Hot Melt Pressure Sensitive Adhesive (HMPSA) for Baby Diapers

Hot Melt Pressure Sensitive Adhesive (HMPSA) for baby diapers is a premium synthetic rubber-based adhesive specifically designed for disposable hygiene products (Nonwovens). Engineered to cater to a baby’s delicate skin, high mobility, and frequent diaper changes, this product delivers an optimal balance of low odor, high peel strength, excellent flexibility, and superior thermal stability.

Core Applications

In automated, high-speed baby diaper production lines, HMPSA plays a critical role in bonding and securing various components:

• Construction Adhesive: Applied for multi-layer lamination of nonwoven fabrics, PE breathable backsheets, and absorbent cores (SAP/fluff pulp), providing persistent bond strength and leak-proof barriers.

• Elastic / Leg Cuff Adhesive: Used to fix elastic threads in leg cuffs and waistbands. Features exceptional anti-creep resistance to ensure a snug, leak-proof fit that moves comfortably with the baby without pinching or leaving marks.

• Tape / Positioning Adhesive: Formulated for frontal and side tapes, maintaining stable tackiness and holding power even after repeated peeling and repositioning.

Key Advantages

1. Superior Safety & Low Odor Profile

• Pure & Odor-Free: Formulated with hydrogenated resins and high-purity polymers, resulting in ultra-low VOC (Volatile Organic Compounds) levels and minimizing unpleasant odors upon opening the packaging.

• Biocompatible: Passed skin sensitization and irritation tests; free from heavy metals, fluorescent agents, and phthalate plasticizers, ensuring gentle care for sensitive infant skin.

2. Exceptional Bonding Strength & Anti-Creep Performance

• High Initial Tack & Peel Strength: Demonstrates strong affinity for hard-to-bond substrates like PE films and PP nonwovens, maintaining reliable bonds even in moist conditions.

• Anti-Elastic Creep: Achieves an elastic creep rate below 5% at body temperature (37°C) under continuous tension, preventing diaper leakage or elastic snaps caused by adhesive detachment.

3. Outstanding Processing Adaptability

• High Thermal Stability: Exhibits no discoloration, charring, or viscosity degradation during prolonged heating in melt tanks, significantly reducing equipment maintenance costs.

• Versatile Application Methods: Suitable for high-speed application methods—including spiral spray, slot coat, multi-bead, and atomized spray—at line speeds ranging from 600 to 1,000 pieces per minute.

Technical Specifications (Typical Properties)

Note: Specifications can be customized based on your machine type (Nordson, ITW Dynatec, Robatech, etc.) and line speed requirements.

Usage & Storage Recommendations

Best Practice Tips:

• Equipment Cleaning: Flush dispensing systems with a dedicated hot melt cleaning compound prior to initial use or when switching adhesives to prevent cross-contamination and incompatibility.
• Storage Conditions: Store in original packaging in a cool, dry, well-ventilated area below 35°C. Keep away from direct sunlight and excessive weight. Shelf life is 24 months under recommended conditions.