Water-soluble film, typically made from polyvinyl alcohol (PVA), is made from materials such as [specific materials], and its characteristic is that it can rapidly dissolve in water at a specific temperature, releasing its contents. This packaging form eliminates the need for unwrapping—simply place it directly into water—reducing the use of plastic packaging, making it convenient and environmentally friendly. However, the stability of water-soluble films is significantly influenced by the pH impact of their contents. PVA film is most stable under neutral or weakly alkaline conditions. If the cleaning product formulation is strongly alkaline (such as certain drain cleaners) or strongly acidic (such as toilet bowl cleaners), it may accelerate the dissolution of the water-soluble film, leading to packaging damage during storage. Therefore, products packaged with water-soluble film require formulations where pH needs to be precisely controlled within an appropriate range.

During the cleaning process, pH value and surfactant have a synergistic effect. For instance, in the case of oily stains, alkaline conditions (pH > 7) help to saponify oils and fats, producing water-soluble fatty acid salts that break down heavy grease. At this stage, combining it with alkali-resistant surfactants (such as short-chain alkyl polyglycosides) can further emulsify the residual grease after saponification, achieving deep cleaning. Research reports indicate that certain surfactants remain stable even in high-temperature, strongly alkaline environments and effectively reduce the surface tension of the solution, enhancing penetration and emulsification effects.

This kind of "Material (Water-Soluble Film)—Formula (pH with surfactants)—Performance (Cleaning Efficiency)" collaboration reflects the evolution of household cleaning products toward greener and more precise solutions. By designing neutral or weakly alkaline formulas compatible with water-soluble films and selecting highly effective, biodegradable surfactants, companies can not only deliver powerful cleaning products but also contribute to reducing plastic packaging and carbon footprints. This approach aligns with global carbon reduction initiatives and offers better choices for environmentally conscious consumers.