CN110565442A - production method of ultralow-quantitative biblical paper - Google Patents
production method of ultralow-quantitative biblical paper Download PDFInfo
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- CN110565442A CN110565442A CN201910867263.5A CN201910867263A CN110565442A CN 110565442 A CN110565442 A CN 110565442A CN 201910867263 A CN201910867263 A CN 201910867263A CN 110565442 A CN110565442 A CN 110565442A
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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
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/17—Ketenes, e.g. ketene dimers
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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
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
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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
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/56—Polyamines; Polyimines; Polyester-imides
-
- 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
- D21H17/675—Oxides, hydroxides or carbonates
-
- 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
-
- 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
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
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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
- D21H21/14—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
- D21H21/28—Colorants ; Pigments or opacifying 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
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Abstract
the invention discloses a production method of ultralow ~ weight Bingsu paper, which comprises the following steps of uniformly mixing a fiber raw material and titanium dioxide, then pulping, adding a filler, diluting the mixed slurry to a mass concentration of 0.5 ~ 1.0%, sequentially adding polyamide epichlorohydrin resin, cationic starch, polyethyleneimine, black dye and alkyl ketene dimer, carrying out net surfing forming treatment, carrying out squeezing dehydration and pre ~ drying treatment, applying glue to the two sides of the paper by using a glue applicator, carrying out post ~ drying, and finally carrying out calendaring treatment by using a calendar.
Description
Technical Field
The invention is applied to the field of papermaking, and particularly relates to a production method of ultralow-quantitative bible paper.
Background
The bible paper is used as high-grade tissue printing paper, is mainly used for printing bible paper printed matters such as dictionaries, dictionaries and the like, and has the characteristics of low quantification, thin paper page, high strength, high opacity and the like, the conventional bible paper has the quantification more than 28 g/square meter-45 g/square meter, and the low-quantification bible paper can reduce the cost and increase the information content (the information content of books and periodicals with the same weight can be improved by more than 50 percent) when being printed, and can reduce the weight of the printed matters and the transportation cost, so that a reader can conveniently carry the low-quantification bible paper.
Disclosure of Invention
The invention aims to provide a method for producing biblical paper, which aims to solve the problems in the background art.
1. In order to achieve the purpose, the invention provides the following technical scheme that the production method of the ultralow quantitative biblical paper comprises the following steps:
(1) Uniformly mixing the fiber raw material and titanium dioxide, then carrying out pulping operation, and then adding a filler;
(2) diluting the mixed slurry to a mass concentration of 0.5 ~ 1.0%, sequentially adding polyamide epoxy chloropropane resin, cationic starch, polyethyleneimine, black dye and alkyl ketene dimer, and performing net ~ feeding forming treatment;
(3) Then, carrying out squeezing dehydration and pre-drying treatment to obtain a dry paper sheet;
(4) And (3) carrying out double-sided sizing on the dry paper, carrying out post-drying treatment again, and then carrying out calendaring and reeling in sequence to obtain the paper.
preferably, in the step (1), the fiber raw material and the titanium dioxide are mixed and pulped according to the weight ratio of (6 ~ 6.5) to 1.
preferably, the fiber raw material consists of 60 ~ 70% of needle pulp and 30 ~ 40% of broad leaf pulp, wherein the beating degree of the needle pulp is (83 ~ 85) degree SR, the wet weight is (5.0 ~ 6.0) g, the beating degree of the broad leaf pulp is (78 ~ 80) degree SR, and the wet weight is (1.0 ~ 2.0) g.
Preferably, the amounts of the polyamide epichlorohydrin resin, the cationic starch, the polyethyleneimine, the black dye and the alkyl ketene dimer added in the step (2) are respectively (1-2)%, (0.1-0.2)%, (0.02-0.1)%, and (1-2)%, based on the total weight.
Preferably, the upper net pulp passes through 3 forming plates and 16 water scraping plates to be primarily dehydrated and formed, then passes through 2 weak vacuum boxes to be further dehydrated, is subjected to finishing treatment by a watermark roller, and finally passes through 4 vacuum box groups to increase the dehydration strength. Wherein the speed difference of the pulp screen is about-8 m/min, the shaking amplitude is 13mm, the shaking frequency is 380 times/min, the screen-entering depth of the watermark roller is-10 mm, the weak vacuum degree is controlled to be (-0.1 to-0.5) kpa, and the vacuum degree of the vacuum box is controlled to be (-9 to-16) kpa. The positions of waterlines are adjusted by adjusting the dehydration vacuum and the beating degree of pulp, so that paper sheets have good dehydration state, and meanwhile, the finished paper has good evenness.
Preferably, the pressing is carried out in three steps, and the pressing pressure is respectively 60 KN/m, 90 KN/m and 110 KN/m. Pressing is a mechanical pressing method which removes as much water as possible and improves the strength and tightness of the paper.
Preferably, the drying machine comprises a front drying part, a dispensing part and a rear drying part, and 23 drying cylinders, wherein the outer diameter of each drying cylinder is phi 1830mm, a 1# to 15# cylinder is the front drying part, a 16# to 23# cylinder is the rear drying part, and the dispensing part is arranged between the front drying part and the rear drying part. The temperature of 1# 2 is controlled to be (65-75) DEG C, the temperature of 3# 4 is controlled to be (70-80) DEG C, the temperature of 5# 8 is controlled to be (85-95) DEG C, the temperature of 9# 15 is controlled to be (100-110) DEG C, the temperature of 16# 17 is controlled to be (90-100) DEG C, the temperature of 19# 22 is controlled to be (85-95) DEG C, 23# is a cold cylinder, cooling water is introduced into the cylinder, and the temperature is (50-60) DEG C, so that the smoothness of paper is improved.
Preferably, the sizing agent in the step (4) is polyvinyl alcohol, polyacrylamide and polyhydroxylated resin according to the weight ratio (4.0-5.0): (4.0-5.0): (0.8-1.2), wherein the addition amount of the polyvinyl alcohol and the polyacrylamide is 2.5-3.5 percent of the total weight, and the addition amount of the polyhydroxylated resin is 0.5-0.8 percent of the total weight.
Preferably, the calendering process parameters in the step (4) are as follows: the upper roll of the calender is a rubber roll which is in contact with a non-net surface of the paper, the lower roll is a steel roll which is in contact with a net surface of the paper, the linear pressure (100-170) KN/m is used for controlling the smoothness (150-250) S of the paper, and the smoothness difference between the two surfaces is less than or equal to 25%.
preferably, the ultralow-weight biblical paper is produced by the production method of any one of claims 1 ~ 9.
Compared with the prior art, the invention has the beneficial effects that: compared with the conventional production technology of quantitative 28 g/square meter bible paper, the method has the advantages that the long fiber proportion is high, the beating and knocking degree is high, the fiber devillicate brooming is sufficient, the paper forming strength is high, and the paper breaking phenomenon is not easy to occur in the process of processing; the addition amount of the titanium dioxide in the filler is increased, the addition mode is improved, and the dye is added into the slurry, so that the product has high opacity, the printing strike-through phenomenon is not easy to occur, and the paper still has high strength under the condition of extremely thin paper, and meets the requirement of continuous paper printing; better evenness and opacity, and the requirement of double-sided printing.
Detailed Description
in order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the following claims and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
Example one
The embodiment provides a production method of ultralow quantitative biblical paper, which comprises the following steps:
(1) The fiber raw material and titanium dioxide are mixed according to the weight ratio of 6: 1, mixing and pulping. The fiber raw material consists of 70wt% of needle pulp and 30wt% of broad leaf pulp, the beating degree of the needle pulp is 84 ℃ SR, and the wet weight is 5.0 g; the beating degree of the broad leaf pulp is 78 ℃ SR, the wet weight is 1.0g, and then calcium carbonate and titanium dioxide are added, wherein the adding amount of the calcium carbonate is 7% of the weight of the bible paper, and the adding amount of the titanium dioxide is 15% of the weight of the bible paper;
(2) diluting the mixed slurry to the mass concentration of 0.7%, sequentially adding 1.5%, 0.15%, 0.08% and 1.5% of polyamide epichlorohydrin resin, cationic starch, polyethyleneimine, black dye and alkyl ketene dimer, respectively, and performing net-feeding forming treatment. The speed difference of the pulp screen is about 8m/min, the shaking amplitude is 13mm, the shaking frequency is 380 times/min, the screen-entering depth of the watermark roller is-10 mm, the weak vacuum degree is controlled to be (-0.1 to-0.5) kpa, and the vacuum degree of the vacuum box is controlled to be (-9 to-16) kpa.
(3) Then carrying out press dehydration and drying treatment, wherein the press pressure is respectively 60 KN/m, 90 KN/m and 110 KN/m. The control of drying treatment includes three portions of front drying, applying agent and rear drying, and its total number is 23 drying cylinders, and its external diameter is phi 1830mm, 1# 15# cylinder is front drying, 16# 23# cylinder is rear drying, and between the front drying cylinder and rear drying cylinder an agent applying machine is set. Controlling the temperature of 1# 2 to 65-75 ℃, the temperature of 3# 4 to 70-80 ℃, the temperature of 5# 8 to 85-95 ℃, the temperature of 9# 15 to 100-110 ℃, the temperature of 16# 17 to 90-100 ℃, the temperature of 19# 22 to 85-95 ℃, and the temperature of 23# cooling cylinder, wherein cooling water is introduced into the cylinder, and the temperature is 50-60 ℃, so as to obtain dry paper with the water content of 4.5%;
(4) carrying out double-sided sizing on the dry paper, wherein the sizing agent is polyvinyl alcohol, polyacrylamide and polyhydroxylated resin according to the weight ratio of 4.6: 4.6: 1, wherein the addition of polyvinyl alcohol and polyacrylamide is 2.7 percent of the total weight of the oven-dried pulp, the addition of polyhydroxylated resin is 0.6 percent of the total weight of the oven-dried pulp, and the mixture is obtained after the oven-dried pulp is subjected to press polishing and reeling in sequence, wherein the control parameters of the press polishing treatment are as follows: the roller on the calender is the rubber roll, and the non-wire side of contact paper, lower roll are the steel face, contact paper wire side, line pressure 150KN/m, and the performance index of the bible paper that this embodiment obtained is: the weight is 22.5 g/square meter, the thickness is 28.7 mu m, the longitudinal tensile strength is 1.55 KN/m, the longitudinal elongation is 1.4%, the longitudinal wet tensile strength is 0.13 KN/m, the transverse expansion rate is 2.7%, the front smoothness is 183S, the back smoothness is 165S, the difference between the front smoothness and the back smoothness is 10%, the front printing surface strength is 2.7m/S, the back printing surface strength is 4.0 m/S, the opacity is 77%, the D65 brightness is 84%, the ash content is 19.6%, and the Cobb60S 11.2.2 g/m.
example two
The embodiment provides a production method of ultralow quantitative biblical paper, which comprises the following steps:
(1) The fiber raw material and titanium dioxide are mixed according to the weight ratio of 6.5: 1, the fiber raw materials consist of 60wt% of needle pulp and 40wt% of broad leaf pulp, the beating degree of the needle pulp is 84 DEG SR, the wet weight is 5.0g, the beating degree of the broad leaf pulp is 78 DEG SR, and the wet weight is 1.0 g; then adding calcium carbonate and titanium dioxide, wherein the addition amount of the calcium carbonate is 7% of the weight of the bible paper, and the addition amount of the titanium dioxide is 10% of the weight of the bible paper;
(2) Diluting the mixed slurry to the mass concentration of 0.7%, sequentially adding polyamide epichlorohydrin resin, cationic starch, polyethyleneimine, black dye and alkyl ketene dimer, wherein the addition amounts of the polyamide epichlorohydrin resin, the cationic starch, the polyethyleneimine, the black dye and the alkyl ketene dimer are respectively 1.5%, 0.15%, 0.08% and 1.5% of the total weight, and carrying out net-surfing forming treatment.
(3) Then carrying out press dehydration and drying treatment, wherein the press pressure is respectively 60 KN/m, 90 KN/m and 110 KN/m. The control of drying treatment includes three portions of front drying, applying agent and rear drying, and its total number is 23 drying cylinders, and its external diameter is phi 1830mm, 1# 15# cylinder is front drying, 16# 23# cylinder is rear drying, and between the front drying cylinder and rear drying cylinder an agent applying machine is set. Controlling the temperature of 1# 2 to 65-75 ℃, the temperature of 3# 4 to 70-80 ℃, the temperature of 5# 8 to 85-95 ℃, the temperature of 9# 15 to 100-110 ℃, the temperature of 16# 17 to 90-100 ℃, the temperature of 19# 22 to 85-95 ℃, and the temperature of 23# cooling cylinder, wherein cooling water is introduced into the cylinder, and the temperature is 50-60 ℃, so as to obtain dry paper with the water content of 4.5%;
(4) Carrying out double-sided sizing on the dry paper, wherein the sizing agent is polyvinyl alcohol, polyacrylamide and polyhydroxylated resin according to the weight ratio of 4.6: 4.6: 1, wherein the addition of polyvinyl alcohol and polyacrylamide is 2.7 percent of the total weight of the oven-dry pulp, the addition of polyhydroxylated resin is 0.6 percent of the total weight of the oven-dry pulp, and the mixture is obtained after calendaring and reeling in sequence, wherein the control parameters of calendaring are as follows: the upper roll of the calender is a rubber roll which is in contact with the non-net surface of the paper, the lower roll is a steel surface which is in contact with the net surface of the paper, and the linear pressure is 100 KN/m.
The performance indexes of the bible paper obtained in the embodiment are as follows: the weight is 22.8 g/square meter, the thickness is 29.6 mu m, and the longitudinal tensile strength is 1.47 KN/m. The elongation in the machine direction is 1.3%, the wet tensile strength in the machine direction is 0.12 KN/m, the transverse direction stretch ratio is 2.8%, the front smoothness is 164S, the back smoothness is 157S, the front smoothness difference is 4%, the front printing surface strength is 1.9 m/S, the back printing surface strength is 3.6m/S, the opacity is 75%, the D65 brightness is 84%, the ash content is 17.5%, and the Cobb60S 11.2.2 g/m are shown.
Comparative example 1
The comparative example provides a production method of the ultralow-weight biblical paper, and the method is different from the first example in that: the fiber raw material consists of needle pulp of 50wt% and broad leaf pulp of 50wt%, the beating degree of the needle pulp is 76 ℃ SR, and the wet weight is 7.0 g; the beating degree of the broad leaf pulp is 76 ℃ SR, and the wet weight is 1.0 g. The other conditions were the same as in the first embodiment.
The performance indexes of the bible paper obtained by the comparative example are as follows: the weight is 22.5 g/square meter, the thickness is 28.7 mu m, the longitudinal tensile strength is 1.21 KN/m, the longitudinal elongation is 1.3%, the longitudinal wet tensile strength is 0.11 KN/m, the transverse expansion rate is 2.5%, the front smoothness is 180S, the back smoothness is 155S, the difference between the front smoothness and the back smoothness is 14%, the front printing surface strength is 1.6m/S, the back printing surface strength is 2.7m/S, the opacity is 77%, the D65 brightness is 84%, the ash content is 19.2%, and the Cobb60S 12.2.2 g/m.
Comparative example 2
The comparative example provides a production method of the ultralow-weight biblical paper, and the method is different from the first example in that: the polyamide epichlorohydrin resin is not added into the mixed slurry. The other conditions were the same as in the first embodiment.
The performance indexes of the bible paper obtained by the comparative example are as follows: the weight is 22.5 g/square meter, the thickness is 28.7 mu m, and the longitudinal tensile strength is 1.55 KN/m. The machine direction elongation rate is 1.4%, the machine direction wet tensile strength is 0.07 KN/m, the transverse direction stretch rate is 3.5%, the front side smoothness is 183S, the back side smoothness is 165S, the front side smoothness difference is 10%, the front side printing surface strength is 2.7m/S, the back side printing surface strength is 4.0 m/S, the opacity is 77%, the D65 brightness is 84%, the ash content is 19.6%, and the Cobb60S 11.2.2 g/m.
Comparative example 3
the comparative example provides a production method of the ultralow-weight biblical paper, and the method is different from the first example in that:
The dry paper is subjected to double-sided sizing, wherein the double-sided sizing consists of oxidized starch and polyacrylamide, and the dissolving ratio is 1: 1. The addition amount of the oxidized starch and the polyacrylamide is 2.2 percent. The other conditions were the same as in the first embodiment.
The performance indexes of the bible paper obtained by the comparative example are as follows: the weight is 22.5 g/square meter, the thickness is 28.7 mu m, and the longitudinal tensile strength is 1.55 KN/m. The machine direction elongation rate is 1.4%, the machine direction wet tensile strength is 0.13 KN/m, the transverse direction stretch rate is 2.7%, the front side smoothness is 183S, the back side smoothness is 165S, the front side smoothness difference is 10%, the front side printing surface strength is 0.6m/S, the back side printing surface strength is 2.1 m/S, the opacity is 77%, the D65 brightness is 84%, the ash content is 19.6%, and the Cobb60S 11.2.2 g/m.
Comparative example 4
The comparative example provides a production method of ultralow quantitative biblical paper, which comprises the following steps:
(1) the fiber raw material consists of needle pulp of 50wt% and broad leaf pulp of 50wt%, the beating degree of the needle pulp is 76 ℃ SR, and the wet weight is 7.0 g; the pulping degree of the broad leaf pulp is 76 degrees SR, the wet weight is 1.0g, and then calcium carbonate is added, and the adding amount is 20 percent;
(2) Diluting the mixed slurry to the mass concentration of 0.7%, sequentially adding cationic starch, polyethyleneimine and alkyl ketene dimer, wherein the addition amounts of the cationic starch, the polyethyleneimine and the alkyl ketene dimer are respectively 1.5%, 0.15% and 1.5% of the total weight, and performing net-surfing forming treatment. The control parameters are the same as before
(3) then, carrying out squeezing dehydration and drying treatment, wherein the control parameters are the same as the above parameters, and obtaining a dry paper sheet with the water content of 4.5%;
(4) And (3) carrying out double-sided sizing on the dry paper, wherein the sizing agent is composed of oxidized starch and polyacrylamide, and the dissolving ratio is 1: 1. The addition amount of the oxidized starch and the polyacrylamide is 2.2 percent. After the post-drying, the product is obtained by sequentially carrying out calendaring and coiling, wherein the control parameters of the calendaring treatment are as follows: the upper roll of the calender is a rubber roll which is in contact with the non-net surface of the paper, the lower roll is a steel roll which is in contact with the net surface of the paper, and the linear pressure is 80KN/m.
The performance indexes of the bible paper obtained by the comparative example are as follows: the weight is 28 g/square meter, the thickness is 34 mu m, and the longitudinal tensile strength is 1.72 KN/m. Elongation in machine direction 1.5%, wet tensile strength in machine direction 0.08 KN/m, elongation in cross direction 3.5%, smoothness on front surface 120S, smoothness on back surface 103S, smoothness difference on front surface 14%, strength on front printing surface 1.0m/S, strength on back printing surface 2.2m/S, opacity 72%, D65 brightness 89%, ash content 15%, Cobb60S 25.6.6 g/m
| Quantification of | thickness of | Longitudinal tensile strength | Longitudinal elongation | longitudinal wet tensile strength | |
| Example 1 | 22.5g/㎡ | 28.7µm | 1.55 KN/m | 1.4% | 0.13 KN/m |
| Example 2 | 22.8g/㎡ | 29.6µm | 1.47 KN/m | 1.3% | 0.12 KN/m |
| Comparative example 1 | 22.5g/㎡ | 28.7µm | 1.21 KN/m | 1.3% | 0.11 KN/m |
| Comparative example 2 | 22.5g/㎡ | 28.7µm | 1.55 KN/m | 1.4% | 0.07 KN/m |
| Comparative example 3 | 22.5g/㎡ | 28.7µm | 1.55 KN/m | 1.4% | 0.13 KN/m |
| comparative example 4 | 28g/㎡ | 34µm | 1.72 KN/m | 1.5% | 0.08 KN/m |
| Transverse expansion ratio | Front surface smoothness | Smoothness of the back side | poor smoothness of front and back surfaces | Front side printing surface strength | |
| Example 1 | 2.7% | 183S | 165S | 10% | 2.7m/s |
| Example 2 | 2.8% | 164S | 157S | 4% | 1.9 m/s |
| Comparative example 1 | 2.5% | 180S | 155S | 14% | 1.6m/s |
| Comparative example 2 | 3.5% | 183S | 165S | 10% | 2.7m/s |
| comparative example 3 | 2.7% | 183S | 165S | 10% | 0.6m/s |
| Comparative example 4 | 3.5% | 120S | 103S | 14% | 1.0m/s |
| Reverse printing surface strength | Opacity | D65 Brightness | Ash content | Cobb60s | |
| example 1 | 4.0 m/s | 77% | 84% | 19.6% | 11.2g/m² |
| Example 2 | 3.6m/s | 75% | 84% | 17.5% | 11.2g/m² |
| Comparative example 1 | 2.7 m/s | 77% | 84% | 19.2% | 12.2g/m² |
| Comparative example 2 | 4.0 m/s | 77% | 84% | 19.6% | 11.2g/m² |
| Comparative example 3 | 2.1 m/s | 77% | 84% | 19.6% | 11.2g/m² |
| Comparative example 4 | 2.2m/s | 72% | 89% | 15% | 25.6g/m² |
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. the production method of the ultralow-quantitative biblical paper is characterized by comprising the following steps of: the method comprises the following steps:
Uniformly mixing the fiber raw material and titanium dioxide, then carrying out pulping operation, and then adding a filler;
diluting the mixed slurry to a mass concentration of 0.5 ~ 1.0%, sequentially adding polyamide epoxy chloropropane resin, cationic starch, polyethyleneimine, black dye and alkyl ketene dimer, and performing net ~ feeding forming treatment;
Then, carrying out squeezing dehydration and pre-drying treatment to obtain a dry paper sheet;
And (3) carrying out double-sided sizing on the dry paper, carrying out post-drying treatment again, and then carrying out calendaring and reeling in sequence to obtain the paper.
2. the production method of the ultralow ~ weight biblical paper according to claim 1, wherein in the step (1), the fiber raw material and the titanium dioxide are mixed and pulped according to the weight ratio of (6 ~ 6.5) to 1.
3. the production method of the ultralow ~ basis ~ weight biblical paper according to claim 2, characterized in that the fiber raw materials consist of 60 ~ 70% of needle pulp and 30 ~ 40% of broadleaf pulp, wherein the beating degree (83 ~ 85) of the needle pulp is zero degree SR, and the wet weight (5.0 ~ 6.0) g, the beating degree (78 ~ 80) of the broadleaf pulp is zero degree SR, and the wet weight (1.0 ~ 2.0) g.
4. The method for producing the biblical paper with the ultralow weight according to claim 1, wherein; in the step (2), the addition amounts of the polyamide epichlorohydrin resin, the cationic starch, the polyethyleneimine, the black dye and the alkyl ketene dimer are respectively (1-2)%, (0.1-0.2)%, (0.02-0.1)%, and (1-2)%, based on the total weight.
5. the method for producing the biblical paper with the ultralow weight according to claim 1, wherein; the technological parameters of the upper wire forming treatment are as follows: the upper pulp passes through 3 forming plates and 16 water scraping plates to be primarily dehydrated and formed, then passes through 2 weak vacuum boxes to be further dehydrated, is subjected to finishing treatment by a watermark roll, and finally passes through 4 vacuum box groups to increase the dehydration strength, wherein the pulp net speed difference is about-8 m/min, the shaking amplitude is 13mm, the vibration frequency is 380 times/min, the screen-entering depth of the watermark roll is-10 mm, the weak vacuum degree is controlled to be (-0.1 to-0.5) kpa, the vacuum degree of the vacuum boxes is controlled to be (-9 to-16) kpa, and the position of a waterline is adjusted by adjusting the dehydration vacuum and the pulp beating degree, so that a paper sheet has a good dehydration state, and meanwhile, the formed paper has good evenness.
6. The method for producing the biblical paper with the ultralow weight according to claim 1, wherein; the technological parameters of the squeezing dehydration are as follows: and three-step pressing is carried out, wherein the pressing pressure is respectively 60 KN/m, 90 KN/m and 110 KN/m, and the pressing is a mechanical overstock method, so that water is removed as much as possible, and the strength and tightness of the paper are improved.
7. The method for producing the biblical paper with the ultralow weight according to claim 1, wherein; the drying treatment process parameters are as follows: the paper drying machine comprises a front dryer, a dispensing agent and a rear dryer, wherein 23 drying cylinders are arranged in total, the outer diameter of each drying cylinder is phi 1830mm, a 1# to 15# cylinder is the front dryer, a 16# to 23# cylinder is the rear dryer, a dispensing machine is arranged between the front dryer and the rear dryer, the temperature of the 1# to 2# is controlled to be (65-75) DEG C, the temperature of the 3# to 4# is controlled to be (70-80) DEG C, the temperature of the 5# to 8# is controlled to be (85-95) DEG C, the temperature of the 9# to 15# is controlled to be (100-110) DEG C, the temperature of the 16# to 17# is controlled to be (90-100) DEG C, the temperature of the 19# to 22# is controlled to be (85-95) DEG C, the 23# is a cold cylinder, cooling water is introduced into the cylinder, and the.
8. The method for producing the biblical paper with the ultralow weight according to claim 1, wherein; the sizing agent in the step (4) is polyvinyl alcohol, polyacrylamide and polyhydroxylated resin according to the weight ratio (4.0-5.0): (4.0-5.0): (0.8-1.2), wherein the addition amount of the polyvinyl alcohol and the polyacrylamide is 2.5-3.5 percent of the total weight, and the addition amount of the polyhydroxylated resin is 0.5-0.8 percent of the total weight.
9. The method for producing the biblical paper with the ultralow weight according to claim 1, wherein; the technological parameters of the polishing treatment in the step (4) are as follows: the upper roll of the calender is a rubber roll which is in contact with a non-net surface of the paper, the lower roll is a steel roll which is in contact with a net surface of the paper, the linear pressure (100-170) KN/m is used for controlling the smoothness (150-250) S of the paper, and the smoothness difference between the two surfaces is less than or equal to 25%.
10. an ultra-low quantitative biblical paper, which is characterized by being produced by the production method of any one of claims 1 ~ 9.
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| CN111622018A (en) * | 2020-05-14 | 2020-09-04 | 仙鹤股份有限公司 | Production method of large ink level printing biblical paper |
| CN111691236A (en) * | 2020-05-26 | 2020-09-22 | 仙鹤股份有限公司 | Production method of quick-drying bible paper |
| CN112064399A (en) * | 2020-08-07 | 2020-12-11 | 浙江哲丰新材料有限公司 | Preparation method of high-filling bible paper |
| CN112522982A (en) * | 2020-03-18 | 2021-03-19 | 欣龙控股（集团）股份有限公司 | Hemp antibacterial material and production method and application thereof |
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