Adhesion is one of the important performance indicators of the physical properties of architectural coating glass film. This force is a manifestation of the mutual attraction of molecular forces between the paint and the glass, that is, the force of mutual attraction generated after two different types of substances come into contact. The adsorption force between the ATo film and the glass is formed by the interaction between the hydroxyl polar groups in the ATo coating and the polar groups on the glass surface. The strength of the adhesion will directly affect the physical properties of the film. It will also affect the anti-aging performance of the coated glass film layer.
So how to test the adhesion of the insulating glass film layer with a paint film scratcher? The specific method is as follows:
The test adopts the cross-cut method, stick the tape on the entire cross-cut, and tear it off at the smallest angle, according to "GB-T9286-1998 Cross-cut test of paint and varnish film" "ISO 29863-2007 Self-adhesive tape. Static The standards stipulated in "Measurement of Shear Adhesion" and "GB/T 1766-2008 Rating Method for Aging of Paint and Varnish Coatings" evaluate the coated glass. The rating is divided into 0-5 grades, and the О grade is "No change", level 5 is "severe change", and level 1-4 is an intermediate state. Through experiments, the ATO solid content between 10-25% coated glass was tested for adhesion. It can be seen from the table that when the ATO solid content is between 10-20%, the adhesion of the coated glass film layer remains at О level, and when the solid content is greater than 20%, the adhesion of the coated glass is between 1-20%. between 2 levels. It can be seen from Table 3-3 that the adhesion of the coated glass film layer decreases with the increase of the solid content, and gradually increases with the decrease of the solid content.
