JPH0348064Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a corrugated box with a rust-preventing function for metal products, especially iron products.

In order to fully perform the rust prevention function of metal products, the requirements for a cardboard box are that the cardboard is moisture-proof and waterproof, that the structure of the cardboard box allows the product to be packaged in a hermetically sealed manner, and that it must also be corrosion-proof. Examples include actively preventing corrosion of products with agents. Therefore, conventional cardboard boxes of this type are
Since waterproof paper was used for the outer liner and anticorrosive paper (coated or impregnated with a volatile corrosion inhibitor) was used for the inner liner, it was faster than using ordinary corrugated paperboard. This is inconvenient in manufacturing, and combined with the price of the liner, the cost of cardboard boxes inevitably becomes high. In addition, even if the outer liner has a moisture-proof function, the inner liner does not have a moisture-proof function, and the inner liner is exposed to the outside air through the cut edge of the cardboard.
It was difficult to ensure moisture resistance, and the volatile corrosion inhibitor easily disappeared from the cut end.

This invention solves the above-mentioned drawbacks, and aims to provide a corrugated cardboard box with a structure that can sufficiently perform a rust prevention function at a low cost.

Next, some embodiments of this invention will be described based on the drawings.

First of all, FIGS. 1 and 2 show a first embodiment, in which a corrugated cardboard F as a material for a corrugated box _G1 is made by bonding front and back liners 2 and 3 to both sides of a corrugated core 1. A plastic film 4 made of polyethylene or the like is laminated on the outer surface of the back liner 3, and a volatile corrosion inhibitor 5 is further applied to the outer surface of the plastic film 4. By the way, plastic is an excellent electrical insulator, so it is desirable to use a film that does not carry static electricity in cardboard boxes for transporting electronic products such as ICs and LSIs to prevent static electricity damage to the products. As such a plastic film, there may be mentioned one in which conductive fine particles such as carbon black are blended with a plastic material.

There are various types of volatile corrosion inhibitors depending on the type of metal, but examples for iron and iron alloys include zinclohexylammonium nitrite, zinclohexylammonium caprylate, and zinclohexylammonium carbonate. Examples for copper and copper alloys include benzotriazole and alkylbenzotriazole.

Note that the volatile corrosion inhibitor may be mixed with the plastic material of the film 4.

When the cardboard box G ₁ configured as described above is closed, the inside is completely sealed by the film 4 if the metal product is packaged by sealing it with packing tape or the like. Since the volatile corrosion inhibitor fills the box in a saturated state, corrosion of metal products can be effectively prevented. Furthermore, since a plastic film 4 is laminated to the inner liner 3, even if the cut end 6 of the cardboard is open, the film 4 blocks ventilation into the box. You can expect a wall.

Furthermore, since the inner surface of the box _G1 is made of the film 4 and is soft to the touch, damage to the product can be prevented.

Reference numeral 21 denotes a partition, which is preferably coated with a film 4 and a volatile corrosion inhibitor 5 on both sides.

The applicant has already completed a very efficient and advantageous method for manufacturing corrugated cardboard with a plastic film attached to one side as described above.
It has already been filed as Japanese Patent Application No. 163974/1974.

Next, FIGS. 3 to 5 show a second embodiment, in which a film 4 coated with a volatile corrosion inhibitor 5 is pasted on the inner surface of a cardboard box _G2 . However, by attaching frames 9 and 10 made of synthetic resin that tightly fit each other to the edge of the box body 7 and the periphery of the lid 8, airtightness can be maintained simply by covering the lid 8. I'm starting to be able to do it. By the way, if a film mixed with a volatile corrosion inhibitor is used in the plastic material, the inhibitor will permeate the liner and leak slightly into the space inside the cardboard.
By sealing the cut end 6 of the cardboard with 10, it is possible to prevent the inhibitor from disappearing to the outside.

A cloth 11 made of flat yarn made of stretched plastic film is attached to the outer surface of the box _G2 .

Since the box _G2 is reinforced by the edging with the frames 9 and 10 and the cloth 11, it is most suitable as a returnable box that can be used repeatedly.

6 and 7 show a third embodiment, in which the cardboard box _G3 includes a box body 12 and a lid body 1.
The cut end 6 is sealed by forming an extended protruding piece 22 on each edge of the outer liner 2 and folding it inward and gluing it.

8 to 10 show a fourth embodiment, in which the cardboard box G ₄ has one side wall 17 for each assembly of the box body 14 and the lid 15.
The inner liner 3 forms an extended projecting piece 18 and is folded in half to form an extended protruding piece 18 on the other side wall 1.
9 and the film are heat welded together, and the other side wall 19 is
A connecting piece 20 provided on the side wall 17 is thermally welded to the outer surface of one side wall 17. Further, a seal piece 16 is provided on the edge of the lid body 15, which is an extension of the inner liner 3. When the seal piece 16 is provided in this way, the lid body 15
When it is covered, the film 4a of the sealing piece 16 is thermally welded to the outer surface of the box body 14, and complete airtightness can be ensured depending on the way the lid is closed.

The cardboard box of this invention has a plastic film that has a rust prevention function using a volatile corrosion inhibitor attached to the inner surface, and has a sealed structure using the plastic film so that the inside can be filled with an atmosphere of the corrosion inhibitor. Because of this, it has both the effective conditions required for rust prevention of metal products and can reliably fulfill each function, so it exhibits a long-term rust prevention effect when transporting and storing metal products. Furthermore, since the inner surface is made of plastic film and is soft against the product, damage to the product can be prevented, and the structure is simple, suitable for mass production, and can be provided at low cost.

[Brief explanation of the drawing]

Figures 1 and 2 show the first embodiment of this invention, in which Figure 1 is a perspective view of the box, Figure 2 is an enlarged sectional view taken along line A--A in Figure 1, and Figure 3 is a perspective view of the box. 5 to 5 show the second embodiment, and FIG. 3 is a perspective view of the second embodiment.
Figure 4 is an enlarged sectional view taken along line B-B in Figure 3;
The figure is an enlarged side view of part C in Figure 3, Figures 6 and 7.
The figure shows the third embodiment, and FIG. 6 is a perspective view of the box, and FIG. 7 is an enlarged sectional view taken along line D-D in FIG. 6.
FIGS. 8 to 10 show the fourth embodiment,
FIG. 8 is a perspective view of the box, FIG. 9 is an enlarged sectional view taken along line E--E in FIG. 8, and FIG. 10 is a partially enlarged sectional view showing the seal structure when the lid is closed. 1... core, 2, 3... liner, 4... plastic film, 5... volatile corrosion inhibitor.

Claims (1)

[Claims for Utility Model Registration] 1. Front and back liners are bonded to both sides of the corrugated core, and the outer surface of the liner that forms the inner surface of the box is made of plastic that has a rust-preventing function using a volatile corrosion inhibitor. Paste the film,
A corrugated cardboard box with a rust-preventing function characterized by having a sealed structure using a plastic film so that the inside of the box can be filled with an atmosphere of a corrosion inhibitor. 2. The corrugated box according to claim 1 of the utility model registration, characterized in that a volatile corrosion inhibitor is mixed into the plastic film. 3. The cardboard box according to claim 1, which is characterized in that a volatile corrosion inhibitor is coated on the outer surface of the plastic film.