JPH1072063A - Plastic cellular sheet improved in packaging workability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the packaging workability of a plastic cellular sheet when used as a packaging material. SOLUTION: On a long-sized plastic cellular sheet which is rolled, a perforation 2A is provided in the direction to cross the sheet, with a specified interval to facilitate a cutting. The perforation is provided in the longitudinal direction as well if necessary. The locations of the perforations are marked by applying a printing, or an indication by affixing a small piece of paper is recommended. When an adhesive tape is affixed along at least one edge of the sheet 1, or an adhesive is applied into a band-shape or on the whole surface, the binding or fixation after an article to be packaged has been packaged becomes easier.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic foam sheet which is improved in workability in a packaging operation when used for a packaging material which is a main use thereof.

[0002]

2. Description of the Related Art A plastic bubble sheet formed by laminating a cap film having a large number of protrusions on a plastic film and a flat back film and enclosing air in the protrusions utilizes its buffering ability. Widely used as packaging material.

[0003] There are not a few usages, such as putting an air bubble sheet cut into a specific shape and size into a can or a cardboard box, or wrapping an article to be packaged like wrapping paper. In the latter use mode, the plastic foam sheet delivered from the manufacturer to the consumer is often a roll of a long foam sheet. The consumer cuts out a bubble sheet of an appropriate size from this roll according to the dimensions of the packaged object, and wraps it in a cube, a rectangular parallelepiped, a column, or any other shape according to the shape of the packaged object.

[0004] The use of such a bubble sheet requires an operation of unfolding and cutting a scroll. This cutting is performed by using a cutter knife or the like, but it involves danger and the cutting line is bent, so that it cannot be performed easily. The cut-out bubble sheet must be wrapped around the object to be packaged and then bound separately with a string or fixed with an adhesive tape. The bundling with the cord or the fixing with the adhesive tape is an operation that always accompanies even if the bubble sheet is delivered in a form cut in advance in accordance with the dimensions of the article to be packaged. In addition, bundling and fixing are unexpectedly troublesome, and the resulting package is often undesirable in terms of aesthetics.

[0005]

SUMMARY OF THE INVENTION The basic object of the present invention is to solve the problem of cutting, which is a stage prior to the packaging operation using a plastic foam sheet, and to use it from a roll of the foam sheet for individual packaging operations. It is an object of the present invention to provide a foamed sheet roll from which a packaging material having an appropriate size can be easily taken out.

[0006] A more important object of the present invention is to improve the workability of a packaging operation using the bubble sheet taken out, which makes it easy to take out a packaging material of an appropriate size, and to provide a packaged product. The object of the present invention is to provide a bubble sheet which gives an excellent appearance.

[0007]

The basic aspect of the plastic sheet of the present invention in which the packaging workability is improved is that, as shown in FIG. 1, a cap film having a plastic film provided with a number of projections, a flat film, and a flat film. A plastic foam sheet (1) in which air is sealed in a convex portion by laminating a back film and a long sheet is wound, and a perforation (2A) for cutting across the sheet is used. It is characterized by being provided at a predetermined interval.

If necessary, as shown in FIG. 2, one or two or more perforations (2B) for cutting can be provided in the longitudinal direction of the sheet.

Since the work is convenient if the location of the perforation for cutting is known, printing (3) indicating the position of the perforation is performed as shown in FIG. 2 or a small piece of paper for marking is attached. It is preferable to keep it. Any shape such as a triangle, a trapezoid, or a rectangle can be adopted as the shape of the printed or small piece of paper, and letters, numbers, or symbols may be inserted. In general, one color is sufficient, but two or more colors may be used.

As shown in FIGS. 3 and 4, a preferred embodiment of the plastic foam sheet having improved packaging workability according to the present invention is to extend along at least one edge on the back film (1B) side of the foam sheet (1). Then, an adhesive tape (4) is attached so that the adhesive layer (4B) is exposed. As shown in FIG. 5, on the back film (1B) side of the bubble sheet (1), an adhesive (5) may be applied to at least a band-shaped portion along one edge.

The application of the pressure-sensitive adhesive is not limited to the embodiment shown in FIG. 5, but can be performed on the opposite side of the bubble sheet.
That is, as shown in FIG. 6, a mode in which the adhesive (5) is applied to the top surface of the convex portion in the strip portion along at least one edge on the cap film (1A) side of the bubble sheet (1) is also possible. It is.

In the preferred embodiments described above, whether the adhesive tape is applied or the adhesive is applied, the production of the plastic foam sheet can be carried out in-line, or once the roll of the foam sheet is produced. After that, you can do it again offline.

As the material of the foam sheet, any plastic can be used, but from the viewpoints of workability and cost, conventional polyethylene, polypropylene or EVA (ethylene-vinyl acetate copolymer) is preferred. The base film of the pressure-sensitive adhesive tape may be paper or plastic, but in the case of paper, another adhesive or pressure-sensitive adhesive is required for bonding to the bubble sheet. If plastic is used and an appropriate material is selected in relation to the material of the foam sheet, it can be bonded by fusing simultaneously with the production of the foam sheet.

The pressure-sensitive adhesive is required to be quick-drying and not to transfer to a contacted object, that is, not to cause so-called "trace marks". When the lower limit is the adhesive strength that can be reliably fixed when using the foam sheet as the packaging material, and the upper limit is the adhesive strength that does not make it difficult to peel when opening the package, Use an adhesive with no traces. Suitable such adhesives will be found among common acrylic emulsion, hot melt or rubber based adhesives. Depending on the application, a strong adhesive strength may be desired, and in such a case, a highly adhesive adhesive may be used, and the product may be a product in which a release paper is applied to the surface of the adhesive. .

When the adhesive is applied, it may be applied not only to the belt-shaped area but also to the entire surface, or may be applied in a polka dot intermittent manner.

In any of the above embodiments, the bubble sheet comprises a cap film (1A) and a back film (1).
B) The bubble sheet is not limited to the ordinary two-layer structure consisting only of the above, but is a three-layer foam sheet in which another flat plastic film called a liner film is bonded to the top surface of the convex portion of the cap film. Can also be used, and those embodiments are also included in the present invention.

[0017]

The plastic foam sheet of the present invention with improved packaging workability is perforated at predetermined intervals.
When a consumer who purchases the product in the form of a long roll is used for packaging work, it can be easily cut to a certain size without using a cutter knife or the like. If the position of the perforation is indicated by a mark such as printing, the cutting can be performed more easily. If it is easy to cut, no scraps will be generated due to the breakage, so there is no risk of dust scattering.

In a preferred embodiment, that is, a package using a bubble sheet to which an adhesive tape has been applied or an adhesive has been applied, an object to be packaged in the form of a rectangular parallelepiped has an adhesive tape attached to both edges of a back film. Taking the case of wrapping with a bubble sheet as an example, as shown in FIG. 7, when wrapping an object to be packaged (6) with the back film inside, first, the adhesive tape (4) on the edge of the bubble sheet is used. The edge of the bubble sheet is fixed easily, and after wrapping, the part that goes to the outside of the bubble sheet is fixed to the lower part by the adhesive tape (4) on the other edge of the bubble sheet Is done. Therefore, it is not necessary to bind them again with a string or fix them with another adhesive tape.

When a bubble sheet coated with a pressure-sensitive adhesive is used instead of the pressure-sensitive adhesive tape, packaging can be easily performed in the same manner. It will be easily understood that even when the shape of the article to be packaged changes to, for example, a columnar shape, the workability of the packaging operation is improved by using the bubble sheet of the present invention.

[0020]

【Example】

Example 1 A bubble sheet made of polyethylene, in which the air chamber, that is, the projection of the cap film has a size of 10 mm in diameter × 4 mm in height, and the width of the bubble sheet is 1
20 cm long and 42 m long were produced. Weight is 80
g / m ² .

[0021] This bubble sheet is prepared before winding.
Perforations for cutting were made in the transverse direction at 100 cm intervals.

A rectangular parallelepiped package having dimensions of 30 cm × 40 cm × 30 cm was wrapped with the bubble sheet. For final fixing, an adhesive tape was used. The time required to package 100 pieces was measured to be about 103 minutes. Conventionally, about 100cm using a cutter knife
Since the bubble sheet was cut out and wrapped to the length, the same operation required 131 minutes. It should be noted that the time required for performing the same operation using the bubble sheet cut into 120 cm × 100 cm in advance is about 96 minutes. In this case, scattering of the bubble sheet with the work is not prevented.

Example 2 In producing the perforated bubble sheet of Example 1, an adhesive tape having a width of 50 mm was attached to both edges of the bubble sheet by in-line heat-sealing. The adhesive tape is obtained by applying an acrylic emulsion adhesive on one side of a base film made of EVA having a thickness of 50 μm.

Using this bubble sheet, the same packaging operation as in Example 1 was performed. The time required for packaging 100 pieces was reduced to 72 minutes. This is an effect obtained from a place where another adhesive tape is not required.

Example 3 In the production of the foam sheet of Example 1, prior to winding, perforations were made in the transverse direction at intervals of 60 cm, and an adhesive of an acrylic emulsion was entirely applied to the projections of the cap film. , That is, the entire top surface of the convex portion.

Using this bubble sheet as a packaging material, a diameter of 1
A columnar package of 0 cm × 30 cm in length was packed. The packaging operation consists of wrapping the circumferential surface with the cap film side inward, and binding the remaining foam sheets with wires covered with a vinyl chloride resin at the top and bottom. When the bubble sheet of the present invention is used, the circumferential surface is naturally wrapped by rolling the packaged object placed on the bubble sheet, and the inner surface is also formed by grasping the excess bubble sheet by holding the excess bubble sheet. It became sticky and very easy.

As a result, the time required for packaging the same number of items to be packaged is reduced to almost half as compared with the conventional fixing with an adhesive tape and the packaging in which the upper and lower portions are elastically restored and bound. Was done.

[0028]

In the basic mode, the plastic foam sheet of the present invention can be easily cut to a predetermined size due to the presence of perforations. Since the use of a cutter knife or the like is not required, there is no danger, and the occurrence of loss due to cutting damage and scattering of scraps can be prevented. If a mark indicating the position of the perforation is provided, the portion to be torn can be seen at a glance, and the cutting becomes easier.

According to a preferred embodiment, an adhesive tape is stuck to at least one edge, or an adhesive is applied in a strip shape or on the entire surface. In addition to being able to be fixed as it is, it is also possible to fix the wrapped air bubble sheet without the help of an adhesive tape or the like, which is highly efficient.

Thus, the foam sheet of the present invention is
It improves the operability of the packaging operation, reduces labor and shortens the required time, and eliminates the possibility of impairing the appearance of the package.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a basic mode of a plastic foam sheet of the present invention.

FIG. 2 is a plan view showing a modified embodiment of the plastic foam sheet of FIG.

FIG. 3 is a perspective view corresponding to FIG. 1, showing a preferred embodiment of the plastic foam sheet of the present invention.

FIG. 4 is a cross-sectional view of the plastic foam sheet of FIG.

FIG. 5 is a cross-sectional view corresponding to FIG. 4, showing a modified embodiment of the plastic foam sheet of FIG. 3;

FIG. 6 is a cross-sectional view corresponding to FIGS. 4 and 5, showing still another preferred embodiment of the plastic foam sheet of the present invention.

FIG. 7: Using the plastic foam sheet of FIG.
The top view which shows the place where the to-be-packed thing which has a rectangular parallelepiped shape is packaged.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plastic foam sheet 2A, 2B Perforation for cutting 3 Printing of mark 4 Adhesive tape 4A Base film 4B Adhesive layer 5 Adhesive 6 Packaged material

Claims (6)

[Claims] 1. A plastic bubble sheet in which a cap film having a number of convex portions provided on a plastic film and a flat back film are adhered to each other and air is sealed in the convex portions, and a long sheet is wound. A plastic foam sheet having improved packaging workability, wherein cutting perforations are provided at predetermined intervals across the sheet. 2. One or two bubbles in the longitudinal direction of the bubble sheet.
2. The plastic foam sheet according to claim 1, wherein at least one perforation for cutting is provided. 3. The plastic foam sheet according to claim 1, wherein printing indicating the position of a perforation for cutting is performed, or a small piece of paper for marking is attached. 4. The pressure-sensitive adhesive tape is applied along at least one edge on the back film side of the bubble sheet so that the pressure-sensitive adhesive surface is exposed.
Any of plastic foam sheets. 5. The plastic foam sheet according to claim 1, wherein a pressure-sensitive adhesive is applied to at least one strip along the back film side of the foam sheet. 6. The plastic foam sheet according to any one of claims 1 to 3, wherein an adhesive is applied to a top surface of the convex portion in at least one band-shaped portion on the cap film side of the foam sheet.