A Porous Perforated Shrink Film, a Package Using Perforated Shrink Film, a Packaging Device, a Method for Producing Porous Perforated Shrink Film, and a Packaging Method Using Porous Perforated Shrink Film

The present invention relates to a technology of shrink wrap packaging using a shrink film, and a technology of a packaging device. A general shrink film in the prior art has a property of shrinking when heat is applied. The outer shape is a uniform planar film such as a so-called thin film wrap.

The shrink film according to the present invention has a technical feature in the shape itself.

In packaging for an object such as a commodity, a thick paper box such as a corrugated cardboard box is generally used. However, since the shape and the size of the corrugated cardboard box are often standardized, the corrugated cardboard box does not necessarily coincide with the size of the object to be packaged therein, and it has been a problem that the object to be packaged has excessive play space inside the corrugated cardboard box. Therefore, as the cushioning material such as bubble cushioning material having a large number of air bubbles or foamed polystyrene was filled with inside the corrugated cardboard box to package an object to be packaged or surround the object to be packaged.

In the prior art, a blister package is often used for bulk sales products. The blister is a plastic three-dimensional container having a recess substantially matching the outer shape of a product to be packaged, and after the product is filled in the recess, packaging is performed by sealing the opening with a mount or the like. However, in recent years, environmental problems are closed up, and using such plastic packaging is problematic, and packaging with little waste is strongly required.

As described above, the packaging of the corrugated cardboard box and the blister packaging have many problems with a view point of a continuous use, and the importance of the shrink film packaging technology is increased more.

As shrink film packaging in the prior art, the technology disclosed in JP 2011-157116 A publication (Patent Document 1) is known.

is a drawing illustrating shrink film packaging in the prior art disclosed in Japanese Patent Application No. 2011-157116.

As shown in, the shrink filmis provided so as to be extended over the same width as the opening. The end portionsandof the shrink filmare firmly fixed to the lid portionand. After the object to be packaged is placed on the stretched shrink film, the lid portions,,,are folded as they are to close the opening. In this state, although there is a large excessive play space in the state where the object to be packaged is shaken by the shrink filmin the packing boxof the corrugated cardboard box, the package is held by a space between the shrink filmand the four lid portions covering the openingin the packing boxof the corrugated cardboard box. Here, when the shrink filmis shrunk by applying heat to the entire packaging boxof the corrugated cardboard box, the volume of the space between the shrink filmand the four lid portions covering the openingis reduced, As the excessive play of the space between the object to be packaged, the shrink film, and the four lid parts becomes small, the package can be packed in a stable state.

Note that, as shown inB, the shrink filmis fixed to the bottom inner surface by reversing the upside down, and the shrink filmis contracted and packed by applying heat to the entire packing boxof the corrugated cardboard.

Next, the technology disclosed in Japanese Patent Application No. 2004-231230 (Patent Document 2) is known as shrink film packaging in the prior art.

is a drawing illustrating shrink film packaging in the prior art disclosed in JP 2004-231230 A.

As shown in, the shrink film sheetis set at a predetermined position of the mountby manual work or automatic operation. Next, the objectto be packaged (book in this example) is placed on the shrink film sheetby manual work or automatic operation. In this example, the objectto be packaged is set at a position overlapping the mountand not protruding from the mount.

Next, a pair of “folded-back portions” protruding to both sides of the mountare folded back from both sides and stacked on the objectto be packaged. Further, identification label is attached to the object, and then heat is applied to the shrink packaging machine to shrink and pack the shrink film. The volume of the space between the shrink filmand the objectto be packaged is reduced to reduce excessive play space and be packed in a stable state.

Patent art 1: JP 2011-157116 A

Patent art 2: JP 2004-231230 A

In the prior art, there is a problem. In the shrink film packaging technology of, and the shrink film packaging technique of, there is no problem if the object to be packaged is a planar object or rectangular prism as a three-dimensional object to be packaged, a gap between the shrink film and the packaged object is a plane facing each other, that is, if the shrink film is a flat surface, and the facing surface of the packaged object is a flat surface, the flat surfaces are opposed to each other as a gap therebetween. When heat is applied in this state to shrink the shrink film, the surface of the shrink film approaches the surface of the object to be packaged to reduce the volume. That is, the shrink film packaging technology of the prior art can be applied without any problem if it is a planar packaged object or rectangular prism as a three-dimensional object to be packaged that is configured from a plane basis.

However, the outer shape of the object to be packaged is not always be planar one as described above.

For example, if the surface of the object to be packaged has a sharp protrusion or an acute-angled convex shape, the sharp protrusions and acute-angled convex shapes may be pierced into the shrink film to be damaged, and tearing or some may be broken. When the shrink film is torn or broken, if the shrink film is shrunk in the subsequent heat application process, the tearing and the break of the shrink film are made to cut, and then the tear is spread and broken, and the package may be incompletely packed.

In recent years, there are many various designs on an object to be packaged, and there may be a sharp projection or an acute-angled convex shape on the surface of the object to be packaged. In addition, there is a demand for shrink film packaging technology that can apply to the not mass-produced, that is various small lot production, and enables optimal packing. In addition, in recent years, a large number of customers who are conscious about the product of the state of the distribution and delivery, they often require the object to be packed in a stable packing using a few packing materials.

It is an object of the present invention in view of the above problems to provide a special processed shrink film and a packaging device using the shrink film, with which it is possible to stably pack a packaged object having any outer shape using a small packaging material.

To achieve the above-mentioned object, the present invention is provided with the following configuration. Note that the configurations described below can be employed in any combination as much as possible. It should also be understood that aspects of the present invention or technical features are described in the entirety and drawings of the description or based on the idea that could be ascertained by a person skilled in the art from the description, without being limited to what is described below.

A special processed porous perforated shrink film for a packing material according to the present invention is a shrink film in which a large number of holes are perforated in a shrink film.

In general, general the shrink film is uniformly planar, and even if a notch or a cutout is provided in a part of the edge, it is merely a shape forming a part of the outline of the edge or is merely a locking hole provided at the edge even if plural holes are present around the edge.

The porous perforated shrink film according to the present invention is a porous perforated shrink film in which a number of holes are provided in a shrink film.

Here, many holes may include many short-segment or short-thick cut-in holes, holes of many polygonal openings, holes of a large number of circular or elliptical openings, holes of slits on a large number of circular arcs, and the like. In the present invention, the porous perforated shrink film refers to a main range of wrapping the body to be packaged of the shrink film, and holes of such a number of openings and holes of slits are perforated.

That is, the range in which the holes and the slits of the many openings of the porous perforated shrink film of the present invention are provided can be within the center region portion of the shrink film material, that is, the main area for wrapping the body to be packaged. Since a large number of openings and slits are provided in the center area of the shrink film surface instead of one or two holes provided in the cutting and the periphery of the edge, a large number of bridges generated between the hole and the hole in an area in which the object to be packaged is wrapped. Since the holes of many openings and slits are regularly or irregularly provided, a number of bridges are regularly or irregularly generated, and a number of bridges are complicated and continuous. That is, the perforated shrink film can be a nest or mesh-like shape in which a large number of bridges are complicatedly entangled.

According to the above configuration, even if the surface of the object to be packaged has a sharp protrusion or an acute convex shape, the protrusion penetrates into the hole and protrudes upward, whereby the adverse effect of damaging or breaking the shrink film can be mitigated. In addition, even if some of the bridges are broken due to damage or breakage of some of the holes, the continuous other bridges are maintained independently, so that the rupture does not propagate one after another, and the influence of the rupture can be retained within a small area. On the contrary, a conventional uniform, flat shrink film, a break in one place is sequentially propagated to the surroundings one after another. In the porous perforated shrink film according to the present invention, such a situation can be avoided.

In addition, the shrink film material is shrunk by applying heat to the porous perforated shrink film, since the large number of each bridge forming the net-shaped or mesh-like bridge that is complicated and entangled is shrunk as a whole to reduce the covering space, any shape of the object to be packaged can be shrink wrapped while being wrapped along the surface shape thereof.

The providing configuration of the porous perforated shrink film according to the present invention has at least following two patterns.

The one pattern of the porous perforated shrink film is provided by a roll body wound in a roll shape continuously, and the porous perforated shrink film can be delivered from the roll body by a desired length.

The other pattern of the porous perforated shrink film is provided by a single-leaf flat sheet or a double-leaf zigzag folded film, and the porous perforated shrink film can be provided by each leaf.

Here, there are a plurality of patterns as holes of the porous perforated shrink film of the present invention.

For example, a hole is a slit having a short line segment shape or a short thick line segment shape, and a large number of short line segment-shaped or short-drum-shaped cuts are regularly or irregularly bored.

If the holes are a large number of small point like holes, a bridge between the holes is less likely to be generated, but holes are a large number of cuts in a short line segment shape or a short thick line segment shape are provided, a bridge is likely to be generated between the cuts in a short line segment shape or a short thick line segment shape. As described above, the bridges are independent of each other, and the influence of the breakage can be kept within a small range.

Note that, as the size of the short segment or short thick segment, the long sides are thought to be several millimeters to several centimeters, and the number of holes is not limited, but dozens to hundreds or the like may be within the area of wrapping the body to be packaged. They may be examples and may exceed their numerical ranges.

In addition, for example, the hole is a hole having a polygonal opening, and the holes of many polygonal openings are regularly or irregularly perforated to form a mesh shape.

If the hole is in the form of a mesh, the bridge is more clearly generated, and the influence of the breakage can be retained in a small range, and since the bridge itself becomes long, and functions as a so-called long network, the shrinkage margin of the bridge at heat application is also increased, and the packaged objects of various shapes can be more appropriately wrapped and packaged.

The size of the hole may be several millimeters from several centimeters. The number of holes is not limited but may be dozens to hundreds in the area of wrapping the object to be packaged. They may be examples and may exceed their numerical ranges.

In addition, for example, hole can be a slit forming of a circular or elliptical opening or an arc-shaped slit, and a large number of circular or elliptical openings or arcuate cuts are regularly or irregularly perforated.

In this case, although the bridge itself tends to be thick, but the effect close to the mesh shape can also be obtained, and the influence of the breakage can be kept within a small area.

The size of the hole may be several millimeters from several centimeters, and the number of holes is not limited, but may be dozens to hundreds in the area of wrapping the object to be packaged. They may be examples and may exceed their numerical ranges.

Next, the present invention provides a new packaging body as a packaging result and is a new packaged object that has been packaged with the porous perforated shrink film employing the present invention.

For example, the porous perforated shrink film of the present invention is attached to the sheet-like mount, and the shrink label packaging can be performed in a state in which the packaged object is loaded between porous perforated shrink film and the mount.

In addition, for example, a porous perforated shrink film is attached to any of the bottom inner surface, the top surface or the inner peripheral wall surface of the box for transportation, and the shrink wrap package can be packaged in a state in which an object to be packaged is loaded between the porous perforated shrink film and any of the bottom inner surface, the top surface back or the inner peripheral wall surface.

Next, the present invention is also directed to a packaging device that automatically packages an object to be packaged using the porous perforate shrink film of the present invention.

The packaging device according to the present invention has at least following two device configuration patterns.

The first device configuration is a device in which a double-sided tape to be used is previously attached to a mount, and the porous perforated shrink film of the present invention is placed and affixed to the double-sided tape.

This packaging device according to a first device configuration comprises: a mount supply unit that supplies a mount; a double-sided tape attachment unit that attaches a double-sided tape to a predetermined position of the mount supplied from the mount supply unit; a porous perforated shrink film supply unit that supplies the porous perforated shrink film of the present invention; a covering and fixing device that fixes the periphery of the porous shrink film by placing on the double-sided tape. The shrink device shrinks the porous shrink film by heat application to shrink the object to be packaged.

According to the packaging device according to the first device configuration, if the attaching position of the double-sided tape can be affixed by the double-sided tape affixing portion, the arrangement relationship between the porous perforated shrink film, the mount, and the object to be packaged can be appropriately controlled and affixed.

The second device configuration is a device in which an adhesive to be used is previously applied to the mount, and the porous perforated shrink film of the present invention is placed and pasted to the adhesive application place.