How to avoid the orange peel phenomenon generated in the powder coating

We often use propulsive agent and flatting agent in practical to improve the coating appearance to eliminate the orange peel,shrinkage cavity,such as appearance defects.Propulsive agent with good performance can drop melt viscosity and then help to melt mixing and pigment sexual distractions in the way of substrate moisture,coating activities flow leveling helps to eliminate the appearance defect and to facilitate air release.Should survey activity modifier dosage and function.Its dosage of lack will cause shrinkage and orange peel and dosage too much and cause loss of light,fog shadow and title of the top painting adhesion.General activity modifier in premixed when attend.They made resin or masterbatch to powdered adsorption on inorganic carrier.The amount of the additives in the powder coating is 0.5~1.5% low can function well.

Promoting activities and flow can cut or prevent the orange peel.System using extended low melt viscosity,curing process flow leveling time and higher surface tension can be forward activity and flow property.Manipulation of the surface tension gradient is an important parameter,cut the orange peel and manipulation of the coating appearance appearance with tension in order to obtain the smallest average appearance product.

By Nicole