After standing at 24~30℃ for 24h, the bonding will be firm. The bonding steps are as follows: (1) Preparation of treatment solution: Add a certain amount of sodium metal to the solution of tetrahydrofuran and naphthalene, the mass fraction of sodium metal is controlled at 3%~5%, and stir at room temperature for about 2h until the color of the solution is dark brown or Black (2) Immerse the PTFE workpiece to be processed into the solution for about 5-10 minutes, take it out and soak it in acetone solution for 3-5 minutes;

Take out the workpiece from the acetone solution, rinse it with clean water, and place it in a dark place to dry naturally; (4) Choose epoxy resin, silicone or polyurethane as the adhesive, evenly spread on the treated surface to be bonded and bond immediately.

These groups can increase the surface energy, reduce the contact angle, improve the wettability, and change from difficult to sticky to sticky.The sodium naphthalene solution treatment of fluorine-containing materials is mainly through the chemical reaction between the corrosive liquid and the PTFE plastic to tear off part of the fluorine atoms on the surface of the material, thus leaving BBQ grill mesh mat a carbonized layer and certain polar groups on the surface.

This is the most effective and commonly used method among all methods currently studied.. Generally, sodium naphthalene tetrahydrofuran is used as the etching solution. Infrared spectroscopy shows that polar groups such as hydroxyl, carbonyl and unsaturated bonds are introduced on the surface