Zylon® PBO

Zylon® PBO

 

Zylon® PBO fiber is composed of rigid molecular chains  [poly(p-phenylene-2,6-benzobisoxazole)]. These fibers and filaments are characterized by high tensile strength (10 times higher than steel), excellent impact energy absorption (twice that of para-aramid), and exceptional thermal stability (limiting oxygen index of 68). Zylon® PBO fiber is available in chopped fiber, staple fiber, spun yarn, and continuous filament.

I. Properties

Type Unit Regular

<AS>

 High Modulus <HM>
Filament decitex dtex 1.7 1.7
Density g/cm3 1.54 1.56
Tensile Strength cN/dtex 37 37
GPa 5.8 5.8
KSI 840 840
Tensile Modulus cN/dtex 1150 1720
GPa 180 270
MSI 26 39
Elongation at Break % 3.5 2.5
Melting Temperature °C None None
Decomposition Temperature in Air °C 650 650
Coefficient of Thermal Expansion ppm/°C – -6
Limiting Oxygen Index 68 68
Dielectric Constant at 100kHz – 3.0
Dissipation Factor – 0.001

Typical property values are not to be construed as specifications.

II. Product Availability

Type Regular <AS> High Modulus <HM>
Filament
Yarn Count (dtex) 278; 555; 1100; 1670 273; 545; 1090; 1640; 3000
Filaments (dtex) 166, 315, 664, 996, 1158, 1992 166, 315, 664, 996, 1158, 1992
Cylindrical bobbin Innerdiameter (mm) 94 94
Cylindrical bobbin Length (mm) 216 216
Chopped Fiber
Cut Length (mm) 1; 3; 6 1; 3; 6
Staple Fiber
Cut Length (mm) 44; 51; 64; 76 n/a
Spun Yarn
Yarn Count (Ne) 20/1 20/2

 

III. Flame Resistance

Zylon® Para-Aramid Meta-Aramid
warp fill warp fill warp fill
Char Length (cm) <0.5 <0.5 3 2 6 6
After Flame (sec) 0 0 0 0 0 0
After Glow (sec) 1 1 16 16 2 2
LOI 68 29 29

Vertical Flame Test – plain woven fabrics with 20’s spun yarn

IV. Applications

Chopped Fiber

  • Reinforcement for gaskets
  • Plastic reinforcement

Staple Fiber

  • Heat resistant felt
  • Media for high temperature filtration

Spun Yarn

  • Racing and riding suits
  • Protective cloth for fire-fighting
  • Heat and flame resistant welding apparel
  • Cut and abrasion resistant fabrics (gloves and safety shoes)

Continuous filament

  • Reinforcement for tires, belts, and hoses
  • Reinforcement for concrete and plastic
  • Tension member for fiber optic cables
  • High tension rope or cord
  • Ballistic vests and helmets
  • Yacht sailcloth
  • High temperature filtration

VI. Packaging

Zylon® Filament Yarn

Linear
density (dtex)		 Number
of filaments		 Type Weight
of bobbin (kg)		 Number of
bobbins/carton		 Minimum
order
278 166 AS 2.5 6 One carton
555 332 AS 5.0 6
1110 664 AS
1670 996 AS
273 166 HM 2.5 6
545 332 HM
1090 664 HM
1640 996 HM