WO2022230837A1 - ラベル - Google Patents

ラベル Download PDF

Info

Publication number
WO2022230837A1
WO2022230837A1 PCT/JP2022/018796 JP2022018796W WO2022230837A1 WO 2022230837 A1 WO2022230837 A1 WO 2022230837A1 JP 2022018796 W JP2022018796 W JP 2022018796W WO 2022230837 A1 WO2022230837 A1 WO 2022230837A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
label
base layer
protective layer
pet bottle
Prior art date
Application number
PCT/JP2022/018796
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
彰 宮崎
直樹 大西
周平 植村
征矢 節田
博美 土屋
Original Assignee
株式会社フジシールインターナショナル
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社フジシールインターナショナル filed Critical 株式会社フジシールインターナショナル
Priority to JP2023517530A priority Critical patent/JPWO2022230837A1/ja
Publication of WO2022230837A1 publication Critical patent/WO2022230837A1/ja

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/08—Fastening or securing by means not forming part of the material of the label itself
    • G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

Definitions

  • the present invention relates to labels printed on molded products.
  • Patent Document 1 proposes a technique in which a heat-shrinkable label made of a plastic film (shrink label) is interposed in the overlapped portion of the heat-shrinkable label to adjust the welding strength so that the heat-shrinkable label can be easily peeled off.
  • the plastic label described above sometimes idles on the surface of the container. Although it is possible to prevent idling by adhering a plastic label to the surface of the container, in this case, there is a problem that the plastic label is difficult to peel off from the container.
  • One aspect of the present invention has been made in view of the above-mentioned conventional problems, and the purpose thereof is to provide a label having idling prevention performance and recycling performance.
  • a label according to one aspect of the present invention is a label printed on a molded product, comprising a base layer formed on the surface of the molded product, and a layer above the base layer a display layer containing ink formed, wherein the base layer is a peelable layer that can be peeled off from the surface by a peeling action, or a soluble layer having alkali solubility.
  • FIG. 1 is a side view showing a PET bottle according to Embodiment 1 of the present invention
  • FIG. 2 is a cross-sectional view showing the structure of the label shown in FIG. 1
  • FIG. FIG. 5 is a cross-sectional view showing the structure of a label included in a PET bottle according to Embodiment 2 of the present invention
  • FIG. 1 is a side view showing a PET bottle (label molded product) 1 according to this embodiment.
  • a PET bottle 1 includes a PET bottle body (molded product) 2 and a label 3.
  • a PET bottle body (molded product) 2 As shown in FIG. 1, a PET bottle 1 includes a PET bottle body (molded product) 2 and a label 3.
  • the PET bottle body 2 is a molded product on which the label 3 is printed.
  • the PET bottle body 2 is a container made of synthetic resin molded by blow molding, biaxial stretch blow molding, injection molding, or the like, using saturated polyester typified by polyethylene terephthalate as a raw material.
  • the molded product on which the label 3 is printed is not limited to the PET bottle body 2.
  • a container made of a synthetic resin molded article such as a polyester resin product, a polyolefin resin product, a vinyl chloride resin product, or a polystyrene resin product, or a container other than a synthetic resin molded product may be used.
  • various molded articles other than the container may be used.
  • the label 3 is printed on the PET bottle body 2.
  • the label 3 is printed in a cylindrical shape so as to cover the body of the PET bottle body 2 in the circumferential direction.
  • the label 3 is not limited to a cylindrical shape, and may be printed so as to cover part of the circumferential direction.
  • the label 3 Since the label 3 is printed on the PET bottle body 2, the label 3 does not idle on the surface of the PET bottle body 2. Further, the base layer of the label 3 can be peeled off from the PET bottle body 2 by a peeling operation such as pulling and peeling by hand. Therefore, after the PET bottle 1 is used, the label 3 can be easily separated and removed from the PET bottle main body 2 so that the PET bottle main body 2 can be recycled.
  • FIG. 2 is a cross-sectional view showing the structure of the label 3 shown in FIG.
  • the label 3 according to this embodiment includes a base layer 4, a display layer 5, and a protective layer 6.
  • the label 3 is a laminated label having a three-layer structure in which the base layer 4, the display layer 5, and the protective layer 6 are laminated on the surface 2a of the PET bottle body 2 in this order.
  • the base layer 4 is a primer layer formed on the surface 2 a of the PET bottle body 2 .
  • the base layer 4 is a peelable layer that is not adhered to the surface 2a of the PET bottle body 2 and can be peeled off from the surface 2a of the PET bottle body 2 by a peeling operation.
  • the peeling operation includes manually peeling the base layer 4, for example, pulling it off by hand or peeling it off using a tool such as a scraper.
  • the peeling operation includes peeling the base layer 4 by mechanical treatment or chemical treatment. That is, the base layer 4 can be peeled off from the surface 2a of the PET bottle body 2 manually, mechanically, chemically, or the like. Therefore, the label 3 can be separated and removed from the PET bottle body 2 .
  • the material of the base layer 4 is not particularly limited as long as the display layer 5 can be printed and a layer that can be peeled off from the surface 2a of the PET bottle body 2 by a peeling operation can be formed.
  • the base layer 4 can be composed of, for example, a latex layer using a water-based (aqueous) material such as latex.
  • a latex layer is formed by coating latex.
  • latex is, for example, polymer capable of radical polymerization such as polyisoprene dispersed as latex particles in an aqueous solvent.
  • a latex layer can be preferably formed by using polyisoprene latex, chlorosulfonated polyethylene latex, or the like.
  • the label 3 can be peeled off by pulling it by hand, for example, and the label 3 can be easily peeled off from the surface 2a of the PET bottle body 2. This eliminates the need for mechanical or chemical treatment for peeling off the label 3, making it possible to apply the PET bottle 1 to, for example, a recycling process in which the label 3 is peeled off by hand. In addition, regardless of whether the PET bottle 1 is used or not, the label 3 can be peeled off at the timing desired by the consumer.
  • Table 1 is a table showing an example of main physical properties of polyisoprene latex used as the material of the underlayer 4.
  • Table 2 is a table showing an example of main physical properties of the underlayer 4 formed using the polyisoprene latex shown in Table 1.
  • Polyisoprene latex having physical properties shown in Table 1, for example, can be used as the material of the underlayer 4 .
  • the base layer 4 having physical properties such as a 300% tensile stress of 0.3 MPa, a tensile stress at break of 0.4 MPa, and an elongation at break of 2000% is formed. can do.
  • the method for forming the underlying layer 4 is not particularly limited.
  • the base layer 4 can be formed by a coating method using a brush or a roller, a printing method using an inkjet, a blowing method using a spray or an airbrush, or a dipping method.
  • the spraying method is preferable because the material can be sprayed on a curved surface regardless of the shape of the surface 2a of the PET bottle body 2, and the material dries quickly.
  • the display layer 5 is a layer containing ink for displaying characters or patterns. In this embodiment, the display layer 5 is laminated on the underlying layer 4 .
  • the display layer 5 displays the name of the product contained in the PET bottle main body 2, the description, or the decoration.
  • the type of ink used as the material for the display layer 5 is not particularly limited, for example, water-based (water-based) ink can be preferably used.
  • the method of forming the display layer 5 is not particularly limited, but for example, the ink jet method is preferable because ink can be printed even on curved surfaces regardless of the shape of the surface 2a of the PET bottle body 2 .
  • the protective layer 6 is an overcoat layer formed on the top layer of the label 3 .
  • the protective layer 6 is laminated on the display layer 5 .
  • the display layer 5 can be protected.
  • the base layer 4 is made of a latex layer, there is tack (stickiness) peculiar to latex.
  • the material of the protective layer 6 is not particularly limited as long as it can form a layer capable of protecting the display layer 5 .
  • the protective layer 6 can contain water-based acrylic as a main component, for example.
  • the base layer 4 and the protective layer 6 are preferably made of a water-based material. Thereby, the underlying layer 4 and the protective layer 6 can be safely formed without using an organic solvent. Additives such as a lubricant may be added to the protective layer 6 for the purpose of imparting abrasion resistance or slipperiness, if necessary. Furthermore, the protective layer 6 may be transparent, colored or matte. In the case of matting, the protective layer 6 may be formed by adding a matting additive.
  • the method of forming the protective layer 6 is not particularly limited.
  • the protective layer 6 can be formed by a coating method, a printing method, a spraying method, a dipping method, or the like.
  • the spraying method is preferable because the material can be sprayed onto a curved surface regardless of the shape of the surface 2a of the PET bottle body 2, and the material dries quickly.
  • the display layer 5 is printed on the surface 2a of the PET bottle body 2 via the base layer 4, so the label 3 does not idle on the surface 2a of the PET bottle body 2 as in the conventional case.
  • the base layer 4 of the label 3 can be peeled off from the surface 2a of the PET bottle body 2 by a peeling operation such as pulling and peeling by hand. Therefore, the label 3 can be easily separated and removed from the PET bottle body 2 .
  • each of the base layer 4, the display layer 5, and the protective layer 6 it is preferable to adjust the material and thickness of each of the base layer 4, the display layer 5, and the protective layer 6 so that the specific gravity of the label 3 is less than 1.0. Since the specific gravity of the entire label 3 is less than 1.0, when the used PET bottle 1 is pulverized and thrown into water, the pulverized fragments of the label 3 float on the water surface. Therefore, the PET bottle body 2 and the label 3 can be easily separated.
  • the specific gravity of the underlying layer 4 is often less than 1.0, and the specific gravity of the protective layer 6 is often greater than 1.0.
  • the specific gravity of the latex which is the material of the underlayer 4
  • the protective layer 6 is mainly composed of acrylic resin
  • its specific gravity is often greater than 1.0. Therefore, in the label 3 , the thicknesses of the underlying layer 4 and the protective layer 6 are adjusted such that the thickness T1 of the underlying layer 4 is larger than the thickness T2 of the protective layer 6 .
  • the thickness of the base layer 4 and the thickness of the protective layer 6 in this manner, the specific gravity of the entire label 3 can be changed. Therefore, by making the thickness of the base layer 4 relatively larger than the thickness of the protective layer 6, it becomes easier to adjust the specific gravity of the entire label to less than 1.0.
  • the elongation at break of the underlying layer 4 is greater than the elongation at break of the protective layer 6 .
  • the elongation at break is a value that indicates the ductility at the time when the layer surface breaks when tensile drawing is performed.
  • the elongation at break of the underlying layer 4 is preferably 2500% or less, more preferably 700% or more and 2000% or less.
  • the breaking elongation of the protective layer 6 is preferably 250% or less. Since the elongation at break of the base layer 4 is relatively large, the adhesion of the base layer 4 to the surface 2a of the PET bottle body 2 is enhanced, and the base layer 4 can be easily peeled off from the surface 2a. On the other hand, since the elongation at break of the protective layer 6 is relatively small, the protective function of the protective layer 6 can be enhanced.
  • the method for manufacturing the PET bottle 1 includes a base layer forming process, a display layer forming process, and a protective layer forming process.
  • Base layer forming step the material (for example, latex) of the base layer 4 is sprayed onto the surface 2a of the PET bottle body 2 by, for example, a spraying method.
  • the base layer (latex layer) 4 is formed by drying and solidifying the sprayed material of the base layer 4 .
  • a light shielding layer may be formed on part or all of the surface 2a of the PET bottle main body 2 before the base layer forming step, if necessary.
  • the label 3 can be formed on the surface 2a of the PET bottle body 2 to which the light-shielding property has been imparted.
  • Display layer forming step Next, in the display layer forming step, an ink (for example, water-based ink, etc.) that will be the material of the display layer 5 is printed on the base layer 4 by, for example, an inkjet method. By drying the printed ink, a display layer 5 for displaying characters or patterns is formed.
  • an ink for example, water-based ink, etc.
  • the base layer 4 functions as a demand layer (primer layer) for the display layer 5 , making it easier to print the display layer 5 on the base layer 4 .
  • the material of the protective layer 6 for example, aqueous (water-based) acrylic
  • a protective layer 60 for protecting the display layer 5 is formed on the outermost layer of the label 3 .
  • the PET bottle having the label 3 formed on the surface 2a of the PET bottle body 2 is manufactured. 1 can be manufactured.
  • the label 3 according to the present embodiment is the label 3 printed on the PET bottle body 2, and includes the base layer 4 formed on the surface 2a of the PET bottle body 2 and a layer above the base layer 4.
  • the base layer 4 is a peeling layer that can be peeled off from the surface 2a by a peeling action.
  • the label 3 Since the label 3 is printed on the PET bottle main body 2, the label 3 does not idle on the surface 2a of the PET bottle main body 2 as in the conventional case.
  • the base layer 4 of the label 3 is a peelable layer that can be peeled off by a peeling operation such as pulling and peeling by hand, the label can be removed from the surface 2a of the PET bottle body 2. Therefore, the PET bottle body 2 can be recycled by separating and removing the label 3 from the PET bottle body 2 .
  • the label 3 is printed on the PET bottle main body 2, the label 3 can be neatly attached to a container having a shape that is difficult to follow with a conventional plastic label.
  • the amount of plastic used for manufacturing the label 3 can be reduced.
  • the excess label 3 is not generated. Therefore, the amount of plastic used for manufacturing the label 3 can be reduced.
  • the peeled label 3 is less bulky than a conventional plastic label, the volume of the label 3 when discarded can be reduced.
  • the label 3 has a three-layer structure.
  • the number of layers of the label 3 is not particularly limited. Another layer may be inserted between the base layer 4 and the display layer 5 or between the display layer 5 and the protective layer 6 in the label 3 .
  • Other layers include a shielding layer, a reflective layer, a gas barrier layer, a barrier coat layer, and the like.
  • the label 3 may have a structure that does not include the protective layer 6 . That is, the label 3 may have a two-layer structure in which the base layer 4 and the display layer 5 are formed on the surface 2a of the PET bottle body 2 in this order.
  • FIG. 3 is a cross-sectional view showing the structure of the label 30 included in the PET bottle 10 according to this embodiment.
  • the label 30 according to this embodiment mainly differs from the label 3 described above in that it includes an alkali-soluble underlayer 40 .
  • the label 30 according to this embodiment includes a base layer 40, a display layer 5, and a protective layer 60.
  • the label 30 is a laminated label having a three-layer structure in which the base layer 40, the display layer 5, and the protective layer 60 are laminated on the surface 2a of the PET bottle body 2 in this order.
  • the base layer 40 is a primer layer formed on the surface 2 a of the PET bottle body 2 .
  • the underlayer 40 is a soluble layer having alkali solubility that dissolves in an alkaline aqueous solution. Therefore, the base layer 40 is dissolved by the alkaline treatment of immersing the PET bottle 10 in an alkaline aqueous solution, and the label 30 can be separated and removed from the PET bottle body 2 .
  • the material of the base layer 40 is not particularly limited as long as the display layer 5 can be printed and it has alkali solubility.
  • As the material of the base layer 40 for example, an acrylic emulsion obtained by emulsifying and dispersing an acrylic resin in water can be used.
  • An acrylic emulsion is an emulsion obtained by dispersing an acrylic resin in an aqueous solvent.
  • the base layer 40 having alkali solubility can be formed by using an acrylic emulsion containing an acrylic resin as a main component.
  • Table 3 is a table showing an example of main physical properties of the acrylic emulsion used as the material of the base layer 40.
  • the display layer 5 can be printed and the underlayer 4 having alkali solubility can be suitably formed.
  • solvent-based transparent varnish can be used as the material of the base layer 40.
  • the base layer 40 formed using a solvent-based transparent varnish may have, for example, the following characteristics (1) to (4).
  • (1) Contains a first resin that is an acrylic acid copolymer resin having a first glass transition temperature.
  • the apparent acid value of the underlayer 40 is 40 mgKOH/g or more and 150 mgKOH/g or less.
  • the total content of the first resin and the second resin in the base layer 40 is 50 parts by mass or more and 95 parts by mass or less.
  • the underlayer 40 having good alkali solubility can be formed.
  • Table 4 is a table showing an example of an overview (type, manufacturer, product name, etc.) of components of the solvent-based transparent varnish used as the material of the base layer 40.
  • the acid number and glass transition temperature (Tg) are also given.
  • the solid content (%) is shown for components whose solid content is not 100% by mass.
  • two types of components A to G are a first resin and a second resin (or substitutes thereof).
  • each solvent-based transparent varnish can be produced.
  • Tables 5 and 6 show the components used, their blending ratios, and their content ratios.
  • the “mixing ratio” is the ratio (% by mass) of each component used in preparing the solvent-based transparent varnish
  • the “content ratio” is the base layer prepared using the solvent-based transparent varnish. 40, the content ratio of the solid content of each component. That is, the “mixing ratio” is calculated with the solvent contained in component A and component I included, and the "content ratio” is calculated with all the solvent removed.
  • the display layer 5 By forming the base layer 40 using the solvent-based transparent varnish produced at the mixing ratio shown in Table 5, the display layer 5 can be printed and the base layer 40 having alkali solubility can be suitably formed. can be done.
  • the method of forming the underlying layer 40 is not particularly limited.
  • the base layer 40 can be formed by a printing method, a spraying method, a transfer method, a coating method using a brush, or a dipping method.
  • the spraying method is preferable because the material can be sprayed on a curved surface regardless of the shape of the surface 2a of the PET bottle body 2, and the material dries quickly.
  • the protective layer 60 is an overcoat layer formed on the top layer of the label 30 . By forming the protective layer 60 on the uppermost layer of the label 30, the display layer 5 can be protected.
  • the material of the protective layer 60 is not particularly limited as long as it can form a layer capable of protecting the display layer 5 .
  • the protective layer 60 may have alkali solubility.
  • the base layer 40 and the protective layer 60 are dissolved by treating the PET bottle 10 with an alkali. Therefore, it becomes easier to separate and remove the label 30 from the PET bottle body 2 .
  • the material of the protective layer 60 may be one containing an acrylic resin as a main component. Thereby, both high alkali solubility and high abrasion resistance as the protective layer 60 can be achieved.
  • the protective layer 60 by using a water-based (aqueous) material such as an acrylic emulsion as the material of the protective layer 60, the amount of organic solvent used in the manufacturing process can be reduced, and the safety of the manufacturing site is ensured. Environmental load can be reduced.
  • a solvent-based material such as a solvent-based transparent varnish.
  • the method of forming the protective layer 60 is not particularly limited.
  • the protective layer 60 can be formed by a printing method, a spraying method, a dipping method, or the like.
  • the spraying method is preferable because the material can be sprayed on a curved surface regardless of the shape of the surface 2a of the PET bottle body 2, and the material dries quickly.
  • the display layer 5 is printed on the surface 2a of the PET bottle body 2 via the base layer 40, so the label 30 does not idle on the surface 2a of the PET bottle body 2 as in the conventional case.
  • the base layer 40 of the label 30 has alkali solubility. Therefore, the base layer 40 is dissolved by the alkaline treatment of immersing the PET bottle 10 in an alkaline aqueous solution, and the label 30 can be separated and removed from the PET bottle body 2 .
  • the method for manufacturing the PET bottle 10 includes a base layer forming process, a display layer forming process, and a protective layer forming process.
  • Base layer forming step the material of the base layer 40 (for example, acrylic emulsion) is sprayed onto the surface 2a of the PET bottle body 2 by, for example, a spraying method. By drying and solidifying the sprayed material of the base layer 40, the base layer 40 having alkali solubility is formed.
  • the material of the base layer 40 for example, acrylic emulsion
  • ink for example, water-based ink, etc.
  • the display layer 5 is printed on the base layer 40 by, for example, an inkjet method.
  • the display layer 5 for displaying characters or patterns is formed.
  • the material of the protective layer 60 eg, acrylic emulsion, etc.
  • the protective layer 60 for protecting the display layer 5 is formed on the outermost layer of the label 30 .
  • the PET bottle having the label 30 formed on the surface 2a of the PET bottle body 2 can be manufactured. 10 can be manufactured.
  • the label 30 according to the present embodiment is the label 30 printed on the PET bottle body 2, and includes the base layer 40 formed on the surface 2a of the PET bottle body 2 and the layers above the base layer 40. and an ink-containing display layer 5 formed on the base layer 40.
  • the underlayer 40 is a soluble layer having alkali solubility.
  • the label 30 Since the label 30 is printed on the PET bottle body 2, the label 30 does not idle on the surface 2a of the PET bottle body 2 as in the conventional case.
  • the base layer 40 of the label 30 is a soluble layer having alkali solubility
  • the label can be removed from the surface 2a of the PET bottle body 2 by dissolving the base layer 40 by alkali treatment. Therefore, the PET bottle body 2 can be recycled by separating and removing the label 30 from the PET bottle body 2 .
  • Table 6 is a table showing the laminated structures of Comparative Example 1 and Examples 1 to 14 used in this example, and their verification results.
  • Example 1 a base layer (thickness: 18 ⁇ m, elongation at break: 2000%) was formed using latex on a PET film, and a display layer was printed on the base layer.
  • a base layer (thickness: 18 ⁇ m, elongation at break: 2000%) was formed by using latex on a PET film, and after printing a display layer on the base layer, acrylic resin was further applied to the display layer.
  • An emulsion was used to form a protective layer (thickness: 8 ⁇ m).
  • Example 2 has a laminated structure in which a protective layer is added to the label of Example 1.
  • an acrylic emulsion was used on a PET film to form an underlayer (thickness: 8 ⁇ m, elongation at break: 10%), and a display layer was printed on the underlayer.
  • Example 4 an acrylic emulsion was used on a PET film to form a base layer (thickness: 8 ⁇ m, elongation at break: 10%), a display layer was printed on the base layer, and then the display layer A protective layer (thickness: 8 ⁇ m) was formed using an acrylic emulsion.
  • Example 4 has a laminated structure in which a protective layer is added to the label of Example 3.
  • Examples 5 to 8 only the thicknesses of the base layer and the protective layer formed using an acrylic emulsion were changed from the laminate structure of Example 4. Specifically, the thickness of each of the base layer and the protective layer formed using an acrylic emulsion was 4 ⁇ m in Example 5, 2 ⁇ m in Example 6, 1 ⁇ m in Example 7, and 0.5 ⁇ m in Example 8. and
  • Example 10 has a laminate structure in which a protective layer is added to the label of Example 9. Further, in Examples 11 to 13, only the thicknesses of the base layer and the protective layer formed using a solvent-based transparent varnish were changed from the laminate structure of Example 10. Specifically, the thickness of each of the base layer and the protective layer formed using solvent-based transparent varnish was 2 ⁇ m in Example 11, 1 ⁇ m in Example 12, and 0.5 ⁇ m in Example 13.
  • Example 14 a base layer (thickness: 3 ⁇ m) was formed on a PET film using a solvent-based transparent varnish, a display layer was printed on the base layer, and an acrylic emulsion was used for the display layer. to form a protective layer (thickness: 8 ⁇ m).
  • a #20 bar coater was used to apply a synthetic polyisoprene rubber latex, an alkali-soluble acrylic emulsion, or an alkali-soluble solvent-based transparent varnish to a PET film to form a base layer or a protective layer. formed.
  • the display layer was printed through the base layer formed using the alkali-soluble solvent-based transparent varnish, so the PET film on which the label was formed was immersed in an alkaline aqueous solution. The stratum dissolved and the label could be separated and removed.
  • Table 7 is a table showing the laminated structures of Comparative Example 2 and Examples 15 to 21 used in this example, and their verification results.
  • a display layer was formed using ink (IQ798 manufactured by General Co., Ltd.) without forming a base layer on the PET bottle (container), which is the target substrate. printed directly.
  • a base layer was formed on a PET bottle using latex, acrylic emulsion or solvent-based transparent varnish, and a display layer was printed on the base layer.
  • Example 15 a base layer (thickness: 20 ⁇ m, elongation at break: 2000%) was formed on a PET bottle using latex, and a display layer was printed on the base layer.
  • latex was used in a PET bottle to form a base layer (thickness: 20 ⁇ m, elongation at break: 2000%).
  • An emulsion was used to form a protective layer (thickness: 10 ⁇ m).
  • Example 16 has a laminate structure in which a protective layer is added to the label of Example 15.
  • Example 17 an acrylic emulsion was used on a PET bottle to form a base layer (thickness: 10 ⁇ m, breaking elongation: 10%), and a display layer was printed on the base layer.
  • Example 18 an acrylic emulsion was used on a PET bottle to form a base layer (thickness: 10 ⁇ m, elongation at break: 10%), a display layer was printed on the base layer, and then the display layer A protective layer (thickness: 10 ⁇ m) was formed using an acrylic emulsion.
  • Example 18 has a laminate structure in which a protective layer is added to the label of Example 17.
  • Example 19 a base layer (thickness: 4 ⁇ m) was formed on a PET bottle using a solvent-based transparent varnish, and a display layer was printed on the base layer. Further, in Example 20, a base layer (thickness: 4 ⁇ m) was formed on a PET bottle using a solvent-based transparent varnish, a display layer was printed on the base layer, and then a solvent-based transparent varnish was applied to the display layer. was used to form a protective layer (thickness: 4 ⁇ m). Further, in Example 21, a base layer (thickness: 4 ⁇ m) was formed on a PET bottle using a solvent-based transparent varnish, a display layer was printed on the base layer, and an acrylic emulsion was used for the display layer.
  • Example 20 has a laminate structure in which a protective layer formed using a solvent-based transparent varnish is added to the label of Example 19, and
  • Example 21 has a laminated structure in which an acrylic emulsion is used for the label of Example 19. It is a laminated structure in which a formed protective layer is added.
  • a PET bottle is rolled in a palette containing synthetic polyisoprene rubber latex, an alkali-soluble acrylic emulsion, or an alkali-soluble solvent-based transparent varnish, and the latex, acrylic emulsion, or solvent-based transparent varnish is applied to the PET bottle.
  • a base layer or a protective layer was formed by applying the
  • Example 15 As shown in “Results” in Table 7, in Comparative Example 2, the display layer was printed directly on the PET bottle, so the display layer could not be peeled off by hand.
  • the display layer since the display layer was printed through the base layer formed using latex, the label could be peeled off together with the base layer by pulling the label by hand.
  • the tack (stickiness) peculiar to latex was suppressed by forming a protective layer as the uppermost layer of the label.
  • the display layer was printed through the base layer formed using an alkali-soluble acrylic emulsion. It dissolved and the label could be separated and removed. Furthermore, in Examples 19 to 21, since the display layer was printed through the base layer formed using the alkali-soluble solvent-based transparent varnish, the PET bottle with the label formed thereon was immersed in the alkaline aqueous solution. The stratum dissolved and the label could be separated and removed.
  • Table 8 is a table showing the laminated structures of Comparative Example 3 and Examples 22 to 28 used in this example, and their verification results.
  • Example 22 a base layer (thickness: 20 ⁇ m, elongation at break: 2000%) was formed on a PP bottle using latex, and a display layer was printed on the base layer.
  • latex was used in a PP bottle to form a base layer (thickness: 20 ⁇ m, elongation at break: 2000%), a display layer was printed on the base layer, and then an acrylic An emulsion was used to form a protective layer (thickness: 10 ⁇ m).
  • Example 23 has a laminate structure in which a protective layer is added to the label of Example 22.
  • Example 24 an acrylic emulsion was used on a PP bottle to form a base layer (thickness: 8 ⁇ m, breaking elongation: 10%), and a display layer was printed on the base layer.
  • Example 25 an acrylic emulsion was used on a PP bottle to form a base layer (thickness: 8 ⁇ m, breaking elongation: 10%), a display layer was printed on the base layer, and then the display layer A protective layer (thickness: 10 ⁇ m) was formed using an acrylic emulsion.
  • Example 25 has a laminate structure in which a protective layer is added to the label of Example 24.
  • Example 26 a base layer (thickness: 4 ⁇ m) was formed on the PP bottle using solvent-based transparent varnish, and the display layer was printed on the base layer.
  • a solvent-based transparent varnish was used on a PP bottle to form a base layer (thickness: 4 ⁇ m), a display layer was printed on the base layer, and then a solvent-based transparent varnish was applied to the display layer. was used to form a protective layer (thickness: 3 ⁇ m).
  • Example 28 a base layer (thickness: 4 ⁇ m) was formed on a PP bottle using a solvent-based transparent varnish, a display layer was printed on the base layer, and an acrylic emulsion was used for the display layer.
  • Example 27 has a laminate structure in which a protective layer formed using a solvent-based transparent varnish is added to the label of Example 26, and
  • Example 28 has a laminated structure in which an acrylic emulsion is used in the label of Example 26. It is a laminated structure in which a formed protective layer is added.
  • the PP bottles are rolled in a pallet, and latex, acrylic emulsion, or solvent-based transparent varnish is applied to the PP bottles to form a base layer or a protective layer. formed.
  • Example 23 As shown in “Results” in Table 8, in Comparative Example 3, the display layer was printed directly on the PP bottle, so the display layer could not be peeled off by hand. On the other hand, in Examples 22 and 23, since the display layer was printed through the base layer formed using latex, the label could be peeled off together with the base layer by pulling the label by hand. Moreover, in Example 23, it was confirmed that the tack (stickiness) peculiar to latex was suppressed by forming a protective layer as the uppermost layer of the label.
  • the display layer was printed through the base layer formed using an alkali-soluble acrylic emulsion. It dissolved and the label could be separated and removed. Furthermore, in Examples 26 to 28, since the display layer was printed through the base layer formed using an alkali-soluble solvent-based transparent varnish, the PP bottle with the label formed thereon was immersed in an alkaline aqueous solution. The stratum dissolved and the label could be separated and removed.
  • Table 9 is a table showing the laminated structures of Comparative Example 4 and Examples 29 to 35 used in this example, and their verification results.
  • a display layer was formed using ink (IQ798 manufactured by General Co., Ltd.) without forming a base layer on the HDPE bottle (container), which is the target substrate. printed directly.
  • an underlayer was formed on the HDPE bottle using latex, acrylic emulsion or solvent-based transparent varnish, and the display layer was printed on the underlayer.
  • Example 29 a base layer (thickness: 20 ⁇ m, elongation at break: 2000%) was formed on an HDPE bottle using latex, and a display layer was printed on the base layer.
  • latex was used for an HDPE bottle to form a base layer (thickness: 20 ⁇ m, elongation at break: 2000%).
  • An emulsion was used to form a protective layer (thickness: 10 ⁇ m).
  • Example 30 has a laminate structure in which a protective layer is added to the label of Example 29.
  • Example 31 an underlayer (thickness: 8 ⁇ m, elongation at break: 10%) was formed on an HDPE bottle using an acrylic emulsion, and a display layer was printed on the underlayer.
  • Example 32 an acrylic emulsion was used on an HDPE bottle to form a base layer (thickness: 8 ⁇ m, elongation at break: 10%), a display layer was printed on the base layer, and then the display layer A protective layer (thickness: 10 ⁇ m) was formed using an acrylic emulsion.
  • Example 32 has a laminate structure in which a protective layer is added to the label of Example 31.
  • Example 33 a base layer (thickness: 4 ⁇ m) was formed on the HDPE bottle using solvent-based transparent varnish, and the display layer was printed on the base layer. Further, in Example 34, a base layer (thickness: 4 ⁇ m) was formed on an HDPE bottle using a solvent-based transparent varnish, a display layer was printed on the base layer, and then a solvent-based transparent varnish was applied to the display layer. was used to form a protective layer (thickness: 3 ⁇ m). In Example 35, a base layer (thickness: 4 ⁇ m) was formed on an HDPE bottle using a solvent-based transparent varnish, a display layer was printed on the base layer, and an acrylic emulsion was used for the display layer.
  • Example 34 has a laminate structure in which a protective layer formed by using a solvent-based transparent varnish is added to the label of Example 33
  • Example 35 has a laminated structure in which an acrylic emulsion is used in the label of Example 33. It is a laminated structure in which a formed protective layer is added.
  • the HDPE bottles are rolled in a pallet, and the latex, acrylic emulsion, or solvent-based transparent varnish is applied to the HDPE bottles so that the bottom layer is varnished. A stratum or protective layer was formed.
  • the display layer was printed through the base layer formed using an alkali-soluble acrylic emulsion. It dissolved and the label could be separated and removed. Furthermore, in Examples 33 to 35, since the display layer was printed through the base layer formed using an alkali-soluble solvent-based transparent varnish, the HDPE bottle with the label formed thereon was immersed in an alkaline aqueous solution. The stratum dissolved and the label could be separated and removed.
  • Table 10 is a table showing the laminated structures of Comparative Example 5 and Examples 36 to 39 used in this example, and their verification results.
  • Example 36 a base layer (thickness: 20 ⁇ m, elongation at break: 2000%) was formed on a PS bottle using latex, and a display layer was printed on the base layer.
  • a base layer (thickness: 20 ⁇ m, elongation at break: 2000%) was formed using latex on a PS bottle, and after printing a display layer on the base layer, acrylic resin was further applied to the display layer.
  • An emulsion was used to form a protective layer (thickness: 10 ⁇ m).
  • Example 37 has a laminate structure in which a protective layer is added to the label of Example 36.
  • Example 38 an acrylic emulsion was used on a PS bottle to form a base layer (thickness: 8 ⁇ m, breaking elongation: 10%), and a display layer was printed on the base layer.
  • Example 39 an acrylic emulsion was used on a PS bottle to form a base layer (thickness: 8 ⁇ m, elongation at break: 10%), a display layer was printed on the base layer, and then the display layer A protective layer (thickness: 10 ⁇ m) was formed using an acrylic emulsion.
  • Example 39 has a laminate structure in which a protective layer is added to the label of Example 38.
  • PS bottles are rolled in a pallet and a latex or acrylic emulsion is applied to the PS bottles to form a base layer or a protective layer.
  • PS polystyrene
  • PET polyethylene terephthalate
  • PP polypropylene
  • HDPE high density polyethylene
  • the display layer was printed through the base layer formed using an alkali-soluble acrylic emulsion. It dissolved and the label could be separated and removed.
  • a label according to aspect 1 of the present invention is a label to be printed on a molded product, comprising a base layer formed on the surface of the molded product, and an ink-containing display layer formed above the base layer. and, wherein the base layer is a peelable layer that can be peeled off from the surface by a peeling action, or a soluble layer having alkali solubility.
  • the label is printed on the molded product, so the label does not idle on the surface of the molded product as in the past.
  • the base layer of the label is a peeling layer or a soluble layer
  • the label can be peeled off from the surface of the molded product by a peeling action such as pulling it off by hand, or the label can be soluble by alkali treatment. Dissolving the layer allows the label to be removed from the surface of the molding. Therefore, the label can be separated from the molded product and the molded product can be recycled. Therefore, according to the above configuration, it is possible to realize a label having idling prevention performance and recycling performance.
  • the base layer may be the release layer
  • the release layer may be composed of a latex layer
  • the release layer is composed of the latex layer
  • the label can be peeled off by pulling it by hand, for example, and the label can be easily peeled off from the surface of the molded article.
  • the label according to aspect 3 of the present invention in aspect 2, further includes a protective layer formed as the uppermost layer of the label, wherein the breaking elongation of the underlying layer is greater than the breaking elongation of the protective layer. good too.
  • the display layer formed below the protective layer can be protected by the protective layer formed on the uppermost layer of the label.
  • the base layer since the elongation at break of the base layer is relatively large, the base layer can be easily peeled off from the surface of the molded article while enhancing the adhesion of the base layer to the surface.
  • the elongation at break of the protective layer since the elongation at break of the protective layer is relatively small, the protective function of the protective layer can be enhanced.
  • the specific gravity of the label may be less than 1.0, and the thickness thereof may be greater than the thickness of the protective layer.
  • the specific gravity of the entire label is less than 1.0, when the molded product with the label formed thereon is pulverized and then thrown into water, the pulverized label fragments float on the surface of the water. Therefore, according to the above configuration, it is possible to easily separate the molded product such as a PET bottle from the label. Also, due to the difference in the materials used, the specific gravity of the underlayer is often less than 1.0 and the specific gravity of the protective layer is often greater than 1.0. Therefore, the specific gravity of the entire label can be changed by adjusting the thickness of the base layer and the thickness of the protective layer. According to the above configuration, since the thickness of the base layer is relatively larger than the thickness of the protective layer, it becomes easier to adjust the specific gravity of the entire label to less than 1.0.
  • the label according to aspect 5 of the present invention is the label according to aspect 1, wherein the base layer is the soluble layer, further comprising a protective layer formed on the uppermost layer of the label, wherein the protective layer is an alkali It may be soluble.
  • the label can be easily separated and removed from the molded article by the alkali treatment.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
PCT/JP2022/018796 2021-04-27 2022-04-26 ラベル WO2022230837A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2023517530A JPWO2022230837A1 (enrdf_load_stackoverflow) 2021-04-27 2022-04-26

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-075315 2021-04-27
JP2021075315 2021-04-27

Publications (1)

Publication Number Publication Date
WO2022230837A1 true WO2022230837A1 (ja) 2022-11-03

Family

ID=83848116

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/018796 WO2022230837A1 (ja) 2021-04-27 2022-04-26 ラベル

Country Status (2)

Country Link
JP (1) JPWO2022230837A1 (enrdf_load_stackoverflow)
WO (1) WO2022230837A1 (enrdf_load_stackoverflow)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61143758A (ja) * 1984-12-17 1986-07-01 Kimoto & Co Ltd 遮光性マスキングフイルム
JPH0676968U (ja) * 1993-03-31 1994-10-28 冨士シール工業株式会社 プラスチツクラベルおよびプラスチツク容器
JPH11316548A (ja) * 1998-05-06 1999-11-16 Keiwa Inc アルミニウム蒸着ラベル
JP2000211240A (ja) * 1999-01-20 2000-08-02 Canon Inc インク受容層の剥離可能な記録シ―ト
JP2018052609A (ja) * 2016-09-30 2018-04-05 大日本印刷株式会社 容器およびその製造方法
US20200055081A1 (en) * 2018-08-20 2020-02-20 WilCraft Can, LLC Process for reusing printed cans

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61143758A (ja) * 1984-12-17 1986-07-01 Kimoto & Co Ltd 遮光性マスキングフイルム
JPH0676968U (ja) * 1993-03-31 1994-10-28 冨士シール工業株式会社 プラスチツクラベルおよびプラスチツク容器
JPH11316548A (ja) * 1998-05-06 1999-11-16 Keiwa Inc アルミニウム蒸着ラベル
JP2000211240A (ja) * 1999-01-20 2000-08-02 Canon Inc インク受容層の剥離可能な記録シ―ト
JP2018052609A (ja) * 2016-09-30 2018-04-05 大日本印刷株式会社 容器およびその製造方法
US20200055081A1 (en) * 2018-08-20 2020-02-20 WilCraft Can, LLC Process for reusing printed cans

Also Published As

Publication number Publication date
JPWO2022230837A1 (enrdf_load_stackoverflow) 2022-11-03

Similar Documents

Publication Publication Date Title
JP6210991B2 (ja) 筒状シュリンクラベル及びその製造方法
US9827746B2 (en) Heat-shrinkable multilayer film and heat shrinkable label
AU689122B2 (en) Uniaxially oriented label film with compatibilizer
US10662349B2 (en) Shrink wrap label coating to facilitate recycling
WO2015093405A1 (ja) 容器用印刷フィルム及びその製造方法
US20030008082A1 (en) Labels with removable section for in-mold production of in-mold labeled molded containers
EP2657016A1 (en) Heat shrinkable multilayer film and heat shrinkable label
EP3187334B1 (en) Heat-shrinkable multilayer film and heat-shrinkable label
JP4568743B2 (ja) 熱収縮性多層フィルム及び熱収縮性ラベル
JP6503726B2 (ja) 容器用印刷フィルム及びその製造方法
WO2015118212A1 (en) Linerless washable label, apparatus and method for preparing a label
JP2019157133A (ja) 剥離コーティングを有する二軸延伸ポリエステルフィルム及びその製造方法ならびにその使用
WO2022230837A1 (ja) ラベル
US20030203166A1 (en) Shrinkable polymeric labels
EP3986711B1 (en) Recyclable film and packaging
JP2007211200A (ja) プラスチックフィルム塗工用活性エネルギー線硬化性樹脂組成物およびその用途
WO2015118213A1 (en) Method for preparing a label web and labels obtained with said method
JP2006044179A (ja) 熱収縮性積層フィルム及びそれからなるラベルを装着した容器
JP4451071B2 (ja) プラスチックラベルおよびプラスチック容器
WO2018187203A1 (en) Shrink wrap label coating to facilitate recycling
WO2015118211A1 (en) Washable label, method and apparatus for preparing said label
WO2015118210A1 (en) Washable label, method and apparatus for preparing said label
JP2014048564A (ja) 熱収縮性回転防止ラベル及び炭酸飲料用容器
JP3145133B2 (ja) クーポン券付インモールド用ラベル
KR101503791B1 (ko) 폴리에스테르계 증착필름

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22795750

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023517530

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22795750

Country of ref document: EP

Kind code of ref document: A1