Packaging products

Abstract

To provide packaging products that are easily recyclable and feature packaging film with high recyclability. [Solution] In a packaging product 1 comprising a pallet 2, a group of articles 3 stacked on the pallet 2, a packaging film 4, and a display label 5, the packaging film 4 is made of a stretchable, recyclable film and covers the group of articles 3 along its outer periphery. The display label 5 is affixed to a part of the side or top surface of the group of articles 3 covered with the packaging film 4, and is formed by laminating a pressure-sensitive adhesive layer 51, an intermediate substrate 52, a pseudo-adhesive layer 53, and a printing substrate 54 in this order from the side affixed to the packaging film 4. The intermediate substrate 52, the pressure-sensitive adhesive layer 51, and the pseudo-adhesive layer 53 are made of materials that can be recycled at the same time as the packaging film 4.

Description

Technical Field

[0001] The present invention relates to a packaged product.

Background Art

[0002] When transporting various parts and products such as automobile parts and precision machine parts, it is often the case that these items are loaded onto a pallet and transported by a forklift before and after handling. Usually, in order to protect the items loaded on the pallet and prevent the load from collapsing, the outer peripheral surface of the items is covered with a film (or sheet) such as a packaging stretch film to form a single package. As the stretch film, a polyolefin-based film, a polyester-based film, a polyvinyl chloride-based film, and a film having a multilayer structure in which these films are laminated are used. These film products are discarded by landfill or incineration after use.

[0003] In Patent Document 1, as an attempt to reduce the environmental load when film products are discarded as garbage, for example, a thin stretch film is disclosed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In recent years, there has been a growing social movement to collect used film products, such as stretch film, and utilize them as resources through reuse and material recycling. Recycling film products requires separating and collecting waste plastics, which are often composed of various plastic materials such as polyethylene (PE) and polypropylene (PP). Furthermore, stretch film used for packaging often has labels indicating the product name and lot number, and these labels must be removed when recycling the packaging materials. Many labels are made of thermal paper, and if they are not removed, a sorting process is required during recycling, and they can cause clogging and defects during pelletizing and film molding. While using film-based labels of the same type as the film product may reduce clogging, the inclusion of thermal coatings or printing can degrade recycling quality. Additionally, re-peelable labels present challenges such as the risk of peeling and difficulty in manual removal.

[0006] This invention has been made in view of the above circumstances, and aims to provide a packaging product equipped with a packaging film that can be easily recycled and has high recycling quality. [Means for solving the problem]

[0007] To solve the above problems, a first aspect of the present invention is a packaging product comprising a pallet, a group of articles placed on the pallet, a packaging film, and a display label, wherein the packaging film is made of a stretchable and recyclable film and covers the group of articles along its outer circumferential surface, the display label is affixed to a part of the side or top surface of the group of articles covered with the packaging film, and is formed by laminating a pressure-sensitive adhesive layer, an intermediate substrate, a pseudo-adhesive layer, and a printing substrate in this order from the side affixed to the packaging film, and the intermediate substrate, the pressure-sensitive adhesive layer, and the pseudo-adhesive layer are made of a material that can be recycled simultaneously with the packaging film.

[0008] A second aspect of the present invention is the packaging product according to the first aspect, wherein the printing substrate has a sorting mark indicating that the packaging film and the printing substrate can be disposed of separately.

[0009] A third aspect of the present invention is a packaging product according to the first or second aspect, wherein the printing substrate is provided with a half-cut that is arranged along one side of the printing substrate with a predetermined width from the circumferential edge, and the half-cut penetrates the printing substrate.

[0010] A fourth aspect of the present invention is a packaging product according to the first or second aspect, wherein the label has a tab at its peripheral edge, and the printing substrate of the label is peeled off the packaging film by pinching the tab and peeling the printing substrate of the label from the pseudo-adhesive layer.

[0011] A fifth aspect of the present invention is a packaging product according to the fourth aspect, wherein the tab portion forms a non-adhesive region where the packaging film and the pressure-sensitive adhesive layer are not adhered, and the display label is provided with a half-cut at the boundary between the non-adhesive region of the tab portion and the adhesive region that adheres to the pressure-sensitive adhesive layer, and the half-cut is configured to penetrate the pressure-sensitive adhesive layer, the intermediate substrate and the pseudo-adhesive layer without cutting the printing substrate.

[0012] A sixth aspect of the present invention is a method for recycling the packaging film of a packaging product according to the first or second aspect, comprising peeling the printing substrate of the display label from the packaging film and removing the packaging film from the group of articles. [Effects of the Invention]

[0013] According to the present invention, it is possible to obtain a packaging product that is easily recyclable and has a packaging film with high recyclability. [Brief explanation of the drawing]

[0014] [Figure 1] This is a schematic diagram of the packaging product of the present invention. [Figure 2] This is a schematic cross-sectional view of one embodiment of the packaging film in the packaging product of the present invention. [Figure 3] This is a schematic cross-sectional view of the process of peeling a label from a packaging film in one embodiment of the present invention. [Figure 4] This is a schematic diagram showing an example of a label to be affixed to a packaging film in one embodiment of the present invention. [Modes for carrying out the invention]

[0015] The following describes in detail embodiments for carrying out the present invention (hereinafter simply referred to as "this embodiment"). This embodiment is illustrative for explaining the present invention and is not intended to limit the present invention to the following content. The present invention can be carried out by modifying it as appropriate within the scope of its gist. In the drawings, the same reference numerals are used for the same elements, and redundant explanations are omitted. Also, unless otherwise specified, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios in the drawings are not limited to the ratios shown.

[0016] A packaging product according to one embodiment of the present invention will be described with reference to Figures 1 to 3. Figure 1 is a schematic diagram of the packaging product of the present invention. Figure 2 is a schematic cross-sectional view of one embodiment of the packaging film in the packaging product of the present invention. Figure 3 is a schematic cross-sectional view of the process of peeling a display label from the packaging film in one embodiment of the present invention.

[0017] In this specification, "pallet" means a loading platform for carrying goods for storing or transporting multiple items together.

[0018] <Packaged Products> As shown in FIG. 1, the packaged product 1 of this embodiment includes a pallet 2, a group of articles 3 placed on the pallet 2, a packaging film 4, and a display label 5. In this embodiment, articles are loaded onto the pallet 2 to form the group of articles 3. Along the outer peripheral surface of this group of articles 3, the packaging film 4 covers the group of articles 3.

[0019] (Pallet) As shown in FIG. 1, in this embodiment, it is preferable to load articles onto the pallet 2 to form the group of articles 3. By loading the group of articles 3 onto the pallet 2, it becomes possible to transport them with a forklift or a hand pallet truck.

[0020] The material of the pallet 2 may be any material that can transport the placed group of articles 3, and can be selected from materials such as wood, plastic, metal, cardboard, etc.

[0021] Note that in FIG. 1, the form of the pallet 2 shows a so-called flat pallet, but other forms of pallets may be used as long as the group of articles 3 can be transported, for example, box pallets, roll box pallets, post pallets, sheet pallets, etc. Also, the pallet 2 may be a mount for placing articles used in logistics.

[0022] (Group of articles) The group of articles 3 is, for example, various parts and products such as precision machine parts, etc., which are packaged in boxes or bags and grouped into one unit. In this embodiment, parts, etc. are packaged in boxes and loaded onto the pallet 2 to form the group of articles 3. On the other hand, the group of articles 3 may be packaged in bags, etc., and placed as a single unit without being stacked on the pallet 2.

[0023] (Packaging film) In this embodiment, the packaging film 4 is made of a recyclable film that is stretchable, such as a so-called stretch film. Examples of such films include plastic films, which can be selected from polyolefin films, polyester films, polyvinyl chloride films, or films having a multilayer structure by laminating these films.

[0024] The packaging film 4 is wrapped around the outer surface of the group of articles 3 placed on the pallet 2, covering and securing the entire group of articles 3. The packaging film 4 may also be in the form of a bag.

[0025] (Display label) The configuration of the display label 5 in this embodiment will be explained using Figures 2 and 3. In Figures 2 and 3, the width direction of the label is represented as X, and the thickness direction is represented as Z.

[0026] As shown in Figure 2, the display label 5 is formed by laminating a pressure-sensitive adhesive layer 51, an intermediate substrate 52, a pseudo-adhesive layer 53, and a printing substrate 54 on a release paper 6 in that order. The pressure-sensitive adhesive layer 51, intermediate substrate 52, and pseudo-adhesive layer 53 that make up the display label 5 are made from materials that can be recycled at the same time as the packaging film 4, as will be described later.

[0027] As shown in Figures 1 and 3, the label 5 is attached to a part of the side or top surface of the group of articles 3 by peeling off the release paper 6 and attaching the pressure-sensitive adhesive layer 51 to the packaging film 4.

[0028] Furthermore, as shown in Figure 4, the display label 5 has a tab 56 at its periphery. As will be described later, the printing substrate 54 of the display label 5 can be peeled off the packaging film 4 by pinching the tab 56 and peeling it off the pseudo-adhesive layer 53.

[0029] (Pressure-sensitive adhesive layer) The pressure-sensitive adhesive layer 51 is a layer for attaching the display label 5 to the packaging film 4, and is composed of, for example, an acrylic adhesive, a natural rubber adhesive, a synthetic rubber adhesive, or a silicone adhesive. Among these, acrylic adhesives and synthetic rubber adhesives are preferred from the viewpoint of ease of controlling adhesive strength and cost-effectiveness.

[0030] Examples of acrylic adhesives include solvent-based acrylic adhesives, water-based emulsion-type acrylic adhesives, and hot-melt-type acrylic adhesives. Examples of synthetic rubber adhesives include solvent-based synthetic rubber adhesives, water-based emulsion-type synthetic rubber adhesives, and hot-melt-type synthetic rubber adhesives.

[0031] The pressure-sensitive adhesive layer 51 may contain additives as needed. Examples of additives include fillers, softeners, thermo-light stabilizers, antioxidants, and crosslinking agents. Examples of fillers include zinc oxide, titanium dioxide, silica, calcium carbonate, and barium sulfate. Examples of softeners include process oils, liquid rubber, and plasticizers. Examples of thermo-light stabilizers include benzophenone-based stabilizers, benzotriazole-based stabilizers, and hindered amine-based stabilizers. Examples of antioxidants include anilide-based antioxidants, phenol-based antioxidants, phosphite-based antioxidants, and thioester-based antioxidants.

[0032] (Intermediate material) The intermediate substrate 52 is a layer that controls the thickness of the pseudo-adhesive layer 53, and the ease of peeling off the display label 5 can be adjusted by changing the thickness of the intermediate substrate 52. The intermediate substrate 52 may be formed from the same material as the pressure-sensitive adhesive layer 51 and the pseudo-adhesive layer 53.

[0033] (A pseudo-adhesive layer) The term "pseudo-adhesion" in the pseudo-adhesion layer 53 refers to an adhesion that can be easily peeled off at the interface between one layer and the other layer, or within the pseudo-adhesion layer 53, when bonded under specific conditions (for example, combination of materials, temperature range, and pressure), and does not exhibit re-adhesion or re-sticking properties after peeling.

[0034] In the display label 5 of this embodiment, for example, it can be peeled off at the interface between the printing substrate 54 as one layer and the pseudo-adhesive layer 53 as the other layer, and the interface-side surface of the printing substrate 54 and the interface-side surface of the pseudo-adhesive layer 53 do not exhibit re-adhesion or re-sticking properties after peeling. Even if peeling occurs within the pseudo-adhesive layer 53, the pseudo-adhesive layers 53 do not exhibit re-adhesion or re-sticking properties to each other. It is preferable that the pseudo-adhesive layer 53 is directly laminated on the printing substrate 54.

[0035] The pseudo-adhesive layer 53 can be made primarily of a thermoplastic resin, for example. Examples of thermoplastic resins that can be contained in the pseudo-adhesive layer 53 include polyolefin resins, polyester resins, and polyamide resins. The pseudo-adhesive layer 53 may contain one type of thermoplastic resin or two or more types.

[0036] The thermoplastic resin contained in the pseudo-adhesive layer 53 is preferably a polyolefin resin. A polyolefin resin is a polymer having at least one constituent unit derived from an olefin monomer. Examples of polyolefin resins include polyethylene resin, polypropylene resin, polybutene resin, ethylene-propylene copolymer, olefin elastomer (TPO), ethylene-vinyl acetate copolymer (EVA), ethylene-methyl methacrylate copolymer (EMMA), and olefin ternary copolymers such as ethylene-propylene-(5-ethylidene-2-norbornene).

[0037] Among these, the polyolefin resin is preferably at least one of the resins selected from the group consisting of ultra-low density polyethylene, low density polyethylene, polypropylene resin, and ethylene-vinyl acetate copolymer.

[0038] Furthermore, the density of the polyolefin resin is 900 kg / m³. 3 More than 920kg / m 3 A density of less than 920 kg / m³ is preferable. For example, a density of 920 kg / m³ is preferable. 3When using the high-density polyethylene described above, the printed substrate 54 becomes less likely to peel off.

[0039] (Printing base material) As the printing substrate 54, any printable or printable substrate can be used. Examples of the printing substrate 54 include paper, resin film, synthetic paper, metal foil, and laminated sheets obtained by laminating these in one or more layers. Examples of paper include thermal paper, thermal transfer paper, pressure-sensitive paper, inkjet paper, laser printer paper, kraft paper, fine paper, glassine paper, rayon paper, coated paper, and synthetic fiber paper. Examples of resin film include films made from polyester resin, polyvinyl chloride resin, polyvinylidene chloride resin, and polyolefin resin. The resin film may have a coating layer on the surface opposite to the pseudo-adhesive layer 53. Examples of synthetic paper include paper made primarily from polyester resin, polyvinyl chloride resin, polyvinylidene chloride resin, and polyolefin resin. The printing substrate 54 may be made of a material that can be detected by various detectors such as metal detectors and magnetic detectors in order to prevent it from being forgotten during the recycling of the packaging film 4. Examples of metal-detectable printing substrates 54 include laminated sheets made by laminating at least one of paper, resin film, and synthetic paper with metal foil.

[0040] Information printed on the printing substrate 54 may include, for example, the contents, quantity, and manufacturer of the items in item group 3. As shown in Figure 4, the printing substrate 54 has a sorting indicator 55 that indicates that the packaging film 4 and the printing substrate 54 can be disposed of separately. This sorting indicator 55 represents sorting information using characters, figures, pictograms, or images.

[0041] As shown in Figure 3, the printing substrate 54 can be peeled off at the interface between the printing substrate 54 and the pseudo-adhesive layer 53. Since the adhesive force between the printing substrate 54 and the pseudo-adhesive layer 53 is less than the adhesive force of the pressure-sensitive adhesive layer 51, the printing substrate 54 of the display label 5 is peeled off from the packaging film 4.

[0042] The printing substrate 54 may have a half-cut (not shown) positioned along one side of its circumference with a predetermined width. The half-cut penetrates the printing substrate 54. This half-cut may not cut the pseudo-adhesive layer 53 beneath the printing substrate 54, or may cut only a portion of it, but the depth should not completely cut the pseudo-adhesive layer 53. The printing substrate 54 has a first region (not shown) and a second region (not shown) separated from the first region by the half-cut. By providing a half-cut, it can be used as a starting point for peeling, making it easy to remove the printing substrate 54.

[0043] (Snack section) As shown in Figure 4, the display label 5 has a tab 56 at its peripheral edge (for example, one corner). The tab 56 is a non-adhesive area, which is an area where the packaging film and the pressure-sensitive adhesive layer 51 are not adhered. The tab 56 can be formed, for example, by covering or applying a non-adhesive material to the pressure-sensitive adhesive layer 51. The non-adhesive area can be created, for example, after the display label 5 has been formed. Alternatively, the tab 56 may be formed in advance by applying a non-adhesive material to the edge of one side of the pressure-sensitive adhesive layer 51. The non-adhesive material used in the non-adhesive area is not particularly limited, but examples include non-adhesive resin materials (printing ink, varnish, kill film, polyolefin film, polyester film, etc.). The tab 56 functions as a handle, peeling point, etc. when peeling off the printing substrate 54, and can be used as a starting point for peeling.

[0044] The display label 5 has a half-cut (not shown) at the boundary between the non-adhesive area formed on the handle portion 56 and the adhesive area that adheres to the pressure-sensitive adhesive layer 51. The half-cut penetrates the pressure-sensitive adhesive layer 51, the intermediate substrate 52, and the pseudo-adhesive layer 53 from the pressure-sensitive adhesive layer 51 side. This half-cut may not cut the printing substrate 54 or may cut only a portion of it, but the depth should not cut the printing substrate 54 completely. By providing a half-cut, it can be used as a starting point for peeling, making it easy to remove the printing substrate 54.

[0045] (Manufacturing method) The display label 5 can be manufactured by known methods. For example, it can be manufactured by a manufacturing method that includes the steps of obtaining a laminate by pseudo-adhering a pseudo-adhesive layer 53 to a printing substrate 54, and laminating an intermediate substrate 52 and a pressure-sensitive adhesive layer 51 onto the pseudo-adhesive layer 53 of the laminate.

[0046] As a method for obtaining the laminate, for example, a process of melt-extruding the material of the pseudo-adhesive layer 53 onto the printing substrate 54 using a T-die or the like can be employed. After the melt-extrusion process, a cooling process using a cooling roll or air cooling may be performed as needed.

[0047] As a method for laminating the intermediate substrate 52 and the pressure-sensitive adhesive layer 51 onto the pseudo-adhesive layer 53, for example, the intermediate substrate 52 and the pressure-sensitive adhesive layer 51 can be formed by applying the material of the intermediate substrate 52 to the surface of the pseudo-adhesive layer 53 of the laminate, and then applying the material of the pressure-sensitive adhesive layer 51 to the surface of the intermediate substrate 52. Examples of application methods include the roll coating method, spray coating method, bar coating method, knife coating method, roll-knife coating method, blade coating method, die coating method, gravure coating method, etc.

[0048] <Packaging methods for packaged products> In this embodiment, the packaged product 1 is packaged as follows. First, the group of articles 3 is placed on the pallet 2. For example, articles contained in boxes are stacked as shown in Figure 1 to form the group of articles 3.

[0049] Next, the packaging film 4 is wrapped around the outer surface of the article group 3. Because the packaging film 4 is elastic, it can be wrapped around the outer surface of the article group 3 while applying pressure to conform to its shape. In this way, the article group 3 is fixed in place by being covered with the packaging film 4.

[0050] Finally, a label 5 is affixed to the side or top surface of the packaging film 4 covering the group of items 3. This completes the packaging of the packaged product 1.

[0051] <How to recycle packaging film> Next, we will explain how to recycle the packaging film 4 of packaging product 1.

[0052] First, as shown in Figure 1, the tab 56 of the display label 5 is grasped and peeled off the packaging film 4 of the packaged product 1. At this time, the interface between the printing substrate 54 and the pseudo-adhesive layer 53 of the display label 5 is peeled off, causing the printing substrate 54 to be peeled off from the packaging film 4.

[0053] Next, the packaging film 4 from which the printing substrate 54 has been peeled off is removed from the group of articles 3. Since only recyclable material remains on the packaging film 4, it can be sent directly to the recycling process. Next, the packaging film 4 removed from the group of articles 3 is temporarily stored in a storage container (not shown). This allows a certain amount of packaging film 4 to be sent to the recycling process in one go.

[0054] To prevent foreign matter contamination due to forgetting to remove the printing substrate 54, a process may be performed to remove foreign matter (printing substrate 54) using a metal detector or magnetic detector before or after temporarily storing the packaging film 4 in the storage container.

[0055] In the packaging product 1 of the above embodiment, the packaging product 1 comprises a pallet 2, a group of articles 3 placed on the pallet 2, a packaging film 4, and a display label 5. The packaging film 4 is made of a stretchable, recyclable film, and the display label 5 is formed by laminating a pressure-sensitive adhesive layer 51, an intermediate substrate 52, a pseudo-adhesive layer 53, and a printing substrate 54 in that order from the side attached to the packaging film 4. Furthermore, the intermediate substrate 52, the pressure-sensitive adhesive layer 51, and the pseudo-adhesive layer 53 are made of materials that can be recycled simultaneously with the packaging film 4. Therefore, even if the packaging film 4 is sent directly to the recycling process after peeling, a sorting process is not required in the recycling process, and there is no risk of quality degradation due to the inclusion of the printed layer. Consequently, recycling becomes easier, the productivity of recycling can be improved, and the burden on the environment is reduced.

[0056] Furthermore, in the packaging product of the present invention, the printing substrate 54 has a separation indicator 55 that shows that the packaging film 4 and the printing substrate 54 can be separated for disposal. Therefore, workers can perform the separation work without confusion, thereby further improving the productivity of recycling.

[0057] Furthermore, in the packaging product of the present invention, the display label 5 has a tab 56 at its peripheral edge. By pinching this tab 56, the printing substrate 54 of the display label 5 can be peeled off from the pseudo-adhesive layer 53. Therefore, the printing substrate 54 of the display label 5 can be easily peeled off from the packaging film 4, and recycling can be performed even more efficiently.

[0058] In the packaging product of the present invention, a packaging film 4 is wrapped around the outer surface of a group of articles 3 placed on a bullet 2 to cover the group of articles 3. After covering the group of articles 3, a display label 5 is attached to the packaging film 4 to complete the packaging of the group of articles 3 and form a packaging product 1. The packaging product 1 is transported by a forklift or the like, and after transport, the printing substrate 54 of the display label 5 is peeled off the packaging film 4. Then the packaging film 4 is removed from the group of articles 3. Thus, the packaging film 4 from which the printing substrate 54 has been removed is sent to the recycling process. Therefore, recycling can be performed without requiring an additional sorting process, improving the productivity of recycling and improving the quality of recycled products.

[0059] In the above procedure, the printing substrate 54 of the label 5 is peeled off the packaging film 4 before the packaging film 4 is removed from the group of items 3. However, this process does not necessarily have to be performed in this order. Conversely, the packaging film 4 may be removed from the group of items 3 first, and then the printing substrate 54 of the label 5 may be peeled off the packaging film 4.

[0060] Although the present invention has been described above based on the above embodiments, the present invention is not limited to the contents of the above embodiments, and can naturally be modified as appropriate without departing from the present invention. In other words, all other embodiments, examples, and operational techniques made by those skilled in the art based on these embodiments are of course included in the scope of the present invention. [Explanation of symbols]

[0061] 1 packaged product 1 2 pallets 3 Group of goods 4. Packaging film 5. Display Labels 6. Release paper 51 Pressure-sensitive adhesive layer 52 Intermediate materials 53 Pseudo-adhesive layer 54 Printing base material 55 Separate display 56 Knob

Claims

1. A packaging product comprising a pallet, a group of articles placed on the pallet, packaging film, and a label, The packaging film is made of a recyclable film that is stretchable, and covers the group of articles along the outer surface of the group of articles. The label is affixed to a part of the side or top surface of the group of articles covered with the packaging film, and is formed by laminating a pressure-sensitive adhesive layer, an intermediate substrate, a pseudo-adhesive layer, and a printing substrate in this order from the side affixed to the packaging film. A packaging product characterized in that the intermediate substrate, the pressure-sensitive adhesive layer, and the pseudo-adhesive layer are formed from materials that can be recycled simultaneously with the packaging film.

2. The packaging product according to claim 1, characterized in that the printing substrate has a sorting label indicating that the packaging film and the printing substrate can be disposed of separately.

3. The printing substrate is provided with a half-cut that is arranged along one side of the printing substrate from the peripheral edge with a predetermined width, The packaging product according to claim 1 or 2, characterized in that the half-cut penetrates the printing substrate.

4. The aforementioned display label has a tab at its peripheral edge, The packaging product according to claim 1 or 2, characterized in that the gripping portion is used to peel the printing substrate of the display label from the packaging film by gripping the gripping portion and peeling the printing substrate of the display label from the pseudo-adhesive layer.

5. The aforementioned knob portion forms a non-adhesive region where the packaging film and the pressure-sensitive adhesive layer are not adhered. The display label has a half-cut at the boundary between the non-adhesive area of ​​the knob and the adhesive area that adheres to the pressure-sensitive adhesive layer. The packaging product according to claim 4, characterized in that the half-cut penetrates the pressure-sensitive adhesive layer, the intermediate substrate, and the pseudo-adhesive layer, but does not cut the printing substrate.

6. A method for recycling the packaging film of the packaging product described in claim 1 or 2, The process involves peeling the printing substrate of the display label from the packaging film, A recycling method characterized by removing the packaging film from the group of articles.

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