KR-20260066385-A - Dielectric Heater Composition and Dielectric Heater

Abstract

The present invention relates to a transparent dielectric heater composition and a thermochromic dielectric heater. One embodiment has high performance and high flexibility by adding PC and EC. A dielectric heater composition according to an embodiment of the present invention comprises a polymer resin; a main plasticizer; propylene carbonate (PC) and ethylene carbonate (EC).

Inventors

• 배진우
• 최승은
• 오승주

Assignees

• 한국기술교육대학교 산학협력단

Dates

Publication Date

20260512

Application Date

20241104

Claims (9)

1. Polymer resin; Stock plasticizer; Propylene carbonate (PC) and Containing ethylene carbonate (EC), Oilfield heater composition.
2. In paragraph 1, The combined content ratio of the above polymer resin and the above main plasticizer, propylene carbonate, and ethylene carbonate is 1:5.5 to 1:6.5 based on weight, Oilfield heater composition.
3. In paragraph 1, The combined content ratio of the above main plasticizer, propylene carbonate, and ethylene carbonate is 2.5:1 to 3.5:1 by weight, Oilfield heater composition.
4. In paragraph 1, The content ratio of the above propylene carbonate and ethylene carbonate is 1:8.5 to 1:9.0 based on weight, Oilfield heater composition.
5. In paragraph 1, The content ratio of the polymer resin and the main plasticizer is 1:4 to 1:5 based on weight, Oilfield heater composition.
6. In paragraph 1, The combined content ratio of the above polymer resin, propylene carbonate, and ethylene carbonate is 1:1 to 1:2 based on weight, Oilfield heater composition.
7. A step of preparing a polymer resin solution by dissolving a polymer resin in a solvent; A step of preparing a mixture by mixing a main plasticizer, propylene carbonate, and ethylene carbonate into the above polymer resin solution, and A step comprising drying the above mixture, Method for manufacturing an oil field heater layer.
8. In Paragraph 7, The combined content ratio of the polymer resin, the main plasticizer, propylene carbonate, and ethylene carbonate added in the step of preparing the above mixture is 1:5.5 to 1:6.5 based on weight, Method for manufacturing an oil field heater layer.
9. A dielectric heater comprising the dielectric heater layer of claim 7.

Description

Transparent Dielectric Heater Composition and Transparent Dielectric Heater The present invention relates to a transparent dielectric heater composition and a transparent dielectric heater. One embodiment has high performance and high flexibility by adding PC and EC. The present invention is the result of research conducted with funding from the Ministry of Science and ICT and supported by the National Research Foundation of Korea (RS-2024-00348475). Flexible transparent heaters are a technology that provides high thermal conductivity performance through electrical heat generation while maintaining a thin and flexible structure. These heaters can be used in various fields such as electronic devices, displays, and wearable devices, and their transparent and flexible properties are particularly useful in applications such as displays or touchscreens. Conventional flexible transparent heater technology primarily utilizes materials such as metal nanowires, carbon nanotubes (CNT), and graphene to form transparent electrodes and fabricate heaters based on them. While this approach offers excellent electrical properties, metal nanowires and carbon nanotubes are expensive, have poor transparency, and suffer from performance degradation due to reduced resistance caused by mechanical deformation. In particular, there is a problem in achieving uniform heat distribution. Furthermore, their lack of durability against mechanical deformation can lead to performance degradation during long-term use. In particular, plasticizers used in conventional technology are primarily materials such as DBA (Dioctyl Sebacate). While dielectric layers using these plasticizers are effective in imparting flexibility, their dielectric performance is relatively insufficient. This issue degrades the thermal conductivity of flexible heaters, leading to increased power consumption or limitations in practical applications due to the inability to provide sufficient heat. FIG. 1 is a flowchart of a method for manufacturing a transparent dielectric heater according to an embodiment of the present invention. Figure 2 shows the results of measuring the dielectric constant of the dielectric heater layer. FIG. 3 shows the results of measuring the dielectric constant of a dielectric heater layer of another embodiment. Figure 4 shows the results of the loss factor analysis of the dielectric heater layer. Figure 5 is the result of the stress-strain curve analysis of the dielectric heater layer of another embodiment. Figure 7 shows the results of measuring the transmittance of the dielectric heater layer, gel electrode, etc. Figure 8 is a photograph showing the change in temperature according to the applied voltage and extension of the dielectric heater. Figure 9 is a graph showing the change in temperature over time according to the applied voltage and elongation of the dielectric heater. Hereinafter, preferred embodiments of the present invention are described as follows with reference to the attached drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. A dielectric heater composition according to an embodiment of the present invention comprises a polymer resin; a main plasticizer; propylene carbonate (PC) and ethylene carbonate (EC). The above polymer resin serves as a substrate for the dielectric heater. The polymer resin acts as an electrical insulator, providing stability during the process of converting electrical energy into thermal energy, and imparts flexibility, enabling its use in various application environments. Furthermore, the polymer resin enhances thermal conductivity. Additionally, the polymer resin possesses high heat resistance, ensuring that its physical and chemical properties are maintained even during prolonged use, thereby maintaining the heater's performance stably. The above polymer resin may be polyvinyl chloride (PVC), polyurethane (PU), polysiloxane (silicone resin), polyethylene terephthalate (PET), etc., and preferably may be polyvinyl chloride. The above-mentioned primary plasticizer improves the mechanical properties of the polymer resin and makes the material more flexible, thereby enhancing processability and processability. Preferably, the above-mentioned primary plasticizer may be dibutyl adipate (DBA). The content ratio of the polymer resin and the main plasticizer may be 1:4 to 1:5 based on weight. If the content of the main plasticizer is low, flexibility and mechanical properties decrease, whereas if it is too high, there is a problem of reduced mechanical strength and reduced heat resistance. The above propylene carbonate (PC) and ethylene carbonate (EC) function as auxiliary plasticizers. The above propylene carbonate and ethylene carbonate wo