CN112962357A - Automatic production process of paper pulp molding packaging product - Google Patents
Automatic production process of paper pulp molding packaging product Download PDFInfo
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- CN112962357A CN112962357A CN202110149918.2A CN202110149918A CN112962357A CN 112962357 A CN112962357 A CN 112962357A CN 202110149918 A CN202110149918 A CN 202110149918A CN 112962357 A CN112962357 A CN 112962357A
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- automatic production
- pulping
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Links
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 28
- 238000000465 moulding Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 229920001131 Pulp (paper) Polymers 0.000 title claims abstract description 17
- 238000004537 pulping Methods 0.000 claims abstract description 58
- 239000000123 paper Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 20
- 238000007731 hot pressing Methods 0.000 claims abstract description 16
- 238000007493 shaping process Methods 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 12
- 230000001070 adhesive effect Effects 0.000 claims abstract description 12
- 239000002002 slurry Substances 0.000 claims abstract description 12
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 239000002699 waste material Substances 0.000 claims abstract description 9
- 238000010790 dilution Methods 0.000 claims abstract description 7
- 239000012895 dilution Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000011111 cardboard Substances 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims abstract description 3
- 238000005507 spraying Methods 0.000 claims abstract description 3
- 229920002472 Starch Polymers 0.000 claims description 13
- 239000011087 paperboard Substances 0.000 claims description 13
- 239000008107 starch Substances 0.000 claims description 13
- 235000019698 starch Nutrition 0.000 claims description 13
- 239000012744 reinforcing agent Substances 0.000 claims description 10
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 6
- 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 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 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 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000010893 paper waste Substances 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 239000001993 wax Substances 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- 229920002085 Dialdehyde starch Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 35
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 125000002091 cationic group Chemical group 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000007723 die pressing method Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000004816 latex Substances 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 235000010980 cellulose Nutrition 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 244000007853 Sarothamnus scoparius Species 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 206010061592 cardiac fibrillation Diseases 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002600 fibrillogenic effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J5/00—Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/32—Defibrating by other means of waste paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
-
- 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
- D21D1/02—Methods of beating; Beaters of the Hollander 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
- D21H17/29—Starch cationic
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/18—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising waxes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- 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
-
- 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
- D21H21/16—Sizing or water-repelling 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
Abstract
The invention discloses an automatic production process of a paper pulp molding packaging product, which comprises the following steps: s1, pulping: breaking and decomposing waste newspapers and waste cardboard by a pulping machine, adding water for dilution, wherein the concentration of paper pulp is 4-6%, and then adding an adhesive and an auxiliary agent; s2, forming a paper mold blank: moving a forming die with a filter screen into the position below the liquid level of the slurry tank through a forming machine, sucking slurry with certain absolute dry mass onto the forming screen through vacuum suction, and demolding after forming; s3, drying the green body product: drying the paper mould product by a tunnel dryer at the drying temperature of 200 ℃ and 250 ℃ for 15-25 min; s4, hot-pressing shaping: shaping the product by a hot-pressing shaping machine by utilizing a heating mould pressing principle, wherein the temperature of a hot-pressing mould is 150-; s5, moisture-proof treatment: and spraying a moisture-proof glazing agent on the outer surface of the paper molded product. The waterproof coating has the advantages of excellent waterproofness and higher strength.
Description
Technical Field
The invention relates to the technical field of paper pulp molding packaging products, in particular to an automatic production process of a paper pulp molding packaging product.
Background
Pulp molding is made by using pulp as a raw material to prepare pulp or adding water and an auxiliary agent in a proper proportion, and molding the pulp into products with various shapes by using a mold. However, these paper-made packaging products, especially the paper-mold-lined packaging products, have the disadvantages of inferior strength compared with the plastic foam packaging products, and the paper-molded products are liable to absorb moisture and have reduced strength in the marine and humid environments, so that the problems of reinforcement and water and moisture resistance of the paper-made packaging products must be solved.
Disclosure of Invention
The invention aims to provide an automatic production process of a paper pulp molding packaging product, which has the advantages of excellent waterproofness and higher strength, and solves the problems that the strength of the paper packaging product, especially the paper molding lining packaging product is poorer than that of a plastic foaming packaging product, the paper molding product is easy to absorb moisture and is reduced in strength in a marine and humid environment, and therefore, the problems of reinforcement, waterproofness and moisture resistance of the paper packaging product need to be solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic production process of a paper pulp molding packaging product comprises the following steps:
s1, pulping: breaking and decomposing waste newspapers and waste cardboard by a pulping machine, adding water for dilution, and then adding an adhesive and an auxiliary agent;
s2, forming a paper mold blank: moving a forming die with a filter screen into the position below the liquid level of the slurry tank through a forming machine, sucking slurry with certain absolute dry mass onto the forming screen through vacuum suction, and demolding after forming;
s3, drying the green body product: drying the paper mould product by a tunnel dryer;
s4, hot-pressing shaping: shaping the product by a hot-pressing shaper according to the heating mould pressing principle;
s5, moisture-proof treatment: and spraying a moisture-proof glazing agent on the outer surface of the paper molded product.
Preferably, before the beating of the waste paper, the raw material is carefully classified by a hydraulic grinder and a sorter and various impurities are removed.
Preferably, the vacuum degree is 0.5-0.7MPa, and the forming time is 3-8 s.
Preferably, the binder is one or more of rosin, paraffin wax latex or rosin stone latex.
Preferably, the auxiliary agent comprises starch paste and a paperboard water-resistant reinforcing agent, and the paperboard water-resistant reinforcing agent is one or more of polyvinyl alcohol, acrylic acid, celluloses, resins and dialdehyde starch.
Preferably, the moisture resistant polish is made by melting a low molecular weight polyethylene and a wax.
Preferably, the pulp concentration in S1 is 4-6%.
Preferably, the drying temperature in S3 is 200-250 ℃.
Preferably, the drying time in S3 is 15-25 min.
Preferably, the hot stamping temperature in S4 is 150-200 ℃.
Compared with the prior art, the invention has the beneficial effects that: during pulping, a medium-consistency long fiber sticky pulping mode is adopted, wherein medium-consistency pulping is performed in medium-consistency pulping equipment under the condition that the pulping concentration is 4-6%, the long fiber sticky pulping mode is a pulping mode which requires that fibers are prevented from being cut off as far as possible, so that the fibers keep a certain length, and are highly broomed, and the method has good swelling hydration. In medium consistency pulping, the concentration and dilution amplitude is reduced, so that the electric energy can be saved by 20-30kw ht absolute dry pulp;
by using the starch paste, the cationic groups in the starch are attached to the surface of the fiber through electrostatic attraction between negative charges on the surface of the fiber and are adsorbed by the fiber through bridging of hydrogen bonds, so that a network adhesive-bonded whole is formed between the broomed fibers, and the aim of improving the strength of the paper product is fulfilled;
by using the moisture-proof glazing agent, the carton has the properties of rain shielding, water repelling, water resistance and moisture resistance, the water absorption and moisture absorption speed of the carton is delayed, the compressive strength of the carton can be normally exerted, the purpose of powerfully protecting commodities is finally achieved, the gloss of the surface of the carton can be improved, the color is brighter, the artistic effect of pictures is enhanced, the product is more attractive, the surface of the carton can have the characteristics of abrasion resistance, chemical resistance, heat resistance, cold resistance and the like, and the loss of the commodities in the transportation and storage processes is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a technical scheme of an automatic production process of a paper pulp molding packaging product
Example 1:
an automatic production process of a paper pulp molding packaging product comprises the following steps:
s1, pulping: the waste newspaper and old case paper board is broken and decomposed by a pulping machine, and diluted by water, the paper pulp concentration is 4%, then adhesive and auxiliary agent are added, before the waste paper is pulped, the raw materials are carefully classified by a hydraulic grinding mill and a sorting machine and various impurities are removed, the adhesive is rosin, the auxiliary agent comprises starch paste liquid and a paper board water-resistant reinforcing agent, the paper board water-resistant reinforcing agent is polyvinyl alcohol, a medium-concentration long fiber sticky pulping mode is adopted during pulping, the medium-concentration pulping is a pulping mode carried out in medium-concentration pulping equipment under the condition that the pulping concentration is 4-6%, the long fiber sticky pulping mode is a pulping mode which requires that fibers are prevented from being cut as far as possible, the fibers keep certain length, and are highly devillized, the pulping mode has good moistening hydration, the fibers are cut less, the distortion is more, the finished product strength is good, and the broom strength is the same, the pulping degree and the water retention value are low, the dewatering performance is better, the pulping time is shortened, the energy consumption is reduced, the equipment performance is improved, the product cost is reduced, the concentration and dilution range is reduced in medium-concentration pulping, so that 20-30kw ht absolute dry pulp can be saved by electric energy, and by using the starch paste liquid, the electric energy is attached to the fiber surface through the electrostatic attraction between a cationic group in the starch and a negative charge on the fiber surface and is adsorbed with the fiber through a bridging of a hydrogen bond, so that a network adhesive-bonded whole is formed between the broomed fibers, and the aim of improving the strength of the paper product is fulfilled;
s2, forming a paper mold blank: moving a forming die with a filter screen into a position below the liquid level of a slurry tank through a forming machine, adsorbing slurry with certain absolute dry mass onto the forming screen through vacuum suction, and demolding after forming, wherein the vacuum degree is 0.5MPa, and the forming time is 8 s;
s3, drying the green body product: drying the paper mould product by a tunnel dryer at the drying temperature of 250 ℃ for 15 min;
s4, hot-pressing shaping: shaping the product by a hot-pressing shaping machine by utilizing a heating die pressing principle, wherein the temperature of a hot-pressing die is 200 ℃;
s5, moisture-proof treatment: the outer surface of the paper mould product is sprayed with the moisture-proof glazing agent which is prepared by melting low molecular polyethylene and wax, and the moisture-proof glazing agent is used, so that the carton has rain-shielding, hydrophobic, water-resistant and moisture-proof properties, the water absorption and moisture absorption speed of the carton is delayed, the compressive strength of the carton can be normally exerted, the purpose of powerfully protecting commodities is finally achieved, the gloss of the surface of the carton can be improved, the color is brighter, the artistic effect of pictures is enhanced, the product is more attractive, the surface of the carton can have abrasion resistance, chemical resistance, heat resistance, cold resistance and the like, and the loss of the commodities in the transportation and storage processes is reduced.
Example 2:
an automatic production process of a paper pulp molding packaging product comprises the following steps:
s1, pulping: the waste newspaper and old case paper board is broken and decomposed by a pulping machine, and diluted by water, the paper pulp concentration is 5%, then adhesive and auxiliary agent are added, before the waste paper is pulped, the raw materials are carefully classified by a hydraulic grinding mill and a sorting machine and various impurities are removed, the adhesive is paraffin emulsion, the auxiliary agent comprises starch paste and a paper board water-resistant reinforcing agent, the paper board water-resistant reinforcing agent is acrylic acid, a medium-concentration long fiber sticky pulping mode is adopted during pulping, the medium-concentration pulping is a pulping mode carried out in medium-concentration pulping equipment under the condition that the pulping concentration is 4-6%, the long fiber sticky pulping mode is a pulping mode which requires that fibers are prevented from being cut as far as possible, the fibers keep a certain length, and high devillicate pulping is carried out, the pulping mode has good moistening hydration, the fibers are cut less, the twisting deformation is more, and the strength of the finished product is good, when the strength of the paper product is the same, the pulping degree and the water retention value are low, the dewatering performance is good, the pulping time is shortened, the energy consumption is reduced, the equipment performance is improved, the product cost is reduced, the electric energy can be saved by 20-30kw ht absolute dry pulp due to the medium-concentration pulping because the concentration and dilution amplitude is reduced, and the fibrillating fibers form a network adhesive whole body by using the starch paste liquid and attaching to the fiber surface through the electrostatic attraction between the cationic group in the starch and the negative charge on the fiber surface and through the bridging adsorption of a hydrogen bond with the fibers, thereby achieving the purpose of improving the strength of the paper product;
s2, forming a paper mold blank: moving a forming die with a filter screen into a position below the liquid level of a slurry tank through a forming machine, adsorbing slurry with certain absolute dry mass onto the forming screen through vacuum suction, and demolding after forming, wherein the vacuum degree is 0.6MPa, and the forming time is 5 s;
s3, drying the green body product: drying the paper mould product by a tunnel dryer at the drying temperature of 200 ℃ for 25 min;
s4, hot-pressing shaping: shaping the product by a hot-pressing shaping machine by utilizing a heating die pressing principle, wherein the temperature of a hot-pressing die is 200 ℃;
s5, moisture-proof treatment: the outer surface of the paper mould product is sprayed with the moisture-proof glazing agent which is prepared by melting low molecular polyethylene and wax, and the moisture-proof glazing agent is used, so that the carton has rain-shielding, hydrophobic, water-resistant and moisture-proof properties, the water absorption and moisture absorption speed of the carton is delayed, the compressive strength of the carton can be normally exerted, the purpose of powerfully protecting commodities is finally achieved, the gloss of the surface of the carton can be improved, the color is brighter, the artistic effect of pictures is enhanced, the product is more attractive, the surface of the carton can have abrasion resistance, chemical resistance, heat resistance, cold resistance and the like, and the loss of the commodities in the transportation and storage processes is reduced.
Example 3:
an automatic production process of a paper pulp molding packaging product comprises the following steps:
s1, pulping: the waste newspaper and old case paper board is broken and decomposed by a pulping machine, and diluted by water, the paper pulp concentration is 6%, then adhesive and auxiliary agent are added, before the waste paper is pulped, the raw materials are carefully classified by a hydraulic grinding mill and a sorting machine and various impurities are removed, the adhesive is rosin stone latex, the auxiliary agent comprises starch paste and a paper board water-resistant reinforcing agent, the paper board water-resistant reinforcing agent is cellulose, a medium-concentration long fiber sticky pulping mode is adopted during pulping, the medium-concentration pulping is a pulping mode carried out in medium-concentration pulping equipment under the condition that the pulping concentration is 4-6%, the long fiber sticky pulping mode is a pulping mode which requires that the fiber is prevented from being cut as far as possible, the fiber keeps a certain length, and high devillicate fibrillation is carried out, the pulping mode has good moistening hydration, the fiber cutting is less, the distortion is more, and the finished product strength is good, when the strength of the paper product is the same, the pulping degree and the water retention value are low, the dewatering performance is good, the pulping time is shortened, the energy consumption is reduced, the equipment performance is improved, the product cost is reduced, the electric energy can be saved by 20-30kw ht absolute dry pulp due to the medium-concentration pulping because the concentration and dilution amplitude is reduced, and the fibrillating fibers form a network adhesive whole body by using the starch paste liquid and attaching to the fiber surface through the electrostatic attraction between the cationic group in the starch and the negative charge on the fiber surface and through the bridging adsorption of a hydrogen bond with the fibers, thereby achieving the purpose of improving the strength of the paper product;
s2, forming a paper mold blank: moving a forming die with a filter screen into a position below the liquid level of a slurry tank through a forming machine, adsorbing slurry with certain absolute dry mass onto the forming screen through vacuum suction, and demolding after forming, wherein the vacuum degree is 0.7MPa, and the forming time is 3 s;
s3, drying the green body product: drying the paper mould product by a tunnel dryer at the drying temperature of 250 ℃ for 20 min;
s4, hot-pressing shaping: shaping the product by a hot-pressing shaping machine by utilizing a heating die pressing principle, wherein the temperature of a hot-pressing die is 200 ℃;
s5, moisture-proof treatment: the outer surface of the paper mould product is sprayed with the moisture-proof glazing agent which is prepared by melting low molecular polyethylene and wax, and the moisture-proof glazing agent is used, so that the carton has rain-shielding, hydrophobic, water-resistant and moisture-proof properties, the water absorption and moisture absorption speed of the carton is delayed, the compressive strength of the carton can be normally exerted, the purpose of powerfully protecting commodities is finally achieved, the gloss of the surface of the carton can be improved, the color is brighter, the artistic effect of pictures is enhanced, the product is more attractive, the surface of the carton can have abrasion resistance, chemical resistance, heat resistance, cold resistance and the like, and the loss of the commodities in the transportation and storage processes is reduced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. An automatic production process of a paper pulp molding packaging product is characterized by comprising the following steps:
s1, pulping: breaking and decomposing waste newspapers and waste cardboard by a pulping machine, adding water for dilution, and then adding an adhesive and an auxiliary agent, wherein the concentration of the paper pulp is 4-6%;
s2, forming a paper mold blank: moving a forming die with a filter screen into the position below the liquid level of the slurry tank through a forming machine, sucking slurry with certain absolute dry mass onto the forming screen through vacuum suction, and demolding after forming;
s3, drying the green body product: drying the paper mould product by a tunnel dryer;
s4, hot-pressing shaping: shaping the product by a hot-pressing shaper according to the heating mould pressing principle;
s5, moisture-proof treatment: and spraying a moisture-proof glazing agent on the outer surface of the paper molded product.
2. The automatic production process of the pulp molding packaging product according to claim 1, characterized in that: before pulping the waste paper, the raw materials are carefully classified by a hydraulic grinder and a sorting machine and various impurities are removed.
3. The automatic production process of the pulp molding packaging product according to claim 1, characterized in that: the vacuum degree is 0.5-0.7MPa, and the forming time is 3-8 s.
4. The automatic production process of the pulp molding packaging product according to claim 1, characterized in that: the adhesive is one or more of rosin, paraffin emulsion or rosin stone emulsion.
5. The automatic production process of the pulp molding packaging product according to claim 1, characterized in that: the assistant comprises starch paste and a paperboard water-resistant reinforcing agent, wherein the paperboard water-resistant reinforcing agent is one or more of polyvinyl alcohol, acrylic acid, cellulose, resin and dialdehyde starch.
6. The automatic production process of the pulp molding packaging product according to claim 1, characterized in that: the moisture-proof glazing agent is prepared by melting low molecular polyethylene and wax.
7. The automatic production process of the pulp molding packaging product according to claim 1, characterized in that: the drying temperature in S3 is 200-250 ℃.
8. The automatic production process of the pulp molding packaging product according to claim 1, characterized in that: and in S3, the drying time is 15-25 min.
9. The automatic production process of the pulp molding packaging product according to claim 1, characterized in that: the hot stamping temperature in S4 was 150 ℃ and 200 ℃.
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