JP2021155091A - Reinforcement paper with cut tape used on heavy duty paper packing bag - Google Patents

Reinforcement paper with cut tape used on heavy duty paper packing bag Download PDF

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JP2021155091A
JP2021155091A JP2020059219A JP2020059219A JP2021155091A JP 2021155091 A JP2021155091 A JP 2021155091A JP 2020059219 A JP2020059219 A JP 2020059219A JP 2020059219 A JP2020059219 A JP 2020059219A JP 2021155091 A JP2021155091 A JP 2021155091A
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paper
cut tape
reinforcing
base paper
reinforcement
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JP7228213B2 (en
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裕之 中川
Hiroyuki Nakagawa
裕之 中川
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ASAHI KAKOSHI KK
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Abstract

To provide reinforcement paper with cut tape that suppress paper dust from being generated when opening heavy duty paper packing bags and whose seal on a folded outer part is not easy to be unsealed even during transportation.SOLUTION: Reinforcement paper with cut tape is formed by attaching strip-shaped cut tape 2 to approximately rectangular reinforcement paper 1 so as to run in the longitudinal direction of the reinforcement paper 1. The reinforcement paper 1 is formed by laminating fourdrinier base paper 4 made by a fourdrinier paper machine and cylinder mold base paper 3 made by a cylinder mold paper machine. The mechanical direction of the cylinder mold base paper 3 coincides with the longitudinal direction of the reinforcement paper 1. The reinforcement paper with cut tape is formed by integrally laminating the cut tape 2, adhesives 5, the fourdrinier paper base paper 4 and the cylinder mold paper base paper 3 in this order. The adhesives 5 are preferably re-wet adhesives. The basis weight ratio between the fourdrinier paper base paper 4 and the cylinder mold paper base paper 3 is fourdrinier paper base paper 4: cylinder mold base paper 3=1: 0.6-1.SELECTED DRAWING: Figure 2

Description

本発明は、重包装紙袋に用いるカットテープ付き補強紙に関し、特に開封時に紙粉等が内容物に混入しにくいカットテープ付き補強紙に関するものである。 The present invention relates to a reinforcing paper with a cut tape used for a heavy wrapping paper bag, and more particularly to a reinforcing paper with a cut tape in which paper dust and the like are less likely to be mixed into the contents at the time of opening.

従来より、セメント、米、小麦粉、飼料又は石油化学品等の内容物を包装収納するのに、重包装紙袋が使用されている。重包装紙袋は、クラフト紙よりなる筒の底部開口部を折り畳み、折り畳み外表部にカットテープ付き補強紙で封緘して製造されている。そして、底部開口部と対向する上部開口部から内容物を充填した後、上部開口部を種々の手段により手で開封することが困難なように封止されて運搬されるものである。かかる重包装紙袋を開封するには、底部開口部の折り畳み外表部を封緘したカットテープ付き補強紙のカットテープのみを外方へ引き剥がすことにより、補強紙を切断して行う。 Traditionally, heavy wrapping paper bags have been used to wrap and store contents such as cement, rice, flour, feed or petrochemicals. The heavy-duty wrapping paper bag is manufactured by folding the opening at the bottom of a cylinder made of kraft paper and sealing the outer surface of the fold with reinforcing paper with a cut tape. Then, after filling the contents from the upper opening facing the bottom opening, the upper opening is sealed and transported so as to be difficult to open by hand by various means. In order to open such a heavy wrapping paper bag, the reinforcing paper is cut by peeling only the cut tape of the reinforcing paper with a cut tape that seals the folding outer surface of the bottom opening to the outside.

カットテープ付き補強紙は、略長方形の補強紙に帯形のカットテープが、補強紙の長手方向に走行するように添着されてなるものである。補強紙としては、クラフト紙が用いられている。また、カットテープとしては、比較的剛性のある合成樹脂製フィルムが用いられている。しかるに、カットテープを外方へ引き剥がして、補強紙を切断する際に、補強紙から紙粉が発生することがあった。そして、この紙粉が内容物中に混入するということがあった。 The reinforcing paper with a cut tape is formed by attaching a strip-shaped cut tape to a substantially rectangular reinforcing paper so as to run in the longitudinal direction of the reinforcing paper. Kraft paper is used as the reinforcing paper. Further, as the cut tape, a relatively rigid synthetic resin film is used. However, when the cut tape was peeled outward and the reinforcing paper was cut, paper dust was sometimes generated from the reinforcing paper. Then, this paper dust was sometimes mixed in the contents.

このため、補強紙として、プラスチックフィルムを用いることが提案されている（特許文献１）。プラスチックフィルムとしては、カットテープで切断しやすいように、補強紙の長手方向にのみ延伸されている、一軸延伸フィルムを用いることが提案されている。確かに、補強紙としてプラスチックフィルムを使用すれば紙粉の発生を防止しうるが、以下のような欠点があった。すなわち、一軸延伸フィルムは、補強紙の長手方向と直交する方向（補強紙の幅方向）の強度が低く、重包装紙袋を運搬している際に、幅方向に破断しやすく、折り畳み外表部の封緘が解けてしまうという欠点があった。 Therefore, it has been proposed to use a plastic film as the reinforcing paper (Patent Document 1). As the plastic film, it has been proposed to use a uniaxially stretched film that is stretched only in the longitudinal direction of the reinforcing paper so that it can be easily cut with a cut tape. Certainly, if a plastic film is used as the reinforcing paper, the generation of paper dust can be prevented, but there are the following drawbacks. That is, the uniaxially stretched film has low strength in the direction orthogonal to the longitudinal direction of the reinforcing paper (the width direction of the reinforcing paper), is easily broken in the width direction when the heavy wrapping paper bag is being transported, and is easily broken in the width direction. There was a drawback that the seal could be broken.

実開昭５７−１５４６４９号公報Jikkai Sho 57-154649

本発明の課題は、重包装紙袋を開封する際に、紙粉の発生を抑制すると共に、運搬時においても、折り畳み外表部の封緘が解けにくいカットテープ付き補強紙を提供することにある。 An object of the present invention is to provide a reinforcing paper with a cut tape, which suppresses the generation of paper dust when opening a heavy wrapping paper bag and makes it difficult to unseal the outer surface of the foldable paper even during transportation.

本発明は、特定の補強紙を採用することによって、上記課題を解決したものである。すなわち、本発明は、重包装紙袋に用いるカットテープ付き補強紙であって、補強紙１は略長方形であり、カットテープ２は帯形で補強紙１の長手方向に走行するように添着されてなり、補強紙１は、長網抄紙機で抄いた長網原紙４と円網抄紙機で抄いた円網原紙３とが貼合されてなり、円網原紙３の機械方向は補強紙１の長手方向と一致している、重包装紙袋に用いるカットテープ付き補強紙に関するものである。より具体的には、カットテープ２、接着剤５、長網原紙４及び円網原紙３の順に積層一体化された重包装紙袋に用いるカットテープ付き補強紙に関するものである。また、本発明は係るカットテープ付き補強紙を得るための補強紙１に関するものである。 The present invention solves the above problems by adopting a specific reinforcing paper. That is, the present invention is a reinforcing paper with a cut tape used for a heavy wrapping paper bag, the reinforcing paper 1 is substantially rectangular, and the cut tape 2 is strip-shaped and attached so as to run in the longitudinal direction of the reinforcing paper 1. The reinforcing paper 1 is formed by laminating the long net base paper 4 made by the long net paper machine and the circular net base paper 3 made by the circular net paper machine, and the machine direction of the circular net base paper 3 is that of the reinforcing paper 1. It relates to a reinforcing paper with a cut tape used for a heavy wrapping paper bag, which is consistent with the longitudinal direction. More specifically, the present invention relates to a reinforcing paper with a cut tape used for a heavy wrapping paper bag in which a cut tape 2, an adhesive 5, a long net base paper 4 and a circular net base paper 3 are laminated and integrated in this order. The present invention also relates to a reinforcing paper 1 for obtaining the reinforcing paper with a cut tape.

本発明に係る補強紙１は、長網原紙４と円網原紙３とが貼合されてなる略長方形のものである。補強紙１の坪量は６０〜１８０ｇ／ｍ2程度であり、好ましくは８０〜１５０ｇ／ｍ2程度であり、最も好ましくは１２０ｇ／ｍ2である。長網原紙４と円網原紙３の坪量比は、長網原紙４：円網原紙３＝１：０．５〜１．５であり、好ましくは１：０．６〜１である。長網原紙４の坪量比がこの範囲よりも高くなると、カットテープ２で補強紙１を切断する際に、補強紙１の長手方向に沿ってきれいに切断しにくくなる。逆に、長網原紙４の坪量比がこの範囲よりも低くなると、補強紙１の幅方向の強度が低下し、重包装紙袋を運搬している際に、幅方向に破断しやすくなる。なお、補強紙１は、長手方向の長さが４０〜５０ｃｍ程度で、幅方向の長さが８〜１０ｃｍ程度である。 The reinforcing paper 1 according to the present invention is a substantially rectangular shape formed by laminating a long net base paper 4 and a circular net base paper 3. The basis weight of the reinforcing sheet 1 is about 60~180g / m 2, preferably about 80 to 150 g / m 2, and most preferably from 120 g / m 2. The basis weight ratio between the long net base paper 4 and the circular net base paper 3 is the long net base paper 4: circular net base paper 3 = 1: 0.5 to 1.5, preferably 1: 0.6 to 1. If the basis weight ratio of the long net base paper 4 is higher than this range, it becomes difficult to cleanly cut the reinforcing paper 1 along the longitudinal direction of the reinforcing paper 1 when the reinforcing paper 1 is cut by the cut tape 2. On the contrary, when the basis weight ratio of the long net base paper 4 is lower than this range, the strength of the reinforcing paper 1 in the width direction is lowered, and it is easy to break in the width direction when the heavy wrapping paper bag is being transported. The reinforcing paper 1 has a length in the longitudinal direction of about 40 to 50 cm and a length in the width direction of about 8 to 10 cm.

長網原紙４は、長網抄紙機で抄造されたものである。長網抄紙機で抄造された長網原紙４は、円網原紙３に比べて、パルプ繊維が比較的無作為に配列されており、機械方向と幅方向との強度差が小さいものである。一方、円網原紙３は、円網抄紙機で抄造されたものである。円網抄紙機で抄造された円網原紙３は、長網原紙４に比べて、パルプ繊維が比較的機械方向に配列されており、機械方向の強度が高く、幅方向の強度が低いものである。そして、円網原紙３は、その機械方向が補強紙１の長手方向と一致している。 The long net base paper 4 is made by a long net paper machine. In the long net base paper 4 made by the long net paper machine, the pulp fibers are arranged relatively randomly as compared with the circular net base paper 3, and the strength difference between the machine direction and the width direction is small. On the other hand, the circular net base paper 3 is made by a circular net paper machine. Compared to the long net base paper 4, the circular net base paper 3 made by the circular net paper machine has pulp fibers arranged in a relatively mechanical direction, and has high strength in the mechanical direction and low strength in the width direction. be. The mechanical direction of the circular net base paper 3 coincides with the longitudinal direction of the reinforcing paper 1.

補強紙１には、一般的に、その全面に接着剤５が塗布されている。接着剤５としては、従来公知のものが採用され、たとえば、再湿型接着剤、感熱型接着剤又は感圧型接着剤等が採用される。本発明においては、特に再湿型接着剤を採用するのが好ましい。再湿型接着剤は水に浸すだけで接着できるため、合理的に重包装紙袋を製造することができる。接着剤５は、補強紙１の長網原紙４面の全面に塗布されているのが好ましい。また、接着剤５は、予め補強紙１に塗布されていてもよいし、重包装紙袋の製造時に塗布してもよい。 The reinforcing paper 1 is generally coated with an adhesive 5 on the entire surface thereof. As the adhesive 5, conventionally known ones are adopted, and for example, a re-wet type adhesive, a heat-sensitive adhesive, a pressure-sensitive adhesive, or the like is adopted. In the present invention, it is particularly preferable to use a re-wet type adhesive. Since the re-wet type adhesive can be adhered simply by immersing it in water, a heavy wrapping paper bag can be reasonably manufactured. The adhesive 5 is preferably applied to the entire surface of the four sides of the long net base paper of the reinforcing paper 1. Further, the adhesive 5 may be applied to the reinforcing paper 1 in advance, or may be applied at the time of manufacturing the heavy wrapping paper bag.

本発明に用いるカットテープ２は、略長方形の補強紙１の幅より短い幅を持つ帯形となっている。カットテープ２は、補強紙１の長手方向に走行するように添着されている。カットテープ２は、補強紙１の幅方向の任意の位置に添着されるが、一般的に補強紙１の幅方向の中央部に添着するのが好ましい。カットテープ２を添着するには、補強紙１に塗布されている接着剤５によって添着してもよいし、他の接着剤を用いて添着してもよい。また、カットテープ２の添着は、重包装紙袋の製造時に添着してもよいし、重包装紙袋の製造前に予め添着しておいてもよい。 The cut tape 2 used in the present invention has a strip shape having a width shorter than the width of the substantially rectangular reinforcing paper 1. The cut tape 2 is attached so as to run in the longitudinal direction of the reinforcing paper 1. The cut tape 2 is attached to an arbitrary position in the width direction of the reinforcing paper 1, but it is generally preferable to attach the cut tape 2 to the central portion in the width direction of the reinforcing paper 1. In order to attach the cut tape 2, it may be attached with the adhesive 5 applied to the reinforcing paper 1, or it may be attached with another adhesive. Further, the cut tape 2 may be attached at the time of manufacturing the heavy wrapping paper bag, or may be attached in advance before the manufacturing of the heavy wrapping paper bag.

本発明に係る補強紙１を用いて重包装紙袋を製造するには、たとえば、以下の方法により行う。まず、補強紙１にカットテープ２を添着する。補強紙１に接着剤５が塗布されている場合には、この接着剤５によってカットテープ２を添着すればよい。補強紙１に接着剤５が塗布されていない場合には、他の接着剤を用いて添着すればよい。なお、接着剤５が塗布されている場合であっても、他の接着剤によってカットテープ２を添着してもよい。次に、クラフト紙よりなる筒の底部開口部に設けられた折り畳み外表部に、カットテープ２が当接するようにして、カットテープ２及び補強紙１を接着し、底部開口部を封緘する。この接着は、補強紙１に接着剤５が塗布されている場合には、この接着剤５によって行えばよい。また、補強紙１に接着剤５が塗布されていない場合には、他の接着剤を用いて行えばよい。その後、底部開口部に対向している筒の上部開口部から、セメントや小麦粉等の内容物を充填した後、この上部開口部を封止して重包装紙袋を製造する。 To manufacture a heavy-duty wrapping paper bag using the reinforcing paper 1 according to the present invention, for example, the following method is used. First, the cut tape 2 is attached to the reinforcing paper 1. When the adhesive 5 is applied to the reinforcing paper 1, the cut tape 2 may be attached by the adhesive 5. When the adhesive 5 is not applied to the reinforcing paper 1, it may be attached using another adhesive. Even when the adhesive 5 is applied, the cut tape 2 may be attached with another adhesive. Next, the cut tape 2 and the reinforcing paper 1 are adhered to each other so that the cut tape 2 comes into contact with the folding outer surface provided at the bottom opening of the cylinder made of kraft paper, and the bottom opening is sealed. When the adhesive 5 is applied to the reinforcing paper 1, this adhesion may be performed by the adhesive 5. Further, when the adhesive 5 is not applied to the reinforcing paper 1, another adhesive may be used. Then, after filling the contents such as cement and flour from the upper opening of the cylinder facing the bottom opening, the upper opening is sealed to manufacture a heavy wrapping paper bag.

本発明に係る補強紙１を用いて得られた重包装紙袋は、カットテープ２をその長手方向外方へ引き剥がすと、補強紙１が切断され、底部開口部が開封される。この際、補強紙１中の円網原紙３は、長手方向にパルプ繊維が配列しているので、長手方向にきれいに切断され、紙粉が発生しにくいという効果を奏する。特に、補強紙１の表面に円網原紙３を配し、長手方向への切断性に優れたカットテープ２及び円網原紙３の両者で、長網原紙４を挟んだ形態にしておくと、長網原紙４もより長手方向にきれいに切断されやすくなり、紙粉の発生がより少なくなるという効果を奏する。また、補強紙１が円網原紙３のみではなく、長網原紙４が貼合されてなるものであるため、補強紙１の幅方向の強度も高く、重包装紙袋の運搬時に補強紙１が切断しにくく、折り畳み外表部の封緘が解けにくいという効果も奏する。 In the heavy wrapping paper bag obtained by using the reinforcing paper 1 according to the present invention, when the cut tape 2 is peeled outward in the longitudinal direction, the reinforcing paper 1 is cut and the bottom opening is opened. At this time, since the pulp fibers are arranged in the longitudinal direction of the circular net base paper 3 in the reinforcing paper 1, the pulp fibers are cut cleanly in the longitudinal direction, and paper dust is less likely to be generated. In particular, if the circular net base paper 3 is arranged on the surface of the reinforcing paper 1 and the long net base paper 4 is sandwiched between both the cut tape 2 and the circular net base paper 3 having excellent cutability in the longitudinal direction, The long net base paper 4 is also more easily cut in the longitudinal direction, and has the effect of reducing the generation of paper dust. Further, since the reinforcing paper 1 is formed by laminating not only the circular net base paper 3 but also the long net base paper 4, the strength of the reinforcing paper 1 in the width direction is high, and the reinforcing paper 1 is used when transporting the heavy wrapping paper bag. It is difficult to cut, and it also has the effect of making it difficult to unwrap the outer surface of the fold.

本発明の一例に係るカットテープ付き補強紙の裏面図である。It is a back view of the reinforcing paper with a cut tape which concerns on an example of this invention. 本発明の一例に係るカットテープ付き補強紙の縦断面図である。It is a vertical sectional view of the reinforcing paper with a cut tape which concerns on an example of this invention.

１ 補強紙
２ カットテープ
３ 円網原紙
４ 長網原紙
５ 接着剤 1 Reinforcing paper 2 Cut tape 3 Circular net base paper 4 Long net base paper 5 Adhesive

Claims (5)

重包装紙袋に用いるカットテープ付き補強紙であって、
前記補強紙は略長方形であり、前記カットテープは帯形で前記補強紙の長手方向に走行するように添着されてなり、
前記補強紙は、長網抄紙機で抄いた長網原紙と円網抄紙機で抄いた円網原紙とが貼合されてなり、
前記円網原紙の機械方向は前記補強紙の長手方向と一致している、重包装紙袋に用いるカットテープ付き補強紙。 Reinforcing paper with cut tape used for heavy wrapping paper bags
The reinforcing paper is substantially rectangular, and the cut tape is strip-shaped and attached so as to run in the longitudinal direction of the reinforcing paper.
The reinforcing paper is formed by laminating a long net base paper made by a long net paper machine and a circular net base paper made by a circular net paper machine.
A reinforcing paper with a cut tape used for a heavy wrapping paper bag, in which the mechanical direction of the circular net base paper coincides with the longitudinal direction of the reinforcing paper. カットテープ、接着剤、長網原紙及び円網原紙の順に積層一体化された請求項１記載の重包装紙袋に用いるカットテープ付き補強紙。 The reinforcing paper with a cut tape used for the heavy-duty wrapping paper bag according to claim 1, wherein the cut tape, the adhesive, the long net base paper, and the circular net base paper are laminated and integrated in this order. 接着剤が再湿型接着剤である請求項２記載の重包装紙袋に用いるカットテープ付き補強紙。 The reinforcing paper with a cut tape used for the heavy-duty wrapping paper bag according to claim 2, wherein the adhesive is a re-wet type adhesive. 請求項１乃至３のいずれか一項に記載のカットテープ付き補強紙を得るための補強紙。 Reinforcing paper for obtaining the reinforcing paper with a cut tape according to any one of claims 1 to 3. 請求項４記載の補強紙にカットテープを添着して、カットテープ付き補強紙を得る工程、
前記カットテープ付き補強紙を、クラフト紙よりなる筒の底部開口部に設けられた折り畳み外表部に、前記カットテープを当接させて接着して封緘する工程、
前記筒の前記底部開口部に対向する上部開口部から内容物を充填する工程及び
前記筒の前記上部開口部を封止する工程よりなる重包装紙袋の製造方法。 A step of attaching a cut tape to the reinforcing paper according to claim 4 to obtain a reinforcing paper with the cut tape.
A step of abutting and adhering the cut tape to the folding outer surface portion provided at the bottom opening of a cylinder made of kraft paper to seal the reinforcing paper with the cut tape.
A method for producing a heavy-duty wrapping paper bag, comprising a step of filling the contents from an upper opening facing the bottom opening of the cylinder and a step of sealing the upper opening of the cylinder.
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JP2018059219A (en) * 2016-10-03 2018-04-12 大王製紙株式会社 Kraft paper for reinforcing paper and method of manufacturing kraft paper for reinforcing paper

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JP2009218238A (en) * 2008-03-06 2009-09-24 Japan Vilene Co Ltd Separator for electrochemical element and method of manufacturing the same, and aluminum electrolytic capacitor or electric double layer capacitor using the same
JP2014205934A (en) * 2013-04-12 2014-10-30 王子ホールディングス株式会社 Packaging sheet for double bag
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