A composite used for light control or privacy

Details A composite used for light control or privacy A composite used for light control or privacy

G - Physics

02

B

G02B 5/00 (2006.01) G02B 5/04 (2006.01) H01J 29/89 (2006.01)

Patent

CA 2190969

A composite including a polymeric film having a first generally planar major surface and an opposite second major surface defined by a multiplicity of elongate parallel contiguous ridge portions. The ridge portions each have a generally triangular cross section and elongate obscured and transmitting second major surface portions intersecting at the apex of the ridge with the obscured second major surface portion being on the side of the ridge generally facing a first end of the sheet and the transmitting second major surface portions being on the side of the ridge portions adjacent a second end of the sheet. The film can provide visual transmission between its first major surface and the transmitting second major surface portions while coatings along the obscured second major surface portions prevent viewing of visual images through the film; whereas the composite can also provide light transmission between the first major surface and the transmitting second major surface portions, while the coatings along the obscured second major surface portions restrict light transmission.

Composite comprenant un film polymère doté d'une première surface principale généralement plane et d'une seconde surface principale opposée définie par une multiplicité de nervures allongées, contiguës et parallèles. Chacune de ces nervures présente une section généralement triangulaire et définit des parties allongées, obscurcies et des parties transparentes de la seconde surface principale, qui s'entrecoupent au sommet de la nervure, les parties obscurcies se trouvant du côté de la rainure qui est généralement opposé à une première extrémité de la feuille et les parties transparentes se trouvant du côté adjacent à une seconde extrémité de la feuille. Ce film permet une transmission visuelle entre sa première surface principale et les parties transparentes de la seconde surface principale, tandis que des revêtements appliqués le long des parties obscurcies de cette seconde surface empêchent de voir des images à travers le film. Ce composite peut également assurer la transmission de la lumière entre la première surface principale et les parties transparentes de la seconde surface principale, tandis que les revêtements appliqués le long des parties obscurcies limitent la transmission lumineuse.

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