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公开(公告)号：JPH04232906A
公开(公告)日：1992-08-21
申请号：JP40868690
申请日：1990-12-28
Applicant: TORAY INDUSTRIES
Inventor： FUJITA ISAO , MAEDA NORINOBU , SUGANUMA HEIROKU , MATSUNAGA TADAYOSHI
Abstract: PURPOSE:To improve flexibility and light-guiding property and to prevent scratches by forming a hard coating film on the outermost part of a flexible multilayer light guide sheet having a specified sheet-type light guide layer and a coating layer. CONSTITUTION:The flexible light guide sheet consists of a sheet-type light-guide inner layer (A) and an intermediate layer (B) which covers wholly around the layer (A). The inner layer (A) consists of a polymer essentially comprising polymethyl methacrylate and having light transmitting performance, while the intermediate layer (B) consists of a fluorine polymer and has a smaller refractive index by 0.02 or more than the refractive index of the polymer of the inner layer (A). Moreover, the outermost surface is covered with a hard coating film (D). This flexible multilayer light guide sheet satisfies the conditions for its cross-sectional shape that 7
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公开(公告)号：JPH0443307A
公开(公告)日：1992-02-13
申请号：JP15242990
申请日：1990-06-11
Applicant: TORAY INDUSTRIES
Inventor： YAMAGUCHI SHIN , SANO TAKAO , FUJITA ISAO
Abstract: PURPOSE:To mold blank materials with uniform thickness by diffusing and shunting a core component polymer and a sheath component polymer by a long groove and annular grooves respectively and guiding them wholly to a molding slit and a molding exit. CONSTITUTION:The core component polymer A which is fused is injected into a core component polymer injection opening 2 and the sheath component polymer B which is fused is injected into a sheath component polymer injection opening 3. Consequently, the core component polymer A is guided to the molding exit 8 through the thin molding slit 5 while diffused and shunted to the right and left by the long groove 4. At the same time, the sheath component polymer B after being diffused and shunted by a 1st annular groove 6 is dispersed and flows in a 2nd annular groove 9 through respective small holes 7 and then the polymer while receiving the drawing resistance of a small gap flows in the molding exit 8 from the entire periphery and exits while covering the core component polymer A. Consequently, the sheet type photoconductor C which has the uniform-thickness sheet core material (a) covered with the uniform- thickness sheath component polymer (b) is obtained.
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公开(公告)号：JPH02269022A
公开(公告)日：1990-11-02
申请号：JP9154989
申请日：1989-04-10
Applicant: TORAY INDUSTRIES
Inventor： FUJITA ISAO , YAMAGUCHI SHIN , SUGANUMA HEIROKU
Abstract: PURPOSE:To eliminate a lowering of mechanical physical properties and light transmitting capacity based on the generation of a weld line by using an element disturbing the flow line of a gathered fluid. CONSTITUTION:Two flows 10, 11 of a molten viscous fluid are filtered by a filter material 14 to be gathered and an element 13 disturbing said gathered fluid is interposed in the piping of a confluent part. The element 13 disturbing the flow line of this gathered fluid is composed of a sintered metal net. By this method, the physical properties of a molded processed product are enhanced and excellent capacity is obtained and, even in a case utilized in the preparation of an optical fiber, the deterioration of light transmitting properties due to a weld line is not generated and a plastic optical fiber having good capacity is obtained.
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4.发明专利
公开(公告)号：JPH01233404A
公开(公告)日：1989-09-19
申请号：JP6167388
申请日：1988-03-14
Applicant: TORAY INDUSTRIES
Inventor： SUGANUMA HEIROKU , FUJITA ISAO
IPC: G02B6/00
Abstract: PURPOSE:To obtain a plastic optical fiber having excellent mechanical characteristics such as flexibility, high numerical aperture and excellent light transmittability and heat resistance by using a methyl methacrylate polymer as a fiber component and a copolymer of vinylidene fluoride and tetrafluoro- ethylene as a sleeve component. CONSTITUTION:The polymer essentially consisting of the methyl methacrylate is used as the fiber component and the copolymer of the vinylidene fluoride and tetrafluoroethylene contg. 81-85mol.% vinylidene fluoride is used as the sleeve component. The polymer essentially consisting of the methyl methacrylate refers to polymethyl methacrylate or a polymethyl methacrylate copolymer contg.
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公开(公告)号：JPH01161203A
公开(公告)日：1989-06-23
申请号：JP32075487
申请日：1987-12-17
Applicant: TORAY INDUSTRIES
Inventor： FUJITA ISAO , YAMAGUCHI SHIN , SUGANUMA HEIROKU
Abstract: PURPOSE:To smoothly form the title package as a sheet without being twisted or bent by mutually fusing the sheaths of plastic optical fibers having core sheath structure to form a sheet, specifying the interval between the width centers of respective sheets in the same winding layer and winding up the sheet around cheese at a fixed interval. CONSTITUTION:The sheaths of plastic optical fibers having core sheath structure are mutually fused to form a sheet and the sheets are wound up around the cheese at the fixed interval within the range of 1.1-2.0 times the fiber width W as the interval between the width centers of respective sheets in the same winding layer. Since the peeling strength of mutual constitutional fibers is high and the cheese shape is effective, an optical fiber sheet package with extremely high quality can be formed without generating wrinkles, twist, bend, etc., on the sheet.
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Patent Agency Ranking
公开(公告)号：JPH01118102A
公开(公告)日：1989-05-10
申请号：JP27651087
申请日：1987-10-30
Applicant: TORAY INDUSTRIES
Inventor： FUJITA ISAO , YAMAGUCHI SHIN , SUGANUMA HEIROKU
Abstract: PURPOSE:To obtain a plastic optical fiber sheet of high quality having high peeling strength between constitutional fibers, high flexibility or tensile strength and effective translucency by holding the welding temperature of a polymer forming a welding part within a specific range. CONSTITUTION:Spinned fibers 5 discharged from a composite spinneret 4 are converged by a U-shaped, V-shaped or drum-like converging guide 6 arranged under the spinneret 4 and having curvature, the converged fibers are mutually welded to form an optical fiber sheet 7 and the sheet 7 is wound through a drawing roll 8. In case of welding the polymer forming the outermost layer of the cross section of each fiber, the welding temperature is set up within the range of inequality I. In the inequality, Tm is the melting point ( deg.C) of the polymer forming the welding part and Tg is the glass transfer point ( deg.C) of a polymer forming a core part. Consequently, the optical fiber sheet of high quality having high peeling strength between the constitutional fibers, high flexibility or tensile strength and effective translucency can be obtained.
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公开(公告)号：JPH01114805A
公开(公告)日：1989-05-08
申请号：JP27233687
申请日：1987-10-28
Applicant: TORAY INDUSTRIES
Inventor： FUJITA ISAO , MAEDA AYANOBU , SUGANUMA HEIROKU
Abstract: PURPOSE:To enhance the exfoliation strength between the fibers of an optical fiber sheet formed by fusion splicing sheaths to each other and to intensify both the flexibility and tensile strength thereof by forming the sheath component of a polyvinylidene fluoride copolymer. CONSTITUTION:The sheaths of two-component two-layered composite fibers forming the optical fiber sheet shown in the figure consist of fiber component layers 1 and sheath layers 2 forming fusion splicing parts. The polyvinylidene fluoride is used for the sheath layers and polymethyl methacrylate, etc., are used for the fiber component layers 1. The polyvinylidene fluoride and the copolymer thereof have the high adhesiveness to the polymethyl methacrylate of the fiber layers 1 and the copolymer thereof and exhibit excellent characteristics in exfoliation property, flexibility and tensile strength.
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公开(公告)号：JPS62299912A
公开(公告)日：1987-12-26
申请号：JP14288186
申请日：1986-06-20
Applicant: TORAY INDUSTRIES
Inventor： FUJITA ISAO , TAZAWA HISASHI , MAEDA AYANOBU
Abstract: PURPOSE:To prevent a plastic optical fiber from the deterioration of optical characteristics (light transmissivity) and traveling stability by setting up the electrostatic charging voltage of the optical fiber to
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公开(公告)号：JPS60235104A
公开(公告)日：1985-11-21
申请号：JP9104584
申请日：1984-05-09
Applicant: TORAY INDUSTRIES
Inventor： MATSUNAGA TADAYOSHI , SHIN MIKIO , FUKUDA TADANORI , FUJITA ISAO
Abstract: PURPOSE:To produce a core component having excellent light transmittable performance by polymerizing a monomer to 20-70% rate of polymn. in a preliminary polymn. stage and to 90% rate of polymn. in a regular polymn. stage, respectively and removing a volatile component down to
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公开(公告)号：JPS5921738A
公开(公告)日：1984-02-03
申请号：JP13092182
申请日：1982-07-27
Applicant: Toray Industries
Inventor： MIURA TAKASHI , MAEDA HIRONOBU , FUJITA ISAO
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