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CN105563971A - Composite sandwich structural body as well as preparation method and application thereof - Google Patents

Composite sandwich structural body as well as preparation method and application thereof Download PDF

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Publication number
CN105563971A
CN105563971A CN201510187342.3A CN201510187342A CN105563971A CN 105563971 A CN105563971 A CN 105563971A CN 201510187342 A CN201510187342 A CN 201510187342A CN 105563971 A CN105563971 A CN 105563971A
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CN
China
Prior art keywords
resin
core
composite material
sandwich structure
fibre
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Granted
Application number
CN201510187342.3A
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Chinese (zh)
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CN105563971B (en
Inventor
黄险波
陈大华
蒋新
范欣愉
卢勇
高雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Jinfa Composite Materials Co ltd
Guangzhou Kingfa Carbon Fiber New Material Development Co ltd
Original Assignee
GUANGZHOU KINGFA CARBON FIBER NEW MATERIAL DEVELOPMENT Co Ltd
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Priority to CN201510187342.3A priority Critical patent/CN105563971B/en
Priority claimed from CN201510187342.3A external-priority patent/CN105563971B/en
Publication of CN105563971A publication Critical patent/CN105563971A/en
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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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/42—Layered products comprising a layer of synthetic resin comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
    • 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
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1207—Heat-activated adhesive
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
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    • B32B2262/06—Vegetal fibres
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2262/10—Inorganic fibres
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
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    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/101—Glass
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/105—Metal
    • 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
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • 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
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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
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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
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • 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
    • B32B2375/00—Polyureas; Polyurethanes
    • 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
    • B32B2509/00—Household appliances
    • 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
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    • B32B2605/08—Cars
    • 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
    • B32B2605/10—Trains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B2605/00—Vehicles
    • B32B2605/18—Aircraft

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a composite sandwich structural body as well as a preparation method and application thereof. The composite sandwich structural body comprises a core material (I), resin-based fiber-reinforced bodies (II) arranged on and under the core material (I), and transitional adhesive film bonding layers (III) between the core material (I) and the resin-based fiber-reinforced bodies (II), wherein the resin-based fiber-reinforced bodies (II) comprise resin-based bodies and fiber-reinforced bodies; the core material (I) is made of epoxy resin, light packing and fibers; the specific gravity of the core material (I) is 0.3-1.2 g/cm<3>; the core material (I) is 0.1-5.0 mm in thickness. The composite sandwich structural body prepared according to the preparation method not only is light in weight, high in strength, rigidity and the like, but also can reduce the cost of a product obviously to improve market competitiveness; the preparation process is simple; the composite sandwich structural body can be applied to surface structural panels in the industries of 3C consumer electronic products, household appliances, automobiles, aviation and rail transit, surface structural panels of cases related to the industries, and the like.

Description

A kind of composite material sandwich structure body and its preparation method and application
Technical field
The present invention relates to field of compound material, be specifically related to a kind of composite material sandwich structure body and its preparation method and application.
Background technology
In recent years, lightweight, wall is thin and the component that rigidity is high is widely used in computer, communications industry, household electric appliances and automobile component, building components and panel component.As can guaranteeing mechanical characteristic and improving Lightness component, there will be a known the sandwich structural body configuring on the epidermis of the core of lightweight and formed by the fiber-reinforced resin (FRP) of continuous print reinforcing fiber group strengthening, in order to seek the lighting of structure, have selected the core of lightweight more, light wood core, honeycomb core or Polyurethane Foam Core etc. are used frequently as core.But, existing known light wood core, honeycomb core or Polyurethane Foam Core etc., be difficult to the core being prepared into thinner thickness, namely allow to obtain thin core, be destroyed when also there is preformed, the problem such as distortion when maybe can not tolerate shaping, in thin-walled property, there is certain restriction.
Simultaneously lightweight in order to realize, wall is thin and rigidity is high and the formed body of formation, the patent No. is 200580029564.7 disclose a kind of sandwich structural body, this sandwich structural body (III) is by core (I) and be configured in this core (I) two sides, the fiber-reinforced material (II) be made up of continuous reinforcement fiber (A) and matrix resin (B) is formed, wherein said core (I) has gap structure, described space is formed by the bubble of foaming body, or core is made up of discontinuous reinforcing fiber and thermoplastic resin, the space that described space is formed by infall mutual between the long filament of this reinforcing fiber is formed.But this sandwich structural body is the carbon fibre composite sheet material adopting common resin forming to become sandwich structural body, is common fabrication scheme in the market, there is intensity low, rigidity is inadequate, and molding cycle is long, and production automation degree is low, high in cost of production problem.
Summary of the invention
The object of the invention is to the deficiency overcoming above-mentioned existing existence, provide that a kind of cost is low, lightweight, intensity is high, the composite material sandwich structure body of good rigidly.
Another object of the present invention is to provide the preparation method of above-mentioned composite material sandwich structure body.
Another object of the present invention is to provide the application of above-mentioned composite material sandwich structure body.
The present invention is achieved through the following technical solutions:
A kind of composite material sandwich structure body, comprise core (I), be configured in the resin-based fibre reinforcement (II) of the upper and lower surface of this core (I), and the transition glued membrane tack coat (III) be formulated in the middle of core (I) and resin-based fibre reinforcement (II), described resin-based fibre reinforcement (II) is made up of resin matrix and fibre reinforcement, described core (I) is made up of epoxy resin, lightweight filler and fiber, and the proportion of described core (I) is 0.3g/cm 3~ 1.2g/cm 3, thickness is 0.1mm ~ 5.0mm.
The elastic modelling quantity of described core (I) is 10MPa ~ 30000MPa according to ASTMD638 test, and modulus of shearing is 10MPa ~ 150MPa according to ASTMD638 test; Proportion is preferably 0.5g/cm 3~ 1.0g/cm 3, thickness is preferably 0.6mm ~ 1.0mm.
Described core (I) as matrix, adds lightweight filler and fiber by epoxy resin in epoxy resin-base, and by steel plate or mold heated to 100 DEG C ~ 160 DEG C, pressure maintains 30kg ~ 100kg, molding time 30min ~ 60min and mixes.
Epoxy resin in described core (I) is by bisphenol-A, Bisphenol F or phenol aldehyde modified modified epoxy.Its preparation method can adopt conventional method of modifying, as add the fire retardant of N/P system, the filler of aluminium silicon class, promoter and amine system at bisphenol-A or Bisphenol F curing agent after, mixed and modifiedly to form.
The vitrification point Tg point of above-mentioned epoxy resin between 100 DEG C ~ 180 DEG C, preferably 120 DEG C ~ 150 DEG C.
The weight content of the halogen in above-mentioned epoxy resin is 0 ~ 1500ppm, preferably 0 ~ 600ppm.
Above-mentioned epoxy resin can choose fire-retardant and not fire-retardant epoxy resin as matrix, and when choosing fire-retardant epoxy resin as matrix, flame retardant rating reaches more than UL940-V0 level.
Lightweight filler in described core (I) accounts for the 10wt% ~ 50wt% of the gross weight of described core.This product has the advantages such as light weight, low heat conduction, higher intensity, good chemical stability, and its surface has oleophyllie hydrophobic performance through specially treated, is very easy to be scattered in organic material system.Described lightweight filler comprises hollow glass micropearl 60wt% ~ 100wt% and other fillers 0 ~ 40wt%, and other fillers described are the mixing of one or more in talcum powder, aluminium powder, carborundum powder or silicon nitride.
In described hollow glass micropearl, there is airtight bubbles of vacuum, processed through high-tech by one or more raw materials in borosilicate, calcium carbonate or aluminosilicate, granularity is 10 microns ~ 250 microns, wall thickness 1 micron ~ 2 microns, adds the density that hollow glass micropearl can reduce system in core (I).
In described core (I), fiber is continuous or discontinuous fibre, and the size of discontinuous fibre is between 0.1mm ~ 100mm, and continuous fiber is the performance of woven cloth form.Fiber is by with after specific epoxy resin and lightweight filler divide and mix and infiltrate, uniform crossover arrangement between fiber, the content of fiber is 10wt% ~ 70wt%, is selected from one or more in carbon fiber, glass fibre, basalt fibre, graphite fibre, aramid fiber, acrylic fiber or wood fibre.Different fiber and content can be selected according to performance requirement.
Resin matrix in described resin-based fibre reinforcement (II) is thermosetting resin, specifically can be preferably one or more in epoxy resin, phenolic resins, epoxy phenolics, unsaturated polyester resin or polyurethane resin; Fibre reinforcement is preferably one or more in carbon fiber, glass fibre, basalt fibre or aramid fiber, and these fibers can be continuous fiber or discontinuous fibre.
Described transition glued membrane tack coat (III) is made up of resin glued membrane or resin-based fibre reinforced materials, and thickness is 0.02mm ~ 2.0mm, and density is 0.9g/cm 3~ 1.3g/cm 3.
Described resin glued membrane is made up of one or more in epoxy resin, phenolic resins, epoxy phenolics, unsaturated polyester resin or polyurethane resin; Resin matrix in described resin-based fibre reinforced materials is one or more in epoxy resin, phenolic resins, epoxy phenolics, unsaturated polyester resin or polyurethane resin, and wherein the content of resin matrix is 35wt% ~ 70wt%; Fibre reinforced materials can be one or more in continuous print carbon fiber, glass fibre, basalt fibre or aramid fiber, and have tiling or woven cloth fiber appearance structure continuously, wherein, the specification of glass fiber woven cloth is 25gsm ~ 300gsm.Fibre reinforced materials can also for discontinuous size be greater than in carbon fiber, glass fibre, basalt fibre or the aramid fiber that short fiber that the long fibre of 2mm or size be less than 2mm forms one or more, described resin matrix and discontinuous fibre intersect to form gap structure after infiltrating mutually.
The preparation method of the transition glued membrane tack coat (III) be made up of resin-based fibre reinforced materials is by being coated in by thermosetting resin above release liners/film, then by fibre reinforced materials uniform spreading on resin molding, by being heated to about 70 DEG C, with heating two roller bearing steel roll roll after make.
The effect of described transition glued membrane tack coat (III) mainly coordinates resin-based fibre reinforcement (II) and core (I) as bonding agent, increases cohesive force therebetween.
The preparation method of composite material sandwich structure body of the present invention, comprises the steps:
By core (I), the resin-based fibre reinforcement (II) being configured in the upper and lower surface of this core (I), and be formulated in
Transition glued membrane tack coat (III) in the middle of core (I) and resin-based fibre reinforcement (II) is having in shiny surface flat plate mold, solidify to form through composite heating, the Stress control of heating is between 10kg ~ 180kg, temperature controls between 80 DEG C ~ 200 DEG C, and the time keeps 1min ~ 30min.
The application of composite material sandwich structure body of the present invention in 3C industry, household electric appliances, automobile industry, aviation, track traffic industry and relevant cabinet surface texture sheet material.
The present invention compared with prior art, has following beneficial effect:
1) the present invention by core composition optimization, the composite material sandwich structure body prepared have lightweight,
While the advantages such as intensity is high, good rigidly, significantly can reduce the cost of product, improve the market competitiveness;
2) under particular requirement, the performance requirement of low halogen (being less than 600ppm) can be accomplished;
3) preparation technology of the present invention is simple, can be applicable to 3C industry, household electric appliances, automobile industry, aviation, track traffic
The surface texture sheet materials such as industry and relevant cabinet.
Accompanying drawing explanation
Fig. 1 is the structural representation of composite material sandwich structure body of the present invention.
Detailed description of the invention
Further illustrate the present invention below by detailed description of the invention, following examples are the present invention's preferably embodiment, but embodiments of the present invention are not by the restriction of following embodiment.
The material adopted in the embodiment of the present invention and comparative example is as follows:
Epoxy resin: by bisphenol-A or bisphenol F resin, after adding the curing agent of the fire retardant of N/P system, the filler of the fire-retardant class of aluminium silicon, promoter and amine system, mixed and modifiedly to form.This epoxy resin is through test, and elastic modelling quantity is according to GB/T9341-2008 test at 1 ~ 3Gpa, and hot strength is tested at 100 ~ 300MPa according to GB/T1040-2006.
As shown in Figure 1, a kind of composite material sandwich structure body, comprise core (I), be configured in the resin-based fibre reinforcement (II) of the upper and lower surface of this core (I), and be formulated in the transition glued membrane tack coat (III) in the middle of core (I) and resin-based fibre reinforcement (II).
embodiment 1:
Be matrix with epoxy resin, in epoxy resin-base, add 10wt% lightweight filler (mixture be made up of talcum powder, aluminium powder, carborundum powder, silicon nitride 60wt% hollow glass micropearl and 40wt% is formed) and 40wt% carbon fiber (size 3-5mm), be heated to 120 DEG C in a mold, pressure maintains 50kg, molding time 30min mixes core, and the proportion of core is 1.1g/cm 3, thickness is 1.0mm, and elastic modelling quantity is 23000MPa according to ASTMD638 test, and modulus of shearing is 80MPa according to ASTMD638 test;
Having in shiny surface mould, above-mentioned core upper and lower faces note is covered the transition glued membrane tack coat (thickness is 0.05mm) be made up of 40wt% thermosetting epoxy resin and glass fiber woven cloth (specification 50gsm), and then on transition glued membrane tack coat, paste the resin-based fibre reinforcement be made up of epoxy resin and carbon fiber, last composite heating solidification, the Stress control of heating is at 100kg, temperature controls at 150 DEG C, and the time keeps 10min, obtains composite material sandwich structure body.Test its property indices, the results are shown in Table 1.
embodiment 2:
Take epoxy resin as matrix, pass through in epoxy resin-base, add 30wt% lightweight filler (mixture be made up of talcum powder, aluminium powder, carborundum powder, silicon nitride 70wt% hollow glass micropearl and 30wt% is formed) and 20wt% carbon fiber (size 50mm), be heated to 130 DEG C in a mold, pressure maintains 80kg, molding time 40min mixes core, and the proportion of core is 0.8g/cm 3, thickness is 1.0mm, and elastic modelling quantity is 12000MPa according to ASTMD638 test, and modulus of shearing is 60MPa according to ASTMD638 test;
By the resin-based fibre reinforcement be made up of epoxy resin and carbon fiber 3K woven cloth, the transition glued membrane tack coat (thickness is 0.1mm) be made up of 50wt% thermosetting epoxy resin and carbon fiber 3K woven cloth and above-mentioned core having in shiny surface flat plate mold composite heating solidification, the Stress control of heating is at 100kg, temperature controls at 150 DEG C, time keeps 10min, obtains composite material sandwich structure body.Test its property indices, the results are shown in Table 1.
embodiment 3:
Take epoxy resin as matrix, by adding 50wt% lightweight filler (mixture be made up of talcum powder, aluminium powder, carborundum powder, silicon nitride 80wt% hollow glass micropearl and 20wt% is formed) and 10wt% basalt fibre (size 20mm) is heated to 140 DEG C in a mold in epoxy resin-base, pressure maintains 30kg, molding time 50min mixes core, and the proportion of core is 0.6g/cm 3, thickness is 1.0mm, and elastic modelling quantity is 6500MPa according to ASTMD638 test, and modulus of shearing is 30MPa according to ASTMD638 test;
By the resin-based fibre reinforcement be made up of epoxy resin and basalt fibre woven cloth, the transition glued membrane tack coat (thickness is 0.06mm) be made up of 60wt% thermosetting epoxy resin and glass fiber woven cloth (specification 100gsm) and above-mentioned core having in shiny surface flat plate mold composite heating solidification, the Stress control of heating is at 100kg, temperature controls at 150 DEG C, time keeps 10min, obtains composite material sandwich structure body.Test its property indices, the results are shown in Table 1.
embodiment 4:
Take epoxy resin as matrix, pass through in epoxy resin-base, add 20wt% lightweight filler (mixture be made up of talcum powder, aluminium powder, carborundum powder, silicon nitride 90wt% hollow glass micropearl and 10wt% is formed) and 30wt% aramid fiber (size 30mm), be heated to 150 DEG C in a mold, pressure maintains 70kg, molding time 35min mixes core, and the proportion of core is 0.9g/cm 3, thickness is 1.0mm, and elastic modelling quantity is 8000MPa according to ASTMD638 test, and modulus of shearing is 50MPa according to ASTMD638 test;
By the resin-based fibre reinforcement be made up of epoxy resin and aramid fiber woven cloth, to be made up of transition glued membrane tack coat (thickness is 0.05mm) and above-mentioned core 35wt% thermosetting epoxy resin and glass fiber woven cloth (specification 200gsm) having composite heating solidification in shiny surface flat plate mold, the Stress control of heating is at 100kg, temperature controls at 150 DEG C, time keeps 10min, obtains composite material sandwich structure body.Test its property indices, the results are shown in Table 1.
embodiment 5:
Take epoxy resin as matrix, pass through in epoxy resin-base, add 40wt% lightweight filler (being made up of 75wt% hollow glass micropearl and 25% mixture be made up of talcum powder, aluminium powder, carborundum powder, silicon nitride) and 30wt% glass fibre (size 40mm), be heated to 120 DEG C in a mold, pressure maintains 30kg, molding time 40min mixes core, and the proportion of core is 1.0g/cm 3, thickness is 1.0mm, and elastic modelling quantity is 8000MPa according to ASTMD638 test, and modulus of shearing is 50MPa according to ASTMD638 test;
By the resin-based fibre reinforcement be made up of epoxy resin and continuous carbon fibre, to be made up of transition glued membrane tack coat (thickness is 0.07mm) and above-mentioned core thermosetting epoxy resin having composite heating solidification in shiny surface flat plate mold, the Stress control of heating is at 100kg, temperature controls at 150 DEG C, time keeps 10min, obtains composite material sandwich structure body.Test its property indices, the results are shown in Table 1.
comparative example 1:
Core uses (Shao and electrician's (strain) make " EFCELL(registration mark) " RC2010, independent expanded polypropylene (thickness 1mm, proportion 0.48g/cm 3);
By the resin-based fibre reinforcement be made up of epoxy resin and carbon fiber 3K woven cloth and above-mentioned core having composite heating solidification in shiny surface mould, the Stress control of heating is at 100kg, temperature controls at 150 DEG C, and the time keeps 10min, obtains composite material sandwich structure body.Test its property indices, the results are shown in Table 1.
comparative example 2:
Using thermoplastic resin matrix's fibre reinforcement material as core, wherein, infiltrate resin intersect to form gap structure in described core between thermoplastic resin matrix's polypropylene PP and carbon fiber by fiber, described fiber infiltrates resin length at more than 10nm; The proportion of described core is 1.0g/cm 3, thickness is 1.0mm;
By the resin-based fibre reinforcement be made up of acrylic resin and carbon fiber continuous fiber and above-mentioned core having composite heating solidification in shiny surface flat plate mold, the Stress control of heating is at 100kg, temperature controls at 260 DEG C, and the time keeps 20s, obtains composite material sandwich structure body.Test its property indices, the results are shown in Table 1.
The test performance result of the sandwich structural body of table 1 embodiment 1 ~ 5 and comparative example 1 ~ 2
　 Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Comparative example 1 Comparative example 2
Proportion 1.3 1.1 1.2 1.4 1.2 0.9 1.2
Thickness/mm 2 2 2 2 2 2 2
Bending modulus/Gpa 43 36 18 22 52 13 10
Bending strength/Mpa 500 400 210 250 560 150 230
Properties method of testing:
Proportion: by GB1033-86, the proportion of test clip laminar structure;
Thickness: by micrometer or slide measure test sheet metal thickness;
Bending strength: Plastics-Oetermination of flexural properties GB/T9341-2008;
Bending modulus: Plastics-Oetermination of flexural properties GB/T9341-2000.

Claims (15)

1. a composite material sandwich structure body, is characterized in that, comprises core (I), is configured in the upper of this core (I)
The resin-based fibre reinforcement (II) of lower surface, and the transition glued membrane tack coat (III) be formulated in the middle of core (I) and resin-based fibre reinforcement (II), described resin-based fibre reinforcement (II) is made up of resin matrix and fibre reinforcement, described core (I) is made up of epoxy resin, lightweight filler and fiber, and the proportion of described core (I) is 0.3g/cm 3~ 1.2g/cm 3, thickness is 0.1mm ~ 5.0mm.
2. composite material sandwich structure body according to claim 1, is characterized in that: the elastic modelling quantity of described core (I) is 10MPa ~ 30000MPa according to ASTMD638 test, and modulus of shearing is 10MPa ~ 150MPa according to ASTMD638 test; Proportion is 0.5g/cm 3~ 1.0g/cm 3, thickness is 0.6mm ~ 1.0mm.
3. composite material sandwich structure body according to claim 1, is characterized in that: the epoxy resin in described core (I) is by bisphenol-A, Bisphenol F or phenol aldehyde modified modified epoxy.
4. composite material sandwich structure body according to claim 3, is characterized in that: the vitrification point Tg point of the epoxy resin in described core (I) between 100 DEG C ~ 180 DEG C, preferably 120 DEG C ~ 150 DEG C.
5. composite material sandwich structure body according to claim 3, is characterized in that: the weight content of the halogen in the epoxy resin in described core (I) is 0 ~ 1500ppm, preferably 0 ~ 600ppm.
6. composite material sandwich structure body according to claim 1, is characterized in that: in described core (I), lightweight filler accounts for the 10wt% ~ 50wt% of described core gross weight.
7. composite material sandwich structure body according to claim 6, is characterized in that: described lightweight filler comprises hollow glass micropearl 60wt% ~ 100wt%, other fillers 0 ~ 40wt%.
8. composite material sandwich structure body according to claim 7, is characterized in that: other fillers described are the mixing of one or more in talcum powder, aluminium powder, carborundum powder or silicon nitride.
9. composite material sandwich structure body according to claim 1, it is characterized in that: the fiber in described core (I) is continuous or discontinuous fibre, its content is 10wt% ~ 70wt%, uniform crossover arrangement between described fiber, size, between 0.1mm ~ 100mm, is selected from one or more in carbon fiber, glass fibre, basalt fibre, graphite fibre, aramid fiber, acrylic fiber or wood fibre.
10. composite material sandwich structure body according to claim 1, it is characterized in that: the resin matrix in described resin-based fibre reinforcement (II) is thermosetting resin, and fibre reinforcement is one or more in carbon fiber, glass fibre, basalt fibre or aramid fiber.
11. composite material sandwich structure bodies according to claim 10, is characterized in that: described thermosetting resin is one or more in epoxy resin, phenolic resins, epoxy phenolics, unsaturated polyester resin or polyurethane resin.
12. composite material sandwich structure bodies according to claim 1, is characterized in that: described transition glued membrane tack coat (III) is made up of resin glued membrane or resin-based fibre reinforced materials, and thickness is 0.02mm ~ 2.0mm, and density is 0.9g/cm 3~ 1.3g/cm 3.
13. composite material sandwich structure bodies according to claim 12, is characterized in that: described resin glued membrane is made up of one or more in epoxy resin, phenolic resins, epoxy phenolics, unsaturated polyester resin or polyurethane resin; Resin matrix in described resin-based fibre reinforced materials is one or more in epoxy resin, phenolic resins, epoxy phenolics, unsaturated polyester resin or polyurethane resin, fibre reinforced materials is one or more in continuous or discrete carbon fiber, glass fibre, basalt fibre or aramid fiber, and wherein the content of resin matrix is 35wt% ~ 70wt%.
The preparation method of 14. composite material sandwich structure bodies according to any one of claim 1 ~ 13, is characterized in that, comprise the steps:
By core (I), the resin-based fibre reinforcement (II) being configured in the upper and lower surface of this core (I), and be formulated in
Transition glued membrane tack coat (III) in the middle of core (I) and resin-based fibre reinforcement (II) is having in shiny surface mould, solidify to form through composite heating, the Stress control of heating is between 10kg ~ 180kg, and temperature controls between 80 DEG C ~ 200 DEG C, and the time keeps 1min ~ 30min.
15. application of composite material sandwich structure body in 3C consumer electronics industry, household electric appliances, automobile industry, aviation, track traffic industry and relevant cabinet surface texture sheet material according to any one of claim 1 ~ 13.
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