CN106945313B - 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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- CN106945313B CN106945313B CN201710117893.1A CN201710117893A CN106945313B CN 106945313 B CN106945313 B CN 106945313B CN 201710117893 A CN201710117893 A CN 201710117893A CN 106945313 B CN106945313 B CN 106945313B
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- 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
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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
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.A variety of materials required in various silicone rubber formulations are weighed according to the ratio of formula, silicon rubber, various ingredients and treated aramid fiber pulp investment mixer other than vulcanizing agent is kneaded, vulcanizing agent is added in open mill after the silicon rubber being kneaded is parked for 24 hours to be kneaded again, rolling out film；Required a variety of materials in various fluorine glue rubber compoundings are weighed according to the ratio of formula, is kneaded uniformly on rubber mixing machine, parks 24 hours post-calendering slices；It will complete molding product and be put into vulcanizing tank progress one step cure, complete to demould outer membrane progress post vulcanization of dismantling after the step, after the entire molding of completion, carry out cleaning cutting head and handle, can be packed and stored after passing the inspection.
Description
Technical field
The present invention relates to silica gel tube preparation methods outside fluorine in a kind of short fiber reinforced silica gel, belong to silicone tube technical field.
Background technique
With the development of the automobile industry and increasingly harsher environmental requirement, automobile engine in medium and environment using containing
Oil and the burning gases of alcohol-containing pass through crankcase bleed pipe and enter entire engine system.Although engine generally takes oil gas
Isolation technics, gs-oil separator are divided into two classes, and one kind is open architecture, and another kind of is closed type structure, and open architecture, which refers to, not to be separated
Oil gas be direct emission, do not enter back into entire gas handling system, and the unsegregated oil gas of closed type structure does not have direct emission,
Need to be re-circulated into entire gas handling system, such as the 1.3T turbocharged engine that uses of lucky FE-3/4 vehicle use be exactly
The oil gas that enclosed oil gas isolation technics, i.e. crankcase system generate passes through air cleaner outlet sebific duct again after gs-oil separator
Enter back into engine aspirating system.Gs-oil separator isolation technics is different, separating effect be it 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 that will be re-circulated into gas handling system, to avoid the direct emission of most oil gas
And pollute environment.The air inlet of automobile engine with turbocharger and outlet ICS intercooler system, generally by air cleaner, turbine
The components such as booster, intercooler and its connecting line composition, air delivering pipeline must using rubber tube and steel pipe or rubber tube with blow
Modeling pipe or blow molding pipe connection directly with ripple, the good flexibility of blow molding pipe by rubber or with ripple with it is damping, both
It can be convenient pipe-line layout and assembly, and the ability of air delivering pipeline system buffer vibration can be significantly improved.Fresh air passes through sky
After air cleaner filters and is turbocharger supercharged, dielectric gas is generally up to 150 through compression meeting temperature rise by a relatively large margin, temperature
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 220 DEG C or more.
Gas medium drops to 60 DEG C hereinafter, to improve the density of fresh air again after intercooler is cooling, inhales engine
Into more air, and more fuel oils can be sprayed into, promote burning more abundant, reaching reduces fuel consumption and discharge, improves
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 packet, and production process is more, and land occupation is big, and equipment investment is high, low efficiency,
Product size stability is poor, and appearance is bad, and leftover pieces ratio is high, recycles large labor intensity, low efficiency.After this technology, at
Type method can simplify as single or double layer packet patch, it might even be possible to which extrusion molding, production efficiency improve, moreover it is possible to save multiple roll calendering
Machine reduces equipment cost, and product size stability improves, appearance investigation, does not have fabric that can directly recycle again in leftover pieces sharp
With
Internal reinforced phase and the remaining matrix composition in-situ composite or fento of generating increases in homogeneous material process
The technology of strong composite material is known 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
The technology of middle in-situ preparation polypropylene fibre.The eighties, Yamamoto is newly controlled, Gu Yuan is according to the proposition such as husband in-situ preparation in natural rubber
The technology of ultra-fine nylon short fibre.Processing performance with the staple fiber masterbatch of this technology generation is very excellent, in many glue
Product can use.Using In-sltu reinforcement technology, short fibre in conventional staple rubber composite material process can be overcome
The problems such as dimension hardly possible is dispersed, easy fracture and fiber and rubber adhesion are bad, 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 material.
The improvement of fuel performance plays great role to discharge is reduced, and Japan is after USA and Europe, light since 1997
Sulfur content in oil drops to 0.05% hereinafter, the sulfate in pm emission is greatly reduced with this, while reducing caused by EGR
The erosion corrosion and catalyst poisoning of engine interior；It is further reduced sulfur content, Cetane number is improved, can further decrease
NOx.Aromatic hydrocarbon is reduced, the aromatic component of 3 rings or more is especially reduced, the sulfide in pm emission can be reduced, reduced
90% vapo(u)rizing temperature improves ignition performance；By using oxygenated fuel or additive, black smoke particle can be reduced.In order to adapt to
Low-sulfur and injection pressure greatly increase, it is ensured that the lubricity of fuel injection equipment (FIE), people express the improvement exploitation of fuel
Very big expectation.
Current Automobile Rubber Products mainly include sebific duct, transmission belt, air bag, damper, close in addition to tire
Sealing and the big classification of sealing strip and inside/outside decorative material seven.They are nearly all ceased with the safety and comfort of automobile, energy-saving and environmental protection
Manner of breathing closes, and belongs to typical high-performance, high value added product, advances towards the direction of diversification, functionalization.
Silicon rubber is most representative heat-resisting arctic rubber, can be in -60~250 DEG C of at a temperature of long-term work, and is had
Good insulation, resistance to ozone, flame retardant property.The disadvantage is 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 ring, diaphragm, liner, sheath, sebific duct and electric wire
Face, and it is divided into non-oil resistant and oil resistant.
Silicon rubber market common are vinylsiloxane rubber, methyl silicone rubber, obtain property by introducing ingredient
Modified silicon rubber kind: penylene methyl and vinyl methyl silicon rubber as introduced diphenyl siloxane have more preferably resistance to low
Warm nature energy is still able to maintain flexibility at -100 DEG C.It introduces β-cyanoethyl VMQ and is known as nitrile silicone rubber (NVMQ), there is oil resistant
Property, it can be used to manufacture the rubber parts of heat-resisting oil resistant.The heat resisting temperature of BVMQ (carbon boron-silicon rubber) newly developed has been up to 400 DEG C,
For the heat-resisting king of rubber.The trifluoro propyl vinyl methyl silicon rubber (FVMQ) for having both silicon rubber and fluorubber feature greatly improves
The disadvantage of fluorubber lower temperature resistance difference, has become the kind most gazed in specific rubber.Temperature tolerance by -60~230 DEG C,
Heat-resisting, cold-resistant, oil resistant can be manufactured with it and the products such as dynamic static seal and sebific duct, electric wire resistant to chemical etching, can also give birth to
Produce sealant and adhesive.
The most heat-resisting and oil resistant kind in fluorubber system rubber, price is also the most expensive, and global annual output 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.With the automobile rubber part that fluorubber manufactures, elasticity is able to maintain 1 at -20~200 DEG C
Ten thousand hours or more, maximum operating temperature can resist aliphatic hydrocarbon and aromatic hydrocarbon oils and high corrosion soda acid up to 300 DEG C or more
Learn medium and corrosion.
Fluorubber type also has very much, F K M be fluorubber in most representative 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 type, there is G LT, G F LT etc..Better than F-2 6, there is better cold resistance and chemical resistance, can-
Long-term work under the conditions of 50~300 DEG C, in the car for requiring the rubber product of low temperature softness.
Automobile turbocharger technology is more mature in foreign applications, at home or a more advanced new technology,
Wherein turbocharger air inlet/outlet rubber hose early stage is mainly ethylene-acrylate (AEM) in the material that foreign countries select, with silicon rubber
The development of glue technology, with the birth of oil resistance and the better fluorine silicone rubber of heat resistance, on turbocharger sebific duct
The application of fluorine silicone rubber is also more and more extensive, and especially in American-European countries, turbocharger sebific duct is largely changed to the outer silicon of interior fluorine
Sebific duct structure.
Due to the environmental protection and energy saving that turbocharging technology has had the characteristics that, domestic passenger car producer releases independent research one after another
Passenger car vehicle with turbocharger, while country 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.
It is all applied on automobile carrying out or be ready for turbocharging technology etc. large quantities of producers, the need of such turbocharger sebific duct
Asking will increase.
At present since turbocharging technology development in China's relatively falls behind, turbocharger sebific duct technology matched with its
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.Develop the developing direction that turbocharger sebific duct is responsive motor, there is wide hair
Exhibition prospect and market.
As automobile is to Comfortable attractive, the development in energy conservation and environmental protection direction, technology for Turbocharger Manufacturing is more and more common 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 are higher and higher.Description by each auto vendor to turbocharger sebific duct: use environment
Temperature -40~+180 DEG C, peak temperature reach 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, uses temperature
It can be best one of the rubber material of heat resistance from -55~+200 DEG C, however silicon rubber intermolecular distance is big, resistance to gas is saturating
The property crossed is poor, as permeability of the silica gel to oxygen be 25 times of natural rubber, be butyl rubber 429 times, be the 100 of fluoropolymer
Times.The oil resistance of silicon rubber is poor simultaneously, and especially heat-resistant oil performance is poor, and traditional common silicone tube is not able to satisfy turbine increasing
The oil resistance requirement of depressor sebific duct.
Ethylene-acrylate rubber (AEM) has preferable heat resistance and oil resistance, but it uses temperature -30
~+170 DEG C, for limiting temperature no more than 175 DEG C, material property reaches the basic use of automobile turbocharger sebific duct reluctantly
It is required that.But be used for a long time and will appear the phenomenon that colloid is hardened, influence the sealing performance and damping performance of product, the quality problems
All occurred in different auto vendors similar to quality problems.Simultaneously because its material characteristics, which is usually by one layer of skeleton
Enhancement layer composition, burst pressure generally only have 0.7Mpa or so, and safety coefficient is smaller, is easy to appear early stage booster phenomenon.
It seems that simple traditional usual silicone rubber and ethylene-acrylate rubber (AEM) are difficult to meet modern turbine increasing
The technical requirements of depressor sebific duct.Seek a kind of oil resistance and high-temperature oil gas permeance property for being both able to satisfy turbocharger sebific duct
It is required that meeting heat resistance requirement again, while also wanting a kind of economical and practical sebific duct as turbocharger sebific duct.
Summary of the invention
For 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 being not only able to satisfy turbocharger sebific duct and the requirement of high-temperature oil gas permeance property, but also meet heat resistance requirement
With it is economical and practical.
By the analysis to sebific duct use environment and requirement, oil resistance is just for rubber tube inner wall Zeng Eryan, temperature tolerance
It can be that sebific duct integrally requires, in line with improving end properties and reducing the principle of production cost, the present invention, which selects, has oil resistance
The silicon rubber for using heat resistance good as sebific duct hose lining, outer glue with the fluorubber (FKM) of heat resistance,
Using short fibre is directly mixed in silica gel, the mode for enhancing short fine substitution cloth as framework material takes the present invention
Disappeared wiper rolling equipment and process, only needs lower-cost two-roll calendar, saves equipment and process, lower cost mention
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 weighs a variety of materials required in silicone rubber formulations according to the ratio of formula, in addition to vulcanizing agent
Outer silicon rubber, various ingredients and treated aramid fiber pulp investment mixer is kneaded, the silicon rubber that will be kneaded
Glue is added vulcanizing agent in open mill after parking for 24 hours and is kneaded again, rolling out film.
Step 2 weighs required a variety of materials in fluorine glue rubber compounding according to the ratio of formula, on rubber mixing machine
It is kneaded uniformly, parks 24 hours post-calendering slices.
Step 3, the mold for taking Related product, after carrying out cleaning, by the semi-finished product sheet material cut out according to task instruction
The requirement of book carries out shaping work.
Step 4, will complete molding product be put into vulcanizing tank carry out one step cure, complete the step after demould dismantles
Outer membrane carries out post vulcanization, after completing entire molding, carries out cleaning cutting head processing, can be packaged into after passing the inspection
Library.
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 dispersion；
Adhesion step: 305 solution of ROHM AND HAAS (ROHM AND HAAS 305: industrial alcohol 1:8) or Kai Muluoke are used
608 solution (608 industrial alcohol of Kai Muluoke is 1:8) immersion treatment fiber；
Mixing step: when being mixed with open mill, should be decided whether to carry out raw rubber first according to the size of raw rubber plasticity
It plasticates；Being kneaded charging sequence is that rubber, dosage be few and auxiliary agent, the staple fiber of difficult dispersion, finally plus vulcanizing agent.
Dispersion steps include:
Dispersion process includes that the fibre bundle of coalescence is divided into the process of single fiber；
The method for improving shearing force using inherent viscosity is increased.
Dispersion steps, which are included in rubber, is added granulated filler first to improve system viscosity, and it is mixed then to add staple fiber
Refining；The open mill that should stop when necessary carries out cutting operation, to guarantee the constant orientation of safe operation and staple fiber；
It is first mended and is refined with open mill again with mixer mixing, make fiber orientation.
Adhesion step includes；For the adhesion problem of fluorine glue inside lining layer and silastic-layer, since the property at interface is different, two
Person, which bonds, needs special processing method and adhesive；
Raw material selection: fluorubber, p-aramid fiber staple fiber pulp, DBPH, anti-aging agent ODA, carbon black, light MgO, dioxy
Change titanium, Ca (OH) 2, polyethylene wax, stearic acid, particular adhesive (amino-containing alkoxy silane and the alkoxy containing vinyl
The oligomer of silane).
Adhesion step includes that interfacial adhesion improves；
In order to increase the bonding force between inner glue layer and outer glue-line, increase by one layer of transition zone among two layers, so that interlayer is viscous
It has closed and has reached 2N/mm or more.
It is an advantage of the invention that can simplify as single or double layer packet patch, it might even be possible to extrusion molding, production efficiency improve,
Multi-rolling mill can also be saved, equipment cost is reduced, product size stability improves, appearance investigation, does not have fabric in leftover pieces
It can direct recycling and reusing.
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；
By being surface-treated obtained aramid fiber pulp, it is added in silica gel to be sufficiently kneaded and obtains rubber compound and can have very
Good mechanical property, product can do framework material without using fabric, therefore eliminate traditional patch technique, improve life
Produce efficiency also reduces cost because not using fabric to a certain degree.
The present invention solves the viscous of sebific duct transition zone and liner layer using special compounding agent and the design of new sebific duct structure
Conjunction problem.
The present invention has the characteristics that excellent high-low temperature resistant, media-resistant, weatherability, oil resistivity, extremely low gas permeability,
And cost is greatlyd save, the cost performance that overflows is expected to that car is led to step into the silica gel epoch outside interior fluorine with multichannel disengaging gas system.
This technology can not only increase substantially the reliability and service life of car disengaging gas system, while can reduce automobile manufacture
Cost, and resource is saved, with the direction in significant economic benefit and social benefit and car disengaging gas system pipeline
Property product.The present invention not only substantially increases the comprehensive performance of sebific duct, increases the service life of sebific duct, and because using short fibre
The aramid fabric for being 10 times of nylon eyelet fabric or more instead of price is tieed up, same pipe, staple fiber amount ratio aramid fabric will less together
When simplify production technology, can integrate reduce by 80% cost.
The present invention can be substituted completely in any various types of vehicles with the middle air-cooled structure of turbine-, in now developed related production
On the basis of product, in conjunction with the specific product behaviour in service of each passenger car client, bulk, situations such as pressure cooperation correlation is born
Passenger car client carries out that cold air inlet/outlet rubber hose in the AEM of traditional structure can be substituted comprehensively completely using design, has very wide
Wealthy application prospect.
Detailed description of the invention
When considered in conjunction with the accompanying drawings, by referring to following detailed description, the present invention can be more completely and better understood with
And be easy to learn many adjoint advantages, but the drawings described herein are used to provide a further understanding of the present invention,
A part of the invention is constituted, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, does not constitute to this hair
Bright improper restriction is such as schemed wherein:
Fig. 1 is flow diagram of the invention.
Fig. 2 is structural schematic diagram of the invention.
Present invention will be further explained below with reference to the attached drawings and examples.
Specific embodiment
Obviously, those skilled in the art belong to guarantor of the invention based on many modifications and variations that spirit of the invention is done
Protect range.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are 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 when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.Wording used herein
"and/or" includes one or more associated any cells for listing item and all combinations.
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 term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
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,
The outer silicone tube of fluorine, structure are as shown in Figure 2 in a kind of short fiber reinforced silica gel: inner glue layer 1, transition glue-line 2 cover glue and add
Strong layer 3, outer glue-line 4.
The outer silica gel tube material selection of fluorine is as follows in silicon rubber intercooler: fluorine glue, silica gel, the p-aramid fiber fluff pulp dregs of rice, double two
Five vulcanizing agent DBPH, anti-aging agent ODA, carbon black, light MgO, titanium dioxide, Ca (OH)2, polyethylene wax；It is stearic acid, CTP, special
Adhesive (oligomer of amino-containing alkoxy silane 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 dispersion；
Adhesion step: 608 adhesive treatment fiber of ROHM AND HAAS 305 or Kai Muluoke；
Mixing step: when being mixed with open mill, should be decided whether to carry out raw rubber first according to the size of raw rubber plasticity
It plasticates.Being kneaded charging sequence is that rubber, dosage be few and auxiliary agent, the staple fiber of difficult dispersion, finally plus vulcanizing agent.
Dispersion process includes the shearing force ability that the fibre bundle of coalescence is divided into the process of single fiber, therefore needs certain
Separate fibre bundle.
Reducing roll spacing or improving roller speed ratio helps to increase shearing force, improves dispersion effect, but for fragile fibre, also answer
Take into account the fracture of fiber in mixing process.In addition, the method for increasing inherent viscosity to improve shearing force can also be used.
Granulated filler is added first in rubber to improve system viscosity, then adds staple fiber mixing.
Increased with staple fiber amount when mill mixing with addition, the turning refining of sizing material, cutter are more difficult, should stop when necessary
Lower open mill carries out cutting operation, to guarantee the constant orientation of safe operation and staple fiber.
Mixer has high shear rate, and dispersion effect can be improved and reduce labor intensity, improves work situation.But
It may cause fibre length decline, while fiber can not be also orientated.It is first mended and is refined with open mill again with mixer mixing, take fiber
To preferable effect can be obtained.
It should be noted that in mixing process, since 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, since the property at interface is different, the two is viscous
It closes and needs special processing method and adhesive.
Raw material selection: fluorubber, p-aramid fiber staple fiber pulp, DBPH, anti-aging agent ODA, carbon black, light MgO, dioxy
Change titanium, Ca (OH) 2, polyethylene wax, stearic acid, particular adhesive (amino-containing alkoxy silane 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 requires to be as follows:
The outer silica gel tube material of fluorine and finished product technical requirements in 1 turbocharger of table
Fiber strength step includes that aramid fiber short fibre surface modification is as follows:
Disperse the entangled formation accumulation of bad ppta-pulp fibre and hole, it is broken to not only result in composite material
It is bad, and due to reducing the contact area with base rubber, the interface cohesion that can weaken fiber and base rubber acts on；Simultaneously
Since the superfine fibre of entanglement is unable to get good stretching, extension and orientation, contribution of the Fiber Aspect Ratio to Short Fiber Reinforcement is reduced.
Due to structure feature, easily occur to tangle when not pretreated ppta-pulp fibre is kneaded with base rubber to cause
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 are free of polymers compositions, are isolated agent between ppta-pulp fibre and dispersing agent is effective
Isolation, interleaving agent and dispersing agent can thoroughly soak and be isolated Fanglun slurry cake trunk fiber and superfine fibre, reduce between fiber
Polarity active force and with clinging tendency when compounding rubber, be conducive to dispersion of the fiber in base rubber.
Adhesion step includes that interfacial adhesion improves；
In order to increase the bonding force between inner glue layer and outer glue-line, increase by one layer of transition zone among two layers, so that interlayer is viscous
It has closed and has reached 2N/mm or more.
As described above, embodiments of the present invention are described in detail, as long as but essentially without this hair of disengaging
Bright inventive point and effect can have many deformations, 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 (5)
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 weighs a variety of materials required in silicone rubber formulations according to the ratio of formula, other than vulcanizing agent
Silicon rubber, various ingredients and treated aramid fiber pulp investment mixer are kneaded, and the silicon rubber being kneaded is stopped
Vulcanizing agent is added in open mill after putting for 24 hours to be kneaded again, rolling out film；
Step 2 weighs required a variety of materials in fluorine glue rubber compounding according to the ratio of formula, is kneaded on rubber mixing machine
Uniformly, 24 hours post-calendering slices are parked；
Step 3, the mold for taking Related product, after carrying out cleaning, by the semi-finished product sheet material cut out according to job instruction
It is required that carrying out shaping work；
Step 4 will complete molding product and be put into vulcanizing tank to carry out one step cure, complete to demould after the step to dismantle outer layer
Film carries out post vulcanization, after completing entire molding, carries out cleaning cutting head processing, can be packed and stored after passing the inspection
?.
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 step
Also contain following steps in rapid 1；
Fiber strength step；
Dispersion steps: mechanical shearing dispersion；
Adhesion step: 608 adhesive treatment fiber of ROHM AND HAAS 305 or Kai Muluoke；
Mixing step: when being mixed with open mill, should decide whether to plasticate to raw rubber according to the size of raw rubber plasticity first；
Being kneaded charging sequence is that rubber, dosage be few and auxiliary agent, the staple fiber of difficult dispersion, 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
It includes that the fibre bundle of coalescence is divided into the process of single fiber that stroll, which includes: suddenly dispersion process,；It is mentioned using inherent viscosity is increased
The method of high shear force.
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
It takes a walk to be included in rubber suddenly and granulated filler is added first to improve system viscosity, then add staple fiber mixing；When necessary
The open mill that should stop carries out cutting operation, to guarantee the constant orientation of safe operation and staple fiber；First used again with mixer mixing
Open mill mends refining, makes fiber orientation.
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 that interfacial adhesion improves；In order to increase the bonding force between inner glue layer and outer glue-line, increase by one layer of mistake among two layers
Layer is crossed, so that interface layer adhesive strength reaches 2N/mm or more.
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| CN110615992A (en) * | 2019-10-15 | 2019-12-27 | 中国工程物理研究院化工材料研究所 | Chopped fiber reinforced organic silicon resin composition and preparation method thereof |
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| CN103644398A (en) * | 2013-12-18 | 2014-03-19 | 北京天元奥特橡塑有限公司 | Synthetic rubber tube provided with fluorine inside and silicone outside and used for automobile-used intercooler as well as preparation method of synthetic rubber tube |
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| AU2003231424A1 (en) * | 2003-05-09 | 2004-11-26 | Marugo Rubber Industries, Ltd. | Rubber hose and method for manufacture thereof |
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| CN103644398A (en) * | 2013-12-18 | 2014-03-19 | 北京天元奥特橡塑有限公司 | Synthetic rubber tube provided with fluorine inside and silicone outside and used for automobile-used intercooler as well as preparation method of synthetic rubber tube |
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