Reinforcement for asphaltic paving, method of paving, and process for making a grid with the coating for asphaltic paving
View Patent ↗A composite material comprises: an open grid comprising at least two sets of strands. Each set of strands has openings between adjacent strands. The sets are oriented at a substantial angle to one another. A tack film is laminated to the open grid. The tack film has first and second major surfaces, such that a material of the tack film at its first and second major surfaces is a material including about 50% or more of resinous non-asphaltic component and about 50% or less of asphaltic component.
1. A reinforcing product for asphaltic paving comprising:
first and second non-woven polymer substrates;
a non-woven layer of reinforcing fibers sandwiched between the non-woven polymer substrates, wherein the non-woven layer of reinforcing fibers comprises yarns; and
an adhesive applied on the yarns, the adhesive consisting essentially of a single application of the adhesive, wherein the adhesive impregnates the yarns to bind the yarns and coats the yarns, and wherein the adhesive joins the non-woven layer of reinforcing fibers to the non-woven substrates, said adhesive being activated at a paving temperature, pressure, or both, to form a bond compatible with asphaltic paving, wherein said adhesive, based upon the weight of the dry ingredients, comprises:
40-60 wt % pvc-acrylic latex;
5-25 wt % ethylene-acrylic acid latex;
0.1-1 wt % organic oil/silica defoamer;
0.5-5 wt % carbon black dispersion;
1-5 wt % EBS anti-blocking wax dispersion;
1.5-10 wt % acrylic solution polymer;
0.05-2 wt % non-ionic surfactant;
0.05-1 wt % fluorosurfactant; and
0.25-5 wt % polyacrylic acid thickener.
2. The reinforcing product of claim 1 , wherein said non-woven layer of reinforcing fibers includes a fiber glass scrim including at least a first set of yarns oriented substantially in a machine direction.
3. The reinforcing product of claim 2 , wherein the fiber glass scrim further includes at least a second set of yarns oriented substantially in a cross direction.
4. The reinforcing product of claim 1 , wherein said yarns comprise E-glass filaments.
5. The reinforcing product of claim 1 , wherein the non-woven polymer substrates comprise polyester.
6. A method for forming a reinforcing product for asphaltic paving, comprising the steps of:
coating a non-woven layer of reinforcing fibers comprised of yarns, said coating consisting essentially of a single application of an adhesive, said adhesive being activated at a paving temperature, pressure, or both, to form a bond compatible with asphaltic paving, the single application of the adhesive impregnating the yarns to bind the yarns, wherein said adhesive, based upon the weight of the dry ingredients, comprises:
40-60 wt % pvc-acrylic latex;
5-25 wt % ethylene-acrylic acid latex;
0.1-1 wt % organic oil/silica defoamer;
0.5-5 wt % carbon black dispersion;
1-5 wt % EBS anti-blocking wax dispersion;
1.5-10 wt % acrylic solution polymer;
0.05-2 wt % non-ionic surfactant;
0.05-1 wt % fluorosurfactant; and
0.25-5 wt % polyacrylic acid thickener; and
laminating the non-woven layer of reinforcing fibers to first and second non-woven polymer substrates.
7. The method of claim 6 , further comprising feeding one of the non-woven polymer substrates through a coating pan with the non-woven layer of reinforcing fibers.