DXSORB®3639 is a widely used liquid polymer ultraviolet absorber, suitable for PET packaging materials such as food, beverages, milk, and pharmaceuticals. This product can absorb all ultraviolet rays below 390nm and provide an effective UV barrier, which can greatly extend the shelf life of the packaging container. Traditional UV absorbers must be added at high concentrations, which can cause unnecessary color pollution, migration, precipitation, and odor. DXSORB ® 3639 is colorless and odorless, with good thermal stability, and compatible with most common resins. The uniform appearance of the liquid allows it to be easily dispersed into the resin or machine, and the processing has good consistency, achieving high cost-effectiveness.