Coating process: Determination of film flexibility

Core tip: the flexibility of paint film indicates the cracking and peeling of paint film on the substrate after bending test The flexibility of the coating is not only related to the elasticity, but also to the adhesion of the coating The flexibility of paint film can be determined according to the method of national standard "determination of flexibility of paint film" (GB / T 1731-1993) This method specifies a method for determining the flexibility of paint film by using a flexibility tester, and represents the flexibility of paint film by the minimum diameter of the shaft bar that does not cause damage to the paint film (1) Materials and instruments Floor Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: the flexibility of paint film indicates the cracking and peeling of paint film on the substrate after bending test The flexibility of the coating is not only related to the elasticity, but also to the adhesion of the coating The flexibility of paint film can be determined according to the method of national standard "determination of flexibility of paint film" (GB / T 1731-1993) This method specifies a method for determining the flexibility of paint film by using a flexibility tester, and represents the flexibility of paint film by the minimum diameter of the shaft bar that does not cause damage to the paint film (1) Materials and instruments ① the bottom plate of the bottom plate shall be flat and free of distortion, and the surface of the plate shall be free of any visible cracks and wrinkles Unless otherwise specified, the base plate shall be 120mm x 25mm > C (0.2-0.3) mm tinplate ② 4X magnifier ③ Flexibility tester the flexibility tester consists of seven steel shaft rods (diameter: 1mm, 2mm, 3mm, 4mm, 5mm, 10mm, 15mm) with different diameters fixed on the base (2) Operation step ① unless otherwise specified, the test shall be carried out according to the constant temperature and humidity conditions specified in GB / T 9278 ② Use both hands to press the paint film of the test plate upward on the shaft bar of the specified diameter Use the force of two thumbs to bend the test plate around the shaft bar within 2-3s After bending, the two thumbs shall be weighed on the center line of the shaft bar ③ After bending, observe the paint film with a 4x magnifying glass Check whether the paint film is damaged by reticulation, crack and peeling Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,