CN110370739A - A kind of packing film and preparation method thereof - Google Patents
A kind of packing film and preparation method thereof Download PDFInfo
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- CN110370739A CN110370739A CN201910726610.2A CN201910726610A CN110370739A CN 110370739 A CN110370739 A CN 110370739A CN 201910726610 A CN201910726610 A CN 201910726610A CN 110370739 A CN110370739 A CN 110370739A
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- layer
- film
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- hot sealing
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- 238000012856 packing Methods 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000010410 layer Substances 0.000 claims abstract description 168
- 238000007639 printing Methods 0.000 claims abstract description 67
- 238000007789 sealing Methods 0.000 claims abstract description 53
- 239000012790 adhesive layer Substances 0.000 claims abstract description 19
- 238000004806 packaging method and process Methods 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims description 19
- 230000001070 adhesive effect Effects 0.000 claims description 19
- 150000001875 compounds Chemical class 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 11
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 11
- 239000005025 cast polypropylene Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 8
- 239000004814 polyurethane Substances 0.000 claims description 8
- 235000013305 food Nutrition 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000012785 packaging film Substances 0.000 abstract description 9
- 229920006280 packaging film Polymers 0.000 abstract description 9
- 239000003292 glue Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 238000009466 skin packaging Methods 0.000 description 7
- 235000015278 beef Nutrition 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009461 vacuum packaging Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000009460 vacuum skin packaging Methods 0.000 description 2
- 241001232787 Epiphragma Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000005911 diet Nutrition 0.000 description 1
- 230000000378 dietary effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- BFMKFCLXZSUVPI-UHFFFAOYSA-N ethyl but-3-enoate Chemical compound CCOC(=O)CC=C BFMKFCLXZSUVPI-UHFFFAOYSA-N 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000013622 meat product Nutrition 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000012940 solvent-free polyurethane adhesive Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 230000037303 wrinkles 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
- B32B27/06—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
- B32B27/10—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 paper or cardboard
-
- 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
- B32B27/32—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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- 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
- B32B38/14—Printing or colouring
- B32B38/145—Printing
-
- 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
- B32B7/06—Interconnection of layers permitting easy separation
-
- 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
- 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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/552—Fatigue strength
-
- 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
- B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D2565/38—Packaging materials of special type or form
- B65D2565/381—Details of packaging materials of special type or form
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to packaging film preparation technical fields, and in particular to a kind of packing film and preparation method thereof.The packing film successively includes upper film and lower film from top to bottom, and the lower film includes successively from top to bottom hot sealing layer, adhesive layer and printing layer, and the lower film further includes at least one layer of character pattern layer；The heat sealability of the packing film is good, and upper film and lower film can separate under conditions of low temperature, and commodity are easily removed, while not influence the appearance of packing film；And the tensile strength and elongation at break of the packaging film are preferable, are less prone to breakage, good airproof performance, the commodity in packaging film are not easy to be contaminated, and commodity easily take out, and client is facilitated to use, and attractive packages, customer experience is preferable.In addition, the packing film packs commodity packaging between upper film and hot sealing layer, and it is convenient and simple, reduce the dosage of film.
Description
Technical field
The invention belongs to packaging film preparation technical fields, and in particular to a kind of packing film and preparation method thereof.
Background technique
Aquatic products and fresh meat products are the important components of China's resident's dietary structure, have a vast market space
And commercial value, but need to carry out packing processes in actual shipment and process.
Existing manner of packing mainly has simple wrapping packaging, traditional vacuum packaging and controlled atmospheric packing.Wherein, simple wrapping
Fresh-keeping effect is poor, and usually monolith material wraps up in packet, and further material cutting, pallet packet need to be carried out at dealer by reaching
Dress, easily causes secondary pollution；Traditional vacuum packaging film is poor to the adaptability of material shape, and film is close to material and generates a large amount of pleats
Wrinkle, leads to the generation of capillary effect, oozes out material juice, increases loss；Controlled atmospheric packing can have protection well to make to yellowish pink
With, but the oxygen of excessive concentrations easily causes the growth of the microorganisms such as aerobic bacteria and the oxidative rancidity of unsaturated fatty acid,
Gas is more in packing simultaneously, easily causes surface water mist and anti-white phenomenon, reduces materials quality and attractive packages.Related scholar
It is proposed that food vacuum skin packaging concept and technology are come by improving existing vacuum-packed technique for the field packaging Problems
Corresponding deficiency, Shelf-life are made up, while more beautiful packaging effect being provided, adapts to the following fresh-keeping, efficient, beauty
Demand for development.
Skin packaging is that transparent plastic film is heated to softening degree, is then covered on the commodity for being lined with cardboard,
It is vacuumized from below, so that the plastic film heated and softened is adhered to its surface by the shape of commodity, while being also adhered to bearer
On the cardboard of product, become a kind of novel packaging object after cooling and shaping.Chinese patent literature CN109677072A, discloses one
The fit film of vacuum packaging that kind can be used for micro-wave oven, including be successively bonded surface layer, the first adhesive layer, middle layer, the second bonding
Layer and hot sealing layer；But the fit film of the vacuum packaging needs to carry out surface layer and hot sealing layer by the way of continuous several times double treatment
Processing, processing voltage are higher；In addition, when being packed to commodity, need to use two layers of fit film or as PET, PS, PVC,
The epiphragma of the skin packagings such as PP, materials are more in practical applications, and the vacuum skin packaging is easier to remove packet after microwave heating
Fill film.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming under cryogenic conditions in the prior art packing film not
Easily openable, commodity be not easily taken out and open packaging when easily cause packing film unsightly the defects of, to provide a kind of patch
Body packaging film and preparation method thereof.
For this purpose, the present invention provides following technical schemes；
The present invention provides a kind of packing films, from top to bottom successively include upper film and lower film；The lower film from up to
Under successively include hot sealing layer, adhesive layer and printing layer；The lower film further includes at least one layer of character pattern layer；The printing layer is extremely
It is few to be provided with character pattern layer on one side；
Wherein, the upper film is cast polypropylene layer, and the hot sealing layer is ethylene-vinyl acetate copolymer layer；Or,
The upper film is ethylene-vinyl acetate copolymer layer, and the hot sealing layer is cast polypropylene layer.
The hot sealing layer with a thickness of 20-80 μm；
The upper film with a thickness of 20-80 μm.
Further, in terms of every square metre, the quality of the printing layer is 300-500g；
The material of the printing layer is cardboard.
The adhesive layer is one-component solvent-free polyurethane adhesive layer；
The character pattern layer is water-based ink layer.
The present invention also provides a kind of preparation methods of above-mentioned packing film, including,
The intaglio printing water-based ink on printing layer forms character pattern layer after dry；
The printing layer and hot sealing layer by adhesive it is solvent-free it is compound after be bonded, obtained after curing it is described under
Film, it is spare；
The lower film and upper film form the packing film after heat sealing.
The solvent-free compound tense, it is 90-110 DEG C that adhesive, which enters solvent-free compound preceding temperature,；Glue conveying box (conveying institute
State adhesive) temperature be the temperature of the 85-95 DEG C of metering roll device of binder dosage (control) be 65-75 DEG C；Upper glue roller (is used
In coating adhesive) temperature be 75-85 DEG C.
The inking amount of the water-based ink is 0-5g/m2, but be not 0；
The coating weight of described adhesive is 3-6g/m2。
The speed of the intaglio printing is 100-200m/min, and the temperature of the drying is 70-100 DEG C.
The solvent-free compound speed is no more than 300m/min；
The binding temperature is 15-30 DEG C.
The temperature of the curing is 30-40 DEG C, and the curing time is not less than 48h；
The temperature of the heat sealing is 90-150 DEG C.
In addition, the present invention also provides the packing films that a kind of packing film or the above method are prepared
Application in food packaging.
Technical solution of the present invention has the advantages that
1. packing film provided by the invention, the packing film is described from top to bottom successively including upper film and lower film
Lower film includes successively from top to bottom hot sealing layer, adhesive layer and printing layer, and the lower film further includes at least one layer of character pattern layer；It should
Packing film is using cast polypropylene layer as upper film, and ethylene-vinyl acetate copolymer layer is as hot sealing layer or with ethyl vinyl acetate
Ethylene copolymer layer is as upper film, and method of the cast polypropylene as hot sealing layer, heat sealability is good and film and lower film can be made to exist
It can be separated under conditions of low temperature, commodity are easily removed, while not influencing the appearance of packing film；And the drawing of the packaging film
It stretches intensity and elongation at break is preferable, be less prone to breakage, good airproof performance, the commodity in packaging film are not easy to be contaminated, and commodity are easy
Taking-up, facilitates client to use, attractive packages, and customer experience is preferable.In addition, the packing film is by commodity packaging in upper film and heat
It is packed between sealing, it is convenient and simple, reduce the dosage of film.
2. packing film provided by the invention, by the thickness of thickness, upper film to hot sealing layer, printing layer dosage into
Row limits, and helps to improve heat sealability, easy taking off property and the safety of packing film.
Using monocomponent polyurethane as adhesive, when printing layer is bonded with hot sealing layer, the poly- ammonia of one-component solvent-free
Ester is cured with the vapor in air to react, and can make printing layer together with hot sealing layer secure fit, adhesiveness is strong, no
It is easily separated, and one-component solvent-free polyurethane has well adapting to property, oil resistivity and resistance to ag(e)ing；
Have the advantages that using water-based ink as character pattern layer environmental protection, it is nontoxic, meet the requirement of food packaging.
3. the preparation method of packing film provided by the invention, including the intaglio printing water-based ink on printing layer are done
Character pattern layer is formed after dry；The printing layer and hot sealing layer by adhesive carry out it is solvent-free it is compound after fitting, after curing
The lower film is obtained, it is spare；The lower film and upper film form the packing film after heat sealing；This method is simple, is not necessarily to
High temperature high pressure process is easily achieved, and the packing film heat sealability being prepared is good, upper lower film is easily separated；
Character pattern layer can be made accurate without obvious color difference, chromatography by controlling the print speed printing speed of intaglio printing,
The obtained ink on character pattern layer is uniform；
By controlling solvent-free complex parameter, the compound fastness (i.e. peel strength) of packing film is helped to improve, is dropped
Solvent residual amount in low packing film improves safety.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of packing film in the embodiment of the present invention 1；
Appended drawing reference is,
The upper film of 1-；2- hot sealing layer；3- adhesive layer；4- character pattern layer；5- printing layer；6- character pattern layer.
Specific embodiment
There is provided following embodiments is to preferably further understand the present invention, it is not limited to the best embodiment party
Formula is not construed as limiting the contents of the present invention and protection scope, anyone under the inspiration of the present invention or by the present invention and its
The feature of his prior art is combined and any and identical or similar product of the present invention for obtaining, all falls within of the invention
Within protection scope.
Specific experiment step or condition person are not specified in embodiment, according to the literature in the art described routine experiment
The operation of step or condition can carry out.Reagents or instruments used without specified manufacturer, being can be by commercially available acquisition
Conventional reagent product.
Embodiment 1
A kind of packing film is present embodiments provided, includes successively from top to bottom upper film 1 and lower film, lower film is from top to bottom
Include successively hot sealing layer 2, adhesive layer 3, character pattern layer 4, printing layer 5 and character pattern layer 6, sees Fig. 1；
Upper film is cast polypropylene layer, and hot sealing layer is ethylene-vinyl acetate copolymer layer, and adhesive layer is one-component solvent-free
Layer of polyurethane, printing layer are cardboard, and character pattern layer is water-based ink layer,
Hot sealing layer with a thickness of 50 μm；Upper film with a thickness of 50 μm；In terms of every square metre, the quality of the printing layer is
400g；
The present embodiment additionally provides a kind of preparation method of above-mentioned packing film, including,
With the print speed printing speed of 100m/min in the positive and negative two sides intaglio printing water-based ink of printing layer, the inking of printing layer unilateral side
Amount is 2g/m2, character pattern layer is formed after dry at 70 DEG C；
Printing layer and hot sealing layer by adhesive carry out it is solvent-free it is compound after fit together at 20 DEG C, passed through at 40 DEG C
Lower film is obtained after curing 54h, it is spare, wherein the coating weight of adhesive is 6g/m2, solvent-free compound speed is 200m/min；
The temperature of glue conveying box is 90 DEG C, and the temperature of metering roll is 70 DEG C, and the temperature of upper glue roller is 80 DEG C；
Upper film and lower film carry out heat-sealing effect at 90 DEG C, and beef is carried out skin packaging.
Embodiment 2
A kind of packing film is present embodiments provided, includes successively from top to bottom upper film 1 and lower film, lower film is from top to bottom
It successively include hot sealing layer 2, adhesive layer 3, character pattern layer 4, printing layer 5 and character pattern layer 6；
Upper film is cast polypropylene layer, and hot sealing layer is ethylene-vinyl acetate copolymer layer, and adhesive layer is one-component solvent-free
Layer of polyurethane, printing layer are cardboard, and character pattern layer is water-based ink layer,
Hot sealing layer with a thickness of 20 μm；Upper film with a thickness of 20 μm；In terms of every square metre, the quality of the printing layer is
500g；
The present embodiment additionally provides a kind of preparation method of above-mentioned packing film, including,
With the print speed printing speed of 200m/min in the positive and negative two sides intaglio printing water-based ink of printing layer, the inking of printing layer unilateral side
Amount is 5g/m2, character pattern layer is formed after dry at 100 DEG C；
Printing layer and hot sealing layer by adhesive carry out it is solvent-free it is compound after fit together at 15 DEG C, passed through at 30 DEG C
Lower film is obtained after curing 50h, it is spare, wherein the coating weight of adhesive is 5g/m2, solvent-free compound speed is 80m/min；
The temperature of glue conveying box is 90 DEG C, and the temperature of metering roll is 70 DEG C, and the temperature of upper glue roller is 80 DEG C；
Upper film and lower film carry out heat-sealing effect at 150 DEG C, and beef is carried out skin packaging.
Embodiment 3
A kind of packing film is present embodiments provided, includes successively from top to bottom upper film 1 and lower film, lower film is from top to bottom
It successively include hot sealing layer 2, adhesive layer 3, character pattern layer 4, printing layer 5 and character pattern layer 6；
Upper film is ethylene-vinyl acetate copolymer layer, and hot sealing layer is cast polypropylene layer, and adhesive layer is one-component solvent-free
Layer of polyurethane, printing layer are cardboard, and character pattern layer is water-based ink layer,
Hot sealing layer with a thickness of 80 μm；Upper film with a thickness of 80 μm；In terms of every square metre, the quality of the printing layer is
500g；
The present embodiment additionally provides a kind of preparation method of above-mentioned packing film, including,
With the print speed printing speed of 150m/min in the positive and negative two sides intaglio printing water-based ink of printing layer, the inking of printing layer unilateral side
Amount is 3g/m2, character pattern layer is formed after dry at 80 DEG C；
Printing layer and hot sealing layer by adhesive carry out it is solvent-free it is compound after fit together at 15 DEG C, passed through at 35 DEG C
Lower film is obtained after curing 49h, it is spare, wherein the coating weight of adhesive is 3g/m2, solvent-free compound speed is 20m/min；
The temperature of glue conveying box is 90 DEG C, and the temperature of metering roll is 70 DEG C, and the temperature of upper glue roller is 80 DEG C；
Upper film and lower film carry out heat-sealing effect at 120 DEG C, and beef is carried out skin packaging.
Embodiment 4
A kind of packing film is present embodiments provided, includes successively from top to bottom upper film and lower film, lower film is from top to bottom
It successively include hot sealing layer, adhesive layer, printing layer and character pattern layer；
Upper film is ethylene-vinyl acetate copolymer layer, and hot sealing layer is cast polypropylene layer, and adhesive layer is one-component solvent-free
Layer of polyurethane, printing layer are cardboard, and character pattern layer is water-based ink layer,
Hot sealing layer with a thickness of 50 μm；Upper film with a thickness of 50 μm；In terms of every square metre, the quality of the printing layer is
400g；
The present embodiment additionally provides a kind of preparation method of above-mentioned packing film, including,
With the print speed printing speed of 100m/min, intaglio printing water-based ink, the inking amount of printing layer are 2g/m on printing layer2,
Character pattern layer is formed after drying at 90 DEG C；
Printing layer and hot sealing layer by adhesive carry out it is solvent-free it is compound after fit together at 20 DEG C, passed through at 40 DEG C
Lower film is obtained after curing 54h, it is spare, wherein the coating weight of adhesive is 6g/m2, solvent-free compound speed is 200m/min；
The temperature of glue conveying box is 90 DEG C, and the temperature of metering roll is 70 DEG C, and the temperature of upper glue roller is 80 DEG C；
Upper film and lower film carry out heat-sealing effect at 100 DEG C, and beef is carried out skin packaging.
Comparative example 1
This comparative example provides a kind of packing film, includes successively from top to bottom upper film and lower film, lower film is from top to bottom
It successively include hot sealing layer, adhesive layer, character pattern layer, printing layer and character pattern layer；
Upper film is ethylene-vinyl acetate copolymer layer, and hot sealing layer is ethylene-vinyl acetate copolymer layer, and adhesive layer is single
Component solvent-free polyurethane layer, printing layer are cardboard, and character pattern layer is water-based ink layer,
Hot sealing layer with a thickness of 20 μm；Upper film with a thickness of 20 μm；In terms of every square metre, the quality of the printing layer is
500g；
The present embodiment additionally provides a kind of preparation method of above-mentioned packing film, including,
With the print speed printing speed of 200m/min in the positive and negative two sides intaglio printing water-based ink of printing layer, the inking of printing layer unilateral side
Amount is 5g/m2, character pattern layer is formed after dry at 100 DEG C；
Printing layer and hot sealing layer by adhesive carry out it is solvent-free it is compound after fit together at 15 DEG C, passed through at 30 DEG C
Lower film is obtained after curing 50h, it is spare, wherein the coating weight of adhesive is 5g/m2, solvent-free compound speed is 80m/min；
The temperature of glue conveying box is 90 DEG C, and the temperature of metering roll is 70 DEG C, and the temperature of upper glue roller is 80 DEG C；
Upper film and lower film carry out heat-sealing effect at 150 DEG C, and beef is carried out skin packaging.
Test example
The performance test methods for the packing film that this test example provides embodiment 1-4 and comparative example 1 obtains and test
As a result, test method is as follows, test result is shown in Table 1；
The test method of the tensile property of packing film: GB/T 1040.3-2006；
The test method of the transparency of film on packing film are as follows: GB/T 2410-2008；
The performance test results of packing film and upper film that 1 embodiment 1-4 of table and comparative example 1 obtain
As can be seen from the table, film and lower film can divide under conditions of low temperature on packing film provided by the invention
From commodity are easily removed, and the tensile strength of the packaging film and elongation at break are preferable.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of packing film, which is characterized in that from top to bottom successively include upper film and lower film；The lower film from top to bottom according to
Secondary includes hot sealing layer, adhesive layer and printing layer；The lower film further includes at least one layer of character pattern layer；The printing layer at least one
Face is provided with character pattern layer；
Wherein, the upper film is cast polypropylene layer, and the hot sealing layer is ethylene-vinyl acetate copolymer layer；Or,
The upper film is ethylene-vinyl acetate copolymer layer, and the hot sealing layer is cast polypropylene layer.
2. packing film according to claim 1, which is characterized in that the hot sealing layer with a thickness of 20-80 μm；
The upper film with a thickness of 20-80 μm.
3. packing film according to claim 1 or 2, which is characterized in that in terms of every square metre, the matter of the printing layer
Amount is 300-500g；
The material of the printing layer is cardboard.
4. packing film according to claim 1-3, which is characterized in that the adhesive layer is one-component without molten
Agent polyurethane adhesive layer；
The character pattern layer is water-based ink layer.
5. a kind of preparation method of the described in any item packing films of claim 1-4, which is characterized in that including,
The intaglio printing water-based ink on printing layer forms character pattern layer after dry；
The printing layer and hot sealing layer by adhesive it is solvent-free it is compound after be bonded, the lower film is obtained after curing, it is standby
With；
The lower film and upper film form the packing film after heat sealing.
6. preparation method according to claim 5, which is characterized in that the inking amount of the water-based ink is 0-5g/m2, but
It is not 0；
The coating weight of described adhesive is 3-6g/m2。
7. preparation method according to claim 5 or 6, which is characterized in that the speed of the intaglio printing is 100-200m/
Min, the temperature of the drying are 70-100 DEG C.
8. according to the described in any item preparation methods of claim 5-7, which is characterized in that the solvent-free compound speed does not surpass
Cross 300m/min；
The binding temperature is 15-30 DEG C.
9. according to the described in any item preparation methods of claim 5-8, which is characterized in that the temperature of the curing is 30-40 DEG C,
The curing time is not less than 48h；
The temperature of the heat sealing is 90-150 DEG C.
10. any one of a kind of described in any item packing films of claim 1-4 or claim 5-9 the method is prepared into
To application of the packing film in food packaging.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111331979A (en) * | 2020-04-10 | 2020-06-26 | 向晓伟 | UV digital jet printing process of EVA film and EVA film product |
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Application publication date: 20191025 |