CN116285061A - High-flatness ultra-thin low-pressure film - Google Patents
High-flatness ultra-thin low-pressure film Download PDFInfo
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- CN116285061A CN116285061A CN202310177413.6A CN202310177413A CN116285061A CN 116285061 A CN116285061 A CN 116285061A CN 202310177413 A CN202310177413 A CN 202310177413A CN 116285061 A CN116285061 A CN 116285061A
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- montmorillonite
- pressure film
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical class O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 127
- 238000002156 mixing Methods 0.000 claims abstract description 66
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 63
- 239000003607 modifier Substances 0.000 claims abstract description 56
- 239000002994 raw material Substances 0.000 claims abstract description 41
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims abstract description 35
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 30
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 28
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 28
- 239000004014 plasticizer Substances 0.000 claims abstract description 25
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 24
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 24
- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 claims abstract description 24
- WBYWAXJHAXSJNI-VOTSOKGWSA-M .beta-Phenylacrylic acid Natural products [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 claims abstract description 23
- 229930016911 cinnamic acid Natural products 0.000 claims abstract description 23
- 235000013985 cinnamic acid Nutrition 0.000 claims abstract description 23
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 23
- -1 pentaerythritol ester Chemical class 0.000 claims abstract description 23
- WBYWAXJHAXSJNI-SREVYHEPSA-N Cinnamic acid Chemical compound OC(=O)\C=C/C1=CC=CC=C1 WBYWAXJHAXSJNI-SREVYHEPSA-N 0.000 claims abstract description 22
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 15
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims description 33
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 28
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 24
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical group C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 claims description 18
- 229920005610 lignin Polymers 0.000 claims description 17
- ZTOKUMPYMPKCFX-CZNUEWPDSA-N (E)-17-[(2R,3R,4S,5S,6R)-6-(acetyloxymethyl)-3-[(2S,3R,4S,5S,6R)-6-(acetyloxymethyl)-3,4,5-trihydroxyoxan-2-yl]oxy-4,5-dihydroxyoxan-2-yl]oxyoctadec-9-enoic acid Chemical compound OC(=O)CCCCCCC/C=C/CCCCCCC(C)O[C@@H]1O[C@H](COC(C)=O)[C@@H](O)[C@H](O)[C@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](COC(C)=O)O1 ZTOKUMPYMPKCFX-CZNUEWPDSA-N 0.000 claims description 15
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 15
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 15
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 15
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000155 melt Substances 0.000 claims description 13
- 239000004593 Epoxy Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000001384 succinic acid Substances 0.000 claims description 12
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 11
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 11
- SASYSVUEVMOWPL-NXVVXOECSA-N decyl oleate Chemical compound CCCCCCCCCCOC(=O)CCCCCCC\C=C/CCCCCCCC SASYSVUEVMOWPL-NXVVXOECSA-N 0.000 claims description 11
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 11
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 11
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 82
- 238000002360 preparation method Methods 0.000 description 73
- 239000012528 membrane Substances 0.000 description 12
- 125000005456 glyceride group Chemical group 0.000 description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229940049964 oleate Drugs 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application relates to the technical field of films, and particularly discloses a high-flatness ultrathin low-pressure film. The high-flatness ultrathin low-pressure film comprises the following raw materials in parts by weight: 60-100 parts of high-density polyethylene, 8-12 parts of linear low-density polyethylene, 5-15 parts of inorganic salt, 7-9 parts of modified montmorillonite, 1-2 parts of plasticizer and 0.1-0.5 part of tackifier; the modified montmorillonite is prepared from the following raw materials in parts by weight: 16-20 parts of montmorillonite, 1-3 parts of cinnamic acid, 2-4 parts of succinic acid, 8-12 parts of modifier, 1-2 parts of pentaerythritol ester and 20-40 parts of water; the inorganic salt is prepared by mixing nano calcium carbonate and nano barium sulfate in a mass ratio of 2-6:5; the low-pressure film has the advantages of simple formula, strict proportion, high flatness, excellent mechanical property and wide application prospect.
Description
Technical Field
The present application relates to the field of film technology, and more particularly, to high flatness ultra thin low pressure films.
Background
Plastic films are films made of polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins for packaging and for use as a film coating. The plastic package and the plastic package product have larger and larger share in the market, are widely applied to the fields of food, medicine, chemical industry and the like, and bring great convenience for people's life.
The plastic film is prepared from polyethylene, and can be divided into a high-pressure film and a low-pressure film according to different types of polyethylene; the raw material of the high-pressure film is low-density polyethylene (LDPE), the raw material of the low-pressure film is high-density polyethylene (HDPE), the tensile strength of the low-density polyethylene is smaller than that of the high-density polyethylene, but the impact strength is larger than that of the high-density polyethylene, so that the high-pressure film and the low-pressure film have respective defects. Particularly in the preparation process of the low-pressure film, the surface of the low-pressure film is often uneven, and the thickness of the low-pressure film is difficult to reach an ultrathin level on the basis of ensuring the strength of the low-pressure film, so that the low-pressure film is limited to be widely applied to a great extent. Therefore, it is highly desirable to provide a high-flatness ultra-thin low-pressure film to expand the application range of the low-pressure film.
Disclosure of Invention
In order to solve the problem that the flatness of the existing low-pressure film is low, the application provides a high-flatness ultrathin low-pressure film.
The application provides a high-flatness ultrathin low-pressure film, which adopts the following technical scheme:
the high-flatness ultrathin low-pressure film comprises the following raw materials in parts by weight: 60-100 parts of high-density polyethylene, 8-12 parts of linear low-density polyethylene, 5-15 parts of inorganic salt, 7-9 parts of modified montmorillonite, 1-2 parts of plasticizer and 0.1-0.5 part of tackifier;
the modified montmorillonite is prepared from the following raw materials in parts by weight: 16-20 parts of montmorillonite, 1-3 parts of cinnamic acid, 2-4 parts of succinic acid, 8-12 parts of modifier, 1-2 parts of pentaerythritol ester and 20-40 parts of water.
Through adopting above-mentioned technical scheme, the raw materials of the ultra-thin low pressure membrane of high roughness of this application include high density polyethylene, linear low density polyethylene, inorganic salt, modified montmorillonite, plasticizer, tackifier, and control the weight portion of each component in certain limit, interact between each component, form the network form macromolecule for the low pressure membrane not only smooth surface is leveled, has excellent mechanical properties moreover. In addition, the modified montmorillonite is prepared from montmorillonite, cinnamic acid, succinic acid, a modifier, pentaerythritol ester and other raw materials, so that the modified montmorillonite has good dispersibility and compatibility, and therefore, in the preparation process of the low-pressure film, the addition of the modified montmorillonite can reduce the difference of shrinkage rates of all components in different directions, reduce the buckling deformation of the low-pressure film, weaken the bowing effect of the low-pressure film and remarkably improve the flatness of the low-pressure film; simultaneously, the mechanical property and the ageing resistance of the low-pressure film are improved to a great extent; when the low-pressure film is very thin, the low-pressure film can still keep good mechanical properties, so that the low-pressure film has wide market prospect.
Preferably, the high density polyethylene has a density of 0.950 to 0.962g/cm 3 The melt index is 3-8g/10min; the linear low density polyethylene has a density of 0.920 to 0.930g/cm 3 The melt index is 1.5-4g/10min.
Through adopting above-mentioned technical scheme, high density polyethylene has excellent wearability, electrical insulation, toughness and cold resistance, and linear low density polyethylene can provide good hardness and creep property, and this application is with density and the melt index control of high density polyethylene and linear low density polyethylene in certain within range, can combine the advantage of two fully for the toughness and the intensity of the low pressure membrane of this application reach the balance, have enlarged the application scope of low pressure membrane.
Preferably, the inorganic salt is obtained by mixing nano calcium carbonate and nano barium sulfate in a mass ratio of 2-6:5.
Through adopting above-mentioned technical scheme, the inorganic salt of this application is mixed by nano calcium carbonate and nano barium sulfate of certain mass ratio and gets, and both synergies, has good compatibility with other each component, can effectively improve high density polyethylene and linear low density polyethylene's rheological property for the low pressure membrane is more level and smooth, and tensile strength, tensile strength have also obtained showing and have improved, have provided excellent mechanical properties for ultra-thin low pressure membrane.
Preferably, the modified montmorillonite is prepared by the following method:
s11, uniformly mixing montmorillonite and pentaerythritol ester, grinding for 2-3 hours, and calcining for 1-2 hours at 320-380 ℃ to obtain calcined montmorillonite;
s12, adding the calcined montmorillonite, cinnamic acid and succinic acid obtained in the step S11 into water, and performing ultrasonic reaction for 0.5-1h at 60-80 ℃ to obtain acidified montmorillonite;
s13, adding a modifier into the acidified montmorillonite obtained in the step S12, regulating the pH value to 4-5, heating to 60-70 ℃, reacting for 1-2h under the protection of nitrogen under the condition of heat preservation and stirring, filtering, washing and drying to obtain the modified montmorillonite.
By adopting the technical scheme, the montmorillonite is firstly added with the pentaerythritol ester of the grinding aid, and is ground, so that the montmorillonite is ground more fully, and then the calcined montmorillonite is obtained; acidifying calcined montmorillonite by cinnamic acid and succinic acid, and acidifying the calcined montmorillonite by interaction of cinnamic acid and succinic acid to enable a large number of active groups to appear on the surface of the montmorillonite, and finally treating the calcined montmorillonite by a modifier to obtain modified montmorillonite; in the preparation process of the modified montmorillonite, various process parameters are controlled, so that the modified montmorillonite has excellent compatibility and dispersibility, and is added into a low-pressure membrane, so that the components are mixed more uniformly and combined more tightly, and the uniformity of the surface of the low-pressure membrane is improved.
Preferably, the modifier comprises the following raw materials in parts by weight: 8-12 parts of nano titanium dioxide, 2-4 parts of lignin, 1-2 parts of polyvinylpyrrolidone, 6-8 parts of a silane coupling agent, 0.5-1 part of sophorolipid, 11-15 parts of ethanol and 20-30 parts of water.
Preferably, the modifier is prepared by the following method:
adding nano titanium dioxide, lignin and sophorolipid into water, and uniformly stirring to obtain a mixture A;
adding a silane coupling agent and polyvinylpyrrolidone into ethanol, and uniformly stirring to obtain a mixture B;
and (3) carrying out ultrasonic mixing on the mixture A and the mixture B to obtain the modifier.
Through adopting above-mentioned technical scheme, the application adopts raw materials such as nanometer titanium dioxide, lignin, polyvinylpyrrolidone, silane coupling agent, sophorolipid to prepare the modifier, adopts the modifier to handle acidized montmorillonite for combine with the chemical bond between nanometer titanium dioxide, lignin and the acidized montmorillonite, showing the modified effect that improves the montmorillonite, improved the compatibility of modified montmorillonite, make modified montmorillonite and other components mix more evenly, make the roughness of low pressure membrane obtain very big improvement.
Preferably, the silane coupling agent is obtained by mixing vinyl triethoxysilane and vinyl tri (beta-methoxyethoxy) silane in a mass ratio of 4-8:5.
By adopting the technical scheme, the silane coupling agent is prepared by mixing vinyl triethoxysilane and vinyl tri (beta-methoxyethoxy) silane in a certain mass ratio, and the vinyl triethoxysilane and the vinyl tri (beta-methoxyethoxy) silane are interacted with each other, so that nano titanium dioxide, lignin and acidified montmorillonite can be tightly combined, and both contain vinyl, the compatibility between the modified montmorillonite and high-density polyethylene and the compatibility between the modified montmorillonite and linear low-density polyethylene can be improved, and the surface of a low-pressure film is promoted to be smoother and flatter.
Preferably, the plasticizer is obtained by mixing epoxy decyl oleate and white oil in a mass ratio of 3-6:4.
Through adopting above-mentioned technical scheme, the plasticizer of this application is obtained by mixing epoxy decyl oleate of certain quality and white oil, and both cooperate the synergy, is favorable to reducing melting temperature and melt viscosity, improves low pressure film shaping processability, can effectively improve flexibility, roughness and the ageing resistance of low pressure film.
Preferably, the tackifier is cyclopentadiene and/or hydrogenated rosin glyceride.
By adopting the technical scheme, cyclopentadiene and hydrogenated rosin glyceride are both adhesion promoters with excellent performance, so that the adhesion among the components can be improved, and the mechanical properties of the low-pressure film are further improved.
Preferably, the high-flatness ultrathin low-pressure film is prepared by the following method:
s1, mixing raw materials according to a formula, stirring for 40-60min at a rotating speed of 2000-5000r/min, heating to 210-240 ℃ for extrusion, then performing inflation with an inflation ratio of 2-6, and cooling and shaping to obtain a base film;
s2, transversely stretching the base film obtained in the step S1, wherein the stretching multiplying power is 4-6 times, the stretching temperature is 95-115 ℃, then longitudinally stretching, the stretching multiplying power is 6-8 times, the stretching temperature is 110-125 ℃, cooling and rolling to obtain the high-flatness ultrathin low-pressure film.
By adopting the technical scheme, in the preparation process of the high-flatness ultrathin low-pressure film, the high flatness and the ultrathin performance of the obtained low-pressure film are realized by controlling various process parameters, the steps are simple, the cost is low, and the comprehensive performance of the high-flatness ultrathin low-pressure film is optimized.
In summary, the present application has the following beneficial effects:
1. the low-pressure film adopts high-density polyethylene, linear low-density polyethylene, inorganic salt, modified montmorillonite, plasticizer and tackifier as raw materials, and the obtained low-pressure film has high flatness, ultra-thin performance and excellent mechanical property.
2. The modified montmorillonite is prepared from montmorillonite, cinnamic acid, succinic acid, a modifier, pentaerythritol ester and other raw materials, wherein the montmorillonite is firstly ground and calcined, and then the montmorillonite is acidified by adopting the combined action of the cinnamic acid and the succinic acid to obtain acidified montmorillonite; modifying the acidified montmorillonite by a modifier to obtain modified montmorillonite; the modified montmorillonite has good compatibility and dispersibility, so that the surface of the low-pressure membrane is uniform and smooth.
3. The production process of the high-flatness ultrathin low-pressure film has the advantages of simple steps, low cost, environment friendliness, suitability for industrial production, more excellent comprehensive performance of the obtained low-pressure film and wide application prospect.
Detailed Description
The present application is described in further detail below with reference to examples.
Preparation examples 1-5, comparative preparation examples 1, 2 provide modifiers and methods of preparing the same.
Preparation example 1
The modifier comprises the following raw materials: 80g of nano titanium dioxide, 20g of lignin, 10g of polyvinylpyrrolidone, 60g of silane coupling agent, 5g of sophorolipid, 110g of ethanol and 200g of water;
wherein the silane coupling agent is prepared by mixing vinyl triethoxysilane and vinyl tri (beta-methoxyethoxy) silane in a mass ratio of 4:5;
a modifier prepared by the method comprising:
adding nano titanium dioxide, lignin and sophorolipid into water, stirring at 600r/min for 60min, and uniformly mixing to obtain a mixture A;
adding a silane coupling agent and polyvinylpyrrolidone into ethanol, stirring at 40 ℃ and a rotation speed of 400r/min for 40min, and uniformly mixing to obtain a mixture B;
and carrying out ultrasonic mixing on the mixture A and the mixture B for 1h to obtain the modifier.
Preparation example 2
The modifier comprises the following raw materials: 90g of nano titanium dioxide, 25g of lignin, 12g of polyvinylpyrrolidone, 65g of silane coupling agent, 6g of sophorolipid, 120g of ethanol and 220g of water;
wherein the silane coupling agent is prepared by mixing vinyl triethoxysilane and vinyl tri (beta-methoxyethoxy) silane in a mass ratio of 1:1;
a modifier prepared by the method comprising:
adding nano titanium dioxide, lignin and sophorolipid into water, stirring for 50min at a rotating speed of 650r/min, and uniformly mixing to obtain a mixture A;
adding a silane coupling agent and polyvinylpyrrolidone into ethanol, stirring at 45 ℃ for 35min at a rotating speed of 600r/min, and uniformly mixing to obtain a mixture B;
and carrying out ultrasonic mixing on the mixture A and the mixture B for 1.2h to obtain the modifier.
Preparation example 3
The modifier comprises the following raw materials: 100g of nano titanium dioxide, 30g of lignin, 15g of polyvinylpyrrolidone, 70g of silane coupling agent, 7g of sophorolipid, 130g of ethanol and 250g of water;
wherein the silane coupling agent is prepared by mixing vinyl triethoxysilane and vinyl tri (beta-methoxyethoxy) silane in a mass ratio of 6:5;
a modifier prepared by the method comprising:
adding nano titanium dioxide, lignin and sophorolipid into water, stirring at a rotation speed of 700r/min for 45min, and uniformly mixing to obtain a mixture A;
adding a silane coupling agent and polyvinylpyrrolidone into ethanol, stirring at a rotation speed of 600r/min for 30min at 50 ℃, and uniformly mixing to obtain a mixture B;
and carrying out ultrasonic mixing on the mixture A and the mixture B for 1.5h to obtain the modifier.
Preparation example 4
The modifier comprises the following raw materials: 110g of nano titanium dioxide, 35g of lignin, 18g of polyvinylpyrrolidone, 75g of silane coupling agent, 9g of sophorolipid, 140g of ethanol and 280g of water;
wherein the silane coupling agent is prepared by mixing vinyl triethoxysilane and vinyl tri (beta-methoxyethoxy) silane in a mass ratio of 7:5;
a modifier prepared by the method comprising:
adding nano titanium dioxide, lignin and sophorolipid into water, stirring at 750r/min for 35min, and uniformly mixing to obtain a mixture A;
adding a silane coupling agent and polyvinylpyrrolidone into ethanol, stirring at a rotation speed of 750r/min for 25min at 55 ℃, and uniformly mixing to obtain a mixture B;
and carrying out ultrasonic mixing on the mixture A and the mixture B for 1.8 hours to obtain the modifier.
Preparation example 5
The modifier comprises the following raw materials: 120g of nano titanium dioxide, 40g of lignin, 20g of polyvinylpyrrolidone, 80g of silane coupling agent, 10g of sophorolipid, 150g of ethanol and 300g of water;
wherein the silane coupling agent is prepared by mixing vinyl triethoxysilane and vinyl tri (beta-methoxyethoxy) silane in a mass ratio of 8:5;
a modifier prepared by the method comprising:
adding nano titanium dioxide, lignin and sophorolipid into water, stirring at a rotating speed of 800r/min for 30min, and uniformly mixing to obtain a mixture A;
adding a silane coupling agent and polyvinylpyrrolidone into ethanol, stirring at 60 ℃ at a rotating speed of 800r/min for 20min, and uniformly mixing to obtain a mixture B;
and carrying out ultrasonic mixing on the mixture A and the mixture B for 2 hours to obtain the modifier.
Comparative preparation example 1
Comparative preparation 1, identical to preparation 1, differs in that: the silane coupling agent is only vinyltriethoxysilane.
Comparative preparation example 2
Comparative preparation 2, identical to preparation 1, differs in that: the silane coupling agent is only vinyltris (beta-methoxyethoxy) silane.
Preparation examples 6-10 and comparative preparation examples 3-8 provide modified montmorillonite and preparation methods thereof.
Preparation example 6
Modified montmorillonite comprises the following raw materials: 160g of montmorillonite, 10g of cinnamic acid, 20g of succinic acid, 80g of modifier, 10g of pentaerythritol ester and 200g of water;
wherein, the modifier is prepared by a preparation example 1;
modified montmorillonite is prepared by the following method:
s11, uniformly mixing montmorillonite and pentaerythritol ester, grinding for 2 hours, and calcining for 2 hours at 320 ℃ to obtain calcined montmorillonite;
s12, adding the calcined montmorillonite, cinnamic acid and succinic acid obtained in the step S11 into water, and performing ultrasonic reaction for 1h at 60 ℃ to obtain acidified montmorillonite;
s13, adding a modifier into the acidified montmorillonite obtained in the step S12, regulating the pH value to 4, heating to 60 ℃, preserving heat under the protection of nitrogen, stirring at the rotating speed of 400r/min for reaction for 2 hours, and filtering, washing and drying to obtain the modified montmorillonite.
Preparation example 7
Modified montmorillonite comprises the following raw materials: 170g of montmorillonite, 15g of cinnamic acid, 25g of succinic acid, 90g of modifier, 12g of pentaerythritol ester and 250g of water;
wherein the modifier is prepared in preparation example 2;
modified montmorillonite is prepared by the following method:
s11, uniformly mixing montmorillonite and pentaerythritol ester, grinding for 2.3 hours, and calcining for 1.8 hours at 340 ℃ to obtain calcined montmorillonite;
s12, adding the calcined montmorillonite, cinnamic acid and succinic acid obtained in the step S11 into water, and carrying out ultrasonic reaction for 0.9h at 70 ℃ to obtain acidified montmorillonite;
s13, adding a modifier into the acidified montmorillonite obtained in the step S12, regulating the pH value to 4.2, heating to 62 ℃, preserving heat under the protection of nitrogen, stirring at the rotating speed of 450r/min for reaction for 1.8h, and filtering, washing and drying to obtain the modified montmorillonite.
Preparation example 8
Modified montmorillonite comprises the following raw materials: 180g of montmorillonite, 20g of cinnamic acid, 30g of succinic acid, 100g of modifier, 15g of pentaerythritol ester and 300g of water;
wherein the modifier is prepared in preparation example 3;
modified montmorillonite is prepared by the following method:
s11, uniformly mixing montmorillonite and pentaerythritol ester, grinding for 2.5 hours, and calcining for 1.5 hours at 350 ℃ to obtain calcined montmorillonite;
s12, adding the calcined montmorillonite, cinnamic acid and succinic acid obtained in the step S11 into water, and carrying out ultrasonic reaction for 0.8h at 70 ℃ to obtain acidified montmorillonite;
s13, adding a modifier into the acidified montmorillonite obtained in the step S12, regulating the pH value to 4.5, heating to 65 ℃, preserving heat under the protection of nitrogen, stirring at the rotating speed of 500r/min for reaction for 1.5h, and filtering, washing and drying to obtain the modified montmorillonite.
Preparation example 9
Modified montmorillonite comprises the following raw materials: 190g of montmorillonite, 25g of cinnamic acid, 35g of succinic acid, 110g of modifier, 18g of pentaerythritol ester and 350g of water;
wherein the modifier is prepared in preparation example 4;
modified montmorillonite is prepared by the following method:
s11, uniformly mixing montmorillonite and pentaerythritol ester, grinding for 2.8 hours, and calcining for 1.2 hours at 370 ℃ to obtain calcined montmorillonite;
s12, adding the calcined montmorillonite, cinnamic acid and succinic acid obtained in the step S11 into water, and performing ultrasonic reaction for 0.6h at 75 ℃ to obtain acidified montmorillonite;
s13, adding a modifier into the acidified montmorillonite obtained in the step S12, regulating the pH value to 4.8, heating to 68 ℃, preserving heat under the protection of nitrogen, stirring at the rotating speed of 550r/min for reaction for 1.2h, and filtering, washing and drying to obtain the modified montmorillonite.
Preparation example 10
Modified montmorillonite comprises the following raw materials: 200g of montmorillonite, 30g of cinnamic acid, 40g of succinic acid, 120g of modifier, 20g of pentaerythritol ester and 400g of water;
wherein the modifier is prepared in preparation example 5;
modified montmorillonite is prepared by the following method:
s11, uniformly mixing montmorillonite and pentaerythritol ester, grinding for 3 hours, and calcining for 1 hour at 380 ℃ to obtain calcined montmorillonite; s12, adding the calcined montmorillonite, cinnamic acid and succinic acid obtained in the step S11 into water, and performing ultrasonic reaction for 0.5h at 80 ℃ to obtain acidified montmorillonite;
s13, adding a modifier into the acidified montmorillonite obtained in the step S12, regulating the pH value to 5, heating to 70 ℃, preserving heat under the protection of nitrogen, stirring at the rotating speed of 600r/min for reaction for 1h, and filtering, washing and drying to obtain the modified montmorillonite.
Comparative preparation example 3
Comparative preparation 3 the same as preparation 6, except that the modifier was prepared from comparative preparation 1.
Comparative preparation example 4
Comparative preparation 4 the same as preparation 6, except that the modifier was prepared from comparative preparation 2.
Comparative preparation example 5
Comparative preparation 5, same as preparation 6, except that the modifier was mixture a of preparation 1.
Comparative preparation example 6
Comparative preparation 6 the same as in preparation 6, except that the modifier was mixture B of preparation 1.
Comparative preparation example 7
Comparative preparation 7 the same as preparation 6, except that succinic acid of equal mass was used instead of cinnamic acid.
Comparative preparation example 8
Comparative preparation 8 the same as preparation 6, except that succinic acid was replaced with cinnamic acid of equal mass.
Examples 1-7 provide a high flatness ultra thin low pressure film.
Example 1
The high-flatness ultra-thin low-pressure film comprises the following raw materials: 600g of high-density polyethylene, 80g of linear low-density polyethylene, 50g of inorganic salt, 70g of modified montmorillonite, 10g of plasticizer and 1g of tackifier;
wherein the density of the high-density polyethylene is 0.950g/cm 3 The melt index is 3g/10min; the linear low density polyethylene had a density of 0.920g/cm 3 The melt index is 1.5g/10min; the inorganic salt is prepared by mixing nano calcium carbonate and nano barium sulfate in a mass ratio of 2:5; modified montmorillonite was prepared from preparation example 6; the plasticizer is prepared by mixing epoxy decyl oleate and white oil in a mass ratio of 3:4; the tackifier is cyclopentadiene;
the high-flatness ultrathin low-pressure film is prepared by the following method:
s1, mixing raw materials according to a formula, stirring for 40min at a rotating speed of 2000r/min, heating to 210 ℃ and extruding, then blowing with a blowing ratio of 2, and cooling and shaping to obtain a base film;
s2, transversely stretching the base film obtained in the step S1, wherein the stretching multiplying power is 4 times, the stretching temperature is 95 ℃, then longitudinally stretching, the stretching multiplying power is 6 times, the stretching temperature is 110 ℃, cooling and rolling to obtain the high-flatness ultrathin low-pressure film.
Example 2
The high-flatness ultra-thin low-pressure film comprises the following raw materials: 700g of high-density polyethylene, 90g of linear low-density polyethylene, 60g of inorganic salt, 75g of modified montmorillonite, 12g of plasticizer and 2g of tackifier;
wherein the density of the high-density polyethylene is 0.954g/cm 3 The melt index is 4g/10min; the density of the linear low density polyethylene is 0.922g/cm 3 Melt index of 2 g-For 10min; the inorganic salt is prepared by mixing nano calcium carbonate and nano barium sulfate in a mass ratio of 3:5; modified montmorillonite was prepared from preparation example 6; the plasticizer is obtained by mixing epoxy decyl oleate and white oil in a mass ratio of 1:1; the tackifier is hydrogenated rosin glyceride;
the high-flatness ultrathin low-pressure film is prepared by the following method:
s1, mixing raw materials according to a formula, stirring for 45min at a rotating speed of 3000r/min, heating to 220 ℃ and extruding, then blowing with a blowing ratio of 3, and cooling and shaping to obtain a base film;
s2, transversely stretching the base film obtained in the step S1, wherein the stretching multiplying power is 4.5 times, the stretching temperature is 100 ℃, then longitudinally stretching, the stretching multiplying power is 6.5 times, the stretching temperature is 115 ℃, cooling and rolling to obtain the high-flatness ultrathin low-pressure film.
Example 3
The high-flatness ultra-thin low-pressure film comprises the following raw materials: 800g of high-density polyethylene, 100g of linear low-density polyethylene, 80g of inorganic salt, 80g of modified montmorillonite, 15g of plasticizer and 3g of tackifier;
wherein the density of the high-density polyethylene is 0.958g/cm 3 The melt index is 6g/10min; the linear low density polyethylene has a density of 0.925g/cm 3 Melt index of 2.5g/10min; the inorganic salt is prepared by mixing nano calcium carbonate and nano barium sulfate in a mass ratio of 4:5; modified montmorillonite was prepared from preparation 8; the plasticizer is obtained by mixing epoxy decyl oleate and white oil in a mass ratio of 5:4; the tackifier is prepared by mixing cyclopentadiene and hydrogenated rosin glyceride in a mass ratio of 1:1;
the high-flatness ultrathin low-pressure film is prepared by the following method:
s1, mixing raw materials according to a formula, stirring for 50min at a rotating speed of 3500r/min, heating to 230 ℃ for extrusion, then performing inflation with an inflation ratio of 4, and cooling and shaping to obtain a base film;
s2, transversely stretching the base film obtained in the step S1, wherein the stretching multiplying power is 5 times, the stretching temperature is 105 ℃, then longitudinally stretching, the stretching multiplying power is 7 times, the stretching temperature is 120 ℃, cooling and rolling to obtain the high-flatness ultrathin low-pressure film.
Example 4
The high-flatness ultra-thin low-pressure film comprises the following raw materials: 900g of high-density polyethylene, 110g of linear low-density polyethylene, 100g of inorganic salt, 85g of modified montmorillonite, 18g of plasticizer and 4g of tackifier;
wherein the density of the high-density polyethylene is 0.960g/cm 3 The melt index is 7g/10min; the linear low density polyethylene had a density of 0.928g/cm 3 The melt index is 3.5g/10min; the inorganic salt is prepared by mixing nano calcium carbonate and nano barium sulfate in a mass ratio of 1:1; modified montmorillonite was prepared from preparation example 9; the plasticizer is obtained by mixing epoxy decyl oleate and white oil in a mass ratio of 5.5:4; the tackifier is prepared by mixing cyclopentadiene and hydrogenated rosin glyceride in a mass ratio of 1:2;
the high-flatness ultrathin low-pressure film is prepared by the following method:
s1, mixing the raw materials according to a formula, stirring for 55min at the rotating speed of 4000r/min, heating to 230 ℃ for extrusion, then performing inflation with the inflation ratio of 5.5, and cooling and shaping to obtain a base film;
s2, transversely stretching the base film obtained in the step S1, wherein the stretching multiplying power is 5.5 times, the stretching temperature is 110 ℃, then longitudinally stretching, the stretching multiplying power is 7.5 times, the stretching temperature is 123 ℃, cooling and rolling to obtain the high-flatness ultrathin low-pressure film.
Example 5
The high-flatness ultra-thin low-pressure film comprises the following raw materials: 1000g of high-density polyethylene, 120g of linear low-density polyethylene, 150g of inorganic salt, 90g of modified montmorillonite, 20g of plasticizer and 5g of tackifier;
wherein the density of the high-density polyethylene is 0.962g/cm 3 The melt index is 8g/10min; the linear low density polyethylene had a density of 0.930g/cm 3 The melt index is 4g/10min; the inorganic salt is prepared by mixing nano calcium carbonate and nano barium sulfate in a mass ratio of 6:5; modified montmorillonite was prepared from preparation 10; the plasticizer is prepared by mixing epoxy decyl oleate and white oil in a mass ratio of 3:2; the tackifier is prepared by mixing cyclopentadiene and hydrogenated rosin glyceride in a mass ratio of 2:1;
the high-flatness ultrathin low-pressure film is prepared by the following method:
s1, mixing raw materials according to a formula, stirring for 60min at a rotation speed of 5000r/min, heating to 240 ℃ for extrusion, then performing inflation with an inflation ratio of 6, and cooling and shaping to obtain a base film;
s2, transversely stretching the base film obtained in the step S1, wherein the stretching multiplying power is 6 times, the stretching temperature is 115 ℃, then longitudinally stretching, the stretching multiplying power is 8 times, the stretching temperature is 125 ℃, cooling and rolling to obtain the high-flatness ultrathin low-pressure film.
Example 6
Example 6, which differs from example 1 only in that: the tackifier is hydrogenated rosin glyceride.
Example 7
Example 7, which differs from example 1 only in that: the tackifier is obtained by mixing cyclopentadiene and hydrogenated rosin glyceride in a mass ratio of 1:1.
To verify the performance of the low pressure films provided herein, applicants set comparative examples 1-19, wherein:
comparative example 1
Comparative example 1, which differs from example 1 only in that: the linear low density polyethylene is replaced by high density polyethylene of equal quality.
Comparative example 2
Comparative example 2, which differs from example 1 only in that: the high density polyethylene is replaced with an equal mass of linear low density polyethylene.
Comparative example 3
Comparative example 3, which differs from example 1 only in that: the inorganic salt is only nano calcium carbonate.
Comparative example 4
Comparative example 4, which differs from example 1 only in that: the inorganic salt is only nano barium sulfate.
Comparative example 5
Comparative example 5, which differs from example 1 only in that: the inorganic salt is prepared by mixing nano calcium carbonate and nano barium sulfate in a mass ratio of 1:10.
Comparative example 6
Comparative example 6, which differs from example 1 only in that: the inorganic salt is prepared by mixing nano calcium carbonate and nano barium sulfate in a mass ratio of 2:1.
Comparative example 7
Comparative example 7, which differs from example 1 only in that: modified montmorillonite was prepared from comparative preparation 3.
Comparative example 8
Comparative example 8, which differs from example 1 only in that: modified montmorillonite was prepared from comparative preparation 4.
Comparative example 9
Comparative example 9, which differs from example 1 only in that: modified montmorillonite was prepared from comparative preparation 5.
Comparative example 10
Comparative example 10, which differs from example 1 only in that: modified montmorillonite was prepared from comparative preparation 6.
Comparative example 11
Comparative example 11, which differs from example 1 only in that: modified montmorillonite was prepared from comparative preparation 7.
Comparative example 12
Comparative example 12, which differs from example 1 only in that: modified montmorillonite was prepared from comparative preparation 8.
Comparative example 13
Comparative example 13, which is identical to example 1, differs in that: the modified montmorillonite is replaced by montmorillonite with equal quality.
Comparative example 14
Comparative example 14, which is identical to example 1, differs in that: the plasticizer is only decyl epoxy oleate.
Comparative example 15
Comparative example 15, which is identical to example 1, differs in that: the plasticizer is only white oil.
Comparative example 16
Comparative example 16, which is identical to example 1, differs in that: the plasticizer is obtained by mixing epoxy decyl oleate and white oil in a mass ratio of 1:4.
Comparative example 17
Comparative example 17, which is identical to example 1, differs in that: the plasticizer is obtained by mixing epoxy decyl oleate and white oil in a mass ratio of 2:1.
Comparative example 18
Comparative example 18, which is identical to example 1, differs in that: the tackifier is rosin.
Comparative example 19
Comparative example 19, which is identical to example 1, differs in that: the tackifier is hydroxypropyl cellulose.
The main properties of the low pressure films obtained in examples 1 to 7 and comparative examples 1 to 19 were examined, respectively, to give the following result parameters, see in particular table 1:
tensile breaking properties: the detection is carried out by referring to GB/T130221991 tensile property test method of plastic film;
flatness: the low pressure film was cut into 270 x 210mm gauge coupons and four sides were observed on a glass plate for lift height, providing: (1) no warpage is A, and the optimal; (2) the tilting height is 0-1mm as B, good; (3) the tilting height is C which is more than 1mm, and the worst is the worst;
thickness: and measuring the thickness of the low-pressure film by adopting a step instrument.
Table 1:
as can be seen from the data shown in table 1: the low-pressure films obtained in examples 1-7 of the application have better comprehensive properties than the low-pressure films obtained in comparative examples 1-19, have excellent tensile properties and high flatness, and the thickness of the films is 11-15 mu m, so that the low-pressure films have wide market prospects.
From example 1 and comparative examples 1 and 2, it is understood that: the low pressure film of example 1 was obtained from materials including high density polyethylene and linear low density polyethylene, and was more excellent in combination properties than those of comparative examples 1 and 2.
From example 1 and comparative examples 3 to 6, it is understood that: the raw materials of the low-pressure film in the embodiment 1 comprise inorganic salts, wherein the inorganic salts are prepared by mixing nano calcium carbonate and nano barium sulfate according to a certain mass ratio, the mass ratio range is 2-6:5, compared with the low-pressure film in the comparative example 3-6, the flatness and tensile fracture performance of the low-pressure film obtained in the embodiment 1 are better, the nano calcium carbonate and the nano barium sulfate are fully described, and the nano calcium carbonate and the nano barium sulfate are synergistic, so that the flatness of the low-pressure film can be improved; and the mass ratio of the two is controlled within a certain range, which is more beneficial to improving the performance of the low-pressure film.
As can be seen from example 1 and comparative examples 7 and 8: the low pressure film of example 1 was prepared from modified montmorillonite prepared in preparation example 6, and the modifier used in preparation example 6 was prepared in preparation example 1, wherein the silane coupling agent was prepared by mixing vinyltriethoxysilane with vinyltris (β -methoxyethoxy) silane, and the tensile break strength and breaking elongation of the low pressure film obtained in example 1 were significantly increased, and the thickness of the low pressure film was also made thinner, as compared with comparative examples 7 and 8.
As can be seen from example 1 and comparative examples 9 and 10: the raw materials of the low pressure film of example 1 include modified montmorillonite, the modified montmorillonite is prepared in preparation example 6, the modifier used in preparation example 6 is prepared in preparation example 1, the mixture A and the mixture B are mixed to obtain the modifier, and compared with comparative examples 9 and 10, the flatness of the low pressure film obtained in example 1 is significantly improved, which means that the modifier prepared in preparation example 1 is more beneficial to improving the compatibility and the dispersibility of the modified montmorillonite, and further improving the flatness of the low pressure film.
As can be seen from example 1 and comparative examples 11 and 12: the raw materials of the low-pressure membrane of example 1 comprise modified montmorillonite, the modified montmorillonite is prepared in preparation example 6, succinic acid and cinnamic acid are adopted to jointly acidify the montmorillonite in preparation example 6, and the low-pressure membrane obtained in example 1 has more excellent comprehensive performance than that of comparative examples 11 and 12.
As can be seen from example 1 and comparative example 13: the montmorillonite used as the raw material of the low-pressure film of example 1 was modified in preparation example 6, and the low-pressure film obtained in example 1 not only has excellent mechanical properties, but also has higher flatness as compared with comparative example 13.
From example 1 and comparative examples 14 to 17, it is understood that: the low-pressure film of example 1 comprises a plasticizer, wherein the plasticizer is obtained by mixing epoxy decyl oleate and white oil according to a certain mass ratio, the mass ratio is 3-6:4, and compared with comparative examples 14-17, the low-pressure film obtained in example 1 is ultrathin, and has good mechanical properties and high flatness.
From examples 1, 6, 7 and comparative examples 18, 19, it can be seen that: the low pressure films of examples 1, 6 and 7 were obtained from a plasticizer comprising cyclopentadiene and/or hydrogenated rosin glyceride, and were further excellent in flatness and stretching properties.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (10)
1. The high-flatness ultra-thin low-pressure film is characterized by comprising the following raw materials in parts by weight: 60-100 parts of high-density polyethylene, 8-12 parts of linear low-density polyethylene, 5-15 parts of inorganic salt, 7-9 parts of modified montmorillonite, 1-2 parts of plasticizer and 0.1-0.5 part of tackifier;
the modified montmorillonite is prepared from the following raw materials in parts by weight: 16-20 parts of montmorillonite, 1-3 parts of cinnamic acid, 2-4 parts of succinic acid, 8-12 parts of modifier, 1-2 parts of pentaerythritol ester and 20-40 parts of water.
2. The high-flatness ultra-thin low pressure film of claim 1, wherein the high density polyethylene has a density of 0.950-0.962g/cm 3 The melt index is 3-8g/10min; the linear low density polyethylene has a density of 0.920 to 0.930g/cm 3 The melt index is 1.5-4g/10min.
3. The high-flatness ultrathin low-pressure film according to claim 2, wherein the inorganic salt is obtained by mixing nano calcium carbonate and nano barium sulfate in a mass ratio of 2-6:5.
4. The high-flatness ultra-thin low pressure film according to claim 1, wherein the modified montmorillonite is prepared by the following method:
s11, uniformly mixing montmorillonite and pentaerythritol ester, grinding for 2-3 hours, and calcining for 1-2 hours at 320-380 ℃ to obtain calcined montmorillonite;
s12, adding the calcined montmorillonite, cinnamic acid and succinic acid obtained in the step S11 into water, and performing ultrasonic reaction for 0.5-1h at 60-80 ℃ to obtain acidified montmorillonite;
s13, adding a modifier into the acidified montmorillonite obtained in the step S12, regulating the pH value to 4-5, heating to 60-70 ℃, reacting for 1-2h under the protection of nitrogen under the condition of heat preservation and stirring, filtering, washing and drying to obtain the modified montmorillonite.
5. The high-flatness ultra-thin low pressure film of claim 4, wherein the modifier comprises the following raw materials in parts by weight: 8-12 parts of nano titanium dioxide, 2-4 parts of lignin, 1-2 parts of polyvinylpyrrolidone, 6-8 parts of a silane coupling agent, 0.5-1 part of sophorolipid, 11-15 parts of ethanol and 20-30 parts of water.
6. The high-flatness ultra-thin low pressure film of claim 5, wherein the modifier is made by the following method:
adding nano titanium dioxide, lignin and sophorolipid into water, and uniformly stirring to obtain a mixture A;
adding a silane coupling agent and polyvinylpyrrolidone into ethanol, and uniformly stirring to obtain a mixture B;
and (3) carrying out ultrasonic mixing on the mixture A and the mixture B to obtain the modifier.
7. The high-flatness ultra-thin low pressure film of claim 5, wherein the silane coupling agent is obtained by mixing vinyl triethoxysilane and vinyl tri (beta-methoxyethoxy) silane in a mass ratio of 4-8:5.
8. The high-flatness ultra-thin low pressure film according to claim 1, wherein the plasticizer is obtained by mixing epoxy decyl oleate and white oil in a mass ratio of 3-6:4.
9. The high flatness ultra thin low pressure film of claim 1, wherein the tackifier is cyclopentadiene and/or hydrogenated rosin glycerol ester.
10. The high-flatness ultra-thin low pressure film of claim 1, wherein the high-flatness ultra-thin low pressure film is made by the following method:
s1, mixing raw materials according to a formula, stirring for 40-60min at a rotating speed of 2000-5000r/min, heating to 210-240 ℃ for extrusion, then performing inflation with an inflation ratio of 2-6, and cooling and shaping to obtain a base film;
s2, transversely stretching the base film obtained in the step S1, wherein the stretching multiplying power is 4-6 times, the stretching temperature is 95-115 ℃, then longitudinally stretching, the stretching multiplying power is 6-8 times, the stretching temperature is 110-125 ℃, cooling and rolling to obtain the high-flatness ultrathin low-pressure film.
Priority Applications (1)
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