Baby Diaper
Baby Pull Up Pants
Adult Diaper
Sanitary Napkin
Wet Wipes
Tissues Paper
Disposable Cotton Soft Towel
Pet Diaper
II. Wet Strength Requirements Across Different Applications — The Spectrum from "Instant-Disperse" to "Firm"
Different application scenarios have vastly different wet strength requirements.
Toilet paper is designed with a philosophy of "just strong enough to use, but quick to disperse." Its wet strength target is not "never tear" but "moderate" — ensuring it won't easily rupture during wiping, causing embarrassment, yet quickly disintegrating under the agitation and dilution of toilet flushing to avoid pipe blockages. Consequently, the wet strength of toilet paper is generally kept at a relatively low level, with a wet tensile strength retention rate (the ratio of wet strength to dry strength) typically falling between 15% and 25%. Excessive wet strength enhancement would instead cause fibers to fail to break apart and form tangled clumps, increasing the risk of sewer blockages. Modern wastewater treatment systems have clear requirements for the dispersibility of toilet paper — typically specifying that the paper should break down into small fragments within minutes under static or mild agitation conditions.
Kitchen Paper Towels and hand towels operate on a completely opposite wet strength philosophy, pursuing the principle of "stronger when wet." Kitchen towels need to wipe down wet countertops, absorb meat juices, and even withstand scrubbing under some pressure. Their wet tensile strength retention rate is typically designed at 40%–60% or even higher. To achieve this goal, these products typically employ higher PAE addition rates (up to 2.0%–3.0%), combined with long-fiber softwood pulp (which experiences less wet strength loss) and specific creping processes (which increase extensibility in the machine direction), allowing them to maintain structural integrity under repeated wetting and mechanical stress. Some premium kitchen towels also incorporate a dual "wet strength + wet bulk" technology that increases sheet thickness after wetting, enhancing both absorbent capacity and cleaning efficiency.