CN102689471A - Soft-type semi-high-temperature cooking film and manufacturing method thereof - Google Patents
Soft-type semi-high-temperature cooking film and manufacturing method thereof Download PDFInfo
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- CN102689471A CN102689471A CN2011100705526A CN201110070552A CN102689471A CN 102689471 A CN102689471 A CN 102689471A CN 2011100705526 A CN2011100705526 A CN 2011100705526A CN 201110070552 A CN201110070552 A CN 201110070552A CN 102689471 A CN102689471 A CN 102689471A
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- 238000010411 cooking Methods 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000010410 layer Substances 0.000 claims abstract description 100
- 239000012792 core layer Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 39
- 229920001971 elastomer Polymers 0.000 claims description 18
- 239000000806 elastomer Substances 0.000 claims description 18
- -1 propylene-ethylene Chemical group 0.000 claims description 13
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 11
- 239000005977 Ethylene Substances 0.000 claims description 11
- 229920005604 random copolymer Polymers 0.000 claims description 11
- 238000004512 die casting Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 9
- 229920005606 polypropylene copolymer Polymers 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000009835 boiling Methods 0.000 abstract description 11
- 235000013305 food Nutrition 0.000 abstract description 11
- 238000005266 casting Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 244000017160 saligot Species 0.000 abstract description 2
- 235000009165 saligot Nutrition 0.000 abstract description 2
- 235000021059 hard food Nutrition 0.000 abstract 1
- 239000012793 heat-sealing layer Substances 0.000 abstract 1
- 239000010408 film Substances 0.000 description 64
- 238000012360 testing method Methods 0.000 description 16
- 239000000203 mixture Substances 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 4
- 230000029087 digestion Effects 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000021485 packed food Nutrition 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 235000013594 poultry meat Nutrition 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
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- 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
- 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
- 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
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a soft-type semi-high-temperature cooking film, which comprises a heat-sealing layer, a core layer and a corona layer and is prepared by a casting technology of co-extrusion of multiple extruders in a T-die. Compared with a prior art, the method of the invention is convenient for production. When packaging food, especially hard food and food with water caltrop shape, the prepared film will not rupture if it falls off from a height during transportation, storage and boiling, and has high impact resistance; after placing at -10 DEG C for 4h, the film can resist impact of 180g falling ball from a height of 1520mm and can be boiled at 121 DEG C for 45 min.
Description
Technical field
The present invention relates to a kind of boiling film, especially relate to a kind of soft type half Tropical cooking film and preparation method thereof.
Background technology
The boiling film is divided into Tropical cooking film and half Tropical cooking film according to the difference of boiling temperature, and wherein the boiling temperature of Tropical cooking film is 135 degree, and the boiling temperature of half Tropical cooking film is 121 degree, and what this patent related to is half Tropical cooking film.The erosion-resisting characteristics of common half Tropical cooking film is general, when packing hard, food such as band corner angle etc., like rice, poultry meat, falls from eminence and to cause breakage of packing easily, and it is very inconvenient to use for like this transportation and carrying to bring.For designing the Tropical cooking film that is difficult for breaking, then require film to have higher erosion-resisting characteristics, under conditions such as boiling, refrigeration, transportation, do not fall and can break.My department develops a kind of soft type half Tropical cooking film for this reason.
Along with Chinese economic development, the prosperity of tourist industry, economic emergence golden week, people are increasing to the demand of instant food.The not only numerous in variety but also enormous amount of various foods packed in carton containers and high-temperature cooking food; In order to have guaranteed the fresh and nutrition of instant food; Prolonged the shelf-life of instant food; And guarantee in transportation, do not damage in the storage process, need the packing film of high temperature resistant, anti-boiling, low temperature resistant, anti-HI high impact.Soft type half Tropical cooking film that the present invention produces is mainly used in above-mentioned packaging material for food exactly.It is firm that the required characteristics of packaging material for food are exactly in certain heat-sealing temperature scope, to seal involution; With container under low temperature, high temperature, pressurized condition; Bonded to each other and seal, film has stronger impact resistance, breaks to prevent that packed products from producing when eminence is fallen.
Summary of the invention
One object of the present invention is exactly to provide a kind of soft type shock-resistant, half Tropical cooking film of cracky not in order to overcome the defective that above-mentioned prior art exists.
To achieve these goals, technical scheme of the present invention is following: a kind of soft type half Tropical cooking film is characterized in that this soft type half Tropical cooking film comprises hot sealing layer, sandwich layer and the corona layer that is arranged in order.
Described hot sealing layer is a polypropylene copolymer; Extrude 220 ~ 240 ℃ of plasticizings through the extruder plasticizing, described sandwich layer is extruded under 230 ~ 250 ℃ of conditions through the sandwich layer extruder for adding the second third elastomeric Noblen; The material of described corona layer is a propylene-ethylene random copolymer; Plastify under 230 ~ 250 ℃ of conditions through extruder and to extrude, three layers simultaneously through a T die casting film-forming then, and the corona spark is carried out on the surface of corona layer handle.
The thickness of described soft type half Tropical cooking film is 40-80 μ m.
Hot sealing layer thickness is 5 ~ 20 μ m, and core layer thickness is 30 ~ 50 μ m, and the corona layer thickness is 5 ~ 20 μ m.
In the described adding second third elastomeric Noblen, the second third elastomeric ethylene contents is 10-25%, and the weight ratio of second third elastomer and Noblen is (10-30) ︰ 100.
Another object of the present invention just provides a kind of preparation method of anti-half Tropical cooking film, and the defective that can overcome above-mentioned prior art existence is produced a kind of soft type anti-half Tropical cooking film shock-resistant, not cracky.
To achieve these goals; Technical scheme of the present invention is following: a kind of preparation method of soft type half Tropical cooking film; It is characterized in that; This method may further comprise the steps: select for use polypropylene copolymer to make hot sealing layer, its melt index is 8-12g/10min, under 220 ~ 240 ℃ of conditions, plastifies and extrudes; Select for use and add the second third elastomeric Noblen manufacturing sandwich layer; Melt index is 6-8g/10min, under 230 ~ 250 ℃ of conditions, plastifies and extrudes, and selects for use propylene-ethylene random copolymer to make the corona layer; Melt index is 6-8g/10min; Hot sealing layer is extruded 230 ~ 250 ℃ of plasticizings, and three layers simultaneously through a T die casting film-forming then, and the corona spark is carried out on the surface of corona layer handle; Make its corona tension force become 40-50mN/m, the soft type half Tropical cooking film gross thickness that obtains is 40-80 μ m.
Wherein hot sealing layer thickness is 5 ~ 20 μ m, and core layer thickness is 30 ~ 50 μ m, and the corona layer thickness is 5 ~ 20 μ m.
In the described adding second third elastomeric Noblen, the second third elastomeric ethylene contents is 10-25%, and the weight ratio of second third elastomer and Noblen is (10-30) ︰ 100.
Compared with prior art, the present invention is convenient for production, and the film of making is at packaged food particularly when hard, band water caltrop shape food, when transportation, storage, boiling, falls from eminence to be difficult for breaking, and has the high-impact ability.The invention has the advantages that preparation is convenient, under low temperature, high temperature, pressurized condition, bonded to each other and seal; Film is comparatively soft; Have stronger impact resistance, break to prevent that packed products from producing when eminence is fallen, this soft type half Tropical cooking film is behind-10 ℃ of placement 4h; Anti-1520mm height 180g ball falling impact; This soft type half Tropical cooking film is 180 ℃ of heat-sealing temperatures, and heat-sealing speed is after 200mm * 100mm sack of processing under the 3.5m/min is loaded onto the deionized water of about 2/3 capacity, and is broken 121 ℃ of following boilings 45 minutes.The present invention's half thermophilic digestion membrane material can be widely used in various packings, for example directly is processed into various packaging bags with this soft type half thermophilic digestion membrane material.
Description of drawings
Fig. 1 is the structural representation of this soft type half Tropical cooking film.
Fig. 2 is heat-sealing experimental result table.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
A kind of soft type half Tropical cooking film is characterized in that, this soft type half Tropical cooking film comprises hot sealing layer 1, sandwich layer 2 and the corona layer 3 that is arranged in order.
A kind of preparation method of soft type half Tropical cooking film is characterized in that, this method may further comprise the steps: select for use polypropylene copolymer to make hot sealing layer, its melt index is 8-12g/10min, under 220 ~ 240 ℃ of conditions, plastifies and extrudes; Select for use to add the second third elastomeric Noblen manufacturing sandwich layer 2, melt index is 6-8g/10min, under 230 ~ 250 ℃ of conditions, plastifies and extrudes; Select for use propylene-ethylene random copolymer to make the corona layer, melt index is 6-8g/10min, and hot sealing layer is extruded 230 ~ 250 ℃ of plasticizings; Three layers simultaneously through a T die casting film-forming then; The casting roller chilling temperature is 23 ~ 27 ℃, again with the speed rolling of 60 ~ 70m/min, and the corona spark is carried out on the surface of corona layer handle; Make its corona tension force become 40-50mN/m, the soft type half Tropical cooking film gross thickness that obtains is 40-80 μ m.
Wherein hot sealing layer thickness is 5 ~ 20 μ m, and core layer thickness is 30 ~ 50 μ m, and the corona layer thickness is 5 ~ 20 μ m.
In the described adding second third elastomeric Noblen, the second third elastomeric ethylene contents is 10-30%, and the weight ratio of second third elastomer and Noblen is (10-30) ︰ 100.Preferably, the second third elastomeric ethylene contents is 20-25%, and the weight ratio of second third elastomer and Noblen is (15-20) ︰ 100.
Half Tropical cooking film, its structure such as Fig. 1 are said, comprise the hot sealing layer 1, sandwich layer 2 and the corona layer 3 that are arranged in order, select for use polypropylene copolymer to make hot sealing layer 1; Its melt index is 8-12g/10min (test condition: standard bore 2.095mm, 230 ℃ of temperature, load 2.16kg), extrudes through the extruder plasticizing at last and obtains film; Select for use the Noblen blend to make sandwich layer 2, extrude through the extruder plasticizing and obtain, melt index is a 6-8g/10min (test condition: standard bore 2.095mm; 230 ℃ of temperature, load 2.16kg), select for use propylene-ethylene random copolymer to make corona layer 3; Melt index is 6-8g/10min (test condition: standard bore 2.095mm, 230 ℃ of temperature, load 2.16kg); Hot sealing layer is extruded 230 ℃ of plasticizings, and sandwich layer and corona layer plastify under 240 ℃ of conditions and extrude, then through a T die casting film-forming; The casting roller chilling temperature is 25 ℃, with the speed rolling of 63m/min, the corona spark is carried out on the surface of corona layer handle again; Make its corona tension force become 46mN/m, resulting soft type half Tropical cooking film gross thickness is 60 μ m, and wherein core layer thickness is 38 μ m.
Half Tropical cooking film to preparing is tested as follows.
(1) with half Tropical cooking film 180 ℃ of heat-sealing temperatures; Heat-sealing speed is after 200mm * 100mm sack of processing under the 3.5m/min is loaded onto the deionized water of about 2/3 capacity; 121 ℃ of following boilings 45 minutes, used instrument was that sealing machine and mashed plum restrain back-pressure thermophilic digestion Guo to FRT-10W type film continuously automatically.
(2) half Tropical cooking film are highly used the constant weight ball falling impact at 1520mm behind-10 ℃ of placement 4h.Experimental result is as shown in Figure 2.
Soft type half Tropical cooking film, its structure such as Fig. 1 are said, comprise hot sealing layer 1, sandwich layer 2 and corona layer 3, select for use propylene copolymer to make hot sealing layer 1; Its melt index is 8-12g/10min (test condition: standard bore 2.095mm, 230 ℃ of temperature, load 2.16kg); Extrude through extruder plasticizing at last and obtain film, select for use second third elastomer and Noblen blend to make sandwich layer 2, plastify to extrude through extruder and obtain; Melt index is 6-8g/10min (test condition: standard bore 2.095mm, 190 ℃ of temperature, load 2.16kg); Wherein the second third elastomeric ethylene contents is 10%, and the weight ratio of second third elastomer and Noblen is 10 ︰ 100, selects for use propylene-ethylene random copolymer to make corona layer 3; Melt index is 6-8g/10min (test condition: standard bore 2.095mm, 230 ℃ of temperature, load 2.16kg); Hot sealing layer is extruded 230 ℃ of plasticizings, and sandwich layer and corona layer plastify under 240 ℃ of conditions and extrude, then through a T die casting film-forming; The casting roller chilling temperature is 25 ℃, with the speed rolling of 63m/min, the corona spark is carried out on the surface of corona layer handle again; Make its corona tension force become 46mN/m, resulting soft type half Tropical cooking film gross thickness is 60 μ m, and wherein core layer thickness is 38 μ m.
Soft type half Tropical cooking film to preparing seals experiment, and the result is as shown in Figure 2.
Soft type half Tropical cooking film, its structure such as Fig. 1 are said, comprise hot sealing layer 1, sandwich layer 2 and corona layer 3, select for use propylene copolymer to make hot sealing layer 1; Its melt index is 8-12g/10min (test condition: standard bore 2.095mm, 230 ℃ of temperature, load 2.16kg); Extrude through extruder plasticizing at last and obtain film, select for use second third elastomer and Noblen blend to make sandwich layer 2, plastify to extrude through extruder and obtain; Melt index is 6-8g/10min (test condition: standard bore 2.095mm, 190 ℃ of temperature, load 2.16kg); Wherein the second third elastomeric ethylene contents is 10%, and the weight ratio of second third elastomer and Noblen is 30 ︰ 100, selects for use propylene-ethylene random copolymer to make corona layer 3; Melt index is 6-8g/10min (test condition: standard bore 2.095mm, 230 ℃ of temperature, load 2.16kg); Hot sealing layer is extruded 220 ℃ of plasticizings, and sandwich layer and corona layer plastify under 230 ℃ of conditions and extrude, then through a T die casting film-forming; The casting roller chilling temperature is 23 ℃, with the speed rolling of 63m/min, the corona spark is carried out on the surface of corona layer handle again; Make its corona tension force become 46mN/m, resulting soft type half Tropical cooking film gross thickness is 60 μ m, and wherein core layer thickness is 38 μ m.
Soft type half Tropical cooking film to preparing seals experiment, and the result is as shown in Figure 2.
Embodiment 4
Soft type half Tropical cooking film, its structure such as Fig. 1 are said, comprise hot sealing layer 1, sandwich layer 2 and corona layer 3, select for use propylene copolymer to make hot sealing layer 1; Its melt index is 8-12g/10min (test condition: standard bore 2.095mm, 230 ℃ of temperature, load 2.16kg); Extrude through extruder plasticizing at last and obtain film, select for use second third elastomer and Noblen blend to make sandwich layer 2, plastify to extrude through extruder and obtain; Melt index is 6-8g/10min (test condition: standard bore 2.095mm, 190 ℃ of temperature, load 2.16kg); Wherein the second third elastomeric ethylene contents is 25%, and the weight ratio of second third elastomer and Noblen is 15 ︰ 100, selects for use propylene-ethylene random copolymer to make corona layer 3; Melt index is 6-8g/10min (test condition: standard bore 2.095mm, 230 ℃ of temperature, load 2.16kg); Hot sealing layer is extruded 240 ℃ of plasticizings, and sandwich layer and corona layer plastify under 250 ℃ of conditions and extrude, then through a T die casting film-forming; The casting roller chilling temperature is 27 ℃, with the speed rolling of 63m/min, the corona spark is carried out on the surface of corona layer handle again; Make its corona tension force become 46mN/m, resulting soft type half Tropical cooking film gross thickness is 60 μ m, and wherein core layer thickness is 38 μ m.
Soft type half Tropical cooking film to preparing seals experiment, and the result is as shown in Figure 2.
Second third elastomer has the high-impact ability, and with easy mixing of polypropylene satisfying requirement of the present invention.Current thin film production all is to adopt co-extrusion technology, after promptly resin plastifies through different extruders, through a die head film extrusion.The inventor discovers the masterbatch made from polypropylene and second third elastomer, adds to by a certain percentage in the soft type half Tropical cooking film sandwich layer, and the impact resistance of film is sharply promoted, and does not have influence on the heat-sealing and the corona treatment of film again.But the ethylene contents in second third elastomer is not moderate or second third elastomer in sandwich layer with the polypropylene homopolymer mixed proportion when incorrect, the film resistance to impact of producing can meet the demands or because film is crossed soft can't production.To the problems referred to above, inventor's further investigation and test are repeatedly found to adopt above-mentioned prescription, can improve the impact resistance of film, have also improved the productibility of film.
Comparative example 1
Soft type half Tropical cooking film, its structure such as Fig. 1 are said, comprise hot sealing layer 1, sandwich layer 2 and corona layer 3, select for use propylene copolymer to make hot sealing layer 1; Its melt index is 8-12g/10min (test condition: standard bore 2.095mm, 230 ℃ of temperature, load 2.16kg); Extrude through extruder plasticizing at last and obtain film, select for use second third elastomer and Noblen blend to make sandwich layer 2, plastify to extrude through extruder and obtain; Melt index is 6-8g/10min (test condition: standard bore 2.095mm, 190 ℃ of temperature, load 2.16kg); The second third elastomeric ethylene contents 21% wherein, the part by weight 20:100 of second third elastomer and Noblen selects for use propylene-ethylene random copolymer to make corona layer 3; Melt index is 6-8g/10min (test condition: standard bore 2.095mm, 230 ℃ of temperature, load 2.16kg); Hot sealing layer is extruded 230 ℃ of plasticizings, and sandwich layer and corona layer plastify under 240 ℃ of conditions and extrude, then through a T die casting film-forming; The casting roller chilling temperature is 25 ℃, with the speed rolling of 63m/min, the corona spark is carried out on the surface of corona layer handle again; Make its corona tension force become 46mN/m, resulting soft type half Tropical cooking film gross thickness is 60 μ m, and wherein core layer thickness is 38 μ m.
Soft type half Tropical cooking film to preparing seals experiment, and the result is as shown in Figure 2.
Related various chemical names such as polypropylene copolymer, Noblen, propylene-ethylene random copolymer etc. are commercial commodity in the literary composition.
Claims (7)
1. soft type half Tropical cooking film is characterized in that, this soft type half Tropical cooking film comprises hot sealing layer, sandwich layer and the corona layer that connects successively; Described hot sealing layer is a polypropylene copolymer; Plastify under 220 ~ 240 ℃ of conditions through extruder plasticizing and to extrude, described sandwich layer is the adding second third elastomeric Noblen, plastifies under 230 ~ 250 ℃ of conditions through the sandwich layer extruder and extrudes; The material of described corona layer is a propylene-ethylene random copolymer; Plastify under 230 ~ 250 ℃ of conditions through extruder and to extrude,, and the corona spark is carried out on the surface of corona layer handle then through a T die casting film-forming.
2. soft type half Tropical cooking film according to claim 1 is characterized in that, the thickness of described soft type half Tropical cooking film is 40-80 μ m.
3. soft type half Tropical cooking film according to claim 2 is characterized in that, hot sealing layer thickness is 5 ~ 20 μ m, and core layer thickness is 30 ~ 50 μ m, and the corona layer thickness is 5 ~ 20 μ m.
4. soft type half Tropical cooking film according to claim 1; It is characterized in that; In the described adding second third elastomeric Noblen, the second third elastomeric ethylene contents is 10-25%, and the weight ratio of second third elastomer and Noblen is (10-30) ︰ 100.
5. the preparation method of soft type half Tropical cooking film is characterized in that, this method may further comprise the steps: select for use polypropylene copolymer to make hot sealing layer, its melt index is 8-12g/10min, under 220 ~ 240 ℃ of conditions, plastifies and extrudes; Select for use to add the second third elastomeric Noblen manufacturing sandwich layer, melt index is 6-8g/10min, under 230 ~ 250 ℃ of conditions, plastifies and extrudes; Select for use propylene-ethylene random copolymer to make the corona layer; Melt index is 6-8g/10min, hot sealing layer is extruded 230 ~ 250 ℃ of plasticizings, then through a T die casting film-forming; And the corona spark is carried out on the surface of corona layer handle, the soft type half Tropical cooking film gross thickness that obtains is 40-80 μ m.
6. the preparation method of soft type half Tropical cooking film according to claim 5; It is characterized in that; In the described adding second third elastomeric Noblen, the second third elastomeric ethylene contents is 10-30%, and the weight ratio of second third elastomer and Noblen is (10-30) ︰ 100.
7. the preparation method of soft type half Tropical cooking film according to claim 6 is characterized in that, hot sealing layer thickness is 5 ~ 20 μ m, and core layer thickness is 30 ~ 50 μ m, and the corona layer thickness is 5 ~ 20 μ m.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107264957A (en) * | 2017-07-07 | 2017-10-20 | 贺电 | A kind of food packaging barbecue bag |
| CN108943948A (en) * | 2018-07-10 | 2018-12-07 | 上海大汇塑业有限公司 | A kind of wine cellar liner cast polypropylene film and preparation method thereof |
| CN110873666A (en) * | 2019-12-19 | 2020-03-10 | 江苏博生医用新材料股份有限公司 | Method for evaluating low-temperature performance of infusion membrane |
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| EP1182142A1 (en) * | 1999-09-10 | 2002-02-27 | Ishida Co., Ltd. | Food-packaging bag, method of food packaging, and use of laminated film as food-packaging bag |
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| CN1214064A (en) * | 1996-03-21 | 1999-04-14 | 森格沃尔德·维帕克尤恩根有限责任公司 | Multilayered sheet, process for prodn. thereof and use thereof |
| EP1182142A1 (en) * | 1999-09-10 | 2002-02-27 | Ishida Co., Ltd. | Food-packaging bag, method of food packaging, and use of laminated film as food-packaging bag |
| CN101293411A (en) * | 2007-04-27 | 2008-10-29 | 阎家骥 | Multi-layer co-extrusion CPP toughening base material film and preparing technique thereof |
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| CN108943948A (en) * | 2018-07-10 | 2018-12-07 | 上海大汇塑业有限公司 | A kind of wine cellar liner cast polypropylene film and preparation method thereof |
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