JPS5836701Y2 - packaging material - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a packaging material characterized by using a known single-sided corrugated board as a base material, and having a novel process applied to the lower side thereof.

Single-sided corrugated cardboard has the characteristics that it is possible to roll up a strip and it is easy to add creases, so if you use it to package items, This not only makes it possible to automate packaging, but also allows the core paper to exhibit rigidity in a certain direction along the paper surface, similar to double-sided corrugated paper, and to provide cushioning properties in the thickness direction. Because it exhibits the same shape retention properties as paperboard, it also eliminates the need for cushioning materials such as batts, so compared to paperboard that has the same shape retention properties, single-sided corrugated cardboard is more resource- and labor-saving. It has been found that this method has the advantage of being able to package articles at a lower cost on both sides.

However, when it was actually used, it was found that this single-sided corrugated board had the following drawbacks.

That is, for example, fluorescent lamps that have an elongated box-like shape have conventionally been wrapped by being artificially inserted one by one into elongated boxes made of paperboard that have been made in advance. However, in order to automate the packaging by taking advantage of the above-mentioned advantages of single-sided corrugated cardboard, we tried wrapping it in single-sided corrugated cardboard. It was found that the product could not be used for packaging such products because it produced dark black stripes with the same pitch as the mountains, significantly reducing its commercial value.

Therefore, the inventor has conducted various experimental studies on the causes of such striped patterns, and found that such striped patterns sometimes disappear when wiped with a cloth, and sometimes do not. This may still occur even if a polyethylene film, etc. is interposed between the glossy surface and the striped pattern will not disappear even if wiped with a cloth, and the luster may change in the striped area. It turned out that there was.

From these results, it was found that there are two causes for the formation of the above-mentioned striped pattern.

In other words, one of them, which disappears when wiped, is due to the adhesion of the substance contained in the core paper to the glossy surface, and the other, which does not disappear even when wiped, is due to the fact that the substance contained in the core paper adheres to the glossy surface. This occurs in proportion to the contact pressure of the core paper against the glossy surface, and this is due to changes occurring in the surface of the coating layer that makes up the glossy surface itself.
It was found that this is due to the fact that the coating layer contains a mixture of materials that harden quickly and materials that harden slowly over a long period of time (for example, alkyd resin).

Therefore, based on the above knowledge, this idea was developed for the automatic packaging of products with the above-mentioned coated surface, that is, the surface has a strong glossy surface even though the hardness has not yet become high enough. The purpose is to provide a packaging material made of particularly suitable single-sided corrugated cardboard, and its gist is to:
It is proposed that a part of the base paper of the packaging material made of single-sided corrugated cardboard be softened in advance.

To explain the embodiment with reference to the drawings, the packaging material 1 of the embodiment shown in FIG. In the manufacturing process of the single-sided corrugated board 4, which is made by pasting the base paper 3 on the base paper 2, the finished single-sided corrugated board 4 is passed through a pair of pressure rollers 5 and 6 on the upper and lower sides of the base paper. By crushing a part of the base paper 3, that is, a portion having a constant width α, along the longitudinal direction of the single-sided corrugated cardboard 4 as shown in FIG. 2, the rigidity of the base paper 3 in the thickness direction of the cardboard This made the waist particularly weak in some parts.

Note that the crushing process of the base paper 3 may be performed while the base paper 3 is dry, but more preferably, this is performed while the base paper 3 is slightly moistened with water vapor or the like. .

The softening of the base paper 3 by crushing the base paper 3 in the thickness direction using the pressure rollers 5 and 6 as described above can be done not only by using rolls with a smooth surface but also by using corrugated rolls. The application may be performed by passing between such pressure rollers.

The above embodiment shows an example in which a part of the base paper 3 of single-sided corrugated paperboard is made flexible in the thickness direction of the cardboard by simply crushing the base paper 3 in advance. In the embodiment, as shown in FIG. 3, in the manufacturing process of the single-sided corrugated board 4, the completed single-sided corrugated board 4 is cut into a large number of parallel slit-forming cutters 7, 7.
. . . The slit forming blade 7 cuts a part of the base paper 3, that is, a portion 4a of the base paper 3 over a certain width α.
Cut the step crest 3a in a direction across the step crest 3a,
A large number of slits 8, 8, .
After forming the slits 8, 8, . The part 4a may be made even more flexible.

Next, the operation will be explained. Since the packaging material 1 according to this invention is made of single-sided corrugated cardboard 4, a long strip can be wound up into a roll as shown in FIG.

Therefore, when using the packaging material 1 of this invention, for example, as shown in FIGS. 5 and 6, the packaging material 1 wound into a roll can be unwound from one end to automate the packaging of products. In this, an elongated box-shaped product 10 such as the fluorescent light fixture is sent in the direction of the arrow by a conveyor device (not shown), and during that time, it is automatically wrapped by the unwound packaging material 1. However, since the packaging material 1 of this invention has the above-described structure, as shown in FIGS.
When the part 4a in contact with the glossy painted surface 10a of the product 10 is softened in advance in the thickness direction of the corrugated board according to this invention, in this softened part 4a, the base paper 3 is When pressure is applied in the direction of crimping onto the painted surface 10a, this portion of the base paper 3 becomes flexible,
The step crest 3a is deformed as shown in FIG. 7, and comes into contact with the painted surface 10a with a wider contact area than if the base paper 3 was not softened.

Therefore, according to the packaging material 1 according to this invention,
The pressure per unit area of the base paper 3 that the painted surface 10a receives is reduced accordingly, and the striped pattern due to the contact action of the step crest 3a of the base paper 3 does not occur.

However, the effect of eliminating the striped pattern solved by this invention is obtained by not applying strong pressure to the corrugated top of the base paper, so the striped pattern that occurs regardless of the pressure and disappears when wiped with a cloth etc. However, such striped patterns should be prevented by interposing an appropriate sheet such as polyethylene film parchment paper between the base paper and the painted surface, or wiped off with a cloth etc. You may also do so.

As described above, the packaging material according to this invention can be used to carry products with a coated surface that is not particularly hard and has a highly glossy surface, even if the base paper is made particularly flexible. If the packaging is done so that the part of the base paper is in contact with the painted surface, the packaging can be done without creating an impression on the painted surface due to the corrugated top of the base paper. When the packaging material is rolled up into a strip, it is possible to easily automate the packaging of products by taking advantage of the characteristics of single-sided cardboard.

In addition, in the above embodiment, the present invention was explained by showing an example in which the packaging material of the present invention can be implemented as an automatic packaging material for fluorescent lamp equipment, but the use of the packaging material according to this invention is limited to the above embodiment. It can be used not only for other electrical appliances but also for packaging office furniture and various other products with glossy painted surfaces.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the manufacturing process of one embodiment of the packaging material according to this invention, Fig. 2 is a cross-sectional view taken along the line II-II of Fig. 1, and Fig. 3 shows the manufacturing process of another embodiment. Perspective view shown, No. 4
The figure is a sectional view taken along the line IV--IV in FIG. 3, FIG. 5 is a side view showing an example of the use of the wrapping paper according to this invention, FIG. It is a partially enlarged view of the cross section taken along the line vii. 1... Packaging material, 3... Base paper, 4...
... Single-sided cardboard, 4a ... Part of base paper (softened part).

Claims (1)

[Scope of utility model registration request] A band-shaped packaging material made of single-sided corrugated cardboard, in which a corrugated core paper having peaks and troughs in a direction crossing the longitudinal direction of the liner paper is attached to one side of the liner paper, and one side of the core paper A packaging material characterized by crushing a portion of a certain width along the longitudinal direction of a corrugated cardboard to make the portion flexible in the thickness direction of the corrugated cardboard.