JP2689787B2 - Method for producing paper containing foam particles - Google Patents

Method for producing paper containing foam particles

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Publication number
JP2689787B2
JP2689787B2 JP3286429A JP28642991A JP2689787B2 JP 2689787 B2 JP2689787 B2 JP 2689787B2 JP 3286429 A JP3286429 A JP 3286429A JP 28642991 A JP28642991 A JP 28642991A JP 2689787 B2 JP2689787 B2 JP 2689787B2
Authority
JP
Japan
Prior art keywords
paper
sheet
foaming
pulp
density
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.)
Expired - Fee Related
Application number
JP3286429A
Other languages
Japanese (ja)
Other versions
JPH05339898A (en
Inventor
広美 上原口
二朗 三柳
恒久 重谷
Original Assignee
王子製紙株式会社
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Publication date
Application filed by 王子製紙株式会社 filed Critical 王子製紙株式会社
Priority to JP3286429A priority Critical patent/JP2689787B2/en
Publication of JPH05339898A publication Critical patent/JPH05339898A/en
Application granted granted Critical
Publication of JP2689787B2 publication Critical patent/JP2689787B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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、例えば即席麺類やお茶
等のカップ用として断熱性、保温性に優れた低密度原紙
の製造法に関し、更に詳しくはパルプに発泡体粒子を含
有したシートの製造方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 a low-density base paper having excellent heat insulating properties and heat retaining properties, for example, for cups of instant noodles, tea, etc. More specifically, it relates to a sheet containing foam particles in pulp. The present invention relates to a manufacturing method.
【0002】[0002]
【従来の技術】従来食品容器等に用いられるシートには
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
が断熱性、保温性に優れ、成型、加工性もよく、安価で
あるため大量に使用されているが、昨今の環境汚染防止
の動きから、自然に分解したり燃焼しても汚染物質や煤
煙等が出にくい紙等への転換が進められている。紙基材
にこれらの断熱機能をもたせる方法としては、独立気泡
に近い空気層を紙に与えるのが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
泡性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等が知られている。
2. Description of the Related Art Conventionally, high molecular weight polymers such as styrofoam and polyethylene have been used in large amounts in sheets used for food containers because they are excellent in heat insulation and heat retention, are easy to mold and process, and are inexpensive. However, as a result of recent efforts to prevent environmental pollution, conversion to paper and the like, which are less likely to produce pollutants and soot even when they are naturally decomposed or burned, is being promoted. As a method of giving the paper base material these heat insulating functions, it is an effective method to give an air layer close to closed cells to the paper, but as a method of giving bubbles close to closed cells to a conventional paper-like base material, Providing a coating layer containing hollow capsules, a method of applying foamable capsules and then foaming to reduce the density, a method of making the expandable capsules with pulp and foaming them on a hot roll of a papermaking machine, etc. Are known.
【0003】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、中空カプセルや発泡性カプセ
ルをパルプと混抄してカプセルを紙全体に分布させ、紙
全体を発泡状態にする方が望ましい。しかし、中空カプ
セル等をパルプと混抄する方法は、パルプと中空カプセ
ルとで比重差があり過ぎて巧く均一に抄紙する事が難し
く、余り実用的でない。すなわち、特開昭52−399
24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
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抄紙された原紙の
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低密度と比べるとまだま
だ高すぎる。
Among these, in order to obtain a foamed paper which is truly effective in heat insulation, hollow capsules and foamed foams can be obtained by applying a foaming agent to the coating layer to make only a part of the foamed state. It is desirable to mix the elastic capsules with pulp to distribute the capsules throughout the paper and to make the entire paper in a foamed state. However, the method of mixing hollow capsules and the like with pulp is not very practical because the difference in specific gravity between the pulp and the hollow capsules makes it difficult to make paper evenly and skillfully. That is, JP-A-52-399
Japanese Unexamined Patent Publication No. 24 discloses a method for producing bulky paper by adding shirasu balloon at the time of papermaking, but it has a problem that it is difficult to make paper because it floats on water because of its low specific gravity. Also, as can be seen from the table shown in the example, the density of the base paper produced is 0.37 to 0.67 g / cm 3 , which is still too high as compared with our target low density of expanded polystyrene. .
【0004】一方、特昭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が示されてい
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。また、発泡性カプセルを使用する方法は、例え
ば特開昭63−173686号公報に感熱紙の原紙を製
造する例が知られているが、この方法では発泡された原
紙の密度は0.5g/cm程度にしか低下せず、本発
明が目的とする有効な断熱性やクッション性を得るには
まだ発泡度が不十分であることが判った。
On the other hand, although especially publicly Sho 47-24263 Patent Publication has been shown how to混抄the fibers expandable plastic, and plastic 30g pulp 6g As can be seen from the examples 1, which is expandable It is an invention mainly based on plastics, which is different from the sheet we mainly aim at paper. As a method of using a foamable capsule, an example of producing a base paper for thermal paper is known in, for example, Japanese Patent Laid-Open No. 173686/1988. In this method, the density of the foamed base paper is 0.5 g / not reduced only to approximately cm 3, the present invention has found that still foaming degree to achieve effective heat insulation and cushioning property of interest is insufficient.
【0005】また、断熱材料として一般に使用されてい
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、上記発泡性カプセルを含有する密度0.
5g/cm3紙の熱伝導性は0.07w/m/kと非
常に大きくて、断熱材としてはまだ不十分であることが
判った。
[0005] Styrofoam, which is generally used as a heat insulating material, has a small thermal conductivity of about 0.045 w / m / k, but has a density of 0.
It was found that the thermal conductivity of 5 g / cm 3 paper was 0.07 w / m / k, which was extremely high, and was still insufficient as a heat insulating material.
【0006】[0006]
【発明が解決しようとしている課題】本発明の目的は、
液体を芯物質とする発泡性粒子を配合して抄紙したシー
トを加熱発泡させることにより、密度が0.1〜0.3
g/cm3の断熱性に優れ、またクッション性のある紙
を製造する方法を提供することである。
SUMMARY OF THE INVENTION The object of the present invention is to
The density is 0.1 to 0.3 by heat-foaming a sheet made by mixing expandable particles containing a liquid as a core substance.
An object of the present invention is to provide a method for producing paper having excellent heat insulating properties of g / cm 3 and cushioning properties.
【0007】[0007]
【課題を解決する為の手段】本発明は、パルプに発泡性
粒子を配合して抄紙したシートを加熱により発泡させ
て、低密度の嵩高な紙を製造する方法において、上記シ
ートの加熱発泡前の水分量が65〜72%の状態で加熱
発泡させ、密度が0.1〜0.3g/cm3の均一な嵩
高な紙を得る事が可能になった。本発明者等は、発泡前
のシートに必要な熱を均一に与える事に着眼し鋭意検討
した結果、加熱発泡する前のシートの水分量を、一般の
抄紙の場合の乾燥時のシート水分量より相当量多くして
ドライヤーに送ることにより、均一発泡性に優れたシー
トを製造する事ができることが判った。一般に抄紙にお
いては、ドライヤー乾燥前の水分はできるだけ低くする
のが通常であり、例えば60%以下にするのが普通であ
る。しかし、この水分を65〜72%にすると、良好な
発泡が得られることがわかった。また、このような高水
分域においてはパルプ間の結合が完全ではないので、発
泡体の膨張を妨げることが少なく、またパルプ繊維が移
動できるために発泡が充分に行われると思われる。
Means for Solving the Problems The present invention is a method for producing a low-density bulky paper by heating a sheet formed by mixing foamable particles into pulp to make a paper, and heating the sheet before heating and foaming. It is possible to obtain a uniform and bulky paper having a density of 0.1 to 0.3 g / cm 3 by heating and foaming the water with a water content of 65 to 72%. The present inventors, as a result of diligent study focusing on uniformly applying the necessary heat to the sheet before foaming, the moisture content of the sheet before heat foaming, the sheet moisture content at the time of drying in the case of general papermaking. It was found that it is possible to produce a sheet having excellent uniform foaming property by adding a considerably large amount to a dryer. Generally, in papermaking, the water content before drying with a dryer is usually as low as possible, for example, 60% or less. However, it was found that good foaming was obtained when the water content was 65 to 72%. Further, in such a high moisture region, the bond between the pulps is not perfect, so that the expansion of the foam is less hindered, and the pulp fibers can move, so that it is considered that the foaming is sufficiently performed.
【0008】本発明のシートを発泡させる製造方法とし
ては、シートの水分量を所定量に調整後にドライヤーマ
シーン上で乾燥と同時に発泡を行う方法と、シートを一
旦発泡性粒子の発泡温度以下の温度で乾燥を行い、その
後再び含水させて水分量を所定量に調整した後加熱処理
を行う二通りの方法が可能である。
The production method for foaming the sheet of the present invention includes a method in which the water content of the sheet is adjusted to a predetermined amount and then foaming is performed simultaneously with drying on a dryer machine, and a temperature of the sheet is once below the foaming temperature of the expandable particles. It is possible to use two methods in which the material is dried at 1, the water content is re-hydrated to adjust the water content to a predetermined value, and then the heat treatment is performed.
【0009】本発明に使用されるパルプとしては、通常
の製紙で使用されるものの何れもが使用可能である。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重量
%以上配合した方がシートの地合、強度において優れて
いる。
As the pulp used in the present invention, any pulp used in ordinary papermaking can be used. Examples thereof 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, synthetic pulp made from polyethylene, polypropylene and the like, and a combination of these is used. To do.
In addition to the above pulp, it is also possible to mix various fibers such as acrylic fibers, rayon fibers, phenol fibers, polyamide fibers, organic fibers such as polyester fibers, glass fibers, carbon fibers, inorganic fibers such as alumina fibers, and the like. . However, from the viewpoint of papermaking properties, it is more excellent in the formation and strength of the sheet that the pulp is blended in an amount of 50% by weight or more.
【0010】本発明に使用する発泡性粒子は、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
プセルである。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5〜30μmの
粒子である。低沸点溶剤としてはイソブタン、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、
メタクリル酸エステル等の共重合体化ら成る熱可塑性樹
脂で包み込んだものであり、マイクロカプセルの膜ポリ
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、同時に内包されている膨張剤の蒸気圧が上昇し、
膜が押し広げられてカプセルが膨張する。熱膨張性マイ
クロカプセルは比較的低温、短時間で膨張して独立気泡
を形成し、断熱性に優れた材を提供でき、また比較的扱
い易いので、本用途には最適である。これら発泡性粒子
として、マツモトマイクロスフェアーF−30D、同F
−30GS、F−20D、F−50D、F−80D(松
本油脂製薬(株)製)、エクスパンセルWU、同DU
(スウェーデン製、販売元日本フィライト(株))が知
られているが、もちろんこれらに限定されるわけではな
い。発泡性粒子の配合量は、パルプ繊維100部に対し
て1〜40部、好ましくは3〜20部であり、1部以下
では十分な発泡が得られず、40部以上では経済性の面
からあまり適当とはいえない。
The expandable particles used in the present invention are heat-expandable microcapsules in which a low boiling point solvent is enclosed in the microcapsules. These capsules are particles having an average particle size of 5 to 30 μm which expand about 4 to 5 times in diameter and 50 to 100 times in volume when heated at a relatively low temperature of 80 to 200 ° C. for a short time. Examples of low boiling point solvents include volatile organic solvents (swelling agents) such as isobutane, pentane, petroleum ether, hexane, low boiling point halogenated hydrocarbons, and methylsilane, and vinylidene chloride, acrylonitrile, acrylates,
It is encapsulated with a thermoplastic resin such as a copolymerized methacrylic acid ester.When heated above the softening point of the membrane polymer of the microcapsule, the membrane polymer begins to soften, and at the same time the Vapor pressure rises,
The membrane expands and the capsule expands. The heat-expandable microcapsules expand at a relatively low temperature and in a short time to form closed cells, can provide a material having excellent heat insulating properties, and are relatively easy to handle. Matsumoto microspheres F-30D and F-30
-30GS, F-20D, F-50D, F-80D (Matsumoto Yushi Seiyaku Co., Ltd.), Expancel WU, DU
(Manufactured by Sweden, and sold by Nippon Philite Co., Ltd.), but are not limited to these. The compounding amount of the expandable particles is 1 to 40 parts, preferably 3 to 20 parts with respect to 100 parts of the pulp fiber. Not very appropriate.
【0011】パルプスラリーにはその他に、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、サイズ剤等が適宜選択して使用
される。具体的には、紙力増強剤、歩留まり向上剤とし
て、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、カルボキシメチ
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、塩化第一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組み合わせて使
用することができる。
In addition to the above, various anionic, nonionic, cationic or amphoteric retention aids, paper strength enhancers, sizing agents and the like are appropriately selected and used in the pulp slurry. Specifically, as a paper strength enhancer and a yield improver, polyacrylamide-based cationic, nonionic,
Anionic and amphoteric resins, polyethyleneimine and its derivatives, polyethylene oxide, polyamines,
Polyamide, polyamide polyamine and its derivatives,
Organic compounds such as cationic and amphoteric starch, oxidized starch, carboxymethylated starch, plant gum, polyvinyl alcohol, urea formalin resin, melamine formalin resin, hydrophilic polymer particles, and sulfuric acid band, alumina sol, basic aluminum sulfate, Aluminum compounds such as basic aluminum chloride and basic polyaluminum hydroxide,
Further, inorganic compounds such as ferrous sulfate, ferrous chloride or colloidal silica and bentonite can be used in combination.
【0012】サイズ剤としては、酸性抄紙用にロジン系
サイズ剤、石油樹脂系サイズ剤、中性抄紙用にアルキル
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。
Examples of sizing agents include rosin-based sizing agents, petroleum resin-based sizing agents for acidic papermaking, alkylketene dimer-based sizing agents, alkenyl succinic anhydride-based sizing agents for neutral papermaking. You can
【0013】これら以外には、一般には公知であるが填
料も混合することが出来る。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が挙げられる。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使用でき
る。
In addition to these, a filler, which is generally known, can be mixed. For example, talc, kaolin,
Calcined kaolin, clay, diatomaceous earth, heavy calcium carbonate, magnesium carbonate, aluminum hydroxide, titanium dioxide, magnesium sulfate, silica, aluminosilicate, bentonite and other mineral fillers, polystyrene particles, urea formalin resin particles, etc. Examples include fillers. Further, a papermaking additive such as a dye, a pH adjuster, a slime control agent, a defoaming agent, and a sticky agent can be used depending on the application.
【0014】また、本発明の発泡体粒子を含有する紙に
サイズプレス、ゲートロール等の塗工方法にてシート表
面に澱粉、ポリビニルアルコール、表面サイズ剤、顔料
等を塗布することも可能である。以上の構成原料を主原
料として用いて抄紙するが、目標とする坪量は25〜4
00g/m2の範囲で適宜選択する。
It is also possible to coat the sheet containing the foam particles of the present invention with starch, polyvinyl alcohol, a surface sizing agent, a pigment or the like on the sheet surface by a coating method such as a size press or a gate roll. . Papermaking is performed using the above constituent materials as main materials, and the target basis weight is 25 to 4
It is appropriately selected within the range of 00 g / m 2 .
【0015】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
ートにより脱水する。通常は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
が、本発明ではシート全体に均一に熱を与える為に、緩
めにプレスして水分量を65〜72%に調整する。72
%を越えると、シートの乾燥に時間がかかりすぎて適当
ではない。このように、65〜72%と高水分にするこ
とは抄紙の常識からははずれているが、ここでの目的で
あるシートを均一に発泡させる為に必須である。その
後、ドライヤーパートにシートを送って乾燥処理を施し
発泡させるが、その温度としてはマイクロカプセルの最
高発泡温度±30℃の範囲にあることが好ましい。例え
ば、マツモトマイクロスフェアーF−30Dでは、13
0±30℃にあることが好ましく、特に110〜140
℃にあることが望ましい。
First, as the first manufacturing method of the present invention,
After forming a sheet in the wire part of the papermaking process, dewatering is performed in the press part. Usually, in order to facilitate subsequent drying, the water content is reduced to about 60% of that of the base paper, but in the present invention, in order to uniformly apply heat to the entire sheet, the water content is reduced by pressing loosely. Adjust to 65-72%. 72
%, It takes too much time to dry the sheet, which is not suitable. Although making the water content as high as 65 to 72% is not the common sense of papermaking, it is essential to uniformly foam the sheet, which is the object of the present invention. Thereafter, the sheet is sent to a dryer part to be dried and foamed. The temperature is preferably in the range of the maximum foaming temperature of the microcapsules ± 30 ° C. For example, in Matsumoto Microsphere F-30D, 13
It is preferably at 0 ± 30 ° C., particularly 110-140
Desirably, it is in ° C.
【0016】本発明の第二の製造方法としては、まず抄
紙工程のワイヤーパートでシート化した後、プレスパー
トで通常の60%前後の水分までできるだけ脱水し、そ
の後発泡剤を発泡させない温度範囲で乾燥し、未発泡原
紙を製造する。このときの水分は、50〜5%の範囲に
あれば製造上問題はない。
In the second production method of the present invention, first, the sheet is formed in the wire part of the papermaking process, then dehydrated as much as possible to about 60% of the normal water content in the press part, and then in a temperature range where the foaming agent is not foamed. Dry to produce unfoamed base paper. If the water content at this time is in the range of 50 to 5%, there is no problem in production.
【0017】次いで、再び水分をこの未発泡原紙に与え
て65〜72%に調整した後、発泡させるためにドライ
ヤーで乾燥することにより得られる。この方法で、未発
泡原紙を製造するためのドライヤーまたは熱風乾燥機の
温度としては、発泡剤の最高発泡温度より40℃以上低
いことが好ましく、発泡原紙を製造するドライヤーとし
ては、第一の方法の最高発泡温度±30℃にあることが
好ましい。例えばF−30Dを使用するときは、未発泡
原紙製造には80℃以下、発泡原紙製造には130±3
0℃にあることが望ましい。
Then, water is again applied to the unfoamed base paper to adjust the content to 65 to 72%, and then dried by a dryer for foaming. In this method, the temperature of the dryer or the hot air dryer for producing the unfoamed base paper is preferably 40 ° C. or more lower than the maximum foaming temperature of the foaming agent, and as the dryer for producing the foamed base paper, the first method is used. It is preferable that the maximum foaming temperature of is ± 30 ° C. For example, when F-30D is used, the temperature is 80 ° C. or lower for producing unfoamed base paper, and 130 ± 3 for production of foamed base paper.
It is preferably at 0 ° C.
【0018】この第二の製造方法は、抄紙する抄紙機の
速度が速かったり、最高温度があまり高くできない場合
に好ましく、ここで挙げる発泡原紙製造用には、ヤンキ
ードライヤー等の低速だがドライヤー温度を高くし易い
抄紙機を利用したり、また、発泡原紙にしわが入りにく
いように通紙ラインを工夫したものを使用できる等の利
点があり、有用である。いずれにしても、本発明の密度
が0.1〜0.3g/cm3である低密度な発泡原紙を
有効に製造するには、発泡用ドライヤーに入る原紙の水
分を65〜72%と、通常より高くすることが必要であ
ることがわかった。
This second manufacturing method is preferable when the speed of the paper machine for papermaking is high or the maximum temperature cannot be made too high. For the production of the foamed base paper mentioned here, a low temperature such as a Yankee dryer but a dryer temperature is used. This is useful because it has the advantages of using a paper machine that is easy to raise, and using a paper feed line that is designed so that foamed base paper does not easily wrinkle. In any case, in order to effectively produce a low-density foam base paper having a density of 0.1 to 0.3 g / cm 3 of the present invention, the moisture of the base paper entering the foaming dryer is 65 to 72%, It turns out that it is necessary to be higher than usual.
【0019】[0019]
【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%及び部数はすべて
重量%、部数を示す。
EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should be understood that the present invention is by no means restricted thereto. In the following, all percentages and parts are weight% and parts.
【0020】実施例1 カナダ標準濾水度(CSF)450ml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)470mlに叩解した針葉樹晒パルプ(NBK
P)20%とから成るパルプ(100部)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−30
D、粒子径10〜20μm、最高発泡温度130℃)1
0部、乾燥紙力増強剤(荒川化学工業(株)製、ポリス
トロン117)0.2部、カチオン化澱粉(王子ナショ
ナル社製、CATO−15)1.0部、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K903)0.03部、湿潤紙力増強剤(DICハ
ーキュレス社製、カイメン557H)0.4部をよく撹
拌しながら添加し、パルプ濃度0.03%、PH7.3
に調整し、抄紙原料とした。得られた抄紙原料を用い
て、常法に従って角型手抄きシートマシーン(80メッ
シュ)により坪量300g/m2の紙を抄紙し、3kg
/cm2で1分間プレスした後、濾紙ではさんで5kg
のクーチロールをころがし、濾紙枚数とロール使用回数
を変えることにより水分量を66%に調整した。その
後、表面温度140〜150℃のロータリードライヤー
((株)エフシー製作所製、速度0.36cm/s)で
表裏2回通しの乾燥処理を行い、シートを得た。その
後、JISに従い、坪量、厚さ、密度を測定し、また、
発泡むらの有無を見た目で評価した。
Example 1 80% hardwood bleached pulp (LBKP) beaten to 450 ml Canadian standard freeness (CSF) and Canadian standard freeness (C)
SF) Softwood bleached pulp (NBK) beaten to 470 ml
P) 20% pulp (100 parts) dispersed in a pulp slurry, and expandable microcapsule particles (Matsumoto Yushi-Seiyaku Co., Ltd., Matsumoto Microsphere F-30).
D, particle diameter 10-20 μm, maximum foaming temperature 130 ° C.) 1
0 part, dry paper strength agent (Arakawa Chemical Industry Co., Ltd., Polystron 117) 0.2 part, cationized starch (Oji National Co., CATO-15) 1.0 part, alkyl ketene dimer type sizing agent (Arakawa Chemical Industry Co., Ltd., Size Pine K903) 0.03 part, and wet paper strength enhancer (DIC Hercules Co., Ltd., Kamen 557H) 0.4 part were added with good stirring, and the pulp concentration was 0.03%. , PH7.3
Was adjusted to be the raw material for papermaking. Using the obtained papermaking raw material, a square type papermaking machine (80 mesh) was used to make a paper having a basis weight of 300 g / m 2 according to a conventional method, and 3 kg was produced.
After pressing for 1 minute at / cm 2 , 5kg with filter paper
The water content was adjusted to 66% by rolling the couch roll and changing the number of filter papers and the number of times the roll was used. Thereafter, the sheet was dried twice on the front and back sides with a rotary drier having a surface temperature of 140 to 150 ° C. (manufactured by FCS Corporation, speed 0.36 cm / s) to obtain a sheet. After that, according to JIS, the basis weight, thickness, and density were measured.
The presence or absence of uneven foaming was evaluated by visual inspection.
【0021】実施例2 プレス後に、挟む濾紙の枚数を変えてクーチロールによ
り水分量を70%に調整した以外は、実施例1と同様の
手順で発泡紙を作成し、物性を測定した。
Example 2 After pressing, a foamed paper was prepared and physical properties were measured in the same procedure as in Example 1 except that the number of filter papers sandwiched was changed and the water content was adjusted to 70% by the couch roll.
【0022】比較例1 プレス後に、挟む濾紙の枚数を変えてクーチロールによ
り水分量を60%に調整した以外は、実施例1と同様の
手順で発泡紙を作成し、物性を測定した。
Comparative Example 1 Foamed paper was prepared and physical properties were measured by the same procedure as in Example 1 except that after pressing, the number of filter papers sandwiched was changed and the water content was adjusted to 60% by the couch roll.
【0023】比較例2 プレス後に、挟む濾紙の枚数を変えてクーチロールによ
り水分量を75%に調整したことと、乾燥させる為に表
裏2回ずつドライヤーに通したこと以外は、実施例1と
同様の手順で発泡紙を作成し、物性を測定した。
Comparative Example 2 Same as Example 1 except that after pressing, the number of filter papers to be sandwiched was changed to adjust the water content to 75% with a couch roll, and that the paper was passed through a dryer twice for the front and back for drying. Foamed paper was prepared by the procedure of 1 and the physical properties were measured.
【0024】実施例3 坪量を200g/m2にした以外、実施例1と同様の手
順で発泡紙を作成し、物性を測定した。
Example 3 Foamed paper was prepared in the same procedure as in Example 1 except that the basis weight was set to 200 g / m 2 , and the physical properties were measured.
【0025】実施例4 坪量を100g/m2にし、ドライヤーに1回通して乾
燥処理をした以外、実施例1と同様の手順で発泡紙を作
成し、物性を測定した。
Example 4 Foamed paper was prepared by the same procedure as in Example 1 except that the basis weight was set to 100 g / m 2 and drying was carried out by passing it once through a dryer, and the physical properties were measured.
【0026】実施例5 坪量100g/m2にし、添加する発泡剤をF−20D
(松本油脂製薬(株)製、マツモトマイクロスフェアー
F−20D、粒子径10〜20μm、最高発泡温度12
0℃)に変えた以外、実施例1と同様の手順で発泡紙を
作成し、物性を測定した。
Example 5 The basis weight was 100 g / m 2 , and the blowing agent added was F- 20D.
(Matsumoto Yushi-Seiyaku Co., Ltd., Matsumoto Microsphere F- 20D , particle diameter 10 to 20 μm, maximum foaming temperature 12
Foamed paper was prepared in the same procedure as in Example 1 except that the temperature was changed to 0 ° C.), and the physical properties were measured.
【0027】実施例6 坪量を100g/m2にし、発泡剤の添加量を5部にし
た以外、実施例1と同様の手順で発泡紙を作成し、物性
を測定した。
Example 6 Foamed paper was prepared in the same procedure as in Example 1 except that the basis weight was 100 g / m 2 and the amount of the foaming agent added was 5 parts, and the physical properties were measured.
【0028】実施例7 坪量を100g/m2にし、発泡剤の添加量を15部に
した以外、実施例1と同様の手順で発泡紙を作成し、物
性を測定した。
Example 7 Foamed paper was prepared in the same procedure as in Example 1 except that the basis weight was 100 g / m 2 and the amount of the foaming agent added was 15 parts, and the physical properties were measured.
【0029】実施例8 坪量を100g/m2にし、発泡剤の添加量を20部に
した以外、実施例1と同様の手順で発泡紙を作成し、物
性を測定した。
Example 8 Foamed paper was prepared in the same manner as in Example 1 except that the basis weight was 100 g / m 2 and the amount of the foaming agent added was 20 parts, and the physical properties were measured.
【0030】これらの結果を表1に示す。The results are shown in Table 1.
【表1】 表1から明かなように、水分量が65%以下であれば、
厚みがまだ不十分であり、密度も高すぎる。また、発泡
むらがひどく、均一なシートが得られない。水分量が7
5%以上である場合、厚さや密度に関しては充分である
が、多数回ドライヤー通しを行わなければ乾燥が出来
ず、そのために発泡むらも起こり易くなる。よって、水
分量に関しては、65〜72%の範囲が適当であると言
える。また、実施例4および6、7、8、で発泡剤の添
加濃度による違いが示されており、発泡剤を多く添加す
るほど厚みもでて密度も低くなっている。
[Table 1] As is clear from Table 1, if the water content is 65% or less,
The thickness is still insufficient and the density is too high. Further, the unevenness of foaming is severe, and a uniform sheet cannot be obtained. Water content is 7
When it is 5% or more, the thickness and the density are sufficient, but it cannot be dried unless it is passed through a large number of dryers, so that uneven foaming easily occurs. Therefore, it can be said that the range of 65 to 72% is appropriate for the water content. Further, in Examples 4 and 6, 7 and 8, the difference depending on the addition concentration of the foaming agent is shown, and the more the foaming agent is added, the thicker and the lower the density becomes.
【0031】実施例9 実施例1と同様にプレス後の水分量を調整後、表面温度
を80℃前後に落としたロータリードライヤーで水分を
乾燥した未発泡原紙を作成し、その後再び含水させて水
分を69%にし、表面温度140℃のロータリードライ
ヤーで発泡乾燥処理を行った。得られたシートについ
て、JISに従って坪量、厚さ、密度を測定し、発泡む
らの有無を見た目で評価した。
Example 9 After adjusting the water content after pressing in the same manner as in Example 1, an unfoamed base paper was prepared by drying the water content with a rotary dryer with the surface temperature lowered to around 80 ° C., and then rehydrated to contain the water content. To 69% and subjected to foaming and drying treatment with a rotary dryer having a surface temperature of 140 ° C. The obtained sheet was measured for basis weight, thickness, and density according to JIS, and evaluated by visual inspection for the presence or absence of uneven foaming.
【0032】比較例3 再含水後の水分量を60%にした以外、実施例9と同様
の処理を行って、発泡原紙を作成した。
Comparative Example 3 A foamed base paper was prepared in the same manner as in Example 9 except that the water content after rehydration was set to 60%.
【0033】これらの結果を表2に示す。The results are shown in Table 2.
【表2】 表2では、実施例、比較例ともに密度は0.1〜0.3
g/cm3の範囲にあるが、出来上がったシートが比較
例の場合発泡むらが多く、充分に熱が伝わらなかったも
のと考えられる。すなわち、未発泡原紙から作製する場
合も、水分量は65〜72%の範囲内にあることが重要
である。以上の結果からも明らかなように、本発明によ
り、発泡剤粒子混抄紙の発泡性を著しく向上させること
ができた。
[Table 2] In Table 2, the density is 0.1 to 0.3 in both the examples and the comparative examples.
Although it is in the range of g / cm 3 , it is considered that the finished sheet had a large amount of uneven foaming in the case of the comparative example, and the heat was not sufficiently transmitted. That is, even when made from unfoamed base paper, it is important that the water content be in the range of 65 to 72%. As is clear from the above results, according to the present invention, the foamability of the paper mixed with the foaming agent particles can be remarkably improved.
【0034】[0034]
【発明の効果】本発明によれば、シートのプレス後の水
分量を65〜72%に調整した後で乾燥工程に送ること
により、シート内に均一に熱を伝えることが可能となる
ので、シート中に混抄された発泡体粒子が均一に独立気
泡を形成し、従来品より低密度で断熱性に優れた発泡体
混抄紙が作成できる。
According to the present invention, since the moisture content after pressing the sheet is adjusted to 65 to 72% and then sent to the drying step, it is possible to uniformly transfer heat to the sheet. The foam particles mixed and formed in the sheet uniformly form closed cells, and a foam- mixed paper having a lower density and excellent heat insulating properties than conventional products can be prepared.

Claims (1)

    (57)【特許請求の範囲】(57) [Claims]
  1. 【請求項1】 パルプに発泡性粒子を配合して抄紙した
    シートを、加熱により発泡させて、低密度の嵩高な紙を
    製造する方法において、上記シートの加熱発泡前の水分
    量が65〜72%の状態で発泡性粒子を加熱発泡させ、
    密度が0.1〜0.3g/cm 3 の均一な嵩高な紙を得
    る事を特徴とする発泡体粒子を含有する紙の製造方法。
    1. A method for producing a low-density bulky paper by heating a sheet made of pulp by mixing expandable particles into paper to produce a low-density bulky paper, wherein the moisture content of the sheet before heat-expanding is 65 to 72. In the state of%, heat the foamable particles to foam,
    A method for producing a paper containing foam particles, which comprises obtaining a uniform bulky paper having a density of 0.1 to 0.3 g / cm 3 .
JP3286429A 1991-10-31 1991-10-31 Method for producing paper containing foam particles Expired - Fee Related JP2689787B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3286429A JP2689787B2 (en) 1991-10-31 1991-10-31 Method for producing paper containing foam particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3286429A JP2689787B2 (en) 1991-10-31 1991-10-31 Method for producing paper containing foam particles

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP9126237A Division JP3024591B2 (en) 1997-05-01 1997-05-01 Foam particle mixed paper

Publications (2)

Publication Number Publication Date
JPH05339898A JPH05339898A (en) 1993-12-21
JP2689787B2 true JP2689787B2 (en) 1997-12-10

Family

ID=17704276

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7956096B2 (en) 2006-02-10 2011-06-07 Akzo Nobel N.V. Microspheres
US8013041B2 (en) 2006-12-01 2011-09-06 Akzo Nobel N.V. Cellulosic product
US8388809B2 (en) 2006-02-10 2013-03-05 Akzo Nobel N.V. Microspheres

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JPH0610300A (en) * 1992-02-14 1994-01-18 Sony Corp Pulp mold material
JPH10212690A (en) * 1997-01-23 1998-08-11 Oji Paper Co Ltd Low-density body
JP4665310B2 (en) * 2000-03-06 2011-04-06 凸版印刷株式会社 Manufacturing method for paper containers
JP4582273B2 (en) * 2000-11-14 2010-11-17 凸版印刷株式会社 Paper container
JP4616228B2 (en) * 2006-09-29 2011-01-19 大王製紙株式会社 Multilayer paperboard
JP5269485B2 (en) 2008-05-30 2013-08-21 ユニ・チャーム株式会社 Bulky paper having an uneven pattern and method for producing the same
JP5269486B2 (en) 2008-05-30 2013-08-21 ユニ・チャーム株式会社 Bulky paper having an uneven pattern and method for producing the same
JP5752078B2 (en) 2012-03-30 2015-07-22 ユニ・チャーム株式会社 Nonwoven fabric and method for producing nonwoven fabric

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Publication number Priority date Publication date Assignee Title
US7956096B2 (en) 2006-02-10 2011-06-07 Akzo Nobel N.V. Microspheres
US8388809B2 (en) 2006-02-10 2013-03-05 Akzo Nobel N.V. Microspheres
US9062170B2 (en) 2006-02-10 2015-06-23 Akzo Nobel N.V. Microspheres
US8013041B2 (en) 2006-12-01 2011-09-06 Akzo Nobel N.V. Cellulosic product

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