How Is a UV Additive Masterbatch Selected?

What Information Defines UV Resistance?

The statement "outdoor environment" is not a technical specification on its own. Geography, solar load, temperature, humidity, chemical contact, duration of use and acceptable color or mechanical change should be clearly defined.

Polymer and end use

PE, PP, PVC or a different polymer will not respond the same to the same UV package. Thickness and surface area are also evaluated for film, profile, injection part and pipe.

Color and pigment effect

Color formulation can affect light absorption and visible color change. The UV package is controlled in the same formulation as the target pigments and other additives.

How to Verify Contribution Package?

Supplier recommendation is the starting point. Final suitability is evaluated by an accelerated or natural aging schedule representing the actual formulation and target condition of use.

Check for conflicting contributions

Antioxidants, processing aids, fillers, pigments, and other stabilizers may work together or affect performance. The entire formulation should be included in the technical evaluation.

measure of success

Color change is not just visible; Depending on the application, changes in properties such as gloss, cracking, impact or shrinkage are also monitored. The acceptance limit is determined before testing.

Dosage and Sample Plan

The safest development plan is established with an initial dosage and controlled comparison samples. Definite life expectancy should not be promised without test results.

comparative sample

One or more dosages recommended with reference to additive-free are produced with the same raw materials and process. Thus, the effect of the formulation change is seen separately.

Registration and re-verification

If the raw material, color, additive or part thickness changes, the previous UV result is not automatically considered valid. In case of critical changes, the sample plan is renewed.

Short Technical Answers