Patent ID: 7906078

Claim:
A canister for preventing vehicle fuel vaporization, comprising: a case containing a latent-heat storage type adsorbent composition, the latent-heat storage type adsorbent composition comprising an adsorbent and a heat-storage material; the adsorbent being in the form of granules or powder having pores, and being capable of adsorbing vehicle fuel vapor, the heat-storage material comprising a microencapsulated phase-change material, the phase-change material absorbing or releasing latent heat in response to temperature change, wherein the average particle diameter of the heat-storage material is about 1/1000 to about 1/10 of that of the adsorbent, the average particle diameter of the adsorbent is about 1 μm to about 10 mm, the average particle diameter of the heat-storage material is about 0.1 to about 500 μm, the specific surface area of the adsorbent is about 500 to about 2500 m 2 /g, the diameter of the pores of the adsorbent is about 10 Å to about 50 Å, and the content of the heat-storage material is about 10 to about 100 parts by weight based on 100 parts by weight of the adsorbent, wherein the heat-storage material is adhered to and/or deposited on the surface of the adsorbent.