Specialty materials

PBO filament yarn

High-Performance Fibers

PBO filament yarn

Molecular Structure & Characteristics

PBO, known in Chinese as poly(p-phenylene benzobisoxazole); its molecular structure is shown in the figure on the right.

PBO is a unique conjugated rigid rod-shaped molecule with a highly symmetrical molecular structure, which endows PBO fibers with excellent mechanical and thermal properties. Its tensile strength reaches 5.8 GPa, with thermal decomposition at 650℃ and over 68% ultimate oxygen index.

Figure 1 PBO Molecular Structure

STARAMID® CG-PBO PRODUCTS

PBO Filament

STARAMID® CG-PBO filament, according to different production and applications, is classified into STARAMID® CG-PBO-AS (high-strength), STARAMID® CG-PBO-HM (high-modulus), STARAMID® CG-PBO-NR (heat-resisting), recommended for use in winding, rope, woven fabrics, and weft free fabrics.

Figure 2 Product Characteristics of STARAMID® CG-PBO-AS and HM Filaments

Figure 3 STARAMID® CG-PBO-AS (High-Strength Type)

Figure 4 STARAMID® CG-PBO-HM (High-Modulus Type)

Figure 3 CG-PBO-AS (High-Strength Type)	Figure 4 CG-PBO-HM (High-Modulus Type)

STARAMID® CG-PBO-AS (high-strength), and STARAMID® CG-PBO-HM (high-modulus) fibers are classified by indicators such as linear density, strength, and modulus to meet customer needs, while STARAMID® CG-PBO-NR (heat-resisting) fibers are classified by their axial state and color. The names of filament products are shown in the table below.

Table 4 STARAMID® CG-PBO Filament Product Names and Descriptions

Name Composition					Specifications & Performance
Brand	Classification	Specification	Type	Linear Density	Strength (cN/dTex)	Modulus (cN/dTex)	Elongation At Break (%)	Characteristics
STARAMID®CG-PBO	AS	165T	Thick	165±8	≥33	≥850	3~5	Strength30~39 cN/dTex
		110T	Normal	110±5	≥34.5	≥900
		55T	Thin	55±3	≥35	≥1000
		28T	Thin	27.5±2	≥36	≥1100
	HM	165T	Thick	165±8	≥27.5	≥1200	2~3	Modulus1200~1650 cN/dTex
		110T	Normal	110±5	≥28	≥1400
		55T	Thin	55±3	≥28.5	≥1450
		28T	Thin	27.5±2	≥29	≥1500
	NR	1Y	—	—	Paper Bobbin + Yellow			Temperature For Long Term Usage=500℃
		2Y	—	—	No Paper Bobbin + Yellow
		1B	—	—	Paper Bobbin + Brown
		2B	—	—	No Paper Bobbin + Brown

Note: The composition of the filament product name is STARAMID® CG-PBO-classification-specification.

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