CN110144752A - A kind of production technology of high internal bond fluting medium - Google Patents
A kind of production technology of high internal bond fluting medium Download PDFInfo
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- CN110144752A CN110144752A CN201910479325.5A CN201910479325A CN110144752A CN 110144752 A CN110144752 A CN 110144752A CN 201910479325 A CN201910479325 A CN 201910479325A CN 110144752 A CN110144752 A CN 110144752A
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- 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
Abstract
The present invention relates to pulping and paper-making production technical field, in particular to a kind of production technology of high internal bond fluting medium.The technique include slurrying, charge balance, copy forebay slurry enhance, manufacture paper with pulp, being dehydrated, top sizing, press polish and cutting, given up OCC wastepaper as raw material with 100% state, produce 70-130g/m2High internal bond fluting medium, paper internal bond is by 160-200J/m2Promote 350-400J/m2, high internal bond fluting medium per ton saves gelatinized starch dosage 15-20kg, reduces steam consumption 0.05-0.1t, and speed yield is obviously improved, and the tiny component of slurry keeps increase to reduce consumption of raw materials.Saving, steam saving and the wastepaper as raw material saving of gelatinized starch are counted, the comprehensive production cost of high internal bond fluting medium per ton reduces about 40 yuan, promotes 400,000 tons of paper machine annual output, save comprehensive about 16,000,000 yuan of production cost year.
Description
Technical field
The present invention relates to pulping and paper-making production technical field, in particular to a kind of production work of high internal bond fluting medium
Skill.
Background technique
Corrugated board is produced and processed by fluting medium and boxboard.Fluting medium is risen to stupefied, wavy watt of composition
Stupefied core paper, then face, inner boxboard are stained on both sides with adhesive.The middle layer of cardboard is in hollow structure, the elasticity having had, buffering
Performance, resistance to compression, damage resistibility can be good, and the corrugated case made of corrugated board is strong, resistance to broken, resistance to compression, are goods transportation packagings
Important materials, applied to national product, the every aspect of life.
Corrugated board presses its number of layers, can be divided into double-deck, three layers, five layers, the several types of seven layer paperboards: with one layer of corrugation
Two ply board is formed with a level paper, one layer of corrugation and two layers of facial tissue form triplex board, two layers of corrugation and three level paper composition
Five layer paperboards, three layers of corrugation and four level paper form seven layer paperboards.Corrugation is divided into big corrugation A type, small watt by the size for pressing corrugation
Stupefied Type B, middle corrugation c-type, the stupefied E type of microwatt, the small corrugation K-type of ultra micro.
It finds, when manufacturing three layers, five layers of c-type, E type corrugated board using high-strength corrugated base paper, uses in production practice
The high-strength corrugated base paper for making paper in centre can be layered in the case where being not affected by external force, directly result in point of corrugated board
Layer and quality are unqualified.And the stupefied type of corrugated board is thinner, and the case where layering, is more serious.
Through the demonstration of research repeatedly to fluting medium, thin corrugated paper board indices performance, it is believed that fluting medium internal bond
Be influence client carefully stupefied couch board be layered an important factor for, need to research and develop a kind of production work of high internal bond fluting medium
Skill, to promote the quality problems of fluting medium internal bond and corrugated board.
Summary of the invention
In view of above-mentioned technical problem existing for background technique, it is desirable to provide a kind of production work of high internal bond fluting medium
Skill, to solve the problems, such as that prior art corrugated board inner layer is unqualified due to the insufficient caused layering of internal bond and quality.
To achieve the above object, the production technology for inventor providing a kind of high internal bond fluting medium, including:
Pulping stage: being given up with 100% state as raw material, prepares OCC long by size degradation, screening, purification, classification, concentration
Fibre slurry, OCC fluff pulp, mashing obtain underflow；
Charge balance step: charging neutrality agent is added in Xiang Suoshu underflow, obtains wet end slurry；
It copies forebay slurry enhancing step: internal bond enhancing being added before copying forebay starching pump, in Xiang Suoshu wet end slurry
Agent, the internal bond reinforcing agent is amphoteric starch, and its viscosity is 160-200mPa.s, obtains copying forebay slurry；
Manufacture paper with pulp step: Xiang Suoshu copies forebay slurry and cation PAM dry powder polymer is added, and manufactures paper with pulp, Guo Wangqian
Sieve is added cationic polyacrylamide high molecular polymer, obtains wet end slurry；
Dehydration: by wet end approach flow portion, including spacer screen dehydration and top net dehydration, paper is obtained into；
Top sizing step: including the sizing of face roller and bottom roller sizing；
Press polish and dicing process obtain high internal bond fluting medium.
It is different from the prior art, above-mentioned technical proposal at least has the advantages that
With the useless OCC wastepaper as raw material of 100% state, production technology provided by the invention is used to produce 70-130g/m2It is combined in high
Fluting medium quality standard is fully achieved in power fluting medium, every quality index, and paper quality is protected, paper internal bond
By 160-200J/m2Promote 350-400J/m2, paper quality is improved significantly, and family of seing a visitor out is thin using C, E is manufactured
Stupefied couch board, corrugated paper are no longer layered, and made carton, carton items pi of strength are synchronized and got a promotion, completely
Solve the existing quality problems of existing corrugated board.Production technology high internal bond fluting medium section per ton provided by the invention
Gelatinized starch dosage 15-20kg is saved, steam consumption 0.05-0.1t is reduced, speed yield is obviously improved, and the tiny component of slurry is kept
Increase to reduce consumption of raw materials.Count saving, steam saving and the wastepaper as raw material saving of gelatinized starch, high interior combination per ton
The comprehensive production cost of power fluting medium reduces about 40 yuan, promotes 400,000 tons of paper machine annual output, saves comprehensive production cost year about
16000000 yuan.
Specific embodiment
The following detailed description of the production technology of high internal bond fluting medium provided by the invention.
A kind of production technology of high internal bond fluting medium, wherein include:
Pulping stage: being given up with 100% state as raw material, prepares OCC long by size degradation, screening, purification, classification, concentration
Fibre slurry, OCC fluff pulp, mashing obtain underflow；
Charge balance step: charging neutrality agent is added in Xiang Suoshu underflow, obtains wet end slurry；
It copies forebay slurry enhancing step: internal bond enhancing being added before copying forebay starching pump, in Xiang Suoshu wet end slurry
Agent, the internal bond reinforcing agent is amphoteric starch, and its viscosity is 160-200mPa.s, obtains copying forebay slurry；
Manufacture paper with pulp step: Xiang Suoshu copies forebay slurry and cation PAM dry powder polymer is added, and manufactures paper with pulp, Guo Wangqian
Sieve is added cationic polyacrylamide high molecular polymer, obtains wet end slurry；
Dehydration: by wet end approach flow portion, including spacer screen dehydration and top net dehydration, paper is obtained into；
Top sizing step: including the sizing of face roller and bottom roller sizing；
Press polish and dicing process obtain high internal bond fluting medium.
The paper internal bond Hydrogen bonding forces that hydroxyl is formed between paper fibre and fiber, reinforcing aids stay
Be adsorbed onto fiber, on fiber fines after with fibroplastic Hydrogen bonding forces.In the prior art, polyacrylamide is generallyd use
Class is as papermaking dry-strengthening agent, inadequate to the humidification of paper but since molecular weight and viscosity are relatively low.Pulp fiber characteristic is changed
The humidification of work auxiliary material, the forming evenness of paper, the content of fiber fines and filler and distribution, net part forming dewatering type pair
Paper internal bond has a significant impact.Excessive filler component causes formation of sheet bad, and fines distribution unevenness is to binding force
There is negative effect.Using amphoteric starch class as internal bond reinforcing agent in the present invention, the high, molecular weight using amylopectin content
Greatly, the amphoteric starch of reticular structure, viscosity and adsorption capacity are all improved significantly, so that high internal bond fluting medium is at paper
Internal bond promote 80-150%, the application of the internal bond reinforcing agent has also been obviously improved the retention of wet end initial journey, into
One step promotes the combination of fiber fines and long fibre, amphoteric starch, and improves the internal bond of fluting medium.
Further, the high cassava amphoteric starch of amylopectin content is used in the present invention or corn amphoteric starch is made
For internal bond reinforcing agent, cassava amphoteric starch or corn amphoteric starch have high graft crosslinking degree and molecular weight, viscosity can
Up to 160-200mPa.s, Anion substituting degree 0.01, degree ofacationic substitution 0.028-0.03.Therefore, theoretically, as long as
The degree of cross linking, molecular weight, viscosity, Anion substituting degree and the degree ofacationic substitution of amphoteric starch meet above-mentioned requirements, can make
For internal bond reinforcing agent of the invention.Above-mentioned amphoteric starch is subjected to boiling gelatinization using continuous gelatinization preparation process, is being copied
The amphoteric starch of addition gelatinization before forebay slurry sizing pump, additive amount are that high internal bond fluting medium per ton adds 3.5-6kg
Amphoteric starch.
Preferably, the internal bond reinforcing agent is the cassava amphoteric starch or corn that amylopectin content is 80-85%
Amphoteric starch.
It is further preferred that on the basis of the weight of the wet end slurry, the addition concentration of the internal bond reinforcing agent is
0.5-1wt%.
Further, the not high surface sizing technique of conventional automated degree is improved in the present invention, using film transfer meter
Amount sizing, accurate control plane roller sizing, bottom roller sizing, coating weight adjustable range is wide, Painting effect stable homogeneous, controls precision
It is high.
Preferably, in the top sizing step, the technique of the face roller sizing and bottom roller sizing is that film transfer metering is applied
Glue, face roller is glued, the amylopectin solid content of bottom roller sizing is 8-12%, viscosity 15-25mPa.s, the starch kiss-coating amount of single side
For 2.5-3g, total starch kiss-coating amount is 5-6g.
Further, due to using the OCC (Old Corrugated Cardboard) of 100% recycling useless in the present invention
Paper, plain boiled water height closed circulation, online slurry cationic demand PCD are 700-900 (μ eq/l), conductivity 4000-6000 (μ
S), show that the papermaking chaff interferent such as dissolved charge in slurry, colloidal substance, calcium and magnesium ion is more, it is tiny to seriously affect online slurry
The keeping of component, the efficiency of slurry water filtering performance and other papermaking performance chemicals.Therefore, it is necessary to charging neutrality agent removal is added
The anion of interference is generated, the charging neutrality agent to be added need to have very strong anion deposition and determine function.
Preferably, the charging neutrality agent is aluminum sulfate, the dosage of aluminum sulfate described in high internal bond fluting medium per ton
For 10-15kg.
Further, the present invention in wet end use retention agent type and its dosage should with copy forebay slurry addition interior knot
Resultant force reinforcing agent is adapted, before the suction-operated of amphoteric starch netted branch, zwitterion group added in wet end slurry
And the good retention force of amphoteric starch itself promotes fiber fines in long stapled absorption, inhales to fiber and fiber fines group
Attached, flocculation, Xie Xu, reconstruct is flocculated again and amphoteric starch adsorbs, retains under synergistic effect, and pulp web radical journey retention rate effectively mentions
Height is crossed the reservation that the cationic polyacrylamide high molecular polymer being added after sieve before netting makes fiber fines in paper and is increased,
It is more evenly distributed, the combination of fiber fines and long fibre, amphoteric starch is improved, and has effectively facilitated mentioning for paper internal bond
It rises.
Preferably, the molecular weight of the cation PAM dry powder polymer is 600-800 ten thousand, and charge density is
1.45meq/g。
It is further preferred that the molecular weight of the cationic polyacrylamide high molecular polymer is 400-600 ten thousand, charge is close
Degree is 3.2meq/g.
It is further preferred that in the step of manufacturing paper with pulp, cationic polyacrylamide in high internal bond fluting medium per ton
The additional amount of amine polymer powder is 0.40-45kg, cationic polyacrylamide high score in high internal bond fluting medium per ton
The additional amount of sub- polymer is 0.40-45kg.
In conventional dehydration technique, the free dewatering period in spacer screen portion is equipped with vaccum dewatering box after forming board, in high speed, height
Pulse and vaccum dewatering box be by force under vacuum suction effect, slurry the free dewatering period dehydration of spacer screen acutely, fiber fines component is worn
Wire side is crossed to be largely lost.It is 2.4-2.6% (being far below conventional paper machine into top net mass dryness fraction about 4-4.5%) into top net paper web mass dryness fraction,
On top, wet end also needs the water of removing about 45%, under the several vacuum chambers of top net by force vacuum suction effect, a large amount of fiber fines
Component again passes through wire side loss.The productive prospecting of the two-way dehydration of paper machine causes fiber fines component in the distribution of paper Z-direction
Unevenness.The present invention has carried out dewatering process improvement to above-mentioned technical problem, slows down the dewatering speed of wet end, to reduce improvement
Fiber fines component is lost, and improves the uniformity that fiber fines are distributed in paper Z-direction, is promoted into paper internal bond.
Preferably, in the dehydration, head box opening degree of slice lip is adjusted to 12.0-12.5mm, spacer screen 1, No. 2,3
Number wet suction box vacuum degree adjusts separately as -3kPa, -4kPa, -5kPa, pushes up net Room 1, Room 2, Room 3,4 Room vacuum degrees adjust separately
For -5kPa, -20kPa, -20kPa, -20kPa.
Further, in the beating process after conventional slurrying, disc mill abrasive disc type selecting to beating consistency, long fine beating degree all
There is larger impact, to promote high internal bond fluting medium into the internal bond of paper, long fine beating degree needs to control after beating
In 27-32SR, weight in wet base 6-7g.
Preferably, in the mashing step, the high 8.38-9.65mm of tooth, the serration alloy abrasive sheet of facewidth 2.41mm, control are selected
Beating consistency processed is 4-5%.
Technology contents, construction feature, the objects and the effects for detailed description technical solution, below in conjunction with specific reality
Example is applied to be explained in detail.It should be understood that these embodiments are merely to illustrate the application rather than limitation scope of the present application.
Embodiment 1-9 and comparative example 1-5 provides a kind of production technology of high internal bond fluting medium, specific production step
Suddenly include:
Slurrying: it is given up with 100% state as raw material, is prepared by OCC Pulping Line size degradation, screening, purification, classification, concentration
The fine slurry of OCC long, OCC fluff pulp.
Mashing: serration alloy disc mill abrasive disc, the in particular high 8.38-9.65mm of tooth, facewidth 2.41mm, to above-mentioned are selected
The fine slurry of OCC long, OCC fluff pulp are beaten, beating consistency 4-5%, are beaten effective power 25-35kwh/t, long fibre beating degree warp
Control is in 27-32SR, weight in wet base 6-7g after mashing, after beating process improves, promotes about 5-10% at paper internal bond, obtains dense
Slurry.
Charge balance step: charging neutrality agent aluminum sulfate, high internal bond fluting medium per ton are added in Xiang Suoshu underflow
Addition of aluminum sulfate is 10-15kg, adjusts online slurry cationic demand PCD to 400-500 (μ eq/l), obtains wet end slurry；
Copy forebay slurry enhancing step: before copying forebay slurry sizing pump, according to 1 illustrated embodiment 1-9 of table and comparative example
Internal bond reinforcing agent is added into the wet end slurry for the type and additive amount of 1-5 internal bond reinforcing agent, using continuous paste
Change preparation process, is gelatinized concentration 4-8%, 110-125 DEG C of boiling temperature, the gelatinized corn starch liquid cooked dissipates in the form of sheets under the microscope
It opens, can't see dotted, dark starch granules, then show that starch is gelatinized completely.On the basis of the weight of the wet end slurry, institute
The addition concentration for stating internal bond reinforcing agent is 0.5-1wt%, and its viscosity is 160-200mPa.s, obtains copying forebay slurry.
It manufactures paper with pulp step: adding according to the addition parameter of table 1 illustrated embodiment 1-9 and comparative example 1-5 to the forebay slurry of copying
Enter cation PAM dry powder polymer (molecular weight is 600-800 ten thousand, charge density 1.45meq/g), manufactures paper with pulp, cross net
Cationic polyacrylamide high molecular polymer (molecular weight is 400-600 ten thousand, charge density 3.2meq/g) is added in preceding sieve,
Obtain wet end slurry；
Dehydration: using single long mesh belt top net paper machine, grammes per square metre 70-130g/m is produced2, speed 1050-1200m/min,
Speed is high, and forming table is short, and spacer screen, top net are both needed to removing compared with big yield, belongs to typical two-way dehydration paper machine.Reduce head box labial lamina
Aperture, opening degree of slice lip drop to 12.0-12.5mm by 14.0-14.5mm, spacer screen 1, No. 2, No. 3 wet suction box vacuum by -5kPa, -
6kPa, -7kPa adjust separately as -3kPa, -4kPa, -5kPa, push up net Room 1, Room 2, Room 3,4 Room vacuum by -5kPa, -25kPa, -
26kPa, -27kPa adjust separately as -5kPa, -20kPa, -20kPa, -20kPa.The above adjustment mainly slows down the dehydration of wet end
Speed is lost to reduce and improve fiber fines component, improves uniformity that fiber fines are distributed in paper Z-direction for the wet end
Approach flow portion, including spacer screen dehydration and top net dehydration, obtain into paper.
Top sizing step: including the sizing of face roller and bottom roller sizing, 130g high-strength corrugated paper gelatinized starch prepares viscosity
250-350mPa.s, face roller, bottom roller are glued work station solid content 8-12%, and feeding station starch viscosity 15-25mPa.s passes through film
Shift metered size, single side starch kiss-coating amount 2.5-3g, total starch kiss-coating amount 5-6g.Suitable table adhesive process can promote interior combination
Power 30-50%.
Press polish and dicing process are that conventional a positive and a negative twice metal pressure roller of production of fluting base paper carries out press polish processing, are obtained
To high internal bond fluting medium.
The correlation performance parameters test method being related in the present invention is operated referring to following standard criterion:
The measurement of GB/T 2679.8-2016 paper and cardboard ring crush intensity
The measurement (Scott type) of GB/T 26203-2010 paper and cardboard internal bond strength
The measurement of GB/T 24993-2010 paper making wet part Zeta potential
The measurement of GB/T 24994-2010 paper making wet part dissolved charge amount
The measurement of GB/T 24323-2009 paper pulp laboratory page physical property
The preparation routine page of GB/T 24324-2009 paper pulp physical test laboratory page
The description and calibration of GB/T 22876-2008 paper, cardboard and corrugated board compressing tester
The measurement (525 DEG C) of GB/T 22877-2008 paper, cardboard and paper pulp burning residue (ash content)
The measurement of GB/T 12914-2008 paper and cardboard tensile strength
GB/T 13023-2008 corrugated core (original) paper
GB/T 4687-2007 paper, cardboard, paper pulp and relational language
The measurement (Xiao Baier-Rui Gelefa) of GB/T 3332-2004 pulp freeness
GB/T 740-2003 paper pulp sample is taken
The standard atmosphere condition of GB/T 10739-2002 paper, cardboard and paper pulp sample pretreating and test
GB/T 451.2-2002 paper and the quantitative measurement of cardboard
The measurement of GB/T 451.3-2002 paper and calliper
The production technology related raw material and parameter of embodiment 1-9 and comparative example 1-5 is shown in Table 1.
The production technology related raw material and parameter of table 1 embodiment 1-9 and comparative example 1-5
The fluting medium correlation performance parameters that the production technology of embodiment 1-9 and comparative example 1-5 provide are shown in Table 2.
The corrugated paper correlation performance parameters that the production technology of table 2 embodiment 1-9 and comparative example 1-5 provides
It can be seen that the interior use in conjunction with reinforcing agent from Tables 1 and 2 content and effect be obviously improved to internal bond.
The effect for trying out drying strengthening agent, corn cationic starch, cassava cationic starch, corn amphoteric starch, cassava amphoteric starch is compared,
It is best using the internal bond reinforcing effect of cassava amphoteric starch.Production instance is investigated, cassava amphoteric starch viscosity, additive amount two
Factor influences maximum, tapioca viscosity 200mpa.s at paper internal bond, and when additive amount 8kg/t paper, internal bond is best.
In view of comprehensive production cost, selection uses viscosity 150-200mpa.s cassava amphoteric starch, additive amount 4-6kg/t, and retention helps
Filtering agent dosage 0.4-0.5kg/t paper.
70-130g/m is produced using this production technology2Quality mark is fully achieved in high-strength corrugated base paper, every quality index
Standard, paper quality are protected, and paper internal bond is by 160-200J/m2Promote 350-400J/m2, paper quality obtains greatly
Amplitude is promoted, and using C, E is manufactured, carefully stupefied couch board, corrugated paper are no longer layered at family of seing a visitor out, and made carton, carton are each
Item pi of strength Synchronous lifting, completely solves Customer Quality problem.New process saves gelatinized starch dosage 15-20kg/t
Paper reduces steam consumption 0.05-0.1t/t paper, and speed yield is promoted, and the tiny component of slurry, which keeps increase, reduces consumption of raw materials.
Due to the saving of gelatinized starch, steam saving, wastepaper as raw material saving, the comprehensive production cost of ton paper reduces about 40 yuan/paper, promotes paper
400,000 tons of machine annual output, save comprehensive about 16,000,000 yuan of production cost year.
It should be noted that being not intended to limit although the various embodiments described above have been described herein
Scope of patent protection of the invention.Therefore, it based on innovative idea of the invention, change that embodiment described herein is carried out and is repaired
Change or the equivalent structure or equivalent process transformation made by using the contents of the present specification, directly or indirectly by the above technology
Scheme is used in other related technical areas, is included within scope of patent protection of the invention.
Claims (10)
1. a kind of production technology of high internal bond fluting medium characterized by comprising
Pulping stage: being given up with 100% state as raw material, starched by size degradation, screening, purification, classification, concentration preparation OCC long fibre,
OCC fluff pulp, mashing, obtains underflow；
Charge balance step: charging neutrality agent is added in Xiang Suoshu underflow, obtains wet end slurry；
It copies forebay slurry enhancing step: before copying forebay starching pump, internal bond reinforcing agent, institute being added in Xiang Suoshu wet end slurry
Stating internal bond reinforcing agent is amphoteric starch, and its viscosity is 160-200mPa.s, obtains copying forebay slurry；
Manufacture paper with pulp step: Xiang Suoshu copies forebay slurry and cation PAM dry powder polymer is added, and manufactures paper with pulp, and crosses sieve before netting, adds
Enter cationic polyacrylamide high molecular polymer, obtains wet end slurry；
Dehydration: by wet end approach flow portion, including spacer screen dehydration and top net dehydration, paper is obtained into；
Top sizing step: including the sizing of face roller and bottom roller sizing；
Press polish and dicing process obtain high internal bond fluting medium.
2. production technology according to claim 1, which is characterized in that the internal bond reinforcing agent is amylopectin content
For the cassava amphoteric starch or corn amphoteric starch of 80-85%.
3. production technology according to claim 1, which is characterized in that described on the basis of the weight of the wet end slurry
The additive amount of internal bond reinforcing agent is 0.5-1wt%.
4. production technology according to claim 1, which is characterized in that in the top sizing step, the face roller sizing
Technique with bottom roller sizing is film transfer metered size, and the amylopectin solid content that the sizing of face roller, bottom roller are glued is 8-12%, viscosity
For 15-25mPa.s, the starch kiss-coating amount of single side is 2.5-3g, and total starch kiss-coating amount is 5-6g.
5. production technology according to claim 1, which is characterized in that the charging neutrality agent is aluminum sulfate, in height per ton
The dosage of aluminum sulfate described in binding force fluting medium is 10-15kg.
6. production technology according to claim 1, which is characterized in that the cation PAM dry powder polymer
Molecular weight is 600-800 ten thousand, charge density 1.45meq/g.
7. production technology according to claim 6, which is characterized in that the cationic polyacrylamide high molecular polymer
Molecular weight be 400-600 ten thousand, charge density 3.2meq/g.
8. production technology according to claim 7, which is characterized in that in the step of manufacturing paper with pulp, high internal bond per ton
The additional amount of cationic polyacrylamide polymer powder is 0.40-45kg in fluting medium, and high internal bond corrugation per ton is former
The additional amount of cationic polyacrylamide high molecular polymer is 0.40-45kg in paper.
9. production technology according to claim 1, which is characterized in that in the dehydration, head box opening degree of slice lip
Adjust to 12.0-12.5mm, spacer screen 1, No. 2, No. 3 wet suction box vacuum degrees adjust separately as -3kPa, -4kPa, -5kPa, push up net
Room 1, Room 2, Room 3,4 Room vacuum degrees adjust separately as -5kPa, -20kPa, -20kPa, -20kPa.
10. production technology according to claim 1, which is characterized in that in the mashing step, select the high 8.38- of tooth
The serration alloy abrasive sheet of 9.65mm, facewidth 2.41mm, control beating consistency are 4-5%.
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| CN110983853A (en) * | 2019-11-22 | 2020-04-10 | 山鹰华南纸业有限公司 | Method for producing T paper by long-wire paper machine |
| CN111560790A (en) * | 2020-06-03 | 2020-08-21 | 玖龙纸业（东莞）有限公司 | Water-resistant and moisture-proof method for corrugated base paper |
| CN113210283A (en) * | 2021-03-26 | 2021-08-06 | 应鹏 | Sand removal detection device for metal tiles made of color stone sand corrugated steel plate |
| CN114481706A (en) * | 2022-01-24 | 2022-05-13 | 灌云利民再生资源科技发展有限公司 | Corrugated board with high internal binding force and production process thereof |
| CN114575181A (en) * | 2022-04-08 | 2022-06-03 | 南京林业大学 | High-strength corrugated base paper prepared from domestic waste paper and preparation method thereof |
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| CN113210283A (en) * | 2021-03-26 | 2021-08-06 | 应鹏 | Sand removal detection device for metal tiles made of color stone sand corrugated steel plate |
| CN114481706A (en) * | 2022-01-24 | 2022-05-13 | 灌云利民再生资源科技发展有限公司 | Corrugated board with high internal binding force and production process thereof |
| CN114481706B (en) * | 2022-01-24 | 2022-12-02 | 灌云利民再生资源科技发展有限公司 | Corrugated board with high internal binding force and production process thereof |
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