature is 180 DEG C, molding time 120s；Post-cure processing, post-cure processing are carried out after compression molding
Temperature be 140 DEG C, vulcanization time 100min.
Embodiment 11
Blanking: raw material is weighed by raw material described in 1 embodiment 11 of table, successively blanking in the following order: low form butyronitrile
Rubber, gutta percha, organic zinc, plasticizer, age resister, abaca fibre, carbon black, modified carbon nano-tube, vulcanizing agent.
One section of mixing: one section of mixing carries out in mixer, rotor speed 45r.min-1, 35 DEG C of cooling water, pressure pressure
1.2MPa, fill factor 0.75, slice parks 5h after dumping, and it is sealing ring quality that when one section of mixing, which is also added into quality,
3.7% high glue powder.
Two-stage mixing: two-stage mixing carries out in open mill, and roller temperature is 70 DEG C, mixing time 360s.
Molding: obtaining sealing ring of the present invention by injection moulding vulcanization, and injection pressure is 1.82 × 10 in injection moulding3KN,
Sulfide stress is 2.05 × 103KN, vulcanization time 60s.
Embodiment 12
Difference with embodiment 11 is only that, is shaped in the present embodiment by being pressed and molded, upper mold temperature in compression molding
Degree is 183 DEG C, and lower die temperature is 178 DEG C, molding time 180s；Post-cure processing is carried out after compression molding, at post-cure
The temperature of reason is 140 DEG C, vulcanization time 100min.
Embodiment 13
Difference with embodiment 1 is only that the mass ratio of low form nitrile rubber and gutta percha is in the embodiment
3.8:1.
Embodiment 14
Difference with embodiment 13 is only that, is shaped in the present embodiment by being pressed and molded, upper mold temperature in compression molding
Degree is 180 DEG C, and lower die temperature is 175 DEG C, molding time 180s；Post-cure processing is carried out after compression molding, at post-cure
The temperature of reason is 140 DEG C, vulcanization time 100min.
Embodiment 15
Difference with embodiment 1 is only that the mass ratio of low form nitrile rubber and gutta percha is in the embodiment
5.2:1.
Embodiment 16
Difference with embodiment 15 is only that, is shaped in the present embodiment by being pressed and molded, upper mold temperature in compression molding
Degree is 180 DEG C, and lower die temperature is 175 DEG C, molding time 180s；Post-cure processing is carried out after compression molding, at post-cure
The temperature of reason is 140 DEG C, vulcanization time 100min.
Embodiment 17
Difference with embodiment 1 is only that, during the preparation process that high glue powder is not added in the embodiment.
Embodiment 18
Difference with embodiment 17 is only that, is shaped in the present embodiment by being pressed and molded, upper mold temperature in compression molding
Degree is 180 DEG C, and lower die temperature is 175 DEG C, molding time 180s；Post-cure processing is carried out after compression molding, at post-cure
The temperature of reason is 140 DEG C, vulcanization time 100min.
Comparative example 1
For common commercially available sealing ring in the prior art.
Comparative example 2
Difference with embodiment 1 is only that, is not added with gutta percha in the comparative example.
Comparative example 3
Difference with embodiment 1 is only that, is not added with abaca fibre in the comparative example.
Comparative example 4
Difference with embodiment 1 is only that, is not added with modified carbon nano-tube in the comparative example.
Comparative example 5
Difference with embodiment 1 is only that, is not added with carbon black in the comparative example.
Sealing ring in embodiment 1-16 and comparative example 1-5 is tested for the property, test result is as shown in table 2.
Table 2: the performance test of embodiment 1-12 and the sealing ring in comparative example 1-5
In conclusion sealing ring compatibility of the present invention is reasonable, processing technology is simple and easy, the sealing ring processed have compared with
It is good intensity, wearability, anti-extrusion.Sealing ring compatibility of the present invention is reasonable, is especially added to gutta percha, abaca fibre, increasing
Modeling agent and modified carbon nano-tube, the carbon black of compounding, the age resister of compounding, compounding vulcanizing agent further improve sealing ring
Comprehensive performance.
Specific embodiment described in the present invention only illustrate the spirit of the present invention by way of example.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
It is skilled to this field although present invention has been described in detail and some specific embodiments have been cited
For technical staff, as long as it is obvious for can making various changes or correct without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of sealing ring, which is characterized in that the sealing ring includes the ingredient of following parts by weight:
Low form nitrile rubber: 80-100 parts
Carbon black: 50-100 parts
Gutta percha: 15-25 parts
Plasticizer: 5-15 parts
Abaca fibre: 10-15 parts
Modified carbon nano-tube: 2-5 parts
Organic zinc: 2-8 parts
Age resister: 8-12 parts
Vulcanizing agent: 3-8 parts.
2. sealing ring according to claim 1, which is characterized in that the matter of the low form nitrile rubber and gutta percha
Amount is than being (4-5): 1.
3. sealing ring according to claim 1, which is characterized in that the carbon black is the mixed of carbon black N990 and carbon black N550
Object is closed, the mass ratio of the carbon black N990 and carbon black N550 is (1-3): 1.
4. sealing ring according to claim 3, which is characterized in that the carbon black N990 is that maleic anhydride is grafted to charcoal
The carbon black N990 that the black surface N990 obtains.
5. sealing ring according to claim 1, which is characterized in that the plasticizer is environment-friendly low-temperature type plasticizer TP-
90B, rubber antioxidant, antioxidant 445 mixture, three accounts for 40-50%, 30-40% and 10- of mixture respectively
20%.
6. a kind of processing method of sealing ring, which is characterized in that the processing method includes claiming by ingredient described in claim 1
Take raw material, blanking, one section of mixing, two-stage mixing, molding, blanking sequence is followed successively by low form nitrile rubber, gutta percha, organic
Zinc, plasticizer, age resister, abaca fibre, carbon black, modified carbon nano-tube, vulcanizing agent；One section of mixing carries out in mixer,
Rotor speed 40-45r.min-1, 35-38 DEG C of cooling water, pressure pressure 0.8-1.2MPa, fill factor 0.75, slice after dumping
Park 5-8h；Two-stage mixing carries out in open mill, and roller temperature is 55-70 DEG C, mixing time 300-480s.
7. the processing method of sealing ring according to claim 6, which is characterized in that be also added into matter when one section of mixing
Amount is the high glue powder of sealing ring quality 2.5-3.7%.
8. the processing method of sealing ring according to claim 6, which is characterized in that described is shaped to be injection moulded, note
Penetrating injection pressure in molding is 1.52-1.82 × 103KN, sulfide stress are 1.92-2.05 × 103KN, vulcanization time 60-
100s。
9. the processing method of sealing ring according to claim 6, which is characterized in that the molding can be to be molded into
Type, upper mold temperature is 180-185 DEG C in compression molding, and lower die temperature is 175-180 DEG C, molding time 120-180s.
10. the processing method of sealing ring according to claim 7, which is characterized in that after compression molding further include secondary
Vulcanizing treatment, the temperature of post-cure processing are 130-140 DEG C, vulcanization time 90-120min.
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| CN201811391477.1A CN109535510A (en) | 2018-11-21 | 2018-11-21 | A kind of sealing ring |
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| CN110356539A (en) * | 2019-06-18 | 2019-10-22 | 镇江市逸帆航空部件有限公司 | One kind being used for aircraft combined type damping sheet window border structure and its installation method |
| CN113527774A (en) * | 2020-04-16 | 2021-10-22 | 上海弗兆实业有限公司 | Processing technology of rubber sealing ring |
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