Baby Diaper
Baby Pull Up Pants
Adult Diaper
Sanitary Napkin
Wet Wipes
Tissues Paper
Disposable Cotton Soft Towel
Pet Diaper
3. Folding Alignment Offset
The folding and cutting of Wet Wipes on the production line require highly precise mechanical registration. Folding offset refers to alignment errors between layers after folding exceeding standard requirements. Common manifestations include: centerline shift in Z-fold configurations, uneven layer edges, etc. Such deviations typically originate from mechanical wear on folding components or air pressure fluctuations in pneumatic systems. Wet Wipes with folding offset may experience sticking or difficulty in single-sheet dispensing when extracted from the pack, but the effective cleaning area and liquid content per sheet remain unchanged. This downgrade reason is purely a convenience issue and involves no functional defect.
4. Packaging Seal Strength Variation
The seal integrity of wet wipe packaging is critical for maintaining constant moisture levels and microbial safety throughout the shelf life. During the heat-sealing stage, minor fluctuations in sealing temperature, pressure, and dwell time may cause seal strength to deviate from the standard central value. Internal control standards are typically stricter than national requirements—even if seal strength fully meets the national standard of ≥10 N/15mm, if it falls short of the factory's higher internal targets, the batch may still be downgraded to Grade B. Such products remain fully reliable under normal storage and shipping conditions; only under extreme conditions (such as high-temperature, high-pressure stacking) would their tolerance be marginally lower than Grade A.
5. Summary
The Grade B downgrade reasons for Wet Wipes—substrate basis weight deviation, liquid content tolerance variation, folding alignment offset, and packaging seal fluctuation—share a common characteristic: all deviations remain within safe limits and affect only product consistency, aesthetics, or ease of use—never cleaning functionality or hygiene safety. For bulk purchasers supplying non-sensitive scenarios (such as industrial cleaning, public facility supplies, etc.), the practical impact of these downgrade factors is extremely limited. Professional suppliers should clearly disclose the specific downgrade category when offering Grade B Wet Wipes, enabling purchasers to make informed decisions based on their actual usage scenarios.