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1. 发明专利

JP2001091797A OPTICAL FIBER CORD 失效
公开(公告)号：JP2001091797A
公开(公告)日：2001-04-06
申请号：JP26908999
申请日：1999-09-22
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON TELEGRAPH & TELEPHONE , TOYOKUNI DENSEN KK
发明人： YAMANO MASAYOSHI , SUETSUGU YOSHIYUKI , TACHIKURA MASAO , URUNO SHIGENORI , IZUMIDA CHIKASHI , TOMITA NOBUO , TAMURA HAJIME , NAGASE YOICHI , TSUCHIYA NOBUYUKI , OKABE YOSHIHISA
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber cord with which a finer diameter may be achieved and a non-halogen characteristic and fire-retardance are sufficiently excellent while having sufficient bending rigidity and transmission characteristic. SOLUTION: This optical fiber cord 1 has a coated optical fiber 11, a buffer fiber layer 12 covering the circumference of the coated optical fiber 11 and a sheath 13 (sheath member) covering the circumference of the buffer fiber layer 12. The sheath 13 is formed by laminating an inner layer 13a which consists of a first resin compsn. not containing a halogen element and has a Young's modulus of 80 to 150 kgf/mm2 and an outer layer 13b which consists of a second resin compsn. not containing the halogen element, has a Young's modulus of 5 to 50 kgf/mm2 and has the flame-retardance of a V-0 level in a UL-94 test.

2. 发明专利

JPH09243884A OPTICAL FLAT CABLE 失效
公开(公告)号：JPH09243884A
公开(公告)日：1997-09-19
申请号：JP8335896
申请日：1996-03-12
申请人： NIPPON TELEGRAPH & TELEPHONE , TOYOKUNI DENSEN KK
发明人： NAGANA RIYUUICHIROU , NAGASE YOICHI , TAMURA HAJIME
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To facilitate the installation of work and terminal treatment and to prevent the damage or degradation of optical fibers by providing an optical flat cable with a tension member arranged to be parallel with both side parts of optical fiber ribbon cords. SOLUTION: The tension member 3 is so arranged as to exist in parallel with both side parts of the optical fiber ribbon cords 2. A sheath 4 covers the outer peripheral parts of the optical fiber ribbon cords 2 and the tension member 3 in such a manner that its outer peripheral part is formed to a nearly elliptic shape. Each optical fiber ribbon cord 2 has a coated optical fiber ribbon 8A formed by covering the outer peripheral parts of plural coated optical fibers 8 with a UV curing resin 8A in such a manner that the outer peripheral part is formed to an elliptic shape. The outer peripheral parts of the coated optical fibber ribbons 8A are coated with tensile fibers 9 in such a manner that the outer peripheral part is formed to a square shape of a rectangular shape. The outer peripheral parts of the tensile fibers 9 are covered with the sheath 10 for cords.

3. 发明专利

JPH09243883A OPTICAL FLAT CABLE 失效
公开(公告)号：JPH09243883A
公开(公告)日：1997-09-19
申请号：JP8335796
申请日：1996-03-12
申请人： NIPPON TELEGRAPH & TELEPHONE , TOYOKUNI DENSEN KK
发明人： NAGANA RIYUUICHIROU , NAGASE YOICHI , TAMURA HAJIME
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To make it possible to easily peel the sheath at the end of an optical flat cable without damaging optical fibers and without the applying of force thereon at the time of a terminal treatment by providing this optical flat cable with at least >=1 pieces of ripping grooves formed on the outer peripheral part of the sheath. SOLUTION: Optical fiber cords 3 are so arranged as to be parallel with both side parts of a tension member 2. The sheath 4 covers the outer peripheral parts of the optical fiber cords 3 and the tension member 2 in such a manner that its outer peripheral part is formed to an elliptic shape. The ripping grooves 5 are formed in the positions, which are the front and rear surface parts of nearly the central part of the sheath 4 and where the tension member 2 exists. The ripping grooves 5 are cut by pulling the sheath 4 at the end in a lateral direction in such a manner that the ripping grooves 5 can cut the sheath 4 at the end at the time of the terminal treatment. As a result, the easy taking out of the optical fiber cords 3 from the inside of the ripped sheath is made possible.

4. 发明专利

JPH09243877A COATED OPTICAL FIBER 失效
公开(公告)号：JPH09243877A
公开(公告)日：1997-09-19
申请号：JP8335996
申请日：1996-03-12
申请人： NIPPON TELEGRAPH & TELEPHONE , TOYOKUNI DENSEN KK
发明人： NAGANA RIYUUICHIROU , NAGASE YOICHI , TAMURA HAJIME
IPC分类号： G02B6/44 , G02B6/02
摘要： PROBLEM TO BE SOLVED: To produce a coated optical fiber capable of sufficiently satisfying an ironing characteristic, tensile characteristic, bending characteristic, temp. characteristic, side pressure characteristic, cost effectiveness, etc., by forming coating layers of two layers. SOLUTION: The coated optical fiber 1 is composed of an optical fiber 2, a UV curing resin layer 3 covering the outer peripheral part of the optical fiber 2 and a resin layer 4 covering the outer peripheral part of this UV curing resin layer 3. The coating layer 4 is composed of a first coating layer 5 which covers the outer peripheral part of the UV curing resin layer 3 and a second coating layer 6 which covers the outer peripheral part of the first coating layer 5 and is formed by using a material different form the first coating layer 5. The first coating layer 5 is formed by using a flexible thermoplastic resin, for example, polyvinyl chloride, having a Young's modulus of 5 to 100N/mm . The second coating layer 6 is formed by using a semi-rigid or rigid thermoplastic resin, for example, polyvinyl chloride, having a Young's modulus of 200 to 500N/mm .

5. 发明专利

JPS63216011A OPTICAL FIBER CORD 失效
公开(公告)号：JPS63216011A
公开(公告)日：1988-09-08
申请号：JP4961787
申请日：1987-03-04
申请人： SUMITOMO ELECTRIC INDUSTRIES , TOYOKUNI DENSEN KK
发明人： SUZUKI FUMIO , NAGASE YOICHI
IPC分类号： G02B6/44 , C03C25/10 , C03C25/24
摘要： PURPOSE:To improve the dimensional stability and heat resistance of the title cord by incorporating the needle crystal of calcium metasilicate (wollastonite) in the thermoplastic resin constituting the sheath of an optical fiber cord. CONSTITUTION:Plural reinforcing fibers 2 are uniformly and longitudinally attached to an optical fiber core 4 or twisted on the core, and the sheath 1 of a thermoplastic resin is coated thereon to form an optical fiber cord. The surface of the needle crystal of calcium metasilicate (wollastonite) contained in the thermoplastic resin constituting the sheath 1 is treated with a silane coupling agent. From 5-200pts.wt., preferably 10-100pts.wt., anisotropic filler such as wollastonite is filled in 100pts.wt. vinyl chloride resin, hence the contraction of the sheath after a heat cycle can be reduced to

6. 发明专利

JPS6381306A OPTICAL FIBER CORE AND ITS PRODUCTION 失效
公开(公告)号：JPS6381306A
公开(公告)日：1988-04-12
申请号：JP22701486
申请日：1986-09-25
申请人： SUMITOMO ELECTRIC INDUSTRIES , TOYOKUNI DENSEN KK
发明人： SUZUKI FUMIO , NAGASE YOICHI
IPC分类号： C03C25/10 , B29D11/00 , G02B6/44
摘要： PURPOSE:To decrease an optical transmission loss and an increase in the loss by a temp. change by forming a protective coating layer consisting of a thermoplastic resin formed on an optical fiber strand in a manner as to have compressive strain. CONSTITUTION:The thermoplastic resin 4 flows a double pipe flow passage between a die 1 and a nipple 2 and the thermoplastic resin is coated on the optical fiber strand 3 where the strand emits from the nipple 2. The thermoplastic resin 4 is extrusion-coated under pressurization on the optical fiber strand 3 at the amt. required for coating said thermoplastic resin on the optical fiber strand to the outside diameter which is the same as the bore of the nozzle of the die 1 or the amt. in excess thereof as the output of the above-mentioned resin. Since the thermoplastic resin 4 coated on the optical fiber strand 3 is molded while the resin is held pressurized in the longitudinal direction of the optical fiber, the shrinkage of the coating to be generated right after the extrusion coating and after heat history does not grow to the shrinkage rate to the extent of generating microbending in the optical fiber strand and rather acts in the direction to elongate the optical fiber. The transmission characteristic of the optical fiber is thereby improved.

7. 发明专利

JP2000241676A COATED FIBER FOR OPTICAL FIBER 失效
公开(公告)号：JP2000241676A
公开(公告)日：2000-09-08
申请号：JP4588999
申请日：1999-02-24
申请人： TOYOKUNI DENSEN KK
发明人： TAMURA HAJIME , NAGASE YOICHI , TSUCHIYA NOBUYUKI , OKABE YOSHIHISA
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To provide a coated fiber for optical fiber which fully satisfies all of environmental characteristics such as flame-retardance, optical characteristics, a low temperature, a high temperature and wet heat, and mechanical characteristics such as side pressure and the like, by constituting a coated layer of two non-halogen-containing layers. SOLUTION: This coated fiber comprises an optical fiber 2, an ultra-violet curing resin layer 3 for coating an outer circumferential part of the optical fiber 2, and a coating layer 4 for covering the resin layer 3. The coating layer 4 is composed of a non-halogen-containing polyolefin resin layer 5 and a non- halogen-containing polystylene resin layer 6 to satisfy all of environmental characteristics such as flame-resistance, optical characteristics, low temperature, high temperature and wet heat, and mechanical characteristics such as side pressure.

8. 发明专利

JPH0777644A OPTICAL CABLE FOR CONNECTOR CONNECTION 失效
公开(公告)号：JPH0777644A
公开(公告)日：1995-03-20
申请号：JP24742093
申请日：1993-09-08
申请人： TOYOKUNI DENSEN KK
发明人： NAGASE YOICHI
IPC分类号： G02B6/46 , G02B6/36 , G02B6/44
摘要： PURPOSE:To provide the optical cable for connector connection which is connected to an FDDI connector, is directly connectable to a single core connector as well without using a tube and branching member and is enables the easy and rapid conduction of a connecting operation at a low cost. CONSTITUTION:The optical cable 1 for connector connection is composed of at least >=2 pieces of optical cords 2 which consist of coated optical fibers 6, high-strength fiber layers 7 covering the outer peripheral parts of these coated optical fibers 6 and sheaths 8 covering the outer peripheral parts of the high- strength fiber layers 7 and are formed to the outside diameter side connectable to the single core connector, a paper tape 4 which is wound on the outer peripheral parts of the high-strength fiber layers 7 and the optical cords 7 to retain these layers and cords and an external sheath 5 of the outside diameter size to cover the outer peripheral part of this paper tape 4 and to make the cable connectable to the FDDI connector.

9. 发明专利

JP2001174678A COATED OPTICAL FIBER 失效
公开(公告)号：JP2001174678A
公开(公告)日：2001-06-29
申请号：JP36231199
申请日：1999-12-21
申请人： TOYOKUNI DENSEN KK
发明人： TAMURA HAJIME , NAGASE YOICHI , HASHIZUME EIKO
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To obtain a coated optical fiber which is formed by using a halogen element-free fire-retardant phosphorus-containing polyethylene(PE) outer resin coating layer, is high in hygroscopicity by this phosphorus-containing PE outer resin coating layer, is capable of efficiently obstructing the adverse influence to be exerted on the optical characteristics of the optical fiber UV by granular phosphorus and is accepted in a VW-1 test vertical tray fire-retardance test of UL. SOLUTION: The coated optical fiber comprises the optical fiber UV, a halogen element-free fire-retardant inner resin coating layer to coat the outer peripheral part of the optical fiber UV so as not to impart moisture to the optical fiber UV and not to adversely affect its optical characteristics and the halogen element-free fire-retardant phosphorus-containing PE outer resin coating layer coating the outer peripheral part of this fire-retardant inner resin coating layer.

10. 发明专利

JPH11237536A COATED OPTICAL FIBER 失效
公开(公告)号：JPH11237536A
公开(公告)日：1999-08-31
申请号：JP12950298
申请日：1998-04-22
申请人： TOYOKUNI DENSEN KK
发明人： NAGASE YOICHI , TAMURA HAJIME
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To provide a coated optical fiber with excellent cold resistance and fire resistance at a low cost by constituting it by an ultraviolet-setting resin layer for covering the outer peripheral part of an optical fiber and a mixed resin layer for which polyvinyl chloride resin and polyester elastomer are mixed for covering the outer peripheral part of the ultraviolet-setting resin layer. SOLUTION: This coated optical fiber 1 is constituted of the optical fiber 2 whose diameter is 125 microns, the ultraviolet-setting resin layer 3 whose outer diameter dimension is 250 microns for covering the outer peripheral part of the optical fiber 2 and the mixed resin layer 4 whose outer diameter dimension is 500-900 microns for covering the outer peripheral part of the ultraviolet ray setting resin layer 3. For the mixed resin layer 4, the one for which the polyvinyl chloride resin and the polyester elastomer are mixed and the mixing ratio is 3:7-7:3 corresponding to the using purpose is used. The coated optical fiber 1 of such a structure is provided with both of the cold resistance and the fire resistance by the mixed resin layer 4 and is manufactured at a low cost.

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