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Composite thermal transfer sheet and thermal transfer image-receiving sheet
| Details |
Inventors: Hirano, Toshifusa; Hayashi, Masafumi;
Assignee: Dai Nippon Printing Co., Ltd. (Tokyo-to, JP)
Primary Examiner: Hess; Bruce H.
Assistant Examiner:
Attorney, Agent or Firm: Ladas & Parry
A composite thermal transfer sheet 100 comprising: a thermal transfer film 10 comprising a base film 11 and a heat-fusible ink layer 13 formed on the base film 11; and a thermal transfer image-receiving sheet 20 comprising a substrate 21 and a receptor layer 22 formed on the substrate 21, the receptor layer 22 comprising a thermoplastic resin, which has an adhesive property, and an inorganic and/or organic filler, the receptor layer 22 and the heat-fusible ink layer 13 being peelably bonded to each other by the adhesive property of the thermoplastic resin in the receptor layer 22, so that the thermal transfer film 10 and the thermal transfer image-receiving sheet 20 are peelably bonded to each other. |
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DETAILED DESCRIPTION It is therefore an object of the present invention to provide a composite thermal transfer sheet and a thermal transfer image-receiving sheet, in which a thermal transfer film and the thermal transfer image-receiving sheet can be peelably bonded to each other by an adhesive property of the receptor layer of the thermal transfer image-receiving sheet, and in which the ability of ink reception and the ability of ink fixation can be improved, and in which printing energy can be reduced, namely, the printing sensitivity can be improved, and which prevents to occur background pollution by preservation for a long period or preservation in a condition of high temperature.
According to the present invention, the above mentioned object can be achieved by a composite thermal transfer sheet having a thermal transfer film constructed of a base film and a heat-fusible ink layer formed on the base film; and a thermal transfer image-receiving sheet constructed of a substrate and a receptor layer formed on the substrate, the receptor layer composed of a thermoplastic resin having an adhesive property and an inorganic and/or organic filler, the receptor layer and the heat-fusible ink layer being peelably bonded to each other by the adhesive property of the thermoplastic resin in the receptor layer, so that the thermal transfer film and the thermal transfer image-receiving sheet are peelably bonded to each other.
As mentioned above, since the adhesive property is given to the receptor layer of the thermal transfer image-receiving sheet, it is prevent that an ink of the heat-fusible ink layer of the thermal transfer film is easily transferred to the thermal transfer image-receiving sheet when the composite thermal transfer sheet is preserved for a long period, or it is preserved in a condition of high temperature.
Thus, background pollution can be prevented.
Further, the filler of the receptor layer adjusts the adhesive property and prevents the heat energy supplied to the thermal transfer film from passing through the thermal transfer image-receiving sheet to the side of the substrate thereof
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