CN116607355A - High bulk food card paper - Google Patents
High bulk food card paper Download PDFInfo
- Publication number
- CN116607355A CN116607355A CN202310727083.3A CN202310727083A CN116607355A CN 116607355 A CN116607355 A CN 116607355A CN 202310727083 A CN202310727083 A CN 202310727083A CN 116607355 A CN116607355 A CN 116607355A
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- China
- Prior art keywords
- slurry
- layer
- pulp
- nbkp
- core layer
- 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.)
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Links
- 239000002002 slurry Substances 0.000 claims abstract description 94
- 239000012792 core layer Substances 0.000 claims abstract description 48
- 239000010410 layer Substances 0.000 claims abstract description 32
- 239000002344 surface layer Substances 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 239000000123 paper Substances 0.000 claims abstract description 18
- 239000011087 paperboard Substances 0.000 claims abstract description 11
- 238000012546 transfer Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000011111 cardboard Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000007373 indentation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The application discloses a high-bulk food card paper, which comprises a surface layer, a core layer and a bottom layer; the surface layer comprises the following raw materials in percentage by mass: 20-25% of NBKP slurry and 75-80% of LBKP slurry; the core layer comprises the following raw materials in percentage by mass: 8-12% of NBKP slurry, 12-16% of LBKP slurry and 72-76% of BCTMP slurry; the bottom layer comprises the following raw materials in percentage by mass: 30-35% of NBKP slurry and 65-70% of LBKP slurry. The high-bulk food paperboard provided by the application has obviously improved bulk and folding endurance, and meets the market demand for the high-bulk food paperboard.
Description
Technical Field
The application relates to the technical field of papermaking, in particular to a high-bulk food paperboard.
Background
The paperboard is required to be subjected to mechanical procedures such as indentation, die cutting, curling and the like when being used for manufacturing food packaging boxes and cold and hot drinking cup containers, and the problems of bursting and layering at the indentation, folding and curling of paper easily occur, so that the procedures have quite high requirements on the bulk index of the food paperboard. The food cardboard in the prior art has the common bulk and is easy to burst in the actual processing process. In view of the technical problems, the application improves the aspects of raw materials, technology and the like, and provides the high-bulk food paperboard which meets the market demand for the high-bulk food paperboard.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present application aims to provide a food jam with high bulk, which aims to solve the technical problem that the bulk of the food jam is to be improved in the prior art.
In order to achieve the above purpose, the application adopts the following technical scheme:
a high bulk food cardboard comprises a surface layer, a core layer and a bottom layer; the surface layer comprises the following raw materials in percentage by mass: 20-25% of NBKP slurry and 75-80% of LBKP slurry; the core layer comprises the following raw materials in percentage by mass: 8-12% of NBKP slurry, 12-16% of LBKP slurry and 72-76% of BCTMP slurry; the bottom layer comprises the following raw materials in percentage by mass: 30-35% of NBKP slurry and 65-70% of LBKP slurry.
Further, the bulk of the BCTMP slurry ranges from 2.6 cm3/g to 2.8cm3/g.
Further, the slurry prepared from NBKP slurry and the slurry prepared from LBKP slurry enter a surface layer streaming system to prepare a surface layer, and the slurry prepared from NBKP slurry, the slurry prepared from LBKP slurry and the slurry prepared from BCTMP slurry enter a core layer streaming system to prepare a core layer; the slurry prepared from NBKP slurry and the slurry prepared from LBKP slurry enter a bottom layer streaming system to prepare a bottom layer; the opening range of the head box lip of the surface layer streaming system is 13-14 mm, the opening range of the head box lip of the core layer streaming system is 13-14 mm, and the opening range of the head box lip of the bottom layer streaming system is 13-14 mm.
Further, the NBKP slurry used for the core layer is refined slurry, and the freeness range is 180-220 CSF.
Further, after the surface layer streaming system is used for manufacturing the surface layer, the core layer manufactured by the core layer streaming system and the bottom layer manufactured by the bottom layer streaming system are sent to the net part for molding, the finished paper is obtained through the pressing part, the front drying part, the coating machine, the rear drying part, the calender and the coiling machine in sequence.
Further, the press section includes two shoe presses arranged in series.
Further, the coater is a film transfer coater.
The beneficial effects are that: the application provides a high-bulk food paperboard, which comprises 20-25% of NBKP slurry in a surface layer raw material and 30-35% of NBKP slurry in a bottom layer raw material, and improves the overall folding endurance of paper. Further, the core layer adopts NBKP refined pulp, the freeness of the NBKP refined pulp is controlled to be 180-220CSF, the binding force between the fibers of the core layer is further improved, and the problem that the ultra-high loose food jam is easy to delaminate is solved. The ratio of BCTMP pulp in the core layer raw material is 72-76%, and the bulk range of the BCTMP pulp is controlled to be 2.6-2.8 cm 3 And/g, the bulk of the food jam is further improved.
Drawings
Fig. 1 is a block diagram of a system for producing a high bulk food jam according to the present application.
Description of the embodiments
The application provides a high bulk food jam, which is further described in detail below for the purpose, technical scheme and effect of the application to be clearer and clearer. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The application provides a high bulk food jam. The drawing is a schematic block diagram of a production system for high bulk food jams, with only the main equipment schematically shown.
A high bulk food cardboard comprises a surface layer, a core layer and a bottom layer; the surface layer comprises the following raw materials in percentage by mass: 20-25% of NBKP slurry and 75-80% of LBKP slurry; the core layer comprises the following raw materials in percentage by mass: 8-12% of NBKP slurry, 12-16% of LBKP slurry and 72-76% of BCTMP slurry; the bottom layer comprises the following raw materials in percentage by mass: 30-35% of NBKP slurry and 65-70% of LBKP slurry.
Preferably, the bulk of the BCTMP slurry is in the range of 2.6 cm to 2.8cm 3 And/g. Because the BCTMP occupies larger volume in the raw material of the high-bulk food card paper core layer, the BCTMP has the largest influence on the bulk of the core layer and the whole paper, and therefore, the bulk of the raw material of the BCTMP is controlled in a higher range, which is beneficial to improving the bulk of the finally prepared food card paper.
Further, the slurry prepared from NBKP slurry and the slurry prepared from LBKP slurry enter a surface layer streaming system to prepare a surface layer, and the slurry prepared from NBKP slurry, the slurry prepared from LBKP slurry and the slurry prepared from BCTMP slurry enter a core layer streaming system to prepare a core layer; the slurry prepared from NBKP slurry and the slurry prepared from LBKP slurry enter a bottom layer streaming system to prepare a bottom layer; the opening range of the head box lip of the surface layer streaming system is 13-14 mm, the opening range of the head box lip of the core layer streaming system is 13-14 mm, and the opening range of the head box lip of the bottom layer streaming system is 13-14 mm. The opening range of each flow box lip plate is limited to 13-14 mm, so that normal production is guaranteed, meanwhile, severe dehydration of slurry in a net part is slowed down, loss of a fine fiber component in the net part is reduced, the retention rate of fine fibers in the net part is improved, the binding force of each layer of fibers is effectively improved, and the problem of layering quality of paper generated after high-bulk BCTMP slurry is added is avoided.
During actual pulping, the NBKP slurry used for the core layer is refined pulp, and the freeness range of the NBKP slurry is 180-220 CSF. The ultra-low freeness beating fine grinding process achieves full fiber-separating and brooming of the NBKP slurry of the core layer, effectively increases the proportion of fine fiber components of the core layer, effectively improves the fiber binding force between the surface layer and the core layer and between the core layer and the bottom layer, and reduces the problem that the food card paper is easy to be layered.
Further, after the surface layer streaming system is used for manufacturing the surface layer, the core layer manufactured by the core layer streaming system and the bottom layer manufactured by the bottom layer streaming system are sent to the net part for molding, the finished paper is obtained through the pressing part, the front drying part, the coating machine, the rear drying part, the calender and the coiling machine in sequence.
Further, the press section includes two shoe presses arranged in series. This arrangement ensures that the paper has sufficient residence time in the press section to achieve a strong dewatering effect and reduce the loss of food jam thickness.
Further, the coater is a film transfer coater.
For ease of understanding, the following will be used to produce 210g/m 2 Is further illustrated by the examples of several groups. The raw material ratios of 3 sets of examples and 2 sets of comparative examples are listed below.
The steps of the various embodiments are briefly described below. As shown in fig. 1, the main steps of each embodiment are the same, and the steps of each embodiment are not separately and repeatedly described in the following description.
(1) NBKP slurry line prepares NBKP slurry raw material into NBKP slurry, and NBKP slurry for a core layer is prepared into NBKP fine grinding slurry; the LBKP slurry line prepares LBKP slurry material into LBKP slurry, and the BCTMP slurry line prepares BCTMP slurry material into BCTMP slurry.
(2) NBKP slurry and LBKP are made into a surface layer in a surface layer streaming system; refining NBKP slurry and LBKP slurry, and conveying the NBKP slurry and the BCTMP slurry in a core layer flow system to form a core layer; NBKP slurry and LBKP make the material into the substrate in the substrate flow system.
(3) The surface layer, the core layer and the bottom layer enter a net part for molding, then pass through a pressing part, a front drying part, a coating machine, a thick drying part and a calender in sequence, and finally are rolled up by a coiling machine.
In examples 1 to 3, the bulk of the BCTMP slurry was controlled to be in the range of 2.6 to 2.8cm 3 And/g, the NBKP slurry used for the core layer is refined slurry, the freeness range of the NBKP slurry is controlled to be 180-220CSF, and the opening ranges of the flow box lips of the surface layer flow system, the core layer flow system and the bottom layer flow system are all controlled to be 13-14 mm. For other conventional papermaking aids, no limitation is made herein as it is irrelevant to the point of the application.
The bulk test and the folding endurance test were performed on the food jams obtained in the above 3 groups of examples and 2 groups of comparative examples, respectively. The bulk test standard is GB/T451.3/ISO534 and the folding endurance test standard is GB/T457-2008. The test results are as follows.
| Examples | Bulk (cm) 3 /g） | Folding endurance (secondary) |
| Comparative example A | 1.40 | 40 |
| Comparative example B | 1.60 | 56 |
| Example 1 | 1.71 | 68 |
| Example 2 | 1.66 | 60 |
| Example 3 | 1.68 | 65 |
According to the analysis, the high-bulk food paperboard provided by the application has the advantages that the proportion of NBKP pulp in the surface layer raw material is 20-25%, the proportion of NBKP pulp in the bottom layer raw material is 30-35%, the overall folding endurance of paper is improved, and the bursting problem caused by mechanical procedures such as indentation, die cutting and curling of food-grade paperboard and paper cup base paper is reduced. The core layer adopts NBKP fine grinding slurry, effectively improves the surface layer and the core layer, and the core layer and the bottom layerFiber bonding force between the two. In addition, the freeness of the NBKP refined pulp is controlled to be 180-220CSF, so that the binding force between core layer fibers is further improved, and the problem that the ultrahigh-loose food card paper is easy to delaminate is solved. The ratio of the BCTMP pulp in the core layer raw material is 72-76%, the bulk of the whole paper is greatly influenced, and the bulk range of the BCTMP pulp is controlled to be 2.6-2.8 cm 3 And/g, the bulk of the food jam is further improved.
It will be understood that equivalents and modifications will occur to those skilled in the art based on the present application and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present application.
Claims (7)
1. The high-bulk food paperboard is characterized by comprising a surface layer, a core layer and a bottom layer;
the surface layer comprises the following raw materials in percentage by mass: 20-25% of NBKP slurry and 75-80% of LBKP slurry;
the core layer comprises the following raw materials in percentage by mass: 8-12% of NBKP slurry, 12-16% of LBKP slurry and 72-76% of BCTMP slurry;
the bottom layer comprises the following raw materials in percentage by mass: 30-35% of NBKP slurry and 65-70% of LBKP slurry.
2. The high bulk food card of claim 1 wherein the bulk of the BCTMP pulp ranges from 2.6 cm to 2.8cm 3 /g。
3. The high bulk food card of claim 1 wherein the pulp of NBKP pulp and the pulp of LBKP pulp enter a facing layer flow system to form a facing layer, and the pulp of NBKP pulp, the pulp of LBKP pulp, and the pulp of BCTMP pulp enter a core layer flow system to form a core layer; the slurry prepared from NBKP slurry and the slurry prepared from LBKP slurry enter a bottom layer streaming system to prepare a bottom layer; the opening range of the head box lip of the surface layer streaming system is 13-14 mm, the opening range of the head box lip of the core layer streaming system is 13-14 mm, and the opening range of the head box lip of the bottom layer streaming system is 13-14 mm.
4. A high bulk food jam according to claim 3, wherein the NBKP slurry for the core layer is a refined pulp having a freeness in the range 180 to 220csf.
5. A high bulk food card according to claim 3, wherein the finished paper is obtained by passing the surface layer, the core layer and the bottom layer through the press section, the front dryer section, the coater, the rear dryer section, the calender and the reel-up in this order after the surface layer, the core layer and the bottom layer are formed by the surface layer and the core layer are formed by the surface layer and the bottom layer are formed by the surface layer and the core layer.
6. The high bulk food jam of claim 5 wherein said press section includes two shoe presses arranged in series.
7. The high bulk food card of claim 5 wherein the coater is a film transfer coater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310727083.3A CN116607355A (en) | 2023-06-19 | 2023-06-19 | High bulk food card paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310727083.3A CN116607355A (en) | 2023-06-19 | 2023-06-19 | High bulk food card paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116607355A true CN116607355A (en) | 2023-08-18 |
Family
ID=87685509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310727083.3A Pending CN116607355A (en) | 2023-06-19 | 2023-06-19 | High bulk food card paper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116607355A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518002A (en) * | 2011-12-30 | 2012-06-27 | 珠海华丰纸业有限公司 | High-bulk coating white cardboard and production process thereof |
| CN104562828A (en) * | 2015-01-14 | 2015-04-29 | 珠海华丰纸业有限公司 | Ultrahigh-loose thickness noodle bowl paper and production process thereof |
| CN104911942A (en) * | 2015-07-14 | 2015-09-16 | 广西金桂浆纸业有限公司 | Manufacturing process of ultrahigh bulk paper cup raw paper |
| CN106835810A (en) * | 2017-03-28 | 2017-06-13 | 广西金桂浆纸业有限公司 | The manufacture craft of high bulk cupstock |
| CN111101402A (en) * | 2019-12-12 | 2020-05-05 | 宁波亚洲浆纸业有限公司 | Food cardboard and preparation method thereof |
| CN111139690A (en) * | 2019-12-30 | 2020-05-12 | 宁波亚洲浆纸业有限公司 | Core layer slurry for packaging paperboard and packaging paperboard |
| CN115976883A (en) * | 2022-12-27 | 2023-04-18 | 宁波亚洲浆纸业有限公司 | Preparation method of food cardboard and food cardboard |
-
2023
- 2023-06-19 CN CN202310727083.3A patent/CN116607355A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518002A (en) * | 2011-12-30 | 2012-06-27 | 珠海华丰纸业有限公司 | High-bulk coating white cardboard and production process thereof |
| CN104562828A (en) * | 2015-01-14 | 2015-04-29 | 珠海华丰纸业有限公司 | Ultrahigh-loose thickness noodle bowl paper and production process thereof |
| CN104911942A (en) * | 2015-07-14 | 2015-09-16 | 广西金桂浆纸业有限公司 | Manufacturing process of ultrahigh bulk paper cup raw paper |
| CN106835810A (en) * | 2017-03-28 | 2017-06-13 | 广西金桂浆纸业有限公司 | The manufacture craft of high bulk cupstock |
| CN111101402A (en) * | 2019-12-12 | 2020-05-05 | 宁波亚洲浆纸业有限公司 | Food cardboard and preparation method thereof |
| CN111139690A (en) * | 2019-12-30 | 2020-05-12 | 宁波亚洲浆纸业有限公司 | Core layer slurry for packaging paperboard and packaging paperboard |
| CN115976883A (en) * | 2022-12-27 | 2023-04-18 | 宁波亚洲浆纸业有限公司 | Preparation method of food cardboard and food cardboard |
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