CN114922001B - Household paper preparation method and pulp preparation system - Google Patents
Household paper preparation method and pulp preparation system Download PDFInfo
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- CN114922001B CN114922001B CN202210334074.3A CN202210334074A CN114922001B CN 114922001 B CN114922001 B CN 114922001B CN 202210334074 A CN202210334074 A CN 202210334074A CN 114922001 B CN114922001 B CN 114922001B
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- 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
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
- D21D1/30—Disc mills
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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Abstract
The invention discloses a preparation method and a pulp preparation system of household paper, wherein the preparation method of the household paper comprises the steps of providing long fiber pulp and short fiber pulp; respectively carrying out slurry dispersing treatment on the long fiber slurry and the short fiber slurry; pulping the dispersed long fiber pulp to obtain long fiber pulp; fluffing the short fiber pulp after pulp dispersion to obtain short fiber pulp; mixing long fiber slurry and short fiber slurry, and performing pulping treatment on the mixed slurry to obtain mixed slurry, wherein the content of fine fibers in the mixed slurry is 25% -30%, and the fine fibers comprise particle parts which can pass through a 200-mesh screen in the plant fiber slurry; and (5) making the ground mixed pulp to obtain the household paper. Through the mode, the method can control the content of the fine fibers in the slurry within a proper range, overcome the defect that the household paper is easy to fall off the hair and the powder, and reduce the dosage of the functional auxiliary agent.
Description
Technical Field
The invention relates to the technical field of pulping and papermaking, in particular to a preparation method and a pulp preparation system of household paper.
Background
The preparation process flow of the household paper is longer, the fiber raw material can pass through a pulp dispersing machine, a fluffer, a pulping machine and other equipment in the pulp preparation treatment process, and more fine fibers can be generated under the mechanical force action of a pulp flow system, and the fine fibers and the conventional fibers are easy to fall off from the paper due to smaller binding force, so that the phenomenon of fluff and powder falling can occur when a consumer uses the household paper, and the use experience of the paper is affected; meanwhile, due to the functional requirements, functional auxiliaries such as a wet strength agent and a softening agent are required to be added into the pulp in the preparation process of the household paper, compared with the conventional fiber, the pulp has large specific surface area of the fine fiber and large negative charge amount, the pulp can be combined with the functional auxiliaries first, the fine fiber content in the pulp system is too large or too small, the consumption of various functional auxiliaries is increased, and the production cost is high, so that the reasonable control of the fine fiber content is beneficial to improving the paper quality and reducing the consumption of the functional auxiliaries.
Disclosure of Invention
The invention mainly solves the technical problem of providing a preparation method and a pulp preparation system for household paper, which can control the content of fine fibers in pulp within a proper range, overcome the defect that household paper is easy to fall off wool and powder, and reduce the consumption of functional auxiliary agents.
In order to solve the technical problems, the invention adopts a technical scheme that: a method for preparing household paper is provided, which comprises providing long fiber pulp and short fiber pulp; respectively carrying out slurry dispersing treatment on the long fiber slurry and the short fiber slurry; pulping the dispersed long fiber pulp to obtain long fiber pulp; fluffing the short fiber pulp after pulp dispersion to obtain short fiber pulp; mixing long fiber slurry and short fiber slurry, and performing pulping treatment on the mixed slurry to obtain mixed slurry, wherein the content of fine fibers in the mixed slurry is 25% -30%, and the fine fibers comprise particle parts which can pass through a 200-mesh screen in the plant fiber slurry; and (5) making the ground mixed pulp to obtain the household paper.
Wherein, respectively carrying out the loose pulp treatment on the long fiber pulp and the short fiber pulp comprises the following steps: and respectively mixing the long fiber pulp and the short fiber pulp with clean water, and then carrying out slurry dispersing treatment, wherein the clean water is white water obtained by treating the wire water of the wire forming section in the paper making process by a multi-disc fiber recycling machine.
Wherein, the concentration of the clean water is 15ppm to 25ppm.
The method comprises the steps of mixing the mixed pulp with the wire water of a wire forming section and the cushion pulp to obtain recovered pulp, wherein the cushion pulp comprises the mixed pulp; and (3) delivering the recovered pulp into a multi-disc fiber recovery machine for treatment to obtain clear water.
Wherein, the content of the cushion layer slurry in the recovered slurry is 10-15%.
Wherein, carry out the loose thick liquid processing to long fiber thick liquid still includes: and adding 0.05 to 0.1 percent of sodium carboxymethyl cellulose into the long fiber slurry, wherein the adding amount of the sodium carboxymethyl cellulose is based on the weight percentage of the absolute dry long fiber slurry.
Wherein mixing the long fiber slurry and the short fiber slurry, and performing a refining treatment on the mixed slurry comprises: the mixing proportion of the long fiber slurry and the short fiber slurry is (20% -40%): (50% -80%).
Mixing long fiber slurry, short fiber slurry and damaged paper slurry to obtain mixed slurry; wherein the mixing proportion of the long fiber slurry and the short fiber slurry to the broke slurry is (20% -40%): (50% -80%): (5% -20%).
Wherein a broke pulp is provided; carrying out pulp dispersion treatment on the damaged pulp; fluffing the broken pulp after pulp dispersion to obtain broken pulp; wherein the freeness of the defibering paper pulp after defibering is 350-450 ml.
Wherein, the long fiber slurry and the short fiber slurry are mixed, and the mixed slurry is subjected to pulping treatment and then further comprises: and adding 0.0025 to 0.005 percent of electric neutralizing agent into the mixed pulp, wherein the addition amount of the electric neutralizing agent is based on the weight percentage of the absolute dry mixed pulp, and the electric neutralizing agent has strong positive charges.
Wherein, the content of the fine fiber in the mixed pulp is 25-30%, and the fine fiber comprises a particle part which can pass through a 200-mesh screen in the plant fiber pulp.
Wherein, the pulping treatment of the dispersed long fiber pulp to obtain the long fiber pulp comprises the following steps: the long fiber pulp is subjected to pulp refining treatment by a pulp refiner, the power of the pulp refiner is 50-70 kwh/t, the throughput is 2000-3000L/min, and the freeness of the long fiber pulp after pulp refining is 520-600 ml.
Wherein, the defibering treatment of the short fiber pulp after the pulp dispersion to obtain the short fiber pulp comprises the following steps: the freeness of the defibering pulp after defibering is 500-550 ml.
Wherein, the mixed pulp is subjected to pulp refining treatment by a modified pulp grinder, the power of the modified pulp grinder is 10-30 kwh/t, the throughput is 3000-4500L/min, and the freeness of the mixed pulp after pulp refining is 320-420 ml.
In order to solve the technical problems, the invention adopts another technical scheme that: the pulp preparation system comprises a long fiber flow-in part, a short fiber flow-in part and a net flow-in part, wherein the long fiber flow-in part at least comprises a long fiber pulp dispersing machine and a pulp grinder, the long fiber pulp dispersing machine is used for carrying out pulp dispersing treatment on long fiber pulp, and the pulp grinder is used for carrying out pulp grinding treatment on the long fiber pulp after pulp dispersing so as to obtain long fiber pulp; the short fiber flow part at least comprises a short fiber pulp dispersing machine and a fluffer, wherein the short fiber pulp dispersing machine is used for carrying out pulp dispersing treatment on short fiber pulp, and the fluffer is used for carrying out fluffing treatment on the short fiber pulp after pulp dispersing so as to obtain short fiber pulp; the upper net flow part at least comprises a mixing tank and a modifying and pulping machine, wherein the mixing tank is used for mixing long fiber pulp and short fiber pulp to obtain mixed pulp, the modifying and pulping machine is used for pulping the mixed pulp, the content of fine fibers in the processed mixed pulp is 25% -30%, and the fine fibers comprise particle parts which can pass through a 200-mesh screen in the plant fiber pulp.
The pulp preparation system further comprises a broke flow part, wherein the broke flow part at least comprises a broke pulp dispersing machine and a broke fluffer, the broke pulp dispersing machine is used for carrying out pulp dispersing treatment on the broke pulp, and the broke fluffer is used for carrying out fluffing treatment on the broken pulp after pulp dispersing so as to obtain a broken pulp material.
The beneficial effects of the invention are as follows: compared with the prior art, the invention can effectively control the inflow and the generation of the fine fibers in the pulp preparation process by adjusting the long fiber pulp grinding, the short fiber fluffing and the modified pulp grinding of the mixed pulp, and the fine fiber content in the treated mixed pulp is 25-30%. The fiber content in the sizing agent before surfing the internet is controlled, so that the fluff and powder removal rate of the finished paper is effectively reduced, the problem that the household paper is easy to fluff and powder in the use process is solved, the consumption of the functional auxiliary agent is reduced, the use effect of the functional auxiliary agent is improved, and the production cost is reduced.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of a method for producing household paper according to the present application;
FIG. 2 is a schematic diagram of an embodiment of a slurry preparation system of the present application;
FIG. 3 is a schematic view of another embodiment of the slurry preparation system of the present application;
fig. 4 is a schematic structural view of a further embodiment of the pulp preparation system of the present application.
Detailed Description
In order to make the objects, technical solutions and effects of the present application clearer and more specific, the present application will be further described in detail below with reference to the accompanying drawings and examples.
The utility model provides a household paper preparation method and pulp preparation system, through selecting long fine, the loose thick liquid water of short fiber, adjust long fine thick liquid, short fiber is dredged and the modification of mixed thick liquid grinds degree of thick liquid, with the inflow and the production of effective management and control tiny fiber in pulp preparation flow, through the tiny fiber content in the thick liquid before the control is online, effectively reduce the unhairing and powder-removing rate of finished paper, solve the household paper and easily fall the problem of the unhairing and powder-removing in the use, reduce functional auxiliary agent quantity simultaneously, improve the result of use of functional auxiliary agent, reduce manufacturing cost.
Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a method for preparing household paper according to the present application. In this embodiment, the method for producing a household paper includes:
s110: long fiber pulp and short fiber pulp are provided.
Among them, the long fiber pulp is preferably softwood pulp, and the short fiber pulp is preferably hardwood pulp. Further, the softwood pulp can be selected from North America softwood pulp, and the hardwood pulp can be selected from acacia wood pulp, eucalyptus wood pulp and the like.
The long fiber pulp and the short fiber pulp can be pulp in the form of pulp board or wet pulp; the long fiber pulp and the short fiber pulp can be bleached pulp, semi-bleached pulp, unbleached pulp and the like; the long fiber pulp and the short fiber pulp can also be non-wood pulp, such as bamboo pulp, grass pulp, sugarcane pulp, etc.
S120: and respectively carrying out slurry dispersing treatment on the long fiber slurry and the short fiber slurry.
Wherein, the long fiber pulp and the water for pulp dispersion can be added into a long fiber pulp dispersing machine for pulp dispersion treatment. Similarly, the short fiber pulp and the water for pulp dispersion are added into a short fiber pulp dispersing machine to carry out pulp dispersion treatment. The dispersion treatment of the long fiber pulp and the dispersion treatment of the short fiber pulp can be performed synchronously and parallelly, or can be performed step by step.
S130: pulping the dispersed long fiber pulp to obtain long fiber pulp; and carrying out fluffing treatment on the short fiber slurry after the slurry dispersion to obtain the short fiber slurry.
Wherein, the long fiber pulp after pulp dispersion can be added into a pulp grinder for pulp grinding treatment; and adding the short fiber pulp after pulp dispersion into a fluffer for fluffing treatment. The refining treatment of the long fiber pulp and the defibering treatment of the short fiber pulp can be performed synchronously and parallelly, or can be performed step by step.
S140: mixing the long fiber slurry and the short fiber slurry, and performing pulping treatment on the mixed slurry.
The long fiber pulp and the short fiber pulp can be mixed according to a certain proportion to obtain mixed pulp, and the mixed pulp is subjected to pulp grinding treatment.
S150: and (5) making the ground mixed pulp to obtain the household paper.
Specifically, the mixed slurry is formed by net surfing, pressed, dried and wrinkled to prepare the household paper.
In the embodiment, through adjusting the long fiber pulping, the short fiber fluffing and the mixed pulp modification pulping, inflow and production of fine fibers can be effectively controlled in a pulp preparation flow, and through controlling the fine fiber content in pulp before surfing, the fluff and powder removal rate of finished paper is effectively reduced, the problem that household paper is easy to lose fluff and powder in the use process is solved, meanwhile, the consumption of functional auxiliary agents is reduced, the use effect of the functional auxiliary agents is improved, and the production cost is reduced.
In one embodiment, the water for dispersing the long fiber pulp and the short fiber pulp is clean water, and the clean water is white water obtained by treating the web water of the upper web forming section in the paper making process of the household paper by a multi-disc fiber recovery machine (PDF). The concentration of the clear water may be 15ppm to 25ppm. The fiber content in the clear water is very low, and the fine fibers brought into the long fiber pulp and short fiber pulp treatment process are basically negligible. In addition, the white water generated in the paper making process is recycled by adopting the clear water dispersed pulp, so that the white water recycling is realized, and the production cost is reduced.
In one embodiment, the long fiber pulp after pulp dispersion is subjected to pulp refining treatment by a pulp refiner, the power of the pulp refiner is 50-70 kwh/t, the throughput is 2000-3000L/min, and the freeness of the long fiber pulp after pulp refining is 520-600 ml.
Further, the fibers in the long fiber slurry are longer and are easy to be clustered and bundled, and the fiber clusters or fiber bundles are easier to be cut off in the pulping process of the pulping machine, so that the generation probability of fine fibers is increased. In a preferred embodiment, sodium carboxymethylcellulose (CMC) is added into the long fiber dispersing machine at the same time of dispersing the long fiber pulp before the long fiber pulp is subjected to the pulping treatment, so that the dispersibility of the long fiber pulp is improved, and the probability of generating fine fibers in the treatment process of the long fiber pulp is reduced.
Preferably, the addition amount of the sodium carboxymethyl cellulose is 0.07-0.08 percent, and the addition amount is based on the weight percentage of the absolute dry long fiber slurry.
In one embodiment, the fluffer is used to fluffe the fluff pulp after the pulp is dispersed, and the freeness of the fluff pulp after fluffing is 500-550 ml.
In one embodiment, the long fiber pulp obtained after pulp refining and the short fiber pulp obtained after defibering are mixed according to a predetermined ratio, wherein the mixing ratio is (20% -40%): (50% -80%), preferably the mixing ratio is (20% -30%): (70% -80%), wherein the percentage content is mass percentage content.
In one embodiment, broke pulp may also be added to the mixed pulp, i.e. long and short fiber pulps and broke pulp are mixed to obtain a mixed pulp. In this way, recycling of the broke pulp can be achieved to reduce manufacturing costs.
The broken paper refers to leftover material parts such as paper edges, paper heads, paper tails and the like generated in the paper making process of the household paper, and the leftover material parts are recycled in the embodiment to reduce waste.
The broken paper and the clean water can be added into a broken paper dispersing machine for dispersing, the obtained broken paper material is sent into a broken paper dispersing machine for dispersing, and the broken paper material is mixed with long fiber pulp and short fiber pulp after the broken paper material is dispersed to have the freeness of 350-450 ml, so as to obtain mixed pulp.
Wherein, the long fiber slurry, the short fiber slurry and the damaged paper slurry are mixed according to (20% -40%): (50% -80%): (5% -20%) and mixing to obtain the mixed slurry.
Preferably, the broke stock comprises 5% to 10% of the mixed stock.
Further, as the broke is recycled for the second time after the pulp preparation and the paper making process of the whole household paper, the binding force among the fibers is large, and in order to improve the pulp dispersing efficiency of the broke, in the embodiment, the clean water is heated to 35-45 ℃ through steam before the broke pulp dispersing machine is added.
Further, the mixed pulp is subjected to pulp refining treatment by a modified pulp grinder, the power of the modified pulp grinder is 10-30 kwh/t, the throughput is 3000-4500L/min, and the freeness of the mixed pulp after pulp refining is 320-420 ml.
In one embodiment, 0.0025% to 0.005% of an electrical neutralizing agent may be added to the refined mixed pulp in an amount based on the weight percent of the absolute dry mixed pulp. The electric neutralizing agent has strong positive charges and can adsorb redundant fine fibers in the mixed pulp, so that the redundant fine fibers are adsorbed and separated from the formed paper in the net forming process, and then discharged out of the papermaking system in the white water treatment process.
Furthermore, a wet strength agent can be added into the mixed pulp to improve the wet strength of the finished paper, wherein the addition amount of the wet strength agent is 13-14%, and the addition amount is based on the weight percentage of the absolute dry mixed pulp.
Further, a softener may be added to the mixed pulp to increase the softness of the finished paper, the amount of softener added being 1.5% to 2% by weight based on the absolute dry mixed pulp.
In one embodiment, the pulp is made into mixed pulp after pulping to prepare the household paper.
Specifically, the mixed slurry is formed by net surfing, pressed, dried and wrinkled to prepare the household paper.
Further, the mixed pulp is fed into a multi-disc fiber recovery machine (PDF) as bedding pulp by the net water formed by the net, and clear water and recovered pulp are obtained after filtering and fiber recovery treatment, and the clean water is used for dispersing long fiber pulp, short fiber pulp and broke.
The recovered pulp can be sent into a mixing tank for recycling or separately recycled for standby.
Wherein, the addition proportion of the cushion slurry is 10-15 percent, and the addition proportion is the mass percentage of the cushion slurry to the mixture of the net water fed into a multi-disc fiber recycling machine (PDF) and the cushion slurry.
When the addition proportion of the cushion slurry is higher than 15%, the load of a multi-disc fiber recycling machine (PDF) is increased, and the energy consumption is too high; when the addition proportion of the cushion pulp is lower than 10%, the recovery rate of the fibers in the white water under the net is low, the concentration of the obtained clean water is too high, the content of the fine fibers is high, and the pulp dispersing requirements of the long fiber pulp, the short fiber pulp and the broke in the preparation method of the household paper cannot be met. By adding the cushion pulp, the fine fibers in the white water can be adsorbed, and the fine fiber content in the white water can be controlled.
According to the preparation method of the household paper, provided by the invention, the water for long fiber and short fiber dispersing is selected, the degrees of long fiber pulping, short fiber fluffing and mixed pulp modifying and pulping are adjusted, so that inflow and generation of fine fibers are effectively controlled in a pulp preparation process, and the fluff and powder removal rate of finished paper is effectively reduced by controlling the fine fiber content in pulp before surfing, and the problem that the household paper is easy to remove fluff and powder in the use process is solved.
The application also provides a pulp preparation system for preparing pulp for the preparation of household paper.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of the slurry preparation system of the present application. In this embodiment, the pulp preparation system includes a long fiber flow section, a short fiber flow section, and a web flow section.
The long fiber flow part at least comprises a long fiber pulp dispersing machine and a pulp grinder, wherein the long fiber pulp dispersing machine is used for carrying out pulp dispersing treatment on long fiber pulp, and the pulp grinder is used for carrying out pulp grinding treatment on the long fiber pulp after pulp dispersing so as to obtain long fiber pulp.
The short fiber flow part at least comprises a short fiber pulp dispersing machine and a fluffer, wherein the short fiber pulp dispersing machine is used for carrying out pulp dispersing treatment on short fiber pulp, and the fluffer is used for carrying out fluffing treatment on the short fiber pulp after pulp dispersing so as to obtain short fiber pulp.
The upper net flow part at least comprises a mixing tank and a modifying and pulping machine, wherein the mixing tank is used for mixing long fiber pulp and short fiber pulp to obtain mixed pulp, and the modifying and pulping machine is used for pulping the mixed pulp.
Referring to fig. 3, fig. 3 is a schematic structural diagram of another embodiment of the slurry preparation system of the present application. In this embodiment, the pulp preparation system further comprises a broke flow part, and the broke flow part at least comprises a broke pulp dispersing machine and a broke fluffer, wherein the broke pulp dispersing machine is used for carrying out pulp dispersing treatment on the broke pulp, and the broke fluffer is used for carrying out fluffing treatment on the broke pulp after pulp dispersing so as to obtain a broke pulp material.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another embodiment of the slurry preparation system of the present application. In the embodiment, the pulp preparation system can be used for preparing mixed pulp for making household paper.
Specifically, long fiber pulp is sequentially processed by a long fiber dispersing machine, a long fiber discharging tower and a pulping machine, and the obtained long fiber pulp is sent into a long fiber post-beating tower. When the long fiber pulp is subjected to pulp dispersing treatment, the water for pulp dispersing is serum albumin, and sodium carboxymethyl cellulose can be added into a pulp dispersing machine at the same time, so that the dispersibility of the long fiber pulp is improved, and the probability of generating fine fibers in the treatment process of the long fiber pulp is reduced.
The short fiber slurry is processed by a short fiber dispersing machine, a short fiber discharging tower and a fluffer in sequence, the obtained short fiber slurry is sent into a short fiber post-knocking tower,
the damaged paper pulp is sequentially processed by a damaged paper dispersing machine, a damaged paper discharging tower and a fluffer, and the obtained damaged paper pulp is sent into a damaged paper knocking tower.
The long fiber slurry in the long fiber post-beating tower, the short fiber slurry in the short fiber post-beating tower and the damaged paper slurry in the damaged paper post-beating tower are mixed according to (20% -40%): (50% -80%): and (5% -20%) sending the mixture into a mixing tank for mixing, pumping the obtained mixed pulp into a modified pulping machine for pulping, and sending the pulp into a front tank of the machine. The content of the fine fiber of the mixed slurry in the tank before the machine is 25-30%, and the freeness is 320-420 ml. And (3) forming, squeezing, drying and wrinkling the mixed pulp in the machine front groove to obtain the household paper.
According to the pulp preparation system provided by the invention, the inflow and the generation of the fine fibers are effectively controlled in the pulp preparation working section of paper making of the household paper by controlling the fine fiber content and the freeness in the pulp in the front groove of the machine before surfing, so that the fluff and the powder removal rate of the finished paper are effectively reduced, the problem that the household paper is easy to fluff and powder in the use process is solved, the consumption of the functional auxiliary agent is reduced, and the use effect of the functional auxiliary agent is improved.
The following description will be made of several specific examples, but is not limited thereto, and should not be construed as limiting the scope of the claims.
The process parameters and the paper properties of the three examples of the invention (examples 1 to 3) with corresponding proportions are compared as follows: the same fiber proportion is adopted in each example and the corresponding comparative example, and the comparative example adopts the technological parameters and the paper physical properties of the existing preparation method of the household paper.
Table 1: household paper preparation process parameters and paper physical properties
Table 2: household paper preparation process parameters and paper physical properties
Table 3: household paper preparation process parameters and paper physical properties
As can be seen from the tables one to three, the paper prepared by the paper preparation method reduces the linting and dusting rate by 23% -25%, and reduces the addition amount of the softening agent by 24% -30% and the addition amount of the wet strength agent by 20% -24% when the softness and wet strength ratio are relative.
The detection of the hair and powder falling rate is carried out according to the equipment and the method of the 'determination of the powder falling rate' in GBT 20810-2018.
The household paper prepared by the preparation method of the household paper has the advantages that the fluff and powder falling rate is obviously reduced, the product quality is improved, meanwhile, the consumption of functional auxiliary agents (softening agent and wet strength agent) is greatly reduced, the use effect of the functional auxiliary agents is improved, and the production cost is reduced.
The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or direct or indirect application in other related technical fields are included in the scope of the present application.
Claims (10)
1. The preparation method of the household paper is characterized by comprising the following steps:
providing a long fiber slurry and a short fiber slurry;
respectively mixing the long fiber pulp and the short fiber pulp with clean water, and then carrying out slurry dispersing treatment, wherein the concentration of the clean water is 15 ppm-25 ppm; wherein, carry out the loose thick liquid treatment to long fiber thick liquid includes: adding 0.05% -0.1% of sodium carboxymethyl cellulose into the long fiber slurry, wherein the adding amount of the sodium carboxymethyl cellulose is based on the weight percentage of the absolute dry long fiber slurry;
pulping the dispersed long fiber pulp to obtain long fiber pulp; fluffing the short fiber pulp after pulp dispersion to obtain short fiber pulp;
mixing the long fiber slurry and the short fiber slurry, and performing pulping treatment on the mixed slurry to obtain mixed slurry, wherein the content of fine fibers in the mixed slurry is 25% -30%, and the fine fibers comprise particle parts which can pass through a 200-mesh screen in the plant fiber slurry;
adding 0.0025% -0.005% of an electric neutralizing agent to the mixed pulp, wherein the electric neutralizing agent is added in an amount of weight percent based on absolute dry mixed pulp, and the electric neutralizing agent has strong positive charges;
manufacturing the mixed pulp after pulping to prepare the household paper;
respectively mixing the long fiber pulp and the short fiber pulp with clean water, and then carrying out slurry dispersion treatment, wherein the clean water is white water obtained by treating the wire water of an upper wire forming section in the paper making process by a multi-disc fiber recycling machine; the concentration of the clean water is 15 ppm-25 ppm; wherein, the acquisition of clear water includes: mixing the mixed pulp with the wire water of the wire forming section and the cushion pulp to obtain recovered pulp, and sending the recovered pulp into the multi-disc fiber recovery machine to be treated to obtain the clean water; the cushion pulp comprises the mixed pulp, and the content of the cushion pulp in the recovered pulp is 10-15%.
2. The method of producing a household paper according to claim 1, wherein the mixing the long fiber slurry and the short fiber slurry, and performing a refining treatment on the mixed slurry comprises:
the mixing ratio of the long fiber slurry to the short fiber slurry is (20% -40%): (50% -80%).
3. A method of making household paper according to claim 1, further comprising:
providing broke pulp;
carrying out pulp dispersion treatment on the damaged pulp;
fluffing the broken pulp after pulp dispersion to obtain broken pulp;
mixing the long fiber slurry, the short fiber slurry and the damaged pulp slurry to obtain mixed slurry; wherein the mixing ratio of the long fiber pulp, the short fiber pulp and the broke pulp is (20% -40%): (50% -80%): (5% -20%).
4. A method for producing household paper according to claim 3, wherein,
and after defibering, the freeness of the broke slurry is 350-450 ml.
5. The method for producing household paper according to claim 1, wherein,
the pulping the dispersed long fiber pulp to obtain long fiber pulp comprises the following steps:
and (3) pulping the long fiber pulp by using a pulping machine, wherein the power of the pulping machine is 50-70 kwh/t, and the throughput is 2000-3000L/min.
6. The method for producing household paper according to claim 5, wherein,
and after pulping, the freeness of the long fiber pulp is 520-600 ml.
7. The method for producing household paper according to claim 5, wherein,
the defibering treatment of the short fiber pulp after the pulp dispersion to obtain short fiber pulp comprises the following steps:
and after defibering, the freeness of the short fiber pulp is 500-550 ml.
8. The method for producing household paper according to claim 1, wherein,
and (3) pulping the mixed pulp by using a modified pulping machine, wherein the power of the modified pulping machine is 10-30 kwh/t, and the throughput is 3000-4500L/min.
9. The method for producing household paper according to claim 8, wherein,
and after pulping, the freeness of the mixed pulp is 320-420 ml.
10. A pulp preparation system used in the preparation method of household paper according to claim 1, comprising a long fiber flow section, a short fiber flow section and a net flow section, wherein,
the long fiber flow part at least comprises a long fiber pulp dispersing machine and a pulp grinder, wherein the long fiber pulp dispersing machine is used for carrying out pulp dispersing treatment on long fiber pulp, 0.05-0.08% of sodium carboxymethyl cellulose is added into the long fiber pulp, and the adding amount of the sodium carboxymethyl cellulose is based on the weight percentage of absolute dry long fiber pulp; the pulping machine is used for carrying out pulping treatment on the long fiber pulp after pulp dispersion so as to obtain long fiber pulp; the method comprises the steps of carrying out papermaking, carrying out multi-disc fiber recovery, and carrying out slurry dispersion treatment, wherein the slurry dispersion treatment uses clean water, and the clean water is white water obtained by treating the net water of an upper net forming section in the papermaking process; the concentration of the clean water is 15 ppm-25 ppm;
the short fiber flow part at least comprises a short fiber pulp dispersing machine and a fluffer, wherein the short fiber pulp dispersing machine is used for carrying out pulp dispersing treatment on short fiber pulp, and the fluffer is used for carrying out fluffing treatment on the short fiber pulp after pulp dispersing so as to obtain short fiber pulp;
the upper net flow part at least comprises a mixing tank and a modifying pulping machine, wherein the mixing tank is used for mixing the long fiber slurry and the short fiber slurry to obtain mixed slurry, the modifying pulping machine is used for pulping the mixed slurry, the content of fine fibers in the mixed slurry after the treatment is 25% -30%, the fine fibers comprise particle parts which can pass through a 200-mesh screen in the plant fiber slurry, 0.0025% -0.005% of electric neutralizing agent is added into the mixed slurry, the addition amount of the electric neutralizing agent is based on the weight percentage of the absolute dry mixed slurry, and the electric neutralizing agent has strong positive charges.
Priority Applications (1)
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| CN110924227A (en) * | 2019-12-11 | 2020-03-27 | 泰盛科技（集团）股份有限公司 | Method for making bamboo pulp household paper and household paper |
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| CN102154895A (en) * | 2011-02-28 | 2011-08-17 | 江苏理文造纸有限公司 | Method for recycling white water by using white water recycling machine |
| CN103536235B (en) * | 2013-10-22 | 2016-07-06 | 金红叶纸业集团有限公司 | Paper for daily use and preparation method thereof |
| CN104631196A (en) * | 2015-01-28 | 2015-05-20 | 联盛纸业（龙海）有限公司 | Single-layer superlow-gram-weight liner cardboard paper production method |
| US10577748B2 (en) * | 2015-04-29 | 2020-03-03 | Essity Hygiene And Health Aktiebolag | Tissue paper comprising pulp fibers originating from miscanthus and method for manufacturing the same |
| CN107313299A (en) * | 2016-04-27 | 2017-11-03 | 上海东冠纸业有限公司 | A kind of preparation method of amenities high-air-permeability water suction lining paper |
| CN206768487U (en) * | 2017-02-14 | 2017-12-19 | 亚太森博(广东)纸业有限公司 | A kind of paper machine white water processing system |
| CN109235125B (en) * | 2017-07-11 | 2022-09-06 | 金红叶纸业(南通)有限公司 | Household paper and preparation method thereof |
| CN108685512B (en) * | 2018-05-25 | 2020-04-28 | 龙游旭荣纸业有限公司 | Paper towel and manufacturing method and application thereof |
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| CN110904735B (en) * | 2019-12-11 | 2022-06-17 | 泰盛科技（集团）股份有限公司 | Method for making bamboo pulp household paper and household paper |
| CN113584939A (en) * | 2020-04-30 | 2021-11-02 | 金红叶纸业(湖北)有限公司 | Household paper and preparation method thereof |
| CN112553962B (en) * | 2020-12-08 | 2023-04-07 | 上海东冠纸业有限公司 | Production method of high-strength and easy-to-disperse toilet wiping paper |
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| CN102587196A (en) * | 2012-01-17 | 2012-07-18 | 浙江理工大学 | Method for preparing antibacterial paper on the basis of interlayer self-assembling technology |
| CN110924227A (en) * | 2019-12-11 | 2020-03-27 | 泰盛科技（集团）股份有限公司 | Method for making bamboo pulp household paper and household paper |
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