1. The high-performance instant aluminum sheet is characterized by comprising an aluminum sheet and a PEO film arranged on the surface of the aluminum sheet; the PEO film comprises the following components in parts by weight: 20-40 parts of polyethylene glycol, 10-20 parts of high-molecular polyethylene oxide, 1-6 parts of accelerator and 0.5-2 parts of dispersant.

2. The high-performance instant aluminum flake according to claim 1, wherein the accelerator is an inorganic salt-based solubilizer or a hydrophilic anionic surfactant.

3. The high performance instant aluminum flake according to claim 1 wherein the dispersant is fumed silica.

4. The high performance instant aluminium sheet according to claim 1, wherein the thickness of the aluminium sheet is 0.12-0.15 mm.

5. The high performance instant aluminum flake of claim 1 wherein the thickness of the PEO film is 50 μm.

6. The high performance instant aluminum flake of claim 1 wherein the PEO film has a hardness of 1B or less.

7. A process for the preparation of high performance instant aluminium flakes according to any one of claims 1 to 6, comprising:

uniformly mixing 20-40 parts by weight of polyethylene glycol, 10-20 parts by weight of high-molecular polyethylene oxide, 1-6 parts by weight of accelerator, 10-20 parts by weight of diluent and 0.5-2 parts by weight of dispersant to prepare a PEO coating;

coating the PEO coating on the surface of the aluminum sheet;

and baking the aluminum sheet coated with the PEO coating to enable the PEO coating to form the PEO film on the surface of the aluminum sheet, so as to prepare the high-performance instant aluminum sheet.

8. The method of manufacturing of claim 7, wherein the step of applying the PEO coating to the surface of the aluminum sheet comprises:

the PEO coating was coated on the surface of the aluminum sheet by a roll coater at a roll coating speed of 18-30 m/min.

9. The method of manufacturing according to claim 7, wherein the step of subjecting the aluminum sheet coated with the PEO coating to a baking process comprises:

and (3) baking the aluminum sheet coated with the PEO coating at the temperature of 100-150 ℃, wherein the baking time is set to be 2-5 min.

10. Use of a high performance instant aluminium flake according to any of claims 1 to 6, comprising: and using the high-performance instant aluminum sheet for drilling of the PCB.

Background

A cover plate (short for cover plate) for drilling a Printed Circuit Board (PCB) is an auxiliary material which is placed on the surface of a PCB to be processed when the PCB is mechanically drilled so as to meet the requirements of a processing process. Because a large number of cover plates are required in the mechanical drilling processing production of the PCB, and along with the rapid development of the PCB drilling technology in recent years, the cover plate industry becomes an important component with a considerable scale in the PCB raw and auxiliary material industry.

Depending on the material, the cover plates are generally classified on the market into the following categories: phenolic paper cover plates (including phenolic paper cover plates and cold punching plates), common aluminum sheets (namely aluminum foil cover plates) and epoxy glass cloth cover plates. The phenolic paper cover plate and the cold punching plate are mainly used for drilling holes in an FPC (Flexible Printed Circuit); the common aluminum sheet is made of alloy aluminum foil and is used for drilling common and fine circuit boards; the epoxy glass fiber cloth cover plate is composed of epoxy resin and glass fiber cloth, and the amount of the epoxy glass fiber cloth cover plate on the market is very small at present.

With continuous forward progress and development of society, the requirement on high precision of electronic products is higher and higher, and the high precision development of electronic products directly puts forward the high precision requirement to circuit board processing, also makes the drilling hole site precision and the downthehole quality requirement on PCB drilling higher and higher simultaneously. Although the positioning of the drill bit can be effectively improved by covering the surface of the PCB with a layer of aluminum sheet, new problems can be caused, (1) because the surface of the aluminum sheet is smooth, the drill bit is easy to slip instantly when drilling, the distance deviation between the processed drilling hole site and the pre-designed hole site is large, the accuracy of the processed drilling hole site is low, and because the drill bit is easy to break when drilling or back drilling because of the instant slipping process; (2) if set up thermosetting resin on the aluminum sheet surface, although can avoid the drill bit to skid to a certain extent, it is attached to the drilling inner wall along with the drill bit during drilling, and is insoluble in water, is difficult for cleaing away, influences PCB's post processing work.

Disclosure of Invention

In view of the problems described, the present application has been made to provide a high-performance instant aluminum sheet and a method of making and using the same that overcome or at least partially solve the problems described above, comprising:

a high-performance instant aluminum sheet comprises an aluminum sheet and a PEO (polyethylene oxide) film arranged on the surface of the aluminum sheet; the PEO film comprises the following components in parts by weight: 20-40 parts of polyethylene glycol, 10-20 parts of high-molecular polyethylene oxide, 1-6 parts of accelerator and 0.5-2 parts of dispersant.

Preferably, the accelerator is an inorganic salt solubilizer or a hydrophilic anionic surfactant.

Preferably, the dispersant is fumed silica.

Preferably, the thickness of the aluminum sheet is 0.12-0.15 mm.

Preferably, the thickness of the PEO film is 50 μm.

Preferably, the PEO film has a hardness of 1B or less.

A preparation method of the high-performance instant aluminum sheet comprises the following steps:

uniformly mixing 20-40 parts by weight of polyethylene glycol, 10-20 parts by weight of high-molecular polyethylene oxide, 1-6 parts by weight of accelerator, 10-20 parts by weight of diluent and 0.5-2 parts by weight of dispersant to prepare a PEO coating;

coating the PEO coating on the surface of the aluminum sheet;

and baking the aluminum sheet coated with the PEO coating to enable the PEO coating to form the PEO film on the surface of the aluminum sheet, so as to prepare the high-performance instant aluminum sheet.

Preferably, the step of coating the PEO coating on the surface of the aluminum sheet comprises:

the PEO coating was coated on the surface of the aluminum sheet by a roll coater at a roll coating speed of 18-30 m/min.

Preferably, the step of subjecting the aluminum sheet coated with the PEO coating to a baking process comprises:

and (3) baking the aluminum sheet coated with the PEO coating at the temperature of 100-150 ℃, wherein the baking time is set to be 2-5 min.

Use of a high performance instant aluminium flake as defined above, comprising: and using the high-performance instant aluminum sheet for drilling of the PCB.

The application has the following advantages:

in the examples of the present application, a PEO film was formed by passing an aluminum sheet and disposing a surface of the aluminum sheet; the PEO film comprises the following components in parts by weight: 20-40 parts of polyethylene glycol, 10-20 parts of high-molecular polyethylene oxide, 1-6 parts of accelerator and 0.5-2 parts of dispersant, wherein when the high-performance instant aluminum sheet is applied to drilling of a PCB, the PEO film can play double roles of fixing the position of a drill bit and reducing the temperature of the drill bit; in addition, the PEO film has better water solubility, and slag chips remained in holes of the PCB during drilling are easily washed and removed by water, so that the problems of high wire winding, hole plugging and pin breaking rate, pollution of glue slag on hole walls and the like during drilling are effectively solved.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the present application will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a high-performance instant aluminum sheet provided by an embodiment of the present application;

fig. 2 is a flow chart illustrating the steps of a method for preparing high-performance instant aluminum flakes according to an embodiment of the present application;

fig. 3 is a flowchart of steps of an application of a high-performance instant aluminum flake according to an embodiment of the present application.

The reference numbers in the drawings of the specification are as follows:

1. aluminum sheets; 2. a PEO membrane.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, a high-performance instant aluminum sheet provided by an embodiment of the present application is shown, which comprises an aluminum sheet 1 and a PEO film 2 disposed on the surface of the aluminum sheet 1; the PEO membrane 2 comprises the following components in parts by weight: 20-40 parts of polyethylene glycol, 10-20 parts of high-molecular polyethylene oxide, 1-6 parts of accelerator and 0.5-2 parts of dispersant.

The PEO film 2 is formed by mixing the polyethylene glycol, the high-molecular polyethylene oxide, the accelerator, the dispersant and the diluent and then drying at a proper temperature, and the hardness of the PEO film 2 is less than or equal to 1B (Mitsubishi hardness pencil test method).

In the examples of the present application, a PEO film 2 was formed by passing an aluminum sheet 1 and disposing a PEO film on the surface of the aluminum sheet 1; the PEO membrane 2 comprises the following components in parts by weight: 20-40 parts of polyethylene glycol, 10-20 parts of high-molecular polyethylene oxide, 1-6 parts of accelerator and 0.5-2 parts of dispersant, wherein when the high-performance instant aluminum sheet is applied to drilling of a PCB, the PEO film 2 can play double roles of fixing the position of a drill bit and reducing the temperature of the drill bit; in addition, the PEO film 2 has better water solubility, and slag chips remained in holes of the PCB board during drilling are easily washed and removed by water, so that the problems of high wire winding, hole plugging and pin breaking rate, pollution of glue slag on hole walls and the like during drilling are effectively solved.

Next, a high-performance instant aluminum sheet in the present exemplary embodiment will be further described.

In this embodiment, the accelerator is an inorganic salt solubilizer or a hydrophilic anionic surfactant. Specifically, the accelerator is one or a combination of more of urea, ammonium sulfate, carboxylate, sulfonate, sulfate and phosphate; the promoter can increase the solubility of the high-molecular polyethylene oxide and improve the process performance of the high-molecular polyethylene oxide.

In this embodiment, the dispersant is fumed silica. Preferably, the dispersant is fumed silica under the trade name R972; the dispersant can uniformly disperse solid and liquid particles in a system, and can prevent the particles from settling and coagulating to form a stable suspension.

In the present embodiment, the aluminum sheet 1 has a thickness of 0.12 to 0.15mm, preferably 0.13mm and 0.14 mm.

In this example, the thickness of the PEO film 2 is 40-60 μm, preferably 50 μm.

In this example, the PEO film 2 has a hardness of 1B or less, preferably 1B.

Referring to fig. 2, there is shown a method for preparing a high-performance instant aluminum sheet according to any one of the above embodiments, which includes:

s210, uniformly mixing 20-40 parts by weight of polyethylene glycol, 10-20 parts by weight of high-molecular polyethylene oxide, 1-6 parts by weight of accelerator, 10-20 parts by weight of diluent and 0.5-2 parts by weight of dispersant to prepare a PEO coating;

s220, coating the PEO coating on the surface of the aluminum sheet 1;

s230, baking the aluminum sheet 1 coated with the PEO coating to enable the PEO coating to form the PEO film 2 on the surface of the aluminum sheet 1, and thus obtaining the high-performance instant aluminum sheet.

In an embodiment of the present application, the detailed process of "mixing 20 to 40 parts by weight of polyethylene glycol, 10 to 20 parts by weight of high molecular polyethylene oxide, 1 to 6 parts by weight of accelerator, 10 to 20 parts by weight of diluent, and 0.5 to 2 parts by weight of dispersant uniformly to prepare PEO coating" in step S210 can be further described with reference to the following description.

And cleaning the reaction vessel. Specifically, the reaction vessel is washed with ethyl acetate or ethanol.

Adding 20-40 parts by weight of polyethylene glycol, 10-20 parts by weight of high-molecular polyethylene oxide, 1-6 parts by weight of accelerator, 10-20 parts by weight of diluent and 0.5-2 parts by weight of dispersant into the reaction vessel. In particular, the diluent is water or a hydrophilic solution. The diluent is an inactive diluent and is volatilized along with the curing process; the diluent can reduce the viscosity of the high-molecular polyethylene oxide, improve the process performance of the high-molecular polyethylene oxide and facilitate the construction of the PEO coating.

And dispersing the materials at a high speed for 15-20min (the rotating speed is 900-.

In an embodiment of the present application, the specific process of "applying the PEO coating to the surface of the aluminum sheet 1" described in step S220 may be further explained in conjunction with the following description.

And cleaning the roller coater. Specifically, the roll coater was cleaned with a dust-free cloth.

And adjusting the roll coating speed of the roll coating machine. Specifically, the roll coating speed of the roll coating machine is adjusted to 18-30 m/min.

And coating the PEO coating on the surface of the aluminum sheet 1 by using the roller coating machine.

In an embodiment of the present application, the specific process of "baking the aluminum sheet 1 coated with the PEO coating to form the PEO film 2 on the surface of the aluminum sheet 1 to produce the high-performance instant aluminum sheet" in step S230 can be further described with reference to the following description.

And cleaning the baking machine. Specifically, the roaster is cleaned with a dust-free cloth.

And adjusting the baking temperature of the baking machine. Specifically, the baking temperature of the baking machine is adjusted to be 100-150 ℃.

And (3) baking the aluminum sheet 1 coated with the PEO coating by using the baking machine for 2-5min, so that the PEO coating forms the PEO film 2 on the surface of the aluminum sheet 1 to obtain the high-performance instant aluminum sheet.

Referring to fig. 3, in an embodiment of the present application, there is provided a use of the high-performance instant aluminum flake according to any of the above embodiments, including:

s310, using the high-performance instant aluminum sheet for drilling of the PCB.

In an embodiment of the present application, a specific process of "using the high performance instant aluminum sheet for PCB drilling" in step S310 may be further described in conjunction with the following description.

The base plate, the PCB to be drilled and the high-performance instant aluminum sheet are sequentially placed on the machine from bottom to top, so that the aluminum sheet 1 faces the PCB, and the PEO film 2 faces the drill bit. Specifically, the backing plate can be a phenolic paper backing plate, and has the characteristics of high flatness, high temperature resistance, deformation resistance and the like; the drill bit is a UC type drill bit.

And controlling the drill to drill downwards from the upper part of the high-performance instant aluminum sheet. Specifically, the drill is controlled to drill downwards from the upper part of the high-performance instant aluminum sheet at the rotating speed of 100KRMP, the feed speed of 2.7m/min and the withdrawal speed of 22.05 m/min.

And after the drill bit sequentially drills through the high-performance instant aluminum sheet and the PCB and contacts the base plate, controlling the drill bit to stop drilling.

While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The above detailed description is made on the high-performance instant aluminum sheet provided by the present application, and the preparation method and the application thereof, and the principle and the implementation mode of the present application are explained by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.