Hot Melt Adhesive
Direct Answer
Hot melt adhesive is the invisible glue of hygiene products — thermoplastic adhesive applied molten that bonds topsheets, cores, backsheets, elastics and tabs the moment it cools.
Key Takeaways
- Hot melt adhesive is a thermoplastic glue applied molten that bonds diaper and pad layers instantly on cooling, used for structure, elastics and tabs.
- Chemistry: Thermoplastic polymers (SBC/EVA-based) + tackifiers + wax
- Application: Applied molten at 130–180°C, bonds on cooling
- Patterns: Slot die, spiral, spray, multi-dot
Material Properties
| Property | Typical Value | Note |
|---|---|---|
| Chemistry | Thermoplastic polymers (SBC/EVA-based) + tackifiers + wax | Formulated for hygiene-grade bonding |
| Application | Applied molten at 130–180°C, bonds on cooling | Open time and setting speed matter on line |
| Patterns | Slot die, spiral, spray, multi-dot | Pattern choice balances bond vs breathability |
| Functions | Structure lamination, elastic attachment, tab/tape fixing | Replaces sewing and most mechanical fastening |
| Cost factor | Glue coating weight (GSM) is a major unit-cost driver | Optimized patterns save adhesive and money |
Applications
- Laminating topsheet/ADL/core/backsheet
- Attaching leg and waist elastics
- Fixing fastening tabs and tapes
- Sealing and assembly in pads and diapers
Key Manufacturers & Suppliers
- Major adhesive producers (e.g., H.B. Fuller, Henkel, Bostik)
- Regional hygiene-adhesive formulators
Supplier lists reflect commonly cited industry names, not endorsements. Always verify current supply arrangements directly.
Safety Notes
Hygiene-grade hot melt adhesives are formulated for skin contact and are widely used inside products without direct skin exposure. Odor, yellowing and residue are controlled by formulation and coating weight.