CN111204099A - Pullulan high-barrier food packaging film and preparation method thereof - Google Patents

Pullulan high-barrier food packaging film and preparation method thereof Download PDF

Info

Publication number
CN111204099A
CN111204099A CN202010016800.8A CN202010016800A CN111204099A CN 111204099 A CN111204099 A CN 111204099A CN 202010016800 A CN202010016800 A CN 202010016800A CN 111204099 A CN111204099 A CN 111204099A
Authority
CN
China
Prior art keywords
pullulan
film
food packaging
layer
packaging film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010016800.8A
Other languages
Chinese (zh)
Inventor
杨伟
王正海
许君尉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangyin Sunrise Packaging Material Co ltd
Original Assignee
Jiangyin Sunrise Packaging Material Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangyin Sunrise Packaging Material Co ltd filed Critical Jiangyin Sunrise Packaging Material Co ltd
Priority to CN202010016800.8A priority Critical patent/CN111204099A/en
Publication of CN111204099A publication Critical patent/CN111204099A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/05—Alcohols; Metal alcoholates
    • C08K5/053—Polyhydroxylic alcohols

Abstract

The invention relates to a pullulan high-barrier food packaging film which comprises a co-extrusion film, wherein the co-extrusion film sequentially comprises an outer layer, an upper adhesive layer, a barrier layer, a lower adhesive layer and an inner layer from top to bottom; the edible heat sealing layer is formed by coating the pulullan polysaccharide film forming solution on the surface of the inner layer of the co-extruded film in a coating mode, and curing. The heat sealing layer of the food packaging film is made of pullulan, arabinogelatin and glycerin, the advantages of the pullulan and the arabinogelatin in respective film forming are fully utilized, the defects of the pullulan and the arabinogelatin in respective film forming are mutually compensated and improved, the food packaging film has excellent mechanical property, barrier property and heat sealing property, and is used as an inner layer which is in direct contact with food, harmful substances cannot be generated when the food packaging film is heated, and the food packaging film is green and safe.

Description

Pullulan high-barrier food packaging film and preparation method thereof
Technical Field
The invention relates to the technical field of food packaging, and particularly relates to a pullulan high-barrier food packaging film and a preparation method thereof.
Background
The innermost layer of the existing food packaging film in the market, which is in contact with a real object, is generally made of common food-grade Polyethylene (PE), and because the PE is not strong in heat resistance, the film can be hot-melted when the temperature of the PE exceeds 100 ℃, particularly, the packaged food contains a large amount of grease, water and vinegar, so that harmful substances in the film can be dissolved out at high temperature to cause harm to human bodies, and the safe and nontoxic film has great market potential under the background of pursuing safe food along with the continuous abundance of the substance life of people.
Therefore, there is a need to solve the above problems by improving the existing food packaging film through research.
Disclosure of Invention
The first purpose of the invention is to provide a pullulan high-barrier food packaging film.
The second object of the present invention is to provide a method for preparing the pullulan high barrier food packaging film.
In order to achieve the purpose of the invention, the technical scheme of the invention is as follows:
the invention provides a pullulan high-barrier food packaging film, which comprises a co-extrusion film, wherein the co-extrusion film sequentially comprises an outer layer, an upper adhesive layer, a barrier layer, a lower adhesive layer and an inner layer from top to bottom; the edible heat sealing layer is formed by coating the pulullan polysaccharide film forming solution on the surface of the inner layer of the co-extruded film in a coating mode, and curing.
Further, the outer layer and the inner layer are both made of LDPE, and the thickness of the outer layer and the inner layer is 12-50 μm;
the upper adhesive layer and the lower adhesive layer are both made of maleic anhydride modified polyethylene, and the thickness of the upper adhesive layer and the lower adhesive layer is 9-24 mu m;
the barrier layer is made of ethylene-vinyl alcohol copolymer and has a thickness of 3-12 μm.
Further, the main components of the pullulan film-forming solution are pullulan, Arabic gum and glycerol.
Furthermore, the mass ratio of the pullulan polysaccharide to the Arabic gum to the glycerol is (1-2): (2.5-5): 1.
Still further, the mass ratio of the pullulan polysaccharide to the gum arabic to the glycerol is 2:5: 1.
The second aspect of the present invention provides a method for preparing the pullulan high-barrier food packaging film, which comprises the following steps:
s1 preparation of coextruded film
Adding the raw materials into a feeding hopper of an extruder from top to bottom according to the sequence of the outer layer, the upper adhesive layer, the barrier layer, the lower adhesive layer and the inner layer, melting the resins of all layers at the melting temperature of 160-280 ℃, extruding the melted resins into a flow channel corresponding to the hopper, extruding a blank pipe from the extruder, and obtaining the co-extruded film through cooling treatment, secondary blowing and sizing;
s2 preparation of Pullulan polysaccharide film-forming solution
Dissolving pullulan in distilled water, and stirring until the pullulan is completely dissolved to obtain a pullulan solution; dissolving arabic gum in distilled water, stirring at 85-100 deg.C for 2-3h, cooling, adding pullulan aqueous solution, adding glycerol, mixing, and standing at 0-4 deg.C for 12 hr to remove air bubbles to obtain pullulan film-forming solution;
s3, coating
Placing the co-extruded film prepared in the step S1 on a polyethylene flat plate, placing the co-extruded film with the inner layer facing upwards, coating the pulullan film-forming solution prepared in the step S2 on the inner layer of the co-extruded film in a coating manner, and curing to form an edible heat-sealing layer, thus obtaining a semi-finished product of the food packaging film;
s4, curing
And (5) curing the semi-finished product of the food packaging film obtained in the step (S3) for 30-80h in an environment with the humidity of 40-50% to obtain a finished product of the food packaging film.
Further, in the step S1, the blow-up ratio of the secondary blow-up is 1.5 to 4.
Further, in the step S3, the coating amount is 12-49g/m2。
Further, in the step S3, the curing method is ultraviolet curing or oven drying curing.
Compared with the prior art, the invention has the advantages and beneficial effects that:
the heat sealing layer of the food packaging film is made of pullulan, arabinogelatin and glycerin, the advantages of the pullulan and the arabinogelatin in respective film forming are fully utilized, the defects of the pullulan and the arabinogelatin in respective film forming are mutually compensated and improved, the food packaging film has excellent mechanical property, barrier property and heat sealing property, and is used as an inner layer which is in direct contact with food, harmful substances cannot be generated when the food packaging film is heated, and the food packaging film is green and safe.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
The pullulan high-barrier food packaging film comprises a co-extrusion film, wherein the co-extrusion film sequentially comprises an outer layer, an upper adhesive layer, a barrier layer, a lower adhesive layer and an inner layer from top to bottom; the edible heat sealing layer is formed by coating the pulullan polysaccharide film forming solution on the surface of the inner layer of the co-extruded film in a coating mode, and curing.
Further, the outer layer and the inner layer are both made of LDPE, and the thickness of the outer layer and the inner layer is 12 micrometers;
the upper adhesive layer and the lower adhesive layer are both made of maleic anhydride modified polyethylene and have the thickness of 9 mu m;
the barrier layer is made of ethylene-vinyl alcohol copolymer and is 3 mu m thick.
Further, the main components of the pullulan film-forming solution are pullulan, Arabic gum and glycerol.
A preparation method of the pullulan high-barrier food packaging film comprises the following steps:
s1 preparation of coextruded film
Adding raw materials into a feeding hopper of an extruder according to the sequence of an outer layer, an upper adhesive layer, a barrier layer, a lower adhesive layer and an inner layer from top to bottom, melting resins of all layers at the melting temperature of 200 ℃, extruding the melted resins into corresponding runners of the hopper, extruding a blank pipe from the extruder, and obtaining the co-extruded film through cooling treatment, secondary blowing and shaping; wherein the blow-up ratio of the secondary blow-up is 2.
S2 preparation of Pullulan polysaccharide film-forming solution
Weighing 1g of pullulan, dissolving the pullulan in 100ml of distilled water, stirring for 5 minutes to obtain a pullulan aqueous solution, weighing 5g of Arabic gum, dissolving the Arabic gum in 100ml of distilled water at 90 ℃, stirring for 2.5 hours, cooling, adding 1g of glycerol into the pullulan aqueous solution, and standing the mixed solution at 0-4 ℃ for 12 hours to eliminate bubbles to obtain the pullulan film-forming solution.
S3, coating
And (3) placing the co-extruded film prepared in the step S1 on a polyethylene flat plate, placing the inner layer of the co-extruded film upwards, coating the pulullan film-forming solution prepared in the step S2 on the inner layer of the co-extruded film in a coating mode, placing the co-extruded film in an oven at 40 ℃, taking out the co-extruded film after 10 hours, and forming an edible heat-sealing layer to obtain the semi-finished product of the food packaging film.
S4, curing
And (5) curing the semi-finished product of the food packaging film obtained in the step (S3) for 30 hours in an environment with the humidity of 45% to obtain a finished product of the food packaging film.
Example 2
The only difference compared to example 1 is: 2g of pullulan was weighed out, and the rest was the same as in example 1.
Example 3
The only difference compared to example 1 is: 2.5g of gum arabic are weighed out and the rest is as in example 1.
Example 4
The only difference compared to example 1 is: 2g of pullulan was weighed, 2g of glycerol was added, and the rest was the same as in example 1.
Comparative example 1
A coextruded film made in example 1.
Performance detection
The above examples 1 to 4 and comparative example 1 were each subjected to the following tests:
(1) tensile strength and elongation at break test: the test pieces were tested in the length of 150mm and the width of 15mm, the distance between the clamps was 50mm, and the tensile speed was 300mm/min, according to ASTM D882-2012, Standard test method for tensile Properties of thin Plastic plates, for 3 longitudinal and transverse test pieces, respectively.
(2) Oxygen transmission rate: the test was performed according to the standard of ASTM D3985 Standard test method for measuring the transfer rate of oxygen through plastic films and sheets using a coulometric sensor.
(3) Oil and fat transmittance: the test was carried out according to the GB/T1699-1997 "oil permeability for packaging materials test methods".
(4) Water vapor transmission rate: the test was carried out according to ASTM F1249 Standard test method Water vapor Transmission Rate through Plastic films and sheets Using modulated Infrared Sensors.
(5) Light transmittance: the test is carried out according to the standard of GB/T2410 transparent plastic light transmittance and haze test method.
(6) Water melting time: a3 cm multiplied by 3cm sample is taken and put into a container with distilled water at the temperature of 90 ℃, and the time of dissolving the edible layer on the surface in the water is observed, and the time is the water melting time.
The above tests are carried out by placing a sample with a thickness of 40 +/-3 um for 0-5h at 23 +/-2 ℃ and 50 +/-10% RH by using a micrometer, and the detection data are shown in the following table 1:
TABLE 1
Example 1 Example 2 Example 3 Example 4 Comparative example 1
Tensile strength (Mpa) 21.88 24.14 23.56 18.53 18
Elongation at Break (%) 309.96 309.46 306.51 310.81 300
Oxygen transmission rate (ml/m)2·d) 1.93 0.28 0.20 2.35 2.5
Oil and fat permeability (g/m)2·d) - - - - -
Water vapor transmission rate (g/m)2·d) 179.70 202.93 91.84 207 250
Light transmittance (%) 89.89 90.16 90.29 86.66 95
Time of melting water(s) 7 15.33 20.67 12 -
From examples 1 and 2, it can be seen that as the addition amount of pullulan increases, the water vapor transmission rate and tensile strength of the packaging film increase slightly; the time for the heat-sealing layer to dissolve in water is gradually increased; the elongation at break and the light transmittance are almost unchanged; the reduction amplitude of the oxygen transmission rate is large; however, the oil and fat permeability was not detected, which was determined by the dense structure and hydrophilicity of both polymers of pullulan and gum arabic.
It can be seen from examples 2 and 3 that, as the amount of gum arabic added increases, the water vapor transmission rate of the packaging film decreases to a greater extent, the oxygen transmission rate and the elongation at break decrease to some extent, the time for the heat-seal layer to dissolve in water increases, the transmission rate and the tensile strength hardly change, and the oil and fat transmission rate remains undetected.
From examples 2 and 4, it can be seen that, as the addition amount of glycerin is gradually increased, the time for dissolving the heat-seal layer of the packaging film in water is reduced, and the water vapor transmission rate is increased, on one hand, because the film forming raw materials of the composite film are all hydrophilic substances, on the other hand, glycerin is also hydrophilic, so that the intermolecular force among polymer chains is reduced, the free volume is increased, and the water vapor transmission rate is increased; the increase in the amount of glycerin also decreases the tensile strength of the packaging film and increases the elongation at break, which is the addition of the plasticizer glycerin increases the flexibility of the film.
As can be seen from comparative example 1 and example 1, the co-extruded films without being treated with the pullulan film-forming solution had inferior tensile strength, elongation at break, oxygen transmittance, water vapor transmittance, and light transmittance.
In summary, in the pullulan film-forming solution of the present invention, when the mass ratio of pullulan to gum arabic to glycerin is 2:5:1, the obtained packaging film has the best mechanical properties and barrier properties.
While the preferred embodiments of the present invention have been described in detail, it is to be understood that the invention is not limited to those precise embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined in the appended claims.

Claims (9)

1. The pullulan high-barrier food packaging film is characterized by comprising a co-extrusion film, wherein the co-extrusion film sequentially comprises an outer layer, an upper adhesive layer, a barrier layer, a lower adhesive layer and an inner layer from top to bottom; the edible heat sealing layer is formed by coating the pulullan polysaccharide film forming solution on the surface of the inner layer of the co-extruded film in a coating mode, and curing.
2. The pullulan high-barrier food packaging film according to claim 1, wherein the outer layer and the inner layer are both made of LDPE and have a thickness of 12-50 μm;
the upper adhesive layer and the lower adhesive layer are both made of maleic anhydride modified polyethylene, and the thickness of the upper adhesive layer and the lower adhesive layer is 9-24 mu m;
the barrier layer is made of ethylene-vinyl alcohol copolymer and has a thickness of 3-12 μm.
3. The pullulan high-barrier food packaging film according to claim 1, wherein the pullulan film forming solution mainly comprises pullulan, gum arabic and glycerin.
4. The pullulan high-barrier food packaging film according to claim 3, wherein the mass ratio of pullulan to gum arabic to glycerin is (1-2): (2.5-5): 1.
5. The pullulan high-barrier food packaging film according to claim 4, wherein the mass ratio of pullulan to gum arabic to glycerin is 2:5: 1.
6. The method for preparing the pullulan high-barrier food packaging film according to any one of claims 1 to 5, comprising the following steps of:
s1 preparation of coextruded film
Adding raw materials into a feeding hopper of an extruder from top to bottom according to the sequence of an outer layer, an upper adhesive layer, a barrier layer, a lower adhesive layer and an inner layer, melting resins of all layers at the melting temperature of 160-280 ℃, extruding the melted resins into a runner corresponding to the hopper, extruding a blank pipe from the extruder, and obtaining the co-extruded film through cooling treatment, secondary blowing and sizing;
s2 preparation of Pullulan polysaccharide film-forming solution
Dissolving pullulan in distilled water, and stirring until the pullulan is completely dissolved to obtain a pullulan solution; dissolving arabic gum in distilled water, stirring at 85-100 deg.C for 2-3h, cooling, adding pullulan aqueous solution, adding glycerol, mixing, and standing at 0-4 deg.C for 12 hr to remove air bubbles to obtain pullulan film-forming solution;
s3, coating
Placing the co-extruded film prepared in the step S1 on a polyethylene flat plate, placing the co-extruded film with the inner layer facing upwards, coating the pulullan film-forming solution prepared in the step S2 on the inner layer of the co-extruded film in a coating manner, and curing to form an edible heat-sealing layer, thus obtaining a semi-finished product of the food packaging film;
s4, curing
And (5) curing the semi-finished product of the food packaging film obtained in the step (S3) for 30-80h in an environment with the humidity of 40-50% to obtain a finished product of the food packaging film.
7. The method for preparing a pullulan high-barrier food packaging film according to claim 6, wherein in the step S1, the blow-up ratio of the secondary blowing is 1.5-4.
8. The method for preparing the pullulan high-barrier food packaging film according to claim 6, wherein in the step S3, the coating amount is 12-49g/m2。
9. The method for preparing the pullulan high-barrier food packaging film according to claim 6, wherein in the step S3, the curing mode is ultraviolet light curing or oven drying curing.
CN202010016800.8A 2020-01-08 2020-01-08 Pullulan high-barrier food packaging film and preparation method thereof Pending CN111204099A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010016800.8A CN111204099A (en) 2020-01-08 2020-01-08 Pullulan high-barrier food packaging film and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010016800.8A CN111204099A (en) 2020-01-08 2020-01-08 Pullulan high-barrier food packaging film and preparation method thereof

Publications (1)

Publication Number Publication Date
CN111204099A true CN111204099A (en) 2020-05-29

Family

ID=70780455

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010016800.8A Pending CN111204099A (en) 2020-01-08 2020-01-08 Pullulan high-barrier food packaging film and preparation method thereof

Country Status (1)

Country Link
CN (1) CN111204099A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610914A (en) * 1981-08-05 1986-09-09 American Can Company Oriented films of blends of EVOH copolymer
EP0561428A1 (en) * 1986-02-28 1993-09-22 W.R. Grace & Co.-Conn. Oxygen barrier packaging film
CN102555379A (en) * 2011-12-16 2012-07-11 江阴升辉包装材料有限公司 Highly obstructed multilayer coextrusion thermal shrink film
CN102717563A (en) * 2006-08-07 2012-10-10 库纳设备制造有限责任公司 Multilayer sheet- or tube-type food casing or food film
CN103112226A (en) * 2013-02-19 2013-05-22 黄山永新股份有限公司 Seven-layer coextruded high-barrier transparency film and preparation method thereof
CN106854300A (en) * 2016-12-02 2017-06-16 中国肉类食品综合研究中心 A kind of poly-blended film and preparation method and application

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610914A (en) * 1981-08-05 1986-09-09 American Can Company Oriented films of blends of EVOH copolymer
EP0561428A1 (en) * 1986-02-28 1993-09-22 W.R. Grace & Co.-Conn. Oxygen barrier packaging film
CN102717563A (en) * 2006-08-07 2012-10-10 库纳设备制造有限责任公司 Multilayer sheet- or tube-type food casing or food film
CN102555379A (en) * 2011-12-16 2012-07-11 江阴升辉包装材料有限公司 Highly obstructed multilayer coextrusion thermal shrink film
CN103112226A (en) * 2013-02-19 2013-05-22 黄山永新股份有限公司 Seven-layer coextruded high-barrier transparency film and preparation method thereof
CN106854300A (en) * 2016-12-02 2017-06-16 中国肉类食品综合研究中心 A kind of poly-blended film and preparation method and application

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张源超: "普鲁兰多糖复合抑菌涂膜剂的制备及其对鸡蛋的保鲜效果", 《食品科学》 *

Similar Documents

Publication Publication Date Title
US20110274892A1 (en) Biaxially oriented bio-based polyolefin films and laminates
JP2019090026A (en) Improved flexible evoh for high performance film
CN109049918B (en) Antifogging toughening antibacterial cast polypropylene food packaging film and preparation method thereof
CN102248735A (en) Polyolefin film used for packaging and preparation method thereof
CN1442445A (en) Polyolefin resin composition and contraction film using said resin composition
CN102139552A (en) Polypropylene double-way stretched film and preparation method thereof
CN110545995B (en) Multilayer structure, method for manufacturing multilayer structure, and related article
CN102120903A (en) Water-resistant modified polyvinyl alcohol coating liquid and preparation method thereof, and coating formed by coating liquid
CN103085415A (en) Packaging polyolefin film and preparation method thereof
CN101323685A (en) Linear low density blending film of polyethylene and ethylene-ethenol copolymer and method for making the same
WO2014179451A1 (en) Multilayer film
JP2017114037A (en) Multilayered polyethylene-based sealant film and laminate film using the same
JPH0717806B2 (en) Resin composition
FI90986C (en) Use of an extrudable ethylene-hydroxyacrylate blend polymer
US20230339223A1 (en) Plastic film, plastic bag and preparation method of plastic film
CN109159501A (en) A kind of high biomass content high barrier biology base packing container and preparation method thereof
CN110920185A (en) High-barrier puncture-resistant irradiation-resistant crosslinked multilayer heat shrinkable film and preparation method thereof
CN111204099A (en) Pullulan high-barrier food packaging film and preparation method thereof
CN110385905B (en) Laminated co-extrusion film containing double-protection core barrier layers and production process thereof
CN111590988B (en) Processing method of NY/RCPP composite film for high-temperature steaming bag
EP3019551B1 (en) Process of coating plastic containers with gas barrier coating to achieve improved moisture resistivity
FI73923C (en) Polyamide-containing multilayer film
CN115923289A (en) High-transparency high-strength polyethylene heat shrinkable film and preparation method thereof
WO2020068497A1 (en) Multilayer films and methods of making the same
CN115612138A (en) High-barrier film, sheet or container and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20200529

WD01 Invention patent application deemed withdrawn after publication