JPS59103737A - Reinforced corrugated cardboard packing vessel and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a packaging container made of reinforced corrugated paperboard, particularly a packaging container in which the ruled line between the container body and the flap connected to the opening edge of the container and its surrounding area are partially reinforced with a reinforcing agent. and its manufacturing method.

Conventionally, as shown in Japanese Utility Model Publication No. 55-47130 proposed by the applicant, packaging containers of this type include at least one of a container body, a liner with 7 laps around the ruled line, and a center liner including the ruled line. The one to which the reinforcing agent was applied is
There is no difference in compressive strength from a packaging container in which the entire packaging container is reinforced with a reinforcing agent, and the amount of reinforcing agent used can be reduced and the product can be obtained at a low price.

However, in this structure, the rigidity is increased by applying a reinforcing agent to the ruled line corresponding to the 7-rubbed fold, so there is no problem when it is done manually, but when it is used mechanically such as an automatic packaging machine. When the lid is closed, a sudden force is applied to the reinforced ruled line by the folding of the flap, and the liner located on the outer surface is broken at the fold position, which not only spoils the appearance but also damages the connection between the flap and the container body. There was a debilitating inconvenience. For this reason, if the reinforcing agent applied to the ruled lines is adjusted to prevent the flexibility of the ruled line portions from being lost, the compressive strength will sharply decrease.

As a result of research to eliminate these disadvantages, the present invention has found that a reinforced corrugated cardboard packaging container with flap pressure strength can be obtained by forming an area where no reinforcing agent is applied in the area where the flap will be folded. The gist of the first invention is that a flap (3) is connected to at least one opening edge of a container body (1) formed of corrugated paper via a ruled line (2). The container body (1) and the 7-lap (3) including the ruled line (2) and the surrounding area of the ruled line (2)
When the flap (3) is closed, the ruled line (2) is formed by coating the reinforcing agent (6) on the central liner (5).
The second invention is characterized in that an area (8) where the reinforcing agent (6) is not applied is formed corresponding to the area that becomes the fold (7) of the reinforcing cardboard packaging container of the first invention. The purpose is to provide a method for manufacturing a reinforced corrugated cardboard packaging container that can be easily manufactured, and its gist is to attach a - side liner (4) and a corrugated core liner (5), Then, when the core liner (5) is coated with adhesive (9) and further formed into a packaging container, the container body (1) and the 7-lap (3) including the ruled line (2) and the area around the ruled line (2) are removed. ) A narrow coating means (1G) facing the core liner (5) is provided, and the reinforcing agent (6) is applied and formed through the -yaco) to the area where the reinforcing agent (6) is applied. Reinforced corrugated paperboard A with linear uncoated area (8)
, and before the curing of the reinforcing agent (6) is completed, line the ruled line (2) by aligning the reinforcing agent-unapplied area (8) of the reinforced corrugated paperboard A with the corrugated top part σ2) of the toss scorer συ.
It is characterized by additionally forming.

A more detailed explanation will be given below with reference to FIGS. 1 to 5 showing an example of the implementation of the present invention.

The packaging container shown in the first figure is an embodiment of the present invention and is made of corrugated paper, and the upper and lower opening edges of the container body (1) are provided with inner and outer fluffs (3) (3
) are connected consecutively through a ruled line (2), and the ruled line (2
), and is similar to the conventional product in that the reinforcing agent (6) is applied and formed across the container body (1) and the 7-lap (3) in the vicinity of the ruled line (2), but as shown in the second figure. As shown in FIG. A region (8) is formed.It is preferable that the uncoated region (8) has a width smaller than or equal to the width of the ruled line (2).

Next, to explain the manufacturing method, as shown in the third diagram, the core liner (5) is heated and dried with a preheater (1).
is step-formed by a step-forming roll α4, and also by a gluing device α9.
After being glued to the top of the step, it is laminated with an example liner (4) heated by a brake heater αe. Next, the core liner (5) is further glued to the top of the step on the other side using a gluing device αη, and as shown in FIGS. 1 and 2, ruled lines (2) are additionally formed when the packaging container is later formed. The reinforcing agent (61) is partially sprayed by a reinforcing agent applicator α second onto the area including the ruled line (2) and surrounding the ruled line (2), which will become the container body (1) and the flap (3). Specifically, as shown in Figure 4, the spray nozzle α9 of the reinforcing agent applicator (18) is provided facing the core liner (5).
A spray nozzle ac is installed at a distance from the core liner (5).
A narrow covering means α0) for covering the core liner (5) is provided across the spray area of the tr and parallel to the direction of light of the core liner (5). The one shown is a narrow plate with an isosceles triangular cross section, and the width of its base (10a) is made to match the width of the uncoated area. Therefore, when forming the reinforcing agent (6) by applying the reinforcing agent (6) to the core liner (5) through the coating hand 12 (10) with the spray nozzle, the reinforcing agent application area has a narrow uncoated area (8) in a linear shape. is formed.

Thereafter, as shown in the second diagram, the other side liner (20) is laminated to the core liner (5) to form partially reinforced corrugated cardboard A, and heated with a hot plate device (2I) to the gelatinization temperature to proceed with lamination. do. Partially reinforced corrugated paperboard A, which has been laminated, is coated with a reinforcing agent (6
) is continuously fed to the slitter/scorer device (24 circles) to add and form ruled lines (2) and to cut.At this time, as shown in Figure 5 in detail, A ruled line (2) is added by aligning the α line with the reinforcing agent-unapplied area (8) of the core liner (5).When scenting, use the scorer 0D to match the reinforcing agent-unapplied area (8). The top of the step (1) of the scorer (11)
A ruled line (2) having a width on the left and right is formed with 21 as the center, but at this time, since the reinforcing agent (6) has not yet solidified, the tissue is not destroyed even by crushing by the scorer a1).

The results of a pressure strength test in comparison with a conventional product in which the uncoated area (8) is not provided on the ruled line (2) in a container having the same shape as the product according to the present invention are as follows.

Size of cardboard packaging container used in the test: 434
280 x 42 vinegar m Paper quality: front/back liner-K2O0
Core liner SOP 180 Strengthening agent application area: 100 mtn including ruled lines Strengthening agent composition: Dextrin 46% (by weight) Water
50% Surfactant 0.1% Waterproofing agent 4.0% (corresponding dextrin solid content ratio) Width of ruled line: 12.5 mm (indicated by X in Figure 3) For single compression For cross compression* Indicated by Y in Figure 2.

As is clear from the above results, as in the embodiment of the present invention, the container body (1) including the ruled line (2) and the area around the ruled line (2)
In the region strengthened with the reinforcing agent (6) across the flap (3), even if the crease of the ruled line (2) (an area where the reinforcing agent is not applied (8) is provided in the area where the force is applied), the conventional product (unapplied) A packaging container with a compressive strength and distortion amount that is not significantly different from that of a container (without a region) was obtained.In addition, in the packaging work of this product, even by mechanically opening the flap (3), Since the reinforcing agent-unapplied area (8) was formed corresponding to the position of the fold line (7) of the ruled line (2), the outer liner was completely prevented from breaking due to the folding of the 7-lap (3).

As is clear from the above description, according to the first aspect of the present invention, the ruled lines (
2), in which the reinforcing agent (6) is applied to the central liner (5) of the container body (1) and flap (3) in the vicinity of the ruled line (2), and the flap (3) is closed. When closing the lid, we formed an unapplied area (8) of the reinforcing agent (6) at the crease of the ruled line (2) (corresponding to the area that will be a force), so even if the mechanical folding operation of 7 laps (3) is performed, the outer side Since there is no fear that the liner will break at the fold (position of force), it is suitable for automatic packaging and has the effect of providing a reinforced cardboard packaging container that has no difference in pressure resistance from conventional partially reinforced packaging containers. .

Further, according to the second invention of the present invention, when manufacturing the packaging container of the first invention, when the packaging container is formed, the container body (2) includes the ruled line (2) and the portion around the ruled line (2). And in the area that will become the flap (3) - Center liner (
5), and the reinforcing agent (6) is applied and formed through the means (10), so that the uncoated area (8) is continuously formed in a straight line. Reinforced corrugated paperboard A in which a reinforcing agent application area is formed is obtained, and before the hardening of the reinforcing agent (6) is completed, an area (8) where no reinforcing agent is applied is formed.
) and the top of the step (12) of the scorer a1) are added to form the ruled line (2), so the uncoated area (8) is reliably formed at the position where the crease (7) of the ruled line (2) will be. In addition, since the ruled lines (2) are added and formed before the hardening of the reinforcing agent (6) is completed, the structure in the area where the reinforcing agent is applied is not destroyed at that time, and the reinforced cardboard packaging container has excellent pressure resistance. The effectiveness of being able to produce;

[Brief explanation of the drawing]

What is shown in the drawings shows an example of the implementation of the present invention.
The figure is a perspective view of the actual amount, Figure 2 is a line diagram for explaining the manufacturing process, Figure 3 is a sectional view taken along the line ■-■ in Figure 1, and Figure 4 is the line IV-IV in Figure 2. A cut-away sectional view, FIG. 5, shows v- in FIG.
It is a sectional view taken along the v line. (1) Container body (2) Ruled line (3)
...7 web (4)...-side liner (5)...
・Central liner (6)...Reinforcing agent (7)...Fold line (8)...Reinforcing agent-unapplied area (9)...Adhesive (10)...Coating means Ql)・・Scorer α snoring・Top of scorer step

Claims (1)

[Claims] Top: A flap (3) is connected to at least one opening edge of a container body (1) formed of corrugated paper via a ruled line (2), and the area including the ruled line (2) and the area around the ruled line (2) is A reinforcing agent (6) is applied to the central liner (5) of the container body (1) and the flap (3), and the flap (3) is coated with the reinforcing agent (6).
) When closing the lid, the crease of the ruled line (2) (the area that acts as a force (L)
A reinforcing corrugated cardboard packaging container 2-side liner (4), characterized in that a region (8) not coated with a reinforcing agent (6) is formed in a corresponding manner, and a corrugated core liner (5) are attached. Then, after applying the adhesive (9) to the core liner (5), when forming the packaging container, the container body (1) and flaps (3) including the ruled line (2) and the area around the ruled line (2) are removed.
) is provided with a narrow covering means α0) facing the core liner (5), and the reinforcing agent (6) is applied through the means QO) to form a straight line in the application area of the reinforcing agent (6). A reinforced corrugated paperboard A having a non-applied area (8) of the shape is formed, and before the curing of the reinforcing agent (6) is completed, the reinforced corrugated paperboard A has an unapplied area (8) of the reinforcing agent and a scorer α.
A method for manufacturing a reinforced cardboard packaging container, characterized in that a ruled line (2) is added by aligning the top part (12+) of B.