CN106113525A - A kind of polyimide fiber strengthens the preparation method of polymer matrix composites Herba Veronicastri - Google Patents
A kind of polyimide fiber strengthens the preparation method of polymer matrix composites Herba Veronicastri Download PDFInfo
- Publication number
- CN106113525A CN106113525A CN201610513398.8A CN201610513398A CN106113525A CN 106113525 A CN106113525 A CN 106113525A CN 201610513398 A CN201610513398 A CN 201610513398A CN 106113525 A CN106113525 A CN 106113525A
- Authority
- CN
- China
- Prior art keywords
- preparation
- polyimide fiber
- prepreg
- herba veronicastri
- die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2279/00—Use of polymers having nitrogen, with or without oxygen or carbon only, in the main chain not provided for in groups B29K2261/00 - B29K2277/00, as reinforcement
- B29K2279/08—PI, i.e. polyimides or derivatives thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/70—Agricultural usage or equipment
- B29L2031/7002—Agricultural usage or equipment for fishing
Abstract
The invention discloses a kind of polyimide fiber and strengthen the preparation method of polymer matrix composites Herba Veronicastri, it is characterised in that the method includes the steps of: a. prepares the preparation of the rod-like die of Herba Veronicastri；The preparation of the resin base prepreg that b polyimide fiber strengthens；C. the resin tight paving of base prepreg strengthened by described polyimide fiber, in rod-like die surface, is then compacted into instrument, drains the gas of the inside；D. whole assembly is carried out evacuation process, under high-temperature and high-pressure conditions, carries out cured the most again；E. take out polyimide fiber composite product and work through row post processing.Herba Veronicastri prepared by the method can not only meet high-end Herba Veronicastri to intensity and the demand of modulus, can also save technique simultaneously, reduce raw material and manufacturing cost.
Description
Technical field
Herba Veronicastri field of the present invention, particularly relates to a kind of fiber-reinforced resin matrix compound material and prepares the technique skill of Herba Veronicastri
Art field.
Background technology
The material of existing Herba Veronicastri itself has glass fibre and two kinds of carbon fiber, and the material currently mainly used is that carbon is fine
Dimension.And carbon fiber is different according to coefficient of elasticity modulus, it is divided into low modulus and high-modulus etc..The carbon fiber good toughness of low modulus, jail
Soundness is high, but rigidity is poor, Heavy Weight；And high modulus carbon fiber is lightweight, rigidity is strong, but firmness is the highest, crisp, easily break.
According to the technology of these manufacture Herba Veronicastris existing, the low technique compared for those costs, use as main
Glass fibre is as reinforcing material, and paving mode is the most single, and the intensity of the Herba Veronicastri of general output and modulus all ratios are relatively low；
And the Herba Veronicastri of those high-strength and high-modulus, the most all use carbon fiber costly as reinforcing material, and have complex
Paving technique, consequently, it is possible to manufacturing cost is the highest.
Summary of the invention
Present invention employs a kind of special fibre reinforced materials polyimide fiber.Concrete manufacturing process is as follows:
A. the preparation of the rod-like die of Herba Veronicastri is prepared；The preparation of the resin base prepreg that b polyimide fiber strengthens；c.
The resin tight paving of base prepreg strengthened by described polyimide fiber, in rod-like die surface, is then pressed with instrument
Real, drain the gas of the inside；D. whole assembly is carried out evacuation process, carry out at solidification under high-temperature and high-pressure conditions the most again
Reason；E. take out polyimide fiber composite product and work through row post processing.
For above technical scheme, further preferred feature is, described prepreg is unidirectional pre-immersion material, described pre-
In leaching material, the mass fraction of polyimide fiber is 50%～80%.
Further, described prepreg paving two-layer, two-layer prepreg phase direction is vertical mutually, and the most any one layer and mould
Tool axially becomes 45 degree of angles.
Further, described solidification process includes: solidify 1.5h～2.5h at 100 DEG C～120 DEG C, the most again 140
DEG C～160 DEG C at solidify 2.5h～3.5h, solidify 2.5h～3.5h the most again at 180 DEG C～200 DEG C, be finally cooled to room temperature again
Take out.
Further, in described vacuum pumping, vacuum is evacuated to more than 0.5～0.9 atmospheric pressure.
Further, in described pressurized operation, pressing force is 0.5～1.0 atmospheric pressure.
Further, described last handling process includes: cut by certain length specification, to the bur on surface,
Burr etc. are polished, and finally carry out the surfacecti proteon work such as surface paint spraying and baking.
Further, described numerical value matrix is epoxy resin-base.
Further, described rod-like die is metal die.
Further, described mould is composite material mould.
The beneficial effects of the present invention is: compared to existing Herba Veronicastri manufacturing process, manufactured by the technical program
Composite Herba Veronicastri can not only meet high-end class Herba Veronicastri to intensity and the requirement of modulus, meanwhile, compared to carbon fiber etc.
Reinforcing material, the manufacturing cost of polyimide fiber is significant lower, and the shear strength of polyimides relatively carbon fiber is high simultaneously, paving
Paste in design technology relatively simple.
Detailed description of the invention
The present embodiment utilizes a kind of polyimide fiber enhancing polymer matrix composites to prepare Herba Veronicastri.Because polyamides is sub-
Amine has the excellent properties such as the feature of high-strength and high-modulus, the most also acid and alkali-resistance, resistance to sunlight irradiation, is the most excellent reinforcing material.
For this manufacturing process:
First being by the preparation of mould, mould here requires to bear higher temperature and pressure, because of
It is intended under certain temperature and pressure solidify for final composite Herba Veronicastri.Therefore the most typically can be selected for metal
Mould, metal die can not only bear higher temperature and pressure, and precision is high simultaneously, and repeat usage is high.In addition can also select
Select more secondary composite material mould.
2. preparing the resin base prepreg that corresponding polyimides strengthens, the resin matrix used by this prepreg can be epoxy
Resin, for current technology, epoxy resin application in the composite the most quite maturation, and its each side
Combination property is the most excellent.The preferably unidirectional prepreg of this prepreg, so can save the cost of fiber, simultaneously in preimpregnation
In material, the mass fraction of polyimide fiber should be maintained at 50%～80%, if resin content is too high, and prepared fishing out
Fishing rod can be more crisp, so that toughness is not enough, is easily broken off.
3. it is followed by the paving technique of prepreg, for carbon fiber prepreg, because its shear strength is the most crisp
Weak, so its paving design is the most extremely complex, polyimide fiber is the most just the opposite, and the shearing of polyimide fiber is strong
Degree is the highest, so typically need not specialized designs to go out to make up its paving layer shearing deficiency when paving designs.So, this
Scheme can directly use two layers of unidirectional prepreg, and two-layer prepreg is mutually perpendicular to, and the most any one layer and rod-like die axle
To becoming 45 degree of angles.The most also need, by real for each lamination, to drain the gas of the inside as far as possible, be so favorably improved the cause of final products
Close property.
4. pair whole product carries out evacuation process, and wherein vacuum is maintained at 0.5～0.9 atmospheric pressure, then carries out
Cure under pressure, pressing force is 0.5～1.0 atmospheric pressure.Then carry out the solidification of point step high temperature, specific as follows: at 100 DEG C～
Solidification 1.5h～2.5h at 120 DEG C, the most again solidification 2.5h～3.5h at 140 DEG C～160 DEG C, 180 DEG C～200 DEG C the most again
Lower solidification 2.5h～3.5h, is finally cooled to room temperature and further takes out.
5. the product after pair solidification carries out post processing, and the step of this post processing generally comprises: enter by certain length specification
The bur on surface, burr etc. are polished, are finally carried out the surfacecti proteon work such as surface paint spraying and baking by row cutting.
The Herba Veronicastri that preparation method as above prepares, can not only meet high-end Herba Veronicastri to intensity and modulus
Requirement, operation is relatively simple simultaneously, and production cost is relatively low, has stronger market value.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (10)
1. the preparation method of a polyimide fiber enhancing polymer matrix composites Herba Veronicastri, it is characterised in that the method bag
Containing following steps:
A. the preparation of the rod-like die of Herba Veronicastri is prepared；The preparation of the resin base prepreg that b polyimide fiber strengthens；C. by institute
State polyimide fiber strengthen the resin tight paving of base prepreg in rod-like die surface, be then compacted into instrument, row
The gas of the inside to the greatest extent；D. whole assembly is carried out evacuation process, under high-temperature and high-pressure conditions, carries out cured the most again；E. take
Go out polyimide fiber composite product and work through row post processing.
2. preparation method as claimed in claim 1, it is characterised in that described prepreg is unidirectional pre-immersion material, described prepreg
The mass fraction of middle polyimide fiber is 50%～80%.
3. preparation method as claimed in claim 2, it is characterised in that described prepreg paving two-layer, two-layer prepreg side mutually
To the most vertical, and the most any one layer axially becomes 45 degree of angles with mould.
4. preparation method as claimed in claim 3, it is characterised in that described solidification process includes: at 100 DEG C～120 DEG C
Solidification 1.5h～2.5h, solidifies 2.5h～3.5h the most again at 140 DEG C～160 DEG C, solidifies at 180 DEG C～200 DEG C
2.5h～3.5h, is finally cooled to room temperature and further takes out.
5. preparation method as claimed in claim 4, it is characterised in that in described vacuum pumping, vacuum is evacuated to more than 0.5
～0.9 atmospheric pressure.
6. preparation method as claimed in claim 5, it is characterised in that in described pressurized operation, pressing force is 0.5～1.0
Individual atmospheric pressure.
7. preparation method as claimed in claim 4, it is characterised in that described last handling process includes: by certain length
Specification is cut, and polishes the bur on surface, burr etc., finally carries out the surfacecti proteon work such as surface paint spraying and baking.
8. the preparation method told such as claim 7, it is characterised in that described numerical value matrix is epoxy resin-base.
9. preparation method as claimed in claim 7, it is characterised in that described rod-like die is metal die.
10. preparation method as claimed in claim 8, it is characterised in that described mould is composite material mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610513398.8A CN106113525A (en) | 2016-06-30 | 2016-06-30 | A kind of polyimide fiber strengthens the preparation method of polymer matrix composites Herba Veronicastri |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610513398.8A CN106113525A (en) | 2016-06-30 | 2016-06-30 | A kind of polyimide fiber strengthens the preparation method of polymer matrix composites Herba Veronicastri |
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| Publication Number | Publication Date |
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| CN106113525A true CN106113525A (en) | 2016-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610513398.8A Pending CN106113525A (en) | 2016-06-30 | 2016-06-30 | A kind of polyimide fiber strengthens the preparation method of polymer matrix composites Herba Veronicastri |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111923441A (en) * | 2020-08-26 | 2020-11-13 | 中国航空工业集团公司济南特种结构研究所 | Preparation method of high-temperature-resistant polyimide resin-based composite material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295918A (en) * | 1999-11-10 | 2001-05-23 | 金颂企业股份有限公司 | Vacuum formation method for compound material pipe fitting |
| CN1468904A (en) * | 2002-07-02 | 2004-01-21 | ͨ�õ�����˾ | Heat convertible composition containing poly (arylidene ether), its producing process and products thereby |
-
2016
- 2016-06-30 CN CN201610513398.8A patent/CN106113525A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295918A (en) * | 1999-11-10 | 2001-05-23 | 金颂企业股份有限公司 | Vacuum formation method for compound material pipe fitting |
| CN1468904A (en) * | 2002-07-02 | 2004-01-21 | ͨ�õ�����˾ | Heat convertible composition containing poly (arylidene ether), its producing process and products thereby |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111923441A (en) * | 2020-08-26 | 2020-11-13 | 中国航空工业集团公司济南特种结构研究所 | Preparation method of high-temperature-resistant polyimide resin-based composite material |
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