CN108790334A - A kind of suction wave layer and preparation method for intelligent automobile radar - Google Patents

A kind of suction wave layer and preparation method for intelligent automobile radar Download PDF

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Publication number
CN108790334A
CN108790334A CN201810685106.8A CN201810685106A CN108790334A CN 108790334 A CN108790334 A CN 108790334A CN 201810685106 A CN201810685106 A CN 201810685106A CN 108790334 A CN108790334 A CN 108790334A
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keriotheca
layer
intelligent automobile
suction wave
glass fibre
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陈庆
司文彬
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Chengdu New Keli Chemical Science Co Ltd
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Chengdu New Keli Chemical Science Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars

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  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention relates to wave field is inhaled, a kind of suction wave layer and preparation method for intelligent automobile radar is disclosed.Including following preparation process：（1）Polypropylene fibre and glass fibre framework are immersed and inhale wavelength-division dispersion liquid, adsorbs absorbing material, is taken out, it is dry to form the first keriotheca；（2）Polypropylene fibre and glass fibre framework are immersed and inhale wavelength-division dispersion liquid, adsorbs absorbing material, is taken out, it is dry to form the second keriotheca；（3）Polyimides and carbon fiber are uniformly dispersed, rolls, absorbed layer is made；（4）The first keriotheca, absorbed layer, the second keriotheca are spread in a mold successively from top to bottom, composite material is prepared into using hot press method；（5）Conductive silver paste is brushed in the second keriotheca lower surface, the suction wave layer for intelligent automobile radar is made in drying.Composite wave-absorbing layer obtained has honeycomb sandwich construction, and absorption band is wide, absorbent properties are strong, and has preferable strength and stiffness, good absorption effect and performance stabilization.

Description

A kind of suction wave layer and preparation method for intelligent automobile radar
Technical field
The present invention relates to absorbing material fields, disclose a kind of suction wave layer and preparation method for intelligent automobile radar.
Background technology
With the progress of science and technology, the application of electromagnetic technique also brings people into social creativity material progress In one environment full of electromagnetic radiation.The electromagnetic interference that the electromagnetic environment of deterioration generates（EMI）It is not only daily to people logical Letter, computer cause damages with various electronic systems, and can bring threat to people's health.Therefore, to electromagnetic radiation The improvement of pollution is imperative.Currently, preventing both at home and abroad there are mainly two types of the methods of electromagnetic radiation pollution：First, distance protection； Second is that utilizing absorbing material.Presently the most common technical method when wherein using absorbing material.
So-called absorbing material, referring to can absorb or substantially weaken the electromagnetic wave energy for projecting its surface, to reduce electricity A kind of material of the interference of magnetic wave.It is high except requiring absorbing material to have to electromagnetic wave in broad frequency band on engineer application Outside absorptivity, also require it that there are the performances such as light weight, heatproof, moisture-proof, anticorrosive.Absorbing material will consider two in design A problem：When electromagnetic wave meets with absorbing material surface, surface is passed completely through as far as possible, reduces reflection；Suction is entered in electromagnetic wave When inside wave material, the energy of electromagnetic wave to be made to lose as possible.Its application range constantly expands.
Absorbing material application is so that electronic automobile, electric vehicle become more advanced, safer, more meet wanting for environmental protection It asks.With absorbing material make microwave dark room can be widely used in the interference of electronic equipment, radar or communication equipment antenna It leads.At present more mature absorbing material structure include Salisbury screens, Dallenbach screens, Jaumman wave-absorbers, Multi-layer Matched structure etc..Wherein it is narrow to absorb frequency range for Salisbury absorbers；Dallenbach absorbers are by current material electricity The limitation of magnetic parameter frequency dispersion effect, it is difficult to realize that wideband absorbs；The design of Jaumann absorbers is simple, and absorption frequency range is wide, but material Expect thickness it is larger be its major defect；Multi-layer Matched absorbing material absorption frequency range is wide, but design difficulty is big, and with not Material preparation with dielectric properties is more difficult, and Recent study is found, honeycomb absorbing material absorption band is wide, absorbability Energy is strong, density of texture is small, and compound rear with certain strength and stiffness with other materials.
Chinese invention patent application number 201610166422.5 discloses a kind of honeycomb radar absorbing and its system Preparation Method, wherein preparation method include：By honeycomb core be placed in dilution after functionalization graphene slurry in impregnate, then consolidated Change is handled, and obtains first to third suction wave honeycomb；The first suction wave honeycomb, the second suction wave honeycomb and third wave honeycomb is inhaled successively to glue Knot together, obtains honeycomb, then carries out curing process to honeycomb；In the upper and lower surface point of honeycomb Not Fu Gai one layer of PMI skinning layer, then carry out curing process；The lower section binding metal substrate reflection of PMI skinning layer in lower surface Layer, then carries out curing process, obtains honeycomb radar absorbing.The cost of the invention is low, preparation side is simple for process and It is easy to operate, be easily industrialized production, properties of product obtained are reliable, stable quality, can not only make radar-wave absorbing material Material has wideband Stealth Fighter, and can be applied directly to as structural carrier in the weaponry for needing mechanics to carry.
Chinese invention patent application number 201621453503.5 discloses a kind of pyramid honeycomb absorbing material, the suction wave Material includes pyramid and pedestal, and pyramid is inside and outside lamination layer structure, and internal layer is honeycomb substrate layer, and honeycomb substrate layer is in continuous Hexagon is formed cellular, there is fire-retardant absorber layer on honeycomb wall；The outer layer of pyramid is polyester panel layer；Pedestal is by honeycomb The skinning layer of base layer and its appearance is constituted.Specific conical shape mainly is cut into using cladding plate honeycomb absorbing material, often Four with adhesive bonds at positive tetrahedral angle cone structure.Pyramid is pasted onto the suction wave cellular board that surface covers covering by matrix On, honeycomb absorbing material is coated by polyester panel, and not losing powder, scaling-off, environmental protection is easy to clean；Polyester panel is not easy the moisture absorption, and has certain Rigidity and intensity, protection cellular material be unlikely to deform.
According to above-mentioned, it is to add thunder in the composite to prepare more common method for absorbing material in existing scheme Realize that its absorbing property, the addition of absorbent can cause the deterioration of composite materials property and density to increase up to absorbent Equal harmful effects, and the stability of Absorbing Materials is also difficult to ensure, wherein and the present invention proposes a kind of for intelligent vapour The suction wave layer and preparation method of vehicle radar, can effectively solve above-mentioned technical problem.
Invention content
The problem that the wider absorbing material generally existing absorption band of application is narrow at present, absorbent properties are weak, while from stature The strength and stiffness of material are low, cause absorbing property unstable.
To solve the above problems, the present invention uses following technical scheme：
A kind of suction wave layer for intelligent automobile radar, it is characterised in that：The suction wave layer is Multifunctional layered superimposed type structure, according to Secondary includes the first keriotheca, absorbed layer, the second keriotheca and reflecting layer；The framework of first keriotheca by polypropylene fibre and Glass fibre is constituted, and thickness is 50 ~ 100 μm；The absorbed layer is made of fibre reinforced polyimide resin based composites, Thickness is 100 ~ 300 μm；The framework of second keriotheca is made of polypropylene fibre and glass fibre, and thickness is 50 ~ 100 μ m；The reflecting layer is conductive silver coating, and thickness is 20 ~ 100nm.
The preparation method of a kind of suction wave layer for intelligent automobile radar, which is characterized in that include the following steps：
（1）Polypropylene fibre and glass fibre framework are immersed and inhale wavelength-division dispersion liquid, adsorbs absorbing material, is taken out, it is dry to form the One keriotheca；
（2）Polypropylene fibre and glass fibre framework are immersed and inhale wavelength-division dispersion liquid, adsorbs absorbing material, is taken out, it is dry to form the Two keriothecas；
（3）Polyimides and carbon fiber are uniformly dispersed, rolls, absorbed layer is made；
（4）The first keriotheca, absorbed layer, the second keriotheca are spread in a mold, using hot press method system successively from top to bottom For at composite material；
（5）Conductive silver paste is brushed in the second keriotheca lower surface, the suction wave layer for intelligent automobile radar is made in drying.
Step（1）It is described to inhale the dispersion liquid that wavelength-division dispersion liquid is graphene, graphite, carbon black, carbon fiber or carbon nanotube.Quality A concentration of 8%.
Step（3）The temperature of the hot press method is 70 ~ 80 DEG C, pressure 0.08-0.1MPa.
Step（1）, step（2）The polypropylene fibre and glass fibre framework are by polypropylene fibre and glass fibre with matter Measure ratio 1:1 hot pressing that is uniformly dispersed forms.
Step（3）By polyimides and carbon fiber with mass ratio 1:3 are uniformly dispersed, and absorbed layer is made in calendering.
The present invention by absorbing material by being prepared into honeycomb sandwich construction, using honeycomb so that electromagnetic wave is in honeycomb knot It repeatedly reflects, absorb in structure, increase the loss of electromagnetic wave to greatest extent so that the wave-absorbing effect of absorbing material is wider, stronger. The material also has preferable intensity and modulus simultaneously.
The present invention provides a kind of suction wave layers and preparation method for intelligent automobile radar, compared with prior art, Prominent feature and excellent effect are：
1, it proposes and the cellular method for preparing the suction wave layer for intelligent automobile radar is made in absorbing material.
2, by the way that absorbing material is prepared into honeycomb sandwich construction, using honeycomb so that electromagnetic wave is in honeycomb Repeatedly refraction, absorb, increase the loss of electromagnetic wave to greatest extent, the absorption band of obtained absorbing material is wide, absorbent properties By force, assimilation effect is stablized.
3, the present invention has by the composite material for obtaining cellular color absorbing material and other materials by hot moulding Preferable strength and stiffness.
Specific implementation mode
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
The preparation method of a kind of suction wave layer for intelligent automobile radar, which is characterized in that include the following steps：
（1）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 50 μm；
（2）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 100 μm；
（3）By polyimides and carbon fiber with mass ratio 1:3 are uniformly dispersed, and absorbed layer is made in calendering；Thickness is 300 μm.
（4）The first keriotheca, absorbed layer, the second keriotheca are spread in a mold, using hot moulding work successively from top to bottom Skill is prepared into composite material；The temperature of hot press method is 70 ~ 80 DEG C, pressure 0.08MPa.
（5）Conductive silver paste, conductive silver coating are brushed in the second keriotheca lower surface, thickness 20nm is dried, is made and is used for The suction wave layer of intelligent automobile radar.
Embodiment 1 is obtained to inhale wave layer, absorption band wide scope, minimum reflectance, reflectivity range, tensile strength and Notch impact strength is as shown in table 1.
Embodiment 2
The preparation method of a kind of suction wave layer for intelligent automobile radar, which is characterized in that include the following steps：
（1）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 80 μm；
（2）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 100 μm；
（3）By polyimides and carbon fiber with mass ratio 1:3 are uniformly dispersed, and absorbed layer is made in calendering；Thickness is 200 μm.
（4）The first keriotheca, absorbed layer, the second keriotheca are spread in a mold, using hot moulding work successively from top to bottom Skill is prepared into composite material；The temperature of hot press method is 70 ~ 80 DEG C, pressure 0.1MPa.
（5）Conductive silver paste, conductive silver coating are brushed in the second keriotheca lower surface, thickness 50nm is dried, is made and is used for The suction wave layer of intelligent automobile radar.
Embodiment 2 is obtained to inhale wave layer, absorption band wide scope, minimum reflectance, reflectivity range, tensile strength and Notch impact strength is as shown in table 1.
Embodiment 3
The preparation method of a kind of suction wave layer for intelligent automobile radar, which is characterized in that include the following steps：
（1）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 60 μm；
（2）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 80 μm；
（3）By polyimides and carbon fiber with mass ratio 1:3 are uniformly dispersed, and absorbed layer is made in calendering；Thickness is 100 μm.
（4）The first keriotheca, absorbed layer, the second keriotheca are spread in a mold, using hot moulding work successively from top to bottom Skill is prepared into composite material；The temperature of hot press method is 70 ~ 80 DEG C, pressure 0.08MPa.
（5）Conductive silver paste, conductive silver coating are brushed in the second keriotheca lower surface, thickness 50nm is dried, is made and is used for The suction wave layer of intelligent automobile radar.
Embodiment 3 is obtained to inhale wave layer, absorption band wide scope, minimum reflectance, reflectivity range, tensile strength and Notch impact strength is as shown in table 1.
Embodiment 4
The preparation method of a kind of suction wave layer for intelligent automobile radar, which is characterized in that include the following steps：
（1）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 50 μm；
（2）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 50 μm；
（3）By polyimides and carbon fiber with mass ratio 1:3 are uniformly dispersed, and absorbed layer is made in calendering；Thickness is 100 μm.
（4）The first keriotheca, absorbed layer, the second keriotheca are spread in a mold, using hot moulding work successively from top to bottom Skill is prepared into composite material；The temperature of hot press method is 70 ~ 80 DEG C, pressure 0.08MPa.
（5）Conductive silver paste, conductive silver coating are brushed in the second keriotheca lower surface, thickness 80nm is dried, is made and is used for The suction wave layer of intelligent automobile radar.
Embodiment 4 is obtained to inhale wave layer, absorption band wide scope, minimum reflectance, reflectivity range, tensile strength and Notch impact strength is as shown in table 1.
Embodiment 5
The preparation method of a kind of suction wave layer for intelligent automobile radar, which is characterized in that include the following steps：
（1）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 100 μm；
（2）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 50 μm；
（3）By polyimides and carbon fiber with mass ratio 1:3 are uniformly dispersed, and absorbed layer is made in calendering；Thickness is 100 μm.
（4）The first keriotheca, absorbed layer, the second keriotheca are spread in a mold, using hot moulding work successively from top to bottom Skill is prepared into composite material；The temperature of hot press method is 70 ~ 80 DEG C, pressure 0.08MPa.
（5）Conductive silver paste, conductive silver coating, thickness 100nm, drying, obtained use are brushed in the second keriotheca lower surface In the suction wave layer of intelligent automobile radar.
Embodiment 5 is obtained to inhale wave layer, absorption band wide scope, minimum reflectance, reflectivity range, tensile strength and Notch impact strength is as shown in table 1.
Comparative example 1
The preparation method of a kind of suction wave layer for intelligent automobile radar, which is characterized in that include the following steps：
（1）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 50 μm；
（3）By polyimides and carbon fiber with mass ratio 1:3 are uniformly dispersed, and absorbed layer is made in calendering；Thickness is 100 μm.
（4）The first keriotheca, absorbed layer are prepared into composite material using hot press method successively from top to bottom；Hot moulding The temperature of technique is 80 DEG C, pressure 0.08MPa.
（5）Conductive silver paste, conductive silver coating are brushed in absorbed layer lower surface, thickness 100nm is dried, is made for intelligence The suction wave layer of energy car radar.
Comparative example 1 is not provided with the second keriotheca.
Comparative example 1 is obtained to inhale wave layer, absorption band wide scope, minimum reflectance, reflectivity range, tensile strength and Notch impact strength is as shown in table 1.
Comparative example 2
The preparation method of a kind of suction wave layer for intelligent automobile radar, which is characterized in that include the following steps：
（1）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 50 μm；
（2）By polypropylene fibre and glass fibre with mass ratio 1:1 hot pressing that is uniformly dispersed forms polypropylene fibre and glass fibre Framework immerses the graphene dispersing solution that mass concentration is 8%, adsorbs absorbing material, takes out, dry to form the first keriotheca；Thickness It is 100 μm；
（3）By polyimides and carbon fiber with mass ratio 1:3 are uniformly dispersed, and absorbed layer is made in calendering；Thickness is 50 μm.
（4）The first keriotheca, absorbed layer, the second keriotheca are spread in a mold, using hot moulding work successively from top to bottom Skill is prepared into composite material；The temperature of hot press method is 70 ~ 80 DEG C, pressure 0.08MPa.
（5）Conductive silver paste, conductive silver coating are brushed in the second keriotheca lower surface, thickness 20nm is dried, is made and is used for The suction wave layer of intelligent automobile radar.
Absorbed layer is thinned comparative example 2.
Comparative example 2 is obtained to inhale wave layer, absorption band wide scope, minimum reflectance, reflectivity range, tensile strength and Notch impact strength is as shown in table 1.
The test method of above-mentioned performance indicator is：
Absorbing material produced by the present invention is made to the flat samples of 180mm × 180mm, according to the standard of GJB2038A-2011, Using microwave vector network analyzer measure each layer composite material X-band and Ku wave bands complex dielectric permittivity and complex permeability, Selection NRL arch methods progress RAM albedo measurements, measurement frequency ranging from 1 ~ 40GHz, the absorption band for detecting absorbing material are wide Range, minimum reflectance and reflectivity range.
Standard batten is made in absorbing material produced by the present invention, the stretching that batten is measured using universal hydraulic testing machine is strong Degree, test speed 500mm/min are tested 3 times and are acquired average value；Izod notched impact strength experiment, notch A are carried out again Type, pendulum energy storage 2.75J measure the notch impact strength of batten, and test acquires average value 3 times, characterizing its intensity.
Table 1：
Performance indicator Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Comparative example 1 Comparative example 2
Absorption band is wide（GHz） 2~35 2~34 1~35 2~36 2~37 10~22 11~20
Minimum reflectance（dB） -56.5 -57.2 -55.8 -56.8 -57.1 -42.5 -41.4
Reflectivity range（dB） <-10.3 <-10.5 <-11.3 <-10.8 <-10.6 <-5.3 <-4.6
Tensile strength（MPa） 25.5 26.4 25.4 25.7 26.5 18.2 17.9
Notch impact strength（kJ/m2） 19.4 19.2 19.3 19.6 19.5 14.4 14.2

Claims (6)

1. a kind of suction wave layer for intelligent automobile radar, it is characterised in that：The suction wave layer is Multifunctional layered superimposed type structure, Include the first keriotheca, absorbed layer, the second keriotheca and reflecting layer successively；The framework of first keriotheca is by polypropylene fibre It is constituted with glass fibre, thickness is 50 ~ 100 μm；The absorbed layer is by fibre reinforced polyimide resin based composites structure At thickness is 100 ~ 300 μm；The framework of second keriotheca is made of polypropylene fibre and glass fibre, thickness be 50 ~ 100μm；The reflecting layer is conductive silver coating, and thickness is 20 ~ 100nm.
2. a kind of preparation method of suction wave layer for intelligent automobile radar described in claim 1, which is characterized in that including following Step：
（1）Polypropylene fibre and glass fibre framework are immersed and inhale wavelength-division dispersion liquid, adsorbs absorbing material, is taken out, it is dry to form the One keriotheca；
（2）Polypropylene fibre and glass fibre framework are immersed and inhale wavelength-division dispersion liquid, adsorbs absorbing material, is taken out, it is dry to form the Two keriothecas；
（3）Polyimides and carbon fiber are uniformly dispersed, rolls, absorbed layer is made；
（4）The first keriotheca, absorbed layer, the second keriotheca are spread in a mold, using hot press method system successively from top to bottom For at composite material；
（5）Conductive silver paste is brushed in the second keriotheca lower surface, the suction wave layer for intelligent automobile radar is made in drying.
3. the preparation method of a kind of suction wave layer for intelligent automobile radar according to claim 2, it is characterised in that：Step （1）It is described to inhale the dispersion liquid that wavelength-division dispersion liquid is graphene, graphite, carbon black, carbon fiber or carbon nanotube.
4. the preparation method of a kind of suction wave layer for intelligent automobile radar according to claim 2, it is characterised in that：Step （3）The temperature of the hot press method is 70 ~ 80 DEG C, pressure 0.08-0.1MPa.
5. the preparation method of a kind of suction wave layer for intelligent automobile radar according to claim 1, it is characterised in that：Step （1）, step（2）The polypropylene fibre and glass fibre framework are by polypropylene fibre and glass fibre with mass ratio 1:1 dispersion Uniform hot pressing forms.
6. the preparation method of a kind of suction wave layer for intelligent automobile radar according to claim 1, it is characterised in that：Step （3）By polyimides and carbon fiber with mass ratio 1:3 are uniformly dispersed, and absorbed layer is made in calendering.
CN201810685106.8A 2018-06-28 2018-06-28 A kind of suction wave layer and preparation method for intelligent automobile radar Withdrawn CN108790334A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113858663A (en) * 2021-09-24 2021-12-31 成都佳驰电子科技股份有限公司 Method for forming sawtooth-provided L-shaped variable cross-section hollow-structure composite wave-absorbing component

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113858663A (en) * 2021-09-24 2021-12-31 成都佳驰电子科技股份有限公司 Method for forming sawtooth-provided L-shaped variable cross-section hollow-structure composite wave-absorbing component

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Application publication date: 20181113