The N-40L L-type liner bag uses a dual-layer composite PE structure, designed for 40L large-capacity stainless steel drums. The dual-layer construction is tougher, resisting rupture and leakage during transfer and filling. Raw materials are ultra-purified with strictly controlled particle and metal impurity levels, protecting sensitive electronic chemicals such as photoresists and developers from contamination. The complete sealing kit enables light-blocking, oxygen-isolated storage, and the centred opening fits dedicated supply tubes for smooth discharge with little residue. Single-use operation removes the need for deep drum cleaning — suited to large-batch material turnover on semiconductor production lines.