JPS58104787A - Ink medium - Google Patents

Abstract

PURPOSE:To obtain the ink medium, which can increase the speed of printing and improve resolution, by forming the ink medium for transfer by a porous supporter sheet having specified physical properties and thermofusing ink filled and coated to the insides of the holes and one surface of the sheet. CONSTITUTION:The ink medium 13 is formed by filling the inside of the hole sections of the porous supporter sheet 11 with thermofusing ink 12 and shaping the ink layer of said ink 12 to the back of the sheet 11, the volume resistivity of the porous supporter sheet 11 has the value of not less than decuple as large as the volume resistivity of ink 12, and the surfaces in the hole sections of the sheet 11 are formed by a substance, critical surface tension thereof is 350 dyne/ cm or less. When signal voltage is applied to a stylus electrode 14, currents selectively flow in the vertical direction because sections among the holes are partitioned by the sheet 11 having large electric resistance, and ink 12 thermally melted is rapidly transferred efficiently to transfer paper because the critical surface tension of the inner surfaces of the hole sections is small.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer ink and stick which is rounded to an ink medium and is preferably used in a non-inject printer.

The non-impact method is known as a recording method for facsimiles, etc., and among them, the inkjet recording method is a method for converting 1"35 into an image without going through processes such as a machine and a footrest. , thermal recording method, discharge breakdown recording method, etc. are known, but except for the inkjet method, plain paper copying is the trick.The inkjet recording method also depends on (1) the heat level m VC because the ink liquid is injected. Instability of printing, nozzle clogging due to dryness, etc. (It! Poor flexibility, (2) Print head miniaturization is limiting, multi-printing is difficult, and solid state placement is difficult. 3) Since it is a dot painting using ink@, there is a viscosity limit and it is impossible to achieve ultra-high speed. (4) Since the color of the ink is dye, it fades rapidly over time and due to light. Contains shortcomings.

It is based on the above method, and is a non-impact method that allows normal and transfer, using a low melting point coloring material,
Due to this, the method of thermally transferring this coloring material is attracting attention. As for this method, 1% Public Interest No. 54-10495 discloses that a coloring material with a melting point or carbonization point of 70 to 150 degrees Celsius is applied on a cross-section using a P4BS easily cured pigment. A thermal head transfer method using a thermal recording material formed using a heat recording material or a thermal head transfer method using the same has been reported.
(2) The printing speed is slow at lO*m~11, (3
) It has drawbacks such as low dora F density and high resolution power cannot be obtained. In Japanese Patent Application Laid-open No. 55-86793, there is a true multilayer 1? of resistance value. ! A current-carrying recording material made of the same or a current-carrying transfer method using the same has been reported. However, this method also has (1) ic! The layer structure of the recording material is complicated.(2) It is difficult to control each layer, which makes the production of the recording medium (recording material) difficult.(3)? (4) The material margin of the ink layer is narrow and manufacturing reliability is poor.

This %kJA was made with the aim of eliminating the drawbacks of the above-mentioned conventional technology, and is several lOμm to lOμs.
Or that, or more than 8 consecutive years of printing speed and 8
The purpose is to provide a high-resolution, image-based ink copy of the book/fi.

A further object of the present study is to provide an ink medium in which the dove 111& is simple and can reduce costs, the ink layer can be easily regenerated, and the printing stability and gIM properties are also improved.

That is, the ink tIJk of the present invention includes a porous support sheet and a hot bath meltable ink that is filled into the pores of the sheet and temporarily forms the surface of the sheet. The electric resistance of the rod is 1jlI% of the thermal ink q)
The value is more than 10 times the Qi resistance.

However, it is assumed that at least the inside of the hole of the sheet is formed with a critical surface tension of 350 dyn· or less by 1 negative.

Figure 1 is a partial flat III diagram of the ink cartridge of the present invention w4
FIG. 2 shows a cross-sectional view of the same, in which the pores of the porous support sheet 11 are filled with heat-bathable ink 12, and an ink layer is formed on the top of the ink 12Fi sheet 11.

This ink medium 13.:'.

Conduct wIi Soki Pass in response to Fi Kamikikango, 3-a
The *salt is shown in the figure and MS-b figure. In the map A-a,
g to the stylus electrode 14! When No. 1 voltage is applied, the % difference is the interfill 11$12a directly below the stylus electrode → ink layer 12b directly below the stylus electrode → ink layer 12m)
→ Segment of ink layer 12b) 1 [@180fi lower part →
The segment electrode is constitutes a circuit and flows. Style 2
Since the area surrounding the stylus electrode 14 is extremely smaller than the area of the segment electric field fjAtS, the energizing path directly below the stylus electrode from the ink filling 11s12a to the ink dove 12b generates a large amount of heat due to the strong electric field. The ink in the portion is thermally melted and transferred to transfer #16, and ms recording is performed in accordance with the -gI times signal (Fig. 3-b).

Image I like this! In order to make clear recordings corresponding to the number, it is necessary to selectively increase the electric field intensity in the ink area directly below the recording electrode, but in this study, the electrical anisotropy was reduced to 1.
This was made possible by using an ink medium that That is, in the ink medium according to the present invention, the length direction of the ink medium is partitioned by walls with higher electrical resistance.
9 (The pores cast in the porous support sheet are independent pores.) Current flows selectively in the vertical direction.

Furthermore, in the uninvented invention, the inward direction of the pores of the porous support is less than or equal to the critical surface tension of 350 dye/wound, preferably eye i 0
Because it is made of substances that are less than dye/dye.

After melting in a hot bath, the ink is quickly and efficiently transferred to transfer paper.

Figure 4-a or Figure 4-a? Figure 1-b shows another example of the structure of the ink medium of the present invention. Figures 4-a and 4-'
Figure b shows a mesh-like porous support sheet)1. FIG. 7 is a wfr front view and a top view, respectively, showing the case of 7 using 'la. Figure 5-a and Figure s-b also show the case where a punched 1 m porous supporting structure is used. Figures 6-a and 6-b show a porous support sheet 11e formed into a sheet by joining circular or polygonal tubular objects in the wIAI direction. In this figure, a tubular tfIaf with a hexagonal cross section is shown: the tubular tfIaf is fused with each other in the lateral direction to form a honeycomb shape, but the shape of the tubular material is not particularly limited. A case is shown in which the porous pattern carrier sheet lid of No. 7-1 Kyo and J17-b Zumine Grate Makoto is used.

The methods for forming the pores of the porous support sheet (cutting, punching, joining of the tubular body, and the shape of the pores have been exemplified above, but the method is not limited to this, and any method can be used as long as it has independent pores. In addition, from the point of view of division w4 ability,
It is preferable that the pore diameter is small, the pore density is cloudy, and the geometric hexagonal ridge is small.

In order to ensure electrical anisotropy t-, the ink support member (
In addition to the shape of the porous support, the electrical properties are also the same!
2 required. Fig. 8 structurally shows the flow of current under the stylus electrode 14a when a demonic signal is applied. It is necessary to avoid short-circuiting.

For this purpose, it is necessary that the volume electrical resistance of the porous support 110 is 410 times or more greater than the barometric electrical resistance of the hot-melt ink 129, preferably 1 (10 times or more). By providing a conductive V current, the current flows like the arrow of the condensed wire and electrical anisotropy is ensured, but the porous support sheet must have a barometric electrical resistance value of I O'Ω or more. is preferable, more preferably 141”
Ω1 or more. It should be noted that it is not necessarily necessary that the entire porous support sheet be made of a material with the above-mentioned electrical properties; instead, the porous support sheet may be formed from a material having the above-mentioned electrical properties, and the inner surface of the pores of this sheet may be The entire surface may be damaged with a material having the above-mentioned magical properties. That is, the 8th
selectively in li! So that the current flows towards the edge.

Therefore, it is sufficient to set the resistance part to M.

In addition, in order to ensure rapid and efficient transfer of hot bath melting hole ink, the inner surface of the pores thl of the porous support sheet must be formed of a material with a critical narrow surface tension of a 50 dyn@/a+ or less. is required, preferably LIil 50
dyne/wound. In order to realize this requirement, the entire porous sheet may be formed of a material having this property, and also the i! 12 The necessary partial subsidence may be submerged as follows.

Specific examples of porous sheets include the following. Mesh type items include nylon mesh, polyester mesh, polyurethane mesh,
Insulating fiber mesh sheets such as cellulose mesh,
Alternatively, a mesh sheet made of a wire made of the following conductive material is covered with the following insulating material.

(1) Special electric materials: common, silver, stainless steel, phosphorus? Copper, copper, nickel, iron, carmen, brass, aluminum, zinc, lead, etc. (2) Insulating materials Polyester, polycarbonate, fluorine side panels, cellulose, polyurethane, polyamide, polyimide, urea resin, etc. Insulating plastics Aluminum oxide , aluminum nitride, silicon oxide, titanium nitride, zirconium nitride, manganese nitride, boron nitride, etc. Punching of a mixture of nitrides of 1 citrus or more than Fi2 oval*m
The tubular aggregated porous sheet is formed from an insulating material as described above or by coating a conductive material as described above with an Ie material.

Hot bath 4! Il-based ink forms a current path at the time of image signal,
It is melted in a bath using Joule heat and recorded in a single transfer process. Therefore, first of all, it is necessary that the thermal #I fusible ink has a volume resistivity as described above with respect to the porous support sheet, preferably 100 cm or less, and more preferably F
i is the volume resistance value of a 10 to 10 Ω wound. In addition, it is necessary that it is meltable in a hot bath, and preferably has a melting point of 200°C or less, more preferably 60 to 150°C.

In addition, it must have an image forming ability, and in general, it must contain a pigment that has a certain color streak, that is, a coloring material! iced.

Embodiments of thermal M1111 ink having such functions include (1) heat bath melting fill K low resistance fIi4 or further dispersing shield color auxiliary pigment; (2) M bath melting There are two types: (3) one in which a conductive material and a skin coloring material are dispersed in a thermosetting resin, and (3) one in which conductivity or skin coloring ability is imparted to a thermosetting resin. However, the type shown in (1) is the most practical.

As the low-resistance pigment, case black, iron oxide, graphite, metal powder, etc. are used, and as the color pigment, general pigments or dyes are used.

The heat-melting side line preferably has a temperature of 200°C or lower, more preferably 40 to 12°C (1°C), such as canaluba wax, auricule wax, paraffin wax, beeswax, ceresin wax, and Natural waxes such as wax, synthetic waxes such as low molecular weight polyethylene, oxidized waxes, and ester waxes, valves that are solid at n temperature such as sorbitan stearate L-1, propylene glycol monosdearate, glycerin stearate, and polyoxyethylene stearate. oil opening agent,
Examples include lauric acid, tertiary fatty acids that are solid at room temperature such as palmitic acid, myristic acid, stearic acid, and behenic acid, and higher grade VJ group alcohols such as cetyl alcohol and lauryl alcohol, as well as mineral oil, vegetable oil, WJ oil, etc. Oily substances, lanolin, castor oil, etc. may be used in combination.

Figure #49 is a schematic diagram of an apparatus that performs continuous recording on transfer paper using the ink medium of the present invention.

The ink medium 16 transfers the image 19 onto the transfer paper 18 in response to a signal from the recording electrode section 17. This transfer 1am has already been explained along with FIGS. 3-1 and 3-b. Next, the ink medium 16 is heated by a heater 20 and guided to an ink tank 21 containing molten ink (22 is a heating heater).The ink medium 16 is passed completely between the back surface 23 and the blade 24 to taste the excess ink. Then, the thickness of the ink layer 12b, 1.
It can be adjusted by adjusting the gap between and -.

FIG. 10 is a diagram showing in more detail how the ink medium is regenerated when an ink disk is used. The recorded ink medium 16 has an ink-deficient portion 16m at -ttts. Ink 26 is attached to the ink medium by the ink stick 25, melted by the heater 27, and then passed between the back plate 23 and the blade 24 to remove excess ink and form the ink medium 1.
6 is played.

As explained above, according to the ink medium of the present invention, non-in/duct printing on plain paper at a high density is possible.
It is Noh. In addition, it is easy to wipe the ink medium and it is easy to reproduce it.Furthermore, a recording electrode such as a multi-stylus electrode is sufficient for the printing unit, and m-image recording is performed very simply, so stability and m-axis properties are also improved. stomach.

Souse? A stainless steel mesh sheet with a curved diameter of 1J 1 35/1111 was sprayed with silicone resin to an average thickness of 7 μm to form a porous support sheet. This silicone resin had a critical surface tension of 32 dyne/z. This '3L Karian sheet is shown in Fig. 9, and is attached to the device and heated to 1
It was heated to 00°C and immersed in an ink tank maintained at 98°C to attach heat l@curzen dispersion ink with a melting point of 87°C.
Also, the ink medium of the present invention. Next, use 8 electrodes/1m of single-sided negative electrodes to apply -17 UV to the stylus and +1 to the segment.
After applying 5OV and repeating the printing of the peta [I amount and regenerating the ink medium, the peta ll1 of 1.41 was applied.
Il image t-chronic.

Example 2 Porous support sheet of base metal phosphor bronze of polytetrafluoroethylene 7'41ielL with steep lattice shown in Figures 7-a and 7-b (through holes 1υ5 x 10!1μ, wall thickness 80μm) Thermal transfer was carried out in the same manner as in Example 1, except that it was used in Example 1. As a result, an m image of S degree of 1.370 peta and a l1kl image was obtained with a flat hole. The rise force of this support sheet is 26
dyne/cm.

Comparative Example 1 - PVD # on the same stainless steel mesh sill as in Example 1
5 u o XOAIN thin m te 4ftW
k
When printing was performed under the same conditions as 1, the image density was 0.6.
A 0 solid w4 image was obtained. The critical surface tension of ^lN is 66
It was 0 dyne/m.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a plan view and a cross section showing an example of the structure of the ink medium of the present invention. Figure 3-Electrogram and Figure 3-B are diagrams showing the transfer mechanism using the ink paste of the present invention. Figures 4-7 to 7-b are a wT quotient diagram and a plan view, respectively, showing structural examples of the ink medium of the present invention. FIG. 8 is a cross-sectional view of a hole explaining the current path in the ink medium of the present invention. The ninth figure is a schematic diagram of an apparatus for recording an image using the ink medium of the present invention. The first diagram is a schematic diagram showing the ink and paper reproducing apparatus of the present invention. ...1 ,,':l-:,:"l,t 11... Porous support sheet) 12... Heat-melting ink l 4... Stylus electrode 15... Segment electrode 16... - Ink medium 17... Recording electrode section 18 Transfer paper 21... Ink tank 23... Rear stand 24... Blade 25... Ink stick line 7-b diagram

Claims (1)

[Claims] 1. It has a porous support sheet and a hot bath meltable ink filled in the pores of the sheet and covering the back side of the sheet, and the volume electrical resistance of the sheet is 1S bath meltable. The sheet has a critical blush tension of 350 dyn on at least six inner surfaces of the pores, and has a value that is 10 times or more the volume electrical resistivity of the color ink.
・An ink medium characterized by being formed of a substance that is less than a scratch.