Solar control pigmented thermoplastic polymer sheet
AssigneePaltough Industries (1998) Ltd.
InventorsGuy Ben-Zvi, Fabian Rios
Life of this patent
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Abstract
A solar control light transmitting thermoplastic polymer sheet is provided which contains flakes of metal pigment that are aligned coplanar with the upper face of the sheet. The sheet transmits a controlled amount of light while reflecting a significant amount and absorbing the rest. In an alternative, the sheet has a co-extruded second layer of UV-protective thermoplastic polymer formed on top of the first layer.
Claims22
A rigid light transmitting thermoplastic polymer sheet having an upper face, the sheet comprising:
- transparent thermoplastic polymer matrix having flakes of metal pigment embedded therein, said flakes being substantially evenly dispersed within said transparent thermoplastic polymer matrix and oriented coplanar with said upper face.
A rigid light transmitting thermoplastic polymer sheet having an upper face comprising:
- a first transparent thermoplastic polymer layer;
- a second UV-protective transparent thermoplastic polymer layer co-extruded with said first layer, wherein said second layer is formed on top of said first layer;
- and
- metal pigment embedded within at least one of said first and second layers, said metal pigment being substantially evenly dispersed within said at least first and second layer and oriented co-planar with said upper face.
A method for production of a rigid light transmitting thermoplastic polymer sheet having an upper face, the method comprising the steps of:
- treating metal pigment flakes thereby to increase their surface energy;
- feeding a transparent thermoplastic polymer material and said metal pigment flakes into an extrusion line, thereby forming a melt;
- extruding said melt through an extrusion die so that said metal pigment being embedded and substantially evenly dispersed within said melt and oriented co-planar with said upper face;
- and
- solidifying said melt into a rigid sheet.
A method for production of a rigid light transmitting thermoplastic polymer sheet having an upper face, the method comprising the steps of:
- treating metal pigment flakes thereby to increase their surface energy;
- feeding a first transparent thermoplastic polymer material into a first extrusion line;
- feeding a second transparent thermoplastic polymer material into a second extrusion line;
- feeding said metal pigment flakes into at least one of said first and second extrusion lines;
- co-extruding said first thermoplastic polymer material and said second thermoplastic polymer material into a melt, whereby said second thermoplastic polymer material forms a layer on said first thermoplastic polymer material;
- extruding said melt through an extrusion die so that said metal pigment being embedded and substantially evenly dispersed within said melt and oriented co-planar with said upper face;
- and
- solidifying said melt into a rigid sheet.
Dependencies are inferred from the claim text.