JP3123104U - Paper cardboard - Google Patents

Abstract

The present invention provides a paper cardboard that does not warp due to the influence of moisture or the like and that can ensure a higher rigidity.
SOLUTION: A paper core material 5, a paper cover material 8 adhered to the front and back surfaces of the core material 5, and a release paper 11 detachably attached to an exposed surface of the cover material 8 are provided. In the paper cardboard 1, the core material 5 includes a core material body 2 in which a plurality of concave and convex portions 202a and 202b are formed, and a moisture-proof and waterproof coating layer formed on the front and back surfaces of the core material body 2 3, and the cover material 8 includes a cardboard cover material body 6 and a waterproof and moisture-proof coating layer 7 formed on the front and back surfaces of the cover material body 6. , 202b is characterized in that the shape in the plane or bottom view is formed in a polygon of pentagon or more, thereby making it possible to obtain higher rigidity.
[Selection] Figure 1

Description

  The present invention relates to a paper cardboard, and more particularly to a paper cardboard that can prevent warping due to the influence of moisture or the like and has increased rigidity.

  Conventionally, a board made of polystyrene has been used in various fields, and this board is used over a wide range because it has moisture resistance and waterproofness and does not warp due to the influence of moisture or the like. .

  However, it has been pointed out that this board made of polystyrene cannot be recycled, and therefore it cannot meet the recent demand for protection of the global environment. For this reason, in recent years, paper corrugated cardboard has been increasingly used in various fields in place of polystyrene boards.

  Here, as is well known, the paper cardboard is constituted by adhering cardboard or the like to the front and back surfaces of a paper core having a corrugated surface, and when this is used as various boards It can be recycled after use, and even when incinerated, it does not emit harmful substances and can contribute to the global environment.

  However, since the corrugated core material is conventionally used, the paper corrugated board is weak against the force pushed from the upper side or the lower side, and is crushed when pushed from the upper side or the lower side with a strong force. In addition, there is a problem that it is easy to bend along the wave portion.

  Further, it has been pointed out that paper corrugated cardboard is vulnerable to moisture and the like and particularly warps due to the influence of moisture.

Therefore, in the past, the present inventor has proposed a paper corrugated board in which a plurality of uneven portions are formed on the core material, and a moisture-proof and waterproof film layer is formed on the front and back surfaces of the core material on which the plurality of uneven portions are formed. In addition, according to this paper cardboard, it is possible to increase the overall strength and to suppress the influence of moisture and the like, thereby preventing warpage.
JP 2003-136616 A

  However, in the above-described paper cardboard, since the uneven portion formed on the core material has a quadrangular shape in a planar view, a certain degree of rigidity can be secured, but it is difficult to obtain a stronger rigidity.

  Therefore, an object of the present invention is to provide a paper corrugated cardboard that does not warp due to the influence of moisture or the like and that can ensure a higher rigidity.

The paper cardboard of the present invention is a paper cardboard comprising a paper core material and a paper cover material bonded to the front and back surfaces of the core material,
The core material comprises a core material body in which a plurality of irregularities are formed, and a moisture-proof and waterproof coating layer formed on the front and back surfaces of the core material body,
The cover material comprises a cardboard cover material body, and a waterproof and moisture-proof coating layer formed on the front and back surfaces of the cover material body,
Each of the concavo-convex portions is characterized in that a shape in a plane or bottom view is formed in a polygon of pentagon or more.

  In the paper corrugated cardboard of the present invention, a plurality of uneven portions are formed in the core material, and each of these uneven portions is formed to be a pentagon or more polygon in the plane or bottom view, so that the shape is simply a quadrilateral shape. Compared with the case where the uneven portion is formed, higher rigidity can be obtained.

  The paper corrugated cardboard of the present invention has a paper core material, and the core material is formed on the surface of the core material body having a plurality of irregularities formed on the front and back surfaces of the core material body. A moisture-proof and waterproof coating layer.

  Further, a cover material is bonded to the front and back surfaces of the core material, and the cover material includes a cardboard cover material body and a waterproof and moisture-proof coating layer formed on the front and back surfaces of the cover material body. is doing.

  And the uneven | corrugated | grooved part in the said core material main body has formed the shape in a plane or bottom view into a polygon more than a pentagon.

  Here, it is preferable that the release paper is detachably attached to the surface of the cover material via an adhesive layer. By this, the release paper is peeled to expose the adhesive layer, so that a photograph, a poster, etc. Can be attached.

  An embodiment of the paper cardboard of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view for explaining the structure of the paper cardboard of this embodiment. In the figure, 1 is the paper cardboard of this embodiment. .

  The paper corrugated board 1 in this embodiment has a core material, that is, in the figure, 5 is a core material. In this embodiment, the core material 5 is a paper core material main body and this core. It is comprised by the coating layer formed in the front and back of a material main body, and the contact bonding layer formed in this coating layer.

  Here, the core body 2 will be described. FIG. 2 is a plan view of the core body 2, and FIG. 3 is a cross-sectional view taken along the line AA in FIG. The material body 2 is configured by forming a large number of uneven portions 202a and 202b on a paper plate-like material 201.

  In the present embodiment, each of the concave and convex portions 202a and 202b has a hexagonal shape in the plane view and the bottom view, and the convex portions 202a and the concave portions 202b are arranged so as to be adjacent to each other and formed in three rows. is doing.

  The method for forming the concave and convex portions 202a and 202b is not particularly limited. For example, a plate is provided between a pair of rollers that are arranged so that a plurality of convex portions are formed and the convex portions do not collide with each other. It can be easily formed by passing the shaped material 201.

  Next, in FIG. 1, a moisture-proof and waterproof coating layer 3 is formed on the front and back surfaces of the core body 2 on which a large number of uneven portions 202a and 202b are formed. It is covered with this coating layer 3.

  Here, the coating layer 3 will be described. In this embodiment, resin paste is sprayed on the front and back surfaces of the core body 2, and then hot air is sprayed on the sprayed resin paste to form the resin paste. Thus, the coating layer 3 is formed on the front and back surfaces of the core body 2.

  Next, in FIG. 1, 4 is an adhesive layer. That is, in this embodiment, the adhesive layer 4 is formed at the apex portions of the uneven portions 202a and 202b in the core body 2 on which the coating layer 3 is formed, and the adhesive layer 4 is dried by hot air. The film layer 3 is formed by further spraying a resinous paste. As described above, in the present embodiment, the core material 5 includes the core material body 2, the coating layer 3 formed on the front and back surfaces of the core material body 2, and the apexes of the uneven portions 202 a and 202 b in the core material body 2. It is comprised by the contact bonding layer 4 formed in the part.

  Next, a cover material is bonded to each of the front and back surfaces of the core material 2. That is, 8 is a cover material in the figure, and in this embodiment, the cover material 8 is a cover material body 6 made of cardboard, and a waterproof and moisture-proof coating formed on the front and back surfaces of the cover material body 6. The layer 7 is bonded to the front and back surfaces of the core material 5 through the adhesive layer 4.

  In the present embodiment, the coating layer 7 constituting the cover material 6 is formed by spraying resin paste on the front and back surfaces of the cover material body 6 in the same manner as the formation of the coating layer 3 in the core material 2. It is formed by spraying hot air on the paste and drying the resin paste.

  Next, in the figure, 10 is an adhesive layer formed on the cover material 8, and in the figure, 11 is a release paper that is detachably attached to the adhesive layer 11. In the paper cardboard 1 in this embodiment, An adhesive layer 10 made of a resinous glue is formed on the surface of the cover material 8 on the side opposite to the core material, that is, the exposed surface, and a release paper 11 is attached to the adhesive layer 10 so as to be detachable. ing. In this way, it is possible to attach a photograph or the like to the cover material 8 by peeling the release paper 11 and exposing the adhesive layer 10.

  Next, the operation of the paper corrugated board 1 of this embodiment configured as described above will be described. In the paper corrugated board 1 of this embodiment, the core body 2 is covered with a moisture-proof and waterproof coating layer 3, and the core Since the moisture-proof and waterproof coating layer 7 is also formed on the front and back surfaces of the cover material 8 bonded to the front and back surfaces of the material 5, it is possible to effectively prevent warping and twisting due to the influence of moisture and the like. Is possible.

  The core body 2 constituting the core material 5 is configured by forming a large number of uneven portions 202a and 202b on the plate-like material 201, and the uneven portions 202a and 202b are respectively in the plane and bottom view. Because the shape is hexagonal, it has a strong durability against pressure from above and below, and even when pressed with a strong force from above and below, it will not be crushed, and will not be twisted or bent. Even with strong durability.

  Thus, in the paper cardboard 1 of the present embodiment, it is possible to obtain higher rigidity, and it is possible to effectively prevent warping, twisting, and the like due to the influence of moisture and the like due to the presence of the coating layer. .

  In the above-described embodiment, when the concavo-convex portions 202a and 202b are formed in a hexagonal shape in the planar view and the bottom view, and the convex portions 202a and the concave portions 202b are arranged adjacent to each other. However, it is not always necessary to form the uneven portions 202a and 202b in this way, and any shape may be used as long as the shape in the plane or bottom view is a pentagon or more.

  For example, in the concavo-convex portions 202a and 202b shown in FIGS. 4 and 5, the shape in the plane visual field and the bottom visual field is a pentagonal shape, and the convex portions 202a and the concave portions 202b are formed at a slight interval. In this manner, the uneven portions 202a and 202b may be formed.

  In the above-described embodiment, the adhesive layer 10 is formed on the exposed surface of the cover material 8 and the release paper 11 is detachably attached to the adhesive layer 10. The paper 11 is not necessarily required, and may be provided with these.

  The paper cardboard of the present invention is a paper cardboard having a core material having a plurality of uneven portions and a cover material bonded to the front and back surfaces of the core material. In addition, the uneven portion formed in the core material has a polygonal shape of a pentagon or more in the plane and bottom view, thereby preventing warpage due to the influence of moisture and increasing the rigidity. Applicable to all cardboard.

It is sectional drawing for demonstrating the structure of the Example of the paper cardboard of this invention. It is a perspective view for demonstrating the core material main body in the Example of the paper cardboard of this invention. It is the sectional view on the AA line in FIG. It is a perspective view for demonstrating the other form of the core material main body in the Example of the paper cardboard of this invention. It is the BB sectional view taken on the line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper corrugated board 2 Core material main body 201 Plate-shaped material 202a Convex part 202b Concave part 3 Coating layer 4 Adhesive layer 5 Core material 6 Cover material main body 7 Coating layer 8 Cover material 10 Adhesive layer 11 Release paper

Claims (2)

A paper cardboard (1) comprising a paper core material (5) and a paper cover material (8) bonded to the front and back surfaces of the core material (5),
The core material (5) includes a core material body (2) in which a plurality of concave and convex portions (202a, 202b) are formed, and a moisture-proof and waterproof coating formed on the front and back surfaces of the core material body (2). A layer (3),
The cover material (8) comprises a cardboard cover material body (6) and a waterproof and moisture-proof coating layer (7) formed on the front and back surfaces of the cover material body (6).
The corrugated portion (202a, 202b) is a paper corrugated board having a shape in a plane or bottom view that is a pentagon or more polygon. A paper core material (5), a paper cover material (8) adhered to the front and back surfaces of the core material (5), and a release paper (11) detachably attached to the surface of the cover material (8) A paper cardboard (1) comprising:
The core material (5) includes a core material body (2) in which a plurality of concave and convex portions (202a, 202b) are formed, and a moisture-proof and waterproof coating formed on the front and back surfaces of the core material body (2). A layer (3),
The cover material (8) comprises a cardboard cover material body (6) and a waterproof and moisture-proof coating layer (7) formed on the front and back surfaces of the cover material body (6).
The corrugated portion (202a, 202b) is a paper corrugated board having a shape in a plane or bottom view that is a pentagon or more polygon.

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