AS Vacuum Bottles for Cosmetic Packaging: Production Process, Quality Inspection and Application Cases
In the cosmetic packaging market, the high-quality presentation of AS vacuum bottles is not accidental, but stems from a rigorous production process and a strict quality inspection system. At the same time, their practical application cases in different brands and scenarios more intuitively confirm their adaptability and value in the field of cosmetic packaging. In-depth understanding of these contents can enable industry practitioners and consumers to have a more comprehensive understanding of AS vacuum bottles and provide references for relevant decisions.
1. Production Process: Refined Control from Raw Materials to Finished Products
The production of AS vacuum bottles is a process of collaboration among multiple links, and each step requires refined control to ensure that the quality and performance of the final product meet the requirements, mainly covering three core stages: raw material pretreatment, molding processing, and assembly and debugging.
(1) Raw Material Pretreatment: Laying the Foundation for Quality
The pretreatment of AS material is the first step in production, which directly affects the physical properties and safety of the bottle body. First, it is necessary to screen and purify the purchased AS resin particles, and remove impurities (such as dust, metal debris, etc.) from the particles through professional equipment to avoid impurities affecting the transparency and structural stability of the bottle body; second, drying treatment is carried out. If AS resin particles contain moisture, bubbles are easily generated during the subsequent molding process, affecting the appearance and sealing of the bottle body. Therefore, the particles need to be placed in a drying equipment and dried at a specific temperature (usually 70-80℃) for 4-6 hours to ensure that the moisture content is controlled below 0.1%; finally, according to the product design requirements, a small amount of color masterbatch or functional additives (such as anti-ultraviolet agents) can be added to the AS resin, but the addition ratio must be strictly controlled to avoid affecting the original performance of the AS material and ensure that the additives meet the safety standards of cosmetic packaging materials.
(2) Molding Processing: Shaping Precise Structure
The molding processing of AS vacuum bottles mainly includes bottle body molding and pump head component molding. Different components adopt different processing techniques to ensure structural accuracy.
Bottle Body Molding: The injection molding process is generally used. The pretreated AS resin particles are put into the barrel of the injection molding machine, heated and melted into a molten state, and then the molten material is injected into the cavity of the bottle body mold at high pressure by the screw of the injection molding machine. After the molten material is cooled and solidified, the mold is opened to take out the bottle blank, and then the subsequent trimming and polishing are carried out to remove the burrs and defects on the edge of the bottle blank, making the surface of the bottle body smooth and flat. In this process, it is necessary to strictly control the injection temperature (usually 200-230℃), injection pressure and cooling time to ensure that the bottle body has uniform thickness, no bubbles, no deformation, and the size is highly consistent with the design drawing.
Pump Head Component Molding: As the core functional component of the AS vacuum bottle, the pump head has a relatively complex structure, and its production involves a variety of processes. The main body of the pump head (such as the outer cover and piston) is mostly formed by injection molding, while small precision components such as springs and valves are formed by precision stamping or injection molding processes. For example, the spring needs to be made of corrosion-resistant stainless steel, processed into a specific specification by stamping equipment to ensure elasticity and service life; the valve needs to be injection-molded with a high-precision mold to ensure the fit between the valve core and the valve seat and avoid air leakage.
(3) Assembly and Debugging: Ensuring Stable Function
The formed bottle body and pump head components need to go through strict assembly and debugging to form a complete AS vacuum bottle. First, component cleaning is carried out. The bottle body and each component of the pump head are put into a dust-free cleaning equipment, and food-grade cleaning agents are used to remove surface oil and dust to ensure compliance with the hygiene standards of cosmetic packaging; second, automated assembly is carried out. Through a professional assembly production line, the piston, spring, valve, outer cover and other components of the pump head are assembled in sequence, and then accurately connected with the bottle body. During the assembly process, the assembly force must be controlled to avoid component damage due to excessive force or loose connection due to insufficient force; finally, functional debugging is carried out. The assembled AS vacuum bottle is vacuumed, and the pressing smoothness, liquid output stability and sealing of the vacuum pump head are tested. If problems such as unsmooth pressing, uneven liquid output or poor sealing are found, it is necessary to disassemble and inspect in time and re-debug until all functional indicators meet the standards.
2. Quality Inspection: Multi-Dimensional Guarantee of Product Compliance and Safety
To ensure that AS vacuum bottles meet the relevant standards and usage requirements of cosmetic packaging, comprehensive quality inspection must be carried out from three dimensions: physical performance, chemical safety, and functional performance to prevent unqualified products from entering the market.
(1) Physical Performance Inspection: Verifying Structure and Durability
Physical performance inspection mainly focuses on the structural stability and service durability of AS vacuum bottles. Common inspection items include:
Drop Test: The AS vacuum bottle filled with simulated contents (liquid with density similar to that of actual cosmetics) is freely dropped from a height of 1.2 meters (simulating daily dropping scenarios) onto the cement ground. After 3 consecutive drops, check whether the bottle body is cracked or deformed, and whether the pump head is loose or leaking, to ensure that the product can remain intact in case of accidental dropping;
Compression Test: Use a pressure test equipment to apply a certain pressure (usually 500N) to the bottle body, keep it for 30 seconds, and observe whether the bottle body is dented or cracked, to verify the compression resistance of the bottle body in the scenario of transportation stacking or daily extrusion;
Transparency Test: Measure the light transmittance of the bottle body with a light transmittance detector. The light transmittance of high-quality AS vacuum bottles should not be less than 85% to ensure that the state of the cosmetics inside the bottle can be clearly displayed;
Pump Head Service Life Test: Simulate the daily use frequency of consumers, conduct a continuous pressing test on the pump head (usually required to reach more than 5000 times), and check whether the pump head is stuck or the liquid output changes during the test, to ensure that the pump head functions stably within the product service cycle (usually 3-6 months).
(2) Chemical Safety Inspection: Eliminating the Risk of Harmful Substances
AS vacuum bottles are in direct contact with cosmetics, so their chemical safety is crucial. Professional testing is required to eliminate the risk of harmful substance precipitation. The main inspection items include:
Heavy Metal Test: According to the national "Cosmetic Safety Technical Specification", test the content of heavy metals such as lead, mercury, arsenic, and cadmium in the bottle body material, requiring the total content of heavy metals to not exceed 10mg/kg, to prevent heavy metals from penetrating into the human body through cosmetics;
Volatile Organic Compounds (VOC) Test: Use a gas chromatography-mass spectrometer (GC-MS) to test the content of volatile organic compounds released by the AS vacuum bottle under specific conditions (such as high-temperature storage), ensuring that the VOC emission meets the relevant environmental protection and safety standards, and avoiding odor affecting the use experience of cosmetics or causing irritation to the human body;
Migration Test: Soak the AS vacuum bottle in a solvent simulating cosmetics (such as a mixture of ethanol and glycerin), place it at a specific temperature (40℃) for 10 days, and then test the content of AS material migrates in the solvent, ensuring that the migration amount is within a safe range and does not react adversely with cosmetic ingredients.
(3) Functional Performance Inspection: Ensuring User Experience and Effect
Functional performance inspection focuses on the core functions of AS vacuum bottles - vacuum sealing and precise liquid output. The key inspection items include:
Sealing Test: Fill the AS vacuum bottle with liquid and seal it, place it upside down for 24 hours, and observe whether there is liquid leakage; at the same time, use a vacuum degree detector to measure the vacuum degree inside the bottle. During the product shelf life, the vacuum degree inside the bottle should remain stable without obvious decline, to prevent external air from entering and causing oxidation and deterioration of the
