CN110682642A - Puncture-resistant meat low-temperature packaging film and production process thereof - Google Patents
Puncture-resistant meat low-temperature packaging film and production process thereof Download PDFInfo
- Publication number
- CN110682642A CN110682642A CN201911060096.XA CN201911060096A CN110682642A CN 110682642 A CN110682642 A CN 110682642A CN 201911060096 A CN201911060096 A CN 201911060096A CN 110682642 A CN110682642 A CN 110682642A
- Authority
- CN
- China
- Prior art keywords
- layer
- film
- temperature
- resistant
- puncture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- 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
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
-
- 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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/58—Cuttability
- B32B2307/581—Resistant to cut
-
- 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
- B32B2307/7265—Non-permeable
-
- 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
Abstract
The invention discloses a puncture-resistant meat low-temperature packaging film, which is 120-600 mu m thick and comprises a first upper film layer and a second lower film layer from top to bottom, wherein the structure of the first upper film layer sequentially comprises: the layer A, the layer B, the layer C, the layer D, the layer E, the layer F, the layer G, the layer H, the layer I and the layer J; the layer A is a self-adhesive layer, and the self-adhesive layer is directly connected with the second lower membrane layer; the layer B is a first water-resistant layer, the layer C is a functional layer, the layer D is a first bonding layer, the layer E is a first protective layer, the layer F is a barrier layer, the layer G is a second protective layer, the layer H is a second bonding layer, the layer I is a second water-resistant layer, and the layer J is a heat-sealing layer; the structures of the first upper film layer and the second lower film layer are in mirror symmetry; the invention also discloses a production process of the puncture-resistant meat low-temperature packaging film. The puncture-resistant meat low-temperature packaging film is of a completely symmetrical structure, and can completely meet the requirement of carrying out thermoforming packaging on products with larger volumes.
Description
Technical Field
The invention relates to the technical field of packaging films, in particular to a puncture-resistant meat low-temperature packaging film and a production process thereof.
Background
The water-cooling multilayer co-extrusion technology is a production mode which is widely applied and has mature technology at present, but the multilayer barrier stretch film prepared by the method has the following problems: firstly, after a PA high-barrier asymmetric stretch film (PA/TIE/PE/TIE/PA/EVOH/PA/TIE/PE/PE) produced at present is formed and packaged, the PA high-barrier asymmetric stretch film is directly quick-frozen for 1-2 hours at minus 30-minus 40 ℃, and then is placed into a freezing chamber at minus 18 ℃ for storage, because the performance of a common PA material can be reduced in a low-temperature environment, the material is more fragile at a lower temperature, collision packaging is easy to damage in the low-temperature environment, and PA on the surface layer is easier to damage in an unprotected environment; secondly, the number of layers of the existing water-cooling multilayer co-extrusion equipment is limited, the number of layers for producing PA and EVOH is limited, the total number of layers cannot be 20, and the performance improvement and the thickness specification of the product are greatly limited.
The applicant discloses a production method of a cross multi-barrier-layer co-extrusion film in Chinese patent publication No. CN105058825A in 2015, but the production process is not completely mature, so that the low-temperature resistance, the low-temperature puncture resistance and the like of the film prepared by the method cannot meet the packaging requirements of meat products at low temperature, particularly the storage requirements under the condition of quick freezing.
In order to meet the requirement of quick freezing and packaging of meat, the applicant proposes a puncture-resistant meat low-temperature packaging film.
Disclosure of Invention
The invention aims to provide a puncture-resistant meat low-temperature packaging film, aims to overcome the defects in the prior art, and provides the puncture-resistant meat low-temperature packaging film, the thickness of the puncture-resistant meat low-temperature packaging film can reach 600 mu m by improving the production process, the impact resistance, puncture resistance, low-temperature resistance and barrier property of the film are greatly improved, and the requirements of packaging large-volume meat products after thermoforming, such as low-temperature refrigeration transportation and the like can be met.
In order to achieve the purpose, the invention provides a puncture-resistant meat low-temperature packaging film in a first aspect, which is characterized in that the puncture-resistant meat low-temperature packaging film is 120-600 microns thick and is prepared by a down-blowing water-cooling multilayer co-extrusion film blowing process; from last rete and the second rete down including first going up to down, the structure of rete includes in proper order on the first: the layer A, the layer B, the layer C, the layer D, the layer E, the layer F, the layer G, the layer H, the layer I and the layer J;
the layer A is a self-adhesive layer, and the self-adhesive layer is directly connected with the second lower membrane layer; the thickness of the self-adhesive layer accounts for 8-15% of the total thickness of the first upper film layer, and the self-adhesive layer is made of a self-adhesive material; the self-adhesive material is one or a mixture of PE, EVA and Surlyn resin;
the layer B is a first water-resistant layer, the thickness of the first water-resistant layer accounts for 8-16% of the total thickness of the first upper film layer, and the layer B at least contains one of LDPE or LLDPE;
the layer C is a functional layer, the thickness of the functional layer accounts for 5-15% of the total thickness of the first upper film layer, and the functional layer at least contains one of PA or modified PE;
the layer D is a first bonding layer, the thickness of the first bonding layer accounts for 5-15% of the total thickness of the first upper film layer, and the first bonding layer is a mixture of tie and LLDPE;
the layer E is a first protective layer, the thickness of the first protective layer accounts for 5-12% of the total thickness of the first upper film layer, and the layer E is made of PA resin;
the F layer is a blocking layer, the thickness of the blocking layer accounts for 5-10% of the total thickness of the first upper film layer, and the blocking layer is made of EVOH resin;
the G layer is a second protective layer, the thickness of the second protective layer accounts for 5-12% of the total thickness of the first upper film layer, and the second protective layer is made of PA resin;
the H layer is a second bonding layer, the thickness of the second bonding layer accounts for 5-15% of the total thickness of the first upper film layer, and the second bonding layer is a mixture of tie and LLDPE;
the layer I is a second water-resistant layer, the thickness of the second water-resistant layer accounts for 8-16% of the total thickness of the first upper film layer, and the second water-resistant layer at least contains one of LDPE or LLDPE;
the J layer is a heat sealing layer, the thickness of the heat sealing layer accounts for 8-15% of the total thickness of the first upper film layer, and the heat sealing layer at least contains one of MLLDPE or LDPE;
the structures of the first upper film layer and the second lower film layer are in mirror symmetry.
Preferably, in the self-adhesive layer, the mass fraction of the EVA in the self-adhesive material is 80% to 100%.
Preferably, the first water-resistant layer and the second water-resistant layer contain LDPE and LLDPE, wherein the mass ratio of the LDPE to the LLDPE is 50: 50.
Preferably, in the first adhesive layer and the second adhesive layer, the mass ratio of tie to LLDPE is 30: 70.
Preferably, the functional layer contains PA and modified PE, wherein the mass ratio of PA to modified PE is 80: 20.
Preferably, the heat-sealing layer is a mixture of MLLDPE and LDPE, wherein the mass ratio of MLLDPE to LDPE is 60: 40.
The LLDPE adopted in the invention is Exxon 1002 AY; LDPE is Catalalite FE 8000; the modified PE is EBA DuPont 1400 MN; tie is DuPont Bynel 41E 687; EVA is Korean Dalal E180L; MLLDPE is Exxon Mobil exceeded 2018 KB. Other materials are all commercial products.
The second purpose of the invention is to provide a production process of the puncture-resistant meat low-temperature packaging film, which is characterized by comprising the following steps:
s1) feeding:
adding the raw materials of the layer A into a hopper of an extruder, melting at the temperature of 150-190 ℃, and feeding into a neck mold;
adding the raw materials of the layer B into a hopper of an extruder, melting at the temperature of 170-190 ℃, and entering a neck mold;
mixing the raw materials of the layer C, adding the mixture into a hopper of an extruder, melting the mixture at the temperature of 170-190 ℃, and feeding the mixture into a neck mold;
adding the raw material adhesive resin of the layer D into a hopper of an extruder, melting at 190-220 ℃, and feeding into a neck mold;
adding the raw material of the E layer into a hopper of an extruder, melting at 220-250 ℃, and feeding into a neck mold;
adding the raw material of the F layer into a hopper of an extruder, melting at 190-210 ℃, and feeding into a neck mold;
adding the raw materials of the G layer into a hopper of an extruder, melting at 220-250 ℃, and feeding into a neck mold;
adding the raw material of the H layer into a hopper of an extruder, melting at the temperature of 190-220 ℃, and entering a neck mold;
adding the raw materials of the layer I into a hopper of an extruder, melting at 190-220 ℃, and feeding into a neck mold;
adding the raw material polyethylene of the J layer into a hopper of an extruder, melting at the temperature of 180-220 ℃, and feeding into a neck mold;
s2) bubble extrusion sizing:
extruding the raw materials through a lower blow molding head to obtain a cylindrical film bubble, wherein the layer A is located on the inner layer of the film bubble, and after the film bubble is subjected to sizing, introducing the film bubble into a water ring located below a die head for water cooling, wherein the cooling temperature is 20-30 ℃;
s3) clip preheating: after the cylindrical film bubble cooled in the step S2 is introduced into the heating nip roller, the cylindrical film bubble is pressed into a double-layer sheet structure, and the double-layer sheet structure is preheated:
s4) heating and shaping:
heating the double-layer sheet structure shaped in the step S3 by a heating roller, and bonding the two A layers positioned in the middle of the double-layer sheet structure after heating to obtain a sheet film;
s5) cooling and rolling:
and (5) cooling the film obtained in the step (S4) by a cooling roller, and then cutting edges and rolling to obtain the puncture-resistant meat low-temperature packaging film.
Preferably, in step S2, the bubble thickness is 60 to 300 μm after the cylindrical bubble is sized.
Preferably, in step S4, the temperature of the heating roller is 65 to 95 ℃.
Preferably, in step S5, the temperature of the cooling roll is 5 to 10 ℃.
Compared with the prior art, the puncture-resistant meat low-temperature packaging film and the production process thereof have the following advantages:
1. the puncture-resistant meat low-temperature packaging film is of a completely symmetrical structure, the thickness of the packaging film can reach 600 mu m, and the requirements of thermoforming and packaging products with larger volume can be completely met;
2. by the production method of water-cooling bubble inclusion, 4 layers of water-resistant layers are arranged in the packaging film, so that the barrier property of the puncture-resistant meat low-temperature packaging film is greatly improved;
3. after the waterproof layer and the functional layer are added into the puncture-resistant meat low-temperature packaging film, the low-temperature puncture resistance of the packaging film is greatly improved by optimizing the formula of each layer of the film, and the meat products are conveniently frozen and transported.
Detailed Description
The present invention will be further described with reference to the following embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and the protection scope of the present invention is not limited thereby.
Abbreviations in the present invention are as follows:
PA: a polyamide;
PE: polyethylene;
PP: polypropylene;
modified PE: EBA;
LDPE (Low-Density polyethylene): low density polyethylene;
MLLDPE (mixed Low-Density polyethylene): metallocene linear low density polyethylene;
LLDPE: linear low density polyethylene;
EVOH (3) in the following ratio: ethylene-vinyl alcohol copolymers;
EVA: ethylene-vinyl acetate copolymers;
and (2) Surlyn: ethylene-acrylic acid resins;
TIE: anhydride modified ethylene vinyl acetate.
The present invention will be further described with reference to the following specific examples.
Example 1
The low-temperature packaging film for the puncture-resistant meat is 120 mu m thick and is prepared by a down-blowing water-cooling multilayer co-extrusion film blowing process; from last rete and the rete under including first rete and the second down to down, the thickness of the rete is 60 mu m on the first, and the first rete structure of going up includes in proper order: the layer A, the layer B, the layer C, the layer D, the layer E, the layer F, the layer G, the layer H, the layer I and the layer J; the structures of the first upper film layer and the second lower film layer are in mirror symmetry. The layer thicknesses of the layers of the first, upper film layer are listed in table 1;
the layer A is a self-adhesive layer, and the self-adhesive layer is directly connected with the second lower membrane layer; the self-adhesive layer is composed of self-adhesive materials, the self-adhesive materials are PE and EVA, and the mass fraction of the EVA is 80%;
the layer B is a first water-resistant layer which is LDPE;
the layer C is a functional layer, and the functional layer is PA;
the layer D is a first adhesive layer, the first adhesive layer is a mixture of tie and LLDPE, and the mass ratio of tie to LLDPE is 30: 70;
the E layer is a first protective layer, and the first protective layer is PA resin;
the F layer is a barrier layer, and the barrier layer is EVOH resin;
the G layer is a second protective layer, and the second protective layer is PA resin;
the H layer is a second adhesive layer, the second adhesive layer is a mixture of tie and LLDPE, and the mass ratio of tie to LLDPE is 30: 70;
the layer I is a second water-resistant layer which is LLDPE;
the J layer is a heat sealing layer, and the heat sealing layer is MLLDPE.
The LLDPE used in this example was exxon 1002 AY; LDPE is Catalalite FE 8000; the modified PE is EBA DuPont 1400 MN; tie is DuPont Bynel 41E 687; EVA is Korean Dalal E180L; MLLDPE is Exxon Mobil exceeded 2018 KB. Other materials are all commercial products.
The production process for preparing the puncture-resistant meat low-temperature packaging film comprises the following steps:
s1) feeding:
adding the raw materials of the layer A into a hopper of an extruder, melting at the temperature of 150-190 ℃, and feeding into a neck mold;
adding the raw materials of the layer B into a hopper of an extruder, melting at the temperature of 170-190 ℃, and entering a neck mold;
mixing the raw materials of the layer C, adding the mixture into a hopper of an extruder, melting the mixture at the temperature of 170-190 ℃, and feeding the mixture into a neck mold;
adding the raw material adhesive resin of the layer D into a hopper of an extruder, melting at 190-220 ℃, and feeding into a neck mold;
adding the raw material PA of the E layer into a hopper of an extruder, melting at the temperature of 220-250 ℃, and entering a neck mold;
adding EVOH (ethylene-vinyl alcohol) serving as a raw material of the F layer into a hopper of an extruder, melting at 190-210 ℃, and feeding into a neck mold;
adding the raw material PA of the G layer into a hopper of an extruder, melting at 220-250 ℃, and feeding into a neck mold;
adding raw material bonding resin of the H layer into a hopper of an extruder, melting at 190-220 ℃, and feeding into a neck mold;
adding the raw material PE of the layer I into a hopper of an extruder, melting at 190-220 ℃, and feeding into a neck mold;
adding the raw material polyethylene of the J layer into a hopper of an extruder, melting at the temperature of 180-220 ℃, and feeding into a neck mold;
s2) bubble extrusion sizing:
extruding raw materials through a lower blow molding head to obtain a cylindrical film bubble, wherein the layer A is positioned on the inner layer of the film bubble, and after the film bubble is subjected to sizing, introducing the film bubble into a water ring positioned below a die head for water cooling, wherein the cooling temperature is 30 ℃; after the film bubble is shaped, the thickness of the film bubble is 60 mu m;
s3) clip preheating:
after the cylindrical film bubble cooled in the step S2 is introduced into the heating nip roller, the cylindrical film bubble is pressed into a double-layer sheet structure, and the double-layer sheet structure is preheated:
s4) heating and shaping:
heating the double-layer sheet structure shaped in the step S3 by a heating roller, wherein the temperature of the heating roller is 95 ℃, and bonding the two A layers positioned in the middle of the double-layer sheet structure after heating to obtain a sheet film;
s5) cooling and rolling:
and (5) cooling the film obtained in the step (S4) by a cooling roller, wherein the temperature of the cooling roller is 5 ℃, and then trimming and winding to obtain the puncture-resistant meat low-temperature packaging film.
Example 2
The structure of the puncture-resistant meat low-temperature packaging film of the embodiment is the same as that of embodiment 1, and the difference is that:
the low-temperature packaging film for the puncture-resistant meat is 300 mu m in thickness and is prepared by a down-blowing water-cooling multilayer co-extrusion film blowing process; the film comprises a first upper film layer and a second lower film layer from top to bottom, wherein the thickness of the first upper film layer is 150 micrometers, and the thickness of each layer of the first upper film layer is shown in table 1;
the self-adhesive material in the layer A is surlyn and EVA, and the mass fraction of the EVA is 90%;
the layer B is LLDPE;
the layer C is modified PE;
the I layer is LDPE;
the J layer is LDPE.
The LLDPE used in this example was saute QAMAR FD21 HS; LDPE is Basel Lupolen 2421F; the modified PE is EBA DuPont 1400 MN; tie is DuPont Bynel 41E 687; EVA is Korean Dalal E180L; other materials are all commercial products.
The production process of the puncture-resistant meat low-temperature packaging film in the embodiment is the same as that in the embodiment 1, and is different from that in the following steps:
in step S2, the cooling temperature of water cooling is 25 ℃; after the film bubble is shaped, the thickness of the film bubble is 150 μm;
the temperature of the heating roller in the step S4 is 75 ℃;
the temperature of the cooling roll in step S5 was 7 ℃.
Example 3
The low-temperature packaging film for the puncture-resistant meat is 600 microns thick and is prepared by a down-blowing water-cooling multilayer co-extrusion film blowing process; the film comprises a first upper film layer and a second lower film layer from top to bottom, wherein the thickness of the first upper film layer is 300 mu m, and the thickness of each layer of the first upper film layer is shown in table 1.
The self-adhesive material in the layer A is EVA, and the mass fraction of the EVA is 100%;
the layer B and the layer I contain LDPE and LLDPE, wherein the mass ratio of the LDPE to the LLDPE is 50: 50;
the layer C contains PA and modified PE, wherein the mass ratio of PA to modified PE is 80: 20;
the J layer is a mixture of MLLDPE and LDPE, and the mass ratio is 60: 40.
The LLDPE used in this example was saute QAMAR FD21 HS; LDPE is US Exxon Mobil LD 150 BW; the modified PE is EBA Germany Lucobi 1492M HG; tie is Ellipril TL 4110; EVA is DuPont 3165 SB; other materials are all commercial products.
The production process of the puncture-resistant meat low-temperature packaging film in the embodiment is the same as that in the embodiment 1, and is different from that in the following steps:
in step S2, the cooling temperature of water cooling is 20 ℃; after the film bubble is shaped, the thickness of the film bubble is 300 mu m;
the temperature of the heating roller in the step S4 is 65 ℃;
the temperature of the cooling roll in step S5 was 10 ℃.
Comparative example 1
The puncture-resistant meat low-temperature packaging film of the comparative example is the same as example 1, except that,
in the first adhesive layer and the second adhesive layer, the mass ratio of tie to LLDPE is 50: 50;
in the functional layer, the mass ratio of the PA to the modified PE is 30: 70.
The production process of the puncture-resistant meat low-temperature packaging film of the embodiment is the same as that of the embodiment 1.
TABLE 1
| Structure of the product | Example 1 | Example 2 | Example 3 |
| First upper film layer | 60μm | 150μm | 300μm |
| Layer A (mum) | 9 | 15 | 24 |
| Layer B (mum) | 9.6 | 15 | 24 |
| Layer C (μm) | 3 | 22.5 | 27 |
| D layer (mum) | 6 | 7.5 | 45 |
| E layer (mum) | 3 | 18 | 24 |
| F layer(μm) | 6 | 12 | 15 |
| G layer (mum) | 3 | 18 | 24 |
| H layer (mum) | 6 | 7.5 | 45 |
| Layer I (mum) | 9.6 | 12 | 36 |
| J layer (mum) | 4.8 | 22.5 | 36 |
Test method and test result
The performance tests and performance requirements of examples 1-3 and comparative example 1 are as follows, and the test results are listed in Table 1.
1. Testing of tensile strength and elongation at break: the packaging films of examples 1 to 3 and comparative example 1 were tested according to GB13022-1991 method for testing tensile properties of Plastic films,
when the tensile strength is more than or equal to 32Mpa, the product is qualified; otherwise, the product is unqualified;
when the elongation at break is more than or equal to 450 percent, the product is qualified; otherwise, the product is not qualified.
2. Dart impact test: the packaging films of examples 1-3 and comparative example 1 were tested according to the GBT9639.1-2008 method for impact resistance testing of plastic films and sheets-free falling dart method, where 5.6 falling dart was selected as the B method of 5.6.2. When the impact damage quality of the falling dart is more than or equal to 800, the falling dart is qualified; otherwise, the product is not qualified.
3. Puncture resistance: the packaging films of examples 1-3 and comparative example 1 were tested according to the puncture strength testing method in GB/T10004-2008 "Plastic composite film for packaging, bag Dry composite, extrusion composite", and the films prepared in the examples and comparative examples were tested for puncture strength at normal temperature and puncture strength at low temperature using a 2.5mm needle. And (3) testing temperature: the normal temperature test refers to the test temperature of 25 ℃; low temperature test means a test temperature of-38 ℃.
When the puncture strength is greater than 15N/15mm in the normal temperature test, the product is qualified; otherwise, the product is unqualified;
when the puncture strength is greater than 10N/15mm in the low-temperature test, the product is qualified; otherwise, the product is unqualified;
4. oxygen transmission rate test: the low-temperature meat packaging films prepared in examples 1-3 and comparative example 1 were tested by GB/T1038-2000 pressure differential method of Plastic film and sheet gas permeability test method.
When the oxygen transmission rate is less than 3cc/m2When the data is/day, the product is qualified; otherwise, the product is not qualified.
5. Testing the water vapor transmission rate: the low-temperature meat packaging films prepared in examples 1-3 and comparative example 1 were tested by GB1037-88 test method for Water vapor permeability of Plastic films and sheets.
When the water vapor transmission rate is less than 5g/m2When the data is/day, the product is qualified; otherwise, the product is not qualified.
TABLE 2
From the test results in table 2, it can be seen that the packaging film produced by the down-blowing water-cooling bubble-sandwiching production method has 4 water-blocking layers in the packaging film, thereby greatly improving the barrier property; and by optimizing the formula of the waterproof layer and the functional layer of the packaging film, the production cost of the packaging film is reduced, the puncture resistance of the packaging film under the low-temperature condition is improved, and the meat product is convenient to freeze and transport.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is capable of various modifications and substitutions without departing from the spirit of the invention.
Claims (10)
1. The puncture-resistant meat low-temperature packaging film is characterized by being 120-600 mu m thick and prepared by a down-blowing water-cooling multilayer co-extrusion film blowing process; from last rete and the second rete down including first going up to down, the structure of rete includes in proper order on the first: the layer A, the layer B, the layer C, the layer D, the layer E, the layer F, the layer G, the layer H, the layer I and the layer J;
the layer A is a self-adhesive layer, and the self-adhesive layer is directly connected with the second lower membrane layer; the thickness of the self-adhesive layer accounts for 8-15% of the total thickness of the first upper film layer, and the self-adhesive layer is made of a self-adhesive material; the self-adhesive material is one or a mixture of PE, EVA and Surlyn resin;
the layer B is a first water-resistant layer, the thickness of the first water-resistant layer accounts for 8-16% of the total thickness of the first upper film layer, and the layer B at least contains one of LDPE or LLDPE;
the layer C is a functional layer, the thickness of the functional layer accounts for 5-15% of the total thickness of the first upper film layer, and the functional layer at least contains one of PA or modified PE;
the layer D is a first bonding layer, the thickness of the first bonding layer accounts for 5-15% of the total thickness of the first upper film layer, and the first bonding layer is a mixture of tie and LLDPE;
the layer E is a first protective layer, the thickness of the first protective layer accounts for 5-12% of the total thickness of the first upper film layer, and the layer E is made of PA resin;
the F layer is a blocking layer, the thickness of the blocking layer accounts for 5-10% of the total thickness of the first upper film layer, and the blocking layer is made of EVOH resin;
the G layer is a second protective layer, the thickness of the second protective layer accounts for 5-12% of the total thickness of the first upper film layer, and the second protective layer is made of PA resin;
the H layer is a second bonding layer, the thickness of the second bonding layer accounts for 5-15% of the total thickness of the first upper film layer, and the second bonding layer is a mixture of tie and LLDPE;
the layer I is a second water-resistant layer, the thickness of the second water-resistant layer accounts for 8-16% of the total thickness of the first upper film layer, and the second water-resistant layer at least contains one of LDPE or LLDPE;
the J layer is a heat sealing layer, the thickness of the heat sealing layer accounts for 8-15% of the total thickness of the first upper film layer, and the heat sealing layer at least contains one of MLLDPE or LDPE;
the structures of the first upper film layer and the second lower film layer are in mirror symmetry.
2. The low-temperature puncture-resistant meat packaging film as claimed in claim 1, wherein the mass fraction of EVA in the self-adhesive material in the self-adhesive layer is 80-100%.
3. The low-temperature puncture-resistant meat packaging film as claimed in claim 1, wherein the first water-resistant layer and the second water-resistant layer contain LDPE and LLDPE, and the mass ratio of the LDPE to the LLDPE is 50: 50.
4. The low temperature packaging film for puncture-resistant meat as claimed in claim 1, wherein the weight ratio of tie to LLDPE in the first adhesive layer and the second adhesive layer is 30: 70.
5. The low-temperature puncture-resistant meat packaging film as claimed in claim 1, wherein the functional layer contains PA and modified PE, and the mass ratio of PA to modified PE is 80: 20.
6. The low-temperature puncture-resistant meat packaging film as claimed in claim 1, wherein the heat-sealing layer is a mixture of MLLDPE and LDPE, and the mass ratio of MLLDPE to LDPE is 60: 40.
7. A production process for preparing the puncture-resistant meat low-temperature packaging film as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
s1) feeding:
adding the raw materials of the layer A into a hopper of an extruder, melting at the temperature of 150-190 ℃, and feeding into a neck mold;
adding the raw materials of the layer B into a hopper of an extruder, melting at the temperature of 170-190 ℃, and entering a neck mold;
mixing the raw materials of the layer C, adding the mixture into a hopper of an extruder, melting the mixture at the temperature of 170-190 ℃, and feeding the mixture into a neck mold;
adding the raw material adhesive resin of the layer D into a hopper of an extruder, melting at 190-220 ℃, and feeding into a neck mold;
adding the raw material of the E layer into a hopper of an extruder, melting at 220-250 ℃, and feeding into a neck mold;
adding the raw material of the F layer into a hopper of an extruder, melting at 190-210 ℃, and feeding into a neck mold;
adding the raw materials of the G layer into a hopper of an extruder, melting at 220-250 ℃, and feeding into a neck mold;
adding the raw material of the H layer into a hopper of an extruder, melting at the temperature of 190-220 ℃, and entering a neck mold;
adding the raw materials of the layer I into a hopper of an extruder, melting at 190-220 ℃, and feeding into a neck mold;
adding the raw material polyethylene of the J layer into a hopper of an extruder, melting at the temperature of 180-220 ℃, and feeding into a neck mold;
s2) bubble extrusion sizing:
extruding the raw materials through a lower blow molding head to obtain a cylindrical film bubble, wherein the layer A is located on the inner layer of the film bubble, and after the film bubble is subjected to sizing, introducing the film bubble into a water ring located below a die head for water cooling, wherein the cooling temperature is 20-30 ℃;
s3) clip preheating: after the cylindrical film bubble cooled in the step S2 is introduced into the heating nip roller, the cylindrical film bubble is pressed into a double-layer sheet structure, and the double-layer sheet structure is preheated:
s4) heating and shaping:
heating the double-layer sheet structure shaped in the step S3 by a heating roller, and bonding the two A layers positioned in the middle of the double-layer sheet structure after heating to obtain a sheet film;
s5) cooling and rolling:
and (5) cooling the film obtained in the step (S4) by a cooling roller, and then cutting edges and rolling to obtain the puncture-resistant meat low-temperature packaging film.
8. A production process of a puncture-resistant meat low-temperature packaging film is characterized in that in step S2, after cylindrical bubble sizing, the thickness of the bubble is 60-300 microns.
9. The production process of the puncture-resistant meat low-temperature packaging film is characterized in that in the step S4, the temperature of a heating roller is 65-95 ℃.
10. The production process of the puncture-resistant meat low-temperature packaging film is characterized in that in the step S5, the temperature of a cooling roller is 5-10 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911060096.XA CN110682642B (en) | 2019-11-01 | 2019-11-01 | Puncture-resistant meat low-temperature packaging film and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911060096.XA CN110682642B (en) | 2019-11-01 | 2019-11-01 | Puncture-resistant meat low-temperature packaging film and production process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110682642A true CN110682642A (en) | 2020-01-14 |
| CN110682642B CN110682642B (en) | 2021-08-27 |
Family
ID=69115317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911060096.XA Active CN110682642B (en) | 2019-11-01 | 2019-11-01 | Puncture-resistant meat low-temperature packaging film and production process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110682642B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111806014A (en) * | 2020-07-20 | 2020-10-23 | 山东齐鲁乙烯化工股份有限公司 | Polyethylene low-temperature puncture-resistant packaging film and preparation method thereof |
| CN113291018A (en) * | 2021-06-09 | 2021-08-24 | 浙江金仪盛世生物工程有限公司 | EVA-containing film material for disposable bioprocess bag and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203994950U (en) * | 2014-06-30 | 2014-12-10 | 江阴升辉包装材料有限公司 | A kind of high-barrier package sheet material with good print |
| CN109263164A (en) * | 2018-10-12 | 2019-01-25 | 江阴升辉包装材料有限公司 | A kind of water bag film that low smell high barrier is multi-layer co-extruded |
| CN109397779A (en) * | 2018-11-22 | 2019-03-01 | 江阴升辉包装材料有限公司 | A kind of high resistant oxygen film and the preparation method and application thereof |
-
2019
- 2019-11-01 CN CN201911060096.XA patent/CN110682642B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203994950U (en) * | 2014-06-30 | 2014-12-10 | 江阴升辉包装材料有限公司 | A kind of high-barrier package sheet material with good print |
| CN109263164A (en) * | 2018-10-12 | 2019-01-25 | 江阴升辉包装材料有限公司 | A kind of water bag film that low smell high barrier is multi-layer co-extruded |
| CN109397779A (en) * | 2018-11-22 | 2019-03-01 | 江阴升辉包装材料有限公司 | A kind of high resistant oxygen film and the preparation method and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111806014A (en) * | 2020-07-20 | 2020-10-23 | 山东齐鲁乙烯化工股份有限公司 | Polyethylene low-temperature puncture-resistant packaging film and preparation method thereof |
| CN111806014B (en) * | 2020-07-20 | 2021-08-10 | 山东齐鲁乙烯化工股份有限公司 | Polyethylene low-temperature puncture-resistant packaging film and preparation method thereof |
| CN113291018A (en) * | 2021-06-09 | 2021-08-24 | 浙江金仪盛世生物工程有限公司 | EVA-containing film material for disposable bioprocess bag and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110682642B (en) | 2021-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101306593B (en) | Multilayer coextruding pyrocondensation film | |
| CN102248735B (en) | Polyolefin film used for packaging and preparation method thereof | |
| CN111531991B (en) | Polyethylene composite film capable of being recovered by 100%, and preparation method and application thereof | |
| JP2927928B2 (en) | Multi-layer polyethylene stretch shrink film and method for producing the same | |
| US6391411B1 (en) | Machine direction oriented high molecular weight, high density polyethylene films with enhanced water vapor transmission properties | |
| CN103085415B (en) | Packaging polyolefin film and preparation method thereof | |
| CN110682642B (en) | Puncture-resistant meat low-temperature packaging film and production process thereof | |
| CN102173156A (en) | Biaxial tension polyethylene film and preparation method thereof | |
| CN109367044B (en) | High-impact-resistance biaxially oriented polyester/polyamide film and preparation method thereof | |
| CN109605890B (en) | Three-layer co-extrusion ultralow-temperature heat-sealing packaging film | |
| CN102416744A (en) | Food packaging plastic substrate film and production technology thereof | |
| CN102501513A (en) | Puncture-resistant heavy packaging composite film and preparation thereof | |
| CN102765190B (en) | Method for producing biaxially oriented multilayer co-extruded polyolefin shrink film by flat film process | |
| KR20200077666A (en) | Film for packaging food | |
| CN103009761A (en) | Polyolefin heat-shrinkable film with high shrinking percentage and manufacturing method thereof | |
| CN110385905B (en) | Laminated co-extrusion film containing double-protection core barrier layers and production process thereof | |
| CN106476384A (en) | A kind of novel environment-friendly high-barrier CPP thin film and preparation method thereof | |
| EP4126538A1 (en) | Multilayer polymer film | |
| CN100427299C (en) | Method for producing low temperature high shrinkage polyolefine heat shrinking film and produced film | |
| CN111819237B (en) | Sealing resin composition, multilayer film for sealing, heat-sealable laminate film, and package | |
| CN103648749A (en) | Method for manufacturing oriented polyolefin film and oriented polyolefin film manufactured therefrom | |
| CN112959776B (en) | Packaging film, preparation method and packaging bag | |
| KR20230109154A (en) | Polyolefin-based resin film and laminate using the same | |
| KR20230105683A (en) | Polyolefin-based resin film and laminate using the same | |
| CN110843306A (en) | Antifogging high-barrier micro-shrinkage cooked food packaging film and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: No.2, Tonggang Road, Changjing Town, Jiangyin, Wuxi City, Jiangsu Province Applicant after: Shenghui New Material Co.,Ltd. Address before: No.2, Tonggang Road, Changjing Town, Jiangyin, Wuxi City, Jiangsu Province Applicant before: JIANGYIN SUNRISE PACKAGING MATERIAL Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |