CN108749241A - A kind of antibiotic plastic sheet material and preparation method for liquid food packing - Google Patents

A kind of antibiotic plastic sheet material and preparation method for liquid food packing Download PDF

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Publication number
CN108749241A
CN108749241A CN201810378445.1A CN201810378445A CN108749241A CN 108749241 A CN108749241 A CN 108749241A CN 201810378445 A CN201810378445 A CN 201810378445A CN 108749241 A CN108749241 A CN 108749241A
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layer
plastic sheet
evoh
sheet material
liquid food
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陈庆
昝航
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Chengdu New Keli Chemical Science Co Ltd
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Chengdu New Keli Chemical Science Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/082—Layered products comprising a layer of metal comprising metal 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 comprising vinyl resins; comprising acrylic resins
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/085—Layered products comprising a layer of metal comprising metal 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 comprising polyolefins
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • 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
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D105/00—Coating compositions based on polysaccharides or on their derivatives, not provided for in groups C09D101/00 or C09D103/00
    • C09D105/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • 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
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • 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
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Plant Pathology (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a kind of antibiotic plastic sheet materials and preparation method for liquid food packing.The antibiotic plastic sheet material is made by following steps：A, using EVOH/ aluminium foils mixed layer as substrate, upper and lower both sides even spread chitosan coating liquid；B, silver nitrate solution and hydrazine hydrate are sprayed on the chitosan coating liquid of substrate both sides, antibacterial modified EVOH/ aluminium foils mixed layer is made；C, by printing layer, bonding resin layer, antibacterial modified EVOH/ aluminium foils mixed layer, be protected from light hot sealing layer and successively bond, you can the antibacterial modified plastic sheet for liquid food packing is made.The method has the advantages that：By the chitosan for being loaded with nano silver antimicrobials in EVOH/ aluminium foil mixed layers both sides Compound Negative, it has been obviously improved anti-microbial property, so that barrier property is superimposed with anti-microbial property, and enhance the intensity of package sheet material, and the nano silver particles and chitosan surface hydroxyl precipitated generate chemical bond and physical absorption, it is tightly combined, effectively extends antibiotic and sterilizing action time.

Description

A kind of antibiotic plastic sheet material and preparation method for liquid food packing
Technical field
The present invention relates to field of compound material, and in particular to the preparation of antibiotic packaging material is used for more particularly, to one kind The antibiotic plastic sheet material and preparation method of liquid food packing.
Background technology
Currently, domestic liquid food packing principal mode is film class packaging, papery class packaging, plastic bottle, vial.By The characteristic possessed by liquid food itself, all using 100% plastic raw materials, the liquid packaging film of manufacture, or use paper, Plastics, metallic aluminium synthetic fluid packaging film, at all can not using biodegradable packaging material come packing liquid food, so Huge pressure is brought to environmental protection, while also consuming the pressure that a large amount of petroleum resources and papermaking are brought to environment, Paper, modeling, aluminium film structure at all can not recyclings simultaneously.
Papery class packaging have be beautifully printed, be various informative, being convenient for carrying, sterilization technology is advanced, long shelf-life, more pacifies Entirely, the advantages that being more convenient.But its cost is too high, technical monopoly, waste is not easily recycled.Plastic bottle is easy to carry, light weight, It is at low cost, impact resistance is good, breakage-proof, leakproof, the repeatable opening and closing of lid, recoverable；The disadvantage is that recycling and cleaning are difficult.Glass Glass bottle is at low cost, recoverable；Disadvantage remains recycling and cleaning is difficult.It is aobvious according to the relevant information of U.S.'s package mechanism Show, the development trend of global dairy products packing is mainly：（1）Light weight, sterile, green package become mainstream；（2）Glass, metal etc. Heavy packages are gradually withdrawn from the market；（3）Super-thin plastic packaging is gradually eliminated；（4）Light weight flexible package will rapidly develop.Liquid at present State food security high-barrier composite film, including thin-film body, by Biaxial tension polyethylene film or simple tension polypropylene film Layer, printing layer, high-barrier coating layer, adhesive layer and it is protected from light that hot sealing layer is stacked to be combined into one, the research to such composite material Certain achievement is obtained.
Number of patent application 201710249719.2 discloses a kind of antibacterial multilayer high score of the barrier for liquid food packing Sub- composite material and preparation method, belongs to field of packaging material.The antibacterial multiple high polymer composite material of the barrier is from upper PE resin layers, TIE adhesive layers, PA/EVOH/PA mixed layers, TIE adhesive layers, PE resin layers are followed successively by under and, wherein PE layers is branch Layer is supportted, PA/EVOH/PA mixed layers are barrier layers.The invention uses PP TYPE processing technology, the layer high molecule of preparation multiple Condensation material has preferable barrier property, environment friendly and pollution-free, compression resistance, fungi-proofing fresh-keeping, is immersed in each class I liquid I and remains to for a long time Keep higher peel strength, this material especially suitable for food liquid, as liquid milk, fruit drink, alcohol product and The packaging of drinking water, using the material packaging food need not addition preservative, also can the long period it is fresh-keeping.Processing technology letter It is single, it is of low cost, it is suitble to industrialized production, there are good market prospects.
Number of patent application 201410021461.7 discloses a kind of food liquid paper-plastic stick flexible packing material, box-packed white wine Special box and its production technology, including A, B, C, D, E layers, it is characterised in that：A is PE plastic protective layers, and B is bonding glue-line, and C is Combination board layer, D are bonding glue-line, and E is EVOH- ethylene/vinyl alcohol copolymer seven-layer co-extrusion high-isolating plastic film layers, the invention The production technology of food liquid paper-plastic stick flexible packing material：Its structure is PE/TIE/PA/EVOH/PA/TIE/PE seven-layer co-extrusions Blow molding process and molding thickness is combined between 0.06 ~ 0.08mm with cardboard.The invention product can substitute tradition completely Vial, the weight of food packaging is alleviated, to reduce production, transportation cost and the consumption of the energy, while the packaging Material block layer is instead of with aluminum foil metal being at present that barrier layer recycles not degradable environmental issue.
Number of patent application 201710727686.8 discloses a kind of corrugated paper packaging box of food liquid, including corrugated paper Outer box, the bag film being built in outer box and the interior lining panel being arranged between corrugated paper outer box inner wall and bag film, bag film Equipped with the pouring spout with sealing cover, the top or top of corrugated paper outer box are equipped with mounting hole, and pouring spout is worn from the mounting hole Go out and is fixed with corrugated paper outer box.The invention provide packing box have stronger intensity, can substitute existing blow molded bottle or Plastic cement pot reduces packing cost.
Number of patent application 201710314865.9 discloses a kind of safe high-barrier composite membrane of liquid food packing, successively It is set as biopolymer layer, printing layer, strengthens film layer one, metal layer, strengthens film layer two, is protected from light hot sealing layer.The invention is in pure aluminum foil Layer both sides are both provided with reinforcing film layer, substantially increase the blocking oxygen of aluminium foil layer and the ability of sealing, multiple so as to improve Barrier, the security performance for closing film, enhance the sealing effect of composite membrane, extend the shelf lives of food liquid, are processed in composite membrane In the process, it will be bonded again with other film layers after fine aluminium layers of foil and the bonding of the reinforcing film layer of both sides, fine aluminium layers of foil can not only be improved With the adhesive strength between reinforcing film layer, moreover it is possible to which the difficulty of processing for reducing composite membrane improves the total quality performance of composite membrane.
It can be seen that it is not high for the intensity and barrier property of the material of liquid food packing in the prior art, it cannot be effective Ensure the safety of product, existing high-barrier coating layer self performance defect protectiveness is undesirable, and anti-microbial property is poor, existing Antimicrobial coating adhesive strength it is insufficient, the problems such as causing antibiotic and sterilizing action time short.
Invention content
Effectively to solve above-mentioned technical problem, the present invention proposes a kind of antibiotic plastic sheet material for liquid food packing And preparation method, anti-microbial property and the antibiotic and sterilizing action time of sheet material can be effectively improved, and barrier property is good, sheet strength It is high.
The specific technical solution of the present invention is as follows：
A kind of preparation method of antibiotic plastic sheet material for liquid food packing, the antibiotic plastic sheet material be by printing layer, EVOH/ aluminium foils mixed layer that bonding resin layer, surface contain nano silver antimicrobials, be protected from light hot sealing layer by top-down sequence by Layer bonding forms, and specific preparation process is：
A, using EVOH/ aluminium foils mixed layer as substrate, in the even spread chitosan coating liquid of both sides up and down of substrate；
B, silver nitrate solution and hydrazine hydrate are sprayed on the chitosan coating liquid of substrate both sides by sprayed deposit, reduction is made to generate Nano silver antimicrobials be dispersed in the surface of chitosan film layer, antibacterial modified EVOH/ aluminium foils mixed layer is made；
C, by printing layer, bonding resin layer, antibacterial modified EVOH/ aluminium foils mixed layer, be protected from light hot sealing layer by top-down sequence It successively bonds, you can the antibacterial modified plastic sheet for liquid food packing is made.
Preferably, in the step a, the EVOH of EVOH/ aluminium foil mixed layers is 70 ~ 80 parts by weight, aluminium foil is 20 ~ 30 weight Part.
Preferably, in the step a, in chitosan coating liquid, 35 ~ 50 parts by weight of chitosan, 1 ~ 3 weight of cellulose ether Part, 47 ~ 64 parts by weight of water.
Preferably, in the step b, the mass concentration of silver nitrate solution is 60 ~ 70%, 75 ~ 80 weight of silver nitrate solution Part, 20 ~ 25 parts by weight of hydrazine hydrate.
Preferably, in the step b, the rotation speed of fan of sprayed deposit is 2000 ~ 2800r/min, atomisation pressure is 1 ~ 1.5MPa, capacity of sprinkler are 1000 ~ 1400mL/min.
Preferably, in the step c, printing layer is one kind in polyethylene layer, cast polypropylene layer or polyvinyl chloride layer.
Preferably, in the step c, bonding resin layer is epoxy resin layer, layer of polyurethane, has base silicone layer or polyamides At least one of imine layer.
Preferably, in the step c, it is two layers of co-extrusion film of polyethylene black and white, polyethylene three-layer extrusion film to be protected from light hot sealing layer At least one of.
Preferably, in the step c, the thickness of printing layer is 20 ~ 40 μm, and the thickness of bonding resin layer is 0.5 ~ 3 μm, is resisted The thickness that bacterium is modified EVOH/ aluminium foil mixed layers is 50 ~ 100 μm, and the thickness for being protected from light hot sealing layer is 5 ~ 20 μm.
Nano silver has very strong bactericidal effect, and permeability is strong, broad-spectrum sterilization and without any drug resistance, to the overwhelming majority Gram-positive bacteria and Gram-negative bacteria even some resistant strains have good killing effect, in anti-biotic material field Cause extensive concern.Chitosan is a kind of naturally occurring alkaline polysaccharide, safe and non-toxic, biodegradable natural polymer, Have the characteristics that good biocompatibility, it is nontoxic, can be fully absorbed by organism and with antibacterial, hemostasis and inhibit cancer thin The effect that dysuria with lower abdominal colic is moved.Therefore, in the present invention that nano silver and chitosan progress is compound, chitosan and nano silver particles can be kept Major advantage has the bacteriostasis antibiosis of good biocompatibility and wide spectrum, and safety is good when for food packaging, and surface Chemical bond and physical absorption are combined closely with EVOH/ aluminium foils, are played the high barrier of EVOH/ aluminium foils, are promoted the strong of composite material Degree and durability.
The present invention is also for a kind of a kind of antibacterial plastic sheet for liquid food packing that above-mentioned preparation method is prepared Material introduces anti-microbial property by being loaded with the chitosan of nano silver antimicrobials in EVOH/ aluminium foil mixed layers both sides Compound Negative so that Barrier property is superimposed with anti-microbial property, while enhancing the intensity of package sheet material；The nano silver particles of precipitation and chitosan surface Hydroxyl generates chemical bond and physical absorption, combines closely, extends antibiotic and sterilizing action time.Main process is：A, with EVOH/ Aluminium foil mixed layer is substrate, upper and lower both sides even spread chitosan coating liquid；B, silver nitrate solution and hydrazine hydrate are sprayed on substrate On the chitosan coating liquid of both sides, antibacterial modified EVOH/ aluminium foils mixed layer is made；C, printing layer, bonding resin layer, antibacterial are changed Property EVOH/ aluminium foils mixed layer is protected from light hot sealing layer and successively bonds.
Beneficial effects of the present invention are：
1. proposing the side for the antibiotic plastic sheet material that sprayed deposit silver nitrate solution is prepared with chitosan for liquid food packing Method.
2. the chitosan of the invention by being loaded with nano silver antimicrobials in EVOH/ aluminium foil mixed layers both sides Compound Negative, significantly Improve anti-microbial property so that barrier property is superimposed with anti-microbial property, and enhances the intensity of package sheet material.
3. nano silver particles and chitosan surface hydroxyl that the present invention precipitates in preparing generate chemical bond and physical absorption, knot It closes closely, effectively extends antibiotic and sterilizing action time.
Specific implementation mode
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
A, using EVOH/ aluminium foils mixed layer as substrate, in the even spread chitosan coating liquid of both sides up and down of substrate；
B, silver nitrate solution and hydrazine hydrate are sprayed on the chitosan coating liquid of substrate both sides by sprayed deposit, obtained antibacterial changes Property EVOH/ aluminium foil mixed layers；
C, by printing layer, bonding resin layer, antibacterial modified EVOH/ aluminium foils mixed layer, be protected from light hot sealing layer by top-down sequence It successively bonds, you can the antibacterial modified plastic sheet for liquid food packing is made.
In step c, printing layer is polyethylene layer；In step c, bonding resin layer is epoxy resin layer；In step c, it is protected from light Hot sealing layer is two layers of co-extrusion film of polyethylene black and white；In step c, the thickness of printing layer is 30 μm, and the thickness of bonding resin layer is 2 μ The thickness of m, antibacterial modified EVOH/ aluminium foils mixed layer are 80 μm, and the thickness for being protected from light hot sealing layer is 12 μm.
In step b, the rotation speed of fan of sprayed deposit is 2400r/min, atomisation pressure 1.3MPa, and capacity of sprinkler is 1200mL/min；
In step a, the EVOH of EVOH/ aluminium foil mixed layers is 75 parts by weight, aluminium foil is 25 parts by weight；In step a, chitosan coating In liquid, 42 parts by weight of chitosan, 2 parts by weight of cellulose ether, 56 parts by weight of water；In step b, the mass concentration of silver nitrate solution is 65%, 78 parts by weight of silver nitrate solution, 22 parts by weight of hydrazine hydrate.
Embodiment 2
A, using EVOH/ aluminium foils mixed layer as substrate, in the even spread chitosan coating liquid of both sides up and down of substrate；
B, silver nitrate solution and hydrazine hydrate are sprayed on the chitosan coating liquid of substrate both sides by sprayed deposit, obtained antibacterial changes Property EVOH/ aluminium foil mixed layers；
C, by printing layer, bonding resin layer, antibacterial modified EVOH/ aluminium foils mixed layer, be protected from light hot sealing layer by top-down sequence It successively bonds, you can the antibacterial modified plastic sheet for liquid food packing is made.
In step c, printing layer is cast polypropylene layer；In step c, bonding resin layer is layer of polyurethane；In step c, keep away Photo-thermal sealing is polyethylene three-layer extrusion film；In step c, the thickness of printing layer is 20 μm, and the thickness of bonding resin layer is 0.5 μ The thickness of m, antibacterial modified EVOH/ aluminium foils mixed layer are 50 μm, and the thickness for being protected from light hot sealing layer is 5 μm.
In step b, the rotation speed of fan of sprayed deposit is 2000r/min, atomisation pressure 1MPa, and capacity of sprinkler is 1000mL/min；
In step a, the EVOH of EVOH/ aluminium foil mixed layers is 70 parts by weight, aluminium foil is 30 parts by weight；In step a, chitosan coating In liquid, 35 parts by weight of chitosan, 1 parts by weight of cellulose ether, 64 parts by weight of water；In step b, the mass concentration of silver nitrate solution is 60%, 75 parts by weight of silver nitrate solution, 25 parts by weight of hydrazine hydrate.
Embodiment 3
A, using EVOH/ aluminium foils mixed layer as substrate, in the even spread chitosan coating liquid of both sides up and down of substrate；
B, silver nitrate solution and hydrazine hydrate are sprayed on the chitosan coating liquid of substrate both sides by sprayed deposit, obtained antibacterial changes Property EVOH/ aluminium foil mixed layers；
C, by printing layer, bonding resin layer, antibacterial modified EVOH/ aluminium foils mixed layer, be protected from light hot sealing layer by top-down sequence It successively bonds, you can the antibacterial modified plastic sheet for liquid food packing is made.
In step c, printing layer is polyvinyl chloride layer；In step c, bonding resin layer is to have base silicone layer；In step c, It is polyethylene three-layer extrusion film to be protected from light hot sealing layer；In step c, the thickness of printing layer is 40 μm, and the thickness of bonding resin layer is 3 μ The thickness of m, antibacterial modified EVOH/ aluminium foils mixed layer are 100 μm, and the thickness for being protected from light hot sealing layer is 20 μm.
In step b, the rotation speed of fan of sprayed deposit is 2800r/min, atomisation pressure 1.5MPa, and capacity of sprinkler is 1400mL/min；
In step a, the EVOH of EVOH/ aluminium foil mixed layers is 80 parts by weight, aluminium foil is 20 parts by weight；In step a, chitosan coating In liquid, 50 parts by weight of chitosan, 3 parts by weight of cellulose ether, 47 parts by weight of water；In step b, the mass concentration of silver nitrate solution is 70%, 80 parts by weight of silver nitrate solution, 20 parts by weight of hydrazine hydrate.
Embodiment 4
A, using EVOH/ aluminium foils mixed layer as substrate, in the even spread chitosan coating liquid of both sides up and down of substrate；
B, silver nitrate solution and hydrazine hydrate are sprayed on the chitosan coating liquid of substrate both sides by sprayed deposit, obtained antibacterial changes Property EVOH/ aluminium foil mixed layers；
C, by printing layer, bonding resin layer, antibacterial modified EVOH/ aluminium foils mixed layer, be protected from light hot sealing layer by top-down sequence It successively bonds, you can the antibacterial modified plastic sheet for liquid food packing is made.
In step c, printing layer is polyethylene layer；In step c, bonding resin layer is polyimide layer；In step c, it is protected from light Hot sealing layer is two layers of co-extrusion film of polyethylene black and white；In step c, the thickness of printing layer is 50 μm, and the thickness of bonding resin layer is 1 μ The thickness of m, antibacterial modified EVOH/ aluminium foils mixed layer are 60 μm, and the thickness for being protected from light hot sealing layer is 10 μm.
In step b, the rotation speed of fan of sprayed deposit is 2200r/min, atomisation pressure 1MPa, and capacity of sprinkler is 1100mL/min；
In step a, the EVOH of EVOH/ aluminium foil mixed layers is 72 parts by weight, aluminium foil is 28 parts by weight；In step a, chitosan coating In liquid, 40 parts by weight of chitosan, 1 parts by weight of cellulose ether, 59 parts by weight of water；In step b, the mass concentration of silver nitrate solution is 62%, 76 parts by weight of silver nitrate solution, 24 parts by weight of hydrazine hydrate.
Embodiment 5
A, using EVOH/ aluminium foils mixed layer as substrate, in the even spread chitosan coating liquid of both sides up and down of substrate；
B, silver nitrate solution and hydrazine hydrate are sprayed on the chitosan coating liquid of substrate both sides by sprayed deposit, obtained antibacterial changes Property EVOH/ aluminium foil mixed layers；
C, by printing layer, bonding resin layer, antibacterial modified EVOH/ aluminium foils mixed layer, be protected from light hot sealing layer by top-down sequence It successively bonds, you can the antibacterial modified plastic sheet for liquid food packing is made.
In step c, printing layer is polyvinyl chloride layer；In step c, bonding resin layer is polyimide layer；In step c, keep away Photo-thermal sealing is polyethylene three-layer extrusion film；In step c, the thickness of printing layer is 35 μm, and the thickness of bonding resin layer is 2 μm, The thickness of antibacterial modified EVOH/ aluminium foils mixed layer is 80 μm, and the thickness for being protected from light hot sealing layer is 15 μm.
In step b, the rotation speed of fan of sprayed deposit is 2600r/min, atomisation pressure 1.4MPa, and capacity of sprinkler is 1300mL/min；
In step a, the EVOH of EVOH/ aluminium foil mixed layers is 77 parts by weight, aluminium foil is 23 parts by weight；In step a, chitosan coating In liquid, 48 parts by weight of chitosan, 2 parts by weight of cellulose ether, 50 parts by weight of water；In step b, the mass concentration of silver nitrate solution is 66%, 78 parts by weight of silver nitrate solution, 22 parts by weight of hydrazine hydrate.
Comparative example 1
A, using EVOH/ aluminium foils mixed layer as substrate；
B, by printing layer, bonding resin layer, EVOH/ aluminium foils mixed layer, be protected from light hot sealing layer and successively bonded by top-down sequence, It can be prepared by the plastic sheet for liquid food packing.
In step b, printing layer is polyethylene layer；In step b, bonding resin layer is epoxy resin layer；In step b, it is protected from light Hot sealing layer is two layers of co-extrusion film of polyethylene black and white；In step b, the thickness of printing layer is 30 μm, and the thickness of bonding resin layer is 2 μ The thickness of m, EVOH/ aluminium foil mixed layer is 80 μm, and the thickness for being protected from light hot sealing layer is 12 μm.
In step a, the EVOH of EVOH/ aluminium foil mixed layers is 75 parts by weight, aluminium foil is 25 parts by weight；
Plastic sheet made from above-described embodiment 1 ~ 5 and comparative example 1 tests its anti-microbial property, barrier property and tensile strength, surveys The method or condition for sign of taking temperature are as follows：
Anti-microbial property：Plastic sheet made from embodiment 1 ~ 5 and comparative example 1 is made long 100mm respectively, the sample of wide 100mm, Escherichia coli, golden yellow staphylococcus are inoculated in respectively in liquid nutrient broth culture medium, are 100r/min's in 37 DEG C, rotating speed Activation for 24 hours, then aseptically takes each 1g of above-mentioned bacterium solution in shaking table, sample in drop, covering PE films, 37 DEG C of constant temperatures Lower preservation obtains initial clump count under being diluted at 100 times using dilution plate counting method, is then surveyed respectively with 48h for 24 hours Try clump count.
Barrier property：Using pressure differential method, chamber is divided into two separate spaces using plastic sheet, side vacuumizes, 25 DEG C, under 55% relative humidity, apply the oxygen of 1MPa, for 24 hours after, the amount of oxygen penetrated is measured using OTR oxygen transmission rate tester V, sheet area S, sheet thickness A（mm）, utilize OTR oxygen transmission rate GTR=V/（S·A）To get OTR oxygen transmission rate；25 DEG C, under 55% relative humidity, carry out steam permeability test, using testing vapor transmission instrument, plastic sheet is tested with seasoning Water vapor transmittance.
Tensile strength：Standard batten is made in plastic sheet according to the requirement of GB-T 1040.1-2006, it is strong using stretching It spends testing machine and tensile strength test is carried out to wood-plastic composite panel sample, be 25 in temperature with the test speed of 200mm/min DEG C, relative humidity is tested under conditions of being 65%, is obtained tensile strength, is characterized its tensile property.
The results are shown in Table 1.
Table 1：

Claims (10)

1. a kind of preparation method of antibiotic plastic sheet material for liquid food packing, it is characterised in that：The antibacterial plastic sheet Material is the EVOH/ aluminium foils mixed layer for containing nano silver antimicrobials by printing layer, bonding resin layer, surface, is protected from light hot sealing layer by certainly Successively bonding forms sequence under above, and specific preparation process is：
A, using EVOH/ aluminium foils mixed layer as substrate, in the even spread chitosan coating liquid of both sides up and down of substrate；
B, silver nitrate solution and hydrazine hydrate are sprayed on the chitosan coating liquid of substrate both sides by sprayed deposit, reduction is made to generate Nano silver antimicrobials be dispersed in the surface of chitosan film layer, antibacterial modified EVOH/ aluminium foils mixed layer is made；
C, by printing layer, bonding resin layer, antibacterial modified EVOH/ aluminium foils mixed layer, be protected from light hot sealing layer by top-down sequence It successively bonds, you can the antibacterial modified plastic sheet for liquid food packing is made.
2. a kind of preparation method of antibiotic plastic sheet material for liquid food packing, feature exist according to claim 1 In：In the step a, the EVOH of EVOH/ aluminium foil mixed layers is 70 ~ 80 parts by weight, aluminium foil is 20 ~ 30 parts by weight.
3. a kind of preparation method of antibiotic plastic sheet material for liquid food packing, feature exist according to claim 1 In：In the step a, in chitosan coating liquid, 35 ~ 50 parts by weight of chitosan, 1 ~ 3 parts by weight of cellulose ether, 47 ~ 64 weight of water Part.
4. a kind of preparation method of antibiotic plastic sheet material for liquid food packing, feature exist according to claim 1 In：In the step b, the mass concentration of silver nitrate solution is 60 ~ 70%, 75 ~ 80 parts by weight of silver nitrate solution, hydrazine hydrate 20 ~ 25 Parts by weight.
5. a kind of preparation method of antibiotic plastic sheet material for liquid food packing, feature exist according to claim 1 In：In the step b, the rotation speed of fan of sprayed deposit is 2000 ~ 2800r/min, and atomisation pressure is 1 ~ 1.5MPa, capacity of sprinkler For 1000 ~ 1400mL/min.
6. a kind of preparation method of antibiotic plastic sheet material for liquid food packing, feature exist according to claim 1 In：In the step c, printing layer is one kind in polyethylene layer, cast polypropylene layer or polyvinyl chloride layer.
7. a kind of preparation method of antibiotic plastic sheet material for liquid food packing, feature exist according to claim 1 In：In the step c, bonding resin layer is epoxy resin layer, layer of polyurethane, has in base silicone layer or polyimide layer extremely Few one kind.
8. a kind of preparation method of antibiotic plastic sheet material for liquid food packing, feature exist according to claim 1 In：In the step c, it is at least one of two layers of co-extrusion film of polyethylene black and white, polyethylene three-layer extrusion film to be protected from light hot sealing layer.
9. a kind of preparation method of antibiotic plastic sheet material for liquid food packing, feature exist according to claim 1 In：In the step c, the thickness of printing layer is 20 ~ 40 μm, and the thickness of bonding resin layer is 0.5 ~ 3 μm, antibacterial modified EVOH/ The thickness of aluminium foil mixed layer is 50 ~ 100 μm, and the thickness for being protected from light hot sealing layer is 5 ~ 20 μm.
10. a kind of antibiotic plastic sheet material for liquid food packing that any one of claim 1 ~ 9 the method is prepared.
CN201810378445.1A 2018-04-25 2018-04-25 A kind of antibiotic plastic sheet material and preparation method for liquid food packing Withdrawn CN108749241A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11926123B2 (en) 2019-05-17 2024-03-12 Mucell Extrusion, Llc Multi-layer polymer foam film for packaging applications and the method of making the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11926123B2 (en) 2019-05-17 2024-03-12 Mucell Extrusion, Llc Multi-layer polymer foam film for packaging applications and the method of making the same

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