A filter works by bringing many components together precisely: media, pleats, frame and gasket. The adhesive that holds them together affects both performance and service life.
Main applications
Pleat fixing: thin hot melt beads keep pleat spacing so pleats don't stick together and airflow stays even.
Frame bonding: sealing the pleat pack into a plastic, board or metal frame. Any air leak directly reduces efficiency.
Activated carbon lamination: laminating the odour- and gas-absorbing carbon layer to the carrier without blocking pores, using spray or fibre patterns.
Gasket and foam bonding: fixing sealing gaskets to filter edges.
Selection criteria
| Criterion | Why it matters |
|---|---|
| Heat resistance | Engine filters see high temperatures |
| Low fogging and odour | Passenger comfort in cabin filters |
| Fast setting | High-speed pleating lines |
| Media compatibility | Paper, synthetic and nano-fibre behave differently |
| Open pores | Air permeability must be kept in lamination |
Recommended systems
- PO hot melts: high heat resistance, low odour and fogging; for pleating and frames.
- CoPA hot melts: industrial filters needing very high service temperature and chemical resistance.
- PUR hot melts: permanent bonds in filters working in humid conditions.
- PSA: fast assembly of gaskets and accessories.
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