How to improve the smoothness of open masterbatch?

To improve the smoothness of the open masterbatch, we can start from the optimization of the formula design:

Choose the right toner

Different smoothing agents have different performance characteristics. For example, fatty acid amide smoothing agent has good smoothing effect and thermal stability; Silicones have excellent lubricity and low coefficient of friction.

According to the specific needs of the choice of suitable smoothing agent or a variety of smoothing agent combination use.

Factors such as molecular weight, melting point and solubility of the smoothing agent are considered. The smooth agent with moderate molecular weight is easier to migrate on the plastic surface and form a uniform lubricating layer; The slicing agent with lower melting point is more easily dispersed during processing. The smooth agent with good solubility is more compatible with the plastic matrix.

Adjust the amount of smoothing agent added

Increasing the amount of smoothing agent can usually improve the smoothness of the open masterbatch, but too much addition may lead to mechanical properties of the plastic decline, precipitation and other problems. Therefore, it is necessary to determine the optimal amount of addition by experiment.

The method of gradually increasing the amount of addition can be used to observe the changes in the smoothness and other properties of the plastic to find a balance point.

Add anti-adhesion agent

The anti-adhesion agent can form a small bulge on the surface of the plastic, reducing the contact area between the plastics, thereby reducing the coefficient of friction and improving the smooth performance. Common anti-adhesive agents are silica, talc powder, calcium carbonate and so on.

The amount of anti-adhesion agent added also needs to be properly controlled, too much anti-adhesion agent may affect the transparency and mechanical properties of the plastic.