JPH0648073A - Form tack label paper - Google Patents

Abstract

PURPOSE:To prevent generation of particular curl behavior in a wide humidity range in release paper on which a plurality of labels are stuck via a pressure sensitive adhesive by forming so transverse perforations in order to perform Z-folding in the transverse perforations of the part opposite to the exposed part of the release paper between label rows in the cross direction of a form having the specified noncutting rate. CONSTITUTION:Form tack label paper is equipped with a plurality of labels 2 and release paper 1 on which a plurality of labels 2 are stuck via a pressure sensitive adhesive. In the release paper 1, transverse perforations 4 are so formed in order to perform Z-fold that the noncutting rate of the transverse perforations 4 of the part opposite to the practically exposed part of the release paper 1 between label rows in the cross direction of a form is regulated to at least 55% or more. As a result, since the fold of the transverse perforations of the form is held in order to perform Z-folding, the form tack label paper is obtained wherein particular curl behavior is not caused even in a wide humidity range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous slip paper Z-folded by a horizontal perforation, which is used for a printer having a computer output, and has a structure of a top paper, a tack paper including an adhesive and a release paper. In addition, the present invention relates to a form tack label paper for printing a mailing address and the like for use as a label.

[0002]

2. Description of the Related Art Foam paper is provided with marginal punches on the left and right of the paper and is fed by a tractor pin of a printer. Further, the sheet is perforated at regular intervals in the lateral direction of the sheet, and the sheets are z-folded and folded for each sheet. Further, the sheet can be easily cut along the perforations. Hereinafter, this perforation is simply referred to as a horizontal perforation. Of the foam paper, foam tack label paper is release paper made by applying silicone resin to the surface of woodfree paper laminated with glassine paper or polyethylene, and art paper, coated paper, woodfree paper, laminated paper, as top paper. It is obtained from tack paper obtained by laminating a film or the like via an adhesive. The top paper of this tack paper is punched out into various label shapes and the excess portion is lees removed to expose the release paper. An example of such a form tack label paper is shown in FIG. FIG. 1 is a plan view of a first exemplary foam tack label paper. As shown in FIG. 1, lateral perforations 4 for z-folding each sheet 1 are processed at equal intervals on the exposed release paper portion. Further, in order to cut the label 2 attached to the release paper one by one, the vertical perforations and the horizontal perforations for cutting may be processed.

Further, as shown in FIG. 2, there is also a form tack label paper in which vertical and horizontal slits 5 and 6 are inserted in a top paper to divide it into a plurality of labels 2 instead of removing the lees. FIG. 2 is a plan view of a second typical foam tack label paper. Even in such a label, the release paper is substantially exposed in the slit portion between the labels. Such a form tack label paper is folded in a Z-folded state before being printed. After printing, the paper discharged from the printer is assumed to hang down as shown in FIG. 3 and then returned to the Z-folded state and folded. FIG. 3 is a perspective view showing the form tack label paper being discharged from the paper discharge portion of the printer.

[0004]

However, since the lateral perforations receive the weight of the paper itself depending on the height of the paper ejection position of the printer when the paper is in the hanging state, the fold holding angle of the Z-fold shown in FIG. θ becomes large. Therefore, when the paper is Z-folded again, the creases of the horizontal perforations are not retained and the paper becomes like one continuous sheet, and when it is output from the printer, it does not return to the folded state one by one. Problems can occur. In such a case, the paper discharge section of the printer overflows and jams, which leads to a problem that continuous output cannot be performed.

In order to solve this problem, the inventors sought the cause of making it difficult to hold the fold line of the z-fold. As a result, it has been found that the cause is the curling behavior peculiar to the foam tack label paper as described below. When the form-tack label paper is output to a printer under various environmental humidity conditions, the release paper and the top paper show different curling behaviors, and thus exhibit unique curling behaviors.

For example, when a high quality paper is used as the top paper, the label portion 2 shrinks around the MD (machine direction) direction due to the release of water on the surface of the top paper in a low humidity environment, while the release paper 11 is also opposite to the top paper. Since the paper shrinks in the direction, the label portion of the form-tack label sheet as a whole has a normal curl, and the portion of the form-tack label curled in the opposite direction. For this reason, the removed portion of the cake rises and exhibits an inverted kamaboko-like complicated curl behavior. This state is shown in FIG. FIG. 4 is a cross-sectional view of the foam tack label paper in a state where the curl behavior is exhibited in the low humidity environment.

On the other hand, in a high humidity environment, since the elongation of the top paper and the elongation of the release paper are different, a curd-like curl with a dull portion of the lees is shown. This state is shown in FIG. Figure 5
FIG. 4 is a cross-sectional view of a foam tack label paper showing a curling behavior in this high humidity environment. 4 and 5 above
Because of the mountain fold portion A or the valley fold portion B shown in Fig. 1, the slit-exposed portion C of the release paper in Fig. 1 showing the plan view of the form tack label paper is in a mountain fold or valley fold state. Become. In FIG. 1, C is used to avoid complication.
Only one part is shown and the rest are omitted. The folds disappear from the portion D of the horizontal perforations intersecting with the portion C, and all the folds of the horizontal perforations disappear when the form tack label paper hangs down. Similarly, in order to avoid complication, the D part is also shown only in one place and the rest is omitted. As can be seen from FIGS. 4 and 5, the curl behavior is [prior art].
Notably, the first exemplary foam tack label paper (see FIG. 1) described in Section 1. However, although the degree is relatively low, of course, the second typical foam tack label paper (see FIG. 2) shown in the same section has substantially the release paper exposed in the slit portion, and therefore the same curling behavior is obtained. Appears.

As can be seen from the above description, in order to hold the creases of the horizontal perforations of the paper for Z-folding, FIG.
It is conceivable to prevent the mountain fold portion A or the valley fold portion B shown in FIG. 5 from occurring. Therefore, we tried to control the paper moisture and curl so that the curl behavior of the top paper and release paper would be the same, and to minimize the absorption and release of paper moisture. However, in any of the methods, it was difficult to produce a foam tack label paper which does not exhibit the unique curling behavior described above over a wide humidity range from 20% RH to 90% RH.

Therefore, an object of the present invention is to provide a form tack label paper which does not cause a curling characteristic peculiar to a wide humidity range in order to hold the creases of the horizontal perforations of the paper for Z-folding. .

[0010]

The form tack label paper according to the present invention is a release paper on which a plurality of labels and the plurality of labels are pasted together with an adhesive, and at least the paper width direction. The non-cutting rate of the horizontal perforations of the portion facing the exposed portion of the release paper between the label lines of
Release paper formed for z-folding the horizontal perforations of 5% or more.

[0011]

Since at least the transverse perforation of the portion facing the exposed portion of the release paper between the label lines in the width direction of the paper has a non-cutting ratio of 55% or more, at least the form tack label paper hangs down. The z-folded horizontal perforations keep the zig-fold fold holding angle at 172 degrees or less.

[0012]

EXAMPLES The present inventors have made sure that the Z-fold of the foam tack label paper is maintained even if the environmental humidity changes.
The holding power of the creases of the lateral perforations of the Z fold was examined. When the form tack label paper is ejected from the printer and Z-folded in the suspended state, the force (F0) applied to the horizontal perforation is the weight of the paper (F1) and the crease of the horizontal perforation due to the curl. When the relationship of the force (F2) to eliminate is F0> F1 + F2, the fold holding angle is 180 degrees or less,
Since the horizontal perforations can always hold the folded shape, no trouble occurs when Z-folding.

However, when observing the form tack label paper in a suspended state, among the weights applied to each horizontal perforation,
Since the paper dead weight F1 increases as the hanging length increases, it is difficult to maintain the shape of the fold line of the horizontal perforation at the top of the hanging, and the angle formed by the two sheets of paper through the perforation (fold holding) The angle becomes large and approaches 180 degrees, and the fold disappears.

Further, the foam tack label paper, to a different extent, causes a peculiar curl associated with the inverted kamaboko-like label shape at low humidity and the kamaboko-like label shape at high humidity. Some of the folds of the horizontal perforations are lost, the holding power of the folds of the horizontal perforations is reduced, and as a result, the folds disappear and behave as a continuous sheet of paper. That is, the above relational expression cannot be maintained.

In order to solve this problem, the inventors of the present invention have earnestly studied and, as a result, reinforced so that the fold holding angle of the horizontal perforations becomes small, so that the folds of the horizontal perforations are always held, and a smooth Z The inventors have found that folding can be maintained under a wide range of environmental conditions and have reached the present invention. The present inventors have paid attention to the lateral perforation in order to strengthen the lateral perforation so that the fold holding angle becomes smaller. Specific examples will be shown below.

(Example 1 to Example 5, Comparative Example 1 to Comparative Example 4) A high-quality paper having a weight of 85 g / m ² was heated and pressed to obtain glassine paper. One side of the glass release agent was 1 g / g of silicone release agent. m ²
It was applied and used as release paper. The release paper is 1 sheet size 1
5 inch x 11 inch foam paper, coated with 20 g / m ² of adhesive on it, then 64 g / m as top paper
² A label paper was obtained by bonding high quality paper (paper thickness 70 μm). The top paper of the obtained label paper was die-cut to prepare a foam tack label paper in which a total of 24 labels having a width of 42 mm and a width of 84 mm were arranged on one sheet, four in the width direction and six in the lengthwise direction. . This is called a 6-row, 4-column arrangement. Here, the distance between each sheet is 5 mm in the width direction,
The vertical direction is 5 mm.

Uniform perforations were punched between each sheet of the resulting foam tack label paper. Among the drilling conditions, the tip angle of 30 degrees and the blade wall thickness of 0.7 mm are the same in any of the examples and the comparative examples, and by varying the blade width and the groove width appropriately, various examples and comparative examples can be obtained. A non-cut rate horizontal perforation was formed. See Tables 1 and 2 below for conditions such as the blade width, groove width and non-cutting ratio used in each of the examples and comparative examples.

Here, the non-cutting rate α is defined by the following equation (1). α = (L2 / (L1 + L2)) * 100 (%) Equation (1) L1: cutting width (width of the lateral perforation created by the foam printing machine, that is, perforation of the perforation) Width of flat blade), L2: non-cutting width (distance between horizontal perforations formed by a foam printing machine, that is, the width of the groove of the flat blade that perforates the perforations). The above L1 and L2 are shown in FIG. FIG. 6 is an enlarged view of the horizontal perforations.

After the perforations were formed, each perforation was pressed by a roller having a weight of 5 kg to form z-folds.

(Embodiment 6 and Embodiment 7) In these embodiments, the non-cutting ratio of only a part of the horizontal perforations is increased so as to prevent the label from being easily separated as much as possible, so that a strong holding force is obtained. I tried to get a fold. That is, D in the above figure, where the fold line is lost first
The non-cutting rate was increased only for the partial transverse perforations. The lateral width of this D portion was set to dmm, and the non-cutting rate of the D portion and the non-cutting rate of the horizontal perforations other than the D portion are shown in the table below. In Example 6, the conditions of the flat blade were the same as those in Example 3 and Comparative Example 3. In addition, in Example 7, the conditions of the flat blade are those in Example 5.
And the same as Comparative Example 3. It can be said that the D portion is a portion of the horizontal perforations that faces the exposed portion (gap portion) of the release paper between the labels in the label row formed by the plurality of labels 2 arranged in the paper width direction. Other conditions such as release paper and folds were the same as those in Examples 1 to 5 above.

(Evaluation Method) A sample composed of five continuous sheets of foam tack label paper prepared as described above was used at 20 ° C., 20% RH, 25 degrees and 50%.
The state of being ejected from the paper ejection unit of the printer was simulated by suspending under each environment of RH and 27 degrees 90% RH. In this state, the Z-fold opening angle of the uppermost first sheet and the second sheet to which the load is most applied, that is, the fold holding angle θ was measured. The measurement results are shown in Tables 1 and 2.

[0022]

[Table 1]

[0023]

[Table 2]

(Evaluation Results) In Tables 1 and 2, Comparative Example 1
Of the sample showed a crease holding angle of 178 degrees or more.
In this state, the crease holding force became unstable, and when a little vibration was applied, the crease was opened up to 180 degrees, and each sheet became one continuous sheet. Further, in the samples of Comparative Examples 2, 3, and 4, the paper was curled under the condition of low humidity or high humidity, and thus it was in a continuous state. On the other hand, any of Examples 1 to 8
Also, the crease holding angle was maintained at 172 degrees or less under each environment, and the creases were kept stable even if a slight vibration or the like was applied.

The following conclusions were obtained from the above examples. Non-cutting rate α = (L2 / (L1 + L2)) * 100 (%)
Is 55% or more, the creases of the horizontal perforations can be always maintained, and a smooth Z fold can be maintained under wide environmental conditions. For example, L1 = 0.5 mm, L2 = 1.0 (non-cutting rate 67%) or L1 = 0.8 mm, L2 = 1.0 (non-cutting rate 56%).

On the other hand, for the flat blades that have been conventionally used, L1 = 1.0 to 5.0 mm, L2 = 0.5 to 1.5
mm, and the non-cutting rate was 20 to 40%. The reason why the non-cutting rate is reduced by using this conventionally used flat blade is that it is necessary to cut each sheet at the horizontal perforations by an automatic cutting machine called a buster in general foam paper. Conceivable. However,
Foam-tack paper may be peeled off by the buster because the attached label may be peeled off, so the separation is done manually. Therefore, it was confirmed that even if the non-cutting rate is relatively large as described above, that is, the non-cutting rate of 55% or more found by the present inventors this time, there is no problem in the ease of cutting.

Of course, the fold holding angle is slightly different depending on the folding direction, such as a mountain fold that folds the surface with the flat blade outward, a valley fold that folds the surface with the flat blade inside, etc. It was found that by keeping the non-cutting ratio of 55% or more, good retention of the creases in the perforations can be maintained.

In forming the perforations, it is necessary that the paper can be easily separated, and that the perforation holding force is not generated so as not to cause the perforations during the driving of the printer. From this point, also in the present invention, the non-cutting width L2 of the perforations is 0.3 mm to 2.0 mm,
Desirably, it is set to a commonly used length of 0.5 to 1.5 mm. Further, from the viewpoint of ease of separation, it is common sense that the size of L2 should be long when the thickness of the release paper is small and short when it is thick. However, the thickness of the release paper used for the form tack label paper is usually 60 to 90 μm,
Even if the paper thickness fluctuates within this range, there is almost no effect on the ease of manual separation.

Further, when the shape of the sewing blade is a flat blade with an angle, the thinner the thickness, the larger the paper strength at the non-cutting portion of the perforation, which is more preferable for maintaining the Z-fold fold.

If the non-cutting rate of the thick release paper is 55% or more over all of the horizontal perforations, the perforation holding force becomes too large and it may be difficult to separate the perforations. . In such a case, if necessary, the non-cutting rate is increased only for the horizontal perforation of the portion D which intersects the slit-shaped exposed portion C of the release paper shown in FIG. By setting the non-cutting rate of the perforation line of 55% or less, the ease of separating the perforation as a whole could be set within a practical range. That is, the Z-fold fold is formed by forming a horizontal perforation having a non-cutting rate of 55% or more at least at a portion facing the exposed portion of the release paper between label lines in the paper width direction. This means that the effect of retention can be obtained. For example, the non-cutting rate of the perforation of the D portion is 65
%, And the non-cutting rate of the remaining perforations is 25%.

According to the trial conducted by the inventors, the weight of the roller used for z-folding after making the perforations did not significantly affect the fold holding angle. Specifically, even if a roller of 1 kg to 10 kg was used, a substantially constant crease holding angle was obtained. In each of the above examples, the exposed portion of the release paper can be visually confirmed between the label rows and the label columns. Even in the label arrangement as shown in FIG. 2 in which the exposed portion of the release paper cannot be visually recognized, the space between the labels having slits is substantially the exposed portion of the release paper, and the label arrangement as shown in FIG. As mentioned above, the effect of label curl was small. This Figure 2
Also in the arrangement of the labels as described above, a sample in which horizontal perforations were perforated was prepared and evaluated in the same manner as in each of the examples described above. As a result, it was found that even in such a label arrangement in which the exposed portion of the release paper cannot be visually confirmed, the effect of curling can be reduced and a stable fold can be maintained by the horizontal perforations of the present invention.

As an application example of the present invention, the perforation strength can be increased by forming the perforation while leaving the top paper at the fold portion.

[0033]

EFFECTS OF THE INVENTION Since the transverse perforations of the portion substantially facing the exposed portion of the release paper between the label rows in the paper width direction have a non-cutting rate of 55% or more, even when the form tack label paper hangs down. Since the z-folded horizontal perforation keeps the z-fold fold holding angle at 172 degrees or less, the z-fold is always held and the smooth z-fold is maintained under a wide environmental condition even after being discharged from the printer. be able to.

[Brief description of drawings]

FIG. 1 is a plan view of a first exemplary foam tack label paper.

FIG. 2 is a plan view of a second exemplary foam tack label paper.

FIG. 3 is a perspective view showing the form tack label paper being discharged from the paper discharge unit of the printer.

FIG. 4 is a cross-sectional view of a form tack label sheet in a state where curl behavior is exhibited in a low humidity environment.

FIG. 5 is a cross-sectional view of a foam tack label paper in a state where it exhibits curling behavior in a high humidity environment.

FIG. 6 is an enlarged plan view showing a horizontal perforation.

[Explanation of symbols]

 2: Label 4: Horizontal perforation 11: Release paper

Claims (1)

[Claims] 1. A plurality of labels, and a release paper on which the plurality of labels are attached via an adhesive, wherein at least a substantially exposed portion of the release paper between label rows in the paper width direction. A form-tack label sheet, comprising: a release paper formed for z-folding the horizontal perforations, the non-cutting rate of the horizontal perforations of the facing portion being 55% or more.