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Thermal transfer printing

A transfer sheet and heating gas technology, applied in transfer materials, transfer printing, rotary printing machines, etc., can solve problems such as poor printing quality, and achieve good printing quality and uniform dye transfer effect

Inactive Publication Date: 2010-05-26
AKZO NOBEL COATINGS INT BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in poor overall print quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0076]Form a test image with a consistent neutral gray background. The test images were printed on Pictaflex film sheets using Artainium UV+ inks in an Espon 4400 inkjet printer (Epson is a trademark). This image was transferred to two different substrates in a press as described above. The swing of the blades is sinusoidal with a period of 5 seconds.

[0077] Substrate A) is a 0.5 mm thick aluminum sheet coated with polyester supported on a stand 18 .

[0078] Substrate B) was a 1.8 mm thick molded polycarbonate shell coated with a retransfer varnish in the manner described in US Patent 7,102,660. The shell is supported on a silicone rubber nest 22 and is preheated by running a retransfer cycle without components.

[0079] The pressure conditions are as follows:

[0080] test number

[0081] test number

[0082] The optical density of the transferred image was measured on a grid covering the width and height of each part.

[0083] test number...

example 2

[0086] The test image was formed using narrow vertical and horizontal solid black lines arranged on a consistent half-inch grid test pattern. The test images were printed on Pictaflex film sheets using Artainium UV+ inks in a Mimaki JV5-130S inkjet printer (Mimaki is a trademark). The image was transferred to a 0.5 mm thick polyester covered aluminum sheet in a press as described above. The pressure conditions are as follows:

[0087] test number

[0088] The percent increase in width and height of the transferred image was measured.

[0089] test number

[0090] This means that the moving blades produce lower deformations during the softening phase of the film compared to static diffusers.

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Abstract

Apparatus for thermal transfer printing of an image from a thermal retransfer sheet onto an article, includes heating means adapted to supply a flow of heated gas for causing dye transfer, and oscillating vane means for directing the heated gas in a direction transverse to the direction of flow, for distributing the heated gas over article(s) during dye transfer. Also disclosed is a method of printing an image, and the resulting printed article.

Description

technical field [0001] The present invention relates to thermal transfer printing, to an apparatus for thermally transferring an image from a retransfer intermediate sheet onto an article, a method of printing and an article bearing the printed image. Background technique [0002] Thermal retransfer involves forming an image (in reverse) on a retransfer intermediate sheet using one or more thermally transferable dyes. The image is then thermally transferred to the surface of the item by bringing the image into contact with the item surface and applying heat and possibly pressure. Thermal transfer printing is particularly suitable for printing on items that cannot be easily printed directly, especially three-dimensional (3D) objects. Thermal retransfer by dye diffusion thermal transfer using sublimation dyes is disclosed, for example, in WO 98 / 02315 and WO 02 / 096661. By using digital printing techniques to form the image on the retransfer intermediate sheet, it is possible ...

Claims

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Application Information

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IPC IPC(8): B41M5/035B41F16/00
CPCB41M5/0358B41F16/00B41J17/30
Inventor J·M·豪厄尔P·C·W·布彻
Owner AKZO NOBEL COATINGS INT BV
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