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JP2019058588A - Household paper roll paper tube - Google Patents

Household paper roll paper tube Download PDF

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JP2019058588A
JP2019058588A JP2017187607A JP2017187607A JP2019058588A JP 2019058588 A JP2019058588 A JP 2019058588A JP 2017187607 A JP2017187607 A JP 2017187607A JP 2017187607 A JP2017187607 A JP 2017187607A JP 2019058588 A JP2019058588 A JP 2019058588A
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paper
paper tube
tube
base
roll
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JP7078370B2 (en
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美喜 荒木
Miki Araki
美喜 荒木
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Daio Paper Corp
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Abstract

【課題】低坪量でサーフェイスワインダーに適した家庭紙ロール用紙管を提供する。【解決手段】帯状の家庭紙が巻かれる家庭紙ロール用紙管であって、重なり代を有してスパイラル状に巻回された外側紙管原紙32とスパイラル状に巻回された内側紙管原紙31とが、相互に位置をずらして重畳され接着層によって接着されており、外側紙管原紙と内側紙管原紙の坪量が145〜155g/m2であり、前記外側紙管原紙の幅が88〜98mmであり重なり代が8〜18mmであり、かつ、紙管幅95〜120mmで外側紙管が周回するように構成されている、家庭紙ロール用紙管10。【選択図】図1PROBLEM TO BE SOLVED: To provide a household paper roll paper tube having a low basis weight and suitable for a surface winder. SOLUTION: This is a household paper roll paper tube around which a strip-shaped household paper is wound, and has an outer paper tube base paper 32 wound in a spiral shape with an overlap margin and an inner paper tube base paper wound in a spiral shape. 31 is superimposed on each other at different positions and bonded by an adhesive layer, the basis weight of the outer paper tube base paper and the inner paper tube base paper is 145 to 155 g / m2, and the width of the outer paper tube base paper is 88. A household paper roll paper tube 10 having a paper tube width of about 98 mm, an overlapping allowance of 8 to 18 mm, and a paper tube width of 95 to 120 mm so that the outer paper tube circulates. [Selection diagram] Fig. 1

Description

本発明は、家庭紙ロール用紙管に関する。   The present invention relates to household paper roll paper tubes.

紙管に帯状のキッチンペーパーやトイレットペーパー等の家庭紙を巻いてロール状のトイレットロールやキッチンペーパーロール等の製品にするには、ワインダーが用いられる。家庭紙ロールを製造するためのワインダーには、紙管内に挿入したシャフトによって紙管を回転させて紙を巻き取るセンターワイディングと、巻き取りロールやドラムロールとも称されるサーフェイスロールとエア抜きなどを行うライダーロールとによって外周面側から回転力を与えて紙管に紙を巻き付けるサーフェイスワインダーがあり、近年では、生産性の高いサーフェイスワインダーが主流となっている。   A winder is used to wind household paper such as a strip of kitchen paper or toilet paper around a paper tube to make a product such as a roll-like toilet roll or a kitchen paper roll. The winder for producing home paper rolls includes center winding, which rotates the paper tube by a shaft inserted into the paper tube to wind the paper, surface roll, which is also referred to as a take-up roll or drum roll, and air removal. There is a surface winder which winds a paper on a paper tube by giving a rotational force from the outer peripheral side by a rider roll to perform a, and in recent years, a highly productive surface winder has become mainstream.

しかし、サーフェイスワインダーでは、紙管にシャフトの入るセンターワインディングと異なる特性が紙管に要求される。   However, in the surface winder, the paper core is required to have different characteristics from the center winding in which the shaft is inserted into the paper core.

すなわち、サーフェイスワインダーでは、2本のロール間を通過しながら紙をピックアップする際に、高いグリップ力が必要となる。また、紙管を紙管外径より2.5〜3mm程度狭いクリアランスを通過させる。そして、紙をピックアップしてから巻き取りが開始されると、紙管の周速は瞬間的に700m/分程度まで急加速される。   That is, the surface winder requires high grip when picking up paper while passing between two rolls. Further, the paper tube is passed through a clearance narrower by about 2.5 to 3 mm than the paper tube outer diameter. Then, when the winding is started after picking up the paper, the circumferential speed of the paper tube is instantaneously rapidly accelerated to about 700 m / min.

したがって、紙管にはクリアランスを通過する際に若干の潰れる弾性が必要であるとともに、巻き取り時に断面の真円度が高い状態に復元されることが要求される。クリアランス通過時に潰れがたい場合には、紙のピックアップができなくなり、また、潰れた状態のまま、巻き取りが開始されるとワインダー内で紙管の踊りやはねが生じて巻き取りができなくなる。   Therefore, the paper tube needs to have some crushing elasticity when passing through the clearance, and is required to be restored to a state in which the roundness of the cross section is high at the time of winding. If it is difficult to crush when passing through the clearance, the paper can not be picked up, and if the winding is started while the crush is in a crushed state, the paper tube dances and splashes in the winder and the winding can not be performed. .

他方で、家庭紙ロールの製造は、一般的には、製品幅よりも長い長尺の紙管を形成し、この長尺の紙管に幅広のペーパーを巻いてログと称される製品幅よりも幅広の中間体を形成し、その後にこのログをログカッター又はログソーと呼ばれる裁断手段にて製品幅に裁断して製品とする。したがって、紙管の強度が弱いと所定寸法に裁断する際、カット面が潰れて不良品となる。   On the other hand, in the production of household paper rolls, generally, a long paper tube longer than the product width is formed, and a wide paper is wound around the long paper tube to make the product width more than a product width called log. Also, a wide intermediate is formed, and then this log is cut into a product width by a cutting means called log cutter or log saw to make a product. Therefore, when the strength of the paper tube is weak, when the sheet is cut into a predetermined size, the cut surface is crushed and becomes a defective product.

ところで、紙管は、巻かれた紙を使用した後には、通常は廃棄されるものであるため、家庭紙ロールにおける紙管の原料やコストは低いほうが望ましい。紙管の原料やコスト低減の手段の一つに紙管原紙の坪量を低下させることが挙げられるが、坪量の低下は原紙の強度の低下につながるため、単に坪量を低下させるだけでは、サーフェイスワインダーで使用可能な紙管の特性を確保することが非常に困難となる。   By the way, since the paper tube is usually discarded after use of the rolled paper, it is desirable that the material and cost of the paper tube in the home paper roll be as low as possible. Although reducing the basis weight of paper tube base paper is mentioned as one of the raw materials of paper tube and means of cost reduction, since the reduction of basis weight leads to the fall of the strength of the base paper, simply reducing the basis weight It becomes very difficult to secure the properties of the paper tube that can be used with the surface winder.

特開2011−131464号公報JP 2011-131464 A 特開2013−070815号公報JP, 2013-070815, A 特開2014−193214号公報JP, 2014-193214, A 特開2016−064879号公報JP, 2016-064879, A 特許第5590205号Patent No. 5590205

そこで、本発明の主たる課題は、坪量が低く、しかもサーフェイスワインダーの適性がより向上された家庭紙ロール用紙管を提供することにある。   Therefore, a main object of the present invention is to provide a household paper roll paper tube having a low basis weight and further improved the suitability of the surface winder.

上記課題を解決した本発明は次記のとおりである   The present invention which solved the above-mentioned subject is as follows.

〔請求項1記載の発明〕
帯状の家庭紙が巻かれる家庭紙ロール用紙管であって、
重なり代を有してスパイラル状に巻回された外側紙管原紙とスパイラル状に巻回された内側紙管原紙とが、相互に位置をずらして重畳され接着層によって接着されており、
外側紙管原紙と内側紙管原紙の坪量が145〜155g/m2であり、
前記外側紙管原紙の幅が88〜98mmであるとともに重なり代が8〜18mmであり、かつ、紙管幅95〜120mmで外側紙管が周回するように構成されている、
ことを特徴とする家庭紙ロール用紙管。
[Invention of Claim 1]
A home paper roll paper tube on which a band of home paper is wound,
The spirally wound outer paper pipe base paper having an overlapping margin and the spirally wound inner paper pipe base paper are overlapped with each other in a mutually offset manner, and are adhered by an adhesive layer,
The basis weight of the outer side paperboard base paper and the inner side paper base paper is 145 to 155 g / m 2 ,
The width of the outer paper tube base paper is 88 to 98 mm, the overlap margin is 8 to 18 mm, and the outer paper tube is configured to circulate at a paper tube width of 95 to 120 mm.
Household paper roll paper tube characterized by.

〔請求項2記載の発明〕
25%圧縮時における圧縮強度が13.0〜22.5Nであり、50%圧縮時における圧縮強度が20.0〜24.5Nである請求項1記載の家庭紙ロール用紙管。
[Invention according to claim 2]
The household paper roll paper tube according to claim 1, wherein the compression strength at 25% compression is 13.0 to 22.5 N, and the compression strength at 50% compression is 20.0 to 24.5 N.

〔請求項3記載の発明〕
外側紙管原紙及び内側紙管原紙が非片艶紙である請求項1又は2記載の家庭紙ロール用紙管。
[Invention of Claim 3]
The home paper roll paper pipe according to claim 1 or 2, wherein the outer paper base paper and the inner paper base paper are non-glossy paper.

以上のとおり本発明によれば、坪量が低く、しかもサーフェイスワインダーの適性がより向上された家庭紙ロール用紙管が提供される。   As described above, according to the present invention, there is provided a home paper roll paper tube having a low basis weight and further improved the suitability of the surface winder.

本発明の実施形態に係る家庭紙ロール用紙管の斜視図である。It is a perspective view of a home paper roll paper pipe concerning an embodiment of the present invention. 本発明の実施形態に係る家庭紙ロール用紙管の断面図である。It is a sectional view of a home paper roll paper pipe concerning an embodiment of the present invention. 本発明に係る耐圧強度の測定方法を説明するための図である。It is a figure for demonstrating the measuring method of the pressure resistance which concerns on this invention. 本発明に係る家庭紙ロール用紙管の製造方法を説明するための図である。It is a figure for demonstrating the manufacturing method of the household paper roll paper pipe which concerns on this invention. 紙管の製造方法を説明するための他の図である。It is another figure for demonstrating the manufacturing method of a paper tube.

本発明の実施形態を図1〜5を参照しながら以下に説明する。但し、本発明は、この実施形態に限られない。   Embodiments of the present invention are described below with reference to FIGS. However, the present invention is not limited to this embodiment.

本実施形態の家庭紙ロール用紙管10は、帯状のトイレットペーパー、キッチンペーパー、ティシュペーパー又は紙タオル等の家庭紙が巻かれてロール状の製品を構成するためのものであり、その外径は、φ35〜44mmである。   The household paper roll paper tube 10 of the present embodiment is for winding household paper such as band-like toilet paper, kitchen paper, tissue paper or paper towel to constitute a roll-like product, and the outer diameter thereof is , Φ 35-44 mm.

この家庭紙ロール用紙管(以下、単に紙管ともいう)10は、スパイラル状に巻回された外側紙管原紙32とスパイラル状に巻回された内側紙管原紙31とが相互に位置ずらして重畳され接着剤による接着層22によって接着されているいわゆるスパイラル紙管である。   In this household paper roll paper pipe (hereinafter, also simply referred to as a paper pipe) 10, the spirally wound outer paper pipe base paper 32 and the spirally wound inner paper pipe base paper 31 are mutually offset. It is a so-called spiral paper tube which is superposed and adhered by an adhesive layer 22 with an adhesive.

本実施形態に係る外側紙管原紙32及び内側紙管原紙31の坪量がともに、145〜155g/m2である。従来の一般的なサーフェイスワインダーに用いられる家庭紙ロール用紙管に用いられる紙管原紙の坪量は170〜180g/m2であり、本実施形態に係る外側紙管原紙32及び内側紙管原紙31の坪量145〜155g/m2は、かなり低い坪量である。まず、低坪量であることから繊維原料を少なくすることができ、コストも安くすることができる。そして、本実施形態の紙管10は、低坪量でありながら下記構成によって従来紙管よりもサーフェイスワインダーにおける適性が高くなっている。なお、145g/m2未満となると強度を発現させるのが困難となり、155g/m2ではコスト安を達成し難くなる。また、内側紙管原紙31と外側紙管原紙32の坪量の差が10g/m2以内であり成形ベルトとマンドレルシャフトを用いた一般的な製法において皺が発生しがたい。好ましくは、内側紙管原紙31と外側紙管原紙32の坪量の差は5g/m2、特には2g/m2とするのが望ましい。最も好ましいのは同一である。また、本発明に係る坪量とは、JIS P 8124(1998)の坪量測定方法によるものである。紙管原紙31,32の坪量は、紙管製造前のものを測定してもよいが、次のように測定しても紙管前の紙管原紙の坪量と同等となる。家庭紙ロールの家庭紙をすべて巻き出して紙管を取り出した後、この紙管を、水を満たしたビーカー中に沈めて24時間浸漬して接着糊を溶解させて、内側紙管原紙と外側紙管原紙を分離する。次いで、内側紙管原紙と外側紙管原紙の各々を105℃で12時間乾燥させる。さらに、内側紙管原紙と外側紙管原紙の各々を、恒温恒湿室23℃50%環境下に24時間保管する。次いで、内側紙管原紙と外側紙管原紙の各々の質量を測定する(小数点3位まで)。内側紙管原紙と外側紙管原紙の各々を、平面状として、幅および長さを測定する。上記質量と幅及び長さから次式にて坪量を算出する。紙管原紙の坪量(g/m2)=紙管原紙の質量(g)÷〔紙管原紙の長さ(m)×紙管原紙の幅(m)〕。5ロールの紙管について、各々計測した内側紙管原紙と外側紙管原紙の坪量5点を平均して、各々の内側紙管原紙と外側紙管原紙の坪量とする。 The basis weights of both the outer paper core base paper 32 and the inner paper core paper base 31 according to the present embodiment are 145 to 155 g / m 2 . The basis weight of the paper core base paper used for the home paper roll paper pipe used for the conventional general surface winder is 170 to 180 g / m 2 , and the outer side paper base material 32 and the inner side paper base material 31 according to the present embodiment. The basis weight of 145 to 155 g / m 2 is a fairly low basis weight. First, the low basis weight enables the fiber raw material to be reduced and the cost to be reduced. And the paper tube 10 of this embodiment is high in the suitability in a surface winder rather than the conventional paper tube by the following structure although it is low basic weight. In addition, when it becomes less than 145 g / m < 2 >, it will become difficult to express intensity | strength, and it will become difficult to achieve cost reduction in 155 g / m < 2 >. Further, the difference in basis weight between the inner side paper tube base paper 31 and the outer side paper tube base paper 32 is within 10 g / m 2 , and wrinkles hardly occur in a general manufacturing method using a forming belt and a mandrel shaft. Preferably, the difference in basis weight between the inner paper core 31 and the outer paper base 32 is 5 g / m 2 , in particular 2 g / m 2 . Most preferred are identical. Moreover, the basis weight which concerns on this invention is based on the basis weight measuring method of JISP 8124 (1998). The basis weight of the paper tube base papers 31 and 32 may be measured before production of the paper tube, but it is equivalent to the basis weight of the paper tube base paper before the paper tube even if it is measured as follows. After unrolling all the home paper from the home paper roll and taking out the paper tube, this paper tube is immersed in a beaker filled with water and immersed for 24 hours to dissolve the adhesive paste, and the inner paper tube base paper and the outer side Separate the paper tube base paper. Next, each of the inner and outer paper tube base papers is dried at 105 ° C. for 12 hours. Further, each of the inner and outer paper core base papers is stored for 24 hours in a constant temperature and humidity chamber at 23 ° C. and 50% environment. Next, the mass of each of the inner and outer paper core base papers is measured (up to the third decimal place). The width and length are measured with each of the inner and outer paper-tubstocks as a flat surface. The basis weight is calculated from the above mass, width and length by the following equation. Basic weight of paper tube base paper (g / m 2 ) = mass of paper tube base paper (g) ÷ length of paper tube base paper (m) × width of paper tube base paper (m)). The basis weight of each of the inner paperboard and outer paperboard base paper measured for each of the 5 rolls of paperboard is calculated as the basis weight for each of the inner paperboard base paper and the outer paperboard base paper.

本実施形態の紙管10は、外側紙管原紙32が重なり代11を有してスパイラル状に巻回されており、特にその外側紙管原紙32の幅L1が88〜98mmであるとともに重なり代11の幅L2が8〜18mmとなっている。重なり代11のより好ましい幅L2は、10〜15mmである。なお、重なり代11の部分においては外側紙管原紙同士が接着層21によって接着されている。ここで、従来の紙管においても外側紙管原紙が重なり代を有しているものがあるが、一般的には5mm程度である。本実施形態の紙管では外側紙管原紙の重なり代が8〜18mmと幅広になっている。重なり代が8mm以上となると、サーフェイスワインダーでの操業が非常に安定する。この理由は、まず、サーフェイスワインダーでは、紙を巻き始める初期段階においてはサーフェイスロールによって紙管及び巻かれて紙が回転させられその後すぐにその巻き始められたロールにライダーロールが接触する。すなわち、紙管の回転発生からライダーロールによって紙が巻かれ始めたロールの抑えが開始されるまでの間に時間差がある。そして、本実施形態の紙管10では、外側紙管原紙32の重なり代11は原紙同士が重ねっているため外周面側にやや凸となる。つまり、本実施形態の紙管は、外周面に8〜18mm幅の凸部11がスパイラル状に形成される。そして、8mm以上の幅の凸部11が外周面にあると、特に、紙を巻き始める段階において、サーフェイスロールと紙が紙管に巻かれ始めたロールとの間の接触範囲が高まるため、ライダーロールが当たるまでの間の紙が紙管に巻かれ始めたロールの踊りやブレが生じにくくなる。また、紙管に紙をピックアップする際に凸部が広いことによって、ピックアップのミスが少なくなり操業が安定する。   In the paper tube 10 of the present embodiment, the outer paper tube base paper 32 is spirally wound with the overlapping space 11 and, in particular, the width L1 of the outer paper web base paper 32 is 88 to 98 mm. The width L2 of 11 is 8 to 18 mm. A more preferable width L2 of the overlap margin 11 is 10 to 15 mm. In the portion of the overlap margin 11, the outer side paper pipe base papers are adhered by the adhesive layer 21. Here, there is also a conventional paper tube having an outer paper tube base paper overlapping and having an allowance, but in general, it is about 5 mm. In the paper tube of the present embodiment, the overlapping margin of the outer paper tube base paper is as wide as 8 to 18 mm. When the overlap margin is 8 mm or more, the operation on the surface winder becomes very stable. The reason for this is that, first, in the surface winder, in the initial stage of starting to wind the paper, the paper roll and the paper are rotated by the surface roll, and the rider roll contacts the wound roll immediately thereafter. That is, there is a time difference between the occurrence of the rotation of the paper tube and the start of the restraining of the roll on which the paper starts to be wound by the rider roll. Then, in the paper tube 10 of the present embodiment, the overlap margin 11 of the outer paper tube base paper 32 is slightly convex on the outer peripheral surface side, since the paper sheets overlap each other. That is, in the paper tube of the present embodiment, convex portions 11 each having a width of 8 to 18 mm are spirally formed on the outer peripheral surface. And, when the convex portion 11 having a width of 8 mm or more is on the outer peripheral surface, the contact range between the surface roll and the roll where the paper starts to be wound on the paper tube is increased particularly at the stage of starting to wind the paper. It is less likely that the roll dances or shakes that the paper has been wound around the paper tube until the roll strikes. In addition, when the paper is picked up on the paper tube, the convex portion is wide, so that the number of pickup errors is reduced and the operation is stabilized.

また、重なり代11の幅が8mm以上と従来製品における重なり代よりわずか3mm幅広になることで紙管の強度が各段に高まる。その結果、上記のとおり低い坪量とすることができる。反対に8mmを下回る重なり代の幅では、145〜155g/m2の紙管原紙とするのが困難となる。また、重なり代の幅が18mmを超える場合には、紙管原紙を低い坪量としても重なり代によってコストの削減が相殺されるため18mmを超えるのは望ましくない。また、18mmを超えるとマンドレルシャフトを用いた一般的な製造方法の場合に皺が入りやすく製造が難しくなる。さらに。18mmを超えるとライダーロールによる空気排出が不十分となるエア噛みが発生するおそれが高まる。ライダーロールは、紙管に紙が巻かれ始めたロールに接触して、さらに紙を巻いていく際に既に巻かれている紙とこれから巻く紙との間の隙間に空気が入らないように抑えるように作用するため、凸部の幅が18mmを超えて幅広となる空気排出が十分とならずエア噛みが発生する恐れが高まるのである。エア噛みが発生した際には、安定したロールの回転が難しくなるため操業安定性が低下する。 In addition, the strength of the paper tube is increased in each step by making the width of the overlapping margin 11 8 mm or more and only 3 mm wider than the overlapping margin in the conventional product. As a result, the basis weight can be reduced as described above. On the other hand, if the overlap width is less than 8 mm, it will be difficult to obtain a paper tube base of 145 to 155 g / m 2 . If the width of the overlap exceeds 18 mm, it is not desirable to exceed 18 mm because the cost reduction is offset by the overlap even if the paper base material is made to have a low basis weight. Moreover, when it exceeds 18 mm, in the case of the general manufacturing method using a mandrel shaft, it becomes easy to get wrinkles and manufacture becomes difficult. further. If it exceeds 18 mm, there is a high possibility that air biting may occur, which results in insufficient air discharge by the rider roll. The rider roll is in contact with the roll that the paper has begun to be wound on the paper tube and prevents air from entering the gap between the paper that is already wound and the paper that is to be wound as the paper is further wound. As a result, since the width of the protrusion exceeds 18 mm and the air is not wide enough, the possibility of air entrapment is increased. When air bites occur, stable roll rotation becomes difficult, which lowers operation stability.

さらに、本実施形態の紙管では、坪量145〜155g/m2で外側紙管原紙32の重なり代の幅を8〜18mmとすることで紙管の弾性と強度に優れたものとなり、紙管にキッチンペーパーやトイレットペーパーを巻いた後にログソー等で裁断する際に紙管の潰れが発生し難くなる。 Furthermore, in the paper tube of the present embodiment, by setting the width of the overlapping margin of the outer paper tube base paper 32 to 8 to 18 mm at a basis weight of 145 to 155 g / m 2 , the elasticity and strength of the paper tube become excellent When the kitchen paper or toilet paper is wound on the pipe and cut with a log saw or the like, the paper pipe is less likely to be crushed.

他方、本実施形態における外側紙管原紙32の幅は88〜98mmである。98mmを超えると重なり代の間隔が離れすぎとなり強度等の向上が十分に発現しない場合がある。また、88mmを下回ると坪量を低下させた意義が相殺されるおそれが高まる。   On the other hand, the width of the outer paper tube base paper 32 in the present embodiment is 88 to 98 mm. If it exceeds 98 mm, the overlapping intervals may be too far apart, and the improvement of the strength and the like may not be sufficiently expressed. Moreover, if it is less than 88 mm, the possibility that the significance of reducing the basis weight will be offset will increase.

ここで本実施形態に紙管では、内側紙管原紙31についても重なり代を形成してもよいが、内側紙管原紙31は紙管の内周面を構成することになるが、この内周面が製造時にマンドレルシャフトに直接に巻きつけられ部分であるため段差がないほうが望ましい。このため本実施形態の紙管の好ましい形態は、内側紙管原紙については重なり代がない形態である。但し、強度の発現の点から、内側紙管原紙31の縁は隙間なく接合しているのが望ましい。   Here, in the paper tube according to the present embodiment, the overlapping margin may be formed for the inner side paper tube base paper 31 as well, but the inner side paper tube base paper 31 constitutes the inner peripheral surface of the paper tube. It is desirable that there be no step because the surface is a portion that is directly wound around the mandrel shaft during manufacture. For this reason, the preferable form of the paper tube of this embodiment is a form without an overlap margin about inner side paper tube base paper. However, from the viewpoint of the development of strength, it is desirable that the edges of the inner side paper stock 31 be joined without any gap.

外側紙管原紙32と内側紙管原紙31との位置のずれについては、内側紙管原紙31の幅方向の間、特に幅方向の中央部に外側紙管原紙31の重なり代11が位置するようにするのがよい。これは内側紙管原紙31と外側紙管原紙32へのマンドレルシャフト対する巻き付けの角度を同程度にすればよい。このようにすると少なくとも外側紙管原紙32の重なり代11のある部分は三層積層構造となるため、凸部による紙管の弾性及び強度の発現がサーフェイスロールの適性により優れたものとなる。なお、内側紙管原紙31の幅は、特に限定されないが80mmを基準に、外側紙管原紙32の幅及び重なり代の幅と、重なり代部分が内側紙管原紙31の幅の中央に位置されることを考慮して適宜に定めればよい。   With regard to the positional deviation between the outer paper core base paper 32 and the inner paper core base paper 31, the overlap margin 11 of the outer paper core base paper 31 is positioned between the width direction of the inner paper core base paper 31, especially in the central part in the width direction. It is good to This can be achieved by making the angles of winding the mandrel shaft on the inner paper core sheet 31 and the outer paper core sheet 32 equal. In this way, at least the portion of the outer paper tube base paper 32 where the overlap margin 11 is formed has a three-layer laminated structure, so that the elasticity and strength of the paper tube due to the convex portions become better by the surface roll aptitude. In addition, the width of the inner paper tube base paper 31 is not particularly limited, but the width of the outer paper tube base paper 32 and the width of the overlapping margin and the overlapping margin portion are positioned at the center of the width of the inner paper tube base paper 31 based on 80 mm. It may be determined appropriately in consideration of the

本実施形態に係る紙管10の接着層21,22に係る接着剤は、特に限定されない。公知の紙管用のものを用いることができる。アクリル系接着剤、ホットメルト接着剤、澱粉糊、PVA(ポリビニルアルコール)等が例示できる。   Adhesives related to the adhesive layers 21 and 22 of the paper tube 10 according to the present embodiment are not particularly limited. A well-known paper tube can be used. Acrylic adhesives, hot melt adhesives, starch paste, PVA (polyvinyl alcohol) and the like can be exemplified.

本実施形態に係る紙管は、幅95〜120mmで外側紙管原紙32が周回するようにする。このようにすると95〜120mmで三枚重ねとなる凸部11が周回して配置され、特にサーフェイスワインダーでのグリップ時の潰れに対する強度及び弾性において適性の高いものとなる。また、95〜120mmで凸部が周回するように配置されている場合には、ログソーでの裁断の際に紙管の潰れが発生し難くなる。   In the paper tube according to the present embodiment, the outer paperboard base paper 32 circulates with a width of 95 to 120 mm. In this way, the convex portion 11 which is a three-layer stack of 95 to 120 mm is circumferentially disposed, and in particular, the strength and elasticity against crushing at the time of gripping with the surface winder become high. In addition, when the convex portion is disposed so as to rotate at 95 to 120 mm, crushing of the paper tube is less likely to occur at the time of cutting with the log saw.

ここで、本実施形態の紙管10における具体的な強度は、25%圧縮時における圧縮強度が13.0〜22.5Nであり、50%圧縮時における圧縮強度が20.0〜24.5Nであるが望ましい。ここで、圧縮強度は、特に図3に示すように、紙管10を水平で硬質な台40の上に孔が水平方向に向くように横向き置き、端子51をφ2cmとしたプッシュプルゲージ50(株式会社イマダ社製の型番:Z2−20又はその相当品)を用いて、紙管中央上から垂直方向に押した際の、25%圧縮時と50%圧縮時の抵抗力をそれぞれ測定した値である。なお、測定は、家庭紙ロールから家庭紙を取り除いて紙管だけとして測定してもよいし、家庭紙巻き付け前の紙管(後述する長尺のスパイラル紙管30等)を測定してもよい。但し、家庭紙ロールから家庭紙を取り除いた紙管を測定する場合には、潰れがないものとする。また、家庭紙ロールから家庭紙を取り除いて紙管だけとする場合には、ピックアップ糊によって1〜2層の家庭紙が付着している状態であってもよい。さらに、紙管が幅114mmを超えるものの場合には、114mm幅に潰れないように裁断して測定する。95〜114mmの範囲では、そのまま測定する。25%圧縮時における耐圧強度が13.0〜22.5Nの範囲にあり、50%圧縮時における圧縮強度が20.0〜24.5Nの範囲にあれば、サーフェイスワインダーにて2本のロール間を通過しながら紙をピックアップする際に高いグリップ力が加わったり、紙をピックアップしてから巻き取りが開始される際の急加速の際においても紙管がねじれることがなくものと評価でき、また、紙管10を紙管外径より2.5〜3mm程度狭いクリアランスを通過する際において、適切な潰れる量でしかも巻き取り時までに復元されるものと評価できる。さらに、ログソーで裁断する際においても、家庭紙ロール及び紙管が極めて潰れ難いものと評価できる。特に、50%圧縮時における圧縮強度を20.0〜24.5Nであると、このログソーで極めて潰れ難いものと評価できる。ログソーでログを製品幅に裁断する際には、カッターの刃により、ログが瞬間的に紙管が潰れるほど圧迫されることがあり、その際の紙管の潰れが元の紙管径に対し半分ほどになる場合がある。したがって、その際の変形が大きくなり過ぎないように、50%圧縮時における圧縮強度を20.0〜24.5Nとするのが特に望ましい。   Here, the specific strength of the paper tube 10 of the present embodiment is 13.0 to 22.5 N in 25% compression and 20.0 to 24.5 N in 50% compression. But desirable. Here, as shown in FIG. 3 in particular, the compressive strength is set so that the paper tube 10 is horizontally oriented horizontally on the rigid table 40 so that the holes are directed horizontally, and the push-pull gauges 50 A value obtained by measuring the resistance at 25% compression and at 50% compression when pressed vertically from above the center of a paper tube, using a model number: Z2-20 manufactured by IMADA CO., LTD. It is. In addition, a measurement may remove a household paper from a household paper roll, and may measure only as a paper tube, and may measure a paper tube (long spiral paper tube 30 grade | etc., Mentioned later) before household paper winding. . However, when measuring the paper tube which removed household paper from household paper roll, it shall not be crushed. Moreover, when household paper is removed from a household paper roll and it is set as only a paper pipe, it may be in a state where one or two layers of household paper are adhered by pickup glue. Furthermore, when the paper tube exceeds 114 mm in width, it is cut and measured so as not to collapse to 114 mm in width. In the range of 95-114 mm, it measures as it is. If the compressive strength at 25% compression is in the range of 13.0 to 22.5 N, and the compressive strength at 50% compression is in the range of 20.0 to 24.5 N, then the surface winder may be used between two rolls. It can be evaluated that the paper tube does not get twisted even in the case of rapid acceleration when picking up the paper and picking up the paper after picking up the paper while picking up the paper, When passing the paper tube 10 through a clearance narrower by about 2.5 to 3 mm than the outer diameter of the paper tube, it can be evaluated that the paper tube 10 is restored by an appropriate amount of crushing and at the time of winding. Furthermore, even when cutting with a log saw, it can be evaluated that household paper rolls and paper tubes are extremely difficult to crush. In particular, when the compression strength at 50% compression is 20.0 to 24.5 N, it can be evaluated that this log saw is extremely unlikely to be crushed. When cutting a log into a product width with a log saw, the cutter blade may press the log instantaneously so that the paper pipe may be crushed, and the crushing of the paper pipe at that time is as opposed to the original paper pipe diameter. It may be about half. Therefore, it is particularly desirable to set the compression strength at 50% compression to 20.0 to 24.5 N so that deformation at that time is not too large.

他方で、上記紙管10の強度は、繊維密度や平滑度、紙力剤の使用によっても調整できるが、次のような紙管原紙を用いるのが望ましい。   On the other hand, the strength of the paper tube 10 can be adjusted also by the fiber density and smoothness, and the use of a paper strength agent, but it is preferable to use a paper tube base paper as described below.

外側紙管原紙32及び内側紙管原紙31の繊維原料は、100%クラフトパルプが望ましく、特に、広葉樹クラフトパルプを60質量%超100質量%以下、針葉樹クラフトパルプを0質量%以上60質量%未満であるのが望ましい。公知の接着糊が使用でき、抄紙も容易で、強度を発現しやすい。   100% kraft pulp is desirable as a fiber material of the outer side paper tube base paper 32 and the inner side paper tube base paper 31, and in particular, more than 60% by mass of hardwood kraft pulp and 100% by mass or less 0% by mass to less than 60% by mass softwood kraft pulp Is desirable. Known adhesive pastes can be used, paper making is easy, and strength is easily developed.

また、外側紙管原紙32及び内側紙管原紙31が、ともに非片艶紙であるのが望ましい。すなわち、乾燥がヤンキードライヤーではなく、多筒式ドライヤー等によって乾燥されている原紙であるのがよい。特に、紙面の表裏の差が少ないツインワイヤー抄紙による上質紙であるのが望ましい。つまり、紙管10は、ツインワイヤー抄紙機によって抄紙され乾燥が多筒式ドライヤーによって製造された坪量坪量145〜155g/m2の上質紙であるのが望ましい。非片艶紙は、接着剤の表面への付着及び浸透が均一になりやすく強度が発現しやすい。また、外側紙管原紙の重なり代が幅広の場合、接着糊の付着及び浸透が均一であると凸部の高さの精度が高まりエア噛みなどがより発生しがたくなる。 In addition, it is desirable that both the outer side paper base sheet 32 and the inner side paper base sheet 31 be non-glossy paper. That is, it is preferable that the base paper be dried not by the Yankee dryer but by a multi-cylinder dryer or the like. In particular, it is desirable that the high-quality paper by twin wire papermaking has a small difference between the front and back of the paper. That is, it is desirable that the paper tube 10 be high-quality paper having a basis weight of 145 to 155 g / m 2 , which is made by a twin wire paper machine and dried by a multi-cylinder dryer. Non-glossy paper is likely to have uniform adhesion and penetration of the adhesive on the surface and to develop strength. In addition, when the overlap of the outer paper core base paper is wide, if the adhesion and the adhesion of the adhesive paste are uniform, the height accuracy of the convex portion is increased and air entrapment and the like are more difficult to occur.

また、サイズ度(コッブ法)が高い方が、接着剤が付着及び浸透しやすく、ベック平滑度が高い方が、接着剤が付着及び浸透しやすい。したがって、サイズ剤やカレンダー処理によって、サイズ度及びベック平滑度を高めるのが望ましい。なお、ここでのサイズ度とは、JIS P 8140(1998)に基づくコッブサイズ度であり、ベック平滑度は、JIS P 8119(1998)に基づくものである。   In addition, when the degree of size (cobb method) is high, the adhesive adheres and penetrates easily, and when the Beck smoothness is high, the adhesive adheres and penetrates easily. Therefore, it is desirable to increase the degree of sizing and the Bekk smoothness by means of sizing agents and calendering. In addition, the size degree here is a cobb size degree based on JISP 8140 (1998), and the Beck smoothness degree is based on JIS P 8119 (1998).

次いで、紙管の製造工程について特に図4及び図5により説明する。紙管10の製造は、原反ロール31A,32Aから繰出された二枚の帯状の紙管原紙(内側紙管原紙31及び外側紙管原紙32)のうち外側紙管原紙32の内側紙管原紙対向面に糊付けロール65等によって接着剤20を付与し、外側紙管原紙32の接着剤付与面に内側紙管原紙31を幅方向に一部重ね、前記内側紙管原紙31の外側紙管原紙32との対抗しない面をマンドレルシャフト52に対向する面、すなわち紙管内面となる面にして、各紙管原紙31,32をマンドレルシャフト52に螺旋状に巻き付けて連続的に筒状部分29を形成する。その際に外側紙管原紙32については5〜18mmの重なり代をもって巻く。そして形成された筒状部分29は、家庭紙ロールの複数倍幅以上の幅でカッター58によりカットして長尺のスパイラル紙管30(スパイラル式紙管とも称される)を形成する。外側紙管原紙32に対する接着剤20の付与量は必ずしも限定されないが、1〜25.0g/m2程度である。 Next, the manufacturing process of the paper tube will be described with reference to FIGS. 4 and 5. The production of the paper tube 10 is performed by using the inner paper tube base paper 32 of the outer paper paper tube base paper 32 among the two strip-shaped paper paper sheets (inner paper paper 31 and outer paper paper 32) fed from the original fabric rolls 31A and 32A. The adhesive 20 is applied to the opposite surface by a pasting roll 65 or the like, and the inner base paper 31 is partially overlapped in the width direction on the adhesive applied side of the outer base paper 32, and the outer base paper of the inner base paper 31 The tubular base paper 31, 32 is spirally wound around the mandrel shaft 52 to form the tubular portion 29 continuously, with the surface not opposed to 32 being the surface facing the mandrel shaft 52, that is, the surface that becomes the inner surface of the paper tube. Do. At that time, the outer base paper 32 is wound with an overlap of 5 to 18 mm. Then, the formed cylindrical portion 29 is cut by a cutter 58 with a width equal to or more than a multiple of the width of a home paper roll to form a long spiral paper pipe 30 (also referred to as a spiral paper pipe). The amount of the adhesive 20 applied to the outer paper tube base paper 32 is not necessarily limited, but is about 1 to 25.0 g / m 2 .

図示の形態では、各紙管原紙31,32のマンドレルシャフト52への巻き付けは、一対のプーリー53,53間に巻き掛けられた成形ベルト54により、マンドレルシャフト52上の所定部分に位置する筒状部分29に回転力を与え、その回転により紙管原紙31,32をマンドレルシャフト52の軸心に対して所定角度で引き込んで、螺旋状に巻くようにしている。図示例では、一対のプーリー53,53を二機配置して二つの成形ベルト54,54により、筒状部分29に回転力を与えているが、一機の一対のプーリーと成形ベルトにより筒状部分に回転力を与えるようにしてもよい。また、図示しないが、筒状部分29に成形ベルト54ではなくロールを当接させて回転力を与えるようにしても、各紙管原紙31,32をマンドレルシャフト52に巻き付けることができる。   In the illustrated embodiment, the winding of each of the paper tube base papers 31 and 32 around the mandrel shaft 52 is a cylindrical portion located on a predetermined portion on the mandrel shaft 52 by the forming belt 54 wound around the pair of pulleys 53 and 53. A rotational force is applied to the roller 29, so that the paper tube base paper 31, 32 is drawn in at a predetermined angle with respect to the axis of the mandrel shaft 52 by its rotation so as to be spirally wound. In the illustrated example, two pairs of pulleys 53, 53 are arranged and the rotational force is given to the cylindrical portion 29 by the two forming belts 54, 54. However, the pair of pulleys of one machine and the forming belt form a cylinder A rotational force may be applied to the part. Further, although not shown in the drawings, even if a roll is brought into contact with the cylindrical portion 29 instead of the forming belt 54 to apply a rotational force, the paper tube base papers 31 and 32 can be wound around the mandrel shaft 52.

ここで、紙管原紙31,32をマンドレルシャフト52に巻き付けてスパイラル紙管の形成するにあたっては、図示例からも理解されるように、紙管原紙31,32が連続的にマンドレルシャフト52に送り込まれることにより筒状部分29が長くなり、その筒状部分29が連続的に形成されてマンドレルシャフト52の先端方向に伸びていく。そして、その過程では、筒状部分29の内面がマンドレルシャフト52の周面に摺接しながら、マンドレルシャフト52の先端方向に向かって移動していくことになる。   Here, in forming the spiral paper tube by winding the paper tube base paper 31, 32 around the mandrel shaft 52, the paper tube base paper 31, 32 is continuously fed into the mandrel shaft 52 as understood from the illustrated example. As a result, the cylindrical portion 29 is elongated, and the cylindrical portion 29 is continuously formed and extends in the distal direction of the mandrel shaft 52. Then, in the process, while the inner surface of the cylindrical portion 29 is in sliding contact with the circumferential surface of the mandrel shaft 52, it moves in the direction of the tip of the mandrel shaft 52.

かくして製造された長尺のスパイラル紙管30は、サーフェイスワインダーにて、この長尺のスパイラル紙管30と実質的に同幅の家庭紙が巻かれたログとされる。その後に、ログソーでログを製品幅に裁断し、個々の家庭紙ロールとされる。ログの切断と同時に、長尺の紙管も裁断され、長尺のスパイラル紙管30も個々の紙管10となる。   The long spiral paper tube 30 manufactured in this manner is a surface winder, which is a log of home paper of substantially the same width as the long spiral paper tube 30 and wound. After that, the log is cut into a product width with a log saw to make individual household paper rolls. Simultaneously with the cutting of the log, the long paper tube is also cut, and the long spiral paper tube 30 also becomes an individual paper tube 10.

次いで、本発明の実施例の紙管とその比較例の紙管を作成し、その紙管の物性値を測定した。また、紙管の製造性について評価した。さらに、各紙管を用いてサーフェイスワインダーで巻き取りを行ってログを製造し、その後にそのログをログソーで裁断して、紙管の潰れなどを評価する加工テストを行った。表中の物性値は次のようにして測定した。なお、原紙に関しては原紙の状態で測定した。   Subsequently, the paper tube of the Example of this invention and the paper tube of the comparative example were created, and the physical-property value of the paper tube was measured. In addition, the manufacturability of the paper tube was evaluated. Furthermore, the paper was wound with a surface winder using each paper tube to produce a log, and then the log was cut with a log saw, and a processing test was performed to evaluate crushing of the paper tube and the like. Physical property values in the table were measured as follows. The base paper was measured in the state of the base paper.

〔坪量〕
上記のとおり紙管を外側紙管原紙と内側紙管原紙に分離した後に、JIS P 8124(1998)の坪量測定方法に従って測定した。
[Weight basis]
As described above, after the paper tube was separated into an outer paper base and an inner paper base, it was measured according to the basis weight measurement method of JIS P 8124 (1998).

〔平滑度〕
JIS P 8119(1998)に基づくベック平滑度を測定した。測定面は、内側紙管原紙及び外側紙管原紙ともに貼り合わせ面である。試験片の寸法は、50mm角からA4サイズ以下とした。なお、数値は、5回の測定値の平均値である。なお、測定値は、紙管製造前の紙管原紙のものである。
[Smoothness]
The Beck's smoothness was measured based on JIS P 8119 (1998). The measurement surface is a bonding surface for both the inner side paperboard base paper and the outer side paper base paper. The dimensions of the test piece ranged from 50 mm square to A4 size or less. In addition, a numerical value is an average value of five measurements. In addition, a measured value is a thing of the paper tube base paper before paper tube manufacture.

〔引張り強さ〕
JIS P 8113(2006)に基づき測定した。試験片の寸法は幅15mm、長さ180mmであり、紙の縦方向及び横方向について5回の測定し、その平均値を縦及び横の引っ張り強さとした。なお、測定値は、紙管製造前の紙管原紙のものである。
[Tensile strength]
It measured based on JISP 8113 (2006). The dimensions of the test piece were 15 mm in width and 180 mm in length, and the measurement was made 5 times in the longitudinal and transverse directions of the paper, and the average value was taken as the longitudinal and transverse tensile strength. In addition, a measured value is a thing of the paper tube base paper before paper tube manufacture.

〔クラーク剛度〕
JIS P 8143(2009)の7.3自動式試験機法に基づいて測定した。試験片の寸法は、幅15mm、長さ500mmであり、紙の縦方向及び横方向について5回の測定し、その平均値を縦及び横のクラーク剛度とした。なお、測定値は、紙管製造前の紙管原紙のものである。
[Clark stiffness]
It measured based on 7.3 automatic testing machine method of JISP 8143 (2009). The dimensions of the test piece were 15 mm in width and 500 mm in length, and were measured 5 times in the longitudinal and transverse directions of the paper, and the average value was taken as the longitudinal and transverse Clark stiffness. In addition, a measured value is a thing of the paper tube base paper before paper tube manufacture.

〔コッブサイズ度120秒〕
JIS P 8140(1998)「紙及び板紙―吸水度試験方法―コッブ法」に基づいて測定した。試験器は内径112.8mm、25mmの金属製シリンダを用いた。試験片はシリンダの外径より10mm以上大きいものを用意する。質量を計測した試験片を下のゴム板とシリンダの間に挟みネジで留める。水深10mm以上となるようにシリンダ内に水を注ぐ。注ぎ始めてから120秒経過後に直ちに水を捨て、直ぐにネジを外し、試験片の質量を計測する。コッブサイズ度(A)は、吸水前後の質量差をシリンダ内部の面積(10cm2)で除して求める。
[Kopp size 120 seconds]
It measured based on JISP 8140 (1998) "paper and board-water absorption test method-Cobb method". The tester used was a metal cylinder with an inner diameter of 112.8 mm and 25 mm. Prepare a test piece 10 mm or more larger than the outer diameter of the cylinder. Hold the test piece whose mass was measured between the lower rubber plate and the cylinder with a screw. Pour water into the cylinder to a depth of 10 mm or more. Discard the water immediately after 120 seconds have passed since the start of pouring, and immediately remove the screw and measure the mass of the test piece. The Cobb size degree (A) is obtained by dividing the mass difference before and after water absorption by the area (10 cm 2 ) inside the cylinder.

〔圧縮強度〕
上記の圧縮強度を測定した。用いた機器は、端子をφ2cmとしたプッシュプルゲージ(株式会社イマダ社製の型番:Z2−20)である。
[Compressive strength]
The above compressive strength was measured. The device used is a push-pull gauge (model number: Z2-20 manufactured by Imada Co., Ltd.) with a terminal of 2 cm in diameter.

〔加工テスト〕
成形ベルトでのシワ入りについては、図5に示す装置を用いて、下記表1に記載の外側紙管原紙及び内側紙管原紙、紙管製造方法によって、2週間、紙管を製造して、シワのある紙管の発生率を確認した。◎は成形ベルトでのシワ入りなし、〇は成形ベルトで1mm程度のシワが3〜7%発生、△は成形ベルトで1mm程度のシワが7%以上、×は成形ベルトで4mm程度のシワ入り5%以上を示している。
[Processing test]
With regard to the formation of wrinkles in the forming belt, a paper tube is manufactured for 2 weeks according to the outer paper tube base paper and inner paper tube base paper described in Table 1 below and the paper tube manufacturing method using the apparatus shown in FIG. We confirmed the incidence of wrinkled paper tubes. ◎: no wrinkles in the forming belt, 〇: 3 to 7% of wrinkles of about 1 mm in the forming belt, △: 7% or more of wrinkles of about 1 mm in the forming belt, and ×: about 4 mm of wrinkles in the forming belt It shows 5% or more.

また、ワインダーでの紙管潰れは、各例に係る紙管を用いてサーフェイスワインダーにてログを製造し、ログの紙管を確認することで行った。◎はワインダーでの紙管潰れ入りなし、〇はワインダーで1mm程度の紙管潰れが3〜7%、△はワインダーで1mm程度の紙管潰れが7%以上、×はワインダーで4mm程度の紙管潰れ入り5%以上を示している。   Moreover, the paper tube crushing in a winder manufactured the log with a surface winder using the paper tube based on each case, and was performed by confirming the paper tube of log. ◎: No breakage of the paper tube in the winder, 3〜: 3 to 7% of paper tube breakage of about 1 mm in the winder, 紙: 7% or more of paper tube crushing of about 1 mm on the winder, ×: about 4 mm of paper in the winder It shows 5% or more of tube collapse.

また、ログソーでの紙管潰れは、サーフェイスワインダーにて製造した各例に係るログをログソーで114mm幅に裁断して、裁断面を確認した。◎はログソーでの紙管潰れ入りなし、〇はログソーで1mm程度の紙管潰れが3〜7%、△はログソーで1mm程度の紙管潰れが7%以上、×はログソーで4mm程度の紙管潰れ入り5%以上を示している   Moreover, the paper tube crushing with a log saw cut | judged the log which concerns on each example manufactured with the surface winder with a log saw to 114 mm width, and confirmed the cut surface. ◎: No damage to the paper tube in the log saw, 3〜: 3 to 7% damage to the paper tube with about 1 mm in the log saw, △: 7% or more failure in the paper tube with 1 mm or more in the log saw, ×: about 4 mm in the log saw Shows 5% or more of tube crush

Figure 2019058588
Figure 2019058588

表1に示されるとおり実施例1〜8については加工テストにおいてすべての項目で◎又は〇の評価が確認された。比較例については、比較例1がシワや潰れが発生しすべての項目で△の評価となった。他の比較例2〜5はいずれもシワや潰れが顕著に発生しすべての項目で×の評価となった。   As shown in Table 1, for Examples 1 to 8, the evaluation of ◎ or で was confirmed in all items in the processing test. Regarding Comparative Example, in Comparative Example 1, wrinkles and crushing occurred, and all items were evaluated as Δ. In all of Comparative Examples 2 to 5, wrinkles and crushing were significantly generated, and all items were evaluated as x.

また、坪量が高いが坪量差が大きく内側紙管原紙と外側紙管原紙の強度等の差がある比較例2は、紙管製造時のシワの発生が顕著に確認された。内側紙管原紙及び外側紙管原紙の坪量が145g/m2の比較例3は、重なり代を10mmにしても加工テストで十分な結果が得られなかった。また、比較例4のように内側紙管原紙及び外側紙管原紙の坪量が150g/m2あっても重なり代が8mm未満の場合には加工テストで十分な結果が得られなかった。比較例5は、内側紙管原紙及び外側紙管原紙の坪量が150g/m2であり、重なり代も20mmと幅広にしたが、かえって成形ベルトでのシワが顕著に発生した。対して、本発明の数値の範囲内にある各実施例は、成形ベルトでの製造時のシワやサーフェイスワインダーやログソーでの紙管潰れがほとんど発生しない。 In addition, in Comparative Example 2 in which the basis weight is high but the difference in basis weight is large and there is a difference in the strength of the inner paper core sheet and the outer paper core sheet, the occurrence of wrinkles at the time of manufacturing the paper pipe was remarkably confirmed. In Comparative Example 3 having a basis weight of 145 g / m 2 of the inner paper core and the outer paper base, even when the overlap margin was 10 mm, sufficient results were not obtained in the processing test. Further, as in Comparative Example 4, when the overlap margin is less than 8 mm even if the basis weight of the inner side paper base paper and the outer side paper base paper is 150 g / m 2 , sufficient results can not be obtained in the processing test. In Comparative Example 5, the basis weights of the inner and outer base paper sheets were 150 g / m 2 and the overlapping margin was as wide as 20 mm, but wrinkles in the forming belt were significantly generated. On the other hand, in each of the embodiments within the numerical value range of the present invention, wrinkles at the time of production with a forming belt, and breakage of a paper tube with a surface winder and a log saw hardly occur.

10、10A…紙管、11…重なり代(凸部)、20…接着剤、21,22…接着層、30…長尺の紙管、31A,32A…原反ロール、31…内側紙管原紙、32…外側紙管原紙、L1…外側紙管原紙の幅、L2…重なり代の幅、40…水平台、50…プッシュプルゲージ、51…端子、65…糊付けロール、52…マンドレルシャフト、53…プーリー、54…成形ベルト、58…カッター。 10, 10A: paper tube, 11: overlapping margin (convex portion), 20: adhesive, 21, 22: adhesive layer, 30: long paper tube, 31A, 32A: original fabric roll, 31: inner paper tube base paper , 32: outer paper tube base paper, L1: width of outer paper tube base paper, L2: width of overlapping space, 40: horizontal base, 50: push pull gauge, 51: terminal, 65: pasting roll, 52: mandrel shaft, 53 ... pulleys, 54 ... molded belts, 58 ... cutters.

Claims (3)

帯状の家庭紙が巻かれる家庭紙ロール用紙管であって、
重なり代を有してスパイラル状に巻回された外側紙管原紙とスパイラル状に巻回された内側紙管原紙とが、相互に位置をずらして重畳され接着層によって接着されており、
外側紙管原紙と内側紙管原紙の坪量が145〜155g/m2であり、
前記外側紙管原紙の幅が88〜98mmであるとともに重なり代が8〜18mmであり、かつ、紙管幅95〜120mmで外側紙管が周回するように構成されている、
ことを特徴とする家庭紙ロール用紙管。
A home paper roll paper tube on which a band of home paper is wound,
The spirally wound outer paper pipe base paper having an overlapping margin and the spirally wound inner paper pipe base paper are overlapped with each other in a mutually offset manner, and are adhered by an adhesive layer,
The basis weight of the outer side paperboard base paper and the inner side paper base paper is 145 to 155 g / m 2 ,
The width of the outer paper tube base paper is 88 to 98 mm, the overlap margin is 8 to 18 mm, and the outer paper tube is configured to circulate at a paper tube width of 95 to 120 mm.
Household paper roll paper tube characterized by.
25%圧縮時における圧縮強度が13.0〜22.5Nであり、50%圧縮時における圧縮強度が20.0〜24.5Nである請求項1記載の家庭紙ロール用紙管。   The household paper roll paper tube according to claim 1, wherein the compression strength at 25% compression is 13.0 to 22.5 N, and the compression strength at 50% compression is 20.0 to 24.5 N. 外側紙管原紙及び内側紙管原紙が非片艶紙である請求項1又は2記載の家庭紙ロール用紙管。   The home paper roll paper pipe according to claim 1 or 2, wherein the outer paper base paper and the inner paper base paper are non-glossy paper.
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* Cited by examiner, † Cited by third party
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JPH10502041A (en) * 1994-06-29 1998-02-24 ザ、プロクター、エンド、ギャンブル、カンパニー Core with preferred seam structure for paper products wound on the core
US20040185205A1 (en) * 2003-03-20 2004-09-23 Sonoco Development, Inc. Tube made out of pre-adhered plies
JP2016016951A (en) * 2014-07-09 2016-02-01 大王製紙株式会社 Paper tube and sanitary paper roll
WO2017047385A1 (en) * 2015-09-14 2017-03-23 大王製紙株式会社 Paper tube and rolled sheet employing said paper tube

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10502041A (en) * 1994-06-29 1998-02-24 ザ、プロクター、エンド、ギャンブル、カンパニー Core with preferred seam structure for paper products wound on the core
US20040185205A1 (en) * 2003-03-20 2004-09-23 Sonoco Development, Inc. Tube made out of pre-adhered plies
JP2016016951A (en) * 2014-07-09 2016-02-01 大王製紙株式会社 Paper tube and sanitary paper roll
WO2017047385A1 (en) * 2015-09-14 2017-03-23 大王製紙株式会社 Paper tube and rolled sheet employing said paper tube

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