1. Promote adhesive hardening through heat preservation aging, improve composite strength and heat resistance of composite film.
2. Choose the best heat sealing conditions or improve the heat sealing method according to the composition of the composite film and the heat sealing state, and cool down immediately after the heat sealing.
3. Check the shelf life and preservation conditions of the heat-sealing film. Pay special attention if the heat-sealing film is old batch number and the heat-sealing treated film.
4. Increase the thickness of the heat sealing film.
5. Change the type and grade of the heat sealing film, and use the inner sealing film with anti-pollution heat sealing property.
6. Check whether the grade of the adhesive meets the requirements.
7. Improve the thermal sealing performance of the heat sealing layer, control the content of slipper, and use MLLDPE film.
8. Control the monomer content of MDI in the composite adhesive.
9. Check the handling degree of the hot cover.
