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Two Penetrant Jet Ink

IP.com Disclosure Number: IPCOM000048392D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 13K

Publishing Venue

IBM

Related People

Fluty, PE: AUTHOR [+2]

Abstract

An aqueous jet printing ink is disclosed containing ethylene glycol monobutyl ether, a volatile penetrant, and low molecular weight polyalkylene glycol, a non-volatile penetrant. With the loss of water by evaporation during use, the volatile penetrant is also lost by evaporation, leaving the polyalkylene glycol, which provides continuing good ink-function in the depleted mixture.

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Two Penetrant Jet Ink

An aqueous jet printing ink is disclosed containing ethylene glycol monobutyl ether, a volatile penetrant, and low molecular weight polyalkylene glycol, a non- volatile penetrant. With the loss of water by evaporation during use, the volatile penetrant is also lost by evaporation, leaving the polyalkylene glycol, which provides continuing good ink-function in the depleted mixture.

In a continuous-stream ink jet system, water and other volatile components evaporate as the ink circulates through the system for reuse. Eventually this leads to the concentration of the non-volatile components, resulting in an increased viscosity of the ink. Where the sole paper penetrant is volatile, its concentration decreases and the drying time of the ink increases. At a certain slow-drying condition, such ink is discarded.

Ink containing some UCON* lubricant 50-HB-100 as a non-volatile penetrant has an improved drying time when the ink becomes concentrated, thereby increasing character yield because the ink can be circulated longer. UCON lubricant 50-HB-100 is a polyalkylene glycol having a molecular weight in the range of 300 to 1000 grams per mole.

The printer is one which can print using ink having different viscosities. A formula of such an ink is as follows: Percent

Component by Weight

Distilled Water 77.65 SODIUM OMADINE** (biocide) 0.10 HAMP-ENE 220*** (sequestering agent) 0.20 Polyethylene glycol 200 ave. mol. wt. 5.00 (crust preventer)

N-methyl-2-pyrrolidone (dye solvent) 4.00 2MB**** (2 hydroryethyl substituted polyethpleneimine 6.00 having 7 or more nitrogen atoms per mo...