CN110387771A - A kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material - Google Patents
A kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material Download PDFInfo
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- CN110387771A CN110387771A CN201910539909.7A CN201910539909A CN110387771A CN 110387771 A CN110387771 A CN 110387771A CN 201910539909 A CN201910539909 A CN 201910539909A CN 110387771 A CN110387771 A CN 110387771A
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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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- 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
- 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
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Wrappers (AREA)
Abstract
The present invention relates to a kind of preparation methods of anti-moisture absorption type high-barrier food packaging paper material, belong to field of packaging material.Technical solution of the present invention carries out preparing barrier coat using the supported porous molecular sieve of polyvinyl alcohol, since small molecule is in the absorption of coating surface and the ingredient of coating, structure and surface state are related, surface defect is conducive to small molecule absorption, molecular sieve is supported on coat inside as molecular screen material, molecular screen material also will affect dissolution and diffusion of the molecular screen material in macromolecular with nonbonding effect with being bonded for macromolecular substances, and high molecular material is crosslinked, the increase etc. of segment rigidity will limit the movement of chain, material is caused to be difficult to be swollen, segment freedom of motion reduces on phase interface, to make material permeability decline, increase its barrier property, further improve the barrier property of material, it is that food packaging materials surface has excellent hydrophobic performance.
Description
Technical field
The present invention relates to a kind of preparation methods of anti-moisture absorption type high-barrier food packaging paper material, belong to packaging material technology
Field.
Background technique
Food packaging is the important component part of food industry, and the quality of food can be kept in storage and transportational process
And safety, and by prevent unfavorable factor or condition (such as putrefactive microorganisms, chemical pollutant, oxygen, moisture, light, outside
Power etc.) extend food shelf-life.In order to fulfil such function, packaging material provides physical protection for product and creates properly
Physical and chemical condition, this is for obtaining satisfied shelf life and keeping food quality and safety most important.Food packaging
The acquisition or loss that should prevent moisture prevent microbial contamination, and in addition to the basic performance of packaging material is (such as machinery, light
Learn and hot property) except, should also have it is some prevent water vapour, oxygen, what carbon dioxide and other volatile compounds penetrated
Performance.Food packaging is not only used as container, and as the protection barrier with some innovative functions.Basic packaging material, example
Such as paper and cardboard, plastics, glass, the combination of the material of metal and various chemical property and physical structure, for meeting difference
The packaging function of type of food product demand and requirement.In four kinds of basic packaging materials, since the twentieth century middle period, petroleum base modeling
Material material is widely used.It is cheap and easy to use to be primarily due to them, there is good physical chemical property and processability
Energy.On the other hand, although plastic package material is widely used in the packaging of various types food, these plastic package materials
Easily biological-degradable is not allowed after use, and generates a large amount of heat and exhaust gas in burning, to cause serious environmental pollution.
Influence of the lasting Plastics Packaging Wastes to environment is always the focus of global common concern, but processing method is limited, institute
With for the natural resources born, exhausted caused by environment as not biodegradable plastic package material and food safety oneself
Caused more and more to pay close attention to, leads to the biodegradable packaging material conduct to renewable source (biopolymer) is come from
The demand of the substitute of synthetic plastic packaging material is continuously increased.Ideal biodegradable packaging material comes from recyclable organism
Resource, commonly referred to as biopolymer have excellent machinery and barrier property, and can biology at the end of its service life
Degradation.Biopolymer oneself be considered as potential environment using not biodegradable and non-renewable plastic package material
Friendly substitute.Biopolymer packaging material can be also used for the barrier of gas and liquid, and the matter by improving food
It measures and extends its shelf-life to supplement other kinds of packaging.In addition, biopolymer packaging material be can be added it is various each
The excellent carrier of the additive (such as antioxidant, antifungal agent, antimicrobial and other nutrients etc.) of sample.Currently, can
Biodegradable packaging material still has some limitations, those packaging material mechanical performances based on biopolymer are relatively
Difference, high-hydrophilic and machinability are poor, limit its application in the industry.Protein and carbohydrate packaging film are usually
Down to the good barrier property of oxygen and there is good mechanical performance under moderate relative humidity；However, due to its natural parent
Aqueous nature causes it poor to the barrier property of vapor.Although many, which is ground the work that makes internal disorder or usurp and concentrated on, improves biopolymer base packaging film
Film character, and have significant improvement, but its physics, heat and mechanical performance are still unsatisfactory, and answer in industry
It is still relatively difficult in.Recently, barrier is promoted to have, mechanical and thermal property Biological nanocomposite is one kind of representative
New material has been considered as improving these promising selections based on biopolymer packaging material performance.It is compound to promote biology
Material is to vapor, oxygen, the barrier property of carbon dioxide and aroma compound, various fresh and processed food to extending
Shelf-life has significant impact.In addition, multiple by selecting appropriate polymer substrate and nano particle that can subtly adjust biology
The biological degradability of condensation material, this is also the driving force that food packaging uses Biocomposite material.
Barrier property paper is widely used in packaging field, usually by proofing processing, denaturation process, paper-plastic stick technology and
The methods of barrier property coating makes paper obtain barrier property.However proofing processing, denaturation processing and complex technique, paper product can be made
Recycling repulping become difficult, barrier property coating be then paper surface formed one layer of barrier coat, be easily recycled, wherein water
The polymer-coated paper recovery process of property is simple, it is easy to accomplish.Coating for waterborne polymeric coating has synthesis quasi polymer, life
Object polymer and polymer/nanoclay composite material.The synthesis quasi polymer packaging material being widely used at present mainly has poly-
Caprolactone, Vingon, wherein polyvinyl alcohol has good film forming and solvent resistance, can there is different viscosity and hydrolysis
Degree, can provide good grease barrier property.But existing barrier package paper material is bad there is also hydrophobicity and material property
Poor problem, so effectively being improved to it necessary.
Summary of the invention
The technical problems to be solved by the invention:, the mechanics of materials bad for current barrier package paper material hydrophobic performance
Performance it is poor the problem of, provide a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) it takes bamboo chip and grinds, cross sieve, wash to obtain elution particle and according to parts by weight, respectively 45~50 parts of weighing
5% sodium chlorite solution of mass fraction, 3~5 parts of glacial acetic acid and 10~15 parts of elution particles are placed in three-necked flask, are stirred
And ultrasonic disperse, collect to obtain dispersion slurries；
(2) gangue is taken to be placed in resistance box, heating heating and thermal insulation calcining, standing is cooled to room temperature, crushing grinding, sieving,
Must be sieved particle and 1:10 in mass ratio, and sieving particle is added in hydrochloric acid, is stirred and filters, and collect filter cake and wash
It washs, vacuum freeze drying simultaneously collects blapharoplast；Blapharoplast and sodium hydroxide solution are stirred simultaneously by 1:5 in mass ratio
Centrifuge separation collects supernatant, then 1:70 in mass ratio, aluminium powder is stirred and is collected to mix with sodium hydroxide solution
Liquid；
(3) supernatant is stirred with mixed liquor and oil bath heating and is stood, filters and collect filtrate by 1:1 by volume, old
Change simultaneously Crystallizing treatment, filters and collect filter cake, it is dry that modified particles weigh 45~50 parts of dispersions according to parts by weight respectively
Slurries, 6~8 parts of 8% poly-vinyl alcohol solutions of mass fraction and 10~15 parts of trim,ethylchlorosilanes, 3~5 part of 200 mesh modified particles
It is placed in three-necked flask, is stirred simultaneously ultrasonic disperse, slurries and insulation reaction must be dispersed, obtain reaction sol solutions；
(4) broad-leaved slurry is taken to be placed in beater, mashing processing is collected pulper slurry and is placed in fluffer, discongest processing, collects
Slurries and copy paper processing are discongested, after the completion of copy paper, paper is taken to handle and dry, obtains dry base paper, negated and answer sol solutions and be coated with,
After the completion of to be coated, standing is dried and is dried, and is stood to room temperature, and the anti-moisture absorption type high-barrier food packet can be prepared into
Fill paper material.
The elution grain diameter is 250~300 μm.
The heating heating and thermal insulation calcining is is warming up to 950~1000 DEG C by 5 DEG C/min, 10~12h of heat preservation calcining.
The sieving grain diameter is 200 mesh.
The concentration of sodium hydroxide solution is 2mol/L.
The Crystallizing treatment is 6~8h of Crystallizing treatment in 250~300W microwave reactor.
The pulper slurry beating degree is 83.5~85 ° of SR.
Described discongests processing to discongest 10~15min at 15000~15250r/min.
To quantify 60g/m2 by copy paper, paper shaping area is 0.25~1.00m for the copy paper processing, is carried out at copy paper
Reason.
The coating thickness is 0.02mm.
The present invention is compared with other methods, and advantageous effects are:
(1) technical solution of the present invention uses gangue to carry out acidolysis and alkaline hydrolysis for raw material, and assists hydro-thermal reaction from particle surface
Start gradually to keep molecular sieve particle diameter distribution wider, zeolite crystallization speed can be improved by Microwave-assisted firing to carrying out inside particle
Degree shortens the zeolite crystallization time, assists synthesis of molecular sieve to provide effective way for utilizing coal refuse through microwave, is by molecular screen material
Modified molecular screen is simultaneously added in coating colloidal sol barrier layer, due to the molecular screen material of use, can effectively stop gas point
The infiltration of son, thus extend gas diffusion path, and the extension of the good dispersion of molecular sieve and orientation for gas diffusion path
It has a significant impact, by load of the molecular screen material inside fibrous material, and contiguity is deepened, and extension gas is more advantageous to
The diffusion path of molecule is diffused in molecular sieve as inorganic molecule due to gas to significantly improve gas barrier property
It is carried out between sieve and sol matrix, molecular sieve carried horizontal dispersity, at this point, the tortuosity of permeation pathway reaches maximum
Value, the structure can reduce permeability of the gas in laminated film to the full extent, on the other hand, the aggregation extent of molecular sieve
Also have an impact to the barrier property of complex sol layer, preferable with matrix compatibility when molecular sieve contains amphiprotic group, dispersion is equal
It is even, longer diffusion path is formed, gas barrier property is improved, and the diffusion path of formation is longer, corresponding gas
Body barrier property is preferable；
(2) technical solution of the present invention carries out preparing barrier coat using the supported porous molecular sieve of polyvinyl alcohol, since small molecule exists
The absorption of coating surface is related with the ingredient of coating, structure and surface state, and surface defect is conducive to small molecule absorption, molecule
Sieve is supported on coat inside as molecular screen material, and the free volume of diffusion and coating in coated substrate has much relations,
Then permeability is strong greatly for free volume, and coating free volume becomes larger when increasing temperature, therefore infiltration coefficient also will increase, in addition, point
Son sieve material also will affect dissolution and expansion of the molecular screen material in macromolecular with nonbonding effect with being bonded for macromolecular substances
It dissipates, and high molecular material crosslinking, increase of segment rigidity etc. will limit the movement of chain, cause material to be difficult to be swollen, phase interface
Upper segment freedom of motion reduces, so that material permeability be made to decline, increases its barrier property, further improves the barrier of material
Property, it is that food packaging materials surface has excellent hydrophobic performance.
Specific embodiment
It takes bamboo chip and grinds, cross 250~300 μm of sieves, and use 15% hydrochloric acid of mass fraction and 15% hydrogen-oxygen respectively
Change sodium solution respectively to elute 3~5 times, elution particle and according to parts by weight, respectively 45~50 parts of 5% chlorous acid of mass fraction of weighing
Sodium solution, 3~5 parts of glacial acetic acid and 10~15 parts of elution particles are placed in three-necked flask, are stirred and are placed at 75~80 DEG C
10~15min of ultrasonic disperse collects to obtain dispersion slurries；Gangue is taken to be placed in resistance box, 950 are warming up to by 5 DEG C/min~
1000 DEG C, after 10~12h of heat preservation calcining, standing is cooled to room temperature, crushing grinding, crosses 200 meshes, and must be sieved particle and by quality
Than 1:10, sieving particle is added in 5% hydrochloric acid of mass fraction, is stirred and filters, collected filter cake and use deionized water
Washing is in neutrality to cleaning solution, and vacuum freeze drying simultaneously collects blapharoplast；1:5 in mass ratio, by blapharoplast and 2mol/L
Sodium hydroxide solution is stirred and is centrifugated, and collects supernatant, then 1:70 in mass ratio, by 200 mesh aluminium powders and quality point
Several 5% sodium hydroxide solutions are stirred and collect to obtain mixed liquor, and 1:1, supernatant and mixed liquor are stirred by volume
Be placed at 95~100 DEG C oil bath heating and stand 3~5h, filter and collect filtrate, be aged 20 at room temperature~for 24 hours after, then
6~8h of Crystallizing treatment in 250~300W microwave reactor, filters and collects filter cake, and dry 6~8h, obtains at 55~60 DEG C
Modified particles；According to parts by weight, respectively weigh 45~50 parts of dispersion slurries, 6~8 parts of 8% poly-vinyl alcohol solutions of mass fraction,
It is placed in three-necked flask with 10~15 parts of trim,ethylchlorosilanes, 3~5 part of 200 mesh modified particles, be stirred and be placed in 200~
10~15min of ultrasonic disperse under 300W must disperse slurries and be placed in 2~3h of insulation reaction at 65~75 DEG C, obtain reaction sol solutions；
Broad-leaved slurry is taken to be placed in beater, mashing is placed in 83.5~85 ° of SR at room temperature, and it collects pulper slurry and is placed in fluffer,
10~15min is discongested at 15000~15250r/min, collection discongests slurries and quantifies 60g/m2, paper forming surface by copy paper
Product is 0.25~1.00m, carries out copy paper processing, and after the completion of copy paper, the l Water Paper page with net encloses load paper plate after removing, and uses couch roll
After reciprocal rolling, rod-pressing machine pressure bar is entered back into, air dry oven dries 25~30min at 100~110 DEG C, obtains dry base paper；It takes
It reacts sol solutions and presses coating thickness 0.02mm, to dry base paper coating, after the completion of to be coated, standing, which is dried, is placed in 45~50
Dry 2~3h, stands to room temperature at DEG C, can be prepared into the anti-moisture absorption type high-barrier food packaging paper material.
Example 1
It takes bamboo chip and grinds, cross 250 μm of sieves, and is each with 15% hydrochloric acid of mass fraction and 15% sodium hydroxide solution respectively
Elution 3 times, elution particle and according to parts by weight, respectively 45 parts of 5% sodium chlorite solutions of mass fraction of weighing, 3 parts of glacial acetic acid
It is placed in three-necked flask with 10 parts of elution particles, is stirred and is placed in ultrasonic disperse 10min at 75 DEG C, collect to obtain dispersion pulp
Liquid；It taking gangue to be placed in resistance box, is warming up to 950 DEG C by 5 DEG C/min, after 10h is calcined in heat preservation, standing is cooled to room temperature,
Crushing grinding crosses 200 meshes, and must be sieved particle and 1:10 in mass ratio, and sieving particle is added to 5% hydrochloric acid of mass fraction
In, it is stirred and filters, collect filter cake and being washed with deionized to cleaning solution and be in neutrality, vacuum freeze drying is simultaneously collected
Blapharoplast；Blapharoplast is stirred and is centrifugated with 2mol/L sodium hydroxide solution, in collection by 1:5 in mass ratio
200 mesh aluminium powders are stirred with 5% sodium hydroxide solution of mass fraction and collect to mix by clear liquid, then 1:70 in mass ratio
Liquid, 1:1, supernatant and mixed liquor are stirred and is placed in oil bath heating at 95 DEG C and stands 3h, filter and receive by volume
Collect filtrate, after being aged 20h at room temperature, then the Crystallizing treatment 6h in 250W microwave reactor, filter cake is filtered and collects, at 55 DEG C
Lower dry 6h, obtains modified particles；According to parts by weight, 45 parts of dispersion slurries, 6 parts of 8% polyvinyl alcohol of mass fraction are weighed respectively
Solution and 10 parts of trim,ethylchlorosilanes, 3 part of 200 mesh modified particles are placed in three-necked flask, be stirred be placed under 200W surpass
Sound disperses 10min, must disperse slurries and be placed in insulation reaction 2h at 65 DEG C, obtain reaction sol solutions；Broad-leaved slurry is taken to be placed in beater
In, mashing is placed in 83.5 ° of SR at room temperature, collects pulper slurry and is placed in fluffer, discongests at 15000r/min
10min, collection discongest slurries and quantify 60g/m by copy paper2, paper shaping area is 0.25m, copy paper processing is carried out, to copy paper
After the completion, the l Water Paper page with net encloses load paper plate after removing, and after back and forth being rolled with couch roll, rod-pressing machine pressure bar is entered back into, at 100 DEG C
Air dry oven dries 25min, obtains dry base paper；It negates and answers sol solutions and by coating thickness 0.02mm, to dry base paper coating,
After the completion of to be coated, standing, which is dried, is placed at 45 DEG C dry 2h, stands to room temperature, can be prepared into the anti-moisture absorption type
High-barrier food packaging paper material.
Example 2
It takes bamboo chip and grinds, cross 275 μm of sieves, and is each with 15% hydrochloric acid of mass fraction and 15% sodium hydroxide solution respectively
Elution 4 times, elution particle and according to parts by weight, respectively 47 parts of 5% sodium chlorite solutions of mass fraction of weighing, 4 parts of glacial acetic acid
It is placed in three-necked flask with 12 parts of elution particles, is stirred and is placed in ultrasonic disperse 12min at 77 DEG C, collect to obtain dispersion pulp
Liquid；It taking gangue to be placed in resistance box, is warming up to 975 DEG C by 5 DEG C/min, after 12h is calcined in heat preservation, standing is cooled to room temperature,
Crushing grinding crosses 200 meshes, and must be sieved particle and 1:10 in mass ratio, and sieving particle is added to 5% hydrochloric acid of mass fraction
In, it is stirred and filters, collect filter cake and being washed with deionized to cleaning solution and be in neutrality, vacuum freeze drying is simultaneously collected
Blapharoplast；Blapharoplast is stirred and is centrifugated with 2mol/L sodium hydroxide solution, in collection by 1:5 in mass ratio
200 mesh aluminium powders are stirred with 5% sodium hydroxide solution of mass fraction and collect to mix by clear liquid, then 1:70 in mass ratio
Liquid, 1:1, supernatant and mixed liquor are stirred and is placed in oil bath heating at 97 DEG C and stands 4h, filter and receive by volume
Collect filtrate, after being aged 22h at room temperature, then the Crystallizing treatment 7h in 275W microwave reactor, filter cake is filtered and collects, at 57 DEG C
Lower dry 7h, obtains modified particles；According to parts by weight, 47 parts of dispersion slurries, 7 parts of 8% polyvinyl alcohol of mass fraction are weighed respectively
Solution and 12 parts of trim,ethylchlorosilanes, 4 part of 200 mesh modified particles are placed in three-necked flask, be stirred be placed under 250W surpass
Sound disperses 12min, must disperse slurries and be placed in insulation reaction 2h at 67 DEG C, obtain reaction sol solutions；Broad-leaved slurry is taken to be placed in beater
In, mashing is placed in 84 ° of SR at room temperature, and it collects pulper slurry and is placed in fluffer, discongest 12min at 15127r/min,
Collection discongests slurries and quantifies 60g/m by copy paper2, paper shaping area is 0.55m, copy paper processing is carried out, after the completion of copy paper,
L Water Paper page with net encloses load paper plate after removing, and after back and forth being rolled with couch roll, enters back into rod-pressing machine pressure bar, and air blast is dry at 105 DEG C
The dry 27min of dry case, obtains dry base paper；It negates and answers sol solutions and by coating thickness 0.02mm, it is to be coated to dry base paper coating
After the completion, it stands to dry and is placed at 47 DEG C dry 2h, stand to room temperature, the anti-moisture absorption type high-barrier can be prepared into
Food packaging paper material.
Example 3
It takes bamboo chip and grinds, cross 300 μm of sieves, and is each with 15% hydrochloric acid of mass fraction and 15% sodium hydroxide solution respectively
Elution 5 times, elution particle and according to parts by weight, respectively 50 parts of 5% sodium chlorite solutions of mass fraction of weighing, 5 parts of glacial acetic acid
It is placed in three-necked flask with 15 parts of elution particles, is stirred and is placed in ultrasonic disperse 15min at 80 DEG C, collect to obtain dispersion pulp
Liquid；It taking gangue to be placed in resistance box, is warming up to 1000 DEG C by 5 DEG C/min, after 12h is calcined in heat preservation, standing is cooled to room temperature,
Crushing grinding crosses 200 meshes, and must be sieved particle and 1:10 in mass ratio, and sieving particle is added to 5% hydrochloric acid of mass fraction
In, it is stirred and filters, collect filter cake and being washed with deionized to cleaning solution and be in neutrality, vacuum freeze drying is simultaneously collected
Blapharoplast；Blapharoplast is stirred and is centrifugated with 2mol/L sodium hydroxide solution, in collection by 1:5 in mass ratio
200 mesh aluminium powders are stirred with 5% sodium hydroxide solution of mass fraction and collect to mix by clear liquid, then 1:70 in mass ratio
Liquid, 1:1, supernatant and mixed liquor are stirred and is placed in oil bath heating at 100 DEG C and stands 5h, filter and receive by volume
Collect filtrate, after being aged for 24 hours at room temperature, then the Crystallizing treatment 8h in 300W microwave reactor, filter cake is filtered and collects, at 60 DEG C
Lower dry 8h, obtains modified particles；According to parts by weight, 50 parts of dispersion slurries, 8 parts of 8% polyvinyl alcohol of mass fraction are weighed respectively
Solution and 15 parts of trim,ethylchlorosilanes, 5 part of 200 mesh modified particles are placed in three-necked flask, be stirred be placed under 300W surpass
Sound disperses 15min, must disperse slurries and be placed in insulation reaction 3h at 75 DEG C, obtain reaction sol solutions；Broad-leaved slurry is taken to be placed in beater
In, mashing is placed in 85 ° of SR at room temperature, and it collects pulper slurry and is placed in fluffer, discongest 15min at 15250r/min,
Collection discongests slurries and quantifies 60g/m2 by copy paper, and paper shaping area is 1.00m, carries out copy paper processing, after the completion of copy paper,
L Water Paper page with net encloses load paper plate after removing, and after back and forth being rolled with couch roll, enters back into rod-pressing machine pressure bar, and air blast is dry at 110 DEG C
The dry 30min of dry case, obtains dry base paper；It negates and answers sol solutions and by coating thickness 0.02mm, it is to be coated to dry base paper coating
After the completion, it stands to dry and is placed at 50 DEG C dry 3h, stand to room temperature, the anti-moisture absorption type high-barrier can be prepared into
Food packaging paper material.
Example 1,2,3 prepared by the present invention is detected, taking the paper of uncoated modification is that control group carries out control number
According to specific testing result such as following table table 1:
1 properties of product of table characterize table
Wrapping paper material prepared by the present invention has excellent anti-moisture absorption property as shown in Table 1.
Claims (10)
1. a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material, it is characterised in that specific preparation step are as follows:
(1) it takes bamboo chip and grinds, cross sieve, wash to obtain elution particle and according to parts by weight, respectively 45~50 parts of weighing
5% sodium chlorite solution of mass fraction, 3~5 parts of glacial acetic acid and 10~15 parts of elution particles are placed in three-necked flask, are stirred
And ultrasonic disperse, collect to obtain dispersion slurries；
(2) gangue is taken to be placed in resistance box, heating heating and thermal insulation calcining, standing is cooled to room temperature, crushing grinding, sieving,
Must be sieved particle and 1:10 in mass ratio, and sieving particle is added in hydrochloric acid, is stirred and filters, and collect filter cake and wash
It washs, vacuum freeze drying simultaneously collects blapharoplast；Blapharoplast and sodium hydroxide solution are stirred simultaneously by 1:5 in mass ratio
Centrifuge separation collects supernatant, then 1:70 in mass ratio, aluminium powder is stirred and is collected to mix with sodium hydroxide solution
Liquid；
(3) supernatant is stirred with mixed liquor and oil bath heating and is stood, filters and collect filtrate by 1:1 by volume, old
Change simultaneously Crystallizing treatment, filters and collect filter cake, it is dry that modified particles weigh 45~50 parts of dispersions according to parts by weight respectively
Slurries, 6~8 parts of 8% poly-vinyl alcohol solutions of mass fraction and 10~15 parts of trim,ethylchlorosilanes, 3~5 part of 200 mesh modified particles
It is placed in three-necked flask, is stirred simultaneously ultrasonic disperse, slurries and insulation reaction must be dispersed, obtain reaction sol solutions；
(4) broad-leaved slurry is taken to be placed in beater, mashing processing is collected pulper slurry and is placed in fluffer, discongest processing, collects
Slurries and copy paper processing are discongested, after the completion of copy paper, paper is taken to handle and dry, obtains dry base paper, negated and answer sol solutions and be coated with,
After the completion of to be coated, standing is dried and is dried, and is stood to room temperature, and the anti-moisture absorption type high-barrier food packet can be prepared into
Fill paper material.
2. a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material according to claim 1, feature exist
In: the elution grain diameter is 250~300 μm.
3. a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material according to claim 1, feature exist
In: the heating heating and thermal insulation calcining is is warming up to 950~1000 DEG C by 5 DEG C/min, 10~12h of heat preservation calcining.
4. a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material according to claim 1, feature exist
In: the sieving grain diameter is 200 mesh.
5. a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material according to claim 1, feature exist
In: the concentration of sodium hydroxide solution is 2mol/L.
6. a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material according to claim 1, feature exist
In: the Crystallizing treatment is 6~8h of Crystallizing treatment in 250~300W microwave reactor.
7. a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material according to claim 1, feature exist
In: the pulper slurry beating degree is 83.5~85 ° of SR.
8. a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material according to claim 1, feature exist
In: the processing of discongesting is to discongest 10~15min at 15000~15250r/min.
9. a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material according to claim 1, feature exist
In: to quantify 60g/m2 by copy paper, paper shaping area is 0.25~1.00m for the copy paper processing, carries out copy paper processing.
10. a kind of preparation method of anti-moisture absorption type high-barrier food packaging paper material according to claim 1, feature exist
In: the coating thickness is 0.02mm.
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