ADSORBENT FOR CANISTER, AND CANISTER

摘要

To obtain adsorbent (10), meltable core which melts away during baking and binder are added to powdery activated carbon having microscopic pore whose size is less than 100 nm together with water and mixed together, then this mixture is molded into hollow cylindrical shape whose outside diameter is 4 - 6 mm and baked. Although macroscopic pore whose side is 100 nm or more is formed by the meltable core, proportion of volume of the macroscopic pore to volume of the microscopic pore is adjusted to 65% ˆ¼ 150%. The adsorbent (10) has shape in cross section formed from cylindrical wall (10A) and cross-shaped radial wall (10B), and thickness of each part is within a range of 0.6 ˆ¼ 3 mm. The adsorbent (10) of the present invention can satisfy adsorbing/desorbing performance of fuel vapor, flow resistance as a canister and strength of the adsorbent at the same time.