CN206561655U - A kind of chopped carbon fiber electromagnetic shielding composite material - Google Patents
A kind of chopped carbon fiber electromagnetic shielding composite material Download PDFInfo
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- CN206561655U CN206561655U CN201720046486.1U CN201720046486U CN206561655U CN 206561655 U CN206561655 U CN 206561655U CN 201720046486 U CN201720046486 U CN 201720046486U CN 206561655 U CN206561655 U CN 206561655U
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- carbon fiber
- chopped carbon
- shielding
- electromagnetic shielding
- hot pressing
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Abstract
The utility model discloses a kind of chopped carbon fiber electromagnetic shielding composite material, with three-decker, including two insulating resin layers positioned at outside, the chopped carbon fiber being sandwiched between two insulating resin layers shielding carpet veneer, the material of the insulating resin layer is PE or PC films, described insulating resin layer and chopped carbon fiber shielding carpet veneer are integral by hot pressing, carbon fiber in described chopped carbon fiber shielding carpet veneer overlaps to form three-dimensional conductive network by hot pressing, it is ensured that good electric conductivity and capability of electromagnetic shielding.The utility model have shielding properties it is adjustable, ultra-thin, it is lightweight the features such as, it is with low cost while also excellent anti-oxidant and corrosion resistance, preparation method is simple and easy to do, be widely used, be adapted to produce in enormous quantities.
Description
Technical field
The utility model is related to electronic communication and wearable electromagnetic shielding material field, in particular relates to a kind of be chopped
Carbon fiber electromagnetic shielding composite material and preparation method thereof.
Background technology
With developing rapidly for modern society's electronic information technology, Wireless Communication Equipment increasing number.Electromagenetic wave radiation
Electromagnetic energy increases year by year, electromagnetic radiation pollution can the life of the mankind and healthy, while can also disturb electronic equipment
Normal operation reduce equipment reliability, stability.At present, the electro-magnetic screen layer of use is generally filled out using sheet metal or metal
Expect that composite makes, be covered on the part for needing to protect, play a part of electromagnetic shielding.But density metal is big,
Add the weight of equipment, in addition, also exist expensive, oxidizable, perishable, poor in processability, be difficult to regulation shielding properties,
Absorbing property is poor, in-convenience in use the shortcomings of, in some special occasions, be also easy to cause the inside of precision instrument and equipment short
Road, brings unnecessary loss, seriously limits practical application of the metal in electromagnetic shielding field.Therefore it is badly in need of a kind of quality
Gently, low cost, it is anticorrosive, it is flexible while having the shielding material of excellent absorbing property.
Utility model content
The purpose of this utility model is to overcome conventional metals electromagnetic shielding material weight big, the high shortcoming of cost there is provided
A kind of chopped carbon fiber electromagnetic shielding composite material with low cost, easy to process, excellent performance, solves existing conventional metals
Electromagnetic shielding material is expensive, oxidizable, perishable, difficult processing, and absorbing property is poor, in-convenience in use the shortcomings of.
The utility model is achieved through the following technical solutions：
A kind of chopped carbon fiber electromagnetic shielding composite material, with three-decker, including two insulating resins positioned at outside
Layer, the chopped carbon fiber being sandwiched between two insulating resin layers shielding carpet veneer.
Further, the material of the insulating resin layer is PE or PC films.
Further, described insulating resin layer and chopped carbon fiber shielding carpet veneer are integral by hot pressing, described
Chopped carbon fiber shielding carpet veneer in carbon fiber overlap to form three-dimensional conductive network by hot pressing, it is ensured that good electric conductivity with
And capability of electromagnetic shielding.
Compared with prior art, the utility model has the advantages that：
1）The utility model is manufactured paper with pulp using wet method papermaking technology to chopped carbon fiber and ES fibers, convenient and swift, into
This relatively low suitable production in enormous quantities.
2）Hot pressing is carried out to the preforming shielding felt manufactured paper with pulp by hot-pressing technique so that fiber is laminated, and is formed：ES is fine
Dimension-ES fiber hot pressing nodes and ES fiber and carbon fiber hot pressing nodes, enough intensity and well soft are provided for shielding felt
Property；Mutually overlap joint forms three-dimensional conductive network between carbon fiber, makes it have good electric conductivity and capability of electromagnetic shielding.
3）ES fibers are due to its unique skin-core structure, in the melting of hot pressing mediopellis, and sandwich layer keeps original threadiness,
Hot pressing terminates rear cortex again because surface tension effects are attached to core layer surface again, it is to avoid because resin overflows, hinder electron stream
Logical, so as to reduce material conductivity, due to the presence of ES fibers, pre-prepared shielding felt is combined more preferably with resin film.
4）Material both sides resin film is avoided because of the shortcoming of its insulating properties of material surface electric impact, while resin film is logical
The binding ability of composite can be improved, with shielding with ES fibrocortex melt bindings in intermediate layer shielding felt by crossing hot pressing
Performance is adjustable, ultra-thin, lightweight, also excellent anti-oxidant, corrosion resistance.
5）The utility model technological means is simple and easy to do, with low cost, easy to utilize.
Brief description of the drawings
Fig. 1 is the structural representation of the chopped carbon fiber electromagnetic shielding composite material of the utility model embodiment one.
Fig. 2 is the fibrofelt SEM figures of electromagnetic shielding composite material screen layer prepared by the utility model embodiment two.
The ES fibers of the fibrofelt for the electromagnetic shielding composite material screen layer that Fig. 3 is prepared for the utility model embodiment two-
SEM schemes at ES fiber hot pressing nodes.
The ES fibers of the fibrofelt for the electromagnetic shielding composite material screen layer that Fig. 4 is prepared for the utility model embodiment two-
SEM schemes at carbon fiber hot pressing node.
In figure：1- insulating resin layers；2- chopped carbon fibers shield felt；3- chopped carbon fiber electromagnetic shielding composite materials；4-
Be chopped ES fibers；5- chopped carbon fibers；6- three-dimensional conductive networks；7-ES fiber-ES fiber hot pressing nodes；8-ES fibers-carbon is fine
Tie up hot pressing node.
Embodiment
Embodiment of the present utility model is more specifically described in detail with reference to specific embodiment.
Embodiment one
As shown in Figure 1.A kind of chopped carbon fiber electromagnetic shielding composite material, described chopped carbon fiber electromagnetic shielding is compound
Material 3 has a three-decker, including two insulating resin layers 1 positioned at outside, the chopped carbon that is sandwiched between two insulating resin layers 1 are fine
Dimension shielding carpet veneer 2.
The material of the insulating resin layer 1 is PE or PC films.
Described insulating resin layer 1 and chopped carbon fiber shielding carpet veneer 2 are integral by hot pressing, and described chopped carbon is fine
Carbon fiber in dimension shielding carpet veneer 2 overlaps to form three-dimensional conductive network by hot pressing.
Embodiment two
A kind of preparation method of chopped carbon fiber electromagnetic shielding composite material, including step：
(1) a certain proportion of chopped ES fibers 4 and chopped carbon fiber 5 are successively put into the ethoxy that mass fraction is 1.2%
In cellulose solution disperse, mix, and with mixer speed stir, then stand, the chopped ES fibers 4 be polyethylene/gather
Tacryl, with skin-core structure, cortex is polyethylene, and sandwich layer is polypropylene；The chopped carbon fiber 5 and chopped ES fibers 4
Mass ratio is 2:3, fibre length is 6mm, mixer stir speed (S.S.) 700rpm, mixing time 4min, time of repose 5min.
(2) scattered solution is poured into paper machine of the capacity more than 10L, entered by 80 mesh copper mesh above paper machine
Row is manufactured paper with pulp, and next the chopped carbon fiber manufactured paper with pulp shielding carpet veneer 2 is put into thermostatic drying chamber and dried, the chopped carbon manufactured paper with pulp is fine
Dimension shielding carpet veneer 2 surface density 50g/m2, 80 DEG C of drying box drying temperature, drying time 30min.
(3) chopped carbon fiber dried shielding carpet veneer 2 is sandwiched between two layers of insulating resin layer 1 and is put into compression molding
Hot pressing is carried out in machine, that is, obtains chopped carbon fiber electromagnetic shielding composite material, hot pressing time is 10min, 160 DEG C of hot pressing temperature,
Hot pressing pressure 6MPa；The material of the insulating resin layer 1 is PE or PC films.
As shown in Figures 2 to 4, step（3）In chopped carbon fiber shielding carpet veneer 2 fiber is mutually pressed by hot pressing
Close, form some ES fibers-ES fiber hot pressing nodes 7 and ES fiber and carbon fiber hot pressing node 8；Between carbon fiber and carbon fiber
Form three-dimensional conductive network 6.
In this embodiment, the electrical conductivity and electromagnet shield effect tested chopped carbon fiber electromagnetic shielding composite material
And pliability is assessed, finally show that chopped carbon fiber shields the electrical conductivity of carpet veneer 2σ=13.01 S/cm, in 30-
In 1500 MHz frequency range, its shield effectiveness reaches 30 more than dB, and material can arbitrarily bend curling.Show this kind of method
The chopped carbon fiber shielding material of preparation has excellent capability of electromagnetic shielding and good pliability, is a kind of light weight, makes
Valency is low, anticorrosive, flexible while having the shielding material of excellent absorbing property.
Embodiment three
A kind of preparation method of chopped carbon fiber electromagnetic shielding composite material, including step：
(1) a certain proportion of chopped ES fibers 4 and chopped carbon fiber 5 are successively put into the ethoxy that mass fraction is 1.5%
In cellulose solution disperse, mix, and with mixer speed stir, then stand, the chopped ES fibers 4 be polyethylene/gather
Tacryl, with skin-core structure, cortex is polyethylene, and sandwich layer is polypropylene；The chopped carbon fiber 5 and chopped ES fibers 4
Mass ratio is 3:7, fibre length is 6mm, mixer stir speed (S.S.) 600rpm, mixing time 5min, time of repose 5min.
(2) scattered solution is poured into paper machine of the capacity more than 10L, entered by 80 mesh copper mesh above paper machine
Row is manufactured paper with pulp, and next the chopped carbon fiber manufactured paper with pulp shielding carpet veneer 2 is put into thermostatic drying chamber and dried, the chopped carbon manufactured paper with pulp is fine
Dimension shielding carpet veneer 2 surface density 45g/m2, 70 DEG C of drying box drying temperature, drying time 40min.
(3) chopped carbon fiber dried shielding carpet veneer 2 is sandwiched between two layers of insulating resin layer 1 and is put into compression molding
Hot pressing is carried out in machine, that is, obtains chopped carbon fiber electromagnetic shielding composite material, hot pressing time is 12min, 150 DEG C of hot pressing temperature,
Hot pressing pressure 4MPa；The material of the insulating resin layer 1 is PE or PC films.
Step（3）In chopped carbon fiber shielding carpet veneer 2 fiber is laminated by hot pressing, form some ES fine
Dimension-ES fiber hot pressing node 7 and ES fiber and carbon fiber hot pressing node 8；Three-dimensional conductive network is formed between carbon fiber and carbon fiber
6。
In this embodiment, the electrical conductivity and electromagnet shield effect tested chopped carbon fiber electromagnetic shielding composite material
And pliability is assessed, finally show that chopped carbon fiber shields carpet veneer 2 in 30-1500 MHz frequency range, its
Shield effectiveness reaches 30 more than dB, and material can arbitrarily bend curling.Show chopped carbon fiber shielding material prepared by this kind of method
It is a kind of light weight with excellent capability of electromagnetic shielding and good pliability, low cost is anticorrosive, it is flexible to have simultaneously
There is the shielding material of excellent absorbing property.
Example IV
A kind of preparation method of chopped carbon fiber electromagnetic shielding composite material, including step：
(1) a certain proportion of chopped ES fibers 4 and chopped carbon fiber 5 are successively put into the ethoxy that mass fraction is 0.8%
In cellulose solution disperse, mix, and with mixer speed stir, then stand, the chopped ES fibers 4 be polyethylene/gather
Tacryl, with skin-core structure, cortex is polyethylene, and sandwich layer is polypropylene；The chopped carbon fiber 5 and chopped ES fibers 4
Mass ratio is 1:9, fibre length is 6mm, mixer stir speed (S.S.) 650rpm, mixing time 5min, time of repose 4min.
(2) scattered solution is poured into paper machine of the capacity more than 10L, entered by 80 mesh copper mesh above paper machine
Row is manufactured paper with pulp, and next the chopped carbon fiber manufactured paper with pulp shielding carpet veneer 2 is put into thermostatic drying chamber and dried, the chopped carbon manufactured paper with pulp is fine
Dimension shielding carpet veneer 2 surface density 40g/m2, 60 DEG C of drying box drying temperature, drying time 45min.
(3) chopped carbon fiber dried shielding carpet veneer 2 is sandwiched between two layers of insulating resin layer 1 and is put into compression molding
Hot pressing is carried out in machine, that is, obtains chopped carbon fiber electromagnetic shielding composite material, hot pressing time is 15min, 180 DEG C of hot pressing temperature,
Hot pressing pressure 3MPa；The material of the insulating resin layer 1 is PE or PC films.
Step（3）In chopped carbon fiber shielding carpet veneer 2 fiber is laminated by hot pressing, form some ES fine
Dimension-ES fiber hot pressing node 7 and ES fiber and carbon fiber hot pressing node 8；Three-dimensional conductive network is formed between carbon fiber and carbon fiber
6。
In the above-described embodiments, the electrical conductivity and electromagnetic shielding tested chopped carbon fiber electromagnetic shielding composite material are imitated
And pliability can be assessed, finally show that chopped carbon fiber shields carpet veneer 2 in 30-1500 MHz frequency range,
Its shield effectiveness reaches 30 more than dB, and material can arbitrarily bend curling.Show chopped carbon fiber shielding material prepared by this kind of method
Material have excellent capability of electromagnetic shielding and good pliability, be a kind of light weight, low cost is anticorrosive, it is flexible simultaneously
Shielding material with excellent absorbing property.
The chopped carbon fiber electromagnetic shielding composite material that above-described embodiment is provided can be applied to electronic component, electronic equipment and
Communication apparatus etc. requires that electro-magnetic screen function especially has the field of surface insulation requirement or has the field of ultra-thin requirement；Simultaneously
It can be applied to radiation proof wearable device.
The embodiment is only the utility model preferably embodiment, but embodiment of the present utility model is not by institute
The limitation of embodiment is stated, other are any without departing from the change, modification, generation made under Spirit Essence of the present utility model and principle
Replace, combine, simplifying, should be equivalent substitute mode, be included within protection domain of the present utility model.
Claims (3)
1. a kind of chopped carbon fiber electromagnetic shielding composite material, with three-decker, it is characterised in that：Including positioned at the two of outside
Insulating resin layer (1), the chopped carbon fiber being sandwiched between two insulating resin layers (1) shielding carpet veneer (2).
2. chopped carbon fiber electromagnetic shielding composite material according to claim 1, it is characterised in that：The insulating resin layer
(1) material is PE or PC films.
3. chopped carbon fiber electromagnetic shielding composite material according to claim 1, it is characterised in that：Described insulating resin
Layer (1) and chopped carbon fiber shielding carpet veneer (2) are integral by hot pressing, in described chopped carbon fiber shielding carpet veneer (2)
Carbon fiber overlaps to form three-dimensional conductive network (6) by hot pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720046486.1U CN206561655U (en) | 2017-01-16 | 2017-01-16 | A kind of chopped carbon fiber electromagnetic shielding composite material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720046486.1U CN206561655U (en) | 2017-01-16 | 2017-01-16 | A kind of chopped carbon fiber electromagnetic shielding composite material |
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| CN206561655U true CN206561655U (en) | 2017-10-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106671502A (en) * | 2017-01-16 | 2017-05-17 | 华南理工大学 | Short carbon fiber based electromagnetic shielding composite material and preparation method thereof |
| CN111300914A (en) * | 2019-12-09 | 2020-06-19 | 深圳市欣天科技股份有限公司 | Preparation method of high-strength low-resistivity composite conductive plastic |
-
2017
- 2017-01-16 CN CN201720046486.1U patent/CN206561655U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106671502A (en) * | 2017-01-16 | 2017-05-17 | 华南理工大学 | Short carbon fiber based electromagnetic shielding composite material and preparation method thereof |
| CN111300914A (en) * | 2019-12-09 | 2020-06-19 | 深圳市欣天科技股份有限公司 | Preparation method of high-strength low-resistivity composite conductive plastic |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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