Abstract: The present invention provides a hot melt adhesive for high-speed coating and spiral coating at low temperature. The hot melt adhesive has excellent adhesion to polyethylene and nonwoven fabric, and is suitable for disposable products. The hot melt adhesive comprises: (A) a propylene homopolymer having a melting point of 100° C. or lower which is obtainable by polymerizing propylene using a metallocene catalyst; and (B) an ethylene-based copolymer.

Abstract: The present invention provides a hot melt adhesive suitable for use in disposable products, which can be applied at a high speed and provides excellent in adhesion in a wet state and low-temperature coating, with little odor. The hot melt adhesive for disposable products comprises: (A) a propylene homopolymer having a melting point of 100° C. or lower obtained by polymerizing propylene using a metallocene catalyst; and (B) a wax modified with carboxylic acid and/or carboxylic acid anhydride. The wet adhesion of the hot melt adhesive is improved when the wax is modified with maleic acid and/or maleic anhydride.

Abstract: A centrifugal separator comprises a rotary body having an outlet at the peripheral part and a sliding valve cylinder in a rotary shell of the rotary body and a lower passage of the sliding valve cylinder formed between the bottom of the rotary shell and the sliding valve cylinder and a first functional fluid inlet connected to the lower passage and a conduit which is connected to an inner part of the lower passage of the sliding valve cylinder and which is opened and closed by the movement of a pilot sliding cylinder which is vertically slidably connected under the rotary shell to form an upper passage and a lower passage which are connected to a second functional fluid inlet, and the upper passage is connected to a nozzle.