CN117659555A - Opening extrusion-assisting master batch for heavy packaging film and preparation method thereof - Google Patents
Opening extrusion-assisting master batch for heavy packaging film and preparation method thereof Download PDFInfo
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- 239000004594 Masterbatch (MB) Substances 0.000 title claims abstract description 78
- 239000012785 packaging film Substances 0.000 title claims abstract description 61
- 229920006280 packaging film Polymers 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 51
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 24
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 24
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 20
- 239000007822 coupling agent Substances 0.000 claims abstract description 17
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 16
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 16
- 239000011737 fluorine Substances 0.000 claims abstract description 16
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 14
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 13
- 239000000314 lubricant Substances 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 17
- -1 polyethylene Polymers 0.000 claims description 14
- 239000004698 Polyethylene Substances 0.000 claims description 13
- 229920000573 polyethylene Polymers 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000004964 aerogel Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 4
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 4
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 4
- 239000012748 slip agent Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 4
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 3
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 150000004645 aluminates Chemical class 0.000 claims description 3
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 3
- 235000013539 calcium stearate Nutrition 0.000 claims description 3
- 239000008116 calcium stearate Substances 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 3
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000001993 wax Substances 0.000 claims description 3
- 239000005662 Paraffin oil Substances 0.000 claims description 2
- AGXUVMPSUKZYDT-UHFFFAOYSA-L barium(2+);octadecanoate Chemical compound [Ba+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O AGXUVMPSUKZYDT-UHFFFAOYSA-L 0.000 claims description 2
- 239000002530 phenolic antioxidant Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 10
- 239000002994 raw material Substances 0.000 description 8
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000012752 auxiliary agent Substances 0.000 description 5
- 238000010096 film blowing Methods 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 235000010215 titanium dioxide Nutrition 0.000 description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004705 High-molecular-weight polyethylene Substances 0.000 description 1
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- 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
- C08J2323/08—Copolymers of ethene
-
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2427/20—Homopolymers or copolymers of hexafluoropropene
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- Chemical & Material Sciences (AREA)
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- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of high molecular compounds, and particularly discloses an opening extrusion-assisting master batch for a heavy packaging film and a preparation method thereof. The extrusion-assisting master batch for the opening of the heavy packaging film comprises the following components in parts by mass: 90-100 parts of linear low density polyethylene LLDPE, 20-50 parts of an opening agent, 4.5-9.5 parts of a fluorine-containing processing aid PPA, 2-12 parts of a dispersing agent, 0.5-2 parts of a coupling agent, 0.2-1 part of a lubricant, 0.05-0.2 part of a slipping agent and 0.5-1.2 parts of an antioxidant. The extrusion-assisted master batch for the packaging film has good application effect, wherein the silicon dioxide opening agent component can form microscopic protrusions on the surface of the film, reduce the contact area between the films, prevent the formation of vacuum closure, and can greatly reduce the adhesion force between the films by matching with smooth dispersing components so as to promote the films to be easy to open; the fluorine-containing processing aid PPA has the advantages of reducing apparent viscosity of melt, eliminating or reducing die accumulation, preventing melt fracture, improving film surface quality, improving production efficiency and reducing processing energy consumption.
Description
Technical Field
The invention relates to the technical field of high molecular compounds, and particularly discloses an opening extrusion-assisting master batch for a heavy packaging film and a preparation method thereof.
Background
The heavy packaging film is a packaging film bag capable of bearing 10-50 kg of solid particles or powdery materials, and generally adopts a packaging film bag filled with 25kg, so the heavy packaging film is also called as a 25kg bag. The heavy packaging film is a film packaging bag which is produced by taking polyethylene as a main raw material and adopting the procedures of multilayer coextrusion, film blowing, printing and the like, is mainly used for automatic packaging of solid petrochemical products such as polyethylene, polypropylene, ABS, fertilizers and the like, is a packaging film bag capable of realizing continuous automatic forming, opening filling, heating sealing and the like in multiple procedures and operation processes, has the advantages of high packaging efficiency, no pollution, low cost of raw materials and labor, good sealing effect, easy recycling and the like, and is gradually replacing the traditional packaging articles such as plastic woven bags, paper-plastic composite bags, paper bags and the like.
The heavy packaging film is generally formed by taking metallocene linear low density polyethylene (mldpe), linear low density polyethylene (lldpe), low density polyethylene (ldpe), high density polyethylene (hde) and other plastic products as main raw materials, assisting with antistatic master batch, titanium white master batch, extrusion-assisting master batch, opening master batch and other functional master batch products, forming a film by using a multilayer coextrusion film blowing technology, and then forming a roll film packaging bag through production processes such as printing, flanging and embossing. The polyethylene base material mainly provides mechanical properties such as toughness, stretching, stiffness and the like required by the heavy packaging film bag, and the functional masterbatches such as antistatic masterbatches, titanium white masterbatches, extrusion-assisting masterbatches, opening masterbatches and the like provide antistatic properties, chromaticity, opening properties and convenient extrusion and film forming properties required by the heavy packaging film bag, so that the polyethylene base material has a vital effect. The polyethylene base material and functional master batch product form an inner layer, an intermediate layer and an outer layer which are finally converged and bonded at a die opening to form film bubbles in the multilayer coextrusion film forming process, and then the film bubbles are cooled, stretched and pressed to form a heavy packaging film product, wherein the opening master batch and the extrusion-assisting master batch are applied to an inner layer film, the titanium white master batch is applied to a middle layer film, and the antistatic master batch and the extrusion-assisting master batch are applied to an outer layer film.
The master batch for the heavy packaging film is usually synthesized by taking polyethylene resin and an opening agent as main raw materials and assisting in dispersing other functional auxiliary agents such as lubricants, antioxidants and the like through a melt blending extrusion process, and can effectively reduce the adhesion effect between film products and improve the opening performance of the film. Gao Lingyan et al in patent CN106317582a disclose a polyethylene masterbatch with pumice powder as a tapping agent and a process for preparing the same; zhao Ligong et al in patent CN109233080a disclose a calcium sulfate opening masterbatch and a method of making the same; yumingdong et al in patent CN106832547a disclose an open smooth masterbatch and a method of preparing the same; the extrusion-assisting master batch for the heavy packaging film is generally synthesized by taking polyethylene resin and a fluoropolymer processing-assisting aid PPA (hexafluoropropylene-vinylidene fluoride-tetrafluoroethylene copolymer) as main raw materials and assisting in dispersing lubricant, antioxidant and other functional aids through a melt blending extrusion process. Huang Baoquan et al in patent CN109135013a disclose a method of preparing a fluorine-containing processing masterbatch for high molecular weight polyethylene film; zhao Jinxia et al in patent CN112812408a disclose a polyolefin rheology masterbatch-PPA and a process for its preparation; wang Hua et al in patent CN116410536a disclose a masterbatch for producing an inner layer of a multilayer co-extruded heavy packaging film and a process for its preparation, an inner layer raw material and a packaging film.
The masterbatch that is used for the heavy packaging film inlayer at the present stage is two kinds of masterbatch products of opening masterbatch and helping extrusion masterbatch, be used for improving the anti-blocking nature and the processing mobility of heavy packaging film product respectively, two kinds of masterbatch products of prior art are prepared respectively, in the multilayer coextrusion blown film of heavy packaging film in-process, the inlayer needs to add two kinds of masterbatch products of opening masterbatch and helping extrusion masterbatch, the manufacturing cost of heavy packaging film product has been increased, secondly opening masterbatch and help extrusion masterbatch use matrix resin, processing auxiliary agent etc. all have the difference, its flow dispersibility of itself is different, can lead to its flow dispersion in heavy packaging film product to be hindered, and then influence the mobility and the surperficial smoothness roughness of heavy packaging film product.
Therefore, it is necessary to develop a master batch product with two functions of anti-adhesion and extrusion assistance, and solve the problems of low fluidity and surface smoothness of the heavy packaging film product caused by poor flow dispersibility of the two master batch products in the heavy packaging film product due to different base materials and auxiliary agents in the existing heavy packaging film multilayer co-extrusion film blowing technology.
Disclosure of Invention
The technical scheme adopted by the invention is as follows:
in a first aspect, the invention provides an opening extrusion assisting master batch for a heavy packaging film, which comprises the following components in parts by mass:
linear low density polyethylene LLDPE:90-100 parts
And (3) an opening agent: 20-50 parts
Fluorine-containing co-processing aid PPA:4.5-9.5 parts
Dispersing agent: 2-12 parts
Coupling agent: 0.5-2 parts
And (3) a lubricant: 0.2-1 part
Slip agent: 0.05-0.2 part
An antioxidant: 0.5-1.2 parts
The linear low-density polyethylene LLDPE has a melt index of 2-10 g/10min under the conditions of the test condition of 190 ℃ and 2.16 kg;
the opening agent is aerogel silicon dioxide opening agent; silica SiO in the aerogel silica opening agent 2 The content is more than or equal to 99 percent, the average grain diameter is 2.5-10 mu m, the water content is less than or equal to 1 percent, the oil absorption value is 115-200mL/100g, the whiteness is more than or equal to 95, and the ferric oxide Fe is 2 O 3 The content is less than or equal to 0.01 percent;
the fluorine-containing processing aid PPA is hexafluoropropylene-vinylidene fluoride-tetrafluoroethylene copolymer;
preferably, the dispersing agent is any one of ethylene bis-stearamide EBS, paraffin oil and polyethylene wax.
Preferably, the coupling agent is one or a mixture of more than two of silane coupling agent, titanate coupling agent or aluminate coupling agent.
Preferably, the lubricant is one or a mixture of more than two of zinc stearate, calcium stearate and barium stearate.
Preferably, the slipping agent is one or a mixture of two of oleamide and erucamide.
Preferably, the antioxidant is a mixture of hindered phenol antioxidants and phosphite antioxidants.
Further, the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant is 1:1-1:3.
in a second aspect, the invention provides a method for preparing the extrusion-assisted masterbatch for the opening of the repackaging film, which specifically comprises the following steps: weighing linear low-density polyethylene, a silicon dioxide opening agent, a fluorine-containing processing aid PPA, a dispersing agent, a coupling agent, a lubricant, a slipping agent and an antioxidant according to the mass ratio of the first aspect, premixing the materials to be uniform by using a high-speed mixer, and then placing the premixed materials into a double-screw extruder for melt blending extrusion, cooling and granulating to obtain an opening extrusion-assisting master batch for the heavy packaging film; wherein the temperature of the twin-screw extruder is set to be 150-180 ℃ in the first area, 200-220 ℃ in the second area, 210-230 ℃ in the third area, 205-225 ℃ in the fourth area, 200-220 ℃ in the fifth area and 185-210 ℃ in the six-area die head, and the extrusion residence time is 3-10 minutes.
In a third aspect, the invention provides a method for using the extrusion-assisted master batch for opening of the repackaging film, which is prepared by the method in the second aspect, and the extrusion-assisted master batch for opening of the repackaging film is applied to the inner layer of the repackaging film product.
Preferably, the additive amount of the opening extrusion assisting master batch for the heavy packaging film is 0.3-0.8% of the total mass of the matrix resin prepared by the heavy packaging film.
The invention has the beneficial effects that:
the extrusion-assisted master batch for the packaging film has good application effect, wherein the silicon dioxide opening agent component can form microscopic protrusions on the surface of the film, reduce the contact area between the films, prevent the formation of vacuum closure, and can greatly reduce the adhesion force between the films by matching with smooth dispersing components so as to promote the films to be easy to open; the fluorine-containing processing aid PPA has the effects of reducing apparent viscosity of melt, eliminating or reducing die accumulation, preventing melt fracture, improving film surface quality, improving production efficiency, reducing processing energy consumption and the like.
Detailed Description
The present invention will be further described in detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be noted that the present invention is not limited to the following examples.
Example 1
The opening extrusion-assisting master batch product for the repackaging film in the embodiment comprises the following raw materials in parts by weight:
linear low density polyethylene LLDPE (melt index: 2g/10min,190 ℃,2.16 kg): 90 parts;
the pore-forming agent (silica pore-forming agent, content is more than or equal to 99%, average grain diameter is 2.5 μm, water content is less than or equal to 1%, oil absorption value is 115ml/100g, whiteness is more than or equal to 95, and ferric oxide content is less than or equal to 0.01%): 20 parts;
fluorine-containing processing aid PPA (FX-5920A, U.S. 3M): 4.5 parts;
dispersant (ethylene bis stearamide EBS): 2 parts;
coupling agent: (silane coupling agent KH-550): 0.5 parts;
and (3) a lubricant: (zinc stearate): 0.2 parts;
slip agent: (oleamide): 0.05 parts;
an antioxidant: (hindered phenol antioxidant 1010: phosphite antioxidant 168=1:1): 0.5 part
The preparation method comprises the steps of weighing the linear low-density polyethylene, the opening agent, the fluorine-containing processing aid PPA, the dispersing agent, the coupling agent, the lubricant, the slipping agent and the antioxidant according to the types and the proportions of the materials, pre-dispersing for 3 minutes by using a high-speed mixer, and then placing the pre-dispersed materials into a double-screw extruder for melt blending extrusion, cooling and granulating to obtain the opening extrusion-assisting master batch for the heavy packaging film, wherein the temperature of the double-screw extruder is set to be 150 ℃ in one area, 200 ℃ in two areas, 210 ℃ in three areas, 205 ℃ in four areas, 200 ℃ in five areas, 185 ℃ in six areas and the extrusion residence time is 3 minutes.
Example 2
The opening extrusion-assisting master batch product for the repackaging film in the embodiment comprises the following raw materials in parts by weight:
linear low density polyethylene LLDPE (melt index: 10g/10min,190 ℃,2.16 kg): 100 parts;
the pore-forming agent (silicon dioxide pore-forming agent, content is more than or equal to 99%, average grain diameter is 10 mu m, water content is less than or equal to 1%, oil absorption value is 200ml/100g, whiteness is more than or equal to 95, and ferric oxide content is less than or equal to 0.01%): 50 parts;
fluorine-containing processing aid PPA (DA-810X, dajin): 9.5 parts;
dispersant (polyethylene wax): 12 parts;
coupling agent: (titanate coupling agent NHK-401 nanjing pavilion: aluminate coupling agent shandong nationalization=1:1): 2 parts;
and (3) a lubricant: (zinc stearate: calcium stearate=1:1): 1 part;
slip agent: (oleamide: erucamide=1:1): 0.2 parts;
an antioxidant: (hindered phenol antioxidant 1010: phosphite antioxidant 168=1:3): 1.2 parts of
The preparation method comprises the steps of weighing the linear low-density polyethylene, the opening agent, the fluorine-containing processing aid PPA, the dispersing agent, the coupling agent, the lubricant, the slipping agent and the antioxidant according to the types and the proportions of the materials, pre-dispersing for 5 minutes by using a high-speed mixer, and then placing the pre-dispersed materials into a double-screw extruder for melt blending extrusion, cooling and granulating to obtain the opening extrusion-assisting master batch for the heavy packaging film, wherein the temperature of the double-screw extruder is set to be 180 ℃ in one area, 220 ℃ in two areas, 230 ℃ in three areas, 225 ℃ in four areas, 220 ℃ in five areas, 210 ℃ in six areas, and the extrusion residence time is 10 minutes.
Test effect
In order to verify the specific use effect of the opening extrusion-assisted master batch for the heavy packaging film, the opening extrusion-assisted master batch is applied to an extrusion film blowing test of an inner film of a three-layer co-extrusion film blowing machine, and metallocene linear low-density polyethylene mLLDPE and linear low-density polyethylene LLDPE 1 are used as base materials: 1, wherein the melt index of the mLLDPE is 0.5g/10min (190 ℃,2.16 kg), the melt index of the LLDPE is 2.0g/10min (190 ℃,2.16 kg), the addition amount of the extrusion-assisted opening masterbatch is calculated according to the amount of the opening agent accounting for 0.5% of the total mass of the matrix resin, the four-stage extrusion temperature is 225 ℃,235 ℃,230 ℃,220 ℃, the screw speed is 150rpm, the film width is 500mm, and the film thickness is 40 mu m.
Wherein, the comparative example 1 is a heavy packaging film inner layer film produced by singly using two base materials of mLLDPE and LLDPE without adding any auxiliary agent; comparative example 2 is a heavy packaging film inner layer film produced by adding a commercially available polyethylene film opening master batch and a polyethylene film extrusion-assisting master batch to two base materials, namely mLLDPE and LLDPE. Wherein the main component of the commercially available polyethylene film opening master batch is a silica opening agent, the average particle size of the silica opening agent is 7 mu m, the content is 30 percent, the melt flow rate of the opening master batch is 3.14g/10min (2.16 kg,190 ℃) and the density is 1.108g/cm 3 Wherein the main component of the commercial polyethylene film extrusion-assisting master batch is fluorine-containing processing-assisting additive PPAThe content was 5%, the melt flow rate of the extrusion-assisting masterbatch was 2.57g/10min (2.16 kg,190 ℃ C.) and the density was 0.927g/10min. Wherein the addition amount of the opening master batch is calculated according to the proportion that the opening agent accounts for 0.5 percent of the total mass of the matrix resin, and the extrusion-assisting master batch is calculated according to the proportion that the fluorine-containing extrusion-assisting auxiliary PPA accounts for 0.1 percent of the total mass of the matrix resin.
Test sample 1 and test sample 2 are heavy packaging film inner layer films produced by using two base materials, namely mLLDPE and LLDPE and using an opening extrusion-assisted master batch synthesized by the formulas and the process conditions of examples 1 and 2 as an external additive. The film samples were tested for blocking force, coefficient of friction, haze and extrusion per unit time.
Film blocking force was tested according to GB/T16276-1996;
the friction coefficient of the film is tested according to GB/T10006-2021;
film haze was tested according to GB/T2410-2008;
the extrusion amount per unit time was measured by a method for measuring the extrusion weight in a calibrated time.
The specific test results are shown in table 1 below:
table 1 test results
From the test results, the film adhesion force of the inner layer film product of the heavy packaging film added with the opening extrusion assisting masterbatch for the heavy packaging film synthesized in the example 1 and the example 2 is lower than that of the comparative example 1 without adding any auxiliary agent and the comparative example 2 with the commercially available opening masterbatch and extrusion assisting masterbatch, the dynamic/static friction coefficient of the film is higher than that of the comparative example 1 and the comparative example 2, and the opening performance of the heavy packaging film product can be obviously improved by applying the opening extrusion assisting masterbatch related to the patent to the heavy packaging film product, and on the other hand, the haze of the inner layer film product of the heavy packaging film added with the opening extrusion assisting masterbatch for the heavy packaging film synthesized in the example 1 and the example 2 is lower than that of the comparative example 1 and the comparative example 2, the extrusion quality per hour is higher than that of the comparative example 1 and the comparative example 2, and the surface quality of the film can be obviously improved by applying the opening extrusion assisting masterbatch related to the patent to the heavy packaging film product, the production efficiency is improved, and the processing energy consumption is reduced.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (10)
1. The extrusion-assisted master batch for the packaging film is characterized by comprising the following components in parts by mass:
linear low density polyethylene LLDPE:90-100 parts
And (3) an opening agent: 20-50 parts
Fluorine-containing co-processing aid PPA:4.5-9.5 parts
Dispersing agent: 2-12 parts
Coupling agent: 0.5-2 parts
And (3) a lubricant: 0.2-1 part
Slip agent: 0.05-0.2 part
An antioxidant: 0.5-1.2 parts
The linear low-density polyethylene LLDPE has a melt index of 2-10 g/10min under the conditions of the test condition of 190 ℃ and 2.16 kg;
the opening agent is aerogel silicon dioxide opening agent; silica SiO in the aerogel silica opening agent 2 The content is more than or equal to 99 percent, the average grain diameter is 2.5-10 mu m, the water content is less than or equal to 1 percent, the oil absorption value is 115-200mL/100g, the whiteness is more than or equal to 95, and the ferric oxide Fe is 2 O 3 The content is less than or equal to 0.01 percent;
the fluorine-containing processing aid PPA is hexafluoropropylene-vinylidene fluoride-tetrafluoroethylene copolymer.
2. The extrusion-assisted opening masterbatch for a heavy packaging film according to claim 1, wherein the dispersing agent is any one of ethylene bis-stearamide EBS, paraffin oil, and polyethylene wax.
3. The extrusion-assisted opening masterbatch for a heavy packaging film according to claim 1, wherein the coupling agent is one or a mixture of two or more of a silane coupling agent, a titanate coupling agent and an aluminate coupling agent.
4. The extrusion-assisted opening masterbatch for a heavy packaging film according to claim 1, wherein the lubricant is one or a mixture of two or more of zinc stearate, calcium stearate and barium stearate.
5. The extrusion-assisted opening masterbatch for a heavy packaging film according to claim 1, characterized in that the slipping agent is one or a mixture of two of oleamide and erucamide.
6. The extrusion-assisted opening masterbatch for a heavy packaging film according to claim 1, characterized in that the antioxidant is a mixture of hindered phenolic antioxidants and phosphite antioxidants.
7. The extrusion-assisted opening masterbatch for a heavy packaging film according to claim 6, characterized in that the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant is 1:1-1:3.
8. a method for preparing the extrusion-assisted masterbatch for the opening of the repackaging film according to any one of claims 1 to 7, characterized by comprising the following steps: weighing linear low-density polyethylene, a silicon dioxide opening agent, a fluorine-containing processing aid PPA, a dispersing agent, a coupling agent, a lubricant, a slipping agent and an antioxidant according to the mass ratio, premixing the materials to be uniform by using a high-speed mixer, and then placing the premixed materials into a double-screw extruder for melt blending extrusion, cooling and granulating to obtain an opening extrusion-assisting master batch for the heavy packaging film; wherein the temperature of the twin-screw extruder is set to be 150-180 ℃ in the first area, 200-220 ℃ in the second area, 210-230 ℃ in the third area, 205-225 ℃ in the fourth area, 200-220 ℃ in the fifth area and 185-210 ℃ in the six-area die head, and the extrusion residence time is 3-10 minutes.
9. A method of using the extrusion-assisted masterbatch for packaging film prepared by the preparation method of claim 8, wherein the extrusion-assisted masterbatch for packaging film is applied to the inner layer preparation of packaging film product.
10. The method for using the extrusion-assisted opening masterbatch for a heavy packaging film according to claim 9, wherein the addition amount of the extrusion-assisted opening masterbatch for the heavy packaging film is 0.3-0.8% of the total mass of the matrix resin prepared by the heavy packaging film.
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