JP4064725B2 - Release paper manufacturing method - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a method for manufacturing a release paper, and more particularly to a method for manufacturing a release paper in which a release agent is partially provided on at least one side of the paper.
[0002]
[Prior art]
Conventionally, a release paper in which a release agent layer is partially formed on at least one side of the paper is known. In general, in release paper, in order to prevent the release agent from penetrating into the paper, a release agent layer is formed on the penetration inhibitor layer. As the penetration inhibitor, a resin such as polyethylene is used, which is usually laminated or coated. In the conventional release paper in which a release agent layer is partially formed, the penetration inhibitor layer is formed on the entire surface of the paper due to technical problems.
[0003]
In recent years, there has been a need to display information on the release agent layer installation surface side of this type of release paper. For example, in a delivery slip formed by applying an adhesive on a partial release agent layer of a release paper and pasting a sticker, use the release paper as a stub for a receipt after sticking the sticker to a delivery item There is a case. In this case, since the information on the release agent layer of the release paper is difficult to display in terms of writability, printability, or printability, the non-release agent layer, i.e., the penetration inhibitor layer exposed portion, should be a stub. Usually, necessary items are printed in advance as a receipt, and the amount and date of receipt are entered with an appropriate writing tool at the time of receipt, and the receipt is stamped.
[0004]
[Problems to be solved by the invention]
However, the penetration preventing agent layer has a high solvent barrier property, so that the ink setting is slow, and it cannot be said that it is good in terms of printability and printability. For example, in printing with ink jet ink on the penetration inhibitor layer, the ink bleeds and is difficult to read. On the other hand, if the solvent barrier property is reduced to improve printability or printability, a large amount of release agent must be applied, which is not profitable in terms of cost, and the release force is more than necessary. It becomes difficult to put it into practical use.
[0005]
For this reason, in the past, it was very limited such as printing or printing with limited ink and method, limiting writing tools to be used for handwriting, and limiting vermilion even when stamping. There is an inconvenience that information can be displayed only under a certain condition. The present invention aims to eliminate such inconveniences, and provides a method for producing a release paper which is excellent in printability, printability, writing property, and sealability and which is partially formed with a release agent layer. It is.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the release paper manufacturing method according to claim 1 of the present invention is a release paper manufacturing method in which a release agent layer is partially provided on at least one surface side of the paper, and prevents penetration. By disposing the blowout port of the die coating head for coating the agent so as to face the paper transfer path in a continuous state, and by closing the portion other than the portion corresponding to the release agent installation planned portion of the paper at the blowout port Applying a permeation preventive agent to form a permeation preventive layer corresponding to the part of the paper where the release agent is to be installed while transporting the paper, and then applying a release agent on this permeation preventive agent layer to partially The release agent layer is further formed, and the paper is further cut into a predetermined size. The penetration inhibitor is an aqueous permeation selected from povals, acrylic emulsions, SBR latexes, and starches. Prevention The non-coating portion of the water-based permeation preventive agent is mainly made of an agent, and water is applied from the side opposite to the coated surface to equalize the water content of the paper, followed by drying, and the permeation preventive agent layer Is formed .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. Here, FIG. 1 is a schematic perspective view showing a state in which a permeation inhibitor layer is partially coated on continuous paper, FIG. 2 is a schematic cross-sectional view showing a manufactured release paper, and FIG. FIG. 4 is a comparative table showing the results of quality evaluation.
[0008]
Paper to be used for the present invention resides in a continuous state, it is usually preferred from the basis weight of 30 g / m ² wound in a rolled 200 g / m ² base paper, fine paper, Binurikoshi, coated paper, What is necessary is just to select from craft paper, one piece, paper, etc., and the kind of paper is not specifically limited. Examples of the release agent include silicon release agents, non-silicon release agents, and pressure bonding varnishes. Furthermore, the penetration inhibitor is not limited to an aqueous system, but a poval aqueous solution, an acrylic emulsion solution, an SBR latex aqueous solution, an aqueous starch solution, and the like are suitable. Other pigments such as resin and clay can be added to the permeation preventive as necessary. The coating amount of the penetration inhibitor is appropriately determined according to the required solvent barrier property, but a range of 0.5 g / m ² to 10 g / m ² is preferable.
[0009]
In the present invention, first, the blowout port of the die coating head for coating the permeation preventive agent is disposed opposite the continuous paper transfer path, and the portion corresponding to the release agent installation scheduled portion of the continuous paper at the blowout port By making the other than the closed state, the penetration inhibitor is applied to form the release agent-scheduled portion of the continuous paper to form the penetration inhibitor layer. In order to place the part other than the part corresponding to the release agent scheduled part of the continuous paper at the outlet, for example, a Duckel having a width corresponding to the width to be sealed is set in the die coating head (FIG. 1). (See Fig.) Or, the outlet may be sealed with a film having a width corresponding to the width to be blocked. The continuous paper can be transferred using a known transfer means such as a transfer roller.
[0010]
Further, although depending like the thickness of the continuous paper, in the process of drying after coating the water-based penetration inhibitor, phenomena that occur wrinkles in the difference in expansion and contraction of the coated portion and uncoated portion of the penetration inhibitor In order to prevent this, water is spotted with a sponge or the like from the back side of the non-coated portion, or water is sprayed to balance the moisture with the portion to which the aqueous penetration inhibitor is applied .
[0011]
Subsequently, the release agent is applied onto the penetration inhibitor layer to partially form the release agent layer, but as a release agent coating method, a gravure method, an offset method, an offset gravure method, etc. A conventionally known method capable of partial coating can be employed.
[0012]
Hereinafter, the manufacturing method in the case where a 100 mm width release agent layer is provided on one surface of a 200 mm width release paper so as to occupy half of the release paper will be described more specifically. As shown in FIG. 1, a die coating head 2 is disposed opposite to a transfer path of a continuous paper 1 made of high-quality paper having a width of 1200 mm and a basis weight of 110 g / m ² , and one end side of the blowout port 3. To 100 mm width Duckels 4 are set at intervals of 100 mm so as to correspond to the part where the release agent layer is not installed, and one 200 mm width Duckel 4a is set on the other end side. As a result, the blowout port 3 is opened at five locations of 100 mm width corresponding to the release agent layer installation portion.
[0013]
From the blowing port 3 which opens at 100mm intervals die coating head 2, pressure 5Kg / cm ² blown solid concentration of 10% PVA aqueous solution (aqueous solution of trade name Kuraray Poval PVA117), coating speed 150 meters / min, the head 2 And a continuous paper 1 with a spacing of 18 microns and a coating amount of 20 cc / m ² . Further, before the drying process to be applied after the coating, water spray is applied to a portion corresponding to the non-coated portion on the side opposite to the coated surface of the continuous paper 1 to thereby apply the poval aqueous solution coated portion and the non-coated portion. The water in the portion was equalized so that wrinkles were not generated in the drying process. After drying, calendaring was performed under conditions of a roll temperature of 80 ° C., 1 nip, and a nip pressure of 100 kg / cm ² .
[0014]
In this way, a gravure created by repeating 100 mm engraving and 100 mm planes with a gravure coating method is used for continuous paper 1 coated with 5 layers of a 100 mm width penetration inhibitor layer 5 at equal intervals of 100 mm. Then, adjusting the engraving portion on each of the permeation preventive agent layers 5, silicon (SRX-357, manufactured by Toray Dow Corning Silicon Co., Ltd.) as a release agent was applied at a coating amount of 0.5 g / Coated with m ² . Subsequently, the continuous paper 1 having a width of 1200 mm was cut into a 200 mm width composed of a release agent layer 6 having a width of 100 mm and a non-coated surface 6 having a width of 100 mm, thereby producing five continuous release papers 7 (see FIG. 2). .
[0015]
Subsequently, in order to evaluate the quality of the release paper 7, as shown in FIG. 3, the emulsion paste was applied on the release agent layer 6 of one release paper 7 to a solid content of 20 g / m ^2. After forming the pressure-sensitive adhesive layer 8, a high-quality paper 9 having a width of 100 mm and a basis weight of 40 g / m ² was stacked on the pressure-sensitive adhesive layer 8 and bonded together, and cut into a predetermined length to prepare a tack paper 10. Further, for comparison with the tack paper 10, the same size and the same penetration as the above-mentioned tack paper (Comparative Example 1) having the same size and the same thickness as the tack paper (Comparative Example 1) laminated with polyethylene at a thickness of 15 microns. A tack paper (Comparative Example 2) on which an inhibitor layer was formed was prepared.
[0016]
These tack papers were evaluated for quality on five items of peel strength, printability, writing suitability, stamping suitability, and ink jet printing suitability. The results are tabulated and shown in FIG. Here, ◎ represents an evaluation that is very good, ◯ is good, Δ is slightly inferior, and × is extremely inferior. As can be understood from this evaluation result, the tack paper 10 of the present application was evaluated as good or better in all items, but in Comparative Example 1, it was evaluated that it was extremely inferior in each item other than the peeling force, and Comparative Example In No. 2, it was evaluated that the printing aptitude was slightly inferior and the inkjet printing aptitude was extremely inferior.
[0017]
The present invention is not limited to the embodiments described above, for example, the width and number of de Yukkeru 4,4a or installation interval, is depending on the width of the width and the release agent layer disposed portion of the continuous paper 1 Is set as appropriate. Further, the means for closing the blowout port 3 of the die coating head 2 is not limited to the above-mentioned Duckels 4 and 4a.
[0018]
【The invention's effect】
As is apparent from the above description, according to the release paper manufacturing method according to claim 1 of the present application, it has not only good peeling force but also good printability, writing suitability, and stamping that could not be obtained conventionally. A release paper with a release agent layer that is partially suitable and suitable for ink jet printing can be obtained , and since a water-based penetration inhibitor is used, the coating work can be efficiently performed. an effect that the penetration inhibitor occurrence of wrinkles caused by the use of Ru can be prevented.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a state in which a penetration preventing agent layer is partially applied to continuous paper.
FIG. 2 is a schematic cross-sectional view showing a manufactured release paper.
FIG. 3 is a cross-sectional view of tack paper targeted for quality evaluation.
FIG. 4 is a comparison table showing the results of quality evaluation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Continuous paper 2 Die coating head 3 Outlet 4,4a Duckel 5 Penetration inhibitor layer 6 Release agent layer 7 Release paper 8 Adhesive layer 9 Fine paper 10 Tack paper

Claims (1)

A method for producing a release paper in which a release agent layer is partially provided on at least one surface side of the paper, wherein the blowout port of the die coating head for applying the permeation preventive agent is opposed to the continuous paper transport path. In addition to disposing the part other than the part corresponding to the part where the paper release agent is to be installed at the outlet, the penetration preventing agent is applied corresponding to the part where the paper release agent is scheduled to be transferred while transporting the paper. after forming the penetration inhibitor layer by partially forming a release agent layer by applying a release agent to the penetration inhibitor layer, a further method of manufacturing a release paper cutting the paper into a predetermined size The penetration inhibitor is mainly composed of an aqueous penetration inhibitor selected from povals, acrylic emulsions, SBR latexes, and starches, and the non-coated portion of the aqueous penetration inhibitor has a coating surface and Is the opposite side After working to by attaching water moisture equalization of paper from, dried, the manufacturing method of exfoliation paper you and forming a penetration inhibitor layer.

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