Coating formula of non-carbon carbon paper color development face for aqueous ink jet printing bar code symbol

Abstract

The present invention relates to the technical field of carbonless papers, in particular to a coating formula for a color-developing side of a carbonless paper used in the aqueous ink jet printing of bar code symbols. Calculated according to weight portions, the coating formula contains the following ingredients: 700 to 900 portions of water, 2 to 10 portions of dispersant, 15 to 40 portions of activated clay, 50 to 70 portions of kaoline, 90 to 110 portions of calcium carbonate, 125 to 140 portions of laminating adhesive, 20 to 30 portions of color-developing resin, 3 to 10 portions of polyvinylpyrrolidone, 3 to 5 portions of optical brightener and 2 to 5 portions of foam suppressor. The carbonless paper coated with the coating formula can be easily stored, and when aqueous ink is adopted to jet-print the carbonless paper coated with the coating formula to print bar code symbols, the problems of the diffusion and deep permeation of the aqueous ink on the coating of the carbonless paper and the nicks on the edges of ink lines can be effectively resolved, so that the quality of the reflection curve of a bar code can come up to the class A of the national standard.

Description

Technical field: [0001] The invention relates to the technical field of carbonless copy paper, in particular to a coating formula for the color surface of the carbonless copy paper used for water-based inkjet printing of barcode symbols. Background technique: [0002] At present, carbonless copy paper is widely used in commercial forms such as banking, taxation, telecommunications, post and telecommunications, insurance, etc. for its advantages of easy use, clean hands, large number of copies, clear handwriting; convenient processing, neat overprinting; especially suitable for computer printing. Invoices, forms and documents for food, beverages, etc. With the expansion of the scope of use of carbon-free paper, part of it is used to print barcode symbols. At present, there are three types of barcode symbol printing: laser inkjet printing, ink printing, and water-based ink printing. Water-based ink printing is low in cost and environmentally friendly, but carbonless copy paper...

AI Technical Summary

Problems solved by technology

With the expansion of the scope of use of carbon-free paper, part of it is used to print barcode symbols. At present, there are three types of barcode symbol printing: laser inkjet printing, ink printing, and water-based ink printing. Water-based ink printing is low in cost and environmentally friendly, but carbonless copy paper high requirements

Using the current carbon-free copy paper to print barcode symbols with water-based ink, the quality of the barcode reflection curve cannot reach the national standard A level.

[0003] In many patents and documents, the coating formula of the color-developing surface of carbonless copy paper is disclosed respectively as: 1. European patent EP. The paint formula of the color surface, the paint formula of the color surface of the carbonless copying paper has a fast color development speed and a high color concentration, but the color produced by the paint formula of the color surface of the carbonless copy paper will fade and change in sunlight Huang; 2, Japanese Patent Publication (A) flat 4-118280 discloses a kind of coating formula and preparation method thereof that take starch as complexing agent and add the color surface of carbonless copy paper of various inorganic substances, The price of the color developer is relatively cheap, but it is not easy to preserve; 3. The U.S. Schenectady company has produced a coating formula for the color surface of HRJ-13205 carbonless copy paper. It is obtained by condensation of salicylic acid, alkyl substituted phenol, formaldehyde and metal compounds as raw materials. It is currently an ideal coating formula for the color surface of carbonless copy paper.

However, the paint formulation of the color surface of the carbonless copy paper still has the disadvantages of being difficult to preserve and slow color development at low temperatures.

[0004] The various shortcomings of the paint formulation on the color surface of the above-mentioned carbonless copy paper, the carbonless copy paper coated with the paint formulation on the color surface above, and spray-print this carbonless copy paper with water-based ink to make barcode symbols, water-based The ink is easy to diffuse and penetrate deeply on the coating, forming gaps on the edge of the ink line, etc., so that the quality of the barcode reflection curve cannot reach the national standard A level