Performance improvement of nanographene in polyester hot melt wire

1. Performance improvement of nanographene in polyester hot melt wire

1.1 Enhanced mechanical properties
The addition of nanographene can significantly improve the mechanical properties of polyester hot melt wire. In practical applications, the tensile strength of polyester hot melt wire with nanographene added is about 30% higher than that of ordinary polyester hot melt wire. This is because nanographene has excellent mechanical properties, and its lamellar structure can form a reinforced network in the hot melt wire. When subjected to external force, it can effectively disperse stress and prevent crack expansion, thereby improving the tensile strength and toughness of the hot melt wire. For example, in the production of some high-end textiles, the use of this enhanced polyester hot melt wire can make the fabric more durable and extend the service life of the product.
1.2 Improved thermal stability
Nanographene also has a significant effect on improving the thermal stability of polyester hot melt wire. Experimental data show that the thermal decomposition temperature of polyester hot melt wire with nanographene added is about 20℃ higher than that of ordinary hot melt wire. This is because nanographene has good thermal conductivity and thermal stability, and can form a heat-insulating protective layer in the hot melt to slow down the transfer of heat. At the same time, it can maintain a stable structure at high temperatures and will not decompose rapidly at high temperatures like ordinary hot melts. In practical applications, this polyester hot melt with improved thermal stability can better adapt to high-temperature processing environments. For example, in the production process of hot melt adhesives, it can ensure that the hot melt does not deform or decompose at high temperatures, thereby improving the quality and stability of the product.

2. Preparation method of nanographene-modified polyester hot melt

2.1 Melt blending method

Melt blending method is a common method for preparing nanographene-modified polyester hot melt, which has the advantages of simple process and low cost.

Process flow: First, nanographene and polyester chips are mixed in a certain proportion. Usually, the amount of nanographene added is between 0.5% and 5% (mass fraction), and they are fully mixed by a high-speed mixer. Then the mixed materials are added to the twin-screw extruder, and melt blended and extruded under a certain temperature and shear force. The extruded materials are cooled, pelletized and other processes to obtain modified polyester particles. Finally, the modified particles are spun to obtain nanographene-modified polyester hot melt wires.
Advantages: This method can make nanographene evenly dispersed in the polyester matrix, so as to give full play to its modification effect. For example, it was found in the experiment that the polyester hot melt wire prepared by melt blending has good nanographene dispersion, and performance indicators such as mechanical properties and thermal stability are significantly improved. Moreover, the production equipment of this method is relatively simple, suitable for large-scale industrial production, and can effectively reduce production costs.
Actual application case: A textile company successfully prepared nanographene-modified polyester hot melt wire by melt blending, and applied it to the production of high-end outdoor sportswear fabrics. Because the hot melt wire has excellent mechanical properties and thermal stability, the fabric can still maintain good performance under high-intensity use and high temperature environment, and the product has been highly recognized by the market.
2.2 In-situ polymerization method
In-situ polymerization method is another important method for preparing nanographene modified polyester hot melt wire. This method realizes in-situ compounding of nanographene with polyester by introducing nanographene during the polymerization process.
Process flow: First, disperse nanographene in the reaction system of terephthalic acid and ethylene glycol, and evenly disperse nanographene by ultrasonic dispersion, stirring and other means. Then, esterification reaction and polycondensation reaction are carried out at a certain temperature and pressure to gradually polymerize terephthalic acid and ethylene glycol to form polyester. At the same time, nanographene is coated in the polyester matrix during the polymerization process to form nanographene modified polyester. Finally, the modified polyester is spun to obtain nanographene modified polyester hot melt wire.
Advantages: The in-situ polymerization method can achieve a close combination of nanographene and polyester during the polymerization process, so that nanographene can better play a reinforcing role. Experiments show that the polyester hot melt prepared by in-situ polymerization has good interfacial compatibility between nanographene and polyester, and its performance indicators such as mechanical properties and thermal stability are further improved. For example, compared with the hot melt prepared by melt blending, its tensile strength can be increased by 5% – 10%, and the thermal decomposition temperature can be increased by about 5℃ – 10℃.
Actual application case: A well-known textile material research and development company developed a high-performance nanographene-modified polyester hot melt using in-situ polymerization and applied it to the production of high-end automotive interior materials. Due to the excellent performance of the hot melt, the automotive interior materials have excellent performance in durability and high temperature resistance, meeting the strict requirements of automobile manufacturers for interior materials, thus occupying a certain share in the automotive interior materials market.

3. Application fields of nanographene-modified polyester hot melt

3.1 Textile and clothing field
Nanographene-modified polyester hot melt has broad application prospects in the field of textiles and clothing, and can significantly improve the performance and quality of textiles.
High-end sportswear: In the production of high-end outdoor sportswear fabrics, the use of nano-graphene modified polyester hot melt wire can make the fabric more durable. For example, a brand of mountaineering clothing uses this hot melt wire, and its tensile strength is about 30% higher than that of ordinary products. It can still maintain good performance under high-intensity use conditions, and the product life is extended by about 20%-30%. It is favored by outdoor sports enthusiasts and its market share is gradually increasing.
Fashion clothing fabrics: In the field of fashion clothing fabrics, the application of nano-graphene modified polyester hot melt wire has also achieved good results. Due to its excellent thermal stability, the fabric is not easy to deform or damage during high-temperature printing and dyeing, ensuring the dimensional stability and color brightness of the fabric. A well-known clothing brand uses this hot melt wire to produce fashion clothing, and its fabric quality has been significantly improved, and the product defective rate has been reduced by 15%-20%, which has improved the company’s economic benefits and brand image.
3.2 Industrial filter materials
Nano-graphene modified polyester hot melt wire also has important application value in the field of industrial filter materials, which can meet the filtering needs of different industrial scenarios.
Air filter material: In the field of air purification, air filter materials made of nanographene-modified polyester hot melt wire have high filtration performance. Its unique structure can effectively intercept tiny particles in the air, such as PM2.5, and the filtration efficiency can reach more than 95%. An air purifier manufacturer uses the filter material produced by this hot melt wire, and its product sales in the market have increased by 30%-40%, providing a strong guarantee for improving indoor air quality.
Liquid filter material: In terms of liquid filtration, such as industrial wastewater treatment, food and beverage filtration, nanographene-modified polyester hot melt wire also performs well. Its good mechanical properties and thermal stability enable it to withstand higher filtration pressure and temperature while maintaining a stable filtration effect. A food and beverage manufacturer uses the filter material made of this hot melt wire, and its filtration efficiency has increased by 25%-30%, and the product quality has been further improved, meeting strict food safety standards.

4. Market prospects and challenges of nanographene modified polyester hot melt wire
4.1 Market demand growth
With the continuous advancement of science and technology and the increasing demand for high-performance materials, the market demand for nanographene modified polyester hot melt wire has shown a rapid growth trend.
Upgrading needs of the textile and clothing industry: In the field of textiles and clothing, consumers have higher and higher requirements for the quality, durability and functionality of clothing. Nanographene modified polyester hot melt wire can significantly improve the mechanical properties and thermal stability of textiles, meeting the needs of high-end sportswear and fashion clothing fabrics. For example, the high-end outdoor sportswear market is growing at a rate of 15%-20% per year, and the demand for high-performance hot melt wire has also increased accordingly. According to market research institutions, in the next five years, the global high-end sportswear fabric market will reach US$50 billion, of which the application of nanographene modified polyester hot melt wire is expected to reach 30%-40%.
Expansion of the industrial filter material market: In the field of industrial filter materials, with the improvement of environmental protection requirements and the expansion of industrial production scale, the demand for efficient and stable filter materials is also increasing. The excellent performance of nanographene-modified polyester hot melt wire in air filtration and liquid filtration materials has enabled it to continuously expand its market share in this field. Taking the air purifier market as an example, in recent years, the global air purifier market size has grown by about 25% each year, and the filtration materials using nanographene-modified polyester hot melt wire have accounted for 20%-30% of the market, and are showing an increasing trend year by year. In the fields of industrial wastewater treatment and food and beverage filtration, the application of this material has also been gradually promoted. It is expected that in the next 3-5 years, its share in the industrial filtration material market will reach 10%-15%.
4.2 Technical bottlenecks to be broken through
Although nanographene-modified polyester hot melt wire has broad application prospects, it still faces some technical bottlenecks in the actual production and application process, which need further breakthroughs.
The dispersion problem of nanographene: The uniform dispersion of nanographene in the polyester matrix is ​​one of the key factors affecting the modification effect. At present, although preparation methods such as melt blending and in-situ polymerization can achieve the dispersion of nanographene to a certain extent, there are still problems such as uneven dispersion and agglomeration in large-scale industrial production. For example, during the melt blending process, nanographene is prone to agglomeration under high temperature and shear force, resulting in poor dispersibility in the polyester matrix, affecting the performance of the hot melt. Studies have shown that for every 10% increase in the degree of agglomeration of nanographene, the tensile strength of the hot melt will decrease by about 5% – 8%. Therefore, the development of more efficient nanographene dispersion technology, such as new surface modification methods and optimization of dispersants, is an urgent problem to be solved.
Cost control and cost-effectiveness improvement: The preparation cost of nanographene is relatively high, which to a certain extent limits its wide application in polyester hot melt. At present, the price of nanographene is about 5-10 times that of ordinary polyester chips, resulting in a significant increase in the production cost of nanographene-modified polyester hot melt. Although it has excellent performance, its cost-effectiveness is not obvious in some cost-sensitive application fields, such as the low-end textile market. In order to improve the market competitiveness of nanographene-modified polyester hot melt wire, it is necessary to reduce the preparation cost of nanographene through technological innovation and process optimization, and further improve its modification effect and enhance the cost-effectiveness of the product. For example, by improving the production process of nanographene, improving its production efficiency and reducing raw material consumption, it is expected to reduce the cost of nanographene by 30% – 50%, so that it can be used in a wider market.
Long-term stability needs to be verified: In practical applications, the long-term stability of nanographene-modified polyester hot melt wire is an important consideration. Although experimental data show that it has significant advantages in mechanical properties and thermal stability, whether its performance will decline over time during long-term use, especially under complex environmental conditions, still needs further verification. For example, in outdoor environments, hot melt wires are affected by ultraviolet radiation, temperature changes, humidity and other factors, which may cause the interface performance between nanographene and polyester matrix to decline, thereby affecting the overall performance of hot melt wires. Therefore, it is necessary to carry out long-term outdoor exposure tests and accelerated aging tests to comprehensively evaluate the long-term stability of nanographene-modified polyester hot melt wires, and further optimize the material formula and preparation process based on the test results to ensure its reliability and durability in practical applications.

5. Summary
Nanographene-modified polyester hot melt wires have shown broad application prospects in many fields due to their significant performance improvement. In the field of textiles and clothing, it can significantly enhance the mechanical properties and thermal stability of fabrics, and meet the high-quality requirements of high-end sportswear and fashion clothing fabrics. For example, after a certain brand of mountaineering clothing uses this hot melt wire, the tensile strength is increased by about 30%, the service life is extended by 20%-30%, and the product market share is gradually increasing; in the field of industrial filter materials, its efficient filtering performance and good stability make it widely used in air filtration and liquid filtration materials. A certain air purifier manufacturer uses the filter material produced by this hot melt wire, and the product sales have increased by 30%-40%, providing strong support for the development of related industries.
However, the development of nanographene-modified polyester hot melt wires still faces some challenges. The dispersion problem of nanographene in polyester matrix needs to be further solved. The current preparation method still has problems such as uneven dispersion and agglomeration in large-scale industrial production, which will affect the performance of thermal fuse. Its preparation cost is high, which limits its application in some cost-sensitive fields. It is necessary to reduce costs and improve cost performance through technological innovation and process optimization. In addition, its long-term stability needs to be further verified through long-term outdoor exposure tests and accelerated aging tests to ensure reliability and durability in practical applications. Nevertheless, with the continuous advancement of technology and the growth of market demand, nanographene-modified polyester thermal fuse is expected to be more widely used in the future, providing better quality and more efficient material solutions for the development of textiles, clothing, industrial filtration and other fields.