The fiber optic protection tube, also known as air casing or fiberless tube, is made of imported ethylene tetrafluoroethylene copolymer (ETFE) and processed through advanced technology. The fiber protection tube retains the excellent properties of ETFE copolymer such as heat resistance, flame retardant and insulation, providing the best protection for 250μm fiber and other special fiber.

 

 

 

• Flame retardant rating to the highest flame retardant rating UL94V-0
• Remains soft at low temperatures
• Maintains perfect performance at 150°C for long term operation

 

 

• Protects the bare fiber from mechanical damage
• Effectively prevents corrosion of the fiber by water vapor, fuel, acids and solvents to ensure the transmission performance of the fiber
• Can be used in environments subject to abrasion, high voltage electromagnetic fields or nuclear radiation, as well as in medical equipment
• It can easily pass through bare fiber lengths up to 5m

 

 

Inner Diameter（μm）	Outer Diameter（μm）	Concentricity	Non-circularity
500.0±50.0	900.0±50.0	＜6%	＜3%

 

 

Material flame retardant level	UL94V-0&RoHS
Heat shrink @85℃, 4 hours	≤2.0%
Materials	Performance	Numerical value	Test Method
ETFT	Bending modulus（MPa）	641.1	ASTM D790
	Tension strength（23℃）（MPa）	37.9	ASTM D1708
	Elongation at break（23℃）（%）	＞300	ASTM D1708
	Melting point（℃）	220～255	ASTM D3159
	Extreme Oxygen Index	34	ASTM D2863

 

 

Operating Temperature（℃）	Static Bending Radius（mm）	Storage Temperature（℃）	Dynamic Bending Radius	Installation Temperature（℃）
-55~+150	10X Tight Bushing Diameter	-40~+80	20X Tight Bushing Diameter	-20~+50

 

 

	Blue	BU		orange	OR		green	GN
	Brown	BR		gray	GY		white	WHT
	Red	RD		black	BK		yellow	YW
	purple	VT		pink	PN		Ice green	LB

 

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