KR20150119625A - Label sheet - Google Patents

Abstract

A label sheet according to an embodiment of the present invention includes a release paper layer, an adhesive layer applied on the upper part of the release paper layer, and an display layer applied on the upper part of the adhesive layer. The adhesive layer includes hydrophilic silica.

Description

Label Sheet {LABEL SHEET}

The present invention relates to a label sheet, and more particularly, to a label sheet used by being attached to a transportation route or the like.

As one of the prominent shopping patterns in the present life pattern, easy and convenient shopping through the same method as Internet order is widely used. In this process, label sheets are attached on the surface of the product packaging to identify and deliver the ordered items so that the user can confirm various delivery related information such as the sender, the recipient's delivery number, and the delivery date at a glance.

Currently, label sheets attached to products used for convenient shipping and delivery information are playing a larger role than the general public perceives. A typical courier label sheet is made up of thermal paper on which the packaging paper, the contents of the order, and the delivery information of the product are printed. The thermal paper and the paper are attached to each other with an adhesive. However, the thermal paper should be peeled off from the lapping paper at the time of shipment, and a UV coating layer is formed on the top of the lapping paper by a UV curing process so that peeling can be easily performed.

1 is a cross-sectional view of a conventional sticker label sheet.

As shown in FIG. 1, the sticky label sheet is composed of four layers as a whole, and a complex process is performed to form four layers. The surface of the rasping paper is coated with a UV coating liquid, irradiated with ultraviolet rays to be cured, and after the adhesive is applied again, the thermal paper is attached to the paper.

The product delivery information is printed on the thermal paper, and information necessary for the delivery is also printed on the paper. Such printing can be performed by using an ordinary printing technique, and is printed using an offset method, a gravure method, or a Furex printing method.

Generally, the manufacture of the sticker label sheet is accomplished by operating the equipment provided for mass production. The production process of the sticky label sheet which requires mass production is shortened and the process time is shortened for manufacturing one label sheet.

However, the reality is that most of the sticker label sheets used in most of the countries are imported pulp products, which account for more than half of the total sticker labels. In the process for producing sticker label sheets, the UV coating process It takes up more than 2/3 of the cost of the entire manufacturing process and requires a considerable amount of time compared to the entire process because the process time must be subjected to a curing step by UV irradiation.

Prior art Patent Application No. 10-2012-0005895 discloses a double label sheet in which silicone is coated on a release layer and a resin coating layer is applied on the first printing member to easily peel off the second printing area from the first printing member, However, as described above, since a separate coating process is involved, the manufacturing process is complicated and the manufacturing cost is also rising.

The label sheet of the present invention has been developed in order to solve the above problems, and it is an object of the present invention to provide a label sheet having the same effect as that of the prior art while simplifying the manufacturing process and reducing the cost and manufacturing time required by the manufacturing process .

Another object of the present invention is to provide a label sheet in which the manufacturing cost is realized by using various kinds of paper without using expensive raw materials.

A label sheet according to an embodiment of the present invention comprises a release layer, an adhesive layer applied on top of the release layer, and a label layer applied on top of the adhesive layer, wherein the adhesive layer comprises hydrophilic silica.

Here, the silica may be 0.5 to 1% by weight, and preferably 0.65 to 0.85% by weight.

The silica may also have a particle size of 10-25 nm.

The adhesive layer may include an acrylic resin and a natural resin as the adhesive resin, the acrylic resin may be 40 to 55 wt%, and the natural resin may be 20 to 33 wt%.

The adhesive layer may contain ethanol and ion-exchanged water as a solvent, 7 to 20% by weight of ethanol, and 5 to 15% by weight of ion-exchanged water.

Further, the natural resin may contain collagen, and the adhesive layer may further contain 0.1 to 1% by weight of defoaming agent.

Here, the release layer may be its lashing or imitation.

According to the label sheet according to an embodiment of the present invention, the manufacturing process is simplified, the production cost is reduced, and the time required for the manufacturing process is reduced, thereby improving the productivity.

In addition, the selection range of raw materials to be used can be widened, so that the manufacturing cost can be reduced. Nevertheless, an inexpensive label sheet which is not different from the conventional label sheet can be provided.

1 is a cross-sectional view of a conventional sticker label sheet.
2 is a cross-sectional view of a label sheet according to an embodiment of the present invention.
3 is an enlarged cross-sectional view of an adhesive layer of a label sheet according to an embodiment of the present invention.
4 is a graph showing the adhesive force according to displacement.
5 is a graph showing the bond strength according to the silica component ratio.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and particular embodiments are illustrated in the drawings and described in detail in the detailed description. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention. In describing the present invention, Detailed explanations of the detailed description will be omitted if it is determined that the gist of the present invention may be blurred.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited or limited by the following examples.

2 is a cross-sectional view of a label sheet according to an embodiment of the present invention.

2, a label sheet according to an exemplary embodiment of the present invention includes a release layer 100, an adhesive layer 200 applied on the adhesive layer 200, and a label layer (not shown) 300, wherein the adhesive layer 200 comprises hydrophilic silica.

The release layer 100 constitutes a lower layer of the label sheet, and an adhesive member (not shown) for attaching to a delivery box or the like may be formed on the lower surface of the release layer 100. (Not shown) or the like formed on the lower surface of the release paper layer 100 is removed and then attached to the delivery box using an adhesive member, thereby eliminating the risk of loss of the label sheet during transportation. The release layer 100 may be, but is not necessarily limited to, its lashing or imitation.

The adhesive layer 200 comprises hydrophilic silica, and the silica may be from 0.5 to 1% by weight, and preferably from 0.65 to 0.85% by weight. In particular, the adhesive layer 200 may include an acrylic resin and a natural resin as the adhesive resin, the acrylic resin may be 40 to 55 wt%, and the natural resin may be 20 to 33 wt%.

The hydrophilic silica contained in the adhesive layer 200 exists in the form of particles and has a network structure mainly composed of siloxane (Si-O-Si) bonds and contains many silanol (Si-OH) groups on its surface.

The adhesive layer 200 may be formed by using ion exchange water (diwater), ethanol or methyl ethyl ketone, methyl isobutyl ketone, dimethyl ketone, isopropyl alcohol, Isobutyl alcohol, normal butyl alcohol, ethyl acetate, normal butyl acetate, ethyl cellusolve, and butyl cellusolve. And may be one or more selected compounds. The solvent may be 12 to 35% by weight of the entire content of the adhesive layer 200, 7 to 20% by weight of ethanol, and 5 to 15% by weight of ion-exchanged water.

The solvent of the adhesive layer 200 affects the drying and the fluidity of the adhesive, and in particular, determines the degree of viscosity of the adhesive layer 200. Also, as a solvent, ethanol is rapidly volatilized into the air when the label layer 100 of the label sheet is separated and separated from the release layer 300, so that no sticky tack remains.

The acrylic resin may be an acrylate monomer or an acrylate oligomer.

As the acrylate monomer, various photo-curable acrylate monomers can be used. For example, 1,2-ethylene glycol diacrylate, 1,12-dodecanediol acrylate, 1,4-butanediol di Acrylate, neopentyl glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, neopentylglycol adipate di (meth) acrylate, Acrylate, hydroxyl puivalic acid neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, caprolactone modified dicyclopentenyl di (meth) acrylate, ethylene (Meth) acrylate, di (meth) acryloxyethyl isocyanurate, allyl cyclohexyl di (meth) acrylate, tricyclodecane dimethanol Acrylate, trimethylolpropane di (meth) acrylate, trimethylolpropane di (meth) acrylate, dimethylol dicyclopentanedi (meth) acrylate, ethylene oxide modified hexahydrophthalic acid di Bifunctional acrylates such as adamantane di (meth) acrylate or 9,9-bis [4- (2-acryloyloxyethoxy) phenyl] fluorine; (Meth) acrylates such as trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri Trifunctional acrylates such as modified trimethylolpropane tri (meth) acrylate, trifunctional urethane (meth) acrylate or tris (meth) acryloxyethylisocyanurate; Tetrafunctional acrylates such as diglycerin tetra (meth) acrylate or pentaerythritol tetra (meth) acrylate; Pentafunctional acrylates such as propionic acid-modified dipentaerythritol penta (meth) acrylate; And dipentaerythritol hexa (meth) acrylate, caprolactone-modified dipentaerythritol hexa (meth) acrylate or urethane (meth) acrylate (e.g., an isocyanate monomer and trimethylolpropane tri Hexafunctional acrylates such as a reaction product, but are not limited thereto.

As the acrylate oligomer, various urethane acrylate oligomers, epoxy acrylate oligomers, ester acrylate oligomers, and catadiene acrylate oligomers that can be photo-curable can be used.

The urethane acrylate oligomer is formed by polymerization of an isocyanate monomer with a polyol. The isocyanate compound includes at least one or more selected from an aliphatic isocyanate compound, an aromatic isocyanate compound, and a combination thereof. ) Acrylic acid hydroxyalkyl ester compound.

The epoxy acrylate may include at least one or more selected from the group consisting of bisphenol A diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, (meth) acrylic acid adduct of phenol novolac epoxy resin, and combinations thereof.

The ester acrylate may include a polyfunctional polyester acrylate compound of a polyhydric alcohol.

Cadillac acrylate may be a compound to which photocurable acrylate is added by reacting at least one selected from the group consisting of a catadiene compound, a dianhydride compound, a diol compound, a diacrylic acid, and a combination thereof.

The acrylic resin serves as a main material constituting an adhesive as a material which provides an adhesive force to the adhesive layer 200.

The natural resin includes collagen, and the adhesive layer 200 may further include 0.1 to 1% by weight of defoamer. Collagen is a triple helical structure in which three polypeptide chains are twisted, especially a protein with a high content of hydroplolin. The amino acid sequences of the collagen are glycine-proline-X or glycine-X-hydroxyproline (X is an amino acid), and the amino acids that are the main constituents are glycine, hydroxyproline, proline and the like. Collagen controls the adhesive strength of acrylic resin. The antifoaming agent suppresses the generation of bubbles in the adhesive layer 200, thereby eliminating adhesion voids due to bubbles.

To summarize, the adhesive layer 200 includes an acrylic resin and a natural resin as resins, and includes a solvent and an antifoaming agent as a solvent and an additive.

3 is an enlarged cross-sectional view of an adhesive layer of a label sheet according to an embodiment of the present invention.

As shown in FIG. 3, the hydrophilic silica particles are dispersed in the adhesive layer 200 and remain in the adhesive layer 200 without being bonded to the hydrophobic acrylic resin due to the nature of the hydrophilic silica. The adhesive layer 200 can easily peel off the label layer 300 from the release layer 100 by the hydrophilic silica even when the peeling is started, even if the UV coating layer is not provided. In particular, the hydrophilic silica included in the label sheet according to an embodiment of the present invention may have a particle size of 10 to 25 nm and a specific surface area (BET) of 110 to 20 m ² / g.

Referring to FIGS. 2 and 3, as the hydrophilic silica particles are dispersed in the adhesive layer, the role of the silica particles to easily peel off the label layer 300 from the release layer 100, as in the case where the UV coating layer is provided I will look at it.

When the adhesive layer 200 is attached through the adhesive layer 200 positioned between the release layer 100 and the label layer 300 in order to produce a label sheet according to an embodiment of the present invention, . When the adhesive layer 200 is applied on the release layer 100, a part of the hydrophobic acrylic resin, which is a main component of the adhesive layer 200, is absorbed on the surface of the release layer 100. The silica particles absorb moisture contained in the hydrophobic acrylic resin absorbed on the surface of the release layer 100 to prevent the absorption of the hydrophobic acrylic resin on the surface of the release layer 100, So that a stable state is obtained in which absorption is not further advanced after the hydrophobic acrylic resin is absorbed. Specific data on the action of the silica particles in the adhesive layer 200 will be described with reference to the following experimental examples and comparative examples.

The label layer 300 may have a perforated line formed in a part thereof and may be separated into at least two areas. The label layer 300 is not limited to paper which can be used as a paper material, but may be an art paper (90 g / m 2) or a thermal transfer paper which is excellent in gloss, smoothness, whiteness and ink repellency and is capable of printing with clear and beautiful prints. The perforated line can be formed by a known sewing process and can be formed in any area of the label layer so that the label layer can be divided into a recovery label layer and a receiver label layer. Contents related to the delivery information and the like may be printed on the upper side of the cover layer.

As described above, the label sheet according to an embodiment of the present invention includes the adhesive layer 200 including hydrophobic acrylic resin and hydrophilic silica. Such a label sheet can maintain the adhesive strength of the label layer 300 and the release layer 100 of the label sheet without any risk of deformation even when the UV coating layer is not provided as in the prior art, 300 can be peeled off without deformation or tearing of the label layer 300.

Hereinafter, the adhesive strength of each layer included in the label sheet according to one embodiment of the present invention and the remaining tack, which is the degree of tackiness at the time of peeling, will be examined through examples and comparative examples.

<Experimental Example>

The label sheet of the present invention was prepared by using a laminating paper as a releasing layer, a thermal transfer paper as a cover layer, a Furex printing method, and anarox 150 to 180 when forming an adhesive layer. The composition of the adhesive layer is 55 wt% of acrylic resin, 27 wt% of natural resin (collagen), 10 wt% of ion exchanged water (diwater), 7 wt% of ethanol, 0.3 wt% of antifoaming agent and 0.7 wt% of silica. The particle size of silica is 16 nm and the specific surface area of silica is 110 20 m ² / g. In addition, Peel Off Test was performed at 25 ° C in this experimental example.

The angle between the marking layer and the release layer in progress is 90 [deg.]. Measure the applied load while separating the flexible cover layer (thermal transfer paper) of constant width at a constant speed, and then divide the measured load by the width of the strip and convert it into peel strength.

<Comparative Example>

As a conventional technology, a label sheet was prepared by using a lapping paper as a releasing layer and a thermal transfer paper as a labeling layer, and was manufactured by Furex printing method in the same manner as in Experimental Example. A UV coating solution is applied over the entire upper surface of the ragging paper and UV treatment is performed to form a UV coating layer. The composition of the adhesive layer is 55 wt% of acrylic resin, 27 wt% of natural resin (collagen), 10 wt% of ion exchanged water (diwater), 7.7 wt% of ethanol and 0.3 wt% of antifoaming agent. Peel off test was performed at 25 캜 as in the experimental example.

4 is a graph showing the adhesive force according to displacement.

As shown in FIG. 4, in the graph data 1 obtained through the experimental example, the adhesive strength increases linearly up to a predetermined displacement, but peeling begins at a specific critical displacement (about 55 μm), and peeling is proceeded with a certain force. Also, the graph data (2) obtained through the comparative example also began to peel at a critical displacement (about 50 탆) and exerted a constant force to peel off. When comparing the above graph data (1, 2), it can be seen that the data according to the experimental example in which silica is added to the adhesive layer as in the present invention and the data according to the comparative example in the case where the conventional coating, . That is, even if a label sheet is prepared by adding silica to the adhesive layer without forming a UV coating layer, it can be confirmed that the same effect as that of the label sheet used as the prior art can be obtained.

division Experimental Example Comparative Example Bond strength 0.21 Kg / cm 2 0.20 Kg / cm 2 Tack (degree of tackiness after peeling) none none Solid content (%) 41 39

Using the data in Table 1, it can be seen that a label sheet (with the present invention) with an adhesive layer comprising silica results in almost similar results as a result of bonding strength, tack, and solid content measurement with a label sheet (prior art) comprising a UV layer .

5 is a graph showing the bond strength according to the silica component ratio.

As shown in FIG. 5, when the weight ratio (wt.%) Of silica in the adhesive layer is 0.5 to 1.0, it has a predetermined bonding strength between the release layer and the label layer, and has a strength advantageous in peeling between the release layer and the label layer. Herein, the strength advantageous for peeling is obtained by grasping a part of the label layer for peeling, and even if an external force is applied, the curl of the label layer due to the deformation of the label layer, and the strength at which the label layer can be peeled it means.

That is, in order to prevent the deformation of the label layer, which may occur when the label layer is peeled off from the label layer, a UV coating layer is formed on the top of the release layer. However, the label layer of the label sheet according to the present invention can be confirmed by the above- Even if a separate UV coating layer is not formed on the release layer, it is possible to remove the release layer from the release layer without causing deformation of the label layer.

In addition, since it is not necessary to perform the UV coating process, it is possible to replace the release layer, which was conventionally used for the lasing paper, with a comparatively inexpensive replica.

However, as can be seen from FIG. 5, when the weight ratio (wt%) of silica in the adhesive layer is 1.0 wt% or more, it can be confirmed that the bond strength between the release layer and the label layer is drastically reduced. The silica in the adhesive layer is weakly bonded to the hydrophobic acrylic resin which is the main component of the adhesive layer. When the weight ratio of silica is increased, the adhesive force is remarkably decreased. The release layer and the label layer can easily peel off even with weak external force.

The weight ratio of silica in the adhesive layer is preferably 0.65 wt% to 0.85 wt%, wherein the particle size of the silica is 16 nm and the specific surface area of silica is preferably 110 20 m ² / g. Through the silica having such a weight ratio, particle size, and specific surface area, the adhesive layer has adhesive strength similar to that of a label sheet having a conventional UV coating layer.

As a result, according to the present invention, there is no difference in performance between the label sheet having the conventional UV coating layer and the UV coating process in the process of producing the label sheet according to the present invention, There is no need to be tough and productivity is improved, and a label sheet capable of reducing process unit cost and manufacturing cost is provided.

100 cover layer
200 adhesive layer
300 heterogeneous strata

Claims (8)

A release layer;
An adhesive layer applied over the release layer; And
A label sheet comprising a label layer applied to an upper portion of the adhesive layer,
Wherein the adhesive layer comprises hydrophilic silica. The method according to claim 1,
Wherein the silica is present in an amount of 0.5 to 1% by weight. 3. The method of claim 2,
Wherein the silica is contained in an amount of 0.65 to 0.85% by weight. 3. The method of claim 2,
Wherein the silica has a particle size of 10 to 25 nm. The method according to claim 2 or 3,
Wherein the adhesive layer comprises an acrylic resin and a natural resin as adhesive resins, the acrylic resin is 40 to 55 wt%, and the natural resin is 20 to 33 wt%. 6. The method of claim 5,
Wherein the adhesive layer comprises ethanol and ion-exchanged water as a solvent, wherein the ethanol comprises 7 to 20 wt% and the ion-exchanged water contains 5 to 15 wt%. 6. The method of claim 5,
Wherein the natural resin comprises collagen, and the adhesive layer further comprises from 0.1 to 1% by weight of a defoaming agent. The method according to claim 1,
Wherein the release layer is a lashing paper or an imitation paper.

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