Textile glass. Rovings. Manufacture of test specimens and determination of tensile strength of impregnated rovings
Textile glass. Rovings. Manufacture of test specimens and determination of tensile strength of impregnated rovings
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1 Scope This International Standard specifies two methods for the determination of the tensile stress at break of an impregnated roving:
— a reference method using test specimens produced with moulded epoxy tabs;
— a short method using test specimens with no tabs or simple cardboard or composite tabs.
The methods are applicable to both assembled (multistrand) and direct (multifilament) rovings; nevertheless the reference method may be used for various linear densities, but the short method is described for 1 200 tex rovings only, which is the linear density that allows the fibres in the roving to spread out most easily during impregnation.
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