Abstract: A cerium-based abrasive that achieves a high polishing rate and suppresses the occurrence of surface defects such as scratches and pits and the deposition of the abrasive particles on the polished surface in surface polishing of glass substrates or the like, at low cost with a high production efficiency. The cerium-based abrasive includes a cubic composite rare earth oxide and a composite rare earth oxyfluoride, containing 95.0 to 99.5 mass % of total rare earth elements in terms of oxides, containing 54.5 to 95.0 mass % of cerium in terms of oxide, 4.5 to 45.0 mass % of lanthanum in terms of oxide, and 0.5 to 2.0 mass % of neodymium in terms of oxide relative to the total rare earth elements in terms of oxides, containing 0.5 to 4.0 mass % of fluorine atoms, and containing 0.001 to 0.50 mass % of sodium atoms relative to the total rare earth elements in terms of oxides.

Abstract: A cerium-based abrasive that achieves a high polishing rate and suppresses the occurrence of surface defects such as scratches and pits and the deposition of the abrasive particles on the polished surface in surface polishing of glass substrates or the like, at low cost with a high production efficiency. The cerium-based abrasive includes a cubic composite rare earth oxide and a composite rare earth oxyfluoride, containing 95.0 to 99.5 mass % of total rare earth elements in terms of oxides, containing 54.5 to 95.0 mass % of cerium in terms of oxide, 4.5 to 45.0 mass % of lanthanum in terms of oxide, and 0.5 to 2.0 mass % of neodymium in terms of oxide relative to the total rare earth elements in terms of oxides, containing 0.5 to 4.0 mass % of fluorine atoms, and containing 0.001 to 0.50 mass % of sodium atoms relative to the total rare earth elements in terms of oxides.

Abstract: A high-speed continuous rotary type filling and packaging machine can identifies a defective filling head and a defective seal head and it also identify which part of a seal working surface in the seal head has a defect. In a sealing device of the high-seed continuous rotary type filling and packaging machine that covers a container body, which is filled with liquid contents, with a molded lid and seals the container body and the molded lid to produce a sealed container, a filling head number and a seal head number are inkjet-printed, desirably transparent ink, which can be read by irradiation of an ultraviolet ray, on a container body in which a seal working surface in the seal head and the top surface of the container molded lid are brought into press-contact and a positional relation between a seal working surface and the sealed container is fixed.

Abstract: The lid shaping device includes: container placing table 111; container lifter; lid shaping unit 112 including container mouth press 119, annular coil spring 123 arranged in a cylindrical holder, and pusher provided above the annular coil spring and having spring pressing inner circumferential surface 127; and pusher driver. The device operates in the order of first lifting by the container lifter until upper part or middle part of the lid skirt is located on the inner side of the annular coil spring, lowering of the pusher for lowering the container until the spring pressing inner circumferential surface reduces the diameter of the annular coil spring, and second lifting by the container lifter for lifting the container until the lower end of the lid skirt is located on the inner side of the annular coil spring.

Abstract: A continuous rotary filling and packaging machine covers a container body with a molded lid and ultrasonically seals the container body. The molded lid to produce a sealed container includes a lid detecting device 70 disposed on the downstream side of the lid supplying device 60 and an ultrasonic sealing device 100 including lifting and lowering means including a cam mechanism for lifting and lowering a container table 103. The lifting and lowering means is configured such that the molded lid on the container body and a seal working surface of an ultrasonic horn 108 come into press-contact with each other at a top dead point of the container table. A container table lowering control mechanism does not lift, to the top dead point, a container table of a container whose container body does not have the molded lid placed thereon or properly placed thereon as determined.

Abstract: It is a method for producing a food-filled and sealed container having a high product value, in which a container lid made of resin is not deformed after sealing. In this method for producing a food-filled and sealed container, after a food is filled in a container body (10) made of thermoplastic resin, the container is sealed by heat sealing a container lid (20) made of thermoplastic resin, and the container body (10) and/or the container lid (20) have sealing surfaces (13, 24) provided with a concavity or convexity.

Abstract: A high-speed continuous rotary type filling and packaging machine can identifies a defective filling head and a defective seal head and it also identify which part of a seal working surface in the seal head has a defect. In a sealing device of the high-seed continuous rotary type filling and packaging machine that covers a container body, which is filled with liquid contents, with a molded lid and seals the container body and the molded lid to produce a sealed container, a filling head number and a seal head number are inkjet-printed, desirably transparent ink, which can be read by irradiation of an ultraviolet ray, on a container body in which a seal working surface in the seal head and the top surface of the container molded lid are brought into press-contact and a positional relation between a seal working surface and the sealed container is fixed.

Abstract: The lid shaping device includes: container placing table 111; container lifting and lowering means; lid shaping unit 112 including container mouth pressing means 119, annular coil spring 123 arranged in a cylindrical holder, and pusher provided above the annular coil spring and having spring pressing inner circumferential surface 127; and pusher lifting and lowering means. The device operates in the order of first lifting by the container lifting and lowering means until upper part or middle part of the lid skirt is located on the inner side of the annular coil spring, lowering of the pusher for lowering the container until the spring pressing inner circumferential surface reduces the diameter of the annular coil spring, and second lifting by the container lifting and lowering means for lifting the container until the lower end of the lid skirt is located on the inner side of the annular coil spring.

Abstract: A continuous rotary filling and packaging machine covers a container body with a molded lid and ultrasonically seals the container body. The molded lid to produce a sealed container includes a lid detecting device 70 disposed on the downstream side of the lid supplying device 60 and an ultrasonic sealing device 100 including lifting and lowering means including a cam mechanism for lifting and lowering a container table 103. The lifting and lowering means is configured such that the molded lid on the container body and a seal working surface of an ultrasonic horn 108 come into press-contact with each other at a top dead point of the container table. A container table lowering control mechanism does not lift, to the top dead point, a container table of a container whose container body does not have the molded lid placed thereon or properly placed thereon as determined.

Abstract: It is a method for producing a food-filled and sealed container having a high product value, in which a container lid made of resin is not deformed after sealing. In this method for producing a food-filled and sealed container, after a food is filled in a container body (10) made of thermoplastic resin, the container is sealed by heat sealing a container lid (20) made of thermoplastic resin, and the container body (10) and/or the container lid (20) have sealing surfaces (13, 24) provided with a concavity or convexity.

Abstract: The present invention provides a cerium oxide-based abrasive ensuring high removal rate, less generation of scratches, high-precision polished surface with small surface roughness, and a safe, simple and low-cost production process. Further, the present invention provides a method for producing such an abrasive. The method of the present invention comprises (a) adding a precipitant to an aqueous cerium-containing light rare-earth salt solution to precipitate a light rare-earth salt, thereby obtaining a first slurry containing a light rare-earth salt particle; (b) adding a fluorinating agent to a slurry containing a light rare-earth salt particle to react the light rare-earth salt with the fluorinating agent, thereby obtaining a second slurry containing a light rare-earth fluoride particle; (c) mixing the first slurry and the second slurry to obtain a mixed slurry; and (d) drying and firing the mixed slurry, and a cerium oxide-based abrasive obtained by this method.

Abstract: The present invention provides a cerium oxide-based abrasive ensuring high removal rate, less generation of scratches, high-precision polished surface with small surface roughness, and a safe, simple and low-cost production process. Further, the present invention provides a method for producing such an abrasive. The method of the present invention comprises (a) adding a precipitant to an aqueous cerium-containing light rare-earth salt solution to precipitate a light rare-earth salt, thereby obtaining a first slurry containing a light rare-earth salt particle; (b) adding a fluorinating agent to a slurry containing a light rare-earth salt particle to react the light rare-earth salt with the fluorinating agent, thereby obtaining a second slurry containing a light rare-earth fluoride particle; (c) mixing the first slurry and the second slurry to obtain a mixed slurry; and (d) drying and firing the mixed slurry, and a cerium oxide-based abrasive obtained by this method.

Abstract: The present invention provides a mixed rare earth oxide for the production of a cerium-based abrasive, in which the ignition loss after heating at a temperature of 1,000° C. for 1 hour is 0.5 mass % or less on the dry mass basis and the crystallite diameter is from 200 to 400 ?; a mixed rare earth fluoride for the production of a cerium-based abrasive, in which the ignition loss is from 3 to 15% on the dry mass basis; a process for producing a cerium-based abrasive from these mixed rare earth oxide or mixed rare earth fluoride; and a cerium-based abrasive produced by using these mixed rare earth oxide or mixed rare earth fluoride.

Abstract: By providing an abrasive having a ratio of volume-cumulative (95%) average particle size (D95) to volume-cumulative (50%) average particle size (D50) (D95/D50) falling within a range of 1.2 to 3.0 or an abrasive having a volume-cumulative (95%) average particle size (D95) falling within a range of 0.1-1.5 ?m and containing coarse particles having a size more than 10 times the volume-cumulative (50%) average particle size (D50) in an amount, based on the total mass of all the particles, of 1 mass % or less, there can be provided an abrasive, an abrasive slurry, a method for producing an abrasive, and a polishing method which attain, during accurate polishing of substrates such as electronics substrates, a high removal rate and a high-quality surface; i.e., a surface having a high flatness, low surface roughness, and substantially no microscratches or micropits.

Abstract: Cubic boron nitride composite particles containing hard microparticles dispersed in cubic boron nitride particles. The hard microparticles have an average particle size of about 10 nm to about 10 &mgr;m and a particle size equal to or smaller than one-third of the particle size of any of the cubic boron nitride particles, and the amount of the hard microparticles dispersed in the cubic boron nitride particles is from about 1% to about 50% by volume.

Abstract: By providing an abrasive having a ratio of volume-cumulative (95%) average particle size (D95) to volume-cumulative (50%) average particle size (D50) (D95/D50) falling within a range of 1.2 to 3.0 or an abrasive having a volume-cumulative (95%) average particle size (D95) falling within a range of 0.1-1.5 &mgr;m and containing coarse particles having a size more than 10 times the volume-cumulative (50%) average particle size (D50) in an amount, based on the total mass of all the particles, of 1 mass % or less, there can be provided an abrasive, an abrasive slurry, a method for producing an abrasive, and a polishing method which attain, during accurate polishing of substrates such as electronics substrates, a high removal rate and a high-quality surface; i.e., a surface having a high flatness, low surface roughness, and substantially no microscratches or micropits.

Abstract: An abrasive composition for polishing glass, containing a basic salt of magnesium. Also disclosed is a method for polishing glass with the abrasive composition.

Abstract: hBN is converted to cBN by keeping it under temperature and pressure conditions within the range of stability of cubic boron nitride, in the presence of at least one compound selected from carbides of alkali metals and alkaline earth metals, or in the presence both of at least one compound selected from carbides of alkali metals and alkaline earth metals and of at least one compound selected from amides and imides of alkali metals and alkaline earth metals.