JPH0242611Y2 - - Google Patents

Description

[Detailed description of the invention] In this invention, the inside is made of low foaming synthetic resin and the outside is made of high foaming synthetic resin, and at least the ridgeline portion located in the stacking load direction is made of low foaming over the entire length of the ridgeline. The present invention relates to a packaging cushioning device whose reinforcing portion is formed of synthetic resin.

BACKGROUND ART Conventionally, foamed synthetic resins such as expanded polystyrene resins have been frequently used as cushioning and fixing materials for packaging, for example, in consideration of their cushioning properties.

However, after packaging various products, cushioning and fixing materials made of styrofoam resin, etc. are easily damaged when subjected to pressure such as load, impact, or dropping during transportation or storage, especially when directly exposed to This is not only noticeable in ridgeline areas including corners that are subject to external pressure, but due to the lack of rigidity, this often occurs when various products are heavy or when stacked in multiple stages.

The purpose of this project is to eliminate the drawbacks of conventional packaging cushioning and fixing materials made of foamed synthetic resin. In a packaging shock absorber having a two-layer structure made of resin layers; at least the ridgeline portion located in the stacking load direction is formed of a low-foaming synthetic resin layer over the entire length of the ridgeline. It is in the packaging cushioning material.

Hereinafter, details of the present invention will be disclosed with reference to the accompanying drawings.

FIG. 1 shows a conventional packaging form. In the figure, 1 is a product such as electrical equipment, and the product 1 is covered with cushioning materials such as foamed polyolefin synthetic resin such as foamed polystyrene, foamed polyethylene, and foamed polypropylene from both sides. It is placed inside the hollow part 2a at the center of the buffer fixing material 2 so as to be held between the fixing materials 2, and after installation, it is stored in a cardboard box 3 and packed.

In contrast, in this case, instead of the conventional cushioning fixing material 2 made of the single foam, the inner side is made of low-foaming synthetic resin and the outer side is made of foamed synthetic resin. For the ridgeline portion located in the load direction, a packaging shock absorber is used in which a reinforcing portion is formed with a low-foaming synthetic resin over the entire length of the ridgeline.

The buffer fixing material 2 is preferably one manufactured by filling synthetic resin beads with different expansion ratios into a mold for resin molding, heating and cooling them, and is particularly suitable for use with expanded polystyrene resin beads.

In FIG. 2, the packaging cushioning device 4 according to the present invention is
Its outer peripheral surface is formed of a highly foamed layer 4a, and its inner surface is formed of a low foamed layer 4b. The expansion ratio of the high foaming layer is preferably 40 to 60 times, and the foaming ratio of the low foaming layer is 10 to 30 times, and the difference in each ratio is preferably 10 times or more.

Note that the magnification is expressed by the following formula.

Magnification = Volume of molded product / Weight of molded product Here, the volume of the molded product is calculated by measuring the dimensions.

Next, the basic configuration according to the present invention is illustrated in FIGS. 3A and 3B.

Although this example may be used as a stand-alone, for example, corner shock absorber, it can also be used as a side part for sleeve packaging as illustrated in FIG. 2 above.

The packaging cushioning device 4 of the present invention has a two-layer structure with a low foaming synthetic resin layer 4b on the inside and a high foaming synthetic resin layer 4a on the outside. The ridgeline part of the layer 4a is opened in the entire length direction, and the internal low foam layer 4b is formed in this part.
The portion is provided in a protruding manner, and a reinforcing portion by the low foam layer 4b is formed along the entire length of the ridge line, thereby reinforcing the entire portion in the length direction.

Here, FIG. 3B shows the outer surface of A.

The reinforced portion by the low foam layer 4b may be formed over the entire length direction of either or both of the other two ridge lines, as shown by the imaginary line in the figure.

In this way, by forming the reinforcing portion by the low foam layer 4b along the entire length of either or both of the other two ridge lines, it will not only be reinforced against the stacking load direction intended by the present invention. Since it is reinforced against external forces from one or two directions, external pressure such as impact is dispersed in two or three directions, further enhancing the cushioning effect and increasing the range of uses.

The packaging shock absorber 4 thus formed is used so that the ridgeline portion of the low foam layer 4b having the reinforcing portion can be positioned in the stacking load direction.

The proposed packaging cushion as described above has a two-layer structure with a low foaming synthetic resin layer with excellent rigidity on the inside and a high foaming synthetic resin layer with excellent elasticity on the outside. At least the ridgeline portion located in the direction of the stacked load is reinforced with a low-foaming synthetic resin layer over the entire length of the ridgeline, so that the reinforcing section serves as a support for the stacked load. It acts as a support and increases its strength, preventing the load from collapsing even when the stored items are heavy or stacked in multiple stages, and also has the effect of preventing cracking due to bottoming out.

Furthermore, by using highly foamed synthetic resin on the outside, the stored items are suitably protected from external pressure.

Furthermore, the overall structure is made up of a high foam layer and a low foam layer that are fused together and molded into two layers to impart cushioning properties and compressive strength to the desired areas, so it has a high level of strength despite its small volume. It is possible to manufacture certain items and reduce storage and transportation costs.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional packaging form, Fig. 2 is a perspective view showing a packaging form according to the present invention, Fig. 3 A,
B is an explanatory diagram showing the basic structure of the packaging cushioning device according to the present invention. 1: Product, 2: Cushioning fixing material, 3: Cardboard box, 4: Packaging cushion.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a packaging cushioning device having a two-layer structure with a low foaming synthetic resin layer on the inside and a high foaming synthetic resin layer on the outside, located at least in the stacking load direction at the ridgeline portion. A packaging cushioning device in which the ridgeline portion is made of low-foaming synthetic resin along the entire ridgeline length direction. 2 Claim No. 1 for Utility Model Registration Using Molded Products of Highly Foamed and Low Foamed Synthetic Resin Beads
Cushioning materials for packaging as described in section. 3. The packaging cushion according to claim 2, wherein the highly foamed and low foamed synthetic resin beads are made of expanded polystyrene resin.