Sealing gaskets (usually referring to the induction sealed aluminum foil gaskets we are discussing) play the role of "multifunctional integrated guardians" in packaging, and their function goes far beyond simple sealing. It is a key component that ensures the safety, stability, and reliability of the entire process from the factory to the consumer's hands. Next, Leadtra will introduce the role of sealing gaskets in packaging in two articles. 

I、Core Function - Comprehensive Barrier Protection 

1. Absolute sealing ensures product stability 

Moisture and oxidation prevention: This is the most essential function. The gasket forms an excellent barrier of air tightness and water tightness, effectively blocking water vapor and oxygen in the air. This is crucial for drugs (to ensure efficacy), milk powder and coffee (to prevent clumping), and health products (to prevent spoilage), as it can significantly extend their shelf life. 

Block off odors and maintain fragrance: prevent external odors from entering, while also preventing the loss of the product's own aroma or active ingredients from evaporating. 

2. Anti counterfeiting and tamper proof, ensuring safe use 

Disposable evidence: Once the gasket is torn open, it cannot be restored, which is the most intuitive proof that the product has not been illegally opened or tampered with. This provides consumers with the primary sense of security, effectively preventing malicious contamination, exchange, or counterfeiting. 

3. Prevent leakage and keep the packaging intact 

During transportation and storage, even if the outer cover is loose, the inner sealing gasket can firmly lock the contents, prevent liquid leakage or powder spillage, and avoid waste and pollution. 

II、 Special function: Design based on product requirements 

1. Balanced air pressure (for liquid products) 

For liquid preparations (such as syrup, oral liquid), a pressure difference between the inside and outside of the bottle is prone to occur under temperature changes or high altitude environments. Some specially designed gaskets have a certain degree of breathability, which can slowly balance the air pressure and prevent the medication from being difficult to pour out or suddenly splashing due to negative or positive pressure when opening the lid. 

2. Antibacterial and Aseptic Protection (Pharmaceutical Grade Applications) 

In the packaging of drugs and medical devices, gasket materials must meet medical grade standards, providing physical sealing while effectively blocking the invasion of bacteria and microorganisms, ensuring the sterile state of internal products. 

Leadtra Packaging is a wholesale and customized manufacturer of aluminum foil sealing film and sealing gasket, specializing in the research and development, production of various high barrier packaging materials and easy to tear sealing packaging materials. We can provide one-stop services from consultation, design, sampling, production, testing, after-sales service, etc. If you are interested in or have any questions about us, please feel free to call us for consultation.