Analysis and Classification of Plastic Pump-Top Bottle Caps for Lotion Shampoo

Plastic pump head cap quality:

1. Smooth pumping action with quick liquid dispensing

2. Excellent sealing performance with no leakage

3. Uniform spray volume for optimal results

Plastic pump head cap features:

1. Pumped dosage: 2±0.2g per pump, up to 6 pumps, with a tube length of 25cm or less.

2. Opening torque: After assembly, the torque value after 72 hours is “2KGF.M ≤ opening force value ≤ 10KGF.CM.”

3. Sealing performance: When the bottle is fully filled (with water or lotion) and the product is securely locked, it does not leak under any storage conditions at room temperature (43°C) or low temperature (10°C). Under vacuum pressure of -0.08 MPa, it maintains pressure for 5 seconds without leakage. Under external pressure of 10 N, it maintains pressure for 3–5 minutes without leakage.

4. Straw length: ±2 mm

5. Destruction test: The product is dropped freely from a height of 1.2 meters onto a horizontal surface three times, and no components separate.

6. Service life: ≥20,000 cycles

Plastic pump head cap material analysis:

1. BPA-free

Also known as bisphenol A, BPA is added to plastic products to impart colorless transparency, durability, lightweight properties, and excellent impact resistance. It is widely used in the manufacturing of plastic bottles, canned food and beverage packaging, baby bottles, water bottles, eyeglass lenses, and hundreds of other daily necessities. However, BPA is a toxic substance that can cause endocrine disruption, cancer, and obesity resulting from metabolic disorders, posing a threat to human health.

2. Leak-proof

A tightly sealed screw cap prevents leakage of contents, ensuring safe transportation.

3. Acid-resistant

Some beauty-related liquids are weakly acidic. PET material's unique acid resistance prevents corrosion, allowing for better packaging of items. However, some weakly acidic products are not suitable and may cause material degradation.

4. Safety

Many pump caps on the market are made from recycled materials. These low-quality materials not only cause contamination and are prone to damage but also affect the quality of the contents.

Important notes for using plastic pump caps:

1. Do not fill with high-concentration essential oils or strong acidic liquids to prevent material degradation.

2. Storing repackaged items for an extended period may cause spoilage; please use them promptly and avoid leaving them unused for more than six months.

3. They can be cleaned and disinfected with water or alcohol; however, avoid using water exceeding 45°C for rinsing.

4. The spray nozzle and other internal components are not heat-resistant; avoid soaking or cleaning them with water exceeding 45°C to prevent deformation.