JPS60180891A - Heat-sensitive stencil paper - Google Patents

Abstract

PURPOSE:To provide the titled stencil paper capable of giving a clear print free of blurring of an ink on a printing paper, wherein a thermoplastic resin film and a sheet form porous base are laminated on each other through an adhesive so that they can be easily released from each other, the film being released from the base at the time of printing. CONSTITUTION:The thermoplastic synthetic resin film 2 such as a polyester film having a thickness of 1-6mum and the sheet form porous base 3 formed from polyester fibers of 3 denieer or finer or the like, preferably, having a thickness of 30-50mum, are laminated and adhered to each other through an adhesive 4, e.g., a vinyl acetate resin or a polyacrylate, to obtain the objective stencil paper 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field This invention relates to heat-sensitive stencil paper. More specifically, a thermoplastic synthetic resin film and a porous support are pasted together with an adhesive, this is attached to a thermal printer, and the heat of the thermal head melts and perforates letters, etc. in a dot matrix on the film. The porous support absorbs the molten resin and prevents clogging of the perforated image, thereby making it possible to produce a printing stencil.
The present invention also relates to a heat-sensitive stencil paper in which ink is supplied from the thermoplastic synthetic resin film side during printing, and printing can be performed on the printing paper by passing the ink through the perforated image and the porous support.

Object of the Invention The object of the invention is to provide a novel heat-sensitive material that can peel off and remove a porous support from a thermoplastic synthetic resin film during printing, and perform clear printing without ink bleeding on printing paper. The purpose is to provide stencil paper. In addition to the first invention, a second object of the invention is to provide a heat-sensitive stencil paper from which a porous support can be peeled off very easily.

Structure of the Invention In order to achieve the above object, the first invention of this application adopts a structure in which a thermoplastic synthetic resin film and a porous support are polymerized and bonded via an easily peelable adhesive. There is. In addition, in the second invention of this application, in addition to the structure of the previous threshold invention, a mount is provided, and the mount and the porous support are bonded by polymerization via an adhesive having stronger adhesive force than the adhesive. The structure is to do so.

Example 1 Hereinafter, Example 1 embodying the first invention of this application will be described as the first example.
This will be explained based on FIGS.

As shown in FIGS. 1 and 2, the heat-sensitive stencil paper 1 of this embodiment is composed of a thermoplastic synthetic resin film 2 and a sheet-like porous support 3. 2 and the porous support 3 are polymerized and bonded to each other via an adhesive 4 that can be easily peeled off.

An ear portion 5 made of a rigid band-like member such as cardboard is attached to the surface of one end of the thermoplastic synthetic resin film 2, and is attached to the ear portion 5 so as to be attached to a rotary printing machine (not shown). A plurality of positioning holes 6 are transparently provided along the longitudinal direction. Further, in the vicinity of the ear portion 5, one end of the porous support 3 is provided with a non-contacting portion 7 by not interposing the adhesive 4 between the support 3 and the thermoplastic synthetic resin film 2. is formed over the entire width.

During plate making, the thermoplastic synthetic resin film 2 is attached to the thermal head of the thermal printer (none of which is shown).
The heat of the head melts and perforates ink permeation openings corresponding to the printed characters in the thermoplastic synthetic resin film 2 in the dot matrix, and the molten resin of the film 2 is the porous support 3
This prevents the opening from clogging. On the other hand, during printing, one end of the thermoplastic synthetic resin film 2 is locked to the cylinder of a rotary printing machine at the ear portion 5, and the non-adhesive portion 7 of the porous support 3 is pinched with fingers to form a thermoplastic synthetic resin film. By winding the resin film 2 around the cylinder, the porous support 3 can be easily peeled off and removed from the film 2 together with the adhesive 4.

Note that the non-adhesive portion of the porous support 3 is not limited to the above-mentioned structure, and for example, as shown in FIG. A triangular non-adhesive portion 9 may be provided at one corner of the porous support 3 to be peeled off and removed along the tear line 8.

In this way, the porous support 3 can be easily peeled off by pinching the non-adhesive portion 9 with your fingers when it is mounted on a rotary printing press.

As the thermoplastic synthetic resin film 2 in this embodiment 1, for example, polyester film, polycarbonate film, polypropylene film, polyvinyl chloride film, etc. can be used, and the thickness thereof is 10μ or less, preferably 1 to 6μ. The one is good. If the thickness exceeds the above range, the perforation by the thermal head will be poor and accurate stencils will not be obtained. Furthermore, if the thickness is less than the above range, the strength will decrease and problems such as breakage of the film 2 will occur. Furthermore, the thermoplastic synthetic resin film 2 is usually a biaxially stretched film, preferably with stretching ratios of 150 to 250% in both the longitudinal and transverse directions.

The porous support 3 each has a denier of 3 denier or less,
Synthetic fibers such as polyester 1liI, vinylon fiber, nylon fiber, Manila hemp, paper mulberry, mitsumata, etc.
It is possible to use natural fibers such as pulp alone or in combination, and their tsubo m is 6 to 140/m''
L, preferably 8-14 (1/m, the thickness is 20-14
60μ, preferably 30 to 50μ.

The adhesive 4 in this embodiment 1 for bonding the thermoplastic synthetic resin film 2 and the porous support 3 may be, for example, vinyl acetate resin, polyacrylate ester, polymethacrylate ester resin, polymethacrylate resin, etc. urethane resin,
Thermoplastic synthetic resin film 2, such as ethyl hirch
Any material can be used as long as it has enough adhesive strength to easily separate the porous support 3 from the surface of the material.

Next, an experimental example of the heat-sensitive stencil paper 1 in Example 1 will be explained.

(Experimental Example 1) A 10% adhesive emulsion of acrylic acid ester emulsion (product name Polytron A-45 manufactured by Asahi Kasei Corporation) was applied to one side of a 4μ thick polyester film at a dry coating amount of 2.0 (+/Ill). A porous support made of manila hemp with a thickness of 110.5 g/l and a thickness of 40 μm was superimposed on it, and these were heated at 90°C.
The mixture was heated and dried to prepare a heat-sensitive stencil paper.

Next, the heat-sensitive stencil paper was attached to a thermal printer (trade name: Thermal Transfer Printer PC-8825, manufactured by NEC Corporation), and the polyester film was pressed against the thermal head to perform printing and form a stencil perforation image.

Subsequently, the porous support is peeled off and removed from the heat-sensitive stencil paper thus prepared, and the polyester film is rotary printed 1! (Manufactured by Gestelatner 1535W
When the printer was attached to a cylinder of a type (type) and printed, clear characters were printed on the printing paper. Furthermore, when the porous support was peeled off, there was no inconvenience that the polyester film would be damaged due to the peeling action.

Embodiment 2 Next, Embodiment 2 embodying the second invention of this application will be described based on FIGS. 4 to 6.

As shown in FIGS. 4 and 5, the heat-sensitive stencil paper 11 in this embodiment has a thermoplastic synthetic resin film 12.
The thermoplastic synthetic resin film 12 and the porous support 13 can be easily peeled off. The porous support 13 and the mount 14 are polymerized and bonded via a first adhesive 15 that can be bonded to each other, and the porous support 13 and the mount 14 are bonded by polymerization via a second adhesive 16 that has stronger adhesive force than the first adhesive 15. has been done.

On the surface of one end of the thermoplastic synthetic resin film 12, a lug 17 having the same structure as in the first embodiment is attached. In this embodiment, the mount 14 has the same vertical length as the thermoplastic synthetic resin film 12, and the porous support 13 is formed shorter than the −L length of the thermoplastic synthetic resin film 12 and the mount 14. . As a result, a non-adhesive part 18 for a predetermined use is provided over the entire width at one end of the mount 14 on the back of the ear part 17. And, the heat-sensitive stencil paper 1 in this Example 2
When attaching the first thermoplastic synthetic resin film 12 to the cylinder of a rotary printing press, as the film 12 is wound around the cylinder, the non-adhesive portion 18 is pinched and the mount 14 is peeled off. Since the adhesive force of the second adhesive 16 is stronger than that of the first adhesive 15, the first adhesive 15 and the porous support 13 are easily removed from the thermoplastic synthetic resin film 12 together with the mount 14. It is peeled off and removed.

Note that the non-adhesive portion for facilitating the peeling operation between the porous support 13 and the mount 14 is not limited to the structure described above, and for example, as shown in FIG. While forming two wood separation lines 19 and 20 consisting of perforations or the like extending in the width direction at predetermined intervals,
Cutout portion 2 of mount 14 located between both separation lines 19 and 20
A non-adhesive portion 21 may be provided at one end of 2. and,
When mounting on a rotary printing press, by picking up the non-adhesive portion 21 and pulling off the cut-out portion 22, the cut-out portion 22 and the porous support 13 in that area are peeled off at the same time. 14 and the porous support 13 can be easily peeled off and removed from the thermoplastic synthetic resin film 12.

In this example, the thermoplastic synthetic resin film 12, the porous support 13, and the first adhesive 15 can be made of any of the materials listed in Example 1, but the second adhesive Examples of 16 include vinyl chloride resin and SBR.

It is possible to use an adhesive that has a stronger adhesive force than the first adhesive 15 that bonds the film 12 and the porous support 13, such as synthetic rubber such as NBR, polyester resin, or polyamide resin. It is.

In addition, the mount 14 usually has a basis weight of 50 to 120 (
It is possible to use high-quality paper of It/m2 or paper for the crack 71.

Next, an experimental example of the heat-sensitive stencil paper in Example 2 will be explained.

(Experiment Example 2) Vinyl acetate 15
An adhesive solution consisting of a small amount and 85 parts of methanol was applied so that the dry coating amount was 2.0(]/III", and the base paper sheet prepared in Experimental Example 1 was placed on a part of A. Layering 1 Heat dry them at 80℃ and adhere them to each other.
A heat-sensitive stencil paper having the structure of Example 2 was produced.

Next, this heat-sensitive stencil paper was installed in the same thermal printer used in Experimental Example 1, and a stencil perforation image was formed on the polyester film as a thermoplastic synthetic resin film.

Then, the mount and porous support were peeled off and removed from the heat-sensitive stencil paper produced in this way, and the polyester film was mounted on the cylinder of the same rotary printing machine as in Experimental Example 1, and printing was performed. Clear letters were printed on it. Further, in this Experimental Example 2 as well as in Experimental Example 1, there was no inconvenience that the polyester film was damaged when the mount was peeled off together with the porous support.

Effects of the Invention As detailed above, according to the first invention of this application, the thermoplastic synthetic resin film and the sheet-like porous support are polymerized and bonded via an easily peelable adhesive. By removing the porous support during printing, there is an excellent effect in that clear printed matter without ink bleeding can be obtained. Furthermore, according to the second invention of this application,
By polymerizing and adhering the porous support and the mount through an adhesive that has a stronger adhesive force than the adhesive described above, the porous support can be removed from the thermoplastic synthetic resin film extremely easily when the mount is peeled off. Qin has the effect of being able to be peeled off and removed.

[Brief explanation of the drawing]

1 to 3 show a first embodiment embodying the first invention, in which FIG. 1 is a perspective view of a heat-sensitive stencil paper, FIG. 2 is an enlarged vertical sectional view of the main part, and FIG. The figure is a partial back view of a heat-sensitive stencil paper showing another example of the non-adhesive portion. 4 to 6 show a second embodiment embodying the second invention, in which FIG. 4 is a perspective view of a heat-sensitive stencil paper, FIG. 5 is an enlarged longitudinal sectional view of the main part thereof, and FIG. The figure is a partial back view of a heat-sensitive stencil paper showing another example of the non-adhesive portion. Heat-sensitive stencil paper 1.11 Thermoplastic synthetic resin film 2
, 12, porous support 3, 13, adhesive 4, mount 14,
First adhesive 15, second adhesive 16゜Patent applicant Asia Base Paper Co., Ltd. Agent Patent attorney On 1) Hironobu

Claims (1)

[Claims] 1. Consisting of a thermoplastic synthetic resin film (2) for melting and perforating characters etc. with the heat of a thermal head and a sheet-like porous support (3), both of which can be easily peeled off. A heat-sensitive stencil paper characterized in that it is polymerized and bonded via an adhesive (4). 2. Consisting of a thermoplastic synthetic resin film (12) for melting and perforating characters etc. with the heat of the thermal head, a sheet-like porous support (13), and a mount (14), the thermoplastic synthetic resin film ( 12) and porous support (13)
The porous support (13) and the mount (1) are bonded together via a first adhesive (15) that can be easily peeled off.
A heat-sensitive stencil paper characterized in that 4) and 4) are polymerized and bonded via a second adhesive (16) having a stronger adhesive force than the first adhesive (15).