Abstract: A water-processing filter having a high dimensional accuracy and an improved filterability (such as a capability to remove turbidity components) is provided. The water-processing filter comprises (A) a hollow cylindrical filter which comprises (a1) a granular activated carbon having a median particle size of 30 to 80 ?m and (a2) a fibrillated fibrous binder. The cylindrical filter (A) has an upstream outer surface having an arithmetical mean deviation of a waviness profile adjusted to not more than 30 ?m and an arithmetical mean deviation of a primary profile adjusted to 35 to 45 ?m. The cylindrical filter (A) may have a downstream inner surface having an arithmetical mean deviation of a waviness profile of not more than 30 ?m and an arithmetical mean deviation of a primary profile of 35 to 45 ?m. The cylindrical filter (A) may have a grounded outer surface.

Abstract: A water-processing filter having a high dimensional accuracy and an improved filterability (such as a capability to remove turbidity components) is provided. The water-processing filter comprises (A) a hollow cylindrical filter which comprises (a1) a granular activated carbon having a median particle size of 30 to 80 ?m and (a2) a fibrillated fibrous binder. The cylindrical filter (A) has an upstream outer surface having an arithmetical mean deviation of a waviness profile adjusted to not more than 30 ?m and an arithmetical mean deviation of a primary profile adjusted to 35 to 45 ?m. The cylindrical filter (A) may have a downstream inner surface having an arithmetical mean deviation of a waviness profile of not more than 30 ?m and an arithmetical mean deviation of a primary profile of 35 to 45 ?m. The cylindrical filter (A) may have a grounded outer surface.

Abstract: The present invention provides an evaporated fuel gas adsorbent, an evaporated fuel gas trapping apparatus that uses the adsorbent, an activated carbon, and a process for producing the activated carbon. The evaporated fuel gas adsorbent is capable of improving adsorptivity and desorptivity by reliably preventing a temperature rise and a temperature fall caused by heat generated in response to the adsorption and desorption of evaporated fuel gas, is capable of achieving a size reduction of the device, and is capable of being easily produced. The activated carbon has high mechanical strength and high abrasive resistance, has many pores suitable to adsorb an organic solvent, especially, evaporated fuel gas, and has a high packing density. The activated-carbon producing process is industrially advantageous.

Abstract: To provide an activated carbon sheet molding that can reduce a leak amount of fuel vapor, realize small ventilation resistance, and is excellent in moldability and strength, and an element for a fuel evaporative emission preventing device for preventing evaporative emission of fuel vapor from a fuel tank system and an intake system by using the activated carbon sheet molding. The object can be achieved by an activated carbon sheet molding made of activated carbon that satisfies b/a=0.3 through 0.55 provided that a 100%-concentration n-butane adsorbing amount per 100 parts by weight of activated carbon at 40° C. is defined as a parts by weight, and a 1%-concentration n-butane adsorbing amount is defined as b parts by weight.

Abstract: The present invention provides an evaporated fuel gas adsorbent, an evaporated fuel gas trapping apparatus that uses the adsorbent, an activated carbon, and a process for producing the activated carbon. The evaporated fuel gas adsorbent is capable of improving adsorptivity and desorptivity by reliably preventing a temperature rise and a temperature fall caused by heat generated in response to the adsorption and desorption of evaporated fuel gas, is capable of achieving a size reduction of the device, and is capable of being easily produced. The activated carbon has high mechanical strength and high abrasive resistance, has many pores suitable to adsorb an organic solvent, especially, evaporated fuel gas, and has a high packing density. The activated-carbon producing process is industrially advantageous.

Abstract: A high-density evaporated fuel gas adsorbent and process for forming such capable of preventing temperature rise and temperature fall caused with adsorption and desorption of an evaporated fuel gas, capable of stably maintaining adsorbing and desorbing properties of the adsorbent, and capable of preventing a heat storage component from leaking out therefrom. The adsorbent is formed by mixing together microcapsules in each of which a substance that absorbs or releases heat in response to phase change is encased and activated carbon in which pore volume in an average pore diameter of 50 nm to 1000 nm is 0.3 mL/g or more and in which half-value width of a D-band peak in the vicinity of 1360 cm?1 and half-value width of a G-band peak in the vicinity of 1580 cm?1 are both equal to 100 cm?1 or more in a Raman spectroscopic analysis, and by molding these integrally.

Abstract: To provide useful general-purpose pelletized activated carbon and an industrially advantageous production method for pelletized activated carbon. The above-mentioned object is achieved by pelletized activated carbon that is pelletized by using, as binders, at least one kind of binder selected from a group (A group) consisting of acrylic emulsions and acryl-styrene-based emulsions and at least one kind of binder selected from a group (B group) consisting of cellulose ether and polyvinyl alcohol-based polymers, and a production method for the same.

Abstract: To provide an activated carbon sheet molding that can reduce a leak amount of fuel vapor, realize small ventilation resistance, and is excellent in moldability and strength, and an element for a fuel evaporative emission preventing device for preventing evaporative emission of fuel vapor from a fuel tank system and an intake system by using the activated carbon sheet molding. The object can be achieved by an activated carbon sheet molding made of activated carbon that satisfies b/a=0.3 through 0.55 provided that a 100%-concentration n-butane adsorbing amount per 100 parts by weight of activated carbon at 40° C. is defined as a parts by weight, and a 1%-concentration n-butane adsorbing amount is defined as b parts by weight.