JP2018076097A - Packaging film and package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging film which can reduce packaging material cost of a newspaper, a magazine and the like, and to provide a package using the packaging film.SOLUTION: In a packaging film, an object 121 to be packaged is packaged from above and below by an upper polyethylene film 109 delivered from above and a lower polyethylene film 110 delivered from below, peripheral edges of the upper and lower polyethylene films are heat-welded and the object to be packaged is packaged. The packaging film includes a film roll for the upper polyethylene film and a film roll for the lower polyethylene film. The upper polyethylene film is made of a transparent film, and the lower polyethylene film is made of a film thicker than the upper polyethylene film and containing 0.05-1 mass% of a coloring agent.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a packaging film and a package suitable for packaging newspapers, magazines and the like.

  At newspaper publishers and publishing agencies, bundles of newspapers and magazines stacked for each destination are wrapped with polyethylene film from the top and bottom, and the periphery is heat-sealed, and then wrapped from above the packaging film as necessary. They are tied up with a band for shipping. On the top surface of the packaged items made up of stacks of newspapers and magazines, etc., a sheet on which the shipping address information such as the address of the shipping address, name or name, the number of books to be packaged, and a bar code including such information is written Can be read from the outside of the packaging film with a barcode reader, and the worker can visually check the shipping destination.

  Such packaging of an article to be packaged is performed by a packaging machine described in Patent Document 1 below. That is, in the state where the upper polyethylene film fed out from the upper film roll and the lower polyethylene film fed out from the lower film roll are joined by thermal welding, the article to be packaged is inserted toward the vicinity of the joint, Cover the article to be wrapped from above and below with the upper polyethylene film and the lower polyethylene film, heat-seal and melt the upper and lower polyethylene films at the base end side with respect to the insertion direction of the article to be wrapped, and By heat-welding the upper and lower polyethylene films, the article to be packaged is wrapped with the polyethylene film.

Japanese Patent Publication No. 51-41545

  In recent years, various cost savings are desired, and it is also desired to make efforts to reduce costs in some ways for newspaper and magazine packaging films.

  As one means to meet such demands, the inventor has made various studies by thinking of reducing the material cost by reducing the thickness of the polyethylene film. At the time of transportation or when transporting to each shipping destination, etc., the packaged item is slid and moved, so a certain amount of thickness is required so that it will not be torn during handling. It has been found that even if the polyethylene film is relatively thin, there is no practical problem.

  However, when providing a relatively thick polyethylene film roll disposed below and a relatively thin polyethylene film roll disposed above, an operator who performs the packaging operation does not understand the difference in thickness. It has been found that there is a possibility that the polyethylene film roll disposed below is installed above the packaging device, and the polyethylene film roll disposed above is disposed below to perform the packaging operation.

  Accordingly, an object of the present invention is to provide a packaging film that can reduce packaging material costs for newspapers, magazines, etc., and a package using the packaging film.

In order to achieve the above object, the packaging film of the present invention comprises an upper polyethylene film drawn from above and a lower polyethylene film drawn from below, and wraps an article to be wrapped from above and below, and the peripheral edges of the upper and lower polyethylene films. In the packaging film used to wrap the article to be packaged by heat welding,
A film roll of the upper polyethylene film, and a film roll of the lower polyethylene film,
The upper polyethylene film is made of a transparent film,
The lower polyethylene film is thicker than the upper polyethylene film and is made of a film containing 0.05 to 1% by mass of a colorant.

  In the packaging film of the present invention, the thickness of the lower polyethylene film is preferably 15 to 45 μm, and the thickness of the upper polyethylene film is preferably 3 to 20 μm thinner than the lower polyethylene film.

  In the packaging film of the present invention, the article to be packaged is preferably a newspaper or a magazine.

On the other hand, the package of the present invention comprises a packaged object, an upper polyethylene film covering the upper surface of the packaged object, and a lower polyethylene film covering the lower surface of the packaged object,
The periphery of the upper polyethylene film and the lower polyethylene film is thermally welded to wrap the article to be packaged,
The upper polyethylene film is made of a transparent film,
The lower polyethylene film is thicker than the upper polyethylene film and is made of a film containing 0.05 to 1% by mass of a colorant.

  In the package of the present invention, the thickness of the lower polyethylene film is preferably 15 to 45 μm, and the thickness of the upper polyethylene film is preferably 3 to 20 μm thinner than the lower polyethylene film.

  In the package of this invention, it is preferable that the said packaged article is a newspaper or a magazine.

  In the package of this invention, it is preferable that the address sheet | seat in which the shipping address information was described is arrange | positioned inside the said upper polyethylene film and on the upper surface of the said to-be packaged object.

  Moreover, in the package of this invention, the area ratio of the lower polyethylene film which covers the lower surface of the said to-be-packaged object, and the upper polyethylene film which covers the upper surface of the said to-be-packaged object is 1: 1.1-3.5. Preferably there is.

  According to the present invention, the upper polyethylene film is made of a transparent film, and the lower polyethylene film is thicker than the upper polyethylene film and is made of a film containing 0.05 to 1% by mass of a coloring agent. In the state, the roll of the upper polyethylene film appears transparent, while the roll of the lower polyethylene film appears slightly colored. For this reason, when an operator sets to a packaging apparatus, the roll of an upper polyethylene film and the roll of a lower polyethylene film are not mistaken.

  In addition, by making the lower polyethylene film thicker than the upper polyethylene film, even if the packaged item is slid in the packaging operation by the packaging machine or the conveyance operation to distribute to each shipping destination, The polyethylene film can be made difficult to tear, and the total amount of polyethylene used can be reduced.

  Furthermore, by setting the content of the colorant in the lower polyethylene film to 0.05 to 1% by mass, it is difficult to determine that the film is colored in the drawn state, but in the rolled state, it is colored. The amount of colorant used can be minimized as it is clearly seen.

  In this way, the material cost can be reduced by reducing the amount of polyethylene used and minimizing the amount of colorant used.

  Further, since the upper polyethylene film is transparent, it is possible to prevent the shipping destination information from becoming difficult to see when a sheet on which the shipping destination information is described is arranged on the upper surface of the package.

  Furthermore, the lower polyethylene film also has a sufficient amount of colorant used, so that sufficient transparency is ensured and the inside is easily visible.

It is a schematic front view which shows an example of the packaging apparatus applied to the packaging using the packaging film of this invention. It is the schematic side view of the packaging apparatus seen along the II-II line of FIG. It is explanatory drawing which shows the state before throwing a packaged article into the packaging apparatus. It is explanatory drawing which shows the state which injected the to-be-packaged item into the packaging apparatus. In the packaging apparatus, it is explanatory drawing which shows the state which pressed the to-be-packaged object with the 1st conveyor. In the packaging apparatus, it is explanatory drawing which shows the state which moved the to-be-packaged object to the 2nd conveyor. In the packaging apparatus, it is explanatory drawing which shows the state cut | disconnected while fusing up and down polyethylene film in the base end side of a to-be-packaged object. In the packaging apparatus, it is explanatory drawing which shows the state which moved the to-be-packaged item to the 3rd conveyor. In the packaging apparatus, it is explanatory drawing which shows the state which welded the upper and lower polyethylene film in the both sides of a to-be-packaged object. It is a perspective view which shows one Embodiment of the packaging film of this invention. It is a side view which shows one Embodiment of the package body of this invention. It is a perspective view which shows one Embodiment of the package body of this invention.

First, an example of a packaging apparatus to which the packaging film of the present invention is applied will be described.
As shown in FIG. 1, the packaging device 100 includes a pair of upper and lower first conveyors 101, a pair of upper and lower second conveyors 102 disposed adjacent to the first conveyor 101, and an upper and lower pair disposed adjacent to the second conveyor 102. And a pair of third conveyors 103.

  As shown in FIG. 2, the upper conveyors of the first conveyor 101, the second conveyor 102, and the third conveyor 103 are supported by an elevating guide 119 and can be moved up and down by an air cylinder 105. . Further, protrusions 117 and 118 are attached to the lower first conveyor 101, and are synchronously controlled so as to come to a position for pushing the rear part of the article 121 to be packaged.

  Referring again to FIG. 1, an input conveyor 104 is disposed on the opposite side of the first conveyor 101 from the second conveyor 102. An electric motor 106 is installed below the packaging device 100, and the first conveyor 101, the second conveyor 102, the third conveyor 103, and the input conveyor 104 are rotated by the electric motor 106. The first conveyor 101, the second conveyor 102, the third conveyor 103, and the input conveyor 104 can be independently rotated by clutch brakes provided respectively. Moreover, a separate electric motor may be provided for each conveyor so that it can rotate independently.

  An upper film roll 107 is installed above the packaging apparatus 100, and a lower film roll 108 is installed below the packaging apparatus 100. The upper polyethylene film 109 is pulled out from the upper film roll 107, and is pulled out downward between the first conveyor 101 and the second conveyor 102 via the guide roller 111 and the tension roller 112. The lower polyethylene film 110 is pulled out from the lower film roll 108, and is pulled out upward between the first conveyor 101 and the second conveyor 102 via the guide roller 111 and the tension roller 112. The upper polyethylene film 109 and the lower polyethylene film 110 are connected by a cross-welded portion 120 formed by welding and cutting in the previous packaging process.

  A stopper 114 is slidably disposed above the lower end portion of the first conveyor 101. In addition, a pair of upper and lower moving rollers 113 are arranged between the first conveyor 101 and the second conveyor 102, and the moving rollers 113 can move between positions indicated by imaginary lines in the drawing. ing.

  In addition, a pair of cross sealers 115a and 115b arranged up and down are arranged between the first conveyor 101 and the second conveyor 102 so as to be movable up and down. The pair of cross sealers 115a and 115b are welded and blown by sandwiching and heating the upper polyethylene film 109 drawn from the upper film roll 107 and the lower polyethylene film 110 drawn from the lower film roll 108. Is for.

  Further, a pair of side sealers 116a and 116b arranged in the vertical direction are arranged on both sides of the portion where the upper and lower third conveyors 103 are arranged. The pair of side sealers 116 a and 116 b are for welding the upper polyethylene film 109 and the lower polyethylene film 110 on both sides of the package 121.

Next, an example of a packaging method using the packaging apparatus will be described.
As shown in FIG. 3, when an article 121 to be packaged such as a bundle of newspapers and magazines is placed on the input conveyor 104, the input conveyor 104 and the first conveyor 101 are operated by a sensor (not shown). As shown, the article 121 is moved onto the lower first conveyor 101. The movement of the article to be packaged 121 is restricted by the stopper 114, and newspapers and magazines that overlap vertically are aligned in the vertical direction.

  When the article to be packaged 121 is arranged on the lower first conveyor 101 and its movement is restricted by the stopper 114, the state is detected by a sensor (not shown), and the rotation of the first conveyor 101 is temporarily stopped. As shown in FIG. 5, the upper first conveyor 101 descends and compresses the article 121 to be packed with the lower first conveyor 101. At this time, the moving roller 113 moves as indicated by a solid line in the drawing, and temporarily retracts from the path of the article 121 to be packaged.

  Next, as shown in FIG. 6, the first conveyor 101 and the second conveyor 102 are operated to move the article 121 to be packaged onto the second conveyor 102. At this time, the upper polyethylene film 109 and the lower polyethylene film 110 connected by the cross welded portion 120 are pulled out by the article to be packaged 121 and are arranged so as to cover the upper and lower surfaces of the article to be packaged 121. When the article to be packaged 121 moves onto the lower second conveyor 102, the upper second conveyor 102 descends to sandwich the article to be packaged 121 and move it to a predetermined position. When the article 121 is moved to a predetermined position on the second conveyor 102, the operation of the first conveyor 101 and the second conveyor 102 is stopped by a sensor (not shown). Further, the moving roller 113 returns to the position indicated by the solid line, and the upper polyethylene film 109 and the lower polyethylene film 110 are moved in the direction of approaching behind the article 121 to be packaged.

  In this state, as shown in FIG. 7, the cross sealer 115 a that has been waiting upwards is lowered, and the cross sealer 115 b that has been waiting downwards is raised so that the upper portion extended rearward of the package 121. The polyethylene film 109 and the lower polyethylene film 110 are sandwiched and welded by the cross sealers 115a and 115b, and are fused at the portions.

  Thereafter, the second conveyor 102 and the third conveyor 103 are operated, and as shown in FIG. 8, the article 121 to be packaged is moved onto the lower third conveyor 103, and the upper third conveyor 103 is lowered in this state. Then, the article 121 to be packaged is sandwiched. When the article to be packaged 121 is disposed at a predetermined position of the third conveyor 103, the second conveyor 102 and the third conveyor 103 are stopped, and the upper second conveyor 102 is retracted upward as shown in FIG. Further, the side sealer 116a that has been waiting upward is lowered, and the side sealer 116b that has been waiting downward is raised so that the upper polyethylene film 109 and the lower polyethylene film 110 that are extended on both sides of the package 121 are Is sandwiched between the side sealers 116a and 116b on both sides and welded at that portion.

  Thus, as shown in FIGS. 11 and 12, the package 121 is covered from above and below by the upper polyethylene film 109 and the lower polyethylene film 110 and sealed by the cross welded portion 120 and the side welded portion 122. Become.

  The packaging film of the present invention is a film used for packaging an article 121 to be packaged such as a bundle of newspapers and magazines by the above-described packaging method, and the upper polyethylene film 109 shown in FIG. The upper film roll 107 taken and the lower film roll 108 taken up the lower polyethylene film 110 are formed.

  Here, the packaging film according to the present invention is characterized in that the upper polyethylene film 109 is made of a transparent film, the lower polyethylene film 110 is thicker than the upper polyethylene film 109, and contains 0.1 to 0.5% by mass of a coloring agent. It is to consist of.

In this case, the thickness of the lower polyethylene film 110 is preferably 15 to 45 μm, and more preferably 20 to 35 μm. The thickness of the upper polyethylene film 109 is preferably 3 to 20 μm thinner than the lower polyethylene film 110, more preferably 3 to 10 μm thinner than the lower polyethylene film 110, and 4 than the lower polyethylene film 110. Most preferably, it is thinned by ˜8 μm.
If the thickness of the lower polyethylene film 110 is less than 15 μm, the lower polyethylene film 110 may be easily broken in the above-described packaging process or the subsequent moving process, and necessary if the thickness of the lower polyethylene film 110 exceeds 45 μm. It is not economical because it uses film material.

  Further, if the amount of decrease in the thickness of the upper polyethylene film 109 with respect to the thickness of the lower polyethylene film 110 is less than 3 μm, the effect of reducing the material cost tends to be poor, and if it exceeds 20 μm, the upper polyethylene film 109 is torn. May be easier.

  Moreover, although it does not specifically limit as a coloring agent of the lower polyethylene film 110, A well-known coloring pigment is used preferably. The color pigments are not limited in kind, such as inorganic pigments and organic pigments. The color is not particularly limited, but a color with a low material cost and easy to understand even with a small amount is preferably used.

  The content of the colorant in the lower polyethylene film 110 is 0.05 to 1% by mass, preferably 0.2 to 0.5% by mass. When the content of the colorant in the lower polyethylene film 110 is less than 0.05% by mass, it is difficult to distinguish the upper film roll 107 made of the transparent upper polyethylene film 109 even when the lower film roll 108 is used. Moreover, when it exceeds 1 mass%, in order to distinguish the upper film roll 107 and the lower film roll 108, it will contain a coloring agent more than necessary and is not economical.

  By setting the content of the colorant in the lower polyethylene film 110 to 0.1 to 0.5% by mass, in the state of the lower film roll 108, the coloration due to the colorant can be clearly visually recognized due to the overlap of the films. There is no risk of mistaken with the transparent upper film roll 107. Further, in a state where the lower polyethylene film 110 is pulled out from the lower film roll 108, sufficient transparency is maintained, and the packaged article 121 is easily visually recognized from the outside. Accordingly, it is possible to suppress an increase in manufacturing cost by minimizing the amount of colorant used, and to reduce the possibility that the upper film roll 107 and the lower film roll 108 set in the packaging apparatus 100 will be mistaken during the packaging operation. Can do.

  As shown in FIGS. 11 and 12, the packaging body 125 of the present invention has an upper surface of an article 121 made of a bundle of newspapers and magazines covered with an upper polyethylene film 109 and a lower surface covered with a lower polyethylene film 110. A pair of opposite ends of the upper polyethylene film 109 and the lower polyethylene film 110 are connected by the cross welded portion 120, and a pair of ends opposed to each other at a right angle are connected by the side welded portion 122, so that the whole The upper polyethylene film 109 and the lower polyethylene film 110 are covered.

  In this case, the area ratio of the lower polyethylene film 110 covering the lower surface of the article to be packaged 121 and the upper polyethylene film 109 covering the upper surface of the article to be packaged 121 is preferably 1: 1.1 to 3.5, It is more preferable that it is 1: 1.5-3. By setting the area ratio between the lower polyethylene film 110 and the upper polyethylene film 109 in the above range, it is possible to reduce the amount of the polyethylene film used as a whole while maintaining the strength in the packaging operation and the moving operation. And the effect of reducing raw material costs can be enhanced. The area ratio between the lower polyethylene film 110 and the upper polyethylene film 109 is such that the heat seal height of the cross sealers 115a and 115b and the side sealers 116a and 116b for welding the lower polyethylene film 110 and the upper polyethylene film 109, and the lower polyethylene film It can be adjusted by changing the width of the film 110 and the upper polyethylene film 109.

  As shown in FIG. 12, an address sheet 123 with information such as a destination, the number of copies, an issuer, a date, and a bar code including the information is placed on the upper surface of the article 121, It is arranged inside the polyethylene film 109. In this case, since the upper polyethylene film 109 is made of a transparent film, the display content of the address sheet 123 can be read clearly. In addition, it is preferable that the package body 125 is bound by the binding band 124, thereby preventing the article 121 from being scattered inside.

  According to the packaging film and the packaging body according to the present invention as described above, the amount of the polyethylene film resin material used can be reduced, the amount of the coloring agent used can be minimized, and the production cost can be reduced. Moreover, since the film roll of the lower polyethylene film is colored to such an extent that it can be clearly seen, when the operator sets the film roll on the packaging device, the film roll of the upper polyethylene film and the film roll of the lower polyethylene film having different thicknesses. This eliminates the possibility of mistakes.

  In addition, by making the lower polyethylene film thicker than the upper polyethylene film, even if the packaged item is slid in the packaging operation by the packaging device or the conveyance operation to distribute to each shipping destination, The polyethylene film can be made difficult to tear.

  Further, since the upper polyethylene film is transparent, it is possible to prevent the shipping destination information from becoming difficult to see when a sheet on which the shipping destination information is described is arranged on the upper surface of the package. Furthermore, the lower polyethylene film also has a sufficient amount of colorant used, so that sufficient transparency is ensured and the inside is easily visible.

DESCRIPTION OF SYMBOLS 100 Packaging apparatus 101 1st conveyor 102 2nd conveyor 103 3rd conveyor 104 Loading conveyor 105 Air cylinder 106 Electric motor 107 Upper film roll 108 Lower film roll 109 Upper polyethylene film 110 Lower polyethylene film 111 Guide roller 112 Tension roller 113 Moving roller 114 Stopper 115a Cross sealer 115b Cross sealer 116a Side sealer 116b Side sealer 117 Protrusion 118 Protrusion 119 Lifting guide 120 Cross welded part 121 Package 122 Side welded part 123 Address sheet 124 Binding band 125 Package

Claims (8)

The upper polyethylene film drawn from above and the lower polyethylene film drawn from below are used to wrap the article to be packaged from above and below, and to wrap the article to be packaged by thermally welding the peripheral edges of the upper and lower polyethylene films. In packaging film,
A film roll of the upper polyethylene film, and a film roll of the lower polyethylene film,
The upper polyethylene film is made of a transparent film,
The lower polyethylene film is made of a film that is thicker than the upper polyethylene film and contains 0.05 to 1% by mass of a coloring agent. The lower polyethylene film has a thickness of 15 to 45 μm,
The packaging film according to claim 1, wherein the upper polyethylene film is 3 to 20 μm thinner than the lower polyethylene film.   The packaging film according to claim 1, wherein the article to be packaged is a newspaper or a magazine. A package, an upper polyethylene film covering an upper surface of the package, and a lower polyethylene film covering a lower surface of the package;
The periphery of the upper polyethylene film and the lower polyethylene film is thermally welded to wrap the article to be packaged,
The upper polyethylene film is made of a transparent film,
The lower polyethylene film is made of a film that is thicker than the upper polyethylene film and contains 0.05 to 1% by mass of a colorant. The lower polyethylene film has a thickness of 15 to 45 μm,
The package according to claim 4, wherein a thickness of the upper polyethylene film is 3 to 20 µm thinner than the lower polyethylene film.   The package according to claim 4 or 5, wherein the package is a newspaper or a magazine.   The package according to any one of claims 4 to 6, wherein an address sheet on which shipping destination information is described is disposed on the upper surface of the packaged object inside the upper polyethylene film.   The area ratio of the lower polyethylene film covering the lower surface of the packaged object and the upper polyethylene film covering the upper surface of the packaged object is 1: 1.1 to 3.5. Package according to item.

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