What is the benefit of a PET/PBT blend in paint brush filaments?

The PET/PBT blend is a superior material for demanding painting applications. The PBT (Polybutylene Terephthalate) polymer significantly increases the filament's stiffness, toughness, and resistance to abrasion and solvents. This means brushes made with our blend are more durable, maintain their shape better under pressure, and are less likely to fray or degrade when used with aggressive paints or for rough surfaces.