Airless Lotion Bottle Manufacturers

How does the spring reset system of the Airless Lotion Bottle achieve 1-second precise liquid locking?

In the field of cosmetic packaging, the airless lotion bottle has become the first choice for mid-to-high-end skin care product packaging due to its strong sealing, pollution isolation, and efficient access. As one of the core technologies of the vacuum bottle, the performance of the spring reset system directly determines the product's liquid locking accuracy and user experience. With more than ten years of technical accumulation, Yuyao Dietian Packaging Co., Ltd. has innovatively developed a spring reset system for precise liquid locking in 1 second, pushing the functionality and reliability of vacuum bottles to a new height. This article will analyze this breakthrough from three aspects: technical principles, structural design, and market value.
1. The core principle of the spring reset system: vacuum negative pressure and mechanical balance
The spring reset system of the vacuum bottle needs to meet two core requirements: one is to prevent the contents from contacting with the air through the vacuum negative pressure environment to prevent oxidation and secondary pollution; the second is to achieve precise liquid locking through the mechanical structure to ensure that the liquid in the bottle has "zero residual reflux" after each press.
Yuyao Dietian adopts a double-track spring + one-way valve structure design, and realizes an efficient cycle of "press and reset" by precisely calculating the elastic coefficient of the spring and the movement trajectory of the piston. When the user presses the pump head, the spring is compressed, and the piston in the bottle rises synchronously to squeeze out the contents; at the moment of release, the spring quickly resets within 1 second, pushing the piston downward, and at the same time forming a vacuum negative pressure in the bottle, cooperating with the closing action of the one-way valve to completely block the liquid reflux channel. This dynamic balance mechanism not only avoids the "hanging on the wall" problem of traditional lotion bottles, but also controls the residual amount to less than 0.1%.
2. Technical breakthrough point: collaborative innovation of precision, materials and processes
To achieve 1 second precise liquid locking, three major technical difficulties need to be overcome:
Spring precision control
Yuyao Dietian Packaging Co., Ltd. uses high-precision stainless steel springs, which are customized by CNC machine tools to ensure that the elastic modulus error is ≤2%. The optimized design of the spring diameter and number of turns enables it to withstand the fatigue stress of frequent pressing and maintain a long-term stable rebound speed.
Piston sealing structure
The piston is made of a double-layer composite material of food-grade silicone and PP (polypropylene), combined with a laser-engraved micron-level guide groove, which not only improves the fit with the bottle wall, but also reduces friction resistance. This design increases the piston reset speed by 40%, while ensuring that there is no leakage after 100,000 press tests.
Intelligent pressure relief valve integration
In view of the fluidity differences of high-viscosity liquids (such as essences and creams), Yuyao Ditian has built-in micro pressure relief valves in the spring system. When the pressure in the bottle rises abnormally, the pressure relief valve automatically opens to adjust the air pressure to avoid liquid injection or liquid lock failure caused by pressure imbalance, ensuring user operation safety.
3. Market value: Redefining cosmetic packaging standards
Yuyao Ditian's spring reset system not only solves the industry pain points, but also provides multiple advantages from the perspective of user experience and brand value:
Ingredient preservation upgrade
The 1-second liquid lock technology shortens the contact time between the contents and the air by 80%, especially for easily oxidized active ingredients such as vitamin C and retinol, extending the shelf life of the product after opening.
Environmental protection and cost optimization
By reducing liquid residue, the utilization rate of a single bottle is increased by 15%-20%. With the detachable design, users can easily replace the liner, reducing the cost of repeated packaging purchases, which is in line with the trend of green consumption.
Brand differentiation empowerment
Precise liquid lock technology combined with the company's independently developed hot stamping and three-dimensional printing processes gives the packaging "function + aesthetics" dual competitiveness, helping the brand to establish a technical barrier in the high-end market.