JPH07173792A - Moisture-proof paper - Google Patents
Moisture-proof paperInfo
- Publication number
- JPH07173792A JPH07173792A JP5322868A JP32286893A JPH07173792A JP H07173792 A JPH07173792 A JP H07173792A JP 5322868 A JP5322868 A JP 5322868A JP 32286893 A JP32286893 A JP 32286893A JP H07173792 A JPH07173792 A JP H07173792A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- moisture
- synthetic resin
- proof
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Laminated Bodies (AREA)
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は紙に合成樹脂の被覆処理
を施した防湿用包装等に使用され防湿紙に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-proof paper which is used in a moisture-proof packaging in which paper is coated with a synthetic resin.
【０００２】[0002]
【従来技術の説明】従来、紙の防湿加工は、ポリエチレ
ン等の合成樹脂を接着剤として合成樹脂フィルムをラミ
ネートしたり、直接、溶融樹脂を紙に被覆する等により
行われていいる。しかし、これら防湿加工紙は、古紙回
収をし再生を行おうとすると、紙と合成樹脂フィルムと
の接着が強固であるため、古紙プラント内の離解工程に
おいて離解効率が著しく低下したり、未解離樹脂として
残った樹脂から紙の繊維が離脱しにくく繊維の収率が低
下したり、あるいは不要物の除去工程で樹脂部分が除去
されにくくなる等の問題が生じていた。Description of the Related Art Moisture-proofing of paper has hitherto been carried out by laminating a synthetic resin film using a synthetic resin such as polyethylene as an adhesive or by directly coating a molten resin on the paper. However, when the used paper is recovered and recycled, the adhesiveness between the paper and the synthetic resin film is so strong that the disintegration efficiency in the disintegration process in the used paper plant is significantly reduced, or the undissociated resin is not dissociated. As a result, the fiber of the paper is difficult to be separated from the remaining resin, the yield of the fiber is reduced, or the resin portion is difficult to be removed in the step of removing the unnecessary matter.
【０００３】そこで、古紙として再生可能な防湿紙を得
るために、ワックス系エマルジョンを塗布するもの（特
公昭６３−３９０２２、特公昭６３−３９０２３号公報
等）、ワックス系エマルジョンと合成ゴム系エマルジョ
ンを混合塗布するもの（特公昭５５−２２５９７号公
報）、あるいはワックス系エマルジョンと水溶性エマル
ジョンを混合塗布するものがあるが、いずれもワックス
系であるため加工紙が滑りやすかったり、機械的な損傷
やブロッキングを起こしたりする欠点があった。また、
それらは離解できたとしても樹脂を完全に除去すること
は困難であり、再生後抄紙したとき、樹脂が再浮遊した
り、白物の場合は再生コピー紙や印刷紙としたとき外観
のみでなくコピー品質や印刷品質に問題が発生してしま
う。Therefore, in order to obtain a moisture-proof paper that can be recycled as waste paper, a wax-based emulsion is applied (Japanese Patent Publication No. 63-39022, Japanese Patent Publication No. 63-39023, etc.), a wax-based emulsion and a synthetic rubber-based emulsion. There is a mixed coating (Japanese Patent Publication No. 55-22597) or a mixed coating of a wax emulsion and a water-soluble emulsion, but both are wax-based, so that the processed paper is slippery or mechanically damaged. There was a drawback that it caused blocking. Also,
Even if they can be disintegrated, it is difficult to completely remove the resin, and when paper is made after recycling, the resin resuspends, and in the case of a white product, not only the appearance when using recycled copy paper or printing paper Problems occur with copy quality and print quality.
【０００４】[0004]
【発明が解決しようとする課題】本発明はこのような点
に鑑みてなされたもので、防湿性および使用性は従来の
ポリエチレンなどの合成樹脂によって被覆された防湿紙
と同等で、しかも古紙再生時における繊維の収率が未加
工紙と同等、かつ、再生されるパルプが新聞古紙同様に
問題なく使用できる防湿紙を得ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has the same moisture resistance and usability as a conventional moisture-proof paper covered with a synthetic resin such as polyethylene, and recycled recycled paper. The purpose of the present invention is to obtain a moisture-proof paper in which the yield of fibers at the same time is equivalent to that of unprocessed paper, and recycled pulp can be used without problems like newspaper waste paper.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、第一
に、基紙と防湿性合成樹脂フィルムとをポリビニルアル
コール系水溶性合成樹脂により貼り合わせた防湿紙が提
供される。第二に、基紙上に、ポリビニルアルコール系
水溶性合成樹脂層、防湿性合成樹脂層を順次塗工により
ラミネートした防湿紙が提供される。以下本発明を詳細
に説明する。上記第一の防湿紙においては、基紙と防湿
性合成樹脂フィルムとの間にポリビニルアルコール系水
溶性合成樹脂を介在させたため、古紙再生時、水が基紙
端面より侵入しポリビニルアルコール系水溶性合成樹脂
を溶解する。それにより防湿性合成樹脂フィルムは離解
機により細分される前に基紙から剥離し、ワイヤーある
いはフィルターにより簡単に系外に除去される。上記第
二の防湿紙の場合も各層の材料は、第一の防湿紙のもの
と同様であるため、第一の防湿紙の場合と同様、水溶性
合成樹脂層が溶解し、防湿性合成樹脂フィルム層が基紙
から剥離し除去される。According to the present invention, first, there is provided a moisture-proof paper obtained by laminating a base paper and a moisture-proof synthetic resin film with a polyvinyl alcohol-based water-soluble synthetic resin. Secondly, there is provided a moisture-proof paper in which a polyvinyl alcohol-based water-soluble synthetic resin layer and a moisture-proof synthetic resin layer are sequentially laminated on a base paper by coating. The present invention will be described in detail below. In the first moisture-proof paper, since the polyvinyl alcohol-based water-soluble synthetic resin is interposed between the base paper and the moisture-proof synthetic resin film, when the used paper is recycled, water enters from the end surface of the base paper and the polyvinyl alcohol-based water-soluble synthetic resin is used. Dissolve synthetic resin. As a result, the moisture-proof synthetic resin film is peeled off from the base paper before being subdivided by the disintegrator and easily removed to the outside of the system by a wire or a filter. Also in the case of the second moisture-proof paper, the material of each layer is the same as that of the first moisture-proof paper, so that the water-soluble synthetic resin layer is dissolved and the moisture-proof synthetic resin is melted as in the case of the first moisture-proof paper. The film layer is peeled off the base paper and removed.
【０００６】また、上記のように防湿性合成樹脂フィル
ムまたはフィルム層が除去できなくても該フィルムまた
はフィルム層は紙の繊維とは離脱しているため、脱墨工
程で容易に除去できる。一方、該フィルムまたはフィル
ム層が剥離された基紙は加工前の紙と同等の効率および
収率で再生される。また、水溶性合成樹脂は精洗処理後
も水に溶けたまま再生パルプ内に残留しても、元々、紙
力増強剤やサイズ剤などとしても用いられるものである
ため製紙工程でのトラブルは発生しない。以下に本発明
で使用される材料について説明する。Even if the moisture-proof synthetic resin film or film layer cannot be removed as described above, it can be easily removed in the deinking step because the film or film layer is separated from the fibers of the paper. On the other hand, the base paper from which the film or film layer has been peeled off is regenerated with the same efficiency and yield as the unprocessed paper. In addition, even if the water-soluble synthetic resin remains in the regenerated pulp while being dissolved in water even after the washing process, it is originally used as a paper-strengthening agent, sizing agent, etc. Does not occur. The materials used in the present invention will be described below.
【０００７】まず、防湿性合成樹脂フィルムとしては、
例えば、８〜４０μｍの二軸延伸ポリプロピレン（ＯＰ
Ｐ）フィルム、３〜６０μｍの二軸延伸ポリエチレンテ
レフタレート（ＯＰＥＴ）フィルム、１０〜４０μｍの
未延伸ポリプロピレン（ＣＰＰ）フィルム、高密度また
は低密度ポリエチレンフィルム等が挙げられ、印刷加工
の有無、要求される精度、防湿性能等によって材質、厚
さ等が決定される。また、上記第二の防湿紙においてラ
ミネートする場合の防湿性合成樹脂としては、ポリ塩化
ビニリデンなど、コーティングによる製膜性が良く、か
つ、防湿性の高いものが好ましい。ポリ塩化ビニリデン
をコーティングする際には、トルエン、酢酸エチル、メ
チルエチルケトン、シクロヘキサノン、テトラヒドロフ
ランなどの溶剤に溶解した塗布液を用いる。また、ポリ
塩化ビニリデンを水性エマルジョンでコーティングする
場合はアンカーコート剤をあらかじめコーティングして
おくか、溶剤タイプのポリ塩化ビニリデンをコーティン
グしておくことが望ましい。First, as the moisture-proof synthetic resin film,
For example, 8-40 μm biaxially oriented polypropylene (OP
P) film, 3 to 60 μm biaxially stretched polyethylene terephthalate (OPET) film, 10 to 40 μm unstretched polypropylene (CPP) film, high density or low density polyethylene film, and the like, with or without printing processing required. The material, thickness, etc. are determined by the accuracy, the moisture-proof performance, etc. Further, as the moisture-proof synthetic resin for lamination on the second moisture-proof paper, those having good film-forming property by coating and having high moisture-proof property such as polyvinylidene chloride are preferable. When coating polyvinylidene chloride, a coating solution dissolved in a solvent such as toluene, ethyl acetate, methyl ethyl ketone, cyclohexanone, or tetrahydrofuran is used. When polyvinylidene chloride is coated with an aqueous emulsion, it is desirable to coat the anchor coating agent in advance or solvent-type polyvinylidene chloride.
【０００８】次に、ポリビニルアルコール系水溶性合成
樹脂としては、例えば、ポリビニルアルコール、部分け
ん化タイプの変性ポリビニルアルコール（けん化度：８
０〜９０ｍｏｌ％程度）、それらをベースにしたスチレ
ン、またはアクリルなどにより変性した接着性樹脂が挙
げられる。Next, as the polyvinyl alcohol-based water-soluble synthetic resin, for example, polyvinyl alcohol, partially saponified modified polyvinyl alcohol (saponification degree: 8
0 to 90 mol%), styrene based on them, or an adhesive resin modified with acrylic or the like.
【０００９】[0009]
【実施例】以下、実施例により本発明をさらに具体的に
説明する。 〔実施例１〜４〕基紙として６０ｇ／ｍ2の晒片艶クラ
フト紙を用い、該基紙上に下記第１表のポリビニルアル
コール系水溶性合成樹脂および防湿性合成樹脂（フイル
ム）を被覆して防湿紙を作製した。EXAMPLES The present invention will be described in more detail below with reference to examples. [Examples 1 to 4] 60 g / m 2 bleached piece kraft paper was used as the base paper, and the base paper was coated with the polyvinyl alcohol-based water-soluble synthetic resin and the moisture-proof synthetic resin (film) shown in Table 1 below. To produce a moisture-proof paper.
【００１０】[0010]
【表１】 （注）・実施例１および２は、基紙と防湿性合成樹脂フ
ィルムとを貼り合わせた後、基紙側から１５０℃の熱板
を３ｋｇの圧力で１．０秒当てて接着した。 ・実施例３および４は、基紙上にポリビニルアルコール
系水溶性合成樹脂、次いで防湿性合成樹脂を順次塗工し
た。塗工はすべてメイヤーバー塗工によった。 ・表中の（注１）は、溶剤塗工タイプを５ｇ／ｍ2で２
回塗布。 ・表中の（注２）は、溶剤塗工タイプを２ｇ／ｍ2で塗
布した上に水性エマルジョンタイプを５ｇ／ｍ2で塗
布。[Table 1] (Note) In Examples 1 and 2, after bonding the base paper and the moisture-proof synthetic resin film, a hot plate at 150 ° C. was applied from the base paper side at a pressure of 3 kg for 1.0 second to bond them. -In Examples 3 and 4, a polyvinyl alcohol-based water-soluble synthetic resin and then a moisture-proof synthetic resin were sequentially coated on a base paper. All coating was by Mayer bar coating.・ (Note 1) in the table is 2 for solvent coated type at 5 g / m 2 .
Apply once.・ For (Note 2) in the table, the solvent coating type was applied at 2 g / m 2 and the aqueous emulsion type was applied at 5 g / m 2 .
【００１１】得られた各試料について、透湿度、紙繊維
の離解性、残留樹脂の有無、耐ブロッキング性の試験を
行った。試験結果を第２表に示す。なお、比較のため低
密度ポリエチレンラミネート紙（ラミネートフィルム
厚：２０μｍ）についても同様に試験し結果を併記し
た。この場合の基紙には実施例と同様のクラフト紙を用
いた。Each of the obtained samples was tested for water vapor permeability, disintegration of paper fibers, presence or absence of residual resin, and blocking resistance. The test results are shown in Table 2. For comparison, low density polyethylene laminated paper (laminate film thickness: 20 μm) was similarly tested and the results are also shown. In this case, the same kraft paper as in the example was used as the base paper.
【００１２】〔試験方法〕 「透湿度」スイスＬｙｓｓｙ社製Ｌ８０−４０００透湿
度測定器を使用し、４０℃、９０％〜４０℃、０％にて
測定した。単位：ｇ／ｍ2・２４ｈｒ 「離解性」、「残留樹脂」紙片を３０ｃｍ角に切り、パ
ルプ換算濃度２％で実験室的小型離解機により３０分間
離解した後、エアーバブル式フローテスターによって樹
脂分を除去し、残ったパルプ液より手抄きにより抄紙し
た。それを目視により繊維の離解度合をコピー済みの紙
の場合と比較し、さらに１８０℃の熱板を３秒間当てて
残留樹脂を確認した。[Test Method] "Moisture Permeability" It was measured at 40 ° C., 90% to 40 ° C., and 0% using a L80-4000 moisture permeability meter manufactured by Lyssy, Switzerland. Unit: g / m 2 · 24 hr “Disintegration”, “residual resin” A piece of paper is cut into 30 cm squares, and disintegrated for 30 minutes with a laboratory small disintegrator at a pulp conversion concentration of 2%, and then the resin is applied with an air bubble flow tester. The portion was removed, and paper was manually made from the remaining pulp liquid. The degree of disaggregation of the fiber was visually compared with that in the case of the copied paper, and a hot plate at 180 ° C. was further applied for 3 seconds to confirm the residual resin.
【００１３】「離解性」の評価 〇：繊維の塊なし
×：繊維の塊なあり 「残留樹脂」の評価 〇：なし ×：あり 「耐ブロッキング性」５０℃の恒温槽の中に１０ｃｍ角
のサンプルを防湿性合成樹脂フィルム（または層）どう
しを合わせて１０ｋｇの加重をかけ、２４ｈｒ放置した
後、両者を剥離し剥がれ具合を確認する。 評価 〇：音はするが軽く剥がれる。Evaluation of "disaggregation property" ◯: No lump of fiber X: No lump of fiber ◯: Evaluation of "residual resin" ◯: None X: Yes "Blocking resistance" 10 cm square in a 50 ° C thermostat The sample is put together with the moisture-proof synthetic resin films (or layers), a weight of 10 kg is applied thereto, and after standing for 24 hours, both are peeled off and the degree of peeling is confirmed. Evaluation ◯: There is sound, but it peels off lightly.
【００１４】[0014]
【表２】 比較例１；コピー済み紙 比較例２；低密度ポリエチレンラミネート紙[Table 2] Comparative Example 1; Copier Paper Comparative Example 2; Low Density Polyethylene Laminated Paper
【００１５】第２表から明らかなように、本発明による
ＯＰＰフィルムまたはＯＰＥＴフィルムを変性ＰＶＡに
より基紙に貼り合わせたもの（実施例１、２）、また、
基紙上にＰＶＡ、ポリ塩化ビニリデンを順次塗布したも
の（実施例３、４）、いずれも透湿度（防湿性）は従来
のポリエチレンラミネート紙（比較例２）と比較して遜
色はなく、また、離解性および残留樹脂の有無（古紙再
生使用性）は、従来のものと比べて格段に改善され、問
題はない。さらに、耐ブロッキング性も良好である。As is apparent from Table 2, the OPP film or OPET film according to the present invention is bonded to the base paper by the modified PVA (Examples 1 and 2), and
A base paper on which PVA and polyvinylidene chloride were sequentially applied (Examples 3 and 4), and the water vapor transmission rate (moisture resistance) was comparable to that of the conventional polyethylene laminated paper (Comparative Example 2). The disintegration property and the presence / absence of residual resin (recyclability of waste paper) are markedly improved as compared with the conventional one, and there is no problem. Furthermore, blocking resistance is also good.
【００１６】さらに、上記試験項目以外から評価すべき
こととして、 防湿性合成樹脂フィルムを貼り合わせる場合は、少
量の使用樹脂量で貼り合わせることができ、高防湿性能
が安価に得られること、また、事前に成膜されたフィル
ムであることから高精度の印刷品質、高い機械的強度、
安定した品質が得られる。 水溶性合成樹脂層および防湿性合成樹脂層をコーテ
ィングで設ける場合は、グラビア印刷等により印刷など
他の加工と一緒に同一工程で１パスで行うことができ
る。Further, it should be evaluated from other than the above test items that when a moisture-proof synthetic resin film is laminated, it can be laminated with a small amount of resin used, and high moisture-proof performance can be obtained at low cost. , Because it is a pre-deposited film, it has high-precision printing quality, high mechanical strength,
Stable quality can be obtained. When the water-soluble synthetic resin layer and the moisture-proof synthetic resin layer are provided by coating, they can be performed in one pass in the same step together with other processing such as printing by gravure printing or the like.
【００１７】なお、表中の比較例１では「コピー済み
紙」を用い、未加工紙の例として比較対象とした。ま
た、実施例では基紙として晒クラフト紙を使用したが、
もちろん、未晒クラフト紙でも差し支えはない。In Comparative Example 1 in the table, "copied paper" was used as an example of unprocessed paper for comparison. Also, in the examples, bleached kraft paper was used as the base paper,
Of course, unbleached kraft paper can be used.
【００１８】[0018]
【発明の効果】以上のように本発明によれば、防湿性は
従来のポリエチレン等の合成樹脂によって被覆された防
湿紙と同等であり、しかも古紙再生時における繊維の離
解性等は未加工紙と同等で新聞古紙等と同様に問題なく
使用できる防湿紙が得られる。As described above, according to the present invention, the moisture-proof property is equivalent to that of a conventional moisture-proof paper coated with a synthetic resin such as polyethylene, and the disaggregation property of fibers at the time of recycling used paper is unprocessed paper. A moisture-proof paper can be obtained that is equivalent to, and can be used without problems, like newspaper waste paper.
Claims (2)
ビニルアルコール系水溶性合成樹脂により貼り合わせて
なることを特徴とする防湿紙。1. A moisture-proof paper comprising a base paper and a moisture-proof synthetic resin film bonded together by a polyvinyl alcohol-based water-soluble synthetic resin.
性合成樹脂層、防湿性合成樹脂層を順次塗工によりラミ
ネートしてなることを特徴とする防湿紙。2. A moisture-proof paper comprising a base paper, a polyvinyl alcohol-based water-soluble synthetic resin layer, and a moisture-proof synthetic resin layer, which are sequentially laminated by coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32286893A JP3273393B2 (en) | 1993-12-21 | 1993-12-21 | Moisture proof paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32286893A JP3273393B2 (en) | 1993-12-21 | 1993-12-21 | Moisture proof paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07173792A true JPH07173792A (en) | 1995-07-11 |
| JP3273393B2 JP3273393B2 (en) | 2002-04-08 |
Family
ID=18148515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32286893A Expired - Fee Related JP3273393B2 (en) | 1993-12-21 | 1993-12-21 | Moisture proof paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3273393B2 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720354A (en) * | 1980-07-11 | 1982-02-02 | Toppan Printing Co Ltd | Laminate |
| JPS5747429A (en) * | 1980-09-02 | 1982-03-18 | Sanyo Kokusaku Pulp Co | Sheet for baking and cooking tray |
| JPH03162956A (en) * | 1989-08-29 | 1991-07-12 | Dainippon Printing Co Ltd | Base material with resin-coated layer |
| JPH04351535A (en) * | 1991-05-28 | 1992-12-07 | Showa Aircraft Ind Co Ltd | Manufacture of honeycomb core made of plastic |
| JPH05247894A (en) * | 1992-03-05 | 1993-09-24 | Dynic Corp | Recyclable converted paper |
-
1993
- 1993-12-21 JP JP32286893A patent/JP3273393B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720354A (en) * | 1980-07-11 | 1982-02-02 | Toppan Printing Co Ltd | Laminate |
| JPS5747429A (en) * | 1980-09-02 | 1982-03-18 | Sanyo Kokusaku Pulp Co | Sheet for baking and cooking tray |
| JPH03162956A (en) * | 1989-08-29 | 1991-07-12 | Dainippon Printing Co Ltd | Base material with resin-coated layer |
| JPH04351535A (en) * | 1991-05-28 | 1992-12-07 | Showa Aircraft Ind Co Ltd | Manufacture of honeycomb core made of plastic |
| JPH05247894A (en) * | 1992-03-05 | 1993-09-24 | Dynic Corp | Recyclable converted paper |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3273393B2 (en) | 2002-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3623944A (en) | Pressure sensitive adhesive coated polymeric film laminates | |
| US4853286A (en) | Wafer processing film | |
| JP2001131484A (en) | Article having releasable surface layer, releasable surface layer-forming material, method for releasing and removing surface layer from article, and article having removed surface layer therefrom | |
| US4075051A (en) | Method of trimming photoresist film | |
| US4677015A (en) | Transfer sheet | |
| US6989191B2 (en) | Composite paper material with a pressure-sensitive adhesive coating finished to be resistant to repulping | |
| JPH07173792A (en) | Moisture-proof paper | |
| US3762987A (en) | Water solubilized polyvinyl adhesive method | |
| JP4508774B2 (en) | Aluminum vapor deposition label and manufacturing method thereof | |
| JP3003109B2 (en) | Laminate | |
| JP3701980B2 (en) | Repulpable paper composite | |
| JP2566580Y2 (en) | Insole decorative frame for packaging boxes | |
| JP2622924B2 (en) | Method for producing renewable release paper | |
| US5656342A (en) | End surface-protected frame-supported pellicle for photolithography | |
| JPH0881661A (en) | Kraft adhesive tape | |
| JP2002144488A (en) | Laminated paper of easy separation and manufacturing method therefor | |
| JP3160729B2 (en) | Renewable film laminate paper | |
| JP4566920B2 (en) | Information entry laminated sheet | |
| JPS6312792B2 (en) | ||
| JPH08183134A (en) | Release paper with excellent curling resistance and printability, and its production | |
| JPH06250570A (en) | Regenerating method of image carrier | |
| JPH0319537B2 (en) | ||
| JPS6094174A (en) | Formation of conductive coating film | |
| JPH06280199A (en) | Base material for release paper | |
| NO115655B (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |