Optical fiber filling Jelly

Short Description:

The optical fiber cable industry manufactures optical fiber cables by encasing the optical fibers in a polymeric sheathing. A jelly is placed between the polymeric sheathing and the optical fiber. The purpose of this jelly is to provide water resistance and as a buffer to bending stresses and strains.Typical sheathing materials are polymeric in nature with polypropylene (PP) and polybutylterepthalate (PBT) being the most commonly used sheathing materials. The jelly is usually a non-Newtonian oil.

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Products Description

The non-Newtonian nature allows the jelly to thin out during processing and set after the processing shear forces are removed. Critical parameters that impart the necessary performance are viscosity at various shear rates and the yield stress. Typically the jelly is made using oil and an inorganic or organic thickener. Inorganic thickeners used range from organic clays to silica. These thickeners are suspended in a hydrophobic oil such as a mineral oil or synthetic oil. Additionally, stabilizers may be incorporated to ensure oxidative stability of the mixture.

Characteristic

● XF-400 is compatible with acrylic resin coatings and polymer materials for fiber and cable applications.

● It is recommended that all polymer materials in contact with the paste be tested for compatibility during use.

● The XF-400 is designed for a cold fill process that avoids voids due to paste shrinkage.

Technical Specifications

Parameter	Representative Value	Test Method
Appearance	Colorless and Semitransparent	Visual inspection
color stability@ 130°C / 120hrs	<2.5	ASTM127
density (g/ml)	0.83	ASTM D1475
flashing point (°C)	> 200	ASTM D92
dropping point (°C)	>200	ASTM D 566-93
penetration @ 25°C (dmm)	440-475	ASTM D 217
@ -40°C (dmm)	>230	ASTM D 217
viscosity (Pa.s @ 10 s^-1 25°C)	4.8+/-1.0	CR Ramp 0-200 s^-1
(Pa.s @ 200 s^-1 25°C)	2.6+/-0.4	CR Ramp 0-200 s^-1
oil separation @ 80°C / 24 hours (Wt %)	0	FTM 791(321)
volatility@ 80°C / 24 hours (Wt %)	<1.0	FTM 791(321)
oxidation induction time(OIT)@ 190°C (min)	>30	ASTM 3895
acid value (mgKOH/g)	<0.3	ASTMD974-85
Hydrogen evolution amount 80°C/24hours(µl/g)	<0.02
water-resistance (20°C/7days)	pass	SH/T0453a