CN109743873A - A kind of high-performance wave-absorbing packing material and preparation method thereof - Google Patents
A kind of high-performance wave-absorbing packing material and preparation method thereof Download PDFInfo
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- CN109743873A CN109743873A CN201811638873.XA CN201811638873A CN109743873A CN 109743873 A CN109743873 A CN 109743873A CN 201811638873 A CN201811638873 A CN 201811638873A CN 109743873 A CN109743873 A CN 109743873A
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- packing material
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Abstract
A kind of high-performance wave-absorbing packing material, including following components: electromagnetic absorber, active carbon, thermoplastic elastomer (TPE), organic solvent, fire retardant.The present invention proposes a kind of high-performance wave-absorbing packing material, electromagnetic wave absorbent material can be projected onto own face, generate the Polarization Mechanisms such as magnetic hystersis loss, eddy-current loss and residual loss, sponge most of electromagnetic wave, and it is lost by the electric or magnetic of material and dissipates the energy that electromagnetic energy is converted to thermal energy or other forms, and reflected, scatter and transmit all low.In addition, activated carbon adsorption can significantly strengthen its electromagnetic performance on electromagnetic absorber surface.
Description
Technical field
The invention belongs to composite functional material technical field, it is related to a kind of high-performance wave-absorbing packing material and its preparation side
Method.
Background technique
In recent years, more serious with electromagenetic wave radiation problem, electromagnetic pollution is paid attention to extensively by social, traditional electromagnetism
The main application form of wave absorbing material includes the absorbing material of application type and structural type.The absorbing material of both structures can only needle
For specific working environment, such as: mobile terminal and various large scale electronic equipments etc..In traditional field, both forms
There are still significant limitations for structure.
Existing patent CN108081704A provides a kind of preparation method of electromagnetism defect packing material, passes through thermoplasticity
Target product is made in the mixing granulator of elastomer and electromagnetic wave absorbent material, extrusion molding.But electromagnetism defect made from the technique
The accounting of packing material, electromagnetic wave absorbent material is relatively low, less than 50%, cannot play preferable electromagnetic wave absorption performance, simultaneously
The target product cannot have preferable flame retardant property, so the occasion of its application has certain limitation.
Existing patent CN101087513A provides a kind of preparation method of non-continuous conductive medium wave-absorption flat plate, will lead
Electric isolated island is granulated after composite material is made with polymeric matrix, forms conductive isolated island composite particles, coats one layer in its outer surface
Insulation wave transparent adhesive after pour into discontinuous body flat plate composite, outer surface plus cover layer of glass cloth play it is fire-retardant
Effect.But target product made from the technique is plate construction, and in construction, if facing complicated application environment, electromagnetism is lacked
It falls into and is difficult to fill completely.
Summary of the invention
Goal of the invention: for overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of fillings of high-performance wave-absorbing
Material and the method for preparing the high-performance wave-absorbing packing material, it is intended to solve the electro-magnetic wave absorption that prior art patent is faced
The disadvantages of material accounting is low, and electromagnetic wave absorption performance is poor, poor flame retardant properties, limited application field.
Technical solution: the present invention provides a kind of high-performance wave-absorbing packing materials, by weight part, including with the following group
Point: 80-100 parts of electromagnetic absorber, 10-20 parts of active carbon, 5-30 parts of thermoplastic elastomer (TPE), 100-150 parts of organic solvent, resistance
Agent 5-10 parts of combustion.
The present invention proposes that a kind of high-performance wave-absorbing packing material, electromagnetic wave absorbent material can be projected onto own face,
Generate the Polarization Mechanisms such as magnetic hystersis loss, eddy-current loss and residual loss, sponge most of electromagnetic wave, and by the electricity of material or
Electromagnetic energy is converted to the energy of thermal energy or other forms and dissipated by magnetic loss, and is reflected, scatters and transmitted all low.This
Outside, activated carbon adsorption can significantly strengthen its electromagnetic performance on electromagnetic absorber surface.
Further, above-mentioned high-performance wave-absorbing packing material further includes by weight part following components: functional
0.1-5 parts of auxiliary agent.
Further, above-mentioned high-performance wave-absorbing packing material, the electromagnetic wave absorbent material are Fe-Ni alloy/C, Fe-Si
One of alloy, Fe-Co alloy/C, Sendust alloy a variety of are used in mixed way.Electromagnetic wave absorbent material can according to need into
Row selection, belongs to magnetic loss type absorbent, decays by Polarization Mechanisms such as magnetic hystersis loss, eddy-current loss and residual losses and absorbs
The features such as electromagnetic noise has strong absorption, and effect is good, thickness is thin, working band is wide, light-weight, adhesion strength is high.
Further, above-mentioned high-performance wave-absorbing packing material, D50:40-90 μm of the electromagnetic wave absorbent material.
Further, above-mentioned high-performance wave-absorbing packing material, the active carbon are surface through the modified activity of electromagnetism
Carbon dust, granularity are 100-400 mesh.It is optimal to strengthen electromagnetic performance through the modified activated carbon powder of electromagnetism in the preferred surface of active carbon.
Further, above-mentioned high-performance wave-absorbing packing material, the thermoplastic elastomer (TPE) be SBS, SEBS, SIS, TPU,
One of APAO or a variety of is used in mixed way.
Further, above-mentioned high-performance wave-absorbing packing material, the organic solvent are ethyl alcohol, acetone, cyclohexanone, hexamethylene
One of alkane, dimethylbenzene, dimethylformamide, propylene glycol monomethyl ether a variety of are used in mixed way.
Further, above-mentioned high-performance wave-absorbing packing material, the fire retardant are organic nitrogenated flame retardant, including trimerization
Cyanamide, melamine cyanurate and melamine phosphate.Nitrogenated flame retardant is generally White crystal fine powder, and 10 μm of partial size~
50 μm, it is easy dispersion.Density 1.5cm~1.7g/cm.Nitrogenated flame retardant has many good qualities: highly effective flame-retardant；It is halogen-free；Without corruption
Erosion effect, thus reduce machinery and be corroded problem；Ultraviolet resistance shines；Good electrical property, advantage is the most in electronic apparatus product
Obviously；It is colour-fast, no blooming；It is recyclable to recycle.Fire retardant mechanism are as follows: in combustion generate expansion carbon-coating reach it is heat-insulated,
It is oxygen barrier, prevent surface flame from further spreading, reach fire prevention, fire retardation, and low cigarette, it is nontoxic, without molten drop, be it is a kind of efficiently
Environment friendly flame retardant.
Further, above-mentioned high-performance wave-absorbing packing material, the functional aid include antioxidant, defoaming agent, stream
Flat agent, lubricant, thickener, silane coupling agent.
The antioxidant includes zinc dialkyl dithiophosphate, zinc dialkyl dithiocarbamate；N- phenyl-α-naphthylamine
With alkyl phenthazine；Benzotriazole Derivative and mercaptobenzothiazolderivative derivative；The solvent is n-hexane, diglycol monotertiary second
Base ether, 4-methyl-2 pentanone, n-butyl acetate, cellosolvo, butanone, methylisobutylketone, ethyl acetate, butyl acetate,
One or more of dimethylbenzene, butanol, propylene glycol monomethyl ether, dimethylformamide, dimethyl acetamide, halogenated alkane mix
It closes.
The defoaming agent includes silicone emulsion, the fatty acid ester compounded object of higher alcohols, polyoxyethylene polyoxypropylene pentaerythrite
Ether, polyoxyethylene polyoxy propyl alcohol amidogen ether, polypropylene glycerol aether, polyoxyethylene polyoxypropylene glycerin ether, dimethyl silicone polymer.
The levelling agent is silicone oil, dimethyl silicone polymer, polyether polyester azo polyether polyeste, alkyl-modified organosilicon
One or more of mixing of the esters of acrylic acid of oxygen alkane or esters of acrylic acid and fluorine richness.
The lubricant include one of fatty acid acyl amine, oleic-acid, polyesters, synthesizing ester, carboxylic acids or
A variety of mixing.
The thickener includes methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose；
Polyacrylate, the homopolymer or copolymer emulsion of acrylic acid, methacrylic acid；Polyurethanes thickener；Bentonite, concave convex rod
Soil, alumina silicate.
The silane coupling agent includes KH550, KH560, KH570, SI-69, A-172, Z-6020, Z-6173, KBM-
603。
The present invention also provides a kind of preparation methods of high-performance wave-absorbing packing material, comprising the following steps:
Electromagnetic wave absorbent material is mixed with active carbon, is granulated through roll squeezer dry mixed by the first step, powder is neat, uniform
Roll-in fitting, then after grinding mill finally mixes compression, compressed tablets are made；
Thermoplastic elastomer (TPE) and organic solvent, fire retardant and functional aid are mixed evenly second step, and obtained wet process is made
Grain liquid；
Third step uniformly mixes the compressed tablets that the first step obtains with the granulation liquid that second step obtains, wet through screw extruder
Method mixing granulation squeezes out filtration drying to get the high-performance wave-absorbing packing material.
The preparation method of high-performance wave-absorbing packing material of the present invention, method is reasonable, and preparation is convenient, the compressed tablet
Agent is made by electromagnetic wave absorbent material and active carbon through non-slurry pelletizing, and activated carbon adsorption is in electromagnetic absorber surface, Ke Yiqiang
Change its electromagnetic performance.
Further, the preparation method of above-mentioned high-performance wave-absorbing packing material, the prilling temperature are 50-90 DEG C；Institute
Stating drying temperature is 80-120 DEG C.
Above-mentioned technical proposal can be seen that the invention has the following beneficial effects: high-performance wave-absorbings of the present invention to fill out
Material is filled, electromagnetic wave absorption performance is excellent, flame retardant property is good, application field is wide, has great application prospect.
Detailed description of the invention
Fig. 1 is the flow chart of the preparation method of high-performance wave-absorbing packing material of the present invention；
Fig. 2 is the structural schematic diagram of high-performance wave-absorbing packing material of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", " clockwise ", " inverse
The orientation or positional relationship of the instructions such as hour hands " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description originally
Invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific side
Position construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two
It is a or more than two, unless otherwise restricted clearly.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Embodiment 1
A kind of high-performance wave-absorbing packing material, by weight part, including following components: electromagnetic absorber: Fe-Si alloy 80
Part, D50:40 μm；Through 10 parts of the modified activated carbon powder of electromagnetism, granularity is 100 mesh on surface；Thermoplastic elastomer (TPE): 5 parts of SIS,
Organic solvent: 100 parts of hexamethylene, fire retardant: 5 parts of melamine cyanurate, functional aid are by levelling agent: polydimethylsiloxanes
0.04 part of alkane, antioxidant: 0.03 part of 4-methyl-2 pentanone and silane coupling agent: 0.03 part of KH560 composition.
The preparation method of above-mentioned high-performance wave-absorbing packing material, as shown in Figure 1, comprising the following steps:
Electromagnetic wave absorbent material is mixed with active carbon, is granulated through roll squeezer dry mixed by the first step, powder is neat, uniform
Roll-in fitting, then after grinding mill finally mixes compression, compressed tablets are made；
Thermoplastic elastomer (TPE) and organic solvent, fire retardant and functional aid are mixed evenly second step, and obtained wet process is made
Grain liquid；
Third step uniformly mixes the compressed tablets that the first step obtains with the granulation liquid that second step obtains, wet through screw extruder
Method mixing granulation, prilling temperature are 50 DEG C；The particle of extrusion again after 80 DEG C of drying are dry, obtains target production after strainer filtering
Product are a kind of with fire-retardant and excellent electromagnetic wave absorbent properties packing materials.As shown in Fig. 2, packing material is from the inside to the outside, successively
For electromagnetic wave absorbent material, active carbon, thermoplastic elastomer (TPE) glue-line.
Embodiment 2
A kind of high-performance wave-absorbing packing material, by weight part, including following components: electromagnetic absorber: Fe-Ni alloy/C 50
Part and 50 parts of Fe-Co alloy/C, D50:90 μm；Through 20 parts of the modified activated carbon powder of electromagnetism, granularity is 400 mesh on surface；Thermoplasticity
10 parts of elastomer and 20 parts of APAO, organic solvent: 150 parts of dimethylformamide, fire retardant: 10 parts of melamine, function
Property auxiliary agent is by antioxidant: N- phenyl-α-naphthylamine and 1 part of alkyl phenthazine, defoaming agent: 1 part of polypropylene glycerol aether, levelling agent:
1 part of dimethyl silicone polymer, thickener: 1 part of hydroxyethyl cellulose, silane coupling agent include 1 part of KH550 composition.
The preparation method of above-mentioned high-performance wave-absorbing packing material, as shown in Figure 1, comprising the following steps:
Electromagnetic wave absorbent material is mixed with active carbon, is granulated through roll squeezer dry mixed by the first step, powder is neat, uniform
Roll-in fitting, then after grinding mill finally mixes compression, compressed tablets are made；
Thermoplastic elastomer (TPE) and organic solvent, fire retardant and functional aid are mixed evenly second step, and obtained wet process is made
Grain liquid；
Third step uniformly mixes the compressed tablets that the first step obtains with the granulation liquid that second step obtains, wet through screw extruder
Method mixing granulation, prilling temperature are 90 DEG C；The particle of extrusion again after 120 DEG C of drying are dry, obtains target after strainer filtering
Product is a kind of with fire-retardant and excellent electromagnetic wave absorbent properties packing materials.As shown in Fig. 2, packing material is from the inside to the outside, according to
Secondary is electromagnetic wave absorbent material, active carbon, thermoplastic elastomer (TPE) glue-line.
Embodiment 3
A kind of high-performance wave-absorbing packing material, by weight part, including following components: electromagnetic absorber: Sendust alloy
90 parts, D50:60 μm；Through 15 parts of the modified activated carbon powder of electromagnetism, granularity is 200 mesh on surface；Thermoplastic elastomer (TPE): SEBS 20
Part, organic solvent: 120 parts of propylene glycol monomethyl ether, fire retardant: 8 parts of melamine, functional aid are by defoaming agent: polyoxypropylene is sweet
1 part of oily ether, levelling agent: 1 part of dimethyl silicone polymer, thickener: 1 part of methylcellulose composition.
The preparation method of above-mentioned high-performance wave-absorbing packing material, as shown in Figure 1, comprising the following steps:
Electromagnetic wave absorbent material is mixed with active carbon, is granulated through roll squeezer dry mixed by the first step, powder is neat, uniform
Roll-in fitting, then after grinding mill finally mixes compression, compressed tablets are made；
Thermoplastic elastomer (TPE) and organic solvent, fire retardant and functional aid are mixed evenly second step, and obtained wet process is made
Grain liquid；
Third step uniformly mixes the compressed tablets that the first step obtains with the granulation liquid that second step obtains, wet through screw extruder
Method mixing granulation, prilling temperature are 80 DEG C；The particle of extrusion again after 90 DEG C of drying are dry, obtains target production after strainer filtering
Product are a kind of with fire-retardant and excellent electromagnetic wave absorbent properties packing materials.As shown in Fig. 2, packing material is from the inside to the outside, successively
For electromagnetic wave absorbent material, active carbon, thermoplastic elastomer (TPE) glue-line.
Embodiment 4
A kind of high-performance wave-absorbing packing material, by weight part, including following components: electromagnetic absorber: Fe-Co alloy/C is micro-
80 parts of powder, D50:50 μm；Through 10 parts of the modified activated carbon powder of electromagnetism, granularity is 300 mesh on surface；Thermoplastic elastomer (TPE): SBS 5
Part, organic solvent: 150 parts of ethyl alcohol, fire retardant: 6 parts of melamine phosphate, functional aid are by antioxidant: 2- ethyoxyl second
0.5 part of alcohol, levelling agent: 0.5 part of silicone oil, defoaming agent: 2 parts of dimethyl silicone polymer compositions.
The preparation method of above-mentioned high-performance wave-absorbing packing material, as shown in Figure 1, comprising the following steps:
Electromagnetic wave absorbent material is mixed with active carbon, is granulated through roll squeezer dry mixed by the first step, powder is neat, uniform
Roll-in fitting, then after grinding mill finally mixes compression, compressed tablets are made；
Thermoplastic elastomer (TPE) and organic solvent, fire retardant and functional aid are mixed evenly second step, and obtained wet process is made
Grain liquid；
Third step uniformly mixes the compressed tablets that the first step obtains with the granulation liquid that second step obtains, wet through screw extruder
Method mixing granulation, prilling temperature are 80 DEG C；The particle of extrusion again after 100 DEG C of drying are dry, obtains target after strainer filtering
Product is a kind of with fire-retardant and excellent electromagnetic wave absorbent properties packing materials.As shown in Fig. 2, packing material is from the inside to the outside, according to
Secondary is electromagnetic wave absorbent material, active carbon, thermoplastic elastomer (TPE) glue-line.
Embodiment 5
Target product is made according to processing step in embodiment 4, tests the reflection of electromagnetic wave rate in its different frequency range, reference standard
GJB2038A-2011.Test result is as follows shown in table:
| Test frequency range | 6GHz | 10GHz | 14GHz | 18GHz | 20GHz |
| Reflectivity | -3.196dB | -3.891dB | -4.074dB | -5.208dB | -5.972dB |
By upper table, the result shows that, in higher frequency band, which still has excellent electromagnetic wave absorption performance, reflection of electromagnetic wave rate
≤-6dB。
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement can also be made, these improvement also should be regarded as of the invention
Protection scope.
Claims (10)
1. a kind of high-performance wave-absorbing packing material, it is characterised in that: by weight part, including following components: electromagnetic absorption material
Expect 80-100 parts, 10-20 parts of active carbon, 5-30 parts of thermoplastic elastomer (TPE), 100-150 parts of organic solvent, 5-10 parts of fire retardant.
2. high-performance wave-absorbing packing material according to claim 1, it is characterised in that: by weight part, further include with
Lower component: 0.1-5 parts of functional aid, the functional aid includes antioxidant, defoaming agent, levelling agent, lubricant, thickening
Agent, silane coupling agent.
3. high-performance wave-absorbing packing material according to claim 1, it is characterised in that: the electromagnetic wave absorbent material is
One of Fe-Ni alloy/C, Fe-Si alloy, Fe-Co alloy/C, Sendust alloy a variety of are used in mixed way.
4. high-performance wave-absorbing packing material according to claim 3, it is characterised in that: the electromagnetic wave absorbent material
D50:40-90 μm.
5. high-performance wave-absorbing packing material according to claim 1, it is characterised in that: the active carbon is surface through electromagnetism
Modified activated carbon powder, granularity are 100-400 mesh.
6. high-performance wave-absorbing packing material according to claim 1, it is characterised in that: the thermoplastic elastomer (TPE) be SBS,
One of SEBS, SIS, TPU, APAO or a variety of are used in mixed way.
7. high-performance wave-absorbing packing material according to claim 1, it is characterised in that: the organic solvent is ethyl alcohol, third
One of ketone, cyclohexanone, hexamethylene, dimethylbenzene, dimethylformamide, propylene glycol monomethyl ether a variety of are used in mixed way.
8. high-performance wave-absorbing packing material according to claim 1, it is characterised in that: the fire retardant is the resistance of organic nitrogen system
Fire agent, including melamine, melamine cyanurate and melamine phosphate.
9. a kind of preparation method of high-performance wave-absorbing packing material, it is characterised in that: the following steps are included:
Electromagnetic wave absorbent material is mixed with active carbon, is granulated through roll squeezer dry mixed by the first step, powder is neat, uniform
Roll-in fitting, then after grinding mill finally mixes compression, compressed tablets are made；
Thermoplastic elastomer (TPE) and organic solvent, fire retardant and functional aid are mixed evenly second step, and obtained wet process is made
Grain liquid；
Third step uniformly mixes the compressed tablets that the first step obtains with the granulation liquid that second step obtains, wet through screw extruder
Method mixing granulation squeezes out filtration drying to get the high-performance wave-absorbing packing material.
10. the preparation method of high-performance wave-absorbing packing material according to claim 9, it is characterised in that: the granulation temperature
Degree is 50-90 DEG C；The drying temperature is 80-120 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205096A (en) * | 2019-06-13 | 2019-09-06 | 青岛科凯达橡塑有限公司 | A kind of controllable micropore absorbing meta-material and its preparation method and application |
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| CN105331264A (en) * | 2014-08-15 | 2016-02-17 | 中国科学院城市环境研究所 | Composite electromagnetic shielding paint based on nano carbon material |
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| CN102215706A (en) * | 2008-11-20 | 2011-10-12 | R.J.雷诺兹烟草公司 | Adsorbent material impregnated with metal oxide component |
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Application publication date: 20190510 |