How does BOV-S4.00 achieve "zero emission" of aerosol VOCs through triple mechanisms?

Traditional aerosol packaging has long relied on liquefied petroleum gas (LPG) or dimethyl ether (DME) as propellants, and its volatility and reactivity lead to two core problems:
VOCs emission pollution: propellants continue to volatilize during storage, transportation and use, forming organic pollutants mainly composed of hydrocarbons, aggravating ozone layer destruction and haze generation;
Content stability risk: mixed storage of propellants and active ingredients is prone to oxidation, hydrolysis or catalytic reactions, causing product deterioration or even failure.

BOV-S4.00 valve bag valve on valve aerosol valve (hereinafter referred to as "BOV-S4.00") provides a systematic solution for the industry through nitrogen drive and structural innovation.

Mechanism 1: Nitrogen inert environment - blocking VOCs release from the root
1. Theoretical basis of nitrogen chemical inertness
Nitrogen (N₂) is a diatomic gas with a stable molecular structure. Its chemical bond energy is as high as 945 kJ/mol, which is much higher than the 300-400 kJ/mol of hydrocarbons. In the BOV-S4.00 system, nitrogen is the only propellant, completely replacing the flammable and explosive organic solvents in traditional aerosols. Its core advantages include:

Zero VOCs emission: Nitrogen itself does not contain carbon elements and will not produce any organic volatiles during the life cycle of the aerosol;
Temperature stability: The critical temperature of nitrogen is -147°C. Even in extremely high or low temperature environments, it remains in a gaseous state and does not liquefy, avoiding pressure fluctuations caused by phase changes.

2. Nitrogen-driven process realization
BOV-S4.00 BOV valve bag on valve aerosol valve with tinpalte cup for aluminium can adopts "pre-filled nitrogen + pressure balance" technology:
Pre-filled nitrogen: Before the aluminum foil bag is packaged, nitrogen is injected through high-precision filling equipment to ensure that the initial pressure in the bag matches the product characteristics;
Pressure balance valve: The valve body has a built-in micro pressure sensor to monitor the nitrogen pressure in the bag in real time. When the user presses the nozzle, nitrogen pushes the contents through the precision channel and automatically closes after the injection is completed to prevent gas leakage.

3. Industry value of nitrogen inert environment
Safety compliance: Eliminate the risk of propellant explosion and make aerosols comply with the International Air Transport Association (IATA) dangerous goods transportation standards;
Cost optimization: Nitrogen has a wide range of sources (air separation technology), the cost is only 1/5 of traditional propellants, and no special storage conditions are required.

Mechanism 2: Content closure - Precision barrier between aluminum foil bag and valve body
1. Material science and structural innovation of aluminum foil bag
The aluminum foil bag of BOV-S4.00 adopts a multi-layer composite structure:
Outer layer: high-strength polyester (PET) film, providing puncture resistance and heat resistance;
Middle layer: aluminum foil layer, with a thickness of 12μm, and better barrier properties than the inner wall coating of traditional aluminum cans;
Inner layer: food-grade polyethylene (PE) coating to ensure content compatibility.
This structure achieves seamless connection between the bag body and the valve body through heat sealing process to form a fully closed system.

2. Collaborative design of valve body and aluminum foil bag
As the core component of BOV-S4.00, the valve body has the following innovations:
Dual-channel design: independent nitrogen channel and content channel to avoid cross contamination;
Self-sealing nozzle: using silicone sealing ring to form an airtight barrier in non-spraying state;
Tinplate cup base: as the connector between the valve body and the aluminum can, its surface tin plating can prevent the contents from corroding the can body.

3. Experimental verification of content sealing
Verified by accelerated aging test (40°C/75%RH, 12 months):
Zero leakage rate: No leakage of content or nitrogen was detected at the connection between the aluminum foil bag and the valve body;
Content stability: Compared with traditional aerosols, the active ingredient retention rate of emulsion products packaged by BOV-S4.00 is increased by 20%.

Mechanism 3: Pressure stabilization technology - zero residual propellant leakage during the injection process
1. Gas ratio and injection control
The pressure stabilization technology of BOV-S4.00 is based on the following principles:
Initial pressure setting: According to the viscosity of the content and the injection requirements, the pre-filled nitrogen pressure range is 0.5-1.2 MPa;
Dynamic adjustment: The pressure compensation cavity inside the valve body can balance the pressure changes in the bag to ensure a constant injection flow;
Injection termination mechanism: When the pressure in the bag drops to the threshold, the valve body automatically locks to prevent nitrogen residue.

2. Fluid dynamics analysis of the injection process
Through CFD (computational fluid dynamics) simulation, it is shown that:
Single-phase flow injection: nitrogen and contents form laminar flow in the valve body channel, avoiding the instability of two-phase flow in traditional aerosols;
Residual rate tends to zero: after the injection, the residual nitrogen in the bag is less than 0.1%, which is much lower than the 5%-10% of traditional aerosols.

3. Industry breakthrough in pressure stabilization technology
Improved user experience: constant injection pressure and uniform product atomization effect;
Enhanced environmental benefits: each can of aerosol reduces the emission of about 15g of propellant, and based on an annual output of 1 billion cans, it can reduce VOCs by 15,000 tons.