CN106400603B - A kind of preparation method of grease proofing food wrapper - Google Patents
A kind of preparation method of grease proofing food wrapper Download PDFInfo
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- CN106400603B CN106400603B CN201610917994.2A CN201610917994A CN106400603B CN 106400603 B CN106400603 B CN 106400603B CN 201610917994 A CN201610917994 A CN 201610917994A CN 106400603 B CN106400603 B CN 106400603B
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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
- D21H27/10—Packing paper
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/03—Polysaccharides or derivatives thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/03—Polysaccharides or derivatives thereof
- D06M15/05—Cellulose or derivatives thereof
-
- 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
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/28—Organic non-cellulose fibres from natural polymers
- D21H13/30—Non-cellulose polysaccharides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/005—Microorganisms or enzymes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- 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
-
- 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
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/32—Polyesters
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Paper (AREA)
Abstract
The invention discloses a kind of preparation method of grease proofing food wrapper, comprise the following steps：Acid fiber by polylactic modification：Acid fiber by polylactic is configured to the aqueous solution, heated, adjusts pH；Then sodium alginate and microcrystalline cellulose are added, is stirred after ultrasound, obtains acid fiber by polylactic solution；Slurry processing：Xylanase is added in slurry, mashing, obtains mixed slurry；Manufacture paper with pulp：After the acid fiber by polylactic solution obtained in acid fiber by polylactic modification is diluted, add in mixed slurry, be well mixed, then add chitosan, fento cellulose and Ludox, dehydration forming, obtain wet web；Obtain grease proofing food wrapper：Carboxymethyl chitosan solution and cationic guar solution are prepared respectively and is mixed, and top sizing is carried out to the wet web obtained in step of manufacturing paper with pulp, dries, obtains grease proofing food wrapper.The present invention uses natural polymer auxiliary agent, and production method is simple, safe and non-toxic evil, has good oil preventing performance and higher surface strength into paper.
Description
Technical field
The invention belongs to technical field of preparation of specialty paper, and in particular to a kind of preparation method of grease proofing food wrapper.
Background technology
The main purpose of packaging for foodstuff is the hygienic quality that must assure that food as commodity during storing and transporting and be edible
And quality and flavor.Grease proofing food wrapper also requires that grease-proof absorbs infiltration, and defend in addition to the performance for meeting wrapping paper
Raw, sterile, pollution-free impurity etc., it is the speciality paper with high added value.
Therefore develop oil resistant, meet the paper for packaged food of food packaging safety requirement, can meet that packaging for foodstuff is pacified
Full hygienic requirements, the safe class of packaging for foodstuff is lifted, there is higher economic benefit and social benefit.
The oil-proofing agent of the best fluorine element lipid of oil-proofing agent effect at present on paper product, has an excellent oil preventing performance, but by
It is high molecular polymer in it, exists and be difficult to biodegradation, is not belonging to the development category of Green Chemistry, recycling economy.Thus open
One kind is sent all using natural polymerses, is manufactured paper with pulp by the modification to natural polymer, compounding, is produced grease proofness
Grease proofing food wrapper good, that intensity is high, smoothness is good is that very have realistic meaning.
The content of the invention
The shortcomings that in order to overcome above-mentioned prior art, it is an object of the invention to provide a kind of food bag with grease proofness
Paper method is filled, after handling acid fiber by polylactic, with total chlorine free bleaching commodity softwood pulp and bamboo pulp with copying, reduces into paper
Aperture, and be molded using three kinds of fiber interpenetrating networks, increase the compactness of paper, improve tightness, improve page characteristic；Using shell
Glycan, fento cellulose, Ludox/ternary system, improve into the uniform performance of paper, improve paper strength, and utilize chitosan
With the property of fento cellulose, the grease proofness of paper is improved；And use carboxymethyl chitosan and cation guar gum
Top sizing, can greatly improve the surface strength of paper, and reach grease proofing effect.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of preparation method of grease proofing food wrapper, comprises the following steps：
Acid fiber by polylactic modification：Acid fiber by polylactic is configured to the mass percent 10%-20% aqueous solution, heated,
Adjust pH；Then sodium alginate and microcrystalline cellulose are added, is stirred after ultrasound, obtains acid fiber by polylactic solution；
Slurry processing：Under the conditions of 30 DEG C -50 DEG C, xylanase is added in slurry, mashing, obtains mixed slurry；
Manufacture paper with pulp：After the acid fiber by polylactic solution obtained in acid fiber by polylactic modification is diluted, add in mixed slurry,
It is well mixed, chitosan, fento cellulose and Ludox are then added, dehydration forming, obtains wet web；
Obtain grease proofing food wrapper：The carboxymethyl chitosan solution and quality that mass percent is 2%-10% are prepared respectively
After percentage is adjusts pH to 5.0-8.0 after 0.4%-2% cationic guar solution and mixing, at 40-80 DEG C, to manufacturing paper with pulp
The wet web obtained in step carries out top sizing, at 90 DEG C -120 DEG C, dries 5min-15min, obtains grease proofing packaging for foodstuff
Paper.
In a preferred embodiment of the invention, the acid fiber by polylactic modifying processing step is specially：
It is 100 to take mass ratio：1-2:1 acid fiber by polylactic, sodium alginate and microcrystalline cellulose, by acid fiber by polylactic, sea
Mosanom and microcrystalline cellulose are configured to the aqueous solution that mass percent is 10%-20%, 10%-20% and 0.5%-2.0% respectively, will
After acid fiber by polylactic solution is heated to 40 DEG C -80 DEG C, sodium alginate aqueous solution and microcrystalline cellulose are added after adjusting pH to 5.0-8.0
The plain aqueous solution, stir after supersound process, obtain acid fiber by polylactic solution.
In a preferred embodiment of the invention, in the acid fiber by polylactic modifying processing step, the supersound process
In, supersonic frequency 30-100kHz, ultrasonic time 5-10min.
In a preferred embodiment of the invention, in the acid fiber by polylactic modifying processing step, the mixing speed
For 10000-20000rpm, mixing time 10-30min.
In a preferred embodiment of the invention, in the acid fiber by polylactic modifying processing step, described alginic acid
Sodium monodispersity index par（Mn）/ average weight（Mw）Coefficient is 1.3-1.8.
In a preferred embodiment of the invention, in the acid fiber by polylactic modifying processing step, described crystallite is fine
It is 150-200 to tie up the plain degree of polymerization.
In a preferred embodiment of the invention, in the slurry processing step, the slurry include softwood pulp and/
Or bamboo pulp.
In a preferred embodiment of the invention, in the slurry processing step, the slurry include softwood pulp and
Bamboo pulp, the leaf wood pulp：The mass ratio of bamboo pulp is 3:1.
In a preferred embodiment of the invention, in the step of manufacturing paper with pulp, the chitosan of the addition：Fibrillation fiber
Element：The mass ratio of Ludox is 20：10:1, meanwhile, the chitosan, fento cellulose, Ludox are configured to quality respectively
Percentage is 2%-8%, 1%-4% and 0.1%-0.4% solution.
In a preferred embodiment of the invention, it is described to obtain in grease proofing food wrapper step, the carboxymethyl shell
Glycan：The mass ratio of cation guar gum is 5:1；Wherein, the carboxymethyl chitosan substitution value DS is 0.6-0.8, molecular weight
For 35000-50000；The cation guar gum substitution value DS is 0.03-0.09, viscosity 4000-8000mPa.s.
Pass through above-mentioned technical proposal, the beneficial effects of the invention are as follows：
In the present invention, after handling acid fiber by polylactic, with total chlorine free bleaching commodity softwood pulp and bamboo pulp with copying, drop
It is low to be molded into sheet hole footpath, and using three kinds of fiber interpenetrating networks, increase the compactness of paper, improve tightness, improve page
Energy；Using chitosan, fento cellulose, Ludox/ternary system, improve into the uniform performance of paper, improve paper strength, and profit
With the property of chitosan and fento cellulose, the grease proofness of paper is improved；And using carboxymethyl chitosan and sun from
Sub- guar surface sizing, can greatly improve the surface strength of paper, and reach grease proofing effect.
By grease proofing food packaging paper made from the method for the present invention, its tearability is more than 350mN, tensile strength longitudinal direction
More than 3.6KN/m, grease proofing 8 grades of grade, smoothness（Front）More than 90s, surface strength is more than 14A, meets into a physical index
Technical requirements, and there is certain antibiotic property.Fiber and auxiliary agent used are safe and nontoxic, biodegradable, belong to green life
Production.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, further
Illustrate the present invention.
A kind of preparation method of grease proofing food wrapper of the present invention, comprises the following steps：
Acid fiber by polylactic modification：Acid fiber by polylactic is configured to the mass percent 10%-20% aqueous solution, heated,
Adjust pH；Then sodium alginate and microcrystalline cellulose are added, is stirred after ultrasound, obtains acid fiber by polylactic solution；
Specifically, it is 100 to take mass ratio：1-2:1 acid fiber by polylactic, sodium alginate and microcrystalline cellulose, by PLA
Fiber, sodium alginate and microcrystalline cellulose are configured to the water that mass percent is 10%-20%, 10%-20% and 0.5%-2.0% respectively
Solution, after acid fiber by polylactic solution is heated into 40 DEG C -80 DEG C, adjust pH to 5.0-8.0 after add sodium alginate aqueous solution and
The microcrystalline cellulose aqueous solution, stir after supersound process, obtain acid fiber by polylactic solution.
In supersound process, supersonic frequency 30-100kHz, ultrasonic time 5-10min.
During stirring, mixing speed 10000-20000rpm, mixing time 10-30min.
The sodium alginate used, its monodispersity index par（Mn）/ average weight（Mw）Coefficient is 1.3-1.8.
The degree of polymerization of the microcrystalline cellulose used is 150-200.
Slurry processing：Under the conditions of 30 DEG C -50 DEG C, xylanase is added in slurry, mashing, obtains mixed slurry；
Wherein, the slurry includes softwood pulp and/or bamboo pulp.
When slurry is softwood pulp and bamboo pulp, the leaf wood pulp：The mass ratio of bamboo pulp is 3:1.
Manufacture paper with pulp：After the acid fiber by polylactic solution obtained in acid fiber by polylactic modification is diluted, add in mixed slurry,
It is well mixed, chitosan, fento cellulose and Ludox are then added, dehydration forming, obtains wet web；
Wherein, the chitosan of addition：Fento cellulose：The mass ratio of Ludox is 20：10:1, meanwhile, for convenience
Use, it is 2%-8%, 1%-4% and 0.1%- that the chitosan, fento cellulose, Ludox are configured to mass percent respectively
0.4% solution.
In use, the deacetylation for the chitosan selected is 60%-80%, viscosity is more than 2000mPa.s.The fento of selection
Cellulose diameter is in 60-80nm.
Obtain grease proofing food wrapper：The carboxymethyl chitosan solution and quality that mass percent is 2%-10% are prepared respectively
After percentage is adjusts pH to 5.0-8.0 after 0.4%-2% cationic guar solution and mixing, at 40-80 DEG C, to manufacturing paper with pulp
The wet web obtained in step carries out top sizing, at 90 DEG C -120 DEG C, dries 5min-15min, obtains grease proofing packaging for foodstuff
Paper.Wherein, carboxymethyl chitosan：The mass ratio of cation guar gum is 5:1；Wherein, the carboxymethyl chitosan substitution value of selection
DS is 0.6-0.8, molecular weight 35000-50000；The cation guar gum substitution value DS of selection is 0.03-0.09, and viscosity is
4000-8000mPa.s。
Embodiment 1
A kind of preparation method of grease proofing food wrapper, comprises the following steps：
Acid fiber by polylactic modification：Add water to be configured to 12% solution acid fiber by polylactic first, be heated to 45 DEG C, adjust
PH processed to 5.5, it is that 16% sodium alginate and 0.8% microcrystalline cellulose stir 40min to add mass percent, is defeated in power output
Go out in the ultrasonic wave that frequency is 40kHz and handle 8min, and 25min is stirred with 12000rpm speed in mixer, be prepared into
Acid fiber by polylactic solution；
Wherein, the mass ratio 100 of acid fiber by polylactic, sodium alginate and microcrystalline cellulose：1:1.
In the present embodiment, the sodium alginate, its monodispersity index par（Mn）/ average weight（Mw）Coefficient is
1.3。
The degree of polymerization of microcrystalline cellulose used in the present embodiment is 150.
Slurry processing：By total chlorine free bleaching softwood pulp and total chlorine free bleaching bamboo pulp, at 35 DEG C, 0.03% is separately added into
Xylanase processing 40min after, then respectively in PFI mills with 18000n rotating speed defibrination 25min, control softwood pulp is beaten
The degree of beating is 450SR, bamboo pulp beating degree are 550SR；
Slurry after above-mentioned processing is configured to softwood pulp that mass percent is 60% respectively and mass percent is
Mixed slurry is obtained after 20% bamboo pulp and mixing；
Leaf wood pulp is stated in above-mentioned steps：The mass ratio 3 of bamboo pulp:1
Manufacture paper with pulp：The acid fiber by polylactic solution obtained in acid fiber by polylactic modification is diluted to mass percent as 20%
After acid fiber by polylactic solution, add in above-mentioned mixed slurry after being well mixed, it is 2% chitosan to add mass percent, quality
Percentage is 1% fento cellulose and mass percent is 0.1% Ludox, and wet web is shaped in sheet forming apparatus, is used
Hydraulic press is that 2Mpa squeezes 5min in pressure；
In the present embodiment, the deacetylation of the chitosan of selection is 60%, viscosity 3000mPa.s.The fento chemical fibre of selection
Tie up plain diameter 60nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature modulates carboxymethyl shell at 50 DEG C
Glycan and cationic guar solution pH to 5.5, it is painted into 4% carboxymethyl chitosan using scraper and 0.8% cation guar gum enters
Row top sizing, then the wet web after processing is put into sheet dryer, at 95 DEG C, 15min is dried, obtains anti-oil food
Package paper.
Carboxymethyl chitosan substitution value DS is 0.6 in the present embodiment, molecular weight 35000；The cation guar gum of selection
Substitution value DS is 0.03, viscosity 4000mPa.s.
Embodiment 2
A kind of grease proofing food wrapper preparation method, comprises the following steps：
Acid fiber by polylactic modification：：Add water to be configured to 16% solution acid fiber by polylactic first, be heated to 60 DEG C, adjust
PH processed to 6.0, it is that 16% sodium alginate and 1% microcrystalline cellulose stir 60min to add mass percent, is output in power output
Frequency is that 6min is handled in 60kHz ultrasonic wave, and stirs 20min in mixer with 15000rpm speed, is prepared into poly-
Acid fiber solution；
In above-mentioned steps, the mass ratio 100 of acid fiber by polylactic, sodium alginate and microcrystalline cellulose:1.5:1.
In the present embodiment, selected sodium alginate, its monodispersity index par（Mn）/ average weight（Mw）Coefficient
For 1.6.
The degree of polymerization of microcrystalline cellulose used in the present embodiment is 180.
Slurry processing：It is 3 by mass ratio:1 total chlorine free bleaching softwood pulp and total chlorine free bleaching bamboo pulp, at 45 DEG C,
Be separately added into 0.04% xylanase handle 70min respectively after, then respectively PFI mill in 25000n rotating speed defibrination
30min, it is 55 to control softwood pulp beating degree0SR, bamboo pulp beating degree are 600SR；
Slurry after above-mentioned processing is configured to mass percent is 69% softwood pulp and mass percent is 23% respectively
Bamboo pulp mixes to obtain mixed slurry；
Manufacture paper with pulp：The acid fiber by polylactic solution obtained in acid fiber by polylactic modification is diluted into mass percent for 8% to gather
After acid fiber, after being well mixed in adding in above-mentioned mixed slurry,
It is 4% chitosan to add mass percent, and mass percent is 2% fento cellulose and mass percent is
0.2% Ludox, is shaped to wet web in sheet forming apparatus, with hydraulic press pressure be 4Mpa squeezing 4min；
In this implementation, the deacetylation of the chitosan of selection is 70%, viscosity 2500mPa.s.The fibrillation fiber of selection
Plain diameter is in 70nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature modulates carboxymethyl shell at 60 DEG C
Glycan and cationic guar solution pH to 6.0, it is painted into 6% carboxymethyl chitosan using scraper and 1.2% cation guar gum enters
Row top sizing, then the wet web after processing is put into sheet dryer, at 105 DEG C, 8min is dried, obtains anti-oil food
Package paper.
In the present embodiment, the carboxymethyl chitosan substitution value DS of selection is 0.7, molecular weight 42000；The cation of selection
Guar gum substitution value DS is 0.06, viscosity 6000mPa.s.
Embodiment 3
A kind of grease proofing food wrapper preparation method, comprises the following steps：
Acid fiber by polylactic modification：Add water to be configured to 20% solution acid fiber by polylactic first, be heated to 75 DEG C, adjust
PH processed to 7.5, it is that 20% sodium alginate and 2.0% microcrystalline cellulose stir 80min to add mass percent, is defeated in power output
Go out in the ultrasonic wave that frequency is 80kHz and handle 10min, and 12min is stirred with 20000rpm speed in mixer, be prepared into
Acid fiber by polylactic solution；
In above-mentioned steps, the mass ratio 100 of the acid fiber by polylactic, sodium alginate and microcrystalline cellulose:2:1.
In the present embodiment, selected sodium alginate, its monodispersity index par（Mn）/ average weight（Mw）Coefficient
For 1.8.
The degree of polymerization of used microcrystalline cellulose is 200.
Slurry processing：By total chlorine free bleaching softwood pulp and total chlorine free bleaching bamboo pulp, at 50 DEG C, 0.05% is separately added into
Xylanase processing 70min after, then respectively in PFI mills with 28000n rotating speed defibrination 35min, control softwood pulp is beaten
The degree of beating is 650SR, bamboo pulp beating degree are 450SR；
Slurry after above-mentioned processing is configured to mass percent is 63% softwood pulp and mass percent is 21% respectively
Mixed slurry is obtained after bamboo pulp and mixing；
Leaf wood pulp is stated in above-mentioned steps：The mass ratio 3 of bamboo pulp:1.
Manufacture paper with pulp：The acid fiber by polylactic solution obtained in acid fiber by polylactic modification is diluted to mass percent as 16%
Added after acid fiber by polylactic in above-mentioned mixing materials and parts after being well mixed, it is 8% chitosan to add mass percent, quality percentage
Number is 0.4% Ludox for 4% fento cellulose and mass percent, and wet web is shaped in sheet forming apparatus, uses oil pressure
Machine is that 5Mpa squeezes 2min in pressure；
In the present embodiment, the deacetylation of the chitosan of selection is 80%, viscosity 3200mPa.s.The fento chemical fibre of selection
Plain diameter is tieed up in 80nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature modulates carboxymethyl shell at 70 DEG C
Glycan and cationic guar solution pH to 7.0, it is painted into 8% carboxymethyl chitosan using scraper and 1.6% cation guar gum enters
Row top sizing, then the wet web after processing is put into sheet dryer, at 110 DEG C, 10min is dried, obtains grease proofing food
Product package paper.
In the present embodiment, the carboxymethyl chitosan substitution value DS of selection is 0.8, molecular weight 50000；The cation of selection
Guar gum substitution value DS is 0.09, viscosity 8000mPa.s.
Embodiment 4
A kind of preparation method of grease proofing food wrapper, comprises the following steps：
Acid fiber by polylactic modification：Add water to be configured to 10% solution acid fiber by polylactic first, be heated to 40 DEG C, adjust
PH processed to 5.0, it is that 10% sodium alginate and 0.5% microcrystalline cellulose stir 40min to add mass percent, is defeated in power output
Go out in the ultrasonic wave that frequency is 30kHz and handle 5min, and 10min is stirred with 10000rpm speed in mixer, be prepared into
Acid fiber by polylactic solution；
Wherein, the mass ratio 100 of acid fiber by polylactic, sodium alginate and microcrystalline cellulose：1:1.
In the present embodiment, the sodium alginate, its monodispersity index par（Mn）/ average weight（Mw）Coefficient is
1.3。
The degree of polymerization of microcrystalline cellulose used in the present embodiment is 150.
Slurry processing：By total chlorine free bleaching softwood pulp after 30 DEG C add 0.03% xylanase processing 40min, so
Afterwards with 18000n rotating speed defibrination 25min in PFI mills, it is 45 to control softwood pulp beating degree0SR, by the pin after above-mentioned processing
Leaf slurry is configured to the softwood pulp slurry that mass percent is 60%；
Manufacture paper with pulp：The acid fiber by polylactic solution obtained in acid fiber by polylactic modification is diluted to mass percent as 20%
After acid fiber by polylactic solution, add in softwood pulp slurry after being well mixed, it is 3% chitosan to add mass percent, quality
Percentage is 1% fento cellulose and mass percent is 0.1% Ludox, and wet web is shaped in sheet forming apparatus, is used
Hydraulic press is that 2Mpa squeezes 5min in pressure；
In the present embodiment, the deacetylation of the chitosan of selection is 60%, viscosity 3000mPa.s.The fento chemical fibre of selection
Tie up plain diameter 60nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature modulates carboxymethyl shell at 40 DEG C
Glycan and cationic guar solution pH to 5.0, it is painted into 2% carboxymethyl chitosan using scraper and 0.4% cation guar gum enters
Row top sizing, then the wet web after processing is put into sheet dryer, at 90 DEG C, 5min is dried, obtains anti-oil food
Package paper.
Carboxymethyl chitosan substitution value DS is 0.6 in the present embodiment, molecular weight 35000；The cation guar gum of selection
Substitution value DS is 0.03, viscosity 4000mPa.s.
Embodiment 5
A kind of grease proofing food wrapper preparation method, comprises the following steps：
Acid fiber by polylactic modification：：Add water to be configured to 15% solution acid fiber by polylactic first, be heated to 55 DEG C, adjust
PH processed to 6.5, it is that 14% sodium alginate and 1.2% microcrystalline cellulose stir 60min to add mass percent, is defeated in power output
Go out in the ultrasonic wave that frequency is 50kHz and handle 7min, and 16min is stirred with 16000rpm speed in mixer, be prepared into
Acid fiber by polylactic solution；
In above-mentioned steps, the mass ratio 100 of acid fiber by polylactic, sodium alginate and microcrystalline cellulose:1.3:1.
In the present embodiment, selected sodium alginate, its monodispersity index par（Mn）/ average weight（Mw）Coefficient
For 1.6.
The degree of polymerization of microcrystalline cellulose used in the present embodiment is 180.
Slurry processing：Xylanase of the total chlorine free bleaching bamboo pulp in 45 DEG C of additions 0.04% is handled into 70min respectively, respectively
With 25000n rotating speed defibrination 30min in PFI mills, it is 60 to control bamboo pulp beating degree0SR；
It is 23% bamboo pulp that above-mentioned bamboo pulp is configured into mass percent；
Manufacture paper with pulp：The acid fiber by polylactic solution obtained in acid fiber by polylactic modification is diluted into mass percent for 8% to gather
After acid fiber, add in above-mentioned bamboo pulp after being well mixed,
It is 5% chitosan to add mass percent, and mass percent is 2% fento cellulose and mass percent is
0.3% Ludox, is shaped to wet web in sheet forming apparatus, with hydraulic press pressure be 4Mpa squeezing 4min；
In this implementation, the deacetylation of the chitosan of selection is 70%, viscosity 2500mPa.s.The fibrillation fiber of selection
Plain diameter is in 70nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature modulates carboxymethyl shell at 65 DEG C
Glycan and cationic guar solution pH to 6.5, it is painted into 5% carboxymethyl chitosan using scraper and 0.6% cation guar gum enters
Row top sizing, then the wet web after processing is put into sheet dryer, at 108 DEG C, 12min is dried, obtains grease proofing food
Product package paper.
In the present embodiment, the carboxymethyl chitosan substitution value DS of selection is 0.7, molecular weight 42000；The cation of selection
Guar gum substitution value DS is 0.06, viscosity 6000mPa.s.
Embodiment 6
A kind of grease proofing food wrapper preparation method, comprises the following steps：
Acid fiber by polylactic modification：Add water to be configured to 18% solution acid fiber by polylactic first, be heated to 80 DEG C, adjust
PH processed to 8.0, it is that 18% sodium alginate and 1.8% microcrystalline cellulose stir 80min to add mass percent, is defeated in power output
Go out in the ultrasonic wave that frequency is 100kHz and handle 9min, and 30min is stirred with 18000rpm speed in mixer, be prepared into
Acid fiber by polylactic solution；
In above-mentioned steps, the mass ratio 100 of the acid fiber by polylactic, sodium alginate and microcrystalline cellulose:2:1.
In the present embodiment, selected sodium alginate, its monodispersity index par（Mn）/ average weight（Mw）Coefficient
For 1.8.
The degree of polymerization of used microcrystalline cellulose is 200.
Slurry processing：By total chlorine free bleaching softwood pulp and total chlorine free bleaching bamboo pulp, at 50 DEG C, add 0.05% it is poly-
Xylosidase handles 70min respectively, respectively with 28000n rotating speed defibrination 35min in PFI mills, controls the softwood pulp beating degree to be
650SR, bamboo pulp beating degree are 450SR；
Slurry after above-mentioned processing is configured to mass percent is 63% softwood pulp and mass percent is 21% respectively
Mixed slurry is obtained after bamboo pulp and mixing；
Leaf wood pulp is stated in above-mentioned steps：The mass ratio 3 of bamboo pulp:1.
Manufacture paper with pulp：The acid fiber by polylactic solution obtained in acid fiber by polylactic modification is diluted to mass percent as 16%
Added after acid fiber by polylactic in above-mentioned mixing materials and parts after being well mixed, it is 8% chitosan to add mass percent, quality percentage
Number is 0.4% Ludox for 4% fento cellulose and mass percent, and wet web is shaped in sheet forming apparatus, uses oil pressure
Machine is that 5Mpa squeezes 2min in pressure；
In the present embodiment, the deacetylation of the chitosan of selection is 80%, viscosity 3200mPa.s.The fento chemical fibre of selection
Plain diameter is tieed up in 80nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature modulates carboxymethyl shell at 80 DEG C
Glycan and cationic guar solution pH to 8.0, it is painted into 10% carboxymethyl chitosan using scraper and 2.0% cation guar gum enters
Row top sizing, then the wet web after processing is put into sheet dryer, at 120 DEG C, 15min is dried, obtains grease proofing food
Product package paper.
In the present embodiment, the carboxymethyl chitosan substitution value DS of selection is 0.8, molecular weight 50000；The cation of selection
Guar gum substitution value DS is 0.09, viscosity 8000mPa.s.
The food wrapper that above-described embodiment 1-6 is obtained carries out using detection, it is found that its grease proofness is higher than prior art
Food wrapper caused by method, and the surface strength of paper is preferable, it is easy to use.Its tearability is more than 350mN, tensile strength
Longitudinal direction is more than 3.6KN/m, grease proofing 8 grades of grade, smoothness（Front）More than 90s, surface strength is more than 14A, into a physical index
Meet technical requirements, and there is certain antibiotic property.
Claims (10)
1. a kind of preparation method of grease proofing food wrapper, it is characterised in that comprise the following steps：
Acid fiber by polylactic modification：Acid fiber by polylactic is configured to the mass percent 10%-20% aqueous solution, heated, regulation
pH；Then sodium alginate and microcrystalline cellulose are added, is stirred after ultrasound, obtains the acid fiber by polylactic solution after modification；
Slurry processing：Under the conditions of 30 DEG C -50 DEG C, xylanase is added in slurry, mashing, obtains mixed slurry；
Manufacture paper with pulp：After the acid fiber by polylactic solution dilution after modification, add in mixed slurry, be well mixed, then add
Chitosan, fento cellulose and Ludox, dehydration forming, obtain wet web；
Obtain grease proofing food wrapper：The carboxymethyl chitosan solution and quality percentage that mass percent is 2%-10% are prepared respectively
After number is adjusts pH to 5.0-8.0 after 0.4%-2% cationic guar solution and mixing, at 40-80 DEG C, to step of manufacturing paper with pulp
In obtained wet web carry out top sizing, at 90 DEG C -120 DEG C, dry 5min-15min, obtain grease proofing food wrapper.
A kind of 2. preparation method of grease proofing food wrapper according to claim 1, it is characterised in that：The PLA is fine
Tieing up modifying processing step is specially：
It is 100 to take mass ratio：1-2:1 acid fiber by polylactic, sodium alginate and microcrystalline cellulose, by acid fiber by polylactic, alginic acid
Sodium and microcrystalline cellulose are configured to the aqueous solution that mass percent is 10%-20%, 10%-20% and 0.5%-2.0% respectively, by poly- breast
After sour fiber solution is heated to 40 DEG C -80 DEG C, sodium alginate aqueous solution and microcrystalline cellulose water are added after adjusting pH to 5.0-8.0
Solution, stir after supersound process, obtain the acid fiber by polylactic solution after modification.
A kind of 3. preparation method of grease proofing food wrapper according to claim 2, it is characterised in that：The PLA is fine
Tie up in modifying processing step, in the supersound process, supersonic frequency 30-100kHz, ultrasonic time 5-10min.
A kind of 4. preparation method of grease proofing food wrapper according to claim 2, it is characterised in that：The PLA is fine
Tie up in modifying processing step, the mixing speed is 10000-20000rpm, mixing time 10-30min.
5. according to a kind of preparation method of any described grease proofing food wrappers of claim 1-4, it is characterised in that：It is described poly-
In acid fiber modifying processing step, described sodium alginate monodispersity index is 1.3-1.8.
A kind of 6. preparation method of grease proofing food wrapper according to claim 5, it is characterised in that：The PLA is fine
Tie up in modifying processing step, the described microcrystalline cellulose degree of polymerization is 150-200.
A kind of 7. preparation method of grease proofing food wrapper according to claim 1, it is characterised in that：The slurry processing
In step, the slurry includes softwood pulp and/or bamboo pulp.
A kind of 8. preparation method of grease proofing food wrapper according to claim 7, it is characterised in that：The slurry processing
In step, the slurry includes softwood pulp and bamboo pulp, the softwood pulp：The mass ratio of bamboo pulp is 3:1.
A kind of 9. preparation method of grease proofing food wrapper according to claim 1, it is characterised in that：The step of manufacturing paper with pulp
In, the chitosan of the addition：Fento cellulose：The mass ratio of Ludox is 20：10:1, meanwhile, the chitosan, fento
Cellulose, Ludox are configured to the solution that mass percent is 2%-8%, 1%-4% and 0.1%-0.4% respectively.
A kind of 10. preparation method of grease proofing food wrapper according to claim any one of 6-9, it is characterised in that：Institute
State and obtain in grease proofing food wrapper step, the carboxymethyl chitosan：The mass ratio of cation guar gum is 5:1；Wherein, institute
It is 0.6-0.8, molecular weight 35000-50000 to state carboxymethyl chitosan substitution value DS；The cation guar gum substitution value DS
For 0.03-0.09, viscosity is 4000-8000mPa s.
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| CN107574723A (en) * | 2017-09-14 | 2018-01-12 | 安徽蓝韵包装有限公司 | A kind of grease proofing food wrapper and preparation method thereof |
| CN108071038A (en) * | 2017-12-15 | 2018-05-25 | 天津科技大学 | A kind of method for improving bamboo pulp fiber pliability |
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| CN110396868A (en) * | 2019-07-08 | 2019-11-01 | 陕西科技大学 | A kind of tealeaves fragrance wrapping paper and its preparation process |
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| CN116516725B (en) * | 2023-06-14 | 2024-01-05 | 华邦古楼新材料有限公司 | Non-laminated fluorine-free waterproof oil-proof food packaging functional paper |
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