Abstract: A phenolic resin foam has a density of 30 kg/m3 to 80 kg/m3, a closed cell ratio of 85% or more, and reaches a total amount of heat release of 8 MJ/m2 in a time of 20 minutes or more in a heat release test performed using a cone calorimeter.

Abstract: A phenolic resin foam has a density of 30 kg/m3 to 80 kg/m3, a closed cell ratio of 85% or more, and reaches a total amount of heat release of 8 MJ/m2 in a time of 20 minutes or more in a heat release test performed using a cone calorimeter.

Abstract: A phenolic resin foam has a density of 30 kg/m3 to 80 kg/m3, a closed cell ratio of 85% or more, and reaches a total amount of heat release of 8 MJ/m2 in a time of 20 minutes or more in a heat release test performed using a cone calorimeter.

Abstract: To provide a connected-screw driver capable of stably retaining a screw, which has just come off from a screw connecting belt, and constantly tightening the resultant screw in a tightening position. A connected-screw driver having a driver unit provided with a motor, an output shaft, a housing, and a bit mounted to the output shaft, a slider case mounted to the housing to permit the bit to be inserted therethrough, and a slider 7 provided in the slider case to be able to reciprocate therein and having an engagement member 20a adapted to abut against a member being tightened, the slider feeding connected screws as the slider reciprocates, and wherein the slider 7 is provided with a chuck mechanism 18 that is movable in an axial direction of the bit and temporarily retains a screw, which has come off from a screw connecting belt, until the screw abuts against a member being tightened, and a regulating mechanism 19 that regulates and fixes a position of the chuck mechanism 18 in the axial direction of the bit.

Abstract: A screwdriver includes a driver portion, a slider case having a guide slot, a slider (7), comprising parts (7A) and (7B) reciprocating, in the slider case, an arm portion comprising shaft arm (16) and clutch arm that is supported and rotates in the slider (7), engaged with the guide slot of the slider case, and oscillates in accordance with the reciprocation of the slider, and a cylindrical drum that is supported and rotates in the slider, has two flanges (11b) and (11c) engaged with a screw chain belt and a ratchet (11e) engaged with the arm portion, and intermittently delivers the screw chain belt in accordance with the oscillation of the arm portion. The ratchet (11e) of the drum (11) is formed on an inner surface of the flange (11b).

Abstract: To provide a connected-screw driver capable of stably retaining a screw, which has just come off from a screw connecting belt, and constantly tightening the resultant screw in a tightening position. A connected-screw driver having a driver unit provided with a motor, an output shaft, a housing, and a bit mounted to the output shaft, a slider case mounted to the housing to permit the bit to be inserted therethrough, and a slider 7 provided in the slider case to be able to reciprocate therein and having an engagement member 20a adapted to abut against a member being tightened, the slider feeding connected screws as the slider reciprocates, and wherein the slider 7 is provided with a chuck mechanism 18 that is movable in an axial direction of the bit and temporarily retains a screw, which has come off from a screw connecting belt, until the screw abuts against a member being tightened, and a regulating mechanism 19 that regulates and fixes a position of the chuck mechanism 18 in the axial direction of the bit.

Abstract: A screwdriver includes a driver portion, a slider case having a guide slot, a slider 7 (7A and 7B) reciprocating in the slider case, an arm portion (shaft arm 16 and clutch arm 17) that is supported and rotates in the slider 7, engaged with the guide slot of the slider case, and oscillates in accordance with the reciprocation of the slider, and a cylindrical drum that is supported and rotates in the slider, has two flanges 11b and 11c engaged with a screw chain belt and a ratchet 11e engaged with the arm portion, and intermittently delivers the screw chain belt in accordance with the oscillation of the arm portion,. The ratchet 11e of the drum 11 is formed on an inner surface of the flange 11b.

Abstract: A longer life screwdriver is disclosed, and the screwdriver includes a ball retained in a through-hole in a manner movable in a radial direction of a driving shaft member, the through-hole being defined in a driving shaft member, the ball being possible to project beyond the driving shaft member along an outer circumference of the driving shaft member, the ball further being possible to abut an end of a clutch spring, and elements for allowing the ball to protrude beyond the driving shaft member along the outer circumference of the driving shaft member in response to axial movement of the output shaft member against a pressing member, the improvement comprising: disengagement elements for releasing engagement between the clutch spring and the ball during the reverse rotation of a motor.

Abstract: An antiviral agent of an antiviral ability against various viruses and a method of producing the same are provided. A heat treatment is applied to a calcium-containing substance represented by calcium carbonate-containing substances originating from the animal such as clamshell, eggshell, crustacean shell, bone, coral, and pearl, and calcium carbonate-containing minerals such as limestone. When a temperature of the heat treatment is not less than 650° C. and less than a melting point of the calcium component-containing substance, a sufficient time of the heat treatment is 2 to 13 hours.

Abstract: A BGA semiconductor device using an insulating film and having air purge holes situated between metal through-holes in a base film serving as a substrate Stagnant air can be purged from voids formed between the insulating film arranged on the upper face of a wiring pattern on the base film and the wiring pattern via the air purge holes before electronic elements formed with chip bonding are packaged with asealing resin.

Abstract: A longer life screwdriver is disclosed, and the screwdriver includes a ball retained in a through-hole in a manner movable in a radial direction of a driving shaft member, the through-hole being defined in a driving shaft member, the ball being possible to project beyond the driving shaft member along an outer circumference of the driving shaft member, the ball further being possible to abut an end of a clutch spring, and means for allowing the ball to protrude beyond the driving shaft member along the outer circumference of the driving shaft member in response to axial movement of the output shaft member against a pressing means, the improvement comprising: disengagement means for releasing engagement between the clutch spring and the ball during the reverse rotation of a motor.

Abstract: The present invention relates to a BGA semiconductor device using an insulating film. The BGA semiconductor device using the insulating film has purge holes (a) made between through-holes 2 in a base film 1 as a substrate, so that stagnant air is purged from voids (s) formed between the insulating film 4 set on the upper face of a wiring pattern 3 and the wiring pattern 3 via the purge holes (a) before electronic elements formed with chip bonding are packaged with a sealing resin 5.

Abstract: An antiviral agent of an antiviral ability against various viruses and a method of producing the same are provided. A heat treatment is applied to a calcium-containing substance represented by calcium carbonate-containing substances originating from the animal such as clamshell, eggshell, crustacean shell, bone, coral, and pearl, and calcium carbonate-containing minerals such as limestone. When a temperature of the heat treatment is not less than 650° C. and less than a melting point of the calcium component-containing substance, a sufficient time of the heat treatment is 2 to 13 hours.