II. RoHS Hazardous Substance Restrictions: When Hygiene Products "Encounter" Electronic Components
RoHS (Restriction of Hazardous Substances Directive) was originally designed for electronic and electrical equipment, but its regulatory logic has increasingly permeated broader product categories in recent years. RoHS restricts the use of lead, cadmium, mercury, hexavalent chromium, PBBs, PBDEs, and four phthalates (DEHP, DBP, BBP, DIBP), with a limit of 0.1% per homogeneous material.
Why is RoHS relevant to hygiene products? The answer lies in the growing prevalence of electronic functional components. Many premium Sanitary Pads and diapers now integrate smart sensors — for moisture detection, change-time reminders, and more. These electronic components themselves must comply with RoHS, and the associated packaging materials, conductive inks, and flexible circuits are subject to the same restrictions. Even for traditional hygiene products without electronic functions, upstream suppliers who also serve the electronics industry often "backward-transmit" RoHS control standards into their material systems to streamline supply chain management.

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Sanitary Napkin
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