JPH062940Y2 - Goods packaging container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an article packaging container, and more particularly to a plastic packaging container used for packaging fruits and the like.

(Prior Art) Conventionally, for packaging fruits such as apples and pears, a cushioning material having an article storage portion for individually storing the articles to be packaged is laid in a case and the articles to be packaged are arranged in the article storage section. The method of packaging is then used.

However, in this method, the deformation rate of the article storage unit depending on the size of the packaged item is small.Therefore, when the packaged item is larger than the packaged item, the packaging material compresses the packaged item during transportation or storage. There was a problem that it became painful. In addition, when the object to be packaged is smaller than the article housing portion, whirling of the object to be packaged in the article housing portion causes rubbing or damage.

(Problems to be Solved by the Invention) The present invention has an object to solve the above problems and provide an article packaging container that can be transported and stored without damaging an object to be packaged.

(Means for Solving the Problem) That is, the invention is a composite resin comprising a base resin sheet layer that defines the outer shape of a packaging container, and at least one or more foamed resin sheet layers laminated on the side of the article to be packaged. In a plastic packaging container provided with a plurality of article accommodating portions for accommodating an article to be packaged in a sheet material, a raised portion is formed at the center of the bottom portion of the base resin sheet layer in each of the article accommodating portions, and the foam is formed. The resin sheet layer is joined to the base resin sheet layer at the upper part of the side part of the article housing part, the upper part of the center part of the bottom part, and the outer peripheral part of the bottom part. The present invention relates to an article packaging container, wherein a void is formed.

(Example) The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a plan view showing an example of an article packaging container of the present invention,
FIG. 2 is an enlarged cross-sectional view of the main part, and FIG. 3 is 3-3 of FIG.
4 is an enlarged sectional view of the composite sheet material used in the present invention, and FIG. 5 is a sectional view showing an example of its manufacturing method.

As shown in FIG. 1, an article packaging container 10 according to this embodiment includes a plurality of article accommodation units 1 for accommodating articles to be packaged.
1, 11, 11, ... Are provided, and the topmost portion 13 of the side wall 12 forms an acute-angled ridge line 14.

As understood from FIGS. 2 and 3, the article packaging container 10 includes a base resin sheet 21 and a foamed resin sheet 2
It is formed by a composite sheet 20 composed of 2 and.

In the article storage section 11, a raised portion 15 is formed in the center Q of the bottom section, and the foamed resin sheet layer 22 and the base resin sheet layer 21 are the side upper section P and the bottom section of the article storage section 11. The central portion Q is joined at the bottom outer peripheral portion R to form a void S in the lower side portion of the article storage portion 11 and a void T in the outer peripheral portion of the bottom central raised portion. The upper part 15
The size of the voids S and T varies depending on the size and weight of the packaged object, but is preferably about 2 mm. These voids S and T can enhance the air permeability and heat retention of the packaging container when the article to be packaged is placed, and also the shock absorbing property between the article to be packaged and the base resin sheet layer. Further, since the deformation rate of the article storage unit 11 is increased, the article accommodation section 11 can be deformed in conformity with the shape of the packaged object, and the packaged object 11 can be reliably wrapped without causing a bead rotation. The article to be packaged is supported by the upper side portion P and the center portion Q of the bottom of the article storage unit 11 and does not cause unnecessary pressure on the article to be packaged by the packaging container to damage the article to be packaged.

FIG. 4 shows an example of the composite sheet material 20 for forming the article packaging container 10 of FIG. As shown in the figure, in the composite sheet material 20, an adhesive agent 23 is interposed between a base resin sheet layer 21 that defines the outer shape of the packaging container and a foamed resin sheet layer 22 provided on the side of the object to be packaged. Are integrally laminated by.

In the above structure, non-foamed resin such as polyethylene, polypropylene, polystyrene, vinyl chloride, or foamed resin such as foamed polystyrene paper, crosslinked expanded polystyrene, crosslinked expanded polyethylene, expanded polyethylene is used for the base resin sheet layer 21. The latter foamed resin is preferably used in terms of buffering properties. The thickness of the base resin sheet layer 21 is preferably about 0.5 to 5 mm, though it varies depending on the weight and shape of the packaged object.

As the base material of the foamed resin sheet layer 22, a polyurethane foam having an open cell structure is usually used. The foamed resin sheet layer 22 has a thickness of about 0.5 to 5 mm, but it is also possible to laminate another known foamed resin on the polyurethane foam in order to further enhance the cushioning property.

As the adhesive 23, a resin film having a relatively low melting point such as ethylene / vinyl acetate copolymer or low density polyethylene is used.

A known method is used as the method of forming the article packaging container 10, but the vacuum forming method is economical and efficient.

FIG. 5 shows an example of the manufacturing method. That is, the composite sheet material 20 is placed so that the base resin sheet layer 21 is on the female mold 32 side of the vacuum forming machine 30 and vacuum formed. The female die 32 is provided with a concave die 33 for an article storage portion for accommodating an article to be packaged, a convex die 34 for forming the ridge line 14, and a convex die 36 for forming the raised portion 15. Then, the foamed resin sheet material 22 of the composite sheet material 20.
From the side, the female mold 32 and a cylindrical male mold 3 maintaining a predetermined thickness
By pressing 1, the upper side part P, the central part Q of the bottom part, and the outer peripheral part R of the bottom part of the foamed resin sheet layer 22 are bonded to the base resin sheet layer 21, and a space S and a bottom part are formed in the lower side part of the article housing part 11. A void T is formed on the outer periphery of the central bank upper portion. And given a predetermined shape to the foamed resin sheet layer,
Therefore, the entire composite sheet material 20 is formed into a desired article packaging container shape. Reference numeral 35 is a vacuum suction hole portion.

(Operation / Effect) As shown and described above, according to the article packaging container of the present invention, the base resin sheet layer and the foamed resin sheet layer are provided on the lower side portion of the article housing portion, the central portion of the bottom portion, and the outer periphery of the raised portion. Since the enclosed space is provided, compared to the conventional article packaging container, the article accommodation section flexibly deforms according to the size of the article to be packaged and conforms to the shape of the package, so that the article to be packaged is surely secured. I was able to prevent rubbing and pressure on the packaging and container. Moreover, the air permeability and heat retention of the packaging container could be improved.

Further, since the composite sheet material composed of the base resin sheet layer and the foamed resin sheet layer laminated on the side of the packaged resin sheet layer is used, the contact between the case and the packaged object is softened. It can also be done, and the effect of this invention is great.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of an article packaging container of the present invention,
FIG. 2 is an enlarged cross-sectional view of the main part, and FIG. 3 is 3-3 of FIG.
4 is an enlarged sectional view of the composite sheet material used in the present invention, and FIG. 5 is a sectional view showing an example of its manufacturing method. DESCRIPTION OF SYMBOLS 10 ... Article packaging container, 11 ... Article accommodating part, 12 ... Ascending top, P ... Side upper part, Q ... Bottom central part, R ... Bottom outer peripheral part
20 ... Composite resin sheet layer, 21 ... Base resin sheet layer, 2
2 ... Foamed resin sheet layer, S, T ... voids.

Claims (1)

[Scope of utility model registration request] 1. An article to be packaged is housed in a composite resin sheet material comprising a base resin sheet layer that defines the outer shape of a packaging container and at least one foamed resin sheet layer laminated on the side of the article to be packaged. In a plastic packaging container provided with a plurality of article storage portions for, a raised portion is formed in the center of the bottom of the base resin sheet layer in each of the article storage portions, and the foamed resin sheet layer is on the article storage portion side. Characterized in that the base resin sheet layer is joined to the upper part of the base, the upper part of the center of the bottom part, and the outer peripheral part of the bottom part, and that a void is formed in the lower part of the side part of the article housing part and the outer peripheral part of the central part of the bottom center part. Article packaging containers.