air filter is used for manufacturing cars, ships, generator set internal combustion machinery's air filter cores Polyurethane Systems for Air FilterDLQ-A/ DLQ-BProduct introductionA component of Polyurethane systems of air filter DLQ-Ais composed of hyperactive polyether polyols, cross linking agent, compound catalyst and so on. B component DLQ-Bis modified isocyanate, and it is micro-pore ...