This small component plays a big role in ensuring product integrity, preventing leakage, and extending shelf life. So, what exactly does a sealing liner do, and how should you choose the right type for your product?
Functions of a Bottle Cap Sealing Liner
Leak Prevention
The primary role of the sealing liner is to prevent liquid or gas from leaking out of the container during transportation, storage, or usage.
Enhanced Airtightness
A well-fitted liner helps maintain a tight seal between the cap and bottle neck, blocking out external air and moisture. This is particularly important for oxygen-sensitive or volatile contents.
Product Protection
The liner acts as a barrier that prevents contamination, oxidation, or evaporation, which is crucial for pharmaceuticals, health supplements, and food products.
Tamper Evidence and Freshness Assurance
Some types of liners, such as induction seals, provide a visible indication if the product has been opened or tampered with, offering added consumer confidence.
Common Types of Sealing Liners and Their Applications
Sealing liners play a crucial role in preventing leaks, preserving freshness, and ensuring product safety. Here are the common types:
Pressure-Sensitive Liners (PS Liners): Activated by cap pressure, used for dry goods and supplements. Easy to use and cost-effective, but not suitable for liquids or long-term storage.
Induction Heat Seal Liners (Aluminum Foil Seals): Require induction sealing machines. Offer excellent leak-proof and tamper-evident performance, perfect for pharmaceuticals, food, and oils.
Two-Piece Liners (e.g., FS5-8): Feature a foil seal plus backing material for enhanced protection. Best for sensitive or high-value liquid products needing strong sealing and long shelf life.
We offer a wide range of sealing gaskets and strict sealing inspections to ensure safety and stability throughout the supply chain.