Aluminum foil gaskets are a common sealing material, due to their excellent flexibility, resistance to high temperatures, moisture resistance, corrosion resistance, and other characteristics, they are widely used in many fields. Here are the main uses and precautions for aluminum foil gaskets:
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### **1. The main uses of aluminum foil gaskets**
1. Sealed to Prevent Leakage
- **Packing Industry**: Sealing of containers used for food, medicines, cosmetics, etc. (e.g., bottle openings, can openings), preventing air, moisture, or contaminants from entering.
- **Industrial Equipment**: Used as gaskets at the joints of pipes, valves, and mechanical equipment to prevent the leakage of liquids or gases.
2. **Insulation and Thermal Protection**
- As an insulation layer in high-temperature equipment (such as ovens, boilers), reflecting heat, reducing energy loss.
- Used in construction or cold-chain logistics to enhance insulation performance.
3. **Anti-moisture and anti-oxidation**
- Protect electronic products, precision instruments, or metal parts to avoid moisture or oxidation.
- In drug packaging, prevent the drug from becoming damp and deteriorating.
4. **Electromagnetic Shielding**
- The conductivity of aluminum foil can be used in electronic devices to shield electromagnetic interference (EMI).
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### **Steps for Use**
1. Surface cleaning
Ensure that the surface to be sealed is clean, dry, and free of oil or dust to avoid affecting the sealing effect.
2. Cut to the appropriate size
Cut the aluminum foil gasket according to the shape and size of the sealing area, making it slightly larger than the contact surface to ensure complete coverage.
3. Install the gasket
Place the aluminum foil gasket flat on the sealing position to avoid folding or creasing. For bottle and can packaging, it is usually directly pressed between the bottle mouth and the lid.
4. Compaction and Fixing
By tightening the cap, bolt, or pressure device to make the gasket tightly contact with the surface, forming a seal.
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### **三、注意事项**
1. **Material Selection**
- Choose pure aluminum foil or composite aluminum foil (such as aluminum foil + PE layer) according to the needs, the latter enhances corrosion resistance and sealing properties.
- High-temperature environments require the use of aluminum foil that is resistant to high temperatures (such as by increasing the thickness or adding a coating).
2. **Avoid Mechanical Damage**
- Aluminum foil is thinner, so it should be handled gently when installing to prevent sharp objects from piercing and causing the seal to fail.
3. **Temperature Limitations**
- The temperature resistance range of ordinary aluminum foil is about -50℃ to 300℃, and special treatment is required for ultra-high temperature environments.
4. Regular Inspection
- Long-term use of aluminum foil gaskets in industrial equipment requires regular replacement to avoid aging and leakage.
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### **四、常见应用场景**
- **Food Packaging**: The sealing of yogurt bottles, tins, and cans.
- **Drug Packaging**: Anti-moisture sealing of drug bottles and medical reagent containers.
- **Electronics**: Battery and electromagnetic shielding or moisture protection for circuit boards.
- **Industrial Sealing**: Sealing for automotive engines, pipe flanges, and chemical equipment.
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### **Five, Advantages Summarized**
- **Lightweight and easy to process**: Easy to cut and fit complex shapes.
- **Environmental Protection**: Recyclable and in line with the green packaging trend.
- "Low Cost": Compared to other metal gaskets, aluminum foil offers high value for the cost."
Proper use of aluminum foil gaskets can significantly improve sealing performance and product safety. It is necessary to select materials reasonably and operate in a standardized manner according to the specific scenario.
