Acrylic tape replacing screws in car interior assembly
Double-sided acrylic tape is gradually replacing screws and plastic clips in the assembly of automotive interior trim. This solution reduces the number of screw points, minimizes rattles and significantly shortens assembly time on the line.
A vehicle has dozens of trim parts: door panels, pillar trims, dashboard moldings and armrest console panels. Each screw point means one operation, one drilled hole in the part and one potential source of vibration. Acrylic foam tape distributes the load evenly along the entire length of the part instead of concentrating it at a few points.
Advantages of acrylic tape
- The elastic acrylic foam core absorbs vibration and reduces squeak noise.
- No drilling required, for a seamless, more attractive finished surface.
- Seals gaps, keeping out dust and water at the bonded area.
- Withstands temperatures from -40°C to 90°C, suitable for cabin conditions.
Screws versus tape
| Criterion | Screws, plastic clips | Acrylic tape |
|---|---|---|
| Assembly time per part | 20–40 seconds | 8–15 seconds |
| Load distribution | Concentrated at points | Even across the entire surface |
| Noise, vibration | Prone to occur when loosened | Well absorbed |
| Appearance | Exposed screw heads or covers needed | Seamless |
| Removal for repair | Easy | Requires special tools |
Application notes
Interior trim parts are usually made of talc-filled PP or ABS, and PP is a low surface energy substrate. Choose a tape with a modified adhesive for PP or use a primer. Application pressure should reach about 100–150 kPa for a few seconds, and the part temperature should be no lower than 15°C during bonding.
For parts that bear loads or are likely to be pulled during use, tape can be combined with a few locating pins to provide both secure holding and easy alignment.
Acceptance testing
Common tests include peel strength after heat aging, damp heat cycling and static load holding at 80°C. Results must meet each automaker's internal standards.
For a successful conversion, start with a few low-risk parts such as decorative moldings or pillar trims, evaluate them thoroughly and then expand. Workers also need training on removing the liner, positioning and applying even pressure, since unlike screws, tape cannot be readjusted once applied. Locating fixtures and rollers with a fixed pressing force help keep quality consistent across shifts.
AMS can die-cut tape to the exact contour of each part, with pull tabs so workers can apply it quickly on the line.
To receive acrylic tape samples for interior trim parts, please contact AMS Vietnam.
