JPH05230798A - Production of bulking paper - Google Patents

Production of bulking paper

Info

Publication number
JPH05230798A
JPH05230798A JP3024192A JP3024192A JPH05230798A JP H05230798 A JPH05230798 A JP H05230798A JP 3024192 A JP3024192 A JP 3024192A JP 3024192 A JP3024192 A JP 3024192A JP H05230798 A JPH05230798 A JP H05230798A
Authority
JP
Japan
Prior art keywords
paper
foaming
pulp
density
foamed
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
Application number
JP3024192A
Other languages
Japanese (ja)
Inventor
Tsunehisa Omotani
恒久 重谷
Hiromi Kamiharaguchi
広美 上原口
Jiro Mitsuyanagi
二朗 三柳
Original Assignee
Oji Paper Co Ltd
王子製紙株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oji Paper Co Ltd, 王子製紙株式会社 filed Critical Oji Paper Co Ltd
Priority to JP3024192A priority Critical patent/JPH05230798A/en
Publication of JPH05230798A publication Critical patent/JPH05230798A/en
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a bulking paper having excellent heat-insulation and cushioning property by making a base paper from pulp and foamable particles and foaming the paper under specific condition. CONSTITUTION:A foamed base paper having a density of as low as 0.05-0.3g/cm which is comparable to that of foamed styrene can be produced by mixing a pulp with 1-40wt.% (preferably 3-20wt.%) of foamable particles, making a base paper from the mixture and foaming the obtained paper in hot water of >=90 deg.C.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【産業上の利用分野】本発明は発泡体粒子を混抄した低
密度の嵩高紙の製造法に関し、更に詳しくは、各種断熱
材やクッション剤として使用することのできる断熱性、
保温性に優れたパルプを主体とする低密度紙の製造法に
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing low-density bulky paper having foam particles mixed therein, and more specifically, a heat insulating property which can be used as various heat insulating materials and cushioning agents,
The present invention relates to a method for producing low-density paper mainly composed of pulp having excellent heat retention.
【0002】[0002]
【従来の技術】従来各種断熱材やクッション材として
は、発泡スチロールや発泡ポリエチレン等の高分子ポリ
マーが主に使用されてきているが、昨今の環境汚染の防
止のために自然に崩壊したり燃焼しても汚染物質や黒煙
等がでにくい紙基材等に切り替えが進められている。
2. Description of the Related Art Conventionally, high-molecular polymers such as expanded polystyrene and expanded polyethylene have been mainly used as various heat insulating materials and cushioning materials, but they naturally collapse or burn to prevent environmental pollution these days. Even so, switching to paper base materials that are less likely to generate pollutants and black smoke is being promoted.
【0003】このような紙基材に対して有効な断熱性や
クッション性を与えるためには独立気泡に近い空気層を
紙に与えるのが一番有効な方法であるが、従来紙状基材
に独立気泡に近い気泡を与える方法としては、中空カプ
セルを含む塗工層を設けることや、発泡性カプセルを塗
工した後、発泡させて低密度化する方法、発泡カプセル
をパルプとともに抄紙して抄紙マシンの熱ロール上で発
泡させる方法がある。これらの内、真に断熱性等に有効
な発泡紙を得るには塗工層に発泡剤を塗工して一部の層
のみを発泡状態にする方法より中空カプセルを混抄した
り発泡性カプセルを紙に混抄して紙全体に分布させる等
の方法により紙全体を発泡状態にする方が望ましい。
In order to provide such a paper substrate with effective heat insulating properties and cushioning properties, it is the most effective method to provide the paper with an air layer close to closed cells. As a method of giving bubbles close to closed cells, by providing a coating layer containing hollow capsules, after coating the expandable capsules, a method of foaming to lower the density, foaming capsules with pulp papermaking There is a method of foaming on a hot roll of a paper machine. Of these, in order to obtain a foamed paper that is truly effective for heat insulation, etc., hollow capsules can be mixed or foamed by a method in which a foaming agent is applied to the coating layer so that only some layers are in a foamed state. It is desirable to make the entire paper in a foamed state by a method such as mixing paper with paper and distributing it over the paper.
【0004】しかし、上記方法のうち中空カプセル等を
混抄する方法はパルプと中空カプセルとで比重差があり
過ぎ巧く均一に混抄する事が難しく、あまり実用的な方
法ではない。すなわち、特開昭52−39924号公報
にはシラスバルーンを抄紙の際添加して嵩高紙を作製す
る方法が示されているが、比重が低いためにシラスバル
ーンが水に浮いてしまうので抄紙しにくい問題がある。
またその実施例に示された表から判るように得られた原
紙の密度は0.37〜0.67g/cm3 であり、我々
の目標とする発泡ポリスチレン並の特性を持つための密
度は得られていない。一方、特開昭47−24263号
公報には発泡性プラスチックを繊維と混抄する方法につ
いて示されているが、その実施例1から判るようにパル
プ6gにプラスチック30gと、これは発泡性プラスチ
ックを主体とした発明であり、我々の目指す紙を主体と
するシートとは異なる。
However, among the above methods, the method of mixing hollow capsules and the like is not a very practical method because the difference in specific gravity between the pulp and the hollow capsule is so great that it is difficult to mix them uniformly and uniformly. That is, Japanese Patent Application Laid-Open No. 52-39924 discloses a method for producing bulky paper by adding shirasu balloon during papermaking, but since shirasu balloon floats in water due to its low specific gravity, papermaking is not performed. There is a difficult problem.
The density of the base paper obtained was 0.37 to 0.67 g / cm 3 as can be seen from the table shown in the example, and the density for obtaining our target characteristics similar to those of expanded polystyrene was obtained. Has not been done. On the other hand, Japanese Patent Application Laid-Open No. 47-24263 discloses a method of mixing foamable plastic with fibers. As can be seen from Example 1, 6 g of pulp and 30 g of plastic are mainly composed of foamable plastic. This is an invention that is different from the sheet mainly made of paper.
【0005】発泡性カプセルを使用する方法としては、
特開昭55−18116号公報にマイクロカプセルを混
抄して作製した振動板について記されているが、得られ
た板の密度は0.5g/cm3 程度であり、本発明の目
的とする低密度は得られていない。
As a method of using the expandable capsule,
Japanese Unexamined Patent Publication No. 55-18116 discloses a diaphragm prepared by mixing microcapsules. The density of the resulting board is about 0.5 g / cm 3, which is low for the purpose of the present invention. Density is not obtained.
【0006】また、発泡性カプセルを使用する方法はた
とえば特開昭63ー173686号公報に感熱紙の原紙
製造に抄紙マシンの熱ロール上で発泡させる方法が記載
されているが、得られた原紙の密度は0.5g/cm3
程度しか低密度化しておらず、有効な断熱性やクッショ
ン性を得るには不十分である。すなわち、断熱材料とし
て通常使用されている発泡スチロールの熱伝導性は0.
045w/m/k程度と小さいが、上記発泡カプセルを
使用して密度0.5g/cm3 の原紙の場合の熱伝導性
は0.07w/m/kと非常に大きく、断熱材としては
まだ不十分であることが判った。
Regarding the method of using the expandable capsule, for example, Japanese Patent Laid-Open No. 173686/1988 describes a method of foaming on a heat roll of a papermaking machine in the production of base paper for thermal paper. Has a density of 0.5 g / cm 3
The density is reduced only to some extent, which is insufficient for obtaining effective heat insulating properties and cushioning properties. That is, the thermal conductivity of styrofoam normally used as a heat insulating material is 0.
Although it is as small as 045 w / m / k, it has a very high thermal conductivity of 0.07 w / m / k when it is used as a base paper with a density of 0.5 g / cm 3 using the above-mentioned foam capsule, and is still a heat insulating material. It turned out to be insufficient.
【0007】以上のとおり、発泡ポリスチレンと同等の
断熱性、保温性、強度等の特性を有する低密度紙基材は
いまだ知られておらず、その開発が要望されている。ま
た、そのような紙基材を主体とした容器が求められてい
る。
As described above, a low density paper base material having properties such as heat insulating properties, heat retention properties and strength equivalent to those of expanded polystyrene has not yet been known, and its development is desired. Further, there is a demand for a container mainly composed of such a paper base material.
【0008】すなわち、液体を芯物質とした発泡剤は発
泡を起こさせるのにある適切な温度に加熱処理する必要
がある。例えば、松本油脂(株)製のマツモトマイクロ
スフェアF30の場合、発泡物質の体積膨張率でみた発
泡倍率は、加熱時間1分で130〜140℃で最高にな
り(約80倍)、一方110℃または160℃になると
もう発泡倍率は40倍前後となり有効な発泡が得られな
くなると記述されている。
That is, the foaming agent containing a liquid as a core substance needs to be heat-treated at an appropriate temperature for causing foaming. For example, in the case of Matsumoto Yushi Co., Ltd.'s Matsumoto Microsphere F30, the expansion ratio in terms of the volume expansion coefficient of the foamed material reaches a maximum at 130 to 140 ° C. in a heating time of 1 minute (about 80 times), while 110 ° C. Alternatively, it is described that at 160 ° C., the foaming ratio is already around 40 times and effective foaming cannot be obtained.
【0009】本発明者等は、このマイクロスフェアをパ
ルプに10%添加した100g/m2 のシートを、
(株)エフシー製作所のロータリードライヤーを使用し
て初期設定温度95、105、130、150℃、3分
で加熱発泡テストを行った結果、得られた原紙の密度
(JISで測定)は、0.38,0.30,0.24,
0.18g/cm3となり、130℃以上になるとかな
り低密度の原紙が得られることが判った。
The present inventors have prepared a sheet of 100 g / m 2 obtained by adding 10% of this microsphere to pulp.
As a result of performing a heat foaming test at an initial setting temperature of 95, 105, 130, 150 ° C. for 3 minutes using a rotary dryer manufactured by FC Manufacturing Co., Ltd., the density of the obtained base paper (measured by JIS) was 0. 38, 0.30, 0.24
It became 0.18 g / cm 3 , and it was found that a base paper having a considerably low density can be obtained at 130 ° C. or higher.
【0010】しかし130℃以上で発泡させた原紙には
見かけ上未発泡のような痘痕状の部分が所々に発生して
おり、均一な発泡紙が得られないことが判った。その原
因としては、カプセルが破壊して発泡が充分得られなか
ったり、周囲が先に発泡してしまったために熱源と接触
出来なくなって発泡できないでいることが判った。
However, it has been found that the base paper foamed at a temperature of 130 ° C. or higher has some small pox-like portions which seem to be unfoamed, and a uniform foamed paper cannot be obtained. It was found that the cause was that the capsule was broken and foaming was not sufficiently obtained, or that the surrounding area was foamed first, so that the capsule could not be contacted with the heat source and could not be foamed.
【0011】このように液体を芯物質とする発泡剤をパ
ルプと混抄したシートから後加熱により発泡紙を得る場
合に、一般的に紙の抄紙の乾燥工程のドライヤーの適温
である70〜130℃では原紙の密度0.05〜0.3
g/cm3 の低密度発泡原紙を均一に製造することが難
しいこと、また、110〜150℃の高温を得ることの
できる、例えばヤンキードライヤーつきの抄紙機を使っ
たとしても均一な発泡原紙を得るには痘痕状のムラの発
生などの難点があることが判った。
When a foamed paper is obtained by post-heating from a sheet obtained by mixing a foaming agent containing a liquid as a core substance with pulp in this way, it is generally at a suitable temperature of a dryer of 70 to 130 ° C. which is a dryer in the step of drying the paper making process. Then the density of the base paper is 0.05 to 0.3
It is difficult to produce a low-density foamed base paper of g / cm 3 uniformly, and it is possible to obtain a high-foamed base paper that can obtain a high temperature of 110 to 150 ° C., for example, even if a paper machine with a Yankee dryer is used. Was found to have problems such as the formation of smallpox-like unevenness.
【0012】[0012]
【発明が解決しようとする課題】本発明は、液体を芯物
質とする発泡材を混入して抄紙したシートを加熱発泡さ
せることにより密度が0.05〜0.3g/cm3の発
泡ポリスチレン並みの断熱性およびクッション性に優れ
た嵩高紙を製造する方法を与えるものである。
DISCLOSURE OF THE INVENTION According to the present invention, a sheet made from a foam material containing a liquid as a core substance is heated and foamed to have the same density as expanded polystyrene having a density of 0.05 to 0.3 g / cm 3. The present invention provides a method for producing bulky paper having excellent heat insulating properties and cushioning properties.
【0013】[0013]
【問題を解決するための手段】本発明者等は、パルプと
発泡性粒子とを混抄して得られた原紙を加熱により発泡
させて、低密度の嵩高紙を製造する場合、上記原紙を9
0℃以上の高温水と接触させて発泡性粒子を発泡させる
ことにより、0.05〜0.3g/cm3の低密度の嵩
高紙を得ることができた。
[Means for Solving the Problem] When the present inventors produce a low-density bulky paper by foaming a base paper obtained by mixing pulp and expandable particles by heating,
A low-density bulky paper having a low density of 0.05 to 0.3 g / cm 3 could be obtained by foaming the expandable particles by bringing them into contact with high temperature water of 0 ° C. or higher.
【0014】上記高温水の処理温度がカタログに表示さ
れている適性温度範囲よりかなり低い温度で良好な安定
した発泡が得られるというのは理由が不明であるが、熱
水に含浸すると加熱接触が均一になるので全面均一に発
泡した原紙が得られることは理解できる。
It is not known why good stable foaming can be obtained at a temperature considerably lower than the suitable temperature range indicated in the catalog, but when impregnated in hot water, heating contact occurs. It can be understood that the base paper is uniformly foamed so that the base paper is uniformly foamed.
【0015】例えば、上記100g/m2のマイクロス
フェアー混抄紙を96℃の熱湯に3秒間漬けたところ密
度0.17g/cm3の全面均一な低密度発泡原紙が得
られた。この原紙の熱電導性を測定したところ、0.0
38w/m/kと発泡ポリスチレンに匹敵するほど良好
であり、しかも均一であった。
For example, when the 100 g / m 2 microsphere-blended paper was dipped in hot water at 96 ° C. for 3 seconds, a low-density foam base paper with a density of 0.17 g / cm 3 was obtained. The heat conductivity of this base paper was measured and found to be 0.0
It was 38 w / m / k, which was as good as that of expanded polystyrene and was uniform.
【0016】このようにパルプを主体とする原紙の発泡
体を用いて発泡ポリスチレン、発泡ポリエチレン等に代
え得る良好な断熱性またはクッション性を持つ発泡原紙
が得られることが判った。
As described above, it has been found that a foamed base paper having good heat insulation or cushioning properties, which can be replaced with expanded polystyrene, expanded polyethylene or the like, can be obtained by using the foamed base paper mainly composed of pulp.
【0017】このような90〜100℃の熱水は工業的
には利用が割りと容易であり、全面均一な発泡原紙を工
業的に製造するのに適している。すなわち、平底の容器
の底を二重にして蒸気を通せるようにしたジャケット付
きの容器で中の水を加温して90〜100℃の熱水を得
てこの中に発泡する原紙を通すことが出来るし、同じく
深底のジャケット付きの容器でもできる。また、温水タ
ンクに蒸気を吹き込むことにより100℃近くの熱水を
造ることが出来るし、また、発泡させる熱水を入れるパ
ンに直接蒸気を吹き込んで90〜100℃の温度を得る
ことが出来る。また、発泡させるパンに熱水を供給する
配管中に直接蒸気を吹き込むことによっても同様に熱水
を得ることが出来る。
Such hot water of 90 to 100 ° C. is relatively easy to use industrially, and is suitable for industrially producing a foamed base paper having a uniform surface. That is, by heating the water in a container with a jacket in which the bottom of a flat-bottomed container is doubled so that steam can pass therethrough, hot water of 90 to 100 ° C. is obtained, and the foaming base paper is passed through this. It can also be done in a deep-jacketed container as well. Also, by blowing steam into the hot water tank, hot water of around 100 ° C. can be produced, and by blowing steam directly into a pan containing hot water to be foamed, a temperature of 90 to 100 ° C. can be obtained. Further, hot water can be similarly obtained by blowing steam directly into the pipe for supplying hot water to the pan to be foamed.
【0018】この発泡処理を行う装置としては種々のも
のが使用できる。すなわち、平らなトレイ状または平た
い箱型の容器に熱湯を発泡させる原紙に平行にまたは対
向して流し接触させて発泡させたり、深い縦長の容器中
に熱湯を循環させその中に紙を往復させて接触させ発泡
させることが出来る。そして、上述の装置に熱水を循環
させる代わりに、蒸気を容器中の湯に直接吹き込み90
〜100℃の熱水を備えた装置を得ることが出来る。ま
た、径の大きい2本のロール(例えば抄紙機のサイズプ
レス)の上部窪みに熱水を供給しそのロール間隙に紙を
上からか下から走行させることにより熱水と接触させ発
泡させる方法等が考えられる。
Various devices can be used as the device for performing the foaming treatment. That is, in a flat tray-shaped or flat box-shaped container, the hot water is foamed in parallel or opposite to the base paper so that the hot water is made to come into contact and foamed, or the hot water is circulated in a deep vertical container and the paper is reciprocated therein. Can be contacted and foamed. Then, instead of circulating hot water in the above-described device, steam is blown directly into the hot water in the container.
It is possible to obtain an apparatus equipped with hot water of -100 ° C. In addition, a method of supplying hot water to the upper depressions of two rolls having a large diameter (for example, a size press of a paper machine) and running the paper through the gap between the rolls from above or below to bring the paper into contact with hot water to foam Can be considered.
【0019】次に本発明について詳細に説明する。Next, the present invention will be described in detail.
【0020】発泡させる原紙の抄造は、パルプを主体に
した繊維材料に、液体を芯物質とする発泡体を1〜40
%添加し、湿紙紙力剤、乾紙紙力剤、サイズ剤、填料、
顔料等を必要に応じ添加してまず湿紙を製造する。これ
をプレスで通常通り水分60%前後に脱水しドライヤー
で乾燥する。ただしこのときの乾燥温度は100℃以下
であることが好ましい。これは発泡剤を無駄に発泡させ
てしまわないようにするためである。この乾燥原紙の水
分は50〜2%程度であることが適当であり、すなわち
後工程の熱湯発泡処理で原紙が破壊損傷等が起きなけれ
ば良い。次いで、90〜100℃の熱水に1〜10秒程
度接触させ発泡体を発泡させ次いで100℃以下のドラ
イヤーで乾燥させ発泡原紙を製造する。
Papermaking of the base paper to be foamed is carried out by adding 1 to 40 foams containing a liquid as a core substance to a fiber material mainly composed of pulp.
%, Wet paper strength agent, dry strength agent, sizing agent, filler,
First, a wet paper web is manufactured by adding pigments and the like as needed. This is dehydrated with a press to a water content of about 60% as usual and dried with a dryer. However, the drying temperature at this time is preferably 100 ° C. or lower. This is to prevent the foaming agent from being foamed unnecessarily. It is appropriate that the dry base paper has a water content of about 50 to 2%, that is, the base paper is not destroyed or damaged by the hot water foaming treatment in the subsequent step. Next, it is contacted with hot water at 90 to 100 ° C. for about 1 to 10 seconds to foam the foam, and then dried by a dryer at 100 ° C. or less to produce a foam base paper.
【0021】使用するパルプは特に制限が無いが、本発
明に使用されるパルプとしては、例えば針葉樹や広葉樹
の化学パルプや機械パルプ等の木材パルプ、古紙パル
プ、麻や綿等の非木材天然パルプ、ポリエチレン、ポリ
プロピレン等を原料とした合成パルプ等を挙げる事がで
き、これらを組み合わせて適宜使用する。上記のパルプ
の他にアクリル繊維、レーヨン繊維、フェノール繊維、
ポリアミド繊維、ポリエステル繊維等の有機繊維、ガラ
ス繊維、炭素繊維、アルミナ繊維等の無機繊維等、各種
の繊維を混抄することも可能である。しかしながら、抄
紙性の観点からすると、パルプを50%以上配合した方
がシートの地合、強度において優れており、好都合であ
る。繊維配合としては、針葉樹パルプや合成パルプの繊
維長の長いものを少なくとも5〜20%使用する方が熱
水に対して強度があり好ましい。
The pulp used is not particularly limited, but examples of the pulp used in the present invention include wood pulp such as chemical pulp and mechanical pulp of softwood and hardwood, waste paper pulp, non-wood natural pulp such as hemp and cotton. Examples thereof include synthetic pulps made of polyethylene, polypropylene, etc. as raw materials, and these are appropriately used in combination. In addition to the above pulp, acrylic fiber, rayon fiber, phenol fiber,
It is also possible to mix various fibers such as organic fibers such as polyamide fibers and polyester fibers, inorganic fibers such as glass fibers, carbon fibers and alumina fibers. However, from the viewpoint of paper-making properties, it is advantageous that the pulp is blended in an amount of 50% or more because the sheet texture and strength are excellent. As a fiber blend, it is preferable to use at least 5 to 20% of a softwood pulp or a synthetic pulp having a long fiber length because it has a strength against hot water.
【0022】発泡剤としては、マイクロカプセル内に低
沸点溶剤を封入した熱膨張性マイクロカプセルを使用す
る。このカプセルは、80〜200℃の比較的低温度で
短時間の加熱により、直径が約4〜5倍、体積が50〜
100倍に膨張する平均粒径10〜30μmの粒子であ
る。イソブタン、ペンタン、石油エーテル、ヘキサン、
低沸点ハロゲン化炭化水素、メチルシラン等の揮発性有
機溶剤(膨張剤)を、塩化ビニリデン、アクリロニトリ
ル、アクリル酸エステル等の共重合体からなる熱可塑性
樹脂で包み込んだものであり、カプセルがポリマーの軟
化点以上に加熱されると膜ポリマーが軟化しはじめ、内
包されている膨張剤の蒸気圧が上昇して膜が広がり、カ
プセルが膨張する。比較的低温、短時間で膨張して独立
気泡を形成し、優れた断熱性を付与できる。
As the foaming agent, heat-expandable microcapsules in which a low boiling point solvent is enclosed in microcapsules are used. This capsule has a diameter of about 4 to 5 times and a volume of 50 to 50 by heating at a relatively low temperature of 80 to 200 ° C for a short time.
These particles have an average particle size of 10 to 30 μm and expand 100 times. Isobutane, pentane, petroleum ether, hexane,
A volatile organic solvent (swelling agent) such as low-boiling halogenated hydrocarbons and methylsilane is wrapped in a thermoplastic resin consisting of a copolymer of vinylidene chloride, acrylonitrile, acrylic ester, etc., and the capsule softens the polymer. When heated above the point, the film polymer begins to soften, the vapor pressure of the encapsulating expander rises, the film expands, and the capsule expands. It expands at a relatively low temperature in a short time to form closed cells, and can provide excellent heat insulation.
【0023】発泡性粒子の配合量は重量でパルプ繊維に
対して1〜40%、好ましくは3〜20%であり、1%
以下では十分な発泡が得られず、40%以上では経済性
の面からあまり適当とはいえない。
The content of the expandable particles is 1 to 40% by weight, preferably 3 to 20%, and 1% by weight based on the pulp fiber.
In the following, sufficient foaming cannot be obtained, and in the case of 40% or more, it is not so suitable from the economical aspect.
【0024】パルプスラリーにはこれらの発泡性粒子の
他に、従来より使用されている各種のアニオン性、ノニ
オン性、カチオン性あるいは両性の歩留まり向上剤、紙
力増強剤、サイズ剤等を適宜選択して使用することがで
きる。そして、抄紙原料のゼータ電位は、発泡剤の抄紙
時の歩留まりを良くするために−15mVから10mV
にあることが好ましい。使用できる薬品の具体的な例を
次にあげる。紙力増強剤、歩留まり向上剤としては、ポ
リアクリルアミド系のカチオン性、ノニオン性、アニオ
ン性および両性の樹脂、ポリエチレンイミンおよびその
誘導体、ポリエチレンオキサイド、ポリアミン、ポリア
ミド、ポリアミドポリアミンおよびその誘導体、カチオ
ン性および両性澱粉、酸化澱粉、カボキシメチル化澱
粉、植物ガム、ポリビニルアルコール、尿素ホルマリン
樹脂、メラミンホルマリン樹脂、親水性のポリマー粒子
等の有機系化合物、および硫酸バンド、アルミナゾル、
塩基性硫酸アルミニウム、塩基性塩化アルミニウム、塩
基性ポリ水酸化アルミニウム等のアルミ化合物、さらに
硫酸第一鉄、塩化第二鉄あるいはコロイダルシリカ、ベ
ントナイト等の無機系化合物等を適宜組み合わせて使用
する。
In addition to these expandable particles, various types of conventionally used anionic, nonionic, cationic or amphoteric retention aids, paper strength enhancers, sizing agents, etc. are appropriately selected for the pulp slurry. Can be used. The zeta potential of the papermaking raw material is -15 mV to 10 mV in order to improve the yield of the foaming agent during papermaking.
Is preferred. The following are specific examples of chemicals that can be used. Paper strength enhancers and retention aids include polyacrylamide-based cationic, nonionic, anionic and amphoteric resins, polyethyleneimine and its derivatives, polyethylene oxide, polyamines, polyamides, polyamide polyamines and their derivatives, cationic and Amphoteric starch, oxidized starch, caboxymethylated starch, plant gum, polyvinyl alcohol, urea formalin resin, melamine formalin resin, organic compounds such as hydrophilic polymer particles, and sulfuric acid band, alumina sol,
Aluminum compounds such as basic aluminum sulfate, basic aluminum chloride and basic polyaluminum hydroxide, and further inorganic compounds such as ferrous sulfate, ferric chloride or colloidal silica and bentonite are used in appropriate combination.
【0025】サイズ剤としては、酸性抄紙用サイズ剤と
してロジン系サイズ剤、石油樹脂系サイズ剤、中性抄紙
用サイズ剤としアルキルケテンダイマー系サイズ剤、ア
ルケニル無水コハク酸系サイズ剤等の各種サイズ剤を挙
げることができる。
As the sizing agent, various sizes such as rosin-based sizing agent, petroleum resin-based sizing agent as acidic papermaking sizing agent, alkyl ketene dimer-based sizing agent and alkenyl succinic anhydride-based sizing agent as neutral papermaking sizing agent An agent can be mentioned.
【0026】そして、発泡性粒子を混合したパルプスラ
リー中には一般に公知である填料、例えばタルク、カオ
リン、焼成カオリン、クレー、ケイソウ土、重質炭酸カ
ルシウム、炭酸マグネシウム、水酸化アルミニウム、二
酸化チタン、硫酸マグネシウム、シリカ、アルミノ珪酸
塩、ベントナイト等の鉱物質填料やポリスチレン粒子、
尿素ホルマリン樹脂粒子等の有機合成填料等も適宜選択
して併用が可能である。
In the pulp slurry in which the expandable particles are mixed, generally known fillers such as talc, kaolin, calcined kaolin, clay, diatomaceous earth, ground calcium carbonate, magnesium carbonate, aluminum hydroxide, titanium dioxide, Mineral filler such as magnesium sulfate, silica, aluminosilicate, bentonite and polystyrene particles,
Organic synthetic fillers such as urea formalin resin particles can be appropriately selected and used in combination.
【0027】さらに、染料、PH調整剤、スライムコン
トロール剤、消泡剤、粘剤等の抄紙用添加助剤も用途に
応じて適宜使用できる。
Further, a papermaking additive such as a dye, a pH adjusting agent, a slime control agent, a defoaming agent, and a sticky agent can be appropriately used according to the intended use.
【0028】また、サイズプレス、ゲートロール等の塗
工方法にてシートの表面に澱粉、ポリビニルアルコー
ル、各種表面サイズ剤、顔料等を塗布することも可能で
ある。
It is also possible to apply starch, polyvinyl alcohol, various surface sizing agents, pigments, etc. to the surface of the sheet by a coating method such as a size press or a gate roll.
【0029】以上の構成原料を主原料とし、通常の抄紙
マシーンにてシート化する。まず、ドライヤーパートに
より乾燥処理するが、このドライヤーパートの表面温度
によって、乾燥と同時のシート中に混抄した発泡性粒子
が発泡し、シート基材中に多数の独立気泡体帯を形成
し、密度が低く、断熱性に優れたシートとなる。
The above constituent raw materials are used as main raw materials and formed into a sheet by an ordinary papermaking machine. First, it is dried by a dryer part, but due to the surface temperature of this dryer part, the expandable particles mixed in the sheet are foamed at the same time as the drying, and a large number of closed cell bands are formed in the sheet base material. Is low and the sheet has excellent heat insulation.
【0030】ここで、シートの坪量は25〜400g/
2であり、坪量が25g/m2以下では十分な断熱性が
あるシートが得られず、また、400g/m2以上では
抄紙機の乾燥工程のドライヤーへの負荷が大きすぎて十
分な加熱処理が得られず、発泡性粒子が十分に発泡する
までに至らない。但し、100g/m2以下の低坪量紙
を貼り合わせて使用することは、坪量を上げて抄紙した
場合と同様で、本発明の範疇に入る。
Here, the basis weight of the sheet is 25 to 400 g /
m 2, and a basis weight of not have sufficient heat insulation sheet is obtained with 25 g / m 2 or less, the load on the dryer the drying process of the paper machine is 400 g / m 2 or more is too large enough No heat treatment is obtained, and the expandable particles do not sufficiently expand. However, it is within the scope of the present invention to use a paper having a low basis weight of 100 g / m 2 or less, which is used in the same manner as the case where the basis weight is increased.
【0031】次に熱水による発泡処理について説明す
る。
Next, the foaming treatment with hot water will be described.
【0032】まず、本発明の第一の製造方法としては、
抄紙工程のワイヤーパートでシート化した後、プレスパ
ートにより脱水し、後の乾燥を容易にするために、ここ
で水分量を抄紙原紙の60%前後にまで落とす。続いて
多筒式ドライヤーで乾燥し、水分を50〜5%に乾燥
し、90℃以上の熱水の発泡装置にいれる。水分が多い
ときは発泡装置中はベルト等の搬送装置に載せて発泡さ
せる方が紙切れが少なく良好である。10%前後まで乾
燥すればそのままでも紙切れが少ないが、さらに、針葉
樹パルプを20%以上と多くしたりポリアミドポリアミ
ンおよびその誘導体の湿紙強度強度剤を添加しておけば
紙切れは殆ど問題が無くなる。次いで発泡した湿紙を多
筒式ドライヤー、送風ドライヤー等で水分10%に乾燥
して巻き取る。原紙が厚い時にはオンラインでシートカ
ッターで断裁し枚葉とすることも可能である。
First, as the first manufacturing method of the present invention,
After being formed into a sheet by the wire part in the papermaking process, it is dehydrated by the press part, and the water content is dropped to about 60% of the papermaking base paper here in order to facilitate subsequent drying. Then, it is dried with a multi-cylinder dryer to dry the moisture to 50 to 5%, and put in a hot water foaming device at 90 ° C or higher. When the amount of water is large, it is preferable to place it on a conveying device such as a belt in the foaming device for foaming so that paper breakage is reduced. If it is dried up to around 10%, there will be little paper breakage as it is, but if the softwood pulp content is increased to 20% or more and a polyamide paper polyamine and its derivative wet paper strength additive is added, there will be almost no problems with paper breakage. Next, the foamed wet paper is dried to a water content of 10% by a multi-cylinder dryer, an air blow dryer or the like and wound up. When the base paper is thick, it is possible to cut it into sheets using a sheet cutter online.
【0033】第2の方法としては上述の方法で抄紙して
未発泡紙として巻き取りに仕上げる。それをオフライン
で90℃以上の熱水の発泡装置にいれ発泡させその後乾
燥を行う。
As a second method, the paper is made by the above-mentioned method, and the unfoamed paper is wound up. It is put into a foaming device of hot water of 90 ° C. or higher to foam, and then dried.
【0034】本発明における湿紙の乾燥には、発泡前の
湿紙を乾燥する時は70℃〜100℃で行い発泡体の余
分な発泡を防ぐ必要があり、発泡後の湿紙の乾燥には7
0〜120°Cで行い余り高温にして発泡体の収縮を発
生させることのないようにする必要がある。
To dry the wet paper web in the present invention, it is necessary to prevent excess foaming of the foam when drying the wet paper web before foaming, and it is necessary to dry the wet paper web after foaming. Is 7
It is necessary to carry out the treatment at 0 to 120 ° C. and raise the temperature so high that the shrinkage of the foam does not occur.
【0035】このように、パルプに加熱により体積が1
0〜100倍に増加する液体を芯物質とするカプセルを
混抄した原紙を90℃以上の熱水で発泡させることによ
り、均一で密度が0.05〜0.3g/cm3 の低密度
の原紙を製造する方法が得られた。
In this way, the volume of pulp is reduced to 1 by heating.
A low-density base paper with a uniform density of 0.05 to 0.3 g / cm 3 is obtained by foaming a base paper mixed with capsules containing a core substance of a liquid that increases from 0 to 100 times with hot water at 90 ° C. or higher. A method of manufacturing is obtained.
【0036】[0036]
【実施例】以下に実施例を挙げて本発明をより具体的に
説明するが、もちろん本発明はこれによって限定される
ものではない。なお、以下において%はすべて重量の%
を示す。
The present invention will be described in more detail with reference to the following examples, but of course the present invention is not limited thereto. In the following,% is% of weight
Indicates.
【0037】実施例1 カナダ標準濾水度(CSF)420mlに叩解した広葉
樹晒パルプ(LBKP)80%とカナダ標準濾水度(C
SF)420mlに叩解した針葉樹晒パルプ(NBK
P)20%とから成るパルプを分散したパルプスラリー
に、発泡性マイクロカプセル粒子(松本油脂製薬(株)
製、マツモトマイクロスフェアーF−30D、粒子径1
0〜20μm、最高発泡温度130℃)10%、乾燥紙
力増強剤(荒川化学工業(株)製、ポリストロン11
7)0.2%、カチオン化澱粉(王子ナショナル社製、
CATO−15)1.0%、アルキルケテンダイマー系
サイズ剤(荒川化学工業(株)製、サイズパインK90
3)0.07%、湿潤紙力増強剤(DICハーキュレス
社製、カイメン557H)0.4%をよく撹拌しながら
添加し、パルプ濃度0.5%の抄紙原料とした。
Example 1 80% of hardwood bleached pulp (LBKP) beaten to 420 ml of Canadian standard freeness (CSF) and Canadian standard freeness (C)
SF) Softwood bleached pulp (NBK) beaten to 420 ml
P) 20% pulp was dispersed in a pulp slurry to form expandable microcapsule particles (Matsumoto Yushi-Seiyaku Co., Ltd.).
Made by Matsumoto Microsphere F-30D, particle size 1
0 to 20 μm, maximum foaming temperature 130 ° C.) 10%, dry paper strength enhancer (Arakawa Chemical Industry Co., Ltd., Polystron 11)
7) 0.2%, cationized starch (Oji National Co.,
CATO-15) 1.0%, alkyl ketene dimer sizing agent (manufactured by Arakawa Chemical Industry Co., Ltd., Size Pine K90)
3) 0.07% and 0.4% of wet paper strength enhancer (Kaimen 557H, manufactured by DIC Hercules Co., Ltd.) were added with good stirring to obtain a papermaking raw material having a pulp concentration of 0.5%.
【0038】得られた抄紙原料を用いて、長網抄紙機で
坪量300g/m2 、マシン速度25m/minで抄紙
し、水分58%で表面温度80℃の多筒式ドライヤーで
乾燥し水分11%にし、引き続きタブサイズ式の平底の
トレーに蓋を設けて更に全体に断熱材を施して保温をし
95℃の熱水を入れた発泡装置を通して発泡させた。次
いで表面温度105℃の多筒式ドライヤーで水分10%
に乾燥し、直径70cmの巻き取りリールに巻き取り、
低密度の発泡原紙を得た。
The papermaking material thus obtained was used to make paper with a Fourdrinier paper machine at a basis weight of 300 g / m 2 and a machine speed of 25 m / min, and was dried with a multi-cylinder dryer having a surface temperature of 80 ° C. and a water content of 58%. Then, it was made to be 11%, and subsequently, a tab-sized flat-bottom tray was provided with a lid, and a heat insulating material was further applied to the whole to keep it warm, followed by foaming through a foaming device containing hot water of 95 ° C. Next, 10% water content with a multi-cylinder dryer with a surface temperature of 105 ° C.
It is dried and wound on a take-up reel with a diameter of 70 cm.
A low density foam base paper was obtained.
【0039】ここで用いた発泡装置は8mの長さであ
り、熱水はタンクに4kg/cm2 の蒸気を吹き込んで
98℃の熱水を製造しトレーに供給した。熱水は一部循
環使用した。その後、JISに従い、坪量、厚さ、密度
を測定し、また、発泡むらの有無を目視で評価した。
The foaming apparatus used here had a length of 8 m, and hot water was produced by blowing 4 kg / cm 2 of steam into a tank to produce hot water at 98 ° C. and supplying it to the tray. Part of the hot water was circulated. Then, according to JIS, the basis weight, the thickness, and the density were measured, and the presence or absence of uneven foaming was visually evaluated.
【0040】実施例2 熱水の温度を90℃にした以外は実施例1と同じ抄紙原
料、装置を用いて坪量302g/m2 のシートを抄紙し
た。
Example 2 A sheet having a basis weight of 302 g / m 2 was made using the same papermaking material and apparatus as in Example 1 except that the temperature of hot water was 90 ° C.
【0041】比較例1 熱水の温度を80℃にした以外は実施例1と同じ抄紙原
料、装置を用いて坪量302g/m2 のシートを抄紙し
た。
Comparative Example 1 A sheet having a basis weight of 302 g / m 2 was made using the same papermaking raw material and apparatus as in Example 1 except that the temperature of hot water was 80 ° C.
【0042】比較例2 実施例1と同じ抄紙原料を用い、長網抄紙機で坪量30
1g/m2 、水分58%でマシン速度25m/minで
抄紙し、表面温度120℃の多筒式ドライヤーで発泡お
よび乾燥しタブサイズ式の発泡装置は使用しないで水分
8%にした発泡原紙を抄紙した。
Comparative Example 2 The same papermaking raw material as in Example 1 was used, and the basis weight was 30 using a Fourdrinier paper machine.
Foaming base paper with 1 g / m 2 and 58% water content at a machine speed of 25 m / min, foamed and dried with a multi-cylinder dryer with a surface temperature of 120 ° C., and a 8% water content without using a tab size foaming device. Paper was made.
【0043】実施例3 パルプの配合をLBKP70%、NBKP30%とした
以外は実施例1と同じ抄紙原料、装置を用いて、坪量5
2g/m2のシートを抄紙した。 実施例4 実施例1と同じ抄紙原料を用い、長網抄紙機で坪量30
0g/m2、マシン速度25m/minで抄紙し、水分
58%で表面温度75℃の多筒式ドライヤーで発泡させ
ないように乾燥し、水分10%にした未発泡原紙を抄紙
した。その後オフラインの含浸装置で発泡乾燥した。す
なわち、5mの長さのタブサイズ方式の含浸部を実施例
1と同様の熱水方式の発泡装置として95℃の熱水で発
泡させ、送風乾燥機で10m/minで水分10%に乾
燥させた。
Example 3 Using the same papermaking raw material and apparatus as in Example 1 except that the pulp content was LBKP 70% and NBKP 30%, the basis weight was 5
A 2 g / m 2 sheet was made into paper. Example 4 The same papermaking raw material as in Example 1 was used, and the basis weight was 30 using a Fourdrinier paper machine.
Paper was made at 0 g / m 2 and a machine speed of 25 m / min, dried with a multi-cylinder dryer having a water content of 58% and a surface temperature of 75 ° C. so as not to foam, and an unfoamed base paper having a water content of 10% was made. After that, foaming and drying were performed in an off-line impregnation device. That is, a 5 m long tab size impregnation part was foamed with hot water of 95 ° C. as a hot water foaming device similar to that of Example 1, and dried with a blow dryer at 10 m / min to a water content of 10%. It was
【0044】以上の結果を表−1に示す。The above results are shown in Table 1.
【0045】[0045]
【表−1】 [Table-1]
【0046】[0046]
【発明の効果】以上の実施例の結果から判るように、本
発明の製造方法により主としてパルプと、加熱により体
積が10〜100倍に増加する液体を芯物質とする発泡
性カプセルから成る原紙を加熱により発泡させて嵩高紙
を製造する方法において、上記原紙を90℃以上の高温
水に接触させ、原紙中のカプセルを発泡させることによ
り0.05〜0.3g/cm3 の低密度の紙が得られ
た。
As can be seen from the results of the above examples, according to the production method of the present invention, a base paper mainly composed of pulp and a foamable capsule whose core substance is a liquid whose volume is increased 10 to 100 times by heating is prepared. In the method for producing bulky paper by foaming by heating, the base paper is brought into contact with high temperature water of 90 ° C. or higher to foam the capsules in the base paper to obtain a low density paper of 0.05 to 0.3 g / cm 3. was gotten.
【0047】加熱発泡性粒子を内添した原紙を本発明の
90℃以上の高温水と接触させる方法により、均一に発
泡した密度0.05〜0.3g/cm3の低密度の嵩高
紙が得られた。
By the method of contacting the base paper internally containing the heat-expandable particles with the high temperature water of 90 ° C. or higher according to the present invention, a uniformly expanded low density bulky paper having a density of 0.05 to 0.3 g / cm 3 can be obtained. Was obtained.
【0048】このような特徴を備えた発泡性原紙は天然
素材を主体とするところから、発泡ポリスチレンのよう
に焼却において多量の煤を発生することもないし臭いも
ほとんど発生せず、また、発泡ポリスチレンの様に多量
の熱量を発生して炉を痛めることもなく優れた低密度発
泡紙を得ることができる。
Since the expandable base paper having such characteristics is mainly composed of natural materials, it does not generate a large amount of soot or almost no odor when incinerated like expanded polystyrene, and it does not generate much odor. As described above, an excellent low-density foamed paper can be obtained without generating a large amount of heat and damaging the furnace.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 D21H 17/37 // C08L 1:00 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location D21H 17/37 // C08L 1:00

Claims (1)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 パルプと、発泡性粒子とを抄紙して得ら
    れた原紙を加熱により発泡させて、低密度の嵩高紙を製
    造する方法において、上記原紙を90℃以上の高温水と
    接触させて発泡性粒子を発泡させ、密度が0.05〜
    0.3g/cm3の低密度の嵩高紙を得ることを特徴と
    する嵩高紙の製造方法。
    1. A method for producing a low-density bulky paper by heating a base paper obtained by making paper from pulp and expandable particles by heating to bring the base paper into contact with high-temperature water at 90 ° C. or higher. To expand the expandable particles, the density is 0.05 ~
    A method for producing bulky paper, which comprises obtaining bulky paper having a low density of 0.3 g / cm 3 .
JP3024192A 1992-02-18 1992-02-18 Production of bulking paper Granted JPH05230798A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3024192A JPH05230798A (en) 1992-02-18 1992-02-18 Production of bulking paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3024192A JPH05230798A (en) 1992-02-18 1992-02-18 Production of bulking paper

Publications (1)

Publication Number Publication Date
JPH05230798A true JPH05230798A (en) 1993-09-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP3024192A Granted JPH05230798A (en) 1992-02-18 1992-02-18 Production of bulking paper

Country Status (1)

Country Link
JP (1) JPH05230798A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6273995B1 (en) 1996-07-18 2001-08-14 Kao Corporation Paper bulking promoter, highly bulky pulp sheet, and process for producing the pulp sheet
US6346169B1 (en) 1998-01-13 2002-02-12 Kao Corporation Paper bulking promoter
US6565708B2 (en) 1999-12-24 2003-05-20 Kao Corporation Paper quality improver composition for papermaking
US7122098B1 (en) 1998-12-28 2006-10-17 Kao Corporation Paper quality improver for papermaking and method for producing pulp sheet
WO2007123229A1 (en) 2006-04-21 2007-11-01 Nippon Paper Industries Co., Ltd. Cellulose-base fibrous material
US7344621B2 (en) 2003-03-24 2008-03-18 Nof Corporation Paper additive composition and method for producing paper using the same
JP2008535948A (en) * 2005-03-11 2008-09-04 インターナショナル・ペーパー・カンパニー Compositions containing expandable microspheres and ionic compounds, and methods for making and using these compositions
JP2009235627A (en) * 2008-03-27 2009-10-15 Uni Charm Corp Heat expandable particle-containing bulky paper and method for producing the same
JP2010196220A (en) * 2009-02-27 2010-09-09 Mitsubishi Paper Mills Ltd Low density nonwoven fabric
EP2400054A2 (en) 2005-02-09 2011-12-28 Nippon Paper Industries Co., Ltd. A method for treating process waters by cavitation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51129468A (en) * 1975-05-07 1976-11-11 Hitachi Chemical Co Ltd Method of continuously prefoaming foaming polystyrene beads
JPS62181343A (en) * 1986-02-06 1987-08-08 Kishimoto Akira Sealant composition for lid of can

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51129468A (en) * 1975-05-07 1976-11-11 Hitachi Chemical Co Ltd Method of continuously prefoaming foaming polystyrene beads
JPS62181343A (en) * 1986-02-06 1987-08-08 Kishimoto Akira Sealant composition for lid of can

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6273995B1 (en) 1996-07-18 2001-08-14 Kao Corporation Paper bulking promoter, highly bulky pulp sheet, and process for producing the pulp sheet
US6576085B2 (en) 1998-01-13 2003-06-10 Kao Corporation Paper bulking promoter
US6346169B1 (en) 1998-01-13 2002-02-12 Kao Corporation Paper bulking promoter
US7297229B2 (en) 1998-01-13 2007-11-20 Kao Corporation Paper bulking promoter
US7122098B1 (en) 1998-12-28 2006-10-17 Kao Corporation Paper quality improver for papermaking and method for producing pulp sheet
US6565708B2 (en) 1999-12-24 2003-05-20 Kao Corporation Paper quality improver composition for papermaking
US7344621B2 (en) 2003-03-24 2008-03-18 Nof Corporation Paper additive composition and method for producing paper using the same
EP2400054A2 (en) 2005-02-09 2011-12-28 Nippon Paper Industries Co., Ltd. A method for treating process waters by cavitation
JP2008535948A (en) * 2005-03-11 2008-09-04 インターナショナル・ペーパー・カンパニー Compositions containing expandable microspheres and ionic compounds, and methods for making and using these compositions
JP2013151780A (en) * 2005-03-11 2013-08-08 Internatl Paper Co Composition containing expandable minute sphere and ionic compound, and methods for producing and using composition from expandable minute sphere and ionic compound
WO2007123229A1 (en) 2006-04-21 2007-11-01 Nippon Paper Industries Co., Ltd. Cellulose-base fibrous material
JP2009235627A (en) * 2008-03-27 2009-10-15 Uni Charm Corp Heat expandable particle-containing bulky paper and method for producing the same
JP2010196220A (en) * 2009-02-27 2010-09-09 Mitsubishi Paper Mills Ltd Low density nonwoven fabric

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