Introduction: Good skincare products contain substances such as amino acids and proteins, which are highly susceptible to dust, bacteria, and easily contaminated. Once contaminated, not only do they lose their intended effects, but they can also become harmful. Vacuum bottles can completely isolate the contents from the air, preventing product oxidation, deterioration, and bacterial growth. Its high-tech functionality ensures product quality.

150mL PP airless bottles

150mL PP airless bottles china

ONE Product Definition: A vacuum bottle is a high-end packaging container composed of a cap, pump head, cylindrical or elliptical body, and a piston placed at the bottom of the bottle. Its introduction aligns with the latest trend in skincare products, effectively preserving product freshness. However, due to the complex structure and higher cost of vacuum bottles, their utilization is limited to a few specific product categories, preventing widespread adoption in the market to meet the diverse packaging needs of skincare products.

TWO Manufacturing Process:

  1. Design Principle: The design principle of a vacuum bottle is to create a vacuum state inside the bottle by utilizing the contracting force of a spring and preventing air from entering. Vacuum packaging utilizes the principle of separating internal compartments and expelling the content by compressing it, using atmospheric pressure to push the piston at the bottom of the bottle forward. When the diaphragm moves upward inside the bottle, it creates pressure, resulting in the content being in a near 100% vacuum state. However, the spring force and atmospheric pressure alone are not sufficient to provide enough force to tightly seal the piston against the bottle wall. If the resistance is too high, the piston will not be able to move forward. Conversely, if the piston moves too easily, it can lead to leakage. Therefore, the production process of vacuum bottles requires a high level of expertise.
  2. Product Features: Vacuum packaging also provides precise dosage control. Once the dispensing hole and specific vacuum pressure are set, regardless of the shape of the pump head, each application delivers an accurate and fixed amount. Therefore, the dosage can be adjusted by changing certain components, ranging from a few microliters to milliliters, according to the requirements of the product.

Once assembled, vacuum packaging minimizes the entry of air into the container during the self-filling process until consumer use, thereby minimizing contamination or degradation of the contents. This is the advantage of vacuum packaging – it provides a secure packaging solution that avoids contact with air, reduces the likelihood of changes and oxidation, especially for delicate natural ingredients. In the context of the demand for preservative-free products, vacuum packaging plays a crucial role in extending product shelf life.

THREE Structural Overview:

  1. Product Classification: Based on structure: ordinary vacuum bottles, rotary vacuum bottles, integrated vacuum bottles, dual-tube vacuum bottles. Based on shape: cylindrical, square, with cylindrical shape being the most common. Vacuum bottles are typically cylindrical with capacities ranging from 15ml to 50ml (some reaching 100ml). Their overall capacity is relatively small, relying on the principle of atmospheric pressure to prevent contamination during the use of cosmetics. Vacuum bottles are available in options such as electroplated aluminum, plastic plating, and colored plastic. They are generally more expensive than regular containers, but the minimum order requirement is not high.
  2. Product Structure Reference:
  3. Reference for Structural Diagram
  4. The pump head is the main component of the vacuum bottle, which generally includes: cap, nozzle, connecting rod, gasket, piston, spring, valve, pump body, suction tube, valve ball (steel ball, glass ball), etc. The bottle cap and dust cover can be colored, electroplated, or fitted with an aluminum ring. Due to the large number of molds involved in a set of pump heads and the large order quantity (minimum order quantity: 10,000 to 20,000), the delivery time is confirmed after the sample is approved, which takes about 15 to 20 days. White and general-purpose types are often available in stock. Distributor customers rarely develop their own molds due to the high cost and the requirement for multiple molds.
    1. Other Types of Vacuum Bottles

    The all-plastic self-sealing valve vacuum bottle has a circular disc at the bottom end that can move up and down inside the bottle. The bottom of the vacuum bottle has a circular hole, with air below the disc and skincare product above it. The skincare product is pumped out from the top by a pump, while the supporting disc continuously rises. When the skincare product is depleted, the disc reaches the top inside the bottle.

    FOUR Key Points of Procurement

    1. Testing of Vacuum Pumps Vacuum pumps require the following components: spring, sealing valve (or sealing ball), piston, and pump body casing (the size determines the pumping quantity per cycle). The challenge with vacuum pumps lies in the sealing performance of each component. Due to the extremely high requirement for airtightness, the molds and parts need to meet high standards; otherwise, it may result in material blockage.
    2. Airtightness of Vacuum Bottles The friction and airtightness between the inner piston and the bottle are crucial factors. The magnitude of friction is the core of a vacuum bottle as it affects both airtightness and the up-and-down movement of the piston. Therefore, this point should also be noted.
    3. Determining the Quality of Vacuum Bottles During filling, it is important to ensure that the material is pumped steadily and the dispensing quantity is stable. The airtightness should be tested under the condition of -0.06 Mpa for approximately 5 minutes, with both upright and sideways positions. The entire bottle of material should be sprayed out consistently to confirm stability.