JPS6242886A - Thermal transfer recording method - Google Patents

Abstract

PURPOSE:To obtain an image excellent in weatherability, abrasion resistance, gloss and sharpness, by applying thermal transfer recording to a transparent image receiving sheet from the surface opposite to an observation surface by using a transfer sheet. CONSTITUTION:A transparent support is used as the support of an image receiving sheet and the surface opposite to an observation surface is set to an image receiving surface and a transfer sheet is superposed to perform thermal transfer recording. Because an image is formed to the surface opposite to the observation surface as mentioned above, a problem such that scratching is generated in melt transfer by friction is eliminated and the enhancement of sensitivity by the use of low m.p. ink becomes easy. In sublimation transfer, the fading and sublimation of a sublimable dye are prevented by the light blocking and shielding of the image by the transparent support and the weatherability of the image is enhanced. Further, by using the transparent support having the smooth observation surface, the gloss, sharpness and density of the image are enhanced and the water resistance and chemical resistance of the image are also enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a transfer heat-sensitive recording method, and particularly to a transfer heat-sensitive recording method that provides images with excellent weather resistance, abrasion resistance, gloss, and clarity.

(Prior Art) In recent years, facsimiles and the like have developed significantly, and thermal recording methods have been widely adopted as their recording methods. especially,
As described in Japanese Patent Publication No. Sho 1lj-144032, etc., leuco dyes such as listal violet lactone and phenolic compounds such as bisphenol nato are applied (7
The thermal recording system, which uses a combination of thermal paper and a thermal head, has improved sensitivity due to improvements in the thermal paper and thermal head2, and has come to be used in a wide range of applications, including the field of high-speed recording.

However, there are problems such as image storage stability, recording reliability (tamperability), and difficulty in recording in multiple colors. Transfer-type thermal recording methods have been introduced as one way to solve these problems. .

Transfer thermal recording methods can be classified into sublimation transfer thermal recording methods and melt transfer thermal recording methods (including current transfer thermal recording methods).

The sublimation transfer thermal recording method is suitable for halftone recording, but the sublimation dye used as the coloring material generally has poor weather resistance, and even if an image receiving sheet coated with a dye-affinity substance is used, the image cannot be recorded. When a sheet is stored for a long period of time, the image density decreases due to dye fading, sublimation, migration, etc. In order to improve the weather resistance of the image, a method has been used in which a polyester film or the like is further laminated on top of the image on the image receiving paper, but this method is complicated and expensive.

The melt transfer thermal recording method is not necessarily suitable for intermediary recording like sublimation transfer, but it does not require the use of sublimation dyes as coloring materials, and a wide variety of dyes and pigments can be used. It is possible to obtain images with excellent color tone and weather resistance. However, since the image is formed using a molten material containing a colorant, there is a drawback that the abrasion resistance of the image is poor.

Furthermore, in order to further improve the precision of melt transfer, it is necessary to lower the melting point of the transfer ink or improve the smoothness of the image receiving sheet, but both of these methods reduce the abrasion resistance of the image. This is the direction of
There are many practical problems.

OBJECTS OF THE INVENTION It is therefore an object of the present invention to provide a thermal recording method that does not have these drawbacks.

(Structure of the Invention) As a result of various studies to solve the problems with conventional transfer heat-sensitive recording, the present inventor used a transparent support as the support of the image-receiving sheet, and the opposite surface to the observation surface was used as the image-receiving surface. They discovered that the problems of conventional transfer heat-sensitive recording could be easily solved by stacking transfer sheets and performing transfer heat-sensitive recording, and developed V.
It has been discovered that new advantages not previously seen can be imparted to

Since the image is formed on the opposite side to the observation surface, there is no problem with the abrasion resistance of the image, which is a problem especially in melt transfer, and it becomes easy to increase the sensitivity by using low melting point ink. In the case of sublimation transfer, the image is shielded from light by the transparent support to prevent fading and sublimation of the sublimable dye, thereby improving the weather resistance of the image.

Furthermore, by using a transparent support with a smooth observation surface, the gloss, clarity, and density of the image are improved.

The water resistance and chemical resistance of images are also improved.

The transparent support for the image-receiving sheet used in the present invention includes:
Films such as polyester, polystyrene, polyethylene, polypropylene, polyamide, polycarbonate, polyvinyl chloride, polyvinylidene chloride, ethylene-vinyl acetate copolymer, acetyl cell o-, x, regenerated cellulose, transparent paper such as tracing paper, impregnation processing Transparent paper, glass plate, polymethyl methacrylate plate,
etc. can be used. The transparent support may contain an ultraviolet absorber, an antistatic agent, etc. to improve the light resistance of the image.

The ink transfer surface of the transparent support is coated with various materials to improve transfer density, prevent uneven transfer, improve transfer efficiency, and improve ink adhesion.
Adhesives such as polyester, polyamide, polyvinylpyrrolidone, polyethylene, polyvinyl acetate, polystyrene, polyvinyl chloride, styrene-butadiene copolymer, polyurethane, acetylcellulose, polyvinyl alcohol, starch, gelatin, etc., within the range that does not impede the transparency of the support. Pigments such as silica and alumina, waxes such as carnauba wax, paraffin wax, fatty acid amide, polyamide, and polyethylene, ultraviolet absorbers,
An antistatic agent, a color tone adjusting agent such as a phenolic resin, a chelating agent such as a polyvalent metal salt, etc. may be applied. When using transfer paper coated with leuco dye, clay, phenolic resin, bisphenol, p-hydroxybenzoic acid ester -! - It is necessary to apply a color developer such as - to the ink transfer surface.

When using a transparent support such as polyester that has an affinity for sublimable dyes for sublimation transfer recording, it is also possible to use it as it is without coating. In this case, after transfer recording, the support may be dyed with a sublimable dye by heat treatment. On the viewing side of the transparent support, anti-reflection, anti-static, writability, releasability, and
Adhesive for feed suitability, image weather resistance improvement, etc.
Pigments, ultraviolet absorbers, antistatic agents, and other additives may be applied.

After transfer recording, a transparent or opaque sheet such as a film or paper may be attached to the transfer recording surface. When sheets with high whiteness and opacity are laminated, images with high clarity can be obtained, and when sheets with no air permeability such as polyester film are laminated, image durability improves in the case of sublimation transfer recording. do. Characters, lines, marks, patterns, etc. may be printed on the opposite side of the bonded sheet. It is also possible to perform magnetic ink printing.

After transfer recording, an adhesive may be applied to the transfer recording surface. In this case, if there is no peelability on the observation surface side, it is necessary to perform a peeling process.

Letters, lines, patterns, marks, etc. may be printed on the observation surface side of the image receiving sheet, or printed with ink. Characters, lines, patterns, marks, etc. may be printed on the transfer recording surface of the image receiving sheet in a transfer recording manner.

The transfer thermal recording method of the present invention is used in facsimiles, terminal printers, video printers, barcode printers, etc., and is used for monochrome or multicolor documents, labels, commuter passes, membership tickets, credit cards, OHPs, transmitted light displays, etc. It is possible to record.

The recording method, transfer sheet, and image-receiving sheet used in the present invention include those described in Japanese Patent Application Laid-open No. 1997-471. t4A! No., Tokukai Sho Gutata r
tVO issue, JP-A Sho data/307≠3, JP-A Sho j/
-/ J41C4 Yumi No., Tokukai Shoj/-/Hari o No., Tokukai Sho R/-44012 No., Tokukai Shoj3-3μm3 Ko No., Tokukai Sho! J-413!31, JP-A-131310
No., JP-A-17-Jirr≠, JP-A-5ir-i3t
trda, JP-A No. 11-/Ko341P1, JP-A-Sho J6
-Tariri No. 0, Tokukai Show II-/II Ko 17, Toku Kai Sho! L-Co/7J Taco No. 1, Tokukai Sho ZR-IRT Kota No. 1,
Tokukai Show 1! -101179, JP-A-5R-itrty
No. o, JP-A Sho, t7-, tjJPj, JP-A ShojF-1
No. 09319, JP-A-Sho jl-2//4tYt, JP-A-Sho! Tarco Ohiro No. 23, JP-A-Sho tr-/773-RI-J, JP-A-Sho tF-44tJYO, JP-A-Sho 1'? -1tj
twu issue, Tokukai Sho JY-R 7it issue, Tokukai Sho! Tar/
147ri No. 7, JP-A-JT-1141JJ-RI, JP-A-60-2321, JP-A-Sho! Tarr Live Lambda No. 2, Tokukai Akira! Tarri JjPj issue, Tokukaisho! 2-/Kai J'F, Tokukai Sho≠r-iodtao, Tokukai Sho 4I Taichikoda 3
7, JP-A-Sho SR-2007-3, etc. can be used.

(Embodiments of the Invention) Example/A coating containing 2.1 parts (solid content) of colloidal silica and 1 part (solid content) of styrene-butadiene copolymer latexco after corona treatment on a polyester film having a thickness of at μ. 117 m2 (solid content) of the liquid was applied to form an image receiving sheet.

Using transfer sheets of three colors, cyan, magenta, and yellow, which are coated with a 17 μm thick condenser paper and a 3 μm thick ink containing a colorant and wax as a main component, the transfer sheets are reversely applied to the coated surface of the image-receiving sheet. Images were sequentially transferred and recorded in three colors to form a color image.

Next, an opaque polyester film coated with an adhesive is pasted onto the transfer recording surface. When observed from the opposite side to the transfer recording surface, the image density, sharpness, and gloss were extremely high compared to the transfer recording image using art paper as the image-receiving sheet, and there was no problem in scratch resistance.

Example λ After corona treatment on a polyester film with a thickness of IOθμ,
A coating solution consisting of 2.1 parts (solid content) of colloidal silica and 7.1 parts (solid content) of water-soluble polyester resin was coated in f/m2 (solid content) to prepare an image-receiving sheet.

Thick/7t1 capacitor""! Using a transfer sheet of three colors, cyan, magenta, and yellow, coated with 0,117 m2 of ink containing sublimable dye and ethyl cellulose as main components on '- and a-, the image-receiving sheet was A reverse image of three colors was sequentially transferred and recorded on the coated surface to form a color image.

Next, titanium white and ethylene-vinyl acetate copolymer were applied to the transfer recording surface, and a polyester film was thermally laminated. When observed from the opposite side of the transfer recording surface,
The image density, sharpness, and gloss are extremely high compared to the transferred recorded image using image-receiving paper coated with the above-mentioned image-receiving sheet coating liquid made of colloidal silica and water-soluble polyester at 2 f/m2 on high-quality paper. friend. Furthermore, when the image was irradiated with a mercury lamp for 3 hours, the image density of the image-receiving paper coated on high-quality paper decreased by 10 to 1.0 (IIVC), whereas the image-receiving sheet of the present invention had an original image density of θ The above was maintained.

-l 0- Example 3 After corona treatment, a polyester film with a thickness of 41μ was coated with a coating solution consisting of colloidal silica λ, part I (solid content), and 5 parts of ethylene-vinyl acetate copolymer (solid content).
m2 (solid content) was coated to prepare an image receiving sheet.

Cyan consisting of a resistance heating layer mainly composed of polycarbonate and carbon black, an aluminum vapor-deposited conductive layer, a release layer mainly composed of modified polyethylene, an ethylene-vinyl acetate copolymer, and an ink layer μ layer mainly composed of a colored pigment. Using electrically conductive heat-sensitive transfer sheets of three colors: , magenta, and yellow, a reverse image of the three colors was sequentially transferred and recorded on the coated surface of the image-receiving sheet to form a color image. Next, white adhesive paper was laminated onto the transfer recording surface. When observed from the opposite side to the transfer recording surface, the image density, sharpness, and gloss were extremely high compared to the transfer recording image using bond paper as the image receiving paper.

Patent applicant: Fuji Photo Film Co., Ltd. - / l - Showa to year ur + 1, Incident indication: Showa 4Q, patent application No. 113203
No. 2, Title of the Invention Relationship with the Transfer Thermal Recording Method 3, Supplementary IE Case Applicant Address 21 Nakanuma, Minamiashigara City, Kanagawa Prefecture (No. 1 Contact Address: 〒+06 Bunch P 762 F' Nishima, 3m-ku, Tokyo) No. 1126, No. 30, 4, Subject of the amendment Column 5, "Detailed Description of the Invention" of the specification, Contents of the amendment The specification is amended as follows.

l) Page 3, line 7 "Accuracy" "sensitivity" and correct it.

Claims (1)

[Claims] A transfer heat-sensitive recording method characterized in that heat-transfer recording is performed on a transparent image-receiving sheet from the opposite side of the viewing surface using a transfer sheet.