JP2006089104A - Cushioning rectangular-bottomed bag and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cushioning rectangular-bottomed bag that is easy to manufacture and is very excellent in recycle performance since a rectangular-bottomed bag body and an bubble sheet bag can be peeled and separated easily with a small force after use without deteriorating cushioning performance, by minimizing the heat seal part of a bubble sheet that is easily affected in cushioning performance, and to provide a manufacturing method thereof. <P>SOLUTION: The cushioning rectangular-bottomed bag is formed by sticking the bubble sheet to the rectangular-bottomed body, the bubble sheet being formed in such a manner that both sides of an embossed film in which a large number of projections are formed on the entire surface of a plastic film, are stuck together with a flat plastic film such that the projections of the embossed film include bubbles. In such a cushioning rectangular-bottomed bag, the upper edge of the bubble sheet bag formed from the bubble sheet is stuck to the upper part of the rectangular-bottomed bag. Thus, the easy separation property is imparted to the bag. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a shock-absorbing square bottom bag having lightness, shock-absorbing property, robustness, heat-retaining property, and the like, which is used for courier services requiring buffering properties, transporting books, cold packs, shopping bags, and the like. Regarding the method.

  As conventional square bottom bags that require this type of cushioning, for example, those shown in Patent Document 1 and Patent Document 2 are known. Basically, envelopes such as kraft paper are lined with a bubble sheet. However, the structure has a buffering performance, and is used for transportation of articles requiring attention in handling.

JP 2001-187429 A

JP 2002-037345 A

  However, since the square bottom bag described in Patent Document 1 has the air bubble sheet adhered to the entire inner surface of the square bottom bag, it is very difficult to peel off the air bubble sheet from the square bottom bag after use. In addition to having the problem that it cannot be used for recycling, as the manufacturing process, the bubble sheet is made after first sticking the bubble sheet on the sheet-like square bottom bag. Since it could not be used, there was a problem that the buffer performance was very poor.

  Further, the square bottom bag described in Patent Document 2 is formed by laminating kraft paper and adhering a bubble sheet to the laminated surface, so that the kraft paper is not recyclable and is lined. Since the bottom of the bubble sheet was adhered, it was very difficult to peel off the bubble sheet from the kraft paper (laminated surface), and thus there was a problem of poor recyclability.

  The present invention was devised in view of the current situation, and the object of the present invention is to minimize the heat seal portion of the bubble sheet that tends to be a weak point in the buffer performance, without impairing the buffer performance. Since the square bottom bag body and the bubble sheet bag body can be easily peeled and disassembled with a small force after use, the present invention will provide a buffering square bottom bag that is excellent in recycling performance and easy to manufacture, and a method for producing the same. It is what.

  In order to achieve the above object, in the invention described in claim 1, both sides of an embossed film in which a large number of convex protrusions are formed on the entire surface of the plastic film are bonded together by a flat plastic film, In the shock-absorbing square bottom bag formed by adhering a bubble sheet formed with bubbles inside the protrusions to the square bottom bag body, the upper edge of the bubble sheet bag body formed of the above-mentioned bubble sheet is attached to the square bottom bag body. It is characterized by adhering only to the upper part and having easy peelability.

  The invention according to claim 2 is based on the technical premise of the shock-absorbing square bottom bag according to claim 1, and the bubble sheet bag body is squarely attached to the upper edge portion of the bubble sheet bag body. It is characterized in that a grip allowance is formed as a clue when peeling from the adhesive portion with the bottom bag body.

  Further, in the invention described in claim 3, the shock-absorbing square bottom bag according to claim 1 is a technical premise, and is not bonded to a part of the bonding portion between the bubble sheet bag body and the square bottom bag body. And a finger can be inserted between the bubble sheet bag body and the square bottom bag body of the non-sheet seal portion.

  According to a fourth aspect of the present invention, the shock-absorbing square bottom bag according to the third aspect is a technical premise, and the non-adhesive portion is a folded portion formed on both sides of the square bottom bag body. It is characterized by being formed.

  Next, in the manufacturing method of the shock-absorbing square bottom bag according to claim 5, both sides of the embossed film in which a large number of convex protrusions are formed on the entire surface of the plastic film are bonded to each other by the flat plastic film. After forming a bubble sheet bag body formed of a bubble sheet formed of bubbles in the convex protrusions of the film so that it can be inserted into the square bottom bag body, the bubble sheet bag body is placed in the square bottom bag body. Then, the upper edge portion of the bubble sheet bag body is bonded only to the upper portion of the square bottom bag body.

  Moreover, in invention of Claim 6, on the technical premise, the manufacturing method of the shock absorbing square bottom bag of Claim 5 is carried out, The said adhesion is performed by heat sealing or hot melt, and the heat sealing treatment or The hot-melt treatment is characterized in that one side of the square bottom bag body is alternately performed, or two sides are simultaneously thermocompression bonded and bonded.

  Furthermore, in the invention according to claim 7, based on the technical premise of the manufacturing method of the shock-absorbing square bottom bag according to claim 5 or 6, the upper edge portion of the bubble sheet bag body Is characterized in that a gripping margin is formed as a clue when the bubble sheet bag body is peeled off from the adhesion portion with the square bottom bag body, and the gripping margin is not subjected to an adhesive treatment.

  The invention according to claim 8 is based on the technical premise of the manufacturing method of the shock-absorbing square bottom bag according to any one of claims 5 or 6, and the bubble sheet bag body and the square bottom bag. A non-adhesive part is formed without adhering a part of the main body, and the size of the non-adhesive part between the bubble sheet bag body and the square-bottom bag main body is such that at least one finger can be inserted. It is characterized by being.

  Furthermore, in the invention according to claim 9, the manufacturing method of the shock-absorbing square bottom bag according to claim 8 is a technical premise, and the non-adhesive portions are formed on both sides of the square bottom bag body. It is characterized by having a folded part.

  As described above, in the invention according to claim 1 and claim 5, since the upper edge portion of the bubble sheet bag body is bonded only to the upper part of the square bottom bag body, The heat-sealed portion of the bubble sheet bag that tends to be a weak point can be minimized, and as a result, the square bottom bag body and the bubble sheet bag can be easily peeled and decomposed with little force after use without impairing the cushioning performance. Therefore, it can be provided at a low price because it is very excellent in recycling performance and easy to manufacture.

  Moreover, in invention of Claim 2 and Claim 7, it becomes a clue when peeling this bubble sheet bag body from the adhesion part with a square bottom bag main body to the upper edge part of the said bubble sheet bag body. Since the gripping allowance is formed and the gripping allowance is not applied, when the bubble sheet bag body is peeled from the square bottom bag body, the gripping allowance is gripped and the bubble sheet bag body is pulled. If so, the above disassembly work can be easily performed.

  Furthermore, in invention of Claim 3 and Claim 8, a non-adhesion part is formed in a part of adhesion part of the said bubble sheet bag body and a square bottom bag main body, and the bubble sheet bag body of this non-adhesion part Since the non-contact portion itself does not need to have a special shape, it can be molded very easily. In addition to the effects of the above inventions, The manufacturing cost can be greatly reduced.

  In the inventions according to claim 4 and claim 9, since the non-adhesive portion is formed in the middle folded portion formed on both sides of the square bottom bag body, it is not necessary to crimp the middle folded portion where air bubbles are most easily crushed. As a result, in addition to the effects of the above-described inventions, the cushioning performance of this type of square bottom bag is not impaired, and the folded portion does not need to be heat-sealed, so the number of manufacturing steps is reduced. Manufacturing cost and equipment cost can be greatly reduced.

  In the present invention, the bubble sheet bag body and the square bottom bag main body can be bonded using a double-sided tape or various adhesives. In addition, as described in claim 6, the bonding is heat-sealed. Alternatively, the heat sealing process or the hot melt process may be performed by hot melt, and one side of the square bottom bag body may be alternately performed, or the two sides may be bonded by thermocompression bonding at the same time.

  Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the accompanying drawings.

  FIG. 1 is an exploded perspective view showing a configuration of a buffering square bottom bag K according to Embodiment 1 of the present invention, and FIG. 2 is an enlarged cross-sectional view of the buffering square bottom bag K.

  That is, the shock-absorbing square bottom bag K according to the first embodiment is formed of a square bottom bag body 1 glued in a square bottom bag shape with bleached kraft paper and a bubble sheet that can be inserted into the square bottom bag body 1. The bubble sheet bag body 2 is formed in a shape similar to that of the square bottom bag body 1, and the upper edge portion from the bottom portion of the bubble sheet bag body 2. The height dimension up to 2A is shorter than the height dimension from the inner bottom portion of the square bottom bag body 1 to the upper edge portion 1A. In the figure, reference numeral 1B denotes a mouth tongue portion.

  Bleached kraft paper is a comprehensive representation of relatively strong paper used for medium to large envelopes, and the bubble sheet is the bottom of the cap film cap 3 provided with a number of recesses by vacuum forming. In addition to the sheet having a two-layer structure in which a large number of air-tight air bubbles are formed by laminating the film with a flat back film 4 (see FIG. 2), as shown in FIG. A three-layer structure in which another flat liner film 5 is bonded to the top of each other is used. By having a three-layer structure, there is an advantage that the stored items can be smoothly inserted and removed. Of course, in the present invention, the paper and the bubble sheet to be used are not limited to those described above, and various known envelope papers and bubble sheets can be used depending on the application.

  When manufacturing the buffering square bottom bag K formed in this way, the front and back sides of the square bag main body 1 made of bleached kraft paper formed in an envelope shape are vertically continuous. The cell sheet is folded in two so that the crease is at the bottom, and the upper edge 2A (portion shown by the dotted line in FIG. 1) of the cell bag 2 is a cushioning angle. Heat sealing is performed so as to be fixed to the inner upper portion 1A of the bottom bag K (a portion surrounded by a dotted line in FIG. 1).

  At this time, the entire periphery of the upper edge portion of the bubble sheet bag body 2 may be heat-sealed. However, as shown in FIG. A non-heat seal portion 6 is formed in a part of the heat seal portion of the square bottom bag body 1 so that a finger can be inserted between the bubble sheet bag body 2 and the square bottom bag body 1 of the non-heat seal portion 6. Thus, by inserting a finger into the non-heat seal portion 6 and peeling off the bubble sheet bag body 2 from the square bottom bag body 1, it can be easily disassembled and the recycling operation can be easily performed. The non-heat-sealed portion itself does not need to have a special shape, and only the portion need not be heat-sealed. Therefore, it is possible to form very easily, and in addition to the effects of the above inventions, the manufacturing cost can be reduced. It can be greatly reduced. Of course, instead of the non-heat-sealed portion 6, a protruding piece 7 (portion indicated by a dotted line in FIG. 1) that protrudes from the upper edge portion 2 </ b> A of the bubble sheet bag body 2 is projected to heat the protruding piece 7. By not sealing, the bubble sheet bag body 2 can be peeled off from the square-bottom bag body 1 and decomposed only by gripping and pulling the convex piece 7.

  Further, in the present invention, the non-heat seal portion 6 is set inside the folded portions 8, 8 formed on both sides of the square bottom bag body 1, and the folded portion where the cap 3 is most easily crushed is not crimped. Since the buffering performance of this type of cushioning square bottom bag K is not impaired, and the folded portions 8 and 8 do not need to be subjected to a heat sealing process or the like, the number of manufacturing steps is reduced. The manufacturing cost and equipment cost can be greatly reduced.

  By manufacturing in this way, the heat seal portion of the bubble sheet bag body 2 that tends to be a weak point in buffer performance can be minimized, and as a result, stored items can be stored without impairing the buffer performance. Moreover, since only the upper edge portion of the bubble sheet bag body 2 is bonded and fixed, the square bottom bag body 1 and the bubble sheet bag body 2 can be easily peeled and decomposed with a small force after use. Since it is easy to recycle and easy to manufacture, it can be provided at a low price.

  In the first embodiment, the case where the bubble sheet bag body 2 and the square-bottom bag body 1 are bonded by a known heat treatment called heat sealing has been described as an example. It is not limited, It can also comprise so that it may adhere by using a double-sided tape, various adhesives, or a hot-melt process. Moreover, the said heat seal process or a hot-melt process is the square bottom bag main body 1's. One long side may be alternately performed, or two long sides may be bonded by thermocompression bonding at the same time.

It is a disassembled perspective view which shows the structure of the buffering square bottom bag which concerns on Example 1 of this invention. It is a principal part expanded sectional view which shows the structure of the buffering square bottom bag.

Explanation of symbols

K cushioning square bottom bag 1 square bottom bag body 2 bubble sheet bag body 3 cap (bubble)
4 Back film 5 Liner film 6 Non-heat seal part (non-adhesive part)
7 Convex piece (grip allowance)
8 Folding part

Claims (9)

  The embossed film with many convex protrusions formed on the entire surface of the plastic film is bonded to both sides with a flat plastic film, and a bubble sheet formed by forming bubbles inside the convex protrusions of the embossed film is bonded to the square bottom bag body. In the cushioning square bottom bag formed as described above, a buffering square bottom bag having easy peelability formed by adhering the upper edge of the bubble sheet bag body formed of the bubble sheet only to the upper part of the square bottom bag body.   The buffer according to claim 1, wherein a grip allowance is formed on the upper edge portion of the bubble sheet bag body as a clue when the bubble sheet bag body is peeled off from an adhesive portion with the square bottom bag body. Sexual bottom bag.   A non-adhesive part is formed in a part of an adhesive part between the bubble sheet bag body and the square bottom bag body, and a finger can be inserted between the bubble sheet bag body and the square bottom bag body of the non-adhesive part. The shock-absorbing square bottom bag according to claim 1.   The shock-absorbing square bottom bag according to claim 3, wherein the bonding portion is formed in a folded portion formed on both sides of the square bottom bag body.   A bubble-sealed bag formed of a bubble sheet formed by bonding both sides of an embossed film with a large number of convex protrusions on the entire surface of the plastic film using a flat plastic film to form bubbles inside the convex protrusions of the embossed film. After the body is formed to be insertable into the square bottom bag body, the bubble sheet bag body is inserted into the square bottom bag body, and then the upper edge of the bubble sheet bag body is the upper part of the square bottom bag body. A method for producing a shock-absorbing square-bottom bag, characterized by adhering only.   The adhesion is performed by heat sealing or hot melt, and the heat sealing treatment or hot melt treatment is performed by alternately performing one side of the square-bottom bag body, or two sides are bonded together by thermocompression bonding at the same time. The manufacturing method of the shock absorbing square bottom bag of Claim 5.   On the upper edge portion of the bubble sheet bag body, a grip margin is formed as a clue when the bubble sheet bag body is peeled off from the adhesion portion with the square bottom bag body, and the grip margin is not subjected to an adhesion treatment. The manufacturing method of the buffering square bottom bag in any one of Claim 5 or Claim 6 characterized by the above-mentioned.   A non-adhesive portion is formed without adhering a part of the bubble sheet bag body and the square bottom bag main body, and the size of the non-adhesive portion between the bubble sheet bag body and the square bottom bag main body is at least one finger. The method for producing a shock-absorbing square bottom bag according to any one of claims 5 and 6, characterized in that it is formed so as to have an insertable size.   The method for manufacturing a buffered square bottom bag according to claim 8, wherein the non-adhesive portion is a folded portion formed on both sides of the square bottom bag main body.

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