阅读说明：本技术 一种纤维金属层板复合材料及其制备方法 (Fiber metal laminate composite material and preparation method thereof ) 是由 葛增如 刘建光 彭俊阳 王卫东 陈鑫 张嘉振 于 2021-01-07 设计创作，主要内容包括：本发明公开了一种纤维金属层板复合材料及其制备方法,属于先进复合材料的制备及成形领域。该方法包括：取金属薄板,对其表面依次进行脱脂处理、酸洗、阳极氧化处理以及喷涂底胶；通过超声波辅助辊压设备在工作平台上交替铺设金属薄板和纤维树脂层,铺叠过程中逐层进行超声和辊压,铺设完成后对成型纤维金属层板进行冷却；待成型纤维金属层板冷却至室温后,打开工作平台,取出制备的纤维金属层板复合材料。本发明采用独创的超声波辅助辊压设备通过超声波振动对纤维金属层板进行超声处理,超声固结增材制造方法无需热压罐工序,缩短制备时间,提高了制备效率。(The invention discloses a fiber metal laminate composite material and a preparation method thereof, belonging to the field of preparation and forming of advanced composite materials. The method comprises the following steps: taking a metal sheet, and sequentially carrying out degreasing treatment, acid cleaning, anodic oxidation treatment and primer spraying on the surface of the metal sheet; alternately laying metal sheets and fiber resin layers on a working platform through ultrasonic-assisted rolling equipment, carrying out ultrasonic and rolling layer by layer in the laying process, and cooling a formed fiber metal laminate after laying is finished; and opening the working platform after the formed fiber metal laminate is cooled to room temperature, and taking out the prepared fiber metal laminate composite material. The invention adopts the original ultrasonic auxiliary rolling equipment to carry out ultrasonic treatment on the fiber metal laminate through ultrasonic vibration, and the ultrasonic consolidation material increase manufacturing method does not need the autoclave process, shortens the preparation time and improves the preparation efficiency.)

1. A method for preparing a fiber metal laminate composite material is characterized by comprising the following steps:

step 1: taking a metal sheet, and sequentially carrying out degreasing treatment, acid cleaning, anodic oxidation treatment and primer spraying on the surface of the metal sheet;

step 2: alternately laying the metal thin plate and the fiber resin layer processed in the step (1) on a working platform through ultrasonic-assisted rolling equipment, carrying out ultrasonic and rolling layer by layer in the laying process, and cooling the formed fiber metal laminate after laying;

and step 3: and opening the working platform after the formed fiber metal laminate is cooled to room temperature, and taking out the prepared fiber metal laminate composite material.

2. The preparation method according to claim 1, wherein in the step 1, the anodic oxidation treatment process: immersing the metal sheet into a phosphoric acid or complex acid solution, taking the metal sheet as an anode material and a lead plate as a cathode material, switching on a power supply within 1min, then increasing the direct-current voltage between the electrode plates from 0V to 15 +/-1V within 2min, continuing for 20min, and taking out the metal sheet from the solution within 1min after the anodizing process is finished.

3. The manufacturing method according to claim 1, wherein in the step 2, the ultrasonic-assisted rolling device comprises a laying controller, a heating roller controller, a working platform, a first pressure roller, an ultrasonic unit, a cooling roller and a cooling water channel.

4. The method for preparing according to claim 3, wherein in the ultrasonic-assisted rolling device:

the laying controller is positioned above the working platform, can move along the laying direction, adjusts the laying angle and the laying speed, and is fixedly connected with the heating roller, the first pressure roller, the ultrasonic unit and the cooling roller;

the heating roller is positioned between the metal sheet/fiber resin layer laid on the working platform and the fiber resin layer/metal sheet to be laid;

the heating roller controller is positioned in the heating roller and used for controlling the heating temperature of the heating roller to heat;

the first pressure roller is positioned on the fiber resin layer/metal sheet to be laid and applies pressure;

the ultrasonic unit is positioned behind the first pressure roller in the horizontal laying direction;

the cooling roller is located behind the ultrasonic unit in the horizontal laying direction, and a cooling water channel is arranged inside the cooling roller.

5. The production method according to claim 4, wherein the ultrasonic unit is composed of an ultrasonic controller and an ultrasonic generator, the ultrasonic controller and the ultrasonic generator being located inside the second pressure roller, the ultrasonic unit being movable with the placement controller by controlling the ultrasonic generator to adjust the second pressure roller vibration frequency.

6. The method for preparing according to claim 5, wherein the step 2 comprises:

step 21: laying a metal sheet/fiber resin layer on a working platform;

step 22: placing a fiber resin layer/metal sheet to be laid on the laid metal sheet/fiber resin layer, and controlling the heating temperature of a heating roller through a heating roller controller to preheat and lay the fiber resin layer to form a laying layer;

step 23: starting an ultrasonic unit, carrying out ultrasonic treatment on the laying layer, further melting the resin of the laying layer, filling and compacting, and discharging internal gas;

step 24: applying pressure to the layup layer by a first pressure roller such that the layup layer is tightly filled;

step 25: the steps 21 to 24 are repeated and the formed shaped fiber metal laminate is cooled.

7. The manufacturing method according to claim 1, wherein the aluminum alloy sheet after phosphoric acid anodizing surface treatment is protected by primer coating within 8h, wherein the primer coating thickness is as follows: 10 mu m; and after the primer is sprayed, standing at room temperature for 10-20 min, and drying at 60 ℃ for 30 min.

8. The production method according to claim 1, wherein the metal sheet comprises an aluminum alloy sheet, a titanium alloy sheet, an aluminum lithium alloy sheet, a stainless steel sheet.

9. The production method according to claim 1, wherein the fiber resin layer is a thermoplastic resin composite prepreg or is composed of a fiber layer and a thermoplastic resin film.

10. A fiber metal laminate composite, characterized in that it is obtained by a process according to any one of claims 1 to 9, consisting of alternately laid metal sheets and layers of fiber resin.

Technical Field

The invention particularly relates to a fiber metal laminate composite material and a preparation method thereof, belonging to the field of preparation and forming of advanced composite materials. According to the invention, the thermoplastic resin-based fiber metal laminate is prepared by using a hot roller press-fit ultrasonic vibration method, so that the interlayer performance of the laminate can be remarkably improved while the preparation efficiency is improved.

Background

The existing processes for the preparation of thermoplastic FMLs can be divided into two categories, autoclave processes and non-autoclave processes, depending on the equipment used. In the former method, the composite material is heated and pressurized by utilizing a uniform temperature field and air pressure in the tank body, and the fiber reinforced thermoplastic composite material formed by the method has low porosity, uniform resin content and compact internal structure. However, the thermoplastic composite material has high melting point and high viscosity, so that high requirements are put on the temperature and pressure of an autoclave, the air heating efficiency is low, the molding period is long, the high-temperature auxiliary material is expensive, and the production cost is high. The preparation of thermoplastic composite materials by non autoclave process has become a hot point of research in recent years. Among them, the hot pressing method, especially the hot rolling method, is the key development direction, and various methods for manufacturing thermoplastic fiber metal laminate by the hot rolling method are proposed in succession.

How to improve the interlayer strength of the fiber metal laminate is always the core problem of the preparation of the fiber metal laminate.

Chinese patent CN201710500700.0 discloses a powder laminating process for rapidly preparing magnesium-based fiber metal laminates, which comprises the steps of stacking magnesium alloy plates, thermoplastic resin powder and alkali-free glass fiber plain woven cloth in sequence into a hot-pressing mould, compacting the mould, and then putting the compacted mould into an electric heating air circulation box type furnace for heating and curing to prepare FMLs, thereby greatly reducing the preparation cost. However, the process does not specially treat the metal plate by a physical method (anodic oxidation), does not adopt a special method for exhausting gas, only applies pressure to solidify the thermoplastic resin, and has low interlayer bonding performance.

The chinese invention patent CN201710998704.6 discloses a method for improving metal bonding strength by using metal complexes. The design method comprises the steps of firstly, etching and constructing a micro-nano structure on a clean metal plate by an anodic oxidation method; then hydroxylating the surface of the metal plate; preparing a bis-salicylaldehyde Schiff base ligand and a metal complex thereof; the Schiff base metal complex is self-assembled on the surface of the metal plate; the interface strength between the metal and the resin is improved by the actions of mechanical engaging force, chemical bonds, molecular entanglement and the like. The method only improves the interface bonding strength by a physical method (anodic oxidation) and a chemical method (surface modification and preparation of metal complexes thereof) and does not improve the aspect of a molding process to reduce the porosity of the laminate.

Disclosure of Invention

Aiming at the thermoplastic resin-based fiber metal laminate, ultrasonic treatment is carried out on the fiber metal laminate by ultrasonic vibration through an original ultrasonic auxiliary rolling device. Through ultrasonic vibration, the discharge of air bubbles in the thermoplastic resin can be accelerated, and the porosity of the laminate is obviously reduced; on the other hand, the mechanical engagement between the resin and the surface of the metal plate micro-nano structure is facilitated, and the interface bonding strength is improved. Meanwhile, ultrasonic treatment is carried out while rolling, so that the fiber distribution is more uniform, the rolling pressure is reduced, and the rolling time is shortened. In addition, the ultrasonic consolidation material increase manufacturing method does not need an autoclave process, shortens the preparation time and improves the preparation efficiency.

The invention solves the problem of insufficient interlayer strength of the metal laminate by ultrasonic vibration treatment in the hot rolling process, has simple preparation process, short preparation period and low cost, and is suitable for large-scale production.

According to a first aspect of the present invention, there is provided a method of making a fiber metal laminate composite comprising:

step 1: taking a metal sheet, and sequentially carrying out degreasing treatment, acid cleaning, anodic oxidation treatment and primer spraying on the surface of the metal sheet;

step 2: alternately laying metal sheets and fiber resin layers on a working platform through ultrasonic-assisted rolling equipment, carrying out ultrasonic and rolling layer by layer in the laying process, and cooling a formed fiber metal laminate after laying is finished;

and step 3: and opening the working platform after the formed fiber metal laminate is cooled to room temperature, and taking out the prepared fiber metal laminate composite material.

Further, in the step 1, the organic solvent used for degreasing is alcohol or acetone.

Further, in the step 1, mixed acid solution prepared from nitric acid and hydrofluoric acid is adopted for acid cleaning, and cleaning is carried out for 3mins at room temperature.

Further, in the step 1, the anodic oxidation treatment process comprises: immersing the metal sheet into a phosphoric acid or complex acid solution, taking the metal sheet as an anode material and a lead plate as a cathode material, switching on a power supply within 1min, then keeping the direct-current voltage between the pole plates from 0V to 15 +/-1V within 2min for 20min, and taking the metal sheet out of the solution within 1min after the anodizing process is finished.

Further, in the step 1, the primer material: d-12; the thickness of the primer is controlled to be 10 mu m.

Further, in step 2, the ultrasonic auxiliary rolling device includes a laying controller, a heating roller controller, a work platform, a first pressure roller, an ultrasonic unit, a cooling roller, and a cooling water channel.

Further, in the ultrasonic-assisted rolling device:

the laying controller is positioned above the working platform, can move along the laying direction, adjusts the laying angle and the laying speed, and is fixedly connected with the heating roller, the first pressure roller, the ultrasonic unit and the cooling roller;

the heating roller is positioned between the metal sheet/fiber resin layer laid on the working platform and the fiber resin layer/metal sheet to be laid;

the heating roller controller is positioned in the heating roller and used for controlling the heating temperature of the heating roller to heat;

the first pressure roller is positioned on the fiber resin layer/metal sheet to be laid and applies pressure;

the ultrasonic unit is positioned behind the first pressure roller in the laying direction;

the cooling roller is located behind the ultrasonic unit in the laying direction, and a cooling water channel is arranged inside the cooling roller.

Further, the laying controller can move along the laying direction and adjust the laying angle and the laying speed.

Further, the laying controller comprises a laying chuck and a mechanical control arm connected with the laying chuck.

Furthermore, a heating device and a laying positioning device are arranged in the mechanical control arm.

Furthermore, the ultrasonic unit consists of an ultrasonic controller, an ultrasonic generator and a second pressure roller, wherein the ultrasonic controller and the ultrasonic generator are positioned inside the second pressure roller, and the ultrasonic generator is controlled by the ultrasonic controller to adjust the vibration frequency of the second pressure roller.

Further, the ultrasonic generator is connected with a tool head and a mechanical pressure arm.

Further, the ultrasonic unit is movable with the placement controller.

Furthermore, a cooling water channel is arranged inside the cooling roller.

Further, a heating roller controller is arranged inside the heating roller and used for controlling the heating temperature of the heating roller to heat.

Furthermore, the heating roller controller consists of a heating switch and a mechanical pressure arm.

Further, the step 2 comprises:

step 21: laying a metal sheet/fiber resin layer on a working platform;

step 22: placing a fiber resin layer/metal sheet to be laid on the laid metal sheet/fiber resin layer, and controlling the heating temperature of a heating roller through a heating roller controller to preheat and lay the fiber resin layer to form a laying layer;

step 23: starting an ultrasonic unit, carrying out ultrasonic treatment on the laying layer, further melting the resin of the laying layer, filling and compacting, and discharging internal gas;

step 24: applying pressure to the layup layer by a first pressure roller such that the layup layer is tightly filled;

step 25: the steps 21 to 24 are repeated and the formed shaped fiber metal laminate is cooled.

Further, in step 24, the first pressure roller maintains a constant pressure.

And further, fully stirring and shaking the glue solution before use, and pouring out the glue solution after no precipitate is at the bottom.

Further, the aluminum alloy sheet after phosphoric acid anodization surface treatment must be protected by primer in 8h, primer thickness: 10 mu m; after the primer is sprayed, standing at the ambient temperature for 10-20 min, and drying at 60 ℃ for 30 min;

further, the metal sheet includes an aluminum alloy sheet, a titanium alloy sheet, an aluminum lithium alloy sheet, and a stainless steel sheet.

Furthermore, the fiber resin layer is a thermoplastic resin composite prepreg or is composed of a fiber layer and a thermoplastic resin film.

Further, the fiber material comprises carbon fiber, glass fiber, aramid fiber and high-density polyethylene fiber; the thermoplastic resin includes PA, PS, PEEK, PCBT, PP, PE, and PI resin.

According to a second aspect of the present invention, there is provided a fiber metal laminate composite material obtained by the method of any one of the above aspects, the fiber metal laminate composite material being composed of a metal thin plate and a fiber resin layer alternately laid down.

The invention has the beneficial effects that:

aiming at the defects in the prior art, the invention provides a brand-new method for manufacturing the thermoplastic fiber metal laminate, namely ultrasonic consolidation additive manufacturing, wherein the fiber metal laminate is subjected to ultrasonic treatment by adopting original ultrasonic-assisted rolling equipment through ultrasonic vibration in the laying process, so that the discharge of air bubbles in thermoplastic resin can be accelerated, and the porosity of the laminate is remarkably reduced; on the other hand, the mechanical engagement between the resin and the surface of the metal plate micro-nano structure is facilitated, and the interface bonding strength is improved. In addition, the ultrasonic-assisted rolling equipment is simple in structure and convenient to operate, so that the ultrasonic consolidation additive manufacturing method does not need an autoclave process, the preparation time is shortened, and the preparation efficiency is improved.

The additive manufacturing method of the invention solves the problem of insufficient interlayer strength of the fiber metal laminate by matching the hot press roller with the ultrasonic consolidation, has simple preparation process, short preparation period and low cost, and is suitable for large-scale production.

Drawings

FIGS. 1a to 1b show a schematic view of an ultrasonic assisted rolling device for thermoplastic fiber metal laminate according to an embodiment of the present invention;

fig. 2a to 2b show a fiber metal laminate structure according to one embodiment of the invention;

fig. 3a to 3b show a fiber metal laminate structure according to another embodiment of the invention;

FIG. 4 is a flow chart of a process for making a thermoplastic resin based fiber metal laminate according to an embodiment of the present invention.

The method comprises the following steps of 1-laying controller, 2-fiber prepreg/metal sheet to be laid, 3-heating roller, 4-heating roller controller, 5-laid metal sheet/fiber prepreg, 6-working platform, 7-first pressure roller, 8-ultrasonic unit, 9-cooling roller and 10-cooling water channel.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terms "first," "second," and the like in the description and in the claims of the present disclosure are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

A plurality, including two or more.

And/or, it should be understood that, for the term "and/or" as used in this disclosure, it is merely one type of association that describes an associated object, meaning that three types of relationships may exist. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone.

The invention provides a fiber metal laminate composite material and a preparation method thereof, which comprises the steps of firstly carrying out anodic oxidation treatment on a metal plate, alternately laying a metal sheet and a thermoplastic composite material prepreg, and then carrying out ultrasonic treatment on the fiber metal laminate for a certain time by a high-power push-pull ultrasonic generator in the laying process, on one hand, the fiber metal laminate composite material is beneficial to removing micro bubbles in resin and reducing porosity, on the other hand, the fiber metal laminate composite material is beneficial to forming mechanical engagement between the resin and the surface of a micro-nano structure of the metal plate, and the interface bonding strength is improved. And finally, cooling and forming the laminate product. The technological process mainly comprises the steps of metal sheet surface treatment, laying, preheating, ultrasonic treatment, pressurization, cooling and the like.

As shown in fig. 4, the above process for preparing a thermoplastic fiber metal laminate specifically includes the following steps:

1) surface treatment of the metal sheet: sequentially carrying out degreasing treatment, acid washing, anodic oxidation treatment and primer spraying on the metal sheet.

2) Laying in sequence: and (3) alternately laying the metal thin plates and the fiber resin composite materials in sequence according to design requirements.

a) Heating: during the laying process, the resin in the prepreg is preheated to T1 temperature and completely melted by auxiliary heating of a heating roller and a hot air gun.

b) Ultrasonic consolidation: and starting the ultrasonic generation controller in the laying process to vibrate the ultrasonic assembly so as to ultrasonically process the fiber metal laminate in the mold, increase the fluidity of the resin and further densely fill the resin and discharge the internal gas.

c) Pressurizing: and pressurizing to P by using a pressure roller in the laying process so as to tightly fill the metal sheet and the fiber prepreg. At the same time, the pressure roller is kept at pressure P.

3) And (3) after the laying in the step 2 is finished, cooling the air, and taking out the fiber metal laminate.

In fig. 1a to 1b, an ultrasonic-assisted molding apparatus for thermoplastic fiber metal laminate is shown, comprising: a laying controller 1, a metal sheet or fiber prepreg 2, a heating roller 3, a heating roller controller 4, a fiber metal laminate 5, a work platform 6, a first pressure roller 7, an ultrasonic unit 8, a cooling roller 9, and a cooling water passage 10. Wherein the fiber metal laminate is directly laid on the working platform 6 and fixed by the clamp; the laying controller 1 is positioned above the working platform 6, and can adjust the laying angle and the laying speed; the heating roller 3 is positioned above the laid prepreg and can move along with the laying controller 1, and the heating temperature is controlled by the heating controller 4 to heat the prepreg; the first pressure roller 7 is positioned above the metal sheet or the fiber prepreg 2 and can move along with the laying controller 1 to give pressure to the fiber metal laminate so as to enable the fiber metal laminate to be more tightly combined; the ultrasonic wave unit 8 is positioned behind the first pressure roller (in the laying direction), consists of an ultrasonic controller, an ultrasonic generator and a second pressure roller, the ultrasonic generator is connected with a tool head (roller) and a mechanical pressure arm, the ultrasonic controller and the ultrasonic generator are positioned in the second pressure roller, and the ultrasonic generator is controlled by the ultrasonic controller to adjust the vibration frequency of the second pressure roller and can move along with the laying controller 1; the cooling roller 9 is located behind the ultrasonic unit 8 (in the laying direction), and cools the fiber metal laminate through cooling water by the cooling water channel 10, and applies a certain pressure to the fiber metal laminate, and the fiber metal laminate can move along with the laying controller 1.

The laying controller 1 comprises a laying chuck and a mechanical control arm connected with the laying chuck, a heating device and a laying positioning device are arranged in the mechanical control arm, and the laying angle and speed of the mechanical control arm are controlled by a program.

The heating roller controller 4 is composed of a heating switch and a mechanical pressure arm connected with the heating switch, and can control the heating temperature and the rolling pressure thereof through a program.

Example 1

The metal plate used in example 1 of the present invention was an aluminum alloy (2024) sheet, and the thermoplastic composite material used was a glass fiber-reinforced polyphenylene sulfide (GF/PPS) prepreg, and the fiber form was a woven fabric. An 2/1 or 3/2 layering structure is adopted, namely a layer of GF/PPS prepreg is added between two layers of aluminum alloy sheets.

The method specifically comprises the following steps:

1. the aluminum alloy surface treatment process flow is as follows:

a) preliminary preparation: wiping off oil stains on the surface of the test piece by using absolute ethyl alcohol or acetone;

b) alkali cleaning: washing with alkaline washing solution at 60 deg.C for 90 s;

c) rinsing: rinsing in overflowing clean tap water for 2 min;

d) acid cleaning: placing the test piece in a pickling solution for pickling for 3 min;

e) rinsing: rinsing in overflowing tap water for at least 5 min;

f) phosphoric acid anodizing: the parts are immersed in phosphoric acid solution, a lead plate is used as a cathode material, a power supply is switched on within 1min, and then the direct current voltage between the pole plates is 0V to 15 +/-1V within 2min and lasts for 20 min. After the anodization process is finished, taking out the test piece from the phosphoric acid solution within 1 min;

g) rinsing: rinsing in overflowing clean tap water, wherein the temperature of the rinsing water is below 43 ℃, and the rinsing time is at least 5 min;

h) sealing holes by boiling water: the hole sealing liquid adopts ionized water or distilled water, the temperature is above 95 ℃, the PH value is 5.5-6.5, acetic acid and ammonia water are used for adjusting, and the hole sealing time is 20-30 min;

i) drying: drying at a temperature not higher than 60 deg.C, and drying thoroughly. The time is not more than 2 h.

g) Spraying primer: primer material: d-12; the thickness of the primer is controlled to be 10 mu m.

The glue solution is fully stirred and shaken up before use, the glue solution can be poured out when no precipitate exists at the bottom, the aluminum alloy sheet after phosphoric acid anodizing surface treatment needs primer protection in 8h, and the primer thickness is as follows: 10 mu m; after the primer is sprayed, standing at the ambient temperature for 10-20 min, and drying at 60 ℃ for 30 min; can be stored for 1 month at 20 deg.C and relative humidity of not more than 65%.

2) Layup-additive manufacturing process

a) Metal layer lay-up

Preheating a heating roller to 320 ℃ to completely melt the polyphenylene sulfide resin; simultaneously keeping the pressure applied by the pressure head at 0.5 MPa; and starting a high-power push-pull type ultrasonic generation controller during the laying pressurization process, wherein the frequency is 20kHz, and the amplitude is 40 mu m. And (4) according to the designed laying direction, laying the aluminum alloy sheet and the lower layer material together.

b) Prepreg layup

And starting a high-power push-pull type ultrasonic generation controller during the laying pressurization process, wherein the frequency is 20kHz, and the amplitude is 40 mu m. Simultaneously keeping the pressure applied by the pressure head at 0.1 MPa; and (4) according to the designed laying direction, laying the aluminum alloy sheet and the lower layer material together.

And (3) alternately laying the aluminum alloy sheets and the GF/PPS composite prepreg according to the designed laying sequence of 2/1 laying or 3/2 laying.

3) And (4) after the laying is finished, taking out the fiber metal laminate after the fiber metal plate is cooled to room temperature.

Example 2

Example 2 is different from example 1 in that the glass fiber reinforced polyphenylene sulfide resin layer is a laminate of alternately arranged glass fibers and a polyphenylene sulfide film. When the laminated plate is prepared, the aluminum alloy thin plate, the glass fiber and the thermoplastic resin (polyphenylene sulfide) film are alternately laminated and laid. In the step 2, adding a thermoplastic resin film laying process: the pressure applied by a pressure head is kept to be 0.1MPa in the laying process; starting a high-power push-pull type ultrasonic wave generation controller, wherein the frequency is 20kHz, the amplitude is 40 mu m, and the thermoplastic resin film and the lower layer material are laid together according to the designed laying direction.

Meanwhile, the pressure applied when the metal layer is laid is 1MPa, so that the polyphenylene sulfide resin can fully infiltrate the glass fiber. The other processes and process conditions were the same as in example 1.

The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.