Method for manufacturing a thermal transfer printing sheet and printing method

By forming a color image layer and an adhesive layer of the transferred material on the transfer substrate, the problems of color saturation and concealment in heat transfer printing on small-sized, multi-variety fabrics and leather garments are solved, achieving high print reproducibility and sufficient flexible fixing, and improving the maintainability of the equipment and printing speed.

CN122162095APending Publication Date: 2026-06-05RICOH CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
RICOH CO LTD
Filing Date
2024-09-11
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies for heat transfer printing on small-sized, multi-variety fabrics and leather garments suffer from several drawbacks, including limited selection of printed object shapes, low white toner production rates, insufficient white coverage, reduced color saturation and brightness of color images, slow printing speed, and poor equipment maintainability.

Method used

A color image layer is formed on a transfer substrate using a color image layer forming apparatus, and an adhesive layer of the transferred material with a thickness of 40 μm or greater and 120 μm or less is formed in a single printing operation by electrophotography. White toners, including polyester resin, polyurethane resin and release agent, are used to improve the adhesion and flexibility of the image.

Benefits of technology

It achieves high printing reproducibility without reducing color saturation on dark-colored transfer materials, and can fully fix images on materials with large textures and flexibility, with sufficient flexibility and strength. It solves the problems of limited selection of printed object shape, insufficient white concealment and low productivity in traditional methods.

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Abstract

A manufacturing method of a heat transfer printing sheet includes: forming, by a color image layer forming device, a color image layer on a transfer substrate; and forming, by a transferred material adhesive layer forming device using an electrophotographic method, a transferred material adhesive layer having a thickness of 40 µm or more and 120 µm or less on the color image layer in one printing operation. The transferred material adhesive layer forming device includes a plurality of developing devices, in which two or more developing devices include a white toner for forming the transferred material adhesive layer. The white toner includes a polyester resin, a polyurethane resin, and a release agent.
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