JPS60180892A - Heat-sensitive stencil paper - Google Patents

Abstract

PURPOSE:To provide the titled stencil paper capable of being easily fitted to a thermal printer, free of wrinkling and suitable for making a plate therefrom without troubles, wherein a specified heat-sensitive stencil sheet is integrally adhered to a base paper by an adhesive so that it can be released. CONSTITUTION:A thermoplastic synthetic resin film 4 to be perforated through melting in the form of characters or the like by the heat from a thermal head and a sheet form porous base 5 capable of absorbing the melted resin component of the film 4 are laminated to each other to produce the heat-sensitive stencil sheet 2. The sheet 2 is laid on the base paper 3 with the base 5 side in contact with the base paper 3, and the base paper 3 and the base 5 are adhered to each other over the entire surface thereof by an adhesive 7 having such an adhesive strength that the base paper 3 and the base 5 can be released from each other, thereby integrating the sheet 2 with the base paper 3 to obtain the objective stencil paper. The adhesive 7 is preferably constituted of a wax or a fat which is solid at normal temperature and is melted by the heat from the thermal head.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a method of creating a printing stencil by melting and perforating characters, etc. in a dot matrix on a thermoplastic synthetic resin film by the heat of the thermal head attached to a thermal printer. The invention relates to heat-sensitive stencil paper.

Conventional technology Usually, a heat-sensitive stencil sheet made by laminating a thermoplastic synthetic resin film and a porous support is extremely thin and highly flexible, so it cannot be attached to a thermal printer. It is extremely difficult to make a plate.

Therefore, it is conceivable to stack a support mount on the heat-sensitive stencil sheet and glue them together at one end to improve operability due to the rigidity of the support mount. Since most of the contact with the backing paper is open except for the adhesive areas, the heat-sensitive stencil sheet is likely to slip on the support backing paper and cause wrinkles when the line feed operation of the thermal printer, especially when the line feed operation is in the opposite direction. There is a problem in that this causes trouble in the plate-making work.

Purpose This invention has been made in view of the above-mentioned problems, and its object is to be able to easily attach it to a thermal printer, and to reliably prevent wrinkles from forming on a heat-sensitive stencil sheet when it is attached. An object of the present invention is to provide a new heat-sensitive stencil paper that allows plate-making operations to be performed without any trouble.

Structure In order to achieve the above-mentioned object, the present invention includes a thermoplastic synthetic resin film for melting and perforating characters etc. using the heat of the thermahead, and a sheet-like porous support capable of absorbing the molten resin of the film. The heat-sensitive stencil sheet formed by pasting the stencil with the porous support is superimposed on the support mount so that the surfaces of the porous support face each other, and an adhesive force is applied that allows the support mount and the porous support to be peeled off. The heat-sensitive stencil sheet and the supporting mount were integrally formed by polymerizing and adhering almost the entire surface using an adhesive.

EXAMPLE Hereinafter, an example embodying the present invention will be described based on the drawings.

1 and 2, reference numeral 1 indicates the entire heat-sensitive stencil paper of this embodiment, and the base paper 1 is composed of a transparent heat-sensitive stencil sheet 2 and a support mount 3 of approximately the same size as the heat-sensitive stencil sheet 2. ing. The heat-sensitive stencil sheet 2 consists of a thermoplastic synthetic resin film 4 and a sheet-like porous support 5, both of which are bonded to each other via a first adhesive 6.

The heat-sensitive stencil sheet 2 is superimposed on the support mount 3 so that the porous support 5 faces each other, and both can be easily peeled off.
Almost the entire area except one end is polymerized and bonded using an M2 adhesive 7 having an adhesive force of 111. As a result, the heat-sensitive stencil sheet 2 and the support mount 3 are integrated.

On the surface of one end of the thermoplastic synthetic resin film 4 of the heat-sensitive stencil sheet 2, there is a lug 8 with an adhesive 11 which has enough rigidity to attach the sheet 2 to a rotary printing press during printing.
The lug 8 has a plurality of holes 9 transparent therein, which are engaged with the cylinders of a rotary printing press. Further, a portion of the support mount 3 to which the second adhesive 7 is not attached serves as a non-adhesive portion 10.

Now, when creating a printing stencil using the heat-sensitive stencil paper 1 configured as described above, first, both the heat-sensitive stencil sheet 2 and the support mount 3 are attached to the platen of a thermal printer, and then The plastic synthetic resin film 4 is placed opposite the thermal head.

Then, by operating a print key on the keyboard of the same printer, characters or the like are melted and perforated in a dot matrix on the thermoplastic synthetic resin film 4 by the heat of the thermal head. When covered, the molten resin of the film 4 is absorbed into the porous support 5, which prevents clogging of the perforations and allows characters, etc. formed on the thermoplastic synthetic resin film 4 to be removed. The perforation image becomes clear and the melted resin is prevented from adhering to the thermal head.

In addition, during this plate making, the support mount 3 is placed on the heat-sensitive stencil sheet 2.
Since it is polymerized, the rigidity of the support mount 3 allows it to be easily attached to a thermal printer. Moreover, since the heat-sensitive stencil sheet 2 and the support mount 3 are polymerized and bonded almost entirely through the second adhesive 7, when the printing lines are fed as the platen 2 rotates, especially in the opposite direction. At this time, there is no risk that the heat-sensitive stencil sheet 2 will slip on the support mount 3, and thereby the generation of wrinkles in the sheet 2 is reliably prevented. Therefore, causes such as damage to the heat-sensitive stencil sheet 2 and paper jams during plate-making are eliminated, and plate-making work can be performed without any trouble.

On the other hand, when printing is performed using the printing stencil made in this way, the ear portion 8 is engaged with the cylinder of a rotary printing press through the hole 9, and the non-adhesive portion 10 is pinched with a finger. Then, as the heat-sensitive stencil sheet 2 is wound around the cylinder, the support mount 3 is peeled off. In this case, since the heat-sensitive stencil sheet 2 and the support mount 3 are almost entirely polymerized and bonded by the second adhesive 7, which allows both to be easily peeled off,
Damage to the heat-sensitive stencil sheet 2 due to the peeling operation of the support mount 3 <'E <4 easily against the cylinder! [can do. Also, since the peeling operation of the support mount 3 stretches and covers the heat-sensitive stencil sheet 1-2, the same sheet 2
There is no risk of wrinkles on the cylinder.

When the rotary printing press is operated in this state, ink is supplied from the thermoplastic synthetic resin film 4 side, and the ink that has passed through the perforated image area is used to bond the printing muntins to the porous support 5. The characters, etc. are printed clearly in rlJ.

Next, materials used in each part of the heat-sensitive stencil paper constructed as described above will be explained.

As the thermoplastic synthetic resin film 4, for example,
Polyester film, polypropylene film, polyvinyl chloride film, etc. can be used, and the Fr;t thickness is preferably 10 μm or less, preferably 1 to 6 μm. The thickness is 11U [
If the upper limit of Il+ is exceeded, the perforation performance by the thermal head will be poor and accurate stencils cannot be obtained. Furthermore, if the thickness is less than the above range, the strength will decrease and problems such as breakage of the film 4 will occur. Furthermore, the thermoplastic synthetic resin film is usually a biaxially stretched film, preferably with a stretching ratio of 150 to 250% in both the longitudinal and transverse directions.

The porous support 5 may be a synthetic I&TI cloth such as polyester Ilff, vinylon fiber, nylon II, etc., or a single natural 4M fiber such as Manila hemp, paper mulberry, mimmata, or pulp, each having a fineness of 3γ neel or less. or a mixture, which can absorb the molten resin content of the geothermoplastic synthetic resin film 4 in (a), the basis weight of which is 6 to 14 (1/m), preferably 8 to 14 g.
/m” and its thickness is preferably 20 to 60μ; L or 30 to
50μ is good.

The first adhesive 6 for bonding the thermoplastic synthetic resin film 4 and the porous support 5 may be, for example, a synthetic resin adhesive such as vinyl chloride, polyacrylate, polyester, or polyamide, or SBR. , NBR, or other synthetic rubber adhesives can be used.

As the support mount 3, for example, high-quality paper, bleached kraft paper, pure white paper, etc. can be used, and the tsubo m of these sheets is 40
~120(1/m"preferably 50-100g/i"
The thickness is preferably 30 to 120 microns, preferably 40 to 100 microns.

On the other hand, the second adhesive 7, which releasably adheres the heat-sensitive stencil sheet 2 and the support mount 3, has a melting point of 120, which is solid at room temperature and becomes fluid when melted by the heat of the thermal head. ℃ or less, preferably 90℃ or less and 50℃
The above oils and fats can be used. For example, Kartuba wax, beeswax, castor wax, resin wax, stearamide, oleamide,
Examples include ethylene bis-stearamide, stearic acid, and valmitic acid. The amount of application depends on the mouthpiece used. Or 1, 0 to 3 depending on the oil or fat.
It is preferably around Oo/a+''.

By the way, when wax or oil is used as the second adhesive 7, part of the molten adhesive or oil penetrates into the porous support 5 and solidifies during the manufacturing process. Since the wax or oil is melted by the heat of the thermal head during plate making and becomes fluid, the perforated portions of the thermoplastic synthetic resin film 4 can be absorbed without impairing the ability of the porous support 5 to absorb the molten resin. It is possible to prevent clogging and maintain a clear perforation image. In addition, when the support mount 3 is peeled off during printing, a portion of the wax or oil remains in a solidified state inside the porous support 5, so that the porous support for the ink supplied from the film 4 side Bleeding on the body 5 is prevented, and characters etc. printed on the printing paper can be made clear. In addition, other waxes or oils can be used on the support mount 3.
It is peeled off along with it.

Furthermore, as the second adhesive 7 for polymerizing and adhering the heat-sensitive stencil sheet 2 and the support mount 3, a synthetic resin adhesive having an adhesive force that allows the two to be easily peeled apart from the above-mentioned wax or oil can be used. can be used. The types include, for example, water-soluble resin adhesives such as casein, viscose, polyvinyl alcohol, methyl cellulose, and carboxyldroxyl methyl cellulose;
Alternatively, a solvent-based resin adhesive may be used, which is made of a mold or dispersion resin such as polyethylene, polyester, polyacrylate, polyurethane, or vinyl acetate.

It should be noted that, depending on the nature or amount of the synthetic resin adhesive, when the support mount 3 is peeled off and removed from the heat-sensitive stencil sheet 2, almost all of the synthetic resin adhesive is attached to the porous support 5 along with the support mount 3. If printing is performed using the heat-sensitive stencil sheet h2 in this state, a problem arises in that the ink bleeds onto the porous support 5. In such a case, if the porous support 5 is impregnated with wax or oil that is solid at room temperature and melts when the thermal head is heated, the ink will not bleed on the porous support 5. can be prevented.

In addition, some of the synthetic resin adhesives described above may remain in the porous support 5 even after the support mount 3 is peeled off, so when using this type of synthetic resin adhesive, the application By adjusting the amount appropriately, the remaining adhesive can prevent ink from bleeding on the porous support 5 by 11 degrees.

Next, an example of a prototype thermosensitive 11 stencil paper produced by selecting and using specific materials from the above-mentioned materials will be described.

(Prototype Example 1) A first adhesive was applied to one side of a 4μ thick polyester film (a biaxially stretched film with a stretching ratio of approximately 200% in both the longitudinal and transverse directions) as the thermoplastic synthetic resin film 4. 6 is styrene butadiene rubber (SB
R') (Product name: Trublen T-475 Asahi Kasei Co., Ltd.)
15 parts by weight, 30 parts by weight, 30 parts by weight, and 5 parts by weight of cyclohexane.
Adhesive solution consisting of 5 serious parts with a dry coating amount of 1.5
g/m2, and on top of that, a porous support 5 with a thickness of 35 μm obtained by mixing 80 parts by weight of polyester fiber and 20 parts by weight of Manila hemp with a single hanging of 9.8++/♂ was overlaid. They were combined and dried by heating at 80° C. to prepare a heat-sensitive stencil sheet 2.

Next, the tsubo Ml 1 , 1 0Q as the support mount 3
An 8% solids emulsion of carnauba wax (melting point 90°C) as the second adhesive 7 was applied onto a bag making paper of /m' so that the dry coating amount was 1.5 (1/It"), The heat-sensitive stencil sheets 1 and 2 were superimposed thereon, and they were dried by heating at 80° C. to polymerize and adhere to each other, thereby producing a heat-sensitive stencil paper 1.

The heat-sensitive stencil paper 1 thus obtained is mounted on a thermal printer (trade name: Thermal Transfer Printer PC-8825, manufactured by NEC Corporation), and printing is performed by pressing the first thermal head against the polyester film side to print the stencil-perforated image. was formed.

Subsequently, the mount 3 is peeled off and removed from the heat-sensitive stencil paper 1, and the heat-sensitive stencil sheet 2 is printed on a rotary printing machine 1 (Model 1535W, manufactured by Gester Toner) from the polyester film side. When the printer was attached to the paper supplied with Paki and printed, clear characters were printed on the printing paper.

Further, 4. There is no inconvenience that the heat-sensitive stencil sheet 2 is stretched or damaged when the mount 3 is peeled off and removed from the heat-sensitive stencil sheet 2. Further, since the carnauba wax remained in the porous support 5 of the heat-sensitive stencil sheet 2 after the mount 3 was peeled off, the remaining carnauba wax was melted by the heat of the thermal head during plate making and the porous support 5 was melted by the heat of the thermal head. The absorption function of the molten resin in the film 4 was not impaired, the perforated image on the film 4 was kept clear, and the carnauba wax solidified during printing to prevent the ink from bleeding on the porous support 5. There was no ink bleeding on the characters printed on the printing paper. Note that wax such as carnauba wax or the various oils and fats described above may be used as the porous support 5.
The reason why these adhesives remain in the adhesive is that they are brittle and break easily compared to synthetic resin adhesives.
This is thought to be because the structure of the porous support 5 adheres to the structure 11 and is easily peeled off from the support mount 3. A first adhesive (6) and a vinyl acetate-ethylene copolymer resin (2) are applied to one side of a film (with a stretching ratio of approximately 200% in both the longitudinal and transverse directions).
Apply an adhesive solution consisting of 0 parts by weight and 80 parts of pebbles so that the dry coating Φ is 1.5a/n+'',
On top of that is Manila hemp.
A porous support 5 having a thickness of 40 μm was stacked on top of the other porous supports 5, and they were heated and dried at 90° C. to produce a heat-sensitive 1/1 stencil sheet 2.

Next, on a bag-making mount with a basis weight of 120 o/m'' as a support mount 3, methylcellulose (trade name: Me-Rose 90SH low viscosity 1q product, manufactured by Shin-Etsu Chemical Co., Ltd.) 10 is applied as a second adhesive 7. A synthetic resin adhesive consisting of a heavy ω part, 30 parts by weight of methanol, and 60 parts by weight of water is applied so that the dry application m is 1.OQ/m'', and the heat-sensitive stencil sheet]・2 were pressed together and dried by heating at 90° C. to polymerize and adhere to each other to produce heat-sensitive stencil paper 1.

Subsequently, this heat-sensitive stencil paper 1 was installed in the same thermal printer used in Prototype Example 1 to form a perforated image on the polycarbonate film.

(When the mount 3 was peeled off and removed from the heat-sensitive stencil paper 1 thus prepared, the heat-sensitive stencil sheets 1 and 2 were mounted on the same rotary printing machine as in Prototype Example 1, and printing was carried out. Clear characters were printed on the printing paper.

In addition, in this prototype example 2, when the mount 3 was peeled off and removed, a part of the synthetic resin adhesive remained in the porous support 5, and the ink on the porous support 5 was eroded. Since the bleeding was suppressed, there was no inconvenience that the characters on the printing paper would smudge.Furthermore, the backing paper 3 was removed.
] There is no inconvenience that the boria J-bonate film and porous support 5 of the heat-sensitive stencil sheet 2 are stretched or damaged during the process.

Effects of the Invention As detailed above, the present invention provides a thermoplastic synthetic resin film for melting and perforating characters etc. using the heat of a thermal head, and a sheet-like porous support capable of absorbing the molten resin of the film. A heat-sensitive stencil sheet formed by laminating the above-mentioned porous support surface to the support mount so that it faces the support mount, and has an adhesive force that allows the support mount and the porous support to be peeled off. Since the heat-sensitive stencil sheet, the support, and the mount are integrated by polymerizing almost the entire surface with an adhesive, it can be easily attached to a thermal printer, and when it is attached, it can be attached to the heat-sensitive stencil sheet. J3 Reliably prevents the appearance of wrinkles 1. This has the excellent effect of allowing plate-making work to be performed without any trouble.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a heat-sensitive stencil paper showing an embodiment of the present invention, and FIG. 2 is an enlarged vertical view of the main part thereof. Heat-sensitive stencil sheet 2, support mount 3, thermoplastic synthetic resin film 4, porous support 5, second adhesive 7゜Patent applicant Asia Base Paper Co., Ltd. Representative Patent attorney On 1) Hironobu

Claims (1)

[Claims] 1. A thermoplastic synthetic resin film (4) for melting and perforating characters etc. with the heat of a thermal head, and the same film (4).
A heat-sensitive stencil sheet (2) formed by laminating a sheet-like porous support (5) capable of absorbing the molten resin of 4),
The porous support (5) is superimposed on the support mount (3) so that the surface thereof faces the support mount (3), and then the support mount (3) and the porous support (5) are peeled off. The heat-sensitive stencil sheet (2) and the supporting mount (3) are polymerized and bonded almost entirely using a Jgi agent (7) that increases the possible adhesive strength.
A heat-sensitive stencil paper that is characterized by being integrated with. 2. The heat-sensitive stencil paper according to claim 1, wherein the adhesive (7) is made of wax or oil that is solid at room temperature and melts by the heat of the thermal head.