CN116479681A - Environment-friendly antistatic antibacterial waterproof kraft paper and production process thereof - Google Patents
Environment-friendly antistatic antibacterial waterproof kraft paper and production process thereof Download PDFInfo
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- CN116479681A CN116479681A CN202310580670.4A CN202310580670A CN116479681A CN 116479681 A CN116479681 A CN 116479681A CN 202310580670 A CN202310580670 A CN 202310580670A CN 116479681 A CN116479681 A CN 116479681A
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- kraft paper
- antibacterial
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- 239000002655 kraft paper Substances 0.000 title claims abstract description 62
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000000123 paper Substances 0.000 claims abstract description 87
- 239000000835 fiber Substances 0.000 claims abstract description 45
- 239000011247 coating layer Substances 0.000 claims abstract description 26
- 239000012535 impurity Substances 0.000 claims abstract description 17
- 239000010893 paper waste Substances 0.000 claims abstract description 16
- 239000002002 slurry Substances 0.000 claims description 105
- 238000000576 coating method Methods 0.000 claims description 51
- 239000011248 coating agent Substances 0.000 claims description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 238000005406 washing Methods 0.000 claims description 31
- 239000002585 base Substances 0.000 claims description 25
- 239000010419 fine particle Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 20
- 238000000227 grinding Methods 0.000 claims description 18
- 239000010410 layer Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 18
- 241000196324 Embryophyta Species 0.000 claims description 16
- 239000004033 plastic Substances 0.000 claims description 16
- 241000218631 Coniferophyta Species 0.000 claims description 13
- 239000003513 alkali Substances 0.000 claims description 12
- 238000000889 atomisation Methods 0.000 claims description 12
- 239000012159 carrier gas Substances 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 12
- 239000003242 anti bacterial agent Substances 0.000 claims description 9
- 239000002216 antistatic agent Substances 0.000 claims description 9
- 238000004537 pulping Methods 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000007865 diluting Methods 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 230000003311 flocculating effect Effects 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 5
- 230000003068 static effect Effects 0.000 abstract description 5
- 230000035807 sensation Effects 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000001341 hydroxy propyl starch Substances 0.000 description 1
- 235000013828 hydroxypropyl starch Nutrition 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003075 superhydrophobic effect Effects 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
-
- 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
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/14—Secondary fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/22—Polyalkenes, e.g. polystyrene
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
-
- 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
- D21H21/00—Non-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
- D21H21/14—Non-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 characterised by function or properties in or on the paper
-
- 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
- D21H21/00—Non-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
- D21H21/14—Non-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 characterised by function or properties in or on the paper
- D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- General Chemical & Material Sciences (AREA)
- Paper (AREA)
Abstract
The invention discloses an environment-friendly antistatic antibacterial waterproof kraft paper and a production process thereof, which relate to the technical field of kraft paper production, and the kraft paper and the production process thereof aim to solve the technical problems that the kraft paper does not have antistatic performance, the surface of the kraft paper is easy to adsorb and separate impurities, paper is easy to attract and adhere together, the kraft paper is prepared from plant fibers, and the environment friendliness is poor; the PE coating layer, the antibacterial coating layer and the antistatic coating layer are sequentially arranged at the upper end and the lower end of the base paper, the design of the antistatic coating layer is utilized by the kraft paper and the production process of the kraft paper, so that the kraft paper has antistatic performance, the surface of the kraft paper is not easy to adsorb and separate into impurities, the cleanness of the surface of the kraft paper is ensured, the kraft paper can not be attracted and attached together, the needling sensation caused by static electricity is prevented, the kraft paper is prepared by needle trees, broadleaf plants and waste paper, and the waste paper is recycled, so that the kraft paper is more environment-friendly.
Description
Technical Field
The invention belongs to the technical field of kraft paper production, and particularly relates to an environment-friendly antistatic antibacterial waterproof kraft paper and a production process thereof.
Background
The stretch-proofing advantage of cow hide card paper makes its demand that is fit for packing very much, consequently cow hide card paper is widely used in the packing trade, along with the promotion of people's environmental awareness's enhancement and limit plastic command, the packaging product of cow hide card paper preparation is widely used.
At present, the invention patent with the patent number of CN202010359312.7 discloses a preparation method of antibacterial kraft paper with super-hydrophobic surface, which comprises the following steps: (1) preparing clean, dry and flat kraft paper for use; (2) Preparing a coating solution, dissolving titanate, rosin modified alkyd resin and hydroxypropyl starch in absolute ethyl alcohol, and uniformly stirring; (3) Uniformly coating the coating solution prepared in the step (2) on the surface of kraft paper, standing for a period of time, volatilizing part of solvent ethanol, spraying deionized water on the surface of the kraft paper coated with the coating solution, carrying out surface in-situ hydrolysis, and drying after the hydrolysis reaction is complete, wherein the kraft paper is prepared by using titanate in-situ hydrolysis to prevent bacteria from breeding on the surface of the kraft paper, but the kraft paper does not have antistatic performance, the surface of the kraft paper is easily adsorbed and separated into impurities under the influence of static electricity, the paper is easily attracted and attached together, the static electricity can enable a human body to have electric shock acupuncture feeling, the kraft paper is prepared by using plant fibers, the forest can be damaged, and the environmental protection performance is poor.
Therefore, in order to solve the above problems of no antistatic effect and poor environmental protection, it is needed to improve the usage scene of kraft paper.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an environment-friendly antistatic antibacterial waterproof kraft paper and a production process thereof, and the kraft paper and the production process thereof aim to solve the technical problems that the kraft paper does not have antistatic performance in the prior art, the kraft paper surface is easily adsorbed and separated into impurities, the paper is easily attracted and attached together, the kraft paper is prepared from plant fibers, and the environment friendliness is poor.
In order to solve the technical problems, the invention provides an environment-friendly antistatic antibacterial waterproof kraft paper, which comprises base paper; the PE laminating layer, the antibacterial coating and the antistatic coating are sequentially arranged at the upper end and the lower end of the base paper.
Further, the PE coating layer is made of PE plastic particles, and the thickness of the PE coating layer is 0.02-0.03 mm.
Further, the thickness of the antibacterial coating is 1-10 mu m, and the raw material of the antibacterial coating is an antibacterial agent.
Further, the thickness of the antistatic coating is 1-10 mu m, and the raw material of the antistatic coating is an antistatic agent.
The production process of the environment-friendly antistatic antibacterial waterproof kraft paper comprises the environment-friendly antistatic antibacterial waterproof kraft paper, which comprises the following steps:
step one: adding conifer, broadleaf plants and waste paper into a digester, adding clear water and alkali into the digester, stirring the materials by a stirrer, introducing steam, heating to 140 ℃ for the first time, heating to 160 ℃ for the second time, stopping steam inlet, entering a heat preservation stage, entering the digester from the lower part by using washing filtrate, displacing liquid in the digester from the upper part, diluting slurry in the digester by using washing filtrate after displacement, and pumping the slurry into a jet cooker;
step two: setting technological condition parameters of pulp washing, pumping diluted pulp into a drum groove of a pressure pulp washer, filtering under the action of liquid level difference and wind pressure inside and outside a rotary drum when the pulp level rises to be above the lowest point of the rotary drum to form a pulp layer, thickening the pulp layer on the drum surface, spraying and washing, stripping pulp by utilizing a scraper and wind pressure in the rotary drum, scattering and absorbing in a discharge groove, and delivering the pulp into a pulp pool for storage;
step three: feeding the slurry into a vibrating frame sieve, removing large particles, undissolved lumps, coarse fibers and other impurities in the slurry under the action of a screen mesh in the vibrating frame sieve, feeding the sieved slurry into a mesh tank of a cylinder mould thickener, removing water from the dilute concentration slurry through a copper mesh under the action of rotation of the cylinder mould and water level difference inside and outside the cylinder mould to obtain high concentration slurry, and scraping the slurry by a scraper on a mesh surface slurry belt by a pressing shaft of the mesh cage;
step four: the high-concentration slurry enters the center of a grinding area of a double-disc pulping machine from two slurry inlet pipes, passes through the grinding area under the action of centrifugal force and slurry inlet pressure, is kneaded and extruded by a fluted disc in the grinding area to finish pulping, and then passes through a rotor sieve to remove fiber clusters and other fiber impurities;
step five: the pulp distributor of the head box uniformly distributes the net-feeding paper material flow along the width direction of the paper machine, the rectifying element and the turbulence generator of the head box generate turbulence to effectively disperse the fibers, prevent the fibers from flocculating, keep the non-directional arrangement of the fibers, ensure that the fibers in the net-feeding paper material flow are in a uniform dispersion state, press and take away part of the water squeezed by the squeezing part of the paper machine, and dehydrate the formed wet paper sheet;
step six: the paper machine drying part is used for drying paper sheets, the drying part consists of a plurality of groups of drying cylinders, and finally, a calender is used for flattening and conforming the paper sheets to obtain base paper;
step seven: after PE plastic particles are hot melted, the PE plastic particles are extruded in a linear mode through a die opening of a flat die after being plasticized by a screw, are attached to the surface of base paper after being stretched, form a PE coating layer after being cooled and shaped, and are coated on the other surface of the base paper in the same way;
step eight: atomizing the antibacterial agent into fine particles through an ultrasonic atomization device, uniformly coating the fine particles on the surface of the PE coating layer through carrier gas, so as to form an antibacterial coating, and performing antibacterial treatment on the other PE coating layer in the same way;
step nine: the antistatic agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the antibacterial coating through carrier gas, so that an antistatic coating is formed, and the other surface of the antibacterial coating is subjected to antistatic treatment in the same way, so that a finished product is obtained.
Further, in the first step, the mass ratio of conifer, broadleaf plant and waste paper is 3:2:1, the alkali amount is 16-18% of the total amount of the raw materials.
Further, in the first step, the proportion of clear water to raw materials is 2.65-2.85:1, the primary heating time is 60min, the secondary heating time is 40min, and the heat preservation time is 1.5-3 hours.
Further, the parameters of the pulp washing process set in the second step are as follows: the air pressure in the drum tank is 5-11kPa, the air pressure in the drum is 0-0.3kPa, and the temperature of the washing water is 80-85 ℃.
Further, the concentration of the slurry in the fourth step is 2-5%.
Further, the line pressure of the press section of the paper machine in the fifth step is 20-60kN/m.
Compared with the prior art, the invention has the beneficial effects that:
the kraft paper and the production process thereof utilize the design of the antistatic coating, so that the kraft paper has antistatic performance, the influence caused by static electricity is reduced, the surface of the kraft paper is not easy to adsorb and separate into impurities, the surface of the kraft paper is clean, the kraft paper cannot be attracted and attached together, the needling sensation caused by static electricity is prevented, the kraft paper is prepared from conifer, broadleaf plants and waste paper, the waste paper is recycled, the consumption of plants is reduced, the destructiveness to forests is reduced, and the production process is more environment-friendly.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the kraft liner board of the invention;
FIG. 2 is a process flow diagram of one embodiment of the kraft liner board production process of the invention.
In the figure: 1. base paper; 2. PE coating film layer; 3. an antimicrobial coating; 4. an antistatic coating.
Detailed Description
The specific embodiment is an environment-friendly antistatic antibacterial waterproof kraft paper and a production process thereof, wherein a schematic three-dimensional structure is shown in fig. 1, a process flow chart is shown in fig. 2, and the kraft paper comprises base paper 1; the PE laminated layer 2, the antibacterial coating 3 and the antistatic coating 4 are sequentially arranged at the upper end and the lower end of the base paper 1.
Further, the PE coating layer 2 is made of PE plastic particles, and the thickness of the PE coating layer 2 is 0.02-0.03 mm.
Further, the thickness of the antibacterial coating 3 is 1-10 μm, and the raw material of the antibacterial coating 3 is antibacterial agent.
Further, the thickness of the antistatic coating 4 is 1 μm to 10 μm, and the raw material of the antistatic coating 4 is an antistatic agent.
The production process of the environment-friendly antistatic antibacterial waterproof kraft paper comprises the environment-friendly antistatic antibacterial waterproof kraft paper, which comprises the following steps:
step one: adding conifer, broadleaf plants and waste paper into a digester, adding clear water and alkali into the digester, stirring the materials by a stirrer, introducing steam, heating to 140 ℃ for the first time, heating to 160 ℃ for the second time, stopping steam inlet, entering a heat preservation stage, entering the digester from the lower part by using washing filtrate, displacing liquid in the digester from the upper part, diluting slurry in the digester by using washing filtrate after displacement, and pumping the slurry into a jet cooker;
step two: setting technological condition parameters of pulp washing, pumping diluted pulp into a drum groove of a pressure pulp washer, filtering under the action of liquid level difference and wind pressure inside and outside a rotary drum when the pulp level rises to be above the lowest point of the rotary drum to form a pulp layer, thickening the pulp layer on the drum surface, spraying and washing, stripping pulp by utilizing a scraper and wind pressure in the rotary drum, scattering and absorbing in a discharge groove, and delivering the pulp into a pulp pool for storage;
step three: feeding the slurry into a vibrating frame sieve, removing large particles, undissolved lumps, coarse fibers and other impurities in the slurry under the action of a screen mesh in the vibrating frame sieve, feeding the sieved slurry into a mesh tank of a cylinder mould thickener, removing water from the dilute concentration slurry through a copper mesh under the action of rotation of the cylinder mould and water level difference inside and outside the cylinder mould to obtain high concentration slurry, and scraping the slurry by a scraper on a mesh surface slurry belt by a pressing shaft of the mesh cage;
step four: the high-concentration slurry enters the center of a grinding area of a double-disc pulping machine from two slurry inlet pipes, passes through the grinding area under the action of centrifugal force and slurry inlet pressure, is kneaded and extruded by a fluted disc in the grinding area to finish pulping, and then passes through a rotor sieve to remove fiber clusters and other fiber impurities;
step five: the pulp distributor of the head box uniformly distributes the net-feeding paper material flow along the width direction of the paper machine, the rectifying element and the turbulence generator of the head box generate turbulence to effectively disperse the fibers, prevent the fibers from flocculating, keep the non-directional arrangement of the fibers, ensure that the fibers in the net-feeding paper material flow are in a uniform dispersion state, press and take away part of the water squeezed by the squeezing part of the paper machine, and dehydrate the formed wet paper sheet;
step six: the paper machine drying part dries the paper, the drying part is composed of a plurality of groups of drying cylinders, and finally, a calender makes the paper surface smooth and consistent to obtain base paper 1;
step seven: after PE plastic particles are hot melted, the PE plastic particles are extruded in a linear mode through a die opening of a flat die after being plasticized by a screw, are attached to the surface of base paper 1 after being stretched, form PE coating layer 2 after being cooled and shaped, and similarly coat the other surface of the base paper 1;
step eight: the antibacterial agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the PE coating layer 2 through carrier gas, so that an antibacterial coating 3 is formed, and the other PE coating layer 2 is subjected to antibacterial treatment in the same way;
step nine: the antistatic agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the antibacterial coating 3 through carrier gas, so that an antistatic coating 4 is formed, and the other surface of the antibacterial coating 3 is subjected to antistatic treatment in the same way, so that a finished product is obtained.
Further, in the first step, the mass ratio of conifer, broadleaf plant and waste paper is 3:2:1, the alkali amount is 16-18% of the total amount of the raw materials.
Further, in the first step, the proportion of clear water to raw materials is 2.65-2.85:1, the primary heating time is 60min, the secondary heating time is 40min, and the heat preservation time is 1.5-3 hours.
Further, the parameters of the pulp washing process set in the second step are as follows: the air pressure in the drum tank is 5-11kPa, the air pressure in the drum is 0-0.3kPa, and the temperature of the washing water is 80-85 ℃.
Further, the concentration of the slurry in the fourth step is 2-5%.
Further, the line pressure of the press section of the paper machine in the fifth step is 20-60kN/m.
Example 1
When the kraft paper of the technical proposal is produced, the following steps are adopted:
step one: adding conifer, broadleaf plants and waste paper into a digester, adding clear water and alkali into the digester, stirring the materials by a stirrer, introducing steam, heating to 140 ℃ for the first time, heating to 160 ℃ for the second time, stopping steam inlet, entering a heat preservation stage, using washing filtrate to enter from the lower part of the digester, replacing liquid in the digester from the upper part, diluting slurry in the digester by using the washing filtrate after replacement, and pumping into a spraying pot, wherein the mass ratio of the conifer, the broadleaf plants and the waste paper is 3:2:1, the alkali amount is 16% of the total amount of the raw materials, and the proportion of clear water to the raw materials is 2.65:1, the primary heating time is 60min, the secondary heating time is 40min, and the heat preservation time is 1.5 hours;
step two: the set pulp washing technological condition parameters are as follows: the air pressure in the drum tank is 5kPa, the temperature of washing water is 0kPa in the drum, diluted slurry is pumped into the drum tank of the pressure pulp washer, when the slurry level rises above the lowest point of the drum, the slurry is filtered under the action of the liquid level difference and the air pressure inside and outside the drum to form a slurry layer, the slurry layer on the drum surface is thickened, then sprayed and washed, the slurry is peeled by utilizing the air pressure in the scraper and the drum, scattered and absorbed in the discharge tank, and the slurry is sent into a slurry tank for storage;
step three: feeding the slurry into a vibrating frame sieve, removing large particles, undissolved lumps, coarse fibers and other impurities in the slurry under the action of a screen mesh in the vibrating frame sieve, feeding the sieved slurry into a mesh tank of a cylinder mould thickener, removing water from the dilute concentration slurry through a copper mesh under the action of rotation of the cylinder mould and water level difference inside and outside the cylinder mould to obtain high concentration slurry, and scraping the slurry by a scraper on a mesh surface slurry belt by a pressing shaft of the mesh cage;
step four: the high-concentration slurry enters the center of a grinding area of a double-disc pulping machine from two slurry inlet pipes, the concentration of the slurry is 2%, the slurry passes through the grinding area under the action of centrifugal force and slurry inlet pressure, the slurry is pulped through kneading and extrusion of a fluted disc in the grinding area, and then fiber clusters and other fiber impurities are removed through a rotor sieve;
step five: the pulp distributor of the head box uniformly distributes the net-feeding paper material flow along the width direction of the paper machine, the rectifying element and the turbulence generator of the head box generate turbulence to effectively disperse the fibers, prevent the fibers from flocculating and keep the unoriented arrangement of the fibers, so that the fibers in the net-feeding paper material flow are in a uniform dispersion state, the press part of the paper machine is pressurized and takes away part of the water squeezed by the press, the wet paper sheet after being formed is dehydrated, and the line pressure of the press part of the paper machine is 20kN/m;
step six: the paper machine drying part dries the paper, the drying part is composed of a plurality of groups of drying cylinders, and finally, a calender makes the paper surface smooth and consistent to obtain base paper 1;
step seven: after PE plastic particles are hot melted, the PE plastic particles are extruded in a linear mode through a die opening of a flat die after being plasticized by a screw, are attached to the surface of base paper 1 after being stretched, form PE coating layer 2 after being cooled and shaped, and similarly coat the other surface of the base paper 1;
step eight: the antibacterial agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the PE coating layer 2 through carrier gas, so that an antibacterial coating 3 is formed, and the other PE coating layer 2 is subjected to antibacterial treatment in the same way;
step nine: the antistatic agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the antibacterial coating 3 through carrier gas, so that an antistatic coating 4 is formed, and the other surface of the antibacterial coating 3 is subjected to antistatic treatment in the same way, so that a finished product is obtained.
Example 2
When the kraft paper of the technical proposal is produced, the following steps are adopted:
step one: adding conifer, broadleaf plants and waste paper into a digester, adding clear water and alkali into the digester, stirring the materials by a stirrer, introducing steam, heating to 140 ℃ for the first time, heating to 160 ℃ for the second time, stopping steam inlet, entering a heat preservation stage, using washing filtrate to enter from the lower part of the digester, replacing liquid in the digester from the upper part, diluting slurry in the digester by using the washing filtrate after replacement, and pumping into a spraying pot, wherein the mass ratio of the conifer, the broadleaf plants and the waste paper is 3:2:1, using alkali as 18% of the total amount of the raw materials, and the proportion of clear water to the raw materials is 2.85:1, the primary heating time is 60min, the secondary heating time is 40min, and the heat preservation time is 3 hours;
step two: the set pulp washing technological condition parameters are as follows: the air pressure in the drum tank is 11kPa, the temperature of washing water is 85 ℃, diluted slurry is pumped into the drum tank of the pressure pulp washer, when the slurry level rises above the lowest point of the drum, the slurry is filtered under the action of the liquid level difference and the air pressure inside and outside the drum to form a slurry layer, the slurry layer on the drum surface is thickened, then spray washing is carried out, the slurry is peeled by utilizing the scraper and the air pressure in the drum, scattered and absorbed in a discharge chute, and the slurry is sent into a slurry tank for storage;
step three: feeding the slurry into a vibrating frame sieve, removing large particles, undissolved lumps, coarse fibers and other impurities in the slurry under the action of a screen mesh in the vibrating frame sieve, feeding the sieved slurry into a mesh tank of a cylinder mould thickener, removing water from the dilute concentration slurry through a copper mesh under the action of rotation of the cylinder mould and water level difference inside and outside the cylinder mould to obtain high concentration slurry, and scraping the slurry by a scraper on a mesh surface slurry belt by a pressing shaft of the mesh cage;
step four: the high-concentration slurry enters the center of a grinding area of a double-disc pulping machine from two slurry inlet pipes, the concentration of the slurry is 5%, the slurry passes through the grinding area under the action of centrifugal force and slurry inlet pressure, the slurry is pulped through kneading and extrusion of a fluted disc in the grinding area, and then fiber clusters and other fiber impurities are removed through a rotor sieve;
step five: the pulp distributor of the head box uniformly distributes the net-feeding paper material flow along the width direction of the paper machine, the rectifying element and the turbulence generator of the head box generate turbulence to effectively disperse the fibers, prevent the fibers from flocculating and keep the unoriented arrangement of the fibers, so that the fibers in the net-feeding paper material flow are in a uniform dispersion state, the press part of the paper machine is pressurized and takes away part of the water squeezed by the press, the wet paper sheet after being formed is dehydrated, and the line pressure of the press part of the paper machine is 60kN/m;
step six: the paper machine drying part dries the paper, the drying part is composed of a plurality of groups of drying cylinders, and finally, a calender makes the paper surface smooth and consistent to obtain base paper 1;
step seven: after PE plastic particles are hot melted, the PE plastic particles are extruded in a linear mode through a die opening of a flat die after being plasticized by a screw, are attached to the surface of base paper 1 after being stretched, form PE coating layer 2 after being cooled and shaped, and similarly coat the other surface of the base paper 1;
step eight: the antibacterial agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the PE coating layer 2 through carrier gas, so that an antibacterial coating 3 is formed, and the other PE coating layer 2 is subjected to antibacterial treatment in the same way;
step nine: the antistatic agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the antibacterial coating 3 through carrier gas, so that an antistatic coating 4 is formed, and the other surface of the antibacterial coating 3 is subjected to antistatic treatment in the same way, so that a finished product is obtained.
Example 3
When the kraft paper of the technical proposal is produced, the following steps are adopted:
step one: adding conifer, broadleaf plants and waste paper into a digester, adding clear water and alkali into the digester, stirring the materials by a stirrer, introducing steam, heating to 140 ℃ for the first time, heating to 160 ℃ for the second time, stopping steam inlet, entering a heat preservation stage, using washing filtrate to enter from the lower part of the digester, replacing liquid in the digester from the upper part, diluting slurry in the digester by using the washing filtrate after replacement, and pumping into a spraying pot, wherein the mass ratio of the conifer, the broadleaf plants and the waste paper is 3:2:1, the alkali amount is 17% of the total amount of the raw materials, and the proportion of clear water to the raw materials is 2.75:1, the primary heating time is 60min, the secondary heating time is 40min, and the heat preservation time is 2.5 hours;
step two: the set pulp washing technological condition parameters are as follows: the air pressure in the drum tank is 8kPa, the temperature of washing water is 0.15kPa, diluted slurry is pumped into the drum tank of the pressure pulp washer, when the slurry level rises above the lowest point of the drum, the slurry is filtered under the action of the liquid level difference and the air pressure inside and outside the drum to form a slurry layer, the slurry layer on the drum surface is thickened, then sprayed and washed, the slurry is peeled by utilizing the scraper and the air pressure in the drum, scattered and absorbed in a discharge chute, and the slurry is sent into a slurry tank for storage;
step three: feeding the slurry into a vibrating frame sieve, removing large particles, undissolved lumps, coarse fibers and other impurities in the slurry under the action of a screen mesh in the vibrating frame sieve, feeding the sieved slurry into a mesh tank of a cylinder mould thickener, removing water from the dilute concentration slurry through a copper mesh under the action of rotation of the cylinder mould and water level difference inside and outside the cylinder mould to obtain high concentration slurry, and scraping the slurry by a scraper on a mesh surface slurry belt by a pressing shaft of the mesh cage;
step four: the high-concentration slurry enters the center of a grinding area of a double-disc pulping machine from two slurry inlet pipes, the concentration of the slurry is 3 percent, the slurry passes through the grinding area under the action of centrifugal force and slurry inlet pressure, the slurry is pulped through kneading and extrusion of a fluted disc in the grinding area, and then fiber clusters and other fiber impurities are removed through a rotor sieve;
step five: the pulp distributor of the head box uniformly distributes the net-feeding paper material flow along the width direction of the paper machine, the rectifying element and the turbulence generator of the head box generate turbulence to effectively disperse the fibers, prevent the fibers from flocculating and keep the unoriented arrangement of the fibers, so that the fibers in the net-feeding paper material flow are in a uniform dispersion state, the press part of the paper machine is pressurized and takes away part of the water squeezed by the press, the wet paper sheet after being formed is dehydrated, and the line pressure of the press part of the paper machine is 40kN/m;
step six: the paper machine drying part dries the paper, the drying part is composed of a plurality of groups of drying cylinders, and finally, a calender makes the paper surface smooth and consistent to obtain base paper 1;
step seven: after PE plastic particles are hot melted, the PE plastic particles are extruded in a linear mode through a die opening of a flat die after being plasticized by a screw, are attached to the surface of base paper 1 after being stretched, form PE coating layer 2 after being cooled and shaped, and similarly coat the other surface of the base paper 1;
step eight: the antibacterial agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the PE coating layer 2 through carrier gas, so that an antibacterial coating 3 is formed, and the other PE coating layer 2 is subjected to antibacterial treatment in the same way;
step nine: the antistatic agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the antibacterial coating 3 through carrier gas, so that an antistatic coating 4 is formed, and the other surface of the antibacterial coating 3 is subjected to antistatic treatment in the same way, so that a finished product is obtained.
Table 1 shows the performance index of kraft paper produced in example 1, example 2 and example 3.
Table 1.
Claims (10)
1. An environment-friendly antistatic antibacterial waterproof kraft paper comprises base paper (1); the PE coated paper is characterized in that PE coated layers (2), antibacterial coatings (3) and antistatic coatings (4) are sequentially arranged at the upper end and the lower end of the base paper (1).
2. The environment-friendly antistatic antibacterial kraft paper of claim 1, wherein the PE coated layer (2) is made of PE plastic particles, and the PE coated layer (2) has a thickness of 0.02-0.03 mm.
3. The environment-friendly antistatic antibacterial kraft paper of claim 1, wherein the thickness of the antibacterial coating (3) is 1-10 μm, and the raw material of the antibacterial coating (3) is an antibacterial agent.
4. The environment-friendly antistatic antibacterial kraft paper of claim 1, wherein the thickness of the antistatic coating (4) is 1-10 μm, and the raw material of the antistatic coating (4) is an antistatic agent.
5. An environment-friendly antistatic antibacterial water-resistant kraft paper production process, which is characterized by comprising the following steps of:
step one: adding conifer, broadleaf plants and waste paper into a digester, adding clear water and alkali into the digester, stirring the materials by a stirrer, introducing steam, heating to 140 ℃ for the first time, heating to 160 ℃ for the second time, stopping steam inlet, entering a heat preservation stage, entering the digester from the lower part by using washing filtrate, displacing liquid in the digester from the upper part, diluting slurry in the digester by using washing filtrate after displacement, and pumping the slurry into a jet cooker;
step two: setting technological condition parameters of pulp washing, pumping diluted pulp into a drum groove of a pressure pulp washer, filtering under the action of liquid level difference and wind pressure inside and outside a rotary drum when the pulp level rises to be above the lowest point of the rotary drum to form a pulp layer, thickening the pulp layer on the drum surface, spraying and washing, stripping pulp by utilizing a scraper and wind pressure in the rotary drum, scattering and absorbing in a discharge groove, and delivering the pulp into a pulp pool for storage;
step three: feeding the slurry into a vibrating frame sieve, removing large particles, undissolved lumps, coarse fibers and other impurities in the slurry under the action of a screen mesh in the vibrating frame sieve, feeding the sieved slurry into a mesh tank of a cylinder mould thickener, removing water from the dilute concentration slurry through a copper mesh under the action of rotation of the cylinder mould and water level difference inside and outside the cylinder mould to obtain high concentration slurry, and scraping the slurry by a scraper on a mesh surface slurry belt by a pressing shaft of the mesh cage;
step four: the high-concentration slurry enters the center of a grinding area of a double-disc pulping machine from two slurry inlet pipes, passes through the grinding area under the action of centrifugal force and slurry inlet pressure, is kneaded and extruded by a fluted disc in the grinding area to finish pulping, and then passes through a rotor sieve to remove fiber clusters and other fiber impurities;
step five: the pulp distributor of the head box uniformly distributes the net-feeding paper material flow along the width direction of the paper machine, the rectifying element and the turbulence generator of the head box generate turbulence to effectively disperse the fibers, prevent the fibers from flocculating, keep the non-directional arrangement of the fibers, ensure that the fibers in the net-feeding paper material flow are in a uniform dispersion state, press and take away part of the water squeezed by the squeezing part of the paper machine, and dehydrate the formed wet paper sheet;
step six: the paper machine drying part dries the paper sheets, the drying part consists of a plurality of groups of drying cylinders, and finally, a calender makes the paper sheets smooth and consistent to obtain base paper (1);
step seven: after PE plastic particles are hot melted, the PE plastic particles are extruded in a linear mode through a die opening of a flat die after being plasticized by a screw, are attached to the surface of base paper (1) after being stretched, form a PE coating layer (2) after being cooled and shaped, and are coated on the other surface of the base paper (1) in the same way;
step eight: the antibacterial agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the PE coating layer (2) through carrier gas, so that an antibacterial coating (3) is formed, and the other PE coating layer (2) is subjected to antibacterial treatment in the same way;
step nine: the antistatic agent is atomized into fine particles through an ultrasonic atomization device, and then the fine particles are uniformly coated on the surface of the antibacterial coating (3) through carrier gas, so that an antistatic coating (4) is formed, and the other surface of the antibacterial coating (3) is subjected to antistatic treatment in the same way, so that a finished product is obtained.
6. The process for producing the environment-friendly antistatic antibacterial water-tolerant kraft paper according to claim 5, wherein in the first step, the mass ratio of conifer, broadleaf plants and waste paper is 3:2:1, the alkali amount is 16-18% of the total amount of the raw materials.
7. The process for producing the environment-friendly antistatic antibacterial water-tolerant kraft paper according to claim 5, which is characterized in that the ratio of clear water to raw materials in the first step is 2.65-2.85:1, the primary heating time is 60min, the secondary heating time is 40min, and the heat preservation time is 1.5-3 hours.
8. The process for producing the environment-friendly antistatic antibacterial water-tolerant kraft paper according to claim 5, wherein the parameters of the pulp washing process conditions set in the second step are as follows: the air pressure in the drum tank is 5-11kPa, the air pressure in the drum is 0-0.3kPa, and the temperature of the washing water is 80-85 ℃.
9. The process for producing the environment-friendly antistatic antibacterial water-tolerant kraft paper according to claim 5, wherein the concentration of the slurry in the fourth step is 2-5%.
10. The process for producing the environment-friendly antistatic antibacterial water-tolerant kraft paper according to claim 5, wherein the line pressure of the press part of the paper machine in the fifth step is 20-60kN/m.
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