Pseudo adhesive labels

Abstract

To provide a pseudo adhesive label which offers superior tearability of a pseudo adhesive layer thereof after being separated from a base material, while maintaining separability between the base material and the pseudo adhesive layer.SOLUTION: A pseudo adhesive label 1 comprises a base material 10, an adhesive layer 30, and a pseudo adhesive layer 20 sandwiched between the base material 10 and the adhesive layer 30, the pseudo adhesive layer 20 comprising a polyolefin-based resin and a filler.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to pseudo-adhesive labels. [Background technology]

[0002] A pseudo-adhesive label is a label that can be easily peeled off from the substrate starting from the pseudo-adhesive interface after being attached to an adherend. Pseudo-adhesive labels have been put to practical use, for example, as delivery slips or information concealing labels.

[0003] For example, Patent Document 1 describes a pseudo-adhesive label having a substrate, a pseudo-adhesive layer containing a thermoplastic resin having a crystallinity of 22.5% or less, and an adhesive layer containing a tackifier resin, in which the pseudo-adhesive strength of the pseudo-adhesive layer to the substrate is within a predetermined range. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-160308 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, when using a pseudo-adhesive label as a delivery slip or the like, the pseudo-adhesive label may be affixed on top of packaging tape or the like that has been applied to fix packaging materials. In such a case, when the package is unpacked, the base material of the pseudo-adhesive label is peeled off, and the pseudo-adhesive layer remains on the packaging tape or the like. However, in the past, when attempting to peel off the packaging tape or the like to unpack the package, there was a problem that the packaging tape or the like could not be peeled off cleanly because the packaging tape or the like would get caught on the part that overlaps with the pseudo-adhesive label due to the resistance to tearing (tear-resistance) of the pseudo-adhesive layer.

[0006] An object of the present invention is to provide a pseudo-adhesive label which maintains the peelability between the substrate and the pseudo-adhesive layer, while providing excellent tearability of the pseudo-adhesive layer after the substrate is peeled off. [Means for solving the problem]

[0007] According to one aspect of the present invention, a pseudo-adhesive label is provided having a substrate, an adhesive layer, and a pseudo-adhesive layer contained between the substrate and the adhesive layer, the pseudo-adhesive layer containing a polyolefin resin and a filler.

[0008] In the pseudo-adhesive label according to one aspect of the present invention, the polyolefin resin preferably contains polyethylene as a main component.

[0009] In the pseudo-adhesive label according to one aspect of the present invention, the filler preferably has an average particle size of 0.5 μm or more and 20 μm or less.

[0010] In the pseudo-adhesive label according to one embodiment of the present invention, the proportion of the filler added to the total volume of the polyolefin resin in the pseudo-adhesive layer is preferably 1 volume % or more and 40 volume % or less.

[0011] In the pseudo-adhesive label according to one aspect of the present invention, it is preferable that the filler is not surface-treated.

[0012] In the pseudo-adhesive label according to one aspect of the present invention, the substrate is preferably a paper substrate.

[0013] In the pseudo-adhesive label according to one aspect of the present invention, the paper substrate is preferably thermal paper.

[0014] It is preferable that the pseudo-adhesive label according to one aspect of the present invention further comprises a release liner, and the pressure-sensitive adhesive layer is attached to the release liner. Effect of the Invention

[0015] According to one aspect of the present invention, a pseudo-adhesive label can be provided that maintains the peelability between the substrate and the pseudo-adhesive layer, while providing excellent tearability of the pseudo-adhesive layer after the substrate is peeled off. [Brief description of the drawings]

[0016] [Figure 1] 1 is a cross-sectional schematic diagram of a pseudo adhesive label according to one embodiment of the present invention. [Diagram 2] 1 is a schematic cross-sectional view showing a pseudo-adhesive label according to one embodiment of the present invention attached to an adherend. [Diagram 3] 2 is a schematic cross-sectional view illustrating a state in which a substrate is peeled off from a pseudo adhesive label according to one embodiment of the present invention. FIG. [Figure 4] FIG. 2 is a schematic diagram for explaining a method for evaluating tear properties in the examples and comparative examples. [Diagram 5] 3 is a photograph showing the evaluation results of tear properties in Example 1. [Figure 6] 4 is a photograph showing the evaluation results of tear properties in Comparative Example 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The present invention will be described below by taking an embodiment according to one aspect of the present invention as an example. This embodiment is not limited to the above.

[0018] [Embodiment according to one aspect of the present invention] (pseudo adhesive label) The pseudo-adhesive label according to this embodiment includes a substrate, a pressure-sensitive adhesive layer, and a pseudo-adhesive layer included between the substrate and the pressure-sensitive adhesive layer. The pseudo-adhesive layer pseudo-adheres to the substrate. In this specification, "pseudo-adhesion" refers to adhesion in which one layer and another layer are bonded together under specific conditions (e.g., a combination of materials and a temperature range) and can be easily peeled off at the interface, but does not exhibit re-adhesion or re-stickiness after peeling.

[0019] 1 shows a schematic cross-sectional view of a pseudo adhesive label 1 according to this embodiment. In the pseudo adhesive label 1 according to this embodiment, a substrate 10, a pseudo adhesive layer 20, and a pressure-sensitive adhesive layer 30 are laminated in this order. The substrate 10 and the pseudo adhesive layer 20 are pseudo-adhered to each other at an interface A. Moreover, the pseudo-adhesive label 1 according to this embodiment further has a release liner RL, as shown in Fig. 1. The pseudo-adhesive label according to the present invention is not limited to an embodiment having a release liner RL.

[0020] In the pseudo adhesive label 1 according to this embodiment, the pseudo adhesive layer 20 is pseudo-adhered to the substrate 10. That is, the pseudo adhesive label 1 according to this embodiment can be peeled off at the interface A between the substrate 10 as one layer and the pseudo adhesive layer 20 as the other layer, and the interface A side surface of the substrate 10 and the interface A side surface of the pseudo adhesive layer 20 after peeling do not exhibit re-adhesion or re-stickiness.

[0021] There is no particular limitation on the shape of the pseudo adhesive label 1. Examples of the shape of the pseudo adhesive label 1 in plan view include polygons (for example, rectangles and triangles), circles, ellipses, and irregular shapes.

[0022] (pseudo adhesive layer) The pseudo-adhesive layer 20 of the pseudo-adhesive label 1 according to this embodiment contains a polyolefin resin and a filler. By containing the polyolefin resin in the pseudo-adhesive layer 20, the pseudo-adhesive layer 20 can be peeled off between the substrate 10 and the pseudo-adhesive layer 20 without cohesive failure when the substrate 10 is peeled off. In addition, by containing a filler in the pseudo-adhesive layer 20, good tearability can be imparted without significantly affecting the peeling force of the substrate 10. In this specification, "tearability" refers to the ease of tearing the pseudo-adhesive layer.

[0023] Polyolefin resin The polyolefin resin is a polymer having at least a structural unit derived from an olefin monomer. The olefin monomer is preferably an olefin having a carbon number of 2 or more and 8 or less. Examples of the olefin having a carbon number of 2 or more and 8 or less include ethylene, propylene, butylene, isobutylene, and 1-hexene. In one aspect of this embodiment, the olefin monomer is more preferably at least one monomer selected from the group consisting of ethylene, propylene, and butylene, which are olefins having 2 to 4 carbon atoms, even more preferably at least one monomer selected from the group consisting of ethylene and propylene, which are olefins having 2 to 3 carbon atoms, and even more preferably an ethylene monomer, which is an olefin having 2 carbon atoms. The polyolefin resin may be a polymer using one type of olefin monomer alone, or a copolymer using two or more types of olefin monomers in combination.

[0024] Examples of the polyolefin resin contained in the pseudo-adhesive layer 20 include polyethylene resin, polypropylene resin (PP), polybutene resin (PB), ethylene-propylene copolymer, olefin elastomer (TPO), ethylene-vinyl acetate copolymer (EVA), ethylene-methyl methacrylate copolymer (EMMA), and olefin terpolymer. Examples of the olefin terpolymer include ethylene-propylene-(5-ethylidene-2-norbornene).

[0025] The polyolefin resin is preferably at least one resin selected from the group consisting of polyethylene resin, polypropylene resin (PP), and polybutene resin (PB), and more preferably at least one resin selected from the group consisting of polyethylene resin and polypropylene resin (PP). Examples of polyethylene resins include very low density polyethylene (VLDPE, density: 880 kg / m 3 More than 910kg / m 3 less than 910kg / m 3 More than 915kg / m3 less than 915kg / m 3 More than 942kg / m 3 less than 94), High Density Polyethylene (HDPE, density: 94 2kg / m 3 or more), and linear polyethylene.

[0026] In the polyolefin-based resin, the content of structural units derived from an olefin monomer having 2 to 8 carbon atoms is preferably 50% by mass or more and 100% by mass or less, more preferably 60% by mass or more and 100% by mass or less, even more preferably 70% by mass or more and 100% by mass or less, still more preferably 80% by mass or more and 100% by mass or less, and even more preferably 90% by mass or more and 100% by mass or less, relative to the total structural units of the olefin-based resin (100% by mass). The pseudo-adhesive layer 20 may contain one kind of these polyolefin resins alone, or may contain two or more kinds of them.

[0027] When the substrate 10 is a paper substrate, it is preferable that the polyolefin resin contained in the pseudo-adhesive layer 20 contains polyethylene as a main component from the viewpoint of realizing good pseudo-adhesion with the paper substrate and from the viewpoint of easy thermocompression bonding to the paper substrate. In addition, since the polyolefin resin contained in the pseudo-adhesive layer 20 contains polyethylene as a main component, it is possible to adjust the peeling force when peeling off the thermal paper, particularly when the substrate 10 is thermal paper (thermal paper). Furthermore, when the polyolefin resin contained in the pseudo-adhesive layer 20 contains polyethylene as a main component, the tearability is further improved. Incidentally, "containing polyethylene as a main component" means that polyethylene is contained in the largest amount of the polyolefin-based resin contained in the pseudo-adhesive layer 20. In this case, the polyolefin-based resin contained in the pseudo-adhesive layer 20 may be only polyethylene. When the polyolefin resin contained in the pseudo-adhesive layer 20 contains polyethylene as a main component, the content of components other than polyethylene in the polyolefin resin is preferably up to 30% by mass.

[0028] From the viewpoint of improving releasability, the pseudo-adhesive layer preferably contains 50% by mass or more, and more preferably 70% by mass or more, of a polyolefin resin.

[0029] Filler The filler contained in the pseudo-adhesive layer 20 is not particularly limited as long as it does not impair the effects of this embodiment. From the viewpoint of suppressing excessive increase in cohesive force and maintaining good tearability, it is preferable that the filler is not surface-treated with a dispersant such as a silane coupling agent, or with plasma or ozone, etc. Fillers that have not been surface-treated in this manner are preferable because the surface free energy of the filler surface is low, resulting in low affinity with the added resin component.

[0030] Examples of the filler contained in the pseudo-adhesive layer 20 include inorganic fillers and organic fillers. Examples of the inorganic filler include silica, alumina, talc, calcium carbonate, titanium white, red iron oxide, silicon carbide, and boron nitride. Examples of the silica include fused silica and spherical silica. Examples of the organic filler include polystyrene resin, acrylonitrile-butadiene-styrene resin, polymethyl methacrylate resin, silicone resin, and crosslinked products thereof. The pseudo-adhesive layer 20 may contain one type of these fillers alone, or may contain two or more types. From the viewpoint of improving tearability, the filler contained in the pseudo adhesive layer 20 is preferably calcium carbonate.

[0031] The average particle size of the filler is preferably 0.5 μm or more and 20 μm or less. If the average particle size of the filler is 0.5 μm or more, good tearability is easily obtained, and if it is 20 μm or less, the unevenness of the pseudo-adhesive layer 20 is not too large, good film-forming properties are easily obtained, and the effect on the peel force is suppressed. The average particle size in this specification is a volume average particle size calculated from the particle size distribution measurement results of the dielectric filler (B) by a laser diffraction / scattering method in accordance with JIS Z 8819-2:2001.

[0032] The filler content in the pseudo-adhesive layer 20 is preferably 1% by volume or more and 40% by volume or less, more preferably 5% by volume or more and 30% by volume or less, based on the total volume of the polyolefin resin and the filler. If the filler content in the pseudo-adhesive layer 20 is 1% by volume or more, good tearability is obtained, and if it is 40% by volume or less, the effect on film-forming properties and peel strength is suppressed.

[0033] In addition to the polyolefin resin and the filler, the pseudo-adhesion layer 20 may contain resins other than the polyolefin resin and additives as long as the effect of this embodiment is not impaired. Examples of resins other than polyolefin resins include polypolymers that are compatible with polyolefin resins, specifically, styrene elastomers and ester elastomers. When the pseudo-adhesive layer 20 contains a resin other than polyolefin resin, a modification effect of the pseudo-adhesive layer 20 can be obtained. When the pseudo-adhesive layer 20 contains a resin other than a polyolefin-based resin, the content of the resin other than a polyolefin-based resin is preferably 30 mass % or less.

[0034] Examples of the additives include antioxidants, lubricants, ultraviolet absorbers, colorants, and antiblocking agents. When the pseudo-adhesive layer 20 contains an additive, the additive may be one type or two or more types. When the pseudo-adhesive layer 20 contains an additive, the content of the additive is preferably 0.0001 parts by mass or more and 20 parts by mass or less, more preferably 0.0005 parts by mass or more and 15 parts by mass or less, and even more preferably 0.001 parts by mass or more and 10 parts by mass or less, per 100 parts by mass of the polyolefin resin.

[0035] There is no particular limitation on the thickness of the pseudo-adhesive layer 20. The thickness of the pseudo-adhesive layer 20 is preferably 1 μm or more and 50 μm or less, more preferably 3 μm or more and 40 μm or less, even more preferably 5 μm or more and 40 μm or less, even more preferably 7 μm or more and 30 μm or less, and even more preferably 10 μm or more and 25 μm or less.

[0036] (base material) The substrate 10 of the pseudo adhesive label 1 according to this embodiment is not particularly limited. The substrate 10 is appropriately selected from substrates used in conventional pseudo adhesive labels depending on the intended use of the pseudo adhesive label 1. In the pseudo adhesive label 1, the substrate 10 is an information display substrate that displays information about the adherend. For example, when the adherend is a delivery, the information about the adherend may include the sender, destination, and delivery company's name or title, address, telephone number, and contents of the delivery.

[0037] The thickness of the substrate 10 is appropriately selected depending on the application of the pseudo adhesive label 1. From the viewpoint of handleability, the thickness of the substrate 10 is preferably 10 μm or more and 250 μm or less, more preferably 20 μm or more and 200 μm or less, and even more preferably 30 μm or more and 150 μm or less.

[0038] Examples of the substrate 10 include paper, resin film, synthetic paper, and laminated sheets in which two or more layers of these are laminated. Examples of papers that can be used as the substrate 10 include thermal paper, craft paper, fine paper, glassine paper, parchment paper, rayon paper, coated paper, and synthetic fiber paper. Examples of resin films that can be used as the substrate 10 include films of polyester-based resins, polyvinyl chloride-based resins, polyvinylidene chloride-based resins, and polyolefin-based resins.

[0039] The substrate 10 is preferably a paper substrate made of paper or synthetic paper, more preferably thermal paper, kraft paper, fine paper, or glassine paper, and even more preferably thermal paper.

[0040] The paper base material has a basis weight of 10 g / m 2 It is preferable that the weight is 15 g / m or more. 2 It is more preferable that the basis weight of the paper base material is 200 g / m or more. 2 It is preferable that the thickness is less than 150 g / m 2 It is more preferable that the base material 10 is a paper base material having a basis weight in this range. According to the pseudo adhesive label 1 according to this embodiment, even if the base material 10 is a paper base material having a basis weight in this range, breakage of the base material when the base material is peeled off can be suppressed.

[0041] (Adhesive layer) The adhesive layer 30 preferably contains a known adhesive. Examples of the adhesive that is combined with a tackifier resin in the adhesive layer 30 include acrylic adhesives, natural rubber adhesives, synthetic rubber adhesives, and silicone adhesives.

[0042] The thickness of the adhesive layer 30 is appropriately selected depending on the application of the pseudo adhesive label 1. The thickness of the adhesive layer 30 is preferably 1 μm or more and 50 μm or less, more preferably 5 μm or more and 50 μm or less, even more preferably 10 μm or more and 40 μm or less, even more preferably 10 μm or more and 30 μm or less, and even more preferably 10 μm or more and 20 μm or less.

[0043] The adhesive strength of the pseudo-adhesive label 1 according to JIS Z 0237:2009 is preferably 6.0 N / 25 mm or more, and more preferably 8.0 N / 25 mm or more, from the viewpoint of preventing the pseudo-adhesive label 1 from unintentionally peeling off from the adherend.

[0044] (Release liner) The release liner RL protects the adhesive layer 30 until the pseudo adhesive label 1 is attached to an adherend. The release treatment layer can be formed by applying a release agent onto the surface of the release liner substrate.

[0045] Examples of substrates for release liners include papers and plastic films. Examples of the paper include fine paper, glassine paper, and craft paper. Examples of the plastic film include polyester resin film and polyolefin resin film. Examples of the polyester resin film include films of polyethylene terephthalate resin, polybutylene terephthalate resin, and polyethylene naphthalate resin. Examples of the polyolefin resin film include films of polypropylene resin and polyethylene resin. The papers and plastic films used as the substrate for the release liner may be the same as or different from the papers and plastic films exemplified in the description of the substrate 10 of the pseudo-adhesive label 1, for example.

[0046] Examples of the release agent include rubber-based elastomers such as silicone-based resins, olefin-based resins, isoprene-based resins, and butadiene-based resins, long-chain alkyl-based resins, alkyd-based resins, and fluorine-based resins.

[0047] The thickness of the release liner RL is not particularly limited. The thickness of the release liner RL is preferably 10 μm or more and 200 μm or less, more preferably 25 μm or more and 170 μm or less, even more preferably 30 μm or more and 150 μm or less, even more preferably 35 μm or more and 100 μm or less, and even more preferably 35 μm or more and 80 μm or less.

[0048] <Manufacturing method of pseudo adhesive label> The pseudo adhesive label 1 according to this embodiment can be manufactured, for example, by a manufacturing method including the following steps P1 and P2.

[0049] ·Process P1 Step P1 is a step of laminating the substrate 10 and the pseudo-adhesive layer 20. The laminate produced in step P1 in which the interface A between the substrate 10 and the pseudo-adhesive layer 20 is pseudo-adhesive may be referred to as a "pseudo-adhesive laminate" below. ·Process P2 Step P2 is a step of laminating a pressure-sensitive adhesive layer 30 onto the pseudo-adhesive layer 20 of the pseudo-adhesive laminate obtained in step P1.

[0050] First, the process P1 will be described. The method for laminating the pseudo-adhesive layer 20 on the substrate 10 is not particularly limited. The manufacturing method of the pseudo adhesive label 1 according to this embodiment includes a step of melt-extruding a pseudo adhesive layer material containing a material constituting the pseudo adhesive layer 20 onto the substrate 10 (melt extrusion step). In the manufacturing method of the pseudo adhesive label 1 according to this embodiment, the pseudo adhesive layer material contains at least a polyolefin resin and a filler.

[0051] An example of a method for melt-extruding the pseudo-adhesive layer material is a method using a T-die. The temperature (melt extrusion temperature) at which the pseudo-adhesion layer material is melted and extruded is preferably set appropriately depending on the type of resin constituting the pseudo-adhesion layer 20. In addition, the melt extrusion temperature is preferably a temperature at which the pseudo-adhesion layer material does not melt and adhere to the substrate 10. In this embodiment, since at least a polyolefin-based resin is used as the resin constituting the pseudo-adhesive layer 20, the melt extrusion temperature is typically 200°C or higher and 400°C or lower, preferably 230°C or higher and 350°C or lower, and more preferably 250°C or higher and 300°C or lower.

[0052] Step P1 also includes a step of cooling the melt-extruded pseudo-adhesive layer material (cooling step). In the cooling step, the heated and melted pseudo-adhesion layer material is brought into contact with a cooling means such as a cooling roll to form the pseudo-adhesion layer 20. The cooling roll has a cylindrical body with a metal outer circumferential surface. The cooling roll has a cooling function by passing cooling water or the like through the inside of the cylindrical body. When a cooling roll is used as the cooling means, the pseudo-adhesion layer material melt-extruded onto the substrate may be cooled by directly contacting the outer circumferential surface of the cooling roll, or the substrate may be directly contacted with the outer circumferential surface of the cooling roll to indirectly cool the pseudo-adhesion layer material. In addition, in the cooling step, the melt-extruded pseudo-adhesion layer material may be cooled by air cooling. The cooling temperature of the pseudo-adhesive layer 20 is preferably 15° C. or higher and 40° C. or lower, and more preferably 20° C. or higher and 35° C. or lower. When a cooling roll is used as the cooling means, the cooling temperature is the temperature of the cooling water passed through the cooling roll. When the pseudo-adhesive layer material is cooled by air cooling, the cooling temperature is the atmospheric temperature in which the melt-extruded pseudo-adhesive layer material is placed, and when temperature-controlled air is forcibly blown onto the pseudo-adhesive layer material, the cooling temperature is the temperature of that air.

[0053] When a cooling roll is used as a cooling means, the time (cooling time) that the molten pseudo-adhesive layer material is directly or indirectly in contact with the outer peripheral surface of the cooling roll can be controlled by the speed at which the laminate comprising the substrate and the pseudo-adhesive layer material is transported.

[0054] As described above, the pseudo-adhesive laminate can be obtained by the step P1 including the melt-extrusion step and the cooling step.

[0055] Next, the process P2 will be described. In step P2, a pressure-sensitive adhesive layer 30 is formed on the surface of the pseudo-adhesive laminate on the side of the pseudo-adhesive layer 20.

[0056] Specifically, an adhesive composition containing a material for forming the adhesive layer 30 is applied to the release-treated surface of the release liner RL to form the adhesive layer 30 on the release liner RL. The adhesive layer 30 formed on the release liner RL is attached to the surface of the pseudo-adhesive layer 20 side of the pseudo-adhesive laminate, thereby producing the pseudo-adhesive label 1.

[0057] Alternatively, the pseudo-adhesive label 1 can also be produced by applying an adhesive composition to the surface of the pseudo-adhesive laminate on which the pseudo-adhesive layer 20 is formed to form an adhesive layer 30, and then attaching a release liner RL to the adhesive layer 30.

[0058] Examples of methods for applying the pressure-sensitive adhesive composition include roll coating, bar coating, knife coating, roll knife coating, blade coating, die coating, and gravure coating.

[0059] In order to improve the adhesion between the surface of the pseudo-adhesive laminate facing the pseudo-adhesive layer 20 and the pressure-sensitive adhesive layer 30, it is preferable to form the pressure-sensitive adhesive layer 30 after subjecting the surface of the pseudo-adhesive laminate facing the pseudo-adhesive layer 20 to a corona treatment or the like.

[0060] The pseudo adhesive label 1 may be appropriately subjected to a punching process. The punching process may be carried out, for example, by punching out the entire label together with the release liner RL using a punching blade that conforms to the contour of a predetermined label. Alternatively, cuts may be made from the substrate 10 to the adhesive layer 30 so as not to punch through the release liner RL, and a plurality of pseudo adhesive labels 1 may be arranged on the release liner RL. In this case, the cuts made by the punching process may penetrate into the release liner RL to an extent that the release liner RL is not punched out and falls off. Furthermore, if necessary, unnecessary portions around the outer periphery of each pseudo adhesive label 1 may be removed from on the release liner RL.

[0061] <Applications of pseudo adhesive labels> FIG. 2 is a schematic cross-sectional view showing a state in which the pseudo adhesive label 1 is attached to an adherend 100. As shown in FIG. The pseudo-adhesive label 1 according to this embodiment can be peeled off at the interface between the adhesive layer 30 and the release liner RL. As shown in Fig. 2, after being separated from the release liner RL, the adhesive layer 30 of the pseudo-adhesive label 1 is attached to the adherend 100. When the pseudo-adhesive label 1 is used as a shipping slip, the pseudo-adhesive label 1 may be attached on a packing tape or the like (not shown) for packing the adherend 100.

[0062] When the pseudo-adhesive label 1 is used as a delivery slip, an example of the adherend 100 is a delivery item. A delivery item is usually composed of an item to be delivered and a packaging material for packaging the item. Examples of the packaging material include wrapping paper, packaging film, packaging boxes, packaging containers, and packaging tape. Examples of the material of the packaging material include cardboard, paper, plastic, and metal. Since the pseudo-adhesive label 1 is attached to the packaging material of the delivery item, the adhesive layer 30 has an appropriate adhesive strength to the packaging material.

[0063] FIG. 3 is a schematic cross-sectional view showing a state in which the substrate 10 is peeled off from the pseudo adhesive label 1 attached to the adherend 100. As shown in FIG.

[0064] The pseudo adhesive label 1 according to this embodiment is used, for example, as a delivery slip. When the pseudo adhesive label 1 is used as a delivery slip, the entire base material 10 may be peeled off as a receipt. In addition, when the pseudo adhesive label 1 is used as a delivery slip, it is also preferable that the base material 10 of the pseudo adhesive label 1 is divided into a plurality of label pieces, for example, by a cut. For example, when the base material 10 is divided into two by a cut, one label piece can be used as a delivery slip and the other label piece can be used as a receipt. The label piece used as a receipt is usually peeled off at the interface A with the pseudo adhesive layer 20 after a seal or signature is applied. The other label piece remains on the delivery item, or on the box or container in which the delivery item is packed, etc. The receipt removed from the pseudo adhesive label 1 is used by a delivery company or the like for sorting out delivery slips.

[0065] (Effects of this embodiment) The pseudo adhesive label 1 according to this embodiment has excellent peelability between the substrate and the pseudo adhesive layer. In addition, the pseudo adhesive label 1 according to this embodiment is also excellent in tearability. Therefore, even if the pseudo adhesive label 1 is attached to a packaging tape or the like so that a part of the pseudo adhesive label 1 overlaps in a plan view, when the packaging tape or the like is peeled off after the base material of the pseudo adhesive label 1 is peeled off, stringiness or the like does not occur, and the pseudo adhesive layer of the pseudo adhesive label 1 can be torn in the direction of peeling off the tape or the like. This makes it easy to peel off the tape or the like. EXAMPLES

[0066] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0067] [Creating pseudo-adhesive labels] Example 1 The resin and filler shown in Table 1 were mixed to obtain a pseudo-adhesive layer material. The pseudo-adhesive layer material was heated to 260°C, and a resin layer having a thickness of 20 μm was applied to a substrate (basis weight 65 g / m) using a T-die. 2 The resin layer was extruded onto a thermal paper (thermal paper of 10000 mm). Cooling water adjusted to 23°C was passed through a water-cooled roll, and the resin layer on the substrate was brought into contact with the surface of the water-cooled roll, thereby cooling and solidifying the molten resin layer. In this manner, a pseudo-adhesive laminate was produced. Next, an acrylic adhesive composition was applied onto the release liner. A roll coater was used to apply the adhesive composition. The applied adhesive composition was dried to form an adhesive layer. The adhesive layer on the release liner and the pseudo-adhesive laminate (pseudo-adhesive layer on the substrate) were bonded together to produce a pseudo-adhesive label.

[0068] (Examples 2 to 9, Comparative Examples 1 to 2) For Examples 2 to 9 and Comparative Examples 1 and 2, the resin and filler were changed as shown in Table 1, but the same procedure as in Example 1 was followed to produce each pseudo-adhesive label.

[0069] [Evaluation of pseudo-adhesive labels] The peel strength and printability of each of the pseudo-adhesive labels produced in Examples 1 to 9 and Comparative Examples 1 and 2 were evaluated as follows. The evaluation results are shown in Table 1.

[0070] (Peeling Force Evaluation) The measurement was performed in accordance with the 180° peel adhesion of JIS Z 0237:2000. Specifically, the pseudo-adhesive label was first fixed to a stainless steel test plate using the adhesive layer of the pseudo-adhesive label itself. The substrate of the pseudo-adhesive label was then peeled off from the pseudo-adhesive layer at a peel speed of 0.3 m / min and a peel angle of 180°. The force required for this peeling (peel force) was measured, and the measured peel force was taken as the pseudo-adhesive force. The unit of pseudo-adhesive force is mN / 50 mm.

[0071] (Tearability evaluation) As shown in FIG. 4, first, a cloth tape 50 was attached to the surface of the craft paper 100A. Next, the adhesive layer side of the pseudo-adhesive label 1 was attached to the cloth tape 50 in a direction perpendicular to the cloth tape 50 in a plan view. Then, after peeling off the base material of the pseudo-adhesive label 1, the cloth tape was peeled off in the direction of the arrow B. The longest distance of the end of the pseudo-adhesive layer torn off from the craft paper due to the peeling of the cloth tape was measured, and evaluation was performed according to the following criteria. The test was performed in the flow direction of the pseudo-adhesive label 1 and in the direction perpendicular to it. In addition, cloth tape No. 111 manufactured by Okamoto Corporation was used as the cloth tape 50. A: Less than 5mm in both directions B: The larger value in both directions is between 5 mm and less than 10 mm C: The larger value in both directions is between 10 mm and less than 20 mm D: The larger value in both directions is 20 mm or more.

[0072] [Table 1]

[0073] As shown in Table 1, the pseudo-adhesive labels of Examples 1 to 9 were excellent in peelability. In addition, the pseudo-adhesive labels of Examples 2 to 9, including Example 1 shown in Fig. 5, were also excellent in tearability, with the pseudo-adhesive layer breaking at the edge of the cloth tape. On the other hand, in the case of the pseudo-adhesive label of Comparative Example 1, the thermal paper was destroyed when it was peeled off, so that it was not possible to measure the peel force or evaluate the tearability. Furthermore, as shown in Figure 6, the pseudo-adhesive label of Comparative Example 2 stretched due to the force applied to peel off the cloth tape without being torn, making the label less tearable than the pseudo-adhesive labels of Examples 1 to 9. [Explanation of symbols]

[0074] 1...pseudo adhesive label, 10...substrate, 20...pseudo adhesive layer, 30...adhesive layer, 50...cloth tape, 100...adherend, 100A...kraft paper, A...interface, B...arrow, RL...release liner.

Claims

1. A substrate; An adhesive layer; A pseudo-adhesive layer is included between the substrate and the pressure-sensitive adhesive layer, The pseudo-adhesive layer contains a polyolefin resin and a filler, The pseudo-adhesive layer pseudo-adheres to the substrate, The filler is not surface treated. Pseudo adhesive labels.

2. The pseudo-adhesive label according to claim 1, The polyolefin resin contains polyethylene as a main component. Pseudo adhesive labels.

3. The pseudo-adhesive label according to claim 1 or 2, The average particle size of the filler is 0.5 μm or more and 20 μm or less. Pseudo adhesive labels.

4. The pseudo adhesive label according to any one of claims 1 to 3, The ratio of the filler to the total volume of the polyolefin resin and the filler in the pseudo-adhesive layer is 1 vol% or more and 40 vol% or less. Pseudo adhesive labels.

5. The pseudo adhesive label according to any one of claims 1 to 4, The substrate is a paper substrate. Pseudo adhesive labels.

6. The pseudo-adhesive label according to claim 5, The paper substrate is a thermal paper. Pseudo adhesive labels.

7. The pseudo-adhesive label according to any one of claims 1 to 6, Further, the film has a release liner, The pressure-sensitive adhesive layer is attached to the release liner. Pseudo adhesive labels.

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