CN106400603A - Production method of oil-proof food wrap paper - Google Patents
Production method of oil-proof food wrap paper Download PDFInfo
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- CN106400603A CN106400603A CN201610917994.2A CN201610917994A CN106400603A CN 106400603 A CN106400603 A CN 106400603A CN 201610917994 A CN201610917994 A CN 201610917994A CN 106400603 A CN106400603 A CN 106400603A
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- polylactic
- solution
- grease proofing
- acid fiber
- pulp
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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
Abstract
The invention discloses a production method of oil-proof food wrap paper. The production method includes the steps of subjecting polylactic acid fibers to modified treatment; preparing modified polylactic acid fibers into an aqueous solution, heating and regulating a pH value; adding sodium alginate and microcrystalline cellulose for ultrasonic treatment prior to stirring so as to obtain a polylactic acid fiber solution; adding xylanase into pulp and beating so as to obtain mixed pulp; conducting papermaking, namely diluting the polylactic acid fiber solution obtained from modified treatment of the polylactic acid fibers, adding the diluted polylactic acid fiber solution into the diluted mixed pulp with mixing evenly, adding chitosan, microfibrillated cellulose and silica sol and conducting dewatering pressing so as to obtain a wet paper web; preparing a carboxymethyl chitosan solution and a cationic guar gum solution, mixing the two solutions, and subjecting the wet paper web to surface sizing in the papermaking step so as to obtain the oil-proof food wrap paper. The oil-proof food wrap paper produced from a natural polymer assistant is simple in production method, safe and nonhazardous, and has excellent oil-proof performance and high surface strength.
Description
Technical field
The invention belongs to technical field of preparation of specialty paper is 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 local flavor.Grease proofing food wrapper, in addition to the performance meeting wrapping paper, also requires grease-proof to absorb infiltration, and defends
Raw, aseptic, pollution-free impurity etc., is the speciality paper with high added value.
Therefore exploitation oil resistant, meet the paper for packaged food of food packaging safety requirement, packaging for foodstuff peace can be met
Full hygienic requirements, the safe class of lifting packaging for foodstuff, there is higher economic benefit and social benefit.
The oil-proofing agent of the best fluorine element lipid of the oil-proofing agent effect on paper product, has excellent oil preventing performance at present, but by
It is high molecular polymer in it, exists and be difficult to biodegradation, be not belonging to the development category of Green Chemistry, recycling economy.Thus open
Send one kind and all adopt natural polymerses, by manufacturing paper with pulp to the modified, compounding of natural polymer, produce grease proofness
Grease proofing food wrapper good, that intensity is high, smoothness is good is that extremely have realistic meaning.
Content of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of food bag with grease proofness
Dress paper method, after acid fiber by polylactic is processed, is joined with total chlorine free bleaching commodity softwood pulp and bamboo pulp and copies, reduce into paper
Aperture, and utilize three kinds of fiber interpenetrating networks molding, increase the compactness of paper, improve tightness, improve page characteristic；Using shell
Polysaccharide, fento cellulose, Ludox/ternary system, improve into the uniform performance of paper, improve paper strength, and utilize shitosan
With the property of fento cellulose, improve the grease proofness of paper；And adopt carboxymethyl chitosan and cation guar gum
Top sizing, can be greatly improved the surface strength of paper, and reaches grease proofing effect.
In order to achieve the above object, the technical solution used in 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 aqueous solution of mass percent 10%-20%, heating, adjust
pH；It is subsequently adding sodium alginate and Microcrystalline Cellulose, ultrasonic rear stirring, obtain acid fiber by polylactic solution；
Slurry is processed：Under the conditions of 30 DEG C -50 DEG C, xylanase is added in slurry, making beating, obtain mixed slurry；
Manufacture paper with pulp：After the acid fiber by polylactic solution obtaining in acid fiber by polylactic modification is diluted, add in mixed slurry, mixing
Uniformly, it is subsequently adding shitosan, fento cellulose and Ludox, dehydration forming, obtain wet web；
Obtain grease proofing food wrapper：Prepare the carboxymethyl chitosan solution that mass percent is 2%-10% and percent mass respectively
After counting the cationic guar solution for 0.4%-2% and adjusting pH to 5.0-8.0 after mixing, at 40-80 DEG C, to step of manufacturing paper with pulp
In the wet web that obtains carry out top sizing, at 90 DEG C -120 DEG C, 5min-15min is dried, obtains grease proofing food wrapper.
In a preferred embodiment of the invention, described acid fiber by polylactic modifying processing step is specially：
Mass ratio is taken to be 100：1-2:1 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, after adjusting pH to 5.0-8.0, add sodium alginate aqueous solution and Microcrystalline Cellulose water
Solution, stirs after supersound process, obtains acid fiber by polylactic solution.
In a preferred embodiment of the invention, in described acid fiber by polylactic modifying processing step, described supersound process
In, supersonic frequency is 30-100kHz, and ultrasonic time is 5-10min.
In a preferred embodiment of the invention, in described acid fiber by polylactic modifying processing step, described mixing speed
For 10000-20000rpm, mixing time is 10-30min.
In a preferred embodiment of the invention, in described 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 described acid fiber by polylactic modifying processing step, described crystallite is fine
The plain degree of polymerization of dimension is 150-200.
In a preferred embodiment of the invention, in described slurry process step, described slurry include softwood pulp and/
Or bamboo pulp.
In a preferred embodiment of the invention, in described slurry process step, described slurry include softwood pulp and
Bamboo pulp, described leaf wood pulp：The mass ratio of bamboo pulp is 3:1.
In a preferred embodiment of the invention, described manufacture paper with pulp in step, the shitosan of described addition：Fibrillation fiber
Element：The mass ratio of Ludox is 20：10:1, meanwhile, described shitosan, fento cellulose, Ludox are configured to quality respectively
Percent is the solution of 2%-8%, 1%-4% and 0.1%-0.4%.
In a preferred embodiment of the invention, in the grease proofing food wrapper step of described acquisition, described carboxymethyl shell
Polysaccharide：The mass ratio of cation guar gum is 5:1；Wherein, described carboxymethyl chitosan substitution value DS is 0.6-0.8, molecular weight
For 35000-50000；Described cation guar gum substitution value DS is 0.03-0.09, and viscosity is 4000-8000mPa.s.
By technique scheme, the invention has the beneficial effects as follows：
In the present invention, after acid fiber by polylactic is processed, join with total chlorine free bleaching commodity softwood pulp and bamboo pulp and copy, reduce
Become sheet hole footpath, and utilize three kinds of fiber interpenetrating networks molding, increase the compactness of paper, improve tightness, improve page characteristic；Adopt
With shitosan, fento cellulose, Ludox/ternary system, improve into the uniform performance of paper, improve paper strength, and utilize shell
Polysaccharide and the property of fento cellulose, improve the grease proofness of paper；And adopt carboxymethyl chitosan and cation melon
That glue top sizing, can be greatly improved the surface strength of paper, and reach grease proofing effect.
The grease proofing food packaging paper being obtained by the method for the present invention, its tearability is more than 350mN, and tensile strength is longitudinally
More than 3.6KN/m, 8 grades of grease proofing grade, smoothness（Front）More than 90s, surface strength is more than 14A, becomes a physical index to meet
Technical requirements, and there is certain antibiotic property.Fiber used and auxiliary agent are all safe and nontoxic, biodegradable, belong to green life
Produce.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention realizes 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 aqueous solution of mass percent 10%-20%, heating, adjust
pH；It is subsequently adding sodium alginate and Microcrystalline Cellulose, ultrasonic rear stirring, obtain acid fiber by polylactic solution；
Specifically, mass ratio is taken to be 100：1-2:1 acid fiber by polylactic, sodium alginate and Microcrystalline Cellulose, by acid fiber by polylactic,
Sodium alginate and Microcrystalline Cellulose are configured to the aqueous solution that mass percent is 10%-20%, 10%-20% and 0.5%-2.0% respectively,
Acid fiber by polylactic solution is heated to after 40 DEG C -80 DEG C, after adjusting pH to 5.0-8.0, adds sodium alginate aqueous solution and crystallite fine
The plain aqueous solution of dimension, stirs after supersound process, obtains acid fiber by polylactic solution.
In supersound process, supersonic frequency is 30-100kHz, and ultrasonic time is 5-10min.
During stirring, mixing speed is 10000-20000rpm, and mixing time is 10-30min.
The sodium alginate using, its monodispersity index par（Mn）/ average weight（Mw）Coefficient is 1.3-1.8.
The degree of polymerization of the Microcrystalline Cellulose using is 150-200.
Slurry is processed：Under the conditions of 30 DEG C -50 DEG C, xylanase is added in slurry, making beating, obtain mixed slurry；
Wherein, described slurry includes softwood pulp and/or bamboo pulp.
When slurry is for softwood pulp and bamboo pulp, described leaf wood pulp：The mass ratio of bamboo pulp is 3:1.
Manufacture paper with pulp：After the acid fiber by polylactic solution obtaining in acid fiber by polylactic modification is diluted, add in mixed slurry,
Mix homogeneously, is subsequently adding shitosan, fento cellulose and Ludox, dehydration forming, obtains wet web；
Wherein, the shitosan of addition：Fento cellulose：The mass ratio of Ludox is 20：10:1, use for convenience meanwhile,
It is 2%-8%, 1%-4% and 0.1%-0.4% that described shitosan, fento cellulose, Ludox are configured to mass percent respectively
Solution.
In use, the deacetylation of the shitosan of selection is 60%-80%, and viscosity is more than 2000mPa.s.From fento
Cellulose diameter is in 60-80nm.
Obtain grease proofing food wrapper：Prepare the carboxymethyl chitosan solution that mass percent is 2%-10% and quality respectively
Percent is the cationic guar solution of 0.4%-2% after adjusting pH to 5.0-8.0 after mixing, at 40-80 DEG C, to manufacturing paper with pulp
The wet web obtaining in step carries out top sizing, at 90 DEG C -120 DEG C, 5min-15min is dried, and 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, and molecular weight is 35000-50000；From cation guar gum substitution value DS be 0.03-0.09, 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 solution first that be configured to 12% by acid fiber by polylactic, is heated to 45 DEG C, modulates pH
To 5.5, add mass percent to be 16% sodium alginate and 0.8% Microcrystalline Cellulose stirring 40min, be output frequency in output
Rate processes 8min in the ultrasound wave for 40kHz, and stirs 25min with the speed of 12000rpm in blender, is prepared into poly- breast
Sour fiber solution；
Wherein, the mass ratio 100 of acid fiber by polylactic, sodium alginate and Microcrystalline Cellulose：1:1.
In the present embodiment, described sodium alginate, its monodispersity index par（Mn）/ average weight（Mw）Coefficient is
1.3.
The degree of polymerization of the Microcrystalline Cellulose used in the present embodiment is 150.
Slurry is processed：By total chlorine free bleaching softwood pulp and total chlorine free bleaching bamboo pulp, when 35 DEG C, it is separately added into 0.03%
Xylanase process 40min after, then respectively in PFI mill with the rotating speed defibrination 25min of 18000n, control softwood pulp to beat
The degree of beating is 450SR, bamboo pulp beating degree is 550SR；
It is 20% that slurry after above-mentioned process is configured to softwood pulp that mass percent is 60% and mass percent respectively
Bamboo pulp and after mixing mixed slurry；
Leaf wood pulp is stated in above-mentioned steps：The mass ratio 3 of bamboo pulp:1
Manufacture paper with pulp：It is 20% poly- breast that the acid fiber by polylactic solution obtaining in acid fiber by polylactic modification is diluted to mass percent
After sour fiber solution, after adding mix homogeneously in above-mentioned mixed slurry, adding mass percent is 2% shitosan, percent mass
Number is 1% fento cellulose and mass percent is 0.1% Ludox, is shaped to wet web, uses oil pressure in sheet forming apparatus
Machine squeezes 5min in pressure for 2Mpa；
In the present embodiment, the deacetylation of the shitosan of selection is 60%, and viscosity is 3000mPa.s.From fento cellulose
Diameter 60nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature at 50 DEG C, modulate carboxymethyl shell
Polysaccharide and cationic guar solution pH to 5.5, are painted into 4% carboxymethyl chitosan using scraper and 0.8% cation guar gum enter
Row top sizing, then the wet web after processing is put in sheet dryer, at 95 DEG C, 15min is dried, obtains anti-oil food
Package paper.
In the present embodiment, carboxymethyl chitosan substitution value DS is 0.6, and molecular weight is 35000；From cation guar gum
Substitution value DS is 0.03, and viscosity is 4000mPa.s.
Embodiment 2
A kind of grease proofing food wrapper preparation method, comprises the following steps：
Acid fiber by polylactic modification：：Add water solution first that be configured to 16% by acid fiber by polylactic, is heated to 60 DEG C, modulates pH
To 6.0, add mass percent to be 16% sodium alginate and 1% Microcrystalline Cellulose stirring 60min, be output frequency in output
For processing 6min in the ultrasound wave of 60kHz, and in blender, 20min is stirred with the speed of 15000rpm, be prepared into polylactic 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 is
1.6.
The degree of polymerization of the Microcrystalline Cellulose used in the present embodiment is 180.
Slurry is processed：Mass ratio is 3:1 total chlorine free bleaching softwood pulp and total chlorine free bleaching bamboo pulp, when 45 DEG C,
Be separately added into 0.04% xylanase process 70min respectively after, then respectively PFI mill in the rotating speed defibrination of 25000n
30min, controls softwood pulp beating degree to be 550SR, bamboo pulp beating degree is 600SR；
By the slurry after above-mentioned process be configured to respectively mass percent be 69% softwood pulp and mass percent be 23% bamboo pulp
Mix to obtain mixed slurry；
Manufacture paper with pulp：It is 8% polylactic acid that the acid fiber by polylactic solution obtaining in acid fiber by polylactic modification is diluted to mass percent
After fiber, after adding middle mix homogeneously in above-mentioned mixed slurry,
Adding mass percent is 4% shitosan, and mass percent is 2% fento cellulose and mass percent is 0.2% silicon
Colloidal sol, is shaped to wet web in sheet forming apparatus, with hydraulic press pressure be 4Mpa squeezing 4min；
In this enforcement, the deacetylation of the shitosan of selection is 70%, and viscosity is 2500mPa.s.From fento cellulose straight
Footpath is in 70nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature at 60 DEG C, modulate carboxymethyl shell
Polysaccharide and cationic guar solution pH to 6.0, are painted into 6% carboxymethyl chitosan using scraper and 1.2% cation guar gum enter
Row top sizing, then the wet web after processing is put in 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, and molecular weight is 42000；From cation
Guar gum substitution value DS is 0.06, and viscosity is 6000mPa.s.
Embodiment 3
A kind of grease proofing food wrapper preparation method, comprises the following steps：
Acid fiber by polylactic modification：Add water solution first that be configured to 20% by acid fiber by polylactic, is heated to 75 DEG C, modulates pH
To 7.5, add mass percent to be 20% sodium alginate and 2.0% Microcrystalline Cellulose stirring 80min, be output frequency in output
Rate processes 10min in the ultrasound wave for 80kHz, and stirs 12min with the speed of 20000rpm in blender, is prepared into poly- breast
Sour fiber solution；
In above-mentioned steps, the mass ratio 100 of described 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 is
1.8.
The degree of polymerization of the Microcrystalline Cellulose being used is 200.
Slurry is processed：By total chlorine free bleaching softwood pulp and total chlorine free bleaching bamboo pulp, when 50 DEG C, it is separately added into 0.05%
Xylanase process 70min after, then respectively in PFI mill with the rotating speed defibrination 35min of 28000n, control softwood pulp to beat
The degree of beating is 650SR, bamboo pulp beating degree is 450SR；
By the slurry after above-mentioned process be configured to respectively mass percent be 63% softwood pulp and mass percent be 21% bamboo pulp
And after mixing, obtain mixed slurry；
Leaf wood pulp is stated in above-mentioned steps：The mass ratio 3 of bamboo pulp:1.
Manufacture paper with pulp：It is 16% poly- breast that the acid fiber by polylactic solution obtaining in acid fiber by polylactic modification is diluted to mass percent
After adding mix homogeneously in above-mentioned mixing materials and parts after sour fiber, adding mass percent is 8% shitosan, and mass percent is
4% fento cellulose and mass percent are 0.4% Ludox, be shaped to wet web, existed with hydraulic press in sheet forming apparatus
Pressure squeezes 2min for 5Mpa；
In the present embodiment, the deacetylation of the shitosan of selection is 80%, and viscosity is 3200mPa.s.From fento cellulose
Diameter is in 80nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature at 70 DEG C, modulate carboxymethyl shell
Polysaccharide and cationic guar solution pH to 7.0, are painted into 8% carboxymethyl chitosan using scraper and 1.6% cation guar gum enter
Row top sizing, then the wet web after processing is put in 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, and molecular weight is 50000；From cation
Guar gum substitution value DS is 0.09, and viscosity is 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 solution first that be configured to 10% by acid fiber by polylactic, is heated to 40 DEG C, modulates pH
To 5.0, add mass percent to be 10% sodium alginate and 0.5% Microcrystalline Cellulose stirring 40min, be output frequency in output
Rate processes 5min in the ultrasound wave for 30kHz, and stirs 10min with the speed of 10000rpm in blender, is prepared into poly- breast
Sour fiber solution；
Wherein, the mass ratio 100 of acid fiber by polylactic, sodium alginate and Microcrystalline Cellulose：1:1.
In the present embodiment, described sodium alginate, its monodispersity index par（Mn）/ average weight（Mw）Coefficient is
1.3.
The degree of polymerization of the Microcrystalline Cellulose used in the present embodiment is 150.
Slurry is processed：By total chlorine free bleaching softwood pulp after 30 DEG C of xylanases adding 0.03% process 40min, so
Afterwards with the rotating speed defibrination 25min of 18000n in PFI mill, softwood pulp beating degree is controlled to be 450SR, by the pin after above-mentioned process
Leaf slurry is configured to the softwood pulp slurry that mass percent is 60%；
Manufacture paper with pulp：It is 20% poly- breast that the acid fiber by polylactic solution obtaining in acid fiber by polylactic modification is diluted to mass percent
After sour fiber solution, after adding mix homogeneously in softwood pulp slurry, adding mass percent is 3% shitosan, percent mass
Number is 1% fento cellulose and mass percent is 0.1% Ludox, is shaped to wet web, uses oil pressure in sheet forming apparatus
Machine squeezes 5min in pressure for 2Mpa；
In the present embodiment, the deacetylation of the shitosan of selection is 60%, and viscosity is 3000mPa.s.From fento cellulose
Diameter 60nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature at 40 DEG C, modulate carboxymethyl shell
Polysaccharide and cationic guar solution pH to 5.0, are painted into 2% carboxymethyl chitosan using scraper and 0.4% cation guar gum enter
Row top sizing, then the wet web after processing is put in sheet dryer, at 90 DEG C, 5min is dried, obtains anti-oil food
Package paper.
In the present embodiment, carboxymethyl chitosan substitution value DS is 0.6, and molecular weight is 35000；From cation guar gum
Substitution value DS is 0.03, and viscosity is 4000mPa.s.
Embodiment 5
A kind of grease proofing food wrapper preparation method, comprises the following steps：
Acid fiber by polylactic modification：：Add water solution first that be configured to 15% by acid fiber by polylactic, is heated to 55 DEG C, modulates pH
To 6.5, add mass percent to be 14% sodium alginate and 1.2% Microcrystalline Cellulose stirring 60min, be output frequency in output
Rate processes 7min in the ultrasound wave for 50kHz, and stirs 16min with the speed of 16000rpm in blender, is prepared into poly- breast
Sour fiber 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 is
1.6.
The degree of polymerization of the Microcrystalline Cellulose used in the present embodiment is 180.
Slurry is processed：Total chlorine free bleaching bamboo pulp is processed 70min respectively in 45 DEG C of xylanases adding 0.04%, respectively
With the rotating speed defibrination 30min of 25000n in PFI mill, bamboo pulp beating degree is controlled to be 600SR；
It is 23% bamboo pulp that above-mentioned bamboo pulp is configured to mass percent；
Manufacture paper with pulp：It is 8% polylactic acid that the acid fiber by polylactic solution obtaining in acid fiber by polylactic modification is diluted to mass percent
After fiber, after adding mix homogeneously in above-mentioned bamboo pulp,
Adding mass percent is 5% shitosan, and mass percent is 2% fento cellulose and mass percent is 0.3% silicon
Colloidal sol, is shaped to wet web in sheet forming apparatus, with hydraulic press pressure be 4Mpa squeezing 4min；
In this enforcement, the deacetylation of the shitosan of selection is 70%, and viscosity is 2500mPa.s.From fento cellulose straight
Footpath is in 70nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature at 65 DEG C, modulate carboxymethyl shell
Polysaccharide and cationic guar solution pH to 6.5, are painted into 5% carboxymethyl chitosan using scraper and 0.6% cation guar gum enter
Row top sizing, then the wet web after processing is put in 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, and molecular weight is 42000；From cation
Guar gum substitution value DS is 0.06, and viscosity is 6000mPa.s.
Embodiment 6
A kind of grease proofing food wrapper preparation method, comprises the following steps：
Acid fiber by polylactic modification：Add water solution first that be configured to 18% by acid fiber by polylactic, is heated to 80 DEG C, modulates pH
To 8.0, add mass percent to be 18% sodium alginate and 1.8% Microcrystalline Cellulose stirring 80min, be output frequency in output
Rate processes 9min in the ultrasound wave for 100kHz, and stirs 30min with the speed of 18000rpm in blender, is prepared into poly- breast
Sour fiber solution；
In above-mentioned steps, the mass ratio 100 of described 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 is
1.8.
The degree of polymerization of the Microcrystalline Cellulose being used is 200.
Slurry is processed：By total chlorine free bleaching softwood pulp and total chlorine free bleaching bamboo pulp, when 50 DEG C, add 0.05% poly-
Xylosidase processes 70min respectively, and respectively with the rotating speed defibrination 35min of 28000n in PFI mill, control softwood pulp beating degree is
650SR, bamboo pulp beating degree is 450SR；
By the slurry after above-mentioned process be configured to respectively mass percent be 63% softwood pulp and mass percent be 21% bamboo pulp
And after mixing, obtain mixed slurry；
Leaf wood pulp is stated in above-mentioned steps：The mass ratio 3 of bamboo pulp:1.
Manufacture paper with pulp：It is 16% poly- breast that the acid fiber by polylactic solution obtaining in acid fiber by polylactic modification is diluted to mass percent
After adding mix homogeneously in above-mentioned mixing materials and parts after sour fiber, adding mass percent is 8% shitosan, and mass percent is
4% fento cellulose and mass percent are 0.4% Ludox, be shaped to wet web, existed with hydraulic press in sheet forming apparatus
Pressure squeezes 2min for 5Mpa；
In the present embodiment, the deacetylation of the shitosan of selection is 80%, and viscosity is 3200mPa.s.From fento cellulose
Diameter is in 80nm.
Obtain grease proofing food wrapper：After above-mentioned wet web is taken off, control applying glue temperature at 80 DEG C, modulate carboxymethyl shell
Polysaccharide and cationic guar solution pH to 8.0, are painted into 10% carboxymethyl chitosan using scraper and 2.0% cation guar gum enter
Row top sizing, then the wet web after processing is put in 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, and molecular weight is 50000；From cation
Guar gum substitution value DS is 0.09, and viscosity is 8000mPa.s.
The food wrapper that above-described embodiment 1-6 is obtained is carried out using detection, finds that its grease proofness is higher than prior art
The food wrapper that method produces, and the surface strength of paper is preferably, easy to use.Its tearability is more than 350mN, tensile strength
Longitudinally it is more than 3.6KN/m, 8 grades of grease proofing grade, smoothness（Front）More than 90s, surface strength is more than 14A, becomes 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 is it is characterised in that comprise the following steps：
Acid fiber by polylactic modification：Acid fiber by polylactic is configured to the aqueous solution of mass percent 10%-20%, heating, adjust
pH；It is subsequently adding sodium alginate and Microcrystalline Cellulose, ultrasonic rear stirring, obtain acid fiber by polylactic solution；
Slurry is processed：Under the conditions of 30 DEG C -50 DEG C, xylanase is added in slurry, making beating, obtain mixed slurry；
Manufacture paper with pulp：After the acid fiber by polylactic solution obtaining in acid fiber by polylactic modification is diluted, add in mixed slurry, mixing
Uniformly, it is subsequently adding shitosan, fento cellulose and Ludox, dehydration forming, obtain wet web；
Obtain grease proofing food wrapper：Prepare the carboxymethyl chitosan solution that mass percent is 2%-10% and percent mass respectively
After counting the cationic guar solution for 0.4%-2% and adjusting pH to 5.0-8.0 after mixing, at 40-80 DEG C, to step of manufacturing paper with pulp
In the wet web that obtains carry out top sizing, at 90 DEG C -120 DEG C, 5min-15min is dried, obtains grease proofing food wrapper.
2. a kind of grease proofing food wrapper according to claim 1 preparation method it is characterised in that：Described polylactic acid is fine
Dimension modifying processing step is specially：
Mass ratio is taken to be 100：1-2:1 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, after adjusting pH to 5.0-8.0, add sodium alginate aqueous solution and Microcrystalline Cellulose water
Solution, stirs after supersound process, obtains acid fiber by polylactic solution.
3. a kind of grease proofing food wrapper according to claim 2 preparation method it is characterised in that：Described polylactic acid is fine
In dimension modifying processing step, in described supersound process, supersonic frequency is 30-100kHz, and ultrasonic time is 5-10min.
4. a kind of grease proofing food wrapper according to claim 2 preparation method it is characterised in that：Described polylactic acid is fine
In dimension modifying processing step, described mixing speed is 10000-20000rpm, and mixing time is 10-30min.
5. the preparation method according to the arbitrary described a kind of grease proofing food wrapper of claim 1-4 it is characterised in that：Described poly-
In acid fiber modifying processing step, described sodium alginate monodispersity index par（Mn）/ average weight（Mw）Coefficient
For 1.3-1.8.
6. a kind of grease proofing food wrapper according to claim 5 preparation method it is characterised in that：Described polylactic acid is fine
In dimension modifying processing step, the described Microcrystalline Cellulose degree of polymerization is 150-200.
7. a kind of grease proofing food wrapper according to claim 1 preparation method it is characterised in that：Described slurry is processed
In step, described slurry includes softwood pulp and/or bamboo pulp.
8. a kind of grease proofing food wrapper according to claim 7 preparation method it is characterised in that：Described slurry is processed
In step, described slurry includes softwood pulp and bamboo pulp, described leaf wood pulp：The mass ratio of bamboo pulp is 3:1.
9. a kind of grease proofing food wrapper according to claim 1 preparation method it is characterised in that：Described step of manufacturing paper with pulp
In, the shitosan of described addition：Fento cellulose：The mass ratio of Ludox is 20：10:1, meanwhile, described shitosan, fento
Cellulose, Ludox are configured to the solution that mass percent is 2%-8%, 1%-4% and 0.1%-0.4% respectively.
10. a kind of grease proofing food wrapper according to any one of claim 1-9 preparation method it is characterised in that：Institute
State in the grease proofing food wrapper step of acquisition, described carboxymethyl chitosan：The mass ratio of cation guar gum is 5:1；Wherein, institute
Stating carboxymethyl chitosan substitution value DS is 0.6-0.8, and molecular weight is 35000-50000；Described cation guar gum substitution value DS
For 0.03-0.09, viscosity is 4000-8000mPa.s.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002172728A (en) * | 2000-12-07 | 2002-06-18 | Toppan Printing Co Ltd | Packaging material and packaging body containing natural resin, and their manufacturing methods |
| CN103603233A (en) * | 2013-12-05 | 2014-02-26 | 福建希源纸业有限公司 | Food packaging paper and preparation method thereof |
| CN103669105A (en) * | 2013-11-14 | 2014-03-26 | 华南理工大学 | Oil-proof paper and production method thereof |
| CN105051289A (en) * | 2013-03-26 | 2015-11-11 | 凯米罗总公司 | Process for production of paper or board |
| CN106012688A (en) * | 2016-07-26 | 2016-10-12 | 浙江恒达新材料股份有限公司 | Preparation process for medical antibacterial packing paper |
-
2016
- 2016-10-21 CN CN201610917994.2A patent/CN106400603B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002172728A (en) * | 2000-12-07 | 2002-06-18 | Toppan Printing Co Ltd | Packaging material and packaging body containing natural resin, and their manufacturing methods |
| CN105051289A (en) * | 2013-03-26 | 2015-11-11 | 凯米罗总公司 | Process for production of paper or board |
| CN103669105A (en) * | 2013-11-14 | 2014-03-26 | 华南理工大学 | Oil-proof paper and production method thereof |
| CN103603233A (en) * | 2013-12-05 | 2014-02-26 | 福建希源纸业有限公司 | Food packaging paper and preparation method thereof |
| CN106012688A (en) * | 2016-07-26 | 2016-10-12 | 浙江恒达新材料股份有限公司 | Preparation process for medical antibacterial packing paper |
Cited By (16)
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|---|---|---|---|---|
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| CN107687111A (en) * | 2017-08-07 | 2018-02-13 | 华南理工大学 | A kind of high intensity green and environmental protection paper and preparation method and application |
| 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 |
| CN109056422A (en) * | 2018-08-06 | 2018-12-21 | 枣庄市天龙纸业有限公司 | A kind of degradable environmental protection package paper and preparation method thereof |
| CN109629323A (en) * | 2018-12-25 | 2019-04-16 | 浙江恒达新材料股份有限公司 | A kind of high waterproof suction pipe facial tissue and preparation method thereof |
| CN109610218A (en) * | 2019-01-04 | 2019-04-12 | 浙江恒达新材料股份有限公司 | The preparation method and application of grease proofing plant microfibril or grease proofing nano-cellulose |
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| CN110373939B (en) * | 2019-07-08 | 2022-04-15 | 西安华企众信科技发展有限公司 | Tea antibacterial deodorizing paper and preparation process thereof |
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