Packaging materials

Abstract

The present invention provides a packaging material with a simple structure that offers easy opening along the intended opening line. [Solution] The packaging material comprises a first sheet, a second sheet joined to the first sheet, and a laminated portion 10 in which the first sheet and the second sheet are stacked. The laminated portion 10 has a joint portion 15 that removably joins the first sheet 1 and the second sheet 2. At least one side edge 10a of the laminated portion 10 is not joined to the first sheet 1 or the second sheet 2 positioned on the inside, and the joint portion 15 is peeled off to open the package.

Description

Technical Field

[0001] The present disclosure relates to a packaging material having easy-opening properties.

Background Art

[0002] Packaging materials that can be opened by hand without using tools such as scissors or cutters are required to have packaging properties for protecting the contents and easy-opening properties. Packaging materials having easy-opening properties have been developed (see Patent Document 1). For example, a notch (such as a cut portion or a notch) is provided at the end of a bag to specify the opening start position, and a perforation is provided to guide a tear cut and an opening line. Further, a stretched film having a cutting direction is laminated to improve linear cutting properties.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, such a packaging material having a notch or the like provided at the end of a bag has a problem that it is difficult to cut in the middle of the opening line and requires a considerable force for opening. Further, there are also problems such as insufficient opening, inability to cut along an intended opening line such as a straight line, difficulty in taking out the contents, and further spillage and scattering of the contents, and it has not been possible to achieve the required easy-opening properties. In addition, complicated, special structures, materials, and manufacturing lead to increased costs, and there is room for improvement in all of them.

[0005] One object of the present disclosure is to provide a packaging material having a simple structure and capable of being easily opened along a predetermined opening line.

Means for Solving the Problems

[0006] A packaging material according to one aspect of the present disclosure comprises a first sheet, a second sheet bonded to the first sheet, and a laminated portion formed by the lamination of the first sheet and the second sheet, wherein the laminated portion has a joint that removably bonds the first sheet and the second sheet, and at least one side edge of the laminated portion is not bonded to the first sheet or the second sheet positioned on the inside, and the packaging can be opened by peeling off the joint. [Effects of the Invention]

[0007] The above packaging materials have a simple structure and are characterized by their ability to be easily opened along a designated opening line. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic plan view (front view) of a packaging material (bag) according to one embodiment of the present disclosure. [Figure 2] Figure 1 is a schematic perspective view of the packaging material. [Figure 3] Figure 1 is a schematic cross-sectional view of the packaging material. [Figure 4] Figure 2 is a schematic perspective view showing the packaging material in a sealed state. [Figure 5] Figure 4 is a schematic perspective view showing the packaging material with the joints removed. [Figure 6] Figure 5 is a schematic perspective view showing the opening of the packaging material in an enlarged state. [Figure 7] Figure 4 is a schematic cross-sectional view of the packaging material. [Figure 8] This is a schematic cross-sectional view showing another embodiment. [Figure 9] This is a schematic plan view showing another embodiment. [Figure 10] This is a schematic plan view showing another embodiment. [Figure 11] This is a schematic plan view showing another embodiment. [Figure 12] This is a schematic plan view showing another embodiment. [Figure 13] This is a schematic perspective view of a packaging material (covering) according to another embodiment of the present disclosure. [Figure 14]Figure 13 is a schematic exploded perspective view of the packaging material. [Figure 15] Figure 13 is a schematic cross-sectional view of the packaging material. [Modes for carrying out the invention]

[0009] The present disclosure will be described in detail below with reference to the drawings. In the following description, terms indicating specific directions or positions (e.g., "up," "down," and other terms including these) will be used as needed. The use of these terms is for the purpose of facilitating the understanding of the invention with reference to the drawings, and the meaning of these terms does not limit the technical scope of the present invention. Also, parts with the same reference numerals appearing in multiple drawings indicate the same or equivalent parts or components. Furthermore, the embodiments described below illustrate specific examples of the technical concept of the present invention and do not limit the present invention to the following. Also, the dimensions, materials, shapes, relative arrangements, etc. of the components described below are intended to be illustrative, and not to limit the scope of the present invention unless otherwise specified. In addition, the content described in one embodiment or example is applicable to other embodiments and examples. Furthermore, the size and positional relationships of the members shown in the drawings may be exaggerated for clarity of explanation. Schematic cross-sectional views, etc., are exaggerated for ease of understanding and clarity of explanation; for example, the thickness, spacing, gaps, joints, and adhesive parts of the first and second sheets are not accurate, and the schematic joints and adhesive parts are shown as thick rectangles. Note that "inside" refers to the side closest to the stacked storage compartment (internal gap), while "outside" refers to the area outside the inside, the opposite side from the inside.

[0010] This disclosure may be identified by the following configurations and features: The packaging material according to an embodiment of the present disclosure includes a first sheet, a second sheet joined to the first sheet, and a laminated portion where the first sheet and the second sheet are laminated. The laminated portion has a joining portion that releasably joins the first sheet and the second sheet, and at least one side edge portion of the laminated portion is non - joined to the first sheet or the second sheet disposed inside, and can be opened by peeling the joining portion.

[0011] The above configuration has the features of a simple structure and can be easily opened with a predetermined opening line. This is because it includes a laminated portion where the first sheet and the second sheet are laminated, the laminated portion has a joining portion that releasably joins the first sheet and the second sheet, and can be opened by peeling the joining portion. At least at one side edge portion of the laminated portion, the inner sheet (the first sheet or the second sheet) and the outer sheet (the second sheet or the first sheet) are non - joined. By using this non - joined portion (non - joining portion), force can be easily and efficiently applied in the direction of peeling and breaking the joined first sheet and second sheet, and it has the feature that it can be easily opened with fingers without using tools. The above configuration has the feature that it can be opened along the joining portion by peeling, separating, and breaking the first sheet and the second sheet joined at the joining portion without partially cutting or cutting the sheet, and can achieve stable easy - opening performance with a predetermined opening line. The above configuration has the feature that the opening line can be easily determined by the arrangement and shape of the joining portion, and the joining strength and the ease of peeling can be easily set and adjusted by the length, width, and joining method of the joining portion.

[0012] The above configuration has the advantage of achieving both easy opening and secure packaging. Normally, easy opening and secure packaging are contradictory and it is not easy to achieve both. On the one hand, easy opening requires lowering the joint strength to make it easy to peel and cut, while on the other hand, to ensure secure packaging and prevent unintentional peeling or opening, a certain level of sufficient joint strength is required, making it difficult to peel or cut. With the above configuration, on the one hand, by hooking a fingertip onto one side edge of the unjointed laminated section and pulling, the joint can be peeled off, and stable easy opening along the opening line of the joint can be achieved. On the other hand, a joint is provided in the laminated section, and the unjointed portion (unjointed section) is located along the joint, making it difficult for the first and second sheets to bend. Furthermore, the first and second sheets are closely and tightly laminated in the laminated section, preventing the outer sheet from peeling up, making it difficult for force to be applied in the peeling direction, protecting and reinforcing the joint, preventing the first and second sheets from unintentionally separating, thus ensuring secure packaging of the contents and achieving closure and protection of the contents (reliable packaging). In addition, the above configuration has the advantage of easily setting and adjusting the width, shape, area, arrangement, joining method, and joining strength of the joint and laminated sections depending on the packaging material, sheet, etc. The above configuration also has the advantage of being simple in structure, requiring no special manufacturing processes or materials, being easy to manufacture, and enabling inexpensive mass production, thus reducing costs. Because the above configuration does not involve partially cutting the first or second sheet, the materials of the first and / or second sheet are not limited to those that can be cut, and can be used regardless of whether they are tear-resistant or not, and inexpensive sheets and films can also be used. There is also no problem of whiskers appearing at the cut edges. Furthermore, because the above configuration can be opened without any parts separating from the packaging material such as opening tape (cut tape, tear tape) or thread, it has the advantage of being easy to dispose of.

[0013] In addition to the above aspects, the packaging material according to another embodiment of the present disclosure is such that the joint portion of the laminated portion can linearly join the first sheet and the second sheet. The above configuration has the features of a simple structure and can be easily opened along a predetermined opening line. The above configuration has the feature of being able to achieve both easy opening and packaging reliability. By having a joint portion where the laminated portion is joined linearly such as a straight line or a curve, the first sheet and the second sheet can be joined linearly and continuously, improving the sealing property, the reliability of joining, the packaging of the contents, and the protective property (packaging reliability), and preventing foreign matter from being mixed in. Also, the linear joint portion is easy to open along a predetermined opening line. By hooking a fingertip on one side edge portion (non-joint portion) of the non-joined laminated portion and applying a force in the direction of peeling off the outer sheet by pulling, it is easy to peel off, and thus easy opening can be realized. The joint portion can join the first sheet and the second sheet linearly as a whole, or can be joined linearly partially.

[0014] In addition to the above aspects, the packaging material according to another embodiment of the present disclosure is such that the joint portion of the laminated portion can laminate the first sheet and the second sheet in a planar manner. The above configuration has the feature of easy opening with a simple structure and can be easily opened along a predetermined opening line. This is because the joint portion can be joined easily and stably, and by applying a force in the direction of peeling off the outer sheet using one side edge portion (non-joint portion) of the non-joined laminated portion, it is easy to peel off. The above configuration can laminate the first sheet and the second sheet laminated in a planar manner in a close and adhering state, prevent and suppress bending and curving of the laminated portion, prevent the outer sheet from turning up, make it difficult for a force to be applied in an unintentionally efficiently peelable direction, protect and reinforce the laminated portion and the joint portion, and has the feature of being able to achieve both packaging reliability and easy opening.

[0015] In addition to the above embodiments, packaging materials according to other embodiments of the present disclosure may have a joint portion comprising a first joint portion extending in a first direction and second joint portions extending in a direction different from that of the first joint portion at both ends of the first joint portion. The above configuration has the advantage of a simple structure and can be easily opened along a predetermined opening line. By having the second joint portions extend in a direction different from that of the first joint portion and provided at both ends (both sides) of the first joint portion, when force is applied in the direction of peeling off the outer sheet using one side edge (non-joint portion) of the non-jointed laminated portion, the second joint portion suppresses the spreading of the non-joint portion, making it difficult for the non-joint portion of the laminated portion to spread beyond a certain range, creating a grip for the fingertips, allowing force to be efficiently applied in the direction of peeling off the outer sheet that is separating the joint portion, enabling efficient opening with less force, and significantly improving ease of opening. Furthermore, the above configuration has the advantage that the second joints, provided at both ends (both sides) of the first joint and extending in a different direction from the first joint, can efficiently protect and reinforce the laminated portion (joint), thereby achieving both security and ease of opening of the packaging. The above configuration has the advantage that the shape, length, width, orientation, arrangement, and combination of the first joint and the second joint can be determined to contribute to the security and ease of opening of the packaging. The second joint can be connected to the first joint by intersecting it, and has the advantage of achieving both security and ease of opening of the packaging. The first direction is the direction in which the first joint extends, and in Figure 1, it is the X-axis direction. If the first joint has multiple directions of extension, one of these directions will be the first direction, and the joint can have a second joint that extends in a direction different from the extension direction of any of the first joints.

[0016] In addition to the above embodiments, packaging materials according to other embodiments of this disclosure have a second joint that can join the first sheet and the second sheet at the periphery. The above configuration has the advantage of a simple structure and can be easily opened at a predetermined opening line. The above configuration has the advantage of ensuring the length of the first joint extending in the first direction, efficiently preventing the outer sheet from curling up, protecting and reinforcing the laminated portion and joint, and achieving both packaging reliability and easy opening. The above configuration has the advantage of being easy to manufacture and cost-effective.

[0017] In addition to the above embodiments, packaging materials according to other embodiments of this disclosure can have a joint width (s1) of the first joint wider than the joint width (s2) of the second joint. The above configuration has the advantage of a simple structure and can be easily opened at a predetermined opening line. Furthermore, the above configuration has the advantage of achieving both packaging reliability and ease of opening. For example, the first joint can be heat-sealed and the second joint can be heat-sealed. The relatively narrow second joint can have a joint width (s2) that allows for a fingertip to grip, thus minimizing the impediment to ease of opening, and can also protect and reinforce the laminated portion and the joint. Furthermore, by providing the second joint with a relatively narrow joint width (s2), the first joint can be extended in the first direction to a narrow width within the peelable range, thereby possessing conflicting joint strength and ease of peeling, and the above configuration can achieve packaging reliability and ease of opening.

[0018] In addition to the above embodiments, packaging materials according to other embodiments of this disclosure may have a joint positioned in the center of the width direction (w) of the laminated portion. The above configuration has the advantage of a simple structure and can be easily opened at a predetermined opening line. Furthermore, the above configuration has the advantage of achieving both packaging reliability and ease of opening. In the above configuration, by positioning the joint in the center of the width direction (w) of the laminated portion, there are two or more laminated portions on both sides of the joint, and the laminated portions on both sides of the joint are in close contact with the first sheet and the second sheet, and the first sheet and the second sheet laminated on both sides of the joint stretch in opposite directions, acting as auxiliary material, and preventing the laminated portion (outer sheet) from unintentionally peeling up and the joint from peeling off, and making it difficult for force to be applied in a direction that can be efficiently peeled off unintentionally, thereby protecting and reinforcing the laminated portion and the joint, improving packaging reliability, and also reducing the bonding strength of the joint, thereby improving ease of opening. Note that the central part in the width (w) direction of the laminated section refers to the portion excluding the side edges on both sides, which are the ends of the laminated section in the width (w) direction.

[0019] In addition to the above embodiments, packaging materials according to other embodiments of this disclosure may have non-joint portions at both side edges of the laminated portion where the first sheet and the second sheet are not joined. The above configuration has the advantage of a simple structure and can be easily opened at a predetermined opening line. The non-joint portions at both side edges of the laminated portion where the first sheet and the second sheet are not joined, are such that the end of the first sheet is not joined to the second sheet, and the end of the second sheet is not joined to the first sheet. In this configuration, the non-joint portions at both side edges of the laminated portion do not hinder the peelability of the first joint, and easy opening at a predetermined opening line can be achieved. Furthermore, the above configuration has the advantage that the non-joint portions act as reinforcing materials that protect and reinforce the laminated portion and the joint, preventing bending of the laminated portion, preventing the outer sheet from peeling up, preventing unintentional opening, and improving the reliability of the packaging.

[0020] In addition to the above embodiments, packaging materials according to other embodiments of this disclosure have a joint that allows the first sheet and the second sheet to be joined by heat sealing. The above configuration has the advantage of a simple structure and can be easily opened at a predetermined opening line. Furthermore, the above configuration has the advantage of achieving both packaging reliability and easy opening. The joint that is joined by heat sealing can be easily welded by overlapping the first sheet and the second sheet, and the shape, width, length and arrangement of the joint can be easily determined. For example, the first joint can be a heat seal with a joining width (s1), and the second joint can be a cut seal. Furthermore, the reliability of the packaging can be easily improved by using a linear joint, and peel strength within a certain range can be stably achieved, thus achieving easy opening. Furthermore, the above configuration has the advantage of being able to manufacture packaging materials at low cost by laminating, sealing, and cutting the first sheet and the second sheet. (Embodiment 1)

[0021] Figures 1 to 3 illustrate packaging material 100 formed in a bag 100A according to Embodiment 1. The packaging material 100 is a packaging material, packaging sheet, or film for packaging contents, and can be formed into a bag 100A by joining a plurality of sheets, including a first sheet 1 and a second sheet 2, or the first sheet 1 and / or the second sheet 2 can be formed into a bag 100A. The packaging material 100 of the bag 100A illustrated in Figures 1 and 2 is a bag with a tab, and has a first sheet 1 in the shape of a bag, and a second sheet 2 having a tab (lid) that can close the bag shape, and the second sheet 2 is stacked on top of the first sheet 1, joined and connected. For example, the bag 100A can be formed by forming the first sheet 1 into a cylindrical tube shape, heat sealing, cutting, or cutting it to a predetermined length, and joining the second sheet 2. This bag 100A has the advantages of being easy to manufacture, enabling high-speed and high-volume production, and being able to be manufactured at low cost.

[0022] The packaging material 100 is formed into a predetermined shape, such as a bag 100A, by joining a first sheet 1 and a second sheet 2. In Figure 1, the bag 100A is rectangular in plan view, the width of the first sheet 1 is the width of the bag 100A, and the height of the first sheet 1 and the second sheet 2 connected thereto is the height of the bag 100A. In Figures 2 and 3, the bag 100A (first sheet 1) has a front surface 100A1 and a back surface 100A2, which are joined at the peripheral edge 1b, and has an opening 6 at the peripheral edge 1b where the front surface 100A1 and the back surface 100A2 are partially unjoined, and a storage section 5 for storing contents inside. The bag 100A in Figures 1 to 3 is formed from a first sheet 1 into a bag shape, with the front surface 100A1 and back surface 100A2 joined on three sides (both sides except the top in the figure) and the bottom, while the top is not joined and has an open end (opening 6). The second sheet 2 has a laminated portion 10 and a tab (lid portion), and the laminated portion 10 of the second sheet 2 is joined and connected to the outside of the first sheet 1 via a joint portion 15. The packaging material 100 of the bag 100A in Figure 3 has an opening 6 into which contents can be stored inside the bag 100A and a closing portion 7 that closes the opening 6, and the closing portion 7 has an adhesive portion 4 that is bonded and joined to close the bag 100A after contents have been stored inside the bag 100A. The second sheet 2 in Figure 3 has an adhesive portion 4, and after the contents are placed inside the bag 100A, the adhesive portion 4 is bonded, fused, or joined to close the bag 100A. The adhesive portion 4 can be, for example, adhesive tape, double-sided tape, adhesive glue, or adhesive, and can be bonded in a predetermined position to close the opening 6. The adhesive portion 4 can be covered with an easily removable anti-adhesion tape or otherwise not exposed to prevent the adhesive portion 4 from bonding in an unclosed state. The closing portion 7 can also be closed with a fastener such as those used in bread packaging. Alternatively, the bag may be sealed or joined after the contents are placed inside.

[0023] This disclosure does not specify the shape, size, thickness, material, position, size, or closing method of the opening 6 of the first sheet 1 and the second sheet 2. The packaging material 100 illustrated in Figures 1 to 3 forms a bag body 100A by making the first sheet 1, which is in the shape of a bag, relatively large, and the second sheet 2, which is the tab and laminated portion 10, is relatively small. However, for example, the first sheet 1 and the second sheet 2 can be the same size and shape, or the second sheet 2 can be larger than the first sheet 1.

[0024] The first sheet 1 and the second sheet 2 can be, for example, thermoplastic plastic films or plastic sheets. The first sheet 1 and the second sheet 2 can be laminated in single or multiple layers. Different materials, various properties, and high-performance films and sheets can be laminated, such as base films, barrier films, and sealant films. Heat-sealing plastic films (sealant films), such as LDPE (low-density polyethylene), can be laminated to improve heat sealability and utilize properties such as moisture resistance, cold resistance, and transparency. Films and sheets can be, for example, synthetic resins including heat-sealable polyethylene, polypropylene, polyamide, and ABS, as well as aluminum (metal), vapor deposition, and paper. The first sheet 1 and / or the second sheet 2 can be transparent, translucent, or opaque films and sheets. Transparent films and sheets allow for easy viewing of the contents even when unopened. (Laminated section 10)

[0025] The laminated section 10 is formed by laminating the first sheet 1 and the second sheet 2. The laminated section 10 is the portion where the outer sheet is laminated on top of (outside of) the inner sheet. The area and shape of the laminated section 10 are determined by the lamination range of the first sheet 1 and the second sheet 2. The laminated section 10 is provided near one end 1a, 2a, peripheral edges 1b, 2b of each of the first sheet 1 and the second sheet 2. By providing the laminated section 10 in the packaging material 100, the first sheet 1 and the second sheet 2 can be easily joined within the width (w) range of the laminated section 10, and bending and curvature at the joint 15 where the first sheet 1 and the second sheet 2 are joined can be prevented or suppressed. Furthermore, it prevents the first sheet 1 and the second sheet 2 from unintentionally peeling off or opening, ensuring secure joining and packaging (packaging reliability) of the first sheet 1 and the second sheet 2, while also enabling easy opening. The laminated section 10 is arranged with either the first sheet 1 or the second sheet 2 on the inside and the other on the outside. In the laminated section 10 of Figures 1 and 3, the inner sheet is the first sheet 1 and the outer sheet is the second sheet 2, with the second sheet 2 partially overlapping and laminated on the outside of the first sheet 1. The second sheet 2 has a laminated section 10 that is laminated on the outside of the first sheet 1. The packaging material 100 of Figures 1 to 3 comprises a first sheet 1 and a second sheet 2 joined to the first sheet 1, and has a laminated section 10 where the second sheet 2 is laminated on the outside of the first sheet 1. Note that the first sheet 1 can also be the outer sheet and the second sheet 2 can be the inner sheet.

[0026] The laminated section 10 illustrated in Figure 1 is rectangular and has a pair of side edges 10a and 10b and a pair of ends 10c and 10d. The laminated section 10 in Figure 1 has a width (w) in the short direction and a length (l) in the long direction. The width (w) is the distance between the pair of side edges 10a and 10b, and the length (l) is the distance between the pair of ends 10c and 10d. The direction of the length (l) of the laminated section 10 in Figure 1 is substantially the same as the first direction in which the joint 15 (first joint 15A) extends. The width (w) of the laminated section 10 is determined by the distance between the end 1a of the first sheet 1 and the end 2a of the second sheet 2, and indicates the degree of overlap between the first sheet 1 and the second sheet 2. The laminated section 10 in Figure 1 is a long, narrow rectangle with a width (w) shorter than its length (l), extending in a first direction (X-axis direction). The side edges 10a and 10b on both sides extend parallel to each other in the first direction, and the ends 10c and 10d connect the ends of the side edges 10a and 10b. The long, narrow shape of the laminated section 10 reduces the area where the first sheet 1 and the second sheet 2 are laminated, thereby reducing material costs. At the same time, the length (l in the figure) of the non-jointed portion 13 (hooking portion 14, gripping portion) of the side edge 10a can be increased, making it easier to insert fingers, hook, pull, pinch, and grip, thus enabling easy opening. Furthermore, it effectively prevents the joint portion 15 from unintentionally peeling off, improving the reliability of the packaging. By providing the laminated section 10 near the opening 6, the respective ends 1a and 2a of the first sheet 1 and the second sheet 2 can be utilized, simplifying the structure, allowing the laminated section 10 to have an elongated shape, reducing material costs, and enabling easy removal of contents after peeling off the joint 15 adjacent to the opening 6. The length (l) of the laminated section 10 in Figure 1 is less than or equal to the width of the first sheet 1. The width (w) and length (l) of the laminated section 10 are determined within an appropriate range depending on the material, size, and shape of the sheets, the size and placement of the opening 6, the width and length of the joint 15, the joining method, and the degree of ease of opening. The width (w) of the laminated section 10 can be made wider to increase the laminated area, and narrower to decrease the laminated area. The length (l) of the laminated section 10 can be made longer to easily remove the contents. The laminated section 10 can also be made into a shape other than a rectangle.

[0027] The laminated portion 10 in Figures 1 to 3 consists of a first sheet 1 and a second sheet 2 laminated in a planar manner. This configuration allows for easy joining of the first sheet 1 and the second sheet 2, prevents and suppresses bending and curvature at the joint 15, and ensures reliable joining of the first sheet 1 and the second sheet 2, as well as easy opening. Furthermore, the gap between the first sheet 1 and the unjoined end 2a of the second sheet 2, which are one side edge 10a and 10b of the laminated portion 10, can be minimized, allowing for close and tight lamination. This reinforces the sheet being packaged, improves packaging and protection, and prevents the outer second sheet 2 from unintentionally peeling up. The joint 15 has relatively high tensile strength against tension in the planar direction in which the first sheet 1 and the second sheet 2 are laminated, especially in the X-axis direction. Therefore, by laminating the first sheet 1 and the second sheet 2 in a planar manner, non-opening properties can be achieved. Furthermore, since the joint portion 15 has relatively low tensile strength against tension in the Z-axis direction perpendicular to the plane on which the first sheet 1 and the second sheet 2 are stacked, it can be easily opened by hooking it onto the non-joint portion 13 and pulling.

[0028] The laminated section 10 can be divided into multiple laminated sections 10 at the joint section 15. In Figure 1, the laminated section 10 is divided into a first laminated section 11 and a second laminated section 12, which are located on the upper and lower sides of the first joint section 15A, by providing the first joint section 15A in the center of the width (w) direction of the laminated section 10. The first laminated section 11 has a first sheet 1 and a second sheet 2 laminated between the first joint section 15A and one side edge 10a of the laminated section 10, and the second laminated section 12 has a first sheet 1 and a second sheet 2 laminated between the first joint section 15A and the other side edge 10b of the laminated section 10. The width (w10) of the first laminated section 11 is such that a fingertip, fingertip, or nail can be hooked, inserted, and made contact, making it easier to hook the side edge 10a of the non-jointed section 13, increasing the grip, providing a trigger for the joint section 15 to peel off, and improving ease of opening. Furthermore, the width (w10) of the first laminated portion 11 can be made wide enough to be pinched, grasped, and pulled with fingers, thereby further improving ease of opening. The starting position for peeling of the joint portion 15 can be determined by hooking, inserting, and pulling a finger into the non-joint portion 13. In Figure 1, the first laminated portion 11 has side edges 10a and 10b that are generally straight, but they can be generally curved (Figures 9 and 10), or partially straight and curved, and a combination of straight and curved can be used. Furthermore, one side edge 10a can be provided with a notch or notch line, and a recessed portion or protruding portion can be provided that is recessed from a line parallel to the joint portion 15 (first joint portion 15A), the other side edge 10b, or the line connecting the tips of both ends 10c and 10d, thereby improving ease of opening and the reliability of the packaging. The shape and width (w10) of the first laminated section 11 can be the same as (Figure 1) or different from (Figures 9 and 10) the second laminated section 12.

[0029] As shown in Figure 3, the end 2a of the second sheet 2 of the outer sheet is positioned on the outside of the outer surface of the first sheet 1 (left surface 100A1 in Figure 3) of the inner sheet. The end 1a of the first sheet 1 is positioned on the inside of the inner surface of the second sheet 2. The first laminated section 11 and the second laminated section 12, positioned on both sides of the joint 15, prevent and suppress bending and curvature at the joint 15, ensuring a secure bond between the first sheet 1 and the second sheet 2, and enabling easy opening. In the laminated section 10 of Figure 3, the second sheet 2 is laminated on top of (outside of) the first sheet 1, creating a step equal to the thickness of the second sheet 2 (laminated section 10). This makes it easy to hook a finger onto the end 2a of the second sheet 2 at the non-jointed section 13, and the two sheets with the same opening line are in close contact, eliminating static electricity problems such as difficulty in gripping and opening. The layered steps and the thin, flexible sheet-like first sheet 1 and second sheet 2 make it easy to insert a finger into the non-jointed portion 13 and hook it. (joint part 15)

[0030] The laminated section 10 in Figures 1 to 3 has a joint section 15 that joins the first sheet 1 and the second sheet 2, and a non-joint section 13 where the first sheet 1 and the second sheet 2 are not joined. One or more joint sections 15 can be provided and can be arranged to extend in one or more directions. The joint section 15 can join the first sheet 1 and the second sheet 2 linearly or non-linearly. Multiple rows of the linear or non-linear joint sections 15 can be arranged in parallel or non-parallel, and can also be arranged in a dashed or dotted line pattern. The joint sections 15 can be joined in a shape having the same or different joint widths (s). The packaging material 100 can be opened by peeling apart the first sheet 1 and the second sheet 2 joined at the joint section 15, and the contents can be removed from the peeled portion, the opening 6. Delamination includes, for example, boundary delamination where the first sheet 1 and the second sheet 2 peel off at the boundary (interface), interlayer delamination where the film peels off between layers of the multi-layered film, and condensation delamination where the film peels off due to condensation failure within the layers. The joint 15 (first joint 15A) in Figures 1 to 3 is a heat seal in which the first sheet 1 and the second sheet 2 are overlapped and welded together, but any other joining method that allows the first sheet 1 and the second sheet 2 to be joined in a peelable manner can be used, such as adhesive tape, double-sided tape, adhesive glue, or adhesive.

[0031] The laminated section 10 in Figures 1 to 3 has a joint section 15 that linearly joins the first sheet 1 and the second sheet 2, which are laminated in a planar manner. The linear joint section 15 can continuously join the first sheet 1 and the second sheet 2 without interruption, improving the reliability of the packaging. By providing the linear joint section 15 to extend in the longitudinal direction of the laminated section 10, the length of the joint section 15 (first joint section 15A) can be ensured. The joint section 15 in Figures 1 to 3 has a first joint section 15A that extends in a first direction and linearly joins the first sheet 1 and the second sheet 2, which are laminated in a planar manner, and the length of the first joint section 15A is the length (l) of the laminated section 10. The long, linear joint portion 15 (first joint portion 15A) allows for a wider opening area than the short joint portion 15, and the joint strength (difficulty of peeling) can be set by the length (l) and joint width (s), providing a wide adjustment range and achieving both stable and reliable easy opening and the certainty of packaging that will not be unintentionally opened (unopenable). For example, the joint portion 15 can be made easier to peel by making the joint width (s) narrower, and the joint strength can be ensured by making it longer. The first joint portion 15A, which extends in the first direction, has particularly high tensile resistance in the first direction (X-axis direction). Furthermore, in the laminated portion 10, the first sheet 1 and the second sheet 2 are laminated in close contact, preventing bending and folding, and the force that would pull the laminated portion 10 (second sheet 2) and the first sheet 1 in the X-axis, Y-axis, and Z-axis directions can be avoided or suppressed, thereby achieving packaging reliability. In particular, the laminated sections 10 (first laminated section 11, second laminated section 12) arranged parallel to both sides of the first joint section 15A can efficiently prevent bending, creasing, and unintentional opening, thereby improving the reliability of the packaging.

[0032] The laminated portion 10, which is laminated on the outside of the inner sheet, has non-joint portions 13 on one or both of its side edges 10a, 10b that are not joined to the inner sheet. In the non-joint portions 13, the first sheet 1 and the second sheet 2 are not joined. In the laminated portion 10 in Figures 1 to 3, the inner first sheet 1 and the outer second sheet 2 are not joined at both side edges 10a, 10b. As shown in Figures 3 and 4, by hooking a fingertip onto the side edge 10a, which is the non-joint portion 13, and inserting it, the laminated portion 10 can be spread outward, thereby applying force in a direction that separates, detaches, and peels the first sheet 1 and the second sheet 2, and the packaging material 100 can be opened from the part where the first sheet 1 and the second sheet 2 have peeled and separated. The configuration in which the side edge 10a of the laminated portion 10 is a non-jointed portion 13 makes it easy to hook onto the fingertip, nail, or fingertip, making it easy to grasp and open.

[0033] The joint portion 15 in Figures 1 and 2 has a first joint portion 15A extending in a first direction (the X-axis direction in the figure) and a second joint portion 15B extending in a direction different from the first direction (the Y-axis direction in the figure). This configuration can achieve both easy opening and secure packaging. This configuration makes it easier to separate the first sheet 1 and the second sheet 2 by narrowing the joining width (s1) of the first joint portion 15A and reducing the joining area of ​​the joint portion 15, while ensuring the length (l) of the first joint portion 15A in the elongated laminated portion 10 in the first direction, thereby improving the security of the packaging. The presence of the second joint portion 15B suppresses the spreading of the non-joint portion 13 when opening it by inserting a finger into the side edge portion 10a of the non-joint portion 13, making it difficult for the side edge portion 10a of the non-joint portion 13 to spread beyond a certain range, creating a grip for the fingertip, allowing force to be efficiently applied in the direction of peeling off the joint portion 15 (Z-axis direction), and significantly improving ease of opening. The side edge portion 10a of the non-joint portion 13 can be pinched, grasped, or held with the fingertip as a gripping piece, or it can be hooked without grasping or holding, allowing for easy peeling and opening with little force. The first joint portion 15A achieves ease of opening and packaging security with its joint width (s1) and length (l in Figure 1), and the addition of the second joint portion 15B further efficiently improves ease of opening and packaging security. The first joint 15A and the second joint 15B can achieve the required ease of opening and packaging security through various combinations of their respective lengths, widths, numbers, and arrangements. The length (l) of the first joint 15A is longer than that of the second joint 15B, and the length (l) of the first joint 15A can be, for example, 2 to 50 times that of the second joint 15B, and preferably 4 to 30 times.

[0034] The second joint portion 15B in Figures 1 and 2 is provided at the ends 10c and 10d of the laminated portion 10 and is connected to both ends of the first joint portion 15A. This configuration ensures the length (l) of the first joint portion 15A extending in the first direction and improves ease of opening. This is because the second joint portion 15B, which is connected to both ends of the first joint portion 15A and extends in a direction different from the first direction (Y-axis direction), can create a grip for the fingertip, making it easier to hook the fingertip into the non-joint portion 13 and insert it. The flexibility and adaptability of the thin first sheet 1 and second sheet 2 make it easy to hook and insert fingertips at the non-jointed portion 13 near the center of the central part, and it becomes possible to hook fingertips more strongly as you approach the edges of the central part (ends 10c, 10d). Furthermore, it has the advantage of efficiently improving ease of opening without widening the width (w) of the laminated portion 10 (first laminated portion 11). The second joint portion 15B in Figures 1 and 2 is connected to the first joint portion 15A in a perpendicular position. The second joint portion 15B, which is relatively shorter than the first joint portion 15A, can efficiently improve ease of opening on the one hand and the reliability of the packaging on the other. The second joint portion 15B in Figures 1 and 2 is joined at the peripheral edges 1b and 2b of the first sheet 1 and the second sheet 2. This configuration ensures a length (l) of the first joint 15A extending in a first direction in the width direction of the first sheet 1, thereby improving jointability and ease of opening. Furthermore, it is easy to determine a predetermined seal width and easy to manufacture. The second joint 15B can be provided in the central part of the laminated portion 10, excluding the ends 10c, 10d (peripheral edge 1b of the first sheet 1). The second joint 15B provided in the central part can be shorter than the second joint 15B at the ends 10c, 10d, and by utilizing multiple second joints 15B, the joint width (s1) of the first joint 15A can be made narrower.

[0035] Figure 2 shows that the joint width of the first joint 15A (s1, shown as a dashed line in the figure) is wider than the joint width of the second joint 15B (s2, shown as a solid line along with the ends 10c and 10d on both sides), that is, the joint width of the second joint 15B (s2) is narrower than the joint width of the first joint 15A (s1). By making the joint width of the first joint 15A (s1) relatively wider, along with the length of the first joint 15A extending in the first direction, it is possible to efficiently achieve both reliable packaging and easy opening. By making the joining width (s2) of the second joining portion 15B relatively narrower, the second joining portion 15B extends shorter in the second direction (Y-axis direction) and joins the first sheet 1 and the second sheet 2 at their periphery at both ends of the first joining portion 15A. This allows for efficient improvement of reliable packaging on the one hand, while suppressing a decrease in ease of opening on the other hand, thus achieving a more efficient balance between reliable packaging and easy opening. The joining width (s1) of the first joining portion 15A can be, for example, 1.5 times or more and 30 times or less the joining width (s2) of the second joining portion 15B, preferably 2 times or more and 20 times or less. This is because reliable packaging and easy opening can be achieved more efficiently. When multiple first joining portions 15A are provided, the distance between the first joining portions 15A at both ends becomes the joining width (s1). The joining widths (s1, s2) of the first joining portion 15A and / or the second joining portion 15B can be the same or different overall or partially. For example, the first joint 15A can be made easier to peel by providing a starting point and trigger for peeling, such as narrow sections, wide sections, or sections with fewer teeth, in the central part of the area where a finger is hooked and inserted. This improves ease of opening.

[0036] The joint 15 can join the first sheet 1 and the second sheet 2 by heat sealing, either entirely or partially. The joint width (s1) of the first joint 15A can be wider or narrower than the joint width (s2) of the second joint 15B, either entirely or partially. Figure 2 shows that the joint width (s2) of the second joint 15B is narrower than the joint width (s1) of the first joint 15A. In Figure 2, the joint 15 has the first joint 15A as a heat seal with a joint width (s1) and the second joint 15B as a heat-sealed joint with a joint width (s2). The heat-sealed second joint 15B can be melt-cut with a heat-sealing heater wire or the like to seal the ends 10c and 10d of the laminated portion 10 in a linear fashion, making the sealed portion thinner. This configuration achieves both ease of peeling (easy opening) and joint strength (packaging reliability) by firstly ensuring that the weak bonding strength of the heat-sealed second joint 15B does not hinder peeling or opening (easy opening); secondly, the presence of the second joint 15B makes it difficult for the unjointed portion 13 of the laminated portion 10 to spread beyond a certain range, creating a grip for the fingertips and allowing force to be efficiently applied in the direction of peeling the joint 15 (Z-axis direction); and thirdly, by extending the relatively wide bonding width (s1) of the first joint 15A in the first direction to a narrow width within the peelable range and securing the length. Furthermore, the second joint 15B of the heat-sealed second joint 15B provided at the ends 10c and 10d of the laminated portion 10 is easy to manufacture, and the second sheet 2 can be joined to the first sheet 1 at the same time as forming the first sheet 1 into a cylindrical tube, or it can be joined in a separate process. Heat seals can be applied using heating, electric current, ultrasound, etc., and include examples such as heat-cut seals, thermal fusion seals, ultrasonic seals, high-frequency seals, bar seals, rotary roll seals, sliding nip seals, and impulse seals. Heat seals are formed by heating with a heater to melt the sealing layers of a first sheet 1 and a second sheet 2, followed by pressurization and cooling to join and bond (thermal fusion). Heat seals allow for easy, inexpensive, and stable bonding strength to be determined by the joining width, length, area, and heating conditions (heating temperature, heating time, pressure, etc.), and enable easy peeling and opening.

[0037] In Figures 1 and 2, the joint 15 is arranged by connecting the first joint 15A and the second joint 15B in an H-shape. The first joint 15A in the figure continuously traverses the laminated section 10 and extends from one end 10c to the other end 10d. The second joint 15B in the figure intersects and connects with the first joint 15A at both ends (ends 10c and 10d of the laminated section 10), extending toward the end 1a of the first sheet 1 and the end 2a of the second sheet 2, forming a bag shape with the ends 1a and 2a as unjointed sections 13, thereby improving ease of opening and packaging reliability. The joint 15 can be in shapes other than H-shape, such as L-shape, U-shape, U-shape, cross shape, etc., and any of these can be combined.

[0038] Figures 9 to 11 illustrate other embodiments in which the laminated section 10 and the joint section 15 have different shapes and arrangements than those in Figure 1. In Figure 1, the laminated section 10 is a rectangle with width (w) and length (l), and the first joint section 15A is provided parallel to the side edges 10a and 10b, making the first laminated section 11 and the second laminated section 12 substantially the same shape and size. The laminated section 10 (first laminated section 11, second laminated section 12) can have shapes other than rectangles, and have different widths (w, w10, w20) and / or lengths (l) in whole or in part. In addition, the first joint section 15A can be provided non-parallel to both or one of the side edges 10a and 10b. For example, in Figure 9, the laminated section 10A (first laminated section 11) has a narrower width in the center (w3, w11) than the widths at both ends (w1, w2), making the first laminated section 11 narrower and thinner than the second laminated section 12. In Figure 10, the laminated section 10B has a wider width in the center (w4, w12) than the widths at both ends (w1, w2), making the first laminated section 11 wider than the second laminated section 12. In Figure 9, the laminated section 10A (first laminated section 11) can more effectively prevent and suppress the curling of the side edges 10a and the outer sheet (second sheet 2), and can also increase the degree of grip, improving the reliability and ease of opening of the packaging. In Figure 10, the laminated section 10B can increase the area for inserting and hooking fingertips, making it easier to hook, pull, and pinch, thus improving ease of opening. All or part of one or both side edges 10a, 10b of the laminated section 10 (10A, 10B) can be positioned above or below the line connecting the upper and lower ends (tips) of the second joints 15B on both the left and right sides (on the side closer to or further away from the first joint 15A). The laminated sections 10A, 10B in Figures 9 and 10 illustrate a different shape of the first laminated section 11 than that in Figure 1, but this also applies to the second laminated section 12. The shape of the second laminated section 12 can be the same as or different from the shape and size of the first laminated section 11, and both can be positioned symmetrically or asymmetrically on both sides of the first joint 15A. The laminated section 10 can be positioned closer to either side edge 10a, 10b of the first joint 15A. In Figure 11, the laminated section 10 has the first joint 15A positioned closer to the side edge 10b, and on one side edge 10a, there is a non-jointed section 13 where the inner first sheet 1 and the outer second sheet 2 are not joined, and the joint 15 is arranged in a roughly U-shape.The laminated portion 10 in Figure 11 has a larger surface area for inserting and hooking fingertips, making it easier to hook, pull, and pinch, thereby improving ease of opening. A non-jointed portion 13 can also be provided on the side edge 10b.

[0039] The width (w, w10, w20) of the laminated section 10 (first laminated section 11, second laminated section 12) can be, for example, 1 / 50 or more and 1 / 2 or less of the length (l), preferably 1 / 30 or more and 1 / 4 or less. For example, as illustrated in Figures 1, 9 to 11, the width (w) of the laminated section 10 can be narrowed to reduce costs, increase the grip strength of the non-jointed portion 13 of the side edge 10a, and improve the reliability of packaging by ensuring close contact between the first sheet 1 and the second sheet 2. Also, as illustrated in Figure 12, the width (w) of the laminated section 10 can be widened to make it easier to insert fingers into the non-jointed portion 13 of the side edge 10a, making it easier to hook, pull, and pinch, and to lengthen the second joint 15B, improving the reliability of packaging. The widths (w, w10, w20) of the laminated section 10 (first laminated section 11, second laminated section 12) in Figure 1 are less than or equal to the length (l) of the second sheet 2 in the second direction (Y-axis direction). The width (w) of the laminated section 10 in Figure 7 is smaller than the folded portion on the back surface 100A2 side, preventing the laminated section 10 from curling up while allowing the adhesive section 4 to be easily and reliably bonded.

[0040] The packaging material 100 of the bag 100A illustrated in Figures 1 to 3 has a first sheet 1 that is heat-sealed on both sides and the bottom to form a bag shape (flat bag), and a second sheet 2 is connected as a tab with tape to the top of the remaining side via a joint 15 of the laminated section 10. In the laminated section 10 in Figure 3, the first sheet 1 is placed on the inside and the second sheet 2 is placed on the outside, and the second sheet 2 is laminated on the outside of the first sheet 1. The unsealed bag 100A in Figures 2 and 3 can be sealed and opened after the contents are placed inside, as illustrated in Figures 4 to 6. (1) After filling the unsealed bag body 100A (Figure 3), the adhesive part 4, such as adhesive tape, can be folded back to the back side 100A2 and adhered to seal the opening 6 (Figure 4). (2) As shown in Figure 4, insert your fingertips into the non-joint portion 13 where the second sheet 2 and the first sheet 1 are not joined, starting from one side edge 10a of the laminated portion 10 (the lower side edge 10a in Figure 4), and pinch and grasp it, and lift up the second sheet 2 so that it separates from the first sheet 1 so that the joint portion 15 peels off. The joined second sheet 2 peels and separates from the first sheet 1 along the joint portion 15, and the opening 6 becomes open (Figure 5). Furthermore, the opening 6 of the bag-shaped surface 100A1 and back surface 100A2 (first sheet 1) can be widened to remove the contents (Figure 6).

[0041] After sealing, the packaging material 100 can have its joint portion 15 (laminated portion 10) positioned on the front surface 100A1 side (Figure 7) or the back surface 100A2 side (Figure 8). Figure 7 illustrates the case where the sealing of the packaging material 100 has the joint portion 15 positioned on the front surface 100A1 side. After storing the contents in the storage portion 5 of the unsealed bag body 100A (Figure 3), the tab with tape (adhesive portion 4) on the second sheet 2 above the laminate portion 10 is folded along the fold line between the laminate portion 10 and the adhesive portion 4, and the adhesive portion 4 is adhered to the back surface 100A2 side to seal it (Figure 7). To open this bag 100A, insert your fingertip between the second sheet 2 and the first sheet 1 from the non-joint portion 13 of one side edge 10a of the laminated portion 10 (the lower side edge 10a in Figure 7), and hook your fingertip onto the outer second sheet 2, gripping it between them. Then, peel up the second sheet 2 so that it separates from the first sheet 1, towards the left side (Z-axis direction), upper left, and upper side in Figure 7, so that the first joint portion 15A (joint portion 15) peels off (Figure 5). This configuration prevents the non-joint portion 13 from unintentionally peeling up because the non-joint portion 13 is located on the side away from the periphery (upper part) of the closed bag 100A, and the second sheet 2 is tightly joined to the first sheet 1 at the joint portion 15. Furthermore, when peeling off the joint 15 to open the bag, the surface 100A1 of the bag body 100A can be held down, and the non-jointed portion 13 can be hooked, pulled, and pinched up in the direction that is easiest to peel off, either from the peripheral (upper) side (Y-axis direction) or the Z-axis direction.

[0042] Figure 8 illustrates a case where the sealed packaging material 100 has the joint 15 positioned on the back surface 100A2 side. After storing the contents in the storage section 5 of the unsealed bag body 100A (Figure 3), the section below the stacked section 10 is used as a fold line, and the first sheet 1 below the stacked section 10, along with the tab with tape (adhesive section 4), is folded towards the back surface 100A2 side and sealed by bonding with the adhesive section 4 (Figure 8). The packaging material 100 can be folded with both the bag-shaped surface 100A1 and the back surface 100A2 towards the back surface 100A2 side, or the edge 1a of the first sheet 1 on the back surface 100A2 side can be lowered than the bag-shaped surface 100A1 side, allowing only the bag-shaped surface 100A1 to be folded towards the back surface 100A2 side. To open the sealed bag 100A shown in Figure 8, insert your fingertip between the second sheet 2 and the first sheet 1 from the non-joint portion 13 of one side edge 10a of the laminated portion 10 (the upper side edge 10a in Figure 8), and hook your fingertip onto the outer second sheet 2, gripping it between them. Then, peel the second sheet 2 away from the first sheet 1 in the direction of the right, lower right, and downward in Figure 8, so that the first joint portion 15A side (joint portion 15) peels off. The second sheet 2 is then peeled away from the first sheet 1 and the bag can be opened. The laminated portion 10 (joint portion 15) can be positioned on a different (Figure 7) or the same (Figure 8) surface as the adhesive surface of the adhesive portion 4. This configuration prevents unintentional peeling and opening from the surface 100A1 side, and on the back surface 100A2, the non-joint portion 13 is positioned near the periphery (upper part) of the closed bag body 100A, making it easy to hook a finger onto the non-joint portion 13 and pull it open.

[0043] This disclosure does not specify the shape, size, sheet material, type, presence and arrangement of heat-sealed or heat-sealed or heat-cut seals, position, width, or sealing method of the packaging material 100, but includes all packaging materials that package all or part of the contents. For example, the shape of the bag 100A can be a bottom-sealed bag, a side-sealed bag (two-sided sealed bag), a three-sided sealed bag, a four-sided sealed bag, a bottom-sealed bag, a gusseted bag, a flat bag, a pillow bag, a gusseted bag (bag with a gusset), a square-bottomed bag, a stand-up pouch, a standing pouch, or a three-dimensional packaging (three-dimensional bag). The packaging material 100 can be unsealed or sealed, and can have properties according to the contents. The laminated portion 10 and the joint portion 15 can be located at the top, middle, or bottom of the packaging material 100 (bag 100A), and can be extended in the horizontal direction (X-axis direction), vertical direction (Y-axis direction), and diagonal direction, and can be composed of straight lines, curves, or a combination of straight lines and curves. (Embodiment 2)

[0044] The packaging material of this disclosure is formed by joining a first sheet 1 and a second sheet 2, and can cover all or part of the contents. For example, packaging material 100 can cover all of the contents as a bag 100A (Embodiment 1), and packaging material 200 can cover all or part of the contents by being a covering 200A that covers one or more openings 8a of a storage container 8 that stores the contents, such as a box, case, or bag (Embodiment 2). Packaging materials 100 and 200 can cover all or part of the contents, such as rice balls or sandwiches, in a planar or three-dimensional manner. The description of Embodiment 1 is applicable to Embodiment 2 insofar as it does not contradict the properties.

[0045] Figures 13 to 15 show the packaging material 200 according to Embodiment 2. Figure 13 is a schematic perspective view of the packaging material 200, Figure 14 is an exploded perspective view of Figure 13, and Figure 15 is an enlarged cross-sectional view of the main part of Figure 13. The packaging material 200 is formed by joining a first sheet 1 and a second sheet 2 to create a three-dimensional shape that covers the opening surface 8a of the contents storage container 8. The storage container 8 has a shape, for example, a three-dimensional shape or a planar shape, that can be covered by the packaging material 200 to store the contents. In the packaging material 200 illustrated in Figure 14, strawberries are stored in a storage container 8 that opens upwards, and the opening surface 8a that opens upwards is covered with the packaging material 200 formed by joining the first sheet 1 and the second sheet 2 to package them. The above configuration, like Embodiment 1, has the feature of being able to package and protect the contents and being easy to open at the intended opening line.

[0046] In the packaging material 200 shown in Figures 13 to 15, the laminated portion 10 is positioned on the side. In the laminated portion 10 of Figure 14, the non-joint portion 13 for gripping is positioned upward, making it easy to apply force from above and efficiently transmit force in the peeling direction of the joint portion 15, thus achieving easy opening and allowing it to be opened easily with little force. However, the laminated portion 10 can also be positioned on the bottom surface of the storage container 8 or on the periphery of the opening surface 8a. The laminated portion 10 positioned on the bottom surface of the storage container 8 can prevent unintentional opening. Furthermore, the laminated portion 10 positioned on the periphery of the opening surface 8a of the storage container 8 can be easily opened by pulling the non-joint portion 13 toward the outer edge of the opening surface 8a or upward while the packaging material 200 is stationary.

[0047] Unlike industrial products, the strawberries shown in Figure 14 as an example of contents do not have identical sizes or shapes. Their arrangement, packaging, and appearance are reflected in their commercial value, requiring delicate handling and packaging. For example, if the packaging is too loose, the strawberries will shake and move, colliding with or contacting adjacent strawberries. If the packaging is too tight, the strawberries may be crushed, leading to a decrease in commercial value. The packaging material 200 can package the contents with the appropriate tension and position at the adhesive portion 4, and consumers can easily open it and remove the contents. The two (or more) adhesive portions 4 in Figures 13 to 15 are adhered to the bottom surface of the storage container 8. The adhesive position can be determined and adjusted according to the shape, size, and degree to which the contents protrude from the opening surface 8a of the storage container 8. The adhesive portion 4 can also be adhered to surfaces other than the bottom surface of the storage container 8, such as the sides. Note that the strawberries in Figure 14 are shown for illustrative purposes and to illustrate the specific details of this disclosure, and this disclosure does not specify the contents. For example, it broadly includes not only food items such as fruits, vegetables, fish, prepared foods, and bento boxes, but also non-food items such as mail and documents, and includes all contents that are packaged in packaging material 200 that requires easy opening. [Industrial applicability]

[0048] The packaging material of this disclosure has a simple structure and can be effectively used as an easy-open packaging material that can be easily opened along the intended opening line. [Explanation of Symbols]

[0049] 100, 200...Packaging material 100A…Bag body 100A1…Surface 100A2…Reverse side 200A…covering body 1…First sheet 1a...end 1b... Peripheral area 2…Second seat 2a...end 2b... Peripheral area 4...Adhesive part 5...Storage section 6…Opening 7…Occluded part 8…Storage containers 8a…Opening surface 10, 10A, 10B... Laminated section 10a, 10b...side edge 10c, 10d...end 11…First layer 12...Second layer 13...Non-joint part 14...Hook part 15…Joint part 15A…1st joint 15B…Second joint part

Claims

1. The first sheet and, A second sheet joined to the first sheet, The device comprises a laminated portion in which the first sheet and the second sheet are stacked, The aforementioned laminated portion is It has a joint portion that allows the first sheet and the second sheet to be joined in a peelable manner, At least one side edge of the laminated portion is not bonded to the first sheet or the second sheet arranged on the inside, A packaging material that can be opened by peeling off the aforementioned joint.

2. A packaging material according to claim 1, The joint portion of the laminated portion is A packaging material formed by linearly joining the first sheet and the second sheet.

3. A packaging material according to claim 1, The joint portion of the laminated portion is A packaging material comprising the first sheet and the second sheet laminated in a planar manner.

4. A packaging material according to claim 1, The aforementioned joint portion A first joint extending in a first direction, A packaging material having a second joint at both ends of the first joint, extending in a direction different from that of the first joint.

5. A packaging material according to claim 4, A packaging material in which the second joint joins the first sheet and the second sheet at their peripheral edges.

6. A packaging material according to claim 4, A packaging material in which the joining width (s1) of the first joining portion is wider than the joining width (s2) of the second joining portion.

7. A packaging material according to claim 1, A packaging material in which the joint portion is positioned in the center of the width direction (w) of the laminated portion.

8. A packaging material according to claim 1, At both side edges of the laminated portion, A packaging material having a non-jointed portion where the first sheet and the second sheet are not joined.

9. A packaging material according to any one of claims 1 to 8, The aforementioned joint is a packaging material in which the first sheet and the second sheet are joined by heat sealing.

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