US3849184A - Treatment of paperboard - Google Patents

Treatment of paperboard Download PDF

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Publication number
US3849184A
US3849184A US20889671A US3849184A US 3849184 A US3849184 A US 3849184A US 20889671 A US20889671 A US 20889671A US 3849184 A US3849184 A US 3849184A
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US
United States
Prior art keywords
paperboard
weight
percent
coated
coating
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Expired - Lifetime
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English (en)
Inventor
A Roberts
M Roberts
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lever Brothers Co
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Lever Brothers Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to GB1983669A priority Critical patent/GB1301100A/en
Priority to DE2018088A priority patent/DE2018088B2/de
Priority to FR7014078A priority patent/FR2045439A5/fr
Priority to CH576970A priority patent/CH532685A/de
Priority to BE749147D priority patent/BE749147A/xx
Priority to AT349770A priority patent/AT298228B/de
Priority to NL7005635A priority patent/NL158865B/xx
Application filed by Lever Brothers Co filed Critical Lever Brothers Co
Priority to US20889671 priority patent/US3849184A/en
Application granted granted Critical
Publication of US3849184A publication Critical patent/US3849184A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/18—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising waxes
    • 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
    • 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
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/266—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension of base or substrate
    • 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
    • Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31801—Of wax or waxy material
    • Y10T428/31804—Next to cellulosic
    • Y10T428/31808—Cellulosic is paper
    • Y10T428/31812—Glassine 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31975—Of cellulosic next to another carbohydrate
    • Y10T428/31978—Cellulosic next to another cellulosic
    • Y10T428/31982—Wood or paper

Definitions

  • ABSTRACT A coated paperboard of improved physical strength properties is provided where at least one surface of a paperboard, preferably containing a major proportion of low strength cellulosic fibres, is coated with an aqueous dispersion, the solids content of which comprises a water-soluble lignosulphonate, a non-reactive hydrophobic waxy material and, optionally, a high molecular weight polysaccharide.
  • the improved physical strength characteristics are retained to a considerable extent even under tropical conditions of humidity and temperature.
  • This invention relates to an improved process for the coating (surface application) of paperboard and is particularly concerned with an economic process of such a nature which provides a product of improved physical strength properties which are retained to a considerable extent even under tropical conditions of humidity and temperature.
  • paperboard shall be understood as referring to a non-laminated product of basis weight within the range 130 850 g/m comprising a ply or a plurality of intimately bonded plies consisting essentially of cellulosic fibrous material, that is made on a board machine.
  • the process of this invention is applicable to a paperboard possessing a caliper (i.e. thickness) in the range 0.004 0.050 inch (0.1 1.3 mm) and particularly applicable to a paperboard of caliper 0.008 0.050 inch (0.2 1.3 mm).
  • the process of this invention is advantageously applied to a paperboard that is prepared from a cellulosic pulp comprising a major proportion of low strength fibrous material.
  • These paperboards such as unlined chipboard, chemical pulp lined chipboard and corrugating medium are used for the production of carton board, rigid board, pasted board and corrugated board.
  • the term physical strength properties as applied to paperboard can be measured in relation to, for example, stiffness, rigidity, Concora strength or Mullen value.
  • the stiffness of a paperboard is defined as the degree of resistance offered by the paperboard when it is bent by application of a force under specified conditions. Its value is conveniently determined by the method set out in B.S. 3748/1964, using an instrument such as a Taber tester. The Taber tester measures stiffness as a bending moment which is expressed in terms of Taber units. The value of this term is dependent upon a number of factors including the thickness of the paperboard, the method by which the paperboard is produced, the elastic modulus of the cellulosic fibrous material used to form the paperboard and the direction in which the measurements have been made.
  • the rigidity of the paperboard is defined as the degree of resistance offered by the paperboard when it is deformed by application of an edgewise force under specified conditions. Such a determination of rigidity is set out in TAPPl Standard T472 (Su 68). Measurement of this term is conveniently made by using a ring-crush holder on a Gaydon instrument.
  • Concora strength is a measurement of the resistance to crush that is offered by a paperboard (corrugating medium) to a force applied at right angles to the corrugating plane. The measurement is conveniently made by following the method set out in TAPPl Specification T809 (Su 66) and using a Gaydon instrument.
  • a coated paperboard comprising:
  • a paperboard consisting of a ply or of a plurality of intimately bonded plies consisting essentially of cellulosic fibrous material
  • a coating on at least one surface thereof comprisa. a water-soluble lignosulphonate salt and b. a non-reactive, hydrophobic waxy material having a melting point higher than the temperature of application of said coating to said paperboard,
  • said paperboard having a thickness of 0.004 0.050 inch and a basis weight of 850 g/m, said watersoluble lignosulphonate salt and said non-reactive hydrophobic waxy material being present in an amount effective to improve the physical strength characteristics of said paperboard.
  • a process for coating at least one surface of a paperboard with an aqueous 5 60% w/w dispersion the solids content of said dispersion comprising a watersoluble lignosulphonate salt and an effective amount of a non-reactive hydrophobic waxy material, the melting point of said waxy material being such that the said dispersion remains stable at the temperature of application to said paperboard.
  • the solids content of the aqueous dispersion should comprise 95 99 percent by weight of the lignosulphonate salt and 5 1 percent by weight of the non-reactive hydrophobic waxy material.
  • the stiffness and resistance to deformation and burst of a paperboard can be improved by coating at least one surface with an aqueous dispersion, the solids content of which comprises 47.5 95 percent by weight water-soluble lignosulphonate salt, 5 1 percent by weight of the non-reactive hydrophobic waxy material and 47.5 4 percent by weight of a water-swellable, high molecular weight polysaccharide.
  • Such a material include corn starch, potato starch, pregelatinised starch, oxidised starch, starch ethers such as hydroxy ethyl starch, esterified bifractional starch or a mannogalactan gum such as guar gum.
  • the resistance to burst of the paperboard is indicated by determination of its Mullen value as set out in B5. 3137/1959.
  • the paperboard used in this invention can be prepared from mechanical pulp, a hybrid of chemical and mechanical pulp, a pulp derived from secondary fibres, pulp screenings or any mixtures of these materials.
  • a pulp derived from secondary fibres for example, mixed waste paper, container waste or news waste is a preferred material since the strength properties of such a material are not noticeably improved.
  • the upper limit of the solids content of the aqueous dispersion is primarily determined by the viscosity and the stability of the dispersion at its application temperature.
  • the lower limit of solids content is determined by the consequential pick-up of solids by the paperboard during application of the dispersion.
  • a preferred range of solids content varies from 20 40% w/w.
  • the preferred range of application temperature is between and 40C and should be below the melting point ofthe hydrophobic waxy material. The higher the application temperature the greater will be the likelihood of the coating dispersion breaking down with consequential deposition of gross amounts of waxy mateial onto the paperboard.
  • the parameters of the process of this invention are desirably adjusted so that the amount of lignosulphonate and waxy material taken up by the paperboard varies between 0.5 and 15 percent by weight of the paperboard.
  • the lignosulphonate salt should be soluble in water and desirably contain a minimum of hydroscopic impurities such as monoor disaccharides. Calcium, sodium, magnesium, ammonium and aluminium lignosulphonate salts are commonly available. Sodium lignosulphonate or calcium lignosulphonate are preferred materials for the process of this invention.
  • the hydrophobic waxy material can be of an animal, vegetable, petroleum or synthetic origin and should be such as to form a stable dispersion with the aqueous lignosulphonate solution and have a melting point such that the dispersion remains stable at the temperature of application to the paperboard. Further, the waxy material should remain chemically stable in the presence of paperboard, water and lignosulphonate salt.
  • Representative examples of a waxy material of animal origin include beeswax and lanolin.
  • Carnauba wax is an example ofa wax of vegetable origin while of the many types of petroleum waxes there may be included ozokerite, montan wax, microcrystalline petroleum waxes and various grades of paraffin hydrocarbon waxes.
  • Low molecular weight polyethylene or polypropylene, hydrogenated castor oil, cetyl alcohol or oxidised montan wax are examples of waxes of synthetic origin.
  • the waxy material can be dispersed directly into the aqueous solution of the lignosulphonate salt. It is also convenient to form an initial aqueous dispersion of the waxy material with the aid of a surface active agent which is inert to the lignosulphonate salt and subsequently add this dispersion to the lignosulphonate solution.
  • the solid lignosulphonate salt can if desired also be added to a suitable aqueous dispersion of the waxy material.
  • the amount of waxy material preferably used in the aqueous dispersion lies between 1 and 2 percent by weight of the solids content of the dispersion.
  • the aqueous dispersion of lignosulphonate and waxy material is conveniently applied to the surface of a paperboard by an on machine process or an off machine process.
  • the paperboard can be either partially or completely dried prior to the application.
  • the aqueous dispersion is preferably applied to the paperboard by means of a size press, a calender water-box or a spray. The pick-up of the dispersion by the paperboard depends upon the temperature of application, the solids content of the applied dispersion, the degree of sizing of the base paperboard and the machine speed.
  • the paperboard prepared according to the process of the present invention exhibits an improved stiffness and rigidity (even after subjection to tropical humidity conditions) which is higher than in the case of similar paperboards which have not been thus treated.
  • COMPARATIVE EXAMPLE 40 parts by weight calcium lignosulphonate were dissolved in parts by weight water at 50C. 4 5 mls of the solution were metered onto the surface of a sample of an air dried paperboard (derived entirely from a waste paper pulp) measuring 33 X 22.9 cm and processing a basis weight of 558 g/m.
  • a sample of the coated paperboard was dried at 105C, weighted and subsequently equilibrated under temperate conditions (65% RH/C) and its CD stiffness determined in Taber units.
  • the coated sample had a basis weight of 680.5 g/m and a stiffness of 406 Taber units.
  • EXAMPLE 2 A dispersion having a composition as described in Example 1 was prepared. This dispersion was used to coat the unlined surface of a white lined paperboard of caliper 0.021 inches (0.52 mm) and having a basis weight of 370 g/m A sample of the treated paperboard was dried at C, weighed and equilibrated under tropical conditions of humidity and temperature (90% RH/40C) and its CD stiffness was determined. The coated paperboard had a basis weight of 377.5 g/m The CD stiffness of the treated board had improved by 22 percent when compared with the CD stiffness of untreated paperboard equilibrated under similar tropical conditions.
  • EXAMPLE 3 20 parts by weight calcium ligno-sulphonate containing 10 percent sugar impurity were dissolved in 80 parts by weight water. 0.5 part by weight of a 40% w/w aqueous dispersion of paraffin wax, melting point 40C, (containing 2 percent calcium lignosulphonate by weight of the wax as a dispersing agent) was added to this solution with agitation. A corrugating grade paperboard of 0.009 inch (0.21 mm) caliper and having a basis weight of 136 g/m was coated on one side with this prepared dispersion at 25C. The coated paperboard had a basis weight of 140 g/m The coated paperboard was equilibrated at 65% RH/20C, subsequently corrugated and then subjected to a crush test using a Gaydon crush tester.
  • EXAMPLE 4 20 parts by weight sodium lignosulphonate was dissolved in 80 part by weight water. 0.5 part by weight of a 40% w/w aqueous dispersion of paraffin wax (melting point 40C) was added to this solution with vigorous agitation.
  • a paperboard similar to that used in Example 3 was coated with the above prepared dispersion to give a paperboard having a basis weight of 140 g/m
  • a sample of this treated paperboard was corrugated and its Concora value determined. lt was found that the treated paperboard gave Concora values approximately 40 percent higher than those obtained using a sample of untreated paperboard.
  • EXAMPLE 5 20 parts by weight calcium lignosulphonate and 6 parts by weight farina starch were dissolved in 74 parts by weight water. 0.5 part by weight of a 40% w/w aqueous dispersion of paraffin wax, melting point 40C,
  • EXAMPLE 6 30 parts by weight of calcium lignosulphonate were dissolved in 70 parts by weight water at a temperature of 50C. 0.75 part by weight ofa 40% w/w aqueous carnauba wax dispersion were subsequently stirred into this solution.
  • a white lined paperboard of basis weight 378 g/m and a caliper 0.020 inch (0.50 mm) was coated on its unlined surface with the above dispersion by means of two calender water box applications. After equilibration at 65% RHl20C it was found that the CD stiffness had increased by 40 percent (from 62 to 87 Taber units) as compared with the CD strength of a similar but uncoated white lined paperboard which had been equilibrated under similar conditions.
  • the coated paperboard had a basis weight of 385.5 g/m EXAMPLE 7
  • Three aqueous dispersions were prepared containing respectively a 5, 20 and 40 percent content of the cal-- cium lignosulphonate used in Example 1 and 1 percent per 0.027 inch (0.69 mm) was treated with a double:
  • paraffin wax (melting point 40C).
  • the solids content of this aqueous dispersion was about 17 percent.
  • the basis weight of the coated paperboard was 241.6 glm
  • the rigidity of a sample of the coated and uncoated paperboard was subsequently determined.
  • the rigidity of the coated paperboard was 29.4 Kg while that of the uncoated paperboard was 26.8 Kg (both equilibrated at RH/20C).
  • EXAMPLE 9 White lined chipboard of basis weight 295 g/m and caliper 0.0175 inch was coated with an aqueous dispersion containing 40 percent by weight calcium lignosulphonate and 1 percent by weight paraffin wax (based on the calcium lignosulphonate). A single application of this dispersion was given to the unlined surface of this chipboard. The percentage pick-up of solids was 2.7 percent (8.1 g/m). The coated paperboard had a basis weight of 303.1 g/m and showed a 35 percent increase in CD stiffness.
  • a sample of the above white lined chipboard was also coated with an aqueous dispersion containing 40 percent by weight calcium lignosulphonate and 20 percent by weight paraffin wax (based on the weight of calcium lignosulphonate).
  • the coated paperboard showed a lower increase (23 percent) in CD stiffness as compared with the board treated in the first part of this example. There was a 25 percent increase in the water resistance of this board.
  • a coated paperboard comprising: i. a paperboard consisting of at least one ply consisting essentially of cellulosic fibrous materials, and ii. a coating on at least one surface thereof comprismg: a. to 99 percent by weight of a water-soluble lignosulphonate salt and b. from 1 to 5 percent by weight of a non-reactive hydrophobic waxy material having a melting point higher than the temperature of application of said coating to said paperboard said paperboard having a thickness of 0.004 to 0.050 inch and a basis weight of to 850 g/m said coating being present in an amount effective to improve the physical strength characteristics of said paperboard.
  • EXAMPLE 8 3. A coated paperboard comprising A paperboard having middles and backs prepared? from waste paper pulp, a single lining of unbleached Kraft fibre and a basis weight of 226 g/m was coated; 65
  • lignosulphonate salt and b. from 1 to 5 percent by weight of a nonnonreactive hydrophobic waxy material having a melting point higher than the temperature of application of said coating to said paperboard, and
  • a polysaccharide selected from the group consisting of corn starch, potato starch, pre-gelatinised starch, oxidised starch and esterified bifractional starch, starch ether and a mannogalactan gum,
  • said paperboard having a thickness of 0.004 to 0.050

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US20889671 1969-04-18 1971-12-16 Treatment of paperboard Expired - Lifetime US3849184A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB1983669A GB1301100A (en) 1969-04-18 1969-04-18 Treatment of paperboard
DE2018088A DE2018088B2 (de) 1969-04-18 1970-04-15 Verfahren zum Behandeln von Pappe
CH576970A CH532685A (de) 1969-04-18 1970-04-17 Verfahren zur Verbesserung der Festigkeit von Papier oder Pappe
BE749147D BE749147A (fr) 1969-04-18 1970-04-17 Traitement du carton
FR7014078A FR2045439A5 (en, 2012) 1969-04-18 1970-04-17
AT349770A AT298228B (de) 1969-04-18 1970-04-17 Verfahren zum Behandeln mindestens einer Fläche von Papier oder Pappe
NL7005635A NL158865B (nl) 1969-04-18 1970-04-17 Werkwijze ter verbetering van de fysische sterkte-eigenschappen van karton, alsmede het daarmede verkregen karton.
US20889671 US3849184A (en) 1969-04-18 1971-12-16 Treatment of paperboard

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB1983669A GB1301100A (en) 1969-04-18 1969-04-18 Treatment of paperboard
US2712170A 1970-04-09 1970-04-09
US20889671 US3849184A (en) 1969-04-18 1971-12-16 Treatment of paperboard

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US3849184A true US3849184A (en) 1974-11-19

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US20889671 Expired - Lifetime US3849184A (en) 1969-04-18 1971-12-16 Treatment of paperboard

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US (1) US3849184A (en, 2012)
AT (1) AT298228B (en, 2012)
BE (1) BE749147A (en, 2012)
CH (1) CH532685A (en, 2012)
DE (1) DE2018088B2 (en, 2012)
FR (1) FR2045439A5 (en, 2012)
GB (1) GB1301100A (en, 2012)
NL (1) NL158865B (en, 2012)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5338404A (en) * 1992-03-11 1994-08-16 International Paper Company Method of forming a lignin reinforced cellulosic product
US5501773A (en) * 1993-05-28 1996-03-26 Calgon Corporation Cellulosic, modified lignin and cationic polymer composition and process for making improved paper or paperboard
US5501772A (en) * 1993-05-28 1996-03-26 Calgon Corporation Cellulosic modified lignin and cationic polymer composition and process for making improved paper or paperboard
US5567277A (en) * 1993-05-28 1996-10-22 Calgon Corporation Cellulosic, modified lignin and cationic polymer composition and process for making improved paper or paperboard
EP1028062A1 (en) * 1999-02-12 2000-08-16 Fort James Corporation A paperboard container having enhanced rigidity and a method of making the same
US6114471A (en) * 1998-11-12 2000-09-05 The Proctor & Gamble Company Strengthening compositions and treatments for lignocellulosic materials
US6194057B1 (en) 1998-11-12 2001-02-27 Paper Technology Foundation Inc. Partially impregnated lignocellulosic materials
US6211357B1 (en) 1999-12-09 2001-04-03 Paper Technology Foundation, Inc. Strengthening compositions and treatments for lignocellulosic materials
US6281350B1 (en) 1999-12-17 2001-08-28 Paper Technology Foundation Inc. Methods for the reduction of bleeding of lignosulfonates from lignosulfonate-treated substrates
US6537615B2 (en) 1998-11-12 2003-03-25 Paper Technology Foundation Inc. Steam-assisted paper impregnation
US6537616B2 (en) 1998-11-12 2003-03-25 Paper Technology Foundation Inc. Stam-assisted paper impregnation
EP2014829A1 (en) * 2007-07-13 2009-01-14 Sugar Industry Innovation Pty Ltd A method for coating a paper product
CN103233393A (zh) * 2013-04-03 2013-08-07 安徽百翼生物科技有限公司 一种聚羧酸硬纸板专用施胶剂的制备方法
CN105026512A (zh) * 2013-01-24 2015-11-04 佐治亚-太平洋化工品有限公司 包含疏水剂和稳定剂的组合物以及其制造和使用方法
CN106958168A (zh) * 2017-03-24 2017-07-18 合肥悦兰信息技术有限公司 一种纸浆助剂定量投放机构
CN108081680A (zh) * 2016-11-22 2018-05-29 I.G.纸板技术有限公司 结构元件
GB2617573A (en) * 2022-04-12 2023-10-18 Kemira Oyj Material having a barrier layer comprising lignosulfonate

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DE2615021A1 (de) * 1975-03-07 1976-10-21 Eric Sydney Prior Gegenstand aus fasermaterial
AT392809B (de) * 1988-07-12 1991-06-25 Hamburger Ag W Impraegniermittel fuer papier und verfahren zum impraegnieren von papier

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US1311964A (en) * 1919-08-05 Venor
CA702827A (en) * 1965-01-26 Biskup John Adhesive composition
CA731509A (en) * 1966-04-05 A. E. Blackmore Kenneth Water-base adhesive
US2857288A (en) * 1954-05-11 1958-10-21 Albrecht Philipp Method to produce adhesive

Non-Patent Citations (1)

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Title
Warth, A. H., The Chemistry & Technology of Waxes, 1956, pp. 636 640, TP 670 w25 1956 A4, Copy 145. *

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5338404A (en) * 1992-03-11 1994-08-16 International Paper Company Method of forming a lignin reinforced cellulosic product
US5501773A (en) * 1993-05-28 1996-03-26 Calgon Corporation Cellulosic, modified lignin and cationic polymer composition and process for making improved paper or paperboard
US5501772A (en) * 1993-05-28 1996-03-26 Calgon Corporation Cellulosic modified lignin and cationic polymer composition and process for making improved paper or paperboard
US5567277A (en) * 1993-05-28 1996-10-22 Calgon Corporation Cellulosic, modified lignin and cationic polymer composition and process for making improved paper or paperboard
US5647956A (en) * 1993-05-28 1997-07-15 Calgon Corporation Cellulosic, modified lignin and cationic polymer composition and process for making improved paper or paperboard
US6114471A (en) * 1998-11-12 2000-09-05 The Proctor & Gamble Company Strengthening compositions and treatments for lignocellulosic materials
US6537616B2 (en) 1998-11-12 2003-03-25 Paper Technology Foundation Inc. Stam-assisted paper impregnation
US6194057B1 (en) 1998-11-12 2001-02-27 Paper Technology Foundation Inc. Partially impregnated lignocellulosic materials
US6537615B2 (en) 1998-11-12 2003-03-25 Paper Technology Foundation Inc. Steam-assisted paper impregnation
US6663925B1 (en) 1999-02-12 2003-12-16 Fort James Corporation Paperboard container having enhanced rigidity and a method of making the same
EP1028062A1 (en) * 1999-02-12 2000-08-16 Fort James Corporation A paperboard container having enhanced rigidity and a method of making the same
US6211357B1 (en) 1999-12-09 2001-04-03 Paper Technology Foundation, Inc. Strengthening compositions and treatments for lignocellulosic materials
US6306464B2 (en) 1999-12-09 2001-10-23 Paper Technology Foundation Inc Strengthening compositions and treatments for lignocellulosic materials
US6620461B2 (en) 1999-12-17 2003-09-16 Paper Technology Foundation Inc. Methods for the reduction of bleeding of lignosulfonates from lignosulfonate-treated substrates
US6458419B2 (en) 1999-12-17 2002-10-01 Paper Technology Foundation Inc. Methods for the reduction of bleeding of lignosulfonates from lignosulfonate-treated substrates
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GB1301100A (en) 1972-12-29
NL7005635A (en, 2012) 1970-10-20
DE2018088B2 (de) 1973-10-25
BE749147A (fr) 1970-10-19
FR2045439A5 (en, 2012) 1971-02-26
CH532685A (de) 1973-01-15
AT298228B (de) 1972-04-25
NL158865B (nl) 1978-12-15
DE2018088C3 (en, 2012) 1974-05-30
DE2018088A1 (de) 1971-02-18

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