Which aluminum foil is better for PET bottles

Pressure sensitive aluminum foil
advantage
Easy to operate: Without additional heating equipment and other complex operations, only a certain pressure can be applied to achieve sealing, which is more suitable for some scenarios with high production efficiency and simple operation requirements, such as manual packaging for small enterprises or production lines with not very high packaging speed requirements.
Instant sealing: It can complete the sealing in a short time, and has certain advantages for product packaging that requires quick turnover or quick shipment, such as some seasonal foods, temporary promotional products, etc.
Resealable: If there is a need to re-seal after opening, the pressure sensitive aluminum foil is relatively easier to achieve resealing, as long as the performance of the pressure sensitive adhesive is not greatly affected, you can press the seal again, suitable for some PET bottle packaging that may require multiple access to the contents, such as seasoning bottles, small cosmetics bottles, etc.
shortcoming
Limited sealing strength: Compared with heat sealing induction aluminum foil, its sealing strength is relatively low, in the case of large external extrusion, collision or long-term storage, there may be a loose seal.
Relatively weak moisture resistance: in a high humidity environment, the viscosity of the pressure-sensitive adhesive is easily affected, resulting in a decline in the sealing effect.
Application scenario
Cosmetics industry: such as creams, lotions and other small PET bottle packaging, usually not affected by extreme environments and external forces, and may need to be opened several times to use, pressure sensitive aluminum foil can better meet the needs.
Food industry: Some short-term storage, fast turnover of food, such as small packages of sauces, jams and other PET bottle packaging, pressure sensitive aluminum foil can provide basic sealing protection.
Heat seal induction aluminum foil
advantage
High sealing strength: Through the hot sealing process, the aluminum foil and PET bottle mouth form a close combination, can effectively prevent liquid leakage, gas penetration, for long-term storage, transportation process may be bumpy collision PET bottle products, can provide more reliable sealing protection, such as cooking oil, medicine, beverage and other PET bottle packaging.
Good barrier performance: the sealing layer formed after heat sealing can better block air, water vapor, light, etc., which is conducive to maintaining the quality and stability of the products in the PET bottle, extending the shelf life of the products, especially suitable for products with high moisture-proof and anti-oxidation requirements, such as health products, high-end alcohol and so on.
Better moisture resistance: compared with pressure sensitive aluminum foil, the sealing structure formed by heat sealing induction aluminum foil is relatively more stable after heat sealing, and the degree of influence by humidity is less, which can maintain a good sealing effect to a certain extent.
shortcoming
The sealing of heat sealing induction aluminum foil requires special heat sealing equipment and technology, which has high requirements for production conditions and operation, increasing the cost of packaging and equipment investment.
Not easy to reseal: Once the heat seal is completed, it is difficult to return to the original sealing state after opening again, and it is not suitable for product packaging that needs to be frequently opened and resealed.
Application scenario
Pharmaceutical industry: The sealing and barrier requirements of the packaging of drugs are extremely high, heat sealing induction aluminum foil can effectively prevent the drug from moisture, oxidation and deterioration, to ensure the quality and safety of drugs, often used in oral liquid, eye drops and other PET bottle packaging.
Beverage industry: All kinds of bottled beverages need good sealing during transportation and storage to prevent liquid leakage and gas entry, and heat-sealed induction aluminum foil can meet this demand to ensure the taste and quality of the beverage.