CN115852589A - Composite curing felt and preparation process thereof - Google Patents
Composite curing felt and preparation process thereof Download PDFInfo
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- CN115852589A CN115852589A CN202211620927.6A CN202211620927A CN115852589A CN 115852589 A CN115852589 A CN 115852589A CN 202211620927 A CN202211620927 A CN 202211620927A CN 115852589 A CN115852589 A CN 115852589A
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- felt
- carbon fiber
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- fiber net
- curing
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- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 49
- 239000004917 carbon fiber Substances 0.000 claims abstract description 49
- 239000010410 layer Substances 0.000 claims abstract description 45
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002344 surface layer Substances 0.000 claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 20
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 18
- 239000010439 graphite Substances 0.000 claims abstract description 18
- 239000004744 fabric Substances 0.000 claims abstract description 13
- 238000010000 carbonizing Methods 0.000 claims abstract description 6
- 238000007598 dipping method Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000003763 carbonization Methods 0.000 claims description 3
- 238000005087 graphitization Methods 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000001467 acupuncture Methods 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 7
- 238000003754 machining Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 239000003575 carbonaceous material Substances 0.000 abstract description 2
- 238000001723 curing Methods 0.000 description 30
- 239000000835 fiber Substances 0.000 description 4
- 238000004080 punching Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
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Abstract
The invention discloses a composite curing felt and a preparation process thereof, belonging to the technical field of carbon materials, wherein the curing felt comprises an upper surface layer and a lower surface layer which are made of graphite paper or carbon cloth, wherein a paving layer which is needled by a needling machine is arranged between the upper surface layer and the lower surface layer, the paving layer comprises carbon fiber net tires and low-density soft felts which are alternately paved, the uppermost end and the lowermost end of the paving layer are respectively provided with the low-density soft felt, and bonding layers are respectively arranged between the low-density soft felt and the carbon fiber net tires and between the carbon fiber net tires and the upper surface layer and between the carbon fiber net tires and the lower surface layer. The preparation process comprises the following steps: s1, paving materials; s2, needling; s3, dipping and curing; s4, carbonizing and graphitizing; and S5, forming. The composite curing felt prepared by the process not only solves the problem of poor machining precision of the whole felt, but also solves the problem of poor heat insulation of the laminated curing felt caused by high density, and the structural form has the advantages of higher competitiveness and superiority, complete whole function and strong practicability.
Description
Technical Field
The invention relates to the technical field of carbon materials, in particular to a composite curing felt and a preparation process thereof.
Background
The curing felts currently available on the market are divided into two types, namely an integral curing felt and a laminated curing felt. The integral curing felt is generally prepared by the steps of preparing a net blank by short-cutting and lapping carbon fiber filaments, then carrying out needle punching forming, then impregnating resin, carrying out thermocuring, and then carbonizing and graphitizing; the laminated curing felt is prepared by impregnating soft felt (carbon felt and graphite felt) with resin, thermally curing, carbonizing and graphitizing. Both of these cured mats have their own advantages and disadvantages in view of the two different processes.
The integral curing felt is made directly of high-strength carbon fibers, so that the structural strength of the integral curing felt is high. And because the carbon fiber has higher modulus, the fiber arrangement density is lower during needling, the structural pores are larger, and the density is lower, so the heat insulation performance is better. The whole needle punching molding is not easy to layer; the disadvantage is that the compactness is insufficient due to the lower density and therefore the machining accuracy is not high. Meanwhile, the carbon fiber yarn is used as a raw material, so that the price is relatively high.
The laminated curing felt is directly made by laminating soft felts (carbon felts and graphite felts) layer by layer, and the needling density of the soft felts (carbon felts and graphite felts) is easy to improve because the prior process raw materials (polyacrylonitrile fibers or preoxidized fiber) are relative to carbon fibers, so that the laminated curing felt has higher density, higher compactness and higher machining precision. The disadvantages are due to the higher density, smaller structural gaps, and lower thermal insulation compared to the bulk cured felt. Moreover, the laminated cured felt is formed by bonding a layer of soft felt (carbon felt and graphite felt) by a resin, so that the layering phenomenon is easy to occur. Generally, in order to increase interlayer adhesiveness, graphite paper is added between layers (actually, the graphite paper itself prepared by pressing expanded graphite is also layered), but the thermal conductivity of the graphite paper itself is relatively good, and the heat insulation performance is reduced by using a large amount of graphite paper. Meanwhile, because the fibers of the soft felt are not high in strength of the integrally solidified carbon fibers of the felt, carbon cloth is generally added between the surface and even two layers of the soft felt to increase the strength, so that the compact structure further reduces the heat insulation effect.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a composite cured felt and a preparation process thereof, the composite cured felt prepared by the process solves the problem of poor machining precision of the whole felt and the problem of poor heat insulation of laminated cured felt caused by high density, and the structural form has more competitiveness and advantage.
In order to solve the technical problems, the invention aims to realize that: the invention relates to a composite curing felt which comprises an upper surface layer and a lower surface layer, wherein the upper surface layer and the lower surface layer are made of graphite paper or carbon cloth, a paving layer subjected to needling by a needle machine is arranged between the upper surface layer and the lower surface layer, the paving layer comprises carbon fiber net tires and low-density soft felts which are alternately paved, the uppermost end and the lowermost end of the paving layer are respectively provided with the low-density soft felts, and bonding layers are respectively arranged between the low-density soft felts and the carbon fiber net tires, between the carbon fiber net tires and the upper surface layer and between the carbon fiber net tires and the lower surface layer.
The invention is further configured to: the carbon fiber net tire contains carbon cloth.
The invention also relates to a preparation process of the composite curing felt, which comprises the following steps:
s1, paving: taking a set amount of carbon fiber net tires and low-density soft felts as required, alternately laying the carbon fiber net tires and the low-density soft felts, and ensuring that the uppermost layer and the lowermost layer of the laying material are both low-density soft felts;
s2, needling: selecting a T300-grade or T700-grade carbon fiber yarn on the vertical surface to carry out needling on the carbon fiber yarn, wherein the needling depth penetrates through the spreading layer;
s3, dipping and curing: impregnating resin into the needled composite curing felt, curing, and sticking a graphite paper or carbon cloth on the surface to obtain an upper surface layer and a lower surface layer;
s4, carbonization and graphitization: carbonizing and graphitizing the solidified felt body, removing resin and improving the carbon content;
s5, forming: and (4) cutting burrs of the manufactured composite curing felt, and processing and forming.
The invention is further configured to: in step S1, the number of the carbon fiber net tires is 10 to 50 layers.
In conclusion, the invention has the following beneficial effects:
1. because the middle layer and the vertical surfaces are both made of high-strength carbon fibers, the structural strength of the cured felt is high;
2. the needling carbon fibers in the vertical direction of the carbon fibers make up the problem that the density of the low-density soft felt is too low, so that the compactness of the surface layer is higher than that of the whole cured felt, the machining precision is improved, and the problem of the machining precision of the whole felt is solved;
3. because the intermediate layer is still in the structural form of the integral curing felt in the form of the carbon fiber net tire and the density is lower, the integral heat insulation performance is obviously improved compared with that of the laminated curing felt;
4. because the carbon fibers are still needled in the vertical plane, the layers are not bonded by resin as the laminated curing felt is bonded by the whole curing felt, and are not easy to delaminate. Meanwhile, graphite paper is not needed to be used between layers to increase the adhesion, so that the thermal conductivity is reduced;
5. because of the use of the soft felt, the use amount of the carbon fiber is reduced, the cost is lower than that of the whole curing felt, and certain price advantage is achieved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the present invention.
Detailed Description
For a better understanding of the technical solutions of the present invention, the following preferred embodiments of the present invention are described in conjunction with the specific examples, but it should be understood that the descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the patent claims of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention will be further described with reference to the accompanying drawings and preferred embodiments.
Example 1
Referring to fig. 1, the composite curing felt according to the embodiment includes an upper surface layer 1 and a lower surface layer 2 made of graphite paper or carbon cloth, a paving layer needled by a needle machine is disposed between the upper surface layer 1 and the lower surface layer 2, the paving layer includes carbon fiber net tires 3 and low-density soft felts 4 alternately laid, the uppermost end and the lowermost end of the paving layer are both low-density soft felts 4, and bonding layers (not shown in the figure) are disposed between the low-density soft felts 4 and the carbon fiber net tires 3, and between the carbon fiber net tires 3 and the upper surface layer 1 and the lower surface layer 2; the number of the carbon fiber net tires 3 is one layer.
Further, the carbon fiber net tire 3 contains carbon cloth.
Example 2
Referring to fig. 2, the composite curing felt according to the embodiment includes an upper surface layer 1 and a lower surface layer 2 made of graphite paper or carbon cloth, a paving layer needled by a needle machine is disposed between the upper surface layer 1 and the lower surface layer 2, the paving layer includes carbon fiber net tires 3 and low-density soft felts 4 alternately laid, the uppermost end and the lowermost end of the paving layer are both low-density soft felts 4, and bonding layers (not shown in the figure) are disposed between the low-density soft felts 4 and the carbon fiber net tires 3, and between the carbon fiber net tires 3 and the upper surface layer 1 and the lower surface layer 2; the number of the carbon fiber net tires 3 is two.
Further, the carbon fiber net tire 3 contains carbon cloth.
The invention also relates to a preparation process of the composite curing felt, which comprises the following steps:
s1, paving: taking a set amount of carbon fiber net tires and low-density soft felts as required, alternately laying the carbon fiber net tires and the low-density soft felts, and ensuring that the uppermost layer and the lowermost layer of the laying material are both low-density soft felts; in the laying process, an adhesive layer is arranged between the carbon fiber net tire and the low-density soft felt;
s2, needling: selecting a T300-grade or T700-grade carbon fiber yarn on a needling machine to carry out needling on the vertical surface, wherein the needling depth penetrates through the spreading layer;
s3, dipping and curing: impregnating the needled composite curing felt with resin, curing, and sticking a graphite paper or carbon cloth on the surface to obtain an upper surface layer and a lower surface layer;
s4, carbonization and graphitization: carbonizing and graphitizing the solidified felt body to remove resin and improve the carbon content;
s5, forming: and (4) cutting burrs of the manufactured composite curing felt, and processing and forming.
Further, in step S1, the number of the carbon fiber net tires is 10 to 50 layers.
Unless otherwise specified, in the present invention, if the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the actual shown orientation or positional relationship, it is only for convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, therefore, the terms describing the orientation or positional relationship in the present invention are only used for exemplary illustration and are not to be construed as limiting the patent, and the specific meaning of the above terms can be understood according to the specific situation by a person skilled in the art in conjunction with the embodiments.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; the connection may be direct or indirect through an intermediate medium, and the connection may be internal to the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (4)
1. The utility model provides a compound solidification felt which characterized in that, includes the top layer and the lower top layer that make by graphite paper or carbon cloth, be equipped with the bed course that accomplishes the acupuncture through the needle loom between top layer and the lower top layer, the bed course is including the carbon fiber net child and the soft felt of low density of laying in turn, the top and the lower extreme of bed course are the soft felt of low density, all be equipped with the bond line between low density soft felt and carbon fiber net child, carbon fiber net child and top layer and lower top layer.
2. The composite cured felt according to claim 1, wherein the carbon fiber mesh tire contains a carbon cloth therein.
3. A process for preparing a composite consolidated felt according to claim 1 or 2, comprising the steps of:
s1, paving: taking a set amount of carbon fiber net tires and low-density soft felts as required, alternately laying the carbon fiber net tires and the low-density soft felts, and ensuring that the uppermost layer and the lowermost layer of the laying material are both low-density soft felts;
s2, needling: selecting a T300-grade or T700-grade carbon fiber yarn on a needling machine to carry out needling on the vertical surface, wherein the needling depth penetrates through the spreading layer;
s3, dipping and curing: impregnating resin into the needled composite curing felt, curing, and sticking a graphite paper or carbon cloth on the surface to obtain an upper surface layer and a lower surface layer;
s4, carbonization and graphitization: carbonizing and graphitizing the solidified felt body to remove resin and improve the carbon content;
s5, forming: and (4) cutting burrs of the manufactured composite curing felt, and processing and forming.
4. The process for preparing a composite cured felt according to claim 3, wherein in step S1, the number of the carbon fiber net is 10 to 50 layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211620927.6A CN115852589A (en) | 2022-12-16 | 2022-12-16 | Composite curing felt and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211620927.6A CN115852589A (en) | 2022-12-16 | 2022-12-16 | Composite curing felt and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115852589A true CN115852589A (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211620927.6A Pending CN115852589A (en) | 2022-12-16 | 2022-12-16 | Composite curing felt and preparation process thereof |
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| Country | Link |
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| CN (1) | CN115852589A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575400A (en) * | 2009-10-06 | 2012-07-11 | 西格里碳素欧洲公司 | Composite material comprising soft carbon fiber felt and hard carbon fiber felt |
| CN105479829A (en) * | 2016-01-13 | 2016-04-13 | 青岛高泰新材料有限公司 | Low-density carbon fiber hard insulation quilt and preparation method thereof |
| KR20170040529A (en) * | 2015-10-05 | 2017-04-13 | 오씨아이 주식회사 | Carbon fiber felt and method for preparing thereof |
| CN108410136A (en) * | 2018-05-02 | 2018-08-17 | 北京大学 | Novel high heat conduction graphene or graphite film/carbon fibre composite preparation method |
| CN109291544A (en) * | 2018-10-30 | 2019-02-01 | 中南大学 | A kind of precursor structure and slab preparation method of carbon/carbon compound material slab |
| CN110565266A (en) * | 2019-09-17 | 2019-12-13 | 大同新成新材料股份有限公司 | Preparation method of hard carbon felt |
| CN113046920A (en) * | 2021-05-06 | 2021-06-29 | 因达孚先进材料(苏州)有限公司 | Preparation method of prefabricated body for carbon fiber soft felt |
| CN114457504A (en) * | 2022-03-01 | 2022-05-10 | 甘肃郝氏炭纤维有限公司 | C/C-SiC prefabricated part, C/C-SiC composite material, and preparation method and application thereof |
-
2022
- 2022-12-16 CN CN202211620927.6A patent/CN115852589A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575400A (en) * | 2009-10-06 | 2012-07-11 | 西格里碳素欧洲公司 | Composite material comprising soft carbon fiber felt and hard carbon fiber felt |
| KR20170040529A (en) * | 2015-10-05 | 2017-04-13 | 오씨아이 주식회사 | Carbon fiber felt and method for preparing thereof |
| CN105479829A (en) * | 2016-01-13 | 2016-04-13 | 青岛高泰新材料有限公司 | Low-density carbon fiber hard insulation quilt and preparation method thereof |
| CN108410136A (en) * | 2018-05-02 | 2018-08-17 | 北京大学 | Novel high heat conduction graphene or graphite film/carbon fibre composite preparation method |
| CN109291544A (en) * | 2018-10-30 | 2019-02-01 | 中南大学 | A kind of precursor structure and slab preparation method of carbon/carbon compound material slab |
| CN110565266A (en) * | 2019-09-17 | 2019-12-13 | 大同新成新材料股份有限公司 | Preparation method of hard carbon felt |
| CN113046920A (en) * | 2021-05-06 | 2021-06-29 | 因达孚先进材料(苏州)有限公司 | Preparation method of prefabricated body for carbon fiber soft felt |
| CN114457504A (en) * | 2022-03-01 | 2022-05-10 | 甘肃郝氏炭纤维有限公司 | C/C-SiC prefabricated part, C/C-SiC composite material, and preparation method and application thereof |
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