JP3061086B2 - Form tack label paper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous slip sheet which is Z-folded at a horizontal perforation and has a tack sheet provided with an upper sheet, an adhesive and a release sheet, which is used for a printer with a computer output. The present invention relates to a form tack label sheet on which the address of a letter is printed and used as a label.

[0002]

2. Description of the Related Art Foam paper is provided with marginal punches on the left and right sides of the paper and 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 sheet is folded in a zet manner for each sheet. Further, the sheet can be easily cut along the perforations. This perforation is hereinafter simply referred to as a horizontal perforation. Among the foam papers, foam tack label paper is a release paper composed of high-quality paper laminated with glassine paper or polyethylene and coated with silicone resin, and art paper, coated paper, high-quality paper, laminated paper as top paper, It is obtained from a tack sheet formed by laminating a film or the like via an adhesive. The top paper of the tack paper is punched into various label shapes, and extra portions are removed to expose the release paper. FIG. 1 shows an example of such a form tack label sheet. FIG. 1 is a plan view of a first typical form tack label paper. As shown in FIG. 1, horizontal perforations 4 for z-folding the exposed release paper portion for each sheet 1 are processed at equal intervals. Furthermore, in order to cut out each label 2 in a state where it is stuck to release paper, vertical perforations and horizontal perforations for cutting may be processed.

As shown in FIG. 2, there is also a form tack label paper in which vertical and horizontal slits 5 and 6 are formed in an upper paper and divided into a plurality of labels 2 instead of removing the cake. FIG. 2 is a plan view of a second typical form tack label sheet. Even with such a label, the release paper is substantially exposed at the slit between the labels. Such a form tack label sheet is folded in a Z-fold state before printing. After printing, it is assumed that the paper discharged from the printer takes a hanging state as shown in FIG. 3 and then returns to a Z-folded state and folds again. FIG. 3 is a perspective view showing the form tack label paper being discharged from the paper discharge unit of the printer.

[0004]

However, since the horizontal perforations receive the weight of the paper itself depending on the height of the paper discharge position of the printer when the printer is in a hanging state, the fold holding angle of the Z-fold shown in FIG. θ increases. For this reason, when the sheet is Z-folded again, the folds of the horizontal perforations are not retained, and the sheet becomes a continuous sheet, and when output from the printer, the sheet does not return to the folded state. Problems may occur. In such a case, the paper overflows at the paper discharge section of the printer, and the paper is jammed, leading to a problem that continuous output cannot be performed.

[0005] In order to solve this problem, the present inventors have pursued a cause of making it difficult to hold the zigzag fold. As a result, it was found that the cause was curl behavior peculiar to foam tack label paper as described below. When the form tack label paper is output to the printer under various environmental humidity conditions, the curl behavior of the release paper and that of the top paper are different, so that a specific curl behavior is exhibited.

For example, when high-quality paper is used as the top paper, in a low humidity environment, the label portion 2 shrinks in the MD (machine direction) direction due to the release of moisture from the top paper surface, while the release paper 11 is also opposite to the top paper. As a result, the label portion of the entire form tack label paper is curled in the normal direction, and the portion from which the top paper is removed is curled in the opposite direction. For this reason, the portion from which the cake is removed rises, and shows a complicated curl behavior in a reverse kamaboko shape. This state is shown in FIG. FIG. 4 is a cross-sectional view of the form tack label paper showing a curl behavior in this low humidity environment.

On the other hand, in a high humidity environment, the elongation of the top paper and the elongation of the release paper are different from each other. This state is shown in FIG. FIG.
FIG. 2 is a cross-sectional view of the foam tack label paper in a state showing curl behavior in this high humidity environment. 4 and 5 described above.
1 is a slit-shaped exposed portion of the release paper in FIG. 1 showing a plan view of the form tack label paper because of the mountain-folded portion A or the valley-folded portion B shown in FIG. Become. In FIG. 1, C is used to avoid complication.
Only one part is shown, and the rest are omitted. The fold disappears from the part D of the horizontal perforation intersecting with the part C, and all the folds of the horizontal perforation disappear in the state where the form tack label paper hangs down. Similarly, in order to avoid complication, only one portion D is shown, and the rest is omitted. As can be seen from FIGS. 4 and 5 described above, such a curl behavior is [prior art]
In the first typical form tack label paper (see FIG. 1) described in the section. However, the curl behavior is similar to that of the second typical form tack label paper (see FIG. 2) shown in the above paragraph, although the release paper is substantially exposed in the slit portion. Appears.

As can be understood from the above description, in order to hold the horizontal perforation of the sheet for Z-folding, FIG.
In addition, it is conceivable to prevent the occurrence of the ridge break portion A or the valley break portion B shown in FIG. For this purpose, the paper moisture and curl were controlled so that the curl behavior of the top paper and the release paper became the same, and a method of minimizing the absorption and release of paper moisture was taken. However, it has been difficult to produce a foam tack label paper which does not exhibit the characteristic curl behavior as described above over a wide humidity range from 20% RH to 90% RH by any of the methods.

Accordingly, an object of the present invention is to provide a foam tack label sheet which does not cause a peculiar curl behavior even in a wide humidity range in order to hold a horizontal perforation of the sheet for Z-folding. .

[0010]

A form tack label sheet according to the present invention is a form tack label sheet comprising a plurality of labels and a release sheet on which the plurality of labels are pasted via an adhesive. The release paper has a horizontal perforation for zet folding, and a plurality of labels are arranged in an area excluding the horizontal perforation in both the paper flow direction and the paper width direction. Then, the exposed portion of the release paper is extended in the flow direction, the non-cutting rate of the horizontal perforation in the vicinity of the portion intersecting with the horizontal perforation is set to 55 to 100%, and the non-cutting rate of the other portions is set to Is also small,
Further, it is a form tack label paper of 20 to 55%.

[0011]

The exposed portion of the release paper between the labels in the width direction of the paper is substantially extended in the flow direction, and the horizontal perforation near the crossing with the horizontal perforation has a non-cutting rate of 55 to 100%;
Since the non-cutting ratio of the other portions is smaller than the non-cutting ratio and 20 to 55%, even when the form tack label paper hangs down, the z-folded horizontal perforation allows the fold holding angle of the z-fold. Is kept below 172 degrees.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The inventors of the present invention have intended to maintain the Z-fold of form tack label paper even when the environmental humidity changes.
The holding force of the fold in the Z-fold horizontal perforation was examined. When the form tack label paper is ejected from the printer, Z-folded sequentially in a suspended state, and folded, the force (F0) applied to the horizontal perforation is the weight (F1) of the paper and the fold of the horizontal perforation due to curling. When the relationship of the force (F2) to eliminate the inequality satisfies the relationship of F0> F1 + F2, the fold holding angle becomes 180 degrees or less,
Since the horizontal perforation can always hold the folded shape, no trouble occurs during Z-folding.

However, when the form tack label paper is observed in a suspended state, of the weights applied to each horizontal perforation,
Since the sheet weight F1 becomes larger as the suspension length becomes longer, the fold at the top of the suspension is difficult to maintain its shape, and the angle formed by the two sheets through the perforation (fold hold) Corner) becomes large and approaches 180 degrees, and the fold disappears.

Further, since the form tack label paper has a specific curl, which is more or less different, the shape of the label is inverted at low humidity, and the shape of label at high humidity is as described above. Some of the folds of the perforations are lost, and the holding power of the folds of the perforations is reduced. As a result, the folds disappear and the sheet behaves as a continuous sheet. That is, the above relational expression cannot be maintained.

In order to solve this problem, the present inventors have conducted intensive studies and as a result, by strengthening the fold holding angle of the horizontal perforations to be small, the folds of the horizontal perforations are always held, and the smooth Z is maintained. It has been found that folding can be maintained under a wide range of environmental conditions, and the present invention has been achieved. The present inventors paid their attention to the horizontal perforation in strengthening the fold holding angle to be small. The details will be described below.

(Experimental Example 1 to Experimental Example 5 and Comparative Example 1 to Comparative Example 4) A high quality paper of 85 g / m ² was heated and pressurized to obtain glassine paper. was m ² coated release paper. The release paper was made into a sheet of foam paper having a size of 15 inches × 11 inches, and an adhesive was placed on the foam paper.
After applying 0 g / m ^2, a label paper was obtained by bonding a high-quality paper of 64 g / m ² (paper thickness 70 μm) as an upper paper.
Die cut the top sheet of the obtained label paper to 42m in height
mx 84mm width label on one sheet 4 width direction,
Form tack label paper was prepared such that 24 sheets were arranged in a total of 24 sheets in the vertical direction. This is called an arrangement of 6 rows and 4 columns. Here, the interval between each sheet is 5 mm in the width direction and 5 in the vertical direction.
mm.

A uniform perforation was perforated between each sheet of the obtained foam tack label paper. Among the drilling conditions, a tip angle of 30 degrees and a blade thickness of 0.7 mm were the same in any of the experimental examples and comparative examples. By appropriately changing the blade width and the groove width, various experimental and comparative examples were used. A non-cutting rate horizontal perforation was formed. For conditions such as the blade width, the groove width, and the non-cutting ratio used in each of the examples, the experimental examples, and the comparative examples, see Tables 1 and 2 described below.

Here, the non-cutting rate α is defined by the following equation (1). α = (L2 / (L1 + L2)) * 100 (%) Expression (1) L1: cutting width (width of a horizontal perforation created by a form printing machine, ie, perforation of a perforation) Flat blade width), L2: Non-cut width (interval between horizontal perforations created by a form printing machine, that is, the width of the groove of the flat blade perforating the perforation). The above L1 and L2 are shown in FIG. FIG. 6 is a view showing a horizontal perforation with an enlarged dog.

After the perforations were formed, each perforation was pressed with a roller weighing 5 kg to form a zigzag fold.

(Embodiments 1 and 2) In these embodiments, in order to reduce the ease of separating the label as much as possible, the non-cutting rate of only a part of the horizontal perforation is increased to provide a strong holding force. I tried to get a fold. That is, the non-cutting rate is increased only at the horizontal perforations at the portion D in FIG. 1 where the fold is lost first. The lateral width of the D portion is dmm, and the non-cutting ratio of the D portion and the non-cutting ratio of the horizontal perforation other than the D portion are shown in the table below. In Example 1, the condition of the flat blade was experimental example 3.
And Comparative Example 3. In Example 2, the conditions of the flat blade were the same as those in Experimental Example 5 and Comparative Example 3. This portion D can be said to be a portion that extends in the flow direction the exposed portion (gap portion) of the release paper between the labels in a label row composed of a plurality of labels 2 arranged in the paper width direction and intersects the horizontal perforation. . Other conditions such as release paper and folds were the same as those in Experimental Examples 1 to 5.

(Evaluation Method) A sample composed of five consecutive sheets of the form tack label paper prepared as described above
The state of being discharged from the paper discharge part of the printer was simulated by suspending under the environment of 20% RH at 25 ° C., 50% RH at 25 ° C., and 90% RH at 27 ° C. In this state, the Z of the uppermost first sheet and the second sheet where the load is most applied
The fold angle, 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, the sample of Comparative Example 1 exhibited a fold holding angle of 178 degrees or more. In this state, the fold holding force becomes unstable.
The sheet was opened to the point where each sheet became a continuous sheet of paper.
Further, in the samples of Comparative Examples 2, 3, and 4, the paper was in a continuous state due to curling under low or high humidity conditions. On the other hand, in each of Examples 1 and 2 and Experimental Examples 1 to 5, the fold holding angle was maintained at 172 degrees or less under each environment, and stable folds were maintained even when a little vibration or the like was applied.

The following conclusions were obtained from the above examples and the like. By setting the non-cutting rate α = (L2 / (L1 + L2)) * 100 (%) to 55% or more, the folds of the horizontal perforations can be always maintained, and a smooth Z-fold can be maintained under a wide range of 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 a flat blade conventionally used, L1 = 1.0 to 5.0 mm, L2 = 0.5 to 1.5 mm
mm, and the non-cutting ratio was 20 to 40%. The reason why the non-cutting rate is reduced by using the conventionally used flat blade may be that it is necessary to cut one sheet at a horizontal perforation by an automatic cutting machine called a buster in general foam paper. Conceivable. However,
Foam tack sheets are manually separated because the attached label may be peeled off by a buster. Therefore, as described above, a portion having a relatively high non-cutting ratio, that is, a portion having a non-cutting ratio of 55% or more found by the present inventors may be provided.

Of course, the fold holding angle is slightly different depending on the folding direction, such as a mountain fold in which the plane with the flat blade is folded outward and a valley fold in which the plane with the flat blade is folded inward. It has been found that by setting the non-cutting ratio to 55% or more, it is possible to maintain good holding force of the fold of the perforation.

In forming the perforations, it is necessary that the sheet can be easily separated and that the perforations have a holding force so that the perforations do not break during driving of the printer. From this point, also in the present invention, the non-cut width L2 of the perforation is from 0.3 mm to 2.0 mm,
Preferably, the length is set to 0.5 to 1.5 mm, which is a commonly used length. Further, from the viewpoint of ease of separation, the size of L2 is preferably long when the release paper has a small paper thickness and short when the release paper is thick. The thickness of the release paper used for the form tack label paper is usually 60 to 90 μm.

Further, when the shape of the sewing blade is an angled flat blade, the thinner the wall thickness, the larger the paper strength of the non-cut portion of the perforation, and it is more preferable to hold the Z-fold fold.

Further, if the non-cutting rate is set to 55% or more over all the horizontal perforations, depending on the release paper such as a thick paper, the perforation holding force becomes too large and it may not be easy to separate. Conceivable. The present invention is shown in FIG.
The non-cutting ratio is increased only for the horizontal perforation at the portion D which intersects the portion C which is the slit-shaped exposed portion of the release paper shown in FIG.
% Or less, the ease of separation as a whole can be set within a practical range. That is,
At least the exposed portion of the release paper between the label lines in the paper width direction is extended in the flow direction, and the non-cutting rate of the horizontal perforation near the crossing with the horizontal perforation is 55% or more,
By forming a horizontal perforation in which the non-cutting ratio of the other portions is smaller than the non-cutting ratio and 20 to 55%, the effect of holding the fold of the Z-fold can be obtained without impairing the cutout suitability. That is. For example, the non-cutting rate of the perforation of the portion D is 65%, and the non-cutting rate of the remaining perforations is 25%.

According to the trials of the present inventors, the weight of the roller used for the zet folding after the perforation was formed did not significantly affect the fold holding angle. Specifically, even when a roller of 1 kg to 10 kg was used, a substantially constant fold holding angle was obtained. In each of the above embodiments, an example in which the exposed portion of the release paper can be apparently confirmed between the label rows and the label columns is shown. 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 slit labels is substantially an exposed portion of the release paper, and the label arrangement as shown in FIG. As described above, the influence of the curling of the label was small. This figure 2
Also in the arrangement of the labels as described above, samples in which horizontal perforations were perforated were prepared and evaluated in the same manner as in each of the above-described embodiments. As a result, it has been found that even in such a label arrangement in which the exposed portion of the release paper cannot be visually recognized, the influence 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 a perforation while leaving the upper paper at the fold portion.

[0033]

According to the present invention, substantially the exposed portion of the release paper between the label lines in the paper width direction is extended in the flow direction, and the horizontal perforation near the intersection with the horizontal perforation has a non-cutting rate of 55% or more; Since the non-cutting ratio of the other portions is smaller than the cutting ratio and 20 to 55%, even when the form tack label paper hangs down, the Z-folded horizontal perforation allows the Z-fold fold holding angle to be 172. Degrees, so that the Z-fold is always maintained, and even after being ejected from the printer, a smooth Z-fold can be maintained under a wide range of environmental conditions, and a non-cutting rate of 55% or more is provided. This does not impair the cutting performance of the horizontal perforation due to the above.

[Brief description of the drawings]

FIG. 1 is a plan view of a first typical form tack label paper.

FIG. 2 is a plan view of a second typical form tack label paper.

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

FIG. 4 is a cross-sectional view of the form tack label paper in a state showing curl behavior in a low humidity environment.

FIG. 5 is a cross-sectional view of a form tack label sheet in a state showing curl behavior under a high humidity environment.

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

[Explanation of symbols]

 2: Label 4: Horizontal perforation 11: Release paper

Claims (1)

(57) [Claims] 1. A foam tack label paper having a plurality of labels and a release paper on which the plurality of labels are pasted via an adhesive, wherein the release paper has a horizontal perforation for zet folding. A plurality of labels are arranged in an area excluding the horizontal perforations in both the paper flow direction and the paper width direction, and a substantially exposed portion of the release paper between the labels in the paper width direction is extended in the flow direction; The non-cutting rate of the horizontal perforation in the vicinity of the portion intersecting with the horizontal perforation is set to 55 to 100%, the non-cutting rate of the other portion is smaller than the non-cutting rate, and 20 to 100%.
Form tack label paper characterized in that it is 55%.