CN106903909A - A kind of ultra-thin prepreg and preparation method thereof - Google Patents
A kind of ultra-thin prepreg and preparation method thereof Download PDFInfo
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- CN106903909A CN106903909A CN201710130226.7A CN201710130226A CN106903909A CN 106903909 A CN106903909 A CN 106903909A CN 201710130226 A CN201710130226 A CN 201710130226A CN 106903909 A CN106903909 A CN 106903909A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/504—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands
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Abstract
The invention provides a kind of preparation method of ultra-thin prepreg, including steps such as fibrage preparation, resin bed preparation and the preparations of ultra-thin prepreg, the preparation method is studied the technology controlling and process of each step, the ultra-thin prepreg of high-quality large-size can be obtained, and obtained prepreg presentation quality is good, the features such as excellent performance, low production cost.It is good using the composite laminated plate mechanical property obtained in ultra-thin prepreg present invention also offers one kind using ultra-thin prepreg obtained in above-mentioned preparation method.
Description
Technical field
The present invention relates to prepreg field, more particularly to a kind of ultra-thin prepreg and preparation method thereof.
Background technology
Laminated composite is one of composite structure form for being most widely used, the preparation side of laminated composite
Method, typically first prepares unidirectional or fabric fibre prepreg, then according to certain ply sequence and laying angle by prepreg
It is piled into laminated composite.The performance of laminated composite and its structure can be by ply sequence and wing flapping design and
Change, but the fiber prepreg material thickness of routine is usually 0.125~0.25mm, is particularly some composite structures are designed
During thin-walled composite structure, cause to allow the laying quantity for using to be restricted, it is difficult so as to greatly reduce its design space
To meet the bearing requirements of composite structure all directions.
Therefore, thin layer technique greatly expands " space " and " free degree " when composite structure is designed, and is thinned
Unidirectional fiber prepregs thickness, is easy to increase the laying number of plies under the structural thickness of regulation, reaches using different laying angle realities
Existing structure is each to bearing requirements.Also, the increase of interface layer causes that material internal micro-crack extension and delamination damage are had
Effect suppresses, and effectively eliminates the micro- song of fiber in conventional prepreg laying, improves composite properties.
Ultra-thin prepreg generally refers to fiber areal densities no more than 40g/m2, prepreg of the thickness no more than 0.04mm should
Prepreg can strengthen the designability in composite plys direction, significant in high end composites field.But it is ultra-thin
The preparation of prepreg is always the emphasis and difficult point in prepreg field, and its preparation has following technical problems：First, large-size
Ultra-thin prepreg splicing seams it is more, open defect is big, and qualification rate is low；Second, the fibrage of ultra-thin prepreg is frequently with small silk
Bundle fiber is extended, and extension multiplying power is low, and production cost is high, low production efficiency；3rd, the preparation of high-quality ultra-thin prepreg is difficult
Degree is big, and composite materials property is relatively low.
The content of the invention
Present invention seek to address that problem as described above.It is an object of the invention to provide a kind of preparation side of ultra-thin prepreg
Method and its obtained ultra-thin prepreg, the preparation method include preparation, the preparation of resin bed and the ultra-thin prepreg of fibrage
Three steps of preparation, and technology controlling and process to each step studies, and the ultra-thin preimpregnation of high-quality large-size can be obtained
Material, and obtained prepreg presentation quality is good, low production cost, it is good using its obtained composite materials property.
The present invention provides a kind of preparation method of ultra-thin prepreg, and the preparation method comprises the steps：
It is prepared by 1S fibrages：N number of tube is fixed on creel, tow is sequentially passed through puts yarn feeding device, exhibition yarn feeding device, drying
Device and wrap-up, most the filament broadening at last contained by N ingots tow are the fibrage of predetermined breadth, wherein, N is integer,
And 2 ＜ N≤25, it is 5~7m/min that fibrage prepares speed；
It is prepared by 2S resin beds：After resin is heated into melten gel, colloidal resin is uniformly coated in release liners using glue spreader,
Resin bed is obtained, wherein, coating temperature is controlled to 60~90 DEG C, and application rate is controlled to 5~20m/min；
It is prepared by the ultra-thin prepregs of 3S：Resin bed obtained in taking two groups of step 2S sets up separately in fibrage upper and lower, is passed through
The gap of rolling device is heated, makes ultra-thin prepreg is obtained in two layers of resin layer infiltration to fibrage, wherein, control roll temperature
It it is 55~110 DEG C, the gap for controlling to heat rolling device is 5~75 μm, the preparation speed control of prepreg is 4~7m/min.
Wherein, in the step 1S, N ingot tow broadenings mode is merging broadening, wherein, the exhibition yarn feeding device is ultrasonic wave
Exhibition yarn feeding device, wherein, the frequency of supersonic generator is 30~315MHz, and medium includes water in ultrasonic bath.
Wherein, in the step 2S, glue spreader glue application portions include rubber tire, fast pulley and adjustment wheel, coating temperature control
It is 70~80 DEG C, application rate is controlled to 10~15m/min, fast pulley Transmission Ratio Control is 80~100%, adjustment wheel Transmission Ratio Control
It is 60~90%.
Wherein, in the step 3S, the surface density of the resin bed is controlled to 7.5~20g/m2。
Wherein, in the step 3S, the surface density of the resin bed is controlled to 8.2~12.2g/m2。
Wherein, in the step 1S, to merge broadening, obtained fibrage is laid on brown paper to N ingot tow broadenings mode
On wound, also, the tube puts yarn tension for 8~15N, and the unwinding tension of the brown paper is 30~50N, described
Fibrage winding tension is 130~170N.
Wherein, in the step 2S, release liners tension force is 200~300N, and rubber tire Stress control is 0.5~1MPa.
Wherein, in the step 3S, the heating rolling device includes four groups of heating rolling equipments, heating rolling equipment
Clearance control is 10~60 μm, four groups of temperature of heating rolling equipment be controlled to successively 80~100 DEG C, 80~105 DEG C, 80~
105 DEG C and 55~75 DEG C.
Wherein, in the step 3S, the first hot plate is also included between first and second group heating rolling equipment, second and
The second hot plate is also included between 3rd group of heating rolling equipment, the first hot plate temperature is controlled to 80~95 DEG C, the second hot plate temperature
Degree is controlled to 80~95 DEG C.
Also, with fibrage after heating rolling device, also by coldplate, upper leafing is peeled off in cooling to the resin bed
Type paper, is obtained the ultra-thin prepreg, wherein the coldplate temperature control is 10~20 DEG C.
Wherein, in the step 1S, the exhibition yarn feeding device is that ultrasonic wave opens up yarn feeding device, the breadth control of obtained fibrage
It is 500mm, in the step 3S, the fibrage is spliced side by side for fibrage obtained in two groups of step 1S, breadth control
It is 1000mm.
The present invention also provides ultra-thin prepreg prepared by a kind of preparation method using above-mentioned ultra-thin prepreg, wherein,
The fibrage be carbon fiber layer, glass layer, aramid fiber layer, polyethylene fiber layer and polyimide fiber layer in one
Kind；
Wherein, the resin bed is epoxy resin layer, urethane resin layer, cyanate resin lipid layer and polyimide resin layer
In one kind；
Also, the fibrage quality accounts for the 45~70% of the prepreg gross mass.
Wherein, the fibrage is obtained by the carbon fibre tow that the trade mark is T700SC-12K, M30SC-18K.
Wherein, the fibrage is carbon fiber layer, and the resin bed is epoxy resin layer, the width of the ultra-thin prepreg
It is 1000mm, fiber areal densities are 20~40g/m2, resin bed surface density is 8.2~12.2g/m2, thickness be 0.02~
0.04mm。
The preparation method of the ultra-thin prepreg provided according to the present invention, main innovative point is by the work to each step
Skill control is studied, and the ultra-thin prepreg of high-quality large-size can be obtained, and obtained prepreg presentation quality is good,
Low production cost, and it is good using its obtained composite materials property.
Specifically, the preparation method for being provided according to the present invention includes that prepared by fibrage, resin bed is prepared and ultra-thin prepreg
Three steps of preparation：
The preparation process of fibrage is mainly merged into the fibrage of predetermined breadth by the extension of N ingots tow, specifically by N number of yarn
Cylinder is fixed on creel, and the filament contained by each tube is by putting yarn feeding device, opening up yarn feeding device, drying device and wrap-up, most
Whole broadening is the fibrage of predetermined breadth, wherein, N is integer, and 2 ＜ N≤25, and in this step, prepared by control fibrage
Speed is 5~7m/min, while production efficiency is ensured, effectively controls the uniformity and breadth of fibrage.In order to further
Ultra-thin prepreg open defect is reduced, and improves mechanical performance, it is preferable that the broadening mode is merging broadening, i.e., in N ingot tow
During broadening, broadening tow is merged simultaneously, and which can farthest reduce the seam between different ingot broadening silks
Gap, uniform fibrage is merged into by N ingot yarns Shu Zhankuan.
Preferably, exhibition yarn feeding device is that ultrasonic wave opens up yarn feeding device.Further, in order to ensure broadening multiplying power and the merging of fiber
Effect, the liquid medium in control ultrasonic bath is mainly technical grade pure water, and supersonic generator frequency for 30~
315MHz.Under the operating condition, fibre bundle broadening thinning is better.
Further, fibrage is laid on brown paper and is wound, tube put yarn tension, brown paper unwinding tension and
The control of fibrage winding tension, and the cooperation with supersonic generator frequency and sonification medium, are many ingot fibre bundle broadenings
The key of merging.
In the prior art frequently with exhibition yarn method be rolled-on method, lead in air-flow method and supercritical ultrasonics technology, but these three methods
Often silk, i.e. N ingots fibre bundle broadening will be directly received after fibre bundle broadening to receive silk respectively and obtain N ingot broadening tow, answered in post-order process
Fibrage there is a possibility that gap is big during conjunction, cause ultra-thin prepreg product appearance defect more.
Preferably, control tube puts yarn tension for 8~15N to the present invention, and the unwinding tension of brown paper is 30~50N, institute
Fibrage winding tension is stated for 130~170N, the cooperation of each parameter can make to be merged while N ingot fibre bundle broadenings, closed
And carried out simultaneously with broadening, homogeneous fibrage is finally obtained, not only effectively reduce the damage to tow, and obtained fiber
Layer volume is smooth homogeneous.
After resin is mainly heated colloidal sol by the preparation process of resin bed, it is uniformly coated on and resin bed is obtained in release liners, its
Middle release liners are passed through in rubber tire with fast pulley gap, in its motion process fast pulley by resin-coated in release liners.
During being somebody's turn to do, the temperature control of coating is 60~90 DEG C, and coating temperature has considerable influence to the quality of resin bed, and temperature is too high easily
Causing the viscosity of resin sol reduces, and influences the amount of resin of resin bed, and coating temperature is too low, is easily caused viscosity increase, influence tree
The uniformity of lipid layer, it is preferable that coating temperature is controlled to 70~80 DEG C.Application rate is to influence another pass of resin bed quality
Key factor, the speed refers specifically to release liners exploitation speed, and the present invention is controlled to 5~20m/min, preferably 10~15m/min.
In order to better control over resin bed quality, the present invention has done further to the operating parameter of fast pulley and adjustment wheel
Research, the ratio between speed and application rate specifically to each wheel operating are studied.Fast pulley speed and application rate it
Than being defined as fixing wheel speed ratio, the Ratio control is 80~100%, similarly by the control of the ratio between adjustment wheel speed and application rate
It is 60~90%, the control of the parameter can keep the stability of resin content and resin bed surface density.
Preferably, the surface density of resin bed is controlled to 7.5~20g/m2, the resin bed of the surface density can effectively with fibre
Dimension layer is infiltrated, and obtained ultra-thin prepreg is relatively thin, and resin content is relatively low, and mechanical performance is more preferably.It is highly preferred that resin
The surface density of layer is controlled to 8.2~12.2g/m2。
Further, the tension force of release liners is 200~300N, and the Stress control of rubber tire is 0.5~1Mpa.Release liners
Tension force influence release liners even running, and then influence resin bed uniformity；The Stress control of rubber tire is further protected
The surface density of resin bed and the uniformity of entirety are demonstrate,proved, the control of above-mentioned parameter can further improve resin bed quality.
Ultra-thin prepreg preparation process is mainly in two layers of resin layer infiltration to fibrage, forms ultra-thin prepreg, should
Process need to carry out heating roll-in to the material base that resin bed and fibrage are constituted, the prepreg that final prepared fiber is evenly distributed.Tool
Body ground, heating rolling device includes corresponding rolling equipment up and down, and corresponding equipment is in vertical prepreg motion side
Upward gap can be adjusted, and temperature is applied in while material base is by gap with pressure and then prepared prepreg.
Wherein, the temperature control of preparation process is 55~110 DEG C, and the clearance control for heating rolling device is 5~75 μm, in advance
The preparation speed control for soaking material is 4~7m/min, and resin bed preferably can be infiltrated into fibrage under the technological parameter, and
Efficiently control prepreg thickness.
Preferably, heating rolling device is specifically included between four groups of heating rolling equipments, and four groups of heating rolling equipments
Gap is controlled to 10~60 μm.Preferably, four groups of temperature of heating rolling equipment be controlled to successively 80~100 DEG C, 80~105 DEG C,
80~105 DEG C and 55~75 DEG C, the design causes that material base, by multiple intensification nipping process, promotes resin, filament in material base
Be uniformly distributed, and further reduce prepreg thickness, especially, when material base is by the 4th group of heating rolling equipment, temperature
There are certain reduction, the more conducively follow-up cooling strip operation of prepreg.Four groups of cooperations of heating rolling equipment, effectively improve ultra-thin
The mechanical property of the quality of prepreg and obtained laminate.
It is highly preferred that also including the first hot plate between first and second group heating rolling equipment, second and third group adds
The second hot plate is also included between hot rolling equipment, hot plate is heated to material base but do not apply pressure, the first hot plate temperature
80~95 DEG C are controlled to, the second hot plate temperature is controlled to 80~95 DEG C, further promote the mobility of resin, improve prepreg matter
Amount, especially, when prepreg heats rolling equipment by first three groups, roll-in-heat is heated-heats by heating roll-in-hot plate
Plate heats-heats the process of roll-in so that resin, filament are evenly distributed, and ultra-thin prepreg performance is more preferably.
Material base, also by coldplate, reduces temperature and peels off release on the resin bed of upper strata after heating rolling device
Paper, wherein temperature control are 10~20 DEG C, and the control process further increases above-mentioned beneficial effect.
Fibrage broadening is thinning and for homogeneous entirety and resin bed preparation is the difficulty for producing ultra-thin prepreg
Point, therefore, the preparation process of fibrage and resin bed need to be strictly controlled quality.The preparation method provided using the present invention
The ultra-thin prepreg of large-size can be obtained, and without splicing seams.
Specifically, the breadth of obtained fibrage is 500mm after merging broadening in rate-determining steps 1S, carries out ultra-thin prepreg
During preparation, the fibrages of volume two are spliced side by side, and then control prepreg breadth for 1000mm, the procedural theory is only
A splicing seams are produced, but the splicing seams controllable naked eyes in the preparation process of prepreg are invisible.
On the other hand, the preparation process in resin bed need to be strictly controlled quality.Further, it then follows resin bed
After preparation method is obtained resin bed, also sample at 5 need to be taken in the layer, carry out the measure of surface density, evaluate and test the homogeneity of resin bed
It is whether up to standard with surface density.And control resin bed surface density be 8.2~12.2g/m2。
Use quality meets the resin bed of the standard, preferably can be infiltrated with the fibrage that breadth is 1000mm,
Also, the mode of operation in the preparation process of prepreg only need use the fibrages of volume two, breadth up to 1000mm, without frequent
Replacing fiber spindle, the splicing seams for only existing in theory, naked eyes are invisible after carrying out prepreg preparation process, are obtained outer
The ultra-thin prepreg of appearance quality and excellent performance, effectively increases the production efficiency of ultra-thin prepreg, reduces cost.
Used as preferred exemplary of the invention, the preparation method of the ultra-thin prepreg comprises the steps：
It is prepared by 1S fibrages：N number of tube is fixed on creel, tow is sequentially passed through puts yarn feeding device, exhibition yarn feeding device, drying
Device and wrap-up, wherein, the yarn tension of putting of tube is 8~15N, and filament most at last contained by N ingots tow merges broadening
It is the fibrage of 500mm breadth, fibrage is laid on brown paper and is wound, wherein, N is integer, and 2 ＜ N≤25；
Wherein, the exhibition yarn feeding device is that ultrasonic wave opens up yarn feeding device, and the frequency of supersonic generator is 30~315MHz, ultrasound
Medium includes water in wave trough, and the unwinding tension of brown paper is 30~50N, and fibrage winding tension is 130~170N, fibrage system
Standby speed is 5~7m/min；
It is prepared by 2S resin beds：After resin is heated into melten gel, colloidal resin is uniformly coated in release liners using glue spreader,
Resin bed is obtained, wherein, coating temperature is controlled to 70~80 DEG C, and application rate is controlled to 10~15m/min, and fixed wheel speed is than control
80~100% are made as, adjustment wheel speed ratio is controlled to 60~90%, and release liners tension force is 200~300N, and rubber tire Stress control is
0.5~1MPa；
It is prepared by the ultra-thin prepregs of 3S：Resin bed obtained in taking two groups of step 2S sets up separately in fibrage upper and lower, wherein, by it
Through the gap of heating rolling device, make ultra-thin prepreg is obtained in two layers of resin layer infiltration to fibrage, fibrage is two groups
Fibrage obtained in step 1S is spliced side by side, and breadth is controlled to 1000mm, and the surface density of resin bed be controlled to 7.5~
20g/m2；
Wherein, roll temperature is controlled for 55~110 DEG C, and the gap for controlling to heat rolling device is 5~75 μm, prepreg
Preparation speed control is 4~7m/min.
Used as preferred exemplary of the invention, the preparation method of the ultra-thin prepreg comprises the steps：
It is prepared by 1S fibrages：N number of tube is fixed on creel, tow is sequentially passed through puts yarn feeding device, exhibition yarn feeding device, drying
Device and wrap-up, wherein, the yarn tension of putting of tube is 8~15N, and filament most at last contained by N ingots tow merges broadening
It is the fibrage of 500mm breadth, fibrage is laid on brown paper and is wound, wherein, N is integer, and 2 ＜ N≤25；
Wherein, the exhibition yarn feeding device is that ultrasonic wave opens up yarn feeding device, and the frequency of supersonic generator is 30~315MHz, ultrasound
Medium includes water in wave trough, and the unwinding tension of brown paper is 30~50N, and fibrage winding tension is 130~170N, fibrage system
Standby speed is 5~7m/min；
It is prepared by 2S resin beds：After resin is heated into melten gel, colloidal resin is uniformly coated in release liners using glue spreader,
Resin bed is obtained, wherein, coating temperature is controlled to 70~80 DEG C, and application rate is controlled to 10~15m/min, and fixed wheel speed is than control
80~100% are made as, adjustment wheel speed ratio is controlled to 60~90%, and release liners tension force is 200~300N, and rubber tire Stress control is
0.5~1MPa；
It is prepared by the ultra-thin prepregs of 3S：Resin bed obtained in taking two groups of step 2S sets up separately in fibrage upper and lower, wherein, by it
Through the gap of heating rolling device, make ultra-thin prepreg is obtained in two layers of resin layer infiltration to fibrage, fibrage is two groups
Fibrage obtained in step 1S is spliced side by side, and breadth is controlled to 1000mm, and the surface density of resin bed be controlled to 8.2~
12.2g/m2；
Wherein, heating rolling device includes four groups of heating rolling equipments, between first and second group heating rolling equipment also
The first hot plate is included, the second hot plate is also included between second and third group heating rolling equipment, heat rolling equipment and heat
The temperature of plate is controlled to 80~100 DEG C, 80~105 DEG C, 80~105 DEG C and 55~75 DEG C successively, and the first hot plate temperature is controlled to
80~95 DEG C, the second hot plate temperature is controlled to 80~95 DEG C, and the clearance control for heating rolling equipment is 10~60 μm, resin bed with
After heating rolling device, also by coldplate, release liners are peeled off in cooling to fibrage, and the ultra-thin prepreg is obtained, wherein
The coldplate temperature control is 10~20 DEG C, and the preparation speed control of prepreg is 4~7m/min.
According to another aspect of the present invention, there is provided a kind of ultra-thin prepreg prepared using above-mentioned preparation method.Specifically
Ground, the fibrage be carbon fiber layer, glass layer, aramid fiber layer, polyethylene fiber layer and polyimide fiber layer in
One kind；
The resin bed is in epoxy resin layer, urethane resin layer, cyanate resin lipid layer and polyimide resin layer
It is a kind of；Wherein, control fibrage quality accounts for the 45~70% of prepreg gross mass, and fiber content higher can be effectively increased system
The tensile strength of the material after standby composite.
Further, the preparation method that the present invention is provided is especially suitable for the preparation of carbon fiber prepreg, is particularly suitable for the trade mark
It is the carbon fibre tow of the big tow of T700SC-12K and M30SC-18K.Because small tow price is higher, therefore use the big silk
For raw material is prepared, ultra-thin prepreg can reduce cost to beam carbon fiber, and can further improve ultra-thin prepreg and laminated
The mechanical property of plate.It is highly preferred that the resin bed of the prepreg is epoxy resin layer.
Especially, the present invention is claimed using a kind of ultra-thin prepreg of large-size obtained in above-mentioned preparation method, should
The width of prepreg is 1000mm, and fiber areal densities are 20~40g/m2, resin bed surface density is 8.2~12.2g/m2, thickness is
0.02~0.04mm.
The present invention is studied for the technology controlling and process of each step, and compared with prior art, its advantage is embodied in：
First, control parameter of the present invention is more, preparation process fibrage, resin bed and prepreg quality control stabilization, has
Effect solves high-quality ultra-thin prepreg and prepares the big technical problem of difficulty.
Second, the obtained ultra-thin prepreg of the present invention can realize the preparation of the ultra-thin prepreg of large-size, effectively reduce outer
Defect is seen, and quality is good, and qualification rate is high.
3rd, the present invention can be used the preparation of the big ultra-thin prepregs of bunch fiber Shu Jinhang, effectively improve prepreg preparation
Laminate mechanical property while, effectively improve production efficiency, production cost is greatly reduced.
The beneficial effect of ultra-thin preimpregnation preparation method for material of the invention and ultra-thin prepreg will be given specifically by embodiment
Experimental data is illustrated.
Brief description of the drawings
The accompanying drawing for being incorporated into specification and constituting a part for specification shows embodiments of the invention, and with
Description is used to explain principle of the invention that together in the drawings, similar reference to be used to represent similar key element, under
Accompanying drawing in the description of face is some embodiments of the present invention, rather than whole embodiments, is come for those of ordinary skill in the art
Say, on the premise of not paying creative work, other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 shows a kind of preparation flow figure of ultra-thin prepreg of the invention.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.Need
Illustrate, in the case where not conflicting, the feature in embodiment and embodiment in the application can mutually be combined.
Embodiment 1
It is prepared by 1S fibrages：By the 25 ingot trades mark for the carbon fiber yarn cylinder of T700SC-12K is fixed on creel, tow is successively
By putting yarn feeding device, exhibition yarn feeding device, drying device and wrap-up, the most filament broadening at last contained by 25 ingot tow is
The fibrage of 500mm breadth, wherein, it is 5m/min that fibrage prepares speed；
It is prepared by 2S resin beds：After epoxy resin is heated into melten gel, colloidal resin is uniformly coated on using glue spreader release
On paper, resin bed is obtained, wherein, coating temperature is controlled to 70 DEG C, and application rate is controlled to 10m/min；
It is prepared by the ultra-thin prepregs of 3S：Resin bed obtained in taking two groups of step 2S sets up separately in fibrage upper and lower, is passed through
The gap of rolling device is heated, makes ultra-thin prepreg is obtained in two layers of resin layer infiltration to fibrage, wherein, control roll temperature
It it is 80 DEG C, the gap for controlling to heat rolling device is 60 μm or so, the preparation speed control of prepreg is 4m/min.
The width that ultra-thin prepreg is obtained is 1000mm, and fiber areal densities are 40g/m2, thickness is 0.04mm.
Embodiment 2
It is prepared by 1S fibrages：By the 19 ingot trades mark for the carbon fiber yarn cylinder of T700SC-12K is fixed on creel, tow is successively
By putting yarn feeding device, exhibition yarn feeding device, drying device and wrap-up, wherein, tube puts yarn tension for 8N, most 19 ingots silk at last
It is the fibrage of 500mm breadth that the filament of Shu Suohan merges broadening, and fibrage is laid on brown paper and is wound；
Also, in ultrasonic wave exhibition yarn feeding device, the frequency of supersonic generator is 100MHz, and medium is industry in ultrasonic bath
Level pure water, the unwinding tension of brown paper is 30N, and fibrage winding tension is 130N, and it is 6m/min that fibrage prepares speed；
It is prepared by 2S resin beds：After epoxy resin is heated into melten gel, colloidal resin is uniformly coated on using glue spreader release
On paper, resin bed is obtained, wherein, coating temperature is controlled to 70 DEG C, and application rate is controlled to 15m/min, fast pulley Transmission Ratio Control
It is 80%, adjustment wheel speed ratio is controlled to 60%, and release liners tension force is 200N, and rubber tire Stress control is 0.5MPa；
It is prepared by the ultra-thin prepregs of 3S：Resin bed obtained in taking two groups of step 2S sets up separately in fibrage upper and lower, wherein, by it
Through the gap of heating rolling device, make ultra-thin prepreg is obtained in two layers of resin layer infiltration to fibrage, fibrage is two groups
Fibrage obtained in step 1S is spliced side by side, and breadth is controlled to 1000mm, and the surface density of resin bed is controlled to 10g/
m2；
Wherein, roll temperature is controlled for 90 DEG C, and the gap for controlling to heat rolling device is 50 μm or so, the preparation of prepreg
Speed control is 7m/min.
The width that ultra-thin prepreg is obtained is 1000mm, and fiber areal densities are 30g/m2, thickness is 0.03mm.
Embodiment 3
It is prepared by 1S fibrages：By the 14 ingot trades mark for the carbon fiber yarn cylinder of T700SC-12K is fixed on creel, tow is successively
By putting yarn feeding device, exhibition yarn feeding device, drying device and wrap-up, wherein, tube puts yarn tension for 15N, most 14 ingot at last
It is the fibrage of 500mm breadth that filament contained by tow merges broadening, and fibrage is laid on brown paper and is wound；
Also, in ultrasonic wave exhibition yarn feeding device, the frequency of supersonic generator is 100MHz, and medium is industry in ultrasonic bath
Level pure water, the unwinding tension of brown paper is 30N, and fibrage winding tension is 150N, and it is 7m/min that fibrage prepares speed；
It is prepared by 2S resin beds：After epoxy resin is heated into melten gel, colloidal resin is uniformly coated on using glue spreader release
On paper, resin bed is obtained, wherein, coating temperature is controlled to 75 DEG C, and application rate is controlled to 12m/min, fast pulley Transmission Ratio Control
It is 95%, adjustment wheel speed ratio is controlled to 74%, and release liners tension force is 260N, and rubber tire Stress control is 0.75MPa；
It is prepared by the ultra-thin prepregs of 3S：Resin bed obtained in taking two groups of step 2S sets up separately in fibrage upper and lower, wherein, by it
Through the gap of heating rolling device, make ultra-thin prepreg is obtained in two layers of resin layer infiltration to fibrage, fibrage is two groups
Fibrage obtained in step 1S is spliced side by side, and breadth is controlled to 1000mm, and the surface density of resin bed is controlled to
12.2g/m2；
Wherein, heating rolling device includes four groups of heating rolling equipments, between first and second group heating rolling equipment also
The first hot plate is included, the second hot plate is also included between second and third group heating rolling equipment, heat the temperature of rolling equipment
Degree is controlled to 80 DEG C, 100 DEG C, 95 DEG C, 72 DEG C successively, and the temperature of the first hot plate and the second hot plate is 95 DEG C, and heating roll-in sets
Standby clearance control is 45 μm or so, and resin bed with fibrage after heating rolling device, also by coldplate, peel off by cooling
Upper strata release liners, are obtained the ultra-thin prepreg, wherein the cooling roll temperature is controlled to 20 DEG C, the preparation speed control of prepreg
It is made as 5m/min.
The width that ultra-thin prepreg is obtained is 1000mm, and fiber areal densities are 22.4g/m2, thickness is 0.022mm.
Embodiment 4
It is prepared by 1S fibrages：By the 15 ingot trades mark for the carbon fiber yarn cylinder of T700SC-12K is fixed on creel, tow is successively
By putting yarn feeding device, exhibition yarn feeding device, drying device and wrap-up, wherein, tube puts yarn tension for 10N, most 15 ingot at last
It is the fibrage of 500mm breadth that filament contained by tow merges broadening, and fibrage is laid on brown paper and is wound；
Also, in ultrasonic wave exhibition yarn feeding device, the frequency of supersonic generator is 200MHz, and medium is industry in ultrasonic bath
Level pure water, the unwinding tension of brown paper is 50N, and fibrage winding tension is 170N, and it is 5m/min that fibrage prepares speed；
It is prepared by 2S resin beds：After epoxy resin is heated into melten gel, colloidal resin is uniformly coated on using glue spreader release
On paper, resin bed is obtained, wherein, coating temperature is controlled to 72 DEG C, and application rate is controlled to 10m/min, fast pulley Transmission Ratio Control
It is 90%, adjustment wheel speed ratio is controlled to 72%, and release liners tension force is 240N, and rubber tire Stress control is 0.72MPa；
It is prepared by the ultra-thin prepregs of 3S：Resin bed obtained in taking two groups of step 2S sets up separately in fibrage upper and lower, wherein, by it
Through the gap of heating rolling device, make ultra-thin prepreg is obtained in two layers of resin layer infiltration to fibrage, fibrage is two groups
Fibrage obtained in step 1S is spliced side by side, and breadth is controlled to 1000mm, and the surface density of resin bed is controlled to 9.8g/
m2；
Wherein, heating rolling device includes four groups of heating rolling equipments, between first and second group heating rolling equipment also
The first hot plate is included, the second hot plate is also included between second and third group heating rolling equipment, heat the temperature of rolling equipment
Degree is controlled to 90 DEG C, 105 DEG C, 80 DEG C, 60 DEG C successively, and the temperature of the first hot plate and the second hot plate is 90 DEG C, and heating roll-in sets
Standby clearance control is 48 μm or so, and resin bed with fibrage after heating rolling device, also by coldplate, peel off by cooling
Upper strata release liners, are obtained the ultra-thin prepreg, wherein the cooling roll temperature is controlled to 15 DEG C, the preparation speed control of prepreg
It is made as 6m/min.
The width that ultra-thin prepreg is obtained is 1000mm, and fiber areal densities are 24g/m2, thickness is 0.024mm.
Embodiment 5
It is prepared by 1S fibrages：By the 13 ingot trades mark for the carbon fiber yarn cylinder of T700SC-12K is fixed on creel, tow is successively
By putting yarn feeding device, exhibition yarn feeding device, drying device and wrap-up, wherein, tube puts yarn tension for 12N, most 13 ingot at last
It is the fibrage of 500mm breadth that filament contained by tow merges broadening, and fibrage is laid on brown paper and is wound；
Also, in ultrasonic wave exhibition yarn feeding device, the frequency of supersonic generator is 200MHz, and medium is industry in ultrasonic bath
Level pure water, the unwinding tension of brown paper is 45N, and fibrage winding tension is 155N, and it is 5.5m/min that fibrage prepares speed；
It is prepared by 2S resin beds：After epoxy resin is heated into melten gel, colloidal resin is uniformly coated on using glue spreader release
On paper, resin bed is obtained, wherein, coating temperature is controlled to 80 DEG C, and application rate is controlled to 15m/min, fast pulley Transmission Ratio Control
It is 100%, adjustment wheel speed ratio is controlled to 90%, and release liners tension force is 300N, and rubber tire Stress control is 0.7MPa；
It is prepared by the ultra-thin prepregs of 3S：Resin bed obtained in taking two groups of step 2S sets up separately in fibrage upper and lower, wherein, by it
Through the gap of heating rolling device, make ultra-thin prepreg is obtained in two layers of resin layer infiltration to fibrage, fibrage is two groups
Fibrage obtained in step 1S is spliced side by side, and breadth is controlled to 1000mm, and the surface density of resin bed is controlled to 8.2g/
m2；
Wherein, heating rolling device includes four groups of heating rolling equipments, between first and second group heating rolling equipment also
The first hot plate is included, the second hot plate is also included between second and third group heating rolling equipment, heat the temperature of rolling equipment
Degree is controlled to 100 DEG C, 80 DEG C, 105 DEG C, 65 DEG C successively, and the temperature of the first hot plate and the second hot plate is 85 DEG C, and heating roll-in sets
Standby clearance control is 30 μm or so, and resin bed with fibrage after heating rolling device, also by coldplate, peel off by cooling
Upper strata release liners, are obtained the ultra-thin prepreg, wherein the cooling roll temperature is controlled to 10 DEG C, the preparation speed control of prepreg
It is made as 5m/min.
The width that ultra-thin prepreg is obtained is 1000mm, and fiber areal densities are 20g/m2, thickness is 0.02mm.
Comparative example
In order to further illustrate beneficial effects of the present invention, the ultra-thin preimpregnation of the 1000mm breadth of selection prior art production
Expect embodiment as a comparison, its fiber areal densities is 20g/m2, thickness is 0.02mm, and the ultra-thin prepreg is using T300-3k's
Carbon fibre tow and epoxy resin carry out the production of prepreg.
Test case
By the ultra-thin prepreg application of embodiment 1~5 and comparative example and the preparation of laminate, to the composite wood for finally giving
Material products carry out performance test respectively, as a result as follows：
The ultra-thin prepreg composite article the performance test results of the different size of table 1
| Test performance | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example |
| Tensile strength (MPa) | 2037 | 2135 | 2241 | 2210 | 2245 | 1545 |
| Compressive strength (MPa) | 874 | 897 | 1015 | 1007 | 1020 | 807 |
| Bending strength (MPa) | 1231 | 1403 | 1431 | 1421 | 1444 | 1228 |
| Interlaminar shear strength (MPa) | 78 | 79 | 88 | 89 | 88 | 74 |
From above-mentioned test case it will be seen that the mechanical performance of embodiment 1~5 is far above comparative example, specifically, implement
The average tensile strength of example 1~5 is 2173.6MPa, and the 1545MPa relative to comparative example improves 40.7%；Average compression is strong
It is 962.6MPa to spend, and the 807MPa relative to comparative example improves 19.3%；Average bending strength is 1386MPa, relative to right
The 1228MPa of ratio improves 12.9%；Average interlaminar shear strength is 84.4MPa, and the 74MPa relative to comparative example improves
14.1%.Illustrate the ultra-thin prepreg performance of present invention offer preferably, the laminate properties of preparation are excellent.
In sum, the present invention has following beneficial effects：
First, control parameter of the present invention is more, preparation process fibrage, resin bed and prepreg quality control stabilization, has
Effect solves high-quality ultra-thin prepreg and prepares the big technical problem of difficulty.
Second, the obtained ultra-thin prepreg of the present invention can realize the preparation of the ultra-thin prepreg of large-size, effectively reduce outer
Defect is seen, and quality is good, and qualification rate is high.
3rd, the present invention can be used the preparation of the big ultra-thin prepregs of bunch fiber Shu Jinhang, effectively improve prepreg preparation
While laminate mechanical property, production efficiency is effectively improved, production cost is greatly reduced.
Finally it should be noted that：Herein, term " including ", "comprising" or its any other variant be intended to it is non-
It is exclusive to include, so that process, method, article or equipment comprising a series of key elements not only include those key elements,
But also other key elements including being not expressly set out, or also include by this process, method, article or equipment are solid
Some key elements.In the absence of more restrictions, the key element limited by sentence " including ... ", it is not excluded that including institute
Also there is other identical element in process, method, article or the equipment of stating key element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.Although with reference to the foregoing embodiments
The present invention has been described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these modification or
Replace, do not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (10)
1. a kind of preparation method of ultra-thin prepreg, it is characterised in that the preparation method comprises the steps：
It is prepared by 1S fibrages：N number of tube is fixed on creel, tow is sequentially passed through puts yarn feeding device, exhibition yarn feeding device, drying device
And wrap-up, the most filament broadening at last contained by N ingots tow is the fibrage of predetermined breadth, wherein, N is integer, and 2
＜ N≤25, it is 5~7m/min that fibrage prepares speed；
It is prepared by 2S resin beds：After resin is heated into melten gel, colloidal resin is uniformly coated in release liners using glue spreader, be obtained
Resin bed, wherein, coating temperature is controlled to 60~90 DEG C, and application rate is controlled to 5~20m/min；
It is prepared by the ultra-thin prepregs of 3S：Resin bed obtained in taking two groups of step 2S sets up separately in fibrage upper and lower, is passed through heating
The gap of rolling device, makes ultra-thin prepreg is obtained in two layers of resin layer infiltration to fibrage, wherein, it is 55 to control roll temperature
~110 DEG C, the gap for controlling to heat rolling device is 5~75 μm, and the preparation speed control of prepreg is 4~7m/min.
2. the preparation method of ultra-thin prepreg as claimed in claim 1, it is characterised in that in the step 1S, N ingot tow exhibitions
Mode wide is merging broadening, wherein, the exhibition yarn feeding device is that ultrasonic wave opens up yarn feeding device, wherein, the frequency of supersonic generator is
30~315MHz, medium includes water in ultrasonic bath.
3. the preparation method of ultra-thin prepreg as claimed in claim 1 or 2, it is characterised in that in the step 2S, glue spreader
Glue application portions include rubber tire, fast pulley and adjustment wheel, and coating temperature is controlled to 70~80 DEG C, and application rate is controlled to 10~15m/
Min, fast pulley Transmission Ratio Control is 80~100%, and adjustment wheel speed ratio is controlled to 60~90%；
In the step 3S, the surface density of the resin bed is controlled to 7.5~20g/m2。
4. the preparation method of ultra-thin prepreg as claimed in claim 1 or 2, it is characterised in that in the step 1S, N ingots silk
To merge broadening, obtained fibrage is laid on brown paper and is wound Shu Zhankuan modes, also, the yarn of putting of the tube is opened
Power is 8~15N, and the unwinding tension of the brown paper is 30~50N, and the fibrage winding tension is 130~170N.
5. the preparation method of ultra-thin prepreg as claimed in claim 1, it is characterised in that in the step 2S, release paper
Power is 200~300N, and rubber tire Stress control is 0.5~1MPa.
6. the preparation method of ultra-thin prepreg as claimed in claim 1, it is characterised in that in the step 3S, the heating
Rolling device includes four groups of heating rolling equipments, and the clearance control for heating rolling equipment is 10~60 μm, and four groups of heating roll-ins set
Standby temperature is controlled to 80~100 DEG C, 80~105 DEG C, 80~105 DEG C and 55~75 DEG C successively.
7. the preparation method of ultra-thin prepreg as claimed in claim 6, it is characterised in that in the step 3S, first and the
The first hot plate is also included between two groups of heating rolling equipments, second is also included between second and third group heating rolling equipment
Hot plate, the first hot plate temperature is controlled to 80~95 DEG C, and the second hot plate temperature is controlled to 80~95 DEG C；
And with fibrage after heating rolling device, also by coldplate, upper strata release liners are peeled off in cooling to the resin bed,
The ultra-thin prepreg is obtained, wherein the coldplate temperature control is 10~20 DEG C.
8. the ultra-thin preimpregnation that prepared by a kind of preparation method of ultra-thin prepreg using as any one of claim 1~7
Material, it is characterised in that
The fibrage be carbon fiber layer, glass layer, aramid fiber layer, polyethylene fiber layer and polyimide fiber layer in
One kind；
The resin bed is the one kind in epoxy resin layer, urethane resin layer, cyanate resin lipid layer and polyimide resin layer；
Also, the fibrage quality accounts for the 45~70% of the prepreg gross mass.
9. ultra-thin prepreg as claimed in claim 8, it is characterised in that the fibrage by the trade mark be T700SC-12K,
The carbon fibre tow of M30SC-18K is obtained.
10. ultra-thin prepreg as claimed in claim 8, it is characterised in that the fibrage is carbon fiber layer, the resin bed
It is epoxy resin layer, the width of the ultra-thin prepreg is 1000mm, and fiber areal densities are 20~40g/m2, resin bed surface density
It is 8.2~12.2g/m2, thickness is 0.02~0.04mm.
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| CN109536063A (en) * | 2018-11-19 | 2019-03-29 | 中山大学 | A kind of fiber reinforcement function adhesive tape and preparation method thereof, product |
| CN114085404A (en) * | 2021-12-08 | 2022-02-25 | 中国科学院宁波材料技术与工程研究所 | High-modulus hot-melt prepreg and preparation method thereof |
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