JPH06341047A - Pulp composite sheet - Google Patents
Pulp composite sheetInfo
- Publication number
- JPH06341047A JPH06341047A JP5128655A JP12865593A JPH06341047A JP H06341047 A JPH06341047 A JP H06341047A JP 5128655 A JP5128655 A JP 5128655A JP 12865593 A JP12865593 A JP 12865593A JP H06341047 A JPH06341047 A JP H06341047A
- Authority
- JP
- Japan
- Prior art keywords
- pulp
- fibers
- long
- composite sheet
- fiber
- 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.)
- Granted
Links
Landscapes
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
- Laminated Bodies (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、使い捨て手拭き、ウェ
ットティシュ、ワイパー、使い捨て雑巾等のいわゆる拭
き布として使用されるパルプ複合シートに関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulp composite sheet used as a so-called wiping cloth for disposable hand wipes, wet tissues, wipers, disposable wipes and the like.
【０００２】[0002]
【従来の技術】従来より、使い捨て手拭き等の拭き布と
して、パルプ繊維をかさ高に集積してなる水や薬液等を
しみ込ませたものが使用されている。しかし、乾式パル
プシートは、水や薬液等をしみ込ませた後の湿潤強度が
低く、使用中に破れやすいという欠点があった。2. Description of the Related Art Hitherto, as a wiping cloth such as a disposable hand towel, a cloth impregnated with water, a chemical solution or the like in which pulp fibers are bulky accumulated is used. However, the dry pulp sheet has a drawback that it has a low wet strength after being impregnated with water, a chemical solution or the like, and is easily broken during use.
【０００３】一方、親水性繊維であるレーヨン繊維を集
積した後、レーヨン繊維相互間をゴム系結合剤で結合し
た不織布に水等をしみ込ませたものも使用されている。
この拭き布は、レーヨン繊維相互間が結合されているの
で、高い湿潤強度を示すものである。しかし、拭き布に
ゴム系結合剤が含有されているため、異臭がするという
欠点があった。また、ゴム系結合剤のざらざらとした手
触りのため、拭き布の使用感が悪いという欠点もあっ
た。このため、ゴム系結合剤を使用せずに、レーヨン繊
維相互間を結合させた不織布を使用するという試みも行
われている。この場合、レーヨン繊維相互間の結合に
は、レーヨン繊維が集積された不織布に水柱流を施すこ
とが考えられる。しかしながら、レーヨン繊維からなる
不織布をいわゆる拭き布として使用する場合、以下に示
すような致命的な欠点があった。即ち、レーヨン繊維は
親水性の不織布であるために、水を吸収して膨潤し、そ
の剛性が極端に低下するということがあった。そして、
剛性の低下によって、手指で把持したときの反発力が低
下し、いわゆる拭き布として使用する際、使用しにくい
ということがあった。On the other hand, there is also used a non-woven fabric in which rayon fibers which are hydrophilic fibers are accumulated and then water or the like is impregnated into a non-woven fabric in which rayon fibers are bonded to each other with a rubber binder.
The wiping cloth has a high wet strength because the rayon fibers are bonded to each other. However, since the wiping cloth contains a rubber-based binder, it has a drawback that it gives off an offensive odor. Further, since the rubber-based binder has a rough texture, the feeling of using the wiping cloth is not good. For this reason, attempts have been made to use a non-woven fabric in which rayon fibers are bonded to each other without using a rubber-based binder. In this case, in order to bond the rayon fibers to each other, it is conceivable to apply a water column flow to the nonwoven fabric in which the rayon fibers are accumulated. However, when a non-woven fabric made of rayon fibers is used as a so-called wiping cloth, there are the following fatal drawbacks. That is, since the rayon fiber is a hydrophilic non-woven fabric, it sometimes absorbs water and swells, so that its rigidity is extremely lowered. And
Due to the decrease in rigidity, the repulsive force when grasped with fingers is decreased, and it is difficult to use when used as a so-called wiping cloth.
【０００４】[0004]
【発明が解決しようとする課題】このため、本発明者等
は、親水性のレーヨン繊維ではなく、ポリプロピレン繊
維やポリエステル繊維等の疎水性の繊維を使用して不織
布シートを製造することを試みた。しかしながら、疎水
性の長繊維単独よりなる不織布シートは、十分な吸水性
を持たないため、水等の液体をしみ込まして使用するこ
とができず、また水等の液体を拭き取ることもできなか
った。そこで、疎水性の長繊維が集積されてなる不織布
に、レーヨン繊維よりなる不織布を積層し、不織布複合
シートとすることを試みた。しかし、この場合には、レ
ーヨン繊維よりなる不織布が積層された面のみが吸水性
で、他面（レーヨン繊維よりなる不織布が積層されてい
ない面）は吸水性がほとんどなく、いわゆる拭き布とし
て使用できなかった。このため、疎水性長繊維が集積さ
れてなる不織布の両面に、レーヨン繊維からなる不織布
を複合することも考えられるが、このような三層積層物
は厚みが厚くなって、柔軟性が極端に低下し、拭き布と
して使用しにくいということがあった。Therefore, the present inventors have tried to produce a non-woven fabric sheet by using not hydrophobic hydrophilic rayon fiber but hydrophobic fiber such as polypropylene fiber or polyester fiber. . However, since the non-woven sheet made of hydrophobic long fibers alone does not have sufficient water absorbency, it cannot be used by being impregnated with a liquid such as water, and the liquid such as water cannot be wiped off. . Therefore, an attempt was made to form a nonwoven fabric composite sheet by laminating a nonwoven fabric composed of rayon fibers on a nonwoven fabric formed by accumulating hydrophobic long fibers. However, in this case, only the surface on which the non-woven fabric made of rayon fibers is laminated absorbs water, and the other surface (the surface on which the non-woven fabric made of rayon fibers is not laminated) has almost no water absorption and is used as a so-called wiping cloth. could not. Therefore, it is possible to combine a non-woven fabric composed of rayon fibers on both sides of the non-woven fabric in which hydrophobic long fibers are accumulated. However, such a three-layer laminate has a large thickness, resulting in extreme flexibility. It has deteriorated and was difficult to use as a wipe.
【０００５】このため、疎水性長繊維よりなる不織布の
両面に紙シートを積層し、この積層物の表裏面に水柱流
を施すことによって、パルプ複合シートを製造すること
も考えられる。しかしながら、この方法は積層工程及び
水柱流処理工程が煩雑になるということがあった。更
に、水柱流処理が不十分であると、パルプ繊維と疎水性
長繊維との絡合が十分でなく、いわゆる拭き布として使
用する際に、紙シートが剥離しやすかったり、或いはパ
ルプ繊維が表面にだけ偏在しているため水等の液体の吸
水性が悪く、液体の拭き取り性が非常に劣っていた。ま
た、濡らして拭き布として使用するウェットティシュ等
の場合、液体の吸水性が劣っていると、濡らした拭き布
が簡単に乾燥してしまい、拭き取り性が非常に劣ってい
るということがあった。Therefore, it is possible to manufacture a pulp composite sheet by laminating paper sheets on both sides of a nonwoven fabric made of hydrophobic long fibers, and applying a water column flow to the front and back surfaces of the laminate. However, in this method, the lamination process and the water column flow treatment process may be complicated. Furthermore, if the water column flow treatment is insufficient, the entanglement between the pulp fibers and the hydrophobic long fibers is not sufficient, and when used as a so-called wiping cloth, the paper sheet is easily peeled off, or the pulp fibers are surfaced. Since it was unevenly distributed only in the water, the water absorption of liquids such as water was poor, and the ability to wipe liquids was very poor. Also, in the case of a wet tissue that is used as a wiping cloth when it is wet, if the water absorption of the liquid is inferior, the wet wiping cloth may easily dry and the wiping performance may be very poor. .
【０００６】そこで、本発明は、全く水を吸収しない疎
水性長繊維よりなる長繊維不織布と紙シートとを積層し
た積層体に、一定の条件で高圧水柱流を施すことによ
り、紙シートが積層していない、長繊維不織布の面にも
パルプ繊維が露出するようにすると共に、疎水性長繊維
とパルプ繊維とを緊密に絡合させ、紙シートと疎水性長
繊維が剥離することなしに、いわゆる拭き布として使用
した場合、紙シート単独よりも水の吸収性が優れ、拭き
布の両面における吸水性、拭き取り性が良好で、且つ吸
水後においても剛性の低下が少なく、使用中の取扱いに
も優れたパルプ複合シートを提供しようとするものであ
る。Therefore, according to the present invention, a paper sheet is laminated by applying a high-pressure water column flow to a laminated body in which a long-fiber nonwoven fabric made of hydrophobic long fibers that does not absorb water at all and a paper sheet are laminated under certain conditions. Not, while making the pulp fibers exposed to the surface of the long fiber non-woven fabric, intimately entangle the hydrophobic long fibers and the pulp fibers, without peeling the paper sheet and the hydrophobic long fibers, When used as a so-called wiping cloth, it has better water absorbability than a paper sheet alone, has good water absorption and wiping properties on both sides of the wiping cloth, and there is little decrease in rigidity even after water absorption, making it easy to handle during use. Also seeks to provide an excellent pulp composite sheet.
【０００７】[0007]
【課題を解決するための手段】即ち、本発明は多数の疎
水性長繊維が集積されてなる長繊維不織布と、多数のパ
ルプ繊維よりなる紙シートとが、紙シート側から高圧水
柱流により積層されると共に、該疎水性長繊維と該パル
プ繊維とは相互に緊密に絡み合った該パルプ複合シート
であり、該パルプ複合シートを構成するパルプ繊維の構
成成分が６０重量％以上であるパルプ繊維主体のパルプ
複合シートにおいて、ＪＩＳ Ｐ８１４１に示される紙
のクレム法による縦方向の水吸水高さが３０〜７０ｍｍ
／分の範囲にあることを特徴とするパルプ複合シートに
関するものである。That is, according to the present invention, a long-fiber nonwoven fabric formed by accumulating a large number of hydrophobic long fibers and a paper sheet formed by a large number of pulp fibers are laminated by a high-pressure water column flow from the paper sheet side. And the hydrophobic long fibers and the pulp fibers are intimately intertwined with each other, and the pulp fiber constituting the pulp composite sheet has a pulp fiber constituent of 60% by weight or more. In the pulp composite sheet of No. 6, the water absorption height in the longitudinal direction of the paper according to JIS P8141 by the Krem method is 30 to 70 mm.
The present invention relates to a pulp composite sheet characterized by being in the range of / minute.
【０００８】本発明によるパルプ複合シートは、多数の
疎水性長繊維が集積されてなる長繊維不織布と、多数の
パルプ繊維よりなる紙シートとが積層され、該パルプ複
合シートを構成するパルプ繊維の構成成分が６０重量％
以上のものである。長繊維不織布を構成している疎水性
長繊維としては、従来公知のものであれば、任意に使用
することができる。例えば、ナイロン等のポリアミド系
長繊維、アクリル系長繊維、ポリプロピレンやポリエチ
レン等のポリオレフィン系長繊維、ポリエチレンテレフ
タレート等のポリエステル系長繊維、ポリウレタン系長
繊維等を、単独でまたは混合して使用することも、或い
は製造時に原料となる樹脂を紡糸時に、複数の樹脂を、
または同じ樹脂でも分子量や分子量分布の異なる樹脂を
同時に紡糸して一本の繊維とする複合繊維を使用するこ
とも可能である。本発明において、長繊維を使用する理
由は、長繊維は短繊維よりも繊維間が絡合している場
合、引張り強度や形態安定性に優れているからである。
更に長繊維の場合、高圧水柱流を施しても、水柱流と共
に流失しにくく、水柱流で疎水性長繊維の間にパルプ繊
維が交絡しやすいからである。The pulp composite sheet according to the present invention comprises a long fiber non-woven fabric formed by accumulating a large number of hydrophobic long fibers and a paper sheet made up of a large number of pulp fibers, which are laminated to form a pulp composite sheet. 60% by weight of components
That is all. As the hydrophobic long fibers constituting the long fiber non-woven fabric, any conventionally known one can be used. For example, polyamide long fibers such as nylon, acrylic long fibers, polyolefin long fibers such as polypropylene and polyethylene, polyester long fibers such as polyethylene terephthalate, polyurethane long fibers, etc. may be used alone or in combination. Or, when spinning the resin that is the raw material during manufacturing,
Alternatively, it is possible to use a composite fiber in which resins having the same resin but different molecular weights or different molecular weight distributions are simultaneously spun into a single fiber. In the present invention, the reason why the long fibers are used is that the long fibers are more excellent in tensile strength and shape stability than the short fibers when the fibers are entangled with each other.
Further, in the case of long fibers, even if a high pressure water column flow is applied, the long fibers are less likely to be lost together with the water column flow, and the pulp fibers are easily entangled between the hydrophobic long fibers in the water column flow.
【０００９】また、疎水性長繊維の繊度は、１〜１０デ
ニールであるのが好ましく、より好ましくは１〜４デニ
ールである。疎水性長繊維の繊度が１０デニールを越え
ると、疎水性長繊維の曲げ剛性が高くなりすぎて、いわ
ゆる拭き布として使用した場合の柔軟性が低下する傾向
が生じ、また疎水性長繊維の坪量が３０ｇ／ｍ2以下の
場合に繊度が太いため繊維が存在していない空隙が大き
く且つ多くなる傾向のため、紙シートを積層して高圧水
柱流を施した際にその空隙部分よりパルプ繊維が過剰に
高圧水柱流と共に流失してしまうということが生じる。
逆に、疎水性長繊維の繊度が１デニール未満になると、
疎水性長繊維の製造条件が厳密になって、疎水性長繊維
を高速度で製造しにくくなり、紙シートと積層して高圧
水柱流を施してパルプ複合シートとして水で濡らして使
用する際に、剛性が低くなりやすいという傾向がある。Further, the fineness of the hydrophobic long fibers is preferably 1 to 10 denier, more preferably 1 to 4 denier. If the fineness of the hydrophobic long fibers exceeds 10 denier, the flexural rigidity of the hydrophobic long fibers becomes too high, and the flexibility tends to decrease when used as a so-called wiping cloth. When the amount is 30 g / m 2 or less, since the fineness is large, the voids where there are no fibers tend to be large and large. Therefore, when paper sheets are laminated and subjected to high pressure water column flow, pulp fibers are produced from the voids. Will be discharged along with the high pressure water column flow.
On the contrary, when the fineness of the hydrophobic long fibers becomes less than 1 denier,
When the manufacturing conditions for hydrophobic long fibers become strict, it becomes difficult to manufacture hydrophobic long fibers at high speed, and when laminated with a paper sheet and subjected to high pressure water column flow and wetted with water as a pulp composite sheet to use However, the rigidity tends to be low.
【００１０】また、長繊維不織布の坪量は、５〜３０ｇ
／ｍ2であるのが好ましい。長繊維不織布の坪量が３０
ｇ／ｍ2を越えると、紙シートと長繊維不織布の積層体
に、紙シート側から長繊維不織布側に向けて高圧水柱流
を施しても、紙シートを構成するパルプ繊維が、長繊維
不織布の裏面（紙シートと積層していない面即ち非積層
面）に移動しにくくなり、得られる不織布複合シートの
片面にのみパルプ繊維が偏在した状態となって、パルプ
繊維の少ない長繊維不織布の非積層面における吸水性が
低下する傾向が生じる。逆に長繊維不織布の坪量が５ｇ
／ｍ2未満になると、長繊維不織布の形態安定性が低下
し、得られるパルプ複合シートの湿潤強度が低下する傾
向が生じる。更に、疎水性長繊維相互間の空隙が大きく
なって、高圧水柱流を施したときに、その空隙から多量
のパルプ繊維が流失してしまい、使用後の高圧水柱流を
回収した場合に、その中にパルプ繊維が大量に混入す
る。なお、本発明において使用する長繊維不織布は、疎
水性長繊維相互間が自己融着した、いわゆるスパンボン
ド不織布であってもよいし、また疎水性長繊維相互間が
結合していないフリース状の長繊維不織布であってもよ
い。The basis weight of the long fiber non-woven fabric is 5 to 30 g.
/ M 2 is preferred. The basis weight of long-fiber non-woven fabric is 30
If it exceeds g / m 2 , even if a high-pressure water column flow is applied from the paper sheet side to the long fiber non-woven fabric side to the laminated body of the paper sheet and the long fiber non-woven fabric, the pulp fibers that make up the paper sheet will still have long fiber non-woven fabrics. It becomes difficult to move to the back surface (the surface that is not laminated with the paper sheet, that is, the non-laminated surface), and the pulp fibers are unevenly distributed only on one side of the resulting nonwoven fabric composite sheet. The water absorption tends to decrease on the laminated surface. Conversely, the basis weight of long-fiber nonwoven fabric is 5g
When it is less than / m 2 , the morphological stability of the long-fiber nonwoven fabric is deteriorated and the wet strength of the obtained pulp composite sheet tends to be decreased. Furthermore, when the voids between the hydrophobic long fibers become large and a high pressure water column flow is applied, a large amount of pulp fibers are washed away from the voids, and when the high pressure water column flow after use is recovered, A large amount of pulp fibers are mixed in. The long-fiber non-woven fabric used in the present invention may be a so-called spun-bonded non-woven fabric in which hydrophobic long-fibers are self-fused to each other, or the long-fiber non-woven fabrics are not bonded to each other. It may be a long fiber non-woven fabric.
【００１１】本発明において用いる紙シートを構成する
パルプ繊維としては、従来公知のパルプ繊維を任意に使
用することができる。例えば、針葉樹または広葉樹木材
をクラフト法、サルファイト法、ソーダ法、ポリサルフ
ァイド法等で処理した化学パルプ繊維、またはリファイ
ナーやグラインダー等で処理した機械パルプ繊維を使用
することができる。また、このパルプ繊維は晒しパルプ
繊維として使用してもよいし、未晒しパルプ繊維のまま
で使用してもよい。また、以上のパルプ繊維を単独で使
用してもよいし、混合して使用してもよい。針葉樹パル
プ繊維と広葉樹パルプ繊維とを混合して使用する場合に
は、針葉樹パルプ繊維／広葉樹パルプ繊維＝１００／０
〜２０／８０、好ましくは１００／０〜４０／６０の範
囲であるのが好ましい。広葉樹パルプ繊維の混合比が８
０重量％を越えると、広葉樹パルプ繊維は針葉樹パルプ
繊維に比べて、疎水性長繊維と交絡しにくいため、高圧
水柱流によって作製したパルプ複合シートの表面強度が
低下する傾向にある。As the pulp fiber constituting the paper sheet used in the present invention, any conventionally known pulp fiber may be used. For example, it is possible to use a chemical pulp fiber obtained by treating a softwood or a hardwood with a craft method, a sulfite method, a soda method, a polysulfide method or the like, or a mechanical pulp fiber treated with a refiner, a grinder or the like. Further, this pulp fiber may be used as a bleached pulp fiber or may be used as it is as an unbleached pulp fiber. The above pulp fibers may be used alone or in a mixture. When a mixture of softwood pulp fibers and hardwood pulp fibers is used, softwood pulp fibers / hardwood pulp fibers = 100/0
It is preferably in the range of -20/80, preferably 100 / 40-40 / 60. Mixing ratio of hardwood pulp fiber is 8
When it exceeds 0% by weight, the hardwood pulp fibers are less likely to be entangled with the hydrophobic long fibers as compared with the softwood pulp fibers, so that the surface strength of the pulp composite sheet produced by the high pressure water column flow tends to be lowered.
【００１２】また、多数のパルプ繊維よりなる紙シート
としては、坪量が、ＪＩＳ Ｐ ８１２４に示された方
法で測定して、１０〜１２０ｇ／ｍ2が好ましい。紙シ
ートの坪量が１０ｇ／ｍ2未満であると、パルプ繊維の
絶対量が少なく、得られるパルプ複合シートに十分な吸
水性や保水性を与えにくくなるという傾向が生じる。逆
に、紙シートの坪量が１２０ｇ／ｍ2を越えると、パル
プの繊維の絶対量が多すぎて、紙シートに高圧水柱流を
施しても、一個一個のパルプ繊維に疎水性長繊維と絡合
いしうる程度の運動量を与えにくくなる傾向が生じる。
更に、パルプ繊維の絶対量が多すぎて、得られるパルプ
複合シートの柔軟性が低下する傾向が生じる。また、紙
シートの密度は、ＪＩＳ Ｐ ８１１８に示された方法
で測定して、０．６ｇ／ｃｍ3 以下であるのが好まし
い。紙シートの密度が０．６ｇ／ｃｍ3 を越えると、紙
シートに高圧水柱流を施しても、パルプ繊維の運動が抑
制されて、疎水性長繊維とパルプ繊維とが交絡しにくく
なる傾向が生じる。また、用いる紙シートのＪＩＳ Ｐ
８１４１による紙のクレム法による吸水度は、縦方向
と横方向共に水吸水高さが１０ｍｍ／分以上であるのが
好ましく、１０ｍｍ／分未満であると、パルプ複合シー
トを用いて水等の液体を取り去るのに拭き残りが生じた
り、水等を浸して、いわゆるウェットティシュとして使
用する場合、濡れ性が不良であったり、水等が不均一に
濡れていたり、乾燥しやすいという問題が生じる。Further, as a paper sheet composed of a large number of pulp fibers, the basis weight is preferably 10 to 120 g / m 2 as measured by the method described in JIS P8124. When the basis weight of the paper sheet is less than 10 g / m 2 , the absolute amount of pulp fibers is small, and it tends to be difficult to give sufficient water absorption and water retention to the obtained pulp composite sheet. On the other hand, when the basis weight of the paper sheet exceeds 120 g / m 2 , the absolute amount of pulp fibers is too large, and even if high pressure water column flow is applied to the paper sheets, each pulp fiber becomes a hydrophobic long fiber. It tends to be difficult to give a momentum that can be entangled.
Furthermore, there is a tendency that the absolute amount of pulp fibers is too large and the flexibility of the obtained pulp composite sheet decreases. Further, the density of the paper sheet is preferably 0.6 g / cm 3 or less as measured by the method described in JIS P8118. When the density of the paper sheet exceeds 0.6 g / cm 3 , the movement of the pulp fibers is suppressed and the hydrophobic long fibers and the pulp fibers are less likely to be entangled even when the paper sheet is subjected to high-pressure water column flow. Occurs. Also, the JIS P of the paper sheet used
The water absorption by the Krem method of paper according to 8141 is preferably such that the water absorption height in both the longitudinal and transverse directions is 10 mm / min or more, and when it is less than 10 mm / min, a liquid such as water is obtained by using a pulp composite sheet. When it is used as a so-called wet tissue by wiping it with water or the like after removing it, there is a problem that the wettability is poor, the water or the like is unevenly wet, or it is easily dried.
【００１３】以上説明した長繊維不織布と紙シートと
は、積層されて高圧水中流を施してパルプ複合シートと
なる。この高圧水中流は、微細な直径のノズル孔を通し
て、高圧で水を噴出させて得られるものである。例え
ば、孔径０．０１〜０．４ｍｍ程度のノズル孔を通し
て、３０〜１５０Ｋｇ／ｃｍ2 程度の圧力で水を噴出さ
せて得られるものである。この高圧水柱流を、紙シート
側から疎水性長繊維不織布側に貫通するようにして行う
と、高圧水中流はまず紙シートに衝突する。そして、紙
シートが疎水性長繊維にセットされ、次いでセットされ
た状態で紙シートの破壊が生じる。この破壊によってパ
ルプ繊維に曲げやねじれ等の変形を起こさせると共に、
パルプ繊維に運動エネルギーを十分に与え、このパルプ
繊維にランダムな運動を生じさせる。その結果、これら
の複合作用によって、パルプ繊維と疎水性長繊維とが絡
み合い、更に、この疎水性長繊維同士も絡合することに
なる。このようにして、親水性であるパルプ繊維が疎水
性長繊維の中へ密に絡み合うことにより、水が毛細管現
象によりパルプ複合シートへ吸収されるようになるので
ある。The long-fiber non-woven fabric and the paper sheet described above are laminated and subjected to a high-pressure water flow to form a pulp composite sheet. This high-pressure underwater flow is obtained by ejecting water at high pressure through a nozzle hole having a fine diameter. For example, it is obtained by ejecting water at a pressure of about 30 to 150 Kg / cm 2 through a nozzle hole having a hole diameter of about 0.01 to 0.4 mm. When this high-pressure water column flow is performed so as to penetrate from the paper sheet side to the hydrophobic long-fiber nonwoven fabric side, the high-pressure water flow first collides with the paper sheet. Then, the paper sheet is set on the hydrophobic long fibers, and then the paper sheet is broken in the set state. This destruction causes deformation such as bending and twisting in the pulp fiber,
Sufficient kinetic energy is applied to the pulp fiber to cause the pulp fiber to randomly move. As a result, due to their composite action, the pulp fibers and the hydrophobic long fibers are entangled with each other, and the hydrophobic long fibers are also entangled with each other. In this manner, the hydrophilic pulp fibers are intimately entangled in the hydrophobic long fibers, so that water is absorbed into the pulp composite sheet by the capillary phenomenon.
【００１４】このパルプ複合シート中における、長繊維
とパルプ繊維の重量比はパルプ繊維が６０重量％以上で
あることが好ましい。このパルプ複合シート中における
パルプ繊維が６０重量％未満であると、親水性であるパ
ルプ繊維が、疎水性長繊維の中に絡合いしても十分な吸
水性が得られず、いわゆる拭き布として使用する場合
に、液体等の拭き取り性に劣り、また濡らして使用する
場合にも親水性であるパルプ繊維が不足しているため、
表裏で濡れ性に差が生じやすく、保水性、および拭き取
り性がムラに生じやすい。また、高圧水柱流を施した後
のパルプ複合シートのパルプ繊維の構成比率は、高圧水
柱流を施す前の紙シートの坪量と疎水性不織布の坪量を
合わせた重量中のパルプ繊維の構成比率より一般的に低
くなる。疎水性長繊維不織布より、パルプ繊維のほうが
高圧水柱流によって流失しやすいため、高圧水中流を施
した後の方が、パルプ繊維の構成比率が低くなる傾向に
ある。パルプ複合シート中のパルプ構成比率の測定は、
セルロース分解酵素（Ｃｅｌｌｕｌａｓｅ Ｔ．Ｃ．，
生化学工業製）を用いて、パルプを溶解させて測定する
ことができる。In the pulp composite sheet, the weight ratio of long fibers to pulp fibers is preferably 60% by weight or more of pulp fibers. If the pulp fibers in this pulp composite sheet are less than 60% by weight, even if the hydrophilic pulp fibers are entangled in the hydrophobic long fibers, sufficient water absorption cannot be obtained, and as a so-called wiping cloth. When used, it is inferior in wiping off liquid, etc., and when used wet, it lacks hydrophilic pulp fibers,
A difference in wettability is likely to occur between the front and back, and water retention and wiping-off property are likely to occur unevenly. In addition, the composition ratio of the pulp fibers of the pulp composite sheet after the high pressure water column flow is the composition of the pulp fibers in the weight that is the sum of the basis weight of the paper sheet before the high pressure water column flow and the basis weight of the hydrophobic nonwoven fabric. Generally lower than ratio. Since the pulp fibers are more easily washed away by the high pressure column flow than the hydrophobic long-fiber non-woven fabric, the pulp fiber composition ratio tends to be lower after the high pressure water flow. The measurement of the pulp composition ratio in the pulp composite sheet is
Cellulolytic enzyme (Cellulase TC,
(Manufactured by Seikagaku Corporation) can be used to dissolve and measure the pulp.
【００１５】本発明によるパルプ複合シートは、以上の
ようにして製造されるものであり、疎水性長繊維不織布
と紙シートとが積層されると共に、疎水性長繊維不織布
を構成する疎水性長繊維と紙シートを構成するパルプ繊
維とが相互に絡合しているものであって、該パルプ複合
シートを構成するパルプ繊維の構成成分が６０重量％以
上のものにおいて、ＪＩＳ Ｐ ８１４１に示される紙
のクレム法による吸水度試験方法で測定した縦方向の水
吸水高さが３０〜７０ｍｍ／分の範囲にあるものであ
る。ここで紙のクレム法による吸水度試験における縦方
向の試料採取方向は、製造時の進行方向を長手方向とし
て採取する。該パルプ複合シートの紙のクレム法による
吸水度試験方法で測定した縦方向の水吸水高さが３０ｍ
ｍ／分未満であると、いわゆる拭き布として使用した場
合に水等の液体を拭き取る吸水性、および水等を浸して
ウェットティシュとして使用する場合に保水性等に劣
り、拭き布としては好ましくはない。また、水吸水高さ
が７０ｍｍ／分を越えるものであると、吸水性には優れ
ているものの、ウェットティシュ等として手や物を拭い
たときに過剰の水分が残り、不快感を与え、かつ水等の
液体を拭き取る際に手に軽く力を込めて持つだけで水等
の液体が滴り落ちる傾向が見られる。The pulp composite sheet according to the present invention is manufactured as described above, and the hydrophobic long fiber nonwoven fabric and the paper sheet are laminated, and the hydrophobic long fiber constituting the hydrophobic long fiber nonwoven fabric is formed. And the pulp fibers constituting the paper sheet are intertwined with each other, and the pulp fiber constituting the pulp composite sheet has a constituent component of 60% by weight or more, and the paper shown in JIS P 8141. The water absorption height in the longitudinal direction measured by the water absorption test method by Klem method is in the range of 30 to 70 mm / min. In the water absorption test by the Klemm method for paper, the longitudinal sampling direction is the longitudinal direction which is the traveling direction during manufacturing. The water absorption height of the pulp composite sheet in the longitudinal direction measured by the Klemm method water absorption test method is 30 m.
If it is less than m / min, it has poor water absorbency for wiping off a liquid such as water when used as a so-called wiping cloth, and water retention when used as a wet tissue soaked with water, and is preferably used as a wiping cloth. Absent. When the water absorption height exceeds 70 mm / min, the water absorption is excellent, but excess water remains when a hand or an object is wiped as a wet tissue, which causes discomfort. When wiping off liquids such as water, you can see that liquids such as water tend to drip just by holding it lightly with your hand.
【００１６】以上のようなパルプ複合シートは、いわゆ
る拭き布として、或いは所望に応じて、水やエチレング
リコール、プロピレングリコールとうの湿潤剤、アルコ
ールヤ類やパラ安息香酸等の抗菌剤、防黴剤、香料等の
薬剤等が付与されて、ウェットティシュ、赤ちゃんのお
尻拭き、使い捨て手拭き、ワイパー、使い捨て雑巾等と
して使用される物である。The above-mentioned pulp composite sheet is used as a so-called wiping cloth or, if desired, as a wetting agent for water, ethylene glycol, propylene glycol, an antibacterial agent such as alcohol and parabenzoic acid, and an antifungal agent. It is used as a wet tissue, a baby's bottom wipe, a disposable hand wipe, a wiper, a disposable rag, etc. to which chemicals such as fragrances are added.
【００１７】[0017]
実施例１ ポリプロピレン長繊維が集積されてなり、且つこのポリ
プロピレン長繊維相互間が自己融着された点融着区域を
多数持つ疎水性長繊維不織布を準備した。この長繊維不
織布を構成するポリプロピレン長繊維の繊度は、３．２
デニールであり、長繊維不織布の坪量は、１２ｇ／ｍ2
であった。また、針葉樹晒しクラフトパルプ繊維を湿式
抄紙して得られたパルプ繊維からなる紙シートを用意
し、この紙シートは、ＪＩＳ Ｐ ８１２４に示された
方法で測定した坪量が、４２ｇ／ｍ2であった。そし
て、紙シートが上に位置し、長繊維不織布が下に位置す
るようにして積層し、移送コンベア上に載せた。この移
送コンベアで積層体を移送させながら、孔径０．１５ｍ
ｍのノズル孔が、１６個／ｃｍの間隔で並んでいる高圧
水柱流噴出装置を用いて、５０Ｋｇ／ｃｍ2 の水圧で高
圧水柱流を、紙シートの表面から長繊維不織布の背面に
貫通するようにして噴出させた。以上のようにして紙シ
ートを構成しているパルプ繊維と、長繊維不織布を構成
しているポリプロピレン長繊維とが交絡して、パルプ繊
維が７５重量％のパルプ繊維主体のパルプ複合シートが
得られた。得られたパルプ複合シートを、ＪＩＳ Ｐ
８１４１に示される紙のクレム法による吸水度試験方法
で測定した結果、縦方向の水吸水高さは４５ｍｍ／分で
あった。Example 1 A hydrophobic long-fiber nonwoven fabric was prepared in which polypropylene long-fibers were accumulated and which had a large number of spot-fused areas in which the polypropylene long-fibers were self-fused to each other. The fineness of the polypropylene long fibers constituting this long fiber non-woven fabric is 3.2.
Denier, the basis weight of the long-fiber nonwoven fabric is 12 g / m 2
Met. In addition, a paper sheet made of pulp fibers obtained by wet-making bleached softwood kraft pulp fibers was prepared. The paper sheet had a basis weight of 42 g / m 2 measured by the method described in JIS P8124. there were. Then, the paper sheet was placed on the upper side, and the long fiber non-woven fabric was placed on the lower side. While transferring the laminate with this transfer conveyor, the hole diameter is 0.15 m
Using a high-pressure water column flow jetting device in which m nozzle holes are arranged at intervals of 16 / cm, the high-pressure water column flow is penetrated from the surface of the paper sheet to the back surface of the long fiber non-woven fabric at a water pressure of 50 Kg / cm 2. I made it gush out. As described above, the pulp fibers constituting the paper sheet and the polypropylene long fibers constituting the long fiber non-woven fabric are entangled with each other to obtain a pulp composite sheet mainly composed of pulp fibers containing 75% by weight of pulp fibers. It was The obtained pulp composite sheet is compliant with JIS P
As a result of measurement by the water absorption test method by paper Krem method shown in 8141, the water absorption height in the longitudinal direction was 45 mm / min.
【００１８】実施例２ 実施例１で用いた坪量１２ｇ／ｍ2のポリプロピレン製
の疎水性長繊維不織布と、針葉樹晒しクラフトパルプ繊
維を湿式抄紙して得られた、ＪＩＳ Ｐ ８１２４に示
された方法で測定した坪量５５ｇ／ｍ2の紙シートを用
意した。この紙シートが上に位置し、長繊維不織布が下
に位置するように積層し、移送コンベア上に載せた。こ
の移送コンベアで積層体を移送させながら、孔径０．２
ｍｍのノズル孔が、８個／ｃｍの間隔で並んでいる高圧
水柱流噴出装置を用いて、７０Ｋｇ／ｃｍ2 の水圧で高
圧水柱流を噴出させ、紙シートの表面から長繊維不織布
の背面に貫通するようにして噴出させた。以上のように
して紙シートを構成しているパルプ繊維と、長繊維不織
布を構成しているポリプロピレン長繊維とが交絡して、
パルプ繊維が８１重量％のパルプ繊維主体のパルプ複合
シートが得られた。得られたパルプ複合シートを、ＪＩ
Ｓ Ｐ ８１４１に示される紙のクレム法による吸水度
試験方法で測定した結果、縦方向の水吸水高さは４８ｍ
ｍ／分であった。Example 2 A hydrophobic long-fiber non-woven fabric made of polypropylene and having a basis weight of 12 g / m 2 used in Example 1 and a softwood-bleached kraft pulp fiber were obtained by wet papermaking, and shown in JIS P 8124. A paper sheet having a basis weight of 55 g / m 2 measured by the method was prepared. The paper sheets were laminated so that the long-fiber non-woven fabric was at the top and the long-fiber nonwoven fabric was at the bottom and placed on a transfer conveyor. While transferring the laminated body with this transfer conveyor, the hole diameter is 0.2
Using a high-pressure water column flow jetting device in which 8 mm nozzle holes are arranged at intervals of 8 pieces / cm, a high-pressure water column flow is jetted at a water pressure of 70 Kg / cm 2 from the surface of the paper sheet to the back surface of the long-fiber nonwoven fabric. It was ejected so as to penetrate. Pulp fibers that make up the paper sheet as described above, and polypropylene long fibers that make up the long fiber nonwoven fabric are entangled,
A pulp composite sheet composed mainly of pulp fibers having 81% by weight of pulp fibers was obtained. The obtained pulp composite sheet was
As a result of measurement by the water absorption test method by the Krem method of paper shown in S P 8141, the water absorption height in the longitudinal direction is 48 m.
It was m / min.
【００１９】実施例３ ポリプロピレン長繊維が集積されてなり、且つこのポリ
プロピレン長繊維相互間が自己融着された点融着区域を
多数持つ疎水性長繊維不織布を準備した。この長繊維不
織布を構成するポリプロピレン長繊維の繊度は、３．０
デニールであり、長繊維不織布の坪量は、２３ｇ／ｍ2
であった。実施例２で用いた坪量５５ｇ／ｍ2のパルプ
繊維よりなる紙シートと長繊維不織布を、この紙シート
が上に位置し、長繊維不織布が下に位置するように積層
し、移送コンベア上に載せた。この移送コンベアで積層
体を移送させながら、孔径０．１５ｍｍのノズル孔が、
１０個／ｃｍの間隔で並んでいる高圧水柱流噴出装置を
用いて、９０Ｋｇ／ｃｍ2の水圧で高圧水柱流を噴出さ
せ、紙シートの表面から長繊維不織布の背面に貫通する
ようにして噴出させた。以上のようにして紙シートを構
成しているパルプ繊維と、長繊維不織布を構成している
ポリプロピレン長繊維とが交絡して、パルプ繊維が６８
重量％のパルプ繊維主体のパルプ複合シートが得られ
た。得られたパルプ複合シートを、ＪＩＳ Ｐ ８１４
１に示される紙のクレム法による吸水度試験方法で測定
した結果、縦方向の水吸水高さは３５ｍｍ／分であっ
た。EXAMPLE 3 A hydrophobic continuous fiber nonwoven fabric was prepared in which polypropylene continuous fibers were accumulated and which had a large number of spot fusion zones in which the polypropylene continuous fibers were self-sealed to each other. The fineness of the polypropylene long fibers constituting this long-fiber nonwoven fabric is 3.0.
Denier, long fiber non-woven fabric has a basis weight of 23 g / m 2
Met. A paper sheet made of pulp fibers having a basis weight of 55 g / m 2 and a long fiber non-woven fabric used in Example 2 were laminated so that the paper sheet was placed on the upper side and the long fiber non-woven fabric was placed on the lower side. I put it on. While transferring the laminate with this transfer conveyor, the nozzle holes with a hole diameter of 0.15 mm
Using a high-pressure water column flow jetting device lined up at intervals of 10 pieces / cm, a high-pressure water column flow is jetted at a water pressure of 90 kg / cm 2 , so that it jets from the surface of the paper sheet to the back surface of the long-fiber nonwoven fabric. Let As described above, the pulp fibers forming the paper sheet and the polypropylene long fibers forming the long fiber non-woven fabric are entangled with each other to give 68
A weight% pulp fiber based pulp composite sheet was obtained. The obtained pulp composite sheet was manufactured according to JIS P 814.
As a result of measurement by the water absorption test method by the Klemm method for paper shown in 1, the water absorption height in the longitudinal direction was 35 mm / min.
【００２０】実施例４ 実施例１で用いた坪量１２ｇ／ｍ2のポリプロピレン製
の疎水性長繊維不織布と、針葉樹晒しクラフトパルプ繊
維を湿式抄紙して得られた、ＪＩＳ Ｐ ８１２４に示
された方法で測定した坪量３８ｇ／ｍ2の紙シートを用
意した。この紙シートが上に位置し、長繊維不織布が下
に位置するように積層し、移送コンベア上に載せた。こ
の移送コンベアで積層体を移送させながら、孔径０．１
ｍｍのノズル孔が、２０個／ｃｍの間隔で並んでいる高
圧水柱流噴出装置を用いて、４０Ｋｇ／ｃｍ2 の水圧で
高圧水柱流を噴出させ、紙シートの表面から長繊維不織
布の背面に貫通するようにして噴出させた。以上のよう
にして紙シートを構成しているパルプ繊維と、長繊維不
織布を構成しているポリプロピレン長繊維とが交絡し
て、パルプ繊維が７６重量％のパルプ繊維主体のパルプ
複合シートが得られた。得られたパルプ複合シートを、
ＪＩＳ Ｐ ８１４１に示される紙のクレム法による吸
水度試験方法で測定した結果、縦方向の水吸水高さは４
４ｍｍ／分であった。Example 4 Shown in JIS P 8124, which was obtained by wet-making the hydrophobic long-fiber non-woven fabric made of polypropylene and having a basis weight of 12 g / m 2 used in Example 1 and bleached softwood kraft pulp fiber. A paper sheet having a basis weight of 38 g / m 2 measured by the method was prepared. The paper sheets were laminated so that the long-fiber non-woven fabric was at the top and the long-fiber nonwoven fabric was at the bottom and placed on a transfer conveyor. While transferring the laminate with this transfer conveyor, the hole diameter is 0.1
Using a high pressure water column flow jetting device in which 20 mm nozzle holes are arranged at intervals of 20 / cm, a high pressure water column flow is jetted at a water pressure of 40 Kg / cm 2 , and from the surface of the paper sheet to the back surface of the long fiber nonwoven fabric. It was ejected so as to penetrate. As described above, the pulp fibers constituting the paper sheet and the polypropylene long fibers constituting the long fiber non-woven fabric are entangled with each other to obtain a pulp fiber-based pulp composite sheet containing 76% by weight of pulp fibers. It was The obtained pulp composite sheet,
As a result of measurement by the water absorption test method according to the Krem's method for paper shown in JIS P 8141, the vertical water absorption height is 4
It was 4 mm / min.
【００２１】実施例５ ポリプロピレン長繊維が集積されてなり、且つこのポリ
プロピレン長繊維相互間が自己融着された点融着区域を
多数持つ疎水性長繊維不織布を準備した。この長繊維不
織布を構成するポリプロピレン長繊維の繊度は、７．６
デニールであり、長繊維不織布の坪量は、１２ｇ／ｍ2
であった。実施例２で用いた坪量５５ｇ／ｍ2のパルプ
繊維よりなる紙シートと長繊維不織布を、この紙シート
が上に位置し、長繊維不織布が下に位置するように積層
し、移送コンベア上に載せた。この移送コンベアで積層
体を移送させながら、孔径０．１５ｍｍのノズル孔が、
１０個／ｃｍの間隔で並んでいる高圧水柱流噴出装置を
用いて、７０Ｋｇ／ｃｍ2の水圧で高圧水柱流を噴出さ
せ、紙シートの表面から長繊維不織布の背面に貫通する
ようにして噴出させた。以上のようにして紙シートを構
成しているパルプ繊維と、長繊維不織布を構成している
ポリプロピレン長繊維とが交絡して、パルプ繊維が７８
重量％のパルプ繊維主体のパルプ複合シートが得られ
た。得られたパルプ複合シートを、ＪＩＳ Ｐ ８１４
１に示される紙のクレム法による吸水度試験方法で測定
した結果、縦方向の水吸水高さは４２ｍｍ／分であっ
た。Example 5 A hydrophobic continuous fiber non-woven fabric was prepared in which polypropylene continuous fibers were accumulated and which had a large number of spot-fused areas in which the polypropylene continuous fibers were self-bonded to each other. The fineness of the polypropylene long fibers constituting this long fiber non-woven fabric is 7.6.
Denier, the basis weight of the long-fiber nonwoven fabric is 12 g / m 2
Met. A paper sheet made of pulp fibers having a basis weight of 55 g / m 2 and a long fiber non-woven fabric used in Example 2 were laminated so that the paper sheet was placed on the upper side and the long fiber non-woven fabric was placed on the lower side. I put it on. While transferring the laminate with this transfer conveyor, the nozzle holes with a hole diameter of 0.15 mm
Using a high-pressure water column flow jetting device lined up at intervals of 10 pieces / cm, a high-pressure water column flow is jetted at a water pressure of 70 kg / cm 2 so as to penetrate from the surface of the paper sheet to the back surface of the long fiber nonwoven fabric. Let As described above, the pulp fibers forming the paper sheet and the polypropylene long fibers forming the long fiber non-woven fabric are entangled with each other, and the pulp fibers are
A weight% pulp fiber based pulp composite sheet was obtained. The obtained pulp composite sheet was manufactured according to JIS P 814.
As a result of measurement by the water absorption test method by the Klemm method of the paper shown in 1, the water absorption height in the longitudinal direction was 42 mm / min.
【００２２】比較例１ 高圧水柱流の水圧を１５Ｋｇ／ｃｍ2 とした以外は、実
施例２と同様な方法でパルプ複合シートを得た。得られ
たパルプ繊維が８２重量％のパルプ繊維主体のパルプ複
合シートを、ＪＩＳ Ｐ ８１４１に示される紙のクレ
ム法による吸水度試験方法で測定した結果、縦方向の水
吸水高さは２０ｍｍ／分であった。Comparative Example 1 A pulp composite sheet was obtained in the same manner as in Example 2 except that the pressure of the high pressure water column flow was changed to 15 kg / cm 2 . The obtained pulp fiber was a pulp composite sheet mainly composed of 82% by weight of pulp fiber, and was measured by a water absorption test method according to the Krem method of paper shown in JIS P 8141. As a result, the vertical water absorption height was 20 mm / min. Met.
【００２３】比較例２ 高圧水柱流の水圧を１５Ｋｇ／ｃｍ2 とした以外は、実
施例３と同様な方法でパルプ複合シートを得た。得られ
たパルプ繊維が７０重量％のパルプ繊維主体のパルプ複
合シートを、ＪＩＳ Ｐ ８１４１に示される紙のクレ
ム法による吸水度試験方法で測定した結果、縦方向の水
吸水高さは２４ｍｍ／分であった。Comparative Example 2 A pulp composite sheet was obtained in the same manner as in Example 3 except that the water pressure of the high pressure water column flow was changed to 15 kg / cm 2 . The obtained pulp fiber is a pulp composite sheet mainly composed of 70% by weight of pulp fiber, measured by a water absorption test method according to Klemm method of paper shown in JIS P 8141. As a result, the vertical water absorption height is 24 mm / min. Met.
【００２４】比較例３ ポリプロピレン長繊維が集積されてなり、且つこのポリ
プロピレン長繊維相互間が自己融着された点融着区域を
多数持つ疎水性長繊維不織布を準備した。この長繊維不
織布を構成するポリプロピレン長繊維の繊度は、８デニ
ールであり、長繊維不織布の坪量は、５０ｇ／ｍ2であ
った。実施例１で用いた坪量４２ｇ／ｍ2のパルプ繊維
よりなる紙シートと長繊維不織布を、この紙シートが上
に位置し、長繊維不織布が下に位置するように積層し、
移送コンベア上に載せた。この移送コンベアで積層体を
移送させながら、孔径０．１５ｍｍのノズル孔が、１０
個／ｃｍの間隔で並んでいる高圧水柱流噴出装置を用い
て、５０Ｋｇ／ｃｍ2 の水圧で高圧水柱流を噴出させ、
紙シートの表面から長繊維不織布の背面に貫通するよう
にして噴出させた。以上のようにして紙シートを構成し
ているパルプ繊維と、長繊維不織布を構成しているポリ
プロピレン長繊維とが交絡したが、裏面に抜けているパ
ルプ繊維は非常に少なく、パルプ繊維が４０重量％のパ
ルプ繊維主体のパルプ複合シートが得られた。得られた
パルプ複合シートを、ＪＩＳ Ｐ ８１４１に示される
紙のクレム法による吸水度試験方法で測定した結果、縦
方向の水吸水高さは１２ｍｍ／分であった。実施例１〜
５及び比較例１〜３によるパルプ複合シートを、いわゆ
る拭き布として、下記のテストに供し、その品質を評価
した。その結果を表１に示した。Comparative Example 3 A hydrophobic long fiber nonwoven fabric was prepared in which polypropylene long fibers were accumulated and which had a large number of spot-fused areas in which the polypropylene long fibers were self-fused to each other. The fineness of polypropylene long fibers constituting this long-fiber nonwoven fabric was 8 denier, and the basis weight of the long-fiber nonwoven fabric was 50 g / m 2 . A paper sheet made of pulp fibers having a basis weight of 42 g / m 2 used in Example 1 and a long fiber non-woven fabric are laminated so that the paper sheet is located above and the long fiber non-woven fabric is located below.
It was placed on the transfer conveyor. While transferring the laminate with this transfer conveyer, the nozzle hole with a hole diameter of 0.15 mm
Using a high-pressure water column flow jetting device lined up at intervals of pcs / cm, a high-pressure water column flow is jetted at a water pressure of 50 Kg / cm 2 ,
It was jetted so as to penetrate from the surface of the paper sheet to the back surface of the long-fiber nonwoven fabric. As described above, the pulp fibers forming the paper sheet and the polypropylene long fibers forming the long fiber non-woven fabric were entangled with each other. % Pulp fiber based pulp composite sheet was obtained. The obtained pulp composite sheet was measured by the water absorption test method by the Klemm method for paper shown in JIS P 8141. As a result, the vertical water absorption height was 12 mm / min. Example 1
The pulp composite sheets of No. 5 and Comparative Examples 1 to 3 were subjected to the following tests as so-called wiping cloths to evaluate their quality. The results are shown in Table 1.
【００２５】[0025]
【表１】 [Table 1]
【００２６】物性の評価方法： １）表面性：パルプ複合シートを濡らした際に、表裏差
があるかどうかを官能評価によって判定した。官能評価
は、次の５段階で行った。５…表裏差は全く感じられな
く、表裏共に濡れ性は良好である。４…長繊維側の方が
若干濡れ性に劣っている。３…長繊維側の濡れ性が悪
い。２…長繊維不織布側が所々しか濡れていない。１…
表裏差が明らかに判り、長繊維不織布側が全く濡れてい
ない。 ２）吸水性：パルプ複合シートを拭き布として、長繊維
側の水の吸水性を官能評価によって判定した。官能評価
は次の５段階で行った。５…極めて速やかに水を吸収し
た。４…速やかに水を吸収した。３…吸水性は普通であ
った。２…ゆっくりと水を吸収した。１…水をほとんど
吸収しない。 ３）拭き取り性：パルプ複合シートを水に濡らした後、
軽く絞った状態で、長繊維不織布側で机に付いた水飴の
拭き取り性を官能で評価した。官能評価は次の５段階で
行った。５…拭き取り性は極めて優れている。４…拭き
取り性は優れている。３…やや力を込めて拭けば、拭き
取れた。２…余り濡れていないため、拭き取り性はやや
不良である。１…ほとんど濡れていないため、パルプ複
合シートが水飴に接着し、机の水飴が広がった。Evaluation method of physical properties: 1) Surface property: When the pulp composite sheet was wet, it was judged by sensory evaluation whether there was a difference between front and back. The sensory evaluation was carried out in the following 5 stages. 5: No difference between front and back is felt, and both front and back have good wettability. 4 ... The long fiber side is slightly inferior in wettability. 3: The wettability on the long fiber side is poor. 2 ... The long fiber non-woven fabric side is only wet in places. 1 ...
The difference between the front and back is clearly visible, and the long fiber non-woven fabric side is not wet at all. 2) Water absorption: Using the pulp composite sheet as a cloth, water absorption on the long fiber side was evaluated by sensory evaluation. The sensory evaluation was carried out in the following 5 stages. 5 ... Absorbed water very quickly. 4 ... Immediately absorbed water. 3 ... Water absorption was normal. 2. Slowly absorbed water. 1 ... Absorbs almost no water. 3) Wipeability: after wetting the pulp composite sheet with water,
With a lightly squeezed condition, the ability to wipe off the starch syrup attached to the desk on the long fiber non-woven fabric side was evaluated organoleptically. The sensory evaluation was carried out in the following 5 stages. 5 ... Wipeability is extremely excellent. 4 ... Wipeability is excellent. 3 ... I wiped it off with some force. 2 ... Since it is not so wet, the wiping property is somewhat poor. 1 ... Since it was almost not wet, the pulp composite sheet adhered to the starch syrup, and the starch syrup on the desk spread.
【００２７】表１の結果から明らかなように、実施例１
〜５のパルプ複合シートに比べて、比較例１〜３のパル
プ複合シートは、疎水性長繊維とパルプ繊維が十分に交
絡していないため、吸水性に劣るものであった。また疎
水性長繊維不織布が紙シートと積層していない面におけ
るパルプ繊維の露出割合が少ないため、表裏差が明らか
に判り、あるいは水飴が完全に拭き取れないという、濡
れ性、表面性、拭き取り性に劣るものであった。As is clear from the results shown in Table 1, Example 1
As compared with the pulp composite sheets of Comparative Examples 1 to 5, the pulp composite sheets of Comparative Examples 1 to 3 were inferior in water absorption because the hydrophobic long fibers and the pulp fibers were not sufficiently entangled. In addition, since the exposed proportion of pulp fiber on the surface where the hydrophobic long-fiber non-woven fabric is not laminated with the paper sheet is small, the difference between the front and back can be clearly seen, or the starch syrup cannot be completely wiped off. It was inferior.
【００２８】[0028]
【発明の効果】以上説明したように、本発明は、全く水
を吸収しない疎水性長繊維よりなる長繊維不織布と紙シ
ートとを積層した積層体に、一定の条件で高圧水柱流を
施すことにより、紙シートが積層していない、長繊維不
織布の面にもパルプ繊維が露出するようにすると共に、
疎水性長繊維とパルプ繊維とを緊密に絡合させ、紙シー
トと疎水性長繊維が剥離することなしに、いわゆる拭き
布として使用した場合、紙シート単独よりも水の吸収性
が優れ、拭き布の両面における吸水性、拭き取り性が良
好で、且つ吸水後においても剛性の低下が少なく、使用
中の取扱いにも優れたパルプ複合シートを提供しようと
するものである。As described above, according to the present invention, a high pressure water column flow is applied to a laminated body in which a long fiber nonwoven fabric made of hydrophobic long fibers that does not absorb water at all and a paper sheet are laminated under a certain condition. This allows the pulp fibers to be exposed on the surface of the long fiber non-woven fabric where the paper sheets are not laminated, and
When the hydrophobic long fibers and the pulp fibers are intimately entangled with each other, and the paper sheet and the hydrophobic long fibers are not peeled off, when used as a so-called wiping cloth, the water absorption is superior to that of the paper sheet alone. An object of the present invention is to provide a pulp composite sheet which has good water absorbency and wipeability on both sides of the cloth, has little decrease in rigidity even after absorbing water, and is excellent in handling during use.
Claims (1)
織布と、木材パルプからなる紙シートを積層した後、紙
シート側から高圧水柱流を施すことにより絡合一体化し
て作製されたパルプ複合シートであって、、該パルプ複
合シートを構成するパルプ繊維の構成成分が６０重量％
以上であるパルプ繊維主体のパルプ複合シートにおい
て、ＪＩＳ Ｐ ８１４１に示される紙のクレム法によ
る吸水度試験方法で測定した縦方向の水吸水高さが３０
〜７０ｍｍ／分の範囲にあることを特徴とするパルプ複
合シート。1. A pulp produced by laminating a long-fiber non-woven fabric in which a large number of long fibers are accumulated and a paper sheet made of wood pulp, and entangled and integrated by applying a high-pressure water column flow from the paper sheet side. A composite sheet, wherein the pulp fiber constituting the pulp composite sheet contains 60% by weight of constituent components.
In the above pulp fiber-based pulp composite sheet, the water absorption height in the longitudinal direction measured by the water absorption test method by the Krem method of paper shown in JIS P 8141 is 30.
The pulp composite sheet is in the range of 70 mm / min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05128655A JP3139215B2 (en) | 1993-05-31 | 1993-05-31 | Pulp composite sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05128655A JP3139215B2 (en) | 1993-05-31 | 1993-05-31 | Pulp composite sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06341047A true JPH06341047A (en) | 1994-12-13 |
| JP3139215B2 JP3139215B2 (en) | 2001-02-26 |
Family
ID=14990183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05128655A Expired - Fee Related JP3139215B2 (en) | 1993-05-31 | 1993-05-31 | Pulp composite sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3139215B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0947414A (en) * | 1995-08-10 | 1997-02-18 | Yamazaki Sangyo Kk | Disposable dustcloth and method for its use |
| JP2010119324A (en) * | 2008-11-18 | 2010-06-03 | Kao Corp | Animal excrement-treating sheet |
| CN103437066A (en) * | 2013-08-07 | 2013-12-11 | 杭州诺邦无纺股份有限公司 | Water-flushing degradable non-woven fabric and production method thereof |
| CN104775234A (en) * | 2015-04-24 | 2015-07-15 | 杭州诺邦无纺股份有限公司 | Hot-melting reinforced type dispersible non-woven material and manufacturing method thereof |
| JP2018104840A (en) * | 2016-12-26 | 2018-07-05 | フタムラ化学株式会社 | Bilayer non-woven fabric of cellulose fiber non-woven fabric/pp resin fiber non-woven fabric |
| JP2020048680A (en) * | 2018-09-25 | 2020-04-02 | 日本製紙クレシア株式会社 | Wet tissue using composite nonwoven fabric and production method of nonwoven fabric |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01111056A (en) * | 1987-09-15 | 1989-04-27 | James River Corp Of Virginia | High strength nonwoven fabric and its production |
| JPH03268936A (en) * | 1989-10-13 | 1991-11-29 | James River Corp:The | Wiping cloth and its manufacture |
| JPH04153351A (en) * | 1990-10-12 | 1992-05-26 | Unitika Ltd | Laminated nonwoven fabric and preparation thereof |
| EP0492554A1 (en) * | 1990-12-21 | 1992-07-01 | Kimberly-Clark Corporation | High pulp content nonwoven composite fabric method of making and use of same |
-
1993
- 1993-05-31 JP JP05128655A patent/JP3139215B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01111056A (en) * | 1987-09-15 | 1989-04-27 | James River Corp Of Virginia | High strength nonwoven fabric and its production |
| JPH03268936A (en) * | 1989-10-13 | 1991-11-29 | James River Corp:The | Wiping cloth and its manufacture |
| JPH04153351A (en) * | 1990-10-12 | 1992-05-26 | Unitika Ltd | Laminated nonwoven fabric and preparation thereof |
| EP0492554A1 (en) * | 1990-12-21 | 1992-07-01 | Kimberly-Clark Corporation | High pulp content nonwoven composite fabric method of making and use of same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0947414A (en) * | 1995-08-10 | 1997-02-18 | Yamazaki Sangyo Kk | Disposable dustcloth and method for its use |
| JP2010119324A (en) * | 2008-11-18 | 2010-06-03 | Kao Corp | Animal excrement-treating sheet |
| CN103437066A (en) * | 2013-08-07 | 2013-12-11 | 杭州诺邦无纺股份有限公司 | Water-flushing degradable non-woven fabric and production method thereof |
| CN104775234A (en) * | 2015-04-24 | 2015-07-15 | 杭州诺邦无纺股份有限公司 | Hot-melting reinforced type dispersible non-woven material and manufacturing method thereof |
| JP2018104840A (en) * | 2016-12-26 | 2018-07-05 | フタムラ化学株式会社 | Bilayer non-woven fabric of cellulose fiber non-woven fabric/pp resin fiber non-woven fabric |
| JP2020048680A (en) * | 2018-09-25 | 2020-04-02 | 日本製紙クレシア株式会社 | Wet tissue using composite nonwoven fabric and production method of nonwoven fabric |
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| Publication number | Publication date |
|---|---|
| JP3139215B2 (en) | 2001-02-26 |
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