CN106945313A - The outer silica gel tube preparation method of fluorine in a kind of short fiber reinforced silica gel - Google Patents
The outer silica gel tube preparation method of fluorine in a kind of short fiber reinforced silica gel Download PDFInfo
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- CN106945313A CN106945313A CN201710117893.1A CN201710117893A CN106945313A CN 106945313 A CN106945313 A CN 106945313A CN 201710117893 A CN201710117893 A CN 201710117893A CN 106945313 A CN106945313 A CN 106945313A
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- silica gel
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- fluorine
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- fiber reinforced
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- 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
-
- 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
Abstract
The outer silica gel tube preparation method of fluorine, belongs to silicone tube technical field in a kind of short fiber reinforced silica gel.The various materials wanted needed for various silicone rubber formulations are weighed according to the ratio of formula, silicon rubber in addition to vulcanizing agent, various dispensings and treated aramid fiber pulp input banbury are kneaded, by the silicon rubber kneaded park after 24h mill add vulcanizing agent kneaded again, rolling out film；The various materials wanted needed for various fluorine glue rubber compoundings are weighed according to the ratio of formula, is kneaded uniformly on rubber mixing machine, parks rolling out film after 24 hours；The product for completing shaping is put into vulcanizing tank and carries out one step cure, the outer membrane of dismantling of the demoulding after the step is completed and carries out post vulcanization, complete after whole shaping, cleaning crop processing is carried out, it is to be tested it is qualified after just can be with packaging and storage.
Description
Technical field
The present invention relates to silica gel tube preparation method outside fluorine in a kind of short fiber reinforced silica gel, belong to silicone tube technical field.
Background technology
With the development and increasingly harsher environmental requirement of auto industry, automobile engine in medium and environment using containing
Oil and the burning gases of containing alcohol enter whole engine system by crankcase bleed pipe.Although engine generally takes oil gas
Isolation technics, gs-oil separator is divided into two classes, and a class is open architecture, and another kind of is closed type structure, and open architecture, which refers to, not to be separated
Oil gas directly discharge, whole gas handling system is not entered back into, and the unsegregated oil gas of closed type structure is not discharged directly,
Whole gas handling system need to be re-circulated into, what the 1.3T turbocharged engines that such as lucky FE-3/4 vehicles are used were used is exactly
The oil gas that enclosed Oil-gas Separation technology, i.e. crankcase system are produced passes through air filter outlet sebific duct again after gs-oil separator
Enter back into engine aspirating system.Gs-oil separator isolation technics differs, and separating effect is too different, wherein domestic oil gas
Separator separating effect is preferably only capable of reaching 50%, and external such as Bosch oil-producing gas separating device separating effect can reach
80%, i.e., still there are 20%~50% oil-containing gases to be re-circulated into gas handling system, to avoid the direct discharge of most oil gas
And pollute environment.The air inlet of automobile engine with turbocharger and outlet ICS intercooler system, typically by air filter, turbine
The components such as booster, charge air cooler and its connecting line are constituted, and air delivering pipeline must use rubber tube with steel pipe or rubber tube with blowing
Modeling pipe or the blowing pipe connection directly with ripple, the blowing good pliability of pipe by rubber or with ripple with it is damping, both
Pipe-line layout and assembling can be facilitated, the ability of air delivering pipeline system buffer vibration can be significantly improved again.Fresh air passes through sky
After air cleaner filters and is turbocharger supercharged, dielectric gas it is compressed can temperature rise by a relatively large margin, temperature is typically up to 150
DEG C~200 DEG C between, but for the engine of high supercharging pressure level, gas temperature can be more than 200 DEG C, or even up to more than 220 DEG C.
Gas medium drops to less than 60 DEG C again after being cooled down through charge air cooler, so as to improve the density of fresh air, inhales engine
Enter more air, and more fuel oils can be sprayed into, promote burning more abundant, reach reduction fuel consumption and discharge, improve
The purpose of engine power, and the oil gas in pipe-line system is appeared in, sky can be quickly evaporate into the pipeline of traditional silicon rubber
In gas, air pollution, oil and gas loss are caused.
The outer silicone tube of interior fluorine pastes forming method using multilayer bag, and production process is more, takes up an area big, and equipment investment is high, efficiency is low,
Product size stability is poor, and outward appearance is not good, and leftover pieces ratio is high, reclaims labor intensity greatly, efficiency is low.After this technology, into
Type method can be reduced to individual layer or double-deck bag patch, it might even be possible to which extrusion molding, production efficiency is improved, moreover it is possible to save multiple roll calendering
Machine, reduces equipment cost, and product size stability is improved, appearance investigation, does not have fabric directly to reclaim again in leftover pieces sharp
With
Internal generation enhancing mutually increases with remaining matrix composition in-situ composite or fento in homogeneous material process
The technology of strong composite is referred to as In-sltu reinforcement technology.Early in the seventies, Getson and Adams, Lewis etc. are just reported certainly
Under being acted on by base initiator, the situ-formed graft fibrous organic polymeric on organosiloxane.Keller is reported in silicon rubber
Situ generates the technology of polypropylene fibre.The eighties, Yamamoto is newly controlled, Gu Yuan is proposed in the generation of natural rubber situ according to husband etc.
The technology of ultra-fine nylon short fibre.The processing characteristics of the chopped fiber masterbatch generated with this technology is very excellent, in many glue
Product can be used.Using In-sltu reinforcement technology, short fibre in conventional staple rubber composite process can be overcome
The problems such as difficult scattered, easy fracture of dimension and fiber and bad rubber adhesion, and the characteristic of In-sltu reinforcement fiber also has material
Excellent physical property.Therefore, In-sltu reinforcement technology is a developing direction of composite.
The improvement of fuel performance, plays great role, Japan is after USA and Europe, light since 1997 to reducing discharge
Sulfur content in oil drops to less than 0.05%, and the sulfate in pm emission is greatly reduced with this, while reducing what EGR was caused
The erosion corrosion and catalyst poisoning of engine interior；Sulfur content is further reduced, Cetane number is improved, can further reduce
NOx.Aromatic hydrocarbon is reduced, aromatic components more than 3 rings is especially reduced, the sulfide in pm emission can be reduced, reduced
90% vapo(u)rizing temperature, improve ignition performance；By using oxygenated fuel or additive, it is possible to decrease black smoke particle.In order to adapt to
Low-sulfur and injection pressure are greatly increased, it is ensured that the lubricity of fuel injection equipment (FIE), and improvement exploitation of the people to fuel is expressed
It is very big to expect.
Current Automobile Rubber Products, in addition to tire, mainly including sebific duct, transmission belt, air bag, damper, close
Sealing and sealing strip, and the big classification of inside/outside decorative material seven.Their safety and comfort nearly all with automobile, energy-saving and environmental protection breath
Manner of breathing is closed, and belongs to typical high-performance, high value added product, and the direction towards variation, functionalization is advanced.
Silicon rubber is most representational heat-resisting arctic rubber, can the long-term work at a temperature of -60~250 DEG C, and have
It is good insulate, resistance to ozone, fire resistance.Have the disadvantage that mechanical strength is very low, only the 1/5 of NR, and air-tightness is poor.Silicon rubber
Shared ratio is 2%~3% in automobile glue, is used primarily in the side such as O rings, barrier film, pad, sheath, sebific duct and electric wire
Face, and have point of non-oil resistant and oil resistant.
Silicon rubber market common are vinylsiloxane rubber, methyl silicone rubber, and property is obtained by introducing composition
Modified silicon rubber kind：The penylene methyl and vinyl methyl silicon rubber of diphenyl siloxane are such as introduced, with more preferably resistance to low
Warm nature energy, remains to keep flexibility at -100 DEG C.The VMQ for introducing β-cyanoethyl is referred to as nitrile silicone rubber (NVMQ), with oil resistant
Property, it can be used to manufacture the rubber parts of heat-resisting oil resistant.BVMQ (carbon boron-silicon rubber) newly developed heat resisting temperature is up to 400 DEG C,
For the heat-resisting king of rubber.The trifluoro propyl vinyl methyl silicon rubber (FVMQ) for having silicon rubber and fluorubber feature concurrently is greatly improved
The shortcoming of fluorubber lower temperature resistance difference, as the kind most gazed in specific rubber.Temperature tolerance by -60~230 DEG C,
Heat-resisting, cold-resistant, the oil resistant product such as dynamic static seal resistant to chemical etching and sebific duct, electric wire again can be manufactured with it, can also be given birth to
Produce fluid sealant and adhesive.
The most heat-resisting and oil resistant kind in fluorubber system rubber, price is also the most expensive, and global annual production is about at 30,000 tons
Left and right.At present have 2/3 be used in automobile in terms of, about automobile rubber less than 2%.Fluorubber is mainly used to solve car engine
Traditional NBR, the ACM occurred after machine high temperature and fuel hybridization can not be adapted at all, it is necessary to more heat-resisting, oil resistant
The problem of new type rubber is upgraded.The automobile rubber part manufactured with fluorubber, plays property retention 1 at -20~200 DEG C
More than ten thousand hours, maximum operating temperature can resist aliphatic hydrocarbon and aromatic hydrocarbon oils and high corrosion soda acid up to more than 300 DEG C
Learn medium and corrosion.
Fluorubber species also has a lot, F K M be fluorubber in most representational product, oil resistant, it is heat-resisting, ageing-resistant,
Compression resistant morphotropism is good.F240 is the trimer of vinylidene, tetrafluoroethene and perfluorinated methyl ethylene ether.Du Pont is included in F
The dimension of series leads to G types, there is G LT, G F LT etc..Better than F-2 6, with more preferable cold resistance and chemical proofing, can-
Long-term work under the conditions of 50~300 DEG C, the in the car rubber soft for requiring low temperature.
Automobile turbocharger technology is abroad using more ripe, at home or a more advanced new technology,
The material that wherein turbocharger air inlet/outlet rubber hose early stage selects abroad is mainly ethylene-acrylate (AEM), with silicon rubber
The development of glue technology, with the birth of oil resistance and the more preferable fluorosioloxane rubber of heat resistance, on turbocharger sebific duct
Also more and more extensively, particularly in American-European countries, turbocharger sebific duct is largely changed to the outer silicon of interior fluorine for the application of fluorosioloxane rubber
Sebific duct structure.
Due to the environmental protection and energy saving feature that turbocharging technology has had, domestic passenger car producer releases independent research one after another
Passenger car vehicle with turbocharger, while country, which also requires each automobile factory, must release certain fuel-efficient vehicle.Such as
Shanghai passenger car, Chongqing Chang'an Automobile Co., Ltd, Changcheng Automobile Co., Ltd., a vapour car share are because of company etc.
All applied etc. large quantities of producers on automobile carrying out or be ready for turbocharging technology, the need of such turbocharger sebific duct
Asking to increase.
At present because China's turbocharging technology development relatively falls behind, the turbocharger sebific duct technology supporting with it
Relatively poor, joint brand turbocharger sebific duct relies primarily on import.With the fast development of domestic automobile industry, turbine increases
The demand of depressor sebific duct can be increasing.Development turbocharger sebific duct is the developing direction of responsive motor, with wide hair
Exhibition prospect and market.
As automobile is to Comfortable attractive, the development in energy-conserving and environment-protective direction, technology for Turbocharger Manufacturing is more and more universal in application,
Simultaneously with the raising of automobile environment-protection emission request, unburned complete fuel oil-gas is returned to gas handling system so that turbine increases
The heatproof of depressor sebific duct, oil resistance more and more higher.Description by each auto vendor to turbocharger sebific duct：Use environment
Temperature -40~+180 DEG C, peak temperature reaches 200 DEG C, and internal ventilation pressure is not more than 0.35Mpa, and burst pressure is not less than
1Mpa。
By analyzing the technical requirements：Usual silicone rubber has good high and low temperature resistance, its temperature in use
Can be one of best elastomeric material of heat resistance from -55~+200 DEG C, but silicon rubber intermolecular distance is big, resistance to gas is saturating
The property crossed is poor, and such as silica gel is 25 times of natural rubber to the permeability of oxygen, is 429 times of butyl rubber, is the 100 of fluoropolymer
Times.The oil resistance of silicon rubber is poor simultaneously, and particularly heat-resistant oil performance is poor, and traditional common silicone tube can not meet turbine increasing
The oil resistance requirement of depressor sebific duct.
Ethylene-acrylate rubber (AEM) has preferable heat resistance and oil resistance, but its temperature in use -30
~+170 DEG C, limiting temperature is no more than 175 DEG C, and its material property reaches using substantially for automobile turbocharger sebific duct reluctantly
It is required that.But it is long-term using the phenomenon that colloid is hardened occurs, influence the sealing property and damping performance of product, the quality problems
All there are similar quality problems in different auto vendors.Simultaneously because its material characteristics, the sebific duct is usually by one layer of skeleton
Enhancement layer is constituted, and its burst pressure typically only has 0.7Mpa or so, and its safety coefficient is smaller, early stage booster phenomenon easily occurs.
It seems that simple traditional usual silicone rubber and ethylene-acrylate rubber (AEM) are difficult to meet modern turbine to increase
The technical requirements of depressor sebific duct.Seek a kind of oil resistance that can meet turbocharger sebific duct and high-temperature oil gas permeance property
It is required that, heat resistance requirement is met again, while also wanting a kind of economical and practical sebific duct to be used as turbocharger sebific duct.
The content of the invention
In order to overcome the deficiencies in the prior art, the present invention provides fluorine in short fiber reinforced silica gel outer silica gel tube preparation method,
A kind of oil resistance that can meet turbocharger sebific duct and the requirement of high-temperature oil gas permeance property, meet heat resistance requirement again
With it is economical and practical.
By the way that to sebific duct use environment and desired analysis, oil resistance is just for rubber tube inner wall Zeng Eryan, temperature tolerance
Can be that sebific duct is integrally required, in line with the principle for improving end properties and reduction production cost, the present invention, which is selected, has oil resistance
Fluorubber (FKM) with heat resistance is as sebific duct hose lining, and outer glue uses the good silicon rubber of heat resistance,
The present invention makes the short fine cloth that substitutes as the enhanced mode of framework material, taken using short fibre is directly mixed in silica gel
Disappeared wiper rolling equipment and process, and only the lower-cost two-roll calendar of need just can be so that province's equipment and process, lower cost are carried
High efficiency.
The outer silicon car sebific duct preparation method of fluorine, contains following steps in a kind of short fiber reinforced silica gel；
Step 1, the various materials wanted needed for silicone rubber formulations are weighed according to the ratio of formula, except vulcanizing agent
Outer silicon rubber, various dispensings and treated aramid fiber pulp input banbury is kneaded, by the silicon rubber kneaded
Glue parked and kneaded again in mill addition vulcanizing agent after 24h, rolling out film.
Step 2, the various materials wanted needed for fluorine glue rubber compounding are weighed according to the ratio of formula, on rubber mixing machine
Mixing is uniform, parks rolling out film after 24 hours.
Step 3, the mould for taking Related product, after cleaning is carried out, by the semi-finished product sheet material cut out according to task instruction
The requirement of book carries out shaping work.
Step 4, the product for completing shaping is put into vulcanizing tank carries out one step cure, complete to be stripped and dismantle after the step
Outer membrane carries out post vulcanization, completes after whole shaping, carries out cleaning crop processing, it is to be tested it is qualified after can just be packaged into
Storehouse.
The outer silica gel tube preparation method of fluorine, also contains following steps in a kind of short fiber reinforced silica gel；
Fiber strength step；
Dispersion steps：Mechanical shearing disperses；
Adhesion step：Using the solution (ROHM AND HAAS 305 of ROHM AND HAAS 305：Industrial alcohol is 1:Or Kai Muluoke 8)
(industrial alcohol of Kai Muluoke 608 is 1 to 608 solution:8) immersion treatment fiber；
Mixing step:When being mixed with mill, it should be decided whether to carry out rubber first according to the size of rubber plasticity
Plasticate；Mixing charging sequence is few rubber, consumption and difficult scattered auxiliary agent, chopped fiber, finally plus vulcanizing agent.
Dispersion steps include：
Dispersion process includes the process that the fibre bundle of coalescence is divided into single fiber；
The method that shearing force is improved using increase inherent viscosity.
Dispersion steps be included in rubber first add granulated filler added to improve system viscosity, then chopped fiber mix
Refining；The mill that should stop if necessary carries out cutting operation, to ensure the constant orientation of safe operation and chopped fiber；
First mended and refined with mill again with mixer mixing, make fiber-wall-element model.
Adhesion step includes；For the adhesion problem of fluorine glue inside lining layer and silastic-layer, because the property at interface is different, two
The special processing method of person's bonding needs and adhesive；
Raw material are selected：Fluorubber, p-aramid fiber chopped fiber pulp, DBPH, age resistor ODA, carbon black, light MgO, dioxy
Change titanium, Ca (OH) 2, Tissuemat E, stearic acid, particular adhesive (alkoxy silane containing amino and the alkoxy containing vinyl
The oligomer of silane).
Adhesion step improves including interfacial adhesion；
In order to increase the bonding force between inner glue layer and outer glue-line, one layer of transition zone of increase in the middle of two layers so that interlayer glues
Close and reached more than 2N/mm.
It is an advantage of the invention that individual layer or double-deck bag patch can be reduced to, it might even be possible to which extrusion molding, production efficiency is improved,
Multi-rolling mill can also be saved, equipment cost is reduced, product size stability is improved, appearance investigation, does not have fabric in leftover pieces
Can directly recycling.
The short fine modified enhancing silicon rubber of aramid fiber of the present invention just has sizable advantage in terms of production cost material cost；
Abundant mixing, which obtains elastomeric compound, in the aramid fiber pulp obtained by surface treatment, addition silica gel can have very
Good mechanical property, product can do framework material without using fabric, therefore eliminate traditional patch technique, improve life
Efficiency is produced, because not using fabric, cost is also reduced to a certain degree.
The present invention solves the viscous of sebific duct transition zone and inner liner using special compounding agent and new sebific duct structure design
Conjunction problem.
The features such as present invention is with excellent high-low temperature resistant, media-resistant, weatherability, oil resistivity, extremely low gas permeability,
And greatling save cost, its cost performance that overflows, which is expected to lead car to enter outlet system with multichannel, steps into the silica gel epoch outside interior fluorine.
This technology can not only increase substantially car and enter the reliability and service life of outlet system, while automobile making can be reduced
Cost, and resource is saved, it is also the direction that car enters on outlet system pipeline with significant economic benefit and social benefit
Property product.The present invention not only substantially increases the combination property of sebific duct, adds the service life of sebific duct, and because using short fibre
Dimension instead of aramid fabric of the price for more than 10 times of nylon eyelet fabric, and same pipe, chopped fiber amount ratio aramid fabric will less together
When simplify production technology, can comprehensively reduce by 80% cost.
The present invention can be substituted in any various types of vehicles with turbine-middle air-cooled structure completely, in the correlation production developed
On the basis of product, with reference to the specific product behaviour in service of each passenger car client, bulk, bear pressure situations such as coordinate related
Passenger car client carries out applying design, cold air inlet/outlet rubber hose in the AEM of traditional structure can be substituted comprehensively completely, with very wide
Wealthy application prospect.
Brief description of the drawings
When considered in conjunction with the accompanying drawings, by referring to following detailed description, can more completely more fully understand the present invention with
And the adjoint advantage of many of which is easily learnt, but accompanying drawing described herein is used for providing a further understanding of the present invention,
The part of the present invention is constituted, schematic description and description of the invention is used to explain the present invention, do not constituted to this hair
Bright improper restriction, such as figure are wherein：
Fig. 1 is schematic flow sheet of the invention.
Fig. 2 is structural representation of the invention.
The present invention is further described with reference to the accompanying drawings and examples.
Embodiment
Obviously, those skilled in the art belong to the guarantor of the present invention based on many modifications and variations that spirit of the invention is done
Protect scope.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is individual ", " described " and "the" may also comprise plural form.It is to be further understood that what is used in the specification of the present invention arranges
Diction " comprising " refer to there is the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or during " coupled " to another element, and it can be directly connected or coupled to other elements, or can also exist
Intermediary element.In addition, " connection " used herein or " coupling " can include wireless connection or coupling.Wording used herein
"and/or" includes one or more associated any cells for listing item and all combined.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific terminology) with the general understanding identical meaning with the those of ordinary skill in art of the present invention.Should also
Understand, those terms defined in such as general dictionary, which should be understood that, to be had and the meaning in the context of prior art
The consistent meaning of justice, and unless defined as here, will not be explained with idealization or excessively formal implication.
Embodiment 1：
As shown in Figure 1 and Figure 2, the outer silica gel tube preparation method of fluorine in a kind of short fiber reinforced silica gel,
A kind of outer silicone tube of fluorine in short fiber reinforced silica gel, structure is as shown in Figure 2：Inner glue layer 1, transition glue-line 2 covers glue and added
Strong layer 3, outer glue-line 4.
The outer silica gel tube material selection of fluorine is as follows in silicon rubber charge air cooler：Fluorine glue, silica gel, the p-aramid fiber fluff pulp dregs of rice, double two
Five vulcanizing agent DBPH, age resistor ODA, carbon black, light MgO, titanium dioxide, Ca (OH)2, Tissuemat E；It is stearic acid, CTP, special
Adhesive (oligomer of the alkoxy silane containing amino and the alkoxy silane containing vinyl).
The outer silica gel tube preparation method of fluorine, contains following steps in a kind of short fiber reinforced silica gel；
Fiber strength step；
Dispersion steps：Mechanical shearing disperses；
Adhesion step：ROHM AND HAAS 305 or the adhesive treatment fibers of Kai Muluoke 608；
Mixing step:When being mixed with mill, it should be decided whether to carry out rubber first according to the size of rubber plasticity
Plasticate.Mixing charging sequence is few rubber, consumption and difficult scattered auxiliary agent, chopped fiber, finally plus vulcanizing agent.
Dispersion process includes the process that the fibre bundle of coalescence is divided into single fiber, therefore needs certain shearing force ability
Separate fibre bundle.
Reduce roll spacing or improve roller speed than helping to increase shearing force, improve dispersion effect, but for fragile fibre, should also
Take into account the fracture of fiber in mixing process.In addition, the method that also shearing force can be improved using increase inherent viscosity.
Granulated filler is first added in rubber chopped fiber mixing is added to improve system viscosity, then.
Increased with chopped fiber amount during mill mixing with addition, the turning refining of sizing material, cutter are difficult all the more, should stop if necessary
Lower mill carries out cutting operation, to ensure the constant orientation of safe operation and chopped fiber.
Banbury has high shear rate, can improve dispersion effect and reduce labor intensity, improves work situation.But
Fibre length decline is likely to result in, while fiber can not be also orientated.First mended and refined with mill again with mixer mixing, take fiber
To preferable effect can be obtained.
It should be noted that in mixing process, because the effect of shearing force inevitably causes aramid fiber short fibre
Fracture, shearing force is bigger, and mixing time is longer, is broken more serious.
Adhesion step；For the adhesion problem of fluorine glue inside lining layer and silastic-layer, because the property at interface is different, the two glues
Close the special processing method of needs and adhesive.
Raw material are selected：Fluorubber, p-aramid fiber chopped fiber pulp, DBPH, age resistor ODA, carbon black, light MgO, dioxy
Change titanium, Ca (OH) 2, Tissuemat E, stearic acid, particular adhesive (alkoxy silane containing amino and the alkoxy containing vinyl
The oligomer of silane).
Material property standard and end properties：
By the comparative analysis required each auto vendor's turbocharger sebific duct, the outer silicone tube skill of fluorine in turbocharger
Art requirement such as following table：
The outer silica gel tube material of fluorine and finished product technical requirements in the turbocharger of table 1
It is as follows that Fiber strength step includes aramid fiber short fibre surface modification：
Scattered bad ppta-pulp fibre is entangled to form accumulation and hole, not only results in composite and breaks
It is bad, and due to reducing the contact area with base rubber, the interface cohesion that can weaken fiber and base rubber is acted on；Simultaneously
Because the superfine fibre of entanglement can not well be stretched and is orientated, contribution of the Fiber Aspect Ratio to Short Fiber Reinforcement is reduced.
Due to architectural feature, when being kneaded with base rubber entanglement, which easily occurs, for not pretreated ppta-pulp fibre causes
Difficulties in dispersion, can not play the reinforcement potentiality of high-performance ppta-pulp fibre.Different from the rubber master batch predispersion skill of E.I.Du Pont Company
Art, the Fanglun slurry cake predispersion of use is free of is isolated agent and dispersant is effective between polymers compositions, ppta-pulp fibre
Isolation, interleaving agent and dispersant can thoroughly soak and isolate Fanglun slurry cake trunk fiber and superfine fibre, between reduction fiber
Polarity active force and clinging tendency during with compounding rubber, be conducive to fiber scattered in base rubber.
Adhesion step improves including interfacial adhesion；
In order to increase the bonding force between inner glue layer and outer glue-line, one layer of transition zone of increase in the middle of two layers so that interlayer glues
Close and reached more than 2N/mm.
As described above, being explained to embodiments of the invention, as long as but essentially without this hair of disengaging
Bright inventive point and effect can have many deformations, and this will be readily apparent to persons skilled in the art.Therefore, this
The variation of sample is also integrally incorporated within protection scope of the present invention.
Claims (6)
1. the outer silica gel tube preparation method of fluorine in a kind of short fiber reinforced silica gel, it is characterised in that contain following steps；
Step 1, the various materials wanted needed for silicone rubber formulations are weighed according to the ratio of formula, in addition to vulcanizing agent
Silicon rubber, various dispensings and treated aramid fiber pulp input banbury are kneaded, and the silicon rubber kneaded is stopped
Put and kneaded again in mill addition vulcanizing agent after 24h, rolling out film；
Step 2, the various materials wanted needed for fluorine glue rubber compounding are weighed according to the ratio of formula, kneaded on rubber mixing machine
Uniformly, rolling out film after 24 hours is parked；
Step 3, the mould for taking Related product, after cleaning is carried out, by the semi-finished product sheet material cut out according to job instruction
It is required that carrying out shaping work；
Step 4, the product for being molded completion are put into vulcanizing tank and carry out one step cure, complete to be stripped outer layer of dismantling after the step
Film carries out post vulcanization, completes after whole shaping, carries out cleaning crop processing, it is to be tested it is qualified after just can be with packaging and storage
.
2. the outer silica gel tube preparation method of fluorine in a kind of short fiber reinforced silica gel according to claim 1, it is characterised in that also
Contain following steps；
Fiber strength step；
Dispersion steps：Mechanical shearing disperses；
Adhesion step：ROHM AND HAAS 305 or the adhesive treatment fibers of Kai Muluoke 608；
Mixing step:When being mixed with mill, it should decide whether to plasticate to rubber according to the size of rubber plasticity first；
Mixing charging sequence is few rubber, consumption and difficult scattered auxiliary agent, chopped fiber, finally plus vulcanizing agent.
3. the outer silica gel tube preparation method of fluorine in a kind of short fiber reinforced silica gel according to claim 2, it is characterised in that point
Stroll includes suddenly：
Dispersion process includes the process that the fibre bundle of coalescence is divided into single fiber；
The method that shearing force is improved using increase inherent viscosity.
4. the outer silica gel tube preparation method of fluorine in a kind of short fiber reinforced silica gel according to claim 3, it is characterised in that point
Take a walk it is rapid be included in rubber first add granulated filler chopped fiber mixing added to improve system viscosity, then；If necessary
The mill that should stop carries out cutting operation, to ensure the constant orientation of safe operation and chopped fiber；
First mended and refined with mill again with mixer mixing, make fiber-wall-element model.
5. the outer silica gel tube preparation method of fluorine in a kind of short fiber reinforced silica gel according to claim 2, it is characterised in that viscous
Closing step includes；For the adhesion problem of fluorine glue inside lining layer and silastic-layer, because the property at interface is different, the two bonding needs
Special processing method and adhesive；
Raw material are selected：Fluorubber, p-aramid fiber chopped fiber pulp, DBPH, age resistor ODA, carbon black, light MgO, titanium dioxide
Titanium, Ca (OH) 2, Tissuemat E, stearic acid.
6. the outer silica gel tube preparation method of fluorine in a kind of short fiber reinforced silica gel according to claim 2, it is characterised in that viscous
Close step improves including interfacial adhesion；
In order to increase the bonding force between inner glue layer and outer glue-line, one layer of transition zone of increase in the middle of two layers so that ply adhesion
Reach more than 2N/mm.
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