CN113818277A - Preparation process and formula of washable white cardboard - Google Patents
Preparation process and formula of washable white cardboard Download PDFInfo
- Publication number
- CN113818277A CN113818277A CN202110535905.9A CN202110535905A CN113818277A CN 113818277 A CN113818277 A CN 113818277A CN 202110535905 A CN202110535905 A CN 202110535905A CN 113818277 A CN113818277 A CN 113818277A
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- pulp
- core
- white cardboard
- layer
- paper
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- 238000002360 preparation method Methods 0.000 title claims description 6
- 239000000835 fiber Substances 0.000 claims abstract description 38
- 239000000123 paper Substances 0.000 claims abstract description 37
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 26
- 229920002472 Starch Polymers 0.000 claims abstract description 21
- 235000019698 starch Nutrition 0.000 claims abstract description 21
- 239000008107 starch Substances 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 238000000227 grinding Methods 0.000 claims abstract description 16
- 239000003607 modifier Substances 0.000 claims abstract description 16
- 238000004537 pulping Methods 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 38
- 239000003292 glue Substances 0.000 claims description 15
- 239000011122 softwood Substances 0.000 claims description 14
- 239000002699 waste material Substances 0.000 claims description 11
- 239000011121 hardwood Substances 0.000 claims description 9
- 241000219000 Populus Species 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000012792 core layer Substances 0.000 claims description 5
- 235000013312 flour Nutrition 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims 2
- 230000002950 deficient Effects 0.000 abstract description 5
- 238000004513 sizing Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000012153 distilled water Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/06—Long fibres, i.e. fibres exceeding the upper length limit of conventional paper-making fibres; Filaments
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Paper (AREA)
Abstract
The invention discloses a manufacturing process and a formula of a washable and dispersible ivory board, which relate to the technical field of papermaking and comprise the following operation steps: step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine; step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp; the invention makes the white cardboard have flushability, reducible pulp property and hydrolyzability on the basis of reaching certain physical indexes by changing the proportion of the formula in the paper, the toilet paper tube core produced by the white cardboard can be directly discarded in a toilet bowl after use, the toilet bowl and a sewer can not be blocked, in addition, defective goods with the paper tube core in the toilet paper manufacturing process can be directly repulped together with the toilet paper, the cost of toilet paper manufacturing is greatly reduced, and the manufacturing efficiency is increased.
Description
Technical Field
The invention relates to a papermaking technology, in particular to a manufacturing process and a formula of a white cardboard with flushability.
Background
Most toilet paper manufacturers in the market currently use white cardboard as the raw material of the toilet paper tube core, the original physical indexes of the white cardboard are mainly required to meet the basic requirements of the toilet paper tube core, including whiteness, hardness, stiffness and environmental protection and safety of the original material, and some manufacturers use food-grade white cardboard as the raw material of the toilet paper tube core, because the production process of the toilet paper has no inevitable defective products, which are recovered from the production line and re-made into pulp to produce the toilet paper, while the paper core of the non-flushable white cardboard can not meet the production process requirements, and the paper core and the toilet paper can only be peeled manually at present.
The product with flushability is directly thrown into water, can keep the smoothness of a toilet bowl and a sewer system, is compatible with the existing sewage conveying system and treatment system, does not need to treat the wastes in an additional way, is environment-friendly and has good biodegradability, the product with reducible pulp property is directly put into a papermaking production line together with primary pulp, does not need additional treatment, has similar water solubility and solubility with the primary pulp, and the product with hydrolysable property is that the product can be decomposed after being soaked in the water for a certain time, and the decomposed substances have no pollution,
disclosure of Invention
The invention aims to provide a manufacturing process and a formula of a washable white cardboard, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a preparation process and a formula of a white cardboard with flushability are disclosed, wherein the preparation process comprises the following operation steps:
step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine;
step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp;
step three, layering and stacking the flour paste: preparing the surface pulp, the bottom pulp and the core pulp into thin layers, placing the core layer between the surface layer and the bottom layer, and extruding and combining the layers by an extruding device to form semi-finished paper;
step four, applying surface starch glue: and uniformly brushing the surface starch glue on the surface of the semi-finished paper, and cooling to obtain the white cardboard.
The components of the surface pulp and the bottom pulp comprise (40% -55%) long fiber pulp (such as softwood pulp, softwood pulp waste pulp) + (60% -45%) short fiber pulp (such as hardwood pulp, hardwood pulp waste pulp), and the core pulp comprises (30% -40%) long fiber chemi-mechanical pulp (such as softwood chemi-mechanical pulp) + (70% -60%) short fiber chemi-mechanical pulp (such as poplar chemi-mechanical pulp), surface starch glue: 20-30 kg/ton finished white cardboard, fiber modifier: 5-10 kg/ton finished white cardboard.
As a further scheme of the invention: the surface sizing layer and the bottom sizing layer in the step I: and (3) carrying out high-concentration grinding on the pulp for 30-40 ℃, and adding a fiber modifier in the second step.
As a further scheme of the invention: the temperature of the core slurry subjected to high grinding in the first step is controlled to be 30-40 ℃.
As a still further scheme of the invention: the proportion of the components of the white cardboard is a surface pulp layer and a bottom pulp layer (25-40%) + a core pulp layer (75-60%).
Compared with the prior art, the invention has the beneficial effects that:
the invention makes the white cardboard have flushability, reducible pulp property and hydrolyzability on the basis of reaching certain physical indexes by changing the proportion of the formula in the paper, the toilet paper tube core produced by the white cardboard can be directly discarded in a toilet bowl after use, the toilet bowl and a sewer can not be blocked, in addition, defective goods with the paper tube core in the toilet paper manufacturing process can be directly repulped together with the toilet paper, the cost of toilet paper manufacturing is greatly reduced, and the manufacturing efficiency is increased.
Detailed Description
In the embodiment of the invention, a manufacturing process and a formula of a white cardboard with flushability comprise the following embodiments:
example 1
The operation steps are as follows:
step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine;
step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp;
step three, layering and stacking the flour paste: preparing the surface pulp, the bottom pulp and the core pulp into thin layers, placing the core layer between the surface layer and the bottom layer, and extruding and combining the layers by an extruding device to form semi-finished paper;
step four, applying surface starch glue: and uniformly brushing the surface starch glue on the surface of the semi-finished paper, and cooling to obtain the white cardboard.
The components of the surface pulp and the bottom pulp comprise 40% long fiber pulp (such as softwood pulp, softwood pulp waste pulp) + 60% short fiber pulp (such as hardwood pulp, hardwood pulp waste pulp), and the core pulp comprises 30% long fiber chemi-mechanical pulp (such as softwood chemi-mechanical pulp) + 70% short fiber chemi-mechanical pulp (such as poplar chemi-mechanical pulp), surface starch glue: 20 kg/ton finished white cardboard, fiber modifier: 5 kg/ton finished white cardboard.
The surface sizing layer and the bottom sizing layer in the step I: and (3) carrying out high-concentration grinding on the pulp for 30 degrees, and adding a fiber modifier in the second step.
The temperature of the core slurry for high grinding in the first step is controlled at 30 ℃.
The ratio of the components of the white cardboard is 25% of surface pulp layer and bottom pulp layer + 75% of core pulp layer.
Example 2
The operation steps are as follows:
step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine;
step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp;
step three, layering and stacking the flour paste: preparing the surface pulp, the bottom pulp and the core pulp into thin layers, placing the core layer between the surface layer and the bottom layer, and extruding and combining the layers by an extruding device to form semi-finished paper;
step four, applying surface starch glue: and uniformly brushing the surface starch glue on the surface of the semi-finished paper, and cooling to obtain the white cardboard.
The components of the surface pulp and the bottom pulp comprise 55% long fiber pulp (such as softwood pulp, softwood pulp waste pulp) + 45% short fiber pulp (such as hardwood pulp, hardwood pulp waste pulp), and the core pulp comprises 40% long fiber chemi-mechanical pulp (such as softwood chemi-mechanical pulp) + 60% short fiber chemi-mechanical pulp (such as poplar chemi-mechanical pulp), surface starch glue: 30 kg/ton finished white cardboard, fiber modifier: 10 kg/ton finished white cardboard.
The surface sizing layer and the bottom sizing layer in the step I: and grinding the pulp at a high concentration of 40 degrees, and adding a fiber modifier in the step two.
The temperature of the core slurry subjected to high grinding in the first step is controlled at 40 ℃.
The ratio of the components of the white cardboard is 40% of surface pulp layer and bottom pulp layer and 60% of core pulp layer.
Example 3
The operation steps are as follows:
step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine;
step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp;
step three, layering and stacking the flour paste: preparing the surface pulp, the bottom pulp and the core pulp into thin layers, placing the core layer between the surface layer and the bottom layer, and extruding and combining the layers by an extruding device to form semi-finished paper;
step four, applying surface starch glue: and uniformly brushing the surface starch glue on the surface of the semi-finished paper, and cooling to obtain the white cardboard.
The composition of the face stock and the bottom stock included 47.5%) long fiber pulp (e.g.; softwood pulp, softwood pulp-based waste pulp) + 52.5% short fiber pulp (e.g., hardwood pulp-based waste pulp), core pulp comprising 35% long fiber chemi-mechanical pulp (e.g.; needle chemi-mechanical pulp) + 65% short fiber chemi-mechanical pulp (e.g; poplar chemi-mechanical pulp), surface starch glue: 25 kg/ton finished white cardboard, fiber modifier: 7.5 kg/ton finished white cardboard.
The surface sizing layer and the bottom sizing layer in the step I: and grinding the pulp at a high concentration of 35 degrees, and adding a fiber modifier in the step two.
The temperature of the core slurry subjected to high grinding in the first step is controlled to be 35 ℃.
The ratio of the components of the white cardboard is 32.5% of surface pulp layer and bottom pulp layer + 67.5% of core pulp layer.
By combining the above embodiments and performing a detection test on the cardboard paper in the production place, firstly according to the principle: soaking the sample in distilled water at normal temperature for 3-5 min, stirring with a stirrer at constant speed for 10-15 min (rotation speed of 1500 rpm), and observing and inspecting the scattering condition of the sample.
The instrument comprises the following steps:
500ml of triangular flask, a flask fixing support, a constant-speed stirrer (with two smooth fan blades), a self-made screen, a thermometer, a timer or a stopwatch,
preparing a sample, namely taking the washable core paper with the length of 4cm and the width of 4cm, wherein the gram weight of 0.304g +/-0.008 g;
preparing before detection, adding 500ml of distilled water into the Erlenmeyer flask, placing the Erlenmeyer flask on a flask fixing support, and placing a stirrer in the center of the Erlenmeyer flask in a hanging manner.
Sample detection:
measuring and recording the temperature of 500ml of distilled water in a flask, soaking a sample in a triangular flask filled with 500ml of distilled water, standing for 3-5 minutes, stirring the soaked sample in the flask at a constant speed of 1500 rpm for 10-15 minutes, wherein a large amount of filamentous fibers and a small amount of flaky floc of about 0.3cm x 0.3cm are observed in the flask, filtering the distilled water and the dispersed fibers by using a self-made screen and taking out the flaky floc, slightly kneading the flaky floc by hand, and immediately dispersing the flaky floc.
And (4) judging a result:
the sample can be judged to return to the production line together with the primary pulp and defective toilet paper products of the production line for repulping through the detection of the dispersible paper core paper, and the possibility of secondary recovery and pulping of defective toilet paper products is fundamentally solved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications of the invention can be made, and equivalents of some features of the invention may be substituted, and any changes, equivalents, improvements and the like, which are within the spirit and principle of the invention, and which are not described in detail in the specification are within the scope of the invention and are known to those skilled in the art.
Claims (4)
1. A preparation process and a formula of a white cardboard with flushability are characterized in that the preparation process comprises the following operation steps:
step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine;
step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp;
step three, layering and stacking the flour paste: preparing surface pulp, bottom pulp and core pulp into thin layers, placing the core layer between the surface layer and the bottom layer, and extruding and combining the layers by an extruding device to obtain semi-finished paper;
step four, applying surface starch glue: and uniformly brushing the surface starch glue on the surface of the semi-finished paper, and cooling to obtain the white cardboard.
The components of the surface pulp and the bottom pulp comprise (40% -55%) long fiber pulp (such as softwood pulp, softwood pulp waste pulp) + (60% -45%) short fiber pulp (such as hardwood pulp, hardwood pulp waste pulp), and the core pulp comprises (30% -40%) long fiber chemi-mechanical pulp (such as softwood chemi-mechanical pulp) + (70% -60%) short fiber chemi-mechanical pulp (such as poplar chemi-mechanical pulp), surface starch glue: 20-30 kg/ton finished white cardboard, fiber modifier: 5-10 kg/ton finished white cardboard.
2. The process according to claim 1, wherein the first step comprises: and (3) carrying out high-concentration grinding on the pulp for 30-40 ℃, and adding a fiber modifier in the second step.
3. The process for making a dispersible ivory board according to claim 1, wherein the temperature for high grinding of the core pulp in the first step is controlled to be 30-40 ℃.
4. The process for preparing a white cardboard with flushability according to claim 1, wherein the ratio of the components of the white cardboard is surface pulp layer and bottom pulp layer (25% -40%) + core pulp layer (75% -60%).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110535905.9A CN113818277A (en) | 2021-05-17 | 2021-05-17 | Preparation process and formula of washable white cardboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110535905.9A CN113818277A (en) | 2021-05-17 | 2021-05-17 | Preparation process and formula of washable white cardboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113818277A true CN113818277A (en) | 2021-12-21 |
Family
ID=78912471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110535905.9A Pending CN113818277A (en) | 2021-05-17 | 2021-05-17 | Preparation process and formula of washable white cardboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113818277A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5916417A (en) * | 1997-08-22 | 1999-06-29 | International Paper Company | Method of making multi-ply paperboard sheet having layers of different fiber properties |
| 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 |
| JP2013022306A (en) * | 2011-07-22 | 2013-02-04 | Daio Paper Corp | Toilet roll |
| JP2016165472A (en) * | 2016-04-04 | 2016-09-15 | 大王製紙株式会社 | Toilet roll |
-
2021
- 2021-05-17 CN CN202110535905.9A patent/CN113818277A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5916417A (en) * | 1997-08-22 | 1999-06-29 | International Paper Company | Method of making multi-ply paperboard sheet having layers of different fiber properties |
| JP2013022306A (en) * | 2011-07-22 | 2013-02-04 | Daio Paper Corp | Toilet roll |
| 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 |
| JP2016165472A (en) * | 2016-04-04 | 2016-09-15 | 大王製紙株式会社 | Toilet roll |
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