Hot Melt Pressure Sensitive Adhesive (HMPSA) is a thermoplastic adhesive that becomes fluid when heated and forms an instant bond when pressure is applied after cooling. Unlike solvent-based adhesives, HMPSA contains 100% solid content, making it cleaner, more efficient, and environmentally friendly.
In hygiene product manufacturing, HMPSA plays a critical role in assembling multiple layers of materials together while maintaining softness, flexibility, and user comfort.
It is widely used in:
- Baby diapers
- Sanitary napkins
- Panty liners
- Adult incontinence products
- Medical disposable pads
Product Structure and Working Principle
HMPSA is typically formulated with:
- Synthetic rubber or SIS/SBS polymers
- Tackifying resins
- Plasticizers
- Antioxidants
When heated inside the glue machine:
- The adhesive melts into liquid form.
- It is sprayed or coated onto substrates.
- After cooling, it quickly develops tack and bonding strength.
- The bonded materials remain flexible and durable.
This process allows manufacturers to achieve fast, continuous, and automated production.
Main Applications in Hygiene Products
1. Baby Diapers
HMPSA is extensively used in diaper construction.
Typical bonding areas:
- Core fixation
- Nonwoven lamination
- Elastic attachment
- Leg cuff bonding
- Frontal tape positioning
- Backsheet construction
Performance requirements:
- Strong adhesion
- Soft hand feel
- Excellent elasticity retention
- Heat resistance
- Stable performance during high-speed production
The adhesive must maintain bonding even when diapers are stretched, folded, or exposed to body movement.
2. Sanitary Napkins
In sanitary napkins, HMPSA is used for:
- Wing bonding
- PE film lamination
- Positioning adhesive
- Release paper bonding
- Core construction
Key requirements:
- Skin-friendly performance
- Low odor
- Clean peel behavior
- Good tack performance
- No adhesive leakage
The adhesive must provide secure fixation while remaining comfortable and discreet during use.
3. Adult Incontinence Products
Adult care products require stronger and more durable bonding because:
- Product size is larger
- Usage duration is longer
- Absorption capacity is higher
HMPSA provides:
- Reliable structural bonding
- Elastic attachment stability
- Long-lasting adhesion
- Comfortable flexibility
Professional Hot Melt Adhesive Solutions
-------- JCC Tianyang Group
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