Abstract: It is provided that an electret having excellent filtering performance and a filter using the electret even in a case where polyolefin resin and magnesium element are contained. An electret comprising a polyolefin resin and a nitrogen-containing compound, wherein 0.1 to 5 parts by mass of the nitrogen-containing compound is contained to 100 parts by mass of the polyolefin resin, a proportion of a magnesium element contained in the electret is 5 to 100 ppm, and a QF value represented by the following formula is not less than 1.00 mmAq?1 when particles having particle diameters of 0.3 to 0.5 ?m are to be collected.

Abstract: An electret is disclosed including: a carrier, and polytetrafluoroethylene having a melting point of 35° C. or higher and 320° C. or lower deposited on the carrier, wherein the electret imparts an electrostatic charge to at least one of the carrier and the polytetrafluoroethylene, and has two or more melting point peaks in simultaneous thermogravimetry and differential thermal analysis. An electret filter is disclosed which preferably is used for a filter which requires durability to tobacco smoke. An electret filter is also disclosed having a fluorine-containing component deposited on a fiber surface, wherein an initial QF value is 0.5 mmAq?1 or more in collection efficiency of particles having a particle diameter of 0.3 to 0.5 ?m at a wind speed of 5 cm/s, and a filter deterioration rate by tobacco smoke loading is ?8/(g/m2) or more.

Abstract: [Problems] An object of the present invention is to provide an electret with an initial increased electrostatic charge quantity and suppressed attenuation of electrostatic charge to liquid particles. [Means for solving] The electret is obtained by depositing polytetrafluoroethylene having a melting point of 35° C. or higher and 320° C. or lower on a carrier and imparting an electrostatic charge to at least one of the carrier and the polytetrafluoroethylene.

Abstract: An electret is disclosed including: a carrier, and polytetrafluoroethylene having a melting point of 35° C. or higher and 320° C. or lower deposited on the carrier, wherein the electret imparts an electrostatic charge to at least one of the carrier and the polytetrafluoroethylene, and has two or more melting point peaks in simultaneous thermogravimetry and differential thermal analysis. An electret filter is disclosed which preferably is used for a filter which requires durability to tobacco smoke. An electret filter is also disclosed having a fluorine-containing component deposited on a fiber surface, wherein an initial QF value is 0.5 mmAq?1 or more in collection efficiency of particles having a particle diameter of 0.3 to 0.5 ?m at a wind speed of 5 cm/s, and a filter deterioration rate by tobacco smoke loading is ?8/(g/m2) or more.

Abstract: [Problems] An object of the present invention is to provide an electret with an initial increased electrostatic charge quantity and suppressed attenuation of electrostatic charge to liquid particles. [Means for solving] The electret is obtained by depositing polytetrafluoroethylene having a melting point of 35° C. or higher and 320° C. or lower on a carrier and imparting an electrostatic charge to at least one of the carrier and the polytetrafluoroethylene.

Abstract: In a component mounting device (1) which has a first mounting lane (L1) and a second mounting lane (L2) and which is structured so as to be able to select either an independence mounting mode or an alternation mounting mode, when device type changing operation is performed with change of the type of boards which are the mounted objects, if a tape feeder float detecting sensor (17) that is provided in proximity of an opening (19) through which a part of the body or the foreign object enters in the component supplying part is, detects a part of the body such as a finger (26) of the operator or the foreign object, operation of the component mounting mechanism which belong to the mounting lane opposite to the mounting lane to which the component supplying part, in which the optical sensor is provided, belongs is stopped.

Abstract: When performing the device type changing operation with the change of the board type to undergo mounting, the component mounting device, which has a first mounting lane and a second mounting lane and which is structured so as to be able to select either an independent mounting mode or an alternate mounting mode, moves a mounting head of the mounting lane to and thereafter positions and fixes to a previously-set predetermined withdraw position [P] where entry of a portion of a body of an operator by way of an opening (19) formed in a protective cover (18a) can be prevented and where safety of the operator is not impaired even if a mounting head of a mounting lane on the other side has undergone collision.

Abstract: In a component mounting device (1) which includes a first mounting lane (L1) and a second mounting lane (L2) and for which an independence mounting mode and an alternation mounting mode are selectable, a first limited movable area (R1A) and a first limited movable area (R1B) in which the movements in the horizontal direction of a first mounting head (13A) and a second mounting head (13B) of the mounting lanes are permitted in the independence mounting mode, are set as areas different from second limited movable areas in the alternation mounting mode, to prevent the mounting head of the mounting lane which is continuously operating from entering into the area of the mounting lanes for which the device type changing operation is being performed.

Abstract: An object of the invention is to provide a component mounting apparatus which includes a plurality of substrate conveying lanes and which efficiently controls the order of carrying in of substrates, thereby capable of improving productivity, and also is to provide a substrate conveyance method in the component mounting apparatus. In a configuration which includes: component supplying units (20A, 20B) positioned lateral to conveyor lines including conveyors (10A, 10B, 10C, 10D) arranged in parallel; and a substrate distributing unit (M3B) configured to distribute substrates (13) delivered from an upstream apparatus, in the case where a substrate request signal (R) is output for a plurality of conveyors, a new substrate (13) is carried in from the substrate distributing unit (M3B) into conveyors (10A, 10D) which are closest to the component supplying units (20A, 20B) among the conveyors (10A, 10B, 10C, 10D).

Abstract: An object of the invention is to provide a component mounting apparatus which includes a plurality of substrate conveying lanes and which efficiently controls the order of carrying in of substrates, thereby capable of improving productivity, and also is to provide a substrate conveyance method in the component mounting apparatus. In a configuration which includes: component supplying units (20A, 20B) positioned lateral to conveyor lines including conveyors (10A, 10B, 10C, 10D) arranged in parallel; and a substrate distributing unit (M3B) configured to distribute substrates (13) delivered from an upstream apparatus, in the case where a substrate request signal (R) is output from conveyors (10B, 10C) which are farther from the component supplying units (20A, 20B), when the substrate request signal R is output for a conveyor (10D) which is closer to the component supplying unit (20b) prior to start of a transferring work of the new substrate (13), the new substrate (13) is carried into the conveyor (10D).

Abstract: A substrate conveyor track is provided with first to fourth conveyors. Two conveyors situated on both sides of the substrate conveyor track, and the other two conveyors situated at the center of the same. There is enabled selection of any one from a small substrate mounting mode for giving a single substrate conveyance width to the four conveyors and mounting electronic components on four small substrates having the single width; a large substrate mounting mode for actuating all movable conveyors to the center of the substrate conveyor track and mounting electronic components on two large substrates by the two conveyors; and a large-small-substrates mounting mode for bringing the two conveyors on one side of the substrate conveyor track, among the four conveyors, into the small substrate mounting mode and bringing one of the conveyors on the other side of the track into the large substrate mounting mode.

Abstract: In a component mounting device (1) which has a first mounting lane (L1) and a second mounting lane (L2) and which is structured so as to be able to select either an independence mounting mode or an alternation mounting mode, when device type changing operation is performed with change of the type of boards which are the mounted objects, if a tape feeder float detecting sensor (17) that is provided in proximity of an opening (19) through which a part of the body or the foreign object enters in the component supplying part is, detects a part of the body such as a finger (26) of the operator or the foreign object, operation of the component mounting mechanism which belong to the mounting lane opposite to the mounting lane to which the component supplying part, in which the optical sensor is provided, belongs is stopped.

Abstract: When performing the device type changing operation with the change of the board type to undergo mounting, the component mounting device, which has a first mounting lane and a second mounting lane and which is structured so as to be able to select either an independent mounting mode or an alternate mounting mode, moves a mounting head of the mounting lane to and thereafter positions and fixes to a previously-set predetermined withdraw position [P] where entry of a portion of a body of an operator by way of an opening (19) formed in a protective cover (18a) can be prevented and where safety of the operator is not impaired even if a mounting head of a mounting lane on the other side has undergone collision.

Abstract: An electric power supplying circuit (52) which supplies electric power to a front mounting head moving mechanism driving part (45a) and a rear mounting head moving mechanism driving part (45b) has a first electric power supply interrupting part (53) which, when a front carriage connection switch (71a) is operated when a front carriage (19a) that is attached to a base (11) is detached from the base (11), only interrupts the electric power supply to the front mounting head moving mechanism driving part (45a), and a second electric power supply interrupting part (54) which, when a rear carriage connection switch (71b) is operated when a rear carriage (19b) that is attached to the base (11) is detached from the base (11), only interrupts the electric power supply to the rear mounting head moving mechanism driving part (45b).

Abstract: In a component mounting device (1) which includes a first mounting lane (L1) and a second mounting lane (L2) and for which an independence mounting mode and an alternation mounting mode are selectable, a first limited movable area (R1A) and a first limited movable area (R1 B) in which the movements in the horizontal direction of a first mounting head (13A) and a second mounting head (13B) of the mounting lanes are permitted in the independence mounting mode, are set as areas different from second limited movable areas in the alternation mounting mode, to prevent the mounting head of the mounting lane which is continuously operating from entering into the area of the mounting lanes for which the device type changing operation is being performed.

Abstract: An object of the invention is to provide a component mounting apparatus which includes a plurality of substrate conveying lanes and which efficiently controls the order of carrying in of substrates, thereby capable of improving productivity, and also is to provide a substrate conveyance method in the component mounting apparatus. In a configuration which includes: component supplying units (20A, 20B) positioned lateral to conveyor lines including conveyors (10A, 10B, 10C, 10D) arranged in parallel; and a substrate distributing unit (M3B) configured to distribute substrates (13) delivered from an upstream apparatus, in the case where a substrate request signal (R) is output from conveyors (10B, 10C) which are farther from the component supplying units (20A, 20B), when the substrate request signal R is output for a conveyor (10D) which is closer to the component supplying unit (20b) prior to start of a transferring work of the new substrate (13), the new substrate (13) is carried into the conveyor (10D).

Abstract: An object of the invention is to provide a component mounting apparatus which includes a plurality of substrate conveying lanes and which efficiently controls the order of carrying in of substrates, thereby capable of improving productivity, and also is to provide a substrate conveyance method in the component mounting apparatus. In a configuration which includes: component supplying units (20A, 20B) positioned lateral to conveyor lines including conveyors (10A, 10B, 10C, 10D) arranged in parallel; and a substrate distributing unit (M3B) configured to distribute substrates (13) delivered from an upstream apparatus, in the case where a substrate request signal (R) is output for a plurality of conveyors, a new substrate (13) is carried in from the substrate distributing unit (M3B) into conveyors (10A, 10D) which are closest to the component supplying units (20A, 20B) among the conveyors (10A, 10B, 10C, 10D).

Abstract: A substrate conveyor track is provided with first to fourth conveyors. Two conveyors situated on both sides of the substrate conveyor track, and the other two conveyors situated at the center of the same. There is enabled selection of any one from a small substrate mounting mode for giving a single substrate conveyance width to the four conveyors and mounting electronic components on four small substrates having the single width; a large substrate mounting mode for actuating all movable conveyors to the center of the substrate conveyor track and mounting electronic components on two large substrates by the two conveyors; and a large-small-substrates mounting mode for bringing the two conveyors on one side of the substrate conveyor track, among the four conveyors, into the small substrate mounting mode and bringing one of the conveyors on the other side of the track into the large substrate mounting mode.

Abstract: It is intended to provide an electret filter which has a large surface charge density, sustains stable electret properties over a long time even in a high-temperature atmosphere and yet degrades to reduce its volume when buried for disposal; and a process for producing the same. The molar ratio of an L-lactic acid monomer to a D-lactic acid monomer ranges from 100 to 85:0 to 15 or 0 to 15:85 to 100. An electret filter having a surface charge density of 1.2×10?9 C/cm2 or more can be obtained by crystallizing by heating at a temperature from the glass transition temperature to the melting point and then, while heating to 60 to 140° C., applying a direct current corona electrical field to thereby cool to 40° C. or lower under.