KR102491372B1 - Repositionable linerless thermosensitive label - Google Patents

Abstract

The present invention relates to a reposable linerless thermal label, and relates to a linerless label sheet that significantly prevents paper from curling due to thermal printing. According to the present invention, it is possible to output linerless label paper and re-adhesion to suit the purpose, and it is possible to prevent curling of the paper according to the output, thereby doubling the convenience of use.

Description

Repositionable linerless thermosensitive label to prevent curling {Repositionable linerless thermosensitive label}

The present invention relates to a reposable linerless thermal label, and relates to a linerless label sheet that significantly prevents paper from curling due to thermal printing.

Printing technology using thermal paper is usefully utilized in a variety of ways in our daily lives in terms of storage and confirmation of information such as receipts and order details.

However, when the thermal paper passes through the printer, it is exposed to a high temperature and the paper is curled by heat, or the thermal paper rolled in a roll form remains inconvenient even after printing.

There are coating technologies for preventing curling of thermal paper, but there are limitations on selection depending on cost or suitability for printing.

In addition, there is a case where it is necessary to attach thermally printed contents as needed, but a product capable of appropriately responding technically has not been developed.

Korea Patent Publication No. 2000-0022073

The present invention provides roll or folded stack linerless label paper to enable continuous printing.

In addition, the present invention provides linerless label paper having an adhesive layer formed on the back side to enable repositioning.

In addition, the present invention provides linerless label paper having a specific adhesive layer pattern to prevent paper from curling.

According to one aspect of the present invention, a roll or folding type reposable linerless label paper having an adhesive layer pattern in the form of a band, a figure, or a combination thereof is provided on the back side.

According to the present invention, it is possible to output linerless label paper and re-adhesion to suit the purpose, and it is possible to prevent curling of the paper according to the output, thereby doubling the convenience of use.

1 to 10 show patterns of the adhesive layer formed on the back side of linerless label paper according to the present invention.

Hereinafter, the present invention will be described in more detail.

The present invention provides linerless label paper capable of printing.

The present invention provides linerless label paper capable of repositioning.

The present invention provides linerless label paper having an adhesive layer pattern that prevents paper from curling.

The printing may be performed by a thermal printing method using thermal paper.

The present invention provides label paper capable of repositioning through re-adhesion of printed matter while preventing curling of thermal paper. To this end, an adhesive pattern having a shape as shown in the accompanying drawings is provided.

1. Patterning of the adhesive layer

The present invention provides an adhesive layer on the back side of the thermal paper so that the paper output through the printer can be adhered to a desired place by the end user, and includes repositionable paper.

The pattern of the present invention is as shown in the drawing below, and the functional characteristics of the pattern are as follows.

In the pattern of FIG. 1, an adhesive layer is added to one side of the left or right side of the printed paper. The adhesive layer applied to one side can apply tension to the thermal paper so that deformation due to printing can be minimized. This pattern has the advantage of minimizing the amount of adhesive used by applying the adhesive layer to only one side, and since it is formed along the side, it can be adhered wherever the paper is cut.

In the pattern of FIG. 2, adhesive layers are formed on both the left and right sides of the output paper. Such a pattern has the advantage of being more effective in preventing curling of paper compared to the pattern of FIG. 1 .

In the pattern of FIG. 3 , an adhesive portion in the form of a stripe is formed in a direction in which paper is output. Such a pattern has the advantage of being able to be adhered to the entire surface and preventing the curling of the paper more effectively.

The pattern of FIG. 4 is formed by forming an adhesive portion in the form of a stripe in a direction perpendicular to the direction in which the paper is output, and has the advantage of facilitating the adhesion of Indica printed horizontally on the paper.

The pattern of FIG. 5 has a disadvantage in that a rather large amount of adhesive is used, but is advantageous in that it is excellent in preventing curling of paper and can maintain strong adhesive strength.

The pattern of FIG. 6 has the advantage of providing a structural motif in which the vertical and horizontal directions of the paper output direction are connected, thereby maximally preventing the curling of the paper and maintaining strong adhesive force through the adhesive portion formed in the horizontal and vertical directions. . The adhesive part in the horizontal direction formed perpendicular to the output direction can be formed correspondingly when there is a cutting line, such as in the form of a fold, and in the case of continuous paper (roll) without a cutting line, it is formed at necessary intervals. can be used by

The pattern of FIG. 7 is provided with an X-shaped adhesive portion to prevent the paper from curling as much as possible, and is composed of a pattern that can evenly distribute the force to bend the paper to the left and right edges by acting in the output direction of the paper. .

8 also has an 'O'-shaped adhesive portion to prevent paper from curling as much as possible, and is composed of a pattern that can evenly distribute the force to bend the paper to the left and right edges by acting in the output direction of the paper. .

FIG. 9 borrows the characteristics of the patterns of FIGS. 7 and 8 and has a rhombus-shaped adhesive portion, which acts in the output direction of the paper to evenly distribute the force to bend the paper to the left and right periphery, while also distributing the upper and lower sides of the rhombus present in the center. The corner is composed of a pattern that can prevent the paper from curling.

10 shows the adhesive portion of the honeycomb pattern. In the case of thermal paper, there may be a force to maintain the shape of the rolled paper and a tendency to bend toward the back side by heating during printing. This can be mitigated when a functional element capable of resisting this is introduced.

2. Adhesive composition

The present invention provides an adhesive composition capable of preventing curling of thermal paper due to heating and the shape of the roll paper.

As described above, the thermal paper rolled into a roll and supplied to a printer has a property of maintaining its original curved shape. And, there is a factor (for example, the principle of bimetal) that can maintain or further strengthen the bent shape in the printing process by heating. The curling phenomenon of the paper can be more alleviated by configuring an appropriate pressure-sensitive adhesive composition for such a curling phenomenon.

2-1. Utilization of difference in volume expansion of laminated structure

First, a volume expander whose volume increases by heating is added to the pressure-sensitive adhesive composition by using an environment in which heat cannot be applied due to the nature of the thermal paper. An increase in the volume of the adhesive can provide an opposing force against the curling of the paper. However, if the volume expansion rate is too large, the paper may be reversed or the adhesive performance may deteriorate. Therefore, it is sufficient to provide a pushing force sufficient to keep the paper flat. There is no particular limitation on the type of such a volume expander, and it is preferable that it can be well compatible with rubber-based, hot-melt-based, acrylic-based, and silicone-based adhesives, which are common types of adhesives.

Second, a layered structure of various papers can be utilized to prevent paper from curling. A layer of material with a different expansion coefficient than the paper may be introduced on one or both sides of the front or back side of the paper. In addition, layers of materials having different coefficients of expansion may be respectively introduced on the front and back surfaces of the paper.

The coefficient of expansion may be due to heat, may be a characteristic for moisture or other substances, and a force acting in the opposite direction to the curl of the paper due to thermal printing may be imparted by introducing different layers.

As an example of such a laminated structure, a fibrous pigment may be applied to the paper surface. The fibrous pigment can give a rough feel to the surface of the paper to improve the writing feeling or the characteristics of the printed result.

2-2. Utilization of solidifying agent

In the case of 'adhesion', which is generally distinguished from 'adhesion', the so-called cohesive failure mode in which the adhesive remains on the adherend on both sides when the adhesive state at the interface is peeled off is a preferable mode. Therefore, the thinner the adhesive layer, the stronger it is, and when it is thick, stress concentration occurs in defective areas such as voids, resulting in a decrease in adhesive strength. .Kim Hyun-joong and others)

In the case of an adhesive, there is a different aspect from the adhesive as described above.

That is, since cohesive failure does not occur during the peeling of the adhesive and the adhesive is not left on the adherend, it is ideal that the adhesive strength of the interface is inevitably relatively weak. Therefore, it is desirable to make it flexible and thick so that the peeling stress is dispersed in the pressure-sensitive adhesive layer. In addition, the thicker the pressure-sensitive adhesive layer, the stronger the adhesive force. In addition, since adhesives must exhibit practically enduring adhesiveness (initial tack) immediately after sticking, adhesives have two opposite properties: the property of a liquid to wet the adherend (fluidity) and the property of a solid to resist peeling (cohesion). this is required ("Chemistry and Applications of Adhesion and Adhesion". 2002, Korean Society of Adhesion and Interface. Hyunjoong Kim et al.)

There are types of adhesives such as rubber-based, hot-melt-based, acrylic-based, and silicone-based adhesives. As the adhesive to be used in the present invention, first, an acrylic adhesive having relatively high hardness may be mentioned.

The acrylic type is a copolymer in which various acrylates and methacrylates are combined, and can be made by liquid polymerization, but is preferably made by emulsion polymerization. Sometimes it is used without adding a tackifier, but there are many cases where a tackifier is mixed for the purpose of imparting special performance or attaching to a highly polar adhered surface. composition can be made.

3. Other

In order to prevent the curling of the paper, a roll may be manufactured by rolling the paper in a direction that alleviates the curling of the thermal paper. That is, the thermal paper roll is manufactured so that the direction in which the paper is rolled by printing by heating and the direction in which the paper is rolled by rolling are opposite to each other.

In addition, devices for preventing curling of the thermal paper may be introduced into the printing device. Regarding this, various patents (Korean Registered Patent No. 10-1047066 Photo Printer with Printing Paper Decurl Device, Korean Utility Model No. 20-0138471 Facsimile Thermal Recording Paper Curl Prevention Device, Korean Utility Model No. 20-0156000 Facsimile Roll Type Paper Bending Prevention Device , Korean Utility Model Patent No. 1994-0002111 roll recording paper antical ringing device, etc.) have been applied for.

Hereinafter, the present invention will be described in more detail through examples. However, these examples are only intended to illustrate the present invention, and the scope of the present invention will not be construed as being limited by these examples.

[Comparative Example 1]

Printing was performed on 7.7 mm wide thermal paper (Sindorico Co., Ltd.). The printed result was warped due to the shape of the roll and the heat generated during printing.

[Comparative Example 2]

Printing was performed on thermal paper (Sindorico Co., Ltd.) with a width of 5.2 mm. The printed result was warped due to the shape of the roll and the heat generated during printing.

[Example 1] to [Example 9]

An adhesive layer having a width of 1.2 mm and having a pattern as shown in FIGS. 1 to 9 was formed using a hot-melt type (Henkel) adhesive on the back side of a 7.7 mm wide thermal paper roll (Syndorico Co., Ltd.). Compared to the comparative example, the printed result showed less bending of the paper and was smoothly attached and reattached to the desired place.

[Example 10] to [Example 18]

An adhesive layer having a width of 1.2 mm and having a pattern as shown in FIGS. 1 to 9 was formed using a hot-melt type (Henkel) adhesive on the back side of a 5.2 mm wide thermal paper roll (Syndorico Co., Ltd.). Compared to the comparative example, the printed result showed less bending of the paper and was smoothly attached and reattached to the desired place.

[Example 19]

A 5.2 mm wide thermal paper roll (Syndorico Co., Ltd.) was rolled upside down, and an adhesive layer having a width of 1.2 mm and a pattern as shown in FIGS. Compared to the comparative example, the printed result showed less bending of the paper and was smoothly attached and reattached to the desired place.

As described above, specific parts of the present invention have been described in detail, to those skilled in the art, it is clear that these specific descriptions are only preferred embodiments, and the scope of the present invention is not limited thereby. something to do. Accordingly, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

Claims (2)

A repositionable linerless thermal label made of a roll type, comprising:
thermal paper; and
An adhesive layer formed on one surface of the thermal paper,
The adhesive layer applies tension to the thermal paper to minimize deformation of the thermal paper due to printing,
The positionable linerless thermal label of claim 1 , wherein the adhesive layer has a band-shaped pattern formed along the length direction of the thermal paper, excluding both ends in the width direction of the thermal paper.
According to claim 1,
A positionable linerless thermal label, wherein a layer having a coefficient of thermal expansion different from that of the adhesive layer is formed on the other surface of the thermal paper to apply a force acting in a direction opposite to a direction in which the thermal paper is rolled according to printing along with the adhesive layer.

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