Plastic packaging materials

Abstract

To provide a plastic packaging material that can be made thinner while improving the opening properties.SOLUTION: A plastic packaging material 100 composed of a tubular plastic film having an opening, includes: embossed parts E1 to E16 in which emboss is formed by selectively embossing the plastic film; and flat parts H1 to H6 of the plastic film, wherein the flat parts H1 to H6 are arranged so as to communicate with at least a part of the opening at an upper end M of the tubular plastic film extending in a longitudinal direction Y.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to plastic packaging materials. [Background technology]

[0002] For example, plastic packaging materials used in shopping bags and the like are becoming thinner year by year due to the global trend toward eliminating plastic.

[0003] The thinner the film thickness of such plastic packaging materials, the more susceptible they are to the effects of static electricity that is generated during film processing and transportation of the plastic packaging materials.

[0004] In particular, if the plastic films constituting the plastic packaging material are stuck together due to such static electricity, the opening ability of the plastic packaging material decreases (that is, it becomes difficult for the user to open the plastic packaging material).

[0005] For example, as shown in Figure 2A, there is an embossing device in which an engraved roll A having a surface HA with multiple protrusions is rotated in a rotational direction DA while a receiving rubber roll B is rotated in a rotational direction DB, and a tubular film F constituting a plastic packaging material is passed between the surface HA of the engraved roll A and the surface HB of the rubber roll B in the conveying direction D, thereby imparting unevenness to the surface of the tubular film F.

[0006] By using such an embossing device, the surface of a film constituting the plastic packaging material, for example, having a thickness of about 30 μm, is embossed to give it an uneven texture.

[0007] When a user opens the embossed plastic packaging material, the user's hand (fingers) will catch on the unevenness formed on the plastic packaging material, thereby improving the opening property of the plastic packaging material.

[0008] However, as plastic packaging materials become thinner (for example, when the thickness of the plastic film that makes up the plastic packaging material is thinned to about 10 μm), in the embossing process described above, as shown in Figure 2B, the cylindrical plastic film F pressed by the convex portions on the surface HA of the engraved roll A enters the concave portions on the surface HB of the rubber roll B, causing the overlapping films F to be pressed together at the embossed portions.

[0009] As a result, thinner plastic packaging materials may have reduced openability when embossed.

[0010] As described above, the above-mentioned conventional plastic packaging materials have a problem in that it is difficult to improve the opening property (bag opening property) of the plastic packaging materials while reducing their thickness. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] JP2008-13203A Summary of the Invention [Problem to be solved by the invention]

[0012] In view of the problems with the conventional technology, the present invention has an object to provide a plastic packaging material that can be made thinner while improving the ease of opening the bag. [Means for solving the problem]

[0013] A plastic packaging material according to an embodiment of the present invention comprises: A plastic packaging material made of a cylindrical plastic film having an opening, An embossed portion formed by selectively embossing the plastic film; a flat portion of the plastic film; The flat portion is disposed so as to communicate with at least a part of the opening at the upper end of the cylindrical plastic film extending in the vertical direction. It is characterized by:

[0014] In the plastic packaging material, The flat portion is a portion of the plastic film that is not embossed, or a portion of the plastic film that is embossed and / or has less unevenness than the embossed portion. It is characterized by:

[0015] In the plastic packaging material, In a state before the plastic packaging material is opened, In a central region extending along the longitudinal direction in a central portion of the plastic packaging material, the plastic film is arranged so that two layers are overlapped, In a left region of the plastic packaging material extending along the longitudinal direction adjacent to the left side of the central region, four plastic films are arranged to overlap each other, In a right region of the plastic packaging material that is adjacent to the right side of the central region and extends along the longitudinal direction, four plastic films are arranged to overlap each other. It is characterized by:

[0016] In the plastic packaging material, The cylindrical plastic film has handles provided at upper ends of the left and right regions, respectively, so as to extend in the vertical direction, and the handles are adapted for a user to hold the cylindrical plastic film. It is characterized by:

[0017] In the plastic packaging material, The flat portion is a central flat portion located in the central region, extending longitudinally and communicating with the opening; It is characterized by:

[0018] In the plastic packaging material, The flat portion is a left flat portion located in the left region and extending in the longitudinal direction; and a right flat portion located in the right region and extending in the vertical direction.

[0019] In the plastic packaging material, The flat portion is an upper flat portion located on upper end sides of the left side region and the right side region, extending in the lateral direction, and communicating with the opening; a lower flat portion located on lower end sides of the left region, the right region, and the central region and extending in the lateral direction; a middle flat portion located between the upper flat portion and the lower flat portion and extending in the lateral direction. It is characterized by:

[0020] In the plastic packaging material, The width of the central flat portion is set to be wider than the width of the left flat portion and the width of the right flat portion. It is characterized by:

[0021] In the plastic packaging material, The width of the central flat portion is set to be wider than the width of the upper flat portion, the width of the middle flat portion, and the width of the lower flat portion. It is characterized by:

[0022] In the plastic packaging material, The intervals at which the central flat portion is disposed relative to the left flat portion and the right flat portion are set within a preset reference interval. It is characterized by:

[0023] In the plastic packaging material, The interval at which the upper flat portion and the middle flat portion are arranged is set within the reference interval. It is characterized by:

[0024] In the plastic packaging material, The plastic film is characterized in that its thickness is 15 μm or less. In the plastic packaging material, The plastic packaging material is characterized in that it is a plastic bag.

[0025] In the plastic packaging material, an upper seal portion that seals an upper end of the handle portion; and a lower seal portion that seals the lower end of the cylindrical plastic film. It is characterized by: Effect of the Invention

[0026] According to a plastic packaging material according to one aspect of the present invention, the plastic packaging material can be made thinner while improving its ease of opening (i.e., making it easier for a user to open the plastic packaging material). [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is a diagram showing an example of the appearance of a plastic packaging material 100 according to an embodiment of the present invention. [Figure 2A] FIG. 2A is a schematic diagram showing an example of a process for embossing a tubular film constituting a plastic packaging material. [Figure 2B] FIG. 2B is a schematic diagram showing an example of a configuration in which the region Q shown in FIG. 2A is enlarged. BEST MODE FOR CARRYING OUT THEINVENTION

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0029] First, referring to the drawings, a plastic packaging material that is applied to a shopping bag or the like will be described as an example of a plastic packaging material according to an embodiment. However, the plastic packaging material according to this embodiment is not limited to the example of a shopping bag described below, and can also be applied to other bags, rolls, sheet rolls, and the like.

[0030] Here, Fig. 1 is a diagram showing an example of the appearance of a plastic packaging material 100 according to an embodiment of the present invention. Note that the configuration of the plastic packaging material 100 illustrated in Fig. 1 is a schematic representation of its components, and the sizes of the components may not necessarily match the numerical scales specifically illustrated in the following description.

[0031] [Plastic packaging materials] For example, as shown in Fig. 1, the plastic packaging material 100 according to this embodiment is a plastic bag having an opening and made of a tubular plastic film extending in the vertical direction Y. Note that the plastic packaging material 100 shown in Fig. 1 is in a folded state before being opened.

[0032] Here, before the plastic packaging material 100 is opened, in a central region B extending along the longitudinal direction Y in the central portion of the plastic packaging material, two plastic films are arranged so as to overlap each other.

[0033] Furthermore, before the plastic packaging material 100 is opened, in the left side region RA extending along the longitudinal direction Y adjacent to the left side of the central region RB of the plastic packaging material 100, the plastic films are arranged so that four sheets are overlapped.

[0034] Furthermore, before the plastic packaging material 100 is opened, in a right region RC extending along the longitudinal direction Y adjacent to the right side of the central region RB of the plastic packaging material 100, four plastic films are arranged so as to overlap each other.

[0035] The thickness of each plastic film constituting this plastic packaging material 100 is, for example, 15 μm or less (more preferably, it is envisaged that the thickness will be in the range of 4 μm to 7 μm).

[0036] Here, for example, as shown in FIG. 1, the plastic packaging material 100 includes a plurality of embossed portions E1 to E16, a plurality of flat portions H1 to H6, two handle portions MA, MB, an upper sealed portion SA, and a lower sealed portion SB.

[0037] [Embossed part] The plurality of embossed portions E1 to E16 are portions in which embossing is formed by selectively embossing the plastic film.

[0038] [Flat area] The flat portions H1 to H6 are non-embossed portions of the plastic film. The flat portions H1 to H6 may be embossed portions having smaller irregularities than the embossed portions E1 to E16 of the plastic film and / or having smaller irregularities than the embossed portions E1 to E16.

[0039] The flat portions H1 to H6 are arranged so as to communicate with at least a part of the opening at the upper end M of the cylindrical plastic film extending in the longitudinal direction Y.

[0040] As shown in FIG. 1, the flat portions H1 to H6 include, for example, an upper flat portion H1, a lower flat portion H3, a middle flat portion H2, a left flat portion H4, a central flat portion H5, and a right flat portion H6.

[0041] And, the central flat portion H5 is located in the central region RB, extends in the vertical direction Y, and communicates with the opening, as shown in FIG.

[0042] 1, the left flat portion H4 is located in the left area RA and extends in the longitudinal direction Y.

[0043] The right flat portion H6 is located in the right region RC and extends in the longitudinal direction Y.

[0044] The upper flat portion H1 is located on the upper end M side of the left region RA and the right region RC, extends in the lateral direction X, and communicates with the opening M.

[0045] The lower flat portion H3 is located on the lower end N side of the left region RA, the right region RC, and the central region RB, and extends in the lateral direction X.

[0046] The middle flat portion H2 is located between the upper flat portion H1 and the lower flat portion H3 and extends in the lateral direction X.

[0047] As shown in FIG. 1, the width D5 of the central flat portion H5 is set to be larger than the width D4 of the left flat portion H4 and the width D6 of the right flat portion H6.

[0048] Furthermore, the width D5 of the central flat portion H5 is set to be wider than the width D1 of the upper flat portion H1, the width D2 of the middle flat portion H2, and the width D3 of the lower flat portion H3, for example, as shown in FIG.

[0049] The width D5 of the central flat portion H5 is, for example, about 20 mm. The width D4 of the left flat portion H4 and the width D6 of the right flat portion H6 are, for example, about 10 mm. The width D1 of the upper flat portion H1, the width D2 of the middle flat portion H2, and the width D3 of the lower flat portion H3 are, for example, about 10 mm.

[0050] 1, the distance D7 between the central flat portion H5 and the right flat portion H6 is set within a preset reference distance (e.g., about 60 mm). Similarly, the distance between the central flat portion H5 and the left flat portion H4 is also set within a preset reference distance (e.g., about 60 mm).

[0051] 1, the distance D8 between the upper flat portion H1 and the middle flat portion H2 is set within the above-mentioned reference distance (e.g., about 60 mm). Similarly, the distance between the lower flat portion H3 and the middle flat portion H2 is set within the above-mentioned reference distance (e.g., about 60 mm).

[0052] [Handle] The two handles MA and MB are provided, for example as shown in FIG. 1, at the upper ends M of the left region RA and right region RC of the cylindrical plastic film, extending in the vertical direction Y, and are intended for the user to hold.

[0053] [Sealing part] The upper seal portion SA is a portion that seals the upper ends of the two handle portions MA and MB, as shown in FIG.

[0054] The lower seal portion SB is a portion that seals the lower end N of a cylindrical plastic film, for example, as shown in FIG.

[0055] As described above, in the plastic packaging material 100 according to this embodiment, a plurality of embossed portions E1-E16 and a plurality of non-embossed flat portions H1-H6 are simultaneously produced, thereby generating a friction difference within the plane of the plastic film and improving the opening property. As described above, even if the plurality of flat portions H1-H6 are embossed portions having smaller irregularities than the embossed portions E1-E16 of the plastic film and / or have less irregularities than the embossed portions E1-E16, it is possible to improve the opening property by generating a friction difference within the plane of the plastic film.

[0056] In particular, after the flat portions H1 to H6 are partially opened, the flat portions H1 to H6 become air passages, and the embossed portions E1 to E16, which have a high degree of adhesion, also become easily opened.

[0057] Typically, when a user attempts to open a plastic packaging material 100 which is a shopping bag, it is expected that the user will attempt to open it by pinching the central flat portion H5 of the central region RB near the opening at the upper end M of the plastic packaging material 100 with their fingers and shifting it.

[0058] Therefore, as described above, a central flat portion H5 that is not embossed and has a width of, for example, about 20 mm is provided to correspond to the width of a user's finger, and the other upper flat portion H1, lower flat portion H3, middle flat portion H2, left flat portion H4, and right flat portion H6 have a width of about 10 mm.

[0059] Furthermore, as described above, in the horizontal direction (the width direction of the cylindrical plastic film) X, lines that are not embossed are provided at intervals within a preset reference interval (for example, about 60 mm) to improve opening properties.

[0060] In applying this technology to plastic shopping bags, the important point is to provide flat areas that are not embossed in the pitch direction of the handles (folded parts) MA and MB.

[0061] As described above, in the handle portions MA and MB, four layers of plastic film are overlapped, and the unevenness of the embossing causes the four sheets of plastic film to adhere closely to each other, making this the portion with the lowest openability.

[0062] Therefore, by providing handle portions MA, MB with an upper flat portion H1, a left flat portion H4, and a right flat portion H6 that are not embossed, as shown in Figure 1, for example, air that enters from the partially open central flat portion H5 can reach the unembossed flat portions of handle portions MA, MB through the unembossed middle flat portion H2 in the horizontal direction X, etc., causing the four tightly adhered branches of plastic film to separate, and the plastic packaging material 100 to be entirely opened.

[0063] In this way, the flat portion that has not been embossed (or has been embossed with less unevenness than the embossed portions E1 to E16 of the plastic film and / or has less unevenness than the embossed portions E1 to E16) becomes the part where the overlapping plastic films shift and becomes the starting point when the user tries to open it.By starting to open the package from this part, air gets in between the tubular plastic films, making it easier for the overlapping plastic films to peel off (i.e., it becomes easier for the user to open the plastic packaging material).

[0064] As described above, according to the plastic packaging material of this embodiment, it is possible to make the plastic packaging material thinner while improving its openability (i.e., making it easier for the user to open the plastic packaging material).

[0065] As described above, in the embodiment, a plastic packaging material applied to a shopping bag etc. has been described as an example of a plastic packaging material. However, the plastic packaging material according to this embodiment is not limited to the example of a shopping bag described in the embodiment, and can be applied to other bags, rolls, sheet rolls, etc.

[0066] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents as described in the claims, as well as in the scope and spirit of the invention. [Explanation of symbols]

[0067] 100 plastic bags E1~E16 Multiple embossed parts H1~H6 Multiple flat areas MA Handle MB Handle SA Upper seal part SB Lower seal part H1 Upper flat part H2 middle flat part H3 Lower flat part H4 Left side flat area H5 central flat area H6 Right side flat part A Engraving Roll HA surface B Rubber roll HB surface D Conveying direction DA Rotation Direction DB Rotation Direction F Cylindrical film

Claims

1. A plastic packaging material made of a cylindrical plastic film having an opening, An embossed portion formed by selectively embossing the plastic film; a flat portion of the plastic film; the flat portion is arranged to communicate with at least a part of the opening at an upper end of the cylindrical plastic film extending in a vertical direction, In a state before the plastic packaging material is opened, In a central region extending along the longitudinal direction of the central portion of the plastic packaging material, two sheets of the plastic film are arranged to overlap each other, In a left region of the plastic packaging material that is adjacent to the left side of the central region and extends along the longitudinal direction, four plastic films are arranged to overlap each other, In a right side region of the plastic packaging material that is adjacent to the right side of the central region and extends along the longitudinal direction, four plastic films are arranged to overlap each other, A handle portion for a user to hold is provided at an upper end of the left region and the right region of the cylindrical plastic film so as to extend in the vertical direction, The flat portion is a central flat portion located in the central region, extending in a longitudinal direction and communicating with the opening; a left flat portion located in the left region and extending in the longitudinal direction; a right flat portion located in the right region and extending in the longitudinal direction; an upper flat portion located on the handle portion at the upper end side of the left side region and the right side region, extending laterally and communicating with the left side flat portion, the right side flat portion, and the opening; a lower flat portion located at lower ends of the left region, the right region, and the central region, extending in the lateral direction, and communicating with the left flat portion, the central flat portion, and the right flat portion; a middle flat portion located between the upper flat portion and the lower flat portion, extending in the lateral direction and communicating with the left flat portion, the central flat portion, and the right flat portion; The thickness of the plastic film is 15 μm or less, The flat portion is a portion of the plastic film that is not embossed, or a portion of the plastic film that is embossed and has smaller projections and recesses than the embossed portion and / or has smaller projections and recesses than the embossed portion, The portion other than the flat portion is the embossed portion. A plastic packaging material characterized by:

2. The handle portion includes the upper flat portion, a part of the left flat portion, a part of the right flat portion, and the embossed portion adjacent to the upper flat portion, the part of the left flat portion, and the part of the right flat portion.

2. The plastic packaging material according to claim 1.

3. The handle portion is made of four layers of the plastic film, and the four layers of plastic film are tightly adhered to each other due to the unevenness of the embossing, making it the part with the lowest opening property.

2. The plastic packaging material according to claim 1.

4. By providing the handle portion with the upper flat portion, the left flat portion, and the right flat portion, air entering from the partially opened central flat portion passes through the middle flat portion that is not embossed in the horizontal direction and reaches the flat portion of the handle portion that is not embossed, and the four closely attached plastic films are separated from each other, so that the plastic packaging material is entirely opened.

4. The plastic packaging material according to claim 3.

5. The flat portion becomes the portion where the overlapping plastic films shift, and serves as a starting point when a user tries to open the lid. By opening the lid starting from this portion, air gets in between the cylindrical plastic films, making it easier for the overlapping plastic films to peel off from each other.

5. The plastic packaging material according to claim 4.

6. The plastic packaging material is a plastic shopping bag.

2. The plastic packaging material according to claim 1.

7. The width of the central flat portion is set to be wider than the width of the left flat portion and the width of the right flat portion.

2. The plastic packaging material according to claim 1.

8. The interval between the central flat portion that is not embossed and the left flat portion and the right flat portion that are not embossed is set within a predetermined reference interval in order to improve opening property.

8. The plastic packaging material according to claim 7.

9. The interval between the upper flat portion not subjected to embossing and the middle flat portion not subjected to embossing is set within the reference interval in order to improve opening property.

9. The plastic packaging material according to claim 8.

10. 4. The plastic packaging material according to claim 3, wherein the plastic packaging material is a plastic bag.

11. an upper seal portion that seals an upper end of the handle portion; and a lower seal portion that seals the lower end of the cylindrical plastic film.

11. The plastic packaging material according to claim 10.

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