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Protective and decorative sheet material having a transparent topcoat

  • US 5,215,811 A
  • Filed: 12/20/1990
  • Issued: 06/01/1993
  • Est. Priority Date: 04/28/1988
  • Status: Expired due to Term
First Claim
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1. A protective and decorative sheet material for use in a thermoforming process in which it is stretched and bonded to a three-dimensional substrate, said material comprising:

  • a flexible and stretchable, thermoformable polymeric carrier film;

    a stretchable, thermoformable paint layer adhered to one surface of said carrier film;

    said paint layer comprising a polymeric binder and a colorant or substantially flat light reflective flakes or both;

    a transparent polymeric topcoat overlying said paint layer, said topcoat comprising (a) a rubbery cushioning layer of a stretchable and thermoformable polymeric composition which is non-crosslinked or of low crosslink density and has a glass transition temperature below 20°

    C. and (b) a crosslinked surface layer of higher glass transition temperature; and

    said sheet material having an unextended state prior to being thermoformed;

    said sheet material being heat softenable to a state in which it is thermoformable over irregular surfaces to an extended state having an area at least 50% greater than that of the unextended state.

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