JP2007514868A - Coated base paper and method for producing coated base paper - Google Patents
Coated base paper and method for producing coated base paper Download PDFInfo
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- JP2007514868A JP2007514868A JP2006516223A JP2006516223A JP2007514868A JP 2007514868 A JP2007514868 A JP 2007514868A JP 2006516223 A JP2006516223 A JP 2006516223A JP 2006516223 A JP2006516223 A JP 2006516223A JP 2007514868 A JP2007514868 A JP 2007514868A
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- base paper
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- polyvinyl alcohol
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 230000004888 barrier function Effects 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 26
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 24
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 22
- 239000000049 pigment Substances 0.000 claims abstract description 16
- 239000000126 substance Substances 0.000 claims abstract description 15
- 239000004816 latex Substances 0.000 claims abstract description 7
- 229920000126 latex Polymers 0.000 claims abstract description 7
- 229920003043 Cellulose fiber Polymers 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 229920001131 Pulp (paper) Polymers 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000007766 curtain coating Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 21
- 229920001296 polysiloxane Polymers 0.000 description 20
- 239000000523 sample Substances 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 5
- 239000005995 Aluminium silicate Substances 0.000 description 4
- 235000012211 aluminium silicate Nutrition 0.000 description 4
- 238000003490 calendering Methods 0.000 description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000011115 styrene butadiene Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1476—Release layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2839—Web or sheet containing structurally defined element or component and having an adhesive outermost layer with release or antistick coating
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
本発明の目的はコートベース紙である。本発明のコートベース紙は１から５層のバリア層を有するセルロース繊維系の顔料コート紙を含む。バリア層は、ポリビニルアルコール、アクリレート系バリアラテックスおよびそれらの混合物からなる群から選択されたバリア性化学物質を含む。本発明の目的はまた、コートベース紙の製造方法である。その製造方法においては、セルロース繊維系の顔料コート紙上に、ウェブに接触しない方法を用いて１から５層のバリア層を塗布する。
The object of the present invention is a coated base paper. The coated base paper of the present invention comprises a cellulose fiber pigment coated paper having 1 to 5 barrier layers. The barrier layer includes a barrier chemical selected from the group consisting of polyvinyl alcohol, acrylate-based barrier latex, and mixtures thereof. The object of the invention is also a method for producing a coated base paper. In the production method, 1 to 5 barrier layers are applied on a cellulose fiber pigment-coated paper by a method that does not contact the web.
Description
本発明の目的は、ラベル用のベース紙または剥離紙として特に適するコートベース紙であり、且つバリアすなわち保護層をセルロース繊維系のコート紙に塗布したコートベース紙を製造する方法である。 An object of the present invention is a method for producing a coated base paper which is a coated base paper particularly suitable as a base paper for a label or a release paper, and in which a barrier or protective layer is applied to a coated paper of cellulose fiber type.
剥離紙または裏紙としても知られるベース紙は、ラベルラミネートおよび自己接着ラベルの製造に、および増加しつつあるものとして、接着性材料の包装材料にも使用されている。最も一般的には、ベース紙または剥離紙はグラシン型の透明なスーパーカレンダー処理した表面サイズ紙、または通常はカオリンを含有する顔料でブレードコートした紙、たとえばできるだけ不透過性になるようにスーパーカレンダー処理した上質紙である。代表的な既知の先行技術による感圧ラベルのラミネート構造を付録の図１に図解して示した。 Base papers, also known as release papers or backing papers, are also used in the manufacture of label laminates and self-adhesive labels and, as an increasing number, in packaging materials for adhesive materials. Most commonly, the base paper or release paper is a glassine-type transparent supercalendered surface-sized paper, or paper that is usually blade-coated with a pigment containing kaolin, such as a supercalender to be as impermeable as possible Treated fine paper. A typical known prior art pressure sensitive label laminate structure is illustrated schematically in FIG. 1 of the Appendix.
図１中、ベース紙１０には、最も多くの場合シリコーンを含む剥離コート２０を塗布してある。感圧性の糊層３０がシリコーンを含む剥離コート２０に塗布してあり、そしてラベルを形成する表面紙４０が接着層３０に貼ってある。
In FIG. 1, the
ベース紙に塗布したシリコーン層は平滑で、孔のないものでなければならない。何故なら、そうであればラベルの表面紙がベース紙の表面から所望のように滑らかに離れるからである。孔のない平滑なシリコーン層を得るためには、ベース紙に孔、皺、塵、または凹凸があってはならない。ベース紙の表面はシリコーンがベース紙内に浸入するのを防止するために十分塞いでおかなければならない。そうすればベース紙もまた触媒によるシリコーンの硬化に化学的影響を及ぼさないであろう。もしベース紙に孔が存在すると、接着剤層からの接着剤がシリコーン層からベース紙にまで浸入して、後続の処理工程でリター・パス及びラベルラミネートのウェブに、亀裂および破損が生じることがある。 The silicone layer applied to the base paper must be smooth and non-porous. This is because the surface paper of the label then moves away smoothly from the surface of the base paper as desired. In order to obtain a smooth silicone layer without pores, the base paper must be free of pores, soot, dust or irregularities. The surface of the base paper must be sufficiently sealed to prevent silicone from entering the base paper. Then the base paper will also not have a chemical effect on the catalytic curing of the silicone. If holes are present in the base paper, the adhesive from the adhesive layer can penetrate from the silicone layer into the base paper, causing cracks and breaks in the litter path and label laminate web in subsequent processing steps. is there.
通常、シリコーンは、ベース紙上に１〜１．２５ｇ／ｍ２の厚さで塗布されて、約１４０℃で硬化させられる。シリコーンは高価なので、シリコーンをできるだけ薄い層に塗布するように努める必要があるが、それにも拘わらずもう一方では優れた剥離特性のゆえに、上質紙にしばしば存在する孔、空隙、および表面の凹凸による破損および起こり得る問題が生じるのを予め防止するために、シリコーン層に十分な厚さをもたせて製造するように努めることが必要である。シリコーンの使用を減らし得るために、ベース紙の表面はできるだけ不透過性および平滑であるべきである。 Typically, silicone is applied on a base paper at a thickness of 1 to 1.25 g / m 2 and cured at about 140 ° C. Because silicone is expensive, it is necessary to try to apply the silicone in as thin a layer as possible, but nevertheless due to the excellent release properties, due to the pores, voids and surface irregularities often present in fine paper In order to prevent damage and possible problems in advance, it is necessary to strive to produce a silicone layer with sufficient thickness. In order to be able to reduce the use of silicone, the surface of the base paper should be as impermeable and smooth as possible.
刊行物Ｗｏｃｈｅｎｂｌ．Ｐａｐｉｅｒｆａｂｒ．１２２、１１号、４６８〜４７２頁（１９９４）で、シリコーンの消費を減らすために、６７ｇ／ｍ２の坪量を有するさらし紙に、ポリビニルアルコール及びカルボキシメチルセルロース、あるいはポリビニルアルコール及びデンプンを含む表面サイズ剤を塗布したプロセスが提示されている。 Publication Wochenbl. Papierfabr. 122, 11, pp. 468-472 (1994), a surface size comprising polyvinyl alcohol and carboxymethyl cellulose, or polyvinyl alcohol and starch, on an exposed paper having a basis weight of 67 g / m 2 in order to reduce the consumption of silicone. The process of applying the agent is presented.
特開平５−１７１６００には、紙の両面のポリビニルアルコールによるコートと、それに続く加圧水蒸気処理およびカレンダー処理が記載されている。 Japanese Patent Application Laid-Open No. 5-171600 describes coating of both sides of paper with polyvinyl alcohol, followed by pressurized steam treatment and calendar treatment.
紙の製造において、ポリビニルアルコールは通常コーティングペースト中の保護コロイドとして使用される。特に、ポリビニルアルコールの低分子量グレードは、カオリン含有顔料混合物等を含むコーティングペーストに適している。ポリビニルアルコールはまた、コーティングおよび表面サイズ剤組成物中の主たるまたは補助的な結合剤として、ならびに蛍光増白剤のような添加剤のキャリアとしても用いられる。 In the manufacture of paper, polyvinyl alcohol is usually used as a protective colloid in the coating paste. In particular, low molecular weight grades of polyvinyl alcohol are suitable for coating pastes containing kaolin-containing pigment mixtures and the like. Polyvinyl alcohol is also used as the primary or auxiliary binder in coating and surface sizing compositions and as a carrier for additives such as optical brighteners.
ポリビニルアルコールをウェブ上で分離した層として乾燥することは困難で、しかもエネルギーを消費することが知られている。皮革状の表面が生じやすく、そこから含まれている水を除くことが難しくて、その結果表面に凹凸が残るからである。 It is known that polyvinyl alcohol is difficult to dry as a separate layer on the web and consumes energy. This is because a leather-like surface is easily formed, and it is difficult to remove water contained therein, and as a result, irregularities remain on the surface.
上述のことからわかることであるが、明確な必要性が存在するのは、化学パルプで製造されたコート紙に基づき、材料節減が達成でき、しかもラベルラミネートを製造するときに剥離層として薄いシリコーン層のみが必要な、より嵩高くかつ坪量の小さい、不透過性で平滑なベース紙、およびかかるベース紙の製造方法である。 As can be seen from the above, a clear need exists, based on coated paper made of chemical pulp, which can achieve material savings and a thin silicone as a release layer when producing label laminates. A bulky, low basis weight, impermeable and smooth base paper that requires only a layer, and a method for producing such a base paper.
本発明の目的は化学パルプをベースとする不透過性コートベース紙である。 The object of the present invention is an impervious coated base paper based on chemical pulp.
本発明のさらなる目的は、化学パルプをベースとする不透過性コートベース紙の製造方法である。 A further object of the present invention is a method for producing an impervious coated base paper based on chemical pulp.
それに加えて、本発明の目的は、化学パルプをベースとする不透過性コートベース紙をラベルのためのベース紙および剥離紙として使用することである。 In addition, an object of the present invention is to use an impervious coated base paper based on chemical pulp as the base paper and release paper for labels.
本発明のベース紙の、その製造方法の、およびそれを使用することの特徴は、特許請求の範囲に記載されている。 The features of the base paper of the present invention, its manufacturing method and its use are described in the claims.
先行技術のベース紙で生ずる問題は、セルロース繊維、好ましくは化学パルプをベースとする顔料コートベース紙を、好ましくはポリビニルアルコールを含むバリア層でコートする本発明の解決策を活用することにより、回避できるかまたは著しく小さくできる。 The problems arising with the prior art base papers are avoided by exploiting the solution of the invention in which pigment coated base papers based on cellulose fibers, preferably chemical pulp, are preferably coated with a barrier layer comprising polyvinyl alcohol. Can be significantly smaller.
本発明の解決策においては、１層または数層の薄いバリア層を、好ましくは主として化学パルプによる、特に好ましくは５０％を超える化学パルプによるセルロース繊維から製造された顔料コート紙上に塗布する。層の厚さは、ベース紙とコート紙とを秤量するか、または使用した平方メートルとバリア性化学物質の流量（ｇ／ｓ／ｍ２／ｓ）とから計算するかによる層の坪量（ｇ／ｍ２）の測定によって定義される。好ましくは、紙は当業者に知られている顔料コート上質紙であって、それをコートするために、カオリンまたは炭酸塩を含む顔料ペースト、好ましくはスチレン−ブタジエンラテックス、ポリビニルアルコールおよび当業者に使用されているその他の通常の結合剤からなる群から選択した結合剤を有するカオリンペーストが使用されている顔料コート上質紙である。 In the solution of the present invention, one or several thin barrier layers are applied on pigment-coated paper, preferably made from cellulose fibers mainly by chemical pulp, particularly preferably by more than 50% chemical pulp. Layer thickness is based on whether the base paper and coated paper are weighed or calculated from the square meter used and the flow rate of the barrier chemical (g / s / m 2 / s) (g / M 2 ) measurement. Preferably, the paper is a pigment coated fine paper known to those skilled in the art and used to coat it, pigment pastes containing kaolin or carbonate, preferably styrene-butadiene latex, polyvinyl alcohol and those skilled in the art. Pigment coated fine paper in which a kaolin paste having a binder selected from the group consisting of other conventional binders is used.
先行技術によって製造されたコート紙上に、バリア性化学物質を含む水溶液の１から５層、好ましくは１層を、カーテンコート法および噴霧によって実施されるスプレー法からなる群から選択された、ウェブに非接触なそれ自体既知の方法を用いて塗布する。バリア性化学物質は、ポリビニルアルコール、アクリレート系バリアラテックスからなる群から選択する。その例として、Ｒａｉｓｉｏ Ｃｈｅｍｉｃａｌｓ （Ｏｙ）社のＲｅｂａｒｃｏ（登録商標）シリーズ、およびそれらの混合物を挙げることができる。ポリビニルアルコールは、短鎖で、粘度（ｍＰａｓ）および加水分解率（ｍｏｌ％）が３〜９８、１５〜９９の範囲で変化するものを使用することが望ましい。バリア性化学物質は、塗布する溶液が最大で１００ｃＰ、好ましくは最大で５０ｃＰの粘度を有するように、３〜５０重量％、好ましくは３〜２５重量％、特に好ましくは３〜５重量％の濃度を有する水溶液として塗布する。バリア性化学物質としてアクリレートラテックスを使用するとき、これらのラテックスは、増量剤、顔料、スチレン−ブタジエンラテックスおよびその他通常の結合剤も含んでいてよい。バリア性化学物質はベース紙におけるその量が好ましくは０．５〜３ｇ／ｍ２になるように塗布する。バリア層の塗布はオンラインコートで実施することが望ましい。 On a coated paper produced by the prior art, on a web, selected from the group consisting of a curtain coating method and a spraying method carried out by spraying, preferably 1 to 5 layers of an aqueous solution containing a barrier chemical. Application is performed using a non-contact method known per se. The barrier chemical substance is selected from the group consisting of polyvinyl alcohol and acrylate-based barrier latex. Examples include the Rebarco (R) series from Raisio Chemicals (Oy), and mixtures thereof. It is desirable to use a polyvinyl alcohol having a short chain and a viscosity (mPas) and a hydrolysis rate (mol%) that change in the range of 3-98 and 15-99. The barrier chemical substance has a concentration of 3 to 50% by weight, preferably 3 to 25% by weight, particularly preferably 3 to 5% by weight so that the solution to be applied has a viscosity of at most 100 cP, preferably at most 50 cP. It is applied as an aqueous solution having When acrylate latex is used as the barrier chemical, these latexes may also contain extenders, pigments, styrene-butadiene latex and other conventional binders. The barrier chemical substance is applied so that its amount in the base paper is preferably 0.5 to 3 g / m 2 . The barrier layer is preferably applied by online coating.
バリア層の塗布後、乾燥は、ＩＲまたは流動床乾燥法のような当業者に知られた方法で、非接触乾燥法を用いて実施する。乾燥後、場合によってはスーパーカレンダー処理を行ってもよい。本発明のバリア層は、すでにそれ自体、スーパーカレンダー処理が必ずしも必要でない程度に不透過性なのである。スプレー塗布およびカーテンコート法において、場合によって、顔料、表面張力調節剤、乾燥剤、発泡抑制剤、および当業者に知られたその他の添加剤をバリア層に加えてもよい。 After application of the barrier layer, drying is performed using a non-contact drying method by methods known to those skilled in the art, such as IR or fluid bed drying methods. After drying, a super calendar process may be performed in some cases. The barrier layer of the present invention is already impermeable to such an extent that supercalendering is not necessarily required. In spray coating and curtain coating processes, pigments, surface tension modifiers, drying agents, foam inhibitors, and other additives known to those skilled in the art may optionally be added to the barrier layer.
本発明にとっては、バリア層を塗布するためにスプレーまたはカーテンコート法のような非接触法を使用することが重要であって、そのような方法によって、不透過性の均質な表面が得られるのである。これらの方法では、ウェブに接触する部分を有する装置を使用しないので、破損を生じることはない。 For the present invention, it is important to use a non-contact method such as a spray or curtain coat method to apply the barrier layer, as such a method will result in an impermeable homogeneous surface. is there. These methods do not use a device having a portion that contacts the web, and therefore do not cause breakage.
本発明の方法によって、孔のない、例を見ないほど不透過性の、均質な、しかも平滑な表面を製造できる。その結果として、シリコーンがベース紙内に吸収されることも浸入することもないので、剥離層のために使用するシリコーンの量はおよそ０．７ｇ／ｍ２に減らすことができる。シリコーン処理は、従来技術で知られた任意の方法によって、ラベルおよび剥離紙の分野で知られた任意のシリコーンまたはシリコーン・エマルションを用いて実施すればよい。 The method according to the invention makes it possible to produce homogeneous, smooth surfaces that are free of pores and imperceptibly impervious. As a result, the amount of silicone used for the release layer can be reduced to approximately 0.7 g / m 2 since the silicone is not absorbed or penetrated into the base paper. The silicone treatment may be performed with any silicone or silicone emulsion known in the field of labels and release papers by any method known in the art.
さらに、コーティングペースト中の結合剤量、およびコーティングペーストそのものの量を従来のものに比べて２０％までも減らすこともできるので、ベース紙中の繊維材料の量を減らすことができる。このようにして、坪量を軽量化したにも拘わらず従来技術に知られたベース紙と少なくとも同等の良好な品質の、しかもそれらと同程度またはそれらよりもさらに嵩高いベース紙を製造することが可能になる。カレンダー処理は従来より軽くすることができて、軽量化した紙で標準の厚さを達成できる。本発明の解決手法を用いて、材料消費の大幅な削減を達成することも可能である。 Furthermore, since the amount of the binder in the coating paste and the amount of the coating paste itself can be reduced to 20% compared to the conventional one, the amount of the fiber material in the base paper can be reduced. In this way, despite the fact that the basis weight has been reduced, it is possible to produce a base paper that is at least as good as the base paper known in the prior art and that is comparable to or even bulkier than those. Is possible. Calendering can be made lighter than before, and standard thickness can be achieved with lighter paper. It is also possible to achieve a significant reduction in material consumption using the solution of the present invention.
本発明を次の実施例により、さらに詳細に示すが、しかし、本発明をこれらにより限定することを意図するものではない。 The invention is illustrated in more detail by the following examples, but is not intended to limit the invention thereby.
スプレー法を用いてポリビニルアルコールでコートしたコートベース紙の製造
８５ｇ／ｍ２の坪量および１２．５ｇ／ｍ２のブレードコートを有する非カレンダー処理紙Ｓｉｍｋｒａｆｔ ＭＦ Ｓｐｅｃｉａｌ（登録商標）を、Ｈｅｌｉｃｏａｔｅｒ装置を使用してスプレーコートによりポリビニルアルコールの薄い層でコートした。試料１はコートしていない対照試料である。試料２においては、１０〜９８の加水分解率、５％の固形分、６４ｃＰの粘度のポリビニルアルコールＭｏｗｉｏｌ（登録商標）、および１ｇ／ｍ２の塗布量を使用した。試料３においては、１５〜９９の加水分解率、５％の固形分、２７ｃＰの粘度のポリビニルアルコールＭｏｗｉｏｌ（登録商標）、および１ｇ／ｍ２の塗布量を使用し、また試料４においては同じグレードを使用したが、このときは固形分は３％、粘度は１８ｃＰおよび塗布量は０．５ｇ／ｍ２であった。ベース紙の顔料コートはブレードコートで実施し、続いて乾燥、それからスプレーコートまたはカーテンコートのいずれかを用いてのバリア層コート、乾燥、および場合によりシート状で生産規模のスーパーカレンダーで実施するカレンダー処理を行った。下の表１にカレンダー処理なしの試料の、下の表２にはカレンダー処理を行った試料の結果を示してある。
Non calendered paper Simkraft MF Special (registered trademark) having a basis weight and blade coating of 12.5 g / m 2 of manufacturing 85 g / m 2 of coated base paper coated with polyvinyl alcohol by using a spray method, a Helicoater device Used to coat with a thin layer of polyvinyl alcohol by spray coating. Sample 1 is an uncoated control sample. Sample 2 used a hydrolysis rate of 10-98, 5% solids, polyvinyl alcohol Mowiol® with a viscosity of 64 cP, and a coating weight of 1 g / m 2 . Sample 3 uses a hydrolysis rate of 15-99, 5% solids, polyvinyl alcohol Mowiol® with a viscosity of 27 cP, and a coating weight of 1 g / m 2 , and in sample 4 the same grade In this case, the solid content was 3%, the viscosity was 18 cP, and the coating amount was 0.5 g / m 2 . The base paper pigment coat is performed by blade coating, followed by drying, then barrier layer coating using either spray coating or curtain coating, drying, and optionally sheet-like calendering performed on a production scale super calendar. Processed. Table 1 below shows the results of the sample without calendar treatment, and Table 2 below shows the results of the sample subjected to calendar treatment.
インク吸収値は、ポリビニルアルコールを使用したときに、ポリビニルアルコールを有しない試料に比較して著しく低く、油吸収値は、ポリビニルアルコールを使用したときに、それがないものより格別低くなっていた。これらの試験のグレードはカレンダー処理がなくてさえシリコーン処理に使うことができる。 The ink absorption value was significantly lower when polyvinyl alcohol was used as compared to the sample without polyvinyl alcohol, and the oil absorption value was significantly lower than that without polyvinyl alcohol. These test grades can be used for silicone treatment even without calendering.
Claims (14)
Use of the base paper according to any one of claims 1 to 5 or the base paper produced by the method according to any one of claims 6 to 13 as a base paper and a release paper for labels.
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| Application Number | Priority Date | Filing Date | Title |
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| FI20030976A FI20030976A (en) | 2003-06-30 | 2003-06-30 | Coated base paper and process for making coated base paper |
| PCT/FI2004/000317 WO2005001201A1 (en) | 2003-06-30 | 2004-05-25 | Coated base paper and a method for manufacturing coated base paper |
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| JP2007514868A true JP2007514868A (en) | 2007-06-07 |
| JP2007514868A5 JP2007514868A5 (en) | 2007-07-19 |
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| US (1) | US20060231226A1 (en) |
| EP (1) | EP1639200A1 (en) |
| JP (1) | JP2007514868A (en) |
| CN (1) | CN1813106A (en) |
| CA (1) | CA2531153A1 (en) |
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| WO2005001201A1 (en) | 2005-01-06 |
| FI20030976A0 (en) | 2003-06-30 |
| CN1813106A (en) | 2006-08-02 |
| US20060231226A1 (en) | 2006-10-19 |
| EP1639200A1 (en) | 2006-03-29 |
| FI20030976A (en) | 2004-12-31 |
| CA2531153A1 (en) | 2005-01-06 |
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