Application of White PET Polyester Film Material Labels in Double-Layer High-Temperature Sterilization Adhesive Tape

In the medical, pharmaceutical, and certain industrial sectors, high-temperature sterilization is a crucial step to ensure product sterility and safety. Double-layer high-temperature sterilization adhesive tapes are widely used in medical devices, packaging seals, and various high-temperature and high-pressure sterilization environments due to their unique structure and excellent performance. To ensure that these tapes can be effectively identified, traced, and provide necessary information during the sterilization process, a high-temperature resistant label material is essential. In this regard, white PET (polyethylene terephthalate) polyester film material is becoming the material of choice.

Characteristics and Challenges of Double-Layer High-Temperature Sterilization Adhesive Tape
Double-layer high-temperature sterilization adhesive tapes typically consist of two different adhesive layers, designed to provide excellent sealing and reliable performance in high-temperature and high-pressure steam sterilization environments. Their main challenges include:
High-Temperature Resistance: The tape and its label must withstand steam sterilization temperatures ranging from 121°C to 134°C or even higher, without deformation, discoloration, or detachment after prolonged exposure.
High-Pressure Environment: The high pressure generated during sterilization demands higher adhesion from the label.
Humidity and Chemical Reagents: The steam sterilization environment is rich in water vapor and may involve contact with disinfectants, requiring the label material to have good moisture and chemical resistance.
Information Clarity: Information on the label must remain clear and legible after sterilization for traceability and management.

Advantages of White PET Polyester Film Material
White PET polyester film, due to its outstanding comprehensive performance, perfectly meets the labeling requirements of double-layer high-temperature sterilization adhesive tape:
Exceptional High-Temperature Resistance: PET film itself has a high glass transition temperature and melting point, allowing it to maintain structural stability at temperatures of 150°C or even higher, far exceeding the temperatures required for general high-temperature sterilization. This ensures the label does not deform or curl during the sterilization process.
Excellent Dimensional Stability: In high-temperature and high-humidity environments, the dimensional change of PET film is minimal, guaranteeing the precision and clarity of printed label content and preventing information from blurring or deforming due to shrinkage or expansion.
Superior Physical and Mechanical Properties: PET film possesses high tensile strength, tear resistance, and abrasion resistance, effectively resisting physical stresses during the sterilization process and preventing damage.
Good Chemical Corrosion Resistance: PET film exhibits good resistance to water, steam, alcohol, and common disinfectants, ensuring the label remains intact in complex environments.
Excellent Printability: The smooth surface of white PET film is ideal for printing methods such as thermal transfer and flexographic printing, allowing for clear display of critical information like barcodes, batch numbers, production dates, expiration dates, and sterilization indicators. The white background also provides good contrast for easy readability of information.
Good Adhesive Compatibility: The surface of PET film is easy to treat and can form a strong bond with various high-performance high-temperature resistant adhesives (such as acrylic pressure-sensitive adhesives), ensuring the label does not detach in high-temperature and high-pressure environments.

Considerations in Practical Application
When applying white PET polyester film material to double-layer high-temperature sterilization adhesive tape labels, the following points also need to be considered:
Matching Adhesive: Select a pressure-sensitive adhesive that also possesses excellent high-temperature, high-pressure, and hydrolysis resistance to ensure the label adheres firmly in harsh environments.
High-Quality Printing Ribbons/Inks: Ensure that the printing ink or ribbon combines perfectly with the PET film and remains clear and abrasion-resistant after high-temperature sterilization.
Integration of Sterilization Indicators: To verify successful sterilization, many high-temperature sterilization labels integrate chemical sterilization indicators (e.g., areas that change color after sterilization). White PET as a substrate can effectively highlight the color changes of these indicators, making them more noticeable.
Customization Needs: Depending on the width, length of the tape, and the actual application environment, the size and shape of the PET label can be customized, and pre-perforation or easy-tear line designs can be considered for convenient use.

Conclusion
White PET polyester film material, with its outstanding high-temperature resistance, dimensional stability, physical and mechanical properties, chemical corrosion resistance, and excellent printability, has become an ideal choice for double-layer high-temperature sterilization adhesive tape labels. It not only ensures the integrity and readability of information under stringent sterilization conditions but also provides reliable assurance for safe production and quality control in industries such as medical and pharmaceutical. As the demand for traceability and safety of sterilized products continues to increase, the application prospects for white PET polyester film labels will become even broader.