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91. 发明专利

JPH03230416A DIELECTRIC PORCELAIN COMPOSITION AND PORCELAIN CONDENSER USING THIS DIELECTRIC PORCELAIN COMPOSITION 失效
公开(公告)号：JPH03230416A
公开(公告)日：1991-10-14
申请号：JP2486590
申请日：1990-02-03
申请人： TAIYO YUDEN KK
发明人： INOUE YASUSHI , NARITA NAOTO , UEHARA TAKAYUKI , MIZUNO YOICHI , TSUJIKU KOICHIRO
IPC分类号： C04B35/00 , H01B3/12 , H01G4/12
摘要： PURPOSE:To improve dielectric constant, resistivity, and tandelta by adding MgO as a secondary component to a primary component expressed in a specific expression, and by determining the secondary component as from 0.25 to 0.60 weight part to 100 weight part of the primary component. CONSTITUTION:MgO is added as a secondary component to a primary component which is a composition expressed by an expression I, in which (a), (b), (c), (d) are: 0.45

92. 发明专利

JPH03201409A NTC THERMISTOR AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH03201409A
公开(公告)日：1991-09-03
申请号：JP33850989
申请日：1989-12-28
申请人： TAIYO YUDEN KK
发明人： UEDA SHUSAKU , FUKUYAMA JUNICHI , UEHARA TAKAYUKI , FUJIMOTO MASAYUKI
IPC分类号： H01C7/04
摘要： PURPOSE:To obtain a chip type thermistor having two or more pairs of electrodes formed on one element by a method wherein two continued columns of holes in parallel with each other are perforated on a tabular sintered member which becomes a thermistor element, the sintered member is cut into rectangular shape along the center line of the columns of holes, the cut pieces are dipped into an electrode paste layer, and after an electrode part has been formed on the element by conducting an electrode baking process, it is cut into elements. CONSTITUTION:A tabular sintered member 4 is formed, and two continuous rows of holes 6 are perforated in the above-mentioned sintered member 4 using a drill 5 with prescribed intervals. Besides, the sintered member is cut into rectangular shape along the center line of the above-mentioned hole lines using a dicing saw. Then, a rectangular sample 1, which is a base material, is dipped into an electrode paste layer 7 of fixed thickness prepared on a flat stand 8, and an electrode material is applied. Subsequently, an electrode is formed through drying and baking processes. Then, the surface of the electrode is scraped by a dicing saw so as to obtain a desired electrode width on the surface of the electrode, and each of the electrodes 2 are made independent. Lastly, the above-mentioned base material 1 is cut into pieces, and a thermistor, having a recessed part 3 on the desired electrode 2, is obtained.

93. 发明专利

JPH03184206A CERAMIC GREEN SHEET 失效
公开(公告)号：JPH03184206A
公开(公告)日：1991-08-12
申请号：JP32469989
申请日：1989-12-14
申请人： TAIYO YUDEN KK
发明人： UEHARA TAKAYUKI
IPC分类号： H01G4/12 , H01B3/00
摘要： PURPOSE:To prevent electric charge of a ceramic green sheet and make the handling of the sheet easy having a ceramic powder, a binder and an antielectrostatic agent contained therein. CONSTITUTION:A ceramic green sheet contains a ceramic powder, a binder which can be dissolved in an organic solvent, and an antielectrostatic agent. For example, a dielectric powder such as barium titanate is used as the ceramic powder, and a substance, for example polyvinyl butyral, etc., which is dissolved in an organic solvent is used as the binder, and alkylbetain, etc., are used as the antistatic agent. Since an antielectrostatic agent is contained like this, the ceramic green sheet is not electrically charged when it is stripped from a PET (polyethylene terephthalate) film. The green sheet thus becomes easy to be handled.

94. 发明专利

JPH0359862A LUBRICATING SHEET 失效
公开(公告)号：JPH0359862A
公开(公告)日：1991-03-14
申请号：JP19399989
申请日：1989-07-28
申请人： TAIYO YUDEN KK
发明人： UEHARA TAKAYUKI , INABA KAZUO , OOSHIMA SATOSUKE , KITAZAWA KENICHI
IPC分类号： G11B23/087
摘要： PURPOSE:To absorb impact due to contact to a magnetic tape with using a lubricating sheet which guides the side edge of the magnetic tape by sliding by successively laminating a hard lubricating layer and a soft lubricating layer on the base material of the lubricating sheet. CONSTITUTION:A hard lubricating layer and a soft lubricating layer are successively laminated on the base material of the lubricating sheet which guides the side edge of a magnetic tape by a sliding. As for the hard lubricating layer, cured trifunctional silicon compd. is used, and as for the soft lubricating layer, cured bifunctional silicon compd. is used. These silicon compds. are dispersed or dissolved in solvents respectively and then applied on the base material, dried and cured to obtain the lubricating sheet. Thereby, in the process of incorporating a magnetic tape into a cassette case by winding up the tape, the magnetic tape is guided by sliding on the soft lubricating layer. The lubricating sheet damps impact due to contact of the magnetic tape and prevents powder dislodgement of the magnetic layer.

95. 发明专利

JPH02260119A MAGNETIC RECORDING MEDIUM AND ABRASIVE USED FOR THIS MEDIUM 失效
公开(公告)号：JPH02260119A
公开(公告)日：1990-10-22
申请号：JP7812689
申请日：1989-03-31
申请人： TAIYO YUDEN KK
发明人： TAGAYA ATSUSHI , IGUCHI KOICHI , UEHARA TAKAYUKI , SASAZAWA KAZUO
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D163/00 , C09D175/00 , C09D175/04 , C09K3/14 , G11B5/708 , G11B5/84
摘要： PURPOSE:To obtain a recording medium having a magnetic layer excellent in durability and magnetic characteristics by incorporating an abrasive having specified primary treated layer and secondary treated layer into the magnetic layer. CONSTITUTION:The abrasive to be incorporated into the magnetic layer is treated to have the primary treated layer comprising an amino silane coupling agent and the secondary treated layer of at least one kind of urethane or epoxy oligomers added by 1-50pts.wt. to 100pts.wt. of the abrasive. The obtd. medium has the magnetic layer excellent in durability and magnetic characteristics.

96. 发明专利

JPH02252764A RESIN MOLDING AND PRODUCTION THEREOF 失效
公开(公告)号：JPH02252764A
公开(公告)日：1990-10-11
申请号：JP7383889
申请日：1989-03-28
申请人： TAIYO YUDEN KK
发明人： SAITO TAMOTSU , UEHARA TAKAYUKI , SASAZAWA KAZUO
IPC分类号： C08K3/00 , C08L25/00 , C08L101/00
摘要： PURPOSE:To obtain a resin molding with satisfactory dimensional accuracy and dimensional stability and free from the separation of an inorg. filler from the resin by injection molding a composite material obtd. by compounding a higher-MW resin, a lower-MW resin, a silicone oil, and an inorg. filler. CONSTITUTION:100 pts.wt. thermoplastic resin (e.g. polystyrene, polypropylene, or acrylonitrile-styrene copolymer) (A) having an MW of 50000-1000000, 5-100 pts.wt. resin (B) having an MW of 1000-50000, 0.1-10.0 pts.wt. silicone oil, and an inorg. filler in an amt. of 5-200 pts.wt. (based on the sum of A and B) are compounded to give a composite material, which is injection molded. The silicone oil improves the internal lubricity of the composite material to thereby improve the flowability of the melt of the composite material and thus prevent the deposition of the filler from occurring in the resulting molding. Because of the combined use of the high-MW resin and the lower-MW resin, the molding shows satisfactory dimensional accuracy and dimensional stability, and is free from the separation of the filler from the resin.

97. 发明专利

JPH02218079A RESIN MOLDING 失效
公开(公告)号：JPH02218079A
公开(公告)日：1990-08-30
申请号：JP3623489
申请日：1989-02-17
申请人： TAIYO YUDEN KK
发明人： UEHARA TAKAYUKI , INABA KAZUO , SASAZAWA KAZUO
IPC分类号： G11B23/04
摘要： PURPOSE:To obtain a cassette case having good dimensional accuracy by forming the case of a composite material contg. a resin and spherical inorg. fillers and incorporating the spherical inorg. fillers into the composite material at a specific value per 100pts.wt. resin. CONSTITUTION:The cassette case is formed of the composite material contg. the resin and the spherical inorg. fillers. A polethylene resin, acryl resin, ABS resin, etc., are used for the resin. The inorg. fillers are exemplified by CaCO3, TiO2, SiO2, etc., and the average grains of these inorg. fillers are preferably of 0.1 to 10.0mum. The ratio of using the resin and the inorg. fillers is preferably 5 to 200pts.wt. inorg. fillers per 100pts.wt. resin. The dimensional stability is poor when the ratio of the inorg. fillers is lower than the above-mentioned range. The resin amt. is too small and, therefore, the bending and tensile strength of the molding are degraded when the ratio exceeds the above- mentioned range.

98. 发明专利

JPH0294022A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH0294022A
公开(公告)日：1990-04-04
申请号：JP24397988
申请日：1988-09-30
申请人： TAIYO YUDEN KK
发明人： IGUCHI KOICHI , UEHARA TAKAYUKI , SASAZAWA KAZUO
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/06 , G11B5/73 , G11B5/735
摘要： PURPOSE:To prevent a magnetic layer and a back coating layer from sticking when the two layers are brought into contact by incorporating a curing accelerator into at least one of the magnetic layer or the back coating layer. CONSTITUTION:The resin component of the back coating layer and the magnetic layer is composed of a curing-type resin. This resin contains, for example, an isocyanate compound as the curing agent component. The curing accelerator used for this kind of curing-type resin is dibutyl tin diacetate, dibutyl tin dilaurate, dibutyl tin mercaptide, dibutyl tin dimaleate, dibutyl tin thiocarboxylate, phenyl mercury propionate, etc. The accelerator is incorporated into at least one of the magnetic layer or the back coating layer to accelerate curing of the resin.

99. 发明专利

JPH0250317A MAGNETIC RECORDING MEDIUM AND PRIMER COATING MATERIAL THEREOF 失效
公开(公告)号：JPH0250317A
公开(公告)日：1990-02-20
申请号：JP19979488
申请日：1988-08-12
申请人： TAIYO YUDEN KK
发明人： UEHARA TAKAYUKI , AIDA HIROHIKO , SASAZAWA KAZUO
IPC分类号： C09D175/04 , C08G18/30 , C08G18/38 , C09D127/06 , C09D133/04 , C09D167/00 , C09D175/00 , G11B5/73 , G11B5/738
摘要： PURPOSE:To smoothly form a magnetic layer with good adhesiveness and to obtain the magnetic recording medium having good durability and performance by forming a primer coating layer of a cured and coated film which is accelerated in curing by Lewis acid. CONSTITUTION:The primer coating layer is the cured and coated film which contains an isocyanate compd. as a hardener component and contains the Lewis acid. The resin used for the primer coating layer contains one kind selected from a group consisting of resins such as polyester resin and polyurethane resin having reactivity with the isocyanate compd. or acrylic resin, polyvinyl chloride, etc. One kind of electron acceptor such as trimethyl boron, boron trifluoride or ferric chloride is preferable as the Lewis acid. The magnetic layer is smoothly formed with the good adhesiveness in this way and the magnetic recording medium which can improve the durability and the primer coating compd. thereof are obtd.

100. 发明专利

JPH01317224A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH01317224A
公开(公告)日：1989-12-21
申请号：JP14808788
申请日：1988-06-17
申请人： TAIYO YUDEN KK
发明人： UEHARA TAKAYUKI , AIDA HIROHIKO , SASAZAWA KAZUO
IPC分类号： C09D133/06 , C09D167/02 , C09D175/06 , G11B5/73 , G11B5/738
摘要： PURPOSE:To smoothly form a magnetic coated film and to improve adhesiveness by forming an under coating layer of a cured coated film of a coating compd. consisting of specified components and forming this cured coated film so as to be hardly swellable in the solvent of the magnetic coating compd. CONSTITUTION:The under coating layer is formed of the cured coated film consisting of the coating compd. contg. at least one kind selected from the group consisting of an acrylic resin, polyurethane resin having 50,000-500,000 weight average mol. wt., polyvinyl chloride, phenolic resin, and epoxy resin, a polyester resin, and a polyurethane resin having

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