JP2004168350A - Shrink packaging body and packaging method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent packing habit from being formed on corner portions of an object to be packaged by packing the flexible object such as a plurality of carpets without exerting any stress in the corner portions by a shrink film. <P>SOLUTION: A shrink packaging body is shrink-packaged by heat-shrinking a shrink film in a condition that the entire object to be packaged having corner portions are stacked in a plurality of stages. The shrink film is hardly heat-shrunk at least in the corner portions of the object to be packaged. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention particularly relates to a shrink wrapper obtained by shrink wrapping a soft wrapped object such as a tile carpet, and a method of wrapping the shrink wrapper.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, generally, a package having a soft waist such as a tile carpet is shipped in a state of being stacked in a packing case (cardboard box) in a manufacturing factory.
[0003]
[Problems to be solved by the invention]
Since corrugated cardboard is bulky at the time of disposal, it has problems as a garbage disposal and environmental problems such as recycling and resource saving. As means for saving such packaging materials and solving environmental problems, shrink wrapping in which an object to be wrapped is overlapped with a shrink film is well known.
[0004]
Since the shrink film thermally shrinks, the whole package is tightly packaged under tension. As shown in FIG. 5A, if a soft packaged object 50 in a sheet state, such as a tile carpet, is shrink-wrapped with a shrink film 51, the corners of the packaged object 50 are shrunk by the shrink film. The portion 50a is compressed and tensioned in the thickness direction. The plurality of packages 50 packed in this way are shipped and transported from a manufacturing factory in a state of being shrink-wrapped and distributed, and then the shrink film 51 is opened and displayed at the store.
[0005]
The plurality of packages 50 are shrink-wrapped in a tensioned state for a long period of time from the factory shipment to the display, so that the tensioned state (packing habit) occurs. Since the corners 50a of the packaged article 50 are easily deformed, the corners 50a of the upper and lower packaged articles 50 are particularly curved in the thickness direction and have a habit of being crushed, thereby deteriorating the commercial value. There is a problem of lowering (see FIG. 5B).
[0006]
Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and for example, a soft packaged object such as a plurality of carpets is packed without applying a stress due to a shrink film to a corner thereof, and the packaged object is It is an object to prevent a packing habit from being attached to the corners of the.
[0007]
[Means for Solving the Problems]
The present invention has been made as a shrink wrapper and a wrapping method therefor in order to solve the above-mentioned problems, and the feature of the shrink wrapper is that a plurality of wrapped objects having corner portions are entirely superimposed in a plurality of stages. The shrink film is shrink-wrapped by heat shrinking the shrink film in the folded state, and the shrink film is characterized in that at least a corner portion of the article to be packaged is hardly shrunk by heat. In addition, the case where the corner portion of the packaged article is hardly heat shrunk includes the case where the shrink film is not heat shrunk at all and the case where the heat shrinks to a state where the corner is compressed and not tensioned. It is a concept.
[0008]
Then, the shrink film covers (overlaps) the entire plurality of items to be packaged, thereby protecting the items to be packaged from dust and dirt. Moreover, since the shrink film maintains the tensioned state at the portions other than the corners, it is possible to wrap each packaged object without rattling. In addition, since the shrink film has almost no heat shrinkage at the corners corresponding to the corners of the package, the corners of the package do not receive any tension (stress) due to the shrink film, and the Even if it is packaged over, there is no habit of packing.
[0009]
A feature of the shrink wrapping method is a shrink wrapping method in which the entire wrapped object having a corner portion is superimposed in a plurality of stages and shrink wrapped with a shrink film. The object of the present invention is to make the corners of the package hardly shrink by heating.
[0010]
When the shrink film is heated and shrunk, the corner portions of the article to be packaged hardly shrink by heating, so that the portions of the shrink film that cover the corners of the article to be packaged cover the corners in a loose state. That is, the corners are not given a habit of packing.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of a package according to the present invention. The package 1 includes a package 2 and a shrink film 3 covering the package.
[0012]
The packaged object 2 is, for example, a sheet-shaped (thin-walled) having a rectangular shape such as a tile carpet, and a plurality of sheets are stacked. Specifically, about 20 sheets each having a side of 500 mm are stacked. Examples of the sheet-like material include, besides a tile carpet, a cardboard box folded in a flat state, urethane foam, styrofoam plate, or other soft materials having a stiff waist or easily deformed.
[0013]
The shrink film 3 is a biaxially stretched heat-shrinkable film having a thickness of about 20 to 200 μm, such as polyethylene, polyester, polystyrene, polyvinyl chloride, or polypropylene. As shown in FIGS. 2A and 2B, the shrink film 3 covers the entire packaged object 2, but has a portion that is hardly shrunk to a part (in this embodiment, the shrink film 3 is completely heated). The non-shrinkage portion 3a which is not performed is left. Specifically, the shrink film 3 is heat-shrinked except for the corners 2 a of each package 2. The contracted portions 5a and 5b of the upper surface 1a and the bottom surface 1b of the package 1 are cross-shaped, and the contracted portions 5c of the side surface 1c of the package 1 are band-shaped and continuous with the contracted portions 5a and 5b. .
[0014]
The width W1 of the contracted portions 5a, 5b, 5c is preferably set to be approximately 1/3 of the width W of the packaged object 2, but is not particularly limited. In the shrink film 3, the four corners of the package 1 become non-shrinkable portions 3a, and each packaged object 2 is tensioned from four directions and up and down directions by the shrink film 3, so that it does not shift or rattle. , Are entirely covered with the shrink film 3.
A perforation 7 as a breaking means for breaking the shrink film 3 is formed on at least one of the non-shrinkable portions 3a and on the upper surface of the package 1. The contracted portions 5a, 5b, 5c are indicated by dots.
[0015]
Next, a case where the package 1 is manufactured will be described. First, a predetermined number of articles to be packaged 2 are stacked, and the whole of the articles 2 to be stacked are covered with a shrink film 3 (see FIG. 3). As a means for covering the article to be packaged 2 with the shrink film 3, for example, a well-known pillow wrapping machine, an L-shaped seal wrapping machine, or the like can be used, and the wrapping form is preferably a three-sided seal or a four-sided seal. .
[0016]
Next, the shrink film 3 is heated and shrunk except for the corners 2 a of each packaged object 2. As a means for heating the shrink film 3, a shrink tunnel can be employed. When the shrink tunnel is employed, the non-shrinkable portion 3a of the shrink film 3 is masked in advance, and the packaged object 2 covered with the shrink film 3 is passed through the shrink tunnel in this state. The unmasked portion of the shrink film 3 in the shrink tunnel is heated and contracted by heat, so that a plurality of packages 2 can be wrapped in a tacky state.
[0017]
In addition, masking means that a sheet capable of preventing heating is releasably adhered to a predetermined portion of the shrink film before heating, and when the shrink film is heated, a heating prevention means such as a baffle plate is used for the shrink film. Or along a predetermined part. When an infrared heater is used, heating may be performed by partially covering with a heat ray reflective sheet. The shrink film 3 may be previously subjected to shrinkage prevention printing such as hard ink on the surface of a predetermined portion thereof. The means for heating a predetermined portion of the shrink film 3 may be a method of partially heating with a small hot air blower or the like or a method of rolling a heated roller to the shrink film 3. Means are not particularly limited.
[0018]
Further, since the corner portion 2a of the packaged object 2 in the shrink film 3 does not thermally shrink, the non-shrinkable portion 3a does not tension the corner 2a of the packaged object 2, and the corner 2a (particularly, The stress is not applied to the four corners of the packaged object 2 on the upper side and the lower side (eight corners of the package 1). Therefore, even when it takes a long time from the shipment of the package 1 to the display at the store, when the package is opened, the corners 2a of the carpets to be packaged may be crushed or deformed. I will not.
[0019]
Further, since the perforation 7 for opening is engraved on a portion that does not shrink by heating, even if the shrink film 3 is thermally shrunk, the shrink film 3 is inadvertently triggered by the perforation 7 at that time. There is no risk of breaking.
[0020]
The shrink package of the present invention is not limited to the above embodiment. For example, in the embodiment shown in FIG. The shrink film 3 is heated and shrunk except for the corners 2a. In addition, the heat shrinking part 5 is shown by a dot.
In the embodiment shown in FIG. 2B, the article to be packaged 2 has a trapezoidal shape in plan view, and furthermore, a plurality of (two in this embodiment) shrinks are provided on the upper and lower surfaces and side surfaces of the package 1. A part 5 is provided. The shape of the article to be packaged is not particularly limited, and the shrink film 3 may be heated and shrunk except for at least the corners 2a of the article 2 to be packaged. Further, in each of the above embodiments, the shrink film 3 has the non-shrinkable portion 3a at the corner 2a of the packaged object 2, but such a portion is in a state in which the corner 2a is compressed and not tensioned. The heat shrinkage may be performed in a state where the corner 2a is not crushed or deformed.
[0021]
【The invention's effect】
The present invention provides a shrink film for packaging an object to be packaged, wherein a plurality of objects to be packaged can be firmly fixed by a heat shrunk portion, and at least a corner portion of the object to be packaged is almost heat shrunk. Since the corners of the article to be packaged are not tensioned by the shrink film, no stress is applied to the corners, and it is possible to prevent each corner from becoming habitual when the package is opened. As a result, the merchandise value is not reduced, and a thinner shrink film is used as compared with a cardboard or the like, so that a compact package is obtained, the packaging cost is low, and waste is reduced.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view showing one embodiment of a shrink wrapping body of the present invention.
FIG. 2A is a plan view showing an embodiment of the shrink wrapper of the present invention, and FIG. 2B is a front view including a partly broken portion.
FIG. 3 is a partially cutaway perspective view showing a state before the shrink wrapping body of the present invention is thermally shrunk.
FIGS. 4A and 4B are plan views respectively showing another embodiment of the shrink wrapping body of the present invention.
5A and 5B show a conventional example, in which FIG. 5A is a schematic sectional view of a shrink package, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Package, 2 ... Packaged object, 2a ... Corner, 3 ... Shrink film

Claims (2)

A shrink wrapper formed by shrink wrapping by heating and shrinking the shrink film in a state where the plurality of wrapped objects having corner portions are stacked in a plurality of stages, wherein the shrink film is at least wrapped. A shrink wrap, wherein a corner portion of the object is hardly shrunk by heating. A shrink wrapping method for shrink-wrapping the entire packaged object having a corner portion in a plurality of stages and shrink-wrapping with a shrink film, wherein when shrinking the shrink film by heating, at least a corner portion of the packaged object is shrunk. A shrink packaging method characterized in that almost no heat shrinkage occurs.

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