CN216663635U - High-strength multilayer kraft box paperboard - Google Patents
High-strength multilayer kraft box paperboard Download PDFInfo
- Publication number
- CN216663635U CN216663635U CN202120717082.7U CN202120717082U CN216663635U CN 216663635 U CN216663635 U CN 216663635U CN 202120717082 U CN202120717082 U CN 202120717082U CN 216663635 U CN216663635 U CN 216663635U
- Authority
- CN
- China
- Prior art keywords
- pulp
- layer
- fiber
- parts
- fibers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Landscapes
- Paper (AREA)
Abstract
The utility model belongs to the technical field of papermaking, and particularly relates to a high-strength multilayer kraft box paperboard. The utility model provides a high-strength multilayer kraft liner board, which aims at solving the problems that in the prior art, the mode of pulping waste paper is mostly directly adopted without distinction, the value of waste paper fiber cannot be utilized to the maximum extent, and the production cost is improved. The utility model adopts a multilayer structure, simultaneously adopts a fiber grading technology to grade the waste paper into long fibers, medium fibers and short fibers, and respectively takes the long fibers, the medium fibers and the short fibers as main components to form a surface layer, a bottom layer and a core layer of the paperboard, thereby more fully utilizing the value of the waste paper fibers, improving the strength and reducing the production cost.
Description
Technical Field
The utility model belongs to the technical field of papermaking, and particularly relates to a high-strength multilayer kraft box paperboard.
Background
Along with the social development and the continuous improvement of the living standard of people, the demand of kraft liner board paper is more and more, and especially in the consumer goods industry with higher requirements on carton quality and printing, the demand increase is reflected in the requirements on the quality and the high grade of kraft liner board paper. The banner ration, smoothness, thickness and other indicators of kraft liner board paper indicate that the uniformity index has great influence on the quality of subsequent printing and coating processing, the better the uniformity of the base paper, the more uniform the fiber arrangement, the more uniform the strength and smoothness of the base paper, the better the quality of kraft liner board paper, and the higher the grade. Therefore, high uniformity of appearance indexes such as banner quantification and smoothness and high strength of mechanical indexes such as burst index and interlayer bonding strength are required to be controlled in the production of high-grade kraft liner board.
At present, the market of high-grade kraft liner board is mainly occupied by foreign products, and representatives of the market include Russian Bratsk kraft liner board, American Georgia-Pacific kraft liner board and the like. The Russian Bratsk kraft liner board paper is made of unbleached needle-leaf pulp, is smooth in surface, less in surface black spots, small in front-back two-side color difference and flatness difference, high in positioning end and mainly used for packaging high-requirement high-standard products; the technical indexes are as follows: quantitative determination of 140g/m2The deviation of gram weight is plus or minus 3 g; burst index is not less than 2.5 Kpa.m2G, transverse ring pressure index is not less than 7.8 N.m/g, and interlayer bonding strength is not less than 180J/m2Transverse folding resistance more than 25 times, smoothness more than 12s, and front water absorption of 60g/m2The product performance is at the leading level internationally. However, the kraft liner board paper produced by the method has good strength and quality and high grade,however, the production cost is high due to the papermaking of pure wood pulp, and the excessive consumption of fiber resources is easily caused. Therefore, recently, attempts have been made to produce kraft liner boards from recycled fibers. Old corrugated cardboard pulp is commonly used in north america, and mixed office waste is also used in the production of kraft cardboard in central europe and asia. However, the kraft liner board made of recycled fiber has disadvantages in terms of tensile strength, folding resistance, surface smoothness of paper and coating uniformity.
In the last 10 years, with the increasing demand of the packaging market for the quality and quantity of the packaging boxes with exquisite exterior surfaces, the coated kraft liner board paper becomes one of the fastest growing varieties in the paper industry market in China. At present, in the prior art, the mode of pulping waste paper is mostly directly adopted when the kraft liner board is prepared, and the method is not distinguished, so that the value of waste paper fiber cannot be utilized to the maximum extent, and the production cost is improved.
For example, the chinese patent discloses a process for producing low-gram-weight high-strength heavy-duty packaging craft paper by recycling waste paper [ application number: 201510008443.X ], the utility model patent comprises the following steps: 1. waste paper pretreatment: crushing waste paper, and then carrying out deinking treatment on the crushed paper by using a deinking agent to obtain waste paper material; 2. pulping: taking needle-leaved wood and the waste paper material obtained in the step 1 as raw materials, cooking the raw materials by a sulfate method, adding cassava starch, an antibacterial agent and a reinforcing agent during cooking, adding biological enzyme and polyacrylamide into the obtained paper pulp for pulping, and separating long fiber paper pulp from the obtained paper pulp by a fiber grading sieve; 3. papermaking: and (3) making paper from the long fiber paper pulp obtained in the step (2) to obtain the finished product of the kraft paper.
The utility model has the advantages that the power consumption during pulping of ton pulp is reduced; the advantage of greatly reducing the amount of wood pulp used, but it still does not solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and provides a high-strength multilayer kraft liner board which has high utilization degree of waste paper fibers and low production cost.
The utility model provides a high strength multilayer kraft box cardboard, includes surface course and bottom, still be equipped with at least one deck sandwich layer between surface course and the bottom, the surface course is kept away from sandwich layer one side surface coating and is had positive sizing agent, sandwich layer one side surface coating is kept away from to the bottom has back sizing agent.
In the above-mentioned high strength multi-ply kraft liner board, the core layer has one and only one ply, or the core layer has 2 to 3 plies.
In the above-described high-strength multi-ply kraft liner board, the face layer includes long fibers.
In the above high-strength multi-ply kraft liner board, the long fibers have a fiber length of 2.0 to 3.5 mm.
In the above-described high strength multi-ply kraft liner board, the core layer includes short fibers.
In the above high-strength multi-ply kraft liner board, the short fibers have a fiber length of 0.8 to 1.1 mm.
In the above-described high strength multi-ply kraft liner board, the bottom ply includes a middle fiber.
In the above high-strength multi-ply kraft liner board, the fiber length of the middle fiber is 1.1 to 2.0 mm.
In the high-strength multilayer kraft liner board, the surface layer and the core layer are bonded by an internal sizing agent, and the core layer and the bottom layer are bonded by an internal sizing agent.
In the above-mentioned high-strength multi-ply kraft liner board, the internal sizing agent includes an alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1.
Compared with the prior art, the utility model has the advantages that:
1. the utility model adopts a multilayer structure, simultaneously adopts a fiber grading technology to grade the waste paper into long fibers, medium fibers and short fibers, and respectively takes the long fibers, the medium fibers and the short fibers as main components to form a surface layer, a bottom layer and a core layer of the paper board, thereby optimizing the structural composition of the paper board, more fully utilizing the value of the waste paper fibers and reducing the production cost.
2. The internal sizing agent used in the utility model comprises at least 1 component of alkyl ketene dimer and sodium carboxymethyl cellulose, and has stronger interlayer bonding strength compared with the technical scheme of simply adopting starch in the prior art.
3. The paper making process has the advantages that the internal water resisting agent is added into the paper making primary pulp, the surface sizing is carried out after the squeezing and the dewatering, the double water resistance enables the prepared paper board to have better water resistance, and meanwhile, the reinforcing agent is added into the paper making primary pulp, so that the strength of the prepared paper board is improved.
4. The manufacturing method is simple, and meanwhile, the process is simple, convenient and controllable, and the production cost is lower.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a product obtained by the method described in comparative example 8;
in the figure: the paper board comprises a surface layer 1, a core layer 2, a bottom layer 3, a front sizing layer 4, a back sizing layer 5 and a paper board main body 6.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1
The embodiment provides a method for preparing a high-strength multilayer kraft box paperboard, which comprises the following steps as shown in fig. 1:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass of 80: 20, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp in parts by mass of 80: 20 to obtain pulp for a core layer, wherein the medium fiber pulp and the short fiber pulp are mixed uniformly according to the mass part ratio of 80: 20 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking absolutely dry pulp, and the addition amount of the water-resistant agent in the pulp is 80kg per ton of papermaking absolutely dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing surface sizing agents on the surfaces of the surface layer 1 and the bottom layer 3 to form a front sizing layer 4 and a back sizing layer 5;
step five: and drying, press polishing and reeling to obtain a finished paperboard.
Wherein the internal sizing agent comprises alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1; the reinforcing agent comprises polyacrylamide; the intra-slurry water repellent agent comprises 2 parts by mass of dodecenyl succinic anhydride, 20 parts by mass of zinc chloride and 40 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent comprises 5 parts of melamine formaldehyde resin, 20 parts of rosin gum and 6 parts of paraffin wax.
Example 2
The embodiment provides a method for preparing a high-strength multilayer kraft box paperboard, which comprises the following steps as shown in fig. 1:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass of 90: 10, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp in parts by mass of 85: 15 to obtain pulp for a core layer, wherein the pulp for the middle fiber and the pulp for the short fiber are mixed uniformly according to the mass part ratio of 85: 15 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking absolutely dry pulp, and the addition amount of the water-resistant agent in the pulp is 80kg per ton of papermaking absolutely dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing surface sizing agents on the surfaces of the surface layer 1 and the bottom layer 3 to form a front sizing layer 4 and a back sizing layer 5;
step five: drying, press polishing and coiling to obtain the finished product paperboard.
Wherein the internal sizing agent comprises alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1; the reinforcing agent comprises polyacrylamide; the intra-slurry water repellent agent comprises 8 parts by mass of dodecenyl succinic anhydride, 10 parts by mass of zinc chloride and 20 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent comprises 15 parts of melamine formaldehyde resin, 10 parts of rosin gum and 2 parts of paraffin wax.
Example 3
The embodiment provides a method for preparing a high-strength multilayer kraft box paperboard, which comprises the following steps as shown in fig. 1:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass of 85: 15, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp according to the mass part ratio of 83: 17 to obtain pulp for a core layer, wherein the pulp for the middle fiber and the pulp for the short fiber are mixed uniformly according to the mass part ratio of 82: 18 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking absolutely dry pulp, and the addition amount of the water-resistant agent in the pulp is 80kg per ton of papermaking absolutely dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing surface sizing agents on the surfaces of the surface layer 1 and the bottom layer 3 to form a front sizing layer 4 and a back sizing layer 5;
step five: and drying, press polishing and reeling to obtain a finished paperboard.
Wherein the internal sizing agent comprises alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1; the reinforcing agent comprises polyacrylamide; the intra-slurry water repellent agent comprises 5 parts by mass of dodecenyl succinic anhydride, 15 parts by mass of zinc chloride and 30 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent comprises 10 parts of melamine formaldehyde resin, 15 parts of rosin gum and 4 parts of paraffin wax.
Example 4
The embodiment provides a high-strength multilayer kraft box board, as shown in fig. 1, comprising a surface layer 1 and a bottom layer 3, and at least one core layer 2 between the surface layer 1 and the bottom layer 3, preferably, the core layer 2 has only one layer, or the core layer 2 has 2-3 layers. The surface layer 1 is far away from 2 side surface coating of sandwich layer and has a front sizing layer 4, the bottom layer 3 is far away from 2 side surface coating of sandwich layer and has a back sizing layer 5. The surface layer 1 comprises long fibers with the fiber length of 2.0-3.5 mm; the core layer 2 comprises short fibers with the fiber length of 0.8-1.1 mm; the bottom layer 3 comprises medium fibers with the fiber length of 1.1-2.0 mm.
That is, the surface layer 1 mainly contains long fibers having a fiber length of 2.0 to 3.5mm, the core layer 2 mainly contains short fibers having a fiber length of 0.8 to 1.1mm, and the bottom layer 3 mainly contains medium fibers having a fiber length of 1.1 to 2.0 mm. The utility model adopts a multilayer structure, simultaneously adopts a fiber grading technology to grade the waste paper into long fibers, medium fibers and short fibers, and respectively takes the long fibers, the medium fibers and the short fibers as main components to form the surface layer 1, the bottom layer 3 and the core layer 2 of the paperboard, thereby optimizing the structural composition of the paperboard, more fully utilizing the value of the waste paper fibers, improving the strength and reducing the production cost.
Comparative example 1
This comparative example provides a method of making a high strength multi-ply kraft liner board, as shown in figure 1, comprising the steps of:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass of 85: 15, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp according to the mass part ratio of 83: 17 to obtain pulp for a core layer, wherein the pulp for the middle fiber and the pulp for the short fiber are mixed uniformly according to the mass part ratio of 82: 18 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking absolutely dry pulp, and the addition amount of the water-resistant agent in the pulp is 80kg per ton of papermaking absolutely dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing surface sizing agents on the surfaces of the surface layer 1 and the bottom layer 3 to form a front sizing layer 4 and a back sizing layer 5;
step five: drying, press polishing and coiling to obtain the finished product paperboard.
Wherein the internal sizing agent comprises alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1; the enhancer comprises starch; the intra-slurry water repellent agent comprises 5 parts by mass of dodecenyl succinic anhydride, 15 parts by mass of zinc chloride and 30 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent comprises 10 parts of melamine formaldehyde resin, 15 parts of rosin gum and 4 parts of paraffin wax.
Comparative example 2
This comparative example provides a method of making a high strength multi-ply kraft liner board, as shown in figure 1, comprising the steps of:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass of 85: 15, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp according to the mass part ratio of 83: 17 to obtain pulp for a core layer, wherein the pulp for the middle fiber and the pulp for the short fiber are mixed uniformly according to the mass part ratio of 82: 18 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking absolutely dry pulp, and the addition amount of the water-resistant agent in the pulp is 80kg per ton of papermaking absolutely dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing surface sizing agents on the surfaces of the surface layer 1 and the bottom layer 3 to form a front sizing layer 4 and a back sizing layer 5;
step five: and drying, press polishing and reeling to obtain a finished paperboard.
Wherein the internal sizing agent comprises alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1; the reinforcing agent comprises polyacrylamide; the intra-slurry water repellent agent comprises 15 parts by mass of zinc chloride and 30 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent comprises 10 parts of melamine formaldehyde resin, 15 parts of rosin gum and 4 parts of paraffin wax.
Comparative example 3
This comparative example provides a method of making a high strength multi-ply kraft liner board, as shown in figure 1, comprising the steps of:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass of 85: 15, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp according to the mass part ratio of 83: 17 to obtain pulp for a core layer, wherein the pulp for the middle fiber and the pulp for the short fiber are mixed uniformly according to the mass part ratio of 82: 18 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking absolutely dry pulp, and the addition amount of the water-resistant agent in the pulp is 80kg per ton of papermaking absolutely dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing surface sizing agents on the surfaces of the surface layer 1 and the bottom layer 3 to form a front sizing layer 4 and a back sizing layer 5;
step five: and drying, press polishing and reeling to obtain a finished paperboard.
Wherein the internal sizing agent comprises alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1; the reinforcing agent comprises polyacrylamide; the intra-slurry water repellent agent comprises 5 parts by mass of dodecenyl succinic anhydride and 30 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent comprises 10 parts of melamine formaldehyde resin, 15 parts of rosin gum and 4 parts of paraffin wax.
Comparative example 4
This comparative example provides a method of making a high strength multi-ply kraft liner board, as shown in figure 1, comprising the steps of:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass of 85: 15, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp according to the mass part ratio of 83: 17 to obtain pulp for a core layer, wherein the pulp for the middle fiber and the pulp for the short fiber are mixed uniformly according to the mass part ratio of 82: 18 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking absolutely dry pulp, and the addition amount of the water-resistant agent in the pulp is 80kg per ton of papermaking absolutely dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing the surface sizing agent on the surfaces of the surface layer 1 and the bottom layer 3 to respectively form a front sizing layer 4 and a back sizing layer 5;
step five: and drying, press polishing and reeling to obtain a finished paperboard.
Wherein the internal sizing agent comprises alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1; the reinforcing agent comprises polyacrylamide; the water repellent agent in the slurry comprises 5 parts by mass of dodecenyl succinic anhydride and 15 parts by mass of zinc chloride; the surface sizing agent comprises 10 parts of melamine formaldehyde resin, 15 parts of rosin gum and 4 parts of paraffin wax.
Comparative example 5
This comparative example provides a method of making a high strength multi-ply kraft liner board, as shown in figure 1, comprising the steps of:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass of 85: 15, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp according to the mass part ratio of 83: 17 to obtain pulp for a core layer, wherein the pulp for the middle fiber and the pulp for the short fiber are mixed uniformly according to the mass part ratio of 82: 18 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking absolutely dry pulp, and the addition amount of the water-resistant agent in the pulp is 80kg per ton of papermaking absolutely dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing the surface sizing agent on the surfaces of the surface layer 1 and the bottom layer 3 to respectively form a front sizing layer 4 and a back sizing layer 5;
step five: and drying, press polishing and reeling to obtain a finished paperboard.
Wherein the internal sizing agent comprises alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1; the reinforcing agent comprises polyacrylamide; the intra-slurry water repellent agent comprises 5 parts by mass of dodecenyl succinic anhydride, 15 parts by mass of zinc chloride and 30 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent includes 15 parts of rosin gum and 4 parts of paraffin wax.
Comparative example 6
This comparative example provides a method of making a high strength multi-ply kraft liner board, as shown in figure 1, comprising the steps of:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass as follows: 15, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp according to the mass part ratio of 83: 17 to obtain pulp for a core layer, wherein the pulp for the middle fiber and the pulp for the short fiber are mixed uniformly according to the mass part ratio of 82: 18 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking oven dry pulp, and the addition amount of the water repellent agent in the pulp is 80kg per ton of papermaking oven dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing surface sizing agents on the surfaces of the surface layer 1 and the bottom layer 3 to form a front sizing layer 4 and a back sizing layer 5;
step five: and drying, press polishing and reeling to obtain a finished paperboard.
Wherein the internal sizing agent comprises alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1; the reinforcing agent comprises polyacrylamide; the intra-slurry water repellent agent comprises 5 parts by mass of dodecenyl succinic anhydride, 15 parts by mass of zinc chloride and 30 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent comprises 10 parts of melamine formaldehyde resin and 4 parts of paraffin wax.
Comparative example 7
This comparative example provides a method of making a high strength multi-ply kraft liner board, as shown in figure 1, comprising the steps of:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass of 85: 15, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp according to the mass part ratio of 83: 17 to obtain pulp for a core layer, wherein the pulp for the middle fiber and the pulp for the short fiber are mixed uniformly according to the mass part ratio of 82: 18 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking absolutely dry pulp, and the addition amount of the water-resistant agent in the pulp is 80kg per ton of papermaking absolutely dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing the surface sizing agent on the surfaces of the surface layer 1 and the bottom layer 3 to respectively form a front sizing layer 4 and a back sizing layer 5;
step five: and drying, press polishing and reeling to obtain a finished paperboard.
Wherein the internal sizing agent comprises alkyl ketene dimer and sodium carboxymethyl cellulose in a mass ratio of 3: 1; the reinforcing agent comprises polyacrylamide; the intra-slurry water repellent agent comprises 5 parts by mass of dodecenyl succinic anhydride, 15 parts by mass of zinc chloride and 30 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent comprises 10 parts of melamine formaldehyde resin and 15 parts of rosin size.
Comparative example 8
This comparative example provides a method of making a high strength multi-ply kraft liner board, as shown in figure 2, comprising the steps of:
the method comprises the following steps: using waste paper as a raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen to obtain papermaking raw pulp;
step two: adding a reinforcing agent and an in-pulp water-repellent agent into the papermaking raw pulp, and uniformly mixing, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking oven-dried pulp, and the addition amount of the in-pulp water-repellent agent is 80kg per ton of papermaking oven-dried pulp;
step three: filtering and papermaking the papermaking raw stock obtained in the step two through a forming net part of a paper machine to form wet paper sheets, squeezing, dehydrating and drying to obtain a paper board main body 6;
step four: respectively sizing surface sizing agents to two surfaces of a paperboard main body 6 to respectively form a front sizing layer 4 and a back sizing layer 5;
step five: and drying, press polishing and reeling to obtain a finished paperboard.
Wherein the reinforcing agent comprises polyacrylamide; the intra-slurry water repellent agent comprises 5 parts by mass of dodecenyl succinic anhydride, 15 parts by mass of zinc chloride and 30 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent comprises 10 parts of melamine formaldehyde resin, 15 parts of rosin gum and 4 parts of paraffin wax.
Comparative example 9
The embodiment provides a method for preparing a high-strength multilayer kraft paper board, as shown in fig. 1, comprising the following steps:
the method comprises the following steps: using waste paper as raw material, pulping by a hydrapulper, removing slag and impurities by a coarse screen, feeding the pulp into a fiber grading screen, and screening to obtain long fiber pulp with the fiber length of 2.0-3.5mm, medium fiber pulp with the fiber length of 1.1-2.0mm and short fiber pulp with the fiber length of 0.8-1.1 mm;
step two: the method comprises the following steps of mixing long fiber pulp and short fiber pulp in parts by mass of 85: 15, adding a reinforcing agent and an in-pulp water repellent agent, uniformly mixing to obtain surface layer pulp, and mixing the short fiber pulp and the medium fiber pulp according to the mass part ratio of 83: 17 to obtain pulp for a core layer, wherein the pulp for the middle fiber and the pulp for the short fiber are mixed uniformly according to the mass part ratio of 82: 18 to obtain bottom layer pulp, wherein the addition amount of the reinforcing agent is 20kg per ton of papermaking absolutely dry pulp, and the addition amount of the water-resistant agent in the pulp is 80kg per ton of papermaking absolutely dry pulp;
step three: adding an internal sizing agent into the surface layer pulp, the core layer pulp and the lower bottom layer pulp obtained in the step two, filtering, papermaking and compounding the surface layer pulp, the core layer pulp and the bottom layer pulp through a forming wire part of a paper machine to form a wet paper sheet containing a surface layer 1, a core layer 2 and a bottom layer 3, and pressing, dehydrating and drying the wet paper sheet to obtain a dry paper sheet;
step four: respectively sizing surface sizing agents on the surfaces of the surface layer 1 and the bottom layer 3 to form a front sizing layer 4 and a back sizing layer 5;
step five: and drying, press polishing and reeling to obtain a finished paperboard.
Wherein the internal sizing agent is starch; the reinforcing agent comprises polyacrylamide; the intra-slurry water repellent agent comprises 5 parts by mass of dodecenyl succinic anhydride, 15 parts by mass of zinc chloride and 30 parts by mass of polyamide epichlorohydrin resin; the surface sizing agent comprises 10 parts of melamine formaldehyde resin, 15 parts of rosin gum and 4 parts of paraffin wax.
Application example 1
The same lot of waste paper was taken and divided into 10 parts by equal mass, and by the methods described in example 3, comparative example 1, comparative example 2, comparative example 3, comparative example 4, comparative example 5, comparative example 6, comparative example 7, comparative example 8 and comparative example 9, respectively (the total mass of the interlayer adhesive used in each experimental group was equal), the paperboards 1 to 10 were produced, and the basis weight, the tightness, the bursting index, the transverse folding resistance, the transverse ring crush index, the front water absorbency and the interlayer bonding strength of the paperboards 1 to 10 were measured, respectively, and the results are shown in the following table:
and (4) analyzing results: comparing the detection data of the paper board 1 and the paper boards 2-10, the paper board prepared by the preparation method provided by the utility model has more excellent performance, and the expected purpose of the utility model is achieved.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.
Although the terms face layer 1, core layer 2, bottom layer 3, front side size layer 4, back side size layer 5, paperboard body 6, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (3)
1. The utility model provides a high strength multilayer kraft paper board which characterized in that: the adhesive tape comprises a surface layer (1) and a bottom layer (3), wherein at least one core layer (2) is arranged between the surface layer (1) and the bottom layer (3), a front-surface sizing layer (4) is coated on the surface of one side, far away from the core layer (2), of the surface layer (1), and a back-surface sizing layer (5) is coated on the surface of one side, far away from the core layer (2), of the bottom layer (3);
the surface layer (1) comprises long fibers, and the fiber length of the long fibers is 2.0-3.5 mm;
the core layer (2) comprises short fibers, and the fiber length of the short fibers is 0.8-1.1 mm;
the bottom layer (3) comprises middle fibers, and the fiber length of the middle fibers is 1.1-2.0 mm.
2. The high strength multi-ply kraft liner board according to claim 1, wherein: the core layer (2) has only one layer, or the core layer (2) has 2-3 layers.
3. The high strength multi-ply kraft liner board according to claim 1, wherein: the surface layer (1) and the core layer (2) are bonded through an internal sizing agent, and the core layer (2) and the bottom layer (3) are bonded through the internal sizing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120717082.7U CN216663635U (en) | 2021-04-08 | 2021-04-08 | High-strength multilayer kraft box paperboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120717082.7U CN216663635U (en) | 2021-04-08 | 2021-04-08 | High-strength multilayer kraft box paperboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216663635U true CN216663635U (en) | 2022-06-03 |
Family
ID=81758736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120717082.7U Active CN216663635U (en) | 2021-04-08 | 2021-04-08 | High-strength multilayer kraft box paperboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216663635U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073499A (en) * | 2021-04-08 | 2021-07-06 | 浙江山鹰纸业有限公司 | High-strength multilayer kraft liner board and preparation method thereof |
-
2021
- 2021-04-08 CN CN202120717082.7U patent/CN216663635U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073499A (en) * | 2021-04-08 | 2021-07-06 | 浙江山鹰纸业有限公司 | High-strength multilayer kraft liner board and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113073498B (en) | High-burst multilayer cowhide cardboard paper and preparation method thereof | |
| CN110080031B (en) | Production process of special core paper for compounding high-grade gray board paper | |
| CN102212983B (en) | High-intensity environment-friendly craft paper and manufacturing method thereof | |
| US4959272A (en) | Gypsum wallboard paper having imitation manila colored coating | |
| CN102677549B (en) | Environment-friendly coated white board | |
| CN102979008B (en) | Raw paper, preparation method thereof, and craft paper | |
| US5080758A (en) | Chemi-mechanical liner board | |
| WO2009077001A1 (en) | Method for pulp preparation and pulp treatment and a paper, especially a tissue paper | |
| CN216663635U (en) | High-strength multilayer kraft box paperboard | |
| CN112878089A (en) | Preparation method of high-breaking-resistance kraft paper | |
| CN113235324A (en) | Paperboard, production method thereof and cigarette packet box | |
| WO2008003343A1 (en) | Method of making an absorbent structure as a multi layer paper, especially a tissue paper | |
| CN111979815A (en) | Preparation method of moisture regain-resistant, delamination-resistant and high-strength environment-friendly kraft liner cardboard paper | |
| CN113073499A (en) | High-strength multilayer kraft liner board and preparation method thereof | |
| CN216663636U (en) | High-breaking-resistance multilayer kraft cardboard paper | |
| CN107964825B (en) | Raw paper of carton paper with low gram weight and production method and application thereof | |
| CN112064421B (en) | Dyed grey board paper and production process thereof | |
| CN110593010B (en) | Preparation method of corrugated base paper | |
| CN111235940A (en) | Preparation method of core layer slurry, base paper, paperboard and paper machine | |
| CN206157474U (en) | Fine flour craft paper | |
| JP4688723B2 (en) | Multilayer structure liner and method for producing the same | |
| CN114561833A (en) | Production method of single-layer white pulp fine dried noodle white-surface kraft liner board | |
| CN101760988A (en) | Mixed pulp material and cultural paper prepared from the same | |
| CN115094682A (en) | High-grade craft paper and preparation method thereof | |
| CN214992687U (en) | White coated craft paper with high strength and high printability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |