Dry erase writing board and method

Abstract

This invention relates to a dry erase writing board. The dry erase writing board comprises a chalk or erase board having a face side, and a multilayer film which is adhered to the face side of the chalk or dry erase board. The outer or exposed surface of the multilayer film which is adhered to the chalk board or erase board is a clear dry erasable layer comprising at least one fluorocarbon polymer. The invention also relates to a method of preparing the dry erase writing boards of the invention which utilizes a multilayer film having an adhesive layer for adhering the multilayer film to the chalk or erase board and a pattern of non-adhesive material forms embedded into the upper or lower surface of the adhesive layer, or adhered to the lower surface of the adhesive layer. The dry erasable multilayer films described herein are easily applied to substrates such as a chalk or erase board with little or no formation of visible bubbles or wrinkles in the film.

1 . A method of converting a chalk board to a dry erase writing board or of rejuvenating a dry erase writing board surface comprising
 (A) providing a chalk board or an erase board having a face side,   (B) providing a dry erasable multilayer film comprising
 (B-1) a clear dry erasable layer having an upper surface and a lower surface and comprising at least one fluorocarbon polymer; 
 (B-2) an opaque polymer film having an upper surface and a lower surface wherein the upper surface of an opaque polymer film is laminated to the lower surface of the dry erasable layer; 
 (B-3) a continuous layer of an adhesive having an upper surface and a lower surface wherein the upper surface of the adhesive layer is adhered to the lower surface of the opaque polymer film; and 
 (B-4) a pattern of non-adhesive material forms which is
 (B-4a) embedded into the upper surface of the adhesive layer, each of said non-adhesive material forms in the upper surface of the adhesive layer having a top surface wherein the top surfaces of the non-adhesive material forms are even with or below the plane of the upper surface of the second adhesive layer; or 
 (B-4b) embedded into the lower surface of the adhesive layer, each of said non-adhesive material forms in the lower surface of the adhesive layer having a bottom surface, wherein the bottom surfaces of the non-adhesive material forms are either even with, above or below the plane of the lower surface of the adhesive layer; or 
 (B-4c) adhered to the lower surface of the adhesive layer, and 
 
   (C) applying the multilayer film to the chalk or dry erase board with the lower surface of the second adhesive layer of the multilayer film in contact with the face side of the chalk or dry erase board.   
   
   
       2 . A method of converting a chalk board to a dry erase writing board or of rejuvenating a dry erase writing board surface comprising
 (A) providing a chalk board or an erase board having a face side,   (B) providing a dry erasable multilayer film comprising
 (B-1) a clear dry erasable layer having an upper surface and a lower surface and comprising at least one fluorocarbon polymer; 
 (B-2) a layer of clear first adhesive having an upper surface and a lower surface wherein the upper surface of the adhesive is adhered to the lower surface of the dry erasable layer; 
 (B-3) an opaque polymer film having an upper surface and a lower surface wherein the upper surface of an opaque polymer film is in contact with the lower surface of the first adhesive layer; 
 (B-4) a continuous layer of a second adhesive having an upper surface and a lower surface wherein the upper surface of the second adhesive layer is adhered to the lower surface of the opaque polymer film; and 
 (B-5) a pattern of non-adhesive material forms which is
 (B-5a) embedded into the upper surface of the second adhesive layer each of said non-adhesive material forms in the upper surface of the adhesive layer having a top surface wherein the top surfaces of the non-adhesive material forms are even with or below the plane of the upper surface of the second adhesive layer; or 
 (B-5b) embedded into the lower surface of the second adhesive layer, each of said non-adhesive material forms in the lower surface of the adhesive layer having a bottom surface, wherein the bottom surfaces of the non-adhesive material forms are either even with, above or below the plane of the lower surface of the adhesive layer; or 
 (B-5c) adhered to the lower surface of the adhesive layer, and 
 
   (C) applying the multilayer film to the chalk or dry erase board with the lower surface of the second adhesive layer of the multilayer film in contact with the face side of the chalk or dry erase board.