CN108297454A - A kind of polymer matrix composites, preparation method and vacuum bag used - Google Patents
A kind of polymer matrix composites, preparation method and vacuum bag used Download PDFInfo
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- CN108297454A CN108297454A CN201710277246.7A CN201710277246A CN108297454A CN 108297454 A CN108297454 A CN 108297454A CN 201710277246 A CN201710277246 A CN 201710277246A CN 108297454 A CN108297454 A CN 108297454A
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- 229920013657 polymer matrix composite Polymers 0.000 title claims abstract description 23
- 239000011160 polymer matrix composite Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 49
- 239000011347 resin Substances 0.000 claims abstract description 49
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 37
- 238000002844 melting Methods 0.000 claims abstract description 27
- 230000008018 melting Effects 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims description 19
- 239000003292 glue Substances 0.000 claims description 16
- 229920005992 thermoplastic resin Polymers 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 239000012779 reinforcing material Substances 0.000 claims description 9
- 230000008595 infiltration Effects 0.000 claims description 7
- 238000001764 infiltration Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 239000000088 plastic resin Substances 0.000 claims description 3
- 238000010348 incorporation Methods 0.000 claims description 2
- 230000008034 disappearance Effects 0.000 claims 1
- 230000002708 enhancing effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 20
- 239000004033 plastic Substances 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract description 3
- 238000013459 approach Methods 0.000 abstract 1
- 238000007654 immersion Methods 0.000 abstract 1
- 239000002985 plastic film Substances 0.000 abstract 1
- 229920006255 plastic film Polymers 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 41
- 239000000047 product Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012943 hotmelt Substances 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 239000009719 polyimide resin Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
- B29C70/06—Fibrous reinforcements only
-
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
A kind of polymer matrix composites of present invention offer, preparation method and vacuum bag used, propose the concept of " stratiform manufacture ", by big thickness product using low melting point plastic film in the multiple minute cells layers of thickness higher slice, using heating, pressurizeing after vacuum immersion, the internal flaw of product is reduced, shaping speed is improved, after low melting point plastic melting, it is mixed with thermosetting resin, forms the stratiform toughening layer on microcosmic, improve the interlaminal toughness of product.The concept of this " stratiform manufacture " will propose a new approaches for the manufacture of polymer matrix composites.
Description
Technical field
The present invention relates to a kind of preparation methods of polymer matrix composites, belong to composite material manufacturing field.
Background technology
The advantages that polymer matrix composites can be designed with mechanics, is corrosion-resistant, specific strength is high, specific modulus is high, be always space flight,
One of the material that the military fields such as aviation, weapons are keen to, and it is active in high-end weapon and the core material in high-end product field.
China also advocates in fields such as space flight and aviation and uses polymer matrix composites energetically, with targets such as realizations " loss of weight increases journey ", thus
Improve the task performance and fight capability of aircraft.The big major airplane component in such as China such as vertical fin, rudder use big ruler
Very little composite material, using the dosage of composite material as the important indicator of evaluation performance quality.
With the development of space flight and aviation, demand is proposed to large scale, big thickness composite product, while also in this side
More stringent requirements are proposed in face, i.e. low cost, quickly manufacture, parts quality height.But existing resin base prepares the work of composite material
Skill there is also some problems, such as liquid condition shaping technique etc., when preparing big thickness product, molding time and internal soundness exist
Contradiction, i.e., if internal soundness is preferable, material molding time is very long, substantially reduces production efficiency, can not be complete in a short time
At the quick preparation of material;, whereas if shortening forming time, that is, be molded the period, then composite material sweeps along bubble, infiltration not
The internal flaws such as good obviously increase, and are unable to ensure the excellent of interiors of products quality.In addition, especially preparing the vacuum of large-scale product
Instillation process more directly faces the above problem.Therefore, how the short time, low cost under the conditions of complete polymer matrix composites
Quick manufacture, and under the premise of ensureing quickly manufacture, it is multiple at present for how ensuring that the internal soundness of product still maintains excellent
Condensation material manufacturing field urgent problem to be solved.
Invention content
It is an object of the invention to be directed to the deficiencies in the prior art, a kind of preparation of polymer matrix composites is proposed
Method.
Technical solution of the invention is as follows:
On the one hand,
The present invention provides a kind of preparation method of polymer matrix composites, is realized by following steps:
Reinforcing material fiber cloth is divided into several thin layer elements, each thin layer element by step 1 as unit of certain number of plies
It is respectively placed in after sealing in vacuum inner bag, and in the pre-buried injected rubber hose in vacuum inner bag both ends and goes out sebific duct;
Step 2 is placed the above-mentioned several thin layer elements handled well by ply stacking-sequence, is placed in vacuum Over-bag;
Step 3, temperature be less than vacuum inner bag melting temperature and non-pressurized vacuum Over-bag under the conditions of, to each
Thin layer element vacuumized, injecting glue, until the infiltration of each unit finishes;
Step 4, when each unit infiltrate after, vacuum Over-bag is vacuumized, injecting glue, and to each thin layer element
Heating is until temperature is more than the melting temperature of vacuum inner bag, and keeps the temperature a period of time;
Step 5, vacuum Over-bag stop injecting glue, heating, solidification and demoulding.
Further, the injecting glue refers to injection thermosetting resin adhesive;
Further, the vacuum inner bag material is thermoplastic resin, and its melting temperature t meets:The heat of injecting glue
The thermosetting resin gel point temperature of -20 DEG C of thermosetting resin gel point temperature≤t≤injecting glue, can ensure itself and thermosetting in this way
Property resin can dissolve each other in the molten state;
Preferably, the thickness of the vacuum inner bag is not more than 0.1mm.
Further, the melting temperature of the vacuum Over-bag is higher than temperature when curing in step 5.
Further, the scrim cloth in each thin layer element is preferably no more than 20 layers.
Further, the method for thin layer element sealing can material this field routine mode, such as hot melt gun seals.
Further, in the step 5, heating, solidification and demoulding are the usual manner that this field handles prefabricated component.
On the other hand,
The present invention also provides a kind of polymer matrix composites, the composite material is using thermosetting resin as matrix, with fiber
Cloth is reinforcing material, and carries out toughening to described matrix using thermoplastic resin, and the thermoplastic resin incorporation way is:First will
Reinforcing material fiber cloth is divided into several thin layer elements as unit of certain number of plies, and heat is respectively placed in after each thin layer element sealing
In vacuum inner bag made from plastic resin, wherein each unit is separately formed, and is placed in vacuum Over-bag by ply stacking-sequence
In, and under melting temperature of the temperature less than vacuum inner bag, thermosetting resin adhesive, the thin layer are injected to each thin layer element
After unit presoaks, by heating by vacuum inner bag melting until thin layer element disappears, and is added using vacuum Over-bag
Pressure is so that the thermoplastic resin and thermosetting resin are mixed.
Further, the melting temperature t of the thermoplasticity resin meets:- 20 DEG C≤t of thermosetting resin gel point temperature
≤ thermosetting resin gel point temperature.
Preferably, the thickness of the vacuum inner bag is not more than 0.1mm.
Further, the scrim cloth in each thin layer element is preferably no more than 20 layers.
Further, also it is perfused with thermosetting resin adhesive in the vacuum Over-bag.
Furthermore
The present invention also provides a kind of vacuum bags, are used for the molding of polymer matrix composites, the vacuum bag includes vacuum bag
Outer bag and inner bag, the vacuum inner bag material be thermoplastic resin, inside thermosetting resin adhesive can be perfused, pass through select institute
It states the melting temperature t of thermoplastic resin and so that the thermoplastic resin and thermosetting resin adhesive is carried out by the heating of vacuum Over-bag
Mixing, wherein the melting temperature t of the thermoplasticity resin meets:- 20 DEG C of thermosetting resin gel point temperature≤t≤thermosetting
Property resin gel glue point temperature.
Further, the thickness of the vacuum inner bag is not more than 0.1mm.
Further, the thermosetting resin adhesive also uses reinforcing material fiber cloth to be enhanced, and the fiber cloth is with one
Given layer number is that unit is divided into several thin layer elements, is respectively placed in the vacuum inner bag after each thin layer element sealing,
In, each unit is separately formed, and is placed in vacuum Over-bag by ply stacking-sequence;
It further, will be in temperature less than vacuum inner bag when perfusion thermosetting resin adhesive inside the vacuum inner bag
It is carried out under melting temperature;
Further, also it is perfused with thermosetting resin adhesive in the vacuum Over-bag;
Further, the process that the thermoplastic resin and thermosetting resin are mixed is:Above-mentioned thin layer element preimpregnation
After, by heating by vacuum inner bag melting until thin layer element disappears, and vacuum Over-bag is used to pressurize so that institute
It states thermoplastic resin and thermosetting resin is mixed.
The design principle of the present invention is:
The fusion theory of the thought of microcosmic manufacture, the means of Layered manufacturing and microcosmic resin is combined together by the present invention,
It proposes a kind of quick, low cost manufacturing manufacturing method, is melted at high temperature with thermosetting resin according to thermoplastic resin, is mixed
It closes, eventually forms the characteristic of " island " structure, specially:Using " microcosmic manufacture, quickly infiltration on thickness, after by thin layers "
Design philosophy, high thickness product is separated into each junior unit, is gradually manufactured, can reach microcosmic manufacture from macroscopically seeing;
Then each unit is combined together again by mode of heating, realizes the superposition of thin layer element, that is, propose to be different from existing skill
Prefabricated component is also isolated last melting and disappeared by two bags of methods of art, inner bag layer by layer while supercharging, and as one of resin matrix
Point, and the thickness of thin layer element is the quantity by laying, can be measured in advance;After thin layer element infiltrates, fiber is
All it is impregnated with;It after temperature raising, plastic melt, is mutually mixed with thermosetting resin, the nonwettable problem of fiber is not present,
Plastic molten melt is mutually mixed with thermosetting resin simultaneously, can be dissolved each other on microcosmic, be achieved the effect that microcosmic toughening.
The advantageous effect of the present invention compared with the existing technology:
The method of the present invention improves the interlayer toughened of same with thermosetting compound material, can be separated into complicated structure type
Simple thin layer element realizes big thickness, the quick manufacture of large scale product and low cost manufacturing;The invention simultaneously is also micro-
The one kind for seeing manufacture, is divided into several thin layer elements by big thickness, the effect of impregnation of fiber is ensure that under microstate, effectively
Discharge interfascicular and beam in air, reduce voidage content, improve interiors of products quality and bearing capacity, while separating fritter
Afterwards, wetting velocity increases, and shaping speed is obviously shortened, and also can guarantee internal infiltration quality.The invention effectively introduces heat
Plastic resin has carried out toughening modifying to reinforcedathermoset matrices, improves the shock resistance lesion capability of product, extends the use of product
The time limit.The invention will provide a new way for the manufacture of large-sized composite material product.
Description of the drawings
Fig. 1 is a kind of embodiment process flow chart of the preparation method of polymer matrix composites provided by the invention;
Fig. 2 is each thin layer element design diagram in the preparation method of polymer matrix composites provided by the invention.
Specific implementation mode
Below in conjunction with attached drawing and specific example, the present invention is described in detail.
Referring to Fig. 1, a kind of embodiment process flow chart of the preparation method of polymer matrix composites provided by the invention, tool
Body is:
Embodiment 1
The preparation of epoxy base carbon fiber composite material product
The product requires thickness in 80mm, the use of dry carbon cloth is reinforcing material, and 240 DEG C of cured epoxy resin are base
Body.Carbon cloth needs to lay 300 layers;
The selection of vacuum bag, the solidification temperature of reference resin select melting temperature in 190 DEG C, the grafting of thickness 0.05mm
Modified polypropylene film is inner bag, selects heat safe Kapton for outer bag;
Laying is isolated, 30 units are prepared altogether with 10 layers of carbon cloth for a thin layer element referring to the design diagram of Fig. 2;
Each unit is sealed with hot melt gun, and distinguishes a pre-buried injected rubber hose and vacuum tube at both ends;Finally by all thin layer lists
Member is placed by ply stacking-sequence, is sealed with outer bag, equally to be distinguished pre-buried injected rubber hose and vacuum tube at both ends;
Resin temperature and thin layer element are risen to 120 DEG C by unit priming by vacuum, start to vacuumize, encapsulating, until entire single
Member infiltration finishes;
Heating, vacuumizes outer bag, injecting glue, while heating up to elementary layer group, until 210 DEG C of heat preservation 10min;
Entire prefabricated component is warming up to 240 DEG C, keeps the temperature 1.5h by elevated cure, demoulding;It waits for that temperature is down to room temperature, demoulds.
Preparation method provided in this embodiment, infiltrating time are down to original half, shorten entire molding time;
Interiors of products quality is improved, and probability of occurrence the defects of internal dry spot, stomata is down to original one third, improves production
The quality of product also eliminates the repairing time of product.
Embodiment 2
The preparation of polyimide resin base carbon fiber composite material product
The product requires thickness in 50mm, the use of dry carbon cloth is reinforcing material, and 260 DEG C of cured polyimide resins are
Matrix.Carbon cloth needs to lay 200 layers.
The selection of vacuum bag, the solidification temperature of reference resin select melting temperature in 110 DEG C, the grafting of thickness 0.05mm
Modified polypropylene film is inner bag, selects heat safe Kapton for outer bag;
Laying is isolated, 20 units are prepared altogether with 10 layers of carbon cloth for a thin layer element referring to the design diagram of Fig. 2;
Each unit is sealed with hot melt gun, and distinguishes a pre-buried injected rubber hose and vacuum tube at both ends;Finally by all thin layer lists
Member is placed by ply stacking-sequence, is sealed with outer bag, equally to be distinguished pre-buried injected rubber hose and vacuum tube at both ends;
Resin temperature and thin layer element are risen to 180 DEG C (polyimide resin viscosity is relatively low at this time) by unit priming by vacuum,
Start to vacuumize, encapsulating, until the infiltration of entire unit finishes;
Heating, vacuumizes outer bag, injecting glue, while heating up to elementary layer group, until 240 DEG C of heat preservation 10min;
Entire prefabricated component is warming up to 260 DEG C, keeps the temperature 1h by elevated cure, demoulding;It waits for that temperature is down to room temperature, demoulds.
The defects of product manufactured in the present embodiment, internal dry spot, stomata is the half of traditional handicraft, effectively will be interior
Portion's small molecule and air discharge, improve the quality of product.A new way is provided for the moulding process of high performance resin.
Unspecified part of the present invention is known to the skilled person technology.
Claims (10)
1. a kind of preparation method of polymer matrix composites, which is characterized in that realized by following steps:
Reinforcing material fiber cloth is divided into several thin layer elements, each thin layer element sealing by step 1 as unit of certain number of plies
After be respectively placed in vacuum inner bag, and the pre-buried injected rubber hose in vacuum inner bag both ends and going out sebific duct;
Step 2 is placed the above-mentioned several thin layer elements handled well by ply stacking-sequence, is placed in vacuum Over-bag;
Step 3, temperature be less than vacuum inner bag melting temperature and non-pressurized vacuum Over-bag under the conditions of, to each thin layer
Unit vacuumized, injecting glue, until the infiltration of each unit finishes;
Step 4, when each unit infiltrate after, vacuum Over-bag is vacuumized, injecting glue, and to each thin layer element heat up
Until temperature is more than the melting temperature of vacuum inner bag, and keep the temperature a period of time;
Step 5, vacuum Over-bag stop injecting glue, heating, solidification and demoulding.
2. a kind of preparation method of polymer matrix composites according to claim 1, which is characterized in that in the vacuum bag
Bag material is thermoplastic resin, and its melting temperature t meets:- 20 DEG C of thermosetting resin gel point temperature≤t≤note of injecting glue
The thermosetting resin gel point temperature of glue.
3. a kind of preparation method of polymer matrix composites according to claim 1-2, which is characterized in that the vacuum bag
The thickness of inner bag is not more than 0.1mm.
4. a kind of preparation method of polymer matrix composites according to claim 1, which is characterized in that outside the vacuum bag
The melting temperature of bag is higher than the temperature when solidification in step 5.
5. a kind of preparation method of polymer matrix composites according to claim 1-4, it is characterised in that:It is described each thin
Scrim cloth in layer unit is preferably no more than 20 layers.
6. a kind of polymer matrix composites, it is characterised in that:The composite material is using thermosetting resin as matrix, with fiber cloth
Reinforcing material, and toughening is carried out to described matrix using thermoplastic resin, the thermoplastic resin incorporation way is:It first will enhancing
Material fiber cloth is divided into several thin layer elements as unit of certain number of plies, and thermoplasticity is respectively placed in after each thin layer element sealing
In vacuum inner bag made from resin, wherein each unit is separately formed, and is placed in vacuum Over-bag by ply stacking-sequence, and
Under melting temperature of the temperature less than vacuum inner bag, thermosetting resin adhesive, the thin layer element are injected to each thin layer element
After preimpregnation, by heating by vacuum inner bag melting up to thin layer element disappearance, and made using the pressurization of vacuum Over-bag
It obtains the thermoplastic resin and thermosetting resin is mixed.
7. a kind of polymer matrix composites according to claim 6, it is characterised in that:The melting of the thermoplasticity resin
Temperature t meets:- 20 DEG C of thermosetting resin gel point temperature≤t≤thermosetting resin gel point temperature.
8. a kind of vacuum bag, is used for the molding of polymer matrix composites, the vacuum bag includes vacuum Over-bag and inner bag, spy
Sign is:The vacuum inner bag material is thermoplastic resin, inside thermosetting resin adhesive can be perfused, pass through and select the heat
The melting temperature t of plastic resin and by vacuum Over-bag heating so that the thermoplastic resin and thermosetting resin adhesive is mixed
It closes, wherein the melting temperature t of the thermoplasticity resin meets:- 20 DEG C of thermosetting resin gel point temperature≤t≤thermosetting property
Resin gel glue point temperature.
9. a kind of vacuum bag according to claim 8, it is characterised in that:The thermosetting resin adhesive also uses reinforcing material
Fiber cloth is enhanced, and the fiber cloth is divided into several thin layer elements, each thin layer element sealing as unit of certain number of plies
After be respectively placed in the vacuum inner bag, wherein each unit is separately formed, and is placed in vacuum Over-bag by ply stacking-sequence
In.
10. a kind of vacuum bag according to claim 8, it is characterised in that:Thermosetting property is perfused inside the vacuum inner bag
It to be carried out under melting temperature of the temperature less than vacuum inner bag when resin glue.
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Publication number | Priority date | Publication date | Assignee | Title |
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CN113021940A (en) * | 2021-02-26 | 2021-06-25 | 上海晋飞碳纤科技股份有限公司 | Hand-pasted die pressing vacuum auxiliary forming die and forming process |
CN113173285A (en) * | 2021-05-24 | 2021-07-27 | 上海超硅半导体有限公司 | Packaging method of silicon wafer |
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