JPH11278536A - Product package for recording medium or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve stability in side adhesive parts and easiness in unsealing by providing a non-adhesive strip for unsealing on a part of an adhesive strip of a package. SOLUTION: The package includes an overlapping end adhesive part 17 of an upper trapezoidal fold 13 forming a weak adhesive strip 18 at a tip end and has a non-adhesive strip 19 for starting unsealing at least on a part between the weak adhesive strip 18 and a body adhesive part. A side adhesive part 15 of the upper trapezoidal fold 13 extends in a direction perpendicular to the overlapping end adhesive part 17 wherein its most intermediate part is formed as a weak adhesive strip 20 and both ends are formed as strong adhesive strips 21. On the other hand, a lower trapezoidal fold 14 has no overlapping end adhesive part but is formed only of a side adhesive part 16. Thus since the side adhesive parts 15, 16 have sufficient adhesive force as the strong adhesive parts 21, 22, they may not be peeled off during storage, transportation, display or the like, thereby allowing side film folds to be stably kept. In addition, at the time of unsealing, the weak adhesive strip can be easily peeled off from a portion of the non-adhesive strip 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package in which a recording medium such as a magnetic recording medium or an optical recording medium is packaged with a plastic film, and more particularly to a plastic film package which can be easily opened.

[0002]

2. Description of the Related Art Conventionally, when transporting or storing a product, packaging is performed using appropriate materials and containers in order to preserve or protect its value and condition. In particular, the performance of a recording medium or the like is greatly impaired if dust enters the inside and adheres to a tape or a disk. Therefore, it is customary to package a single film or a plurality of films. In general, a plastic film is thin and strong, and has good transparency, so that it is convenient because the inside product can be seen through.

For example, taking an audio cassette as an example,
A product in a plastic case is generally caramel-packaged with a heat-shrinkable plastic film (such as stretched PE or PP) provided with a design, and then the plastic film is shrunk in a heat-shrink furnace to tightly package the product. As shown in FIG. 1, an example of the caramel packaging is such that a superposed edge of a plastic film 1 wrapping a body of a rectangular parallelepiped product is formed with a body bonding portion 2 by heat sealing and extends from both end surfaces of the product. Plastic film edge
The product is folded first from the opposing short side to the product end face among the four sides on both end faces of the product, and then folded from the opposing long side toward the product end face, and the side adhesive portion 3 is formed by heat sealing.

[0004] When using the product, the purchaser must naturally remove the plastic film surrounding the product and take out the product inside. As shown in FIG. 1, as a means for opening caramel packaging, generally, as shown in FIG. 1, a method of arranging an opening tape 4 such as a tear tape on the inner surface of a plastic film 1 of a product body, or a method of easily peeling off a body adhesive portion. For example, as shown in FIG. 2, the body adhesive portion is provided with a weak adhesive band 5 and a non-adhesive band 6, and a cut 7 is formed in the vicinity of the non-adhesive band 6 as opening assisting means. The main method was to open the body from the waistline. Note that the end surface bonding portion forms a strong bonding band 8.

[0005]

A heat-shrinkable plastic film having a thickness of about 20 to 30 μm is usually used for packaging a recording medium such as an audio cassette.
This type of film generally has no directivity in the tear direction,
In addition, because of the heat shrinkage, it is in close contact with the product, and it is difficult to control the tear direction. Usually, the unsealing part is often located on the waist part formed along the longitudinal direction of the product, and even if a non-adhesive band or a weak adhesive band is provided on the waist part, adhesion may occur due to variations in adhesion. In some cases, for example, when the film became partially strong, the film was torn in the middle and the opening was not successful. In addition, even when a tear tape was used, the tear tape was often detached and the openability was often impaired.

When the body seal portion and the opening portion are provided substantially parallel to the longitudinal direction of the product, the adhesive strength tends to fluctuate due to the bending of the product when heat sealing is performed in the longitudinal direction of the product. If peeled, the value as a product is lost, so it was necessary to strengthen the heat seal to prevent peeling. Further, it is even more preferable that there is a hole of a reel hub in the body upholstery portion like a VHS video tape or the like, or that a finger hook for opening a case is cut off like an audio cassette. For this reason, a large variation occurs in the opening force, the adhesion is too strong, and the opening safety is further reduced.

[0007] Therefore, it is required that the adhesion of the body adhesive portion should be such that the above-mentioned problem does not occur as ordinary adhesion, and that the openability can be easily made. It is practical to use an adhesive band that does not have an opening or non-adhesive part, and a side adhesive part that is a weak adhesive band near the trunk and an edge that is far from the trunk as a non-adhesive part. New model registration 300
No. 3279. However, the side adhesive part is a part where external force is likely to act, and if there is a non-adhesive part at the edge, the seal will peel off from that part during transportation, storage, display, etc. until opening, which will reduce the commercial value. There is a damaging problem. Therefore, an object of the present invention is to solve such a problem.

[0008]

That is, the present invention provides:
One or more products having a substantially rectangular parallelepiped shape are wrapped with a heat-shrinkable plastic film, and the overlapping edges of the plastic film are heat-sealed to form a body bonding portion, which extends beyond the product end surface of the plastic film. The folded portion is folded into the end face from two opposing sides to form a lower folded part, and the remaining two opposed sides are folded into the end face to form a trapezoidal folded part. In a package formed by heat-sealing a front edge portion to form a side bonding portion, an overlapping edge portion extending from the body bonding portion to one of the trapezoidal folded portions has a weak bonding band or a strong bonding band at the front edge portion. And a non-adhesive band for opening is provided in at least a part between the weak adhesive band or the strong adhesive band and the body adhesive portion. According to this, the adhesiveness of the side adhesive portion is improved, and the opening becomes easy.

According to a preferred aspect of the present invention, the leading edge of the overlapping edge has a weak adhesive band, and the side adhesive portions are formed on the weak adhesive band extending to both sides from the weak adhesive band and at both ends thereof. And a strong adhesive band. According to this form,
The adhesion of the side bond is further improved. According to another preferred embodiment of the present invention, a weak adhesive band is formed at least at a portion connected to the side adhesive portion of the body adhesive portion.
According to this, the peeling of the trunk bonding portion at the time of opening is facilitated.

[0010]

Next, preferred embodiments of the present invention will be described in detail with reference to the drawings. First, the outline of the caramel packaging method will be described. The following examples are all described as having a caramel packaging form.

FIG. 3 is a process diagram showing an example of the process, in which a heat-shrinkable plastic film 54 is unwound from a roll 52, passes through a guide roller 56, and passes through a small edge cutter roll 6.
The sheet is cut into carrier film sheets by cutting along a cutting line 94 at 4, and is wound around the body of 50 of a rectangular parallelepiped plastic case containing a tape cassette by winding means such as rollers 96 and 98, The wrap 70 having the body adhesive portion 100 is heat-sealed by the body heater 97 which moves up and down at the superimposed edge of the film, and the film portions protruding to both ends are folded from the side of the product toward the end face of the product, and then remaining. Is folded into a trapezoid on the end face of the product, and the side heaters 102a,
02b forms a heat-sealed side bonded portion 104. Next, the package is subjected to heat shrinkage in the heat shrink furnace 106 to complete the package 108 in which the film is adhered to the periphery of the product.
The package is then packed in a box 118 and an adhesive tape 120
Will be shipped closed. Note that, depending on the size of the product, the upper and lower trapezoidal folds of the side adhesive portion may or may not overlap.

Generally, the side adhesive portion 104 is a narrow and flat surface, and the pressure is uniformly applied during heat sealing, so that the adhesive force can be easily controlled to be constant. It is easy to bend and it is difficult to always achieve uniform adhesion. Therefore, in the present invention, it is not the body adhesive part,
By devising the opening part in the side bonding part, stable adhesion and easy opening property are obtained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following examples, strong adhesion refers to adhesion that can be peeled off only by a strong force when heat-fusible plastic films or an overlapped portion of other plastics are directly adhered by heat sealing. Adhesion means that a printing ink (as is the case with ordinary color printing inks) that imparts non-adhesion to the surface of a heat-sealable plastic film is applied in a predetermined area ratio to the area of the plastic film. A non-adhesive print refers to a print that has been printed with a pattern to reduce the adhesive strength of the overlapping portion as appropriate. To tell.

Embodiment 1 This example illustrates a case where the upper and lower trapezoidal folds do not overlap each other. As shown in FIG. 4, the package 10 is a product (not shown) such as a case accommodating a tape cassette, which is wrapped with a heat-shrinkable plastic film 11 such as heat-shrinkable PE or PP. Adhesion part is weak adhesive band 12
The side bonding portions 15 and 16 described below are formed on the edge portions of the upper trapezoidal fold portion 13 and the lower trapezoidal fold portion 14 folded on the end surface of the product, respectively. Further, an overlapping edge bonding portion 17 described below is also formed on an overlapping edge extending from the body bonding portion.

First, the overlapping edge bonding portion 17 of the upper trapezoidal folded portion 13 forms a weak bonding band 18 at the front end edge, and at least a portion between the weak bonding band 18 and the body bonding portion for opening opening is formed. It has a non-adhesive band 19. As shown in the figure, a weak adhesive band can be formed above the non-adhesive band 19. The side adhesive portion 15 of the upper trapezoidal folded portion 13 extends in a direction orthogonal to the overlapping edge adhesive portion 17, most of the intermediate portion is formed as a weak adhesive band 20, and both ends are formed as strong adhesive bands 21. The strong adhesive band 21 is necessary for stably holding the side adhesive portion 15.

On the other hand, the lower trapezoidal folded portion 14 has no overlapping edge bonding portion, but only the side bonding portion 16. This side bonding portion 16 is configured as a strong bonding band 22. With the above configuration, the side adhesive portions 15 and 16 have strong adhesive portions 21 and 22 and have a sufficient adhesive strength, so that they are not peeled off during storage, transportation, display, etc., and the folded portions of the side films can be stably formed. Can be held. on the other hand,
When the package is opened, the weak adhesive band can be easily peeled from the non-adhesive band 19.

Embodiment 2 Referring to FIG. This example shows another example in which the upper and lower trapezoidal folds do not overlap each other. In this example, the body bonding portion is formed as a weak bonding band (not shown), and a side bonding portion described below is provided at an edge portion of the upper trapezoidal fold portion 23 and the lower trapezoidal fold portion 24 folded on the end surface of the product. Form each. Also, an overlapping edge bonding portion described below is formed on an overlapping edge portion extending from the body bonding portion. First, the overlapping edge bonding portion of the lower trapezoidal fold portion 24 forms a strong bonding band at the leading edge, and a non-bonding band 28 for starting opening is formed at least in part between the strong bonding band 26 and the body bonding portion. Having. A weak adhesive band 27 is formed below the non-adhesive band 28. Opening indication 2 to indicate the opening direction of non-adhesive band 28
9 may be printed. The side bonding portion 26 of the lower trapezoidal folded portion 24 extends in a direction orthogonal to the overlapping edge bonding portion, and forms a strong bonding band integral with the strong bonding portion at the tip of the overlapping edge bonding portion.

On the other hand, the upper trapezoidal folded portion 23 has no overlapping edge bonding portion, only the side bonding portion 25, and the side bonding portion 25 is configured as a strong bonding band. With the above configuration, the side adhesive portions 25 and 26 are strong adhesive portions and have a sufficient adhesive strength, so that they do not peel off during storage, transportation, display, etc., and stably hold the folded portion of the side film. can do. On the other hand, when opening the package, the weak adhesive band 27 can be easily peeled from the non-adhesive band 28.

Embodiment 3 Referring to FIGS. This example illustrates a case where the upper and lower trapezoidal folds overlap each other. In the package 10 of this example, the body bonding portion is formed as a weak bonding band 30, the upper trapezoidal folding portion 31 is firstly folded on the end face of the product, and then the lower trapezoidal folding portion 32 is folded and heat-sealed. The overlapping edge adhesive portion 33 of the upper trapezoidal folded portion 31 forms a weak or strong adhesive band 34 at the distal end edge, and at least a part between the weak or strong adhesive band 34 and the weak adhesive band 30 for opening the opening. It has a non-adhesive band 35. Note that a weak adhesive band can be formed above the non-adhesive band 35 as shown. The side adhesive portion of the upper trapezoidal fold portion 31 is formed between the upper trapezoidal fold portion and the lower trapezoidal fold portion. On the other hand, the lower trapezoidal folded portion 32 has no overlapping edge bonding portion, and has only the side bonding portion 36. The side bonding portion 36 is configured as a weak bonding band 37 at most of the central portion and as a strong bonding band 38 at both ends.
These adhesive bands 37 and 38 are formed by heat sealing in a state where the lower trapezoidal fold 32 is folded over the upper trapezoidal fold 31.

With the above configuration, the side bonding portion 36
Has a sufficient adhesive strength by the weak adhesive portion 37 and the strong adhesive bands 38, 38, so that the folded portion of the side film can be stably held without being peeled off during storage, transportation, display and the like. On the other hand, when opening the package, the weak adhesive band can be easily peeled off from the non-adhesive band 35.
Although the weak adhesive band 37 improves the easy peeling property, the strong adhesive bands 38, 38 are present at both ends, so that sufficient adhesive strength can be maintained until opening is necessary. Upon opening, as shown in FIG. 7, first, the side adhesive portion 36 is peeled off, and then the non-adhesive band 3 is removed.
When the overlapping edge bonding portion is peeled off from the point 5, the peeling can be easily performed up to the weak bonding band 30 as shown in FIG.

Embodiment 4 Referring to FIG. This example is a modification of the example of FIGS. 6 to 8 and shows a state where FIG. 6 is turned upside down. In this example, an opening indication 40 for instructing an opening position is further printed on the non-adhesive band 35, and a cut 39 for facilitating opening.
Are put in the weak adhesive band 37 of the side adhesive portion 36.

[0022]

As described above, according to the present invention, both the stability of the side adhesive portion and the ease of opening can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional package provided with a tear tape opening means.

FIG. 2 is a perspective view of a conventional packaging body provided with an opening means in which a body adhesive portion has a weak adhesive band.

FIG. 3 is a diagram showing an outline of a caramel packaging process.

FIG. 4 is a perspective view showing a package having opening means according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing a package having opening means according to Embodiment 2 of the present invention.

FIG. 6 is a perspective view showing a package having opening means according to a third embodiment of the present invention.

FIG. 7 is a perspective view showing a step of opening a package by an opening means according to a third embodiment of the present invention.

FIG. 8 is a perspective view showing the next stage of the step of opening the package by the opening means according to the third embodiment of the present invention.

FIG. 9 is a perspective view showing a package having an opening means according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Package body 11 Heat-shrinkable plastic film 12,30 Low adhesive band 13,23,31 Upper trapezoidal fold part 14,24,32 Lower trapezoidal fold part 15,16,25,26,36 Side adhesive part 17,33 Overlap Edge bonding portion 18, 20, 27 Weak bonding band 19, 28, 35 Non-bonding band 21, 22, 38 Strong bonding band 29, 40 Opening indication 34 Weak or strong bonding band 37 Weak bonding band 39 Cut

Claims (3)

[Claims] 1. A plastic film product comprising: wrapping at least one product having a substantially rectangular parallelepiped shape with a heat-shrinkable plastic film; heat-sealing overlapping edges of the plastic film to form a body bonding portion; A portion extending beyond the end face is folded into the end face from two opposing sides to form a lower fold, and a trapezoidal fold is formed thereon by folding the remaining two opposing sides into the end face. In a package formed by heat sealing the leading edge of the trapezoidal fold to form a side bonding portion, an overlapping edge extending from the body bonding portion to one of the trapezoidal folds is weak at the leading edge. Has an adhesive band or a strong adhesive band,
A film package having a non-adhesive band for opening in at least a portion between the weak adhesive band or the strong adhesive band and the body adhesive portion. 2. The method according to claim 2, wherein a tip edge of the overlapping edge is a weak adhesive band, and the side adhesive portion comprises a weak adhesive band extending to both sides from the weak adhesive band and strong adhesive bands formed at both ends thereof. The film package according to claim 1, wherein: 3. The film package according to claim 1, wherein a weak adhesive band is formed at least in a portion connected to the side adhesive portion of the body adhesive portion.