CN104647636A - Preparation method of gradient prepreg with air guiding passage in layer - Google Patents
Preparation method of gradient prepreg with air guiding passage in layer Download PDFInfo
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- CN104647636A CN104647636A CN201510024121.4A CN201510024121A CN104647636A CN 104647636 A CN104647636 A CN 104647636A CN 201510024121 A CN201510024121 A CN 201510024121A CN 104647636 A CN104647636 A CN 104647636A
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Abstract
The invention belongs to the technical field of the low-cost preparation of high-performance composite materials and relates to a gradient prepreg having an air guiding function in layer and good process operability and a preparation method of the gradient prepreg. The compound technology parameters in a prepreg preparation process are regulated and controlled, the dipping degree of resin to dry fibers is controlled, the resin is symmetrically distributed in a gradient manner in the middle layer in the thickness direction of the prepreg, the fiber is infiltrated, meanwhile, an air exhaust channel is pre-formed in a prepreg layer, and the gradient prepreg with an air guiding passage in layer can be prepared; the gradient prepreg can be formed and solidified by an out-of-autoclave process, and the forming process cost of the composite material parts can be greatly reduced.
Description
Technical field
The invention belongs to high-performance composite materials low cost preparing technical field, relate to a kind of preparation method with the gradient prepreg of air guide path in layer.
Background technology
Advanced composite material due to its high specific strength, specific stiffness, excellent corrosion resistance, fatigue properties and structure designability and be widely used in aerospace field.At present, in manufacture technology of composite material field, traditional prepreg autoclave forming process is most widely used, by matrix resin and fortifying fibre in advance completely compound obtain the prepreg of high microsteping collimation, the composite of the excellent mechanical performance with higher fiber volume fraction can be prepared through autoclave forming process.
But for autoclave forming process, its high moulding process cost limits the further genralrlization application of composite.In addition, get rid of prepreg paving due to the larger briquetting pressure of general employing in autoclave forming process and cover in process the gas being entrained in composite interlayer, this adds the risk that core subsides and vacuum bag breaks undoubtedly.
Therefore, autoclave solidifies prepreg forming technique outward and arises at the historic moment.Autoclave solidifies prepreg forming technique and prepreg outward under heat and an atmospheric effect, completes the solidification to composite product.Prepreg is solidified outward for autoclave, vacuum bag in solidification process, can only be adopted to apply an atmospheric pressure environment.Therefore, it is exactly how under an atmospheric operation pressure that exploitation autoclave solidifies overriding challenge that prepreg system faces outward, reduces the voids content of composite, to meet main force support structure part performance requirement.
Traditional prepeg requires that resin is to dry state fiber thorough impregnation, in follow-up composite material solidification forming process, the High Pressure of gas autoclave can make the residual air in laying and other volatile ingredients subside or be dissolved in resin, thus reduces the voids content of composite.But for the outer curing process of autoclave, composite only has an atmospheric pressure to act on composite product surface in the curing process.Therefore, the gas how getting rid of composite preform inside under an atmospheric effect becomes a difficult point of the outer curing process of autoclave.The prepreg being applicable to the outer curing process of autoclave need have unique version, this patent proposes the concept of air guide path in a kind of layer, realizing the optimization of prepreg preimpregnation form by controlling resin viscosity and composite pressure, preparing a kind ofly being applicable to the outer curing process of autoclave and having the gradient prepreg of surface viscosity and degassing function concurrently.This prepreg, in composite material solidification process, under the effect of vacuum, utilizes the inner dry state pars fibrosa of prepreg as air guiding layer, can effectively get rid of the gas being entrained in precast body inside, thus greatly reduce the porosity of composite product.
Summary of the invention
The object of the invention is: propose a kind of preparation method with the gradient prepreg of air guide path in layer, obtain a kind ofly being applicable to the outer curing process of autoclave and having the gradient prepreg of surface viscosity and degassing function concurrently, thus realize the low cost manufacture of high-performance composite materials.
Technical scheme of the present invention is: be prepared as follows:
To prepreg resin heating, when regulating resin viscosity to be 130Pas ~ 200Pas, roll coating process is adopted to prepare resin glued membrane, according to the surface density of the clearance control resin glued membrane that density and the film of the mass content of resin in prepreg, resin roll;
1) after completing the preparation of resin glued membrane, carry out the combination process operation of prepreg, by temperature adjustment used resin initial low-viscosity point ± 10 DEG C, control the viscosity of resin glued membrane between 80Pas ~ 110Pas, platen pressure is regulated to regulate between 0.2 ~ 0.6MPa, make resin glue film immersion dry state fiber and form the air guide path of dry state fiber thickness 10 ~ 20% at the mid portion of dry state fiber, and then completing the preparation of the gradient prepreg with air guide path in layer.
The resin matrix that preparation gradient prepreg uses can be epoxy resin or bimaleimide resin or polyimide resin or phenolic resins or benzoxazine colophony or cyanate ester resin or unsaturated polyester resin.
The fibre reinforcement that preparation gradient prepreg uses can be carbon fiber, quartz fibre, aramid fiber, basalt fibre, string.
The viscosity preparing matrix resin during resin glued membrane is preferably 150Pas.
In prepreg combination process, the preimpregnated process viscosity of resin glued membrane is preferably 100Pas.
In gradient prepreg combination process, platen pressure model is preferably 0.4MPa.
In prepreg combination process, the preimpregnated process viscosity of resin glued membrane is preferably 100Pas, and platen pressure is preferably 0.4MPa.
Advantage of the present invention is: a kind of preparation method with the gradient prepreg of air guide path in layer that the present invention proposes, that be combined for the outer curing process of a kind of prepreg and autoclave, novel technology.By adjusting the pressure parameter in the viscosity of resin system and combination process, can prepare and there is high microsteping collimation, good process operating characteristic, there is the gradient prepreg of certain air guide effect.Gradient prepreg is applicable to the outer curing process of autoclave, namely under the effect of an atmospheric pressure, complete the compacting solidification of composite, dry state fiber simultaneously in gradient prepreg is as the passage be vented during curing molding, paving can be made to cover in process the air scavenge be entrained in composite product, and then reduce the porosity of composite product inside.
Its process advantage has four, and first, dry state fiber in gradient prepreg can be used as air guide path, paving can be got rid of cover in process the gas being entrained in precast body inside under the effect of vacuum; The second, improve the surface viscosity of prepreg, and then the paving that improve prepreg covers operability, the paving being conducive to labyrinth composite product covers sizing; Three, combine with solidification of hot-press tank technique, avoid the use of highly energy-consuming autoclave, reduce composite material process planning cost, the size of composite product is not by the restriction of autoclave size simultaneously, is applicable to heavy parts integration shaping; Four, avoid the use of larger briquetting pressure, thus reduce the risk that composite core subsides and vacuum bag breaks.
Accompanying drawing explanation
Fig. 1 has the gradient prepreg schematic cross-section of air guide effect.
Detailed description of the invention
Below the present invention is described in further details.By the research of different resins system rheological behavior, the technological parameters such as the temperature and pressure in regulation and control prepreg manufacturing process, and then control the distribution of resin in prepreg.Adopt the rheological property of rheometer test resin matrix, comprise under glutinous-temperature characteristics and specified temp glutinous-time characteristic.When prepreg resin to be heated to viscosity be 130Pas ~ 200Pas, carry out the preparation of resin glued membrane.After completing the preparation of resin glued membrane, carry out the combination process of prepreg, now control the viscosity of resin glued membrane between 80Pas ~ 110Pas by temperature, platen pressure is regulated to regulate between 0.2 ~ 0.6MPa, resin glue membrane portions is made to flood dry state fiber, form air guide path 2 in gradient prepreg 1 and layer, and then complete the preparation of the gradient prepreg with air guide path in layer.
Preparation method is:
To prepreg resin heating, when regulating resin viscosity to be 130Pas ~ 200Pas, roll coating process is adopted to prepare resin glued membrane, according to the surface density of the clearance control resin glued membrane that density and the film of the mass content of resin in prepreg, resin roll;
After completing the preparation of resin glued membrane, carry out the combination process operation of prepreg, by temperature adjustment used resin initial low-viscosity point ± 10 DEG C, control the viscosity of resin glued membrane between 80Pas ~ 110Pas, platen pressure is regulated to regulate between 0.2 ~ 0.6MPa, make resin glue film immersion dry state fiber and form the air guide path of dry state fiber thickness 10 ~ 20% at the mid portion of dry state fiber, and then completing the preparation of the gradient prepreg with air guide path in layer.
Specific embodiment 1
Select typical High temp. epoxy resins system, study its rheological behavior, choosing viscosity is temperature spot that 150Pas the is corresponding preparation temperature as resin glued membrane, and one side glued membrane surface density is 35.8g/m
2.Select domestic carbon fibre CCF300 as reinforcement, fiber areal densities is 133g/m
2.In prepreg, resin content is about 35%.At 75 DEG C, carry out the composition operation of gradient prepreg, now the viscosity of glued membrane is about 100Pas, and adjustment platen pressure is 0.4MPa, and then completes the preparation of the gradient preimpregnation with air guide effect.
Specific embodiment 2
Select typical high temperature bismaleimide resin system, study its rheological behavior, choosing viscosity is temperature spot that 140Pas the is corresponding preparation temperature as resin glued membrane, and one side glued membrane surface density is 39.0g/m
2.Select domestic carbon fibre CCF800 as reinforcement, fiber areal densities is 145g/m
2.In prepreg, resin content is about 35%.At 110 DEG C, carry out the composition operation of gradient prepreg, now the viscosity of glued membrane is about 90Pas, and adjustment platen pressure is 0.3MPa, and then completes the preparation of the gradient preimpregnation with air guide effect.
Specific embodiment 3
Select typical cyanate ester resin system, study its rheological behavior, choosing viscosity is temperature spot that 150Pas the is corresponding preparation temperature as resin glued membrane, and one side glued membrane surface density is 76.7g/m
2.Select domestic quartz textile QW280 as reinforcement, fiber areal densities is 285g/m
2.In prepreg, resin content is about 35%.At 100 DEG C, carry out the composition operation of gradient prepreg, now the viscosity of glued membrane is about 110Pas, and adjustment platen pressure is 0.5MPa, and then completes the preparation of the fabric gradient preimpregnation with air guide effect.
Specific embodiment 4
Select typical benzoxazine colophony resin system, study its rheological behavior, choosing viscosity is temperature spot that 145Pas the is corresponding preparation temperature as resin glued membrane, and one side glued membrane surface density is 59.2g/m
2.Select domestic quartz textile QW220 as reinforcement, fiber areal densities is 220g/m
2.In prepreg, resin content is about 35%.At 115 DEG C, carry out the composition operation of gradient prepreg, now the viscosity of glued membrane is about 100Pas, and adjustment platen pressure is 0.35MPa, and then completes the preparation of the fabric gradient preimpregnation with air guide effect.
Claims (7)
1. gradient prepreg with air guide path in layer and preparation method thereof, is characterized in that, is prepared as follows:
1), to prepreg resin heating, when regulating resin viscosity to be 130Pas ~ 200Pas, roll coating process is adopted to prepare resin glued membrane, according to the surface density of the clearance control resin glued membrane that density and the film of the mass content of resin in prepreg, resin roll;
2) after completing the preparation of resin glued membrane, carry out the combination process operation of prepreg, by temperature adjustment used resin initial low-viscosity point ± 10 DEG C, control the viscosity of resin glued membrane between 80Pas ~ 110Pas, platen pressure is regulated to regulate between 0.2 ~ 0.6MPa, make resin glue film immersion dry state fiber and form the air guide path of dry state fiber thickness 10 ~ 20% at the mid portion of dry state fiber, and then completing the preparation of the gradient prepreg with air guide path in layer.
2. a kind of gradient prepreg with air guide path in layer according to claim 1 and preparation method thereof, it is characterized in that, the resin matrix that preparation gradient prepreg uses can be epoxy resin or bimaleimide resin or polyimide resin or phenolic resins or benzoxazine colophony or cyanate ester resin or unsaturated polyester resin.
3. a kind of preparation method with the gradient prepreg of air guide path in layer according to claim 1, is characterized in that: the fibre reinforcement that preparation gradient prepreg uses can be carbon fiber, quartz fibre, aramid fiber, basalt fibre, string.
4. a kind of preparation method with the gradient prepreg of air guide path in layer according to claim 1, is characterized in that: the viscosity preparing matrix resin during resin glued membrane is preferably 150Pas.
5. a kind of preparation method with the gradient prepreg of air guide path in layer according to claim 1, it is characterized in that: in prepreg combination process, the preimpregnated process viscosity of resin glued membrane is preferably 100Pas.
6. a kind of preparation method with the gradient prepreg of air guide effect according to claim 1, is characterized in that: in gradient prepreg combination process, platen pressure model is preferably 0.4MPa.
7. a kind of preparation method with the gradient prepreg of air guide effect according to claim 1, it is characterized in that: in prepreg combination process, the preimpregnated process viscosity of resin glued membrane is preferably 100Pas, and platen pressure is preferably 0.4MPa.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105109068A (en) * | 2015-09-02 | 2015-12-02 | 江苏恒神股份有限公司 | Method for preparing presoak materials for forming non-hot-pressing tank |
| CN106519267A (en) * | 2016-10-18 | 2017-03-22 | 厦门市豪尔新材料股份有限公司 | Nano air leading membrane for improving appearance of fibrous composite material and preparation method thereof |
| GB2554147A (en) * | 2016-07-07 | 2018-03-28 | Hexcel Composites Ltd | Improvements in or relating to infusion moulding |
| CN108749038A (en) * | 2018-05-02 | 2018-11-06 | 江苏恒神股份有限公司 | A kind of vacuum bag cure carbon fiber prepreg and its patterning manufacturing technology |
| CN109134900A (en) * | 2017-06-27 | 2019-01-04 | 深圳光启高等理工研究院 | A kind of prepreg and preparation method thereof |
| CN109648890A (en) * | 2018-12-25 | 2019-04-19 | 中国航空工业集团公司基础技术研究院 | A kind of self-supporting half infiltrates the preparation method of the non-buckling pre-setting fabric of self-adhesion |
| CN110561648A (en) * | 2019-07-26 | 2019-12-13 | 中国航空工业集团公司济南特种结构研究所 | Preparation method of non-autoclave molding medium-temperature curing prepreg |
| CN110982225A (en) * | 2019-12-03 | 2020-04-10 | 航天特种材料及工艺技术研究所 | Prepreg and preparation method thereof |
| CN111002506A (en) * | 2019-12-03 | 2020-04-14 | 航天特种材料及工艺技术研究所 | Composite material and OOA preparation method thereof |
| CN111016377A (en) * | 2019-12-03 | 2020-04-17 | 航天特种材料及工艺技术研究所 | Sandwich structure composite material and OOA preparation method thereof |
| CN114103172A (en) * | 2021-11-26 | 2022-03-01 | 中航复合材料有限责任公司 | Preparation method of asymmetric infiltration high-collimation high-surface-viscosity fabric prepreg |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105109068A (en) * | 2015-09-02 | 2015-12-02 | 江苏恒神股份有限公司 | Method for preparing presoak materials for forming non-hot-pressing tank |
| GB2554147A (en) * | 2016-07-07 | 2018-03-28 | Hexcel Composites Ltd | Improvements in or relating to infusion moulding |
| CN106519267A (en) * | 2016-10-18 | 2017-03-22 | 厦门市豪尔新材料股份有限公司 | Nano air leading membrane for improving appearance of fibrous composite material and preparation method thereof |
| CN106519267B (en) * | 2016-10-18 | 2019-03-26 | 厦门市豪尔新材料股份有限公司 | A kind of nanometer air-guiding film and preparation method thereof for improving fibrous composite appearance |
| CN109134900B (en) * | 2017-06-27 | 2022-06-07 | 深圳光启高等理工研究院 | Prepreg and preparation method thereof |
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| CN108749038B (en) * | 2018-05-02 | 2020-03-24 | 江苏恒神股份有限公司 | Patterning manufacturing technology for curing carbon fiber prepreg by vacuum bag |
| CN108749038A (en) * | 2018-05-02 | 2018-11-06 | 江苏恒神股份有限公司 | A kind of vacuum bag cure carbon fiber prepreg and its patterning manufacturing technology |
| CN109648890A (en) * | 2018-12-25 | 2019-04-19 | 中国航空工业集团公司基础技术研究院 | A kind of self-supporting half infiltrates the preparation method of the non-buckling pre-setting fabric of self-adhesion |
| CN109648890B (en) * | 2018-12-25 | 2020-12-29 | 中国航空工业集团公司基础技术研究院 | Preparation method of self-supporting semi-impregnated self-adhesive non-buckling pre-set fabric |
| CN110561648A (en) * | 2019-07-26 | 2019-12-13 | 中国航空工业集团公司济南特种结构研究所 | Preparation method of non-autoclave molding medium-temperature curing prepreg |
| CN110561648B (en) * | 2019-07-26 | 2021-10-15 | 中国航空工业集团公司济南特种结构研究所 | Preparation method of non-autoclave molding medium-temperature curing prepreg |
| CN110982225A (en) * | 2019-12-03 | 2020-04-10 | 航天特种材料及工艺技术研究所 | Prepreg and preparation method thereof |
| CN111002506A (en) * | 2019-12-03 | 2020-04-14 | 航天特种材料及工艺技术研究所 | Composite material and OOA preparation method thereof |
| CN111016377A (en) * | 2019-12-03 | 2020-04-17 | 航天特种材料及工艺技术研究所 | Sandwich structure composite material and OOA preparation method thereof |
| CN111016377B (en) * | 2019-12-03 | 2022-03-04 | 航天特种材料及工艺技术研究所 | Sandwich structure composite material and OOA preparation method thereof |
| CN114103172A (en) * | 2021-11-26 | 2022-03-01 | 中航复合材料有限责任公司 | Preparation method of asymmetric infiltration high-collimation high-surface-viscosity fabric prepreg |
| CN114103172B (en) * | 2021-11-26 | 2023-11-03 | 中航复合材料有限责任公司 | Preparation method of asymmetric infiltration high-collimation high-surface-viscosity fabric prepreg |
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Application publication date: 20150527 |