CN110714349A - Production process of high-strength corrugated base paper - Google Patents
Production process of high-strength corrugated base paper Download PDFInfo
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- CN110714349A CN110714349A CN201910998543.XA CN201910998543A CN110714349A CN 110714349 A CN110714349 A CN 110714349A CN 201910998543 A CN201910998543 A CN 201910998543A CN 110714349 A CN110714349 A CN 110714349A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/32—Defibrating by other means of waste paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
-
- 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
- D21F11/12—Making corrugated paper or board
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
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- 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
- Y02W30/64—Paper recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
The invention discloses a production process of high-strength corrugated base paper, which is one of important component materials for producing corrugated boards, wherein the corrugated base paper requires good fiber bonding strength, smooth paper surface, better tightness and stiffness and certain elasticity, and comprises the following four steps. The invention optimizes the raw material purchasing and storing part of the corrugated raw paper, selects high-quality raw materials for processing, and performs unpacking and sorting before the waste paper is disintegrated, because the waste paper has complex components and more impurities, some large impurities are picked out before entering a pulper, the load of the disintegrating and purifying equipment can be greatly reduced, the phenomenon that the disintegrating and purifying equipment is damaged due to more impurities caused by other factors when in use is avoided, the loss of the production equipment caused by the impurities is reduced, and the purification and impurity removal parts in the processing technology are changed, so that the purity of the raw materials of the corrugated raw paper can be effectively improved when in use, and the high-strength corrugated raw paper with high quality can be manufactured.
Description
Technical Field
The invention relates to the technical field of metal processing, in particular to a production process of high-strength corrugated base paper.
Background
The corrugated base paper is one of important component materials for producing corrugated boards, the corrugated base paper requires good fiber bonding strength, is flat in paper surface, has better tightness and stiffness and requires certain elasticity so as to ensure that a manufactured carton has shock resistance and pressure resistance, is also called corrugated core paper, is raw material paper for forming a corrugated middle core of the corrugated board, is processed by a corrugating machine, is corrugated paper formed by corrugating the core paper by a corrugated roller heated to 160-180 ℃, has roll paper and flat paper, has the fixed quantity of 112-200 g/m2, uniform fiber tissue, consistent paper web thickness, yellow and bright color, has certain bulk, has higher stiffness, ring crush strength and water absorption and excellent bonding adaptability, is prepared by using natural broadleaf wood semi-chemical pulp, cold alkali pulp or natural alkali method straw pulp or waste paper pulp, is delivered to a multi-cylinder circular net paper machine for papermaking after free pulping, the paper is mainly used as a corrugated core layer (middle layer) of the corrugated board, plays an important role in the shock resistance of the corrugated board, and can also be independently used as packaging paper of fragile articles.
However, the prior art of high-strength corrugated medium is not focused on the selection and storage of raw materials of corrugated medium, and many raw materials begin to go mouldy during the storage process, which affects the quality of corrugated medium.
Disclosure of Invention
The invention aims to provide a production process of high-strength corrugated base paper, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-strength corrugated medium production process is one of important component materials for producing corrugated boards, the corrugated medium requires good fiber bonding strength, smooth paper surface, better tightness and stiffness and certain elasticity, so as to ensure that the manufactured carton has shockproof and pressure-resistant capabilities, and the process comprises the following four steps:
the method comprises the following steps: selecting and selecting raw materials, selecting and purchasing waste paper with more wood fibers and longer fibers, such as American OCC (optical fiber control) and the like, and properly matching part of other waste paper, wherein the purchased waste paper material is properly stored, so that mildew and deterioration caused by rain erosion are avoided;
step two: screening and pulping, namely performing hydraulic shearing and pulping on the waste paper by utilizing a hydraulic pulper according to the hydraulic cutting principle, purifying and removing impurities after the pulping, concentrating the pulp which is doped with a large amount of water quality, and performing pulp grinding and forming after the treatment;
step three: a glue applying process, namely adding a certain amount of starch and clear water into a glue making tank, continuously stirring, adding weighed glue boiling master batch, uniformly stirring, controlling the temperature to rise to 58-72 ℃ within 21-26 minutes, continuously raising the temperature to 88-100 ℃, controlling the time to 5-63 minutes, and finally performing glue application after keeping the temperature at 95 ℃ for 10-20 minutes;
step four: drying, namely drying the paper after sizing, wherein the overall temperature of the wet paper is uniformly increased in the early stage of drying, the surface temperature of an initial drying cylinder is not higher than 95 ℃, the temperature of a middle section is preferably 120 ℃, and the temperature of a final section cylinder is reduced to 40 ℃, so that the corrugated base paper is formed.
Further, before the used paper is pulped, unpacking and sorting should be carried out, because the used paper has complex components and more sundries, and some large impurities are sorted out before entering a pulper, so that the burden of the pulping and sorting purification equipment can be greatly reduced.
Furthermore, the waste paper is recycled for multiple times, some cell walls are seriously cornified, if the waste paper is mainly cut during pulping, the fiber strength is greatly reduced, so that the paper strength is reduced, medium-consistency pulping mainly comprising devillicate broomstick is performed, the strong friction among fibers is utilized to achieve the pulping effect, the length strength of the fibers can be effectively maintained, the physical strength of later finished paper is laid down, the high-strength corrugated paper taking OCC waste paper as a main raw material is generally controlled to be about 30-35 DEG SR, and the wet weight of the fibers is 3-3.58.
Furthermore, when the sizing agent is molded on the net, the concentration of the sizing agent is controlled to be below 0.5 percent, the number of the net cages is properly increased so as to improve the uniformity of the raw paper of the crock, and the ratio of the sizing speed to the net speed is 0.8.
Further, the corrugated medium after the drying treatment is subjected to coiling, rewinding and slitting treatment, and finally the high-strength corrugated medium is obtained.
Further, the edge pressure strength of the corrugated base paper is related to the thickness of the paper, and the bulk of the paper is also increased appropriately while ensuring the tightness during papermaking.
Compared with the prior art, the invention has the beneficial effects that: the preparation method of the high-strength corrugated medium production process optimizes the purchasing and storing parts of the raw materials of the corrugated medium, selects high-quality raw materials for processing, removes part of impurities before processing, reduces the loss of the impurities to production equipment, and can effectively improve the purity of the raw materials of the corrugated medium when in use by changing the purifying and impurity removing parts in the processing process, thereby manufacturing the high-quality high-strength corrugated medium.
Drawings
Fig. 1 is a flow chart of the production process of the high-strength corrugating base paper of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1, an embodiment of the present invention: a high-strength corrugated medium production process is one of important component materials for producing corrugated boards, the corrugated medium requires good fiber bonding strength, smooth paper surface, better tightness and stiffness and certain elasticity, so as to ensure that the manufactured carton has shockproof and pressure-resistant capabilities, and the process comprises the following four steps:
the method comprises the following steps: selecting raw materials, selecting waste paper with more wood fibers and longer fibers for selective purchasing, such as American OCC (optical fiber control) and the like as main materials, properly matching part of other waste paper, properly selecting and removing impurities in the waste paper in the selective purchasing process, strictly controlling the impurity moisture and the proportion of the OCC and the impurity paper in the waste paper, properly storing the selected waste paper material, avoiding mildew and deterioration caused by rain erosion, preventing fire and insulating heat, and avoiding carbonization of the waste paper in the storage process;
step two: screening and pulping, namely performing hydraulic shearing and pulping on the waste paper by utilizing a hydraulic pulper according to a hydraulic cutting principle, wherein the pulping concentration is high, the consumption is low, the cut fibers are few, and impurities such as metal, gravel, plastic, rag and the like in the waste paper cannot be damaged, so that a user can screen the waste paper more conveniently;
step three: a glue applying process, namely adding a certain amount of starch and clear water into a glue making tank, continuously stirring, adding weighed glue boiling master batch, uniformly stirring, controlling the temperature to rise to 58-72 ℃ within 21-26 minutes, continuously raising the temperature to 88-100 ℃, controlling the time to 5-63 minutes, and finally performing glue application after keeping the temperature at 95 ℃ for 10-20 minutes;
step four: drying, namely drying the paper after sizing, wherein the overall temperature of the wet paper is uniformly increased in the early stage of drying, the surface temperature of an initial drying cylinder is not higher than 95 ℃, the temperature of a middle section is preferably 120 ℃, and the temperature of a final section cylinder is reduced to 40 ℃, so that the corrugated base paper is formed.
Further, before carrying out the fragmentation to waste paper, should unpack the letter sorting, because the composition of waste paper is complicated, debris are more, pick out some big impurity before getting into the pulper, can alleviate the burden of purification equipment that the fragmentation is decomposed greatly, avoid the purification equipment that the fragmentation appears the phenomenon of damaging because of the impurity of other factors is more when using to the holistic life of extension fixture.
Furthermore, because some cell walls of the waste paper are seriously cornified after being recycled for a plurality of times, if the waste paper is mainly cut during pulping, the fiber strength can be greatly reduced, so that the paper strength is reduced, medium-consistency pulping mainly comprising devillicate brooms is adopted, the pulping effect is optimal when the pulp is ground to be about 10% -12%, the strong friction among fibers is utilized to achieve the pulping effect, the length strength of the fibers can be effectively kept, the physical strength of the finished paper is laid down, high-strength corrugated paper mainly comprising OCC waste paper is used, the pulping degree is generally controlled to be about 30-35 SR, and the wet weight of the fibers is 3-3.58.
Further, the pulp is preliminarily formed after grinding, when the pulp is formed by netting, the concentration of the pulp is controlled to be below 0.5%, the number of the net cages is properly increased so as to improve the uniformity of the raw paper of the tile can, the ratio of the sizing speed to the net speed is 0.8, the moisture of the paper is controlled to be 5%, the dryness of the paper before sizing is controlled to be as small as possible, the moisture of the paper is preferably controlled to be 3%, and the dryness of the paper is more favorable for the penetration of starch glue liquid in the surface sizing process.
Further, the dried corrugated base paper is subjected to coiling, rewinding and slitting treatment, and finally the high-strength corrugated base paper is obtained.
Further, the edge pressure strength of the corrugated base paper is related to the thickness of the paper, and the bulk of the paper is also properly increased on the premise of ensuring the tightness during papermaking, so that the quality of the produced corrugated base paper is improved.
Example 2
Firstly, a slurry purification and impurity removal process:
before and after the waste paper is shredded, sundries such as metal, gravel, plastic, rag and the like contained in the waste paper need to be screened, so that the condition that the impurities such as metal, gravel, plastic, rag and the like are doped in the pulp to influence the overall quality of the corrugated base paper is avoided.
1. Purifying and decontaminating slurry
1.1, primary screening:
selecting a sieve plate with a phi 0.2 hole pattern, primarily screening the slurry by using a physical filtration principle, treating and filtering impurities such as metal, sand, plastics, rags and the like with the phi larger than 0.2, and adding 0.2% of natural rubber oil and 0.1-0.4% of sodium diacetate according to the weight ratio of the absolutely dry slurry, so that the rapid separation of long fibers and short fibers in the slurry is promoted, and the classification efficiency is improved.
1.2, medium-grade screening:
as the aperture of the phi 0.2 hole type sieve plate is larger, and some impurities smaller than phi 0.2 such as metal, sand, plastics, rags and the like still pass through the sieve plate, secondary filtration is needed to further remove fine sand particles, and the pulp inlet concentration is controlled to be 1.0-1.25%.
1.3, advanced screening:
and selecting a 0.15mm slotted screen, and finely screening the long fiber slurry subjected to intermediate-grade filtration.
The screening back is washd elementary screening, intermediate level screening and senior screening respectively, avoids this device to take place the phenomenon of jam because of not clearing up the phenomenon of screening plant when repeatedly using to impurity to improve the device.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a high-strength corrugated medium production technology, is one of the important component material of production corrugated container board, and corrugated medium requires that fibre bonding strength is good, and the paper is level and smooth, has better tightness and deflection, requires to have certain elasticity to guarantee that the carton of making has shockproof and compressive capacity, its characterized in that: the method comprises the following four steps:
the method comprises the following steps: selecting and selecting raw materials, selecting and purchasing waste paper with more wood fibers and longer fibers, such as American OCC (optical fiber control) and the like, and properly matching part of other waste paper, wherein the purchased waste paper material is properly stored, so that mildew and deterioration caused by rain erosion are avoided;
step two: screening and pulping, namely performing hydraulic shearing and pulping on the waste paper by utilizing a hydraulic pulper according to the hydraulic cutting principle, purifying and removing impurities after the pulping, concentrating the pulp which is doped with a large amount of water quality, and performing pulp grinding and forming after the treatment;
step three: a glue applying process, namely adding a certain amount of starch and clear water into a glue making tank, continuously stirring, adding weighed glue boiling master batch, uniformly stirring, controlling the temperature to rise to 58-72 ℃ within 21-26 minutes, continuously raising the temperature to 88-100 ℃, controlling the time to 5-63 minutes, and finally performing glue application after keeping the temperature at 95 ℃ for 10-20 minutes;
step four: drying, namely drying the paper after sizing, wherein the overall temperature of the wet paper is uniformly increased in the early stage of drying, the surface temperature of an initial drying cylinder is not higher than 95 ℃, the temperature of a middle section is preferably 120 ℃, and the temperature of a final section cylinder is reduced to 40 ℃, so that the corrugated base paper is formed.
2. The production process of the high-strength corrugated medium paper as claimed in claim 1, wherein the production process comprises the following steps: before the waste paper is disintegrated, unpacking and sorting should be carried out, because the components of the waste paper are complex, sundries are more, and some large impurities are sorted out before entering a pulper, so that the burden of a disintegrating, pin-sorting and purifying device can be greatly reduced.
3. The production process of the high-strength corrugated medium paper as claimed in claim 1, wherein the production process comprises the following steps: the waste paper is recycled for multiple times, some cell walls are seriously cornified, if the waste paper is mainly cut during pulping, the fiber strength is greatly reduced, so that the paper strength is reduced, medium consistency pulping mainly comprising devillicate broomstick is adopted, the strong friction among fibers is utilized to achieve the pulping effect, the length strength of the fibers can be effectively maintained, the basis is laid for the physical strength of later finished paper, the high-strength corrugated paper taking OCC waste paper as a main raw material is generally controlled to be about 30-35 DEG SR, and the wet weight of the fibers is 3-3.58.
4. The production process of the high-strength corrugated medium paper as claimed in claim 1, wherein the production process comprises the following steps: when the sizing agent is molded on the net, the concentration of the sizing agent is controlled to be below 0.5 percent, the number of the net cages is properly increased so as to improve the uniformity of the tile can base paper, and the ratio of the sizing speed to the net speed is 0.8.
5. The production process of the high-strength corrugated medium paper as claimed in claim 1, wherein the production process comprises the following steps: and (3) reeling, rewinding and cutting the dried corrugated base paper to finally obtain the high-strength corrugated base paper.
6. The production process of the high-strength corrugated medium paper as claimed in claim 1, wherein the production process comprises the following steps: the edge pressure strength of the corrugated base paper is related to the thickness of the paper, and the bulk of the paper is also properly increased on the premise of ensuring the tightness during papermaking.
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Citations (8)
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|---|---|---|---|---|
| US6241848B1 (en) * | 1999-06-21 | 2001-06-05 | The Hoffman Group, Ltd. | Method for processing recycled waste paper for integrated packaging |
| CN1525004A (en) * | 2003-09-17 | 2004-09-01 | 浙江蓝星科技有限公司 | Processing method of regenerated corrugated base paper |
| CN101429739A (en) * | 2008-12-17 | 2009-05-13 | 安徽山鹰纸业股份有限公司 | Ultra-low quantitative high-strength corrugated base paper production method and products produced thereby |
| CN101565913A (en) * | 2009-05-08 | 2009-10-28 | 东莞玖龙纸业有限公司 | Method for producing corrugated paper with ultralow gram weight and high strength |
| CN101824771A (en) * | 2009-06-13 | 2010-09-08 | 汇鑫生物浆纸股份有限公司 | Production process of high-strength corrugated base paper |
| CN104594100A (en) * | 2014-08-04 | 2015-05-06 | 山东菏泽恒立纸业有限公司 | Production technology of high-strength corrugating base paper |
| CN104631195A (en) * | 2015-01-07 | 2015-05-20 | 江苏理文造纸有限公司 | Method for manufacturing low-basis-weight and high-strength corrugated base paper for micro corrugated board production |
| CN109821896A (en) * | 2019-02-22 | 2019-05-31 | 天津科技大学 | A kind of new method that enzyme pretreatment extracts starch type organic from secondary stock, purifies slurry |
-
2019
- 2019-10-21 CN CN201910998543.XA patent/CN110714349A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6241848B1 (en) * | 1999-06-21 | 2001-06-05 | The Hoffman Group, Ltd. | Method for processing recycled waste paper for integrated packaging |
| CN1525004A (en) * | 2003-09-17 | 2004-09-01 | 浙江蓝星科技有限公司 | Processing method of regenerated corrugated base paper |
| CN101429739A (en) * | 2008-12-17 | 2009-05-13 | 安徽山鹰纸业股份有限公司 | Ultra-low quantitative high-strength corrugated base paper production method and products produced thereby |
| CN101565913A (en) * | 2009-05-08 | 2009-10-28 | 东莞玖龙纸业有限公司 | Method for producing corrugated paper with ultralow gram weight and high strength |
| CN101824771A (en) * | 2009-06-13 | 2010-09-08 | 汇鑫生物浆纸股份有限公司 | Production process of high-strength corrugated base paper |
| CN104594100A (en) * | 2014-08-04 | 2015-05-06 | 山东菏泽恒立纸业有限公司 | Production technology of high-strength corrugating base paper |
| CN104631195A (en) * | 2015-01-07 | 2015-05-20 | 江苏理文造纸有限公司 | Method for manufacturing low-basis-weight and high-strength corrugated base paper for micro corrugated board production |
| CN109821896A (en) * | 2019-02-22 | 2019-05-31 | 天津科技大学 | A kind of new method that enzyme pretreatment extracts starch type organic from secondary stock, purifies slurry |
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