UChain | Essential Basics to Know When Procuring Vacuum Bottle Containers
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Introduction: Many cosmetics on the market contain substances like amino acids, proteins, and vitamins, which are highly susceptible to dust, bacteria, and contamination. Once contaminated, these products not only lose their efficacy but can also become harmful! Vacuum bottles block the contents from contacting air, effectively reducing the risk of product deterioration and bacterial growth due to air exposure. They also allow cosmetic manufacturers to reduce the use of preservatives and antimicrobial agents, providing consumers with greater assurance.
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A vacuum bottle is a high-end packaging solution composed of an outer cap, pump assembly, bottle body, inner piston (or follower plate), and base cap. Its introduction aligns with the latest trends in cosmetics, effectively protecting the quality of the contents. However, due to its relatively complex structure and higher production costs, the use of vacuum bottles is generally limited to individual high-priced and high-demand product categories, making it challenging to widely adopt them across the market to meet the packaging needs of cosmetics at different price points.
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1. Design Principle
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The design principle of a vacuum bottle is based on atmospheric pressure and relies heavily on the output force of the pump assembly. The pump must have excellent one-way sealing performance to block air from flowing back into the bottle, creating a low-pressure state inside. When the pressure difference between the low-pressure area inside the bottle and the atmospheric pressure is greater than the friction between the piston and the inner bottle wall, the atmospheric pressure pushes the inner piston to move forward. Therefore, the piston cannot fit too tightly against the inner bottle wall; otherwise, the friction will be too high, preventing the piston from advancing. Conversely, if the fit is too loose, leakage is likely to occur. Thus, vacuum bottles require highly specialized production techniques.
2. Product Features
Vacuum bottles also provide precise dosage control. Once the diameter, stroke, and spring force of the pump assembly are set, each press delivers an exact and fixed amount, regardless of the button design. Furthermore, the discharge amount per press can be adjusted by changing components within the pump assembly, with precision up to 0.05 ml, depending on product requirements.
Once a vacuum bottle is filled, minimal air and moisture can enter the container throughout its journey from the production factory until it is completely used by the consumer. This effectively prevents contamination during use and extends the product’s effective shelf life. Aligning with current environmental trends and the call to avoid adding preservatives and antibacterial agents, vacuum packaging becomes even more crucial for extending product shelf life and protecting consumer rights.
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1. Product Classification
By Structure: Standard vacuum bottle, single-container compound vacuum bottle, double-container compound vacuum bottle, non-piston type vacuum bottle.
By Shape: Cylindrical, square (cylindrical being the most common).
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Vacuum bottles are typically cylindrical or oval, with common specifications ranging from 10ml to 100ml. They generally have a smaller overall capacity. Relying on the principle of atmospheric pressure, they help avoid contamination during cosmetic use. The appearance of vacuum bottles can be treated with processes like hot stamping (electroformed aluminum), plastic plating, spraying, and colored plastics. They are more expensive than other standard containers, but the minimum order quantity (MOQ) requirement is usually not very high.
2. Product Structure Reference
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3. Structural Assembly Diagram Reference
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The main components of a vacuum bottle include: pump assembly, cap (or cover), actuator (button), outer sleeve (or shroud), screw thread, gasket, bottle body, inner piston (follower plate), and base cap. Exterior parts can undergo decorative treatments such as plating, hot stamping, spraying, silk screening, and gold stamping, depending on the design requirements. The pump assembly involves precision molds, and clients rarely create their own custom molds. The main components of the pump assembly include: piston, stem, spring, housing, and valve.
4. Other Types of Vacuum Bottles
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All-plastic self-sealing valve vacuum bottles contain a carrier disc at the bottom that moves upwards within the bottle body. The bottle base has an air hole. The area below the disc contains air, while the cosmetic product sits above it. The product is dispensed via the pump from the top, causing the carrier disc to continuously rise. When the product is used up, the disc reaches the very top of the bottle interior.
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Vacuum bottles are widely used in the cosmetics industry, primarily suitable for products like creams, lotions, emulsions, and serums.