CN118241504A - Bobbin body paper and manufacturing method thereof - Google Patents
Bobbin body paper and manufacturing method thereof Download PDFInfo
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- CN118241504A CN118241504A CN202410521906.1A CN202410521906A CN118241504A CN 118241504 A CN118241504 A CN 118241504A CN 202410521906 A CN202410521906 A CN 202410521906A CN 118241504 A CN118241504 A CN 118241504A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 229920002522 Wood fibre Polymers 0.000 claims abstract description 29
- 239000002025 wood fiber Substances 0.000 claims abstract description 29
- 239000010893 paper waste Substances 0.000 claims abstract description 24
- 229920002472 Starch Polymers 0.000 claims abstract description 22
- 239000008107 starch Substances 0.000 claims abstract description 22
- 235000019698 starch Nutrition 0.000 claims abstract description 22
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 19
- 239000002893 slag Substances 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims description 85
- 238000004513 sizing Methods 0.000 claims description 28
- 238000004537 pulping Methods 0.000 claims description 25
- 239000004576 sand Substances 0.000 claims description 15
- 239000012535 impurity Substances 0.000 claims description 12
- 238000012216 screening Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000003490 calendering Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000007865 diluting Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 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 3
- 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 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 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 3
- 239000010410 layer Substances 0.000 description 69
- 239000011229 interlayer Substances 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000009172 bursting Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011436 cob Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/04—Complete machines for making continuous webs of paper of the cylinder 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
- D21H17/01—Waste products, e.g. sludge
-
- 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
Landscapes
- Paper (AREA)
Abstract
The invention provides a bobbin base paper and a bobbin base paper manufacturing method, wherein the bobbin base paper comprises a base paper layer, a core paper layer, a lining paper layer and a surface paper layer which are sequentially stacked, each paper layer is manufactured by a mixed pulp consisting of pulp residues, wood fiber pulp, starch and waste paper pulp through a cylinder mould forming technology, and the proportion of the pulp residues, the wood fiber pulp, the starch and the waste paper pulp in the mixed pulp is 60% -80%, 10% -30%, 1% -5% and 0% -15% in sequence. By changing the proportion of pulp slag, wood fiber, waste paper pulp and starch, wood fiber pulp with low price is used, and most of the wood fiber pulp is pulp slag, so that the use of waste paper pulp is reduced, the manufacturing cost of the bobbin base paper is reduced, and the cost performance of the bobbin base paper is improved.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to bobbin base paper and a manufacturing method thereof.
Background
With the advent of the micro-profit age of cartons, manufacturers of cartons have sought to reduce production costs. Some low-price high-performance base papers are favored by the market. Low-cost bobbin base paper is not only used for paper tube processing, but also gradually applied to paper box products, such as interlayers of paper boxes, chemical paper barrels and the like, and is manufactured by using the bobbin base paper. The bobbin base paper requires higher physical strength, so the paper making requirement is higher. The raw materials for making the traditional bobbin body paper are all or most waste pulp slag and little waste paper. If the strength of the bobbin base paper is increased by increasing the proportion of waste paper, the production cost is increased, resulting in reduced or even no profits.
Disclosure of Invention
The invention aims to provide bobbin body paper with low cost and a manufacturing method of the bobbin body paper.
In order to achieve the above object, the present invention provides the following technical solutions:
as a first aspect, the invention provides a bobbin base paper, comprising a base paper layer, a core paper layer, a lining paper layer and a surface paper layer which are sequentially stacked, wherein each paper layer is made of mixed pulp consisting of pulp residues, wood fiber pulp, starch and waste paper pulp through a cylinder mould forming technology, and the proportions of the pulp residues, the wood fiber pulp, the starch and the waste paper pulp in the mixed pulp are sequentially 60% -80%, 10% -30%, 1% -5% and 0-15%.
In one embodiment, the bottom paper layer is formed by two cylinder mould cages, the core paper layer is formed by two cylinder mould cages, the lining paper layer is formed by two cylinder mould cages, and the surface paper layer is formed by one cylinder mould cage.
In one embodiment, the thickness of the bobbin base paper is 0.4-0.75mm, and the moisture is 5% -10%; the gram weight of the bottom paper layer is 80-145 g/square meter, the gram weight of the core paper layer is 80-145 g/square meter, the gram weight of the lining paper layer is 80-145 g/square meter, and the gram weight of the surface paper layer is 40-70 g/square meter.
As a second aspect, the present invention also provides a method for manufacturing a bobbin base paper for manufacturing the bobbin base paper, including the steps of:
S1, preparing main sizing agent of bobbin base paper: preparing main slurry consisting of pulp slag, wood fiber pulp and waste paper pulp, separating filaments by a high-concentration pulping machine, and storing in a pulping tower;
S2, sizing: adding main sizing agent in a sizing tower into sizing pools corresponding to each paper layer of a bottom paper layer, a core paper layer, a lining paper layer and a face paper layer respectively, and adding starch solution with the concentration of 2% -5% into each sizing pool;
s3, diluting: diluting the slurry from the sizing tank to 0.5% -1%, and feeding the slurry into a slurry pump, wherein the slurry pump and the sizing tank are arranged in one-to-one correspondence;
s4, stabilizing: the high-level boxes are respectively arranged corresponding to the bottom paper layer, the core paper layer, the lining paper layer and the surface paper layer, and the slurry from the slurry pump is stabilized through the high-level boxes;
S4, dehydration molding: cylinder mould cages are arranged corresponding to the bottom paper layer, the core paper layer, the lining paper layer and the surface paper layer respectively, and the slurry from the high-level box is dehydrated through the cylinder mould cages, so that the concentration of the slurry is increased from 0.5% -1% to 20% -25%;
s6, squeezing and drying: squeezing the raw materials of the face paper layer, the lining paper layer, the core paper layer and the bottom paper layer which are formed by the cylinder mould, wherein the concentration is increased from 20% -25% to 46% -55%, and then drying the raw materials, and the concentration is increased from 46% -55% to 90% -95%;
S7, calendaring and coiling: and (3) carrying out calendaring and coiling on the dried bobbin raw material to obtain finished bobbin base paper.
In one embodiment, the step S1 specifically includes the following steps:
S11, pulping: adding wood fiber pulp and waste paper into a pulper according to a ratio of 70-100:0-30 for pulping to obtain high-concentration pulp, and feeding the high-concentration pulp into a pulp discharging tank and then into a mixing tank;
S12, mixing: adding the pulp residue from other paper machines into a mixing tank, and mixing the pulp residue with the high-concentration pulp of S11 according to the ratio of 50-80:20-50 to prepare mixed pulp;
s13, high-concentration sand removal: putting the high-concentration slurry in the step S12 into a high-concentration sand remover to remove heavy impurities in the high-concentration sand remover, thereby obtaining low-concentration slurry;
S14, coarse screening: putting the low-concentration slurry prepared in the step S13 into a pressure screen for screening, and separating impurities with larger sizes to obtain coarse screen slurry;
s15, low-concentration sand removal: putting the coarse screen slurry prepared in the step S14 into a low-concentration slag remover to remove fine sand grains and other heavy impurities, thereby obtaining a sand-removed slurry;
s16, fine screening: putting the degritted slurry prepared in the step S15 into a fine screen pressure screen for screening, and removing impurities with small size in the slurry to obtain clean slurry;
s17, multi-disc concentration: putting the clean slurry prepared in the step S16 into a multi-disc thickener for concentration to obtain concentrated slurry;
s18, pulping with high concentration: delivering the concentrated slurry prepared in the step S17 into a high-concentration pulping machine for pulping to obtain the main slurry;
S19, storing: the main slurry prepared in S18 is stored in a slurry forming tower.
In one embodiment, in step S3, a slurry inlet of the slurry pump is provided with a material mixing pipe, and the material mixing pipe is connected with two slurry inlet pipes, wherein one slurry inlet pipe is connected to the sizing tank, and the other slurry inlet pipe is connected to the white water barrel.
In one embodiment, in step S4, rosin size and aluminum sulfate are further added to the slurry in the headbox.
In one embodiment, the high-level box and the cylinder mould are respectively provided with seven, and the cylinder mould and the high-level box are arranged in a one-to-one correspondence; wherein,
Two high-level boxes and two cylinder mould cages are arranged corresponding to the bottom paper layer;
two high-level boxes and two cylinder mould cages are arranged corresponding to the core paper layers;
Two high-level boxes and two cylinder mould cages are arranged corresponding to the lining paper layers;
a high-level box and a cylinder mould are arranged corresponding to the surface paper layer.
In one embodiment, in step S5, a starch solution having a concentration of 2% -5% is also sprayed onto the surface of the formed paper sheets.
The technical scheme provided by the invention has the beneficial effects that:
1. According to the bobbin base paper, the proportions of pulp residues, wood fibers, waste paper pulp and starch are changed, so that wood fiber pulp with low price is used, most of the wood fiber pulp is pulp residues, the use of waste paper pulp is reduced, the manufacturing cost of the bobbin base paper is reduced, and the cost performance of the bobbin base paper is improved.
2. The high-concentration pulping machine is used in the manufacturing method of the bobbin base paper, so that limit is fully divided into filaments, the hydrogen bonding of fibers is improved, and the tooth replacement strength, bursting strength and interlayer bonding strength of paper sheets are improved. Particularly, the pulping effect on the wood fiber pulp is very obvious, and the bonding strength of the wood fiber pulp is greatly improved, so that the strength requirement of the bobbin base paper is met.
3. The internal starch and the spraying starch are used for improving the ring crush strength, the burst strength and the interlayer bonding strength of the paper sheet.
4.7 Cylinder mould forming is used, so that uniformity and tightness of paper sheets are improved, and paper applicability is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments of the present invention will be briefly described below.
Fig. 1 is a flow chart of a manufacturing process of a bobbin base paper according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the invention is susceptible of embodiment in the drawings, it is to be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided to provide a more thorough and complete understanding of the invention. It should be understood that the drawings and embodiments of the invention are for illustration purposes only and are not intended to limit the scope of the present invention.
It should be understood that the various steps recited in the method embodiments of the present invention may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the invention is not limited in this respect.
The term "including" and variations thereof as used herein are intended to be open-ended, i.e., including, but not limited to. The term "coupled" may be either directly or indirectly through intervening components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments. Related definitions of other terms will be given in the description below.
Referring to fig. 1, fig. 1 is a flow chart of a process for manufacturing a bobbin base paper according to an embodiment of the present invention, which is used for manufacturing the bobbin base paper, improving paper performance and reducing production cost of the bobbin base paper.
The invention provides bobbin base paper, which comprises a base paper layer, a core paper layer, an interleaving paper layer and a face paper layer which are sequentially stacked, wherein each paper layer is prepared from mixed pulp consisting of pulp residues, wood fiber pulp, starch and waste paper pulp by a cylinder mould forming technology, and the proportions of the pulp residues, the wood fiber pulp, the starch and the waste paper pulp in the mixed pulp are 60% -80%, 10% -30%, 1% -5% and 0-15% in sequence.
By changing the proportion of pulp slag, wood fiber, waste paper pulp and starch, wood fiber pulp with low price is used, and most of the wood fiber pulp is pulp slag, so that the use of waste paper pulp is reduced, the manufacturing cost of the bobbin base paper is reduced, and the cost performance of the bobbin base paper is improved. In addition, the internal starch and the spraying starch are used for improving the ring crush strength, the burst strength and the interlayer bonding strength of the paper sheet.
In one embodiment, the bottom paper layer is formed by two cylinder mould cages, the core paper layer is formed by two cylinder mould cages, the lining paper layer is formed by two cylinder mould cages, and the surface paper layer is formed by one cylinder mould cage.
In one embodiment, the bobbin base paper has a grammage of 300-500 g/square meter, wherein the base paper layer has a grammage of 80-145 g/square meter, the core paper layer has a grammage of 80-145 g/square meter, the liner paper layer has a grammage of 80-145 g/square meter, and the face paper layer has a grammage of 40-70 g/square meter.
The physical indexes of the bobbin base paper are as follows: 1. the thickness is 0.4-0.75mm; 2. the water content is 5-10%; 3. the ring pressure index (longitudinal) is more than or equal to 15N.m/g; 4. the interlayer bonding strength is more than or equal to 350J/square meter; 5. water absorption (COBB value): 150-400 g/square meter; 6. the burst index is more than or equal to 2.2 kpa; 7. the banner quantitative difference is less than or equal to 5.0 percent.
As a second aspect, the present invention also provides a method for manufacturing a bobbin base paper for manufacturing the bobbin base paper, including the steps of:
s1, preparing main sizing agent of bobbin base paper: preparing main slurry consisting of pulp slag, wood fiber pulp and waste paper pulp, separating filaments by a high-concentration pulping machine, and storing in a pulping tower.
In the step S1, a high-concentration pulping machine is used, so that the fibers are fully split and fibrillated, the hydrogen bonding of the fibers is improved, and the ring crush strength, the burst strength and the interlayer bonding strength of the paper are improved. Particularly, the pulping effect on the wood fiber pulp is very obvious, and the bonding strength of the wood fiber pulp is greatly improved.
Therefore, on the basis of meeting the strength requirement of the bobbin base paper, the proportion of wood fiber pulp and pulp slag can be increased, the proportion of waste paper pulp is reduced, and the cost-price waste paper pulp is replaced by the wood fiber pulp and pulp slag with lower price, so that the cost of the bobbin base paper is reduced.
S2, sizing: and adding main sizing agent in the sizing tower into sizing tanks corresponding to each paper layer of the bottom paper layer, the core paper layer, the lining paper layer and the face paper layer respectively, adding starch solution with the concentration of 2-5% into each sizing tank, and adding the starch solution into the sizing tanks to improve the ring crush strength, the burst strength and the interlayer bonding strength of the formed paper sheet.
S3, diluting: and diluting the slurry from the sizing tank to 0.5% -1%, and feeding the slurry into a slurry pump, wherein the slurry pump and the sizing tank are arranged in one-to-one correspondence.
S4, stabilizing: and the high-level boxes are respectively arranged corresponding to the bottom paper layer, the core paper layer, the lining paper layer and the surface paper layer, and the slurry from the slurry pump is stabilized through the high-level boxes.
S4, dehydration molding: cylinder mould cages are arranged corresponding to the bottom paper layer, the core paper layer, the lining paper layer and the surface paper layer respectively, and the slurry from the high-level box is dehydrated through the cylinder mould cages, so that the concentration of the slurry is improved from 0.5% -1% to 20% -25%.
S6, squeezing and drying: the method comprises the steps of squeezing raw materials of a face paper layer, an lining paper layer, a core paper layer and a bottom paper layer which are formed by a cylinder mould, lifting the concentration from 20% -25% to 46% -55%, drying the raw materials, and lifting the concentration from 46% -55% to 90% -95%.
S7, calendaring and coiling: and (3) carrying out calendaring and coiling on the dried bobbin raw material to obtain finished bobbin base paper.
In one embodiment, the step S1 specifically includes the following steps:
s11, pulping: adding wood fiber pulp and waste paper into a pulper according to the ratio of 70-100:0-30 for pulping to prepare high-concentration pulp, and enabling the high-concentration pulp to enter a pulp discharging tank and then enter a mixing tank.
S12, mixing: adding the pulp from other paper machines into a mixing tank, and mixing the pulp and the high-concentration pulp of S11 according to the ratio of 50-80:20-50 to prepare mixed pulp.
S13, high-concentration sand removal: and (3) putting the high-concentration slurry in the step (S12) into a high-concentration sand remover to remove heavy impurities in the high-concentration sand remover, thereby obtaining low-concentration slurry.
S14, coarse screening: and (3) putting the low-concentration slurry prepared in the step (S13) into a pressure screen for screening, and separating impurities with larger sizes to obtain coarse screen slurry.
S15, low-concentration sand removal: and (3) putting the coarse screen slurry prepared in the step (S14) into a low-concentration slag remover, and removing fine sand grains and other heavy impurities to obtain the degritted slurry.
S16, fine screening: and (3) putting the degritted slurry prepared in the step (S15) into a fine screen pressure screen for screening, and removing impurities with small size in the slurry to obtain clean slurry.
S17, multi-disc concentration: and (3) putting the clean slurry prepared in the step (S16) into a multi-disc thickener for concentration to obtain concentrated slurry.
S18, pulping with high concentration: and (3) delivering the concentrated slurry prepared in the step (S17) into a high-concentration pulping machine for pulping to obtain the main slurry.
S19, storing: the main slurry prepared in S18 is stored in a slurry forming tower.
In one embodiment, in step S3, a slurry inlet of the slurry pump is provided with a material mixing pipe, and the material mixing pipe is connected with two slurry inlet pipes, wherein one slurry inlet pipe is connected to the sizing tank, and the other slurry inlet pipe is connected to the white water barrel.
In one embodiment, in step S4, rosin size and aluminum sulfate are further added to the slurry in the headbox to control the water absorption index of the formed sheet.
In one embodiment, the high-level box and the cylinder mould are respectively provided with seven, and the cylinder mould and the high-level box are arranged in a one-to-one correspondence; wherein, two high-level boxes and two cylinder mould cages are arranged corresponding to the bottom paper layer; two high-level boxes and two cylinder mould cages are arranged corresponding to the core paper layers; two high-level boxes and two cylinder mould cages are arranged corresponding to the lining paper layers; a high-level box and a cylinder mould are arranged corresponding to the surface paper layer. The plurality of cylinder mould cages are used for dehydration molding, so that the uniformity and the tightness of paper sheets are improved, and the applicability of the paper is improved.
In one embodiment, in step S5, a starch solution with a concentration of 2% -5% is sprayed to the surface of the paper sheet of each formed paper layer, so that the ring crush strength, the burst strength and the interlayer bonding strength of the paper sheet are further improved.
The performance test of the bobbin base paper of the invention is as follows:
according to metallographic analysis, the bobbin base paper has obvious product combination mechanism, and the paper meets the use requirements of customers through index detection of thickness, ring pressure, bursting resistance, water absorption and the like.
The above description is only illustrative of the preferred embodiments of the present invention and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the invention referred to in the present invention is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept described above. Such as the above-mentioned features and the features having similar functions (but not limited to) of the invention.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.
Claims (9)
1. The bobbin body paper is characterized by comprising a bottom paper layer, a core paper layer, a lining paper layer and a surface paper layer which are sequentially stacked, wherein each paper layer is made of mixed pulp consisting of pulp residues, wood fiber pulp, starch and waste paper pulp through a cylinder mould forming technology, and the proportion of the pulp residues, the wood fiber pulp, the starch and the waste paper pulp in the mixed pulp is 60% -80%, 10% -30%, 1% -5% and 0-15% in sequence.
2. The bobbin base paper according to claim 1, wherein the base paper layer is formed by two cylinder mould cages, the core paper layer is formed by two cylinder mould cages, the lining paper layer is formed by two cylinder mould cages, and the face paper layer is formed by one cylinder mould cage.
3. The bobbin base paper according to claim 2, wherein the bobbin base paper has a thickness of 0.4-0.75mm and a moisture content of 5% -10%; the gram weight of the bottom paper layer is 80-145 g/square meter, the gram weight of the core paper layer is 80-145 g/square meter, the gram weight of the lining paper layer is 80-145 g/square meter, and the gram weight of the surface paper layer is 40-70 g/square meter.
4. A method for manufacturing a bobbin base paper according to any one of claims 1 to 3, comprising the steps of:
S1, preparing main sizing agent of bobbin base paper: preparing main slurry consisting of pulp slag, wood fiber pulp and waste paper pulp, separating filaments by a high-concentration pulping machine, and storing in a pulping tower;
S2, sizing: adding main sizing agent in a sizing tower into sizing pools corresponding to each paper layer of a bottom paper layer, a core paper layer, a lining paper layer and a face paper layer respectively, and adding starch solution with the concentration of 2% -5% into each sizing pool;
s3, diluting: diluting the slurry from the sizing tank to 0.5% -1%, and feeding the slurry into a slurry pump, wherein the slurry pump and the sizing tank are arranged in one-to-one correspondence;
s4, stabilizing: the high-level boxes are respectively arranged corresponding to the bottom paper layer, the core paper layer, the lining paper layer and the surface paper layer, and the slurry from the slurry pump is stabilized through the high-level boxes;
S4, dehydration molding: cylinder mould cages are arranged corresponding to the bottom paper layer, the core paper layer, the lining paper layer and the surface paper layer respectively, and the slurry from the high-level box is dehydrated through the cylinder mould cages, so that the concentration of the slurry is increased from 0.5% -1% to 20% -25%;
s6, squeezing and drying: squeezing the raw materials of the face paper layer, the lining paper layer, the core paper layer and the bottom paper layer which are formed by the cylinder mould, wherein the concentration is increased from 20% -25% to 46% -55%, and then drying the raw materials, and the concentration is increased from 46% -55% to 90% -95%;
S7, calendaring and coiling: and (3) carrying out calendaring and coiling on the dried bobbin raw material to obtain finished bobbin base paper.
5. The method for manufacturing a bobbin base paper according to claim 4, wherein the step S1 specifically comprises the steps of:
S11, pulping: adding wood fiber pulp and waste paper into a pulper according to a ratio of 70-100:0-30 for pulping to obtain high-concentration pulp, and feeding the high-concentration pulp into a pulp discharging tank and then into a mixing tank;
S12, mixing: adding the pulp residue from other paper machines into a mixing tank, and mixing the pulp residue with the high-concentration pulp of S11 according to the ratio of 50-80:20-50 to prepare mixed pulp;
s13, high-concentration sand removal: putting the high-concentration slurry in the step S12 into a high-concentration sand remover to remove heavy impurities in the high-concentration sand remover, thereby obtaining low-concentration slurry;
S14, coarse screening: putting the low-concentration slurry prepared in the step S13 into a pressure screen for screening, and separating impurities with larger sizes to obtain coarse screen slurry;
s15, low-concentration sand removal: putting the coarse screen slurry prepared in the step S14 into a low-concentration slag remover to remove fine sand grains and other heavy impurities, thereby obtaining a sand-removed slurry;
s16, fine screening: putting the degritted slurry prepared in the step S15 into a fine screen pressure screen for screening, and removing impurities with small size in the slurry to obtain clean slurry;
s17, multi-disc concentration: putting the clean slurry prepared in the step S16 into a multi-disc thickener for concentration to obtain concentrated slurry;
s18, pulping with high concentration: delivering the concentrated slurry prepared in the step S17 into a high-concentration pulping machine for pulping to obtain the main slurry;
S19, storing: the main slurry prepared in S18 is stored in a slurry forming tower.
6. The method according to claim 4, wherein in step S3, a material mixing pipe is provided at a pulp inlet of the pulp pump, and two pulp feeding pipes are connected to the material mixing pipe, wherein one pulp feeding pipe is connected to the sizing tank, and the other pulp feeding pipe is connected to the white water tub.
7. The method for producing a bobbin base paper according to claim 4, wherein in step S4, rosin size and aluminum sulfate are further added to the slurry in the high-level tank.
8. The method for manufacturing bobbin base paper according to claim 4, wherein seven high-level boxes and cylinder mould cages are respectively arranged, and the cylinder mould cages are arranged in one-to-one correspondence with the high-level boxes; wherein,
Two high-level boxes and two cylinder mould cages are arranged corresponding to the bottom paper layer;
two high-level boxes and two cylinder mould cages are arranged corresponding to the core paper layers;
Two high-level boxes and two cylinder mould cages are arranged corresponding to the lining paper layers;
a high-level box and a cylinder mould are arranged corresponding to the surface paper layer.
9. The method according to claim 4, wherein in step S5, a starch solution having a concentration of 2% to 5% is sprayed onto the surface of each formed paper layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410521906.1A CN118241504A (en) | 2024-04-28 | 2024-04-28 | Bobbin body paper and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410521906.1A CN118241504A (en) | 2024-04-28 | 2024-04-28 | Bobbin body paper and manufacturing method thereof |
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| CN118241504A true CN118241504A (en) | 2024-06-25 |
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| CN202410521906.1A Pending CN118241504A (en) | 2024-04-28 | 2024-04-28 | Bobbin body paper and manufacturing method thereof |
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