Abstract: Disclosed are abrasive particles, a method for manufacturing the abrasive particles, and a method for manufacturing a Chemical Mechanical Polishing (CMP) slurry. The method for manufacturing abrasive particles for the CMP slurry includes preparing a raw material precursor, drying the raw material precursor, and calcining the dried raw material precursor using a calcination furnace where a gas atmosphere having relatively less oxygen in comparison with an air atmosphere is created.

Abstract: Disclosed are abrasive particles, a method for manufacturing the abrasive particles, and a method for manufacturing a Chemical Mechanical Polishing (CMP) slurry. The method for manufacturing abrasive particles for the CMP slurry includes preparing a raw material precursor, drying the raw material precursor, and calcining the dried raw material precursor using a calcination furnace where a gas atmosphere having relatively less oxygen in comparison with an air atmosphere is created.

Abstract: A device for feeding buttons to a sewing position. The device centers the buttons and adjusts the width and height of a button feeding passage in accordance with the dimension of the buttons to be conveyed by a conveyor belt, thus appropriately arranging the buttons on garments at the sewing position. The device has two movable guide beds defining a button guide channel. A height adjusting unit is provided above the button guide channel and is vertically moved relative to the channel in accordance with the dimension of the buttons, thus adjusting the height of the channel. A width adjusting unit is operated in conjunction with the two guide beds so as to adjust the width of the channel in accordance with a width of the buttons. A centering unit is operated in conjunction with the width adjusting unit so as to center each of the conveyed buttons at an outlet of the channel.

Abstract: An apparatus for binding a button-fixing thread running through a button sewed on a garment or other fabric, which is capable of winding a binding thread around the button-fixing thread by several turns in a safe, simple, easy and convenient manner while forming a twist with the binding thread at every turn, thereby not only preventing the button from being separated due to a loosening of the button-fixing thread during a strong washing operation or an operation of passing the button through a button slit formed in the garment, but also achieving an improvement in the binding operation and an improvement in the reliability in use.