CN105128482A - Degradable low-temperature-resistant three-layer co-extrusion blow-molding composite polyethylene film and preparing method thereof - Google Patents
Degradable low-temperature-resistant three-layer co-extrusion blow-molding composite polyethylene film and preparing method thereof Download PDFInfo
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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
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
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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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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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
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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
- 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
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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
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
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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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
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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
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/30—Fillers, e.g. particles, powders, beads, flakes, spheres, chips
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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
- B32B2323/00—Polyalkenes
- B32B2323/04—Polyethylene
- B32B2323/046—LDPE, i.e. low density polyethylene
-
- 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
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
-
- 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
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
The invention relates to a degradable low-temperature-resistant three-layer co-extrusion blow-molding composite polyethylene film and a preparing method thereof, and belongs to the technical field of films. The degradable low-temperature-resistant three-layer co-extrusion blow-molding polyethylene film comprises an inner heat seal layer, an outer corona layer and a middle core layer which form the degradable three-layer co-extrusion blow-molding polyethylene film in a co-extrusion mode. According to the degradable low-temperature-resistant three-layer co-extrusion blow-molding polyethylene film, as a raw material component capable of promoting film degradation is added into all composite layers, and the three raw materials on the three layers are co-extruded at the appropriate temperature, the composite polyethylene film is endowed with excellent biodegradability, low-temperature resistance and physical properties.
Description
Technical field
The invention belongs to thin film technique field, be specifically related to a kind of degradable low temperature resistant triple coextrusion blow laminating polyethylene film and preparation method thereof.
Background technology
Multi-layer co-extruded casting films is extruded and is referred to and utilize two or more extruders by the compound die head of a multiple flow passages in two or more different plastics, converges the laminated film producing sandwich construction.Adopt the method can produce the film of various different materials, there is very high machining accuracy, especially when making semicrystalline thermoplastic, this processing method can play the performance of machined material fully, obtained casting films has excellent optical property and the thickness uniformity, is conducive to producing in enormous quantities; In addition the film utilizing the method to make has the good transparency and glossiness, and has good mechanical property.
At present, the degradable laminating polyethylene film great majority of domestic excellent performance on the market rely on import and obtain, therefore to the research of degradable three-layer co-extruded laminating polyethylene film, there is very large social effect and economic worth, and the quality of degradability is main relevant with the raw material that laminating polyethylene film uses when producing, the use of raw material and proportioning serve and important effect.
Therefore, a kind of degradable low temperature resistant triple coextrusion blow laminating polyethylene film of excellent performance has become those skilled in the art's technical barrier urgently to be resolved hurrily.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, and a kind of degradable low temperature resistant triple coextrusion blow laminating polyethylene film and preparation method thereof is provided, this degradable low temperature resistant triple coextrusion blow laminating polyethylene film has good barrier, lower temperature resistance and stronger physical property, also has excellent degradability.
The present invention adopts following technical scheme:
Degradable low temperature resistant triple coextrusion blow laminating polyethylene film, comprises internal layer hot sealing layer, outer corona layer and middle level sandwich layer, and described internal layer hot sealing layer, outer corona layer and middle level sandwich layer co-extrusion form the three-layer co-extruded laminating polyethylene film of described degradable;
Wherein, described internal layer hot sealing layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 20-30 part, homopolymerization type polypropylene 5-8 part, PLA 8-11 part, polyethylene maleic anhydride copolymer 2-5 part, polyvinyl alcohol 0.5-2.5 part, ferric stearate 2-6 part, starch 4-9 part; Described outer corona layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 20-25 part, block copolymerization polypropylene 2-4 part, maleic anhydride inoculated polypropylene 0.8-2.1 part, 2,2,4-trimethyl-1,3-pentanediol mono isobutyrate 0.1-0.3 part, shitosan 2-8 part, ferric stearate 2-5 part, starch 5-10 part; Described middle level sandwich layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 20-25 part, polyethylene maleic anhydride copolymer 2-6 part, shitosan 3-6 part, lignin 0.5-1 part.
Further, described degradable low temperature resistant triple coextrusion blow laminating polyethylene film, wherein said internal layer hot sealing layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 25 parts, homopolymerization type polypropylene 6 parts, PLA 10 parts, polyethylene maleic anhydride copolymer 4 parts, polyvinyl alcohol 1.8 parts, ferric stearate 4 parts, starch 6 parts; Described outer corona layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 22 parts, block copolymerization polypropylene 3 parts, maleic anhydride inoculated polypropylene 1.5 parts, 2,2,4-trimethyl-1,3-pentanediol mono isobutyrate 0.2 part, shitosan 6 parts, ferric stearate 3 parts, starch 6 parts; Described middle level sandwich layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 22 parts, polyethylene maleic anhydride copolymer 4 parts, shitosan 5 parts, 0.7 part, lignin.
The preparation method of described degradable low temperature resistant triple coextrusion blow laminating polyethylene film, step is as follows: internal layer hot sealing layer material: according to described quality proportioning, after metallocene linear low density polyethylene, homopolymerization type polypropylene, PLA, polyethylene maleic anhydride copolymer, polyvinyl alcohol, ferric stearate and starch blending, mixing melting at 180-250 DEG C; Outer corona layer material: according to described quality proportioning, by metallocene linear low density polyethylene, block copolymerization polypropylene, maleic anhydride inoculated polypropylene, 2,2,4-trimethyl-1, after 3-pentanediol mono isobutyrate, shitosan, ferric stearate and starch blending, mixing melting at 180-250 DEG C; Middle level core material: according to described quality proportioning, mixes metallocene linear low density polyethylene, polyethylene maleic anhydride copolymer, shitosan and lignin, mixing melting at 190-230 DEG C; After by internal layer hot sealing layer material, outer corona layer material and middle level core material by the three-layer co-extruded blow molding of blow moulding machine, obtain described degradable low temperature resistant triple coextrusion blow laminating polyethylene film.
Further, the preparation method of described degradable low temperature resistant triple coextrusion blow laminating polyethylene film, wherein, the mixing melting at 200 DEG C of described internal layer hot sealing layer.
Further, the preparation method of described degradable low temperature resistant triple coextrusion blow laminating polyethylene film, wherein, the mixing melting at 220 DEG C of described outer corona layer.
Further, the preparation method of described degradable low temperature resistant triple coextrusion blow laminating polyethylene film, wherein, the mixing melting at 215 DEG C of described middle level sandwich layer.
The present invention compared with prior art, its beneficial effect is: degradable low temperature resistant triple coextrusion blow laminating polyethylene film of the present invention by adding the raw material components that can promote film degradation in each layer composite bed, again at suitable temperature by three layers of composite bed co-extrusion, not give only the biodegradability of laminating polyethylene film excellence of the present invention, also make it have excellent resistance to low temperature and physical property; Degradable low temperature resistant triple coextrusion blow laminating polyethylene film preparation method of the present invention is simple and easy to do, not only can be widely used in the packaging of food, in addition due to its good resistance to low temperature, makes it normally can use under low temperature environment at subzero 25 DEG C.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example only for illustration of the present invention, and should not be considered as limiting scope of the present invention.
embodiment 1
Degradable low temperature resistant triple coextrusion blow laminating polyethylene film, comprises internal layer hot sealing layer, outer corona layer and middle level sandwich layer, and described internal layer hot sealing layer, outer corona layer and middle level sandwich layer co-extrusion form the three-layer co-extruded laminating polyethylene film of described degradable;
Wherein said internal layer hot sealing layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 25 parts, homopolymerization type polypropylene 6 parts, PLA 10 parts, polyethylene maleic anhydride copolymer 4 parts, polyvinyl alcohol 1.8 parts, ferric stearate 4 parts, starch 6 parts; Described outer corona layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 22 parts, block copolymerization polypropylene 3 parts, maleic anhydride inoculated polypropylene 1.5 parts, 2,2,4-trimethyl-1,3-pentanediol mono isobutyrate 0.2 part, shitosan 6 parts, ferric stearate 3 parts, starch 6 parts; Described middle level sandwich layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 22 parts, polyethylene maleic anhydride copolymer 4 parts, shitosan 5 parts, 0.7 part, lignin.
The preparation method of described degradable low temperature resistant triple coextrusion blow laminating polyethylene film, step is as follows: internal layer hot sealing layer material: according to described quality proportioning, after metallocene linear low density polyethylene, homopolymerization type polypropylene, PLA, polyethylene maleic anhydride copolymer, polyvinyl alcohol, ferric stearate and starch blending, mixing melting at 200 DEG C; Outer corona layer material: according to described quality proportioning, by metallocene linear low density polyethylene, block copolymerization polypropylene, maleic anhydride inoculated polypropylene, 2,2,4-trimethyls-1, after 3-pentanediol mono isobutyrate, shitosan, ferric stearate and starch blending, mixing melting at 220 DEG C; Middle level core material: according to described quality proportioning, mixes metallocene linear low density polyethylene, polyethylene maleic anhydride copolymer, shitosan and lignin, mixing melting at 215 DEG C; After by internal layer hot sealing layer material, outer corona layer material and middle level core material by the three-layer co-extruded blow molding of blow moulding machine, obtain described degradable low temperature resistant triple coextrusion blow laminating polyethylene film.
embodiment 2
Degradable low temperature resistant triple coextrusion blow laminating polyethylene film, comprises internal layer hot sealing layer, outer corona layer and middle level sandwich layer, and described internal layer hot sealing layer, outer corona layer and middle level sandwich layer co-extrusion form the three-layer co-extruded laminating polyethylene film of described degradable;
Wherein, described internal layer hot sealing layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 20 parts, homopolymerization type polypropylene 5 parts, PLA 8 parts, polyethylene maleic anhydride copolymer 2 parts, polyvinyl alcohol 0.5 part, ferric stearate 2 parts, starch 4 parts; Described outer corona layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 20 parts, block copolymerization polypropylene 2 parts, maleic anhydride inoculated polypropylene 0.8 part, 2,2,4-trimethyl-1,3-pentanediol mono isobutyrate 0.1 part, shitosan 2 parts, ferric stearate 2 parts, starch 5 parts; Described middle level sandwich layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 20 parts, polyethylene maleic anhydride copolymer 2 parts, shitosan 3 parts, 0.5 part, lignin.
The preparation method of described degradable low temperature resistant triple coextrusion blow laminating polyethylene film, step is as follows: internal layer hot sealing layer material: according to described quality proportioning, after metallocene linear low density polyethylene, homopolymerization type polypropylene, PLA, polyethylene maleic anhydride copolymer, polyvinyl alcohol, ferric stearate and starch blending, mixing melting at 180 DEG C; Outer corona layer material: according to described quality proportioning, by metallocene linear low density polyethylene, block copolymerization polypropylene, maleic anhydride inoculated polypropylene, 2,2,4-trimethyls-1, after 3-pentanediol mono isobutyrate, shitosan, ferric stearate and starch blending, mixing melting at 180 DEG C; Middle level core material: according to described quality proportioning, mixes metallocene linear low density polyethylene, polyethylene maleic anhydride copolymer, shitosan and lignin, mixing melting at 190 DEG C; After by internal layer hot sealing layer material, outer corona layer material and middle level core material by the three-layer co-extruded blow molding of blow moulding machine, obtain described degradable low temperature resistant triple coextrusion blow laminating polyethylene film.
embodiment 3
Degradable low temperature resistant triple coextrusion blow laminating polyethylene film, comprises internal layer hot sealing layer, outer corona layer and middle level sandwich layer, and described internal layer hot sealing layer, outer corona layer and middle level sandwich layer co-extrusion form the three-layer co-extruded laminating polyethylene film of described degradable;
Wherein, described internal layer hot sealing layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 30 parts, homopolymerization type polypropylene 8 parts, PLA 11 parts, polyethylene maleic anhydride copolymer 5 parts, polyvinyl alcohol 2.5 parts, ferric stearate 6 parts, starch 9 parts; Described outer corona layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 20-25 part, block copolymerization polypropylene 4 parts, maleic anhydride inoculated polypropylene 2.1 parts, 2,2,4-trimethyl-1,3-pentanediol mono isobutyrate 0.3 part, shitosan 8 parts, ferric stearate 5 parts, starch 10 parts; Described middle level sandwich layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 25 parts, polyethylene maleic anhydride copolymer 6 parts, shitosan 6 parts, 1 part, lignin.
The preparation method of described degradable low temperature resistant triple coextrusion blow laminating polyethylene film, step is as follows: internal layer hot sealing layer material: according to described quality proportioning, after metallocene linear low density polyethylene, homopolymerization type polypropylene, PLA, polyethylene maleic anhydride copolymer, polyvinyl alcohol, ferric stearate and starch blending, mixing melting at 250 DEG C; Outer corona layer material: according to described quality proportioning, by metallocene linear low density polyethylene, block copolymerization polypropylene, maleic anhydride inoculated polypropylene, 2,2,4-trimethyls-1, after 3-pentanediol mono isobutyrate, shitosan, ferric stearate and starch blending, mixing melting at 250 DEG C; Middle level core material: according to described quality proportioning, mixes metallocene linear low density polyethylene, polyethylene maleic anhydride copolymer, shitosan and lignin, mixing melting at 230 DEG C; After by internal layer hot sealing layer material, outer corona layer material and middle level core material by the three-layer co-extruded blow molding of blow moulding machine, obtain described degradable low temperature resistant triple coextrusion blow laminating polyethylene film.
To the embodiment of the present invention 1 to 3 gained degradable low temperature resistant triple coextrusion blow laminating polyethylene film Performance Detection, wherein, degradation rate adopts plastic film mulch experiment to test, respectively the embodiment of the present invention 1 to 3 gained degradable low temperature resistant triple coextrusion blow laminating polyethylene film is carried out plastic film mulch experiment in Quanzhou Region, 8 weeks rear films start to occur breaking, after 12 months, to remain film amount and initially to use the ratio of film amount to calculate degradation rate, test result is as following table 1:
Table 1 Performance Detection is reported
| Test event | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Transverse tensile strength, MPa | 45 | 44 | 43 |
| Longitudinal tensile strength, MPa | 49 | 48 | 48 |
| Cross directional stretch elongation at break, % | 180 | 175 | 178 |
| Longitudinal stretching elongation at break, % | 205 | 200 | 202 |
| Degradation rate, % | 85 | 82 | 83 |
The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (6)
1. degradable low temperature resistant triple coextrusion blow laminating polyethylene film, it is characterized in that, comprise internal layer hot sealing layer, outer corona layer and middle level sandwich layer, described internal layer hot sealing layer, outer corona layer and middle level sandwich layer co-extrusion form the three-layer co-extruded laminating polyethylene film of described degradable;
Wherein, described internal layer hot sealing layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 20-30 part, homopolymerization type polypropylene 5-8 part, PLA 8-11 part, polyethylene maleic anhydride copolymer 2-5 part, polyvinyl alcohol 0.5-2.5 part, ferric stearate 2-6 part, starch 4-9 part; Described outer corona layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 20-25 part, block copolymerization polypropylene 2-4 part, maleic anhydride inoculated polypropylene 0.8-2.1 part, 2,2,4-trimethyl-1,3-pentanediol mono isobutyrate 0.1-0.3 part, shitosan 2-8 part, ferric stearate 2-5 part, starch 5-10 part; Described middle level sandwich layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 20-25 part, polyethylene maleic anhydride copolymer 2-6 part, shitosan 3-6 part, lignin 0.5-1 part.
2. degradable low temperature resistant triple coextrusion blow laminating polyethylene film according to claim 1, it is characterized in that, described internal layer hot sealing layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 25 parts, homopolymerization type polypropylene 6 parts, PLA 10 parts, polyethylene maleic anhydride copolymer 4 parts, polyvinyl alcohol 1.8 parts, ferric stearate 4 parts, starch 6 parts; Described outer corona layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 22 parts, block copolymerization polypropylene 3 parts, maleic anhydride inoculated polypropylene 1.5 parts, 2,2,4-trimethyl-1,3-pentanediol mono isobutyrate 0.2 part, shitosan 6 parts, ferric stearate 3 parts, starch 6 parts; Described middle level sandwich layer comprises the following component according to mass fraction meter: metallocene linear low density polyethylene 22 parts, polyethylene maleic anhydride copolymer 4 parts, shitosan 5 parts, 0.7 part, lignin.
3. the preparation method of degradable low temperature resistant triple coextrusion blow laminating polyethylene film according to claim 1, it is characterized in that, step is as follows: internal layer hot sealing layer material: according to described quality proportioning, after metallocene linear low density polyethylene, homopolymerization type polypropylene, PLA, polyethylene maleic anhydride copolymer, polyvinyl alcohol, ferric stearate and starch blending, mixing melting at 180-250 DEG C; Outer corona layer material: according to described quality proportioning, by metallocene linear low density polyethylene, block copolymerization polypropylene, maleic anhydride inoculated polypropylene, 2,2,4-trimethyl-1, after 3-pentanediol mono isobutyrate, shitosan, ferric stearate and starch blending, mixing melting at 180-250 DEG C; Middle level core material: according to described quality proportioning, mixes metallocene linear low density polyethylene, polyethylene maleic anhydride copolymer, shitosan and lignin, mixing melting at 190-230 DEG C; After by internal layer hot sealing layer material, outer corona layer material and middle level core material by the three-layer co-extruded blow molding of blow moulding machine, obtain described degradable low temperature resistant triple coextrusion blow laminating polyethylene film.
4. the preparation method of degradable low temperature resistant triple coextrusion blow laminating polyethylene film according to claim 3, is characterized in that, the mixing melting at 200 DEG C of described internal layer hot sealing layer.
5. the preparation method of degradable low temperature resistant triple coextrusion blow laminating polyethylene film according to claim 3, is characterized in that, the mixing melting at 220 DEG C of described outer corona layer.
6. the preparation method of degradable low temperature resistant triple coextrusion blow laminating polyethylene film according to claim 3, is characterized in that, the mixing melting at 215 DEG C of described middle level sandwich layer.
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| CN105830827A (en) * | 2016-03-31 | 2016-08-10 | 太仓市新华粮食生产专业合作社 | High strength degradable agricultural film |
| CN108299726A (en) * | 2018-02-11 | 2018-07-20 | 海南宜鑫环保材料有限公司 | A kind of degradable biological film and preparation method thereof |
| CN109397809A (en) * | 2018-10-29 | 2019-03-01 | 昆山金盟塑料薄膜有限公司 | A kind of degradable composite membrane and preparation method thereof |
| CN112238666A (en) * | 2020-10-16 | 2021-01-19 | 安徽省长荣新材料科技有限公司 | Ultralow temperature-resistant polyethylene functional film and preparation method thereof |
| CN114474650A (en) * | 2021-12-23 | 2022-05-13 | 镇江现代包装有限公司 | Preparation process of green environment-friendly packaging film |
| CN114834171A (en) * | 2022-04-13 | 2022-08-02 | 福建省凯安包装科技有限公司 | Environment-friendly printing process of polyethylene packaging material |
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| CN101758653A (en) * | 2009-11-10 | 2010-06-30 | 湖北富思特材料科技有限公司 | Biaxial stretched polyethylene degradable film |
| US20130004760A1 (en) * | 2011-07-01 | 2013-01-03 | Salvatore Pellingra | Biodegradable moisture barrier film |
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