JP2015140188A - Cushion envelope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushion envelope capable of being opened easily with a simple structure.SOLUTION: A folding part 4 is provided by being extended on at least one side of an opening 3 disposed on an end of a storage part 2, and at least part of the folding part has an air bubble sheet having a cap film having a cap-state projection and a back film loaded to an open side of the projection, and one of the layers forming the air bubble sheet has cyclic polyolefin copolymer of 10-40%, added thereto.

Description

  The present invention relates to a buffer envelope having a bubble sheet.

  In recent years when mail order is popular, buffer envelopes are often used for the packaging. And in such a buffer envelope, in order to cope with the present situation where the kind of contents to be packed, such as a CD case that is easy to break from a heavy book, is suitable for a wide variety of situations, there are many configurations in which a bubble sheet is arranged in the interior. (See, for example, Patent Document 1).

  By the way, not only the above-mentioned buffer envelope but generally when opening the envelope, to break the folded portion that extends at least one of the opening provided at the end portion of the bag-like storage portion for storing the contents Is usually done. However, in the buffer envelope as described above, due to the elongation of the material constituting the bubble sheet, it is difficult to break the folded portion where the bubble sheet is arranged as it is with bare hands and open the buffer envelope. For this purpose, a technique has been adopted in which an opening tape is previously attached by processing so that the folded portion is easily broken.

  That is, in the present situation as described above, the number of materials constituting the buffer envelope is increased by adding a material such as a tape for opening as an element of the buffer envelope so that it is easy to open, and the tape for opening in the manufacturing process accordingly. This includes the problem of compulsory requirements that lead to an increase in cost, such as an increase in the number of components to be attached.

JP 2005-53551 A

  The present invention pays attention to such a current situation, and the present invention provides a buffer envelope that can be easily opened without using a different material such as an opening tape that causes an increase in cost. It is aimed.

  In order to achieve such an object, the present invention takes the following measures.

  That is, the shock-absorbing envelope according to the present invention is a shock-absorbing envelope in which a folded portion is provided to extend at least one of the openings provided at the end portion of the accommodating portion, and a cap-shaped envelope is provided on at least part of the folded portion. It includes a bubble sheet provided with a cap film having protrusions and a back film attached to the open side of the protrusions, and 10 to 40% of a cyclic polyolefin copolymer is added to any one layer constituting the bubble sheet. It is characterized by.

  Here, the bubble sheet is not limited to a two-layer structure including a cap film and a back film, and may be a three-layer structure including a liner film or a multilayer structure having a multilayer structure.

  In such a case, the air bubble sheet itself is excellent in straight cut performance, and contributes to easy opening with a bare hand and in a desired direction as compared with the conventional one. As a result, according to the present invention, it is possible to provide a buffer envelope that can be easily opened with bare hands without using an opening tape that causes an increase in cost due to an increase in the number of materials and manufacturing processes.

  In order to facilitate easier opening, it is desirable to provide a grip allowance for the user's finger to easily grasp a part of the folded portion. As a specific configuration of such a grip allowance, an aspect in which two or more cuts extending along the edge of the opening are provided in at least one of the side edges perpendicular to the extending direction of the folded portion where the bubble sheet is disposed. First of all.

  In addition, as another aspect in which the above-described gripping margin is provided, an aspect in which punching having two or more sides extending along the edge of the opening is provided in at least one of the folded portions including the bubble sheet. be able to. Here, the punching shape is easy for the user to pick if it is, for example, a U-shape, but is not limited to the U-shape, and may be a C-shape or V-shape. Moreover, it is good also as the punching provided in the shape of a perforation in the direction following a U-shaped punching and cutting.

  Furthermore, in order to prevent the portion gripped by the pulling force applied at the time of opening from being unexpectedly broken, the inside of the housing portion is made invisible on the outer side opposite to the inner surface side facing the housing portion in the bubble sheet. When the layer having colored film, paper, or metal foil is attached as the outermost layer, it will be a reinforcement when grasping the bubble sheet at the time of opening.

  Further, when the outermost layer is a single layer or multilayer film, at least one layer of the outermost layer is constituted, and at least one layer is a film in which 20 to 40% high density polyethylene and 60 to 80% calcium carbonate are blended. If this is the case, since the film itself has a straight cut property, the buffer envelope can be opened more easily and reliably.

  According to the present invention, according to the present invention, a special tool such as a bag is not required for opening, and no opening tape that causes an increase in cost due to an increase in the number of materials and manufacturing processes is used. In addition, it is possible to provide a buffer envelope that can be easily opened with bare hands.

The perspective view of the buffer envelope which concerns on 1st embodiment of this invention. The other perspective view which concerns on the same embodiment. FIG. 3 is an enlarged end view taken along line AA according to FIG. 2. The top view of the principal part which concerns on the same embodiment. FIG. 5 is an operation explanatory diagram according to FIG. 4. The figure which shows the modification of the embodiment corresponding to FIG. The figure which shows the other modification of this invention corresponding to FIG. Action explanatory drawing which concerns on FIG. The figure which shows the further another modification of this invention corresponding to FIG.

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

  As shown in FIGS. 1 to 5, the buffer envelope 1 according to the present embodiment is for packing and sealing the contents at the time of delivery by mail or mail order, for example.

  The buffer envelope 1 is mainly composed of a material in which the bubble sheet 10 and the outermost surface film 16 are bonded together, and stores contents such as a case for storing media such as books and CDs (compact discs). A housing portion 2 for opening and closing, and an opening portion 3 for putting contents into and out of the housing portion 2 and a folded portion 4 for closing the opening portion 3.

  The storage unit 2 cuts the material obtained by bonding the air bubble sheet 10 and the front film 16 along the flow direction of the air bubble sheet 10 with a predetermined dimension in the longitudinal direction, and bonds the cut portions. Formed by. That is, the accommodating part 2 has the adhesion | attachment side edge 2a to which the both edges in the flow direction laminated | stacked when the raw material was folded back were adhere | attached, and the folding | turning bottom part 2b provided by folding the raw material. However, it is needless to say that the configuration is not limited to the illustrated one, and the bottom portion may be provided by bonding in the same manner as the bonding side edge 2a.

  The opening 3 is an opening formed on the side of the accommodating portion 2 that faces the folded bottom 2b. By forming one material from the opening so as to extend more than the other, the extended portion is used as the folded portion 4.

  The folded portion 4 is for closing the opening 3 by folding the vicinity of the opening 3, in other words, for sealing the shock-absorbing envelope 1, and the edge is bonded by extending in the width direction from the opening 3. In the present embodiment, two cuts 5 are provided in each of the side edges 4a, that is, both side edges 4a in this embodiment, and the opening 3 is kept closed at the tip side of the cuts 5. A pressure-sensitive adhesive tape 7 is provided. The pressure-sensitive adhesive tape 7 extends in a strip shape over substantially the entire region in the flow direction, and includes a pressure-sensitive adhesive 7a attached to the bubble sheet 10 and a release paper 7b layered on the pressure-sensitive adhesive 7a. , So-called normal. The pressure-sensitive adhesive tape 7 is used to close the opening 3 by pressing the pressure-sensitive adhesive 7a exposed to the housing portion 2 side in a state where the release paper 7b is peeled off, in other words, to seal the buffer envelope 1. Detailed description of the specific configuration and properties of the adhesive tape 7 will be omitted.

  Thus, the buffer envelope 1 according to the present embodiment includes a bubble sheet 10 including a cap film having a cap-shaped protrusion on at least a part of the folded portion 4 and a back film attached to the open side of the protrusion, 10 to 40% of cyclic polyolefin copolymer is added to any one layer constituting the bubble sheet 10, for example, all layers constituting the bubble sheet 10 in this embodiment.

  Hereinafter, the bubble sheet 10 and the front film 16 constituting the material that is the main body of the buffer envelope 1 will be described.

  The bubble sheet 10 is a hollow sheet having flexibility and is made of a synthetic resin. Specifically, as shown in FIG. 3, the bubble sheet 10 includes a cap film 11 having a large number of cap-shaped protrusions 13, a back film 12 attached to the cap film 11 on the opening side of the protrusions 13, and the back film. 12 comprises a liner film 15 attached to the cap film 11 from the opposite side. The bubble sheet 10 has a three-layer structure including a cap film 11, a back film 12, and a liner film 15.

  The cap film 11 preferably has a thickness dimension of 20 μm to 120 μm. The cap film 11 has a large number of columnar protrusions 13, and each protrusion 13 has a circular shape in plan view as shown in FIG. 2.

  As shown in FIG. 3, the back film 12 preferably has a thickness dimension of 8 μm to 50 μm. The back film 12 is flat without irregularities, and is attached to the side of the cap film 11 where the protrusions 13 are opened, whereby a large number of sealed bubbles 14 are formed.

  As shown in FIG. 1, the bubble 14 has a cylindrical shape with a low shape, and has a diameter of about 6 mm to 50 mm and a height of about 2 mm to 30 mm. In addition, the diameter of the bubble 14 is preferably 6.5 mm to 12 mm, and the height of the bubble 14 is preferably 2 mm to 6 mm. The bubbles 14 are arranged in a staggered pattern in the flow direction, but are arranged in a straight line in the width direction.

  The liner film 15 is thinner than 200 μm, and the thickness dimension is preferably 5 μm to 30 μm. The liner film 15 is flat and has no irregularities, and is attached to the tip end side of the protrusion 13 of the cap film 11.

  Thus, the air bubble sheet 10 of the present embodiment is easy to cut in the flow direction by adding, for example, 10 to 40% of the cyclic olefin copolymer to the cap film 11, the back film 12, and the liner film 15. . Specifically, the back film 12 contains 10 to 40% of a cyclic olefin copolymer and 60 to 90% of low density polyethylene having an MFR value of 2 to 15.

  And the surface film 16 is stuck to the outer surface side of the said bubble sheet 10, and is made into the colored film which becomes impossible to visually recognize the inside of the accommodating part 2. FIG. Specifically, in this embodiment, for example, a film containing 20 to 40% high density polyethylene and 60 to 80% calcium carbonate is applied. Further, the front film 16 according to the present embodiment is not limited to a single layer, that is, the outermost layer as the front film 16 is to make the inside of the housing portion 2 invisible on the outer surface side of the bubble sheet 10. In addition to the above colored film, paper or metal foil may be used, or a multilayer structure in which the paper or metal foil is laminated may be used. Of course, not only paper and metal but also a film in which different resins are formed by multi-layer extrusion or other laminated films may be used as the outermost layer.

  Therefore, in this embodiment, as shown in FIGS. 4 and 5, two cuts 5 extending along the edge of the opening 3 are provided on at least one of the side edges 4 a orthogonal to the extending direction of the folded portion 4. ing. A portion sandwiched between the two cuts 5 can be used as a “pick allowance”.

In addition, by applying the air bubble sheet 10 as described above, in the present embodiment, the cap film 11, the back film 12, and the liner film 15 are all incompatible with the low density polyethylene. The cyclic olefin copolymer concerned is scattered in the form of fine islands randomly. With such a configuration, because the boundary between the low-density polyethylene and cyclic olefin copolymer is weak, the time to be torn in the flow Re direction the boundary preferentially destroyed with low density polyethylene and an island-like cyclic olefin copolymer Then, the acting force to be destroyed is destroyed while propagating one after another to the boundary adjacent to the flow direction. As a result, the air bubble sheet 10 according to the present embodiment has obtained excellent straight cut performance that does not deviate from the tearing direction, in other words, the flow direction that is the load direction.

  Furthermore, with respect to the front film 16 as well, in the present embodiment, by applying a film containing 20 to 40% high-density polyethylene and 60 to 80% calcium carbonate, it contributes to further improvement of straight cut performance.

  As a result, as shown in FIG. 5, the portion sandwiched between the notches 5 is torn straight along the flow direction of the bubble sheet 10 as it is, and the folded portion 4 has the front end side on which the adhesive tape 7 is disposed and the opening 3. It is divided into a base end side that is a side. In other words, smooth opening of the buffer envelope 1 is realized.

  By setting it as the above structures, the buffer envelope 1 which concerns on this embodiment makes it easier and the desired direction by bare hands than the conventional thing by making the bubble sheet 10 itself excellent in the straight cut property. It will contribute to the opening of. As a result, the buffer envelope 1 that can be easily opened with bare hands is realized without using an opening tape that causes an increase in cost due to an increase in the number of materials and manufacturing processes.

  In the present embodiment, in order to facilitate easier opening, a grip allowance is provided in the folded portion 4 so that the user's fingers can easily grasp a part of the folded portion 4. That is, in this embodiment, two notches 5 extending along the edge of the opening 3 are provided in at least one of the side edges 4a orthogonal to the extending direction of the folded portion 4 in which the bubble sheet 10 is arranged as a grip allowance. ing.

  Further, in this embodiment, in order to prevent the portion grasped by the pulling force applied at the time of opening from being unexpectedly broken, the accommodating portion 2 is provided on the outer side of the bubble sheet 10 opposite to the inner surface side facing the accommodating portion 2. By sticking a colored film for making the inside invisible, it is used as a reinforcement when the folded portion 4 is gripped with fingers during opening.

  In the present embodiment, the front film 16 is a film in which 20 to 40% high density polyethylene and 60 to 80% calcium carbonate are blended. Therefore, the front film 16 itself is cut straight like the bubble sheet 10. Therefore, it contributes to easier and more reliable opening of the buffer envelope 1.

<Modification>
Below, each modification of this embodiment is shown and demonstrated to FIGS. About each modification below, the same code | symbol shall be attached | subjected with respect to what is corresponded to the component in the said embodiment, and the detailed description shall be abbreviate | omitted.

  The buffer envelope 1 shown in FIG. 6 according to this modification is provided with a punch 6 instead of the cut 5 shown in the above embodiment. Specifically, the U-shaped punching 6 having two or more sides extending along the edge of the opening 3 is provided in the vicinity of both side edges 4 a of the folded portion 4. As a result, the portion that is cut and raised by the U-shaped punching 6 can be used as a “grip allowance” similar to the above embodiment, which contributes to the smooth opening of the buffer envelope 1 as in the above embodiment.

The course has been assumed bubbles sheet 10 of a so-called three-layer structure in the above embodiments and variations, as shown in FIGS. 7 and 8 may be one using a bubble sheet 10a forming a two-layer structure. In this case, as shown in the figure as an example, the back film 12 is exposed on the inner surface side of the housing portion 2 and the folded portion 4, and the cap film is interposed between the back film 12 and the outermost surface film 16. 11 and the protrusion 13 are arranged. However, of course, the embodiment is not limited to that shown in the figure, and the cap film 11 and the protrusion 13 may be exposed on the inner surface side of the housing portion 2 and the folded portion 4.

Of course, since the cyclic olefin copolymer is contained in the cap film 11 and the back film 12, it is possible to effectively ensure easy cutability in the flow direction as in the first embodiment. That is , it contributes to the smooth opening of the shock-absorbing envelope 1 as in the above-described embodiments and modifications.

  Further, in the above-described embodiment and each modified example, a mode using a bubble sheet 10 formed with a circular shape in plan view, specifically, a cylindrical bubble 14 (projection 13) is disclosed. ) Is not limited to a cylindrical shape, and can be variously changed.

  That is, the bubble sheet 10 constituting the buffer envelope 1 according to this modification is provided with the bubbles 14a (projections 13a) having a rectangular shape in plan view. Moreover, according to this modification, since each bubble 14a becomes the structure located in a line along the flow direction, it contributes to the further improvement of the straight cut property of a flow direction. Even such a thing contributes to the smooth opening of the shock-absorbing envelope 1 as in the above-described embodiments and modifications.

  Although the embodiment of the present invention has been described above, the specific configuration of each unit is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, although only the main aspects of the bubble sheet have been disclosed in the above embodiment, of course, any additive in the bubble sheet, such as a colorant, a filler, an antioxidant, an antistatic agent, an antibacterial agent, is manufactured. Agents, combustion aids, etc. may be added. Also, the arrangement of the bubbles (projections, cavities) can be variously changed. In addition, the front film can be variously modified in accordance with the application to be used and the required performance, in addition to a film which can be directly printed on the buffer envelope by providing a paper layer on the outer surface.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  The present invention can be used as a buffer envelope having a bubble sheet.

DESCRIPTION OF SYMBOLS 1 ... Buffer envelope 10, 10a ... Bubble sheet 11 ... Cap film 12 ... Back film 15 ... Liner film 16 ... Outermost layer (surface film)
4 ... folded portion 4a ... side edge 5 ... notch 6 ... punching

Claims (5)

A shock-absorbing envelope provided by extending a folded portion in at least one of the openings provided at the end of the accommodating portion,
Including a cap film having a cap-like protrusion on at least a part of the folded portion and a bubble sheet provided with a back film attached to the open side of the protrusion,
A shock-absorbing envelope, wherein 10 to 40% of a cyclic polyolefin copolymer is added to any one layer constituting the bubble sheet. The shock-absorbing envelope according to claim 1, further comprising two or more cuts extending along the edge of the opening at at least one of the side edges perpendicular to the extending direction of the folded portion where the bubble sheet is arranged. The shock-absorbing envelope according to claim 1, further comprising: a punched portion having two or more sides extending along an edge of the opening at at least one portion of the folded portion including the bubble sheet. The shock-absorbing envelope according to claim 1, 2 or 3, wherein an outermost layer comprising a colored film, paper, or metal foil for making the inside of the housing portion invisible is provided on the outer surface side of the bubble sheet. The outermost layer is a monolayer or multilayer film;
5. The buffer envelope according to claim 4, wherein at least one layer is a film containing 20 to 40% high density polyethylene and 60 to 80% calcium carbonate.

Images