Abstract: The present invention provides the process for preparing a fluorine-containing polymer which can easily and efficiently separate a fluorine-containing polymer and water from an aqueous dispersion of a fluorine-containing polymer, and the fluorine-containing polymer obtained by the mentioned preparation process. Further the present invention provides the molded article obtained by crosslinking a curable composition comprising the above-mentioned fluorine-containing polymer and a crosslinking agent. The preparation process is a process for preparing a fluorine-containing polymer comprising a step for heat-treating an aqueous dispersion of a fluorine-containing polymer having a concentration of 3 to 70% by weight to obtain the fluorine-containing polymer having a water content of not more than 1% by weight.

Abstract: Guiding rails (22) are formed along both the edge portions of a back surface (21) of an optical fiber holder (20), which guide positioning protrusions (12) formed on a mounting surface (110) in an optical fiber processing device (10). The interval between inner-wall surfaces (23) of the guiding rails (22) opposed to each other corresponds to the interval between the positioning protrusions (12). Hollow portions (24) are formed at the back surface (21) of the holder (20), into which the positioning protrusions (12) are inserted. The holder (20) is tightly fixed on the mounting surface (11) of the device (10).

Abstract: The present invention provides a peroxide-vulcanizable fluorine-containing elastomer composition which is remarkably improved in fluidity and thereby exhibits improved processability, though conventional fluorine-containing elastomer compositions could be molded only by a molding process having a problem in its productivity, for instance, compression molding or transfer molding which has been used so far as a general molding process. The present invention further provides a molded article obtained by vulcanizing the composition. The present invention also provides a fluorine-containing elastomer composition in which a large amount of a filler can be blended.

Abstract: The present invention provides a process for preparing a fluorine-containing elastomer in a high productivity comparable to that of non-iodine transfer polymerization process by carrying out an iodine transfer polymerization at high pressure. The present invention also provides a fluorine-containing elastomer prepared by this process, and fluorine-containing molded articles. The process is a batch copolymerization process conducted under conditions that the reduced temperature of the critical constant is at least 0.95 and the reduced pressure of the critical constant is at least 0.80 wherein the reduced temperature and the reduced pressure are calculated using the Peng-Robinson formula from the critical temperature, the critical pressure and the composition ratio of each of the monomers in the gaseous phase in a reaction vessel, in which ethylenically unsaturated compounds containing at least one fluoroolefine are copolymerized in the presence of a compound having the formula: Rf1.

Abstract: The present invention provides a process for preparing a fluorine-containing elastomer in a high productivity comparable to that of non-iodine transfer polymerization process by carrying out an iodine transfer polymerization at high pressure. The present invention also provides a fluorine-containing elastomer prepared by this process, and fluorine-containing molded articles. The process is a batch copolymerization process conducted under conditions that the reduced temperature of the critical constant is at least 0.95 and the reduced pressure of the critical constant is at least 0.

Abstract: The present invention has for its object to provide a fluorocopolymer which is available at low cost, has fluidity at room temperature, and is curable, a method of producing the same copolymer and a curable composition having good processability and in situ moldability. The present invention is directed to a fluorocopolymer which is fluid at room temperature and curable, and which is obtainable from a trifluorovinyl group-containing monomer with an ethylenically unsaturated double bond moiety being a trifluorovinyl group.

Abstract: In an optical fiber fusion reinforcing device, a distance from an end face 723 to a mid point C6 of a reinforcing device 7 is set equal to a distance from a fusion splicing point M to an end face of a fusion splicing device 6 where optical fibers 3, 3 are inserted. The fusion splicing device 7 includes: positioning member 72 for aligning a mid point C7 of a heat shrinkable reinforcing member 13, which is slidably mounted on the fusion spliced optical fibers, and the fusion splicing point M of the optical fibers 3, 3 with each other; housing portion for housing the optical fibers 3, 3 and the heat shrinkable reinforcing member 13 so that the fusion splicing point M and the mid point of the heat shrinkable reinforcing member 13 are aligned, and heater for melting the heat shrinkable reinforcing member 13 in the housing portion.

Abstract: The present invention provides a process for preparing a fluorine-containing elastomer in a high productivity comparable to that of non-iodine transfer polymerization process by carrying out an iodine transfer polymerization at high pressure. The present invention also provides a fluorine-containing elastomer prepared by this process, and fluorine-containing molded articles. The process is a batch copolymerization process conducted under conditions that the reduced temperature of the critical constant is at least 0.95 and the reduced pressure of the critical constant is at least 0.

Abstract: The invention provides a fluoropolymer composition capable of improving the characteristics of the cured material obtained therefrom. A fluoropolymer composition comprising a methylene group-containing fluoropolymer (A) and a hydrosilylation catalyst (B), wherein the methylene group-containing fluoropolymer (A) has methylene group-containing repeating units in the main chain thereof and is capable of hydrosilylation in the presence of the hydrosilylation catalyst (B) and one terminus of the chain is a carbon-carbon double bond or an Si—H group and the other terminus of the chain is an Si—H group or a carbon-carbon double bond.

Abstract: The present invention has for its object to provide a fluorocopolymer which is available at low cost, has fluidity at room temperature, and is curable, a method of producing the same copolymer and a curable composition having good processability and in situ moldability. The present invention is directed to a fluorocopolymer which is fluid at room temperature and curable, and which is obtainable from a trifluorovinyl group-containing monomer with an ethylenically unsaturated double bond moiety being a trifluorovinyl group.

Abstract: An optical axis adjusting system for a vehicle head lamp detects the inclination of the front part of a vehicle with respect to a road surface and controls an optical axis adjusting system by an ECU according to the detected inclination to adjust the optical axis of the head lamp. Therefore, the optical axis adjusting system is capable of finding the accurate inclination of the entire vehicle and properly adjusting the optical axis.

Abstract: The present invention relates to an optical fiber recoating device, and to an improvement in the molds employed in this device. The optical fiber recoating device is provided for filling a recoating resin into molds, wherein semicircular mold grooves in molds into which the recoating resin is filled are longer than a bare fiber portion of an optical fiber, and an outer diameter of mold groove is larger than the outer diameter of semicircular sheath engaging grooves that engage a sheath of the optical fiber. As a result, a cylindrically shaped extending portion which extends to the sheath is formed to each end of the recoated sheath, so that joining strength of the recoated sheath is improved.

Abstract: In an optical fiber fusion reinforcing device, a distance from an end face 723 to a mid point C6 of a reinforcing device 7 is set equal to a distance from a fusion splicing point M to an end face of a fusion splicing device 6 where optical fibers 3, 3 are inserted. The fusion splicing device 7 includes: positioning member 72 for aligning a mid point C7 of a heat shrinkable reinforcing member 13, which is slidably mounted on the fusion spliced optical fibers, and the fusion splicing point M of the optical fibers 3, 3 with each other; housing portion for housing the optical fibers 3, 3 and the heat shrinkable reinforcing member 13 so that the fusion splicing point M and the mid point of the heat shrinkable reinforcing member 13 are aligned, and heater for melting the heat shrinkable reinforcing member 13 in the housing portion.

Abstract: The invention relates to a recoating method for optical fiber, and in particular to prevent incorporation of bubbles into the recoating resin. In a recoating method for optical fiber, a bare fiber portion of an optical fiber is recoated by guiding recoating resin into mold forms, and the injection speed of the recoating resin injected into the mold forms is such that bubbles are not trapped due to the resin injection. This injection speed is preferably equal to or less than 6 mm/second.

Abstract: Guiding rails (22) are formed along both the edge portions of a back surface (21) of an optical fiber holder (20), which guide positioning protrutions (12) formed on a mounting surface (110) in an optical fiber processing device (10). The interval between inner-wall surfaces (23) of the guiding rails (22) opposed to each other corresponds to the interval between the positioning protrutions (12). Hollow portions (24) are formed at the back surface (21) of the holder (20), into which the positioning protrutions (12) are inserted. The holder (20) is tightly fixed on the mounting surface (11) of the device (10).

Abstract: An optical axis adjusting system for a vehicle head lamp detects the inclination of the front part of a vehicle with respect to a road surface and controls an optical axis adjusting system by an ECU according to the detected inclination to adjust the optical axis of the head lamp. Therefore, the optical axis adjusting system is capable of finding the accurate inclination of the entire vehicle and properly adjusting the optical axis.

Abstract: The present invention relates to an optical fiber recoating device, and to an improvement in the molds employed in this device. The optical fiber recoating device is provided for filling a recoating resin into molds, wherein semicircular mold grooves in molds into which the recoating resin is filled are longer than a bare fiber portion of an optical fiber, and an outer diameter of mold groove is larger than the outer diameter of semicircular sheath engaging grooves that engage a sheath of the optical fiber. As a result, a cylindrically shaped extending portion which extends to the sheath is formed to each end of the recoated sheath, so that joining strength of the recoated sheath is improved.