PET flake aluminum foil is a common sealing material used for plastic bottles, widely applied in PET packaging for health supplements, food, cosmetics, and more. It is primarily used in heat-sealing processes to prevent moisture, avoid leakage, and extend shelf life.
Product Structure and Composition
This sealing disc is composed of multiple laminated layers, each serving a specific function:
- Polyester (PET) layer – Offers mechanical strength and smooth surface appearance
- PE foam layer – Provides cushioning and improves sealing contact
- Aluminum foil layer – Delivers an excellent moisture and oxygen barrier
- Polyester heat-seal film – Ensures strong bonding with the bottle mouth upon heat sealing
All layers are bonded using adhesive to form a functional and reliable seal liner, compatible with PET bottle mouths. The structure protects the contents from humidity, oxidation, and leakage.
Key Specifications
| Item | Value |
|---|---|
| Total Thickness | 0.20 mm ± 0.05 mm |
| Storage Conditions | Humidity 40%–65%, Temp. 0℃–30℃ |
| Function | Sealing, moisture-proof, and contamination prevention |