In January 2004, PPG Corporation of the US introduced a special roving for roving. The new type of glass fiber reinforced material is 748#, which has a high shear strength and a wide range of applications. It can be used for polyester and vinyl. Various ester resins and epoxy resins.
The company also developed a special adhesive for use with this roving, which allows the resin and fiber to bond together very well, resulting in higher interlaminar shear strength. At the same time, the rovings also have good resin wettability and saturability so that the properties of the cross-sections of the pultruded products can all maintain good uniformity.
This type of roving-free roving has a wider applicability to the resin than the directly-drawn roving roving, and thus the application range of the product is wider. Due to the precise control of the diameter of the roving and its good bonding effect, it can meet the performance requirements of the construction industry for composite materials.
The production process of this special roving is to first draw the glass fiber, wind it in small strands around an intermediate winding bobbin, and then wind it on the original bobbin of the roving. Compared with the directly wound roving, the latter is drawn directly after the raw yarn is drawn in a fluffy state.
The company also developed a special adhesive for use with this roving, which allows the resin and fiber to bond together very well, resulting in higher interlaminar shear strength. At the same time, the rovings also have good resin wettability and saturability so that the properties of the cross-sections of the pultruded products can all maintain good uniformity.
This type of roving-free roving has a wider applicability to the resin than the directly-drawn roving roving, and thus the application range of the product is wider. Due to the precise control of the diameter of the roving and its good bonding effect, it can meet the performance requirements of the construction industry for composite materials.
The production process of this special roving is to first draw the glass fiber, wind it in small strands around an intermediate winding bobbin, and then wind it on the original bobbin of the roving. Compared with the directly wound roving, the latter is drawn directly after the raw yarn is drawn in a fluffy state.
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