May, 2024

Powder coating sagging refers to the uneven flow of powder on the surface of the coated part during the coating process, forming a sag or sagging phenomenon. Sagging may cause problems such as uneven coating thickness and poor surface quality. The following are some reasons that may cause powder coating sagging: 1. Properties of powder coating: -High viscosity: High viscosity of powder coating may lead to poor fluidity and increase the risk of sagging. -Excessive particles: Excessive particles may makeRead More …

The density of powder coating depends on its composition and formulation. Generally speaking, the density of powder coating ranges from 1.2 to 1.8 g/cm3. The specific density may also be affected by factors such as particle size, shape and porosity. Further subdivided, the following are the density ranges of several common powder coatings:   Pure polymer powder coating: Its density is usually between 1.2 and 1.5 g/cm3. This type of powder coating is mainly composed of pure polymers, such asRead More …

The effects of conventional additives are similar, and the formulas are basically the same. For example, the amount of leveling agent absorbed by epoxy resin is 4% to 5%, and the amount of leveling agent absorbed by silica, called through-flow, is 0.8% to 1.6%. For the dosage of resin and curing agent, first determine the content of the base material in the formula, and then calculate it according to the recommended ratio. Generally, the excess curing agent is 5-10%. SoRead More …

Powder additives are an important component of powder coatings and are necessary substances to improve the performance of powder coatings in certain aspects such as production, construction or coating film. Although the additive amount is much less than that of resin, curing agent and pigments and fillers, and the total amount is generally within 5%, its impact on the performance of powder coatings is extremely important.   An excellent powder coating additive must meet the following conditions: small addition amountRead More …