Test method for sealing performance of silicone cosmetic bottles

To test the sealing performance of silicone cosmetic bottles, the following methods can be applied to ensure they are secure, durable, and leak-proof:

1. Visual Inspection

Purpose: To check for visible defects in the sealing area.

Method: Examine the bottle’s cap, body, and seal area for any visible cracks, misalignments, or damage that could compromise the seal.

Acceptance Criteria: No visible cracks or gaps around the seal.

2. Leakage Test (Pressure Test)

Purpose: To simulate real-life conditions and check if the silicone bottle seals properly under pressure.

Method:

Fill the bottle with water or a similar liquid.

Close the cap securely.

Apply pressure using a hydraulic press or by squeezing the bottle.

Observe any leakage around the sealing area.

Acceptance Criteria: No leakage should occur during the pressure application.

3. Vacuum Test

Purpose: To determine if the bottle can maintain a vacuum seal under low-pressure conditions.

Method:

Place the bottle in a vacuum chamber.

Remove air from the chamber to simulate a vacuum.

Check if the cap remains sealed without any leakage.

Acceptance Criteria: The bottle should maintain its vacuum without any air entering.

4. Drop Test

Purpose: To test the seal’s integrity during impacts or drops.

Method:

Fill the bottle with liquid.

Drop the bottle from a set height (typically around 1 meter).

Check for leakage after the impact.

Acceptance Criteria: The bottle should not leak after the drop.

5. Temperature Cycling Test

Purpose: To evaluate how the seal performs under temperature fluctuations.

Method:

Place the sealed bottle in an environment where the temperature changes between hot and cold (e.g., -20°C to 50°C).

After each cycle, inspect the seal for any leakage.

Acceptance Criteria: The seal should not leak after several temperature cycles.

6. Internal Pressure Test (Burst Test)

Purpose: To simulate internal pressure buildup and test the seal’s strength.

Method:

Seal the bottle and increase internal pressure gradually using a pressure chamber.

Monitor the bottle to detect any deformation or leakage.

Acceptance Criteria: The bottle should maintain its seal without bursting or leaking up to a certain pressure threshold (usually specified by the manufacturer).

7. Cap Tightening Torque Test

Purpose: To ensure that the cap is tightened with the proper torque to ensure a good seal.

Method:

Use a torque tool to measure the amount of force needed to close the bottle cap.

Compare the measured torque with the recommended value.

Acceptance Criteria: The bottle should seal effectively at the specified torque without over-tightening, which could damage the seal.

8. Long-Term Storage Test

Purpose: To determine if the seal remains effective over time under storage conditions.

Method: Store the bottle in varying environmental conditions (e.g., high humidity, sunlight, or heat) for an extended period (e.g., several months).

Acceptance Criteria: The bottle should show no signs of leakage or seal failure after long-term storage.

These tests should be carried out in accordance with industry standards, and they help determine if the silicone cosmetic bottle is reliable for consumer use.