CN109677072A - A kind of fit film of vacuum packaging and its cross-linking treatment method can be used for micro-wave oven - Google Patents
A kind of fit film of vacuum packaging and its cross-linking treatment method can be used for micro-wave oven Download PDFInfo
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- CN109677072A CN109677072A CN201910084124.5A CN201910084124A CN109677072A CN 109677072 A CN109677072 A CN 109677072A CN 201910084124 A CN201910084124 A CN 201910084124A CN 109677072 A CN109677072 A CN 109677072A
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Links
- 238000009461 vacuum packaging Methods 0.000 title claims abstract description 32
- 238000004132 cross linking Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000010410 layer Substances 0.000 claims abstract description 56
- 239000012790 adhesive layer Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 239000002344 surface layer Substances 0.000 claims abstract description 18
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 50
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 46
- -1 polyethylene, ethylene-vinyl acetate Polymers 0.000 claims description 26
- 229920001903 high density polyethylene Polymers 0.000 claims description 24
- 239000004700 high-density polyethylene Substances 0.000 claims description 24
- 239000004698 Polyethylene Substances 0.000 claims description 23
- 229920000573 polyethylene Polymers 0.000 claims description 20
- 239000012528 membrane Substances 0.000 claims description 15
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 9
- 150000008064 anhydrides Chemical class 0.000 claims description 9
- QYMGIIIPAFAFRX-UHFFFAOYSA-N butyl prop-2-enoate;ethene Chemical compound C=C.CCCCOC(=O)C=C QYMGIIIPAFAFRX-UHFFFAOYSA-N 0.000 claims description 9
- 229920006245 ethylene-butyl acrylate Polymers 0.000 claims description 9
- 229920006225 ethylene-methyl acrylate Polymers 0.000 claims description 8
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 229920006037 cross link polymer Polymers 0.000 claims description 5
- 229920000554 ionomer Polymers 0.000 claims description 3
- 235000013305 food Nutrition 0.000 abstract description 18
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 238000012856 packing Methods 0.000 abstract description 7
- 238000009466 skin packaging Methods 0.000 abstract description 7
- 241001232787 Epiphragma Species 0.000 abstract description 5
- 230000004888 barrier function Effects 0.000 abstract description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 28
- 239000004707 linear low-density polyethylene Substances 0.000 description 28
- 229920003182 Surlyn® Polymers 0.000 description 23
- 229920001684 low density polyethylene Polymers 0.000 description 10
- 239000004702 low-density polyethylene Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 6
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 238000009460 vacuum skin packaging Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- BFMKFCLXZSUVPI-UHFFFAOYSA-N ethyl but-3-enoate Chemical compound CCOC(=O)CC=C BFMKFCLXZSUVPI-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920008790 Amorphous Polyethylene terephthalate Polymers 0.000 description 1
- 229920003310 DuPont™ Surlyn® 1601-2 Polymers 0.000 description 1
- 229920003308 DuPont™ Surlyn® 1605 Polymers 0.000 description 1
- 229920003302 Optema™ Polymers 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005252 bulbus oculi Anatomy 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 235000013611 frozen food Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 239000012793 heat-sealing layer Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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
- B32B27/06—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
- B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
-
- 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
- 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
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (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
- B32B27/32—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
- 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
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/246—All polymers belonging to those covered by groups B32B27/32 and B32B27/30
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- 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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different 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
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
-
- 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
- B32B2307/724—Permeability to gases, adsorption
-
- 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
- B32B2307/726—Permeability to liquids, absorption
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
A kind of fit film of vacuum packaging and its cross-linking treatment method can be used for micro-wave oven, the fit film of the vacuum packaging includes the surface layer for successively stacking fitting, first structure layer, barrier layer, the second structure sheaf, hot sealing layer, it is equipped at least 1 layer of structure sheaf between the surface layer and the first adhesive layer, at least 1 layer of structure sheaf is equipped between second adhesive layer and hot sealing layer.Product of the present invention carries out skin packaging application as the tray that the epiphragma of skin packaging can be formed with sheet materials such as PET, PS, PVC, PP, entire package product can carry out microwave heating, skin packaging epiphragma can be separated with food after microwave heating, enough spaces are remained with above food, it is not infected with food, and easily removes packing film.
Description
Technical field
The invention belongs to pack technical field of membrane, and in particular to a kind of fit film of vacuum packaging that can be used for micro-wave oven and its
Cross-linking treatment method.
Background technique
Vacuum skin packaging (Vacuum Skin packaging, VSP) be placed in by the product of contracting for fixed output quotas dedicated plastic sheet or
On film, the fit film of covering product is set to heat and be close to product surface under vacuum action, and seal with counterdie.Through fit
The product of packaging, not only by it is good protection but also illustrate its natural form and appearance.
When being used for food packaging using VSP, has and be much difficult to the advantages of substituting: outstanding vacuum and fit close protection,
Make food that there is the longer shelf-life；There is no vacuum tunneling effect and liquid accumulation；Better presentation effect, can more attract
Eyeball；Reduce the freeze burn of frozen food；It can be used for packing soft content；Vertical display reduces spacial flex, convenient for matching
It send.
Vacuum skin packaging is protruded above due to having the advantages that, gets more and more applications at home in recent years, and
With the quickening pace of modern life, requirement of the young man for food cooking increasingly develops to facilitation, if food is using patch
Body packaging is sold, and purchase can be directly placed into micro-wave oven after going home and heat, and can directly be eaten after a few minutes, time saving
Laborsaving, current such application has existed, but vacuum skin packaging is the packaging for being close to food, and packet is removed after microwave heating
During dress, it is inevitably infected with the part of food, and food relatively scalds after heating, is close to the packaging of food not
It easily removes, brings many constant.
Summary of the invention
The purpose of the present invention is to provide a kind of fit film of vacuum packaging that can be used for micro-wave oven and its cross-linking treatment method,
The fit film of the vacuum packaging has good oxygen transmission rate, permeability rate, while being pasted using the fit film of the vacuum packaging with tray
Have when body packaging applications and easily opens effect.
In order to achieve the above objectives, the technical scheme is that
A kind of fit film of vacuum packaging can be used for micro-wave oven, including be successively bonded surface layer, the first adhesive layer, centre
Layer, the second adhesive layer, hot sealing layer.
Further, described in the fit membrane structure of vacuum packaging that can be used for micro-wave oven between surface layer and the first adhesive layer
Equipped at least 1 layer of structure sheaf, at least 1 layer of structure sheaf is equipped between second adhesive layer and hot sealing layer.
Preferably, described in the fit membrane structure of vacuum packaging that can be used for micro-wave oven between surface layer and the first adhesive layer
Equipped with 1 layer or 2 layers of structure sheaf, 1 layer or 2 layers of structure sheaf are equipped between second adhesive layer and hot sealing layer.
Preferably, the material on the surface layer is selected from polyethylene, ethylene-vinyl acetate copolymer (EVA), Ionomer
One or more of (Surlyn).
Preferably, the polyethylene is high density polyethylene (HDPE) (HDPE) or linear low density polyethylene (LLDPE) (LLDPE).
Preferably, the material of first adhesive layer, the second adhesive layer is selected from anhydride modified polyethylene, ethyl vinyl acetate
One of ethylene copolymer (EVA), ionic cross-linked polymer (Surlyn).
Preferably, the material of the middle layer is selected from ethylene-vinyl alcohol copolymer (EVOH), polyethylene, ionic crosslinking
Polymer (Surlyn), one or both of ethylene-vinyl acetate copolymer (EVA).Preferably, the polyethylene is highly dense
Spend polyethylene (HDPE) or linear low density polyethylene (LLDPE) (LLDPE).
Preferably, the material of the hot sealing layer is selected from: polyethylene, ethylene-vinyl acetate copolymer (EVA), ethylene-propylene
One or both of sour methyl terpolymer (EMA), ethylene butyl acrylate (EBA).It is furthermore preferred that the polyethylene is highly dense
Spend polyethylene (HDPE) or linear low density polyethylene (LLDPE) (LLDPE).
Preferably, the material of the structure sheaf is polyethylene, ionic cross-linked polymer (Surlyn), ethyl vinyl acetate second
One or more of alkene copolymer (EVA).It is furthermore preferred that the polyethylene is high density polyethylene (HDPE) (HDPE) or line style
Low density polyethylene (LDPE) (LLDPE).
In the fit membrane structure of vacuum packaging provided by the invention, the material and thickness of first adhesive layer, the second adhesive layer
Degree can be identical or not identical, the first structure layer, the second structure sheaf material and thickness can identical not yet
It is identical.
The fit Design of Membrane Structure of vacuum packaging provided by the invention is flexible, can be adapted for 5 layers, 7 layers, 9 layers or 11 layers and blows
The production of film machine, and can be designed as that there is high-barrier or the film without barriers function as requested.
In a preferred embodiment of the invention, the membrane structure of the fit film of vacuum packaging from outside to inside is selected from:
(HDPE+LLDPE)/Surlyn/EVOH/Surlyn/(EVA+LLDPE)；
(EVA+LLDPE)/EVA/EVA/EVA/(EVA+LLDPE)；
(EVA+LLDPE)/Surlyn/Surlyn/Surlyn/(EVA+LLDPE)；
(HDPE+LLDPE)/EVA/ anhydride modified polyethylene/EVOH/ anhydride modified polyethylene/EVA/ (EMA+
LLDPE)；
(HDPE+LLDPE)/Surlyn/Surlyn/Surlyn/Surlyn/Surlyn/(EBA+LLDPE)；
HDPE+LLDPE/EVA/Surlyn/ anhydride modified polyethylene/EVOH/ anhydride modified polyethylene/Surlyn/
EVA/(EVA+EMA)；
(EVA+LLDPE)/(EVA+LDPE)/(EVA+LDPE)/EVA/(EVA+LDPE)/EVA/(EVA+LDPE)/(EVA+
LDPE)/(EVA+EBA)；
(EVA+LLDPE)/(EVA+LDPE)/Surlyn/ anhydride modified polyethylene/EVOH/ anhydride modified polyethylene/
Surlyn/(EVA+LDPE)/(EVA+LLDPE)。
The preparation method of the vacuum packaging fit film provided by the invention that can be used for micro-wave oven is using food-grade raw material
The fit film of vacuum packaging is prepared by multi-layer co-extruded once through moulding technology in particle, and specifically comprising the following steps: will be various
Food grade plastic particle is weighed mixture automatically according to the dosage that above-mentioned formula is set, the good raw material of mixture by extruder plasticizing,
Then it is squeezed out by Multi-layer coextruding die head, is plasticized forms a film through supercooling later, then rolling, offline EB processing, be finally packaged into
Library, as vacuum packaging patch body membrane product.
Further, offline EB processing method (cross-linking treatment method) of the invention uses the side of continuous several times double treatment
Formula, specifically: the heat cover positioned at inner surface is handled using lower voltage, handles voltage in 70-100KV, treatment dosage exists
15-25Mrad；Treatment positioned at outer surface uses higher voltage, handles voltage in 170-200KV, treatment dosage exists
15-25Mrad。
Since EB crosslinking Treatment can reduce the heat seal strength of material, no matter traditional single side processing is from heat cover or surface layer face
Processing all has a certain disadvantage, and the intensity decline degree of heat cover is difficult to control to than more uniform range when from treatment.
From when sealing surface treatment, due to needing to guarantee that entire material is all handled, the voltage of processing needs relatively high, thus fit heat-sealing
The reduction of intensity is obvious.The present invention using two-sided crosslinking Treatment mode can accurately adjust can microwave patch body membrane product at
The heat seal strength of front and back is managed, the homogeneity of product fitting intensity is improved, while overcome that fit heat seal strength is substantially reduced lacks
Point.
Beneficial effects of the present invention:
Tensile strength >=14MPa of packing film prepared by the present invention, elongation at break >=300%, punctured resistance
It can reach 9N or more, while there is good oxygen transmission rate, permeability rate.
Epiphragma of the vacuum packaging note body membrane product as skin packaging provided by the invention, can be with PET, PS, PVC, PP etc.
The tray that sheet material is formed carries out skin packaging application, and entire package product can carry out microwave heating.
Due to hot sealing layer of the present invention special material design so that the epiphragma of vacuum skin packaging with PET, PS, PVC,
Have when the tray that the sheet materials such as PP are formed carries out skin packaging application and easily open effect, specifically, in microwave heating process, adds
Heat makes content generate vapor, the effect of gas so that surrounding heat-seal land under the action of vapour pressure can part disengage,
It is separated convenient for epiphragma and food, enough spaces is remained with above food, be not infected with food, and easily remove packing film.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the fit film of vacuum packaging of 1-3 of embodiment of the present invention preparation.
Fig. 2 is the structural schematic diagram of the fit film of vacuum packaging of 4-5 of embodiment of the present invention preparation.
Fig. 3 is the structural schematic diagram of the fit film of vacuum packaging of 6-8 of embodiment of the present invention preparation.
Specific embodiment
Below with reference to embodiment and attached drawing, the present invention will be further described.
In the present invention, the polyethylene includes high density polyethylene (HDPE) (HDPE), linear low density polyethylene (LLDPE) (LLDPE), institute
Stating high density polyethylene (HDPE) (HDPE) is the high thermoplastic polyethylene resin of crystallinity, can be selected from ExxonMobil company
HTA002.The linear low density polyethylene (LLDPE) (LLDPE) be under lower temperature and pressure, by ethylene and a alkene such as butylene, oneself
Alkene or octene copolymer are closed and are generated, and can be selected from the LLDPE of the SP series of PRIME company, such as SP1510, SP2520.
In the present invention, ethylene-vinyl acetate copolymer (EVA) density range is 1.17~1.25g/ml, it is desirable that second
Alkene content 44% is hereinafter, can be selected from the E283F of Hanwha Total.
In the present invention, the Ionomer (Surlyn) is the ethylene-methyl methacrylate being polymerize by high-pressure free radical
Copolymer is partly or entirely neutralized and a kind of manufactured copolymer, can be selected from Surlyn1605, manufacturer: E.I.Du Pont Company；
Surlyn 1601-2, manufacturer: E.I.Du Pont Company.
In the present invention, the anhydride modified polyethylene is the polyethylene with fine adhesive property, be can be selected from
The PX3734 of Lyondellbasell company.It is 29~44% that the ethylene-vinyl alcohol copolymer (EVOH), which is ethylene contents,
Copolymer can be selected from the J102B of Kuraray.
In the present invention, the ethylene-methyl acrylate copolymer (EMA) is the ethylene of methyl acrylate content 8~40%
Copolymer, 2~6g/10min of melt flow rate (MFR).Environmental stress crack resistance is good, and low temperature heat seal is good, can be selected from
ExxonMobil company Optema TC 110Blown.
In the present invention, it is 17% that the ethylene butyl acrylate (EBA), which is selected from Dupont company butyl acrylate content,
'sAC 3717。
Table 1 is that the structure of VSP film and material composition, table 2 are VSP in 1-8 of the embodiment of the present invention in 1-8 of the embodiment of the present invention
The quality proportioning of ingredient between each structure sheaf of film and in structure sheaf, table 3 are 1-8 of embodiment of the present invention machined parameters, and table 4 is this
The performance test results of the VSP film of inventive embodiments 1-8 preparation.
Embodiment 1-3 film successively includes surface layer 1, the first adhesive layer 2, middle layer 3, the second adhesive layer 4, heat-sealing from top to bottom
Layer 5, structure is as shown in Figure 1；Embodiment 4-6 film is that 1 layer of structure sheaf, the second adhesive layer are equipped between surface layer and the first adhesive layer
Between hot sealing layer be equipped with 1 structure sheaf, specifically from top to bottom successively include surface layer 1, the first adhesive layer 2, first structure layer 3, in
Interbed 4, the second adhesive layer 5, the second structure sheaf 6, hot sealing layer 7, structure is as shown in Figure 2；Embodiment 6-8 film is on surface layer and first
It is equipped with 2 layers of structure sheaf between adhesive layer, 2 structure sheafs are equipped between the second adhesive layer and hot sealing layer, are specifically successively wrapped from top to bottom
Include surface layer 1, the first adhesive layer 2, first structure layer 3, third structure sheaf 4, middle layer 5, the second adhesive layer 6, the second structure sheaf 7,
4th structure sheaf 8, hot sealing layer 9, structure are as shown in Figure 3.
In table 2 by taking embodiment 1 as an example, surface layer, the first adhesive layer, middle layer, the second adhesive layer, hot sealing layer in embodiment 1
Quality be respectively 10%, 26%, 8%, 26%, the 30% of VSP membrane material gross mass, wherein in skin-material HDPE with
The mass ratio of LLDPE is 20: 80, and the mass ratio for sealing EVA and LLDPE in layer material is 50: 50, the VSP film being prepared
80 μm of thickness.
Embodiment 1-8 uses food-grade raw material particle, is prepared by conventional multilayer co-extrusion once through moulding technology
Can microwave packing film, wherein the operating temperature of layers of material, surface layer/hot sealing layer processing voltage, treatment dosage are referring to table 3.
As shown in Table 4, tensile strength >=14MPa of packing film prepared by the present invention, elongation at break >=300%,
Punctured resistance can reach 9N or more, while have good oxygen transmission rate, permeability rate.Packing film prepared by the present invention with
The tray that the sheet materials such as PET, PS, PVC, PP are formed carries out skin packaging application, entire package product fit packet after microwave heating
Dress film is separated with food, and enough spaces are remained with above food, food is not infected with, easily removes.
Use EVA+LLDPE as hot sealing layer, such product and PE class joint filling material in embodiment 1-3 and embodiment 8
Box is dragged to be bonded excellent effect.Overcome pure PP, PS, APET, PVC etc. and PE class joint filling material drags box that cannot be bonded or be bonded effect
The bad technical problem of fruit.
The heat-sealing layer material that embodiment 4-6 is used uses the blend of EMA or EBA and HDPE, LLDPE or EVA, blending
The quality that ratio is generally EMA or EBA accounts for 50~100%, the quality 0~50% of HDPE, LLDPE or EVA.The ratio root of blending
Be adjusted according to the intensity of fitting, the ratio for reducing HDPE, LLDPE or EVA can increase VSP film strength, increase HDPE,
The ratio of LLDPE or EVA can reduce VSP film strength.Using the configuration mode of this hot sealing layer, so that VSP membrane material can be with
It is directly bonded with materials such as PET, PS, PVC, PP, and has the effect of easily opening.The intensity of fitting can be by weak to emphasizing simultaneously
It is whole.
Although the VSP film cost of EVA structure is low compared with Surlyn, the VSP membrane material of Surlyn structure sheaf it is strong
Degree and puncture-resistant intensity are higher, and embodiment 7-8 is replaced by the structure of the fit membrane material of change using EVA+LDPE
Surlyn redesigns the thickness of each layer, while so that material is had EVA structure economics, it may have the highly resistance of Surlyn is worn
Thorn feature.
Table 1
Table 2
Table 3
Table 4
Claims (10)
1. a kind of fit film of vacuum packaging that can be used for micro-wave oven, including be successively bonded surface layer, the first adhesive layer, middle layer,
Second adhesive layer, hot sealing layer.
2. the fit film of vacuum packaging according to claim 1, which is characterized in that the vacuum packaging that can be used for micro-wave oven
At least 1 layer of structure sheaf, second adhesive layer and hot sealing layer are equipped between surface layer described in fit membrane structure and the first adhesive layer
Between be equipped at least 1 layer of structure sheaf.
3. the fit film of vacuum packaging according to claim 1 or 2, which is characterized in that the vacuum that can be used for micro-wave oven
It packs and is equipped with 1 layer or 2 layers of structure sheaf between surface layer described in fit membrane structure and the first adhesive layer, second adhesive layer and heat
1 layer or 2 layers of structure sheaf are equipped between sealing.
4. the fit film of vacuum packaging according to claim 1-3, which is characterized in that the material on the surface layer is selected from
One or more of polyethylene, ethylene-vinyl acetate copolymer, Ionomer.
5. the fit film of vacuum packaging according to claim 1-3, which is characterized in that first adhesive layer, the
The material of two adhesive layers in anhydride modified polyethylene, ethylene-vinyl acetate copolymer, ionic cross-linked polymer one
Kind.
6. the fit film of vacuum packaging according to claim 1, which is characterized in that the material of the middle layer is selected from ethylene-
Ethenol copolymer, polyethylene, ionic cross-linked polymer, one or both of ethylene-vinyl acetate copolymer.
7. the fit film of vacuum packaging according to claim 1-3, which is characterized in that the material of the hot sealing layer selects
From: one of polyethylene, ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene butyl acrylate or
Two kinds.
8. the fit film of vacuum packaging according to claim 1-3, which is characterized in that the material of the structure sheaf is
Polyethylene, ionic cross-linked polymer, one or more of ethylene-vinyl acetate copolymer.
9. according to the described in any item fit films of vacuum packaging of claim 6-8, which is characterized in that the polyethylene is high density
Polyethylene or linear low density polyethylene (LLDPE).
10. such as the cross-linking treatment method of the described in any item fit films of vacuum packaging of claim 1-9, which is characterized in that described
Cross-linking treatment method by the way of double treatment, specifically: the heat cover that fit film is vacuum-packed is handled using low-voltage, place
Manage voltage 70-100KV, treatment dosage 15-25Mrad；The treatment that fit film is vacuum-packed is handled using high voltage, processing
Voltage 170-200KV, treatment dosage 15-25Mrad.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110370739A (en) * | 2019-08-07 | 2019-10-25 | 浙江金石包装有限公司 | A kind of packing film and preparation method thereof |
| CN112693199A (en) * | 2020-12-21 | 2021-04-23 | 张家港永和包装印务有限公司 | Easy cover film of packaging paper container and heat sealing layer thereof |
| CN117360024A (en) * | 2023-10-11 | 2024-01-09 | 安徽科欣新材料科技有限公司 | Polyethylene skin packaging film and preparation method thereof |
| CN117584585A (en) * | 2023-12-28 | 2024-02-23 | 黄山永新股份有限公司 | Medical outer packaging film and preparation method and application thereof |
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| CN107627701A (en) * | 2017-08-07 | 2018-01-26 | 江阴升辉包装材料有限公司 | A kind of vacuum skin packaging film and its cross-linking treatment method |
| CN109070557A (en) * | 2016-04-04 | 2018-12-21 | 克里奥瓦克公司 | Thermoplastic film for vacuum skin packaging, packaging method and application thereof |
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| CN109070557A (en) * | 2016-04-04 | 2018-12-21 | 克里奥瓦克公司 | Thermoplastic film for vacuum skin packaging, packaging method and application thereof |
| CN107627701A (en) * | 2017-08-07 | 2018-01-26 | 江阴升辉包装材料有限公司 | A kind of vacuum skin packaging film and its cross-linking treatment method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110370739A (en) * | 2019-08-07 | 2019-10-25 | 浙江金石包装有限公司 | A kind of packing film and preparation method thereof |
| CN112693199A (en) * | 2020-12-21 | 2021-04-23 | 张家港永和包装印务有限公司 | Easy cover film of packaging paper container and heat sealing layer thereof |
| CN112693199B (en) * | 2020-12-21 | 2023-08-01 | 张家港永和包装印务有限公司 | Easy cover film of packaging paper container and heat sealing layer thereof |
| CN117360024A (en) * | 2023-10-11 | 2024-01-09 | 安徽科欣新材料科技有限公司 | Polyethylene skin packaging film and preparation method thereof |
| CN117584585A (en) * | 2023-12-28 | 2024-02-23 | 黄山永新股份有限公司 | Medical outer packaging film and preparation method and application thereof |
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