| 摘要 |
A DROP OPTICAL FIBER CABLE 1 INCLUDES OPTICAL FIBER CORE WIRES 2, 3, TENSION MEMBERS 4, A SUPPORT WIRE 5, AND A MAIN BODY COVERING 6. THE TENSION MEMBER 4 IS COMPRISED OF AN FRP TENSION MEMBER HAVING AN FRP PORTION IN WHICH REINFORCING FIBERS ARE BOUND TOGETHER BY THERMOSETTING RESIN. THE FRP TENSION MEMBER MUST BE SUCH THAT THE AMOUNT OF STYRENE MONOMER REMAINING IN THE FRP PORTION IS 0.018 WT% OR LESS (WITH RESPECT TO THE FRP PORTION). WHEN THE REMAINING STYRENE MONOMER EXCEEDS THESE AMOUNTS, IT COMES INTO CONTACT WITH THE MAIN BODY COVERING THERMOPLASTIC RESIN IN MOLTEN STATE DURING THE MAIN BODY COVERING IN A DROP OPTICAL FIBER CABLE MANUFACTURING PROCESS, LEADING TO AN ABNORMALITY SUCH AS FOAMING IN THE COVERED PORTION, A MAIN BODY COVERING PORTION AND THE LIKE OCCURS DUE TO VOPORIZATION OF THE REMAINING STYRENE MONOMER AND THE LIKE. IT IS SUFFICIENT "TO CONTROL THE AMOUNT OF THE REMAINING STYRENE MONOMER TO A PREDETERMINED VALUE OR LESS BY SELECTING OF HIGHLY REACTIVE THERMOSETTING RESIN AND HIGHLY REACTIVE CATALYST, SECURING OF CURING TIME, POST PROCESSING AFTER THE RESIN IS CURED, AND THE LIKE.
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