CN104842619A - Prepreg manufacturing process of high-tenacity multilayer structure - Google Patents
Prepreg manufacturing process of high-tenacity multilayer structure Download PDFInfo
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- CN104842619A CN104842619A CN201510225863.3A CN201510225863A CN104842619A CN 104842619 A CN104842619 A CN 104842619A CN 201510225863 A CN201510225863 A CN 201510225863A CN 104842619 A CN104842619 A CN 104842619A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/08—Impregnating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/04—4 layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/05—5 or more layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/18—Aircraft
Abstract
The invention provides a prepreg manufacturing process of a high-tenacity multilayer structure. The produced prepreg is of multilayer structure with more than four layers. On the basis of the tri-layer structure with a resin layer, a fiber layer and another resin layer, one or more toughening layers are added, and correspondingly more resin layers are added. In the prepreg manufacturing process, proper flexibilizer is added into the mixed resin or not, and other flexiblizers exist in a manner of the toughening layers, so that resin viscosity is low enough to be suitable for common coating equipment in production during coating, and damage to equipment due to ultrahigh resin viscosity cannot be caused. By the prepreg manufacturing process, impregnation degree of prepreg is high, probability in generating gaps during curing of subsequent products is lowered, post-impact compression strength of products is greatly improved, and correspondingly, service life and shelf life of the prepreg are prolonged.
Description
Technical field
The present invention relates to a kind of high tenacity sandwich construction prepreg manufacturing process, relate to the prepreg manufacture using toughened resin as matrix.
Background technology
Along with the development in epoch and the progress of science, what polymer matrix composites were more and more wider is applied to the fields such as space flight and aviation, track traffic, marine settings and new forms of energy.Particularly field of aerospace, has become polymer matrix composites and has developed direction of greatest concern.
In general, as the polymer matrix composites that main force support structure part and time load-carrying construction part of aircraft body use, one of condition of material indispensability is exactly have high tenacity, and the toughness of polymer matrix composites can be characterized by its post-impact compression (CAI), there is high tenacity namely there is compressive strength after HI high impact.The matrix resin of this conditional decision polymer matrix composites is necessary for high tenacity resin.Therefore how toughened resin makes it have higher toughness is one of main flow direction of current resin research and development.For general resin matrix, toughness reinforcing traditional method adds flexibilizer exactly to improve resin toughness in formula, if it is too large that thing followed problem is exactly toughness reinforcing dosage, toughness reinforcing rear resin will have compares the higher viscosity of ordinary resin or lower viscosity.
Use the method for high tenacity production of resins prepreg to be generally hot melt two-step method now, technique is divided into film and impregnation two procedures.When producing prepreg, the minimum gap that operating personnel are formed by the extruding of high precision roller wheels in film and impregnation operation controls resin content and prepreg impregnation degree respectively.The actual temperature upper limit of usual prepreg production equipment is no more than 120 DEG C, and the viscosity of most of high tenacity resin under this temperature extremes is also higher.Therefore when using high tenacity resin directly to produce prepreg, often because toughened resin viscosity is too high, cause that prepreg production equipment is damaged or resin is difficult to soak into fiber, simultaneously, also exist because high tenacity resin interpolation flexibilizer is too much, cause resin viscosity too low, cause the prepreg produced cannot the problem that uses of paving.Therefore in order to provide the CAI value and the high tenacity prepreg having excellent processing performance concurrently that meet product design performance requirement to field of aerospace, the manufacturing process of a kind of novel high tenacity prepreg of necessary research solves above problem.
Summary of the invention
The object of this invention is to provide a kind of new technology, solve and meet in the process of high tenacity prepreg of aerospace structural designing requirement in production, the series of problems existed in existing high tenacity prepreg production technology, such as high tenacity resin viscosity is large, cause produce prepreg equipment easily damage or prepreg impregnation degree low, and the too low caused prepreg of resin viscosity cannot the normal situation such as paving use.Simultaneously under raw material meet the requirements of prerequisite, ensure that the CAI performance of the prepreg respective plates that the method is produced can be greatly improved, in order to meet the production engineering specifications of space flight and aviation.
In order to reach above object, technical solution of the present invention is:
A kind of high tenacity sandwich construction prepreg manufacturing process, the prepreg produced is the sandwich construction of more than four layers, on the basis of resin bed-fibrage-resin bed three-decker, sets up one or more layers toughening layer, set up multi-layer resinous layer accordingly, concrete production craft step is simultaneously:
A. design the sandwich construction of prepreg, the basic model of sandwich construction is the structure of two-layer or two-layer above resin bed+one or more layers of fibrage+one or more layers of toughening layer, and fibrolaminar upper and lower surface directly contacts with two layers of resin layer; Such as, can be two layers of resin layer+two-layer toughening layer+one deck fibrage or three-layer resin layer+one deck toughening layer+one deck fibrage or two layers of resin layer+one deck toughening layer+one deck fibrage etc.
B. according to the sandwich construction of the prepreg of design, select to add toughening layer in film or impregnation operation, then use the corresponding prepreg of hot melt preimpregnation device fabrication.
Further, fibrage is one or more compositions in carbon fiber, glass fibre, aramid fiber, the contour performance fibers of quartz fibre, fibers form is fibre bundle, one-way fabric, multi-axial fabric or blended fabric, fiber areal densities 30gsm-800 gsm.
Further, resin bed is prepreg toughened resin, and during prepreg toughened resin 90 DEG C, resin viscosity remains 500-200000cPs, and the mass content that All Trees lipid layer comprises toughening layer in prepreg is simultaneously 25%-50%.
Further, resin Composition in prepreg toughened resin is one or more in epoxy resin, phenolic resins, bimaleimide resin and cyanate ester resin compositions of being mixed to get by a certain percentage, and the resin that uses of every layer of resin bed is the identical resin of same or multiple not identical resin.Resin portion is the function such as it is fire-retardant, corrosion resistance, toughness in order to improve, also can add various inorganic particulate as aluminium hydroxide, Halogen or the fire retardant such as phosphorous, polyurethane toughened dose, and improve the reagent such as its technological levelling agent, defoamer.
Curing agent component in the resin system of prepreg can be one or more the mixture in amine, anhydrides, metallic salt, imidazoles, linear resin oligomer class and their derivative, its concrete composition and ratio relevant with resin Composition.
Further, the flexibilizer added in toughening layer and resin bed is thermoplastic toughening agent, and flexibilizer adopts one or more mixtures combined by a certain percentage in polysulfones, polyether sulfone, polyether-ketone, polyether-ether-ketone, PEI, polyphenylene oxide, polymethyl methacrylate, modified polyarylether sulfone and Merlon etc.
Further, the mass percent of the flexibilizer in resin bed accounts for the 5%-20% of whole resin Composition mass percent, preferred 10%-15%;
Further, in prepreg, the quality of toughening layer accounts for the mass percent of the resin system that whole prepreg uses is 1%-40%, preferred 5%-20%, more preferably 10%-15%; Toughening layer exists with felt, film, powder or form of fabric.
Further, add toughening layer and be adopted as spraying, coating or direct coverage mode in the method on resin glued membrane or prepreg surface, adding method is by toughening layer toughening agent composition and Determines.
Further, concrete employing following hot melt preimpregnation equipment is produced: hot melt preimpregnation equipment comprise set gradually press bonding roller group, the first release liners wind-up roll group, can heated type roller set, the second release liners wind-up roll group, press bonding roller group comprises upper and lower symmetrically arranged press bonding roller, can heated type roller set to comprise two to above diameter be that the ganoid of 6cm-20cm can heated type running roller, at least one unreeling shaft and at least one Scroll, the first release liners wind-up roll group, the second release liners wind-up roll group comprise upper and lower symmetrically arranged release liners wind-up roll respectively.
Further, in painting membrane process, adding the concrete mode of toughening layer is:
B1, first by resin coating film, determine do not add the pure resin glued membrane volume quantity of toughening layer and need to add the glued membrane volume quantity of toughening layer according to the design of overall prepreg, and the formal character diverse ways according to toughness reinforcing thing on film applicator adds toughening layer on corresponding glued membrane;
B2, at least two-layer pure resin glued membrane and fiber are obtained preliminary prepreg through hot pressing compound on pre-dipping machine, then at least one deck is added on preliminary prepreg with the glued membrane of toughening layer, rolling after one group of hot-pressing roller group further pressing;
Further, in impregnation operation, adding the concrete mode of toughening layer is:
B1, first by resin coating film, determine according to the design of overall prepreg the quantity that pure resin glued membrane is rolled up, whole glued membrane volume is pure resin glued membrane volume.
B2, at least two-layer pure resin glued membrane and fiber are obtained preliminary prepreg through hot pressing compound on pre-dipping machine, then at least one toughening layer is added according to the formal character diverse ways of toughness reinforcing thing, determine additionally to add the pure resin glued membrane of multilayer again according to design needs, then rolling after one group of hot-pressing roller group further hot pressing.
The invention has the beneficial effects as follows, this kind of high tenacity sandwich construction prepreg manufacturing process, tool has the following advantages:
One, only add appropriate flexibilizer or do not add flexibilizer in the resin mixed, and other flexibilizer exists with the form of toughening layer, ensure that the production that when the film enough low energy of resin viscosity is applicable to common device for coating and can carries out, the situation of the damage equipment generation because resin viscosity is too large can not be caused, the method impregnation degree of prepreg when impregnation is high, reduces the probability producing space in follow-up urethane cure;
Two, the reduction of resin viscosity is corresponding adds resin viscosity, and higher tack ensure that prepreg cannot laying can not use because viscosity is too low;
Three, because introduce toughening layer in production process in prepreg, define with resin and off normal toughness reinforcing, drastically increase the CAI value of goods, thus meet space flight and aviation designing requirement;
Four, this technique reduces the production temperature of prepreg largely, shortens the thermal histories of resin, corresponding service life and the storage life adding prepreg, and decreases production cost.
Accompanying drawing explanation
Fig. 1 is the prepreg structure chart of seven-layer structure.
In Fig. 1,1-1 is resin bed; 1-2 is toughening layer; 1-3 is resin bed; 1-4 is fibrage; 1-5 is resin bed; 1-6 is toughening layer; 1-7 is resin bed.
Fig. 2 is preimpregnation equipment and the process schematic of the production of seven-layer structure prepreg.
In Fig. 2,2-1 is glued membrane one; 2-2 is glued membrane two; 2-3 is twill carbon fibre fabric; 2-4 is press bonding roller group; 2-5 is release liners rolling; 2-6 glued membrane three; 2-7 is glued membrane four; 2-8 is can heated type roller set; 2-9 is PE film.
Fig. 3 is the prepreg structure chart of four-layer structure.
In Fig. 3,3-1 is toughening layer; 3-2 is resin bed; 3-3 is fibrage; 3-4 is resin bed.
Fig. 4 is preimpregnation equipment and the process schematic of the production of four-layer structure prepreg.
In Fig. 4,4-1 is glued membrane one; 4-2 is glued membrane two; 4-3 is 12K carbon fiber; 4-4 is press bonding roller group; 4-5 is release liners rolling; 4-6 is Polyethersulfone membranes; 4-7 is can heated type roller set; 4-8 is PE film.
Detailed description of the invention
The preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing.
The novel process for manufacturing prepregs of embodiment, key point is to have abandoned the two-layer of traditional prepeg or three-decker, novelty be that design object produces prepreg with sandwich construction.With the toughening layer increased in prepreg to the mechanical property of the manufacturability and corresponding goods that ensure prepreg.During production, first select prepreg production process and the method for adding toughening layer according to the prepreg structure of design, then by the common toughened resin of good manufacturability and fibre reinforcement hot pressing compound, then add toughening layer, finally obtain the prepreg needed.Simultaneously in order to ensure the stability of prepreg after having produced between its sandwich construction, the equipment at impregnation operation position devising a set of new hot-pressing roller group, making prepreg fully can be subject to hot pressing further before rolling.
Embodiment technique is applicable to the production of most of high tenacity resin prepreg material, solve the series of problems existed in existing production high tenacity prepreg technology, such as high tenacity resin viscosity is large, cause produce prepreg equipment easily damage or prepreg impregnation degree low, also or too much because adding flexibilizer, the too low caused prepreg of resin viscosity is caused to use.Simultaneously under raw material meet the requirements of prerequisite, ensure that the CAI performance of the prepreg respective plates that the method is produced can be greatly improved, in order to meet the production engineering specifications of space flight and aviation.
embodiment 1
According to prepreg structural representation, as Fig. 1, describe instantiation 1 in detail.
According to design, the resin content that prepreg requires is 40%, and fiber areal densities is 220g/m
2, in order to ensure CAI value, needing the epoxy prepreg of the seven-layer structure produced as shown in Figure 1, being followed successively by resin bed 1-1, toughening layer 1-2, resin bed 1-3, fibrage 1-4, resin bed 1-5, toughening layer 1-6, resin bed 1-7.
Wherein, fibrage 1-4 is the twill carbon fibre fabric of fiber areal densities 220 gsm.
Wherein, four layers of resin bed 1-1,1-3,1-5,1-7 use with a tough epoxy resin.Resin Composition selects bisphenol A type resin system, and polyether-ether-ketone selected by flexibilizer, and amine curing agent selected by curing agent.Wherein in resin system, flexibilizer part accounts for 15%.At 90 DEG C, the viscosity of resin is 10000cPs.
Wherein, two-layer toughening layer 1-2,1-6 are polyether-ether-ketone powder beds.
Specific implementation process is as follows:
First film.Film at 75 DEG C, determines altogether to produce four volume glued membranes according to designing requirement, and wherein two volumes are pure resin glued membrane one 2-1 and pure resin glued membrane two 2-2.Then by film applicator in release liners after film, then the polyether-ether-ketone powder adding 10 gsm equably by the mode of dusting at film surface as toughening layer 1-2,1-6, produce two volume glued membrane three 2-6 and glued membrane four 2-7 in this approach.
According to equipment and procedure chart 2, in order to ensure produce time stripping release liners after prepreg structure there will not be at random, installed at the press bonding roller group 2-4 rear of impregnation equipment four groups of diameters be 150mm can heated type roller set 2-8, can the form of steel rider lower rubber roller in heated type roller set 2-8 employing.
During production, by pure resin glued membrane one 2-1 and pure resin glued membrane two 2-2 and the middle twill carbon fibre fabric 2-3 press bonding roller group 2-4 compound in Fig. 2 unreeled, obtain preliminary prepreg.Control press bonding roller group 2-4 temperature and pressure by resin impregnated fiber, the three-decker of basis of formation.Then after carrying out release liners rolling 2-5 by wind-up roll, successively glued membrane three 2-6 and glued membrane four 2-7 is covered on preliminary prepreg, the temperature provided by hot-pressing roller group 2-8 is if 80 DEG C and pressure are as about 200N, glued membrane three 2-6 and glued membrane four 2-7 and preliminary prepreg are combined closely, ensures that after release liners, prepreg structure there will not be at random in stripping.Finally peel off release liners and be covered with PE film 2-9, obtaining the high tenacity prepreg of the seven-layer structure designed.
After testing, prepreg surface viscosity is better, and processing performance is good.45/0/-45/90 method paving is used to cover the sheet material of 6mm, through inspection imporosity after solidification, CAI value≤250MPa.
embodiment 2
According to prepreg structural representation, as Fig. 3, describe instantiation 2 in detail.
According to design, the resin content that prepreg requires is 35%, and fiber areal densities is 145g/m
2, in order to ensure CAI value, needing the cyanate ester resin prepreg of the four-layer structure of producing as shown in Figure 3, being followed successively by toughening layer 3-1, resin bed 3-2, fibrage 3-3, resin bed 3-4.
Wherein, fibrage 3-3 is fiber areal densities 145g/m
212K carbon fiber.
Wherein, two layers of resin layer 3-2,3-4 use with a toughness cyanate ester resin.Resin Composition selects cyanate ester resin system, and polyether sulfone selected by flexibilizer, and acetyl acetone salt selected by curing agent.Wherein in resin system, flexibilizer part accounts for 12%.At 90 DEG C, the viscosity of resin is 5000cPs.
Wherein, toughening layer 3-1 is surface density is 8g/cm
2polyethersulfone membranes.
Specific implementation process is as follows:
First film, film at 65 DEG C, determines altogether to produce two volumes pure resin glued membrane one 4-1 and pure resin glued membrane two 4-2 according to designing requirement.
According to equipment and procedure chart 4, in order to ensure produce time stripping release liners after prepreg structure there will not be at random, installed at the press bonding roller group 4-4 rear of impregnation equipment three groups of diameters be 150mm can heated type roller set 4-7, adopt the form of upper and lower steel rider.
During production, the carbon fibre fabric unreel glued membrane one 4-1 and glued membrane two 4-2 and centre and 12K carbon fiber 4-3, in Fig. 4, press bonding roller group 4-4 compound, obtains preliminary prepreg.Control press bonding roller group 4-4 temperature and pressure by resin impregnated fiber, the three-decker of basis of formation.Then after carrying out release liners rolling 4-5 by wind-up roll, Polyethersulfone membranes 4-6 is unreeled and covers on preliminary prepreg, then enclose one deck release liners protection Polyethersulfone membranes 4-6.By can the temperature that provides of heated type roller set 4-7 such as 75 DEG C and pressure such as about 200N Polyethersulfone membranes 4-6 and preliminary prepreg be combined closely, ensure that after release liners, prepreg structure there will not be at random on peeling off.Finally peel off release liners and be covered with PE film 4-8, obtaining the four floor height toughness prepregs designed.
After testing, prepreg surface viscosity is better, and processing performance is good.45/0/-45/90 method paving is used to cover the sheet material of 6mm, through inspection imporosity after solidification, CAI value≤260MPa.
Principle explanation
Flexibilizer content in resin system is not be necessarily enough to make the CAI performance of resin to reach designing requirement, but the low corresponding viscosity of resin system flexibilizer content enough low guaranteed resin normally can carry out follow-up prepreg to be produced, for ensureing that the prepreg produced has higher toughness, therefore need in prepreg, to add toughening layer to guarantee the high tenacity of final prepregs.Meanwhile, due to the low viscosity of resin, greatly can reduce the temperature that prepreg is produced, shorten thermal histories, increase its service life and storage life, and decrease production cost.
Hot melt process for manufacturing prepregs mainly comprises and is coated with membrane process and impregnation operation, therefore can be divided into increasing in toughening layer or impregnation operation in film production process according to the prepreg structure of design and add toughening layer two kinds of methods.
These two kinds of methods can be used in a step hot melt prepreg production, also can be used in two step hot melt prepregs productions.
Toughening layer is added on resin glued membrane or prepreg surface method can for spraying, the mode such as coating, directly coverings, by toughening layer toughening agent composition and state and existence form decision.
In general, common pre-dipping machine, after a hot pressing, just directly carries out the operation peeled off upper release liners, cover PE film and rolling.Two kinds of above-mentioned methods are all increase new glued membrane or toughening layer on preliminary prepreg surface after first time hot pressing process, visible common pre-dipping machine cannot be further processed the prepreg that with the addition of toughening layer, and being easy to cause sandwich construction prepreg, because adhesion is between layers low, delamination occurs cannot use.If multilayer laminate is added in design simultaneously, just need add multiple rolling and unreel station.Therefore embodiment devise can heated type roller set with ensure the interlayer performance of sandwich construction in prepreg stability and conveniently add adhesive film.
Above-mentioned can heated type roller set be that the ganoid of 6cm-20cm can form with at least one unreeling shaft and at least one Scroll by heated type running roller by two pairs or more diameter, is positioned at common preimpregnation part hot-pressing roller rear.
Can heated type running roller use material can be stainless steel, polyester, rubber etc.; Can heated type roller set be upper and lower double-roller type; Mode of heating can use electrical heating, heat radiation heating or dielectric heating, comprises the heat-conducting medium such as conduction oil, water; Can air pressure or oil pressure can be relied on to carry out dancer rools wheel pressure by warm-up mill wheels.
At least one unreeling shaft is arranged on the arrival end of hot-pressing roller group, and at least one Scroll hot-pressing roller group is arranged on the exit position of hot-pressing roller group.The centre of warm-up mill wheels can intert multiple unreeling shaft and Scroll are being installed according to design requirement simultaneously.
Claims (10)
1. a high tenacity sandwich construction prepreg manufacturing process, it is characterized in that: the prepreg of production is the sandwich construction of more than four layers, on the basis of resin bed-fibrage-resin bed three-decker, set up one or more layers toughening layer, set up multi-layer resinous layer accordingly, concrete production craft step is simultaneously:
A. design the sandwich construction of prepreg, the basic model of sandwich construction is the structure of two-layer or two-layer above resin bed+one or more layers of fibrage+one or more layers of toughening layer, and fibrolaminar upper and lower surface directly contacts with two layers of resin layer;
B. according to the sandwich construction of the prepreg of design, select to add toughening layer in film or impregnation operation, then use the corresponding prepreg of hot melt preimpregnation device fabrication.
2. high tenacity sandwich construction prepreg manufacturing process as claimed in claim 1, it is characterized in that: fibrage is one or more compositions in carbon fiber, glass fibre, aramid fiber, the contour performance fibers of quartz fibre, fibers form is fibre bundle, one-way fabric, multi-axial fabric or blended fabric, fiber areal densities 30gsm-800 gsm.
3. high tenacity sandwich construction prepreg manufacturing process as claimed in claim 1, it is characterized in that: resin bed is prepreg toughened resin, during prepreg toughened resin 90 DEG C, resin viscosity remains 500-200000cPs, and in prepreg, the mass content of All Trees lipid layer is 25%-50% simultaneously.
4. high tenacity sandwich construction prepreg manufacturing process as claimed in claim 3, it is characterized in that: the resin Composition in prepreg toughened resin is one or more in epoxy resin, phenolic resins, bimaleimide resin and cyanate ester resin compositions of being mixed to get by a certain percentage, the resin that every layer of resin bed uses is the identical resin of same or multiple not identical resin.
5. high tenacity sandwich construction prepreg manufacturing process as claimed in claim 1, it is characterized in that: the flexibilizer added in toughening layer and resin bed is thermoplastic toughening agent, flexibilizer adopts one or more mixtures combined by a certain percentage in polysulfones, polyether sulfone, polyether-ketone, polyether-ether-ketone, PEI, polyphenylene oxide, polymethyl methacrylate, modified polyarylether sulfone and Merlon etc.
6. high tenacity sandwich construction prepreg manufacturing process as claimed in claim 5, it is characterized in that: in prepreg, the quality of toughening layer accounts for the mass percent of the resin system that whole prepreg uses is 1%-40%, and toughening layer exists with felt, film, powder or form of fabric.
7. high tenacity sandwich construction prepreg manufacturing process as claimed in claim 5, it is characterized in that: add toughening layer and be adopted as spraying, coating or direct coverage mode in the method on resin glued membrane or prepreg surface, adding method is by toughening layer toughening agent composition and Determines.
8. the high tenacity sandwich construction prepreg manufacturing process as described in any one of claim 1-7, it is characterized in that, concrete employing following hot melt preimpregnation equipment is produced: hot melt preimpregnation equipment comprises the press bonding roller group set gradually, first release liners wind-up roll group, can heated type roller set, second release liners wind-up roll group, press bonding roller group comprises upper and lower symmetrically arranged press bonding roller, can heated type roller set to comprise two to above diameter be that the ganoid of 6cm-20cm can heated type running roller, at least one unreeling shaft and at least one Scroll, first release liners wind-up roll group, second release liners wind-up roll group comprises upper and lower symmetrically arranged release liners wind-up roll respectively.
9. high tenacity sandwich construction prepreg manufacturing process as claimed in claim 1, is characterized in that, adds toughening layer and be specially in painting membrane process:
B1, first by resin coating film, determine do not add the pure resin glued membrane volume quantity of toughening layer and need to add the glued membrane volume quantity of toughening layer according to the design of overall prepreg, and the formal character diverse ways according to toughness reinforcing thing on film applicator adds toughening layer on corresponding glued membrane;
B2, at least two-layer pure resin glued membrane and fiber are obtained preliminary prepreg through hot pressing compound on pre-dipping machine, then at least one deck is added on preliminary prepreg with the glued membrane of toughening layer, rolling after one group of hot-pressing roller group further pressing.
10. high tenacity sandwich construction prepreg manufacturing process as claimed in claim 1, is characterized in that, add toughening layer and be specially in impregnation operation:
B1, first by resin coating film, determine according to the design of overall prepreg the quantity that pure resin glued membrane is rolled up, whole glued membrane volume is pure resin glued membrane volume;
B2, at least two-layer pure resin glued membrane and fiber are obtained preliminary prepreg through hot pressing compound on pre-dipping machine, then at least one toughening layer is added according to the formal character diverse ways of flexibilizer, determine additionally to add the pure resin glued membrane of multilayer again according to design needs, then rolling after one group of hot-pressing roller group further hot pressing.
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