How to Tell Good from Bad Floor Construction Coatings

End-users of floor paint coatings usually attach great importance to the inspection of various quality indicators of the finished coating film during construction of anti-static floor paint, while they often neglect the quality inspection of the raw floor paint material itself. Only by strictly controlling and selecting qualified floor paint before construction can high-quality coating results be guaranteed.

1. Viscosity Inspection of Floor Paint

   Coating viscosity is classified into relative viscosity, kinematic viscosity and absolute viscosity. On construction sites, the viscosity commonly measured by a No.4 flow cup is relative viscosity.

   Besides the widely used No.4 flow cup, other testing instruments include the No.1 flow cup and falling ball viscometer for high-viscosity coatings, as well as the less commonly used rotational viscometer.

2. Fineness Inspection of Floor Paint

   The particle size of pigments and fillers in colored coatings, as well as their uniform dispersion during production, greatly affect the flatness, smoothness and gloss of the finished film. Therefore, it is necessary to test coating fineness to meet specified quality standards. A grindometer is commonly used to measure fineness indicators.

3. Common Coating Quality Standards and Factory Standards

   For solvent-based coatings, there are international quality standards, as well as national standards, Ministry of Chemical Industry standards, and manufacturer’s factory standards in China.

Measurable items in floor paint quality standards include fineness, viscosity, leveling property, hiding power, density, flash point, consistency and other parameters. There are also some visual quality items that can be checked by visual observation before use.

Although material selection and basic construction procedures are largely the same for new epoxy floor installation and floor renovation, their construction methods differ. For floor renovation, the old floor coating must first be completely removed, followed by base course treatment.

If floor renewal is required due to corporate development needs, the primary consideration is the compatibility between the old and new floor coatings. If compatibility is good, simply clean the surface before recoating. If compatibility is poor, the old floor layer must be fully removed before reinstallation.

Epoxy anti-static floor paint features both decorative and practical performance. However, common defects such as film blistering, brush marks, hollowing and peeling often occur after construction. These problems are mainly caused by improper construction, inferior raw materials, or lack of proper daily maintenance during use.

Epoxy floor paint generates low internal stress during cross-linking and curing film formation. During the film-forming process, many factors related to the technical construction of functional floor paint may induce internal stress in the coating film, resulting in final defects, especially reduced adhesion between the film and the substrate.