Vacuum Bottle-HS-021B

30ML 50ML Airless Bottle Leak Proof Refillable jar for Toiletries HS-021B meets the needs of mid-to-high-end skin care products with its anti-oxidation properties and reusable design.
1. Capacity and size
The capacity is 30ml and 50ml, which belongs to medium-sized cosmetic packaging. The vacuum bottle ensures that the piston and the bottle wall are precisely matched. If the gap is too tight, it will be difficult to press, and if it is too loose, it will leak easily.
Structural design: The piston vacuum system is adopted. When pressing the pump head, the bottom piston pushes up to isolate the air from contacting the contents to prevent oxidation and deterioration.
Leakage prevention key: It relies on the air pressure balance mechanism of the air hole at the bottom of the bottle. Special equipment is required to exhaust the air during filling to avoid bubbles causing failure of pressing.
Repeated filling: It supports multiple opening and filling, but it is necessary to ensure that the viscosity of the inner material is moderate (low viscosity and no particles), otherwise it is easy to clog the pump core or leak.
2. Materials and production process
Bottle body: Highly transparent AS plastic, taking into account transparency and chemical stability, suitable for liquid products such as essence.
Accessories: The upper cover/base is mostly made of ABS (to enhance impact resistance), and some are made of PP (polypropylene) to improve corrosion resistance.
Environmental trends: The demand for recyclable PP vacuum bottles is increasing, and biodegradable materials such as PETG are less used due to technical difficulties.
3. Secondary processing technology
The surface treatment is electroplating (to enhance the metal texture), spraying (UV coating to prevent scratches), hot stamping/silk screen printing.
4. Applicable contents
Recommended: Essence lotion with good fluidity, without abrasive particles.
Filling and storage requirements: Use a vacuum-specific filling machine, and the inner material must be filled until the bottleneck contacts the pump head to avoid direct sunlight or heavy pressure that may cause the piston to deform.