Microfibrillated Cellulose Wet Sheet for Flushable Wet Strength

The patent changes the fiber composition parameter by using 100% wood pulp fibers instead of synthetic blends, and controls the grammage parameter at 10-50 g/m² to optimize the balance between wet strength and disintegration properties. The wet strength is achieved through hydrogen bonding between fibers during the wet-laid process, while the low grammage ensures easy disintegration in sewage systems.

The patent extracts and removes harmful preservatives like methylchloroisothiazolinone from the wet wipe formulation. Instead, it relies on the inherent antimicrobial properties of the wood pulp fibers and the controlled moisture content to prevent microbial growth, thereby eliminating skin irritation while maintaining microbial stability.

The patent changes the fiber morphology parameter by using highly refined, fibrillated wood pulp fibers that create a more open, porous network structure. This structure naturally retains moisture through capillary action and hydrogen bonding, eliminating the need for additional moisture-retention additives while maintaining high production efficiency through the conventional wet-laid process.

The patent creates a highly porous material structure through the wet-laid process using fibrillated fibers, achieving a porosity of 60-80%. This porous network provides extensive surface area for liquid absorption while maintaining a thin, soft profile. The absorbency comes from the large surface area and capillary action in the pores, not from increased bulk or grammage.