Automotive Interior – Polyurethane Adhesive

1. Core Characteristics

Table 1: Basic Physical Properties

2. Application-Specific Formulations

Table 2: Adhesive Types by Interior Component

3. Performance Comparison

Table 3: PU vs Alternative Interior Adhesives

4. Manufacturing Requirements

Surface Preparation:

• Plasma treatment for plastics
• Solvent wiping for metals
• Light abrasion for textiles

Application Methods:

• Robotic dispensing
• Roll coating
• Spray application
• Bead extrusion

Curing Conditions:

• Temperature: 20-80°C
• Humidity: 40-70% RH
• Pressure: 0.1-0.5 MPa

5. Automotive Standards Compliance

6. Recent Technological Advances

• Low-VOC formulations meeting global emission standards
• Fast-cure systems for production line efficiency
• Thermal-conductive grades for EV battery components
• Self-healing versions for long-term durability
• Bio-based polyols for sustainable solutions

7. Processing Guidelines

8. Failure Prevention

Common Issues:

• Bubble formation (control humidity)
• Poor wetting (ensure surface energy >36 dynes/cm)
• Delamination (verify substrate compatibility)
• Cure inhibition (avoid silicone contamination)

Quality Control Measures:

• Rheology testing
• FTIR verification
• Lap shear testing
• Accelerated aging tests