CN107254797B - The production technology of paper and lower paper on a kind of protecting paper of gypsum board - Google Patents
The production technology of paper and lower paper on a kind of protecting paper of gypsum board Download PDFInfo
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- CN107254797B CN107254797B CN201710685711.0A CN201710685711A CN107254797B CN 107254797 B CN107254797 B CN 107254797B CN 201710685711 A CN201710685711 A CN 201710685711A CN 107254797 B CN107254797 B CN 107254797B
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- paper
- gypsum board
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- 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
- D21H27/32—Multi-ply with materials applied between the sheets
-
- 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
- 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
-
- 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
- D21H21/18—Reinforcing agents
- D21H21/20—Wet strength agents
Abstract
The production technology of paper and lower paper on a kind of protecting paper of gypsum board, belong to the technical field of producing of protecting paper of gypsum board, it is big can to solve fluctuation in the prior art, it is at high cost, the unstable problem of final product quality, including pulping workshop section, slurrying workshop section and papermaking workshop section, the pulping workshop section of paper includes OCC line pulping and ONP line pulping under protecting paper of gypsum board, the slurrying workshop section of paper includes the slurrying of OCC line and ONP line slurrying under protecting paper of gypsum board, gauze portion uses face on protecting paper of gypsum board, core, bottom three-layer network, gauze portion uses face under protecting paper of gypsum board, lining, core, bottom four-layer network, the present invention reduces production cost, improve product quality.
Description
Technical field
The invention belongs to the technical field of producing of protecting paper of gypsum board, and in particular to paper on a kind of protecting paper of gypsum board
And the production technology of lower paper.
Background technique
Protecting paper of gypsum board is exactly to be covered in gypsum core material two sides, and can be with gypsum core material securely when producing plasterboard
It is bonded together, that two layers of the cardboard to play a protective role to gypsum core material.It is divided into paper and lower paper, upper paper refers to production paper
Cardboard (bottom plate used when constructing, also referred to as backing paper) its face bottom solid colour being covered in when plasterboard above calcium plaster.Under
The cardboard (facial tissue used when constructing) of carrying calcium plaster when paper refers to production Thistle board.Old protecting paper of gypsum board is raw
Production. art has certain limitation in terms of sizing, mashing, upper net forming, chemicals addition, squeezing, and there is productions
The defects of fluctuation is big, at high cost, final product quality is unstable.
Summary of the invention
The present invention is big for fluctuation in the prior art, and at high cost, the unstable problem of final product quality provides one kind
The production technology of paper and lower paper on protecting paper of gypsum board.
The present invention adopts the following technical scheme:
The production technology of paper and lower paper on a kind of protecting paper of gypsum board, including pulping workshop section, slurrying workshop section and papermaking workshop section；
The first step, pulping workshop section, paper is broken under pulping workshop section and protecting paper of gypsum board including paper on protecting paper of gypsum board
Starch workshop section, wherein the pulping workshop section of paper on protecting paper of gypsum board includes the following steps: that packed waste paper first passes through chain mat machine
It is delivered to bale opener, rotary drum pulping machine is entered after waste paper is discongested out, after being passed through 35-40 DEG C of warm water, repulping of waste paper is at concentration
4% paper pulp, the rubbish discharge system such as plastics, cloth；Paper pulp is pumped into HC Cleaner, after removing bulk stone, squeezes into
It is spare to starch tower；
The pulping workshop section of paper includes OCC line pulping and ONP line pulping under protecting paper of gypsum board, wherein OCC line pulping includes
Following steps: packed waste paper first passes through chain mat machine conveying hydrabrusher, and after adding water and stirring size degradation, tail slurry is clear by waterpower
Slag machine and drum sieve recycled fiber, plastics discharge system；Good slurry is sent into HC Cleaner, after removing bulk stone, squeezes into slurry tower
It is spare；
ONP line pulping includes the following steps: that waste paper by chain mat machine, is delivered to rotary drum pulping machine, is passed through 35-40 DEG C of temperature
Water, while deinking chemicals are added: 0.8-1.0kg/ tons of waste paper of deinking agent, 25-30kg/ tons of waste paper of hydrogen peroxide, sodium hydroxide 20-
25kg/ tons of waste paper, 10-15kg/ tons of waste paper of sodium metasilicate, the paper pulp that size degradation is 4% at concentration, the rubbish such as plastics, cloth discharge system
System；Paper pulp is pumped into HC Cleaner, and after removing bulk stone, it is spare to squeeze into slurry tower；
Second step, slurrying workshop section, the system of paper under slurrying workshop section and protecting paper of gypsum board including paper on protecting paper of gypsum board
Starch workshop section, wherein the slurrying workshop section of paper on protecting paper of gypsum board, the slurry for including the following steps: that pulping workshop is come first pass through slightly
Sieve screening slurry, tail slurry send rotary drum pulping machine, plastic sheet discharge system back to by the fiber of slag draining and separating machine separator well；Good slurry is logical
Long, medium and short fibre stuff is formed after the classification of classifying screen twice, long stuff removes tiny gravel through too low dense scummer
Afterwards, slurry is further screened by fine screen, then polydisc thickener enters heat partition system after being concentrated into 10% mass concentration,
100-105 DEG C of temperature, disk mill gap 0.15mm are controlled, dispersion sicker to naked eyes can not identify, be beaten shape finally by mill
It is spare at the slurry that beating degree is 40 ± 2 ° of SR, concentration is 4%；Middle fibre stuff passes through low dense scummer, polydisc thickener, heat
After decentralized system, mill mashing, it is spare to form the slurry that beating degree is 40 ± 2 ° of SR, concentration is 4%；Staple fiber dense is removed through too low
It is spare that the slurry that concentration is 4% is formed after slag device and polydisc thickener；
The slurrying workshop section of paper under protecting paper of gypsum board, including the slurrying of OCC line and ONP line slurrying, wherein OCC line slurrying packet
Include following steps: the slurry that pulping workshop is come first passes through scalping screening slurry, and tail slurry passes through the fiber of slag draining and separating machine separator well
Send hydrabrusher, plastic sheet discharge system back to；After good slurry is classified by classifying screen, long and short fibre stuff, long fiber pulp are formed
Material further screens slurry by fine screen, then polydisc thickener is concentrated into 10% after too low dense scummer removes tiny gravel
Mass concentration after enter heat partition system, control 100-105 DEG C of temperature, disk mill gap 0.15mm, dispersion sicker to naked eyes
It can not identify, be beaten that form the slurry that beating degree is 40 ± 2 ° of SR, concentration is 4% spare finally by mill；Short stock warp
After too low dense scummer and polydisc thickener, it is standby that the slurry that beating degree is 40-43 ° of SR, concentration is 4% is formed by high consistency beating
With；
ONP line slurrying includes the following steps: that the slurry that pulping workshop is come first passes through scalping screening slurry, and tail slurry sends rotary drum back to
Pulper, good slurry enters flotation cell, by the ink flotation discharge system in newspaper, then removes tiny sand by low dense scummer
Slurry is further screened by fine screen after gravel, subsequently enters after polydisc thickener is concentrated into 10% mass concentration and enters heat partition
System controls 105-110 DEG C of temperature, disk mill gap 0.13mm, and dispersion sicker to naked eyes can not identify, it is standby to be finally sent into slurry tower
With；
Third step, papermaking workshop section, paper makes under papermaking workshop section and protecting paper of gypsum board including paper on protecting paper of gypsum board
Paper workshop section, wherein the papermaking workshop section of paper on protecting paper of gypsum board includes the following steps: that the slurry of slip house passes through streaming
After system, i.e. fan pump, pressurized screen, forms the slurry that concentration is 0.4%-0.8% and online is sprayed by head box, approach system adds
It is as follows to enter chemicals: 4kg/ tons of paper of starch, 5-10kg/ tons of 1-3kg/ tons of paper of wet strength agent, drying strengthening agent paper in starching being added before starching pump,
2.5-3kg/ tons of aluminum sulfate 15-20kg/ tons of paper, ASA sizing agent paper are added after fan pump, dry powder retention agent is added before pressurized screen
Filter aid 0.6kg/ tons of paper is added after pressurized screen for 0.3-0.4kg/ tons of paper.Wet end uses 3 layers of net (face, core, bottom), during surface layer is
Fiber vermicelli, core, bottom are long and short fiber 5:6 mixed slurry in mass ratio, are dehydrated by dewatering elements to 10-14% mass dryness fraction, pressure
Squeezing portion is made of big roller diameter+boots pressure, and splenium mass dryness fraction is 50% out, by front baking, table glue, after dry, batch, it is most multiple through rewinding machine afterwards
It is rolled into the paper roll of different size, into storehouse.Table glue surface, bottom starch concentration are 6%.
Control into paper water imbibition surface layer 20-30g/m2, bottom 30-50g/ m2, hot water infiltration 3000-3600s；
Preferably, in the chemicals that paper approach system is added on protecting paper of gypsum board, 2kg/ tons of paper of wet strength agent；
The papermaking workshop section of paper under protecting paper of gypsum board includes the following steps: that the slurry of slip house passes through approach system,
I.e. after fan pump, pressurized screen, forms the slurry that concentration is 0.4%-0.8% and online, approach system additionization are sprayed by head box
Product are as follows: 4kg/ tons of paper of starch, 10-15kg/ tons of 1-5kg/ tons of paper of wet strength agent, drying strengthening agent paper in starching, punching being added before starching pump
2.5-3kg/ tons of aluminum sulfate 15-20kg/ tons of paper, ASA sizing agent paper are added after stock pump, dry powder retention agent 0.3- is added before pressurized screen
Filter aid 0.6kg/ tons of paper is added after pressurized screen, while different dyes being added as needed for 0.4kg/ tons of paper.Wet end uses 4 layers
Net (face, lining, core, bottom), surface layer are Deinking Pulp vermicelli, and lining, core, bottom are long and short fiber according to mass ratio 6:4 mixed slurry, are led to
Dewatering elements are crossed to be dehydrated to 10-14% mass dryness fraction, press section is made of big roller diameter+boots pressure, out splenium mass dryness fraction be 50%, by front baking,
Table glue is dried afterwards, is batched, most afterwards through rewinding machine rewinding at the paper roll of different size, into storehouse.Table glue surface, bottom starch concentration
It is 6%.
Control into paper water imbibition surface layer 20-30g/ m2, bottom 30-40g/ m2, hot water infiltration 3000-3600s.
Preferably, in the chemicals that paper approach system is added under protecting paper of gypsum board, 4kg/ tons of paper of wet strength agent.
Beneficial effects of the present invention are as follows:
1. the present invention uses waste paper for raw material, raw material of papermaking fiber is saved, meanwhile, waste paper pulp-making, compared to timber and grass
Class raw pulp, reduces cooking process, has saved the consumption of chemicals, and no black liquor generates, and significantly reduces pollutional load, institute
With investment reduction of the present invention, energy saving, pollution abatement meets national environmental protection policy.
2. paper uses ASA sizing agent on protecting paper of gypsum board of the present invention, maturation is fast on machine, sizing is stablized, quality is high；
Using three formable layer nets, reduce wet end energy consumption, while middle fiber vermicelli make surface layer evenness high, surface is moist；It is added
Wet strength agent, improves hygral expansion, so that intensity is still high after paper is wetted during plaster plate making；Press section uses
Novel boots press technology, improve out and squeeze mass dryness fraction, reduce drying portion steam consumption.In short, present invention process improves paper machine fortune
Row reduces production cost, improves product quality.
3. paper uses ASA sizing agent under protecting paper of gypsum board of the present invention, maturation is fast on machine, sizing is stablized, quality is high；
Staple fiber uses high consistency beating technique, improves paper strength, reduces the useless dosage of raw material Sino-U.S.；It joined wet strength agent, improve wet
Expansion, so that intensity is still higher after paper is wetted during plaster plate making；Press section presses technology using novel boots, mentions
It is higher by squeezing mass dryness fraction, reduces drying portion steam consumption.In short, present invention process improves paper machine runnability, production cost is reduced,
Improve product quality.
Specific embodiment
The production technology of paper and lower paper on a kind of protecting paper of gypsum board, including pulping workshop section, slurrying workshop section and papermaking workshop section；
The first step, pulping workshop section, paper is broken under pulping workshop section and protecting paper of gypsum board including paper on protecting paper of gypsum board
Starch workshop section, wherein the pulping workshop section of paper on protecting paper of gypsum board includes the following steps: that packed waste paper first passes through chain mat machine
It is delivered to bale opener, rotary drum pulping machine is entered after waste paper is discongested out, after being passed through 35-40 DEG C of warm water, repulping of waste paper is at concentration
4% paper pulp, the rubbish discharge system such as plastics, cloth；Paper pulp is pumped into HC Cleaner, after removing bulk stone, squeezes into
It is spare to starch tower；
The pulping workshop section of paper includes OCC line pulping and ONP line pulping under protecting paper of gypsum board, wherein OCC line pulping includes
Following steps: packed waste paper first passes through chain mat machine conveying hydrabrusher, and after adding water and stirring size degradation, tail slurry is clear by waterpower
Slag machine and drum sieve recycled fiber, plastics discharge system；Good slurry is sent into HC Cleaner, after removing bulk stone, squeezes into slurry tower
It is spare；
ONP line pulping includes the following steps: that waste paper by chain mat machine, is delivered to rotary drum pulping machine, is passed through 35-40 DEG C of temperature
Water, while deinking chemicals are added: 0.8-1.0kg/ tons of waste paper of deinking agent, 25-30kg/ tons of waste paper of hydrogen peroxide, sodium hydroxide 20-
25kg/ tons of waste paper, 10-15kg/ tons of waste paper of sodium metasilicate, the paper pulp that size degradation is 4% at concentration, the rubbish such as plastics, cloth discharge system
System；Paper pulp is pumped into HC Cleaner, and after removing bulk stone, it is spare to squeeze into slurry tower；
Second step, slurrying workshop section, the system of paper under slurrying workshop section and protecting paper of gypsum board including paper on protecting paper of gypsum board
Starch workshop section, wherein the slurrying workshop section of paper on protecting paper of gypsum board, the slurry for including the following steps: that pulping workshop is come first pass through slightly
Sieve screening slurry, tail slurry send rotary drum pulping machine, plastic sheet discharge system back to by the fiber of slag draining and separating machine separator well；Good slurry is logical
Long, medium and short fibre stuff is formed after the classification of classifying screen twice, long stuff removes tiny gravel through too low dense scummer
Afterwards, slurry is further screened by fine screen, then polydisc thickener enters heat partition system after being concentrated into 10% mass concentration,
100-105 DEG C of temperature, disk mill gap 0.15mm are controlled, dispersion sicker to naked eyes can not identify, be beaten shape finally by mill
It is spare at the slurry that beating degree is 40 ± 2 ° of SR, concentration is 4%；Middle fibre stuff passes through low dense scummer, polydisc thickener, heat
After decentralized system, mill mashing, it is spare to form the slurry that beating degree is 40 ± 2 ° of SR, concentration is 4%；Staple fiber dense is removed through too low
It is spare that the slurry that concentration is 4% is formed after slag device and polydisc thickener；
The slurrying workshop section of paper under protecting paper of gypsum board, including the slurrying of OCC line and ONP line slurrying, wherein OCC line slurrying packet
Include following steps: the slurry that pulping workshop is come first passes through scalping screening slurry, and tail slurry passes through the fiber of slag draining and separating machine separator well
Send hydrabrusher, plastic sheet discharge system back to；After good slurry is classified by classifying screen, long and short fibre stuff, long fiber pulp are formed
Material further screens slurry by fine screen, then polydisc thickener is concentrated into 10% after too low dense scummer removes tiny gravel
Mass concentration after enter heat partition system, control 100-105 DEG C of temperature, disk mill gap 0.15mm, dispersion sicker to naked eyes
It can not identify, be beaten that form the slurry that beating degree is 40 ± 2 ° of SR, concentration is 4% spare finally by mill；Short stock warp
After too low dense scummer and polydisc thickener, it is standby that the slurry that beating degree is 40-43 ° of SR, concentration is 4% is formed by high consistency beating
With；
ONP line slurrying includes the following steps: that the slurry that pulping workshop is come first passes through scalping screening slurry, and tail slurry sends rotary drum back to
Pulper, good slurry enters flotation cell, by the ink flotation discharge system in newspaper, then removes tiny sand by low dense scummer
Slurry is further screened by fine screen after gravel, subsequently enters after polydisc thickener is concentrated into 10% mass concentration and enters heat partition
System controls 105-110 DEG C of temperature, disk mill gap 0.13mm, and dispersion sicker to naked eyes can not identify, it is standby to be finally sent into slurry tower
With；
Third step, papermaking workshop section, paper makes under papermaking workshop section and protecting paper of gypsum board including paper on protecting paper of gypsum board
Paper workshop section, wherein the papermaking workshop section of paper on protecting paper of gypsum board includes the following steps: that the slurry of slip house passes through streaming
After system, i.e. fan pump, pressurized screen, forms the slurry that concentration is 0.4%-0.8% and online is sprayed by head box, approach system adds
It is as follows to enter chemicals: 4kg/ tons of paper of starch, 5-10kg/ tons of 1-3kg/ tons of paper of wet strength agent, drying strengthening agent paper in starching being added before starching pump,
2.5-3kg/ tons of aluminum sulfate 15-20kg/ tons of paper, ASA sizing agent paper are added after fan pump, dry powder retention agent is added before pressurized screen
Filter aid 0.6kg/ tons of paper is added after pressurized screen for 0.3-0.4kg/ tons of paper.Wet end uses 3 layers of net (face, core, bottom), during surface layer is
Fiber vermicelli, core, bottom are long and short fiber 5:6 mixed slurry in mass ratio, are dehydrated by dewatering elements to 10-14% mass dryness fraction, pressure
Squeezing portion is made of big roller diameter+boots pressure, and splenium mass dryness fraction is 50% out, by front baking, table glue, after dry, batch, it is most multiple through rewinding machine afterwards
It is rolled into the paper roll of different size, into storehouse.Table glue surface, bottom starch concentration are 6%.
Control into paper water imbibition surface layer 20-30g/m2, bottom 30-50g/ m2, hot water infiltration 3000-3600s；
Preferably, in the chemicals that paper approach system is added on protecting paper of gypsum board, 2kg/ tons of paper of wet strength agent；
The papermaking workshop section of paper under protecting paper of gypsum board includes the following steps: that the slurry of slip house passes through approach system,
I.e. after fan pump, pressurized screen, forms the slurry that concentration is 0.4%-0.8% and online, approach system additionization are sprayed by head box
Product are as follows: 4kg/ tons of paper of starch, 10-15kg/ tons of 1-5kg/ tons of paper of wet strength agent, drying strengthening agent paper in starching, punching being added before starching pump
2.5-3kg/ tons of aluminum sulfate 15-20kg/ tons of paper, ASA sizing agent paper are added after stock pump, dry powder retention agent 0.3- is added before pressurized screen
Filter aid 0.6kg/ tons of paper is added after pressurized screen, while different dyes being added as needed for 0.4kg/ tons of paper.Wet end uses 4 layers
Net (face, lining, core, bottom), surface layer are Deinking Pulp vermicelli, and lining, core, bottom are long and short fiber according to mass ratio 6:4 mixed slurry, are led to
Dewatering elements are crossed to be dehydrated to 10-14% mass dryness fraction, press section is made of big roller diameter+boots pressure, out splenium mass dryness fraction be 50%, by front baking,
Table glue is dried afterwards, is batched, most afterwards through rewinding machine rewinding at the paper roll of different size, into storehouse.Table glue surface, bottom starch concentration
It is 6%.
Control into paper water imbibition surface layer 20-30g/ m2, bottom 30-40g/ m2, hot water infiltration 3000-3600s.
Preferably, in the chemicals that paper approach system is added under protecting paper of gypsum board, 4kg/ tons of paper of wet strength agent.
Embodiment produces paper on protecting paper of gypsum board
One, pilot project
Produce paper on protecting paper of gypsum board.
Two, process is tested
1. slurry pre-processes
OCC processing parameter: the slurry that pulping comes is divided into three kinds of long, medium and short fiber by classifying screen by scalping
Slurry.Long stuff through too low dense scummer, fine screen, polydisc thickener, heat partition system, 100-105 DEG C of heat partition temperature,
Disk mill gap 0.15mm is controlled spare in 40 ± 2 ° of SR by beating degree after mill；Middle fibre stuff passes through low dense scummer, more
After disk thickener, heat partition system, mill mashing, it is spare to form the slurry that beating degree is 40 ± 2 ° of SR, concentration is 4% or so；It is short
It is spare that fiber forms the slurry that concentration is 4% or so after too low dense scummer and polydisc thickener.
2. papermaking
1. wet end chemistry on the basis of existing chemicals, optimizes the use of ASA and gelatinized starch, meet water suction and hot water
Index is permeated, while introducing wet strength agent, is controlled into paper hygral expansion >=2.0%.
2. press section transform big roll-in squeezing+boots pressure as by the big roll-in squeezing of vacuum preloading+twice, test out squeezing mass dryness fraction and
The drying portion steam consumption.
Three, test data
1. wet strength agent is on probation
| Time | Data | Remarks |
| 7:00 | Hygral expansion 1.5% | |
| 8:00 | Hygral expansion 1.5% | 1.0kg/ tons of paper of wet strengthening agent |
| 9:00 | Hygral expansion 1.6% | |
| 10:00 | Hygral expansion 1.8% | |
| 11:00 | Hygral expansion 1.8% | |
| 12:00 | Hygral expansion 2.0% | 2.0kg/ tons of paper of wet strengthening agent |
| 13:00 | Hygral expansion 2.1% | |
| 14:00 | Hygral expansion 2.1% | |
| 15:00 | Hygral expansion 2.2% | |
| 16:00 | Hygral expansion 2.2% | 3.0kg/ tons of paper of wet strengthening agent |
| 17:00 | Hygral expansion 2.3% | |
| 18:00 | Hygral expansion 2.4% | |
| 19:00 | Hygral expansion 2.5% |
2. original press section is squeezed using the big roll-in of vacuum preloading+twice, mass dryness fraction 47% is squeezed out, and drying portion steam consumption is
1.76 tons of steam/ton paper after being changed to big roll-in squeezing+boots pressure, squeeze mass dryness fraction out and are increased to 50%, 1.61 tons of drying portion steam consumption
Steam/ton paper.
Four, test result analysis
1,2kg/ ton hour is added in wet strength agent, and at paper hygral expansion >=2.0%, when dosage increases, hygral expansion increases, but cost
Increase therewith, it is uneconomical.
2, the transformation of press section improves page and squeezes mass dryness fraction 3% out, and drying portion steam consumption reduces 8.5%, energy conservation effect
Fruit is obvious.
Five, conclusion
This test is paper on production Novel gypsum board mask paper, using novel internal sizing agent ASA, and in existing chemistry
Wet strength agent is increased on the basis of product, is improved into paper hygral expansion, so that intensity increases when gypsum sheet metal forming；The transformation of press section simultaneously
Papermaking steam consumption has been saved, production cost is reduced, has increased product quality；In addition, producing upper paper, formed, is used using three-layer network
Middle fibre stuff vermicelli, evenness is high, and low energy consumption.
Embodiment produces paper under protecting paper of gypsum board
One, pilot project
Produce paper under protecting paper of gypsum board.
Two, process is tested
1. slurry pre-processes
Deinking Pulp production line process parameter: according to different ratios of raw materials, deinking chemicals: deinking agent 0.8- are added in adjustment
1.0kg/ tons of waste paper, 25-30kg/ tons of waste paper of hydrogen peroxide, 20-25kg/ tons of waste paper of sodium hydroxide, 10-15kg/ tons of sodium metasilicate useless
Paper, other techniques are constant.
OCC processing parameter: the slurry that pulping comes controls length fibre classification mass ratio by scalping, classifying screen
For 6:4, long fibre passes through heat partition, and 100-105 DEG C of heat partition temperature, disk mill gap 0.15mm pass through beating degree control after mill
It makes spare in 40 ± 2 ° of SR；Staple fiber controls 40-43 ° of SR of beating degree after high consistency beating, other techniques are constant.
2. papermaking
(1) wet end chemistry optimizes the use of ASA and gelatinized starch on the basis of existing chemicals, meets water suction and hot water
Index is permeated, while introducing wet strength agent, is controlled into paper hygral expansion >=2.5%.
(2) press section transform big roll-in squeezing+boots pressure as by the big roll-in squeezing of vacuum preloading+twice, test out squeezing mass dryness fraction and
The drying portion steam consumption.
Three, test data
1. wet strength agent is on probation
| Time | Data | Remarks |
| 7:00 | Hygral expansion 1.5% | |
| 8:00 | Hygral expansion 1.6% | 1.0kg/ tons of paper of wet strengthening agent |
| 9:00 | Hygral expansion 1.7% | |
| 10:00 | Hygral expansion 1.7% | |
| 11:00 | Hygral expansion 1.8% | |
| 12:00 | Hygral expansion 2.0% | 2.0kg/ tons of paper of wet strengthening agent |
| 13:00 | Hygral expansion 2.1% | |
| 14:00 | Hygral expansion 2.2% | |
| 15:00 | Hygral expansion 2.2% | |
| 16:00 | Hygral expansion 2.2% | 3.0kg/ tons of paper of wet strengthening agent |
| 17:00 | Hygral expansion 2.3% | |
| 18:00 | Hygral expansion 2.4% | |
| 19:00 | Hygral expansion 2.5% | 4.0kg/ tons of paper of wet strengthening agent |
| 20:00 | Hygral expansion 2.5% | |
| 21:00 | Hygral expansion 2.6% | |
| 22:00 | Hygral expansion 2.6% | 5.0kg/ tons of paper of wet strengthening agent |
| 23:00 | Hygral expansion 2.6% | |
| 24:00 | Hygral expansion 2.6% |
2. original press section is squeezed using the big roll-in of vacuum preloading+twice, mass dryness fraction 46-47% is squeezed out, and drying portion steam disappears
Consumption is 1.80 tons of steam/ton paper, after being changed to big roll-in squeezing+boots pressure, squeezes mass dryness fraction out and is increased to 49-50%, drying portion steam consumption
1.64 tons of steam/ton paper.
Four, test result analysis
1. the proof test of wet strength agent can be seen that just be initially added into wet strengthening agent be 1.0kg/ tons of paper when, hygral expansion
Under increase rate, show that wet strength agent additional amount is low, is first reacted with the anionic trash in system, to reduce the knot with fiber
It closes；With the increase of wet strengthening agent, start to step up at paper hygral expansion, when dosage is 4kg/ tons of paper, hygral expansion reaches
Index request, then dosage is improved, hygral expansion is difficult to improve, and shows that system has been saturated, and excessive wet strength agent can not be with fibration
Reach using effect, while dosage increases, increased costs.
Go out to squeeze mass dryness fraction 3% 2. the transformation of press section improves page, drying portion steam consumption reduces 8.9%, energy conservation effect
Fruit is obvious.
Five, conclusion
This test is paper under production Novel gypsum board mask paper, combines slurrying staple fiber high consistency beating technique, uses
Novel internal sizing agent ASA, and wet strength agent is increased on the basis of existing chemicals, it improves at paper hygral expansion, so that plasterboard
Intensity increases when molding；Papermaking steam consumption has been saved in the transformation of press section simultaneously, reduces production cost, increases product quality.
Claims (6)
1. the production technology of paper and lower paper on a kind of protecting paper of gypsum board, it is characterised in that: including pulping workshop section, slurrying workshop section and
Papermaking workshop section；
Wherein, pulping workshop section includes the pulping workshop section of paper on protecting paper of gypsum board and the pulping workshop section of paper under protecting paper of gypsum board,
Slurrying workshop section includes the slurrying workshop section of paper on protecting paper of gypsum board and the slurrying workshop section of paper under protecting paper of gypsum board, papermaking workshop section packet
Include the papermaking workshop section of paper on protecting paper of gypsum board and the papermaking workshop section of paper under protecting paper of gypsum board；
Wherein, the pulping workshop section of paper includes OCC line pulping and ONP line pulping, paper under protecting paper of gypsum board under protecting paper of gypsum board
Slurrying workshop section include the slurrying of OCC line and ONP line slurrying；
The pulping workshop section of paper on protecting paper of gypsum board, include the following steps: packed waste paper first pass through chain mat machine be delivered to it is scattered
Chartered plane enters rotary drum pulping machine after discongesting out waste paper, after being passed through 35-40 DEG C of water, the paper pulp that repulping of waste paper is 4% at concentration, and modeling
Material, cloth rubbish discharge system；Paper pulp is pumped into HC Cleaner, and after removing bulk stone, it is spare to squeeze into slurry tower；
OCC line pulping under protecting paper of gypsum board in the pulping workshop section of paper, includes the following steps: that packed waste paper first passes through chain
Trigger conveys hydrabrusher, and after adding water and stirring size degradation, tail slurry passes through waterpower smoothing machine and drum sieve recycled fiber, plastics discharge
System；Good slurry is sent into HC Cleaner, and after removing bulk stone, it is spare to squeeze into slurry tower；
ONP line pulping under protecting paper of gypsum board in the pulping workshop section of paper includes the following steps: that waste paper passes through chain mat machine, conveying
To rotary drum pulping machine, it is passed through 35-40 DEG C of water, while deinking chemicals are added, the paper pulp that size degradation is 4% at concentration, plastics, cloth
Equal rubbish discharge system；Paper pulp is pumped into HC Cleaner, and after removing bulk stone, it is spare to squeeze into slurry tower；
The slurrying workshop section of paper on protecting paper of gypsum board includes the following steps: that the slurry that pulping workshop is come first passes through scalping screening slurry
Material, tail slurry send rotary drum pulping machine, plastic sheet discharge system back to by the fiber of slag draining and separating machine separator well；Good slurry by dividing twice
Long, medium and short fibre stuff is formed after grade sieve classification, long stuff is after too low dense scummer removes tiny gravel, by essence
Sieve further screens slurry, and then polydisc thickener enters heat partition system after being concentrated into 10% mass concentration, controls temperature
100-105 DEG C, disk mill gap 0.15mm disperse sicker, and being beaten finally by mill and forming beating degree is 40 ± 2 ° of SR, concentration
It is spare for 4% slurry；After middle fibre stuff is by low dense scummer, polydisc thickener, heat partition system, mill mashing, formed
The slurry that beating degree is 40 ± 2 ° of SR, concentration is 4% is spare；Staple fiber forms dense after too low dense scummer and polydisc thickener
Degree is spare for 4% slurry；
The slurry that OCC line slurrying under protecting paper of gypsum board in the slurrying workshop section of paper includes the following steps: that pulping workshop is come first passes through
Scalping screening slurry is crossed, tail slurry sends hydrabrusher, plastic sheet discharge system back to by the fiber of slag draining and separating machine separator well；It is good
After slurry is classified by classifying screen, long and short fibre stuff is formed, the slurrying of paper in the process and protecting paper of gypsum board of long stuff
It is spare to form the slurry that beating degree is 40 ± 2 ° of SR, concentration is 4% for the identical aftertreatment technology of long stuff in workshop section；It is short
Fibre stuff is after too low dense scummer and polydisc thickener, and by high consistency beating formation beating degree be 40-43 ° of SR, concentration is
4% slurry is spare；
The slurry that ONP line slurrying under protecting paper of gypsum board in the slurrying workshop section of paper includes the following steps: that pulping workshop is come first passes through
Scalping screening slurry is crossed, tail slurry sends rotary drum pulping machine back to, and good slurry enters flotation cell, by the ink flotation discharge system in newspaper,
Then after removing tiny gravel by low dense scummer, slurry is further screened by fine screen, it is dense to subsequently enter polydisc thickener
Enter heat partition system after being reduced to 10% mass concentration, control 105-110 DEG C of temperature, disk mill gap 0.13mm, disperses gluing
It is spare to be finally sent into slurry tower for object；
The papermaking workshop section of paper and lower paper on protecting paper of gypsum board, include the following steps: on protecting paper of gypsum board paper slip house and
The slurry that paper slip house comes under protecting paper of gypsum board is respectively formed that is, after fan pump, pressurized screen by approach system respectively
Concentration is the slurry of 0.4%-0.8%, is sprayed surf the Internet by head box respectively, and approach system is separately added into chemicals: before starching pump
Starch, wet strength agent, drying strengthening agent in starching is added, aluminum sulfate, ASA sizing agent are added after fan pump, dry powder retention is added before pressurized screen
Filter aid is added after pressurized screen in agent, respectively by being dehydrated by dewatering elements to 10-14% mass dryness fraction, pressure after wet end composite molding
Squeezing portion is made of big roller diameter+boots pressure, and splenium mass dryness fraction is 50% out, by front baking, table glue, after dry, batch, it is most multiple through rewinding machine afterwards
It is rolled into the paper roll of different size, into storehouse；
Gauze portion uses face, core, bottom three-layer network on protecting paper of gypsum board, and surface layer is middle fiber vermicelli, and core, bottom are long and short fiber
5:6 mixed slurry in mass ratio；Gauze portion uses face, lining, core, bottom four-layer network under protecting paper of gypsum board, and surface layer is Deinking Pulp extension
Face, lining, core, bottom are long and short fiber according to mass ratio 6:4 mixed slurry.
2. the production technology of paper and lower paper on a kind of protecting paper of gypsum board according to claim 1, it is characterised in that: gypsum
The deinking chemicals in ONP line pulping under plate mask paper in the pulping workshop section of paper include: 0.8-1.0kg/ tons of waste paper of deinking agent,
25-30kg/ tons of waste paper of hydrogen peroxide, 20-25kg/ tons of waste paper of sodium hydroxide, 10-15kg/ tons of waste paper of sodium metasilicate.
3. the production technology of paper and lower paper on a kind of protecting paper of gypsum board according to claim 1, it is characterised in that: gypsum
The chemicals that paper and Xia Zhizhong papermaking workshop section's approach system are added on plate mask paper is respectively as follows: paper streaming system on protecting paper of gypsum board
The chemicals that system is added: 4kg/ tons of paper of starch, 1-3kg/ tons of paper of wet strength agent, 5-10kg/ tons of paper of drying strengthening agent, aluminum sulfate 15- in starching
20kg/ tons of paper, 2.5-3kg/ tons of paper of ASA sizing agent, 0.3-0.4kg/ tons of paper of dry powder retention agent, 0.6kg/ tons of paper of filter aid；Stone
The chemicals that paper approach system is added under cream plate mask paper: 4kg/ tons of paper of starch, 1-5kg/ tons of paper of wet strength agent, drying strengthening agent in starching
10-15kg/ tons of paper, 15-20kg/ tons of paper of aluminum sulfate, 2.5-3kg/ tons of paper of ASA sizing agent, 0.3-0.4kg/ tons of dry powder retention agent
Paper, 0.6kg/ tons of paper of filter aid.
4. the production technology of paper and lower paper on a kind of protecting paper of gypsum board according to claim 1, it is characterised in that: gypsum
In the chemicals that paper approach system is added on plate mask paper, 2kg/ tons of paper of wet strength agent；Paper approach system adds under protecting paper of gypsum board
In the chemicals entered, 4kg/ tons of paper of wet strength agent.
5. the production technology of paper and lower paper on a kind of protecting paper of gypsum board according to claim 1, it is characterised in that: gypsum
Paper and lower paper table glue surface, bottom starch concentration are 6% on plate mask paper, and control is 20-30g/m at paper water imbibition surface layer2,
Hot water infiltration is 3000-3600s, paper bottom 30-50g/m on protecting paper of gypsum board2, paper bottom 30- under protecting paper of gypsum board
40g/m2。
6. the production technology of paper and lower paper on a kind of protecting paper of gypsum board according to claim 1, it is characterised in that: gypsum
Different dyes are added in the papermaking workshop section of paper under plate mask paper.
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| CN108035199A (en) * | 2017-12-11 | 2018-05-15 | 福建省联盛纸业有限责任公司 | A kind of craft paper and preparation method thereof |
| CN108978327B (en) * | 2018-08-01 | 2021-04-16 | 联盛纸业（龙海）有限公司 | Production method for producing corrugated paper by replacing OCC pulp with wood chip hot ground pulp |
| CN109024057B (en) * | 2018-08-03 | 2021-04-16 | 联盛纸业（龙海）有限公司 | Production method for producing kraft liner board by replacing OCC pulp with wood chip hot ground pulp |
| CN109577058B (en) * | 2018-11-30 | 2021-02-19 | 玖龙纸业（太仓）有限公司 | Production equipment and production method of single-layer craft paper |
| CN110552236B (en) * | 2019-09-09 | 2021-09-24 | 杭州海鑫纸业有限公司 | Black paper and preparation process thereof |
| CN111501391A (en) * | 2020-04-30 | 2020-08-07 | 山鹰国际控股股份公司 | Method for improving slurry quality |
| CN113481750B (en) * | 2021-07-26 | 2023-03-14 | 东莞顺裕纸业有限公司 | Pulping process with good slag removal effect |
| CN117107554A (en) * | 2023-10-18 | 2023-11-24 | 山东博汇纸业股份有限公司 | Colored anti-counterfeiting gypsum plaster board protective paper and production method thereof |
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| CN101818465A (en) * | 2010-04-26 | 2010-09-01 | 泰山石膏股份有限公司 | Process for making light-weight high-strength common gypsum board mask paper |
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| JP3487172B2 (en) * | 1998-05-21 | 2004-01-13 | 王子製紙株式会社 | Base paper for gypsum board |
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