Glass roving

Property Polyester/ Glass Mat Polyester/ Woven Glass Qoth Epoxy/ Woven Glass Cloth Epoxy/ Filament Wound Glass Rovings... 

Filament winding, 26 767, 768 of thermosetting resins, 19 558 Filament-winding resin-impregnated glass rovings, 20 117 Filament yarns, 11 250 acrylic, 11 212 Filiform corrosion, 7 174 Filled fibers, encapsulation spinning of, 16 26... 

ISO 2558 1974 Textile glass chopped-strand mats for reinforcement of plastics -Determination of time of dissolution of the binder in styrene ISO 2559 2000 Textile glass - Mats (made from chopped or continuous strands) -Designation and basis for specifications ISO 2797 1986 Textile glass - Rovings - Basis for a specification... 

ISO 15039 2003 - Textile-glass rovings - Determination of solubility of size... 

Gantrez Fibrous glass roving Johns-Manville... 

The major reinforcing phase is typically continuous glass roving, which is a bundle composed of 1000 or more individual filaments. The most common glass roving used... 

Spray-Up. Instead of hand lay-up, continuous glass roving and liquid resin are fed into a gun, which chops the glass fiber, mixes it with the resin, and sprays it into the mold. This can be automated for lower labor cost and greater uniformity. Spraying is often followed by hand-rolling to expel air and density the assembly. Then it is allowed to stand until cured. Products are similar to those from simple hand lay-up. 

Additional runs were made for E-glass rovings at 50 C and 60 C, and for S-glass rovings at 60 C. 

Dissolution of magnesium and silicon in water from E-glass rovings at k0°, 50 , and 60°C after different time periods is shown in Figures 1 and 2, in which the dissolved amounts are in milligrams of these components per liter (equivalent to parts per million by weight). The dissolutions were relatively rapid in the early stage, but the rate tapered off with time. 

As with S-glass rovings. Mg (or MgO) was more readily leached out than Si from E-glass, i.e., the relative amounts of Mg and Si dissolved in water were higher than those of the solid phase. For instance, after 200 hours at 50 C, the Mg/Si weight ratio in the water is approximately 0.37 against a Mg/Si weight ratio of 0.107 in the solid phase. 

Fisure 1. Dissolution of magnesium from E-glass rovings in water (temperature ... 

Figure 7. Magnesium concentration changes in water vs, time (log — log plot) S-glass rovings (temperature 30°, 40°, 50°, 60°C).

In the presence of water, magnesium is preferentially leached out from both S-giass and E-glass rovings (compared to silicon and aluminium). 

Hybon 2011 Rovings. [PPG Industries/ Fiber Glass Prods.] Glass roving reinforcement for polyester and vinyl ester resin systems for pultrusion applies. 

Star Rov . [Manville] Fiber glass roving for filament udnding, trusion, weaving. 

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