CN101400854B - Papermaking method and papermaking machine - Google Patents

Papermaking method and papermaking machine Download PDF

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Publication number
CN101400854B
CN101400854B CN2007800088947A CN200780008894A CN101400854B CN 101400854 B CN101400854 B CN 101400854B CN 2007800088947 A CN2007800088947 A CN 2007800088947A CN 200780008894 A CN200780008894 A CN 200780008894A CN 101400854 B CN101400854 B CN 101400854B
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China
Prior art keywords
paper
stick
copying
screen cloth
material liquid
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CN101400854A (en
Inventor
寺本真树
古林慎二
井户亨
和田谦二
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Sumitomo Seika Chemicals Co Ltd
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Seitetsu Kagaku Co Ltd
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20Macromolecular organic compounds
    • D21H17/33Synthetic macromolecular compounds
    • D21H17/46Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/53Polyethers; Polyesters
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H21/00Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06Paper forming aids
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H23/00Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04Addition to the pulp; After-treatment of added substances in the pulp
    • D21H23/06Controlling the addition
    • D21H23/14Controlling the addition by selecting point of addition or time of contact between components
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H27/00Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002Tissue paper; Absorbent paper

Abstract

A papermaking method conducted using a papermaking machine which includes a pump (1), a screen (2) located downstream from the pump (1), and a head box (3) disposed downstream from the screen (2). Downstream from the pump (1), an aqueous papermaking thickener solution having a concentration of 0.1-3.0 wt.% is added to a feed pulp slurry from which impurities are to be removed with the screen (2).

Description

Copy paper method and paper machine
Technical field
What the present invention relates to reduce the needed water use amount of stick copies paper method and paper machine.
Background technology
The manufacturing of paper is generally carried out through following operation, form wood chip from log after, through the paper pulp operation that steaming is separated, cleaned, generation material liquid somaplasm (pulp slurry) is handled in selected, bleaching etc.; With this material liquid somaplasm supplied to metal wire from head box dewater, utilize squeezing, drying etc. to handle machine hand's preface of generation paper then.
There are cylinder paper machine, fourdrinier paper machine, weak point to net all kinds such as paper machine as the employed paper machine of the manufacturing of paper is known.When using these paper machines to produce the low paper of weight per unit areas such as thin papers, toilet paper, the paper of copying that generally is used to invest the paper pulp dispersiveness is used stick.When copying paper, for example under the situation of using PEO (poly ethylene oxide), even because under low concentration with the use of stick; Viscosity is also high; Have the linearity of dragging, so be difficult to mix with the material liquid somaplasm, to become concentration be the aqueous solution below the 0.01 weight % degree in dissolving in water; Be adjusted into and have suitable viscosity, add in the material liquid somaplasm.In addition, copy paper through use and use stick, in machine hand's preface, can bring into play the paper pulp dispersion effect, in the paper that obtains as finished product, paper pulp fiber disperses equably, and quality is excellent.But, because under the situation of PEO class stick, when the aqueous solution is applied the shearing of intensity; Solution viscosity reduces; Reduce with the dispersion effect that stick causes by copying paper,, stick is added between screen cloth and the head box therefore in order not apply big shearing force.
On the other hand, recent years, the quality of PEO class stick improves.That is, realize the macromolecule quantification of PEO class stick.The PEO class is copied paper and is existed with ... this molecular weight with the paper pulp dispersion effect of stick, and molecular weight is high more, and dispersion effect is high more, but solution viscosity also becomes very high, therefore is difficult to mix with the material liquid somaplasm.In fact, when in industry, using, all the time, be used in a large number the water that dissolves and dilute, carry out viscosity adjustment.Many system merchants of paper plant use the PEO class to copy paper and use stick, but existence needs the shortcoming of a large amount of water.According to circumstances different, also exist in about 1/3 the situation of paper of copying with all waters of use in the stick.In recent years, from reducing the viewpoint of carrying capacity of environment, what hope can suppress the water use amount as far as possible copies paper with stick or its method for using.In addition, present situation is for still using the technology before 40 years in method for using.
In the following patent documentation 1, disclose and replace the paper of copying of PEO use stick, papermaking properties such as the quality that it has improved the dispersiveness of paper fiber and the paper that obtains and feel, but consideration minimizing water use amount.
Patent documentation 1: TOHKEMY 2000-290892 communique
Summary of the invention
The present invention accomplishes in view of the aforementioned technical background; Its purpose be to provide through make be added in the material liquid somaplasm copy paper with the concentration of the stick aqueous solution with add local optimum; Even under the situation of the PEO class stick that uses macromolecule to quantize; Can not reduce the stick effect yet, have good quality, and can copy paper method and paper machine than what reduced the water use amount in the past better.
Present inventors have carried out research with great concentration in order to address the above problem, when various evaluation is carried out in the variation that the result causes in the shearing to the PEO aqueous solution, confirm more than the concentration of regulation, to be sheared hardly the adverse effect that viscosity is reduced.Through in copying paper, using this result, find when the PEO class stick that uses macromolecule to quantize, can reduce the water use amount, until accomplishing the present invention.
That is, according to a first aspect of the invention, a kind of paper method of copying is provided, it uses paper machine, and above-mentioned paper machine comprises: the slip supply arrangement of base feed slush pulp; From the material liquid somaplasm of supplying with by this supply arrangement, remove the screen cloth of field trash; With the head box that is located at these screen cloth downstream; The above-mentioned paper method of copying is characterised in that: in the downstream of above-mentioned slip supply arrangement, utilize above-mentioned screen cloth to remove to add in the material liquid somaplasm before the field trash concentration be 0.1~3.0 weight % copy the aqueous solution of paper with stick.
According to the above paper method of copying; Even under the situation of the PEO class stick that uses macromolecule to quantize, also can be than improving solution concentration in the past better, and use stick stoste owing to do not need former dilution to copy paper; So can reduce the water use amount widely (in the past; Owing to need be diluted to 0.01 weight %, so in order to dilute stick, need Duo 10 times water) than the present invention.Therefore, in copying the paper method, can use PEO class stick, can reduce the stick cost, improve the quality of finished paper than higher in the past molecular weight.In addition because the dispersion of stick utilizes the high shear of screen cloth in paper machine, so with former comparison, stick evenly dispersed, the paper pulp fiber of the paper that obtains as finished product disperses equably, quality is excellent.Like this, utilize and originally to copy the paper method, not only can bring into play easily and copy paper with the performance of stick with alleviate the load of the wastewater treatment of copying the paper water, regeneration etc., and can improve the quality of paper.
In addition, copy in the paper method, owing to utilize the high shear of screen cloth and field trash (foreign matter) to remove ability of the present invention; Can solve simultaneously by copying the pimple that paper causes with stick, problem such as the viscosity of solution is inhomogeneous is so can significantly reduce fault such as disconnected paper; And can make that to copy paper in stable condition; Therefore, use the paper method of copying of the present invention can improve the yield rate of manufacturing paper with pulp, improve production efficiency.
On the other hand, because can copy paper with the solution concentration of stick and need not copy the diluent facilities that paper uses in stick stoste,, can effectively utilize the soil so can dwindle and copy paper with the relevant equipment of stick than improving better in the past in dilution.
In addition; Though the dispersion effect of PEO class stick is high; But in high speed paper machines such as the meniscus former paper machine that high shear takes place, two net formula paper machines, because the PEO class stick aqueous solution causes viscosity to reduce owing to shearing in existing adding method, therefore; Advantage is little, and its use is kept someone at a respectful distance.Yet, copy the paper method according to of the present invention, even apply high shear, also can not damage the dispersion suburb fruit of stick, can use extremely simple equipment to add stick, improve the quality of finished paper, improve productivity ratio.
The preferred above-mentioned paper of copying uses stick to be PEO class stick, and the above-mentioned 0.5 weight % solution viscosity of copying paper use stick is 400~1100mPas.
According to preferred implementation of the present invention, the above-mentioned paper of copying is added in the material liquid somaplasm that in the pipe arrangement that connects above-mentioned slip supply arrangement and above-mentioned screen cloth, flows with the aqueous solution of stick.
According to another preferred embodiment of the present invention, in above-mentioned screen cloth, the above-mentioned paper of copying is added on through in the material liquid somaplasm before the screen drum with the aqueous solution of stick.
On the other hand, according to a second aspect of the invention, a kind of paper machine is provided, it is characterized in that, comprising: the slip supply arrangement of base feed slush pulp; From the material liquid somaplasm of supplying with by this supply arrangement, remove the screen cloth of field trash; With the head box that is located at these screen cloth downstream, comprise that also stick adds equipment, its be used for adding in the material liquid somaplasm before above-mentioned screen cloth is removed field trash concentration be 0.1~3.0 weight % copy the aqueous solution of paper with stick.
Preferred above-mentioned slip supply arrangement comprises the pump that is connected with the upper reaches of above-mentioned screen cloth through pipe arrangement.
Preferred above-mentioned stick interpolation equipment comprises the pipe arrangement that appends that is connected with the pipe arrangement that is connected above-mentioned screen cloth and said pump.
Preferred above-mentioned screen cloth comprises: the housing with slip supply port and slip outlet; Be housed in this housing and have the cylinder in a plurality of gaps; With the blade part with a plurality of blades of rotation around this cylinder, the spatial communication between above-mentioned slip supply port and above-mentioned housing and the above-mentioned cylinder, the spatial communication of above-mentioned slip outlet and above-mentioned drum.
Preferred above-mentioned housing also have and above-mentioned housing and above-mentioned cylinder between the foreign matter outlet of spatial communication.
Other purpose of the present invention, feature and advantage can clearly be known from the explanation of the following embodiment that carries out based on accompanying drawing.
Description of drawings
Fig. 1 is an expression summary construction diagram of copying an example of the equipment that uses in the paper method of the present invention.
Fig. 2 is the vertical disconnected side view of the major part of pattern ground expression screen cloth.
Fig. 3 is the cross-section side view along the III-III line of Fig. 2.
Fig. 4 is the vertical disconnected side view of the major part of pattern ground expression head box.
The specific embodiment
Below, based on accompanying drawing embodiment of the present invention is elaborated.
Example as the paper machine with the screen cloth that uses in the present invention comprises best shaping paper machine, suction breast roll shaping paper machine, meniscus former paper machine, two net formula paper machines etc.
Fig. 1 is illustrated in schematic configuration of copying the equipment X1 that uses in the paper method of the present invention.This equipment X1 has pump 1, screen cloth 2, head box 3 and the pipe arrangement that is connected them, and the paper method of copying of embodiment of the present invention generates paper from the material liquid somaplasm.
As the pump 1 of slip supply arrangement, under the pressure of regulation,, the material liquid somaplasm that is included in the paper pulp fiber that generates in the paper pulp operation is seen off to screen cloth 2 through pipe arrangement 5.
Screen cloth 2 is removed the field trash that in the material liquid somaplasm, comprises, and makes being uniformly dispersed of material liquid somaplasm.In Fig. 1, just roughly represent screen cloth 2.The more detailed structure of screen cloth 2 is represented in Fig. 2 and Fig. 3.
That is, as shown in Figures 2 and 3, screen cloth 2 mainly comprises housing 21, lid 22, screen drum 23, blade part 24 and drive motor 25.Housing 21 has slip supply port 21a, slip outlet 21b and foreign matter outlet 21c.The inner utilization lower part dividing plate 21d and the top dividing plate 21e of housing 21 separate.Lid 22 can shake (can open and close) through hinge 26 and be connected with the upper end of housing 21.
Screen drum 23 possesses: be fixed on the inner cylinder portion 23a on the dividing plate 21d of lower part; Be fixed on the 23b of urceolus portion on the dividing plate 21d of top with the mode of surrounding this inner cylinder portion 23a; With the upper end wall 23c that is connected these inner cylinder portion 23a and the 23b of urceolus portion.The lower ending opening of the 23b of urceolus portion is communicated with slip outlet 21b through the central opening of top dividing plate 21e.In addition, the 23b of urceolus portion is formed on the circumferencial direction devices spaced apart, at a plurality of gap 23d that direction of principal axis extends, and the interior or exterior space of the 23b of urceolus portion is communicated with through these gaps 23d.The bearing of trend of gap 23d also can be the circumferencial direction of the 23b of urceolus portion.The length in each gap can suitably be selected.In addition, in Fig. 2 and Fig. 3, in order to illustrate conveniently, the exaggerative width in gap that draws is in fact fine than illustrated width.
Blade part 24 comprise the upper end wall 23c that is positioned at screen drum 23 the top support plate 24a and around the 23b of urceolus portion of screen drum 23, a plurality of (being 4 in the illustrated embodiment) the blade 24b that hangs down downwards from above-mentioned support plate 24a.As shown in Figure 3, each blade 24b has the such shape of aircraft wing, be positioned at screen drum 23 the 23b of urceolus portion near.
Drive motor 25 for example is fixed on the dividing plate 21d of lower part, has the output shaft 25a of the inner cylinder portion 23a extension that connects screen drum 23.The upper end of output shaft 25a is connected with the central authorities of the support plate 24a of blade part 24.When making drive motor 25 work, blade 24b for example rotates along the arrow A direction of Fig. 3.
As slip supply port 21a through screen cloth 2; Supply is added with when copying paper with the material liquid somaplasm of stick (will set forth in the back about this adding method); This material liquid somaplasm is pressed the extremely narrow gap 23d that passes through screen drum 23 while the contact on the in advance limit of the blade 24b that receives high-pressure rotary, in the material liquid somaplasm, acts on than higher shearing force on the contained paper pulp fiber thus.As a result, complement each other with copying the lubrication of paper with stick, paper pulp fiber under the homodisperse state, is discharged through slip supply port 21a in slip.On the other hand, contained field trash in the slip (solids beyond the paper pulp fiber) can not pass through gap 23d, temporarily is bonded on the outer surface of the 23b of urceolus portion of screen drum 23.Yet, owing to become negative pressure, utilizing this suction function at the back capable avris of blade 24b, the field trash that is stained with is stripped from, is fallen by deadweight, discharges from foreign matter outlet 21c.
Head box 3 constitutes the part of paper machine, and is as shown in Figure 4, slip (representing with mottled in the figure) is injected on the metal wire 4 of circulation walking.
Turn back to Fig. 1, be used to add and copy paper and be connected with the pipe arrangement 5 of hitch pump 1 and screen cloth 2 with the pipe arrangement 5a of the stick aqueous solution.As paper can be enumerated the PEO class with the stick aqueous solution the aqueous solution of copying that is added.
When having the paper machine work of above structure, through the running base feed slush pulp of pump 1.Raw material through pump 1 is imported into pipe arrangement 5.At this, through pipe arrangement 5a with adding in the material liquid somaplasm as copying the PEO class aqueous solution of paper with stick.Modulating this aqueous solution makes its concentration be the setting in 0.1~3.0 weight % scope.The modulator approach of the PEO aqueous solution does not have special qualification, for example, can use the dissolving tank of the stainless steel with mixing plant yet, this groove in stir on one side, the powder of paper with the PEO of stick copied in the dissolving conduct in water on one side.In pipe arrangement 5, the material liquid somaplasm with copy paper and use the stick aqueous solution, this mixture (following this mixture is called " mixed slurry ") is transported to screen cloth 2.
What explained is mixed slurry to be imported the inside of screen cloth 2 through slip supply port 21a shown in Figure 2.Utilize the high-speed stirred of blade 24b to make bigger shear action on the mixed slurry of the 23b of urceolus portion of pressing to screen drum 23.The field trash that carries out through this shearing comprising in the mixed slurry remove the dispersion with fiber.Simultaneously, what in mixed slurry, comprise copies paper with in the stick aqueous solution, copies paper and breaks off with the combination of a stick part, causes viscosity to reduce a little, but fully keeps the viscosity that can suitably bring into play the paper pulp dispersion effect.
Discharge from screen cloth 2 through slip outlet 21b, and copy the mixed slurry that paper suitably disperses with stick and utilize head box 3 (Fig. 4) to carry out rectification, be injected in equably on the metal wire 4 of continuous walking.The paper pulp dispersion effect of paper with stick copied in utilization, and the contained paper pulp fiber of mixed slurry is disperseed on metal wire 4 equably.Then, make the mixed slurry dehydration,, generate paper as finished product through each operations such as squeezing, dryings.
Copy in the paper method of the present invention, use stick, also can not damage original dispersion effect and apply flexibly effectively even the PEO class that macromolecule quantizes is copied paper.That is, through use PEO class stick, can significantly reduce the paper of copying that becomes shortcoming to dissolve, dilute needed water consumption all the time with stick.Present inventors find out to solve and copy PEO class that the high macromolecule of paper effect quantizes and copy paper with effective method for using of stick with copy the paper method of copying that man of paper plant is regarded as the minimizing of copying the paper water of problem.The result finds; If the PEO class that macromolecule quantizes copy paper with the concentration ratio of stick general add copy paper with significantly raising (0.1~3.0 weight %) of stick concentration (0.01 weight % is following); Even then in screen cloth 2, apply high shearing; Also can not damage dispersion effect, in the material liquid somaplasm, disperse to copy paper expeditiously and use stick.
In originally copying the paper method, the concentration of copying the paper use stick aqueous solution that is added in the material liquid somaplasm is 0.1~3.0 weight %, is preferably 0.1~1.0 weight %, more preferably 0.1~0.5 weight %.
Copy under the situation of concentration less than 0.1 weight % of paper with the stick aqueous solution what add,, copy the paper pulp dispersion effect reduction of paper, so the improved texture effect of paper is insufficient with stick because the viscosity that the shearing in the screen cloth 2 causes reduces.On the other hand; Add copy paper with the concentration of the stick aqueous solution above under the situation of 3.0 weight %; Because it is high with the stick viscosity in aqueous solution to copy paper; In head box 3, becoming can not well-mixed state, uses the stick aqueous solution to form aggegation to be strip or block position, to hinder the dispersion of paper pulp fiber so on metal wire 4, copy paper.Therefore, the paper that takes place to break etc. are bad, and the worry that becomes and can not stably manufacture paper with pulp is arranged.In addition, on the paper that generates, produce damaged parts such as spot and hole, the worry that has the quality brought to descend.
Copying paper in interpolation uses under the situation of place as the downstream of screen cloth 2 of stick; Owing to can not apply sufficient shearing force; Can not mix equably with the material liquid somaplasm with stick so copy paper,, copy paper and use the stick aqueous solution to form the position that aggegation is strip or bulk with above-mentioned same; Hinder the dispersion of paper pulp fiber or need dilution to copy paper and use stick stoste, adjustment viscosity.On the other hand; Copy under the situation of paper with stick in the interpolation of the upper reaches of pump 1, owing to when through pump 1, big shearing is applied to copies paper in addition with on the stick; The combination of the part of stick molecule is blocked; Cause viscosity to reduce greatly,, need to use a large amount of paper of copying to use stick therefore in order to obtain the production paper of excellent quality.But, if in the downstream of pump 1 and before in screen cloth 2, removing field trash, owing to even dispersion for paper pulp fiber; Can utilize the high shear force of screen cloth 2; Therefore, for example also can open the lid 22 of screen cloth 2, directly will copy in the aqueous solution input housing 21 of paper with stick.
As above; Suitably selecting to copy the point of addition of paper, and to make the concentration of copying the paper use stick aqueous solution of interpolation be under the situation of 0.1~3.0 weight %, can effectively utilize the high shear force of screen cloth 21 with stick; Suitably bring into play the paper pulp dispersion effect; Simultaneously, not only can prevent the generation of damaged parts such as spot or hole, and can significantly reduce the water use amount than in the past.Therefore, utilize the paper method of copying of the present invention, can obtain the paper of excellent quality, can improve the quality with few water use amount (promptly low-cost).
In addition, copy in the paper method, copy paper and use stick, can reduce faults such as disperseing bad caused disconnected paper by paper pulp fiber, can stably manufacture paper with pulp through suitably using of the present invention.Therefore, utilize and originally copy the paper method, can improve the yield rate of copying paper, improve production efficiency.
From viewpoints such as the dispersiveness of paper pulp and processing, to copy the paper of copying that uses in the paper method be 400~1100mPas with 0.5 weight % solution viscosity of stick (PEO) of the present invention, and it is effective being preferably 600~900mPas.In addition, it is different and various according to the kind of paper with the use amount of stick to copy paper, does not have special qualification.But the dry weight with respect to the paper that is generated is 0.001~1.0%, is preferably 0.01~0.5%, and is effective.
In addition, the paper method of copying of the present invention is 10~60g/m at weight per unit area preferably 2About thin paper (general weight per unit area is 5~15g/m 2) and toilet paper (general weight per unit area is 5~30g/m 2) use in the manufacturing of the tissue paper that waits, but be not limited thereto.
Then, with the comparative example contrast, embodiments of the invention are described.
Embodiment 1
(copying the paper method)
The equipment that uses above-mentioned embodiment to relate to generates paper from the material liquid somaplasm.In the present embodiment, paper machine uses meniscus former paper machine, is that 1300m/min (spool velocity is 1100m/min), the weight per unit area of manufacturing paper with pulp are 13g/m with the speed of manufacturing paper with pulp 2The condition of thin paper turn round.In copying paper material, use beating degree to be NBKP (coniferous tree the paper pulp)/LBKP (broad leaf tree paper pulp)=40/60 (weight ratio) of 640mlcsf (canadian standard freeness) material liquid somaplasm as 0.15 weight %.Copy paper and use PEO (trade name: PEO-18Z, solution viscosity are 430mPas (0.5%), Sumitomo Seika Co., Ltd's system) with stick; It is dissolved in fully stirring of back in the water, as copying the PEO aqueous solution of paper with the stick aqueous solution, preparation 0.5 weight %.Pipe arrangement 5 between pump 1 and screen cloth 2 adds this PEO aqueous solution and copies paper.Copying the use amount of paper with stick, is 0.14% with respect to the weight rate of the dry weight of the paper that is generated.
(evaluation of the quality of paper)
To copying the paper that the paper method obtains, estimate the effect of improving of quality by above-mentioned.Evaluation is carried out through the range estimation judgement; Evenly disperse with paper pulp fiber; Do not have the condensation portion of hole and paper pulp fiber to grade fully, the improved texture effect is big is ◎; With paper pulp fiber evenly disperse, almost do not have the condensation portion of hole and paper pulp fiber to grade, the improved texture effect is big is zero, that almost can not see with the improved texture effect is △, with the condensation portion of visible bore and paper pulp fiber grade, the quality difference or cause disconnected paper etc. copy paper bad for *.Expression is about the paper that is obtained by present embodiment, the result who confirms quality and water use amount in table 1.
(copying the mensuration of paper) with the stick solution viscosity
As follows the PEO class of using in the present invention being copied paper measures with the solution viscosity of stick.In the 1L glass beaker that sell in market, fill the pure water of 500g, utilize the mixer of the flat wing that has vertical 25mm, horizontal 80mm concurrently, with the rotation number stirring pure water of 240rpm.Very carefully make the PEO class of 2.5g copy paper and mix with this pure water, make not form pimple, stir dissolving in 3 hours then with stick.The Type B rotation viscometer of beautiful (tokimec) corporate system of eastern machine is used in viscosimetric analysis, under the rotation number of 12rpm, reads the value after measuring in 3 minutes, tries to achieve solution viscosity.In addition, measure the employed PEO class aqueous solution and use the aqueous solution that under 25 ℃ constant temperature, forms in advance.
Embodiment 2
In the present embodiment, use the PEO (commodity be called PEO-27, Sumitomo Seika Co., Ltd system) of 0.5 weight % solution viscosity as 720mPas.Use stick as copying paper.Except copying the kind of paper, under the condition identical, copy paper with embodiment 1 with stick.Copying paper and use the use amount of stick to do, is 0.11% with respect to the weight rate of the dry weight of the paper that is generated.Expression is about the paper that is obtained by present embodiment, the result who confirms quality and water use amount in table 1.
Embodiment 3
In the present embodiment, except the PEO that uses 0.1 weight % as copying paper with the stick, under the condition identical, copy paper with embodiment 2.Copying use amount that paper uses stick is 0.13% for the weight rate with respect to the dry weight of the paper that is generated.Expression is about the paper that is obtained by present embodiment, the result who confirms quality and water use amount in table 1.
Comparative example 1
In this comparative example, except the PEO that uses 0.05 weight % as copying paper with the stick, with the condition of embodiment 1 under copy paper.Copying use amount that paper uses stick is 0.20% for the weight rate with respect to the dry weight of the paper that is generated.Expression is about the paper that is obtained by this comparative example, the result who confirms quality and water use amount in table 1.
Comparative example 2
In this comparative example, be located between screen cloth 2 and the head box 3 destroying the interpolation place of paper with stick, make and copy paper and use the interpolation concentration of stick to be 70ppm.Except copy paper with the interpolation of stick local with add the concentration, under the condition identical, copy paper with embodiment 1.Copying use amount that paper uses stick is 0.14% for the weight rate with respect to the dry weight of the paper that is generated.Expression is about the paper that is obtained by this comparative example, the result who confirms quality and water use amount in table 1.
Comparative example 3
In this comparative example, be located between screen cloth 2 and the head box 3 destroying the interpolation place of paper with stick.Except destroying the interpolation place of paper, under the condition identical, copy paper with embodiment 1 with stick.Copying use amount that paper uses stick is 0.14% for the weight rate with respect to the dry weight of the paper that is generated.Expression is about the paper that is obtained by this comparative example, the result who confirms quality and water use amount in table 1.
[table 1]
Figure G2007800088947D00101
In embodiment 1~3, destroy molecular weight, concentration of aqueous solution, the interpolation place of paper through what decision in the scope of regulation was added with stick, compare with the comparative example that generally knows that 2 all the time, to the water use amount to improve effect big.In addition, because the shearing of the screen cloth 2 through utilizing the inventive method can improve than the dispersiveness that made stick in the past better, the quality of the finished paper that obtains is improved than existing method.
As comparative example 1, under the low situation of the interpolation concentration of PEO,, cause that through the shearing in the screen cloth 2 the stick viscosity in aqueous solution reduces because the stick viscosity in aqueous solution is low, the stick use amount significantly increases.
As comparative example 3; Copying under the situation of paper with the stick aqueous solution to interpolation high concentration between screen cloth 2 and the head box 3; Owing to utilize stick is disperseed equably in the material liquid somaplasm, so can know that quality significantly reduces than the shearing in the head box a little less than the shearing of screen cloth 23.

Claims (4)

1. copy the paper method for one kind, it uses paper machine, and said paper machine comprises: the pump of supplying with the material liquid somaplasm that is included in the paper pulp fiber that generates in the pulping process; From the material liquid somaplasm of supplying with by this pump, remove the screen cloth of field trash; With the head box that is located at these screen cloth downstream, the said paper method of copying is characterised in that:
Be included in the downstream of the said pump of the paper pulp fiber material liquid somaplasm that generates in the pulping process in supply, that in utilizing the material liquid somaplasm of said screen cloth before removing field trash, adds concentration and be 0.1~3.0 weight % copies the aqueous solution of paper with stick.
2. the paper method of copying as claimed in claim 1 is characterized in that:
The said paper of copying uses stick to be PEO class stick, and the said 0.5 weight % solution viscosity of copying paper use stick is 400~1100mPas.
3. the paper method of copying as claimed in claim 1 is characterized in that:
The said paper of copying adds in the material liquid somaplasm that in the pipe arrangement that connects said slip supply arrangement and said screen cloth, flows with the aqueous solution of stick.
4. the paper method of copying as claimed in claim 1 is characterized in that:
In said screen cloth, the said paper of copying is added on through in the material liquid somaplasm before the screen drum with the aqueous solution of stick.
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EP1475476A1 (en) * 2003-05-05 2004-11-10 German Vergara Lopez Process for improving retention and drainage in the manufacturing of paper, paperboard, cardboard
CN1603515A (en) * 2004-11-09 2005-04-06 华东理工大学 Method for manufacturing high strength fiber network sandwich paper

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JP3206500B2 (en) * 1997-07-02 2001-09-10 王子製紙株式会社 Processing method of raw materials for laminated substrate
JP2005126880A (en) * 2003-10-02 2005-05-19 Daiyanitorikkusu Kk Nonionic viscous agent for papermaking
JP2006097191A (en) * 2004-09-30 2006-04-13 Crecia Corp Tissue paper having excellent touch
EP1950345B1 (en) * 2005-10-25 2013-09-11 Sumitomo Seika Chemicals Co., Ltd. Papermaking method and papermaking system

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EP1475476A1 (en) * 2003-05-05 2004-11-10 German Vergara Lopez Process for improving retention and drainage in the manufacturing of paper, paperboard, cardboard
CN1603515A (en) * 2004-11-09 2005-04-06 华东理工大学 Method for manufacturing high strength fiber network sandwich paper

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JP4977127B2 (en) 2012-07-18
KR20080107469A (en) 2008-12-10
KR101331233B1 (en) 2013-11-18
TW200736466A (en) 2007-10-01

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