Fiberglass: Strength and Thermal Stability

Key Features of Fiberglass: 

  • Good tensile strength & modulus
  • Excellent thermal properties
  • Good chemical resistance
  • Good flame resistance
  • Good electrical insulation

Fiberglass is produced into several forms and utilized in a vast array of composite and industrial applications.  It is often used in thermoset and thermoplastic applications where the fiber is used as reinforcement.  The mass production of glass fibers began in the 1930’s.

Large furnaces are used to melt silica sand, limestone, and various other minerals to liquid form.  The liquid is then extruded through bushings and are coated (sized) to help bundle the filaments and prepare the fibers for composite resin interface. E-Glass typically is utilized for its high modulus properties as S-Glass has a higher breaking tenacity.

FIBER-LINE® Enhancing Processes
 for Fiberglass:

FIBER-LINE® Fiberglass Products:

Common Types & Sizes
FIBER-LINE® works with a variety of fiberglass suppliers & sizes

Fiberglass Bare Fiber Performance

Abrasion Resistance
Yarn on Yarn Abrasion
Ultraviolet (UV) Resistance
Flame Resistance
Chemical Resistance (Acid)
Chemical Resistance (Alkali)
Chemical Resistance (Organic Solvent)

Fiberglass Data


Property UOM Value
Breaking Tenacity g/d 6.0 - 7.3
Specific Gravity Ratio 2.58
Elongation @ Break % 3.5
Tensile Modules g/d 200 - 275
Moisture Regain* % <0.03
Creep** % 10.0 - 20.0
Skrinkage*** % 0
Melt Point 846

S- Glass

Property UOM Value
Breaking Tenacity g/d 6.7 - 9.4
Specific Gravity Ratio 2.48
Elongation @ Break % 5.5
Tensile Modules g/d 140 - 170
Moisture Regain* % <0.03
Creep** % 5.0 - 15.0
Skrinkage*** % 0
Melt Point 1056

* Equilibrium moisture regain @ 55% RH    ** Creep @ 40%-58% ultimate tensile strength    *** Shrinkage in dry air @ 177 C for 30 minutes

This data is provided for informational purposes only, and does not constitute a specification. FIBER-LINE makes no warranty, express or implied, that the product conforms to these values. Contact your FIBER-LINE representative for exact product details which conform to your specific requirements.