US3925150A - Selective reclamation of waste paper products - Google Patents

Selective reclamation of waste paper products Download PDF

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Publication number
US3925150A
US3925150A US34849673A US3925150A US 3925150 A US3925150 A US 3925150A US 34849673 A US34849673 A US 34849673A US 3925150 A US3925150 A US 3925150A
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United States
Prior art keywords
station
waste paper
pulper
pulp
fibered
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Expired - Lifetime
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English (en)
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Paul G Marsh
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Black Clawson Co
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Black Clawson Co
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Publication date
Application filed by Black Clawson Co filed Critical Black Clawson Co
Priority to US34849673 priority Critical patent/US3925150A/en
Priority to CA191,397A priority patent/CA1015696A/en
Priority to FR7406854A priority patent/FR2224588B1/fr
Priority to DE2416251A priority patent/DE2416251A1/de
Priority to JP3702474A priority patent/JPS49126902A/ja
Priority to GB1516074A priority patent/GB1460178A/en
Application granted granted Critical
Publication of US3925150A publication Critical patent/US3925150A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • 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

Definitions

  • D21C 5/02 Waste corrugated paperboard is reclaimed by a selec- [58] Field of Search 162/4, 189, 5, 191, 55, tive pulping process which separates the charge into 162/264; 241/24, 25, 28, 29 two fractions, one containing the major portion of the neutral sulphite semi-chemical pulp and other short [56] References Cited fibered constituents, and the other containing the UNITED STATES PATENTS major portion of the kraft pulp and a relatively small 2,041,164 6/1953 Hill et al. 162/4 amount.
  • Short fibgreq pulp process includes a 2,697.66] 2/1954 Hollis 4 D v ⁇ 62/4 separating step following a pulplng treatment con- 2913.362 11/1959 0151 1, 162/55 trolled a sufficiently Short imam defiber the 3,301,745 1/1967 Coppick et al. to 241/24 x $110" fibemd Constituents While leaving the long 3,698,649 10/1972 Herbert 241/44 bered constituents substantially undefibered.
  • the pro- 3,833,460 9/1974 lannazzi etal 162/5 cess is applicable to other mixtures of waste paper 3,88475O 5/1975 lanazzani 162/4 sheets having different prgperfies of deflberabflity FOREIGN PATENTS OR APPLICATIONS 940.250 10/1963 United Kingdom H 162/5 5 Clams 2 Drum figures l qo--LCLEANINGHSCREENINGHDEWATERING SELECTIVE RECLAMATION OF WASTE PAPER PRODUCTS BACKGROUND OF THE INVENTION
  • the paperboard industry produces vast quantities of corrugated paperboard for use in packaging, especially for quantity packaging of food products for delivery to retail outlets, and also as cartons for a wide variety of products. Corrugated paperboard is commonly composed of a fluted layer having a layer of linerboard on one or both sides thereof, the double-sided board being almost universally used for the production of cartons.
  • the fluted layer of corrugated paperboard is usually composed of a sheet known as 9-point corrugating medium, which is made from relatively low grade and short-fibered pulp, the most commonly used materials being neutral sulphite semichemical (NSSC) pulp and short-fibered kraft pulp known as bogus. Frequently one or both of these pulps are used together with some waste paper stock.
  • the liners used on corrugated board are commonly made of a good grade of kraft pulp, and on the average they constitute of the order of 70% by weight of conventional three-ply cor rugated board.
  • Containers formed of corrugated board are usually used only once and then discarded, especially by the food industry. They therefore constitute a major source of waste paper available for reuse by a waste paper mill.
  • corrugated board is pulped in the usual way for use as waste paper stock, the high grade kraft constituents of the liners and the relatively lower grade fiber constituents of the corrugating medium are thoroughly mixed, and the resulting furnish is no longer suitable as liner stock. It is therefore commonly used to make lower grade products, such as boxboard, fillers for other types of paperboard, and in corrugating medium.
  • corrugated board can be separated into two fractions, one of which is composed so predominantly of kraft fiber that it is suitable for reuse as a substitute for virgin kraft pulp.
  • the other fraction will contain the majority of the NSSC and other short fibered constituents of corrugating medium and will be suitable for reuse for such purposes as the production of additional corrugating medium as well as paper-board of various types.
  • the invention is based on the discovery that when corrugated board is initially subjected to a pulping action in water suspension, the sheet of corrugating medium formed of short fibered pulp has a higher degree of wettability than the layers of linerboard formed of long fibered pulp, and therefore the corrugating medium tends to defiber considerably more quickly than the kraft liners.
  • the invention therefore proposes to subject used corrugated board to a carefully controlled pulping action which will be effective to defiber the corrugating medium to a range of relatively small particles sizes while leaving the liner in substantially 2 larger pieces, and then to separate the two kinds of pulp by screening through screen perforations which will pass the small particles but reject the larger pieces of predominantly kraft sheet.
  • the invention is applicable to both continuous and batch operation.
  • Continuous operation can be carried out in a pulper equiped with an extraction plate having relatively large extraction holes, e.g., of the order of L0 to 2.0 inches in diameter. If such a pulper is operated at a high throughput rate which will establish a short retention time for the corrugated board, namely of the order of one minute, the corrugating medium will be reduced to the desired small particle size range while the kraft liner is still in relatively large pieces.
  • the extracted stock is then screened through screen perforations sized to pass only the relatively small defibcred particles, e.g., Va inch in diameter.
  • the resulting two fractions can then be separately treated to prepare them for use.
  • fraction accepted by A; inch screen perforations as described will contain the majority of the NSSC and other short fibered constituents of the corrugating medium but will also include substantially more kraft fiber than the original medium and is therefore suitable for reuse not only in the production of additional corrugating medium but for other purposes as well.
  • the fraction which is rejected by the screen will consist so predominantly of long fibered kraft pulp that it can be used for many purposes normally requiring high quality kraft fiber, and it is particularly suitable for blending with virgin kraft for many uses.
  • Batch operation in accordance with the invention may be carried out by means of a pulper of similar construction except that its extraction plate is provided with relatively small perforations e.g., It: inch in diamc ter.
  • the pulper should be operated for only a brief interval, with extraction starting promptly and continuing until a substantial portion e.g., one third, of the original charge has been removed.
  • the fraction remaining in the pulper is then dumped separately, and both fractions can be treated as required to prepare the fiber therein for reuse.
  • FIG. I is a diagrammatic representation of a system for practicing the invention as a continuous process.
  • FIG. 2 is a similar view of a system for practicing the invention as a batch process.
  • the pulper 10 is preferably of the construction shown in Felton et al US. Pat. No. 3,339,851 and comprises a rotor 11 rotating above an extraction plate 12 having perforations therethrough which are of substantial size, namely of the order of 1.0-2.0 inches in diameter. These perforations communicate with an outlet chamber 13 at the bottom of the pulper from which a discharge line 14 leads to the rest of the systern.
  • the pulper is preferably equipped with a junk remover 15 connected by an outlet 16 with the bottom of the pulper tub at a position radially outwardly of the extraction plate 12, and the pulper will usually also be provided with a ragger 17.
  • the pulper 10 is continuously supplied with used corrugated board as indicated at 20, and extraction through plate 12 is carried out continuously by the pump 21 at a sufficiently rapid rate to limit the retention time of the board in the pulper tub to a short interval sufficient to effect the desired initial disintegration of the board and defibering of the corrugating medium while leaving the kraft liners in as large pieces as can be extracted through the perforations in the plate 12.
  • Tests indicate that under normal conditions, a retention time of the order of one minute is satisfactory for the purposes of the invention.
  • the slurry of defibered corrugating medium and pieces of kraft liner extracted from the tub is supplied by the pump 21 to a liquid cyclone 22 for removing heavy reject materials and then to a screening station 23 comprising one or more screens capable of separating the small particles of corrugating medium from the larger pieces of kraft sheet. Satisfactory results for this purpose have been obtained by the use of a vibrating screen wherein the screen plate has screening openings of about Va inch in diameter.
  • the stock transmitted by the openings in the screen or screens 23 is delivered to a series of processing stations indicated as a cleaning station 24, a dewatering station 25 and a baling station 26.
  • the equipment installed at each of these stations may be of any type conventionally used for these purposes in the treatment of reclaimed waste paper pulp, and wherein the screening openings may be round holes, slots, or other shaped openings.
  • the material too large for transmission by the screening station 23 is delivered to a second pulper which may be of the same construction as the pulper 10, including a similar rotor 31 and extraction plate 32, except that the holes in the extraction plate 32 should be relatively small, e.g., Iii inch in diameter.
  • the pulper 30 does not require ajunk remover, but it is preferably equipped with an overflow device 33 for eliminating floating trash such as plastic sheets, tape and strings.
  • the discharge from the device 33 is shown as delivered by a pump 34 to a screening and defibering station 35 from which accepted stock is recycled at 36 and returned to the pulper 30, and the reject material is discharged at 37 as trash. Satisfactory results have been obtained utilizing apparatus of the type disclosed in Herbert US. Pat. 3,698,649 at the station 35.
  • the stock extracted from the pulper 30 is delivered by a pump 40 to a series of cleaning, screening and other processing stations which may comprise any conventional equipment suitable for eliminating fines and high specific gravity contaminants from the stock and for otherwise improving its characteristics in conventional manner in preparation for its reuse.
  • This part of the system is accordingly represented diagrammatically as a cleaning station 41, screening station 42, dewatering station 43 and baling station 44. Since the pulp fraction delivered to the baling station 26 includes the majority of the shorter fibers, it may be practical to increase the yield of that fraction by recycling rejected fines from the screening station 42 to the other side of the system, as indicated by the line 45.
  • each [00 tons of waste corrugated board included approxi mately 10 tons of light and heavy trash, 16 tons of NSSC fiber and 74 tons of kraft fiber, and it was further determined that the pulps included 60 tons of fibers long enough for retention on 35-mesh screen and 17 tons of fines capable of passage through lOO-mesh screen.
  • Treatment of this material in accordance with the process of the invention as described resulted in a yield of the following two fractions from each tons of initial charge:
  • fraction A contained the majority of the NSSC fiber originally present in the charge but only a minor portion of the kraft fiber originally delivered to the pulper, and it will further be seen that fraction B contained by far the larger portion of long fiber pulp and only less than 10% fines.
  • Fraction B is accordingly of sufficiently high grade for many uses for which repulped corrugated board would be unacceptable. For example, it can be mixed with other pulps, or substituted for some virgin kraft for products normally made entirely of virgin kraft, such as liner board. It can be used unmixed as the surface layer of liner board and other multi-layer products, and its quality is such as to warrant additional upgrading process steps such, for example, as digesting and bleaching.
  • Fraction A is also suitable for many purposes, having particularly in mind that it has a higher kraft content and a higher percentage of long fibered pulp than the original corrugating medium. It is therefore particularly well suited for reuse in corrugating medium, and it may have additional NSSC fiber mixed therewith for that purpose. If it is to be so used, minimal cleaning will be required because any particles of bark and shives which may be present are not objectionable in corrugating medium. For other uses, the extent to which it is upgraded by cleaning or other treatment depends upon the appearance desired for the finished product.
  • the pulper 50 includes a rotor 51, extraction plate 52, outlet chamber 53, discharge line 54 and junk remover 55 similar to the elements 11-15 in FIG. 1. but the perforations in the extraction plate 52 should be of relatively small size, e.g., Va inch in diameter.
  • the pulper 50 is initially charged with sufficient water to fill the pulper tub to the normal level for conventional pulping, and with the rotor operating, the batch of corrugated board is added as rapidly as pulping conditions permit. As soon as pulping commences, extraction is started to remove the particles of sufficiently small size to pass through the 3,925, I SO small holes in the extraction plate 52, and water is added to maintain an effectively constant level.
  • Extraction is continued as the balance of the batch is added together with sufficient water to maintain the liquid level in the pulper.
  • extraction continues until the level in the pulper has dropped as far as possible and approximately one-third of the charge has been extracted. During this interval, water may be added at a reduced rate to prevent clogging of the extraction plate, and operation of the rotor is also continued.
  • the slurry extracted through the plate 52 is shown as delivered by discharge line 54 and pump 58 through a liquid cyclone 60 and shut-off valve 61 to a storage chest 62, and from there it is indicated as supplied at 63 to a process line which may be of the same characteristics shown in FIG. 1 commencing with the cleaning station 24.
  • the valve 61 should be a two-way valve having a connection 64 leading to a chest 65 from which the stock may be supplied at 66 to the appropriate process line, which may be of the same characteristics shown in FIG. 1 commencing with the station 41.
  • the pulper 50 may have the balance of its contents dumped through a separate outlet 70 and valve 71 to a supply line 72 and pump 73 connected through a liquid cyclone 74 with the storage chest 65.
  • the connection 66 from chest 65 should lead to a second defibering station corresponding with the pulper 30 in FIG. 1.
  • waste paper products consist essentially of corrugated paperboard comprising at least one outer layer of a substantially lower degree of defiberability than the corrugated layer thereof.
  • a process as defined in claim 1 comprising the further step of subjecting at least one of said defiberec products to further treatment.

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  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
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US34849673 1973-04-06 1973-04-06 Selective reclamation of waste paper products Expired - Lifetime US3925150A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US34849673 US3925150A (en) 1973-04-06 1973-04-06 Selective reclamation of waste paper products
CA191,397A CA1015696A (en) 1973-04-06 1974-01-31 Selective reclamation of waste paper products
FR7406854A FR2224588B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-04-06 1974-02-28
DE2416251A DE2416251A1 (de) 1973-04-06 1974-04-03 Selektive wiedergewinnung von abfallpapierprodukten
JP3702474A JPS49126902A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-04-06 1974-04-03
GB1516074A GB1460178A (en) 1973-04-06 1974-04-05 Selective reclamation of waste paper constituents

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US34849673 US3925150A (en) 1973-04-06 1973-04-06 Selective reclamation of waste paper products

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US3925150A true US3925150A (en) 1975-12-09

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US (1) US3925150A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS49126902A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1015696A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2416251A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2224588B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1460178A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030671A (en) * 1976-06-04 1977-06-21 The Black Clawson Company Apparatus for pulping waste paper materials
USRE29746E (en) * 1975-06-16 1978-08-29 The Black Clawson Company Apparatus for pulping waste paper materials
US4123489A (en) * 1977-05-17 1978-10-31 Flett Development Company Method for converting waste paper products into useful forms
US4168199A (en) * 1977-07-08 1979-09-18 Commonwealth Scientific And Industrial Research Organization Recovery of cellulosic fibres from foil laminated materials
US4200486A (en) * 1976-07-27 1980-04-29 Vyskumny Ustav Papieru A Celulozy Method of and apparatus for reclaiming metals and plastics from scrap paper
US4231526A (en) * 1977-12-30 1980-11-04 J. M. Voith Gmbh Process and apparatus for treating waste paper
WO1981002030A1 (en) * 1980-01-08 1981-07-23 Casco Ab Use of polyalkylene oxides for the separation of cellulose fibres
US4332638A (en) * 1979-03-06 1982-06-01 J. M. Voith Gmbh Method and apparatus for the recovery of a suspension of fibrous material from mixed waste paper
US4385997A (en) * 1980-01-21 1983-05-31 Reed Ltd. Method and apparatus for preconditioning laminated paper for recycling
US4538765A (en) * 1981-12-10 1985-09-03 Escher Wyss Gmbh Method for defiberizing waste paper in a thick stock range
US4781793A (en) * 1986-07-04 1988-11-01 Valmet Oy Method for improving paper properties in multiply paper using long and short fiber layers
US4812205A (en) * 1988-01-25 1989-03-14 Beloit Corporation Process for secondary fibre processing
US4891099A (en) * 1988-01-25 1990-01-02 Beloit Corporation Apparatus for secondary fibre processing
US5007590A (en) * 1990-01-23 1991-04-16 Itex Enterprises, Inc. Apparatus and method for mixing solid or semi-solid wastes with additives
US5028010A (en) * 1989-12-18 1991-07-02 Itex Enterprises, Inc. Apparatus for mixing solid or semi-solid wastes with additives
US5133832A (en) * 1991-07-08 1992-07-28 The Black Clawson Company Process and system for preparation of waste paper stock with short and long fiber fractionation
US5390860A (en) * 1992-05-15 1995-02-21 Tetra Laval Holdings & Finance Sa Method and apparatus for separating paper fiber and plastics from mixed waste materials and products obtained thereby
US5421526A (en) * 1991-05-29 1995-06-06 Tetra Laval Holdings & Finance Sa Method of recovering individual component parts from packaging material waste
EP0732442A3 (de) * 1995-03-17 1997-11-05 Voith Sulzer Stoffaufbereitung GmbH Verfahren zur Behandlung von Altpapier sowie Anlage zu seiner Durchführung
US6017415A (en) * 1997-09-05 2000-01-25 International Paper Company Method for co-pulping waste cellulosic material and wood chips
US6702925B2 (en) 2000-12-22 2004-03-09 Vibre-Tech Llc Method and apparatus for forming a paper or tissue web
US20040140077A1 (en) * 2001-12-21 2004-07-22 Bricco Michael J. Method and apparatus for forming a paper or tissue web
US20060163393A1 (en) * 2002-09-02 2006-07-27 Sun-Ho Chung Apparatus and method for automatically defibering and extracting kraft pulp from old corrugated cardboard
US20090179098A1 (en) * 2008-01-10 2009-07-16 Stephen Williams Powder Reclamation Device for Mill Systems
CN106436432A (zh) * 2015-08-11 2017-02-22 玖龙纸业(天津)有限公司 一种瓦楞纸板制作方法
SE2150622A1 (en) * 2021-05-17 2022-11-18 Stora Enso Oyj Multiply containerboard for use in corrugated board
CN115704190A (zh) * 2021-08-10 2023-02-17 安德里茨（中国）有限公司 再生纤维原料处理系统与再生纤维原料处理方法
US20230182981A1 (en) * 2021-12-15 2023-06-15 Westrock Shared Services, Llc Corrugated cardboard, corrugated box, and method for packaging a wet product
CN120115510A (zh) * 2025-04-17 2025-06-10 河北海菱印刷有限公司 一种包装印刷固体废物收集装置及收集方法

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2514162B2 (de) * 1975-03-29 1977-02-03 Anlage zur Aufbereitung von Altpapier J.M. Voith GmbH, 7920 Heidenheim Anlage zur aufbereitung von altpapier
CH649112A5 (de) * 1980-10-03 1985-04-30 Escher Wyss Gmbh Verfahren zum fraktionieren von aus altpapier gewonnenem faserstoff sowie anlage zur ausfuehrung des verfahrens.
GB2095263B (en) * 1981-03-23 1985-05-30 Nippon Oils & Fats Co Ltd Anti-fouling composition
SE435941B (sv) * 1983-03-14 1984-10-29 Mo Och Domsjoe Ab Forfarande for framstellning av forbettrad slipmassa
JP2523789Y2 (ja) * 1990-10-26 1997-01-29 相川鉄工株式会社 パルパー
FI99032C (fi) * 1994-05-13 1999-10-20 Valmet Corp Menetelmä keräyspaperin kuiduttamiseksi
DK0829571T3 (da) * 1996-09-12 2007-08-20 Hans-Joachim Boltersdorf Fremgangsmåde til udvinding af fiberstof og plast af rejekter fra pulperbortskaffelsessystemer
RU2177060C1 (ru) * 2001-03-29 2001-12-20 Открытое акционерное общество "Всероссийский научно-исследовательский институт целлюлозно-бумажной промышленности" Способ переработки целлюлозосодержащих отходов
CN103790064B (zh) * 2014-02-20 2017-03-01 安德里茨（中国）有限公司 二次纤维精筛系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641164A (en) * 1946-07-08 1953-06-09 Hill Harold Sanford Method for processing fibrous pulp
US2697661A (en) * 1946-07-31 1954-12-21 Alton Box Board Co Digestion of pulp
US2913362A (en) * 1954-06-14 1959-11-17 Internat Pulp Products Inc Method of producing cellulosic pulp
US3301745A (en) * 1963-04-26 1967-01-31 Scott Paper Co Pulp processing method for mixed cellulosic materials
US3698649A (en) * 1970-12-18 1972-10-17 Black Clawson Co Screening apparatus
US3833460A (en) * 1972-09-27 1974-09-03 Little Inc A Dry method for separating paper constitutents for recovery and recycling
US3884750A (en) * 1972-09-25 1975-05-20 Little Inc A Method of recovering separate fiber fractions from corrugated board

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641164A (en) * 1946-07-08 1953-06-09 Hill Harold Sanford Method for processing fibrous pulp
US2697661A (en) * 1946-07-31 1954-12-21 Alton Box Board Co Digestion of pulp
US2913362A (en) * 1954-06-14 1959-11-17 Internat Pulp Products Inc Method of producing cellulosic pulp
US3301745A (en) * 1963-04-26 1967-01-31 Scott Paper Co Pulp processing method for mixed cellulosic materials
US3698649A (en) * 1970-12-18 1972-10-17 Black Clawson Co Screening apparatus
US3884750A (en) * 1972-09-25 1975-05-20 Little Inc A Method of recovering separate fiber fractions from corrugated board
US3833460A (en) * 1972-09-27 1974-09-03 Little Inc A Dry method for separating paper constitutents for recovery and recycling

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE29746E (en) * 1975-06-16 1978-08-29 The Black Clawson Company Apparatus for pulping waste paper materials
US4030671A (en) * 1976-06-04 1977-06-21 The Black Clawson Company Apparatus for pulping waste paper materials
US4200486A (en) * 1976-07-27 1980-04-29 Vyskumny Ustav Papieru A Celulozy Method of and apparatus for reclaiming metals and plastics from scrap paper
US4123489A (en) * 1977-05-17 1978-10-31 Flett Development Company Method for converting waste paper products into useful forms
US4168199A (en) * 1977-07-08 1979-09-18 Commonwealth Scientific And Industrial Research Organization Recovery of cellulosic fibres from foil laminated materials
US4231526A (en) * 1977-12-30 1980-11-04 J. M. Voith Gmbh Process and apparatus for treating waste paper
US4332638A (en) * 1979-03-06 1982-06-01 J. M. Voith Gmbh Method and apparatus for the recovery of a suspension of fibrous material from mixed waste paper
WO1981002030A1 (en) * 1980-01-08 1981-07-23 Casco Ab Use of polyalkylene oxides for the separation of cellulose fibres
US4385997A (en) * 1980-01-21 1983-05-31 Reed Ltd. Method and apparatus for preconditioning laminated paper for recycling
US4538765A (en) * 1981-12-10 1985-09-03 Escher Wyss Gmbh Method for defiberizing waste paper in a thick stock range
US4781793A (en) * 1986-07-04 1988-11-01 Valmet Oy Method for improving paper properties in multiply paper using long and short fiber layers
US4812205A (en) * 1988-01-25 1989-03-14 Beloit Corporation Process for secondary fibre processing
US4891099A (en) * 1988-01-25 1990-01-02 Beloit Corporation Apparatus for secondary fibre processing
US5028010A (en) * 1989-12-18 1991-07-02 Itex Enterprises, Inc. Apparatus for mixing solid or semi-solid wastes with additives
US5353998A (en) * 1989-12-18 1994-10-11 Itex Enterprises, Inc. Method for mixing solid or semi-solid wastes with additives
US5007590A (en) * 1990-01-23 1991-04-16 Itex Enterprises, Inc. Apparatus and method for mixing solid or semi-solid wastes with additives
US5421526A (en) * 1991-05-29 1995-06-06 Tetra Laval Holdings & Finance Sa Method of recovering individual component parts from packaging material waste
US5133832A (en) * 1991-07-08 1992-07-28 The Black Clawson Company Process and system for preparation of waste paper stock with short and long fiber fractionation
US5390860A (en) * 1992-05-15 1995-02-21 Tetra Laval Holdings & Finance Sa Method and apparatus for separating paper fiber and plastics from mixed waste materials and products obtained thereby
EP0732442A3 (de) * 1995-03-17 1997-11-05 Voith Sulzer Stoffaufbereitung GmbH Verfahren zur Behandlung von Altpapier sowie Anlage zu seiner Durchführung
US6017415A (en) * 1997-09-05 2000-01-25 International Paper Company Method for co-pulping waste cellulosic material and wood chips
US6702925B2 (en) 2000-12-22 2004-03-09 Vibre-Tech Llc Method and apparatus for forming a paper or tissue web
US7169262B2 (en) 2000-12-22 2007-01-30 Vibre-Tech Llc Method and apparatus for forming a paper or tissue web
US20040149415A1 (en) * 2000-12-22 2004-08-05 Vibre-Tech Llc Method and apparatus for forming a paper or tissue web
US7101462B2 (en) 2001-12-21 2006-09-05 Vibre-Tech, Llc Method and apparatus for forming a paper or tissue web
US20040140077A1 (en) * 2001-12-21 2004-07-22 Bricco Michael J. Method and apparatus for forming a paper or tissue web
US20070068644A1 (en) * 2001-12-21 2007-03-29 Vibre-Tech, Llc. Method and apparatus for forming a paper or tissue web
US20060163393A1 (en) * 2002-09-02 2006-07-27 Sun-Ho Chung Apparatus and method for automatically defibering and extracting kraft pulp from old corrugated cardboard
US20090179098A1 (en) * 2008-01-10 2009-07-16 Stephen Williams Powder Reclamation Device for Mill Systems
CN106436432A (zh) * 2015-08-11 2017-02-22 玖龙纸业(天津)有限公司 一种瓦楞纸板制作方法
SE2150622A1 (en) * 2021-05-17 2022-11-18 Stora Enso Oyj Multiply containerboard for use in corrugated board
WO2022243818A1 (en) * 2021-05-17 2022-11-24 Stora Enso Oyj Multiply containerboard for use in corrugated board
SE544926C2 (en) * 2021-05-17 2023-01-10 Stora Enso Oyj Multiply containerboard for use in corrugated board
CN115704190A (zh) * 2021-08-10 2023-02-17 安德里茨（中国）有限公司 再生纤维原料处理系统与再生纤维原料处理方法
US20230182981A1 (en) * 2021-12-15 2023-06-15 Westrock Shared Services, Llc Corrugated cardboard, corrugated box, and method for packaging a wet product
CN120115510A (zh) * 2025-04-17 2025-06-10 河北海菱印刷有限公司 一种包装印刷固体废物收集装置及收集方法

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GB1460178A (en) 1976-12-31
DE2416251A1 (de) 1974-10-24
FR2224588B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-01-06
CA1015696A (en) 1977-08-16
JPS49126902A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-12-05
FR2224588A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-10-31

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