CN109161161A - A kind of high tenacity non-autoclave solidifies the production technology of prepreg - Google Patents
A kind of high tenacity non-autoclave solidifies the production technology of prepreg Download PDFInfo
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- CN109161161A CN109161161A CN201810908136.0A CN201810908136A CN109161161A CN 109161161 A CN109161161 A CN 109161161A CN 201810908136 A CN201810908136 A CN 201810908136A CN 109161161 A CN109161161 A CN 109161161A
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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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- 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
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2361/04—Condensation polymers of aldehydes or ketones with phenols only
- C08J2361/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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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
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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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
- C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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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
- C08J2421/00—Characterised by the use of unspecified rubbers
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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
- C08J2461/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2461/04—Condensation polymers of aldehydes or ketones with phenols only
- C08J2461/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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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
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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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
- C08J2479/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2461/00 - C08J2477/00
- C08J2479/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2479/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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Abstract
The present invention provides the production technologies that a kind of high tenacity non-autoclave solidifies prepreg, based on traditional OOA prepreg and toughened resin manufacturing process, in resin or surface resin film adds functional particulate, then during impregnation, by the filtration of fiber, functional particulate is retained in prepreg surface to form surface bulge.Filtration of the method by means of fiber to large-size particle helps prepreg that the air of paving introducing is discharged in the curing process in prepreg surface structure air flue, reduces prepreg porosity.The functional particulate with toughening effect is separated from resin simultaneously, the viscosity and corresponding technology difficulty of high tenacity resin is reduced, ensure that prepreg manufacturing process, facilitate mass production.
Description
Technical field
The present invention relates to technical field of polymer materials, and in particular to a kind of manufacturing process of non-autoclave prepreg.
Background technique
With the development of the times, the demand of composite material is growing day by day, and more and more composite materials are used to include boat
Some fields including its aviation, rail traffic.It is followed by that the cost of composite material is more and more noticeable, how
The cost for reducing composite material is very big actual use problem, either material or moulding process.
Non-autoclave solidification (OOA) prepreg, which is a kind of, to use curing oven that can reach using solidification of hot-press tank phase
When the novel prepreg of performance, the cost of solidification of hot-press tank is greatly reduced in this way.Existing market has had the pre- of many maturations
Leaching material, such as the MTM44-1 and MTM45-1 of Cytec.But for this material, main problem is that how to reduce in solidification
Porosity.In general, the generation of porosity is broadly divided into the gas of resin reaction volatilization in solidification and paving is drawn in the process
Enter the air in interlayer.Currently, the research direction of mainstream is to introduce dry yarn air flue in prepreg to facilitate discharge resin reaction
The gas of volatilization.And it is seldom for the gas studies for introducing again interlayer during paving.
Meanwhile high tenacity resin, especially hot setting resin, there is high resin viscous due to being added to a large amount of toughener
The characteristics of spending, Resin Flow, film and prepeg process difficulty are larger, and possibility more very needs to carry out conventional equipment great
New equipment is purchased in transformation again, and cost is big.Therefore, the manufacturing cost of high tenacity prepreg can compared to conventional prepreg manufacture at
This is much larger, needless to say the manufacturing cost of high tenacity OOA prepreg.
Therefore it is necessary to study a kind of manufacturing process of the suitable high tenacity OOA prepreg of low cost.
Summary of the invention
The object of the present invention is to provide the production technologies that a kind of high tenacity non-autoclave solidifies prepreg, reduce high tenacity
Difficulty in OOA prepreg batch micro operations and use process, be suitable in mild hot setting resin.
In order to reach the goals above, technical solution of the invention is as follows:
A kind of high tenacity non-autoclave solidifies the production technology of prepreg, manufactures resin using the resin for being added to functional particulate
Functional particulate is directly added to surface resin film by film, then manufactures prepreg on conventional impregnation equipment again, specific raw
Production. art step is divided into two methods according to resin formula:
A. include the resin B of addition functional particulate:
Resin film is made using the direct film of the resin B, is then impregnated in equipment with fiber and prepreg is made；
B. include the resin C for being not added with functional particulate:
Using the side resin C painting membrane edge addition functional particulate in surface resin film, the resin film E and fiber that then will produce
Prepreg is made in impregnation in equipment.
A further improvement of the present invention is that: the functional particulate A is polysulfones, polyether sulfone, polyether-ketone, polyether-ether-ketone, gathers
One of etherimide, polyphenylene oxide, modified polyarylether sulfone, Core-shell rubber particles or a variety of particles combined by a certain percentage are mixed
Close object.
A further improvement of the present invention is that: the functional particulate can be in the resin B and in the resin C
Toughening is carried out to primary resin, wherein the average grain diameter of the functional particulate is 20 ~ 100 μm, preferably 30 ~ 50 μm.
Under conditions of environment temperature is lower than solidification temperature, the functional particulate will not react or mutual with resin B or resin C
It is molten.And at curing temperatures the functional particulate can direct in-situ toughening, or dissolve into resin B or resin C and then be precipitated again,
Toughening is carried out to primary resin.Wherein resin B and resin C can solidify under medium temperature (120 DEG C or so) or high temperature (180 DEG C or so).
A further improvement of the present invention is that: the resin B or the resin C are epoxy resin, bismaleimide tree
One of rouge, cyanate ester resin.
A further improvement of the present invention is that: containing at least one functional particulate in the resin B, all functional particulates are accounted for
Entire resin quality ratio is 3% ~ 15%, preferably 5 ~ 10%.
A further improvement of the present invention is that: in the resin B and the resin C, toughener accounts for entire resin quality
Than being 0% ~ 30%.
A further improvement of the present invention is that: in the b method, the functional particulate is using injection, vibration dusting or powder
The mode of end coating is added to the surface resin film of resin C, and additive amount accounts for the 3% ~ 15% of the total grammes per square metre of resin film, and preferably 5 ~ 10%, it should
Resin film is single side film or two-sided form membrane.
A further improvement of the present invention is that: the degree of the resin film wetting fibre is surveyed by liquid infusion method
Examination, the resin infiltration degree of unidirectional pre-immersion material is 95% or more, to guarantee air as few as possible in prepreg；Fabric prereg
Resin infiltration degree be 10 ~ 40%, the air flue that is vented in increase solidification process as far as possible.
A further improvement of the present invention is that: the carbon fiber forms be carbon fiber bundle, one-way fabric, plain cloth, tiltedly
One of pattern fabric, satin fabric, knitted fabric or carbon fiber and other fiber blended fabrics, fiber areal densities be 75 ~
900gsm。
A further improvement of the present invention is that: the resin film is after wetting fibre, because the partial size of functional particulate is enough
Greatly, the functional particulate can be stayed in prepreg surface by fibre bundle filtration, surface bulge be formed, when two layers of prepreg is mutually spread
When patch, the surface bulge that functional particulate is formed can hinder two layers of prepreg to combine closely, and form certain air duct, subtract significantly
Lack the air introduced during paving and avoids product high porosity.
The beneficial effects of the present invention are: a kind of high tenacity non-autoclave provided by the invention solidifies the production work of prepreg
Skill has the advantages that
1. the prepreg manufactured through this technique is not only able to satisfy the demand of resin formulations high tenacity early period, and can expire
The sufficient later period is reached and the comparable requirement of solidification of hot-press tank performance using non-autoclave curing process.
2. functional particulate can carry out toughening to resin in the present invention.Therefore functional particulate is either individually added in resin
Film surface, or directly addition functional particulate, in resin, functional particulate can be resin toughening during cured later.
And for some highly viscous high tenacity resins, functional particulate is individually added to surface resin film, can greatly reduce film
Technology difficulty and the following increased costs.
3. functional particulate addition forms surface bulge on prepreg surface, can help to introduce paving during pre-compacted
Air discharge, reduce product porosity and solidification difficulty, to help to improve the process lifetime of prepreg to a certain extent.
4. the prepreg surface of technique manufacture is dispersed with functional particulate, prepreg surface can be reduced to a certain extent
Viscosity reduces gas and introduces probability.Prepreg viscosity can be adjusted by changing the infiltration degree of prepreg simultaneously, especially
Fabric prereg can be adapted for the demand of different structure part.
Detailed description of the invention
Fig. 1 is the cured high tenacity OOA span prepreg of new type high temperature.
In Fig. 1,1-1 is polyether-ether-ketone particle, and 1-2 is bismaleimide resin, and 1-3 is carbon fiber twills.
Fig. 2 is the painting membrane process of novel high tenacity OOA prepreg.
In Fig. 2,2-1 is to apply deflector roll, and 2-2 is bismaleimide resin, and 2-3 is preliminary resin film, and 2-4 is coldplate, and 2-5 is thickness measuring
Instrument, 2-6 are polyether-ether-ketone particle, and 2-7 is powder coated roller, and 2-8 is heating plate, and 2-9 is rubber roller, and 2-10 is with functional
The resin film of particle.
Fig. 3 is OOA prepreg paving procedure chart.
In Fig. 3,3-1 is polyether-ether-ketone particle, and 3-2 is air flue, and 3-3 is carbon fiber twills.3-4 is bismaleimide resin.
Fig. 4 is the cured high tenacity OOA epoxy prepreg of Novel middle-temperature.
In Fig. 4,4-1 is Core-shell rubber particles, and 4-2 is epoxy resin, and 4-3 is carbon fiber bundle.
Fig. 5 is OOA prepreg paving procedure chart.
In Fig. 5,5-1 is Core-shell rubber particles, and 5-2 is air flue, and 5-3 is carbon fiber bundle, and 5-4 is epoxy resin.
Specific embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be described in further detail, the reality
It applies example for explaining only the invention, protection scope of the present invention is not constituted and limited.
The present embodiment provides the production technology that a kind of high tenacity non-autoclave solidifies prepreg, key point is to have used for reference biography
The OOA prepreg and toughened resin manufacturing process of system, it is innovative to detach toughener from resin in the form of functional particulate,
The manufacture difficulty of resin and subsequent product is reduced, while by the filtration of fiber, functional particulate is retained in prepreg
The air that paving is fallen into is discharged with structured surface protrusion, help in surface.When production, matching for resin is first designed according to performance requirement
Side, chooses whether directly to add functional particulate in resin.It, can be during film for not containing the resin of functional particulate
Functional particulate is added to surface resin film.
Embodiment technique be suitable for high tenacity OOA prepreg manufacture, solve high tenacity resin making process difficulty at
This high problem, while also reducing the molding technology difficulty of prepreg OOA.
Embodiment 1
Solidify prepreg schematic diagram according to high tenacity non-autoclave, specific example 1 is described in detail in such as Fig. 1.
It need to be according to such as Fig. 1 in order to guarantee the toughness and non-autoclave cure process performance of prepreg according to design
Shown in structure produced, 1-1 is polyether-ether-ketone particle, and 1-2 is bismaleimide resin, and 1-3 is carbon fiber twills.
Wherein, the average grain diameter of polyether-ether-ketone particle 1-1 is 40 μm.
Wherein, viscosity of the bismaleimide resin 1-2 at 70 DEG C is 100000 cps, the toughening containing 15% mass ratio in resin
Agent.
Wherein, the fiber areal densities of carbon fiber twills 1-3 are 220gsm, are compiled using the 3K fiber of T300 rank
It knits.
The specific implementation process is as follows:
The bismaleimide resin 1-2 produced is subjected to film on film applicator as shown in Figure 2.By a pair of 75 DEG C of painting deflector roll 2-
Resin 2-2 is coated in release paper and forms preliminary resin film 2-3 by 1 interaction, and surface density is 72 gsm.Use 20 DEG C
Coldplate 2-4 cool down to resin film, pasted on roll surface when preventing resin by powder coated roller.Then by a pair
Polyether-ether-ketone particle is added to preliminary surface resin film, powder coat using baffle and roller surface groove by powder coated roller 2-7
Amount is 8 gsm.Temperature is that 35 DEG C of heating plate 2-8 softens resin film, is acted on by the pressing of rubber roller by functional particulate
It is fixed on surface resin film.PE film is finally covered with to wind to obtain the resin film 2-10 with functional particulate.
Resin film 2-10 and carbon fiber twills 1-3 is impregnated on common impregnation equipment, impregnation temperature is up to 70
DEG C, finally obtain the solidification prepreg of high tenacity non-autoclave described in this patent.
Through examining, prepreg surfacing surface density is uniform, without starved and rich glue region.Contained with liquid infusion method
Soak Tachistoscope, water absorption rate 70%.
By prepreg with [0/45/90/-45]3s24 layers of direction paving, as shown in Figure 3.During laying, two preimpregnation
The surface bulge of material can form gap after contacting another prepreg respectively, as air flue 3-2.Then bag making places into baking
Case solidification.After solidification, C sweeps inspection qualification, laser echo rate 80%.CAI under 6.67kJ impact energy test result is as follows table institute
Show, non-autoclave curing process performance is suitable with solidification of hot-press tank performance:
| Curing process | Non-autoclave solidifies (OOA) | Solidification of hot-press tank |
| CAI value | 310 Mpa | 313 Mpa |
| C is swept | It is qualified | It is qualified |
| Plate porosity | 0.7% | 0.6% |
For this example, if producing the bismaleimide resin prepreg using common prepeg process, it is desirable to which the later period, plate CAI reached
310 Mpa, then resin can be because addition toughener be at least 350000cps in 70 DEG C of viscosity.Due to the spy of the bismaleimide resin
Property, film temperature must be not more than 80 DEG C, therefore at 70 DEG C the resin of 350000cps viscosity be likely to cause film uneven or
Device for coating damage.And using new process described in this patent is then not in the above problem.
Embodiment 2
Solidify prepreg schematic diagram according to high tenacity non-autoclave, specific example 2 is described in detail in such as Fig. 4.
It need to be according to such as Fig. 1 in order to guarantee the toughness and non-autoclave cure process performance of prepreg according to design
Shown in structure produced, 4-1 is Core-shell rubber particles, and 4-2 is epoxy resin, and 4-3 is carbon fiber bundle.
Wherein, the average grain diameter of Core-shell rubber particles grain 4-1 is 30 μm.
Wherein, viscosity of the bismaleimide resin 4-2 at 70 DEG C is 60000 cps, the nucleocapsid rubber containing 10% mass ratio in resin
Micelle.
Wherein, 3K fiber of the carbon fiber bundle 4-3 for T300 rank, fiber areal densities 133gsm,.
The specific implementation process is as follows:
The epoxy resin 4-2 produced is subjected to film on film applicator, film temperature is 75 DEG C.Using single side form membrane, glue
Film surface density is 66gsm.Then resin film is impregnated on common impregnation equipment with carbon fiber bundle 4-3, impregnation temperature is up to
95 DEG C, finally obtain the solidification prepreg of high tenacity non-autoclave described in this patent.
Through examining, prepreg surfacing surface density is uniform, without starved and rich glue region.Contained with liquid infusion method
Soak Tachistoscope, water absorption rate 99%.
By prepreg with [0/45/90/-45]3s32 layers of direction paving, as Fig. 5 shows.During laying, two prepregs
Surface bulge can form gap after contacting another prepreg respectively, as air flue 5-2.Then bag making places into baking oven
Solidification.After solidification, C sweeps inspection qualification, laser echo rate 88%.CAI under 6.67kJ impact energy test result is as follows table institute
Show, non-autoclave curing process performance is suitable with solidification of hot-press tank performance:
| Curing process | Non-autoclave solidifies (OOA) | Solidification of hot-press tank |
| CAI value | 278 Mpa | 281 Mpa |
| C is swept | It is qualified | It is qualified |
| Plate porosity | 0.5% | 0.5% |
The technical staff of industry is retouched in above embodiments and description it should be appreciated that the present invention is not limited to the above embodiments
That states merely illustrates the principles of the invention, and without departing from the spirit and scope of the present invention, the present invention also has various changes
Change and improve, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended
Claims and its equivalent thereof.
Claims (10)
1. the production technology that a kind of high tenacity non-autoclave solidifies prepreg, it is characterised in that: using being added to functional particulate
Resin manufactures resin film or functional particulate is directly added to surface resin film, then manufactures on conventional impregnation equipment again
Prepreg, specific production craft step are divided into two methods according to resin formula:
A. include the resin B of addition functional particulate:
Resin film is made using the direct film of the resin B, is then impregnated in equipment with fiber and prepreg is made；
B. include the resin C for being not added with functional particulate:
Using the side resin C painting membrane edge addition functional particulate in surface resin film, the resin film E and fiber that then will produce
Prepreg is made in impregnation in equipment.
2. the production technology that a kind of high tenacity non-autoclave as described in claim 1 solidifies prepreg, it is characterised in that: described
Functional particulate A is polysulfones, polyether sulfone, polyether-ketone, polyether-ether-ketone, polyetherimide, polyphenylene oxide, modified polyarylether sulfone, nucleocapsid rubber
One of micelle or a variety of granulate mixtures combined by a certain percentage.
3. the production technology that a kind of high tenacity non-autoclave as claimed in claim 2 solidifies prepreg, it is characterised in that: described
Functional particulate can carry out toughening to primary resin in the resin B and in the resin C, wherein the functional particulate
Average grain diameter is 20 ~ 100 μm, preferably 30 ~ 50 μm.
4. the production technology that a kind of high tenacity non-autoclave as described in claim 1 solidifies prepreg, it is characterised in that: described
Resin B or the resin C are one of epoxy resin, bimaleimide resin, cyanate ester resin.
5. the production technology that a kind of high tenacity non-autoclave as described in claim 1 solidifies prepreg, it is characterised in that: described
Containing at least one functional particulate in resin B, it is 3% ~ 15% that all functional particulates, which account for entire resin quality ratio,.
6. the production technology that a kind of high tenacity non-autoclave as described in claim 1 solidifies prepreg, it is characterised in that: described
In resin B and the resin C, it is 0% ~ 30% that toughener, which accounts for entire resin quality ratio,.
7. the production technology that a kind of high tenacity non-autoclave as described in claim 1 solidifies prepreg, it is characterised in that: described
In b method, the functional particulate is added to the surface resin film of resin C by the way of injection, vibration dusting or powder coating,
Additive amount accounts for the 3% ~ 15% of the total grammes per square metre of resin film, which is single side film or two-sided form membrane.
8. the production technology that a kind of high tenacity non-autoclave as described in claim 1 solidifies prepreg, it is characterised in that: described
The degree of resin film wetting fibre is tested by liquid infusion method, has different selections according to carbon fiber forms difference,
Wherein the resin infiltration degree of unidirectional pre-immersion material is 95% or more, and the resin infiltration degree of Fabric prereg is 10 ~ 40%.
9. the production technology that a kind of high tenacity non-autoclave as claimed in claim 8 solidifies prepreg, it is characterised in that: described
Carbon fiber forms are carbon fiber bundle, one-way fabric, plain cloth, twills, satin fabric, knitted fabric or carbon fiber and its
One of its fiber blended fabric, fiber areal densities are 75 ~ 900gsm.
10. the production technology that a kind of high tenacity non-autoclave as claimed in claim 8 solidifies prepreg, it is characterised in that: institute
Resin film is stated after wetting fibre, the functional particulate is stayed in prepreg surface by fibre bundle filtration, surface bulge is formed, when
When the mutual paving of two layers of prepreg, the surface bulge that the functional particulate is formed hinders two layers of prepreg to combine closely, and is formed empty
Gas channel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187438A (en) * | 2020-02-10 | 2020-05-22 | 北京航空航天大学 | Preparation method of carbon fiber/toughened epoxy resin prepreg for vacuum bag forming process |
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| CN103237649A (en) * | 2010-11-09 | 2013-08-07 | 氰特科技股份有限公司 | Compatible carrier for secondary toughening |
| CN104169339A (en) * | 2012-01-17 | 2014-11-26 | 古瑞特（英国）有限公司 | Prepreg for manufacturing composite materials |
| CN102922855A (en) * | 2012-10-24 | 2013-02-13 | 中国航空工业集团公司北京航空材料研究院 | Method for preparing high-tenacity hot-melt prepreg by hot-melt resin matrix |
| CN105531307A (en) * | 2013-07-17 | 2016-04-27 | 古瑞特（英国）有限公司 | Prepreg for manufacturing composite materials |
| CN108137839A (en) * | 2015-12-16 | 2018-06-08 | 东丽株式会社 | Prepreg, layered product, fibre reinforced composites and fibre reinforced composites manufacturing method |
| CN105733193A (en) * | 2016-03-23 | 2016-07-06 | 航天材料及工艺研究所 | Preparation method of epoxy resin based composite material with controllable toughness |
| CN107686658A (en) * | 2016-08-04 | 2018-02-13 | 洛阳尖端技术研究院 | New Tough Bismaleimide Resins cyanate ester resin prepreg and preparation method thereof |
| CN106893126A (en) * | 2017-03-22 | 2017-06-27 | 江苏恒神股份有限公司 | A kind of preimpregnation preparation method for material of resin difference distribution |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187438A (en) * | 2020-02-10 | 2020-05-22 | 北京航空航天大学 | Preparation method of carbon fiber/toughened epoxy resin prepreg for vacuum bag forming process |
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