CN107841905A - The production technology of paper grade (stock) surface size - Google Patents

The production technology of paper grade (stock) surface size Download PDF

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CN107841905A
CN107841905A CN201711057441.5A CN201711057441A CN107841905A CN 107841905 A CN107841905 A CN 107841905A CN 201711057441 A CN201711057441 A CN 201711057441A CN 107841905 A CN107841905 A CN 107841905A
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surface size
enzyme
starch
cationic starch
stock
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CN107841905B (en
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杜汉民
杜汉杰
余行宝
黄奇志
熊国平
吴如双
刘凯
郑铭华
郭政
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Dongguan Taichang Paper Co Ltd
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Dongguan Taichang Paper Co Ltd
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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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P19/00—Preparation of compounds containing saccharide radicals
    • C12P19/04—Polysaccharides, i.e. compounds containing more than five saccharide radicals attached to each other by glycosidic bonds
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P19/00—Preparation of compounds containing saccharide radicals
    • C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
    • 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
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12

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  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Microbiology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biotechnology (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Genetics & Genomics (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Paper (AREA)

Abstract

The invention discloses a kind of production technology of paper grade (stock) surface size, including prepare synthetic starch enzyme step, mixing pre-reaction step, prepare liquid synthetic starch enzyme step, starch cooking step, mixing step, emulsifying step, preliminary biological degeneration step and high speed biological degeneration step.The present invention can continuous production surface size, production efficiency is high, it is not necessary to which a few hours infusion, production more save, and reduce production cost；And the performance for producing obtained surface size is more preferable, sizing material retention reaches 100%, reduces usage amount and yield, improves printing performance, durability, wearability, oil-resistant characteristic and the water repelling property of paper, production process clean environment firendly is pollution-free.

Description

The production technology of paper grade (stock) surface size
Technical field
The present invention relates to paper grade (stock) surface size technical field, more particularly, to a kind of life of paper grade (stock) surface size Production. art.
Background technology
Surface size press generally uses in the manufacturing enterprise of wrapping paper industry, particularly boxboard and high-strength watt of distracted paper, table Face sizing applicator needs to use paper grade (stock) surface size, that is, has top sizing just to have starch cook.
Paper grade (stock) surface size is one of kind being most widely used in current Cypres, is applied with other surfaces Jelly is compared, and starch derivatives has aboundresources, cheap, pure plant raw material, nontoxic peace as Cypres Congruent unique advantage.In order to increase the intake of starch, the solid content of starch solution is improved, improves starch surface sizing effect For fruit, it is necessary to reduce the viscosity of size-press starch, current most of enterprise is to produce to obtain paper grade (stock) surface using starch cook method Glue application solution.
Medium-sized and small enterprises generally use gap boiling at present, i.e., with one pot of ground cooking starch of digester one pot, every pot added The chemicals such as ammonium sulfate and alkali, with will passing through for the ten a few houres infusion of each pot of starch, can just obtain, which can be used in surface, applies The paper grade (stock) surface size of glue machine.There is problems with the paper grade (stock) surface size that this method is produced to obtain, during boiling Between it is long, cost is high, and the difficult control of degree of oxidation, producing process has pollution to environment.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of production work of paper grade (stock) surface size Skill, it.
To achieve these goals, the technical solution adopted in the present invention is：A kind of production of paper grade (stock) surface size Technique, comprise the following steps,
Synthetic starch enzyme step is prepared, by weight percentage, puts into following component in the first reactor, 40~50% Alpha-amylase, 20~30% adenosine diphosphate glucose, 3~5% 4,5- imidazole-2-carboxylic acids, 5~8% detergent alkylate Sodium sulfonate, 2~3% calcium gluconate, 2~3% calcium acetate, 2~3% natural ox glue and terpinol surplus；Sealing is steamed Boil 1 hour, temperature in the kettle is controlled at 50~60 DEG C, controls the agitator in kettle to turn with 50~100r/min in digestion process Speed stirring, obtains synthetic starch enzyme, is transferred to jelly storehouse and saves backup, storage temperature is -5~0 DEG C；
Pre-reaction step is mixed, is put into after cationic starch is sieved in stirring bucket stirring, first is taken out from freezing in storehouse Part synthetic starch enzyme, and slowly being put into stirring bucket by constant displacement pump, cationic starch are total with first part of synthetic starch enzyme Part by weight is 10:1~2, in whipping process, temperature control in stirring bucket is at 30~40 DEG C, the agitator in stirring bucket Rotating speed control in 300~500r/min, stir 20~30 minutes, cationic starch is hydrolyzed and decomposed in stirring bucket mild or moderate, Its viscosity is lifted 30~40% after being sufficiently stirred, obtains premixing cationic starch；
Liquid synthetic starch enzyme step is prepared, is synthesized from freezing storehouse second part of synthetic starch enzyme of taking-up and being separately fabricated to liquid Amylase, by weight percentage, by second part of synthetic starch enzyme 70~80%, terpinol 10~20%, 4,5- imidazole-2-carboxylic acids 6 ~8% and water surplus be thoroughly mixed, obtain the liquid synthetic starch enzyme of liquid form；
Starch cooking step, simultaneously continuously slowly to the second reactor upper opening be pumped into distilled water and premixing sun from Sub- starch, the agitator in kettle is controlled to be stirred with 50~100r/min rotating speed, in whipping process, by the second reactor Temperature control is at 30~40 DEG C, and the speed that is pumped into of premixing cationic starch is 50~100 Grams Per Seconds, and distilled water is pumped into speed as 5 ~10 Grams Per Seconds, pressure-air, liter/second of pump gas amount 1000~2000, to make the second reactor are pumped into from the bottom of the second reactor Interior premixing cationic starch is fully gelatinized, while amylase is fully bred, the gelatinization cationic starch being gelatinized completely；
Mixing step, gelatinization cationic starch being pumped to twin screw compounder and is kneaded, screw speed is 50~ 80r/min, the temperature control in the screw tube of twin screw compounder is at 50~60 DEG C, and the leading portion Stress control in screw tube is 5 ~10Mpa, stage casing Stress control makes the amylase in gelatinization cationic starch decentralized in 3~4Mpa, and is evenly distributed, together When in leading portion and stage casing suppress amylase, suppress gelatinization cationic starch and produce product denaturation；
Emulsifying step, closed by high-pressure hydraulic pump to the input interface pumping liquid for the posterior segment for being arranged on twin screw compounder Into amylase, the speed that is pumped into of liquid synthetic starch enzyme is 2~5 Grams Per Seconds, the back segment Stress control in screw tube 1.5~ 2Mpa, the back segment temperature control in screw tube make the cationic starch in gelatinization cationic starch start to orient at 60~70 DEG C Biological degeneration, form slight liquefied emulsification cationic starch；
Preliminary biological degeneration step, emulsification cation is sprayed to conveyance conduit by the extrusion of twin screw compounder and formed sediment Powder, the emulsification cationic starch being fed forward in conveyance conduit, enter after pressure is discharged and accelerate degenerative process, in delivery pipe Preliminary biological degeneration is completed in road；
The emulsification cationic starch for completing preliminary biological degeneration is transported to biology by high speed biological degeneration step, conveyance conduit Pond is denatured, the temperature control in biological degeneration pond is at 50~60 DEG C, and biological degeneration is mixed slowly in pond by agitator, agitator Rotating speed is 50~80r/min, and the amylase entered in the emulsification cationic starch in biological degeneration pond is activated, and emulsifies cation Starch fast liquefying, viscosity reduce rapidly, biological degeneration process are completed in 8~10 minutes, and obtain surface size；
Enzyme deactivation step, the surface size in biological degeneration pond is pumped in the enzyme deactivation metallic conduit of enzyme deactivation room, passed through Electromagnetic heater installed in enzyme deactivation metallic conduit periphery heats enzyme deactivation metallic conduit, by the enzyme deactivation gold that length is 5~10 meters The temperature control of metal conduit completes enzyme deactivation operation, then be pumped to the feed flow of surface size press at 500~600 DEG C in enzyme deactivation room Stand；
Finished product, finished product paper grade (stock) surface size is obtained in the liquid supply station of surface size press, and be the confession of surface size press Liquid station provides surface size without interruption.
In further technical scheme, in the enzyme deactivation step, some stratons are distributed with along short transverse in enzyme deactivation room Metallic conduit, each straton metallic conduit are distributed the interest metal conduit of several straight types, and make two neighboring interest metal conduit it Between keep 50~80cm spacing, the internal diameter of each interest metal conduit selects 5~15cm, and be sequentially connected with each interest metal conduit and Form the enzyme deactivation metallic conduit.
In further technical scheme, by enzyme deactivation metallic conduit connection surface glue application solution conveyance conduit, and make top sizing Liquid conveyance conduit sequentially passes through the white water chest and clear water reserviors in paper mill, is carried while the temperature of paper grade (stock) surface size is reduced The water temperature of high white water chest and clear water reserviors, and by the temperature control of surface size at 40~50 DEG C, to stable qualitatively papermaking Use surface size.
It is described to prepare synthetic starch enzyme step in further technical scheme, by weight percentage, in the first reactor Put into following component, 42~53% alpha-amylase, 22~35% adenosine diphosphate glucose, 3~4% 4,5- imidazoles two Carboxylic acid, 5~6% neopelex, 2~3% calcium gluconate, 2~3% calcium acetate, 2~3% it is natural Ox glue and terpinol surplus.
The invention has the advantages that compared with the prior art,：The present invention can continuous production surface size, production Efficiency high, it is not necessary to which a few hours infusion, production more save, and reduce production cost；And produce the property of obtained surface size Can be more preferable, sizing material retention reaches 100%, reduces usage amount and yield, improves the printing performance of paper, durability, wear-resisting Property, oil-resistant characteristic and water repelling property, production process clean environment firendly is pollution-free.
Embodiment
As described below is only presently preferred embodiments of the present invention, is not intended to limit the scope of the present invention.
A kind of production technology of paper grade (stock) surface size, comprises the following steps,
Synthetic starch enzyme step is prepared, by weight percentage, puts into following component in the first reactor, 40~50% Alpha-amylase, 20~30% adenosine diphosphate glucose, 3~5% 4,5- imidazole-2-carboxylic acids, 5~8% detergent alkylate Sodium sulfonate, 2~3% calcium gluconate, 2~3% calcium acetate, 2~3% natural ox glue and terpinol surplus；Sealing is steamed Boil 1 hour, temperature in the kettle is controlled at 50~60 DEG C, controls the agitator in kettle to turn with 50~100r/min in digestion process Speed stirring, obtains synthetic starch enzyme, is transferred to jelly storehouse and saves backup, storage temperature is -5~0 DEG C.Wherein, the component of amylase In, alpha-amylase, adenosine diphosphate glucose, calcium gluconate and calcium acetate be make starch produce biological degeneration it is main into Point, and the ox glue and terpinol wherein placed, the speed of cationic starch biological degeneration can be made to lift 3~5 times, and cation The better quality of the surface size obtained after starch biological degeneration, 0.005 is reduced in the thickness that paper for surface sizing is formed ~0.01mm, and sizing material retention reaches 100%, the retention of existing surface size is 70~80%, therefore can be saved The usage amount of surface size, yield is reduced, plain boiled water becomes more to clean, and reduces the caused pollution sources of production process, also The oil-resistant characteristic and water repelling property of paper can be improved, improves the intensity of paper；And neopelex and 4,5- imidazoles two Carboxylic acid can then improve the printing performance of paper, improve the durability and wearability of paper.
The formula of preferable synthetic starch enzyme, by weight percentage, put into following component in the first reactor, 42~ 53% alpha-amylase, 22~35% adenosine diphosphate glucose, 3~4% 4,5- imidazole-2-carboxylic acids, the 12 of 5~6% Sodium alkyl benzene sulfonate, 2~3% calcium gluconate, 2~3% calcium acetate, 2~3% natural ox glue and terpinol surplus.
Pre-reaction step is mixed, is put into after cationic starch is sieved in stirring bucket stirring, first is taken out from freezing in storehouse Part synthetic starch enzyme, and slowly being put into stirring bucket by constant displacement pump, cationic starch are total with first part of synthetic starch enzyme Part by weight is 10:1~2, in whipping process, temperature control in stirring bucket is at 30~40 DEG C, the agitator in stirring bucket Rotating speed control in 300~500r/min, stir 20~30 minutes, cationic starch is hydrolyzed and decomposed in stirring bucket mild or moderate, Its viscosity is lifted 30~40% after being sufficiently stirred, obtains premixing cationic starch；
Liquid synthetic starch enzyme step is prepared, is synthesized from freezing storehouse second part of synthetic starch enzyme of taking-up and being separately fabricated to liquid Amylase, by weight percentage, by second part of synthetic starch enzyme 70~80%, terpinol 10~20%, 4,5- imidazole-2-carboxylic acids 6 ~8% and water surplus be thoroughly mixed, obtain the liquid synthetic starch enzyme of liquid form；
Starch cooking step, simultaneously continuously slowly to the second reactor upper opening be pumped into distilled water and premixing sun from Sub- starch, the agitator in kettle is controlled to be stirred with 50~100r/min rotating speed, in whipping process, by the second reactor Temperature control is at 30~40 DEG C, and the speed that is pumped into of premixing cationic starch is 50~100 Grams Per Seconds, and distilled water is pumped into speed as 5 ~10 Grams Per Seconds, pressure-air, liter/second of pump gas amount 1000~2000, to make the second reactor are pumped into from the bottom of the second reactor Interior premixing cationic starch is fully gelatinized, while amylase is fully bred, the gelatinization cationic starch being gelatinized completely；
Mixing step, gelatinization cationic starch being pumped to twin screw compounder and is kneaded, screw speed is 50~ 80r/min, the temperature control in the screw tube of twin screw compounder is at 50~60 DEG C, and the leading portion Stress control in screw tube is 5 ~10Mpa, stage casing Stress control make the amylase in gelatinization cationic starch decentralized, and be evenly distributed in 3~4Mpa.
Wherein, in the molecule of alpha-amylase containing combination considerably strong calcium ion, this calcium ion be not direct The formation of enzyme-substrate complex compound is participated in, its function is to maintain the structure of enzyme, makes enzyme that there is maximum stability and highest to live Property.But in mixing step, particularly under high pressure effect, 4,5- imidazole-2-carboxylic acids and neopelex can shadows The stability of this calcium ion is rung, lifts the activity of this calcium ion, therefore the stability of enzyme declines, activity reduces, therefore 4, 5- imidazole-2-carboxylic acids and neopelex can play the enzyme effect for suppressing amylase, but can excite the numerous of amylase Speed is grown, i.e., suppresses amylase in leading portion and stage casing, suppresses gelatinization cationic starch and produces product denaturation, put forward its reproduction speed Rise 2~3 times.
Emulsifying step, closed by high-pressure hydraulic pump to the input interface pumping liquid for the posterior segment for being arranged on twin screw compounder Into amylase, the speed that is pumped into of liquid synthetic starch enzyme is 2~5 Grams Per Seconds, the back segment Stress control in screw tube 1.5~ 2Mpa, the back segment temperature control in screw tube make the cationic starch in gelatinization cationic starch start to orient at 60~70 DEG C Biological degeneration, form slight liquefied emulsification cationic starch；
Preliminary biological degeneration step, emulsification cation is sprayed to conveyance conduit by the extrusion of twin screw compounder and formed sediment Powder, the emulsification cationic starch being fed forward in conveyance conduit, enter after pressure is discharged and accelerate degenerative process, in delivery pipe Preliminary biological degeneration is completed in road；
The emulsification cationic starch for completing preliminary biological degeneration is transported to biology by high speed biological degeneration step, conveyance conduit Pond is denatured, the temperature control in biological degeneration pond is at 50~60 DEG C, and biological degeneration is mixed slowly in pond by agitator, agitator Rotating speed is 50~80r/min, terpinol, neopelex and 4,5- imidazole-2-carboxylic acid can not shadows again after pressure relief The calcium ion of the molecule of alpha-amylase is rung, loses and suppresses amylase in synthetic starch enzyme, but intensifies effect, therefore, is entered It is activated to the amylase in the emulsification cationic starch in biological degeneration pond, emulsifies cationic starch fast liquefying, viscosity is rapid Reduce, biological degeneration process was completed in 8~10 minutes, and obtain surface size；High speed biological degeneration makes emulsification cation The denaturation of starch is more thorough and complete, and the performance of surface size is also more preferable.
Enzyme deactivation step, the surface size in biological degeneration pond is pumped in the enzyme deactivation metallic conduit of enzyme deactivation room, passed through Electromagnetic heater installed in enzyme deactivation metallic conduit periphery heats enzyme deactivation metallic conduit, by the enzyme deactivation gold that length is 5~10 meters The temperature control of metal conduit completes enzyme deactivation operation, then be pumped to the feed flow of surface size press at 500~600 DEG C in enzyme deactivation room Stand；Some straton metallic conduits are distributed with along short transverse in enzyme deactivation room, each straton metallic conduit is distributed several straight types Interest metal conduit, and make the spacing that 50~80cm is kept between two neighboring interest metal conduit, the internal diameter of each interest metal conduit 5~15cm is selected, and each interest metal conduit is sequentially connected with and is formed the enzyme deactivation metallic conduit.
By enzyme deactivation metallic conduit connection surface glue application solution conveyance conduit, and surface size conveyance conduit is sequentially passed through and make The white water chest and clear water reserviors of paper plant, the water of white water chest and clear water reserviors is improved while the temperature of paper grade (stock) surface size is reduced Temperature, and by the temperature control of surface size at 40~50 DEG C, to stable qualitatively paper grade (stock) surface size.
Finished product, finished product paper grade (stock) surface size is obtained in the liquid supply station of surface size press, and be the confession of surface size press Liquid station provides surface size without interruption.
Above content is only presently preferred embodiments of the present invention, for one of ordinary skill in the art, according to the present invention's Thought, there will be changes, this specification content should not be construed as to the present invention in specific embodiments and applications Limitation.

Claims (4)

  1. A kind of 1. production technology of paper grade (stock) surface size, it is characterised in that：Comprise the following steps,
    Synthetic starch enzyme step is prepared, by weight percentage, following component, 40~50% α-shallow lake are put into the first reactor Powder enzyme, 20~30% adenosine diphosphate glucose, 3~5% 4,5- imidazole-2-carboxylic acids, 5~8% DBSA Sodium, 2~3% calcium gluconate, 2~3% calcium acetate, 2~3% natural ox glue and terpinol surplus；Sealed steam cooking 1 is small When, temperature in the kettle is controlled at 50~60 DEG C, controls the agitator in kettle to be stirred with 50~100r/min rotating speed in digestion process Mix, obtain synthetic starch enzyme, be transferred to jelly storehouse and save backup, storage temperature is -5~0 DEG C；
    Pre-reaction step is mixed, is put into after cationic starch is sieved in stirring bucket stirring, first part of conjunction is taken out from freezing in storehouse Slowly put into stirring bucket into amylase, and by constant displacement pump, the gross weight of cationic starch and first part of synthetic starch enzyme Ratio is 10:1~2, in whipping process, the temperature control in stirring bucket is at 30~40 DEG C, turn of the agitator in stirring bucket Speed control is hydrolyzed and decomposed in stirring bucket mild or moderate in 300~500r/min, stirring 20~30 minutes, cationic starch, fully Its viscosity is lifted 30~40% after stirring, obtains premixing cationic starch；
    Liquid synthetic starch enzyme step is prepared, second part of synthetic starch enzyme is taken out from jelly storehouse and is separately fabricated to liquid synthetic starch Enzyme, by weight percentage, by second part of synthetic starch enzyme 70~80%, terpinol 10~20%, 4,5- imidazole-2-carboxylic acids 6~ 8% and water surplus be thoroughly mixed, obtain the liquid synthetic starch enzyme of liquid form；
    Starch cooking step, simultaneously continuously slowly it is pumped into distilled water to the second reactor upper opening and premixing cation forms sediment Powder, the agitator in kettle is controlled to be stirred with 50~100r/min rotating speed, in whipping process, by the temperature in the second reactor Control is at 30~40 DEG C, and the speed that is pumped into of premixing cationic starch is 50~100 Grams Per Seconds, and distilled water is pumped into speed as 5~10 Grams Per Second, pressure-air, liter/second of pump gas amount 1000~2000, to make in the second reactor are pumped into from the bottom of the second reactor Premixing cationic starch is fully gelatinized, while amylase is fully bred, the gelatinization cationic starch being gelatinized completely；
    Mixing step, gelatinization cationic starch is pumped to twin screw compounder and is kneaded, screw speed is 50~80r/ Min, the temperature control in the screw tube of twin screw compounder at 50~60 DEG C, leading portion Stress control in screw tube 5~ 10Mpa, stage casing Stress control makes the amylase in gelatinization cationic starch decentralized in 3~4Mpa, and is evenly distributed, simultaneously Suppress amylase in leading portion and stage casing, suppress gelatinization cationic starch and produce product denaturation；
    Emulsifying step, synthesized and formed sediment to the input interface pumping liquid for the posterior segment for being arranged on twin screw compounder by high-pressure hydraulic pump Powder enzyme, the speed that is pumped into of liquid synthetic starch enzyme is 2~5 Grams Per Seconds, and the back segment Stress control in screw tube is in 1.5~2Mpa, spiral shell Back segment temperature control in bar cylinder makes the cationic starch in gelatinization cationic starch start to orient biological change at 60~70 DEG C Property, form slight liquefied emulsification cationic starch；
    Preliminary biological degeneration step, emulsification cationic starch is sprayed to conveyance conduit by the extrusion of twin screw compounder, The emulsification cationic starch being fed forward in conveyance conduit, enter after pressure is discharged and accelerate degenerative process, in conveyance conduit Complete preliminary biological degeneration；
    The emulsification cationic starch for completing preliminary biological degeneration is transported to biological degeneration by high speed biological degeneration step, conveyance conduit Pond, the temperature control in biological degeneration pond is at 50~60 DEG C, and biological degeneration is mixed slowly in pond by agitator, the rotating speed of agitator For 50~80r/min, the amylase entered in the emulsification cationic starch in biological degeneration pond is activated, and emulsifies cationic starch Fast liquefying, viscosity reduce rapidly, biological degeneration process are completed in 8~10 minutes, and obtain surface size；
    Enzyme deactivation step, the surface size in biological degeneration pond is pumped in the enzyme deactivation metallic conduit of enzyme deactivation room, passes through installation Electromagnetic heater in enzyme deactivation metallic conduit periphery heats enzyme deactivation metallic conduit, by the enzyme deactivation metal tube that length is 5~10 meters The temperature control in road completes enzyme deactivation operation, then be pumped to the liquid supply station of surface size press at 500~600 DEG C in enzyme deactivation room；
    Finished product, finished product paper grade (stock) surface size is obtained in the liquid supply station of surface size press, and be the liquid supply station of surface size press Surface size without interruption is provided.
  2. A kind of 2. production technology of paper grade (stock) surface size according to claim 1, it is characterised in that：The enzyme deactivation step In rapid, some straton metallic conduits are distributed with along short transverse in enzyme deactivation room, it is straight that each straton metallic conduit is distributed several The interest metal conduit of type, and make the spacing that 50~80cm is kept between two neighboring interest metal conduit, each interest metal conduit it is interior Footpath selects 5~15cm, and each interest metal conduit is sequentially connected with and is formed the enzyme deactivation metallic conduit.
  3. A kind of 3. production technology of paper grade (stock) surface size according to claim 1, it is characterised in that：By enzyme deactivation metal Tube connection surface glue application solution conveyance conduit, and make white water chest and clear water of the surface size conveyance conduit sequentially through paper mill Pond, improves the water temperature of white water chest and clear water reserviors while the temperature of paper grade (stock) surface size is reduced, and by surface size Temperature control at 40~50 DEG C, to stable qualitatively paper grade (stock) surface size.
  4. A kind of 4. production technology of paper grade (stock) surface size according to claim 1 or 2, it is characterised in that：The system Standby synthetic starch enzyme step, by weight percentage, put into following component in the first reactor, 42~53% alpha-amylase, 22~35% adenosine diphosphate glucose, 3~4% 4,5- imidazole-2-carboxylic acids, 5~6% neopelex, 2 ~3% calcium gluconate, 2~3% calcium acetate, 2~3% natural ox glue and terpinol surplus.
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CN110284362A (en) * 2018-03-19 2019-09-27 金东纸业（江苏）股份有限公司 Size-press starch and preparation method thereof

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CN101429743A (en) * 2008-12-17 2009-05-13 安徽山鹰纸业股份有限公司 Production method of surface sizing agent, sizing agent and use thereof
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CN110284362B (en) * 2018-03-19 2022-06-17 金东纸业（江苏）股份有限公司 Sizing starch and preparation method thereof

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