CN1255600C - Non-woven needle-punched fabric and quasi three-dimensional prefab - Google Patents
Non-woven needle-punched fabric and quasi three-dimensional prefab Download PDFInfo
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- CN1255600C CN1255600C CN02138191.7A CN02138191A CN1255600C CN 1255600 C CN1255600 C CN 1255600C CN 02138191 A CN02138191 A CN 02138191A CN 1255600 C CN1255600 C CN 1255600C
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- 239000004744 fabric Substances 0.000 title claims description 97
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 42
- 229920002239 polyacrylonitrile Polymers 0.000 claims abstract description 12
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 10
- 239000004917 carbon fiber Substances 0.000 claims abstract description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000003475 lamination Methods 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims description 101
- 238000001467 acupuncture Methods 0.000 claims description 51
- 239000010410 layer Substances 0.000 claims description 31
- 238000009940 knitting Methods 0.000 claims description 17
- 241000209094 Oryza Species 0.000 claims description 16
- 235000007164 Oryza sativa Nutrition 0.000 claims description 16
- 235000009566 rice Nutrition 0.000 claims description 16
- 239000011229 interlayer Substances 0.000 claims description 9
- 239000002344 surface layer Substances 0.000 claims description 8
- 238000007385 chemical modification Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims 1
- -1 polypropylene Polymers 0.000 claims 1
- 229920001155 polypropylene Polymers 0.000 claims 1
- 239000002356 single layer Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 14
- 239000002131 composite material Substances 0.000 abstract description 10
- 238000002679 ablation Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 abstract description 2
- 239000004745 nonwoven fabric Substances 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 239000002759 woven fabric Substances 0.000 abstract 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 230000032798 delamination Effects 0.000 abstract 1
- 239000002657 fibrous material Substances 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 150000001722 carbon compounds Chemical class 0.000 description 8
- 239000002783 friction material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000009941 weaving Methods 0.000 description 4
- 238000009954 braiding Methods 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 3
- 238000005255 carburizing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000015895 biscuits Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 230000001394 metastastic effect Effects 0.000 description 1
- 206010061289 metastatic neoplasm Diseases 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention relates to polyacrylonitrile carbon fiber prefabricating thin layer nonwoven fabrics, woven fabrics and a quasi three-dimensional prefabricated part formed by multiple and alternate lamination and needle stab. The present invention overcomes the defect that the existing lamination needle stab prefabricated part which uses OPF woven fabrics in the shapes of long bars as main materials. The present invention has the advantages of strong binding force among prefabricated parts, uniform volume and density, integral stability, no deformation and no delamination, can directly adopt the CVD technology, greatly shortens the production construction period of carbon/carbon composite materials, less constringency, high permeability, and has a great amount of deposited carbon. Manufactured carbon/carbon composite materials have the advantages of friction resistance, less abrasion, high thermal conductivity, high thermal shock resistance, high shear strength and low dispersion coefficient, and is especially suitable for fiber materials, such as the brake disc of an airplane or ablation resistant carbon/carbon composite materials, etc.
Description
Technical field
The present invention relates to a kind of by functional fibre lamination acupuncture prefabricated component, especially non-woven needle-punched fabric and the quasi three-dimensional prefab of making by polyacrylonitrile-based carbon fibre.Be specially adapted to direct subsequently deposit carbon and be processed to carbon/carbon structure material, for example fiber-based materials such as aeroplane brake discs or the carbon/carbon compound material of anti-the ablation.
Background technology
The prefabricated component that the functional fibre lamination forms through acupuncture, because its special high-temperature mechanics and thermal property, high elevated temperature strength, wear-resistant and high temperature resistant ablation characteristics are generally acknowledged good airborne vehicle brake disc, rocket tube larynx lining structural material.
Chinese patent 96121709 discloses a kind of by the pre-oxygen fiber of carbon fiber precursor polyacrylonitrile-radical (OPF), the quasi three-dimensional prefab that multiple lamination acupuncture forms, surface layer adopts bed thickness 8-13mm, obtains surface density by 25mm or following staple fibre through air lay is 800g/m
2Fiber web, the intermediate layer is bed thickness 3mm, hands over the long fiber layer that becomes to the slight acupuncture of overlap joint by three layers of OPF fiber, neighbouring layer rotation 60 degree stack, and form through acupuncture successively.Yet by the prefabricated component that the acupuncture of OPF superimposed fiber obtains, at first necessary carbonization makes fiber become carbon fiber (CF), yet integral prefabricated carbonization poor controllability, difficulty are big, the fiber wriggling not only takes place easily produce STRESS VARIATION, cause the prefabricated component stratified deformation, overall shrinkage is big; And the internal fiber carbonization is evenly difficult, the global density lack of homogeneity, and intensity is low, and CVD deposition difficulty is big, influences the subsequent product quality.And the intermediate layer is the long fiber structure, and its Z that connects each layer then produces in the long fiber layer by acupuncture to fiber, cause the long fiber damage, and the long fiber damage will influence the tensile strength of prefabricated component bedding angle.
Chinese patent 95191073 disclosed another kind of prefabricated components adopt the substantially invariable fibrage of stack thickness, to obtain the homogeneous texture that the volume fabric integer is constant, Z is constant to volume fiber rate and bed thickness is constant.But do not indicate each layer fibre structure, and be yet by the pre-oxygen fiber production of carbon fiber precursor polyacrylonitrile-radical.
Yet there are some researches show, when fibrage is when being made by long or continuous monofilament, the Z that connects each layer to fiber difficulty reach permanent transfer, and fibre length, fiber crimp, fiber surface fineness etc. also can influence the permanent transfer of fiber.The fiber and the laminated construction difference of obvious lamination, the formed prefabricated component performance of acupuncture has than big-difference.
U.S. Pat 5869411 disclosed oxidation polyacrylonitrile fiber acupuncture precast bodies, its prefabricated blank core adopts the clout of cutting of this fibre preforms base substrate, obtaining fibre length through mechanical crushing/shredding separation is the 10-25mm regenerated fiber, obtain thickness by air lay and pre-needling then and be about 5-11mm, density is about 0.1-0.2g/cm3 pre-needling fiber web, again that this multilayer pre-needling air fibres net is superimposed, or with the multi-layer fiber bundle, weaving, braiding or knitted fabric, obtaining having density by acupuncture is 0.4-0.8g/cm3 overall structure preform blank, base substrate two surface layers adopt density low slightly comprise the sacrifice layer that this aerodynamic-laid web is formed, thereby reach " fully utilize and repeatedly the reuse precast body cut cofibre ".Yet the method and incompatibility industrial mass manufacture are relatively always fewer because it cuts clout, and commercial fibre can not directly add again because self superficiality and coherent are poor.Therefore in addition, fiber physical property and mechanical property after acupuncture always are affected, and constantly will be subjected to very big infringement by the physical property and the mechanical property of resulting pre-needling fiber web of acupuncture and precast body more repeatedly, and this is that people are undesirable.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, provide a kind of and directly made by polyacrylonitrile-based carbon fibre, and the Z that favourable acupuncture forms permanent transfer is easy to the non-woven needle-punched fabric of follow-up CVD deposition to fiber.
Another object of the present invention is to provide a kind of above-mentioned bondedfibre fabric that contains, help obtaining the interlaminar shear strength height, anti-delamination is good, can directly enter CVD, and monolithic stability is indeformable in the CVD process, easily carburizing easily deposits, can obtain high-compactness, the overall uniform quasi three-dimensional prefab.
The present invention's first purpose realizes, comprises by staple fibre superimposed and acupuncture at random making, and it is characterized in that by the short polyacrylonitrile-based carbon fibre (PANCF) of cutting, loose through steam or chemical handling flexibly, machinery, unclog and readjust, to become surface density be 40-120 gram/rice in acupuncture
2The thin layer bondedfibre fabric.Bondedfibre fabric of the present invention, after steam or chemical modification are handled (as handling with antistatic finishing agent and softener), make carbon fiber become soft, remove static, the crude degree in surface obviously improves, and helps that fortifying fibre is embraced and power, makes it to be suitable for into net, and but punctural is good, is easy to Z that follow-up acupuncture forever shifted to fiber.Loose and unclog and readjust into net for favourable machinery, CF fibre length of the present invention better is cut into 50-100mm.Obtain better interlayer density for helping and composite subsequently long fiber layer structure proportioning, reaching, bondedfibre fabric surface density of the present invention is preferably 80-120 gram/rice
2
The present invention's second purpose realizes that main the improvement adopts above-mentioned bondedfibre fabric and PANCF fiber individual layer woven cloth to be superimposed, and obtains having the prefabricated component of accurate three-dimensional structure through acupuncture successively.
The present invention Z that more interlayer connects for favourable acupuncture forms is to fiber, strengthen prefabricated component interlayer engaging force, said lamination preferably adopts bondedfibre fabric and fibre knitting cloth successively to replace, alternative stacked again with uniform thickness not for well, be excellent greater than the bondedfibre fabric bed thickness wherein with the fibre knitting cloth bed thickness, help obtaining higher woven cloth weight ratio, the bondedfibre fabric bed thickness is (bed thickness after the acupuncture) well with 0.1-0.4mm, and the fibre knitting cloth bed thickness is (bed thickness after the acupuncture) well with 0.3-0.8mm.
Prefabricated component of the present invention is loose to both sides for effectively preventing prefabricated component surface layer fiber, and outermost two surface layers preferably adopt the bondedfibre fabric front cover.
Prefabricated component fibre knitting cloth lamination of the present invention adds better employing and rotates staggered the laying, helps balanced prefabricated component in-plane intensity.
Prefabricated component fibre knitting cloth of the present invention to adopt no latitude cloth, helps Z to fibre migration especially, improves the prefabricated component Z direction strength.
Prefabricated component of the present invention is favourable enhancing prefabricated component bulk strength, preferably make the fibre knitting cloth volume weight greater than bondedfibre fabric in the prefabricated component, be excellent with fibre knitting cloth volume weight percentage 65-90% especially wherein, decide on product requirement, as be used for ablating and use carbon/carbon compound material, the fibre knitting cloth envelope-bulk to weight ratio can suitably hang down; Be used for carbon/carbon composite friction material, the fibre knitting cloth volume weight should be higher.
Prefabricated component bondedfibre fabric surface density of the present invention is preferably 40-120 gram/cm
2, being used for ablating and using carbon/carbon compound material, surface density is suitable higher; Be used for carbon/carbon composite friction material, surface density should be hanged down;
Prefabricated component fibre knitting cloth surface density of the present invention is preferably 70-360 gram/cm
2, being used for ablating and using carbon/carbon compound material, surface density should be hanged down; Be used for carbon/carbon composite friction material, surface density is suitable higher;
Prefabricated component interlayer density of the present invention is preferably 12-20 layer/cm, is used for ablating using carbon/carbon compound material, and interlayer density can be hanged down; Be used for carbon/carbon composite friction material, interlayer density should be higher;
Prefabricated component bulk density of the present invention is preferably 0.4-0.8 gram/cm
3, being used for ablating and using carbon/carbon compound material, bulk density can be hanged down; Be used for carbon/carbon composite friction material, bulk density should be higher.
The present invention is needle-punching method successively, can be by common acupuncture mode, as with the acupuncture successively of identical acupuncture step-length to desired thickness, have no special requirements.
The present invention is owing to directly adopt polyacrylonitrile-based carbon fibre (PANCF), and make bondedfibre fabric and woven cloth respectively, the prefabricated component that the acupuncture that successively is superimposed obtains, not only make prefabricated component can directly enter CVD technology, shorten carbon/carbon compound material greatly and made the duration, and numerous nonwoven fabric layers more can deposit more carbon in the CVD process, and porous is to each aspect.Alternate laying bondedfibre fabric more helps the Z of acupuncture formation interlayer connection to fibre bundle, and permanent metastatic is good, and prefabricated component interlayer adhesion is strong, is difficult for layering.Weave no latitude cloth, more help Z, improve the prefabricated component Z direction strength, prevent that effectively STRESS VARIATION causes the fibrage layering in the high-temperature carburizing process to fibre migration, the prefabricated component monolithic stability, not yielding.The quasi three-dimensional prefab that the present invention makes, it is even to have bulk density, stable performance, overall shrinkage trifle material saving reduces cost, easily carburizing easily deposits, the carbon/carbon compound material that makes has rub resistance, wearing and tearing are little, thermal conductivity and good thermal shock, shear strength height, coefficient of dispersion is low, is specially adapted to make high performance aeroplane brake discs and the high temperature resistant part of anti-the ablation.Carbon fiber bondedfibre fabric of the present invention, overcome the difficult technical barrier that adopts carbon fiber directly to make bondedfibre fabric of people for a long time, but punctural is good, helps acupuncture and forms the Z of permanent transfer to fiber, be specially adapted to the manufacturing of acupuncture prefabricated component, can improve the prefabricated component performance greatly.
Below in conjunction with several specific embodiments, further specify the present invention, but embodiment should not be construed as to concrete qualification of the present invention.
The specific embodiment
Embodiment 1: it is the 60mm staple fibre that polyacrylonitrile-based carbon fibre is cut into length, squirt the surface with weaving antistatic additive octadecyl dimethyl ethoxy quaternary ammonium nitrate (SN), putting into the closed container sealing deposited about 22 hours, make its softening modification, taking-up is the wadding fibrous suede of 90% shatter value through the shredding of weaving opener, unclog and readjust into ultra-thin net by the machine of unclogging and readjusting then, back and forth lay by control mechanical trip and frequency, making surface density through the acupuncture typing is 50 gram/rice
2The thin layer bondedfibre fabric standby.It is 200 gram/rice that polyacrylonitrile-based carbon fibre is weaved into surface density by braiding machine
2Latitude cloth is arranged.Bondedfibre fabric with being arranged, latitude cloth is successively replaced rotary laying, and to make outermost two surface layers be bondedfibre fabric, press needling density 25 pins/cm2, depth of needling is 14mm acupuncture successively, 18 layers/cm of density between key-course, bondedfibre fabric and have latitude cloth bed thickness to be respectively 0.17mm, 0.39mm, bulk density be 0.45 gram/cm3, long fiber content is 79% quasi three-dimensional prefab.This prefabricated component is applicable to carbon/carbon composite friction material.
Embodiment 2: it is the 75mm staple fibre that polyacrylonitrile-based carbon fibre is cut into length, it is in 80 ℃ of vaporiums that staple fibre is inserted room temperature, squirt with water vapour, be incubated airtight about 5 hours, make its softening modification, taking-up is the wadding fibrous suede of 90% shatter value through the shredding of weaving opener, unclogs and readjusts into ultra-thin net by the machine of unclogging and readjusting then, back and forth lay by control mechanical trip and frequency, making surface density through the acupuncture typing is 80 gram/rice
2The thin layer bondedfibre fabric standby.It is 240 gram/rice that polyacrylonitrile-based carbon fibre is weaved into surface density by braiding machine
2No latitude cloth.Bondedfibre fabric and no latitude cloth are successively alternately laid, and surface layer is a bondedfibre fabric about making, and presses needling density 30 pins/cm
2, depth of needling is 18mm acupuncture successively, 16 layers/cm of density between key-course, bondedfibre fabric and do not have latitude cloth bed thickness and be respectively 0.19mm, 0.44mm, bulk density be 0.52 gram/cm
3, long fiber content is 73% quasi three-dimensional prefab.This prefabricated component is used for the aircraft carbon brake biscuit.
Embodiment 3: making surface density as stated above respectively is 100 gram/rice
2The thin layer bondedfibre fabric, and surface density is 360 gram/rice
2No latitude cloth.Bondedfibre fabric and no latitude cloth are successively alternately laid, and surface layer is a bondedfibre fabric about making, and presses needling density 20 pins/cm
2, depth of needling is 14mm acupuncture successively, 17 layers/cm of density between key-course, bondedfibre fabric and have latitude cloth bed thickness to be respectively 0.18mm, 0.41mm, bulk density be 0.77 gram/cm
3, long fiber content is 84% quasi three-dimensional prefab.This prefabricated high temperature furnace inner plating that can be used for.
Embodiment 4: making surface density as stated above respectively is 120 gram/rice
2The thin layer bondedfibre fabric, and surface density is 240 gram/rice
2No latitude cloth.Bondedfibre fabric and no latitude cloth are successively alternately laid, 17 layers/cm of density between key-course, bondedfibre fabric and have latitude cloth bed thickness to be respectively 0.18mm, 0.41mm must bulk density be 0.62 gram/cm
3, long fiber content is 65% quasi three-dimensional prefab.This prefabricated high temperature generating component that can be used for.
Embodiment 5: making surface density as stated above respectively is 40 gram/rice
2The thin layer bondedfibre fabric, and surface density is 180 gram/rice
2No latitude cloth.Bondedfibre fabric and no latitude cloth are successively alternately laid, 20 layers/cm of density between key-course, bondedfibre fabric and have latitude cloth bed thickness to be respectively 0.15mm, 0.35mm must bulk density be 0.44 gram/cm
3, long fiber content is 81% quasi three-dimensional prefab.This prefabricated human-body biological framework material that can be used for.
Embodiment 6: making surface density as stated above respectively is 120 gram/rice
2The thin layer bondedfibre fabric, and surface density is 240 gram/rice
2No latitude cloth.Bondedfibre fabric and no latitude cloth are successively alternately laid, 13 layers/cm of density between key-course, bondedfibre fabric and have latitude cloth bed thickness to be respectively 0.18mm, 0.54mm must bulk density be 0.48 gram/cm
3, long fiber content is 65% quasi three-dimensional prefab.Be used for the compound ablator of carbon/carbon.
Easy for describing, the present invention's said " prefabricated component " is the abbreviation of " preform blank ".
Claims (18)
1, a kind of non-woven needle-punched fabric is made by staple fibre superimposed and acupuncture at random, it is characterized in that said staple fibre is the polyacrylonitrile-based carbon fibre substance, through steam or chemical modification handle, machinery is loose, unclog and readjust, to become surface density be 40-120 gram/rice in acupuncture
2The thin layer bondedfibre fabric.
2,, it is characterized in that said polyacrylonitrile-based carbon fibre length is 50-100mm according to the described non-woven needle-punched fabric of claim 1.
3,, it is characterized in that said bondedfibre fabric surface density is a 80-120 gram/rice according to the described non-woven needle-punched fabric of claim 1
2
4, a kind of superimposed fiber acupuncture quasi three-dimensional prefab, comprise that the acupuncture of multilayer pre-needling bondedfibre fabric makes, it is characterized in that said prefabricated component makes for the acupuncture successively that is superimposed by described thin layer bondedfibre fabric of one of claim 1-3 and single-layer polypropylene itrile group carbon fiber woven cloth.
5,, it is characterized in that said lamination is that bondedfibre fabric and fibre knitting cloth successively replace according to the described superimposed fiber acupuncture of claim 4 quasi three-dimensional prefab.
6,, it is characterized in that staggered laying of said stratified fiber woven cloth rotation according to the described superimposed fiber acupuncture of claim 4 quasi three-dimensional prefab.
7,, it is characterized in that said fibre knitting cloth is no latitude cloth according to the described superimposed fiber acupuncture of claim 4 quasi three-dimensional prefab.
8, according to claim 4,5,6 or 7 described superimposed fiber acupuncture quasi three-dimensional prefabs, it is characterized in that said prefabricated component outermost two surface layers are bondedfibre fabric.
9, described according to Claim 8 superimposed fiber acupuncture quasi three-dimensional prefab is characterized in that said alternative stacked fibre knitting cloth bed thickness is greater than bondedfibre fabric.
10,, it is characterized in that said bondedfibre fabric bed thickness is 0.1-0.4mm according to the described superimposed fiber acupuncture of claim 9 quasi three-dimensional prefab.
11,, it is characterized in that said fibre knitting cloth bed thickness is 0.3-0.8mm according to the described superimposed fiber acupuncture of claim 9 quasi three-dimensional prefab.
12, described according to Claim 8 superimposed fiber acupuncture quasi three-dimensional prefab is characterized in that the fibre knitting cloth volume weight is greater than bondedfibre fabric in the prefabricated component.
13,, it is characterized in that said fibre knitting cloth volume weight percentage is 65-90% according to the described superimposed fiber acupuncture of claim 12 quasi three-dimensional prefab.
14, described according to Claim 8 superimposed fiber acupuncture quasi three-dimensional prefab is characterized in that said fibre knitting cloth surface density is 70-360 gram/cm
2
15, described according to Claim 8 superimposed fiber acupuncture quasi three-dimensional prefab is characterized in that interlayer density is 12-20 layer/cm.
16, described according to Claim 8 superimposed fiber acupuncture quasi three-dimensional prefab is characterized in that needling density 20-35 pin/cm
2
17, described according to Claim 8 superimposed fiber acupuncture quasi three-dimensional prefab is characterized in that the prefabricated component bulk density is 0.4-0.8 gram/cm
3
18, according to claim 9,10,11,12,13,14,15 or 16 described superimposed fiber acupuncture quasi three-dimensional prefabs, it is characterized in that the prefabricated component bulk density is 0.4-0.8 gram/cm
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02138191.7A CN1255600C (en) | 2002-08-27 | 2002-08-27 | Non-woven needle-punched fabric and quasi three-dimensional prefab |
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| CN02138191.7A CN1255600C (en) | 2002-08-27 | 2002-08-27 | Non-woven needle-punched fabric and quasi three-dimensional prefab |
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| CN1255600C true CN1255600C (en) | 2006-05-10 |
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| CN101899748B (en) * | 2010-05-28 | 2012-02-08 | 上海鼎炘实业有限公司 | High-temperature resistant carbon fiber heat insulation felt |
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| IT201800003741A1 (en) * | 2018-03-19 | 2019-09-19 | Freni Brembo Spa | METHOD FOR MAKING A FIBROUS PREFORM AND A FIBROUS PREFORM SO OBTAINED |
| CN110485047B (en) * | 2019-09-18 | 2024-04-05 | 江苏恒神股份有限公司 | Quasi-three-dimensional preform for aircraft brake disc and preparation method thereof |
| CN110747578B (en) * | 2019-10-25 | 2021-01-29 | 江苏天鸟高新技术股份有限公司 | High-density carbon fiber needled felt and preparation method thereof |
| CN112936657B (en) * | 2021-01-29 | 2023-01-31 | 哈尔滨工业大学 | Method for reinforcing phenolic resin composite material by using fiber braid with anti-oxidation laminated structure |
| CN113502606A (en) * | 2021-06-30 | 2021-10-15 | 浙江星辉新材料科技有限公司 | Carbon brake disc preform and preparation method thereof |
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2002
- 2002-08-27 CN CN02138191.7A patent/CN1255600C/en not_active Expired - Lifetime
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| CN1408920A (en) | 2003-04-09 |
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