JP3171266U - Packaging material - Google Patents

Abstract

The present invention provides a packaging material having more excellent buffering properties and heat retaining properties. In a packaging material 10 formed of a molded body 11 of a sheet-like material 12 on which a placement portion for an object to be packaged M is formed, the sheet-like material 12 has a number of granular bubble portions in the surface direction. It consists of a granular foam sheet and a foamed resin sheet laminated on one side of the granular foam sheet. Further, a belt-like heat welded portion 40 is formed over the entire circumference of the outer peripheral edge of the molded body 11 of the sheet-like material 12. [Selection] Figure 1

Description

  The present invention relates to a packaging material formed of a sheet-like molded body on which a placement portion for an article to be packaged is formed.

  A packaging material that can individually and gently wrap almost the entire outside of the packaged item in order to protect the packaged item such as fruit, ornaments, daily necessities, precision products, or various parts from the impact or damage to the surface. Is used (see, for example, Patent Document 1).

  The packaging material is made of a soft sheet mainly composed of a synthetic resin foam, and has a central seat on which the bottom of the article to be packaged is placed, and the central seat is lifted upward and the central seat is lowered. At the same time, it is composed of a reversing inclined portion extending obliquely from the central seat portion to the lower outer side so as to be reversed inward, and a covering piece formed radially outward from the reversing inclined portion.

  In the above-mentioned conventional packaging material, it is possible to wrap a package by simply placing the package on the central seat, pressing the bottom of the package, and inverting the inverted slope, and in particular, abbreviations such as peach, apple, and melon. Suitable for packaging spherical fruits. Further, since the sheets can be stacked while being stored and transported, it is advantageous in that space can be saved during storage and storage.

  However, in such a packaging material, from the viewpoint of protecting an object to be packaged, a material having better buffering properties and heat insulation (cold insulation) properties is desired.

Japanese Patent No. 2739675

  This invention is made | formed in view of the said point, and provides the packaging material which was more excellent in buffer property and heat retention.

  In other words, the invention of claim 1 is a packaging material comprising a molded body of a sheet-like material on which a placement portion for an article to be packaged is formed, and the sheet-like material has a number of granular bubble portions in the surface direction. It consists of a granular bubble sheet and a foamed resin sheet laminated on one side of the granular bubble sheet, and a band-like heat welded portion is formed over the entire circumference of the outer peripheral edge of the molded body of the sheet-like product A packaging material characterized by

  The invention according to claim 2 relates to the packaging material according to claim 1, wherein the granular foam sheet and the foamed resin sheet constituting the sheet-like material are made of the same kind of synthetic resin material.

  The invention according to claim 3 is characterized in that the placing portion is formed by raising the bottom portion that is lowered when the article to be packaged is packaged, and curved outwardly integrally with the lifting bottom portion, and inward when the raising bottom portion is lowered. It concerns on the packaging material of Claim 1 or 2 which has a curved part which inverts and covers the said to-be packaged object.

  The invention according to claim 4 is a molding die in which the molded body has a main body molded portion having a thickness width of the molded body and a belt-like fusion portion forming a belt-like heat welded portion on the outer periphery of the main body molded portion. It concerns on the packaging material of any one of Claim 1 thru | or 3 obtained by arrange | positioning to vacuum press molding.

  The packaging material according to claim 1 is a packaging material comprising a molded body of a sheet-like material on which a placement portion for an article to be packaged is formed, wherein the sheet-like material has a number of granular bubble portions in the surface direction. And a foamed resin sheet laminated on one surface side of the granular bubble sheet, and a belt-like heat welded portion is formed over the entire outer peripheral edge of the molded body of the sheet-like product. Therefore, it is possible to provide a packaging material that is superior in buffering properties and heat retaining properties as compared with conventional ones.

  The invention of claim 2 is that in claim 1, since the granular foam sheet and the foamed resin sheet constituting the sheet-like material are made of the same kind of synthetic resin material, the granular foam sheet and the foamed resin sheet are improved. While being able to laminate | stack, a manufacturing cost can be reduced.

  The invention of claim 3 is the invention according to claim 1 or 2, wherein a lifting bottom portion that is lowered when the article to be packaged is wrapped, and an outwardly curved shape integrally with the lifting bottom portion, and inward when the lifting bottom portion is lowered. The curved portion for wrapping the article to be wrapped is advantageous in that it can save space during storage and transportation, and there is no need for complicated operations when packaging the article M. It can be packaged easily and reliably.

  The invention of claim 4 is the invention according to claims 1 to 3, wherein the formed body forms a sheet-like product that forms a main body forming portion having a thickness width of the formed body and a belt-like heat welding portion on the outer periphery of the main body forming portion. Since it was obtained by vacuum press molding by placing it in a mold having a landing part, it can be manufactured easily and in large quantities, which is economically advantageous.

It is a perspective view of the packaging material which concerns on one Example of this invention. It is a perspective view at the time of the unwrapping of the packaging material of FIG. It is sectional drawing of the packaging material at the time of non-wrapping. It is principal part sectional drawing of a sheet-like material. It is sectional drawing of a granular bubble sheet. It is sectional drawing of the packaging material at the time of packaging a to-be-packaged object. It is sectional drawing of the shaping | molding die which shape | molds a packaging material. It is a perspective view of the packaging material which concerns on the other Example of this invention.

  1-3, the packaging material 10 which concerns on one Example of this invention consists of the molded object 11 of the sheet-like article 12 in which the mounting part 13 for the to-be-packaged goods M was formed. In the packaging material 10, the sheet-like material 12 is composed of a granular bubble sheet 20 and a foamed resin sheet 30 as shown in FIG. 3. In FIG. 1, the code | symbol M is the to-be packaged object which consists of substantially spherical fruits, such as a peach, an apple, and a melon.

  The granular bubble sheet 20 is formed of a flexible material that can be softly wrapped without damaging the surface of the object to be packaged M such as fruit. As shown in FIGS. Part 25. As the granular bubble sheet 20, a material mainly composed of a known synthetic resin material such as polyethylene, polypropylene, polystyrene, or polyurethane can be suitably used. Moreover, the granular bubble part 25 is for ensuring buffer property and heat insulation (cold insulation) property by an air layer, and is formed in the column or truncated cone shape of about 2-4 mm in height and about 7-10 mm in diameter. .

  As shown in FIG. 5 (a), this granular bubble sheet 20 has a two-layer structure (20A) of a base material sheet 21 and a particle forming sheet 22 for forming granular bubble portions 25, or FIG. 5 (b). As shown in FIG. 2, the substrate sheet 21, the grain forming sheet 22, and the reinforcing sheet 23 are configured in a three-layer structure (20 B). The granular bubble sheet 20A having a two-layer structure is easy to manufacture and economically advantageous. In addition, the granular bubble sheet 20B having a three-layer structure can be used regardless of the front and back of the sheet while improving the strength.

  The foamed resin sheet 30 is formed of a flexible material that can be softly wrapped without damaging the surface of the object to be wrapped M such as fruit, and is laminated on one side of the granular bubble sheet 20 as shown in FIG. Is done. As the foamed resin sheet 30, a material mainly composed of a known synthetic resin material such as polyethylene, polypropylene, polystyrene, or polyurethane can be suitably used. Since this foamed resin sheet 30 has a buffering property and a heat retaining (cold) property, it is possible to obtain a better buffering property and a heat retaining (cold) property by laminating on the granular bubble sheet 20. In addition, when laminating | stacking the foamed resin sheet 30 on the granular foam sheet 20B of a 3 layer structure, as shown in FIG. 4, it can laminate | stack on both the front and back of the granular foam sheet 20B.

  The granular air bubble sheet 20 and the foamed resin sheet 30 constituting the sheet-like material 12 are preferably made of the same type of synthetic resin material. By using the granular foam sheet 20 and the foamed resin sheet 30 as the same kind of synthetic resin material, both sheets can be laminated satisfactorily and the manufacturing cost can be reduced. Further, the sheet-like material 12 may be configured by coloring one or both of the granular bubble sheet 20 and the foamed resin sheet 30. At the time of coloring, a known colorant is appropriately added at the time of manufacturing each of the sheets 20 and 30 so that it can be configured in any desired color and transparent, translucent, or opaque. Thereby, it becomes possible to decorate the packaging material 10 variously and to improve the appearance.

  Further, as shown in FIG. 2, the sheet-like material 12 is formed with a belt-like heat weld portion 40 over the entire circumference of the outer peripheral edge portion of the molded body 11. The band-like heat-welded portion 40 improves the adhesiveness between the granular bubble sheet 20 and the foamed resin sheet 30 by heat-welding the outer peripheral edge portion of the molded body 11 and improves the strength of the outer peripheral edge portion to improve the shape retention. There is an effect to increase. Moreover, since it becomes a cutting part at the time of manufacture in the outer periphery part of the molded object 11, the granular bubble part 25 of the granular bubble sheet 20 may be cut | disconnected, and it may become a cause which the particle | grain formation sheet 22 peels from the base material sheet 21. Therefore, by forming the belt-like heat-welded portion 40, it is possible to prevent the separation by welding the particle forming sheet 22 including the granular bubble portion 25 and the base sheet 21, which are cut at the outer peripheral edge portion.

  Here, as shown in FIGS. 1 to 3 and 6, the molded body 11 is integrally formed with a lifting bottom portion 15 that is a placing portion 13 that is lowered when the article to be packaged M is wrapped, and a lifting bottom portion 15. It has a curved portion 16 which is formed in a curved shape and reverses inward when the lifting bottom portion 15 is lowered so as to wrap the article to be packaged. The lifting bottom portion 15 is formed in an appropriate shape such as a circular shape, an elliptical shape, a polygonal shape such as a triangular shape or a quadrangular shape, according to the shape of the article to be packaged M to be placed. The lifting bottom portion 15 of the embodiment has a substantially circular shape, and is configured to be a flat surface when it is lowered so as to be able to stand on its own. Further, the bending portion 16 is formed in an appropriate shape according to the shape of the lifting bottom portion 15 and the outer shape of the article to be packaged M. The curved portion 15 of the embodiment is formed in the shape of five tongue pieces, and can effectively cover the outer peripheral side portion of the article to be packaged M when reversed.

  Since this molded body 11 is formed in a sheet shape at the normal time (when unwrapped) when the article to be packaged M is not packaged, it can be stacked as it is without being particularly folded during storage or transportation. This is advantageous because it can save space. On the other hand, at the time of packaging the article to be packaged M, it is possible to package easily and reliably without requiring any complicated work at all and simply lowering the lifting bottom 15 and inverting the curved portion 16.

  As shown in FIG. 7, the molded body 11 includes a belt-like bonding portion 53 that forms a sheet-like article 12 into a main body molding portion 55 having a thickness width of the molded body 11 and a belt-like heat welding portion 40 on the outer periphery of the main body molding portion 55. It is obtained by placing in a mold 50 having a vacuum press molding. In the embodiment, the belt-like joining portion 53 is provided on the upper mold 51 of the molding die 50 at a position along the outer shape of the molded body 11. Hereinafter, the manufacturing process of a molded object is demonstrated. 7 denotes a mold surface of the upper mold 51 that defines a predetermined shape of the mold 50, 56 denotes a lower mold of the mold 50, 57 denotes a mold surface of the lower mold 56, and 58 denotes a mold surface 57. And a vacuum suction hole connected to a vacuum pump or the like (not shown).

  First, the granular foam sheet 20 and the foamed resin sheet 30 are heated to about 80 to 120 ° C. and softened, and the foamed resin sheet 30 is disposed on one side (in this example, the back side) of the granular foam sheet 20, It is placed on the mold surface 57 of the mold 56 so as to overlap. Next, the vacuum pump is operated through the vacuum suction hole 58 to bring the sheet-like material 12 (in this example, the foamed resin sheet 30 laminated on the back surface side of the granular bubble sheet 20) into close contact with the mold surface 57, and the sheet-like material. The mold surface 52 of the upper mold 51 is pressed against the object 12.

  Here, in the main body molding portion 55, the granular bubble sheet 20 and the foamed resin sheet 30 are molded into a predetermined shape and adhered to each other by vacuum press molding of the upper mold 51 and the lower mold 56. Further, on the outer periphery of the main body molding portion 55, the band-shaped joining portion 53 protruding from the upper mold 51 presses the granular bubble sheet 20 and the foamed resin sheet 30 to a position where the thickness width is smaller than that of the main body molding portion 55. The belt-like heat welded portion 40 is formed by welding and formed into the molded body 11. After molding, the molded body 11 is taken out from the molding die 50, and trimming is performed by leaving the band-shaped heat-welded portion 40 with a predetermined width (for example, about 1 mm) using a known cutting device, whereby the packaging material 10 is obtained. Thus, if it shape | molds by vacuum press molding, it will become possible to manufacture simply and in large quantities, and it will become economically advantageous.

  In addition, the packaging material of this invention is not limited only to the above-mentioned Example, A part of structure can be changed suitably and implemented in the range which does not deviate from the meaning of an invention. For example, in the embodiment, the molded body has a shape having a raised bottom portion and a curved portion, but a sheet on which a plurality of placement portions 13A each including a substantially hemispherical concave portion 15A are formed as in the packaging material 10A of FIG. It may be a molded body 11A of the article 12A. Also in this packaging material 10A, by configuring the sheet-like material 12A with the granular foam sheet 20 and the foamed resin sheet 30, it is possible to obtain excellent buffering properties and heat insulation (cold insulation) properties. Moreover, even in this packaging material 10A, if the belt-like heat-welded portion 40 is formed over the entire circumference of the outer peripheral edge of the molded body 11A, the strength of the outer peripheral edge can be improved and the shape retaining property can be improved. Peeling of the granular bubble sheet 20 can be prevented.

DESCRIPTION OF SYMBOLS 10 Packaging material 11 Molded body 12 Sheet-like article 13 Placement part 20 Granular cell sheet 25 Granular cell part 30 Foamed resin sheet 40 Band-shaped heat-welded part M Package

Claims (4)

In a packaging material composed of a molded body of a sheet-like material on which a placement portion for an object to be packaged is formed,
The sheet-like material is composed of a granular bubble sheet having a number of granular bubble portions in the surface direction and a foamed resin sheet laminated on one surface side of the granular bubble sheet, and an outer peripheral edge portion of the molded article of the sheet-like material A packaging material in which a belt-like heat-welded portion is formed over the entire circumference.   The packaging material according to claim 1, wherein the granular foam sheet and the foamed resin sheet constituting the sheet-like material are made of the same kind of synthetic resin material.   The mounting portion is formed by a lifting bottom portion that is lowered when the article to be packaged is wrapped and an outwardly curved shape integrally with the lifting bottom portion, and is inverted inward when the lifting bottom portion is lowered and the article to be packaged. The packaging material of Claim 1 or 2 which has a curved part which envelops.   The molded body is placed in a molding die having a main body molded portion having a thickness width of the molded body and a belt-like fusion-bonding portion forming a belt-like heat-welded portion on the outer periphery of the main body molded portion, and is subjected to vacuum press molding. The packaging material according to any one of claims 1 to 3, which is obtained as described above.

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