| abstract |
A polymer sheet includes a polyurethane core. The polyurethane core has a first major surface and a second major surface opposite the first major surface. The polymer sheet can have at least one functional layer overlying a major surface. The polymer sheet has a thickness t PS . The polyurethane core has a thickness t PC . In embodiments t PC can at least 0.3 of t PS . The polyurethane core can have at least one feature selected from the group: n(i) an elasticity as measured according to the Thin Gauge Elasticity Test of not more than 30 %, n(ii) a loss of tensile strength of not greater than 30% when exposed to UV light according to standard SAE J1960 (Rev. August 2003), n(iii) a thickness of polyurethane core t PC of not greater than 0.2 mm, n(iv) an elongation at break of at least 200 %, and n(v) a tensile strength at break of at least 0.3MPa. |