JP2020160308A - False adhesive label - Google Patents

Abstract

To provide a false adhesive label capable of bonding a base material and a false adhesive layer by appropriate false adhesive force to suppress the unintended peeling of the base material and suppress the breaking of the base material regardless of storage conditions of the false adhesive label.SOLUTION: A false adhesive label 1 comprises a base material 10, an adhesive layer 30 and a false adhesive layer 20 included between the base material 10 and the adhesive layer 30. The adhesive layer 30 includes an adhesive application resin; the false adhesion layer 20 includes a thermoplastic resin having a crystallinity of 22.5% or less; the crystallinity of the thermoplastic resin is a value calculated on the basis of scattering intensity measured by a wide angle X-ray diffraction method; the false adhesion layer 20 is falsely bonded to the base material 10; and the false adhesive force of the false adhesive layer 20 to the base material 10 is 250 mN/50 mm or more and 1500 mN/50 mm or less.SELECTED DRAWING: Figure 3

Description

The present invention relates to a pseudo-adhesive label.

The pseudo-adhesive label is a label on which the base material can be easily peeled off from the pseudo-adhesive interface after being attached to the adherend. The pseudo-adhesive label has been put into practical use as, for example, a delivery slip, an information hiding label, or the like.

For example, Patent Document 1 describes display papers such as tags and labels composed of various printed paper substrates, transparent synthetic resin films, pressure-sensitive adhesives, and release papers.

In the display paper described in Patent Document 1, when the paper base material on the surface is peeled off, the paper base material may be torn. That is, there is a possibility that peeling occurs between the layers of the paper base material and only the upper layer of the paper base material is mainly partially peeled off, and the region under the peeled upper layer remains on the thermoplastic resin layer.

Patent Document 2 describes a pseudo-adhesive label in which a paper base material, a thermoplastic resin layer, and an adhesive layer are laminated in this order as a pseudo-adhesive label for solving the problems described in Patent Document 1. There is. In the pseudo-adhesive label described in Patent Document 2, the paper base material can be peeled off from the thermoplastic resin layer in a state where the pressure-sensitive adhesive layer is attached to the adherend. Further, in the pseudo-adhesive label, the interlayer strength of the base material is determined, and when the paper base material is peeled off at a peeling speed of 0.3 m / min, the interlayer strength of the paper base material in the vertical direction and the horizontal direction is determined. Is also 6.0 N / 50 mm or more.

Special Publication No. 55-15835 JP-A-2010-243919

A pseudo-adhesive label (for example, the pseudo-adhesive label described in Patent Document 2) in which a paper base material, a thermoplastic resin layer, and an adhesive layer are laminated in this order is often used for a delivery slip. The pseudo-adhesive label is affixed to the adherend (delivery) at the time of shipment, and after that, the paper base material on which the delivery information is described is combined with the thermoplastic resin layer through processes such as storage and delivery. Peel off at the interface of. Therefore, the pseudo-adhesive label has a pseudo-adhesive force such that the paper base material and the thermoplastic resin layer do not peel off at the interface during the delivery process, and the paper base material can be easily peeled off from the thermoplastic resin layer after the delivery is completed. Is required. Further, the pseudo-adhesive label is also required to have an adhesive strength to the extent that the pseudo-adhesive label does not peel off from the delivered product.
By the way, depending on the storage conditions until the pseudo-adhesive label is attached to the adherend, it may be difficult to peel off the paper base material from the pseudo-adhesive layer, and the paper base material may be torn. For example, the paper base material may be torn when the paper base material is peeled off after the pseudo adhesive label stored for a long period of time or the pseudo adhesive label stored under high temperature and high humidity is attached to the adherend. is there. The base material located on the surface of the pseudo-adhesive label is not limited to the paper base material. Even if the base material is made of another material, it may be difficult to peel off the base material from the pseudo-adhesive layer.

An object of the present invention is to bond a base material and a pseudo-adhesive layer with an appropriate pseudo-adhesive force, suppress unintended peeling of the base material, and suppress tearing of the base material regardless of storage conditions of the pseudo-adhesive label. It is to provide a pseudo-adhesive label that can.

According to one aspect of the present invention, it has a base material, a pressure-sensitive adhesive layer, and a pseudo-adhesive layer contained between the base material and the pressure-sensitive adhesive layer, and the pressure-sensitive adhesive layer is a pressure-sensitive adhesive resin. The pseudo-adhesive layer contains a thermoplastic resin having a degree of crystallization of 22.5% or less, and the degree of crystallization is a value calculated based on the scattering intensity measured by a wide-angle X-ray diffraction method. A pseudo-adhesive label is provided in which the pseudo-adhesive layer is pseudo-adhesive to the base material, and the pseudo-adhesive force of the pseudo-adhesive layer to the base material is 250 mN / 50 mm or more and 1500 mN / 50 mm or less. To.

In the pseudo-adhesive label according to one aspect of the present invention, the pressure-sensitive adhesive layer contains a base material polymer, and the content of the pressure-sensitive adhesive resin in the pressure-sensitive adhesive layer is 0.1 with respect to 100 parts by mass of the base material polymer. It is preferably more than parts by mass and less than 200 parts by mass.

In the pseudo-adhesive label according to one aspect of the present invention, the thermoplastic resin having a crystallinity of 22.5% or less is preferably a polyolefin resin.

In the pseudo-adhesive label according to one aspect of the present invention, the adhesive strength of the pseudo-adhesive label in JIS Z 0237: 2009 is preferably 6.0 N / 25 mm or more.

In the pseudo-adhesive label according to one aspect of the present invention, the adhesive strength of the pseudo-adhesive label when polyethylene is used as an adherend is preferably 5.0 N / 25 mm or more.

In the pseudo-adhesive label according to one aspect of the present invention, the pseudo-adhesive layer preferably contains 80% by mass or more of a thermoplastic resin having a crystallinity of 22.5% or less.

In the pseudo-adhesive label according to one aspect of the present invention, the base material is preferably a paper base material.

The pseudo-adhesive label according to one aspect of the present invention preferably further has a release sheet, and the pressure-sensitive adhesive layer is preferably attached to the release sheet.

According to one aspect of the present invention, the base material and the pseudo-adhesive label are adhered with an appropriate pseudo-adhesive force to suppress unintended peeling of the base material, and the base material can be used regardless of the storage conditions of the pseudo-adhesive label. It is possible to provide a pseudo-adhesive label capable of suppressing tearing.

It is sectional drawing of the pseudo adhesive label which concerns on one aspect of this invention. It is sectional drawing which shows the state which the pseudo-adhesive label which concerns on one aspect of this invention is attached to the adherend. It is sectional drawing for demonstrating the state which the base material is peeled off from the pseudo-adhesive label which concerns on one aspect of this invention.

When the pseudo-adhesive force between the paper base material of the pseudo-adhesive label and the thermoplastic resin layer (pseudo-adhesive layer) exceeds 1500 N / 50 mm, the present inventors when peeling the paper base material from the thermoplastic resin layer. We found that the paper substrate tends to tear easily.
In addition, since various materials may be used for the deliverables that are the adherends of the pseudo-adhesive label, even if the deliverables are difficult-to-adhere materials, they will not be easily peeled off. The pressure-sensitive adhesive layer of the adhesive label needs to have low adherend selectivity. Therefore, the pressure-sensitive adhesive layer is often composed of a pressure-sensitive adhesive containing a main agent polymer and a pressure-imparting resin (sometimes referred to as a tackifier).
The present inventors have found that when the pressure-sensitive adhesive layer contains a tack-imparting resin, the pseudo-adhesive force tends to increase with the passage of time. Further, the present inventors have found that the pseudo-adhesive force tends to increase even when the pseudo-adhesive label is stored under high temperature and high humidity.
Therefore, the present inventors redden the interface between the base material and the pseudo-adhesive layer after storing the pseudo-adhesive label provided with the pressure-sensitive adhesive layer containing the tackifier resin for a long period of time or after storing under high temperature and high humidity. When analyzed by infrared spectroscopy (IR), it was confirmed that the tackifier resin in the pressure-sensitive adhesive layer had moved to the interface between the base material and the pseudo-bonding layer.
Based on such analysis results, the present inventors have determined the heat contained in the pseudo-adhesive layer as a means for suppressing the tackifier resin in the pressure-sensitive adhesive layer from reaching the interface between the base material and the pseudo-adhesive layer. We focused on the crystallinity of the plastic resin. As a result of examining the relationship between the crystallinity of various thermoplastic resins and the pseudo-adhesiveness, it was found that if the crystallinity is less than a predetermined value, the above-mentioned increase in the pseudo-adhesive force with the passage of time can be suppressed. ..
The present invention has been invented based on the above findings.
Hereinafter, the present invention will be described with reference to an embodiment of the present invention as an example, but the present invention is not limited to this embodiment.

[Embodiment according to one aspect of the present invention]
(Pseudo adhesive label)
The pseudo-adhesive label according to the present embodiment has a base material, an adhesive layer, and a pseudo-adhesive layer included between the base material and the pressure-sensitive adhesive layer. The pseudo-adhesive layer is pseudo-adhesive to the base material.

FIG. 1 shows a schematic cross-sectional view of the pseudo-adhesive label 1 according to the present embodiment. In the pseudo-adhesive label 1 according to the present embodiment, the base material 10, the pseudo-adhesive layer 20, and the pressure-sensitive adhesive layer 30 are laminated in this order. The base material 10 and the pseudo-adhesive layer 20 are pseudo-adhesive to each other at the interface A.
Further, the pseudo-adhesive label 1 according to the present embodiment further has a release sheet RL as shown in FIG. The pseudo-adhesive label according to the present invention is not limited to the embodiment having the release sheet RL.

"Pseudo-adhesion" means that it can be easily peeled off at the interface between one layer and the other layer bonded under specific conditions (for example, combination of materials and temperature range), and after peeling, re-adhesion and re-adhesion. Adhesion in a mode that does not show sex.
In the case of the pseudo-adhesive label according to the present embodiment, the base material 10 as one layer and the pseudo-adhesive layer 20 as the other layer can be peeled off at the interface A, and the surface of the base material 10 after peeling off is on the interface A side. , And the interface A side surface of the pseudo-adhesive layer 20 does not show re-adhesiveness and re-adhesiveness.

The shape of the pseudo-adhesive label 1 is not particularly limited. Examples of the shape of the pseudo-adhesive label 1 in a plan view include polygons (for example, rectangles and triangles), circles, ellipses, and indeterminate forms.

(Base material)
The base material 10 included in the pseudo-adhesive label 1 according to the present embodiment is not particularly limited.
The base material 10 is appropriately selected from the base materials used in the conventional pseudo-adhesive label according to the purpose of use of the pseudo-adhesive label 1.
In the pseudo-adhesive label 1, the base material 10 is an information display base material that displays information about the adherend. Information on the adherend includes, for example, when the adherend is a delivery, the name or name of the sender, the destination, and the delivery company, the address, the telephone number, the contents of the shipment, and the like.

The thickness of the base material 10 is appropriately selected according to the use of the pseudo-adhesive label 1. From the viewpoint of handleability, the thickness of the base material 10 is preferably 10 μm or more and 200 μm or less, more preferably 20 μm or more and 150 μm or less, and further preferably 30 μm or more and 100 μm or less.
Examples of the base material 10 include papers, resin films, synthetic papers, and laminated sheets in which two or more layers thereof are laminated.
Examples of papers that can be used as the base material 10 include thermal paper, kraft paper, high-quality paper, glassin paper, parchment paper, rayon paper, coated paper, and synthetic fiber paper.
Examples of the resin film that can be used as the base material 10 include a polyester-based resin, a polyvinyl chloride-based resin, a polyvinylidene chloride-based resin, and a polyolefin-based resin film.

The base material 10 is preferably a paper base material made of paper and synthetic paper, and more preferably thermal paper, kraft paper, high-quality paper, or glassin paper.
The basis weight of the paper substrate is preferably 10 g / m ² or more and 100 g / m ² or less, and more preferably 15 g / m ² or more and 80 g / m ² or less. According to the pseudo-adhesive label 1 according to the present embodiment, even if the base material 10 is a paper base material having such a basis weight range, tearing of the base material at the time of peeling the base material can be suppressed.

(Pseudo adhesive layer)
The pseudo-adhesive layer 20 of the pseudo-adhesive label 1 according to the present embodiment contains a thermoplastic resin having a crystallinity of 22.5% or less.
In the present specification, the crystallinity of the pseudo-adhesive layer is a value calculated based on the scattering intensity measured by the wide-angle X-ray diffraction method.
The crystallinity of the thermoplastic resin contained in the pseudo-adhesive layer 20 is preferably 10% or more, and more preferably 15% or more.
The crystallinity of the thermoplastic resin contained in the pseudo-adhesive layer 20 is preferably 22.0% or less, and more preferably 21.5% or less.

The pseudo-adhesive layer 20 according to one embodiment of the present embodiment is preferably formed only from a thermoplastic resin having a crystallinity of 22.5% or less. When the pseudo-adhesive layer 20 is substantially composed of only a thermoplastic resin having a crystallinity of 22.5% or less, 80% by mass or more of the total mass of the pseudo-adhesive layer 20 has a crystallinity. It means that it is composed of 22.5% or less of a thermoplastic resin. The pseudo-adhesive layer 20 preferably contains 85% by mass or more of a thermoplastic resin having a crystallinity of 22.5% or less, more preferably 90% by mass or more, based on the total mass of the pseudo-adhesive layer 20. , 95% by mass or more is more preferable. The content of the thermoplastic resin in the pseudo-adhesive layer 20 is defined as "substantially" because of impurities that may be contained in the raw materials used for producing the pseudo-adhesive layer 20 or the pseudo-adhesive layer. This is because impurities that may be mixed in during the manufacturing process of the above may be unintentionally contained in the pseudo-adhesive layer 20.

The pseudo-adhesive layer 20 according to the present embodiment is directly laminated on the base material 10.
The pseudo-adhesive force of the pseudo-adhesive layer 20 with respect to the base material 10 is 250 mN / 50 mm or more and 1500 mN / 50 mm or less.
The pseudo-adhesive force of the pseudo-adhesive layer 20 with respect to the base material 10 is preferably 350 mN / 50 mm or more, and more preferably 450 mN / 50 mm or more.
The pseudo-adhesive force of the pseudo-adhesive layer 20 with respect to the base material 10 is preferably 1200 mN / 50 mm or less, and more preferably 1000 mN / 50 mm or less.
When the pseudo-adhesive force of the pseudo-adhesive layer 20 with respect to the base material 10 is 250 mN / 50 mm or more, it is possible to prevent the base material 10 from unintentionally peeling from the pseudo-adhesive layer 20.
When the pseudo-adhesive force of the pseudo-adhesive layer 20 with respect to the base material 10 is 1500 mN / 50 mm or less, it is possible to prevent the base material 10 from being torn when the base material 10 is peeled from the pseudo-adhesive layer 20.

After storing the pseudo-adhesive label 1 at 60 ° C. and 95% RH for 3 days, the pseudo-adhesive force of the pseudo-adhesive layer 20 with respect to the base material 10 is preferably 450 mN / 50 mm or more, and 550 mN / 50 mm or more. Is more preferable.
After storing the pseudo-adhesive label 1 under the conditions of 60 ° C. and 95% RH for 3 days, the pseudo-adhesive force of the pseudo-adhesive layer 20 with respect to the base material 10 is preferably 1500 mN / 50 mm or less, preferably 1450 mN / 50 mm or less. Is more preferable.
The pseudo-adhesive force of the pseudo-adhesive layer 20 to the base material 10 after being stored for 3 days under the conditions of 60 ° C. and 95% RH may be described as “(time) pseudo-adhesive force”.
The pseudo-adhesive force of the pseudo-adhesive layer 20 with respect to the base material 10 can be measured by the method described in Examples described later.

The thermoplastic resin contained in the pseudo-adhesive layer 20 is not particularly limited as long as it is a crystalline thermoplastic resin and the crystallinity is 22.5% or less. As will be described later, the crystallinity can be controlled by appropriately changing the conditions for forming the pseudo-adhesive layer 20 according to the type of the thermoplastic resin.
Examples of the thermoplastic resin contained in the pseudo-adhesive layer 20 include polyolefin-based resins, polyester-based resins, and polyamide-based resins. The pseudo-adhesive layer 20 may contain one type of thermoplastic resin, or may contain two or more types of thermoplastic resin.

The thermoplastic resin contained in the pseudo-adhesive layer 20 is preferably a polyolefin resin. The polyolefin-based resin is a polymer having at least a structural unit derived from an olefin monomer.
The olefin monomer is preferably an olefin having 2 or more carbon atoms and 8 or less carbon atoms. Examples of the olefin having 2 or more and 8 or less carbon atoms include ethylene, propylene, butylene, isobutylene and 1-hexene.
In one embodiment of the present 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 or more and 4 or less carbon atoms. More preferably, it is at least one monomer selected from the group consisting of ethylene and propylene, which are 2 or more and 3 or less olefins.
The polyolefin-based 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.

Examples of the polyolefin resin include polyethylene resin, polypropylene resin (PP), polybutene resin (PB), ethylene-propylene copolymer, olefin elastomer (TPO), ethylene-vinyl acetate copolymer (EVA), and ethylene-. Examples thereof include olefin-based ternary copolymers such as methyl methacrylate copolymer (EMMA) and ethylene-propylene- (5-ethylidene-2-norbornene). 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 is preferably selected from the group consisting of polyethylene resin and polypropylene resin (PP). More preferably, it is at least one of the resins used.
The polyethylene resin, for example, ultra low density polyethylene (VLDPE, density: 880 kg / ^{m 3} or more 910 kg / ^m less than ^3), low density polyethylene (LDPE, density: 910 kg / ^{m 3} or more 915 kg / ^m less than ^3), medium-density Examples thereof include polyethylene (MDPE, density: 915 kg / m ³ or more and less than 942 kg / m ³ ), high density polyethylene (HDPE, density: 942 kg / m ³ or more), linear polyethylene and the like.

The content of the structural unit derived from the olefin having 2 to 4 carbon atoms in the polyolefin-based resin shall be 50% by mass or more and 100% by mass or less with respect to the total structural unit (100% by mass) of the olefin-based resin. It is more preferably 60% by mass or more and 100% by mass or less, further preferably 70% by mass or more and 100% by mass or less, and further preferably 80% by mass or more and 100% by mass or less. It is preferable that it is 90% by mass or more and 100% by mass or less.

The pseudo-adhesive layer 20 may contain one type of polyolefin resin as a thermoplastic resin, or may contain two or more types.

When the base material 10 is a paper base material, the pseudo-adhesive layer 20 is contained from the viewpoint of realizing good pseudo-adhesiveness with the paper base material and from the viewpoint of easy thermocompression bonding to the paper base material. The thermoplastic resin to be bonded is preferably at least one of a polyethylene resin and a polypropylene resin.

The pseudo-adhesive layer 20 according to the present embodiment may contain additives as long as the effects of the present embodiment are not impaired. Examples of the additive include an antioxidant, a lubricant, an ultraviolet absorber, a colorant, an antiblocking agent and the like. When the pseudo-adhesive layer 20 contains an additive, the additive may be one kind or two or more kinds.
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 with respect to 100 parts by mass of the thermoplastic resin, preferably 0.0005. It is more preferably parts by mass or more and 15 parts by mass or less, and further preferably 0.001 parts by mass or more and 10 parts by mass or less.

The thickness of the pseudo-adhesive layer 20 is not particularly limited. The thickness of the pseudo-adhesive layer 20 is preferably 5 μm or more and 50 μm or less, more preferably 5 μm or more and 40 μm or less, further preferably 10 μm or more and 40 μm or less, and 10 μm or more and 30 μm or less. It is even more preferable to have.
When the pseudo-adhesive layer 20 contains a polyolefin-based resin as the thermoplastic resin, the thickness of the pseudo-adhesive layer 20 is preferably 15 μm or more and 25 μm or less.

(Adhesive layer)
The pressure-sensitive adhesive layer 30 of the pseudo-adhesive label 1 contains a pressure-imparting resin. The tackifier resin may be referred to as a tack fire.
As described above, the pressure-sensitive adhesive layer 30 according to the present embodiment contains a tack-imparting resin from the viewpoint of reducing the selectivity of the adherend and suppressing unintended peeling of the pseudo-adhesive label in the delivery process or the like.
The pressure-sensitive adhesive layer 30 of the pseudo-adhesive label 1 according to the present embodiment is a layer for attaching the pseudo-adhesive label to the adherend. The components constituting the pressure-sensitive adhesive layer 30 are not particularly limited as long as they contain the pressure-sensitive adhesive resin, and are appropriately selected depending on the use of the pseudo-adhesive label 1.

Examples of the tackifier resin contained in the pressure-sensitive adhesive layer 30 include rosin-based resin, terpene phenol resin, terpene resin, aromatic hydrocarbon-modified terpene resin, aliphatic petroleum resin, aromatic petroleum resin, and hydrogenated petroleum resin. , Kumaron-inden resin, styrene resin, phenol resin, xylene resin and the like.

The pressure-sensitive adhesive layer 30 preferably contains a known pressure-sensitive adhesive. Examples of the pressure-sensitive adhesive formed in combination with the pressure-sensitive adhesive in the pressure-sensitive adhesive layer 30 include pressure-sensitive adhesives such as acrylic pressure-sensitive adhesives, natural rubber-based pressure-sensitive adhesives, synthetic rubber-based pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives. Be done.
The pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer 30 is preferably an acrylic pressure-sensitive adhesive from the viewpoint of weather resistance and price. Examples of the acrylic pressure-sensitive adhesive include solvent-based acrylic pressure-sensitive adhesives and water-based emulsion-type acrylic resins.

The content of the tackifier resin in the pressure-sensitive adhesive layer 30 is preferably 0.1 part by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the main polymer of the pressure-sensitive adhesive.
When the pressure-sensitive adhesive layer 30 contains an acrylic resin as the main agent polymer, the content of the tackifier resin may be 0.1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the acrylic resin as the main agent polymer. It is preferably 0.3 parts by mass or more and 25 parts by mass or less.
When the pressure-sensitive adhesive layer 30 contains synthetic rubber as the main polymer, the content of the tackifier resin may be 0.1 part by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the synthetic rubber as the main polymer. It is preferably 0.5 parts by mass or more and 100 parts by mass or less.

The pressure-sensitive adhesive layer 30 may further contain an additive, if necessary. Examples of the additive that the pressure-sensitive adhesive layer 30 may contain include a filler, a softener, a thermal light stabilizer, an antioxidant, and a cross-linking agent. Examples of the filler include zinc oxide, titanium oxide, silica, calcium carbonate, barium sulfate and the like. Examples of the softener include process oils, liquid rubbers and plasticizers. Examples of the thermal light stabilizer include benzophenone-based stabilizers, benzotriazole-based stabilizers, hindered amine-based stabilizers, and the like, and examples of antioxidants include anilide-based antioxidants, phenol-based antioxidants, and phos. Examples thereof include phyto-based antioxidants and thioester-based antioxidants.

The thickness of the pressure-sensitive adhesive layer 30 is appropriately selected according to the use of the pseudo-adhesive label 1. The thickness of the pressure-sensitive 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, further preferably 10 μm or more and 40 μm or less, and 10 μm or more and 30 μm or less. It is even more preferably 10 μm or more and 20 μm or less.

The adhesive strength of the pseudo-adhesive label 1 in JIS Z 0237: 2009 is preferably 6.0 N / 25 mm or more, preferably 6.0 N / 25 mm or more, from the viewpoint of suppressing the pseudo-adhesive label 1 from being unintentionally peeled from the adherend. More preferably, it is 0.0 N / 25 mm or more.
Further, even if the adherend is a poorly adhesive material, it is preferable that the pseudo-adhesive label 1 exhibits sufficient adhesive strength. A typical example of a poorly adhesive adherend is a packaging material of a polyethylene film, and the adhesive strength of the pseudo-adhesive label 1 when polyethylene is used as an adherend is preferably 5.0 N / 25 mm or more. , 7.0 N / 25 mm or more is more preferable, and 8.0 N / 25 mm or more is more preferable.
A method for measuring the adhesive strength of the pseudo-adhesive label when polyethylene is used as an adherend will be described in Examples described later.

(Release sheet)
The release sheet RL protects the pressure-sensitive adhesive layer 30 until the pseudo-adhesive label 1 is attached to the adherend.
The release sheet RL is not particularly limited as long as it can be used by being attached to the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet. Examples of the release sheet RL include a single-sided release sheet and a double-sided release sheet. The single-sided release sheet has a release sheet base material and a release treatment layer provided on one surface of the release sheet base material. The double-sided release sheet includes a release sheet base material, a first release treatment layer provided on one surface of the release sheet base material, and a second release treatment layer provided on the other surface of the release sheet base material. And have. The release treatment layer can be formed by applying a release agent on the surface of the release sheet base material.

Examples of the base material for the release sheet include papers and plastic films.
Examples of papers include high-quality paper, glassine paper, kraft paper and the like. Examples of the plastic film include a polyester resin film and a polyolefin resin film. Examples of the polyester resin film include films such as polyethylene terephthalate resin, polybutylene terephthalate resin, and polyethylene naphthalate resin. Examples of the polyolefin resin film include films such as polypropylene resin and polyethylene resin.
The papers and plastic film used as the base material for the release sheet may be the same as or different from the papers and plastic film exemplified in the description of the base material 10 of the pseudo-adhesive label 1, for example.

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.

The thickness of the release sheet RL is not particularly limited. The thickness of the release sheet RL is preferably 10 μm or more and 200 μm or less, more preferably 25 μm or more and 170 μm or less, further preferably 30 μm or more and 150 μm or less, and 35 μm or more and 100 μm or less. It is even more preferable, and it is even more preferable that it is 35 μm or more and 80 μm or less.

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

・ Process P1
Step P1 is a step of laminating the base material 10 and the pseudo-adhesive layer 20. A laminate in which the interface A between the base material 10 and the pseudo-adhesive layer 20 manufactured in step P1 is pseudo-bonded may be hereinafter referred to as a “pseudo-adhesive laminate”.

・ Process P2
Step P2 is a step of laminating the pressure-sensitive adhesive layer 30 on the pseudo-adhesive layer 20 of the pseudo-adhesive laminate obtained in step P1.

First, step P1 will be described.
The method of laminating the pseudo-adhesive layer 20 on the base material 10 is not particularly limited.
The method for manufacturing the pseudo-adhesive label 1 according to the present embodiment includes a step (melt extrusion step) of melt-extruding the pseudo-adhesive layer material containing the material constituting the pseudo-adhesive layer 20 onto the base material 10. In the method for producing the pseudo-adhesive label 1 according to the present embodiment, the pseudo-adhesive layer material contains at least a thermoplastic resin. When the material constituting the pseudo-adhesive layer 20 in the present embodiment is composed of only a predetermined thermoplastic resin, the “pseudo-adhesive layer material” corresponds to the thermoplastic resin. When the material constituting the pseudo-adhesive layer 20 contains not only a predetermined thermoplastic resin but also other materials, the "pseudo-adhesive layer material" corresponds to a composition containing the thermoplastic resin. ..

Examples of the method of melt-extruding the pseudo-adhesive layer material include a method using a T-die.
The temperature at which the pseudo-adhesive layer material is melted and extruded (melt extrusion temperature) is one of the elements for controlling the crystallinity within a desired range (22.5% or less). The melt extrusion temperature of the pseudo-adhesive layer material is preferably set as appropriate so that a desired crystallinity can be obtained according to the type of the thermoplastic resin constituting the pseudo-adhesive layer 20. Further, the melt extrusion temperature is more preferably a temperature at which the pseudo-adhesive layer material does not melt and stick to the base material 10.
When a polyolefin resin is used as the thermoplastic resin constituting the pseudo-adhesive layer 20, the melt extrusion temperature is usually 200 ° C. or higher and 400 ° C. or lower, preferably 230 ° C. or higher and 350 ° C. or lower, preferably 250 ° C. or higher. More preferably, it is ℃ or more and 300 ℃ or less.

Further, the thickness of the thermoplastic resin layer when the pseudo-adhesive layer material is melted and extruded is also one of the factors for controlling the crystallinity within a desired range (22.5% or less). The thickness of the thermoplastic resin layer to be melt-extruded is preferably set as appropriate so that a desired crystallinity can be obtained according to the type of the thermoplastic resin constituting the pseudo-adhesive layer 20.
When a polyolefin resin is used as the thermoplastic resin constituting the pseudo-adhesive layer 20, the thickness of the thermoplastic resin layer to be melt-extruded is preferably 15 μm or more and 25 μm or less, and is 18 μm or more and 23 μm or less. Is more preferable.

The step P1 also includes a step (cooling step) of cooling the melt-extruded pseudo-adhesive layer material.
In the cooling step, the heat-melted pseudo-adhesive layer material is brought into contact with a cooling means such as a cooling roll to form the pseudo-adhesive layer 20. The cooling roll has a tubular body whose outer peripheral surface is made of metal. The cooling roll has a cooling function by passing cooling water or the like through the inside of the cylinder. When a cooling roll is used as the cooling means, the pseudo-adhesive layer material melt-extruded onto the base material may be brought into direct contact with the outer peripheral surface of the cooling roll for cooling, or the base material may be placed on the outer peripheral surface of the cooling roll. The pseudo-adhesive layer material may be indirectly cooled by direct contact. Further, in the cooling step, the melt-extruded pseudo-adhesive layer material may be cooled by air cooling.
The temperature at which the pseudo-adhesive layer material is cooled (cooling temperature) is also one of the factors for controlling the crystallinity of the thermoplastic resin within a desired range (22.5% or less). The cooling temperature of the pseudo-adhesive layer material is preferably set as appropriate so that a desired crystallinity can be obtained according to the type of the thermoplastic resin constituting the pseudo-adhesive layer 20.
When a polyolefin resin is used as the thermoplastic resin constituting the pseudo-adhesive layer 20, the cooling temperature 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 passing through the cooling roll. When the pseudo-adhesive layer material is cooled by air cooling, the cooling temperature is the ambient temperature at which the melt-extruded pseudo-adhesive layer material is placed, or when the temperature-controlled air is forcibly blown onto the pseudo-adhesive layer material. Is the temperature of the air.

In the cooling step according to the present embodiment, the crystallinity of the thermoplastic resin is controlled within a desired range (22.5% or less) by controlling the length of time for cooling the molten pseudo-adhesive layer material by the cooling means. It is one of the elements of.
When a cooling roll is used as the cooling means, the time (cooling time) for bringing the molten pseudo-adhesive layer material into direct or indirect contact with the outer peripheral surface of the cooling roll is a laminate in which the base material and the pseudo-adhesive layer material are laminated. (In this specification, it may be referred to as a processing speed) can be controlled, and as a result, the degree of crystallization of the thermoplastic resin can also be controlled. The processing speed is preferably set as appropriate so that a desired crystallinity can be obtained according to the type of the thermoplastic resin constituting the pseudo-adhesive layer 20.
When a polyolefin resin is used as the thermoplastic resin constituting the pseudo-adhesive layer 20, the processing speed is preferably 40 m / min or more and 180 m / min or less, and preferably 50 m / min or more and 160 m / min or less.

The crystallinity of the thermoplastic resin in the pseudo-adhesive layer 20 can be controlled by adjusting at least one of the melt extrusion temperature, the thickness of the thermoplastic resin layer to be melt-extruded, the cooling temperature, and the cooling time. The elements that control the crystallinity of the thermoplastic resin are not limited to these elements.

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

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

Specifically, a pressure-sensitive adhesive composition containing a material constituting the pressure-sensitive adhesive layer 30 is applied to the peel-processed surface of the release sheet RL to form the pressure-sensitive adhesive layer 30 on the release sheet RL. The pressure-sensitive adhesive composition in step P2 contains a pressure-imparting resin and a base polymer. The pseudo-adhesive label 1 can be manufactured by attaching the pressure-sensitive adhesive layer 30 formed on the release sheet RL to the surface of the pseudo-adhesive laminate on the pseudo-adhesive layer 20 side.

Alternatively, the pseudo-adhesive label may be formed by applying the pressure-sensitive adhesive composition to the surface of the pseudo-adhesive laminate on the side of the pseudo-adhesive layer 20 to form the pressure-sensitive adhesive layer 30, and further attaching the release sheet RL to the pressure-sensitive adhesive layer 30. 1 can be manufactured.

Examples of the method for applying the pressure-sensitive adhesive composition include a roll coating method, a spin coating method, a spray coating method, a bar coating method, a knife coating method, a roll knife coating method, a blade coating method, a die coating method and a gravure coating method. Can be mentioned.

From the viewpoint of improving the adhesion between the surface of the pseudo-adhesive laminate on the pseudo-adhesive layer 20 side and the adhesive layer 30, the surface of the pseudo-adhesive laminate on the pseudo-adhesive layer 20 side is subjected to corona treatment or the like and then adhered. It is preferable to form the agent layer 30.

The pseudo-adhesive label 1 may be punched as appropriate.
In the punching process, for example, the peeling sheet RL may be punched out by using a punching blade along the outer shell of a predetermined label.
Further, the base material 10 to the pressure-sensitive adhesive layer 30 may be cut so as not to punch out the release sheet RL, and a plurality of pseudo-adhesive labels 1 may be formed so as to be arranged on the release sheet RL. In this case, the cut by the punching process may enter the release sheet RL to the extent that the release sheet RL is not punched out and falls off.
Further, if necessary, unnecessary portions around the outer shell of each pseudo-adhesive label 1 may be removed from the release sheet RL.

<Use of pseudo-adhesive label>
FIG. 2 is a schematic cross-sectional view showing a state in which the pseudo-adhesive label 1 is attached to the adherend 100.
The pseudo-adhesive label 1 according to the present embodiment can be peeled off at the interface between the pressure-sensitive adhesive layer 30 and the release sheet RL. As shown in FIG. 2, after separating from the release sheet RL, the pressure-sensitive 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 delivery slip, the adherend 100 includes, for example, a delivery item. The delivered item is usually composed of an article to be delivered and a packaging material for packaging the article. Examples of the packaging material include wrapping paper, wrapping film, wrapping box, wrapping container and the like. 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 delivered product, the pressure-sensitive adhesive layer 30 has an appropriate adhesive force to the packaging material.

FIG. 3 is a schematic cross-sectional view showing a state in which the base material 10 is peeled off from the pseudo-adhesive label 1 attached to the adherend 100.

The pseudo-adhesive label 1 according to the present 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 slip.
Further, 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 by, for example, notches. For example, when the base material 10 is divided into two by a notch, one label piece can be used as a delivery slip and the other label piece can be used as a receipt slip. The label piece as a receipt is usually peeled off at the interface A with the pseudo-adhesive layer 20 after being stamped or signed. The other label piece remains in the delivery, or in the box or container in which the delivery is packed.
The receipt slip peeled off from the pseudo-adhesive label 1 is used by a delivery company or the like for slip arrangement or the like.

(Effect of this embodiment)
The pseudo-adhesive label 1 according to the present embodiment has a pressure-sensitive adhesive layer 30 containing a pressure-sensitive adhesive resin. Therefore, the pseudo-adhesive label 1 has a small adherend selectivity and can suppress peeling from the adherend during the delivery process or the like.
Further, the pseudo-adhesive layer 20 of the pseudo-adhesive label 1 according to the present embodiment contains a thermoplastic resin having a crystallinity of 22.5% or less, and the pseudo-adhesive force of the pseudo-adhesive layer 20 to the base material 10 is 250 mN. / 50 mm or more and 1500 mN / 50 mm or less. Therefore, the base material 10 and the pseudo-adhesive layer 20 are adhered with an appropriate pseudo-adhesive force, and according to the pseudo-adhesive label 1, it is possible to prevent the base material 10 from being unintentionally peeled from the pseudo-adhesive layer 20. Further, according to the pseudo-adhesive label 1, the base material 10 can be easily peeled off from the pseudo-adhesive layer 20 regardless of the storage conditions of the pseudo-adhesive label, so that the base material 10 can be suppressed from being torn.

Hereinafter, the present invention will be described in more detail with reference to examples. The present invention is not limited to these examples.

[Making a pseudo-adhesive label]
(Example 1)
The thermoplastic resin as the pseudo-adhesive layer material was heated to 260 ° C., and a 20 μm-thick thermoplastic resin layer was extruded onto the base material using a T-die. The thickness of the thermoplastic resin layer was controlled by adjusting the back pressure of the extruder screw. The molten thermoplastic resin layer is cooled by passing cooling water whose water temperature is adjusted to 23 ° C. through a water-cooled roll and bringing the thermoplastic resin layer on the substrate into contact with the surface of the water-cooled roll. , Solidified. In this way, a pseudo-adhesive layer laminated on the substrate was produced. In Example 1, thermal TP60KS-F1 (basis weight 65 g / m ² ) manufactured by Nippon Paper Industries Corporation was used as the surface base material, and LC8001 manufactured by Japan Polyethylene was used as the thermoplastic resin of the pseudo-adhesive layer material.
The transport speed of the base material when producing the pseudo-adhesive layer, that is, the processing speed of the pseudo-adhesive layer was set to 150 m / min.
Next, 100 parts by mass of an acrylic pressure-sensitive adhesive (BPW6137N manufactured by Toyochem Co., Ltd.) and 7.5 parts by mass of a rosin-based tack fire (KE-100 manufactured by Arakawa Chemical Industries, Ltd.) are mixed to prepare a pressure-sensitive adhesive composition. Made. Next, the prepared pressure-sensitive adhesive composition was applied onto a release paper. As the release paper, "8K Ao" manufactured by Lintec Corporation was used. A roll coater was used to apply the pressure-sensitive adhesive composition.
The applied pressure-sensitive adhesive composition was dried to form a pressure-sensitive adhesive layer.
The pseudo-adhesive label according to Example 1 was produced by laminating the pressure-sensitive adhesive layer on the release paper and the pseudo-adhesive layer on the base material. The pseudo-adhesive label according to Example 1 provided a base material, a pseudo-adhesive layer, an adhesive layer, and a release paper in this order.

(Example 2)
The pseudo-adhesive label according to Example 2 was produced in the same manner as in Example 1 except that the thickness of the thermoplastic resin layer in the production of the pseudo-adhesive label according to Example 1 was changed to 16 μm.

(Example 3)
The pseudo-adhesive label according to Example 3 was produced in the same manner as in Example 1 except that the extrusion temperature of the thermoplastic resin in the production of the pseudo-adhesive label according to Example 1 was changed to 270 ° C.

(Example 4)
Pseudo-adhesion according to Example 4 in the same manner as in Example 1 except that the thermoplastic resin used in the production of the pseudo-adhesive label according to Example 1 was changed to "Sumikasen L-405" manufactured by Sumitomo Chemical Co., Ltd. A label was made. "Sumikasen" is a registered trademark of Sumitomo Chemical Co., Ltd.

(Example 5)
The pseudo-adhesive label according to Example 5 was produced in the same manner as in Example 1 except that the blending amount of the tack fire in the production of the pseudo-adhesive label according to Example 1 was changed to 5.0 parts by mass.

(Example 6)
The pseudo-adhesive label according to Example 6 was produced in the same manner as in Example 1 except that the blending amount of the tack fire in the production of the pseudo-adhesive label according to Example 1 was changed to 2.5 parts by mass.

(Example 7)
The same as in Example 1 except that the extrusion temperature of the thermoplastic resin in the production of the pseudo-adhesive label according to Example 1 was changed to 280 ° C. and the temperature of the cooling water passing through the water-cooled roll was changed to 30 ° C. A pseudo-adhesive label according to Example 7 was produced.

(Example 8)
The pseudo-adhesive label according to Example 8 was produced in the same manner as in Example 1 except that the processing speed in the production of the pseudo-adhesive label according to Example 1 was changed to 60 m / min.

(Example 9)
The pseudo-adhesive label according to Example 9 was produced in the same manner as in Example 1 except that the thickness of the thermoplastic resin layer in the production of the pseudo-adhesive label according to Example 1 was changed to 12 μm.

(Comparative Example 1)
A pseudo-adhesive label according to Comparative Example 1 was produced in the same manner as in Example 1 except that the thickness of the thermoplastic resin layer in the production of the pseudo-adhesive label according to Example 1 was changed to 27 μm.

(Comparative Example 2)
The pseudo-adhesive label according to Comparative Example 2 was produced in the same manner as in Example 1 except that the tack fire was not blended in the pressure-sensitive adhesive layer in the production of the pseudo-adhesive label according to Example 1.

(Comparative Example 3)
The pseudo-adhesive label according to Comparative Example 3 was produced in the same manner as in Example 1 except that the temperature of the cooling water passing through the water-cooled roll in the production of the pseudo-adhesive label according to Example 1 was changed to 10 ° C.

(Comparative Example 4)
The pseudo-adhesive label according to Comparative Example 4 was produced in the same manner as in Example 1 except that the processing speed in the production of the pseudo-adhesive label according to Example 1 was changed to 200 m / min.

(Comparative Example 5)
A pseudo-adhesive label according to Comparative Example 5 was produced in the same manner as in Example 1 except that the extrusion temperature of the thermoplastic resin in the production of the pseudo-adhesive label according to Example 1 was changed to 280 ° C.

(Comparative Example 6)
The same as in Example 1 except that the extrusion temperature of the thermoplastic resin in the production of the pseudo-adhesive label according to Example 1 was changed to 280 ° C. and the temperature of the cooling water passing through the water-cooled roll was changed to 10 ° C. A pseudo-adhesive label according to Comparative Example 6 was produced.

[Evaluation of pseudo-adhesive label]
The prepared pseudo-adhesive label was evaluated as follows. The evaluation results are shown in Table 1.

(Crystallinity)
The crystallinity of the thermoplastic resin contained in the pseudo-adhesive layer was determined by a wide-angle X-ray diffraction method.
The pseudo-adhesive layer was peeled off from the base material, and the scattering intensity of the pseudo-adhesive layer alone was measured using an X-ray generator (RAD-3A type) manufactured by Rigaku Co., Ltd. The scattering intensity of [010] was measured with Cu-Kα rays. The crystallinity Xc was calculated based on the measured scattering intensity and the following formula (1). The unit of crystallinity is%.
(Crystallinity Xc) = (scattering intensity of crystal part) / (total scattering intensity) × 100 ... (1)

((Normal) Pseudo-adhesive strength)
The pseudo-adhesive force was measured according to the 180 ° peeling adhesive force measurement of JIS Z 0237: 2009. Specifically, first, the produced pseudo-adhesive label was fixed to the SUS plate using the pressure-sensitive adhesive layer of the pseudo-adhesive label itself. Then, the base material of the pseudo-adhesive label was peeled from the pseudo-adhesive layer under the conditions of a peeling speed of 0.3 m / min and a peeling angle of 180 °. The magnitude of the force (peeling force) required for this peeling was measured, and the measured peeling force was taken as the pseudo adhesive force. The unit of pseudo-adhesive force is mN / 50 mm.

((Time) pseudo adhesive strength)
The prepared pseudo-adhesive label was stored for 3 days under the conditions of 60 ° C. and 95% RH. After that, the pseudo-adhesive force was measured in the same manner as the method described in the above "(normal) pseudo-adhesive force". The pseudo-adhesive force of the pseudo-adhesive label that has been stored under such heating and humidification conditions is defined as "(time) pseudo-adhesive force" as opposed to the above-mentioned "(normal) pseudo-adhesive force".

(Measurement of thickness of pseudo-adhesive layer)
The thickness of the pseudo-adhesive layer alone obtained by peeling off the pseudo-adhesive layer laminated on the base material was measured. A constant pressure thickness measuring device (PG-02) manufactured by Teclock Co., Ltd. was used for measuring the thickness.

(Adhesive force)
The adhesive strength of the pseudo-adhesive label was measured according to the 180 ° peeling adhesive strength measurement of JIS Z 0237: 2009.
The pseudo-adhesive label was cut to a width of 25 mm, the release paper was peeled off from the pseudo-adhesive label, and the adhesive layer was attached to a polyethylene plate or a SUS # 360 plate as an adherend. The pseudo-adhesive label and the adherend were pressure-bonded by reciprocating a roller weighing 2 kg once on the pseudo-adhesive label attached to the adherend.
After crimping with a roller, 24 hours later, the pseudo-adhesive label was peeled off from the adherend at a peeling speed of 300 mm / min, and the adhesive strength was measured. All the steps in measuring the adhesive strength were carried out in an environment of 23 ° C. and 50% RH (relative humidity).

According to the pseudo-adhesive label according to Examples 1 to 9, the base material could be peeled off from the pseudo-adhesive layer without causing tearing of the base material. This is because the pseudo-adhesive labels according to Examples 1 to 9 have a pseudo-adhesive layer containing a thermoplastic resin having a crystallinity of 22.5% or less, and have a pseudo-adhesive force between the base material and the pseudo-adhesive layer. , (Normal) and (aging) are considered to be caused by 250 mN / 50 mm or more and 1500 mN / 50 mm or less. The amorphous portion of the pseudo-adhesive layer has a higher affinity with the tack fire than the crystalline portion, and the crystallinity is 22.5% or less, so that the tack fire that has migrated to the pseudo-adhesive layer is trapped. It is considered that the properties were effectively exhibited. In Examples 1 to 9, the crystallinity of the thermoplastic resin in the pseudo-adhesive layer was reduced to 22.5% or less by setting appropriate manufacturing conditions according to the thermoplastic resin used for the pseudo-adhesive layer. It is probable that it could be controlled.

Moreover, according to the pseudo-adhesive label according to Examples 1 to 9, it showed good adhesive force to polyethylene and SUS as an adherend. It is considered that this is because the pressure-sensitive adhesive layer contained the tack fire.

Therefore, according to the pseudo-adhesive label according to Examples 1 to 9, the base material and the pseudo-adhesive layer are adhered with an appropriate pseudo-adhesive force to suppress unintended peeling of the base material, and storage conditions for the pseudo-adhesive label. Regardless, it is considered that the base material can be easily peeled off from the pseudo-adhesive layer and tearing of the base material can be suppressed. Further, according to the pseudo-adhesive labels according to Examples 1 to 9, it is considered that the selectivity of the adherend is small and the unintentional peeling of the pseudo-adhesive label from the adherend can be suppressed.

On the other hand, with respect to the pseudo-adhesive labels according to Comparative Examples 1, 3, 4, 5 and 6, the base material was torn when the base material was peeled from the pseudo-adhesive layer in the (time) pseudo-adhesive force test. It is considered that this is because the crystallinity of the thermoplastic resin contained in the pseudo-adhesive layer exceeded 22.5%, so that the property of trapping the tack fire that had migrated to the pseudo-adhesive layer was not sufficiently exhibited. In the pseudo-adhesive label according to Comparative Examples 1, 3, 4, 5 and 6, in the (aging) pseudo-adhesive strength test, the tack fire was not sufficiently trapped in the amorphous portion, and the base material and the pseudo-adhesive layer were not sufficiently trapped. It is considered that it moved to the interface and the pseudo-adhesive force between the base material and the pseudo-adhesive layer showed a value exceeding 1700 mN / 50 mm.
Regarding the pseudo-adhesive label according to Comparative Example 2, the base material was not torn when the base material was peeled from the pseudo-adhesive layer. However, the adhesive strength to polyethylene and SUS was low. It is considered that this is because the pressure-sensitive adhesive layer of the pseudo-adhesive label according to Comparative Example 2 did not contain the tack fire. According to the pseudo-adhesive label according to Comparative Example 2, tearing of the base material can be suppressed, but the pseudo-adhesive label may be peeled off from the adherend during the delivery process or the like.

1 ... Pseudo-adhesive label, 10 ... Base material, 100 ... Adhesive, 20 ... Pseudo-adhesive layer, 30 ... Adhesive layer, A ... Interface, RL ... Peeling sheet.

Claims (7)

With the base material
Adhesive layer and
It has a pseudo-adhesive layer contained between the base material and the pressure-sensitive adhesive layer.
The pressure-sensitive adhesive layer contains a pressure-sensitive adhesive resin and
The pseudo-adhesive layer contains a thermoplastic resin having a crystallinity of 22.5% or less.
The crystallinity is a value calculated based on the scattering intensity measured by the wide-angle X-ray diffraction method.
The pseudo-adhesive layer is pseudo-adhesive to the base material.
A pseudo-adhesive label having a pseudo-adhesive force of the pseudo-adhesive layer on the base material of 250 mN / 50 mm or more and 1500 mN / 50 mm or less. In the pseudo-adhesive label according to claim 1.
The pressure-sensitive adhesive layer contains a base polymer and contains.
The content of the tackifier resin in the pressure-sensitive adhesive layer is 0.1 part by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the main agent polymer.
Pseudo-adhesive label. In the pseudo-adhesive label according to claim 1 or 2.
The thermoplastic resin having a crystallinity of 22.5% or less is a polyolefin resin.
Pseudo-adhesive label. In the pseudo-adhesive label according to any one of claims 1 to 3.
The adhesive strength of the pseudo-adhesive label in JIS Z 0237: 2009 is 6.0 N / 25 mm or more.
Pseudo-adhesive label. In the pseudo-adhesive label according to any one of claims 1 to 4.
The adhesive strength of the pseudo-adhesive label when polyethylene is used as an adherend is 5.0 N / 25 mm or more.
Pseudo-adhesive label. In the pseudo-adhesive label according to any one of claims 1 to 5.
The base material is a paper base material.
Pseudo-adhesive label. In the pseudo-adhesive label according to any one of claims 1 to 6.
In addition, it has a release sheet
The pressure-sensitive adhesive layer is attached to the release sheet.
Pseudo-adhesive label.

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