JPH0457798B2 - - Google Patents
Info
- Publication number
- JPH0457798B2 JPH0457798B2 JP63235735A JP23573588A JPH0457798B2 JP H0457798 B2 JPH0457798 B2 JP H0457798B2 JP 63235735 A JP63235735 A JP 63235735A JP 23573588 A JP23573588 A JP 23573588A JP H0457798 B2 JPH0457798 B2 JP H0457798B2
- Authority
- JP
- Japan
- Prior art keywords
- paper
- pulp
- pulp fibers
- base paper
- starch
- 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 - Lifetime
Links
- 229920002472 Starch Polymers 0.000 claims description 41
- 235000019698 starch Nutrition 0.000 claims description 41
- 239000008107 starch Substances 0.000 claims description 39
- 239000000835 fiber Substances 0.000 claims description 38
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 6
- 229920002050 silicone resin Polymers 0.000 claims description 5
- 229920003169 water-soluble polymer Polymers 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims 1
- 239000000123 paper Substances 0.000 description 71
- 239000007788 liquid Substances 0.000 description 22
- 230000035699 permeability Effects 0.000 description 22
- 238000000034 method Methods 0.000 description 14
- 238000003490 calendering Methods 0.000 description 12
- 238000001035 drying Methods 0.000 description 9
- 239000008187 granular material Substances 0.000 description 8
- 238000010009 beating Methods 0.000 description 7
- 229920001296 polysiloxane Polymers 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 239000011086 glassine Substances 0.000 description 4
- 239000004447 silicone coating Substances 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- 229920000881 Modified starch Polymers 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000019426 modified starch Nutrition 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 240000003183 Manihot esculenta Species 0.000 description 1
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008395 clarifying agent Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000013305 flexible fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Paper (AREA)
Description
（産業上の利用分野）
本発明は、シリコーン樹脂塗工液等の液体の浸
透性（液浸透性）を著しく低下させた剥離紙用原
紙、その製造方法及び該剥離紙用原紙を用いて製
造した剥離紙に関する。
（従来の技術及びその解決すべき課題）
従来から、グラシン紙などが剥離紙用原紙とし
て用いられてきた。このグラシン紙などは、パル
プ繊維による空〓が多い構造をしているため、塗
工液等の液浸透性が大きい。一方、剥離紙を製造
する場合には、剥離性を向上させるために紙にシ
リコーン塗工液を塗布するが、空〓が多いグラシ
ン紙ではシリコーン塗工液が浸透してしまい、剥
離性が不十分となり、その塗工量を多くすれば、
価格面で不利となり、また、液浸透性を低下させ
るため、グラシン紙表面にポリエチレン等をラミ
ネートすれば、製造工程が増える等の問題があつ
た。
そのため、従来から空〓が少なく、製造の簡単
な紙が強く要望されていた。
ところで、パルプ繊維間の空〓率を低下させる
方法として、従来より以下のような各種方法が採
られている。
(1) パルプの選択：
原料パルプとして薄膜で柔軟な繊維を選択す
ることにより、空〓を減少させるもの。この場
合、広葉樹パルプよりも針葉樹パルプが使用さ
れ、クラフトパルプ（KP）よりも亜硫酸パル
プ（SP）が使用される。更に、麻パルプが使
用されることもある。しかしながら、このパル
プの選択によつても、液浸透性を著しく低下さ
せることは困難である。さらに、特殊で高価な
パルプは大幅なコストアツプを招き、SPの使
用は強度の低下を招く。また、機械パルプのよ
うな微細繊維を使用して空〓を減少させること
も行われていたが、光や熱などで褪色しやす
く、使用できるパルプの種類が限られるなど不
利な点が多い。
(2) パルプ叩解の強化：
紙を緻密にするために、強い叩解を行うも
の。これにより、パルプの柔軟化、微細繊維の
生成が促進され、結合力が高まる。しかしなが
ら、この方法によつても紙の液浸透性を低下さ
せることは困難である。また、叩解を強化すれ
ばするほど、叩解に要する動力が増大し、さら
に、叩解によるパルプの脱水性の低下で、抄造
効率が低下したり、紙の乾燥に要するエネルギ
ーが増大する等コストの上昇や生産性の低下を
伴う。
(3) カレンダリングの強化：紙の密度を高くし、
空〓を潰すために高水分、高温、高線圧、硬い
ロール材質等の条件によるカレンダリングを行
うもの。しかしながら、この方法による場合も
紙の液浸透性を低下させることは難しい。ま
た、カレンダリングは主に紙の厚み方向にのみ
作用するので、紙の水平方向の不均一性を改善
することができず、紙の地合い、厚薄むらが紙
の液浸透性のバラツキとして現れてしまうとい
う不利な点がある。
上記の方法の他に、(4)油脂類、水性エマルジヨ
ン透明化剤の塗工、及び(5)熱可塑性樹脂の使用な
どの方法があるが、これらの材料は極めて高価で
あり、用途に制限がある。更に、カレンダリング
条件の設定が困難であつたり、ロール付着等のカ
レンダリングトラブルが生ずる等不利な点があ
る。
紙の空〓率を少なくするために、前述の各方法
が採用されるが、いずれの方法も紙の空〓率を格
段に減少させるまでには到らず、コストやエネル
ギー消費の増大、生産性の低下が生じていた。
本発明者は、安価な未糊化澱粉を顆粒状で、パ
ルプ繊維に結合させることにより、空〓率を著し
く減少させることができ、そのため紙のシリコー
ン塗工液などに対する浸透性が著しく減少するこ
とを見出した。しかも、澱粉を使用することで、
コストの上昇、生産効率の低下を伴わずに空〓の
少ない紙を製造することができる。本発明は、こ
の澱粉を充填した紙に、水溶性高分子物質を塗工
すれば、極めて安価に、かつ簡単な工程で、液浸
透性が著しく低い剥離紙用原紙が得られるという
知見に基づいてなされたものである。紙に澱粉を
充填し、かつ水溶性高分子物質を塗工した場合、
特に、シリコーン樹脂塗液の浸透を防止するのに
有効である。
ところで、従来より紙の抄造に際し、パルプ繊
維スラリーに蒸煮した糊化澱粉水溶液あるいは水
溶性化工澱粉を添加することは広く一般的に行わ
れている。しかしながら、この目的はパルプ繊維
間の結合強化−紙力増強剤として、又は微細繊維
や填料の歩留まり向上剤として用いることにあ
り、紙の空〓部分を充填するものではない。これ
らの物質を使用しても、空〓の充填にはならず、
液浸透性の低下には到らない。また、繊維間の結
合補強を目的に、未糊化澱粉を使用する場合もあ
るが、いずれも抄造中での糊化を前提にして使用
するものであり、顆粒状未糊化澱粉をパルプ繊維
間に充填するものではない。
（本発明の目的）
本発明は、液浸透性が著しく低い剥離紙用原
紙、その製造方法及び該原紙を用いた剥離紙を提
供することを目的とする。
（課題を解決するための手段）
本発明は、前記課題を解決するためにパルプ繊
維間の空〓部分を充填しているとともに前記パル
プ繊維の表面に結合している未糊化顆粒澱粉を有
し、表面の少なくとも一方に、水溶性高分子物質
の塗膜を形成したことを特徴とする剥離紙用原紙
を提供する。
また、本発明は、剥離紙用原紙の製造方法であ
つて、パルプ繊維スラリーに未糊化顆粒澱粉を配
合し、この未糊化顆粒澱粉をパルプ繊維の表面に
結合させつつ、該パルプ繊維間の空〓部分に充填
されるよう抄紙し、得られた紙の表面の少なくと
も一方に、水溶性高分子物質を塗工することを特
徴とする製造方法を提供する。
さらに本発明は、前記原紙を用いて製造した剥
離紙を提供するものである。
以下、本発明について詳細に説明する。
本発明で使用する未糊化顆粒澱粉は、未糊化澱
粉が顆粒状、即ち、殻を保持したままの未糊化澱
粉をいう。この殻は実質的に未糊化澱粉を顆粒状
に存在させることができるように存在していれば
よく、部分的に殻が切断したり、欠失していても
よい。
澱粉としては、抄紙工程において顆粒で存在し
かつ繊維表面に結合するものであればどんな澱粉
でも使用することができる。コストの面から、例
えば、コーン、小麦、米、タピオカ、ジヤガイモ
ならびにこれらの加工澱粉及び澱粉誘導体を使用
することができる。
未糊化顆粒澱粉の大きさは特に重要ではない。
抄造条件に合せて、糊化温度等を考慮して種々選
択することができる。
パルプ繊維スラリー中への未糊化顆粒澱粉の配
合は、叩解前、叩解後、又はパルプ繊維の脱水の
際に行うことができる。
未糊化顆粒澱粉の配合量は１〜20重量％が好ま
しい。１重量％よりも少ない配合量の場合には、
紙の液浸透性を実際上向上させることが困難とな
り、一方、20重量％より多い場合には紙がロール
に巻きついたりして紙の製造が困難になる。
パルプ繊維スラリーに配合された未糊化澱粉は
その後乾燥、カレンダリング等の工程において顆
粒状で存在していることが重要である。もし、乾
燥工程などで澱粉が糊化した場合には液状となる
ため、パルプ繊維上に付着したりして、パルプ繊
維間の空〓部分を充填できないからである。カレ
ンダリングで糊化した場合は、カレンダに付着
し、操業が不可能になる。従つて、澱粉の選択に
当たつては、乾燥、カレンダリング等の条件で糊
化しないような澱粉を選択することにより、従来
の抄造条件を変更することなく本発明を実施する
ことができる。
以下に、いくつかの顆粒状澱粉の性質を挙げ
る。
(Industrial Application Field) The present invention relates to a base paper for release paper that has significantly reduced permeability (liquid permeability) to liquids such as silicone resin coating liquids, a method for producing the same, and a base paper produced using the base paper for release paper. Regarding the release paper. (Prior Art and Problems to Be Solved) Conventionally, glassine paper and the like have been used as base paper for release paper. This glassine paper has a structure with many voids made of pulp fibers, so it has high permeability to liquids such as coating liquids. On the other hand, when manufacturing release paper, a silicone coating liquid is applied to the paper to improve its releasability, but the silicone coating liquid permeates glassine paper, which has many pores, resulting in poor releasability. If it becomes sufficient and the amount of coating is increased,
This would be disadvantageous in terms of price, and if polyethylene or the like was laminated onto the surface of the glassine paper to reduce liquid permeability, there would be problems such as an increase in the number of manufacturing steps. For this reason, there has been a strong demand for paper that has less voids and is easy to manufacture. By the way, as a method for reducing the porosity between pulp fibers, various methods such as those described below have been conventionally employed. (1) Pulp selection: Thin, flexible fibers are selected as the raw material pulp to reduce voids. In this case, softwood pulp is used rather than hardwood pulp, and sulfite pulp (SP) is used rather than kraft pulp (KP). Additionally, hemp pulp is sometimes used. However, even with this selection of pulp, it is difficult to significantly reduce liquid permeability. Furthermore, the use of special and expensive pulp will significantly increase costs, and the use of SP will result in a decrease in strength. In addition, fine fibers such as mechanical pulp have been used to reduce voids, but these have many disadvantages, such as being easily discolored by light and heat, and limiting the types of pulp that can be used. (2) Strengthening of pulp beating: In order to make the paper dense, strong beating is performed. This promotes the softening of the pulp, the production of fine fibers, and increases the bonding strength. However, even with this method, it is difficult to reduce the liquid permeability of paper. In addition, the more the beating is strengthened, the more power is required for beating, and furthermore, the dehydration of the pulp due to beating is reduced, resulting in a decrease in papermaking efficiency and an increase in the energy required to dry the paper, which increases costs. and reduced productivity. (3) Strengthen calendering: increase the density of paper,
Calendering is performed under conditions such as high moisture, high temperature, high linear pressure, and hard roll material to collapse the void. However, even with this method, it is difficult to reduce the liquid permeability of paper. In addition, since calendering mainly acts only in the thickness direction of the paper, it cannot improve the unevenness of the paper in the horizontal direction. It has the disadvantage of being stored away. In addition to the above methods, there are methods such as (4) coating with oils and fats or water-based emulsion clarifying agents, and (5) using thermoplastic resins, but these materials are extremely expensive and have limited applications. There is. Further, there are disadvantages such as difficulty in setting calendering conditions and calendering troubles such as roll adhesion. In order to reduce the paper vacancy rate, each of the above-mentioned methods is adopted, but none of the methods reaches the point of significantly reducing the paper vacancy rate, increases cost and energy consumption, and increases production. There was a decline in sexuality. The present inventor has found that by bonding inexpensive ungelatinized starch to pulp fibers in the form of granules, the porosity can be significantly reduced, thereby significantly reducing the permeability of paper to silicone coating liquids, etc. I discovered that. Moreover, by using starch,
It is possible to produce paper with less empty space without increasing costs or decreasing production efficiency. The present invention is based on the knowledge that if paper filled with starch is coated with a water-soluble polymeric substance, a base paper for release paper with extremely low liquid permeability can be obtained at an extremely low cost and in a simple process. It was made by When paper is filled with starch and coated with a water-soluble polymer substance,
It is particularly effective in preventing penetration of silicone resin coating fluids. By the way, it has been a common practice to add a steamed gelatinized starch aqueous solution or a water-soluble modified starch to a pulp fiber slurry during paper making. However, the purpose of this is to strengthen the bonds between pulp fibers, to use it as a paper strength enhancer, or as a retention improver for fine fibers and fillers, and not to fill the empty spaces in the paper. Using these substances will not fill the void;
This does not result in a decrease in liquid permeability. In addition, ungelatinized starch is sometimes used to strengthen the bond between fibers, but in both cases, it is used with the premise of gelatinization during papermaking, and granular ungelatinized starch is used to form pulp fibers. It is not meant to be filled in between. (Objective of the present invention) An object of the present invention is to provide a base paper for release paper having extremely low liquid permeability, a method for producing the base paper, and a release paper using the base paper. (Means for Solving the Problems) In order to solve the above problems, the present invention includes ungelatinized granular starch that fills the voids between pulp fibers and is bonded to the surfaces of the pulp fibers. The present invention provides a base paper for release paper, characterized in that a coating film of a water-soluble polymer substance is formed on at least one of the surfaces. The present invention also provides a method for producing a base paper for release paper, in which ungelatinized granular starch is blended into a pulp fiber slurry, and while the ungelatinized granular starch is bonded to the surface of pulp fibers, the pulp fibers are bonded to the pulp fibers. The present invention provides a manufacturing method characterized in that paper is made so as to fill the empty portions of the paper, and at least one of the surfaces of the obtained paper is coated with a water-soluble polymeric substance. Furthermore, the present invention provides a release paper manufactured using the base paper. The present invention will be explained in detail below. The ungelatinized granular starch used in the present invention refers to ungelatinized starch in the form of granules, that is, ungelatinized starch that retains its shell. The shell may be present in such a way that substantially the ungelatinized starch can be present in the form of granules, and the shell may be partially cut or missing. Any starch can be used as long as it exists in the form of granules during the papermaking process and binds to the fiber surface. From the viewpoint of cost, for example, corn, wheat, rice, tapioca, potato, and processed starches and starch derivatives thereof can be used. The size of the ungelatinized granular starch is not particularly important.
Various selections can be made in accordance with the papermaking conditions, taking into account the gelatinization temperature, etc. The ungelatinized granular starch can be incorporated into the pulp fiber slurry before beating, after beating, or during dewatering of the pulp fibers. The amount of ungelatinized granular starch blended is preferably 1 to 20% by weight. If the amount is less than 1% by weight,
It becomes difficult to actually improve the liquid permeability of paper, and on the other hand, if it exceeds 20% by weight, the paper will wind up around rolls, making paper production difficult. It is important that the ungelatinized starch blended into the pulp fiber slurry remains in the form of granules during subsequent steps such as drying and calendering. This is because if the starch gelatinizes during the drying process, it will become liquid and will adhere to the pulp fibers, making it impossible to fill the voids between the pulp fibers. If it gelatinizes during calendering, it will adhere to the calender, making operation impossible. Therefore, when selecting starch, the present invention can be carried out without changing conventional papermaking conditions by selecting a starch that does not gelatinize under conditions such as drying and calendering. Listed below are some properties of granular starch.
【表】
このようにしてパルプ繊維スラリーに配合され
た未糊化顆粒澱粉は、脱水工程においてパルプ繊
維の交差空〓に保持される。乾燥工程の初期段階
においては、顆粒澱粉は充分な水の存在と乾燥の
ための加熱とにより膨潤顆粒となる。この膨潤顆
粒は、カレンダリング工程において加熱によるガ
ラス転移点への移行と加圧により柔軟に顆粒状態
を維持したまま変形し、その表面積を増加してパ
ルプ繊維間の空〓構造に対応した形でその空〓部
分を充填する。この際、未糊化顆粒澱粉はパルプ
繊維の表面に接着して、パルプ繊維と空〓の空気
との界面を大いに減少させる。この結果、紙に対
する液体の浸透性が大きく減少する。また、澱粉
顆粒が全体にわたつて均一に充填されるので、紙
の地合も向上し、地合むらに起因する液浸透性の
むらが減少する。
さらに、紙の液浸透性を十分に低下させるため
に、このようにして製造された紙に膜形成性物質
として水溶性高分子物質を塗工する。この水溶性
高分子物質として、例えば、PVAや糊化澱粉、
CMCを挙げることができる。これら水溶性高分
子物質の水溶液を用いて、固形分で換算して、
0.2ｇ／m2〜1.0ｇ／m2となるように塗布する。な
お、この塗布はオンマシン工程で行うのが好まし
い。
得られた剥離紙用原紙の部分拡大略図を第１図
に示す。本発明の原紙においては、図示されるよ
うにパルプ繊維間の空〓に未糊化顆粒澱粉が充填
され、しかもこの未糊化顆粒澱粉はパルプ繊維の
表面にその空〓空間に対応して結合している。
（実施例）
以下、本発明を実施例により更に詳細に説明す
る。なお、これらの実施例における不透明度及び
浸透性は以下のようにして測定した。
不透明度：フオトボルト社 リフレクシヨンメー
ターにより JIS Ｔ−8138A法に準じ測定し
た。
浸透性：Japan Tappi No.５−Ｂにより王研式
透気度試験機で測定し、透気度として評価し
た。
実施例 １
NBKP対LBKPを３対７の割合で配合したパ
ルプを、濾水度200mlになるように叩解し、該パ
ルプスラリー中に以下の表−１に示す各種未糊化
顆粒澱粉を配合し、抄紙及び乾燥を、長網式抄紙
機により通常の工業的規模を行い、米坪60ｇ／m2
の紙を抄紙した。また抄紙乾燥工程の中間でサイ
ズプレスによりPVAを片面0.5ｇ／m2で塗工し、
その乾燥した後に、カレンダリングを行つた。カ
レンダリング条件は、チルド／コツトンロール、
線圧300Kg／cm、ロール温度65℃及び120℃であつ
た。紙中の澱粉の量はTappi 419−OM−85に準
じて測定した。結果を表−１に示す。[Table] The ungelatinized granular starch thus blended into the pulp fiber slurry is retained in the intersecting voids of the pulp fibers during the dehydration process. In the early stages of the drying process, the granular starch becomes swollen granules due to the presence of sufficient water and heating for drying. During the calendering process, these swollen granules are deformed while maintaining their granular state flexibly by heating to the glass transition point and applying pressure, increasing their surface area to correspond to the void structure between pulp fibers. Fill that empty space. At this time, the ungelatinized granular starch adheres to the surface of the pulp fibers, greatly reducing the interface between the pulp fibers and the empty air. As a result, the permeability of liquid to the paper is greatly reduced. In addition, since the starch granules are uniformly filled throughout the paper, the texture of the paper is improved, and unevenness in liquid permeability caused by uneven texture is reduced. Furthermore, in order to sufficiently reduce the liquid permeability of the paper, the paper thus produced is coated with a water-soluble polymeric substance as a film-forming substance. Examples of this water-soluble polymer substance include PVA, gelatinized starch,
CMC can be mentioned. Using aqueous solutions of these water-soluble polymer substances, in terms of solid content,
Apply so that the amount is 0.2g/m 2 to 1.0g/m 2 . Note that this coating is preferably performed in an on-machine process. A partially enlarged schematic diagram of the obtained base paper for release paper is shown in FIG. In the base paper of the present invention, as shown in the figure, the spaces between the pulp fibers are filled with ungelatinized granular starch, and this ungelatinized granular starch is bonded to the surface of the pulp fibers in correspondence with the empty spaces. are doing. (Examples) Hereinafter, the present invention will be explained in more detail with reference to Examples. In addition, the opacity and permeability in these Examples were measured as follows. Opacity: Measured according to JIS T-8138A method using a reflection meter manufactured by Photovolt. Permeability: Measured with an Oken air permeability tester using Japan Tappi No. 5-B, and evaluated as air permeability. Example 1 Pulp containing NBKP and LBKP in a ratio of 3:7 was beaten to a freeness of 200 ml, and various ungelatinized granular starches shown in Table 1 below were blended into the pulp slurry. , paper making and drying were carried out on a normal industrial scale using a fourdrinier paper machine, and the paper was made to a paper size of 60 g/m 2 .
paper was made. In addition, in the middle of the paper drying process, PVA was applied on one side at 0.5g/ m2 using a size press.
After drying, calendering was performed. Calendering conditions are chilled/cotton roll,
The linear pressure was 300 kg/cm, and the roll temperatures were 65°C and 120°C. The amount of starch in the paper was measured according to Tappi 419-OM-85. The results are shown in Table-1.
【表】
実施例 ２
NBKP対LBKPを７対３の割合で配合したパ
ルプを使用したことを除いて、実施例１を繰り返
した。得られた改良紙の浸透性及び透明度のデー
タを以下の表−２に示す。Table: Example 2 Example 1 was repeated except that a pulp with a 7:3 ratio of NBKP to LBKP was used. The permeability and transparency data of the improved paper obtained are shown in Table 2 below.
【表】
実施例 ３
実施例１で得られた改良紙に、塗工量が0.60〜
0.75ｇ／m2となるようにグラビアロールで下記配
合のシリコーン樹脂溶液を塗工した。
シリコーン樹脂溶液
重量部
シリコーンKS−778（シリコーン濃度30％、信越
シリコーン(株)製） 100
硬化剤PL−７（信越シリコーン(株)製） １
塗工後、紙を直ちに乾燥帯域に通して溶剤を蒸
発させるとともに、シリコーンを硬化させ、剥離
紙を製造した。
続いて、剥離性評価のために、シリコーン面に
粘結剤（東洋インキ製、BPS−8170）を溶剤込
みで70μの厚さに塗布し、100℃で２分間乾燥し
た後、粘結剤塗工面に50ｇ／m2の上質紙（小林記
録紙製）を貼合せ、20℃、65％RHにて１日放置
した。その後、剥離抵抗を引張り強さ試験機を用
いて30cm／分の剥離速度で測定し、剥離強度とし
た（単位：ｇ／50mm）。その結果を以下の表−３
に示す。[Table] Example 3 The improved paper obtained in Example 1 was coated with a coating weight of 0.60~
A silicone resin solution having the following formulation was applied using a gravure roll to give a coating weight of 0.75 g/m 2 . Silicone resin solution Part by weight Silicone KS-778 (Silicone concentration 30%, manufactured by Shin-Etsu Silicone Co., Ltd.) 100 Curing agent PL-7 (manufactured by Shin-Etsu Silicone Co., Ltd.) 1 After coating, immediately pass the paper through a drying zone and remove the solvent. was evaporated and the silicone was cured to produce a release paper. Next, for peelability evaluation, a binder (manufactured by Toyo Ink, BPS-8170) containing a solvent was applied to the silicone surface to a thickness of 70μ, dried at 100℃ for 2 minutes, and then the binder was applied. A 50 g/m 2 high-quality paper (manufactured by Kobayashi Record Paper Co., Ltd.) was pasted on the work surface and left at 20°C and 65% RH for one day. Thereafter, peel resistance was measured using a tensile strength tester at a peel rate of 30 cm/min, and the peel strength was determined (unit: g/50 mm). The results are shown in Table 3 below.
Shown below.
【表】
（発明の効果）
前記の表から明らかなように、従来と全く同一
抄造条件の下で、本発明による未糊化顆粒澱粉と
水溶性高分子物質とを使用して製造した紙は、従
来の紙に比べて液浸透性を大幅に低下している。
また、同一の液透過性が低い紙を製造する場合
においても、本発明では、従来の紙に比べ、安価
な澱粉を使用し、しかも低品質のパルプを使用し
たり、叩解度を低くしたり、カレンダリングを弱
めたりすることができるので、原料コスト、抄造
エネルギーの節約を図ることができる。[Table] (Effects of the invention) As is clear from the above table, the paper produced using the ungelatinized granular starch and water-soluble polymeric substance according to the present invention under exactly the same papermaking conditions as conventional paper-making conditions , has significantly lower liquid permeability than conventional paper. Furthermore, even when producing the same paper with low liquid permeability, the present invention uses less expensive starch, lower quality pulp, and lower beatability than conventional paper. , it is possible to weaken the calendering, so it is possible to save raw material costs and papermaking energy.
第１図は未糊化顆粒澱粉がパルプ繊維間に充填
されている本発明の改良紙の部分拡大略図であ
る。
１……未糊化顆粒澱粉、２……パルプ繊維。
FIG. 1 is a partially enlarged schematic diagram of the improved paper of the present invention in which ungelatinized granular starch is filled between the pulp fibers. 1...Ungelatinized granular starch, 2...Pulp fiber.
Claims (1)
もに前記パルプ繊維の表面に結合している未糊化
顆粒澱粉を有する剥離紙用原紙であつて、該原紙
の表面の少なくとも一方に、水溶性高分子物質の
塗膜を形成したことを特徴とする剥離紙用原紙。 ２ 剥離紙用原紙の製造方法であつて、パルプ繊
維スラリーに未糊化顆粒澱粉を配合し、この未糊
化顆粒澱粉をパルプ繊維の表面に結合させつつ、
該パルプ繊維間の空〓部分に充填されるよう抄紙
し、得られた紙の表面の少なくとも一方に、水溶
性高分子物質を塗工することを特徴とする製造方
法。 ３ パルプ繊維間の空〓部分を充填しているとと
もに前記パルプ繊維の表面に結合している未糊化
顆粒澱粉を有する剥離紙用原紙であつて、該原紙
の表面の少なくとも一方に、水溶性高分子物質の
塗膜を形成した剥離紙用原紙のその表面の少なく
とも一方にシリコーン樹脂の塗膜を形成したこと
を特徴とする剥離紙。[Scope of Claims] 1. A base paper for release paper having ungelatinized granular starch filling the voids between pulp fibers and bonding to the surface of the pulp fibers, the base paper having A base paper for release paper, characterized in that a coating film of a water-soluble polymer substance is formed on at least one side. 2. A method for producing a base paper for release paper, which comprises blending ungelatinized granular starch into a pulp fiber slurry and bonding the ungelatinized granular starch to the surface of pulp fibers,
A manufacturing method comprising making paper so as to fill the voids between the pulp fibers, and coating at least one surface of the resulting paper with a water-soluble polymeric substance. 3 A base paper for release paper having ungelatinized granular starch filling the voids between the pulp fibers and bonding to the surface of the pulp fibers, the base paper having at least one surface of the base paper containing a water-soluble 1. A release paper, characterized in that a release paper base paper is coated with a polymeric substance, and a silicone resin coating is formed on at least one surface of the base paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23573588A JPH026682A (en) | 1987-12-01 | 1988-09-20 | Starch-filled paper |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30412287 | 1987-12-01 | ||
| JP23573588A JPH026682A (en) | 1987-12-01 | 1988-09-20 | Starch-filled paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH026682A JPH026682A (en) | 1990-01-10 |
| JPH0457798B2 true JPH0457798B2 (en) | 1992-09-14 |
Family
ID=26532298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23573588A Granted JPH026682A (en) | 1987-12-01 | 1988-09-20 | Starch-filled paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH026682A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009122982A1 (en) | 2008-03-31 | 2009-10-08 | 日本製紙株式会社 | Additive for papermaking and paper containing the same |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0757848B2 (en) * | 1992-04-02 | 1995-06-21 | マールブルガー、タペーテンファブリク、ヨット、ベー、シェーファー、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング、ウント、コンパニー、コマンディット、ゲゼルシャフト | Method for producing a three-dimensional surface structured coating for wall and floor surfaces and structural paste therefor |
| US5653055A (en) * | 1995-01-31 | 1997-08-05 | Nihon Tensaiseito Kabushiki Kaisha | Continuously assembled pots for raising and transplanting seedlings |
| FR2833022B1 (en) * | 2001-12-04 | 2004-07-02 | Arjo Wiggins Dessin Et Papiers | SHEET HAVING ROUGH TOUCH |
| WO2024024896A1 (en) * | 2022-07-29 | 2024-02-01 | 王子ホールディングス株式会社 | Base paper for translucent paper, translucent paper, and method for manufacturing translucent paper |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418914A (en) * | 1977-07-13 | 1979-02-13 | Mitsubishi Paper Mills Ltd | Production of transparent paper |
| JPS6329040A (en) * | 1986-07-22 | 1988-02-06 | Nissan Motor Co Ltd | Fuel supply controller for internal combustion engine |
| JPH04209897A (en) * | 1990-11-30 | 1992-07-31 | Dai Showa Seishi Kk | Glassine paper |
-
1988
- 1988-09-20 JP JP23573588A patent/JPH026682A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418914A (en) * | 1977-07-13 | 1979-02-13 | Mitsubishi Paper Mills Ltd | Production of transparent paper |
| JPS6329040A (en) * | 1986-07-22 | 1988-02-06 | Nissan Motor Co Ltd | Fuel supply controller for internal combustion engine |
| JPH04209897A (en) * | 1990-11-30 | 1992-07-31 | Dai Showa Seishi Kk | Glassine paper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009122982A1 (en) | 2008-03-31 | 2009-10-08 | 日本製紙株式会社 | Additive for papermaking and paper containing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH026682A (en) | 1990-01-10 |
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