In this episode, I'd like to introduce one of our products, EVA hot melt adhesive roll.

      As a professional sealing material in the field of medical packaging, EVA hot-melt adhesive tape rolls are dedicated to providing safe and reliable sterile barrier sealing solutions for medical devices, consumables, and pharmaceuticals. The product is made from medical-grade ethylene-vinyl acetate copolymer (EVA) as the base material, and is formed into a roll-shaped sealing material through advanced hot-melt adhesive coating technology. It provides a safe, reliable, and efficient permanent sealing solution for medical packaging, ensuring that medical products maintain a sterile state throughout their entire lifecycle. Through precise and stable adhesion, it effectively blocks microorganisms, dust, and moisture, ensuring that medical supplies maintain their sterile state and integrity throughout the entire cycle of sterilization, storage, transportation, and use. It is an indispensable part of the medical sterile protection system.

1. Core function: The "aseptic sealing core" of medical packaging

EVA hot melt adhesive roll is a specialized sealing material for the medical packaging field. Its core function is to provide a safe and reliable sealing solution for the packaging of medical supplies (devices, consumables, drugs, etc.). By precisely adhering to packaging interfaces, it establishes a long-lasting sterile barrier, preventing the intrusion of contaminants such as microorganisms, dust, and moisture. At the same time, it ensures the integrity and safety of medical supplies throughout the entire process of sterilization, storage, transportation, and use. It is an indispensable key link in the medical sterile protection system.

II. Core functional features: exclusive advantages tailored for medical scenarios

Safety and Compliance, Adapted to Medical Contact Requirements As a material that comes into direct or indirect contact with medical devices and drugs, EVA hot-melt adhesive rolls use medical-grade EVA (ethylene-vinyl acetate copolymer) as the core substrate. They do not contain harmful additives such as volatile organic compounds (VOCs) or heavy metals, and meet domestic medical packaging standards. At the same time, they have passed biocompatibility testing, with no odor or allergenicity. In mainstream medical sterilization processes such as high-temperature high-pressure sterilization at 134°C and EO (ethylene oxide) sterilization, their chemical structure remains stable, without degradation or release of pollutants, ensuring the safety of medical supplies. ​

Strong adhesion and weather resistance, suitable for complex medical environments High adhesive strength: Through precise adjustment of the vinyl acetate (VA) content (commonly adapted ratio is 25%-30%), the peel strength can reach over 2.0N/1.5cm. After sealing, the joint is tight and can withstand vibration and rubbing during transportation and handling, avoiding seal cracking that could lead to loss of sterile barrier effectiveness; Wide temperature range adaptability: Within the temperature range of -50℃ to 80℃, it maintains good flexibility and adhesive strength, adapting to low-temperature warehousing and cold chain transportation environments in the north, and also enduring the high-temperature cooling process after sterilization without embrittlement or debonding; Rapid prototyping: The melt index (MI) is usually between 30-50g/10min, providing excellent fluidity after heating, allowing for rapid and uniform filling of packaging gaps. After cooling for 3-5 seconds, it reaches practical strength, without affecting packaging efficiency. ​

Easy to operate and adapt, accommodating both manual and automated scenarios. During manual operation, no complex tools are required; simple heating or pressing is sufficient to complete the sealing process. When torn off, there is no paper residue, thus avoiding contamination of sterile items. It is compatible with automated packaging production lines. The paper roll design allows for seamless integration with automatic gluing and sealing and cutting equipment. It can precisely control the amount of glue applied and the bonding position according to packaging specifications, enhancing batch packaging efficiency and reducing manual operation errors. ​

Environmentally friendly and compatible with the green medical trend, EVA substrate itself possesses recyclable characteristics. Coupled with solvent-free hot melt adhesive technology, it can be naturally degraded after disposal, without environmental pollution. The paper roll design supports on-demand cutting, avoiding the waste of traditional block-shaped adhesive sealing materials. The material utilization rate can reach over 95%, in line with the development direction of "waste reduction and carbon reduction" in the medical field. ​

III. Core usage scenarios: Covering the entire process of medical packaging

The hospital disinfection and supply center is primarily used for sterilization packaging and sealing of surgical instruments (such as hemostatic forceps, forceps, surgical knives, etc.), endoscopes (gastroscopes, enteroscopes, laryngoscopes, etc.), and dental tools (dental drills, extraction instruments, etc.). Whether it's small-batch emergency packaging (such as emergency surgical instruments) or large-batch routine sterilization packaging for instruments, the center can quickly complete the sealing process. Furthermore, once opened, there are no residues, ensuring no contamination of sterile instruments and safeguarding the safety of surgery and diagnosis. ​

Medical consumables production packaging is suitable for the factory packaging of disposable medical consumables, such as disposable syringes, infusion sets, catheters, wound dressings, sampling tubes, etc. The high adhesive force ensures that the consumables remain intact during storage and transportation, avoiding damage and contamination. At the same time, it is compatible with high-speed automated packaging equipment, meeting the large-scale production needs of consumable manufacturers and enhancing production capacity. ​

In the field of pharmaceutical packaging, it is used for sealing traditional Chinese medicine decoctions, oral medication dosage packaging, and external disinfectants (such as alcohol cotton swabs and iodophor cotton swabs). It exhibits excellent moisture resistance, oxidation resistance, and odor migration resistance, effectively ensuring the efficacy and shelf life of drugs and disinfectants. Additionally, the sealed joint is easy to tear, facilitating patient use. ​

In high-end specialized medical scenarios, products such as vaccines and biologics, which have stringent requirements for sealing and cold chain management, can utilize EVA hot-melt adhesive rolls for their transportation packaging sealing. Leveraging its low-temperature resistance and impact resistance properties, EVA ensures that the seal remains effective during cold chain transportation. For packaging of medical aesthetic devices (such as injection needles and cosmetic instruments) and precision medical instrument accessories, it is essential to balance sealing safety with packaging integrity. EVA hot-melt adhesive rolls, with their strong adhesion and residue-free characteristics, are a precise fit for this purpose.