JPH04209881A - Reclaiming and pulping of waste pressure-sensitive adhesive paper - Google Patents
Reclaiming and pulping of waste pressure-sensitive adhesive paperInfo
- Publication number
- JPH04209881A JPH04209881A JP2401636A JP40163690A JPH04209881A JP H04209881 A JPH04209881 A JP H04209881A JP 2401636 A JP2401636 A JP 2401636A JP 40163690 A JP40163690 A JP 40163690A JP H04209881 A JPH04209881 A JP H04209881A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- pulp
- sensitive adhesive
- pressure
- waste
- 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.)
- Pending
Links
- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 54
- 239000002699 waste material Substances 0.000 title claims abstract description 5
- 238000004537 pulping Methods 0.000 title claims description 7
- 239000000123 paper Substances 0.000 claims abstract description 100
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000010893 paper waste Substances 0.000 claims abstract description 25
- 239000011086 glassine Substances 0.000 claims abstract description 19
- 239000000126 substance Substances 0.000 claims abstract description 8
- 230000002378 acidificating effect Effects 0.000 claims abstract description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 14
- 229920001296 polysiloxane Polymers 0.000 abstract description 12
- 238000011084 recovery Methods 0.000 abstract description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 6
- 238000004898 kneading Methods 0.000 abstract description 6
- 238000012216 screening Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 description 23
- 239000000725 suspension Substances 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000002761 deinking Substances 0.000 description 5
- 238000005188 flotation Methods 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000010186 staining Methods 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000005708 Sodium hypochlorite Substances 0.000 description 4
- 238000007865 diluting Methods 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000004061 bleaching Methods 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 150000003377 silicon compounds Chemical class 0.000 description 2
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 2
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 150000008043 acidic salts Chemical class 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Paper (AREA)
Abstract
Description
［０００１］ [0001]
【産業上の利用分野】本発明は、感圧接着紙古紙（損紙
も含む）の再生パルプ化法に関し、特に離解性の悪いグ
ラシン紙を剥離紙の基材に使用している感圧接着紙を含
む古紙から感圧接着剤、シリコン、プラスチック等を効
果的に分離除去し、パルプ回収率の高い再生パルプを得
る、感圧接着紙古紙の再生パルプ化法に関するものであ
る。
［０００２］[Industrial Application Field] The present invention relates to a method for recycling and pulping waste paper (including waste paper) with pressure-sensitive adhesives, and particularly relates to pressure-sensitive adhesives that use glassine paper, which has poor disintegration properties, as the base material of release paper. This invention relates to a method for converting pressure-sensitive adhesive waste paper into recycled pulp, which effectively separates and removes pressure-sensitive adhesives, silicone, plastics, etc. from waste paper containing paper, and obtains recycled pulp with a high pulp recovery rate. [0002]
【従来の技術】現在、我が国ではパルプ製造の為の原料
として、再生用損紙を含む古紙の使用量は、紙・板紙生
産用原料の５０％を越えており、既に主原料のひとつの
位置を占めている。再生パルプ化が可能な古紙は、例え
ば新聞、ダンボール、雑誌、模造、色土１、上白、カー
ド、特許、中白、白マニラ、台紙、地券、感熱記録紙、
感圧複写紙、ビジネスフォーム等である。これら古紙か
らの再生パルプ化法は、一般的には古紙を離解してパル
プ懸濁液を得る離解工程、パルプ懸濁液中の異物を分離
する粗選、精選工程、印刷インキを分離する脱墨工程、
白色度を上げる漂白工程等を適宜組み合わせている。
［０００３］Ｌかし、感圧接着紙、ワックス加工した紙
、ホットメルト樹脂含有の紙等は、パルプ繊維から感圧
接着剤、ワックス、ホットメルト樹脂等が分離すること
ができず、古紙回収市場では再生パルプ化が不可能な紙
（禁忌品）とされている。特に、感圧接着紙の場合は、
感圧接着剤が５〜５０％も含まれており、この感圧接着
剤は粘着力が強く、パルプ繊維からの分離が困難である
。そして、再生パルプ中に感圧接着剤が含有していると
、この再生パルプを使用して抄紙した時に、抄紙工程で
感圧接着剤がワイヤーの目を塞いだり、プレスロールや
毛布を汚して紙切れを起こし、抄紙効率を著しく低下さ
せてしまう。そのうえ紙面上に斑点を形成する等、操業
性や品質面で悪影響を及ぼすという問題が起きる。また
、剥離紙用基材として使用されているグラシン紙は、重
度に叩解されたパルプ繊維を使用して抄紙し、スーパー
カレンダーで表面処理を施しているため、再離解が難し
い紙の代表とされている。さらに、剥離紙はそのグラシ
ン紙にシリコン化合物やフッ素化合物の剥離剤が塗布さ
れ、再生パルプ化時の離解をより一層困難にしている。
［０００４］このグラシン剥離紙を使用している感圧接
着紙古紙の離解を促進するためにアルカリ剤の添加や離
解時間の延長という手段も考えられるが、紙基材の離解
促進と同時にプラスチックや感圧接着剤が不適当に細片
化されてしまい、後の分離工程での除去が極めて困難に
なる。このような問題を抱えているために、現状ではグ
ラシン剥離紙を使用している感圧接着紙を含む古紙は再
生パルプ化が敬遠され、産業廃棄物として扱われている
のが実情である。
［０００５］[Prior Art] Currently, in Japan, the amount of used paper, including recycled waste paper, used as a raw material for pulp production exceeds 50% of the raw material for paper and paperboard production, and it has already become one of the main raw materials. occupies . Used paper that can be made into recycled pulp includes, for example, newspapers, cardboard, magazines, imitations, colored soil 1, white paper, cards, patents, white inside, white manila, mounts, land certificates, thermal recording paper,
These include pressure-sensitive copy paper, business forms, etc. These recycled pulping methods from waste paper generally include a disintegration step in which the waste paper is disintegrated to obtain a pulp suspension, a rough selection and selection step in which foreign substances are separated from the pulp suspension, and a decomposition step in which printing ink is separated. ink process,
Bleaching processes to increase whiteness are combined as appropriate. [0003] L-paper, pressure-sensitive adhesive paper, wax-treated paper, hot-melt resin-containing paper, etc. cannot be separated from the pulp fibers, so the waste paper cannot be recovered. In the market, it is considered a paper that cannot be converted into recycled pulp (a contraindicated item). Especially in the case of pressure-sensitive adhesive paper,
It contains 5-50% of pressure-sensitive adhesive, which has a strong adhesive force and is difficult to separate from pulp fibers. If pressure-sensitive adhesive is contained in the recycled pulp, when paper is made using this recycled pulp, the pressure-sensitive adhesive may block the wire holes or stain the press rolls or blankets during the paper-making process. This causes paper breakage and significantly reduces papermaking efficiency. Furthermore, problems such as the formation of spots on the paper surface occur, which have an adverse effect on operability and quality. In addition, glassine paper, which is used as a base material for release paper, is made from heavily beaten pulp fibers and surface-treated with a supercalender, making it a typical paper that is difficult to deflate. ing. Furthermore, the glassine paper is coated with a release agent such as a silicon compound or a fluorine compound, making it even more difficult to disintegrate the paper during recycled pulping. [0004] Adding an alkaline agent or extending the disintegration time may be considered in order to promote the disintegration of the pressure-sensitive adhesive waste paper using this glassine release paper. The pressure sensitive adhesive may be improperly fragmented, making it extremely difficult to remove in subsequent separation steps. Because of these problems, currently used paper, including pressure-sensitive adhesive paper that uses glassine release paper, is avoided from being turned into recycled pulp and is treated as industrial waste. [0005]
【発明が解決しようとする課題】本発明は、古紙の再生
パルプ化法に関し、特に離解性の悪いグラシン剥離紙を
含む感圧接着紙古紙を離解する工程で、紙基材の離解を
促進させながら、一方で感圧接着剤等が不適当に細片化
しないようにして、後工程で感圧接着剤、シリコン、プ
ラスチック等を効果的に分離除去し、パルプ回収率の高
い再生パルプを得る古紙の処理方法を提供するも）ので
ある。
［０００６］[Problems to be Solved by the Invention] The present invention relates to a method for converting waste paper into recycled pulp, and in particular, in the step of disintegrating pressure-sensitive adhesive waste paper containing glassine release paper with poor disintegration properties, the present invention promotes disintegration of the paper base material. On the other hand, it prevents the pressure-sensitive adhesive, etc. from being inappropriately fragmented, and effectively separates and removes the pressure-sensitive adhesive, silicone, plastic, etc. in the subsequent process, and obtains recycled pulp with a high pulp recovery rate. It also provides a method for processing waste paper). [0006]
【発明が解決しようとする手段】本発明は、グラシン剥
離紙を含有する感圧接着紙古紙の再生パルプ化法におい
て、古紙を離解する離解工程で酸性物質を添加すること
を特徴とする感圧接着紙古紙の再生パルプ化法である。
［０００７］SUMMARY OF THE INVENTION The present invention provides a pressure-sensitive adhesive paper containing glassine release paper for recycling and pulping, which is characterized in that an acidic substance is added in the disintegration step of disintegrating the waste paper. This is a method for recycling and pulping adhesive paper waste. [0007]
【作用】本発明で処理対象としている感圧接着紙は、例
えば、ラベル、シート、ワッペン、粘着テープ等に加工
し、商業用、事務用、家庭用等広範囲の用途に使用され
ているもので、感圧接着紙の一般的構成は、表面基材と
剥離基材との間に感圧接着剤がサンドインチ状になって
いる。
［０００８］そして、表面基材としては、クラフト紙、
中質紙、上質紙、顔料塗布紙、感熱記録紙、感圧複写紙
及びそれらをプラスチックフィルムでラミネートした紙
、フィルム、フォイル等が用いられる。また、剥離基材
としては、グラシン紙のような高密度紙、クラフト紙、
中質紙、上質紙、顔料塗布紙及びそれらをプラスチック
フィルムでラミネートした紙、フィルム等にシリコン化
合物やフッ素化合物の如き剥離剤を塗布加工したものが
使用される。さらに、感圧接着剤としては、ゴム系、ア
クリル系、ビニルエーテル系のエマルジョンタイプ、溶
剤タイプ及び無溶剤タイプの感圧接着剤が適宜使用され
る。なお、本発明で処理対象としている感圧接着紙の古
紙には、上記のような製品と、製造工程で発生する半製
品及び損紙を含むものである。
［０００９１このような感圧接着紙を含む古紙から再生
パルプを得るためには、離解工程、粗選工程、精選工程
、二−ディング工程、フローテーション工程、漂白工程
、洗浄工程等を種々組み合わせて再生パルプ化を行うが
、離解工程て離解を促進するためアルカリ剤を添加する
と、紙基材の離解は促進されるが未だ不十分で、離解時
間を延長するとプラスチックや感圧接着剤の細片化も同
時に進み、後の処理工程で除去され難い形状になってし
まう。
［００１０１上記のような事情から、本発明者等は離解
条件について鋭意研究した結果、グラシン紙を剥離紙と
して使用している感圧接着紙を含む古紙から再生パルプ
を得るために、離解工程で酸性物質を添加すると、紙基
材の離解が非常に促進され、且つプラスチックや感圧接
着剤等の細片化が防止できることを見出した。本発明で
使用する酸性物質としては特に限定するものではないが
、例えば、塩酸、硫酸、硝酸、酢酸、ギ酸、硫酸バンド
、硫酸水素ナトリウム、亜硫酸水素ナトリウム、二酸化
塩素の製造設備からでる廃硫酸や酸性ご硝等が挙げられ
る。
［００１１］酸性物質の添加量は、その種類やグラシン
剥離紙を使用している感圧接着紙の含有率によって調節
することになるが、全古紙に対して０． ３〜１５重量
％、より好ましくは１〜１０重量％程度添加すれば良い
。さらに、離解を促進するために、離解時の温度を３０
℃以上にした方が良く、温度が高い方が離解はより促進
されるが、１００℃以上になると加圧容器の設備費が膨
大となり経済的でないため、１００℃以下にした方が良
い。
［００１２］かくして得られたパルプ懸濁液は液中のパ
ルプ分と不純分等を分離する粗選工程、精選工程を経て
、印刷インキを分散させるニーディング工程、印刷イン
キを分離する脱墨工程や洗浄工程、白色度を上げる漂白
工程等を適宜組み合わせて再生パルプ化を行い、感圧接
着剤、シリコン、プラスチック等が効果的に分離除去さ
れ、パルプ回収率の高い、工業的に極めて有用な再生パ
ルプとなる。
［００１３］[Operation] The pressure-sensitive adhesive paper treated in the present invention is processed into labels, sheets, patches, adhesive tapes, etc., and used for a wide range of purposes such as commercial, office, and household uses. The general structure of pressure-sensitive adhesive paper is that a pressure-sensitive adhesive is sandwiched between a surface substrate and a release substrate. [0008] And as the surface base material, kraft paper,
Medium-quality paper, wood-free paper, pigment-coated paper, heat-sensitive recording paper, pressure-sensitive copying paper, and papers, films, and foils laminated with plastic films are used. In addition, as a release base material, high-density paper such as glassine paper, kraft paper,
Medium-quality paper, high-quality paper, pigment-coated paper, paper made by laminating these with plastic film, and films coated with a release agent such as a silicon compound or a fluorine compound are used. Further, as the pressure-sensitive adhesive, rubber-based, acrylic-based, vinyl ether-based emulsion type, solvent-type, and solvent-free type pressure-sensitive adhesives are appropriately used. Note that the used pressure-sensitive adhesive paper to be treated in the present invention includes the above-mentioned products, as well as semi-finished products and waste paper generated during the manufacturing process. [00091 In order to obtain recycled pulp from waste paper containing such pressure-sensitive adhesive paper, various combinations of a disintegration process, a rough selection process, a fine selection process, a seconding process, a flotation process, a bleaching process, a washing process, etc. Recycled pulp is produced, but when an alkaline agent is added to promote disintegration during the disintegration process, disintegration of the paper base material is promoted, but it is still insufficient, and if the disintegration time is extended, small pieces of plastic and pressure-sensitive adhesive This also progresses at the same time, resulting in a shape that is difficult to remove in later processing steps. [00101 Due to the above-mentioned circumstances, the present inventors conducted intensive research on the disintegration conditions, and found that in order to obtain recycled pulp from waste paper, including pressure-sensitive adhesive paper that uses glassine paper as a release paper, it was found that It has been found that adding an acidic substance greatly accelerates the disintegration of the paper base material and prevents the fragmentation of plastics, pressure sensitive adhesives, etc. Acidic substances used in the present invention are not particularly limited, but examples include waste sulfuric acid from hydrochloric acid, sulfuric acid, nitric acid, acetic acid, formic acid, sulfuric acid, sodium hydrogen sulfate, sodium hydrogen sulfite, and chlorine dioxide manufacturing equipment. Examples include acidic salt. [0011] The amount of the acidic substance added will be adjusted depending on the type and the content of the pressure-sensitive adhesive paper that uses the glassine release paper, but it should be 0.000% based on the total waste paper. It may be added in an amount of about 3 to 15% by weight, more preferably about 1 to 10% by weight. Furthermore, in order to promote disintegration, the temperature during disintegration was increased to 30°C.
It is better to set the temperature to 100°C or higher, and disintegration is promoted more when the temperature is higher, but if the temperature is 100°C or higher, the equipment cost for the pressurized container becomes enormous and is not economical, so it is better to set the temperature to 100°C or lower. [0012] The pulp suspension thus obtained goes through a rough selection process to separate the pulp content and impurities in the liquid, a fine selection process, a kneading process to disperse the printing ink, and a deinking process to separate the printing ink. Recycled pulp is produced by appropriately combining a cleaning process, a bleaching process to increase whiteness, etc., and pressure-sensitive adhesives, silicone, plastics, etc. are effectively separated and removed, resulting in a high pulp recovery rate and extremely useful industrially. It becomes recycled pulp. [0013]
【実施例】以下（一実施例を挙げて本発明をより具体的
に説明するが、勿論これらに限定するものでない。なお
、例中の％及び部は重量％及び重量部を示す。
［００１４］実施例１
表面基材として、キャストコート紙を使用し、剥離基材
としてポリエチレンをラミネートしたクリーム色の上質
紙にシリコン化合物を塗布した感圧接着紙５０部と表面
基材として、キャストコート紙を使用し、剥離基材とし
てグラシン紙にシリコン化合物を塗布した感圧接着紙５
０部を使用する。
［００１５］パルパーにパルプ濃度が１５％となるよう
に上記の感圧接着紙と６０℃の水を仕込み、更に、硫酸
を対古紙当たり３％添加して２０分間離解した。この離
解した懸濁液を３％に希釈して振動式フラットスクリー
ン（スリット幅０．２０ｍｍ）で処理した。この処理後
のアクセプトパルプをパルプ濃度２５％まで濃縮して、
次亜塩素酸ナトリウムを絶乾パルプに対して５％加えて
ニーディングを行った。このニーデイジグ処理されたパ
ルプは５５℃で１２０分間放置した。更に、このパルプ
を３％に希釈して得た懸濁液を振動式フラットスクリー
ン（スリット幅０．１５ｍｍ）で処理した。このアクセ
プトパルプを０．８％に希釈して、脱墨剤〔花王（株）
製、 ｒＤＩ−６００ＲＪ：］を絶乾パルプに対して０
．３％加え、更に空気を導入しながら攪拌し泡沫浮上分
離を１０分間行った。次に、このパルプを取り出して水
で洗浄して再生パルプを得た。
［００１６］得られた再生パルプは、パルプ回収率が６
５％と高く、感圧接着剤や残存フィルムは認められなか
った。この再生パルプを配合し調製した紙は地合いが優
れており、抄紙機のワイヤーを汚すトラブルも発生しな
かった。
［００１７］実施例２
表面基材として、キャストコート紙を使用し、剥離基材
としてポリエチレンをラミネートしたクリーム色の上質
紙にシリコン化合物を塗布した感圧接着紙５０部と表面
基材として、キャストコート紙を使用し、剥離基材とし
てグラシン紙にシリコン化合物を塗布した感圧接着紙５
０部を使用する。
［００１８］パルパーにパルプ濃度が１５％となるよう
に上記の感圧接着紙と４０℃の水を仕込み、更に、塩酸
を対古紙当たり３％添加して３０分間離解した。この離
解した懸濁液を３％に希釈して振動式フラットスクリー
ン（スリット幅０．２０ｍｍ）で処理した。この処理後
のアクセプトパルプをパルプ濃度２５％まで濃縮して、
次亜塩素酸ナトリウムを絶乾パルプに対して５％加えて
ニーディングを行った。このニーディング処理されたパ
ルプは５５℃で１２０分間放置した。更に、このパルプ
を３％に希釈して得た懸濁液を振動式フラットスクリー
ン（スリット幅０．１５ｍｍ）で処理した。このアクセ
プトパルプを０． ８％に希釈して、脱墨剤〔花王（株
）製、 ｒＤＩ−６００ＲＪ）を絶乾パルプに対して０
．３％加え、更に空気を導入しながら攪拌し泡沫浮上分
離を１０分間行った。次に、このパルプを取り出して水
で洗浄して再生パルプを得た。
［００１９］得られた再生パルプは、パルプ回収率が６
３％と高く、感圧接着剤や残存フィルムは認められなか
った。この再生パルプを配合し調製した紙は地合いが優
れており、抄紙機のワイヤーを汚すトラブルも発生しな
かった。
［００２０１実施例３
表面基材として、キャストコート紙を使用し、剥離基材
としてポリエチレンをラミネートしたクリーム色の上質
紙にシリコン化合物を塗布した感圧接着紙５０部と表面
基材として、キャストコート紙を使用し、剥離基材とし
てグラシン紙にシリコン化合物を塗布した感圧接着紙５
０部を使用する。
［００２］、１パルパーにパルプ濃度が１５％となるよ
うに上記の感圧接着紙と２５℃の水を仕込み、更に、硫
酸バンドを対古紙当たり５％添加して４０分間離解した
。
この離解した懸濁液を３％に希釈して振動式フラットス
クリーン（スリット幅０．２０ｍｍ）で処理した。この
処理後のアクセプトパルプをパルプ濃度２５％まで濃縮
して、次亜塩素酸ナトリウムを絶乾パルプに対して５％
加えてニーディングを行った。このニーディング処理さ
れたパルプは５５℃で１２０分間放置した。更に、この
パルプを３％に希釈して得た懸濁液を振動式フラットス
クリーン（スリット幅０．１５ｍｍ）で処理した。この
アクセプトパルプを０．８％に希釈して、脱墨剤〔花王
（株）製、 ｒＤＩ−６００ＲＪ：］を絶乾パルプに対
して０、 ３％加え、更に空気を導入しながら攪拌し泡
沫浮上分離を１０分間行った。次に、このパルプを取り
出して水で洗浄して再生パルプを得た。
［００２２］得られた再生パルプは、パルプ回収率が６
０％と高く、感圧接着剤や残存フィルムは認められなか
った。この再生パルプを配合し調製した紙は地合いが優
れており、抄紙機のワイヤーを汚すトラブルも発生しな
かった。
［００２３］実施例４
表面基材として、キャストコート紙を使用し、剥離基材
としてポリエチレンをラミネートしたクリーム色の上質
紙にシリコン化合物を塗布した感圧接着紙５０部と表面
基材として、キャストコート紙を使用し、剥離基材とし
てグラシン紙にシリコン化合物を塗布した感圧接着紙５
０部を使用する。
［００２４］パルパーにパルプ濃度が１５％となるよう
に上記の感圧接着紙と８０℃の水を仕込み、更に、硫酸
水素ナトリウムを対置紙当たり８％添加して１５分開離
解した。この離解した懸濁液を３％に希釈して振動式フ
ラットスクリーン（スリット幅０．２０ｍｍ）で処理し
た。この処理後のアクセプトパルプをパルプ濃度２５％
まで濃縮して、次亜塩素酸ナトリウムを絶乾パルプに対
して５９６加えてニーディングを行った。このニーディ
ング処理されたパルプは５５℃で１２０分間放置した。
更に、このパルプを３％に希釈して得た懸濁液を振動式
フラットスクリーン（スリット幅０．１５ｍｍ）で処理
した。このアクセプトパルプを０． ８％に希釈して、
脱墨剤〔花王（株）製、 ｒＤＩ−６００ＲＪ）を絶乾
パルプに対して０． ３％加え、更に空気を導入しなが
ら攪拌し泡沫浮上分離を１０分間行った。次に、このパ
ルプを取り出して水で洗浄して再生パルプを得た。
［００２５］得られた再生パルプは、パルプ回収率が６
３％と高く、感圧接着剤や残存フィルムは認められなか
った。この再生パルプを配合し調製した紙は地合いが優
れており、抄紙機のワイヤーを汚すトラブルも発生しな
かった。
［００２６］比較例１
実施例１の硫酸添加を水酸化ナトリウム添加に変更した
。その他は実施例１と同様に行った。得られた再生パル
プは、パルプ回収率が５０％と低く （スクリーンのり
ジェクトには離解されていないグラシン紙の剥離紙が多
く含まれていた。）、感圧接着剤や残存フィルムは認め
られなかった。この再生パルプを配合し調製した紙は地
合いが優れており、抄紙機のワイヤーを汚すトラブルも
発生しなかった。
［００２７］比較例２
実施例１の硫酸添加を水酸化ナトリウム添加に変更し、
更に、離解時間を５０分間延長した。その他は実施例１
と同様に行った。得られた再生パルプは、パルプ回収率
が６２％と高くなったが、感圧接着剤がパルプ３グラム
当たり２個含まれ、残存フィルムはパルプ１０グラム当
たりに１個認められ、抄紙機のワイヤーを汚すトラブル
が発生した。
［００２８］[Example] The present invention will be explained in more detail with reference to an example below, but it is not limited thereto. Note that % and parts in the example indicate weight % and parts by weight. ] Example 1 Cast-coated paper was used as the surface base material, 50 parts of pressure-sensitive adhesive paper made of cream-colored high-quality paper laminated with polyethylene and coated with a silicone compound as the release base material, and cast-coated paper as the surface base material. Pressure-sensitive adhesive paper 5 made of glassine paper coated with a silicone compound as a release base material.
Use 0 copies. [0015] The above pressure-sensitive adhesive paper and water at 60° C. were charged into a pulper so that the pulp concentration was 15%, and 3% sulfuric acid was added to the waste paper and disintegrated for 20 minutes. This disaggregated suspension was diluted to 3% and treated with a vibrating flat screen (slit width 0.20 mm). The accepted pulp after this treatment is concentrated to a pulp concentration of 25%,
Kneading was performed by adding 5% sodium hypochlorite to the bone-dry pulp. This kneaded jigged pulp was left at 55° C. for 120 minutes. Further, a suspension obtained by diluting this pulp to 3% was treated with a vibrating flat screen (slit width 0.15 mm). This accepted pulp was diluted to 0.8% and a deinking agent [Kao Corporation]
manufactured by rDI-600RJ:] to bone dry pulp.
．． 3% was added, and the mixture was stirred while introducing air to carry out foam flotation separation for 10 minutes. Next, this pulp was taken out and washed with water to obtain regenerated pulp. [0016] The obtained recycled pulp has a pulp recovery rate of 6
It was as high as 5%, and no pressure-sensitive adhesive or residual film was observed. The paper prepared by blending this recycled pulp had excellent texture and did not cause problems such as staining the wires of the paper machine. [0017] Example 2 Cast-coated paper was used as the surface base material, 50 parts of pressure-sensitive adhesive paper coated with a silicone compound on cream-colored high-quality paper laminated with polyethylene as the release base material, and cast coated paper as the surface base material. Pressure-sensitive adhesive paper 5 using coated paper and applying a silicone compound to glassine paper as a release base material
Use 0 copies. [0018] The above pressure-sensitive adhesive paper and water at 40° C. were charged into a pulper so that the pulp concentration was 15%, and further, hydrochloric acid was added at 3% based on the waste paper and disintegrated for 30 minutes. This disaggregated suspension was diluted to 3% and treated with a vibrating flat screen (slit width 0.20 mm). The accepted pulp after this treatment is concentrated to a pulp concentration of 25%,
Kneading was performed by adding 5% sodium hypochlorite to the bone-dry pulp. This kneaded pulp was left at 55° C. for 120 minutes. Further, a suspension obtained by diluting this pulp to 3% was treated with a vibrating flat screen (slit width 0.15 mm). 0.0% of this accepted pulp. The deinking agent [manufactured by Kao Corporation, rDI-600RJ] was diluted to 8% and added to the bone dry pulp.
．． 3% was added, and the mixture was stirred while introducing air to carry out foam flotation separation for 10 minutes. Next, this pulp was taken out and washed with water to obtain regenerated pulp. [0019] The obtained recycled pulp has a pulp recovery rate of 6
It was as high as 3%, and no pressure-sensitive adhesive or residual film was observed. The paper prepared by blending this recycled pulp had excellent texture and did not cause problems such as staining the wires of the paper machine. [00201 Example 3 Cast-coated paper was used as the surface base material, 50 parts of pressure-sensitive adhesive paper coated with a silicone compound on cream-colored high-quality paper laminated with polyethylene as the release base material, and cast-coated paper as the surface base material. Pressure-sensitive adhesive paper 5 using paper and applying a silicone compound to glassine paper as a release base material
Use 0 copies. [002], 1 pulper was charged with the above pressure-sensitive adhesive paper and water at 25°C so that the pulp concentration was 15%, and furthermore, sulfate was added at 5% based on the waste paper and disintegrated for 40 minutes. This disaggregated suspension was diluted to 3% and treated with a vibrating flat screen (slit width 0.20 mm). The accepted pulp after this treatment is concentrated to a pulp concentration of 25%, and sodium hypochlorite is added to the bone-dried pulp at a concentration of 5%.
In addition, kneading was performed. This kneaded pulp was left at 55° C. for 120 minutes. Furthermore, a suspension obtained by diluting this pulp to 3% was treated with a vibrating flat screen (slit width 0.15 mm). This accepted pulp was diluted to 0.8%, a deinking agent [manufactured by Kao Corporation, rDI-600RJ:] was added at 0.3% to the bone dry pulp, and the mixture was stirred while introducing air to form foam. Flotation separation was performed for 10 minutes. Next, this pulp was taken out and washed with water to obtain regenerated pulp. [0022] The obtained recycled pulp has a pulp recovery rate of 6
It was as high as 0%, and no pressure-sensitive adhesive or residual film was observed. The paper prepared by blending this recycled pulp had excellent texture and did not cause problems such as staining the wires of the paper machine. [0023] Example 4 Cast-coated paper was used as the surface base material, 50 parts of pressure-sensitive adhesive paper coated with a silicone compound on cream-colored high-quality paper laminated with polyethylene as the release base material, and cast coated paper as the surface base material. Pressure-sensitive adhesive paper 5 using coated paper and applying a silicone compound to glassine paper as a release base material
Use 0 copies. [0024] The above pressure-sensitive adhesive paper and water at 80° C. were charged into a pulper so that the pulp concentration was 15%, and sodium hydrogen sulfate was added at 8% per opposing paper and disintegrated for 15 minutes. This disaggregated suspension was diluted to 3% and treated with a vibrating flat screen (slit width 0.20 mm). The accepted pulp after this treatment has a pulp density of 25%.
Kneading was performed by adding 596 ml of sodium hypochlorite to the bone-dried pulp. This kneaded pulp was left at 55° C. for 120 minutes. Furthermore, a suspension obtained by diluting this pulp to 3% was treated with a vibrating flat screen (slit width 0.15 mm). 0.0% of this accepted pulp. diluted to 8%,
A deinking agent [manufactured by Kao Corporation, rDI-600RJ] was added to the absolutely dry pulp at a concentration of 0. 3% was added, and the mixture was stirred while introducing air to carry out foam flotation separation for 10 minutes. Next, this pulp was taken out and washed with water to obtain regenerated pulp. [0025] The obtained recycled pulp has a pulp recovery rate of 6
It was as high as 3%, and no pressure-sensitive adhesive or residual film was observed. The paper prepared by blending this recycled pulp had excellent texture and did not cause problems such as staining the wires of the paper machine. [0026] Comparative Example 1 The addition of sulfuric acid in Example 1 was changed to the addition of sodium hydroxide. The rest was carried out in the same manner as in Example 1. The recycled pulp obtained had a low pulp recovery rate of 50% (the screen paste inject contained a large amount of glassine paper release paper that had not been disintegrated), and no pressure-sensitive adhesive or residual film was observed. Ta. The paper prepared by blending this recycled pulp had excellent texture and did not cause problems such as staining the wires of the paper machine. [0027] Comparative Example 2 The addition of sulfuric acid in Example 1 was changed to the addition of sodium hydroxide,
Furthermore, the disintegration time was extended for 50 minutes. Others are Example 1
I did the same thing. The recycled pulp obtained had a high pulp recovery rate of 62%, but it contained two pressure-sensitive adhesives per 3 grams of pulp, one residual film per 10 grams of pulp, and paper machine wires. A problem occurred that contaminated the [0028]
【発明の効果】本発明により、従来は再生パルプ化が敬
遠されていたグラシン剥離紙を含む感圧接着紙古紙の再
生パルプ化が可能となり、得られた再生パルプを配合し
て調製した紙は地合が優れ、抄紙時のトラブルのないも
のであった。[Effects of the Invention] According to the present invention, it is now possible to convert used pressure-sensitive adhesive paper containing glassine release paper into recycled pulp, which was previously avoided, and paper prepared by blending the obtained recycled pulp can be made into recycled pulp. The paper had excellent formation, and there were no problems during paper making.
Claims (2)
の再生パルプ化法において、古紙を離解する離解工程で
酸性物質を添加することを特徴とする感圧接着紙古紙の
再生パルプ化法。[Claim 1] A recycled pulping method for pressure-sensitive adhesive waste paper containing glassine release paper, which comprises adding an acidic substance in the disintegration step of disintegrating the waste paper. .
請求項１記載の感圧接着紙古紙の再生パルプ化法。2. The method for converting waste pressure-sensitive adhesive paper into recycled pulp according to claim 1, wherein the treatment temperature in the disintegrating step is 30° C. or higher.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2401636A JPH04209881A (en) | 1990-12-12 | 1990-12-12 | Reclaiming and pulping of waste pressure-sensitive adhesive paper |
| DE19914192568 DE4192568T (en) | 1990-10-19 | 1991-10-07 | |
| PCT/JP1991/001366 WO1992007137A1 (en) | 1990-10-19 | 1991-10-07 | Method of pulping waste pressure-sensitive adhesive paper |
| US07/862,539 US5316621A (en) | 1990-10-19 | 1991-10-07 | Method of pulping waste pressure-sensitive adhesive paper |
| DE19914192568 DE4192568C2 (en) | 1990-10-19 | 1991-10-07 | Process for the preparation of self-adhesive waste paper |
| FI922756A FI103900B1 (en) | 1990-10-19 | 1992-06-15 | Method of defibrating pressure-sensitive return adhesive paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2401636A JPH04209881A (en) | 1990-12-12 | 1990-12-12 | Reclaiming and pulping of waste pressure-sensitive adhesive paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04209881A true JPH04209881A (en) | 1992-07-31 |
Family
ID=18511474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2401636A Pending JPH04209881A (en) | 1990-10-19 | 1990-12-12 | Reclaiming and pulping of waste pressure-sensitive adhesive paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04209881A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002309493A (en) * | 2001-04-12 | 2002-10-23 | Osaka Sealing Printing Co Ltd | Method for recycling waste paper |
| JP2005281906A (en) * | 2004-03-30 | 2005-10-13 | Nichiyu Solution Inc | Defibration promoting agent for used paper and waste paper |
| JP2013237954A (en) * | 2012-05-17 | 2013-11-28 | Marusumi Paper Co Ltd | Method for producing deinked waste paper pulp |
| US10407828B2 (en) | 2014-12-25 | 2019-09-10 | Seiko Epson Corporation | Sheet manufacturing apparatus and sheet manufacturing method |
| EP4394124A1 (en) * | 2022-12-30 | 2024-07-03 | UPM-Kymmene Corporation | A glassine paper comprising recycled fiber |
| WO2024141186A1 (en) * | 2022-12-30 | 2024-07-04 | Upm-Kymmene Corporation | Recycling of release liner glassine and sck into high quality pulp |
| WO2024141419A1 (en) * | 2022-12-30 | 2024-07-04 | Upm-Kymmene Corporation | A glassine paper comprising bctmp and recycled pulp |
| WO2024141415A1 (en) * | 2022-12-30 | 2024-07-04 | Upm-Kymmene Corporation | A glassine paper with short fiber furnish and improved sustainability |
-
1990
- 1990-12-12 JP JP2401636A patent/JPH04209881A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002309493A (en) * | 2001-04-12 | 2002-10-23 | Osaka Sealing Printing Co Ltd | Method for recycling waste paper |
| JP2005281906A (en) * | 2004-03-30 | 2005-10-13 | Nichiyu Solution Inc | Defibration promoting agent for used paper and waste paper |
| JP2013237954A (en) * | 2012-05-17 | 2013-11-28 | Marusumi Paper Co Ltd | Method for producing deinked waste paper pulp |
| US10407828B2 (en) | 2014-12-25 | 2019-09-10 | Seiko Epson Corporation | Sheet manufacturing apparatus and sheet manufacturing method |
| EP4394124A1 (en) * | 2022-12-30 | 2024-07-03 | UPM-Kymmene Corporation | A glassine paper comprising recycled fiber |
| WO2024141186A1 (en) * | 2022-12-30 | 2024-07-04 | Upm-Kymmene Corporation | Recycling of release liner glassine and sck into high quality pulp |
| WO2024141419A1 (en) * | 2022-12-30 | 2024-07-04 | Upm-Kymmene Corporation | A glassine paper comprising bctmp and recycled pulp |
| WO2024141415A1 (en) * | 2022-12-30 | 2024-07-04 | Upm-Kymmene Corporation | A glassine paper with short fiber furnish and improved sustainability |
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