JP2003001735A - Plastic corrugated board - Google Patents
Plastic corrugated boardInfo
- Publication number
- JP2003001735A JP2003001735A JP2001192826A JP2001192826A JP2003001735A JP 2003001735 A JP2003001735 A JP 2003001735A JP 2001192826 A JP2001192826 A JP 2001192826A JP 2001192826 A JP2001192826 A JP 2001192826A JP 2003001735 A JP2003001735 A JP 2003001735A
- Authority
- JP
- Japan
- Prior art keywords
- ribs
- plastic corrugated
- corrugated board
- plastic
- angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プラスチック段ボ
ールに関し、さらに詳しくは、平面圧縮強度及び耐久性
の向上を図ったプラスチック段ボールに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic corrugated board, and more particularly to a plastic corrugated board having improved planar compressive strength and durability.
【０００２】[0002]
【従来の技術】近年、プラスチック段ボールは、その耐
水性、軽量性、耐久性、及び緩衝性等を生かして魚箱や
リサイクル箱、または床面や壁面の養生材等として用い
られている。2. Description of the Related Art In recent years, plastic corrugated board has been used as a fish box, a recycle box, a floor or a wall surface curing material, etc. by taking advantage of its water resistance, light weight, durability and cushioning property.
【０００３】従来、このプラスチック段ボールは、２枚
のライナー層と複数本のリブによって構成され、図５
（ａ）に示すように、それぞれのライナー層２に対して
垂直にリブ３が形成されたもの（垂直リブ）、図５
（ｂ）に示すように、隣り合うライナー層２とリブ３と
が形成する、複数本のリブ３に垂直に交差する平面によ
り切断した断面が、三角形形状に形成されたもの（三角
形リブ）が知られている。また、プラスチック段ボール
は、押出し成形により作製されることが多い。Conventionally, this plastic corrugated board is composed of two liner layers and a plurality of ribs.
As shown in (a), ribs 3 are formed perpendicularly to each liner layer 2 (vertical ribs), as shown in FIG.
As shown in (b), the cross section formed by the liner layer 2 and the rib 3 which are adjacent to each other and which is cut by a plane perpendicular to the plurality of ribs 3 has a triangular shape (triangular rib). Are known. Further, plastic corrugated board is often produced by extrusion molding.
【０００４】しかし、図５（ａ）に示すように、垂直リ
ブのプラスチック段ボール１は、リブ３の真上から押し
圧力が加わった場合には、大きな圧縮強度を発揮する
が、リブ３に対して斜め方向から押し圧力が加わると座
屈しやすいという問題があった。また、図５（ｂ）に示
すように、三角形リブのプラスチック段ボール１は、押
出成形する際に２本のリブの重なる部分（三角形の頂点
部分）にヒケが出やすく、薄くなる為に、その部分の強
度が弱くなり、また、このプラスチック段ボール１に押
し圧力をかけた場合、構造上、２本のリブの重なる部分
に圧力が集中する為に、リブ３が折れやすいという問題
があった。However, as shown in FIG. 5 (a), the vertical corrugated plastic corrugated cardboard 1 exerts a large compressive strength when a pressing force is applied from directly above the ribs 3, but the vertical corrugated plastic corrugated cardboard 1 has a large compressive strength. There is a problem that buckling easily occurs when pushing pressure is applied diagonally. Further, as shown in FIG. 5B, in the plastic corrugated cardboard 1 having the triangular ribs, when the extrusion molding is performed, sink marks are likely to be formed in a portion where the two ribs are overlapped (the apex portion of the triangle), and the plastic corrugated cardboard 1 is thin. There is a problem that the strength of the portion becomes weaker, and when pressure is applied to the plastic corrugated board 1, the pressure is concentrated on the portion where the two ribs overlap due to the structure, so that the rib 3 is easily broken.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、かかる従来
の問題に鑑みてなされたものであり、その目的とすると
ころは、隣り合う２枚のライナー層とリブとが形成す
る、複数本のリブに垂直に交差する平面により切断した
断面が台形形状であるように形成されてなる（台形リ
ブ）という構成を採用することにより、平面圧縮強度及
び耐久性の向上を図ったプラスチック段ボールを提供す
ることにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a plurality of liner layers formed by two adjacent liner layers and ribs. By adopting a configuration in which a cross section cut by a plane perpendicular to the rib is formed into a trapezoidal shape (trapezoidal rib), a plastic corrugated board with improved planar compression strength and durability is provided. Especially.
【０００６】[0006]
【課題を解決するための手段】すなわち、本発明によれ
ば、少なくとも２枚のライナー層と、ライナー層の層間
を支持する複数本のリブとを備えてなるプラスチック段
ボールであって、隣り合う２枚のライナー層とリブとが
形成する、複数本のリブに垂直に交差する平面により切
断した断面が台形形状であるように形成されてなること
を特徴とするプラスチック段ボール、が提供される。That is, according to the present invention, there is provided a plastic corrugated board having at least two liner layers and a plurality of ribs for supporting the layers of the liner layers. There is provided a plastic corrugated board characterized by being formed so that a cross section cut by a plane perpendicular to a plurality of ribs formed by a liner layer and ribs of a sheet has a trapezoidal shape.
【０００７】本発明においては、前記台形の長辺を下底
Ｘ1、短辺を上底Ｘ2としたとき、下底Ｘ1と、前記台形
を構成する２本のリブとが為す２つの内角の角度の差が
２０°以内であることが好ましく、さらに、下底Ｘ1と
リブとが為す２つの内角の大きさが等しいことが好まし
い。また、上底Ｘ2とリブとの外角の大きさを角度θと
したとき、角度θが、０°＜θ＜９０°の関係を満足す
ることが好ましく、更に、角度θが、４５°≦θ≦７５
°の関係を満足することが好ましい。また、本発明にお
いては、隣り合う２枚のライナー層の層間のそれぞれの
台形形状が、同一の向きに形成されることが好ましい。In the present invention, when the longer side of the trapezoid is the lower bottom X 1 and the shorter side is the upper bottom X 2 , the lower bottom X 1 and the two ribs forming the trapezoid are two. It is preferable that the difference between the inner angles is within 20 °, and further, it is preferable that the two inner angles formed by the lower bottom X 1 and the rib are equal in size. Further, when the external angle between the upper base X 2 and the rib is an angle θ, it is preferable that the angle θ satisfies a relationship of 0 ° <θ <90 °, and further, the angle θ is 45 ° ≦. θ ≦ 75
It is preferable to satisfy the relationship of °. Further, in the present invention, it is preferable that the trapezoidal shapes between two adjacent liner layers are formed in the same direction.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照しながら説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【０００９】図１（ａ）、図１（ｂ）に示すように、本
発明のプラスチック段ボール１は、上述のように、少な
くとも２枚のライナー層２と、ライナー層２の層間を支
持する複数本のリブ３とを備えてなるプラスチック段ボ
ール１であって、隣り合う２枚のライナー層２とリブ３
とが形成する、複数本のリブ３に垂直に交差する平面６
により切断した断面が台形形状であるように形成されて
なることを特徴とする。このことより、リブ３がライナ
ー層２に対して斜め方向に形成されているために、プラ
スチック段ボール１にかけられる斜め方向からの押し圧
力に強くなり、且つライナー層２にリブ３が重なる部分
がないことから、押出成形の際にヒケが起きにくく、プ
ラスチック段ボールに薄い部分がないので、本発明は、
平面圧縮強度及び耐久性に優れたプラスチック段ボール
を提供することが出来る。As shown in FIGS. 1 (a) and 1 (b), the plastic corrugated cardboard 1 of the present invention has, as described above, at least two liner layers 2 and a plurality of liner layers 2 for supporting the layers. A plastic corrugated board 1 comprising two ribs 3 and two adjacent liner layers 2 and ribs 3.
A plane 6 formed by and that intersects the plurality of ribs 3 at right angles.
It is characterized in that the cross section cut by is formed in a trapezoidal shape. As a result, since the ribs 3 are formed obliquely with respect to the liner layer 2, the pressure applied from the oblique direction to the plastic corrugated cardboard 1 is strong, and there is no portion where the ribs 3 overlap the liner layer 2. Therefore, sink marks are unlikely to occur during extrusion molding, and since there is no thin portion in the plastic corrugated board, the present invention is
It is possible to provide a plastic corrugated board having excellent plane compression strength and durability.
【００１０】本発明のプラスチック段ボール１を製造す
る方法としては、特に制限はないが、例えば、汎用の押
出成形による方法を挙げることが出来る。The method for producing the plastic corrugated board 1 of the present invention is not particularly limited, but for example, a general-purpose extrusion molding method can be mentioned.
【００１１】また、プラスチック段ボール１の材料とし
ては、特に制限はないが、例えば、ポリプロピレンや高
密度ポリエチレンを挙げることが出来る。The material for the plastic corrugated board 1 is not particularly limited, but examples thereof include polypropylene and high-density polyethylene.
【００１２】本発明においては、前記台形の長辺を下底
Ｘ1、短辺を上底Ｘ2としたとき、下底Ｘ1と、前記台形
を構成する２本の前記リブとが為す２つの内角の角度の
差が２０°以内であることが好ましく、さらに、下底Ｘ
1とリブとが為す２つの内角の大きさが等しいことが好
ましい。このことより、プラスチック段ボールにかけら
れる押し圧力を、複数本のリブが均等に分散して受ける
ことが出来ることとなる。In the present invention, when the long side of the trapezoid is the lower base X 1 and the short side is the upper base X 2 , the lower base X 1 and the two ribs constituting the trapezoid form 2 The difference between the angles of the two interior angles is preferably within 20 °, and further, the lower bottom X
It is preferable that the two internal angles formed by 1 and the rib are equal in size. As a result, the pressing force applied to the plastic corrugated board can be evenly distributed and received by the plurality of ribs.
【００１３】図２は、本発明のプラスチック段ボール１
の別の一実施形態を示す断面図であるが、図２に示す実
施形態では、前記台形構造を有する層を２層重ねること
により、プラスチック段ボール１にかけられる押し圧力
をより分散することが出来るので、平面圧縮強度の更な
る向上を図ることが出来る。尚、本発明のプラスチック
段ボール１は、少なくとも２枚のライナー層２と、ライ
ナー層２の層間を支持する複数本のリブ３とを備えてな
るプラスチック段ボール１であることから、この積層構
造を１層及び２層に制限するものでなく、３層以上の積
層構造を備えていても構わないものである。FIG. 2 shows a plastic cardboard 1 according to the present invention.
2 is a cross-sectional view showing another embodiment of the present invention, but in the embodiment shown in FIG. 2, by stacking two layers having the trapezoidal structure, the pressing force applied to the plastic corrugated board 1 can be more dispersed. Further, it is possible to further improve the plane compression strength. Since the plastic corrugated board 1 of the present invention is a plastic corrugated board 1 that includes at least two liner layers 2 and a plurality of ribs 3 that support the layers of the liner layer 2, the laminated structure 1 The number of layers and the number of layers are not limited to two, and may have a laminated structure of three or more layers.
【００１４】また、本発明においては、隣り合う２枚の
ライナー層２の層間のそれぞれの前記台形形状が、同一
の向きに形成されることが好ましい。図４に示すよう
に、前記台形形状が同一の向きに形成されない場合、す
なわち、隣り合うライナー層２の層間のそれぞれの前記
台形形状が、反対の向きに形成された場合には、２本の
リブの重なる部分４が数多く形成されることとなる。従
って、その部分では、押出成形の際にかなりのヒケが出
ることになり、プラスチック段ボールに多数の薄い部分
があることとなるので 図４に示すようなプラスチック
段ボールは平面圧縮強度的に安定性のなく、弱いものと
なる。Further, in the present invention, it is preferable that the trapezoidal shapes between the two adjacent liner layers 2 are formed in the same direction. As shown in FIG. 4, when the trapezoidal shapes are not formed in the same direction, that is, when the trapezoidal shapes between the adjacent liner layers 2 are formed in the opposite directions, two A large number of overlapping ribs 4 are formed. Therefore, in that part, a considerable sink mark is generated during extrusion molding, and there are many thin parts in the plastic corrugated board. Therefore, the plastic corrugated board shown in FIG. 4 is stable in terms of plane compression strength. No, it is weak.
【００１５】例えば、プラスチック段ボールを床面の養
生材として用いた場合、人がその上を歩き、また何らか
の物がその上に置かれることになる。その場合、人の足
裏面や物の載置面からプラスチック段ボールにかけられ
る押し圧力の方向としては、図３に示すように、足裏面
や物の載置面の中央付近では、表面のライナー層に対し
て垂直な方向に押し圧力がかけられるが、それらの側面
付近では、主に表面のライナー層に水平な面から４５°
から７５°の方向に押し圧力がかけられることになる。
従って、これらの押し圧力を、その方向から受け止めら
れるようにリブを配設すれば、平面圧縮強度の高いプラ
スチック段ボールを得られることとなる。よって、本発
明においては、上底Ｘ2とリブ３との外角の大きさを角
度θとしたとき、角度θが、０°＜θ＜９０°の関係を
満足することが好ましく、更に、角度θが、４５°≦θ
≦７５°の関係を満足することが好ましい。For example, when a plastic corrugated cardboard is used as a curing material for the floor surface, a person walks on it, or something is placed on it. In that case, as shown in FIG. 3, the direction of the pressing force applied to the plastic cardboard from the back of a person's foot or the placement surface of an object is as shown in FIG. The pressing force is applied in the vertical direction, but near their sides, 45 ° from the horizontal plane mainly on the surface liner layer.
The pressing force will be applied in the direction from 75 ° to 75 °.
Therefore, by disposing the ribs so that these pressing forces can be received from that direction, it is possible to obtain a plastic corrugated board having a high plane compressive strength. Therefore, in the present invention, it is preferable that the angle θ satisfies the relationship of 0 ° <θ <90 ° when the external angle between the upper bottom X 2 and the rib 3 is the angle θ. θ is 45 ° ≦ θ
It is preferable to satisfy the relationship of ≦ 75 °.
【００１６】[0016]
【発明の効果】以上説明したように、本発明によって、
隣り合う２枚のライナー層とリブとが形成する、複数本
のリブに垂直に交差する平面により切断した断面が台形
形状である（台形リブ）という構成を採用することによ
り、平面圧縮強度及び耐久性の向上を図ったプラスチッ
ク段ボールを提供することが出来る。As described above, according to the present invention,
By adopting a configuration in which two adjacent liner layers and ribs form a trapezoidal cross section cut by a plane perpendicular to a plurality of ribs (trapezoidal rib), planar compression strength and durability It is possible to provide a plastic corrugated board with improved properties.
【図１】本発明のプラスチック段ボールの一実施形態を
示す（ａ）斜視図、及び（ｂ）断面図である。FIG. 1A is a perspective view and FIG. 1B is a sectional view showing an embodiment of a plastic corrugated board of the present invention.
【図２】本発明のプラスチック段ボールの別の一実施形
態を示す断面図である。FIG. 2 is a cross-sectional view showing another embodiment of the plastic cardboard of the present invention.
【図３】プラスチック段ボールに加重がかけられたとき
の押し圧力のかかる方向を示す模式図である。FIG. 3 is a schematic diagram showing a direction in which a pressing force is applied when a load is applied to a plastic cardboard.
【図４】台形リブのプラスチック段ボールにおける悪い
例を示す断面図である。FIG. 4 is a sectional view showing a bad example of a trapezoidal rib in a plastic cardboard.
【図５】従来のプラスチック段ボールの一実施形態
（ａ）垂直リブ、（ｂ）三角形リブ、を示す断面図であ
る。FIG. 5 is a cross-sectional view showing (a) vertical ribs and (b) triangular ribs of one embodiment of a conventional plastic cardboard.
１…プラスチック段ボール、 ２…ライナー層、 ３…リブ、 ４…２本のリブの重なる部分、 ５…押し圧力、 ６…複数本のリブに垂直に交差する平面。 1 ... plastic cardboard, 2 ... liner layer, 3 ... ribs, 4 ... the overlapping part of two ribs, 5 ... Pressing force, 6 ... A plane perpendicular to a plurality of ribs.
Claims (6)
層の層間を支持する複数本のリブとを備えてなるプラス
チック段ボールであって、 隣り合う２枚の前記ライナー層と前記リブとが形成す
る、前記複数本のリブに垂直に交差する平面により切断
した断面が台形形状であるように形成されてなることを
特徴とするプラスチック段ボール。1. A plastic corrugated cardboard comprising at least two liner layers and a plurality of ribs for supporting the layers of the liner layer, wherein two adjacent liner layers and the ribs are formed. A plastic corrugated board characterized in that a cross section cut by a plane perpendicular to the plurality of ribs has a trapezoidal shape.
としたとき、 前記下底Ｘ1と、前記台形を構成する２本の前記リブと
が為す２つの内角の角度の差が２０°以内である請求項
１に記載のプラスチック段ボール。2. A long side of the trapezoid has a lower base X 1 and a short side has an upper base X 2.
The plastic corrugated board according to claim 1, wherein the difference between the angles of the two interior angles formed by the lower base X 1 and the two ribs forming the trapezoid is 20 ° or less.
角の大きさが等しい請求項２に記載のプラスチック段ボ
ール。3. The plastic corrugated board according to claim 2, wherein two inner angles formed by the lower bottom X 1 and the rib are equal in size.
を角度θとしたとき、 前記角度θが、０°＜θ＜９０°の関係を満足する請求
項１〜３のいずれか１項に記載のプラスチック段ボー
ル。4. The angle θ according to any one of claims 1 to 3, wherein an angle θ represents an external angle between the upper base X 2 and the rib, and the angle θ satisfies a relationship of 0 ° <θ <90 °. The plastic cardboard according to item 1.
を満足する請求項４に記載のプラスチック段ボール。5. The plastic corrugated board according to claim 4, wherein the angle θ satisfies a relationship of 45 ° ≦ θ ≦ 75 °.
れの前記台形形状が、同一の向きに形成された請求項１
〜５のいずれか１項に記載のプラスチック段ボール。6. The trapezoidal shape between two adjacent liner layers is formed in the same direction.
The plastic corrugated cardboard according to any one of items 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001192826A JP2003001735A (en) | 2001-06-26 | 2001-06-26 | Plastic corrugated board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001192826A JP2003001735A (en) | 2001-06-26 | 2001-06-26 | Plastic corrugated board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003001735A true JP2003001735A (en) | 2003-01-08 |
Family
ID=19031220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001192826A Pending JP2003001735A (en) | 2001-06-26 | 2001-06-26 | Plastic corrugated board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003001735A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005045139A1 (en) * | 2003-11-05 | 2005-05-19 | William Winter | Sacrificial shutters |
| KR20180060176A (en) * | 2016-11-28 | 2018-06-07 | 엘지디스플레이 주식회사 | Plastic substrate and Display device including the same |
| EP3643471A1 (en) | 2018-10-26 | 2020-04-29 | Morita Giken Inc. | Plastic laminated structure and method for producing the same |
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| JPH0276026A (en) * | 1988-09-13 | 1990-03-15 | Toshiba Corp | Multiwindow display device |
| JPH07125146A (en) * | 1993-11-01 | 1995-05-16 | Asahi Chem Ind Co Ltd | Composite board |
| JPH07290621A (en) * | 1994-04-25 | 1995-11-07 | Takeo Abe | Plastic corrugated board |
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2001
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|---|---|---|---|---|
| JPS5037591A (en) * | 1973-08-07 | 1975-04-08 | ||
| JPS62187725A (en) * | 1986-02-04 | 1987-08-17 | Daicel Chem Ind Ltd | Production of polycarbonate diol |
| JPH0276026A (en) * | 1988-09-13 | 1990-03-15 | Toshiba Corp | Multiwindow display device |
| JPH07125146A (en) * | 1993-11-01 | 1995-05-16 | Asahi Chem Ind Co Ltd | Composite board |
| JPH07290621A (en) * | 1994-04-25 | 1995-11-07 | Takeo Abe | Plastic corrugated board |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005045139A1 (en) * | 2003-11-05 | 2005-05-19 | William Winter | Sacrificial shutters |
| KR20180060176A (en) * | 2016-11-28 | 2018-06-07 | 엘지디스플레이 주식회사 | Plastic substrate and Display device including the same |
| KR102565140B1 (en) | 2016-11-28 | 2023-08-08 | 엘지디스플레이 주식회사 | Plastic substrate and Display device including the same |
| EP3643471A1 (en) | 2018-10-26 | 2020-04-29 | Morita Giken Inc. | Plastic laminated structure and method for producing the same |
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