| Davis-Standard Corp., USA, has further developed its optical fibre cable portfolio by introducing two extrusion systems that are suitable for premise cable production, the DSF-100 tight-buffer extrusion line and the DSF-110 premise cable extrusion line. The DSF-100 tight-buffer extrusion line is capable of line speeds up to 600m/min and is equipped with an automatic fibre pay-off and take-up system for continuous production. This line can produce conventional tight-buffered products, as well as semi-tight buffer designs. In addition, the line can be used for thin wall sheathing of small diameter optical fibre cables. These products are typically coated with PVC, PA and HFFR, but other compounds can be used as required.
The DSF-110 premise cable extrusion line can produce Simplex, Duplex and Zipcord cables that contain either aramid or glass yarn reinforcement for added strength. This system can also manufacture distribution cables with up to 24 tight buffers that are stranded in an SZ configuration with helically and longitudinally applied aramid elements. These cables can be manufactured with or without a central strength member. Break out cables can be processed with up to 12 elements, and stranded in either an SZ (DSF-110-SZ) or helical (DSF-110-HS) construction with a central strength member. These products are typically jacketed with PVC or HFFR materials. Line speeds range from 300m/min for a Simplex cable to 30m/min for a 12-fibre cable construction. Other cable constructions and increased production speeds can be achieved with minor changes or additions in line components.
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