Dimensionally stable floor panel

A floor panel composition comprising:

• a top layer;
• a base layer having an upper base layer of uniformly mixed material of uniform thickness, and a lower base layer of uniformly mixed material of uniform thickness, and an intermediate base layer of uniformly mixed material of uniform thickness;
• the upper base layer includes a first distinct layer and a second distinct layer of material, the first layer abutting the second layer, each layer having
• a first composition of polyvinyl chloride, a limestone filler, a plasticizer, and a heat stabilizer selected from the group consisting of calcium stearate, zinc stearate, and calcium/zinc combined complex soap system, present in an amount greater than 3.0, and up to 5.0 parts per 100 parts of the polyvinyl chloride, the filler of the upper base layer being 300-400 parts per 100 parts of the polyvinyl chloride, and the plasticizer of the upper base layer being 25-35 parts per 100 parts of the polyvinyl chloride;
• the lower base layer having
• a second composition with a higher content of polyvinyl chloride and plasticizer than the first composition of the polyvinyl chloride, the limestone filler, and the plasticizer, the filler of the lower base layer being 200-300 parts per 100 parts of the polyvinyl chloride and the plasticizer of the lower base layer being 35-55 parts per 100 parts of the polyvinyl chloride;
• the intermediate base layer includes a first distinct layer and a second distinct layer of material, the first layer abutting the second layer, each layer positioned between a glass fiber section and the lower base layer, the first layer and the second layer of the intermediate base layer having a third composition comprising polyvinyl chloride, limestone filler, plasticizer, and heat stabilizer, the third composition having a content of polyvinyl chloride and plasticizer that is between that of the first composition and the second composition;
• and
• the glass fiber section positioned directly between the upper base layer and the intermediate base layer, the glass fiber section is a veil of glass fibers in the ranges of 10 gram/m2 to 25 gram/m2 and are coated with a composition consisting of polyvinyl plastisol;
• and
• a backing layer positioned opposite the top layer such that the base layer is positioned between the top layer and the backing layer, a bottom portion of the backing layer having a plurality of uniform grooves positioned along a length of the backing layer;
• the floor panel composition further comprising a protrusion prepared on one side of the base layer and extending outward beyond the top layer, the protrusion having a top surface and a tapered surface which are both formed from the glass fiber section.