SiwoPUD®-Z501

When flexibility meets high-performance chemistry, you get SiwoPUD-Z501—a next-generation aqueous, aliphatic polyurethane dispersion crafted from polyether diol and supplied at 50% non-volatile content in water. Designed for coating applications where softness, durability, and environmental safety matter, Z501 is a workhorse for industries looking to strike the perfect balance between function and cost-efficiency.

This polyurethane dispersion forms a soft, translucent-white film with excellent ductility and fast drying properties—ideal for fabric printing, leather coating, and other applications requiring smooth elasticity and strong adhesion. Z501 stretches expectations, with elongation between 1600–1700%, allowing the film to flex and recover effortlessly, even under stress. At the same time, its tensile strength of 24.6 MPa and 100% modulus of 1.5 MPa ensure it doesn’t just stretch—it performs.

Z501 is also engineered with good shear stability, making it reliable under mechanical stress during formulation or application. And for clients concerned about long-term appearance, this product offers non-yellowing properties, maintaining a clean finish over time.

Its chemical profile is just as impressive. SiwoPUD-Z501 is completely NMP, NEP, and DMAC free, aligning with global environmental standards and ensuring user safety. More importantly, it contains no restricted or declarable substances as defined by the EU—including organotin compounds, heavy metals, and formaldehyde—making it suitable for manufacturers aiming to comply with stringent environmental regulations.

For projects that demand enhanced performance, Z501’s film properties can be further upgraded with the addition of aziridine crosslinkers or water-dispersible polyisocyanate crosslinkers, offering increased durability and washability.

If you’re looking for a cost-effective, high-performance polyurethane solution that’s as strong as it is safe, SiwoPUD-Z501 is your versatile go-to. From textile innovation to premium leather finishes, it delivers a reliable, sustainable edge with every application.