A comprehensive technical guide on raw material specifications for sanitary napkin manufacturing, covering non-woven fabric GSM, SAP absorption retention, breathable backsheet PE films, and hot-melt adhesive compatibility.
Setting up a cost-effective and high-speed sanitary pad manufacturing line requires a precise understanding of raw material properties. Inconsistent material quality leads to frequent line stoppages, increased reject rates, and sub-par product absorption.
Core Raw Materials & Technical Specifications
Hydrophilic Non-Woven Fabric (Top Sheet)
Recommended Weight: 15–20 GSM.
Key Properties: Ultra-soft texture, rapid strike-through speed (fluid penetration < 3 seconds), and minimal liquid re-wet for dry skin contact.Super Absorbent Polymer (SAP) & Fluff Pulp (Core):
Material Type: Sodium polyacrylate SAP combined with treated softwood fluff pulp (or integrated SAP composite paper).
Absorption Ratio: Free swell capacity > 45 g/g; retention capacity under pressure (0.7 psi) > 25 g/g.
Airlaid Paper & ADL (Acquisition Distribution Layer):
Purpose: Ensures uniform distribution of fluid along the pad core to prevent edge leakage and spot saturation.
Recommended Weight: 40–50 GSM for Airlaid; 20–25 GSM for ADL.
Breathable PE Backsheet Film (Bottom Barrier):
Recommended Weight: 18–24 GSM.
Key Properties: Microporous structure allowing vapor transmission (breathability) while remaining 100% impermeable to liquids.
Hot-Melt Adhesives (Construction & Positioning):
Application: High-tack positioning glue for underwear adhesion (peel strength tested) and low-temperature elastic/structure glue for component bonding.