Wood-grained polymer substrate

A capped polymer substrate that simulates natural wood extending along a first direction, the capped polymer substrate having a first side and a second side spaced apart from the first side along a second direction different than the first direction, the first and the second sides defining a width of the substrate, the first and the second sides extending along the first direction, the substrate comprising:

• a first set of polymer layers extending along the first direction and containing a first colorant, a majority of the first set of polymer layers being substantially continuous along the first direction;
• a second set of polymer layers extending along the first direction and containing a second colorant different than the first colorant, a majority of the second set of polymer layers being substantially continuous along the first direction;
• a core extending between the first and the second sides and along the first direction, the core comprising a first wood-grained pattern formed of the first set of polymer layers and the second set of polymer layers, the first wood-grained pattern is exposed on outer surfaces of the core at a first end and a second end of the core, wherein individual layers of the first and the second set of polymer layers are interspersed within the core to form the first wood-grained pattern throughout the core, wherein a plurality of individual layers of one of the first and the second sets of polymer layers extend along a substantially uninterrupted curvilinear path in the second direction originating proximate the first side and terminating proximate the second side;
• a cross-section of the core exposing the first wood-grained pattern;
• and
• a cap fused onto cohere surfaces of the core, wherein the cap comprises a second wood-grained pattern formed of a copolymer.