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Waterbased heatset offset ink compositions

A thermosetting ink technology, applied in the direction of ink, printing, printing devices, etc., can solve the problem of long drying time

Inactive Publication Date: 2007-06-13
SUN CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, drying times are still longer than those required for thermoset / indirect printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Aqueous thermoset / indirect printing inks were prepared from the components shown below:

[0037] Table I

[0038] components

[0039] The fuma rosin resin is bound to the dry pigment in a 1:1 ratio. This resin-bound pigment makes up 25% of the ink formulation. The pigment-to-base ratio of the ink is 1:15.

Embodiment 2

[0041] The viscosity and stability of the ink in Example 1 were measured. Viscosity was measured using an ink viscometer (manufactured by Thwing Albert) operating at 90°F at a speed of 1200 rpm. A tack of 17-20 was observed. In addition, the ink was observed to be stable in the ink viscometer for 10 minutes.

Embodiment 3

[0043] The ink composition of Example 1 was used to prepare a cyan ink for four-color printing thermoset printing. Run at 1,000fpm on a Diddle web press and print onto 40# coated paper. No ink buildup was observed on the rollers, plates, or blanket cylinders. At a density of 1.33, the ink dries at a web exit temperature of 265°F. Therefore, this ink has the same good drying properties as oil-based inks.

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PUM

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Abstract

Aqueous thermoset indirect lithographic inks comprising: water, polyamide resin or fumaric rosin resin, hydroxyethyl ethylene urea, modified linseed oil, dibutylated benzoguanamine, pigments and p-toluenesulfonic acid acid.

Description

field of invention [0001] The present invention relates to a water-based ink composition for thermosetting / indirect lithography process. Background of the invention [0002] The thermoset printing process was first introduced in the 1950s and is well established today in the printing industry producing magazines, catalogs and brochures. The process produces high-gloss, high-quality prints and involves drying of the printed product. [0003] In high-speed rotary indirect printing, ink is applied to both surfaces of a web substrate simultaneously. To dry the ink before the substrate contacts a solid surface, the printed or coated substrate is passed through a swing or swing type oven at stretch and rocked between pads of heated air. Upon exiting the oven, the roll must be allowed to cool before further processing such as sheeting, folding, or rewinding. Thus, the roll is passed through one or more chilled drums or rollers, ie, internally cooled drums, which reduce the tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/02C09D11/08C09D11/06B41M1/06
CPCC09D11/03C09D11/08
Inventor 拉马萨米·克里希南玛里琳·亚马特雨果·巴比亚
Owner SUN CHEM CORP