Coextruded polymeric article and method of making the same

A polymeric sheet article comprising:

• a first strip having a plurality of rails projecting from a first surface of a base sheet;
• at least two adjacent rails of the plurality of rails having a top portion forming a cap that overhangs both sides of the rail overhangs at least one side of the rail, the caps each having a cap width, (CW);
• a gap located between the caps on the adjacent rails, wherein a gap width, (G), is wider than the cap width, (CW);
• a cavity located between the two adjacent rails with an adhesive located in the cavity;
• and
• a periodic secondary cap member located on at least one the plurality of rails, wherein the periodic secondary cap member comprises a localized depression on a top surface of the cap or on a top surface of the rail.

A polymeric sheet comprising:

• a first strip having a plurality of rails projecting from a first surface of a base sheet;
• at least two adjacent rails of the plurality of rails having a top portion forming a cap that overhangs both sides of the rail, the caps each having a cap width, (CW);
• a gap located between the caps on the adjacent rails, wherein a gap width, (G), is wider than the cap width, (CW);
• a cavity located between the two adjacent rails with an adhesive located in the cavity;
• and
• a periodic secondary cap member located on at least one the plurality of rails, wherein the plurality of rails comprises a first outer rail that is un-capped, a second outer rail that is un-capped, and middle rails with caps.