JP2014066892A - Label continuous body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a label continuous body that has low initial adhesive force while the reduction in adhesive force to a patched object is suppressed.SOLUTION: The label continuous body is a laminated body having a base material layer 20 and an adhesive layer 30 formed of an adhesive agent on the lower layer side of the base material layer 20. The adhesive layer 30 contains a surfactant. In this configuration, the surfactant is contained in the adhesive layer 30, so that the initial adhesive force is suppressed to be low. After the label continuous body is patched to a patched object, the adhesive agent wetly spreads to an interface 31 between the label continuous body and the patched object increases gradually. Therefore, the reduction in adhesive force to the patched object is minimum.

Description

  The present invention relates to a label continuum. In particular, the present invention relates to a label continuum that suppresses initial adhesive strength.

  In order to reattach the label, it is advantageous that the initial adhesive strength is low. Moreover, when handling a label with a label sticking machine etc., in order to fix or move a label, it becomes necessary to hold | maintain a label with a roller. At that time, if the label is a label without a backing paper, the adhesive is not covered with the backing paper. Therefore, if the label is held by a roller, the adhesive may directly touch the roller and stick to the roller. In order to avoid this problem, the initial adhesive strength is preferably low.

  By the way, Patent Document 1 discloses a technique for creating a non-adhesive surface by further laminating a non-adhesive layer on a part of an adhesive layer of a labelless continuous substrate. According to this configuration, it is described that “the label feeding (peeling property) is good” (see paragraph [0010] and the like). For example, if this technique is applied to reduce the adhesive strength of the label continuum, it is considered that re-sticking or sticking to a roller can be suppressed.

JP-A-9-106251

  However, the adhesive strength of the label continuum should be determined in relation to the object to be affixed with the label, and if the adhesive strength is reduced as a measure against re-sticking or sticking to the roller, the label continuum As a result, the use of the label generated from the label is narrowed.

  This invention is made | formed in view of the situation which concerns, and it aims at providing the label continuous body with low initial stage adhesive force, suppressing the fall of the adhesive force with respect to a sticking thing.

  The label continuum of the present invention is a label continuum that is a laminate having a base material layer and an adhesive layer formed of an adhesive on the lower layer side of the base material layer, and the surfactant is in the adhesive layer. Contained.

  According to the said structure, since surfactant is contained in the said adhesion layer, initial stage adhesive force is suppressed low. In addition, after being attached to the object to be pasted, the pressure-sensitive adhesive gradually increases because the pressure-sensitive adhesive wets and spreads on the interface with the object to be pasted. For this reason, a decrease in the adhesive strength to the object to be pasted is minimized.

  In the label continuum of the present invention, the surfactant is preferably a silicon-based material. Since the silicon-based surfactant is a general-purpose material, the above effects can be obtained with an easily available material.

  In the label continuum of the present invention, the content of the surfactant is preferably 0.2% by weight or more and 5% by weight or less.

  Since the surfactant content is 0.2% by weight or more, the effect of suppressing the initial adhesive force by the surfactant is large. Moreover, since it is 5 weight% or less, the fall of the adhesive force with respect to a sticking object is suppressed.

  It is preferable that the label continuous body of the present invention has a release layer having peelability with respect to the pressure-sensitive adhesive in the uppermost layer.

  According to the said structure, since it has the peeling layer which has peelability with respect to this adhesive in an uppermost layer, even when a label continuous body is rolled, an adhesive does not adhere to an uppermost layer. Therefore, it is easy to supply as a wound label continuous body.

  The label continuum of the present invention further includes a release paper having a release surface having releasability to the adhesive, and the release paper is disposed on the lower layer side of the adhesive layer so that the release surface is in contact with the adhesive layer. Are preferably laminated.

  According to the present invention, it is possible to provide a baseless label continuum that is less likely to stick to a roller while suppressing a decrease in adhesive strength to an object to be pasted.

It is a perspective view of the label continuum concerning the embodiment of the present invention. It is sectional drawing in the longitudinal direction of the label continuous body. It is a schematic diagram explaining the state of the adhesion layer of the label continuous body, Comprising: (a) is before affixing, (b) shows the state after affixing. It is a graph which shows the relationship between the addition amount of surfactant, the adhesive force immediately after sticking, and the adhesive force after 30 minutes progress.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment in which the present invention is applied to a mountless label continuous body will be described with reference to FIGS. In the following description, the directions and directions described in the drawings are used.

  FIG. 1 is an overall perspective view of the label continuum. The long continuous label is rolled to finish. By cutting the label continuous body into a predetermined size, a label without a mount is formed. A plurality of perforations 50 as cutting lines for facilitating such cutting are provided in parallel to each other in the width direction.

  As shown in FIG. 2, an adhesive layer 30 formed by laminating an adhesive for attaching the label without a mount to an object to be attached on the lower layer side in the thickness direction of the base material layer 20 formed of fine paper. Is formed. In addition, a release layer 10 is formed on the upper layer side of the base material layer 20 by laminating a release agent mainly composed of a silicon resin having releasability with respect to the same adhesive. Therefore, even if it is a case where it is rolled, the pressure-sensitive adhesive of the pressure-sensitive adhesive layer 30 can be easily peeled without sticking to the peelable layer. Since FIG. 2 is an image diagram for explaining the configuration, it does not correspond to the actual thickness of each layer.

  The adhesive layer 30 contains polyether-modified dimethylpolysiloxane that is a silicon-based surfactant. The content is not particularly limited, but is preferably 0.2% by weight or more because a remarkable effect is exerted in suppressing the initial adhesive strength. Furthermore, if it is 0.5% by weight or more, the effect of suppressing the initial adhesive strength is further increased, and thus it is more preferable. Moreover, since the fall of the adhesive force with respect to a sticking object will become remarkable when it exceeds 5 weight%, it is preferable that content is 5 weight% or less.

  With this configuration, the label continuum suppresses the initial adhesive strength and has sufficient adhesive strength for an object to be pasted. The reason is not known in detail, but is thought to be as follows.

  As shown in FIG. 3A, the surfactant 40 included in the adhesive layer has a hydrophilic end 41 having a hydrophilic group and a hydrophobic end 42 having a hydrophobic group. At the interface 31 between the adhesive layer 30 and the gas phase, the surfactant is arranged with the hydrophobic end 42 facing the gas phase. This surfactant film suppresses the contact between the pressure-sensitive adhesive layer 30 and the object to be stuck, so that the initial pressure-sensitive adhesive force of the pressure-sensitive adhesive layer 30 is reduced.

  On the other hand, when the label continuum is attached to the object to be pasted, the previous interface 31 is not the interface between the adhesive layer 30 and the gas phase, but the interface between the adhesive layer 30 and the object to be adhered. For example, if the adherend has polarity, the hydrophobic end 42 is repelled from the interface with the adherend, so that the surfactant is separated from the interface 31 as shown in FIG. It moves into the adhesive layer 30. As a result, since the adhesive layer 30 is in direct contact with the adherend, the adhesive force of the adhesive layer 30 to the adherend is greater than the initial adhesive force.

  According to the present embodiment described above, the following effects can be obtained as described above.

  (1) In this embodiment, since the uppermost layer has the release layer 10 having peelability with respect to the pressure-sensitive adhesive, the pressure-sensitive adhesive does not adhere to the uppermost layer even when the label continuous body is rolled. Therefore, it is easy to supply as a wound label continuous body.

  (2) In this embodiment, since the content of the surfactant contained in the adhesive layer 30 is 0.2% by weight or more, the initial adhesive force is suppressed by the surfactant. Moreover, since it is 5 weight% or less, the fall of the adhesive force with respect to a sticking object is suppressed.

  (3) In this embodiment, since the surfactant is silicon-based, it is possible to obtain a label continuum comprising a pressure-sensitive adhesive layer 30 that is a general-purpose raw material and has a low initial adhesive strength and a high adhesive strength after deposition. it can.

  (4) In this embodiment, since the surfactant for improving peelability is contained in the adhesive layer 30, the initial adhesive force is suppressed low. In addition, after being attached to the object to be pasted, the pressure-sensitive adhesive gradually increases because the pressure-sensitive adhesive wets and spreads on the interface with the object to be pasted. For this reason, a decrease in the adhesive strength to the object to be pasted is minimized.

  In addition, you may change the said embodiment as follows.

  In the above embodiment, the release layer 10 is formed of a silicon-based release agent, but may be formed of another release agent. What is necessary is just to select an optimal thing suitably according to the characteristic of an adhesive.

  In the above embodiment, the base material layer 20 is made of high-quality paper, but may be other paper material or synthetic resin, or may be a resin such as a polyethylene terephthalate (PET) film. Further, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene (PP), high density polyethylene (HDPE), or the like may be used depending on the application. Moreover, a transparent material may be sufficient and a colored material may be sufficient.

  -In the said embodiment, it has the peeling layer 10 which has peelability with respect to an adhesive in the uppermost layer. However, if the uppermost layer and the adhesive layer 30 are not in direct contact with each other, such as having a separate release paper or not having to be rolled up, the cost can be reduced by omitting the release layer 10. It may be reduced.

  -According to the said embodiment, although content of surfactant is 0.2 to 5 weight%, content may be outside this range. Depending on the application, if the adhesive strength after pasting may be low, it may exceed 5% by weight, and if used for an application where the suppression of the initial adhesive strength is not so required, it is 0.2% by weight. The content may be less than%.

  -According to the above embodiment, the polyether-based polyether-modified dimethylpolysiloxane is used as the surfactant, but there may be a polyetherester-modified hydroxyl group-containing dimethylpolysiloxane or a hydroxyl group-containing polyether-modified dimethylpolysiloxane. . Further, it may not be silicon-based. In short, since the initial adhesive force may be suppressed, the type of the surfactant is not limited.

  -According to the said embodiment, although the label continuous body without a mount is formed from three layers, the peeling layer 10, the base material layer 20, and the adhesion layer 30, you may have another layer. For example, a heat-sensitive layer that develops color by heat may be provided between the base material layer 20 and the release layer 10. If it is this structure, the label continuous body without mount can be used for many uses as a thermal label continuous body. Moreover, it is good also as a printed label continuous body as a structure provided with the printing layer. In addition, an undercoat layer or the like may be provided for the purpose of improving adhesion between layers, or a protective layer or the like for improving vinegar resistance, oil resistance, or the like may be provided. Other configurations are not particularly limited as long as the release layer 10, the base material layer 20, and the adhesive layer 30 are provided.

  -According to the above embodiment, the long continuous paperless label continuous body is provided with a plurality of perforations 50 as cutting lines for facilitating cutting. Other cutting structures such as lines may be provided. In short, there is no particular limitation as long as it can be easily cut. In addition, when used with a labeling machine having a cutting function, or when used while cutting to a necessary length with scissors, etc., the configuration of perforations may be omitted unless particularly necessary. .

  -According to the said embodiment, although the label continuous body without mount is formed from the peeling layer 10, the base material layer 20, and the adhesion layer 30, you may provide the other layer. For example, a heat-sensitive layer that develops color by heat or a pressure-sensitive layer that develops color by pressurization may be provided between the release layer 10 and the base material layer 20. Furthermore, a printing layer may be provided above or below the release layer to form a label continuum with good aesthetics and information. These may be provided together.

  In addition, in the above embodiment, the present invention is applied to a label continuous body without a mount, but may be applied to a label continuous body having a release paper in the lower layer of the adhesive layer 30. In this case, as described above, the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 30 does not stick even if it is rolled up, so that the release layer 10 may be omitted.

[Example]
Hereinafter, examples and comparative examples of the label continuum will be described to confirm the effects.

On the side opposite to the release layer 10 of the kraft paper as the base material layer 20 having a thickness of 0.1 μm formed of a silicone resin and having a release layer 10 of 0.1 μm, a general-purpose type acrylic emulsion adhesive is a surfactant. A pressure-sensitive adhesive in which 0.2% by weight of polyether-modified dimethylpolysiloxane is added to the total amount of the pressure-sensitive adhesive is applied at 14 g / m ² to obtain a continuous label. The label continuum was cut into a width of 25 mm and a length of 150 mm for an adhesive strength test, and a width of 13 mm and a length of 30 mm for a ball tack test to obtain an experimental sample piece.

(Adhesion test)
The prepared sample piece is attached to a polywrap film in a constant temperature room at 5 ° C. Adhesive strength was measured by 180 ° peeling method (JIS Z 0237) immediately after pasting the sample piece and after leaving it for 30 minutes. The results are shown in Table 1.

(Ball tack test)
An inclined ball tack test (JIS Z 0237) was performed. The results are shown in Table 1.

  A test piece of Example 2 was obtained in the same manner as in Example 1 except that 0.5% by weight of the polyether-modified dimethylpolysiloxane was added to the total amount of the pressure-sensitive adhesive, and the same test as in Example 1 was performed. . The results are shown in Table 1.

  A test piece of Example 3 was obtained in the same manner as in Example 1 except that 1.0% by weight of the polyether-modified dimethylpolysiloxane was added to the total amount of the pressure-sensitive adhesive, and the same test as in Example 1 was performed. . The results are shown in Table 1.

  A test piece of Example 4 was obtained in the same manner as in Example 1 except that 1.5% by weight of the polyether-modified dimethylpolysiloxane was added to the total amount of the pressure-sensitive adhesive, and the same test as in Example 1 was performed. . The results are shown in Table 1.

  A test piece of Example 5 was obtained in the same manner as in Example 1 except that 3.0% by weight of the polyether-modified dimethylpolysiloxane was added to the total amount of the pressure-sensitive adhesive, and the same test as in Example 1 was performed. . The results are shown in Table 1.

  A test piece of Example 6 was obtained in the same manner as in Example 1 except that 5.0% by weight of the polyether-modified dimethylpolysiloxane was added to the total amount of the pressure-sensitive adhesive, and the same test as in Example 1 was performed. . The results are shown in Table 1.

  A test piece of Example 7 was obtained in the same manner as in Example 1 except that 10.0% by weight of the polyether-modified dimethylpolysiloxane was added to the total amount of the pressure-sensitive adhesive, and the same test as in Example 1 was performed. . The results are shown in Table 1.

[Comparative Example 1]
A test piece of Comparative Example 1 was obtained in the same manner as in Example 1 except that the polyether-modified dimethylpolysiloxane was not added to the adhesive, and the same test as in Example 1 was performed. The results are shown in Table 1.

Further, FIG. 4 shows the relationship between the addition amount of the polyether-modified dimethylpolysiloxane and the adhesive strength, and the relationship between the former and the ball tack value.

  Here, it is considered that the adhesive force immediately after the ball tack and sticking becomes an index of the initial adhesive force, and the adhesive force after 30 minutes becomes an index of the adhesive force to the object to be stuck. Therefore, as shown in Table 1 and FIG. 4, when 0.2% by weight of the polyether-modified dimethylpolysiloxane as a surfactant is added, the adhesive strength after 30 minutes is reduced by about 11%, while the adhesive strength immediately after Is about 40% lower. Also, the ball tack has greatly decreased from No. 12 to No. 7. Moreover, there exists a similar tendency also about Examples 2-7. Therefore, it is suggested that the addition of the surfactant greatly reduces the initial adhesive strength while suppressing the decrease in the adhesive strength to the adherend.

  Moreover, even when polyether-modified dimethylpolysiloxane is added in an amount exceeding 5.0% by weight, the decrease in adhesive force immediately after application is slight and the ball tack value is not decreased. On the other hand, the decrease in adhesive strength after 30 minutes is increasing. Therefore, it can be said that the addition amount of the polyether-modified dimethylpolysiloxane is preferably 0.2% by weight or more and 5.0% by weight.

  Next, the pressure-sensitive adhesive was changed to a low-hydroxyl-type pressure-sensitive adhesive.

  The pressure-sensitive adhesive is changed to a low hydroxyl type acrylic emulsion-type pressure-sensitive adhesive, and the polyether-modified dimethylpolysiloxane as the surfactant is changed to one having a higher polarity than that of Example 2 (with a polarity of “high”). Otherwise, a test piece of Example 8 was obtained in the same manner as in Example 2, and the same test as in Example 1 was performed. The results are shown in Table 2.

  The same test as in Example 8 was performed, except that the polyether-modified dimethylpolysiloxane as the surfactant was changed to the same as in Example 1 (with a polarity of “medium”). The results are shown in Table 2.

  The same test as in Example 8 was conducted, except that the polyether-modified dimethylpolysiloxane as the surfactant was changed to one having a lower polarity (with a polarity of “low”) compared to Example 8. The results are shown in Table 2.

[Comparative Example 2]
A test piece of Comparative Example 2 was obtained in the same manner as in Comparative Example 1 except that the pressure-sensitive adhesive was changed to a low hydroxyl type acrylic emulsion pressure-sensitive adhesive, and the same test as in Comparative Example 1 was performed. The results are shown in Table 2.

  From the results of Examples 8 to 9, even if it is a low-hydroxyl type adhesive, the adhesive force immediately after application is suppressed while suppressing a decrease in adhesive force after 30 minutes of application, as in Example 1. I understand. In addition, compared with Example 1 using a highly polar additive, in Examples 8 and 9 using a moderately or low polarity additive, there is less decrease in the adhesive strength immediately after application, and thus the initial It is suggested that the additive having a strong polarity has a greater effect of recommending the adhesive strength.

  Next, the pressure-sensitive adhesive was changed to a highly elastic acrylic emulsion pressure-sensitive adhesive, and the type of the surfactant was changed.

  A test piece was obtained in the same manner as in Example 2, except that the pressure-sensitive adhesive was changed to a high-elasticity acrylic emulsion pressure-sensitive adhesive and the surfactant was changed to the one of polarity “low” used in Example 10. The same test as 1 was conducted. The results are shown in Table 3.

  A test was conducted in the same manner as in Example 11 except that the surfactant was changed to one having the polarity “medium” used in Example 1. The results are shown in Table 3.

  A test was conducted in the same manner as in Example 11 except that the surfactant was changed to polyether ester-modified hydroxyl group-containing dimethylpolysiloxane and the addition amount was 2.0% by weight. The results are shown in Table 3.

  A test was conducted in the same manner as in Example 11 except that the surfactant was changed to a hydroxyl group-containing polyether-modified dimethylpolysiloxane and the addition amount was 2.0% by weight. The results are shown in Table 3.

[Comparative Example 3]
A test piece of Comparative Example 3 was obtained in the same manner as in Comparative Example 1 except that the pressure-sensitive adhesive was changed to a highly elastic acrylic emulsion pressure-sensitive adhesive, and the same test as in Comparative Example 1 was performed. The results are shown in Table 3.

  In the measurement of the adhesive strength of Comparative Example 3 and the measurement of the adhesive strength after 30 minutes of Examples 11 to 13, a phenomenon called zipping in which the test piece did not peel smoothly from the test polywrap occurred. When zipping occurs, peaks and troughs of adhesive force are repeatedly generated like saw eyes. Therefore, for example, in Example 11, as in 240-355, the average of the adhesive valleys is described before “-”, and the average of the adhesive peaks is also described behind.

  Although it is difficult to make a simple comparison because of zipping, when Comparative Example 3 and Examples 10 to 13 are compared, in any Example, the adhesive force immediately after pasting is lower than the adhesive force after 30 minutes. The decline of is suppressed. That is, the same effect was confirmed even when the pressure-sensitive adhesive was changed to a highly elastic acrylic emulsion pressure-sensitive adhesive. The same effect was confirmed even when the surfactant was a polyether ester-modified hydroxyl group-containing dimethyl polysiloxane or a hydroxyl group-containing polyether modified dimethyl polysiloxane.

DESCRIPTION OF SYMBOLS 10 ... Release layer 20 ... Base material layer 30 ... Adhesive layer 31 ... Interface 40 ... Surfactant 41 ... Hydrophilic end 42 ... Hydrophobic end 50 ... Perforation

Claims (5)

A label continuum which is a laminate having a base material layer and an adhesive layer formed of an adhesive on the lower layer side of the base material layer,
A label continuum in which a surfactant is contained in the adhesive layer.   The label continuum according to claim 1, wherein the surfactant is a silicon-based surfactant.   The label continuum according to claim 1 or 2, wherein the content of the surfactant is 0.2 wt% or more and 5 wt% or less.   The label continuum according to any one of claims 1 to 3, wherein the uppermost layer has a release layer having releasability with respect to the adhesive.   It further has a release paper provided with a release surface having releasability to the adhesive, and the release paper is laminated on the lower layer side of the adhesive layer so that the release surface is in contact with the adhesive layer. 5. The label continuum according to any one of 4 above.