Jin Yu Plastic Packaging: What is a foam bottle? How does it work?
Jin Yu Foam Bottle, officially known as a foam pump bottle, is a plastic packaging container that integrates foaming functionality. It consists of two core components: a PET plastic bottle body and a pp foam pump dispenser.
It is mainly used in fields such as facial cleansers, hand sanitizers, mousse skincare products, and kitchen and bathroom cleaning supplies. Its core advantage lies in the fact that there is no need for manual rubbing; simply pressing can squeeze out fine and uniform foam. This not only enhances the convenience of use but also precisely controls the product dosage. At the same time, it is compatible with a refillable design, aligning with the trend of eco-friendly packaging.
I. Core Structure Components
The foam pump is the key component for achieving the foaming function of the foam bottle. Its precise structure determines the foaming effect. The core components include:
Pressing head: The end subjected to external force, controlling the opening and resetting of the pump body, and serving as the foam outlet.
Power component (piston + spring): The power source for the pump operation, responsible for the compression and rebound of the pump chamber, creating a pressure difference to drive the flow of gas and liquid.
One-way valve system (suction one-way valve + intake one-way valve)
Suction one-way valve: Controls the unidirectional entry of the original liquid into the pump chamber, preventing backflow;
Intake one-way valve: Controls the unidirectional intake of external air, preventing air leakage or liquid backflow.
Gas-liquid mixing chamber: The core reaction area for the initial mixing of gas and liquid, storing the absorbed original liquid and air.
Foaming net (foaming core): The key component for foaming, with a pore diameter typically ranging from several tens of micrometers, using shear action to disperse the gas-liquid mixture into tiny bubbles.
Suction tube: Connects the original liquid in the bottle to the pump chamber, responsible for transporting the liquid raw materials.
II. Working Principle (Pressure Difference-driven Gas-Liquid Mixed Shear Foaming)
The operation of the foam bottle is based on the principle of pressure difference and unidirectional flow of gas and liquid combined with shear mixing. It achieves continuous foaming through the "pressing - rebound" cycle. The complete process is divided into four stages:
1. Standby state
The spring is in a naturally stretched state, the piston is reset, and the pump chamber is in a constant pressure environment; the suction liquid one-way valve and the intake air one-way valve are both closed; the suction tube is submerged in the original liquid in the bottle, waiting for activation.
2. Pressing compression + gas-liquid mixing stage
When the pump head is pressed down, the spring is compressed, the piston squeezes the pump chamber space, causing a sudden increase in pressure inside the chamber:
The suction liquid one-way valve and the intake air one-way valve are tightly closed under the pressure effect, preventing the original liquid from flowing back and the air from leaking out;
The pre-stored gas-liquid mixture in the pump chamber is compressed and flows towards the foaming net.
3. Shear foaming stage
Under high pressure, the gas-liquid mixture passes through the micro-pores of the foaming net at high speed. Under the shear and dispersion effect of the micro-pores, the mixture is divided into countless uniform tiny bubbles, and finally squeezes out a fine and dense foam from the liquid outlet of the pressing head.
4. Rebound suction and intake stage
After releasing the pressing head, the rebound force of the spring drives the piston to rise and reset, and the pump chamber forms a negative pressure:
The outside air is sucked into the pump chamber through the intake air one-way valve;
The original liquid in the bottle is pushed open by the suction liquid one-way valve under the negative pressure and enters the pump chamber through the suction tube;
The air and the original liquid complete the preliminary mixing in the mixing chamber, preparing for the next pressing foaming.
III. Key Factors Affecting Foaming Effect
The fineness and stability of the foam are not only dependent on the precision of the pump body structure, but also closely related to the formulation of the raw material solution:
Foam pump bottles are more suitable for products with low viscosity and water-based formulations. Such raw materials have good fluidity and are easy to be fully mixed with air;
If the raw material is too viscous, it will lead to uneven gas-liquid mixing, resulting in rough foaming, no foaming or easy dissipation of foam.
Jinyu plastic packaging foam pump bottles can be customized in specifications, and can be tailored to the formulation characteristics, capacity requirements and brand design style of different industry customers, to create personalized plans for pump body diameter, bottle material, appearance design, etc., to meet the packaging needs of various products such as cleansing, hair care, cleaning, etc., and help brands achieve a dual upgrade in packaging function and appearance level.
https://www.jinyuplasticbottle.com/contact-us