专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明专利

JPS62102210A OPTICAL FIBER CORE 失效
公开(公告)号：JPS62102210A
公开(公告)日：1987-05-12
申请号：JP24138085
申请日：1985-10-30
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SHIYUDO YOSHITO , TAKEUCHI YOSHIAKI , YAMAMOTO FUMIO
IPC分类号： G02B6/44 , C03C25/10
摘要： PURPOSE:To obtain an optical fiber core having a high bending characteristic by forming the orientation distribution of a secondary coat in its radius direction so that the orientation is relatively low in an outer surface part separated from a strand and it is relatively high in the inside of the coat layer. CONSTITUTION:A fiber strand 2 is supplied from a fiber strand feeder 1 and coated with thermoplastic resin at a part fed from a cross head die 3. The thermoplastic resin 5 for secondary coat is sheared by shearing force during the passage of it through a straight part 4 of the die 3 and pulled down at a part fed from the die 3, so that the resin 5 is highly efficiently orientated by the shearing force and extending force and applied to the surface of the fiber strand. After completing the coating processing, the temperature of the secondary coat layer is dropped less than a crystal/liquid crystal transfer point by air cooling, and after fixing the orientation, the outer surface part of the core is heated by an electric heater 6 and then solidified by a cooling tank 7. Then, the solidified fiber is wound around a core winder 8 as a core. Since the orientation distribution of the secondary coat layer of the optical fiber is formed so that the orientation on the outer surface part is low and that of the inside of the coat layer is high, the bending characteristic is remarkably improved as compared to an ordinary secondary coat layer.

22. 发明专利

JPS6241221A COPOLYESTER 失效
公开(公告)号：JPS6241221A
公开(公告)日：1987-02-23
申请号：JP18119285
申请日：1985-08-19
申请人： NIPPON TELEGRAPH & TELEPHONE , MITSUBISHI CHEM IND
发明人： YAMAMOTO FUMIO , SHIYUDO YOSHITO , NOZAWA SEIICHI , KIDAI OSAMU , KASAI ATSUSHI
IPC分类号： C08G63/00 , C08G63/60 , C08G63/66
摘要： PURPOSE:A copolyester excellent in rigidity, strength, etc., and suitable for fibers, etc., containing dicarboxylic acid units, glycol units, hydroxycarboxylic acid units and aromatic diol units at a specified molar ratio. CONSTITUTION:A dicarboxylic acid unit (A) of formula I (wherein R is 1,4- phenylene or the like), glycol unit (B) of formula II (wherein R is a 1-20C bivalent aliphatic hydrocarbon or the like), a hydroxycarboxylic acid unit (C) of formula III (wherein R is 1,4-phenylene or the like) and an aromatic diol unit (E) of formula IV (wherein R is bivalent aromatic hydrocarbon or the like) are incorporated so that part of component C and part of component B may be bonded together through an ether bond to form a unit (D) of formula V, and the relationships VI, VII, VIII, IV and X may hold among the amounts (mol) of the components. The obtained copolyester should have a logarithmic viscosity >=0.3dl/g as measured in a phenol/tetrachloroethane mixture (1:1wt.) at 0.5g/dl and 30 deg.C.

23. 发明专利

JPS60249110A OPTICAL FIBER CORE CLAD WITH LAYER OF LOW LINEAR EXPANSION COEFFICIENT 失效
公开(公告)号：JPS60249110A
公开(公告)日：1985-12-09
申请号：JP10467384
申请日：1984-05-25
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAMOTO FUMIO , SHIYUDOU YOSHITO , YAMAKAWA SHINZOU
IPC分类号： C03C25/10 , G02B6/44
摘要： PURPOSE:To obtain an optical fiber core capable of cladding with high speed and having superior transmission efficiency causing only small loss and high reliability for a long range of the length and being produced with inexpensive cost by cladding secondarily a thermoplastic resin exhibiting crystallinity in the molten state on the external periphery of an optical fiber strand consisting of an optical fiber and a primary clad layer. CONSTITUTION:Any liquid crystal polymer may be used for the thermoplastic resin of the secondary cladding material so far as it has / deg.C coefft. of linear expansion under the cladding condition. Specific examples are a thermotropic liquid crystal consisting of polyethylene terepthalate (PET) and p-oxybenzoic acid (POB). From the view point of easiness in handling the optical fiber core and alpha and the behavior of contraction at high temp, the preferred range of the POB content in the PET/POB copolymer is 40-80mol%. If such copolymer is used, a slow cooling stage is unnecessary but the cooling may be performed by quenching for a short time. Thus, high speed cladding has become realized.

24. 发明专利

JPS60153013A HIGH-STRENGTH OPTICAL FIBER SINGLE-CORE CABLE 失效
公开(公告)号：JPS60153013A
公开(公告)日：1985-08-12
申请号：JP842784
申请日：1984-01-23
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAMOTO FUMIO , MURATA HISASHI , YAMAKAWA SHINZOU
IPC分类号： G02B6/44
摘要： PURPOSE:To suppress the combustibility and deformation of a plastic tube by winding a plastic tube which has a high elasticity modulus and a low coefficient of linear expansion as the secondary coating layer of a single core cable with a flame-resistant tape by pressing. CONSTITUTION:This cable is provided with an optical fiber 1, primary coating layer with a low elastic modulus, air layer 3, secondary coating layer 4 which is increased in high elastic modules and decreased in coefficient of linear expansion by being heated dielectrically and drawn, flame-resistant tape 5, and plastic sheath 6. The secondary coating layer 4 protects the optical fiber 1 and serves as a tensile strength material and a compressive material against mechanical strength which operates on the cable lengthwise. Further, there is the air layer 3 formed between the primary coating layer 2 and secondary coating layer 4, so the secondary coating layer 4 becomes flat to lateral pressure and collapses eventually. An increase in tube diameter at right angles to the lateral pressure is suppressed to increase greatly the lateral pressure at which the collapse occurs.

25. 发明专利

JPS6031866B2 失效
公开(公告)号：JPS6031866B2
公开(公告)日：1985-07-24
申请号：JP5288684
申请日：1984-03-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAKAWA SHINZO , MURATA NORIO , YAMAMOTO FUMIO
IPC分类号： C08L23/26 , C08K5/00 , C08K5/13 , C08L23/00 , C08L23/06 , C08L23/08 , C08L23/34 , C08L101/00

26. 发明专利

JPS57191054A WATERPROOF BONDING METHOD FOR LEAD MATERIAL AND POLYETHYLENE 失效
公开(公告)号：JPS57191054A
公开(公告)日：1982-11-24
申请号：JP7646281
申请日：1981-05-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AZUMA MAKOTO , YAMAKAWA SHINZOU , YAMAMOTO FUMIO
IPC分类号： C08J5/12 , B29C55/00 , B29C65/00 , B29C65/48 , B32B15/08 , B32B15/085 , C09J5/02

27. 发明专利

JPS57188323A MANUFACTURE OF HEAT SHRINKABLE TAPE 失效
公开(公告)号：JPS57188323A
公开(公告)日：1982-11-19
申请号：JP7395081
申请日：1981-05-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MURATA NORIO , YAMAKAWA SHINZOU , YAMAMOTO FUMIO
IPC分类号： B29C49/00 , B29C55/00 , B29C55/02 , B29C61/06
摘要： PURPOSE:To manufacture a heat shrinkable tape having high heat shrinking force and excellent crack resistance by orienting and processing a polymer composition consisting of a middle and low pressure method linear low density polyethylene and a vinyl acetate copolymer or the like at a temperature lower than its melting point. CONSTITUTION:A polymer composition consisting mainly of 30-98pts.wt. of a linear low density polyethylene, 70-2pts.wt. of ethylene-vinyl acetate copolymer or an ethylene-ethyl acrylate copolymer and additionally 0.1-5.0pts.wt. of an antioxidant is crosslinked so that its crosslinking degree becomes more than 25% of gel fraction, and is then oriented and processed at a temperature lower than the melting point of the composition. In this manner, a heat shrinkable tape hving high heat shrinking force and excellent crack resistance can be manufactured.

28. 发明专利

JPS54120894A THERMALLY FUSABLE ADHESIVE TAPE FOR CONNECTING THE COMMUNICATION CABLE SHEATH 失效
公开(公告)号：JPS54120894A
公开(公告)日：1979-09-19
申请号：JP2777578
申请日：1978-03-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKEDA KAZUTOKI , KUBOTA YOSHINORI , YAMAMOTO FUMIO , YAMAKAWA SHINZOU
IPC分类号： C09J7/00 , H02G15/013 , H02G15/08
摘要： PURPOSE:To control the temperature of thermaly fusable adhesive accurately during the heating work, by arranging a heat sensitive agent which changes color within specific temperature range in bead or in stripe into thermally fusable adhesive tape layer. CONSTITUTION:A heat sensitive agent 2 which changes color within the temperature range of 110-170 deg.C is arranged in bead or in stripe into thermally fusable adhesive layer 1, 1' composed of ethylene-ethylacrylate copolymer or the compound of said copolymer and polyethylene which is used generally for connecting the sheath of cable. The heat sensitive agent 2 changes, for example, from colored state to transparent state at the predetermined temperature within said temperature range, thereby the heating temperature of the adhesive tape 1 can be monitored easily and controlled accurately.

29. 发明专利

JPS5457541A METHOD OF ADHESION BETWEEN METAL OR INORGANIC MATERIAL AND POLYOLEFIN 失效
公开(公告)号：JPS5457541A
公开(公告)日：1979-05-09
申请号：JP12299277
申请日：1977-10-15
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AZUMA MAKOTO , YAMAKAWA SHINZOU , YAMAMOTO FUMIO
IPC分类号： B32B15/04 , B29C55/00 , B29C65/00 , B29C65/40 , B29C65/48 , B32B9/00 , B32B15/08 , B32B15/085 , C08J5/12 , C09J5/00 , C09J5/02
摘要： PURPOSE:Metal materials are coated with a primer containing an organic peroxide and a specific organic silane and laminated with a polyolefin by laying a specific intermittent layer of ethylene-vinyl acetate copolymer between them and heating to strengthen the adhesion. CONSTITUTION:The surface of inorganic materials such as metal like tin or glass is coated with a primer containing an organic silane bearing olefinic double bonds such as vinyltrimethoxysilane and an organic peroxide of the formula (R1-R3 are 1-18C alkyl) such as dicumyl peroxide. Then an ethylene-vinyl acetate copolymer and/or ethylene-ethyl acrylate copolymer is laid as an adhesive between the metal material and a polyolefin material and the adhesion is effected by heating.

30. 发明专利

JPS5364795A PLASTIC CABLE SHEATH JOINT 失效
公开(公告)号：JPS5364795A
公开(公告)日：1978-06-09
申请号：JP13904776
申请日：1976-11-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAMOTO FUMIO , YAMAKAWA SHINZOU , FUKUI ICHIROU , TSUDOME SHINJI , AZUMA MAKOTO
IPC分类号： H02G15/013 , H02G15/08 , H02G15/18
摘要： PURPOSE:To achieve long term withstandability of plastic sheathed cable joint against moisture, by performing thermally soluble jointing utilizing hydrogen sulfide treated solder galvanized lead sleeve or thermally soluble addhesives containing sulfur powder.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式