Tape and container with tape

Abstract

There is provided a tape, including an engagement portion and a base in a cross-section thereof, the base including a first surface and a second surface, the engagement portion protruding from the first surface, the second surface positioned on a side opposite to the engagement portion, the tape including: a first resin portion formed of a first resin composition containing a fossil fuel-derived resin as a main component, the first resin portion at least partially covering the first surface in the cross-section of the tape; and a second resin portion formed of a second resin composition containing a biomass resin as a main component, the second resin portion constituting a portion other than the first resin portion.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] The entire disclosure of Japanese Patent Application No. 2025-010581 filed Jan. 24, 2025 and Japanese Patent Application No. 2025-255457 filed Dec. 16, 2025 is expressly incorporated by reference herein.TECHNICAL FIELD

[0002] The present invention relates to a tape and a container with a tape.BACKGROUND ART

[0003] In recent years, from the viewpoints of reducing environmental load and achieving carbon neutrality, replacing fossil fuel-derived resins with biomass resins has become widespread. For example, Literature 1 (JP 2022-143291 A) and Literature 2 (JP 2022-116864 A) disclose a tape or zipper tape that can include a biomass resin such as bio-polyethylene.

[0004] However, as the proportion of biomass resin contained in the resin used for members such as tapes increases, tackiness tends to occur on the surfaces of the members. This tackiness may, for example, cause resistance when the tape is attached to a film of a container body in a bag-making process, thereby resulting in deterioration in the appearance of the product, or may cause adhesion of the contents to an inner side of the zipper tape, thereby resulting in a decrease in functionality during opening and closing.SUMMARY OF THE INVENTION

[0005] An object of the invention is to provide a tape and a container with a tape capable of reducing tackiness of a surface while ensuring a content of biomass resin, the tape including a portion formed of a biomass resin.

[0006] [1] A tape, including an engagement portion and a base in a cross-section thereof, the base including a first surface and a second surface, the engagement portion protruding from the first surface, the second surface positioned on a side opposite to the engagement portion, the tape including: a first resin portion formed of a first resin composition containing a fossil fuel-derived resin as a main component, the first resin portion at least partially covering the first surface in the cross-section of the tape; and a second resin portion formed of a second resin composition containing a biomass resin as a main component, the second resin portion constituting a portion other than the first resin portion.

[0007] [2] The tape according to [1], in which the first resin portion entirely covers a portion of the first surface other than the engagement portion.

[0008] [3] The tape according to [1] or [2], in which the first resin portion includes a portion covering the first surface and a portion covering an end surface of the base.

[0009] [4] The tape according to any one of [1] to [3], in which the first resin portion further includes a portion at least partially covering the second surface.

[0010] [5] The tape according to any one of [1] to [4], in which the second resin portion includes a portion constituting an entirety of the engagement portion.

[0011] [6] The tape according to any one of [1] to [4], in which the second resin portion includes a portion constituting a core of the engagement portion, and the first resin portion includes a portion covering the first surface and a portion covering the core of the engagement portion.

[0012] [7] The tape according to any one of [1] to [4], in which the first resin portion includes a portion covering the first surface and a portion constituting an entirety of the engagement portion.

[0013] [8] The tape according to any one of [1] to [7], in which the biomass resin includes bio-polyethylene.

[0014] [9] The tape according to any one of [1] to [8], in which the fossil fuel-derived resin includes polyethylene.

[0015]

[10] The tape according to [9], in which the polyethylene has a density in a range from 900 kg / m3 to 940 kg / m3.

[0016]

[11] The tape according to [9] or

[10] , in which the polyethylene has a melt flow rate in a range from 0.5 g / 10 min to 15 g / 10 min.

[0017]

[12] The tape according to any one of [1] to

[11] , in which a portion of the first resin portion covering the first surface has a thickness of 10 μm or more.

[0018]

[13] The tape according to any one of [1] to

[12] , further including a third resin portion constituting a seal layer, the seal layer at least partially covering the second surface.

[0019]

[14] The tape according to any one of [1] to

[13] , in which the first resin portion includes a portion covering the first surface and a protrusion protruding from the portion covering the first surface.

[0020]

[15] A pair of tapes including a first tape and a second tape, a cross-section of the first tape including a first engagement portion and a first base including a first surface and a second surface, the first engagement portion protruding from the first surface, the second surface positioned on a side opposite to the first engagement portion, a cross-section of the second tape including a second engagement portion pairing with the first engagement portion and a second base including a third surface and a fourth surface, the second engagement portion protruding from the third surface, the fourth surface positioned on a side opposite to the second engagement portion, the pair of tapes including: first resin portions formed of a first resin composition containing a fossil fuel-derived resin as a main component, the first resin portions at least partially covering the first surface in the cross-section of the first tape and the third surface in the cross-section of the second tape; and second resin portions formed of a second resin composition containing a biomass resin as a main component, the second resin portions constituting portions other than the first resin portions.

[0021]

[16] A container with a tape, the container including: a container body; and the pair of tapes according to

[15] , in which the pair of tapes is attached to the container body such that the first surface of the first tape faces the third surface of the second tape.

[0022] According to the above configuration, since fossil fuel-derived resin results in a less tacky surface than biomass resin, providing the first resin portion prevents the surface of the base on a side close to the engagement portion from being tacky, thus preventing deterioration in the appearance of the product due to resistance during bag making and a decrease in functionality of a zipper tape due to adhesion of the contents. Further, the tape as a whole has a high proportion of the second resin portion, ensuring the content of the biomass resin.BRIEF DESCRIPTION OF DRAWINGS

[0023] FIG. 1 illustrates an exemplary tape according to an exemplary embodiment of the invention.

[0024] FIG. 2 illustrates another exemplary tape according to the exemplary embodiment of the invention.

[0025] FIG. 3 illustrates still another exemplary tape according to the exemplary embodiment of the invention.

[0026] FIG. 4 schematically illustrates a further exemplary tape according to the exemplary embodiment of the invention.

[0027] FIG. 5 schematically illustrates a still further exemplary tape according to the exemplary embodiment of the invention.

[0028] FIG. 6 schematically illustrates a still further exemplary tape according to the exemplary embodiment of the invention.

[0029] FIG. 7 schematically illustrates a still further exemplary tape according to the exemplary embodiment of the invention.

[0030] FIG. 8 schematically illustrates a still further exemplary tape according to the exemplary embodiment of the invention.

[0031] FIG. 9 schematically illustrates a still further exemplary tape according to the exemplary embodiment of the invention.DETAILED DESCRIPTION

[0032] Referring to the accompanying drawings, a preferred exemplary embodiment of the invention will be described in detail. Components having substantially the same functional configuration are denoted by the same reference numeral herein and in the drawings, and redundant description thereof will be omitted.

[0033] Herein, a biomass resin is a renewable organic resource as a raw material, specifically, a polymer material made from substances derived from biomass resources such as plants, and refers to one also called biomass plastic. Specific examples of the biomass resin include bio-polyethylene and bio-polypropylene. A fossil fuel-derived resin refers to a polymer material made from substances derived from fossil fuels, such as oil. When the term polyethylene, polypropylene, or the like is used alone, it is intended to mean polyethylene, polypropylene, or the like derived from fossil fuels.

[0034] Herein, the main component of a resin composition refers to a component having the highest content among the components of the resin composition. The resin composition may contain only the main component, or may contain, in addition to the main component, one or more other components. The main component of the resin composition can be identified, for example, by infrared spectroscopy (IR). Unless otherwise specified, the content of the component(s) of the resin composition is expressed in mass % relative to the total resin composition. The fact that the main component of the resin composition is a biomass resin can be confirmed, for example, by determining that the biomass content is 70% or more as measured, for example, in accordance with ASTM D6866. From the perspective of reducing environmental impact, the biomass content of the biomass resin is preferably 80% or more, and more preferably 90% or more.

[0035] FIG. 1 illustrates an exemplary tape according to the exemplary embodiment of the invention. In the illustrated example, a tape 20 is a zipper tape including engagement portions 21A and 21B. The tape 20 is attached to a film 10 of a container body to constitute a container 1 with a tape. The tape 20 includes a first tape 20A and a second tape 20B. The cross-section of the first tape 20A includes the engagement portion 21A and a base 22A. The cross-section of the second tape 20B includes the engagement portion 21B and a base 22B. The engagement portion 21A has a male profile, the engagement portion 21B has a female profile, and the male engagement portion 21A pairs with the female engagement portion 21B. The invention is not limited to this example, and the engagement portions may have any profile such as a hook type.

[0036] In the first tape 20A, the base 22A has a first surface from which the engagement portion 21A protrudes and a second surface positioned on a side opposite to the engagement portion 21A. The first tape 20A includes a first resin portion(s) 201A, a second resin portion 202A, and a third resin portion 203A. The first resin portion 201A partially covers the first surface of the base 22A. The second resin portion 202A constitutes another portion of the base 22A and the engagement portion 21A. The third resin portion 203A constitutes a seal layer that covers the second surface of the base 22A. Similarly, the second tape 20B includes a first resin portion(s) 201B, a second resin portion 202B, and a third resin portion 203B. The first resin portion 201B partially covers a first surface of the base 22B (surface from which the engagement portion 21B protrudes). The second resin portion 202B constitutes another portion of the base 22B and the engagement portion 21B. The third resin portion 203B constitutes a seal layer that covers a second surface of the base 22B (surface on a side opposite to the engagement portion 21B).

[0037] The first resin portion 201A, the second resin portion 202A, and the third resin portion 203A of the first tape 20A will be described below. The same applies to the first resin portion 201B, the second resin portion 202B, and the third resin portion 203B of the second tape 20B.

[0038] In the first tape 20A, the main component of a first resin composition constituting the first resin portion 201A is a fossil fuel-derived resin. The main component of the second resin portion 202A is a biomass resin. The fossil fuel-derived resin is exemplified by polyethylene, and the biomass resin is exemplified by bio-polyethylene. The invention, however, is not limited to these examples.

[0039] In the first tape 20A, a surface of the base 22A on a side close to the engagement portion 21A, the surface being constituted by the second resin portion 202A containing a biomass resin as the main component, is partially covered by the first resin portion 201A containing a fossil fuel-derived resin as the main component. Fossil fuel-derived resin results in a less tacky surface than biomass resin. Thus, providing the first resin portion 201A prevents the surface of the base 22A on the side close to the engagement portion 21A from being tacky, thus preventing, for example, deterioration in the appearance of the product due to resistance during bag making and a decrease in functionality of a zipper tape due to adhesion of the contents. Further, the first resin portion 201A is disposed only on the surface of the base 22A. Thus, the first tape 20A as a whole has a high proportion of the second resin portion 202A, ensuring the content of the biomass resin.

[0040] The thickness of a portion of the first resin portion 201A that covers the surface of the base 22A on the side close to the engagement portion 21A is, for example, 10 μm or more, preferably 20 μm or more, and more preferably 30 μm or more. Although the upper limit thereof is not particularly limited, in order to ensure the content of the biomass resin, the thickness is, for example, 100 μm or less, preferably 80 μm or less, and more preferably 50 μm or less. In a case where the fossil fuel-derived resin serving as the main component of the first resin portion 201A is polyethylene, the density of the polyethylene is preferably in a range from 900 kg / m3 to 940 kg / m3, and the melt flow rate thereof is preferably in a range from 0.5 g / 10 min to 15 g / 10 min.

[0041] The first tape 20A and the second tape 20B as described above are respectively attached to a first surface 111A and a second surface 111B of the film 10 of the container body. The first surface 111A faces the second surface 111B. The first tape 20A and the second tape 20B are respectively bonded to the first surface 111A and the second surface 111B via the seal layers covering the respective second surfaces of the tapes 20A and 20B. Thus, the first surface of the first tape 20A (surface from which the engagement portion 21A protrudes) faces the first surface of the second tape 20B (surface from which the engagement portion 21B protrudes) with the tapes 20A and 20B being attached to the film 10. As described above, the tape alone is capable of preventing deterioration in the appearance of the product due to resistance during bag making and a decrease in functionality due to adhesion of the contents in the exemplary embodiment. Furthermore, as in this example, the surface of the first tape 20A and the surface of the second tape 20B facing each other in the container 1 with the tape are prevented from being tacky, which makes it possible to prevent a decrease in functionality that may otherwise be caused by the tackiness of these surfaces.

[0042] As described above, in the first tape 20A, the third resin portion 203A constitutes the seal layer and the base 22A is bonded to the first surface 111A of the film 10 via the seal layer. When the first tape 20A is bonded to the first surface 111A by heat sealing or ultrasonic sealing, the third resin portion 203A is formed, for example, of a resin composition containing polyethylene as the main component, the polyethylene having a density in a range from 850 kg / m3 to 905 kg / m3. The invention, however, is not limited thereto. The third resin portion 203A may be an adhesive layer (layer including adhesive). It should be noted that the first surface 111A can be directly bonded to the second resin portion 202A (or the first resin portion in other examples described later) constituting the second surface (surface on the side opposite to the engagement portion 21A) of the base 22A. Typically, the third resin portion 203A is provided to lower the temperature of the heat sealing for the purpose of preventing wrinkling appearance of the produced bag. The third resin portion thus need not be provided if not required, for example. The same applies to examples described below. The third resin portion may be omitted in an example in which the third resin portions 203A and 203B are illustrated. Alternatively, for example, for the purpose mentioned above, the third resin portion may be provided in an example in which no third resin portion is illustrated, such as FIGS. 4 to 9.

[0043] FIG. 2 illustrates another exemplary tape according to the exemplary embodiment of the invention. In the illustrated example, the first resin portion 201A of the first tape 20A and the first resin portion 201B of the second tape 20B entirely cover portions of the first surfaces of the respective bases 22A and 22B other than the engagement portions 21A and 21B (surfaces from which the engagement portions 21A and 21B protrude). Configurations other than the above are the same as those of the example described above with reference to FIG. 1. Entirely covering, by the first resin portions 201A and 201B, the portions of the first surfaces of the bases other than the engagement portions 21A and 21B further enhances the effect of reducing tackiness of these surfaces.

[0044] FIG. 3 illustrates still another exemplary tape according to the exemplary embodiment of the invention. In the illustrated example, there are formed ribbed protrusions 23A that protrude from the first resin portion 201A of the first tape 20A, and ribbed protrusions 23B that protrude from the first resin portion 201B of the second tape 20B. Specifically, the protrusions 23A and 23B protrude from portions of the bases 22A and 22B covering the first surfaces (surfaces from which the engagement portions 21A and 21B protrude). Providing the protrusions 23A and 23B in the first resin portions 201A and 201B that contain a fossil fuel-derived resin as the main component reduces a contact area between the first surface of the base 22A and the first surface of the base 22B or a contact area between these surfaces and a bag-making device or the contents. This makes it possible to further enhance the effect of preventing deterioration in the appearance of the product due to resistance during bag making or a decrease in functionality of a zipper tape due to adhesion of contents.

[0045] FIGS. 4 to 9 illustrate other exemplary tapes according to the exemplary embodiment of the invention. FIG. 4 schematically illustrates an example of the first tape 20A in which the first resin portion 201A entirely covers a portion of the base, which is the surface on the side close to the engagement portion 21A (first surface) other than the engagement portion 21A. The example in FIG. 4 is similar to the example in FIG. 2. Although only the first tape 20A is schematically illustrated in FIGS. 4 to 9, the second tape 20B can also be configured similarly to the first tape 20A. It should be noted that, also in the examples in FIGS. 4 to 9, the first resin portion 201A can partially cover the surface of the base on the side close to the engagement portion, as in the example illustrated in FIG. 1. Furthermore, also in the examples in FIGS. 4 to 9, protrusions protruding from the first resin portion 201A can be provided as in the example illustrated in FIG. 3.

[0046] In the example illustrated in FIG. 5, the first resin portion 201A includes a portion covering the surface of the base 22A on the side close to the engagement portion (first surface) and a portion contiguous with this portion that covers end surfaces of the base 22A. Covering the end surfaces of the base 22A by the first resin portion 201A allows more surfaces of the base 22A to be covered by the first resin portion 201A, resulting in the effect obtained by the reduction in surface tackiness.

[0047] In the example illustrated in FIG. 6, the engagement portion 21A includes a core 212A that is constituted by the second resin portion 202A and a portion 211A that is constituted by the first resin portion 201A covering the core. In the example illustrated in FIG. 7, the entirety of the engagement portion 21A is constituted by the first resin portion 201A. The configuration in which the surface of the engagement portion 21A is also constituted by the first resin portion 201A enhances the effect obtained by the reduction in surface tackiness.

[0048] In other examples, the entirety of the engagement portion 21A may be constituted by the second resin portion 202A. Also in this configuration, since a contact area between the engagement portion 21A and a bag making device or the contents is relatively small, the effect obtained by the reduction in surface tackiness is achievable as long as the first resin portion 201A covers the surface of the base 22A on the side close to the engagement portion (first surface). Furthermore, the content of the biomass resin can be further increased.

[0049] In the examples illustrated in FIGS. 8 and 9, in addition to the portions covering the end surfaces and the surface of the base 22A on the side close to the engagement portion (first surface), the first resin portion 201A includes a portion covering a surface of the base 22A on a side opposite to the engagement portion (second surface). These portions may be contiguous with one another in cross section as in the illustrated examples, or may be separated from one another. Covering the second surface by the first resin portion 201A can prevent, for example, defects that may otherwise be caused by surface tackiness during a conveyance step before the attachment of the tape 20 to the container body.

[0050] FIGS. 8 and 9 each illustrate the example in which the surface of the engagement portion 21A is constituted by the first resin portion 201A as in the examples FIGS. 6 and 7. Also in other examples in which the entirety of the engagement portion 21A is constituted by the second resin portion 202A, the first resin portion 201A can cover the second surface of the base 22A.

[0051] Then, Example of the invention will be described below. As shown in Table 1 below, a three-layer tape including a surface layer (the first resin portion in the above description), a core layer (the second resin portion), and a seal layer (the third resin portion) was produced as Example. Further, substantially two-layer tapes, in which the surface layer and the core layer were formed of the same resin composition, were produced as Comparative Examples. In Table 1, “PE” refers to fossil fuel-derived polyethylene, and “Bio-PE” refers to bio-polyethylene. The tapes in Example and Comparative Examples were stored for eight months, including the summer months (June to September), and the surface tackiness was evaluated by touch. Furthermore, bags with the tapes in Example and Comparative Examples were produced by BH-60HV, which was a three-side-seal automatic pouch making machine manufactured by TOTANI CORPORATION, and the occurrence of wrinkles in the tape seal portions was checked. As a laminate film, PET #12 / / LL #50 was used, and the bags with the tapes in Example and Comparative Examples were produced under the conditions: sealing time 0.4 seconds, acceleration 0.6 G, waiting time 0 seconds, feed length 160 mm, and sealing temperature upper side 135 degrees C. / lower side 130 degrees C. Regarding the evaluation of surface tackiness and wrinkles in the produced bags, a tape including a surface layer, core layer, and seal layer that were formed of fossil fuel-derived polyethylene was used as a standard product. The evaluation was rated as OK when the surface tackiness and wrinkles in the produced bag were equivalent to those of the standard product, and rated as NG when the surface tackiness was stronger than that of the standard product and the produced bag had many wrinkles. In Example in which the surface layer was formed of fossil fuel-derived polyethylene, both the surface tackiness and wrinkles in the produced bag were equivalent to those of the standard product. In Comparative Examples in which the surface layer and the core layer were formed of the same resin composition containing bio-polyethylene as the main component, the surface tackiness was stronger than that of the standard product, and the produced bags had more wrinkles than the standard product.TABLE 1DensityComparativeComparativeMaterial[kg / m3]Example 1Example 1Example 2Surface layerPE913100% 0%30%(ThicknessBio-PE916 0%100%70%30 μm)Core layerPE913 0% 0%30%(ThicknessBio-PE916100%100%70%100 μm)Seal layerPE903100%100%100% (Thickness20 μm)Surface——OKNGNGtackinessWrinkles——OKNGNGin producedbag

Claims

1. A tape, including an engagement portion and a base in a cross-section thereof, the base including a first surface and a second surface, the engagement portion protruding from the first surface, the second surface positioned on a side opposite to the engagement portion, the tape comprising:a first resin portion formed of a first resin composition containing a fossil fuel-derived resin as a main component, the first resin portion at least partially covering the first surface in the cross-section of the tape; anda second resin portion formed of a second resin composition containing a biomass resin as a main component, the second resin portion constituting a portion other than the first resin portion.

2. The tape according to claim 1, wherein the first resin portion entirely covers a portion of the first surface other than the engagement portion.

3. The tape according to claim 1, wherein the first resin portion includes a portion covering the first surface and a portion covering an end surface of the base.

4. The tape according to claim 1, wherein the first resin portion further includes a portion at least partially covering the second surface.

5. The tape according to claim 1, wherein the second resin portion includes a portion constituting an entirety of the engagement portion.

6. The tape according to claim 1, wherein the second resin portion includes a portion constituting a core of the engagement portion, andthe first resin portion includes a portion covering the first surface and a portion covering the core of the engagement portion.

7. The tape according to claim 1, wherein the first resin portion includes a portion covering the first surface and a portion constituting an entirety of the engagement portion.

8. The tape according to claim 1, wherein the biomass resin includes bio-polyethylene.

9. The tape according to claim 1, wherein the fossil fuel-derived resin includes polyethylene.

10. The tape according to claim 9, wherein the polyethylene has a density in a range from 900 kg / m3 to 940 kg / m3.

11. The tape according to claim 9, wherein the polyethylene has a melt flow rate in a range from 0.5 g / 10 min to 15 g / 10 min.

12. The tape according to claim 1, wherein a portion of the first resin portion covering the first surface has a thickness of 10 μm or more.

13. The tape according to claim 1, further comprising a third resin portion constituting a seal layer, the seal layer at least partially covering the second surface.

14. The tape according to claim 1, wherein the first resin portion includes a portion covering the first surface and a protrusion protruding from the portion covering the first surface.

15. A pair of tapes including a first tape and a second tape, a cross-section of the first tape including a first engagement portion and a first base including a first surface and a second surface, the first engagement portion protruding from the first surface, the second surface positioned on a side opposite to the first engagement portion, a cross-section of the second tape including a second engagement portion pairing with the first engagement portion and a second base including a third surface and a fourth surface, the second engagement portion protruding from the third surface, the fourth surface positioned on a side opposite to the second engagement portion, the pair of tapes comprising:first resin portions formed of a first resin composition containing a fossil fuel-derived resin as a main component, the first resin portions at least partially covering the first surface in the cross-section of the first tape and the third surface in the cross-section of the second tape; andsecond resin portions formed of a second resin composition containing a biomass resin as a main component, the second resin portions constituting portions other than the first resin portions.

16. A container with a tape, the container comprising:a container body; andthe pair of tapes according to claim 15, whereinthe pair of tapes is attached to the container body such that the first surface of the first tape faces the third surface of the second tape.

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