Title:
OPTICAL FIBER CORE WIRE, METHOD OF REMOVING COATING FROM OPTICAL FIBER CORE WIRE AND PROCESS FOR PRODUCING OPTICAL FIBER PART
Document Type and Number:
WIPO Patent Application WO/2004/019103
Kind Code:
A1
Abstract:
Optical fiber core wire (1) comprising optical fiber open wire (2) and, sequentially provided on the circumference thereof, primary coating layer (3a) and secondary coating layer (3b) both constituted of a urethane base ultraviolet hardenable resin. The thicknesses of primary coating layer (3a) and secondary coating layer (3b) are in the range of 60 to 200 μm and 20 to 300 μm, respectively. The pulling force for simultaneously removing the primary coating layer (3a) and secondary coating layer (3b) is 100 gf or less. The tensile strength of primary coating layer (3a) is in the range of 0.5 to 1 MPa. The swelling ratio of primary coating layer (3a) after immersion in a solvent is in the range of 5 to 150%. The Young’s modulus of secondary coating layer (3b) is in the range of 100 to 1500 MPa. This optical fiber core wire allows to have the coatings thereof removed without deterioration of the strength or other properties of optical fiber open wire and can avoid remaining of coating waste on the surface of optical fiber open wire after coating removal operation.
Inventors:
SHIRAISHI KEIKO (JP)
MURASE TOMOTAKA (JP)
NAKAMURA NAHOKO (JP)
OHNEDA SUSUMU (JP)
ITOH MITSUO (JP)
TABATA MITSUHIRO (JP)
NAGASE RYO (JP)
YANAGI SHUICHI (JP)
IWANO SHINICHI (JP)
MIYAKE TAISEI (JP)
TAKEUCHI HIROKAZU (JP)
FUNABIKI NOBUO (JP)
MURASE TOMOTAKA (JP)
NAKAMURA NAHOKO (JP)
OHNEDA SUSUMU (JP)
ITOH MITSUO (JP)
TABATA MITSUHIRO (JP)
NAGASE RYO (JP)
YANAGI SHUICHI (JP)
IWANO SHINICHI (JP)
MIYAKE TAISEI (JP)
TAKEUCHI HIROKAZU (JP)
FUNABIKI NOBUO (JP)
Application Number:
PCT/JP2003/010572
Publication Date:
March 04, 2004
Filing Date:
August 21, 2003
Export Citation:
Assignee:
SHOWA ELECTRIC WIRE & CABLE CO (JP)
NIPPON TELEGRAPH & TELEPHONE (JP)
NIPPON ELECTRIC GLASS CO (JP)
SHIRAISHI KEIKO (JP)
MURASE TOMOTAKA (JP)
NAKAMURA NAHOKO (JP)
OHNEDA SUSUMU (JP)
ITOH MITSUO (JP)
TABATA MITSUHIRO (JP)
NAGASE RYO (JP)
YANAGI SHUICHI (JP)
IWANO SHINICHI (JP)
MIYAKE TAISEI (JP)
TAKEUCHI HIROKAZU (JP)
FUNABIKI NOBUO (JP)
NIPPON TELEGRAPH & TELEPHONE (JP)
NIPPON ELECTRIC GLASS CO (JP)
SHIRAISHI KEIKO (JP)
MURASE TOMOTAKA (JP)
NAKAMURA NAHOKO (JP)
OHNEDA SUSUMU (JP)
ITOH MITSUO (JP)
TABATA MITSUHIRO (JP)
NAGASE RYO (JP)
YANAGI SHUICHI (JP)
IWANO SHINICHI (JP)
MIYAKE TAISEI (JP)
TAKEUCHI HIROKAZU (JP)
FUNABIKI NOBUO (JP)
International Classes:
G02B6/02; G02B6/245; (IPC1-7): G02B6/44; G02B6/00; G02B6/36
Foreign References:
| JPS6299711A | 1987-05-09 | |||
| JPH11202174A | 1999-07-30 | |||
| JPH0422242B2 | 1992-04-16 | |||
| JPS5828703A | 1983-02-19 | |||
| US20020039472A1 | 2002-04-04 | |||
| JP2002182066A | 2002-06-26 | |||
| JP2001051158A | 2001-02-23 | |||
| JP2000039543A | 2000-02-08 |
Attorney, Agent or Firm:
Moriya, Kazuo (Watanabe and Company Lots Wako Bldg., 1-13,
Nihonbashi-Honcho 3-chom, Chuo-ku Tokyo, JP)
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