CN109183487B - Method for making salt packaging paper - Google Patents
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- CN109183487B CN109183487B CN201810897842.XA CN201810897842A CN109183487B CN 109183487 B CN109183487 B CN 109183487B CN 201810897842 A CN201810897842 A CN 201810897842A CN 109183487 B CN109183487 B CN 109183487B
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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
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
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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
- D21D1/22—Jordans
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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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
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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
- 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
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/62—Rosin; Derivatives thereof
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
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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
- 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
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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
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
- D21H19/824—Paper comprising more than one coating superposed two superposed coatings, both being non-pigmented
-
- 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
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
-
- 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
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
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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
- 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
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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
- 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
- D21H21/50—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 form
- D21H21/52—Additives of definite length or shape
- D21H21/54—Additives of definite length or shape being spherical, e.g. microcapsules, beads
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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
- D21H27/10—Packing paper
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
The invention discloses a method for manufacturing salt packaging paper, which comprises the steps of firstly mixing coniferous wood chips and broadleaf wood chips and then pulping, adopting a conical mill pulping process, adding auxiliary materials, papermaking with wet paper, pre-drying, surface sizing, post-drying, press polishing and finishing. The manufacturing method of the salt packaging paper has the advantages of good strength, high bursting resistance, good moisture resistance, rapid degradation, and capability of meeting the requirements of environmental protection and food packaging paper sanitation.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a manufacturing method of salt packaging paper.
Background
The common salt packaging bags on the market at present mainly and widely adopt plastic or paper-plastic composite packaging, and because the plastic is extremely difficult to naturally degrade, serious environmental pollution is caused, and some developed countries partially limit the use of the plastic packaging. The foreign salt package is widely made of paper, and the development of salt packaging paper is used for reducing white pollution, so that the method is a great trend and a good matter benefiting the nation and the people.
The requirements of the salt packaging paper products meet the hygienic requirements of paper for food packaging, and the salt packaging paper has the advantages of good strength, high bursting resistance, good moisture resistance, rapid degradation and environmental protection.
Disclosure of Invention
The invention aims to provide a method for manufacturing salt packaging paper, which has the advantages of high strength, high bursting resistance, good moisture resistance, quick degradation and capability of meeting the requirements of environmental protection and food packaging paper sanitation.
In order to realize the purpose, the invention adopts the technical scheme that: the production process of salt packing paper includes the steps of mixing needle leaf and broad leaf wood chip, pulping, compounding pulp and adding supplementary material, making wet paper, pre-drying, surface sizing, post-drying, press polishing and finishing, and features that:
(1) pulping, wherein the pulp is prepared from 40-50% of broad and miscellaneous wood chips in percentage by weight before mixing: 50-60% of coastal pine wood chips;
(2) pulping, namely adopting a conical grinding process, wherein the pulping degree of mixed pulp is as follows: SR at 26-30 ℃ and wet weight of 7-9 g;
(3) adding auxiliary materials, wherein the dosage of the auxiliary materials to the oven-dried pulp is as follows: (a) the weight ratio of the rosin size is 0.5-1.0%; (b) the weight ratio of the retention aid is 0.02-0.04%; (c) the weight ratio of the cationic starch is 0.8-1.0 percent (d), the filler is talcum powder, and the adding amount is controlled according to 10 percent.
(4) Applying surface glue: surface sizing adopts membrane transfer surface sizing, and the surface sizing is formed by mixing a moisture-proof agent, polyvinyl alcohol and sizing starch;
(5) calendering conditions are as follows: and (4) closing the calender, slightly pressurizing according to the smoothness index, and keeping the linear pressure at 30-40 KN/m.
Preferably, the pulping in the step (1) uses a micro-bleaching pulping process.
Preferably, a foaming layer is coated after the pre-drying step and before the surface sizing step, and the foaming layer coating comprises deionized water, microsphere foaming powder, a degradation assistant, konjac flour and polyvinyl acetate emulsion which are mixed; double-sided coating, and single-sided coating is controlled to be 1.5-3.0 g/m 2.
Preferably, the polyvinyl acetate emulsion and the konjac flour are mixed and dissolved, stirred for 5-10 minutes, and then the mixture of the microsphere foaming powder and the prodegradant which are mixed with the deionized water is added and uniformly mixed together.
Preferably, in the step (4), the surface sizing metering rod type: 1#, gauge bar pressure 100 kpa; surface sizing is carried out on both sides, the single side is controlled to be 1.5-3.0 g/m2, the tension of a front paper sheet of a sizing part is 220N/m2, and the tension of a rear paper sheet of the sizing part is 200N/m 2.
Preferably, in the step (4), the boiling method of the gelatin comprises the following steps: dissolving and preparing sizing starch and polyvinyl alcohol by a boiling process, adding a moisture-proof agent after the preparation is finished, stirring for 10 minutes until the mixture is uniformly mixed, putting the mixture into a storage barrel for later use, and ensuring that the final concentration is 10-14 percent, the dosage of the moisture-proof agent per ton of paper is controlled to be 58kg, and the dosage of the polyvinyl alcohol is controlled to be 3-5 kg.
Preferably, the common salt packaging paper quantifies: 70-90 g/m2, 5.0-9.0% of water, 5.5Km or more of longitudinal fracture length, 2.0KPa or more of burst index, m2/g of longitudinal tear index, 9.0mN.m2/g of longitudinal tear index, 8.0 mu m/Pa.s or less of air permeability and 20-30 g/m2 of water absorption.
Preferably, other parameters of the paper machine are as follows: the net speed is 500m/min, the top net dewatering amount is 27%, the opening of a lip plate of a head box is 30.6mm, and the first line pressing pressure is as follows: 900kN/m, two-line pressure: 900 kN/m; crimp tension: 400 kN/m.
The invention has the beneficial effects that: good strength, high bursting strength and good moisture resistance, can be rapidly degraded, and meets the requirements of environmental protection and paper hygiene for food packaging:
1. starting from raw material selection and formula, the method adopts a novel process technology of firstly mixing raw materials and then slightly bleaching pulping, and adopts a conical mill pulping process, and specifically comprises the following steps: the method is characterized in that a raw material (wood chip) structure is researched, and broad wood chips and coastal pine wood chips are fully and physically stirred and mixed in a storage bin. The mixture ratio is based on the results of multiple laboratory researches on wood chip formulas and quality data detection and analysis of sheet making, and the optimal formula is finally determined to be 40% of broad wood chips and 60% of coastal pine wood chips (weight ratio). Researching pulping and pulping processes: according to the particularity required by the paper quality, the mixed wood chip cooking and pulping bleaching process is deeply researched (the H2O2 bleaching technology is adopted, and the ISO whiteness of the finished pulp is controlled to be 24-26 ℃; through laboratory pulp cooking and pulping process research, a reasonable pulping parameter control range (wet weight is 7-9 g, and pulping degree is 26-300 SR) is determined, and finally, the quality data of the sheet-making paper sample is very good.
2. The research on the surface sizing process and technology adopts a novel surface sizing process technical formula, a moisture-proof agent, polyvinyl alcohol and sizing starch, and a coating foaming layer, so that the high requirement of customers on quality is better met; the salt packaging paper developed by our company is consistently considered to have good strength, high bursting strength and good moisture resistance through customer use and information feedback, can be rapidly degraded, meets the environmental protection requirement, and simultaneously meets the sanitary requirement of paper for food packaging.
Detailed Description
The present invention is described in detail below for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the description of the present invention is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
Example 1: 70g frosted base paper
Mixing 40% of broad wood chips: mixing 60 percent of coastal pine wood chips in a bin according to the weight ratio, uniformly mixing, and controlling the ISO whiteness of unbleached pulp at 26 ℃ by adopting a chemical pulping method and an H2O2 micro-bleaching pulping technology; then pulping the mixed pulp by serially connecting three conical mills, wherein the pulping degree is 30 DEG SR, and the wet weight is 7-9 g; adding 10 kg/ton paper rosin size, 10 kg/ton cationic starch in paper pulp, 0.4 kg/ton paper retention aid and 100 kg/ton paper talcum powder through a sizing system to prepare diluted pulp to be screened, performing double-sided dehydration through lapping to ensure uniform fiber dispersion, ordered arrangement and uniform distribution of longitudinal and transverse fibers, and performing compound pressing on a wet paper sheet in a pressing part; the paper sheet which is dried to 95 percent of dryness enters a sizing part, and the paper sheet is subjected to surface sizing treatment by adopting a film transfer mode (the formula of the surface sizing process comprises a moisture-proof agent, polyvinyl alcohol and sizing starch); controlling the single-side glue application amount to be 3.0 g/square, and drying the treated wet paper; and (3) after post-drying treatment, passing the paper sheet with the dryness of 91-95% through a calender (under proper pressure), and then coiling the paper sheet to obtain the salt packaging paper with the quantitative weight of 70g/m 2.
The boiling method of the surface glue comprises the following steps: dissolving and preparing sizing starch and polyvinyl alcohol by a boiling process, adding a moisture-proof agent after the preparation is finished, stirring for 10 minutes until the mixture is uniformly mixed, putting the mixture into a storage barrel for later use, and ensuring that the final concentration is 14 percent, the dosage of the moisture-proof agent per ton of paper is controlled to be 58kg, and the dosage of the polyvinyl alcohol is controlled to be 3-5 kg.
Other parameters of the paper machine are as follows: the net speed is 500m/min, the top net dewatering amount is 27%, the opening of a lip plate of a head box is 30.6mm, and the first line pressing pressure is as follows: 900kN/m, two-line pressure: 900 kN/m; crimp tension: 400 kN/m.
The main indexes are as follows: 5.0-9.0% of water, more than or equal to 5.5Km of longitudinal fracture length, more than or equal to 2.0KPa, m2/g of burst index, more than or equal to 9.0mN.m2/g of longitudinal tear index, less than or equal to 8.0 mu m/Pa.s of air permeability, 20-30 g/m2 of water absorption, 5-15 s of average smoothness value, natural color of hue, sensory requirements and hygienic indexes meeting the national food safety standard of food contact paper board materials and products (GB 4806.8-2016). The qualified salt packaging paper can be produced according to the process, and the quality requirements of customers can be completely met.
Example 2
Mixing 40% of broad wood chips: mixing 60 percent of coastal pine wood chips in a bin according to the weight ratio, uniformly mixing, and controlling the ISO whiteness of unbleached pulp at 24 ℃ by adopting a chemical pulping method and an H2O2 micro-bleaching pulping technology; then pulping the mixed pulp by serially connecting three conical mills, wherein the pulping degree is 26 DEG SR, and the wet weight is 7-9 g; 5 kg/ton of paper rosin size agent, 8 kg/ton of cationic starch in paper pulp, 0.2 kg/ton of paper retention aid and 100 kg/ton of paper talcum powder are added through a sizing system to prepare diluted pulp to be screened, double-sided dehydration is carried out through lapping to ensure that fibers are uniformly dispersed, and longitudinal and transverse fibers are orderly and uniformly arranged, and wet paper sheets enter a pressing part for compound pressing; the paper sheet dried to 80% dryness enters into coating machine for coating, the single side is controlled at 1.5g/m2, the paper sheet dried to 90% dryness enters into glue applying part at 55-60 ℃, and the paper sheet is surface glue applying treated by film transfer mode (the formula of surface glue applying process is moisture proof agent + polyvinyl alcohol + glue applying starch); controlling the single-side glue application amount to be 1.5 g/square, and drying the treated wet paper; and (3) after post-drying treatment, passing the paper sheet with the dryness of 91-95% through a calender (under proper pressure), and then coiling the paper sheet to obtain the salt packaging paper with the quantitative weight of 70g/m 2.
The boiling method of the surface glue comprises the following steps: dissolving and preparing sizing starch and polyvinyl alcohol by a boiling process, adding a moisture-proof agent after the preparation is finished, stirring for 10 minutes until the mixture is uniformly mixed, putting the mixture into a storage barrel for later use, and ensuring that the final concentration is 10 percent, the dosage of the moisture-proof agent per ton of paper is controlled to be 58kg, and the dosage of the polyvinyl alcohol is controlled to be 3-5 kg.
Other parameters of the paper machine are as follows: the net speed is 500m/min, the top net dewatering amount is 27%, the opening of a lip plate of a head box is 30.6mm, and the first line pressing pressure is as follows: 900kN/m, two-line pressure: 900 kN/m; crimp tension: 400 kN/m.
Example 3
Mixing 40% of broad wood chips: mixing 60 percent of coastal pine wood chips in a bin according to the weight ratio, uniformly mixing, and controlling the ISO whiteness of unbleached pulp at 25 ℃ by adopting a chemical pulping method and an H2O2 micro-bleaching pulping technology; then pulping the mixed pulp by serially connecting three conical mills, wherein the pulping degree is 28 DEG SR, and the wet weight is 7-9 g; 8 kg/ton of paper rosin size agent, 9 kg/ton of cationic starch in paper pulp, 0.3 kg/ton of paper retention aid and 100 kg/ton of paper talcum powder are added through a sizing system to prepare diluted pulp to be screened, double-sided dehydration is carried out through lapping to ensure that fibers are uniformly dispersed, and longitudinal and transverse fibers are orderly and uniformly arranged, and wet paper sheets enter a pressing part for compound pressing; the paper sheet dried to 80% dryness enters into coating machine to be coated, the single side is controlled at 2g/m2, the paper sheet dried to 95% dryness enters into glue applying part at 55-60 ℃, and the paper sheet is subjected to surface glue applying treatment by adopting film transfer mode (the formula of the surface glue applying process is moisture-proof agent + polyvinyl alcohol + glue applying starch); controlling the single-side glue application amount to be 2.0 g/square, and drying the treated wet paper; and (3) after post-drying treatment, allowing the paper with the dryness of 91-95% to pass through a calender (under proper pressure), and then coiling the paper to obtain the salt packaging paper.
Boiling method of surface glue and other parameters of the paper machine: see examples 1-2.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (5)
1. The production process of salt packing paper includes the steps of mixing needle leaf and broad leaf wood chip, pulping, compounding pulp and adding supplementary material, making wet paper, pre-drying, surface sizing, post-drying, press polishing and finishing, and features that:
(1) pulping, wherein the pulp is prepared from 40-50% of broad and miscellaneous wood chips in percentage by weight before mixing: 50-60% of coastal pine wood chips;
(2) pulping, namely adopting a conical grinding process, wherein the pulping degree of mixed pulp is as follows: SR at 26-30 ℃ and wet weight of 7-9 g;
(3) adding auxiliary materials, wherein the dosage of the auxiliary materials to the oven-dried pulp is as follows: (a) the weight ratio of the rosin size is 0.5-1.0%; (b) the weight ratio of the retention aid is 0.02-0.04%; (c) the weight ratio of the cationic starch is 0.8-1.0% (d), the filler is talcum powder, and the adding amount is controlled according to 10%;
(4) coating a foaming layer: the foaming layer coating is prepared by mixing deionized water, microsphere foaming powder, a degradation assistant, konjaku flour and polyvinyl acetate emulsion, mixing and dissolving the polyvinyl acetate emulsion and the konjaku flour, stirring for 5-10 minutes, adding a mixture of the microsphere foaming powder and the degradation assistant mixed with the deionized water, and uniformly mixing; double-sided coating, and single-sided control of 1.5-2.0 g/m2；
(5) Applying surface glue: surface sizing adopts membrane transfer surface sizing, and the surface sizing is formed by mixing a moisture-proof agent, polyvinyl alcohol and sizing starch;
(6) calendering conditions are as follows: and (4) closing the calender, slightly pressurizing according to the smoothness index, and keeping the linear pressure at 30-40 KN/m.
2. The method for manufacturing common salt packaging paper as claimed in claim 1, wherein the pulping in the step (1) uses a micro-bleaching pulping process.
3. The method of manufacturing common salt wrap paper according to claim 1, wherein in said step (5), the surface sizing metering rod type: 1#, gauge bar pressure 100 kpa; applying glue on both surfaces, and controlling the single surface at 1.5-3.0 g/m2Paper tension 220N/m before glue applying part2After the size application part, the sheet tension is 200N/m2。
4. The method of manufacturing a common salt packaging paper according to claim 1, wherein the common salt packaging paper has a basis weight of: 70 to 90g/m25.0-9.0% of water, more than or equal to 5.5Km of longitudinal fracture length and more than or equal to 2.0KPa.m of burst index2Per g, longitudinal tear index is more than or equal to 9.0mN.m2The air permeability is less than or equal to 8.0 mu m/Pa.s, and the water absorption is 20-30 g/m2。
5. A method of manufacturing a salt wrap paper according to claim 1, wherein the other parameters of the paper machine are: the net speed is 500m/min, the top net dewatering amount is 27%, the opening of a lip plate of a head box is 30.6mm, and the first line pressing pressure is as follows: 900kN/m, two-line pressure: 900 kN/m; crimp tension: 400 kN/m.
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| CN201810897842.XA CN109183487B (en) | 2018-08-08 | 2018-08-08 | Method for making salt packaging paper |
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| CN110318302A (en) * | 2019-05-31 | 2019-10-11 | 岳阳林纸股份有限公司 | A kind of manufacturing method of straw paper |
| CN110512457B (en) * | 2019-08-08 | 2020-10-02 | 岳阳林纸股份有限公司 | Method for manufacturing oil-proof laminating base paper |
| CN111826993A (en) * | 2020-06-06 | 2020-10-27 | 岳阳林纸股份有限公司 | Moisture-proof packaging paper surface sizing liquid composition and preparation method thereof |
| CN114438824B (en) * | 2020-10-31 | 2023-04-07 | 上海紫丹食品包装印刷有限公司 | High-permeability packaging paper material and manufacturing method and application thereof |
| CN113026430B (en) * | 2021-03-30 | 2022-10-14 | 山东仁丰特种材料股份有限公司 | Film transfer coating food paper of fourdrinier vat paper machine and preparation method thereof |
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| GB1604847A (en) * | 1977-11-08 | 1981-12-16 | Hercules Ltd | External sizing of paper and board |
| CN101851872B (en) * | 2010-06-22 | 2012-02-01 | 岳阳林纸股份有限公司 | Pulping technology for deinked waste paper pulp used for making high-grade culture printing paper |
| CN102268845A (en) * | 2011-07-27 | 2011-12-07 | 岳阳林纸股份有限公司 | Food packing paper and production method thereof |
| CN102505572A (en) * | 2011-11-03 | 2012-06-20 | 岳阳林纸股份有限公司 | Method for producing noodle packing paper |
| CN108277695B (en) * | 2018-04-08 | 2020-06-12 | 岳阳林纸股份有限公司 | Method for manufacturing frosted base paper |
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