CN113043688A - High-barrier cooking skin stretching environment-friendly composite film and composite method and device thereof - Google Patents
High-barrier cooking skin stretching environment-friendly composite film and composite method and device thereof Download PDFInfo
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- CN113043688A CN113043688A CN202010663748.5A CN202010663748A CN113043688A CN 113043688 A CN113043688 A CN 113043688A CN 202010663748 A CN202010663748 A CN 202010663748A CN 113043688 A CN113043688 A CN 113043688A
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- 238000000034 method Methods 0.000 title claims description 37
- 238000013329 compounding Methods 0.000 claims abstract description 80
- 239000010410 layer Substances 0.000 claims abstract description 62
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims abstract description 56
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- -1 polypropylene Polymers 0.000 claims abstract description 51
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
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Images
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/0081—After-treatment of articles without altering their shape; Apparatus therefor using an electric field, e.g. for electrostatic charging
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- 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
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- 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
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- 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
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- 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
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- 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
- B32B37/1284—Application of adhesive
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- 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
Abstract
The invention discloses a high-barrier cooking skin stretching and drawing environment-friendly composite film, which has the structure that a first one-way stretching polypropylene film layer, a polyurethane adhesive layer, a solvent-free online corona layer, a polyvinylidene chloride film layer, a solvent-free online corona layer, a polyurethane adhesive layer and a second one-way stretching polypropylene film layer are sequentially arranged, the thickness of the composite film after the two layers of one-way stretching polypropylene films, the polyvinylidene chloride films subjected to solvent-free online corona treatment twice and the two layers of polyurethane adhesives are compounded can reach 120-plus 160 mu m, and the composite film has high barrier property to oxygen and water vapor and high-temperature cooking resistance; through twice online corona treatment on the polyvinylidene chloride film during solvent-free compounding, the compounding performance of the polyvinylidene chloride film is improved, the compounding strength is greatly improved, and the steamed and cooked product is ensured not to be damaged; meanwhile, the first unidirectional stretching polypropylene film and the second unidirectional stretching polypropylene film are improved, so that the product is well stretched in a body-fitting manner, wraps and displays the product, and the energy-saving, environment-friendly and safe effects are achieved.
Description
Technical Field
The invention belongs to the technical field of composite membranes for flexible packaging, and particularly relates to a high-barrier high-temperature-resistant steaming composite membrane and a compounding method thereof.
Background
At present, materials which have high barrier property and high temperature cooking resistance and can be subjected to skin stretching in the plastic flexible package market are mostly prepared by directly adopting multilayer coextrusion equipment, such as nylon 5 layers or 7 layers of coextrusion films; the high-barrier material co-extruded films such as PVDC, EVOH and the like are mainly used for aseptic packaging, hot cans, cooking bags, milk products, meat, fruit juice cans, seasonings and the like in the food industry, and the main equipment for producing the multi-layer co-extruded high-barrier films is Germany, Italy, Canada, Japan and the like, so that the co-extrusion production line has huge equipment investment, compared with a printing factory without multi-layer co-extrusion equipment, the film is very difficult to purchase, long in period and high in cost price, and cannot flexibly adapt to market demands and various changes, therefore, the multi-layer material and the high-barrier material can be processed into a ring through a special process to form the high-barrier high-temperature-resistant cooking paste stretching composite film, which is a new technology and means for developing high-end products in the food packaging industry.
In addition, in the soft package industry, the high-temperature steaming composite film is mostly dry-compounded, and the dry compounding method in the prior art is as follows: unreeling → coating the adhesive diluted by the organic solvent → drying the organic solvent → hot pressing and compounding → cooling → rolling, the composite film produced immediately has small initial adhesion and low peeling strength, and a large amount of organic solvent separates two adjacent layers of films when volatilizing to generate the layering phenomenon, so the composite effect cannot be achieved, therefore, the organic solvent needs to be removed immediately after the films are evenly coated with the adhesive; although the composite device in the production process is generally provided with a plurality of drying devices to accelerate the volatilization of the organic solvent, the organic solvent is thrown away and enters the atmosphere to cause certain pollution to the environment, and the organic solvent is difficult to volatilize thoroughly, so that the residue of the organic solvent has certain harm to the human body, and the composite device is large in energy consumption, high in material cost, low in production efficiency and particularly not beneficial to environmental protection. Therefore, the solvent-free compounding can well solve the problems, but the particularity of the high-barrier polyvinylidene chloride film in the processing process is as follows: 1. only one side can be corona; 2. the corona attenuation of the substrate film is fast; 3. the performance of the substrate film is stable after the substrate film is cured for 15 days, so the interlaminar composite strength of the solvent-free composite film is lower due to the characteristics of the high-barrier polyvinylidene chloride film, the interlaminar composite strength is only 0.6-0.8N/15mm, and the damage ratio of a high-temperature steamed product is serious under the composite strength.
Disclosure of Invention
The invention aims to provide a high-barrier cooking skin stretching environment-friendly composite film, the composite film package is a green environment-friendly packaging film through solvent-free compounding without solvent residue and emission, and the composite film has skin stretching and high-barrier high-temperature cooking resistance, so that the product has a good fresh-keeping effect.
The invention also aims to provide a compounding method of the high-barrier cooking skin stretching environment-friendly composite film, which solves the problems of complex process, insufficient environment protection, environmental pollution, unsafe use, higher cost, no energy conservation and the like in the prior art.
The invention further aims to provide a device for a compounding method of the high-barrier cooking skin stretching environment-friendly composite film, which solves the problems of complex structure, unstable product performance and the like in the prior art.
In order to achieve the purpose, the technical scheme is that the high-barrier cooking skin stretching environment-friendly composite film is characterized in that a first one-way stretching polypropylene film layer, a polyurethane adhesive layer, a solvent-free online corona layer, a polyvinylidene chloride film layer, a solvent-free online corona layer, a polyurethane adhesive layer and a second one-way stretching polypropylene film layer are sequentially arranged from outside to inside, and the thickness of the composite film obtained by carrying out two-time online corona treatment on two surfaces of the polyvinylidene chloride film through two layers of the one-way stretching polypropylene film, the polyvinylidene chloride film and the polyurethane adhesive can reach 120 plus 160 microns.
Preferably, the first uniaxially stretched polypropylene film layer of the composite film is a film with high temperature resistance and heat sealing performance, the thickness of the film is 50-60um, and the film enables the composite film to achieve good sealing flatness and good product appearance flatness.
Preferably, the second uniaxially stretched polypropylene film layer of the composite film is a film with low-temperature heat sealing performance, the thickness of the film is 50-60um, and the film enables the composite film to achieve good sealing fastness and stretch-pull body-fitting performance.
Preferably, the polyurethane adhesive layer of the composite film is a two-component polyurethane adhesive with no solvent and 100% solid content, and the composite thickness is 2.5-3.5 um.
Preferably, the polyvinylidene chloride film of the composite film is a high-barrier substrate film with the thickness of 20-30um, so that the oxygen transmission capacity of the composite film is less than or equal to 23cm3/m224h.at, the water vapor transmission is less than or equal to 3.0gm2.24h。
The compounding method of the high-barrier cooking skin stretching environment-friendly composite film comprises the following steps:
step one, adopting a solvent-free compounding procedure to coat a polyurethane laminating agent on the inner layer of a first unidirectional stretching polypropylene film, and then carrying out first compounding on the polyurethane laminating agent and a high-barrier polyvinylidene chloride film subjected to first online corona treatment to obtain a first composite film; the first online corona treatment is carried out on the non-corona surface of the polyvinylidene chloride film by an online corona machine additionally arranged on the solvent-free compounding equipment while the solvent-free compounding process is carried out;
step two, after a solvent-free compounding procedure is adopted to coat a polyurethane laminating agent on the inner layer of the second one-way stretching polypropylene film, the second compounding is carried out on the polyurethane laminating agent and the high-barrier polyvinylidene chloride film of the primary composite film in the step one after the second online corona treatment, and the secondary composite film is called; and the second online corona treatment is carried out in a solvent-free compounding process, and simultaneously, the second online corona treatment is carried out on the corona surface of the high-barrier polyvinylidene chloride film of the primary composite film in the step one through an online corona machine additionally arranged on solvent-free compounding equipment.
Preferably, the degree of polarization of two sides of the polyvinylidene chloride is greatly improved through two times of online corona treatment, the peel strength after the polyvinylidene chloride is compounded with two layers of unidirectional stretching polypropylene films is greatly improved, and the peel strength is improved from 0.6-0.8N/15mm to 1.8-2.5N/15 mm.
Preferably, the secondary composite film obtained after two times of solvent-free online corona compounding has good high-barrier performance and 121 ℃ high-temperature cooking resistance, and has good skin stretching performance and product appearance smoothness.
Preferably, a solvent-free compounding procedure is adopted to compound two layers of the unidirectional stretching polypropylene film, two times of solvent-free online corona-treated polyvinylidene chloride films and two layers of polyurethane adhesives to obtain the composite film, and no organic solvent and no environmental pollution are generated in the production process.
A device for a compounding method of a high-barrier cooking skin stretching and drawing environment-friendly composite film comprises a first unwinding device, a gluing device, a second unwinding device, a thermal compounding device, a cooling device and a winding device, and is characterized in that: also comprises a corona device;
the first unwinding device is used for winding the unidirectional stretching polypropylene film;
the first unwinding device is connected with the gluing compression roller and the rubber transmission roller sequentially through a guide roller, a tension roller and an auxiliary guide roller;
the second unwinding device is used for winding the polyvinylidene chloride film or the primary composite film, and is connected with the corona device sequentially through the guide roller and the tension roller;
the thermal compounding device is used for heating and compounding the unidirectional stretching polypropylene film and the polyvinylidene chloride film or the primary composite film, and is respectively connected with the gluing device and the corona device through a plurality of guide rollers;
the cooling device is used for cooling the composite membrane passing through the thermal compounding device;
the winding device is used for winding the primary composite film or the secondary composite film;
first unwinding device, rubber coating device, second unwinding device, corona unit, hot set composite, cooling device, coiling mechanism and a plurality of roller are all installed in the frame, first unwinding device, rubber coating device, second unwinding device, corona unit, hot set composite, cooling device, coiling mechanism all are connected with the motor, and the motor is connected with PLC control system.
Preferably, corona unit includes support, a plurality of guide roll, corona roller and guide roll's both ends are connected with the support respectively, and corona roller's top is equipped with corona generating device, and corona generating device's lower part is the corona chamber, and corona chamber's bottom is equipped with the electrode bar, and corona chamber's top is equipped with exhaust duct, and the electrode bar is connected with the high voltage discharge device electricity.
Preferably, the electrode rod in the corona chamber is one or more, and the length of the electrode rod is equal to or slightly less than that of the corona roller.
The invention has the beneficial effects that:
compared with the prior art, the composite film has the structure that a first one-way stretching polypropylene film layer, a polyurethane adhesive layer, a solvent-free online corona layer, a polyvinylidene chloride film layer, a solvent-free online corona layer, a polyurethane adhesive layer and a second one-way stretching polypropylene film layer are sequentially arranged, the thickness of the composite film obtained by compounding the two one-way stretching polypropylene films, the polyvinylidene chloride films subjected to twice solvent-free online corona treatments and the two polyurethane adhesives can reach 120-160 mu m, and the composite film has high barrier property to oxygen and water vapor and high-temperature steaming resistance;
meanwhile, through twice online corona treatment on the polyvinylidene chloride film during solvent-free compounding, the compounding performance of the polyvinylidene chloride film is improved, the compounding strength is greatly improved, and the steamed and cooked product is ensured not to be damaged; meanwhile, the first unidirectional stretching polypropylene film and the second unidirectional stretching polypropylene film are improved, so that the product can be well stretched in a body-fitting manner, can wrap and display the product, and is energy-saving, environment-friendly and safe;
in addition, the composite process method of the composite membrane is simple and mature, environment-friendly and energy-saving, safe in production and use, low in production cost and high in production efficiency, and does not need high-cost import equipment;
in addition, the device can superpose the corona for many times under the condition of not changing the corona power, thereby increasing the strength of the corona; through the corona chamber and the exhaust duct above the corona roller, heat and peculiar smell generated in the corona process can be directly discharged into a production workshop, and personal safety of operators is protected more effectively.
Description of the drawings:
FIG. 1 is a schematic structural view of one embodiment of a composite membrane of the present invention;
FIG. 2 is a flow chart of one embodiment of a method for compounding the composite membrane of the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of the composite device of the present invention;
figure 4 is a schematic structural view of one embodiment of a corona device of the present invention;
in the figure, 101-a first uniaxially stretched polypropylene film layer; 102-a polyurethane adhesive layer; 103-solvent free in-line corona layer; 104-a polyvinylidene chloride film layer; 105-a second uniaxially stretched polypropylene film layer;
1-a first unreeling device, 2-a reeling device, 3-a second unreeling device, 4-a corona device, 5-a thermal compounding device, 6-a cooling device, 7-a rubber transfer roller, 8-a rubber coating press roller, 9-a guide roller, 10-a tension roller and 11-an auxiliary guide roller;
41-bracket, 42-corona roller, 43-electrode bar, 44-corona chamber, 45-exhaust duct, 46-first guide roller.
Detailed Description
The invention will be further explained with reference to specific embodiments, without however limiting the invention thereto, and within the knowledge of a person skilled in the art, numerous variations can be made without departing from the spirit of the invention.
Certain features that are well known to those skilled in the art have been omitted from the following description for the sake of simplicity.
As shown in figure 1, the high-barrier cooking skin stretching environment-friendly composite film is characterized in that a first one-way stretching polypropylene film layer 101, a polyurethane adhesive layer 102, a solvent-free online corona layer 103, a polyvinylidene chloride film layer 104, a solvent-free online corona layer 103, a polyurethane adhesive layer 102 and a second one-way stretching polypropylene film layer 105 are sequentially arranged from outside to inside, and the composite film obtained by compounding two one-way stretching polypropylene films, two solvent-free online corona treated polyvinylidene chloride films and two polyurethane adhesives has the thickness of 120-160 mu m.
The first one-way stretching polypropylene film layer 101 of the composite film is a film with high-temperature-resistant and heat-sealing performance, the thickness of the film is 50-60 microns, and the film enables the composite film to achieve good sealing flatness and good product appearance flatness.
The second one-way stretching polypropylene film layer 105 of the composite film is a film with low-temperature heat sealing performance, the thickness of the film is 50-60 mu m, and the film enables the composite film to achieve good sealing fastness and stretching and pasting performance.
The polyurethane adhesive layer 102 of the composite film is a two-component polyurethane adhesive with no solvent and 100% solid content, and the composite thickness is 2.5-3.5 um.
The polyvinylidene chloride film layer 104 of the composite film is a high-barrier substrate film with the thickness of 20-30um, so that the oxygen transmission capacity of the composite film is less than or equal to 23cm3/m2At 24h, water vapor permeationExcess is less than or equal to 3.0gm2.24h。
As shown in fig. 2, a method for compounding a high-barrier cooking skin stretching environment-friendly composite film comprises the following steps:
step one, adopting a solvent-free compounding procedure to coat a polyurethane laminating agent on the inner layer of a first unidirectional stretching polypropylene film, and then carrying out first compounding on the polyurethane laminating agent and a high-barrier polyvinylidene chloride film subjected to first online corona treatment to obtain a first composite film; the first online corona treatment is carried out on the non-corona surface of the polyvinylidene chloride by an online corona machine additionally arranged on the solvent-free compounding equipment while the solvent-free compounding process is carried out;
step two, after a solvent-free compounding procedure is adopted to coat a polyurethane laminating agent on the inner layer of the second one-way stretching polypropylene film, the second compounding is carried out on the polyurethane laminating agent and the high-barrier polyvinylidene chloride film of the primary composite film in the step one after the second online corona treatment, and the secondary composite film is called; the second online corona treatment is carried out in a solvent-free compounding process, and simultaneously, the second online corona treatment is carried out on the corona surface of the high-barrier polyvinylidene chloride film of the primary composite film in the step one through an online corona machine additionally arranged on solvent-free compounding equipment, and the corona surface treatment is to enhance the polarity of the compounding surface and improve the compounding strength because the corona of the polyvinylidene chloride film is easy to attenuate; the degree of polarization of both sides of the polyvinylidene chloride is greatly improved by two times of online corona treatment, and the peel strength after the polyvinylidene chloride is compounded with two layers of unidirectional stretching polypropylene films is greatly improved from 0.6-0.8N/15mm to 1.8-2.5N/15 mm.
The invention adopts a solvent-free compounding procedure to compound two layers of one-way stretching polypropylene film, polyvinylidene chloride film and polyurethane adhesive by two times of solvent-free online corona, and the two-time compound film has good high barrier property and 121 ℃ high temperature cooking resistance, and has better body stretching property and product appearance smoothness.
The invention adopts a solvent-free compounding procedure to compound two layers of the unidirectional stretching polypropylene film, two times of solvent-free online corona treatment polyvinylidene chloride films and two layers of polyurethane adhesives to obtain the composite film, and the production process has no organic solvent, thereby being safe, environment-friendly and energy-saving.
As shown in fig. 3, a device for a method for compounding a high-barrier cooking skin-stretched environment-friendly composite film, the device comprises a first unwinding device (1), a gluing device, a second unwinding device (3), a thermal compounding device (5), a cooling device (6) and a winding device (2), and is characterized in that: further comprising a corona device (4);
the first unwinding device (1) is used for winding the unidirectional stretching polypropylene film;
the glue spreading device comprises a glue spreading compression roller (8) and a glue transmission roller (7), and the first unreeling device (1) is connected with the glue spreading compression roller (8) and the glue transmission roller (7) sequentially through a guide roller (9), a tension roller (10) and an auxiliary guide roller (11);
the second unwinding device (3) is used for winding a polyvinylidene chloride film or a primary composite film, and the second unwinding device (3) is connected with the corona device (4) sequentially through a guide roller (9) and a tension roller (10);
the thermal compounding device (5) is used for heating and compounding the unidirectional stretching polypropylene film and the polyvinylidene chloride film or the primary composite film, and the thermal compounding device (5) is respectively connected with the gluing device and the corona device (4) through a plurality of guide rollers (9);
the cooling device (6) is used for cooling the composite membrane passing through the thermal compounding device (5);
the winding device (2) is used for winding the primary composite film or the secondary composite film;
the automatic winding and unwinding device is characterized in that the first unwinding device (1), the gluing device, the second unwinding device (3), the corona device (4), the thermal compounding device (5), the cooling device (6), the winding device (2) and the rollers are all installed on the frame, the first unwinding device (1), the gluing device, the second unwinding device (3), the corona device (4), the thermal compounding device (5), the cooling device (6) and the winding device (2) are all connected with a motor, and the motor is connected with the PLC control system.
Corona unit (4) are including support (41), a plurality of guide roll (46), corona roller (42), the both ends of corona roller (42) and guide roll (46) are connected with the support respectively, and the top of corona roller (42) is equipped with corona generator, and corona generator's lower part is corona chamber (44), and the bottom of corona chamber (44) is equipped with electrode bar (43), and the top of corona chamber is equipped with exhaust duct (45), and electrode bar (43) are connected with the high voltage discharge device electricity.
The electrode rod (43) in the corona chamber (44) is one or more, and the length of the electrode rod (43) is equal to or slightly less than that of the corona roller (42).
In the actual production process, firstly, a first unidirectional stretching polypropylene film is wound on a first unwinding device, a polyvinylidene chloride film is wound on a second unwinding device, the first unidirectional stretching polypropylene film is coated with a two-component polyurethane adhesive without solvent and with the solid content of 100 percent through a coating press roller and a rubber transfer roller, the thickness of the coating is 2.5-3.5 mu m, then the mixed solution is conveyed to a thermal compounding device through a guide wheel, a non-corona layer of a polyvinylidene chloride film on a second unreeling device is input into a corona device through a guide roller and a tension roller to carry out primary online corona treatment while a solvent-free compounding process is carried out, the polyvinylidene chloride film after the corona treatment and a first one-way stretching polypropylene film coated with a polyurethane adhesive simultaneously enter the thermal compounding device to carry out primary compounding treatment, the mixed solution is called a primary composite film, and the primary composite film is reeled up by a reeling device after passing through a cooling device and then is taken down for later use;
secondly, a second unidirectional stretching polypropylene film is wound on the first unwinding device, a primary composite film is wound on the second unwinding device, the second unidirectional stretching polypropylene film is coated with a two-component polyurethane adhesive with 100 percent of solid content and no solvent through a coating pressing roller and a rubber transmission roller, the thickness of the coating is 2.5-3.5 mu m, then the polyvinylidene chloride film of the primary composite film on the second unreeling device is conveyed to a thermal compounding device through a guide wheel, a corona layer of the polyvinylidene chloride film is conveyed to the corona device through a guide roller and a tension roller to be subjected to secondary online corona treatment again while the solvent-free compounding process is carried out, the polyvinylidene chloride film subjected to the corona treatment and a second one-way stretching polypropylene film coated with polyurethane adhesive enter the thermal compounding device simultaneously to be subjected to secondary compounding treatment, the composite film is called a secondary composite film, and the secondary composite film is coiled by a coiling device after passing through a cooling device and then is subjected to post-treatment to obtain a finished product.
In conclusion, the invention provides a high-barrier cooking skin stretching environment-friendly composite film which is prepared through scientific research and multiple tests in application and use.
Attached physical index table
| Heat seal strength | ≥40N |
| Breaking force | ≥40N |
| Elongation at break | ≥35％ |
| Pendulum mass impact energy | ≥0.6J |
| Oxygen permeability | ≤23cm3/m2.24h.at |
| Water vapor permeability | ≤3.0g/m2.24h |
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a high resistant separates environment-friendly complex film that stretches out and draws of skin of cooking which characterized in that: the composite film is characterized in that a first one-way stretching polypropylene film layer (101), a polyurethane adhesive layer (102), a solvent-free online corona layer (103), a polyvinylidene chloride film layer (104), a solvent-free online corona layer (103), a polyurethane adhesive layer (102) and a second one-way stretching polypropylene film layer (105) are arranged from outside to inside in sequence, and the thickness of the composite film obtained by compounding the two one-way stretching polypropylene films, the polyvinylidene chloride films subjected to twice solvent-free online corona treatment and the two polyurethane adhesives can reach 120-160 mu m.
2. The composite film of claim 1, wherein: the first one-way stretching polypropylene film layer (101) is a film with high temperature resistance and heat sealing performance, the thickness of the film is 50-60 mu m, and the film enables the composite film to achieve good sealing flatness and good product appearance flatness.
3. The composite film of claim 1, wherein: the second one-way stretching polypropylene film layer (105) is a film with low-temperature heat sealing performance, the thickness of the film is 50-60 mu m, and the film enables the composite film to achieve good sealing fastness and stretching and pasting performance.
4. The composite film of claim 1, wherein: the polyurethane adhesive layer (102) is a two-component polyurethane adhesive with no solvent and 100% solid content, and the composite thickness is 2.5-3.5 um.
5. The composite film of claim 1, wherein: the polyvinylidene chloride film layer (104) is a high-barrier substrate film with the thickness of 20-30um, so that the oxygen transmission capacity of the composite film is less than or equal to 23cm3/m224h.at, the water vapor transmission is less than or equal to 3.0gm2.24h。
6. The compounding method of the high-barrier cooking skin stretching environment-friendly composite film as claimed in claim 1, characterized in that: the method comprises the following steps:
step one, adopting a solvent-free compounding procedure to coat a polyurethane laminating agent on the inner layer of a first unidirectional stretching polypropylene film, and then carrying out first compounding on the polyurethane laminating agent and a high-barrier polyvinylidene chloride film subjected to first online corona treatment to obtain a first composite film; the first online corona treatment is carried out on the non-corona surface of the polyvinylidene chloride by an online corona machine additionally arranged on the solvent-free compounding equipment while the solvent-free compounding process is carried out;
step two, after a solvent-free compounding procedure is adopted to coat a polyurethane laminating agent on the inner layer of the second one-way stretching polypropylene film, the second compounding is carried out on the polyurethane laminating agent and the high-barrier polyvinylidene chloride film of the primary composite film in the step one after the second online corona treatment, and the secondary composite film is called; and the second online corona treatment is carried out on the corona surface of the high-barrier polyvinylidene chloride film of the primary composite film in the step one through an online corona machine additionally arranged on solvent-free composite equipment while the solvent-free composite process is carried out.
7. Compounding method according to claim 6, characterized in that: the degree of polarization of two sides of the polyvinylidene chloride is greatly improved by two times of online corona treatment, the peel strength after the polyvinylidene chloride is compounded with two layers of unidirectional stretching polypropylene films is greatly improved, and the peel strength is improved from 0.6-0.8N/15mm to 1.8-2.5N/15 mm; the secondary composite film after twice solvent-free online corona compounding has good high-barrier property and 121 ℃ high-temperature cooking resistance, and has good body stretching property and product appearance smoothness.
8. The device for compounding the high-barrier cooking skin stretching environment-friendly composite film according to claim 1 or 6, which comprises a first unwinding device (1), a gluing device, a second unwinding device (3), a thermal compounding device (5), a cooling device (6) and a winding device (2), and is characterized in that: further comprising a corona device (4);
the first unwinding device (1) is used for winding the unidirectional stretching polypropylene film;
the glue spreading device comprises a glue spreading compression roller (8) and a glue transmission roller (7), and the first unreeling device (1) is connected with the glue spreading compression roller (8) and the glue transmission roller (7) sequentially through a guide roller (9), a tension roller (10) and an auxiliary guide roller (11);
the second unwinding device (3) is used for winding a polyvinylidene chloride film or a primary composite film, and the second unwinding device (3) is connected with the corona device (4) sequentially through a guide roller (9) and a tension roller (10);
the thermal compounding device (5) is used for heating and compounding the unidirectional stretching polypropylene film and the polyvinylidene chloride film or the primary composite film, and the thermal compounding device (5) is respectively connected with the gluing device and the corona device (4) through a plurality of guide rollers (9);
the cooling device (6) is used for cooling the composite membrane passing through the thermal compounding device (5);
the winding device (2) is used for winding the primary composite film or the secondary composite film;
the automatic winding and unwinding device is characterized in that the first unwinding device (1), the gluing device, the second unwinding device (3), the corona device (4), the thermal compounding device (5), the cooling device (6), the winding device (2) and the rollers are all installed on the frame, the first unwinding device (1), the gluing device, the second unwinding device (3), the corona device (4), the thermal compounding device (5), the cooling device (6) and the winding device (2) are all connected with a motor, and the motor is connected with the PLC control system.
9. The apparatus of claim 8, wherein: corona unit (4) are including support (41), a plurality of guide roll (46), corona roller (42), the both ends of corona roller (42) and guide roll (46) are connected with the support respectively, and the top of corona roller (42) is equipped with corona generator, and corona generator's lower part is corona chamber (44), and the bottom of corona chamber (44) is equipped with electrode bar (43), and the top of corona chamber is equipped with exhaust duct (45), and electrode bar (43) are connected with the high voltage discharge device electricity.
10. The apparatus of claim 9, wherein: the electrode rod 43 in the corona chamber (44) is one or more, and the length of the electrode rod (43) is equal to or slightly less than that of the corona roller (42).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113650955A (en) * | 2021-08-23 | 2021-11-16 | 无锡市新浩保护膜有限公司 | Continuous automatic sealing and packaging film and production method and packaging method thereof |
| CN117261406A (en) * | 2023-11-23 | 2023-12-22 | 沈阳日新塑料包装制品股份有限公司 | High-barrier digestion body-attached stretching environment-friendly film preparation device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204471897U (en) * | 2015-01-23 | 2015-07-15 | 东莞市沃顿印刷有限公司 | For the corona unit of plastic cement printing material |
| CN206663832U (en) * | 2017-04-26 | 2017-11-24 | 重庆富美包装印务有限公司 | Corona decompressor for compounding machine |
| CN107618240A (en) * | 2017-09-26 | 2018-01-23 | 沈阳日新塑料包装制品有限公司 | Environment-friendly novel high-barrier resistance to 121oThe fit stretching composite membrane of C thermophilic digestions |
| CN208484318U (en) * | 2018-07-04 | 2019-02-12 | 沈阳日新塑料包装制品有限公司 | It is imitative that aluminium foil high-barrier digestion resistant is fit stretches drawing packaging film |
| CN208698019U (en) * | 2018-07-12 | 2019-04-05 | 沈阳日新塑料包装制品有限公司 | A kind of online corona unit of film |
-
2020
- 2020-07-10 CN CN202010663748.5A patent/CN113043688A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204471897U (en) * | 2015-01-23 | 2015-07-15 | 东莞市沃顿印刷有限公司 | For the corona unit of plastic cement printing material |
| CN206663832U (en) * | 2017-04-26 | 2017-11-24 | 重庆富美包装印务有限公司 | Corona decompressor for compounding machine |
| CN107618240A (en) * | 2017-09-26 | 2018-01-23 | 沈阳日新塑料包装制品有限公司 | Environment-friendly novel high-barrier resistance to 121oThe fit stretching composite membrane of C thermophilic digestions |
| CN208484318U (en) * | 2018-07-04 | 2019-02-12 | 沈阳日新塑料包装制品有限公司 | It is imitative that aluminium foil high-barrier digestion resistant is fit stretches drawing packaging film |
| CN208698019U (en) * | 2018-07-12 | 2019-04-05 | 沈阳日新塑料包装制品有限公司 | A kind of online corona unit of film |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113650955A (en) * | 2021-08-23 | 2021-11-16 | 无锡市新浩保护膜有限公司 | Continuous automatic sealing and packaging film and production method and packaging method thereof |
| CN117261406A (en) * | 2023-11-23 | 2023-12-22 | 沈阳日新塑料包装制品股份有限公司 | High-barrier digestion body-attached stretching environment-friendly film preparation device and method |
| CN117261406B (en) * | 2023-11-23 | 2024-01-12 | 沈阳日新塑料包装制品股份有限公司 | High-barrier digestion body-attached stretching environment-friendly film preparation device and method |
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Application publication date: 20210629 |