B - Operations – Transporting – 41 – M
Patent
B - Operations, Transporting
41
M
42/15
B41M 5/132 (2006.01) B41L 1/36 (2006.01)
Patent
CA 1103022
PRESSURE-SENSITIVE CARBONLESS TRANSFER SHEETS USING NOVEL HOT MELT SYSTEMS AND PROCESS FOR THE PRODUCTION THEREOF Gerald T. Davis, Gerhart Schwab and Dale R. Shackle Abstract of the Disclosure A pressure-sensitive carbonless transfer sheet comprising a paper substrate having a front and back surface and a coating composition adhered to at least one of the front and back surfaces of the paper substrate. The coating composition is set to a flexible, tack-free coat, and the coating composition includes a solvent free non-aqueous hot melt suspending medium which is characterized by being substantially water insoluble, being characterized by being substantially water insoluble, being characterized by the presence of one or more functional groups selected from the group consisting of: carboxyl, carbonyl, hydroxyl, ester, amide, amine, heterocyclic groups and combinations thereof to impart polarity thereto and having a melting point of from about 60°C. to about 140°C. and a melting point range of lessthan about 15°C. In addition the coating composition includes an encapsulated, chromogenic material which is substantially dis- persed therein, the hot melt suspending medium being compatible with the color forming characteristics of the capsular chromogenic material. This invention further includes a liquid chromogenic coating composition which comprises a hot melt suspending medium in combination with a microencapsulated chromogenic material. The chromogenic material is a color precursor of the electron donating type which is mixed with a carrier oil to form an oil solution of the chromogenic color precursor material which is then com- bined with one or more wall forming compounds. A novel process is provided for producing a pressure-sensitive carbonless transfer sheet which comprises the steps of preparing a hot melt suspending medium, the hot melt suspen- ding medium being water insoluble and having a melting point of from about 60°C. to about 140°C. and a melting point range of less than about 15°C. A microencapsulated chromogenic material is prepared and dispersed in the hot melt suspending medium, the chromogenic material being a color precursor of the electron donating type. A coating dispersion is prepared by combining the hot melt suspending medium with the micro- encapsulated chromogenic color precursor material, the hot melt suspending medium being compatible with the color forming or developing characteristics of the chromogenic material. The coating dispersion is then applied to a substrate, the coating dispersion being applied at a coat weight of from about 1.0 pounds to about 8.0 pounds per 3300 square feet of substrate at a coat thickness of from about 1 micron to about 50 microns. The coated substrate is set by cooling the coating dispersion. -2-
277564
Davis Gerald T.
Schwab Gerhart
Shackle Dale R.
Ridout & Maybee Llp
The Mead Corporation
LandOfFree
Pressure-sensitive carbonless transfer sheets using novel... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure-sensitive carbonless transfer sheets using novel..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure-sensitive carbonless transfer sheets using novel... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-539619