What is the mainstream technology for producing BOPP thermal sensitive synthetic paper at present?

The current mainstream technology for producing BOPP thermal sensitive synthetic paper covers multiple aspects, and the following is a specific introduction:

1、 Material formula and production process

Raw material selection: BOPP thermosensitive synthetic paper is mainly made of polypropylene (PP), and the physical properties and chemical stability of the material are improved by optimizing the formula of the polymer material. This enables synthetic paper to maintain its advantages of being lightweight, non-toxic, odorless, and moisture-proof, while also possessing superior mechanical strength, airtightness, and barrier properties.

Bi directional stretching process: BOPP film is prepared using the bi directional stretching process, which involves stretching in two vertical directions (longitudinal and transverse) to rearrange the molecular chains of the film and form a highly oriented structure. This process not only improves the transparency and glossiness of the film, but also significantly enhances its tensile strength, impact strength, and rigidity.

2、 Thermal sensitive coating technology

Coating formula: Apply a thermosensitive coating composed of water-based resin, thermosensitive agent, color developer, and sensitizer on the surface of BOPP substrate. By continuously optimizing the coating formula, the sensitivity, stability, and color vividness of the thermosensitive coating are improved, resulting in clearer and more delicate printed images.

Application of environmentally friendly materials: Emphasis is placed on the application of environmentally friendly materials, such as using water-based resins and other environmentally friendly materials to replace traditional solvent based materials, reducing environmental pollution.

3、 Coating and Printing Technology

Coating technology: Advanced coating techniques such as wet coating, gravure coating, and reverse coating are used to evenly coat the thermosensitive coating on the surface of BOPP substrate. These technologies have advantages such as simple equipment, low processing costs, and suitability for large-scale production, ensuring the quality and stability of coatings.

Printing technology: BOPP color thermal synthetic paper has good printing adaptability and can achieve exquisite appearance effects through color matching printing. With the development of high-precision printing technologies such as digital printing and flexographic printing, synthetic paper is more adept at printing complex patterns and text.

4、 Innovation in production equipment

Intelligent control system: Modern BOPP thermal synthetic paper production lines are equipped with advanced intelligent control systems that can monitor various parameters in real-time during the production process, such as temperature, pressure, speed, etc., and automatically adjust them according to preset process requirements to ensure the stability of the production process and consistency of product quality.

Automated production line: Introducing automated production lines reduces manual intervention, improves production efficiency and product accuracy. The application of technologies such as automatic roll changing, automatic film bonding, and automatic detection makes the production process more efficient and continuous.

Efficient extruder and energy-saving drying system: Adopting a new type of high-efficiency extruder, it can achieve higher melting efficiency and extrusion speed with lower energy consumption. At the same time, by optimizing the drying system, such as using infrared preheating, hot air circulation and other technologies, the drying efficiency has been improved, and energy consumption and exhaust emissions have been reduced.

5、 Functional expansion

On the basis of thermal sensitive coatings, further development of multifunctional coatings such as scratch resistant and wear-resistant coatings, antibacterial coatings, anti-static coatings, etc. The addition of these functional coatings enables BOPP thermosensitive synthetic paper to maintain its original advantages while also possessing more special functions, meeting the needs of different fields.

In summary, the current mainstream technology for producing BOPP thermal sensitive synthetic paper involves multiple aspects such as material formulation and production process, thermal sensitive coating technology, coating and printing technology, production equipment innovation, and functional expansion. The continuous innovation and development of these technologies not only improve the performance and quality of BOPP thermosensitive synthetic paper, but also broaden its application fields and market prospects.