A processing technique for high temperature ultra-thin films

Abstract

The application provides a high-temperature ultra-thin film processing technology, and a high-temperature ultra-thin film product is prepared from an ultra-thin film layer and a support layer; the ultra-thin film layer is made of high-temperature polypropylene material; the support layer is made of high-strength fabric, is aramid material, and is selected from polypropylene material; the support layer is dissolved at high temperature by using a heating furnace; the temperature of the heating furnace is 167 DEG C; the ultra-thin film is prepared from polypropylene and aramid powder as raw materials; the polypropylene is converted into the ultra-thin film through the steps of dissolving, mixing, casting, stretching processing, drying and trimming and winding under specific conditions; when the surface thickness of the polypropylene material is 0.3-0.7 mu m, the stretching is stopped; the thickness of the ultra-thin film is only 0.45 mu m; the ultra-thin film has high flexibility and bending strength; the ultra-thin film is made of high-molecular material; and the ultra-thin film has high thermal conductivity similar to that of metal.

Description

TECHNICAL FIELD

[0001] The present application relates to the plating technology field of metal materials, in particular, the present application relates to the technical field of high-temperature ultra-thin film processing technology. BACKGROUND

[0002] With the continuous development of science and technology, the research work in the field of material science is also more and more in-depth, among them, the ultra-thin film as a new type of functional material, has many excellent performance, such as high stability, ultra-low dielectric constant and excellent dielectric performance, ultra-thin film like a thinner kitchen plastic wrap, has excellent semiconductor electronic function and unusual stretch, can naturally adapt to the soft biological tissue with high conformal interface;

[0003] In work, high-temperature ultra-thin film can operate stably in high-temperature environment, can be applied to various high-temperature occasions, because high-strength material and ultra-thin film layer are adopted, the product has the characteristics of ultra-thin flexibility, can be freely bent and folded in narrow space, at the same time, because high-temperature material is used to make ultra-thin film layer, the product has excellent high-temperature resistance, can be used safely for a long time;

[0004] There are many processing technologies of high-temperature ultra-thin film in the prior art, such as patent No. CN201610794426.8, patent name for a kind of high-temperature superconducting thin film preparation method, metal oxide substrate is fixed on the workpiece table that can be heated;First, rough pumping vacuum is used, then fine pumping vacuum is used, so that the vacuum degree of vacuum chamber reaches and always keeps at 6.7×10-5Pa;Kr+ plasma is formed into high-energy high-speed Kr+ ion beam by being introduced, bunched, accelerated and neutralized, at the same time, the target table is driven by stepping motor to periodically switch the three kinds of superconducting target materials, so that the Kr+ ion beam is bombarded on the three kinds of superconducting target materials for different lengths of time, the atoms sputtered from the three kinds of superconducting target materials are sequentially deposited on the metal oxide substrate fixed on the workpiece table to form a multilayer metal oxide film with different thicknesses;The formed multilayer metal oxide film is heat treated to diffuse and oxidize between layers, forming the final high-temperature superconducting thin film;

[0005] It can be known from the combination of the comparison file and the prior art that the existing high-temperature ultra-thin film is stretched by a plurality of materials, when the number of raw materials is large, the other properties of the ultra-thin film are improved, at the same time, the high-temperature resistance of the stretched ultra-thin film is poor, and the processing steps of the high-temperature ultra-thin film are too complicated, which is not conducive to mass production and rapid processing. SUMMARY

[0006] In view of the current technical status of ultra-thin film at home and abroad, the present application aims to provide a processing technology of high-temperature ultra-thin film, which specifically adopts the following steps:

[0007] (1) Dissolution: Polypropylene material is selected and dissolved at high temperature in a heating furnace at a temperature of 160-170℃ to produce high molecular weight polypropylene material.

[0008] (2) Mixing: After the polypropylene material is heated and melted to form a high molecular weight polypropylene substance, the high molecular weight polypropylene material is poured into the heated stirring tank. The temperature of the heated stirring tank is 160-170℃. Then, aramid powder is added into the heated stirring tank and stirred for 20-40 minutes.

[0009] (3) Casting: The mixed polymer polypropylene material is forced through a sheet-like die under pressure and extruded into a sheet shape under external force. The cast sheet is then stretched longitudinally and laterally according to the process ratio.

[0010] (4) Stretching process: During the casting process, the polymer polypropylene material in step (3) is heated a second time at a temperature of 120-130℃. The polymer polypropylene material is stretched to form an ultra-thin film by temperature change. When the surface thickness of the polymer polypropylene material is 0.3-0.7μm, the stretching is stopped.

[0011] (5) Drying: The prepared ultrathin film is dried in a dryer at a temperature of 50-60℃ for 2-5 hours to achieve a certain hardness and strength.

[0012] (6) Trimming and winding: Trimming the edges of the prepared ultrathin film to make its edges neat and smooth, and winding the trimmed ultrathin film for use in the next process.

[0013] Preferably, the high-temperature ultrathin film product consists of an ultrathin film layer and a support layer, wherein the ultrathin film layer is made of high-temperature polypropylene material.

[0014] Preferably, in high-temperature ultrathin film products, the support layer is made of high-strength fabric, which is aramid material.

[0015] Preferably, polypropylene material is selected and melted at high temperature in a heating furnace at 167°C to produce a high-molecular-weight polypropylene substance.

[0016] Preferably, after the polypropylene material is heated and melted to form a high molecular weight polypropylene substance, the high molecular weight polypropylene material is poured into a heated stirring tank at a temperature of 164°C. Then, aramid powder is added to the heated stirring tank and stirred for 23 minutes.

[0017] Preferably, during the casting process, the polymer polypropylene material is heated a second time to a temperature of 127°C. The temperature change causes the polymer polypropylene material to stretch into an ultra-thin film. The stretching is stopped when the surface thickness of the polymer polypropylene material reaches 0.45 μm.

[0018] Preferably, the prepared ultrathin film is dried inside a dryer at a temperature of 54°C for 3.5 hours to achieve a certain hardness and strength.

[0019] By implementing the specific contents of this invention, the following effects can be achieved:

[0020] This invention's ultrathin film uses polypropylene and aramid powder as raw materials. Under specific conditions, it undergoes high-temperature processing, involving dissolution, mixing, casting, stretching, drying, trimming, and winding steps to transform polypropylene into an ultrathin film. Stretching is stopped when the surface thickness of the polymer polypropylene reaches 0.3-0.7 μm, resulting in an ultrathin film thickness of only 0.45 μm. This film exhibits extremely high flexibility and flexural strength. Made from polymer materials, it possesses high thermal conductivity similar to metals and exhibits good heat resistance, high strength, and stable physical and chemical properties at high temperatures.

[0021] By mixing polypropylene and aramid powders, the ultrafilm can achieve high strength due to the high strength of the aramid powder, which is a high-strength fabric material. Furthermore, by controlling the stretching process after mixing, the ultrafilm can achieve high temperature resistance and high transparency, making it widely applicable in various fields. This method provides a simple, easy, economical and practical preparation method that can meet the needs of large-scale production. Detailed Implementation

[0022] The present invention will now be illustrated with examples, but the present invention is not limited to the examples described below.

[0023] The raw materials and reagents used in this invention: polypropylene and aramid powder are both common raw materials on the market.

[0024] The instruments used in this invention are: a heating furnace (Shanghai Jujing Precision Instrument Manufacturing Co., Ltd.), a heating and stirring tank (Yancheng Hailian Machinery Equipment Co., Ltd.), and a dryer (Fengyou Machinery (Shanghai) Co., Ltd.).

[0025] In addition, unless otherwise specified, % in the following description refers to m / m mass percentage. All reagents, raw materials and instruments used in this invention are well known in the art and can be purchased from the market, but this does not limit the implementation of this invention. Other reagents and equipment well known in the art can also be applied to the implementation of the following embodiments of this invention. Example

[0026] This embodiment provides a processing technology for a high-temperature ultrathin film. According to the formula percentage, the processing technology for the high-temperature ultrathin film includes 120-140 parts of polypropylene and 30-45 parts of aramid powder.

[0027] Preferably, the high-temperature ultrathin film processing technology, by percentage of formulation, includes 136 parts polypropylene and 39 parts aramid. Example

[0028] This embodiment provides a high-temperature ultrathin film processing technology, and the specific steps are as follows:

[0029] (1) Dissolution: Polypropylene material is selected and dissolved at high temperature in a heating furnace at a temperature of 160-170℃ to produce high molecular weight polypropylene material.

[0030] (2) Mixing: After the polypropylene material is heated and melted to form a high molecular weight polypropylene substance, the high molecular weight polypropylene material is poured into the heated stirring tank. The temperature of the heated stirring tank is 160-170℃. Then, aramid powder is added into the heated stirring tank and stirred for 20-40 minutes.

[0031] (3) Casting: The mixed polymer polypropylene material is forced through a sheet-like die under pressure and extruded into a sheet shape under external force. The cast sheet is then stretched longitudinally and laterally according to the process ratio.

[0032] (4) Stretching process: During the casting process, the polymer polypropylene material in step (3) is heated a second time at a temperature of 120-130℃. The polymer polypropylene material is stretched to form an ultra-thin film by temperature change. When the surface thickness of the polymer polypropylene material is 0.3-0.7μm, the stretching is stopped.

[0033] (5) Drying: The prepared ultrathin film is dried in a dryer at a temperature of 50-60℃ for 2-5 hours to achieve a certain hardness and strength.

[0034] (6) Trimming and winding: Trimming the edges of the prepared ultrathin film to make its edges neat and smooth, and winding the trimmed ultrathin film for use in the next process;

[0035] Preferably, the high-temperature ultrathin film product consists of an ultrathin film layer and a support layer, wherein the ultrathin film layer is made of high-temperature polypropylene material;

[0036] Preferably, in high-temperature ultrathin film products, the support layer is made of high-strength fabric, which is aramid material;

[0037] Preferably, polypropylene material is selected and melted at high temperature in a heating furnace at 167°C to produce a high-molecular-weight polypropylene substance.

[0038] Preferably, after the polypropylene material is heated and melted to form a high molecular weight polypropylene substance, the high molecular weight polypropylene material is poured into a heated stirring tank at a temperature of 164°C. Then, aramid powder is added to the heated stirring tank and stirred for 23 minutes.

[0039] Preferably, during the casting process, the polymer polypropylene material is heated a second time to a temperature of 127°C. The temperature change causes the polymer polypropylene material to stretch into an ultra-thin film. The stretching is stopped when the surface thickness of the polymer polypropylene material is 0.45 μm.

[0040] Preferably, the prepared ultrathin film is dried inside a dryer at a temperature of 54°C for 3.5 hours to achieve a certain hardness and strength. Example

[0041] First, polypropylene material is selected and melted at high temperature in a heating furnace (160-170℃) to form a high-molecular-weight polypropylene substance. After melting, the high-molecular-weight polypropylene substance is poured into a heated mixing tank (160-170℃). Aramid powder is then added to the tank and stirred for 20-40 minutes. The mixed high-molecular-weight polypropylene substance is then forced through a sheet-like die under pressure and extruded into sheets under external force for casting. The cast sheets are then processed according to the process ratio. For example, longitudinal and transverse stretching is performed. During the casting process, the polymer polypropylene material is heated twice at a temperature of 120-130℃. The temperature change causes the polymer polypropylene material to be stretched into an ultrathin film. When the surface thickness of the polymer polypropylene material is 0.3-0.7μm, the stretching is stopped, and the prepared ultrathin film is dried in a dryer at a temperature of 50-60℃ for 2-5 hours to achieve a certain hardness and strength. The prepared ultrathin film is then trimmed to make its edges neat and smooth. The trimmed ultrathin film is then wound up for use in the next process. Example

[0042] The high-temperature ultrathin film product consists of an ultrathin film layer and a support layer. The ultrathin film layer is made of high-temperature polypropylene material, while the support layer is made of high-strength aramid fabric. The polypropylene material is melted at high temperature in a furnace at 167℃ to form a high-molecular-weight polypropylene substance. After melting, the polypropylene material is poured into a heated stirring tank at 164℃. Aramid powder is then added to the tank and stirred for 23 minutes. During the casting process, the polypropylene material is heated a second time to 127℃. This temperature change stretches the polypropylene material to form an ultrathin film. Stretching is stopped when the surface thickness of the polypropylene material reaches 0.45μm. The prepared ultrathin film is then dried in a dryer at 54℃ for 3.5 hours to achieve a certain level of hardness and strength. Example

[0043] The ultrathin film uses polypropylene and aramid powder as raw materials. Under specific conditions, it undergoes high-temperature processing. Through steps such as dissolution, mixing, casting, stretching, drying, and trimming and winding, polypropylene is transformed into an ultrathin film. Stretching is stopped when the surface thickness of the polymer polypropylene material reaches 0.3-0.7 μm, resulting in an ultrathin film thickness of only 0.45 μm. It possesses extremely high flexibility and flexural strength. Made of polymer materials, it exhibits high thermal conductivity similar to metals and demonstrates good heat resistance, high strength, and stable physical and chemical properties at high temperatures.

[0044] By mixing polypropylene and aramid powders, the ultrafilm can achieve high strength due to the high strength of the aramid powder, which is a high-strength fabric material. Furthermore, by controlling the stretching process after mixing, the ultrafilm can achieve high temperature resistance and high transparency, making it widely applicable in various fields. This method provides a simple, easy, economical and practical preparation method that can meet the needs of large-scale production.

[0045] As described above, the present invention is well implemented. The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various changes and improvements to the technical solutions of the present invention made by those skilled in the art without departing from the spirit of the present invention are all acceptable.

[0046] It should fall within the protection scope defined by this invention.

Claims

1. A processing technology for high-temperature ultrathin films, characterized in that: Includes an ultrathin film layer and a support layer; The specific steps are as follows: (1) Dissolution: Polypropylene material is selected and dissolved at high temperature in a heating furnace at a temperature of 160-170℃ to produce high molecular weight polypropylene material. (2) Mixing: After the polypropylene material is heated and melted to form a high molecular weight polypropylene substance, the high molecular weight polypropylene material is poured into the heated stirring tank. The temperature of the heated stirring tank is 160-170℃. Then, aramid powder is added into the heated stirring tank and stirred for 20-40 minutes. (3) Casting: The mixed polymer polypropylene material is forced through a sheet-like die under pressure and extruded into a sheet shape under external force. The cast sheet is then stretched longitudinally and laterally according to the process ratio. (4) Stretching process: During the casting process, the polymer polypropylene material in step (3) is heated a second time at a temperature of 120-130℃. The polymer polypropylene material is stretched to form an ultra-thin film by temperature change. When the surface thickness of the polymer polypropylene material is 0.3-0.7μm, the stretching is stopped. (5) Drying: The prepared ultrathin film is dried in a dryer at a temperature of 50-60℃ for 2-5 hours to achieve a certain hardness and strength. (6) Trimming and winding: Trimming the edges of the prepared ultrathin film to make its edges neat and smooth, and winding the trimmed ultrathin film for use in the next process.

2. The processing technology for a high-temperature ultrathin film according to claim 1, characterized in that: The ultrathin film layer is made of high-temperature polypropylene material.

3. The processing technology for a high-temperature ultrathin film according to claim 1, characterized in that: The support layer is made of high-strength fabric, specifically aramid material.

4. The processing technology for a high-temperature ultrathin film according to claim 1, characterized in that: The selected polypropylene material is melted at high temperature in a heating furnace at 167°C to produce a high-molecular-weight polypropylene substance.

5. The processing technology for a high-temperature ultrathin film according to claim 1, characterized in that: After the polypropylene material is heated and melted to form a high molecular weight polypropylene substance, the high molecular weight polypropylene material is poured into a heated stirring tank at a temperature of 164°C. Then, aramid powder is added to the heated stirring tank and stirred for 23 minutes.

6. The processing technology for a high-temperature ultrathin film according to claim 1, characterized in that: During the casting process, the polymer polypropylene material is heated a second time to a temperature of 127°C. The temperature change causes the polymer polypropylene material to stretch into an ultra-thin film. The stretching is stopped when the surface thickness of the polymer polypropylene material reaches 0.45 μm.

7. The processing technology for a high-temperature ultrathin film according to claim 1, characterized in that: The prepared ultrathin film is dried inside a dryer at a temperature of 54°C for 3.5 hours to achieve a certain level of hardness and strength.