PBO is a unique conjugated rigid rod-shaped molecule in structure.The molecular structure is highly symmetrical, which gives PBO fiber excellent mechanical and thermal properties. The tensile strength reaches 5.8GPa, the thermal decomposition temperature is 650°C, and the limiting oxygen index is greater than 68%. Due to its unique molecular structure and special manufacturing process, PBO fiber has the characteristics of ultra-high strength, ultra-high modulus, high temperature resistance and high thermal environment stability. It has excellent overall performance and is known as the 21st century super fiber. The application field of Chopped PBO fiber is mainly in the civil field, such as: rubber reinforcement, tunnel and bridge concrete reinforcement. SH-PBO chopped is divided into SHCG-PBO-HS (high strength type) according to different production processes and product uses. Three types of fibers: SHCG-PBO-HS (high strength), SHCG-PBO-HM (high modulus) and SHCG-PBO-NR (heat-resistant type).

The following is the parameter list of these three types of chopped PBO .

Items	Units	SHCG-PBO-HM	SHCG-PBO-HS-1	SHCG-PBO-HS-2	SHCG-PBO-NR
Density	g/cm³	1.56±0.01	1.54±0.01	1.54±0.01	1.54±0.01
Single fiber diameter	m	11-14	11-14	11-14	11-18
Tensile strength (dry yarn)	cN/dt	27.5-35	33-38	30-33	<30
Tensile strength (impregnated wire)	Gpa	≥5.5	≥5.8	≥5.0	--
Tensile modulus (dry yarn)	cN/dt	1200-1500	850-1100	750-1000	--
Tensile modulus (impregnated wire)	Gpa	210-280	155-180	140-180	--
Elongation at break	%	2.0-3.0	3.0-5.0	3.0-5.0	--
Moisture regain	%	0.6	2	2	2
Decomposition temperature (N₂)	℃	650	650	650	650
LOI (limiting oxygen index)	%	68	68	68	68

Property of chopped PBO fiber

Excellent strength & modulus
Good flame resistance
Excellent thermal stability
Excellent creep resistance
Good chemical resistance

Disadvantages of chopped PBO fiber

• Very poor UV resistance

• Poor compressive strength

• Strength loss in exposure to strong acids

Excellent heat resistance and flame retardancy. Ordinary fibers will decompose in high temperature environments, while PBO fibers can resist decomposition even in extremely high temperature environments (650°C). PBO fiber maintains high durability at 500°C. The durability, heat resistance and elastic modulus of PBO fiber are quite strong, which is the highest among organic fiber products on the market.

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Chopped PBO Fiber

What is chopped PBO fiber?

Property of chopped PBO fiber

Disadvantages of chopped PBO fiber

What are the applications of chopped PBO fiber ?