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High adhesion thermal ink jet ink

A thermal inkjet, ink composition technology, applied in inks, household appliances, applications, etc., can solve the problems of long drying time and poor adhesion of inks

Pending Publication Date: 2018-07-17
VIDEOJET TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such water-based inks suffer from one or more disadvantages such as long ink drying times or poor adhesion to semi-porous or non-porous substrates such as plastics

Method used

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  • High adhesion thermal ink jet ink
  • High adhesion thermal ink jet ink
  • High adhesion thermal ink jet ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This example illustrates an embodiment of a thermal inkjet ink composition using methyl ethyl ketone as a solvent. The materials used in the preparation of the inkjet ink compositions, their amounts in percent and formulation numbers are listed in Table 1 below. Nobel DHX 3-4 is a nitrocellulose resin with a weight average molecular weight of about 42,000. Joncryl 682 is a styrene / acrylic copolymer with a weight average molecular weight of about 1700. Ad Pro MTS is a sulfonamide modified epoxy polymer with a weight average molecular weight of about 1700. K-Plast 1022 is a urethane polymer with a weight average molecular weight of about 7500. DC Silicone resin is a silicone resin with a weight average molecular weight of about 2500. Poly-4-hydroxystyrene resin is a branched polymer with a weight average molecular weight of about 2500. Paraloid B-66 is an acrylic polymer with a weight average molecular weight of about 70,000.

[0061]

[0062] Table 2 shows the av...

Embodiment 2

[0066] This example illustrates an embodiment of a thermal inkjet ink composition using an ethanol-based solvent. The materials used in the preparation of the inkjet ink compositions, their amounts in percent and formulation numbers are listed in Table 3 below. Nobel DLX 3-5 is a nitrocellulose resin available from Nobel Enterprises. Mowital LPB 16H is a polyvinyl butyral resin available from Kuraray America.

[0067] table 3

[0068]

[0069] Table 4 shows the % drop weight loss for the ink formulations in Table 3 measured as previously described as a function of the number of drops fired per nozzle. It can be seen that Formulations 6259, 6271 and 6322 are sufficiently resistant to fouling to be able to fire at least 10 million drops per nozzle in a thermal inkjet printer without a drop weight loss of more than 10%.

[0070] Table 4

[0071]

Embodiment 3

[0073] This example illustrates an embodiment of a thermal inkjet ink composition using a mixture of ketone and alcohol based solvents. The materials used in the preparation of the inkjet ink compositions, their amounts in percent and formulation numbers are listed in Tables 5-8 below.

[0074] table 5

[0075]

[0076] Table 6

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[0078] Table 7

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[0080] Table 8

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[0082]

[0083] The Composite Adhesion Score is the average of the Rub Adhesion Test and Scratch Adhesion Test scores. The image was printed on a BOPP film substrate commercially used to wrap confectionery. Friction adhesion was tested as follows. A controlled-weight rub tester was constructed using a conventional technique glue rub tightly covered by a thin leather-suede material. A 1 kg steel weight is fixed to the bottom of the covered eraser. A leather surface with a constant 1.0 x 0.5 inch contact area was then brought into contact with 1 inch of the printed code i...

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Abstract

A thermal ink jet ink composition includes one or more volatile organic solvents, wherein the one or more volatile organic solvents comprise a solvent selected from C1-C4 alcohols, C3-C6 ketones, C3-C6 esters, C4-C8 ethers, and mixtures thereof. The one or more volatile organic solvents are present in an amount at least 60% by weight of the ink composition. The ink composition includes one or morebinder resins present in an amount from 1% to 10% by weight of the ink composition, and one or more dyes. If water is present, it is present in amount less than 5% by weight of the ink composition. The ink composition includes less than 2% by weight of any humectant and / or wetting agent with a relative evaporation rate less than 0.3. The ink composition is suitable for use in a thermal ink jet printer.

Description

Background of the invention [0001] Thermal inkjet (TIJ) printheads produce ink droplets by thermal vaporization of ink solvents. During ejection, the resistor is heated rapidly to create air bubbles, which then eject droplets from the orifice. This process is extremely efficient and repeatable. Modern TIJ print heads for industrial graphics applications are capable of producing uniform droplets with volumes of 4 pL or less at frequencies up to 36 kHz or higher. Typical commercially available TIJ devices are specifically designed to vaporize water or solvents with physical properties close to water (eg, high boiling point, large heat capacity, low molecular weight). [0002] Typical TIJ printers print very well on porous absorbent or semi-absorbent materials or certain kinds of non-porous materials such as those used for controlled drug devices. However, as these printing systems are integrated into a wider variety of production environments, the different types of primary p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/102C09D11/328C09D11/36C09D11/106
CPCC09D11/102C09D11/106C09D11/328C09D11/36
Inventor Z.薛D.菲尔科K.哈维M.科兹S.丁达尔
Owner VIDEOJET TECH INC
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