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Film Technology in Sanitary Pads and Absorbent Pads: The Key to Comfort and Safety
Release time:
Jun 11,2026
The core functionality of sanitary pads and absorbent pads (including baby and adult diapers) relies heavily on various film materials. From leak-proofing and breathability to antibacterial properties and biodegradability, film technology directly determines the user experience.
I. Classification of Core Film Materials
Backsheet films: PE breathable film (WVTR ≥ 1000; leak-proof yet breathable), PE cast film (low cost but poor breathability), and composite film (non-woven fabric + breathable film; for high-end products).
Top-layer related films: Release film/paper (for adhesive strips; release force 2–30g) and fluid-distribution film (accelerates liquid dispersion).
Functional films: Wetness indicator film (changes color upon contact with urine), antibacterial film (inhibition rate ≥ 99%), and biodegradable film (PLA/PHA).
Packaging films: Individual packaging film (PE/PET; heat-seal strength ≥ 2.0N) and outer carton film (BOPP; puncture-resistant).
II. Key Performance Indicators of the Film
Physical: Thickness deviation within ±2μm; longitudinal tensile strength > 5.0N.
Functional: WVTR > 1000 g/(m²·24h); hydrostatic pressure ≥ 500mmH₂O.
Safety: No fluorescent whitening agents; heavy metals < 0.1mg/kg; compliant with GB 15979-2024.
Processing: Wetting tension ≥ 36mN/m; roll end-face misalignment ≤ 3mm.
III. Purchasing and Application Recommendations
Consumers: Prioritize breathable films and products with safety certifications; those with sensitive skin should avoid films containing fragrances or pigments.
Manufacturers: Strictly control raw materials (medical-grade PE/PLA), optimize pore-forming processes, and align with environmental standards.
IV. Industry Trends
Biodegradable film penetration rate reached 38.9% in 2024 and is projected to exceed 60% by 2030.
Closed-loop recycling, functional integration, and intelligent manufacturing. Film technology is the core driving force behind the upgrading of personal care products. In the future, film materials that offer greater comfort, safety, and sustainability will lead the industry's development.
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