US20060266487A1 - Method for the production of tissue paper - Google Patents

Method for the production of tissue paper Download PDF

Info

Publication number
US20060266487A1
US20060266487A1 US11/497,061 US49706106A US2006266487A1 US 20060266487 A1 US20060266487 A1 US 20060266487A1 US 49706106 A US49706106 A US 49706106A US 2006266487 A1 US2006266487 A1 US 2006266487A1
Authority
US
United States
Prior art keywords
pulp suspension
suspension
tissue paper
consistency
paper web
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.)
Abandoned
Application number
US11/497,061
Other languages
English (en)
Inventor
Thomas Scherb
Luiz Silva
Rogerio Berardi
Dailo Oyakawa
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
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
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Assigned to VOITH PAPER PATENT GMBH reassignment VOITH PAPER PATENT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OYAKAWA, DAILO, BERARDI, ROGERIOR, SCHERB, THOMAS, SILVA, LUIZ CARLOS
Publication of US20060266487A1 publication Critical patent/US20060266487A1/en
Priority to US12/429,692 priority Critical patent/US20090205794A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D21F11/145—Making cellulose wadding, filter or blotting paper including a through-drying process
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/182—Drying webs by hot air through perforated cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper

Definitions

  • This invention relates to a method for the production of tissue paper and to a method for the production of a pulp suspension for use particularly for the production of tissue paper.
  • Tissue paper ideally displays a high absorbency and a high water absorption capacity coupled with a high tear resistance.
  • the absorbency and water absorption capacity are defined essentially by the volume and porosity of the tissue paper.
  • To increase the volume it was already proposed in the prior art in WO03/062528 to press the tissue paper web during production only on a zone basis in order to obtain only slightly pressed or unpressed voluminous regions and pressed regions of greater tear resistance.
  • the porosity and the permeability of the tissue paper are co-defined essentially by the refining degree of the fibers in the pulp suspension from which the tissue paper is produced.
  • a high refining degree gives rise to a high proportion of fines in the suspension, leading to a low porosity and permeability of the produced tissue paper web.
  • a high refining degree gives rise to a high water retention value for the fibers of the pulp suspension, making the tissue paper hard to dewater during its production process.
  • a high refining degree meaning a high proportion of fines, reduces through too low a porosity and permeability the dewaterability of the tissue paper web during its production, leading often to too low a dry content for high production speeds such as 1200 m/minute.
  • tissue paper of the type that is compressed only in some regions during its production so-called bulky tissue
  • the liquid remains stored particularly in the uncompressed or only slightly compressed regions when the tissue paper is only insufficiently dewatered due to too low a porosity and permeability.
  • the tissue paper has to be tear-resistant both in the unfinished state and as a finished product.
  • the tear resistance is influenced by both the production process and the refining degree of the fibers in the pulp suspension.
  • the tissue paper has to be compacted, meaning compressed, during its production.
  • the proportion of fines must be high in order to obtain a high tear resistance.
  • the requirements imposed on the tear resistance conflict in particular with the above mentioned requirements imposed on the water absorption capacity, the absorbency and the dewaterability.
  • the present invention is directed to a method for the production of a tissue paper web, with which it is possible to produce tear-resistant tissue paper with a high water absorption capacity and absorbency at a high level of productivity.
  • the present invention provides a method for the production of a pulp suspension which can be used in the method according to the invention for the production of a tissue web.
  • the method according to the invention for the production of a tissue paper web which is produced from a pulp suspension composed of fibers, provides for the pulp suspension to have a refining degree of less than 21° SR and to be of such condition that it is possible to produce from the pulp suspension a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) whose breaking length measured according to TAPPI 220 and TAPPI 494 at at least a specific refining degree (RD specific ) is greater than or equal to the value resulting from 0.55(km/SR)*(RD specific ⁇ 10° SR), whereby the specific refining degree is selected from a refining range from 15° SR to less than 21° SR, in particular 15° SR to 19° SR.
  • tissue paper web is provided when it is possible to produce from the pulp suspension a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) whose breaking length measured according to TAPPI 220 and TAPPI 494 at at least a specific refining degree (RD specific ) is greater than or equal to the value resulting from 0.55(km/SR)*(RD specific ⁇ 10° SR), whereby the specific refining degree is selected from a refining range from 15° SR to less than 21° SR, in particular 15° SR to 19° SR.
  • the laboratory sheet produced according to TAPPI 205 SP 95 has a gsm substance of 60 g/m 2 .
  • Tests have shown that a sufficient porosity of the produced tissue paper exists when the pulp suspension has a refining degree less than or equal to 19° SR, preferably less than or equal to 17° SR. Furthermore, tests have shown that the finished product has sufficient strength and can be produced at a high level of productivity, meaning at a high machine speed, when the breaking length of the laboratory sheet produced according to TAPPI 205 SP 95 (Rapid Köthen) at a specific refining degree (RD specific ) from 0.55° SR to 19° SR, preferably 15° SR to 17° SR is greater than or equal to the value which results from 0.55(km/SR)*(RD specific ⁇ 10° SR).
  • the refining degree of the pulp suspension used is preferably 19° SR or less, in particular preferably 17° SR or less. Through the reduction of the refining degree it is also possible to increase the dry content by 3-4% upstream from the Yankee drying cylinder.
  • tissue paper can be produced at a high machine speed, meaning 1200 m/min or more, when it is possible to produce from the pulp suspension at a maximum refining degree of 17° SR a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) with a breaking length of 4.0 km or more, preferably 4.3 km or more, measured according to TAPPI 220 and TAPPI 494.
  • the pulp suspension meets the requirements imposed on porosity, absorbency and tear resistance in particular when the fiber fraction of the pulp suspension is composed of cellulose for the greater part, preferably to 60% or more, in particular preferably 80% or more. Most particularly it is preferred for the fiber part of the pulp suspension to be formed from 100% cellulose.
  • the tissue paper web can be effectively dewatered during its production in order to obtain a satisfactory dry content when the fibers of the pulp suspension at a refining degree of 17° SR have a water retention value of 1.5 g/g or less, preferably 1.4 g/g measured according to TAPPI UM 256.
  • the pulp suspension used can be comprised of softwood and/or hardware alone or in various proportions. If toilet paper is to be produced with the method according to the invention, the fiber content of the pulp suspension used can be comprised of preferably around 30% softwood and around 70% hardware for example.
  • the fiber content of the pulp suspension comprises preferably around 70% softwood and around 30% hardware for example. Good results for towel paper are also obtained when the fiber content of the pulp suspension used comprises around 70% software and around 30% chemi-thermomechanical pulp (CTMP).
  • CMP chemi-thermomechanical pulp
  • the method according to the invention is particularly effective with regard to increasing the dewaterability during production and the water absorption capacity and absorbency of the finished product at a satisfactory level of tear resistance when the tissue paper web is produced such that it includes regions which are more intensively compressed than others during production.
  • tissue paper web is to include regions compressed with various intensities, it makes sense for the tissue paper web to be formed already from the pulp suspension on a structured, in particular 3-dimensionally structured mesh.
  • the side facing the tissue paper web has at least in some areas depressed regions and, relative to the depressed areas, raised regions, whereby the tissue paper web is formed at least in areas in the depressed and raised regions of the structured mesh.
  • the areas of the tissue paper web formed in the depressed regions of the structured mesh have a higher volume and gsm substance in this case than the areas formed in the raised regions of the mesh.
  • tissue paper web is formed as the result.
  • the tissue paper web has voluminous pillow areas with a high gsm substance formed in the depressed regions of the structured mesh and less voluminous areas formed in the raised regions of the mesh.
  • the structure mesh can include a TAD mesh or a DSP mesh.
  • the advantage of a TAD mesh is its high permeability, thus guaranteeing quick dewatering during the forming operation.
  • the tissue paper web is conveyed preferably in a dewatering step between an upper structured, in particular 3-dimensionally structured, and permeable skin and a lower permeable skin, whereby pressure is exerted on the upper skin, the tissue paper web and the lower skin during the dewatering step along a dewatering section.
  • the pressure exerted here on the arrangement of an upper structured and permeable skin, tissue paper web and lower permeable skin can be generated by a gas flow.
  • the pressure exerted can be generated by a mechanical pressing force.
  • tissue paper web is compressed less intensively in the depressed regions than in the raised regions.
  • the upper structured and permeable skin is preferably a structured mesh, in particular a TAD mesh or DSP mesh
  • the lower permeable skin is preferably a felt having a sufficiently high water absorption capacity for the water which is pressed out of the tissue paper web.
  • structure of the lower skin reference is made to PCT/EP2005/050198, which is incorporated by reference herein.
  • the compressibility (change of thickness in mm upon application of force in N) of the upper skin is preferably smaller than the compressibility of the lower skin.
  • the voluminous structure of the tissue paper web upon the application of pressure is thus retained.
  • the voluminous pillow areas of the tissue paper web would not be compressed at all. Because of the compressible structure of the lower skin the voluminous pillow areas of the tissue paper are slightly pressed and hence gently dewatered.
  • the dynamic rigidity (K) as a measure for the compressibility of the lower skin—is 100000 N/mm or less, preferably 90000 N/mm, in particular preferably 70000 N/mm or less.
  • the G modulus as a measure for the elasticity of the lower skin—to be 2 N/mm 2 or more, preferably 4 N/mm 2 or more.
  • the water stored in the lower skin for example felt, can be expelled more easily with a gas flow when the permeability of the lower skin is not too high. It proves to be an advantage when the permeability of the lower skin is 80 cfm or less, preferably 40 cfm or less, in particular preferably 25 cfm or less. In the above mentioned ranges the rewetting of the tissue paper web by the lower skin is largely prevented.
  • the upper skin is first charged with gas, then the tissue paper web and finally the lower skin.
  • the dewatering of the paper web takes place in this case in the direction of the lower skin.
  • the dewatering of the paper web takes place in the direction of the lower skin.
  • the arrangement of upper skin, tissue paper web and lower skin is preferably charged with the gas flow at least in some areas in the region of the dewatering section so that the dewatering takes place simultaneously by the pressing force of the press belt and the through-flow of gas.
  • the gas flow through the tissue paper web amounts to approx. 150 m 3 per minute and meter length along the dewatering section.
  • the gas flow can be generated by a suction zone in a roller.
  • the suction zone has a length in the range between 200 mm and 2500 mm, preferably between 800 mm and 1800 mm, in particular preferably between 1200 mm and 1600 mm, and the vacuum in the suction zone amounts to between ⁇ 0.2 bar and ⁇ 0.8 bar, preferably between ⁇ 0.4 bar and ⁇ 0.6 bar.
  • the gas flow can also be generated by an excess pressure hood arranged above the top skin.
  • the temperature of the gas flow amounts to between 50° C. and 180° C., preferably between 120° C. and 150° C., and the excess pressure amounts to less than 0.2 bar, preferably less than 0.1 bar and in particular preferably less than 0.05 bar.
  • the gas can be hot air or steam.
  • the pressing force can be increased by a high tension of the press belt. Tests have shown that sufficient dewatering particularly of the non-voluminous areas of the tissue paper is obtained when the press belt is under a tension of at least 30 kN/m, preferably at least 60 kN/m or 80 kN/m.
  • the press belt can have a spiralized structure and be constructed as a so-called spiral link fabric for example. Furthermore it is possible for the press belt to have a woven structure.
  • the press belt To be able to obtain a good dewatering of the tissue paper web by the mechanical tensioning of the press belt and as the result of the gas flow through the press belt it makes sense for the press belt to have an open area of at least 25% and a contact area of at least 10% of its total area facing the upper skin. A uniform mechanical pressure is exerted on the arrangement of structured upper skin and lower skin by increasing the contact area of the press belt.
  • the press belt to have an open area of between 75% and 85% and a contact area of between 15% and 25% of its total area facing the upper skin. Also, provision is made for the press belt to have an open area of between 68% and 76% and a contact area of between 24% and 32% of its total area facing the upper skin.
  • the press belt In particular through the construction of the press belt with a woven structure it is possible for the press belt to have an open area of 50% or more and a contact area of 50% or more of its total area facing the upper skin. As such it is possible to provide for a good gas flow through the press belt as well as a homogeneous pressing force by means of the press belt.
  • the smooth surface is formed preferably by the circumferential surface of a roller.
  • tissue paper web to leave the dewatering section with a dry content of between 25% and 55%.
  • the structured mesh in the dewatering step makes sense for the structured mesh in the dewatering step to be the same mesh as in the formation of the tissue paper web.
  • the voluminous pillow areas of the tissue paper web remain in the depressed regions of the structured mesh during application of the pressure such that the voluminous areas are largely protected against the application of pressure and far less pressure is exerted on these areas than on the areas of the tissue paper web lying in between. The voluminous structure of the pillow areas is thus retained during the dewatering step.
  • the tissue paper web is preferably conveyed together with the structured skin of the dewatering step through a press nip in a further dewatering step and dewatered further.
  • tissue paper web in the press nip is preferably arranged between the structured and permeable upper skin and an in particular smooth and heated roller surface, in which case the heated and smooth surface is preferably formed by the circumferential surface of a Yankee drying cylinder.
  • Transferring the tissue paper web on the structured upper skin through the press nip ensures that the voluminous pillow areas of the tissue paper are less intensively pressed than the areas lying in between during this dewatering step as well.
  • the depressed and by comparison relatively raised areas of the structured and permeable skin are constructed and arranged in relation to each other such that only 35% or less, in particular only 25% or less of the tissue paper web is pressed in the press nip.
  • the structured upper skin is the same structured skin as that on which the tissue paper was formed, then the 3-dimensional structure of the tissue paper is created already during the formation.
  • the 3-dimensional structure of the tissue paper is not formed until during a subsequent dewatering step by the tissue paper web being pressed into a structured mesh, thus forming an essentially two-sided corrugated tissue paper.
  • the formation of the tissue paper between the structured skin and a forming mesh with a relatively smooth surface forms a tissue paper web which is essentially smooth on the side which was formed on the smooth forming mesh.
  • this side comes into contact with the circumferential surface of the Yankee drying cylinder, in which case the relatively large contact area compared to the prior art prevents the tissue paper web from burning at the high temperatures of the Yankee drying cylinder.
  • the temperature of the Yankee drying cylinder can be raised compared to the prior art, leading to a higher dry content of the tissue paper web produced.
  • the press nip In the interest of gentle pressing in the press nip it makes sense for the press nip to be an elongated press nip, meaning that it is formed by the roller surface and a shoe press unit.
  • the press nip can be formed by a suction press roller and the roller surface instead of by the shoe press unit and the roller surface.
  • tissue paper web To remove water, which is carried in the structured upper skin and which obstructs dewatering in the press nip, it makes sense for the tissue paper web to be conveyed together with the structured skin around an evacuated deflector roller, whereby the structured skin is arranged between the tissue paper web and the evacuated deflector roller.
  • the pulp suspension used has a suspension fraction which was produced from a low-consistency feed pulp suspension of high strength with a consistency of less than 10%.
  • this suspension fraction has a refining degree of 15° SR or more and was produced by at least one refining pass from the low-consistency feed pulp suspension of high strength at a refining degree of less than 15° SR.
  • a low-consistency feed pulp suspension of high strength is understood to be one from which it is possible to produce a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) whose breaking length measured according to TAPPI 220 and TAPPI 494 at a refining degree of 15° SR is greater than 3.0 km.
  • the pulp suspension used to have a suspension fraction which was produced from a high-consistency feed pulp suspension of low strength with a consistency of 20% or more, preferably 20% to 40%, in particular preferably 25% to 35%.
  • this suspension fraction has a refining degree of 15° SR or more and was produced by at least one refining pass from the high-consistency feed pulp suspension of low strength with a refining degree of less than 15° SR.
  • the high-consistency feed pulp suspension of high strength can be produced, for example, from a low-consistency feed pulp suspension of low strength through concentration of the same.
  • a low-consistency feed pulp suspension of low strength is understood to be one from which it is possible to produce a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) whose breaking length measured according to TAPPI 220 and TAPPI 494 at a refining degree of 15° SR is less than or equal to 3.0 km.
  • the pulp suspension it is possible not only for the pulp suspension to be provided from a suspension produced from a high-consistency feed pulp suspension but also for this suspension fraction (first suspension fraction) to be mixed with a suspension fraction (second suspension fraction) produced from a low-consistency feed pulp suspension with a consistency of less than 10% in order to produce the pulp suspension.
  • the second suspension fraction preferably has a higher refining degree than the first suspension fraction.
  • the high-consistency feed pulp suspension has a refining degree of 12° SR to 13° SR and the suspension fraction produced therefrom a refining degree of 15° SR to 19° SR, preferably 15° SR to 17° SR.
  • DSAs Dry Strength Agents
  • WSAs Wet Strength Agents
  • the high-consistency feed pulp suspension can be obtained through concentration of a low-consistency feed suspension, whereby the concentrating can be performed by means of a worm extruder for example.
  • the enzymes it has proven advantageous for the enzymes to be added to the low-consistency feed pulp suspension at a temperature in the range from 25° C. to 70° C., preferably 30° C. to 60° C., in particular preferably around 35° C. to 45° C., as their effectiveness is highest in this temperature range.
  • the enzymes to be added to the low-consistency feed pulp suspension with a pH-value in the range from 5 to 8, preferably 5.5 to 7.5, in particular preferably around 6.5 to 7.
  • the enzymes are allowed to work for a period of 1-2 hours, preferably 1.5 hours, on the low-consistency feed suspension.
  • the enzymes can be added in the pulper, for example.
  • the high-consistency feed pulp suspension to be refined at a temperature in the range between 20° C. and 80° C., preferably at 40° C.
  • FIG. 1 shows an apparatus for the production of a pulp suspension according to the invention
  • FIG. 2 shows a comparison between pulp suspensions according to the invention and others from the prior art
  • FIG. 3 shows a partial representation of an apparatus for performing the method according to the invention for the production of tissue paper
  • FIG. 4 shows the structure of a tissue paper web upon its formation with the method according to the invention
  • FIG. 5 shows the structure of a tissue paper web upon its formation with one of the known methods according to the prior art
  • FIG. 6 shows the structure of a tissue paper web upon its dewatering with the method according to the invention
  • FIG. 7 shows the structure of a tissue paper web upon its 3-dimensional structuring with one of the known methods according to the prior art
  • FIG. 8 shows the structure of a tissue paper web upon its dewatering in the press nip with the method according to the invention
  • FIG. 9 shows the structure of a tissue paper web upon its dewatering with one of the known methods according to the prior art
  • FIG. 10 shows a first apparatus for performing the method according to the invention
  • FIG. 11 shows a second apparatus for performing the method according to the invention.
  • FIG. 1 shows an apparatus 1 according to the invention for providing a pulp suspension which is subsequently used in the method according to the invention for the production of a tissue paper web.
  • Apparatus 1 includes a pulper 2 in which the dry raw stock, halfstuff and old paper is dissolved in water and converted into a pumpable state. The pulp thus formed is then conveyed to a mixing chest 3 . At this stage the pulp has a consistency of less than 10%, i.e. as a rule 5% or less, and in this connection is referred to as low-consistency feed pulp.
  • the pulp is subjected to a refining process at low consistency or a refining process at high consistency.
  • a low-consistency feed pulp of low strength for example, it is possible to produce from the pulp at a refining degree of 15° SR a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) with only a small breaking length of less than or equal to 3.0 km.
  • a feed pulp suspension is subjected to a refining process at high consistency.
  • the low-consistency feed pulp is conveyed to a concentrator 4 , which can be constructed as a worm extruder for example, and is concentrated therein from a consistency of 5% to a consistency of 25% to 35% for example, ideally around 30%, thus producing a high-consistency feed pulp suspension.
  • the high-consistency feed pulp suspension usually has a refining degree from 12° SR to 13° SR. Then the high-consistency feed pulp suspension is heated in a heating channel 5 to a temperature up to 80° C., ideally around 40° C., and finally conveyed to a refiner 6 for refining.
  • the high-consistency feed pulp suspension is refined to a refining degree of 15° SR or more.
  • the high-consistency feed pulp suspension thus produced usually has a refining degree in the range from 16° SR to 19° SR, preferably in the range from 16° SR to 18° SR.
  • the high-consistency feed pulp suspension is refined with a total refining energy in the range from 150 kWh to 300 kWh, in particular 180 kWh to 250 kWh per ton, whereby it is conceivable for the refining operation to be performed in one step or in several refining steps in succession.
  • Enzymes and agents for increasing the dry strength (DSAs) can be added to the pulp prior to the refining operation, for example in the pulper 2 .
  • DSAs dry strength
  • the low-consistency feed suspension has a pH-value in the range from 5 to 8, preferably 5.5 to 7.5, in particular preferably around 6.5 to 7, and the enzymes are allowed to work on the low-consistency feed suspension for 1-2 hours, preferably 1.5 hours.
  • the pulp suspension obtained from the high-consistency refining operation is then diluted in a dilution tank 7 with water which is obtained at least in part during concentration of the low-consistency feed pulp suspension in the concentrator 5 .
  • the re-diluted pulp thus obtained is then conveyed to a stock chest 8 .
  • the pulp suspension obtained from the high-consistency refining operation can be mixed in the stock chest 8 with a suspension which was obtained by a refining operation at low pulp consistency, meaning at less than 20%.
  • the stock chest 8 it is thus possible to form a pulp suspension which includes one suspension fraction produced with a high-consistency refining operation and another suspension fraction which was refined at a consistency of less than 20%.
  • the suspension fraction which was refined from a low-consistency feed pulp has a higher refining degree than the suspension fraction which was refined from a high-consistency feed pulp.
  • the pulp suspension it is also possible for the pulp suspension to include only the suspension produced with the high-consistency refining operation.
  • the low-consistency feed pulp already to have a high strength such that the pulp suspension comprises only one pulp suspension fraction produced with a refining operation at low consistency.
  • a low-consistency feed pulp of low strength is understood in this connection to be a pulp from which it is possible at a refining degree of 15° SR to produce a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) with a breaking length of 3.0 km or more.
  • the pulp suspension Downstream from stock chest 8 the pulp suspension is greatly diluted with mesh water 9 and conveyed to a headbox 10 .
  • the pulp suspension emerging from headbox 10 it is important for the production of tissue paper for the pulp suspension emerging from headbox 10 to have a refining degree of less than 21° SR and to be of such condition that it is possible to produce from said pulp suspension a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) whose breaking length measured according to TAPPI 220 and TAPPI 494 at at least a specific refining degree (RD specific ) is greater than or equal to the value resulting from 0.55(km/SR)*(RD specific ⁇ 10° SR), whereby the specific refining degree is selected from a refining range from 15° SR to less than 21° SR, preferably 15° SR to 19° SR, in particular preferably 17° SR to 19° SR.
  • FIG. 2 shows the dependency of the breaking length on the refining degree for various pulps.
  • two different softwood pulps designated “Softwood 1 ” and “Softwood 2 ”, are compared prior to and after the refining operation.
  • the coordinates for breaking length versus refining degree prior to refining are identified by the points A and the coordinates for breaking length versus refining degree after refining are identified by the points B.
  • both B SW1LC and B SW2HC are suitable at a refining degree of less than 21° SR for the method according to the invention for the production of tissue paper, as the property according to the invention exists for both pulp suspensions, namely that it is possible to produce from the suspensions a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) whose breaking length measured according to TAPPI 220 and TAPPI 494 at at least a specific refining degree (RD specific ) is greater than or equal to the value resulting from 0.55(km/SR)*(RD specific ⁇ 10° SR), whereby the specific refining degree is selected from a refining range from 15° SR to less than 21° SR.
  • the “Softwood 2 ” refined at high consistency and the “Softwood 1 ” refined at low consistency comply in particular with the property that it is possible to produce from said softwoods a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) whose breaking length measured according to TAPPI 220 and TAPPI 494 at at least a specific refining degree (RD specific ) is greater than or equal to 4.0 km, whereby the specific refining degree (RD specific ) is selected from a refining range less than or equal to 17° SR.
  • FIGS. 3 to 11 presenting two embodiments of different apparatuses for performing the method.
  • a pulp suspension 11 with the above mentioned properties emerges from headbox 10 such that the suspension is injected into the ingoing nip between a forming mesh 12 and a structured, in particular 3-dimensionally structured mesh 13 , as the result of which a tissue paper web 14 is formed.
  • Forming mesh 12 has a side facing tissue paper web 14 , which relative to that of structured mesh 13 is smooth.
  • side 15 of structured mesh 13 facing tissue paper web 14 has depressed regions 16 and, relative to depressed areas 16 , raised regions 17 such that tissue paper web 14 is formed in depressed regions 16 and raised regions 17 of structured mesh 13 .
  • the difference in height between depressed regions 16 and raised regions 17 amounts to preferably 0.07 mm and 0.6 mm.
  • the area formed by raised regions 16 amounts to preferably 10% or more, in particular preferably 20% or more and in particular preferably 25% to 30%.
  • structured mesh 13 is shown as a TAD mesh 13 .
  • tissue paper web 14 and forming mesh 12 is directed around a forming roller 18 and tissue paper web 14 is dewatered essentially by forming mesh 12 before forming mesh 12 is taken off tissue paper web 14 and tissue paper web 14 is transported further on TAD mesh 13 .
  • tissue paper web 14 formed between flat forming mesh 12 and TAD mesh 13 .
  • the voluminous pillow areas C′ of tissue paper web 14 formed in depressed regions 16 of TAD mesh 13 have a higher volume and a higher gsm substance than areas A′ of tissue paper web 14 formed in raised regions 17 of TAD mesh 13 . Accordingly, tissue paper web 14 already has a 3-dimensional structure as the result of its forming on structured mesh 13 .
  • tissue paper web 114 which was formed between two flat forming meshes 112 and 112 ′. As the result of its forming between two smooth forming meshes 112 and 112 ′, tissue paper web 114 has an essentially smooth and non-3-dimensional structure.
  • tissue paper web 14 is conveyed between structured mesh 13 , which is arranged above, and a lower permeable skin 19 , which is constructed as felt 19 , whereby during the dewatering step along a dewatering section pressure is exerted on structured mesh 13 , tissue paper web 14 and felt 19 such that tissue paper web 14 is dewatered in the direction of felt 19 , as indicated by arrows 20 in the FIG. 6 .
  • the voluminous areas C′ are less intensively compressed than the areas A′, thus resulting in the voluminous structure of the areas C′ being preserved.
  • tissue paper web 114 is pressed into a structured mesh 113 .
  • tissue paper web 114 in the areas C which are pressed into depressed regions 116 of structured mesh 113 , are stretched, as the result of which the gsm substance in areas C is reduced.
  • tissue paper web 114 in the areas C is intensively pressed, as the result of which the volume of areas C is reduced as well.
  • the pressure for dewatering tissue paper web 14 is generated during the dewatering step at least in some areas simultaneously by a gas flow and a mechanical pressing force.
  • the gas flow passes first through the structured mesh, then tissue paper web 14 and finally the lower skin constructed as felt 19 .
  • the gas flow through tissue paper web 14 amounts to around 150 m 3 per minute and meter web length.
  • the gas flow is generated by a suction zone 25 in roller 24 , suction zone 25 having a length in the region of between 200 mm and 2500 mm, preferably between 800 mm and 1800 mm, in particular preferably between 1200 mm and 1600 mm.
  • the vacuum in the suction zone 25 amounts to between ⁇ 0.2 bar and ⁇ 0.8 bar, preferably between ⁇ 0.4 bar and 0.6 bar.
  • the mechanical pressing force is generated during the dewatering step by conveying the arrangement of structured mesh 13 , tissue paper web 14 and felt 19 to a dewatering section 21 between a tensioned press belt 22 and a smooth surface 23 , in which case press belt 22 acts on structured mesh 13 and felt 19 rests on smooth surface 23 .
  • Smooth surface 23 is thus formed by the circumferential surface 23 of a roller 24 .
  • the dewatering section 21 is defined essentially by the wrap zone of press belt 22 around the circumferential surface 23 of roller 24 , whereby the wrap zone is defined by the distance between two deflector rollers 25 and 26 .
  • Press belt 22 is under a tension of at least 30 kN/m, preferably at least 60 kN/m or 80 kN/m, and has an open area of at least 25% and a contact area of at least 10% of its total area facing the upper skin.
  • the press belt is constructed as a spiral link fabric and has an open area of between 51% and 62% and a contact area of between 38% and 49% of its total area facing the upper skin.
  • PCT/EP2005/050198 is incorporated herein by reference.
  • tissue paper web 14 leaves the dewatering section 21 with a dry content of between 25% and 55%.
  • tissue paper web 14 together with structured mesh 13 is conveyed in a further dewatering step through a press nip 27 , whereby tissue paper web 14 in press nip 27 is arranged between structured mesh 13 and a smooth roller surface 28 of a Yankee drying cylinder.
  • press nip 27 is a press nip formed by the Yankee drying cylinder 29 and a shoe press 30 .
  • tissue paper web 14 lies with a relatively large area on the circumferential surface 28 of Yankee drying cylinder 29 , while on the other side tissue paper web 14 lies on structured mesh 13 .
  • the depressed and by comparison relatively raised regions 17 of structured mesh 13 are constructed and arranged in relation to each other such that pillow areas C′ are essentially not pressed in press nip 27 , the areas being 35% or less, in particular 25% or less of tissue paper web 14 .
  • the areas A′ are pressed, as the result of which the strength of tissue paper web 14 is increased ( FIG. 8 ).
  • the tissue paper web 114 known from the prior art comes to rest on the circumferential face 128 of the Yankee drying cylinder with a relatively small area compared to the tissue paper web 14 .
  • the disadvantage of this is that the tissue paper 114 might burn on the circumferential face, which is why the temperature of the Yankee cylinder has to be kept low in the methods known from the prior art. Consequently, a lower dry content is obtainable with the method known from the prior art ( FIG. 9 ).
  • tissue paper web 14 to be conveyed together with structured mesh 13 around an evacuated roller before the web runs through press nip 27 , in which case structured mesh 13 is arranged between tissue paper web 14 and the evacuated deflector roller (not illustrated).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Sanitary Thin Papers (AREA)
US11/497,061 2005-01-08 2006-08-01 Method for the production of tissue paper Abandoned US20060266487A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/429,692 US20090205794A1 (en) 2005-01-08 2009-04-24 Method for the production of tissue paper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005036075.0 2005-01-08
DE102005036075A DE102005036075A1 (de) 2005-08-01 2005-08-01 Verfahren zur Herstellung von Tissuepapier

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/429,692 Division US20090205794A1 (en) 2005-01-08 2009-04-24 Method for the production of tissue paper

Publications (1)

Publication Number Publication Date
US20060266487A1 true US20060266487A1 (en) 2006-11-30

Family

ID=37322973

Family Applications (2)

Application Number Title Priority Date Filing Date
US11/497,061 Abandoned US20060266487A1 (en) 2005-01-08 2006-08-01 Method for the production of tissue paper
US12/429,692 Abandoned US20090205794A1 (en) 2005-01-08 2009-04-24 Method for the production of tissue paper

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/429,692 Abandoned US20090205794A1 (en) 2005-01-08 2009-04-24 Method for the production of tissue paper

Country Status (3)

Country Link
US (2) US20060266487A1 (de)
EP (1) EP1749935A3 (de)
DE (1) DE102005036075A1 (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070119558A1 (en) * 2005-10-13 2007-05-31 Thomas Scherb Method for the production of tissue paper
WO2007140838A2 (de) * 2006-06-08 2007-12-13 Voith Patent Gmbh Lignocellulosischer faserstoff aus holz
WO2007140839A3 (de) * 2006-06-08 2008-03-27 Voith Patent Gmbh Verfahren zum herstellen von faserstoff aus holz
WO2007140837A3 (de) * 2006-06-08 2008-04-03 Voith Patent Gmbh Verfahren zum herstellen von faserstoff
US20080149292A1 (en) * 2006-12-22 2008-06-26 Thomas Scherb Machine for producing a fibrous web
WO2008077450A1 (de) * 2006-12-23 2008-07-03 Voith Patent Gmbh Verfahren zur herstellung von tissuepapier
WO2008138429A1 (de) * 2007-05-11 2008-11-20 Voith Patent Gmbh Lignocellulosischer faserstoff aus holz
WO2008138428A1 (de) * 2007-05-11 2008-11-20 Voith Patent Gmbh Verfahren zum zerfasern von chemisch behandeltem, lignocellulosischem rohstoff
WO2009015704A1 (de) * 2007-07-31 2009-02-05 Voith Patent Gmbh Gebleichter faserstoff
WO2009015699A1 (de) * 2007-07-31 2009-02-05 Voith Patent Gmbh Lignocellulosischer faserstoff aus einjahrespflanzen
US20090205794A1 (en) * 2005-01-08 2009-08-20 Voith Paper Patent Gmbh Method for the production of tissue paper
CN104711900A (zh) * 2013-12-17 2015-06-17 上海东冠纸业有限公司 一种卫生巾用吸水衬纸的制作方法
CN106223102A (zh) * 2016-08-29 2016-12-14 漯河银鸽生活纸产有限公司 一种尿裤芯体包覆专用纸及其生产工艺
US10463205B2 (en) * 2016-07-01 2019-11-05 Mercer International Inc. Process for making tissue or towel products comprising nanofilaments
US10570261B2 (en) * 2016-07-01 2020-02-25 Mercer International Inc. Process for making tissue or towel products comprising nanofilaments
US10731295B2 (en) 2017-06-29 2020-08-04 Mercer International Inc Process for making absorbent towel and soft sanitary tissue paper webs
US11248346B2 (en) * 2016-05-23 2022-02-15 Gpcp Ip Holdings Llc Dissolved air de-bonding of a tissue sheet
US11255051B2 (en) 2017-11-29 2022-02-22 Kimberly-Clark Worldwide, Inc. Fibrous sheet with improved properties
US11313061B2 (en) 2018-07-25 2022-04-26 Kimberly-Clark Worldwide, Inc. Process for making three-dimensional foam-laid nonwovens
US11591755B2 (en) 2015-11-03 2023-02-28 Kimberly-Clark Worldwide, Inc. Paper tissue with high bulk and low lint

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007017061A1 (de) * 2007-04-11 2008-10-16 Voith Patent Gmbh Verfahren zur Herstellung von Tissuepapier
EP3231939A1 (de) 2016-04-11 2017-10-18 Fuhrmann, Uwe Mehrlagiges papiertaschentuch zur reduzierung der übertragung von krankheitserregern

Citations (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301745A (en) * 1963-04-26 1967-01-31 Scott Paper Co Pulp processing method for mixed cellulosic materials
US4718980A (en) * 1985-12-30 1988-01-12 Weyerhaeuser Company Interstage treatment of mechanical pulp
US5227024A (en) * 1987-12-14 1993-07-13 Daniel Gomez Low density material containing a vegetable filler
US5409572A (en) * 1991-01-15 1995-04-25 James River Corporation Of Virginia High softness embossed tissue
US5638284A (en) * 1994-05-18 1997-06-10 Eka Nobel Ab Method of quantifying the wet strength of paper
US5725732A (en) * 1994-11-18 1998-03-10 P. H. Glatfelter Company Process for treating hardwood pulp with an enzyme mixture to reduce vessel element picking
US5755926A (en) * 1992-02-24 1998-05-26 Kimberly-Clark Worldwide, Inc. Integrated pulping process of waste paper yielding tissue-grade paper fibers
US5770012A (en) * 1994-11-18 1998-06-23 P. H. Glatfelter Co. Process for treating paper machine stock containing bleached hardwood pulp with an enzyme mixture to reduce vessel element picking
US6027610A (en) * 1994-06-29 2000-02-22 Kimberly-Clark Corporation Production of soft paper products from old newspaper
US6296736B1 (en) * 1997-10-30 2001-10-02 Kimberly-Clark Worldwide, Inc. Process for modifying pulp from recycled newspapers
US20020060046A1 (en) * 2000-07-03 2002-05-23 Voith Paper Patent Gmbh Machine and process for producing a fibrous material web
US20030136018A1 (en) * 2002-01-24 2003-07-24 Jeffrey Herman Method and an apparatus for manufacturing a fiber web provided with a three-dimensional surface structure
US6899790B2 (en) * 2000-03-06 2005-05-31 Georgia-Pacific Corporation Method of providing papermaking fibers with durable curl
US20060118993A1 (en) * 2004-12-03 2006-06-08 Fort James Corporation Embossing system and product made thereby with both perforate bosses in the cross machine direction and a macro pattern
US20070029061A1 (en) * 2005-08-05 2007-02-08 Thomas Scherb Machine for the production of tissue paper
US20070074835A1 (en) * 2005-09-30 2007-04-05 Thomas Scherb Process and apparatus for producing a tissue web
US20070119558A1 (en) * 2005-10-13 2007-05-31 Thomas Scherb Method for the production of tissue paper
US20070240842A1 (en) * 2006-04-14 2007-10-18 Voith Patent Gmbh Twin wire for an atmos system
US20080257513A1 (en) * 2005-12-16 2008-10-23 Thomas Scherb Apparatus and method for treating a fibrous web, in particular for producing a tissue paper web
US20080257514A1 (en) * 2005-12-16 2008-10-23 Thomas Scherb Apparatus and method for treating a fibrous web, in particular for producing a tissue paper web
US20090020248A1 (en) * 2006-03-21 2009-01-22 Georgia-Pacific Consumer Products Lp Absorbent sheet incorporating regenerated cellulose microfiber
US20090065164A1 (en) * 2006-04-21 2009-03-12 Shisei Goto Cellulose-based fibrous materials
US7527709B2 (en) * 2006-03-14 2009-05-05 Voith Paper Patent Gmbh High tension permeable belt for an ATMOS system and press section of paper machine using the permeable belt
US20090205794A1 (en) * 2005-01-08 2009-08-20 Voith Paper Patent Gmbh Method for the production of tissue paper
US20100065235A1 (en) * 2008-09-16 2010-03-18 Dixie Consumer Products Llc Food wrap base sheet with regenerated cellulose microfiber

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963395A (en) * 1958-03-31 1960-12-06 Crown Zellerbach Corp Process of bleaching lignocellulosic pulps
US3382140A (en) * 1966-12-30 1968-05-07 Crown Zellerbach Corp Process for fibrillating cellulosic fibers and products thereof
US4036679A (en) * 1975-12-29 1977-07-19 Crown Zellerbach Corporation Process for producing convoluted, fiberized, cellulose fibers and sheet products therefrom
SE441282B (sv) * 1984-02-22 1985-09-23 Mo Och Domsjoe Ab Forfarande for framstellning av forbettrad hogutbytesmassa
DE68922024T2 (de) * 1988-06-14 1995-09-28 Procter & Gamble
US5055159A (en) * 1990-05-16 1991-10-08 Wisconsin Alumni Research Foundation Biomechanical pulping with C. subvermispora
US5262007A (en) * 1992-04-09 1993-11-16 Procter & Gamble Company Soft absorbent tissue paper containing a biodegradable quaternized amine-ester softening compound and a temporary wet strength resin
SE9402101L (sv) * 1994-06-15 1995-12-16 Moelnlycke Ab Lättavvattnad, bulkig, kemimekanisk massa med låg spet- och finmaterialhalt
US5679218A (en) 1994-07-29 1997-10-21 The Procter & Gamble Company Tissue paper containing chemically softened coarse cellulose fibers
JP2873296B2 (ja) * 1995-06-12 1999-03-24 アンドリッツ・スプラウト−バウアー・インコーポレイテッド 高温且つ高速の短時間処理式チップ精製方法
US6402887B1 (en) * 1997-12-01 2002-06-11 Biopulping International, Inc. Biopulping industrial wood waste
DE19843729A1 (de) * 1998-09-24 2000-03-30 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zur Verbesserung des Schrumpfungs-Querprofils
US6387210B1 (en) * 1998-09-30 2002-05-14 Kimberly-Clark Worldwide, Inc. Method of making sanitary paper product from coarse fibers
SE515722C2 (sv) 2000-01-10 2001-10-01 Valmet Karlstad Ab Värmebehandling av mald, kemiskt framställd massasuspension
US20050000666A1 (en) * 2003-05-06 2005-01-06 Novozymes A/S Use of hemicellulase composition in mechanical pulp production
BRPI0506499B1 (pt) * 2004-01-30 2019-12-31 Voith Paper Patent Gmbh sistema avançado de desaguamento
US7387706B2 (en) * 2004-01-30 2008-06-17 Voith Paper Patent Gmbh Process of material web formation on a structured fabric in a paper machine
AU2005238104A1 (en) * 2004-05-03 2005-11-10 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses Method for mechanical pulp production
JP4734347B2 (ja) * 2005-02-11 2011-07-27 エフピーイノベイションズ 高粘稠度円錐状ディスク・リファイナ内の木材チップ又はパルプをリファイニングする方法
RU2407768C2 (ru) * 2005-06-03 2010-12-27 Андриц Аг Способ снижения потребления электроэнергии при производстве термомеханической древесной массы посредством высокотемпературного размола древесной массы низкой и средней концентрации

Patent Citations (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301745A (en) * 1963-04-26 1967-01-31 Scott Paper Co Pulp processing method for mixed cellulosic materials
US4718980A (en) * 1985-12-30 1988-01-12 Weyerhaeuser Company Interstage treatment of mechanical pulp
US5227024A (en) * 1987-12-14 1993-07-13 Daniel Gomez Low density material containing a vegetable filler
US5409572A (en) * 1991-01-15 1995-04-25 James River Corporation Of Virginia High softness embossed tissue
US5755926A (en) * 1992-02-24 1998-05-26 Kimberly-Clark Worldwide, Inc. Integrated pulping process of waste paper yielding tissue-grade paper fibers
US5638284A (en) * 1994-05-18 1997-06-10 Eka Nobel Ab Method of quantifying the wet strength of paper
US6027610A (en) * 1994-06-29 2000-02-22 Kimberly-Clark Corporation Production of soft paper products from old newspaper
US5725732A (en) * 1994-11-18 1998-03-10 P. H. Glatfelter Company Process for treating hardwood pulp with an enzyme mixture to reduce vessel element picking
US5770012A (en) * 1994-11-18 1998-06-23 P. H. Glatfelter Co. Process for treating paper machine stock containing bleached hardwood pulp with an enzyme mixture to reduce vessel element picking
US6296736B1 (en) * 1997-10-30 2001-10-02 Kimberly-Clark Worldwide, Inc. Process for modifying pulp from recycled newspapers
US6899790B2 (en) * 2000-03-06 2005-05-31 Georgia-Pacific Corporation Method of providing papermaking fibers with durable curl
US20050145348A1 (en) * 2000-03-06 2005-07-07 Lee Jeffrey A. Method of providing paper-making fibers with durable curl and absorbent products incorporating same
US20020060046A1 (en) * 2000-07-03 2002-05-23 Voith Paper Patent Gmbh Machine and process for producing a fibrous material web
US7428786B2 (en) * 2002-01-24 2008-09-30 Voith Paper Patent Gmbh Method and an apparatus for manufacturing a fiber web provided with a three-dimensional surface structure
US20030136018A1 (en) * 2002-01-24 2003-07-24 Jeffrey Herman Method and an apparatus for manufacturing a fiber web provided with a three-dimensional surface structure
US20060118993A1 (en) * 2004-12-03 2006-06-08 Fort James Corporation Embossing system and product made thereby with both perforate bosses in the cross machine direction and a macro pattern
US20090205794A1 (en) * 2005-01-08 2009-08-20 Voith Paper Patent Gmbh Method for the production of tissue paper
US20070029061A1 (en) * 2005-08-05 2007-02-08 Thomas Scherb Machine for the production of tissue paper
US20070074835A1 (en) * 2005-09-30 2007-04-05 Thomas Scherb Process and apparatus for producing a tissue web
US20090242158A1 (en) * 2005-09-30 2009-10-01 Voith Patent Gmbh Process and apparatus for producing a tissue web
US20070119558A1 (en) * 2005-10-13 2007-05-31 Thomas Scherb Method for the production of tissue paper
US20080257513A1 (en) * 2005-12-16 2008-10-23 Thomas Scherb Apparatus and method for treating a fibrous web, in particular for producing a tissue paper web
US20080257514A1 (en) * 2005-12-16 2008-10-23 Thomas Scherb Apparatus and method for treating a fibrous web, in particular for producing a tissue paper web
US7527709B2 (en) * 2006-03-14 2009-05-05 Voith Paper Patent Gmbh High tension permeable belt for an ATMOS system and press section of paper machine using the permeable belt
US20090020248A1 (en) * 2006-03-21 2009-01-22 Georgia-Pacific Consumer Products Lp Absorbent sheet incorporating regenerated cellulose microfiber
US20070240842A1 (en) * 2006-04-14 2007-10-18 Voith Patent Gmbh Twin wire for an atmos system
US20090065164A1 (en) * 2006-04-21 2009-03-12 Shisei Goto Cellulose-based fibrous materials
US20100065235A1 (en) * 2008-09-16 2010-03-18 Dixie Consumer Products Llc Food wrap base sheet with regenerated cellulose microfiber

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090205794A1 (en) * 2005-01-08 2009-08-20 Voith Paper Patent Gmbh Method for the production of tissue paper
US20070119558A1 (en) * 2005-10-13 2007-05-31 Thomas Scherb Method for the production of tissue paper
US7972476B2 (en) * 2005-10-13 2011-07-05 Voith Patent Gmbh Method for the production of tissue paper
US8152960B2 (en) 2006-06-08 2012-04-10 Voith Patent Gmbh Lignocellulosic fibrous material made of wood
WO2007140837A3 (de) * 2006-06-08 2008-04-03 Voith Patent Gmbh Verfahren zum herstellen von faserstoff
WO2007140838A3 (de) * 2006-06-08 2008-03-27 Voith Patent Gmbh Lignocellulosischer faserstoff aus holz
US8758557B2 (en) 2006-06-08 2014-06-24 Voith Patent Gmbh Process for producing fibrous material from wood
WO2007140839A3 (de) * 2006-06-08 2008-03-27 Voith Patent Gmbh Verfahren zum herstellen von faserstoff aus holz
WO2007140838A2 (de) * 2006-06-08 2007-12-13 Voith Patent Gmbh Lignocellulosischer faserstoff aus holz
US20090314443A1 (en) * 2006-06-08 2009-12-24 Esa-Matti Aalto Method for producing fibrous material
US20100032111A1 (en) * 2006-06-08 2010-02-11 Voith Patent Gmbh Process for producing fibrous material from wood
US20080149292A1 (en) * 2006-12-22 2008-06-26 Thomas Scherb Machine for producing a fibrous web
US7976683B2 (en) * 2006-12-22 2011-07-12 Voith Patent Gmbh Machine for producing a fibrous web
WO2008077450A1 (de) * 2006-12-23 2008-07-03 Voith Patent Gmbh Verfahren zur herstellung von tissuepapier
US20090266500A1 (en) * 2006-12-23 2009-10-29 Hans-Ludwig Schubert Process for producing tissue paper
WO2008138429A1 (de) * 2007-05-11 2008-11-20 Voith Patent Gmbh Lignocellulosischer faserstoff aus holz
WO2008138428A1 (de) * 2007-05-11 2008-11-20 Voith Patent Gmbh Verfahren zum zerfasern von chemisch behandeltem, lignocellulosischem rohstoff
WO2009015699A1 (de) * 2007-07-31 2009-02-05 Voith Patent Gmbh Lignocellulosischer faserstoff aus einjahrespflanzen
WO2009015704A1 (de) * 2007-07-31 2009-02-05 Voith Patent Gmbh Gebleichter faserstoff
CN104711900A (zh) * 2013-12-17 2015-06-17 上海东冠纸业有限公司 一种卫生巾用吸水衬纸的制作方法
US11591755B2 (en) 2015-11-03 2023-02-28 Kimberly-Clark Worldwide, Inc. Paper tissue with high bulk and low lint
US11248346B2 (en) * 2016-05-23 2022-02-15 Gpcp Ip Holdings Llc Dissolved air de-bonding of a tissue sheet
US11248345B2 (en) 2016-05-23 2022-02-15 Gpcp Ip Holdings Llc Dissolved air de-bonding of a tissue sheet
US10570261B2 (en) * 2016-07-01 2020-02-25 Mercer International Inc. Process for making tissue or towel products comprising nanofilaments
US11111344B2 (en) 2016-07-01 2021-09-07 Mercer International Inc. Process for making absorbent towel and soft sanitary tissue paper webs having nanofilaments
US10463205B2 (en) * 2016-07-01 2019-11-05 Mercer International Inc. Process for making tissue or towel products comprising nanofilaments
CN106223102A (zh) * 2016-08-29 2016-12-14 漯河银鸽生活纸产有限公司 一种尿裤芯体包覆专用纸及其生产工艺
US10731295B2 (en) 2017-06-29 2020-08-04 Mercer International Inc Process for making absorbent towel and soft sanitary tissue paper webs
US11255051B2 (en) 2017-11-29 2022-02-22 Kimberly-Clark Worldwide, Inc. Fibrous sheet with improved properties
US11313061B2 (en) 2018-07-25 2022-04-26 Kimberly-Clark Worldwide, Inc. Process for making three-dimensional foam-laid nonwovens
US11788221B2 (en) 2018-07-25 2023-10-17 Kimberly-Clark Worldwide, Inc. Process for making three-dimensional foam-laid nonwovens

Also Published As

Publication number Publication date
US20090205794A1 (en) 2009-08-20
DE102005036075A1 (de) 2007-02-15
EP1749935A2 (de) 2007-02-07
EP1749935A3 (de) 2009-05-13

Similar Documents

Publication Publication Date Title
US20060266487A1 (en) Method for the production of tissue paper
US7972476B2 (en) Method for the production of tissue paper
US8303773B2 (en) Machine for the production of tissue paper
US6210528B1 (en) Process of making web-creped imprinted paper
US7850820B2 (en) Method for the production of tissue paper
US7905989B2 (en) Process and apparatus for producing a tissue web
US8382956B2 (en) Device and method for producing a material web
US9347182B2 (en) Methods and apparatus for forming fluff pulp sheets
EP2758597B1 (de) Weichgewebeprodukt mit baumwolle
US7850825B2 (en) Tissue machine
KR20160018586A (ko) 연성 및 강도가 강화된 티슈
US11795619B2 (en) Tailored hemicellulose in non-wood fibers for tissue products
KR20160019470A (ko) 거대조류를 포함하는 층상 티슈 구조체
JP2002501992A (ja) 装飾模様を有する紙構造体及びその製造方法
KR100738779B1 (ko) 얇고 부드러운 목욕 티슈
JP2023540032A (ja) ミクロフィブリル化セルロースを含むロール紙の製造方法及びロール紙
WO2001057313A1 (en) Fluff pulp, method to produce fluff pulp, use of fluff pulp and a product produced of fluff pulp
WO2020229737A1 (en) Fiber formulation, its use and method for making it
CZ20002196A3 (cs) Způsob výroby papíru majícího trojrozměrné vzorování

Legal Events

Date Code Title Description
AS Assignment

Owner name: VOITH PAPER PATENT GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHERB, THOMAS;SILVA, LUIZ CARLOS;BERARDI, ROGERIOR;AND OTHERS;REEL/FRAME:018270/0703;SIGNING DATES FROM 20060518 TO 20060606

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION