PBT (Polybutylene Terephthalate) has certain applications in the field of hair straighteners, and its advantages include: - **Good heat resistance**: The enhanced UL temperature index reaches 120°C - 140°C, which can withstand the high temperature generated during the use of the hair straightener and is not prone to deformation. - **Excellent mechanical properties**: High strength, good fatigue resistance, stable size, and low creep. It can maintain stable performance under high-temperature conditions. - **Excellent electrical insulation**: It can maintain stable electrical performance in humid and high-temperature environments. It can ensure electrical safety during use and is an ideal material for manufacturing electronic and electrical parts. - **Good processing fluidity**: It has a fast crystallization speed, is easy to be processed and molded, and has relatively low mold temperature requirements and short cooling time during injection molding, which helps improve production efficiency. - **Good chemical corrosion resistance**: It has certain tolerance to water, oil, acid, alkali, etc. - **Low water absorption rate**: It is only 0.1%, and can still maintain various physical properties (including electrical properties) in a humid environment. However, PBT also has some disadvantages, such as low notch impact strength and large molding shrinkage rate. Therefore, most of them will adopt methods such as glass fiber reinforcement or inorganic filling modification to improve their performance. In terms of future development trends, as people's requirements for the quality and functionality of hair straighteners continue to increase, PBT materials may present the following trends: - **High performance**: Further improve the strength, heat resistance, flame retardancy and other properties of PBT to meet the higher requirements of hair straightener applications. For example, develop PBT materials with higher heat resistance temperatures to adapt to the long-term high-temperature use of hair straighteners; enhance its flame retardancy and improve the safety of use. - **Functional diversification**: Endow PBT materials with more functions, such as better damage prevention and hair care functions. Special additives may be added or modifications may be made to reduce hair damage during the use of hair straighteners and even have the effect of nourishing hair. - **Customization**: Customize PBT materials with specific properties according to the design and functional requirements of different hair straighteners. For example, for some small and portable hair straighteners, develop thinner and higher-strength PBT materials; for professional-grade hair straighteners, pay attention to the stability and durability of the materials. - **Environmental protection**: Develop more environmentally friendly PBT materials to adapt to environmental protection regulations and market demands. This may include reducing the use of harmful substances and improving the recyclability of the materials. - **Composite with other materials**: Obtain materials with more excellent comprehensive performance by combining with other high-performance materials. For example, combine with materials with good thermal conductivity to make the heating of the hair straightener more uniform and rapid; or combine with elastic materials to increase the comfort during the use of the hair straightener. The following are some application examples of PBT materials in the field of hair straighteners: - **Cross-border best-selling 3D image multi-functional styling hair straightener**: This hair straightener is suitable for various hair types and can be used for both straightening and curling. Its heat conductor material is PBT, the product category is a three-in-one for drying, curling and straightening, and the power supply method is wired (alternating current). In addition, the shell process of this hair straightener adopts spraying (including UV paint, rubber paint, metallic paint, piano lacquer, pearlescent powder, etc.), the rated power is 45W, and the rated voltage is 220V. - **Amazon best-selling straightening comb multi-functional negative ion hair straightener**: It has negative ion function and can be used for electric charging and hair care. - **Best-selling straightening comb negative ion non-damaging hair straightener**: It can be used for both straightening and curling, adopts a splint design, and can be used in dormitories or at home. The application of PBT materials in hair straighteners mainly utilizes its good heat resistance, mechanical properties, electrical insulation and processing fluidity. It can withstand the high temperature generated during the use of the hair straightener and is not prone to deformation; it has certain strength and toughness to ensure the durability of the product; good electrical insulation ensures the safety of use; at the same time, it is easy to be processed and molded, which helps improve production efficiency. However, in order to meet the specific needs of hair straighteners, PBT materials may also be modified, such as enhancing its flame retardancy and toughness. In practical applications, different brands and models of hair straighteners may optimize and adjust the performance of PBT materials according to their own design and functional requirements.