CN113185763A - Anti-static shielding material and preparation method thereof - Google Patents
Anti-static shielding material and preparation method thereof Download PDFInfo
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- CN113185763A CN113185763A CN202110497686.XA CN202110497686A CN113185763A CN 113185763 A CN113185763 A CN 113185763A CN 202110497686 A CN202110497686 A CN 202110497686A CN 113185763 A CN113185763 A CN 113185763A
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- 239000000463 material Substances 0.000 title claims abstract description 113
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000010410 layer Substances 0.000 claims abstract description 199
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 95
- 238000012545 processing Methods 0.000 claims abstract description 49
- 239000006258 conductive agent Substances 0.000 claims abstract description 28
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 28
- 238000001125 extrusion Methods 0.000 claims abstract description 23
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 85
- 239000003963 antioxidant agent Substances 0.000 claims description 47
- 230000003078 antioxidant effect Effects 0.000 claims description 47
- 239000007822 coupling agent Substances 0.000 claims description 43
- -1 polyethylene Polymers 0.000 claims description 30
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims description 27
- 239000004209 oxidized polyethylene wax Substances 0.000 claims description 27
- 239000002994 raw material Substances 0.000 claims description 27
- 239000000843 powder Substances 0.000 claims description 25
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 24
- 239000004698 Polyethylene Substances 0.000 claims description 18
- 239000004743 Polypropylene Substances 0.000 claims description 16
- 229920001155 polypropylene Polymers 0.000 claims description 16
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 15
- 239000000806 elastomer Substances 0.000 claims description 15
- 239000002270 dispersing agent Substances 0.000 claims description 14
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- 229920001296 polysiloxane Polymers 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000002041 carbon nanotube Substances 0.000 claims description 10
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 10
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 8
- 238000010096 film blowing Methods 0.000 claims description 7
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 6
- 229920001912 maleic anhydride grafted polyethylene Polymers 0.000 claims description 6
- 238000010345 tape casting Methods 0.000 claims description 6
- 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 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 5
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 5
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 claims description 5
- 229920002647 polyamide Polymers 0.000 claims description 5
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 5
- 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 claims description 4
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
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- HXAWLCVHIQHDLB-UHFFFAOYSA-N 3-(2-carboxyethylsulfanyl)propanoic acid;octadecyl 3-(3-octadecoxy-3-oxopropyl)sulfanylpropanoate Chemical compound OC(=O)CCSCCC(O)=O.CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC HXAWLCVHIQHDLB-UHFFFAOYSA-N 0.000 description 1
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003508 Dilauryl thiodipropionate Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000004423 acyloxy group Chemical group 0.000 description 1
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- 235000019304 dilauryl thiodipropionate Nutrition 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
Classifications
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
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- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
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- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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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
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- C08K2201/001—Conductive additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
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- Laminated Bodies (AREA)
Abstract
The invention provides an antistatic shielding material and a preparation method thereof, and the technical scheme of the invention is that polyolefin resin is used as a base material, a conductive agent with similar compatibility with the base material is added, and the antistatic shielding material (blown film or cast film) with an antistatic layer and a heat sealing layer is formed by co-extrusion at one step, so that the antistatic shielding material does not need to be sprayed externally, the processing temperature is high, the surface resistivity and the ESD risk of the antistatic shielding material are reduced, the antistatic shielding material also has better antistatic performance even in a low-humidity environment, and the antistatic effect is stable. The antistatic layer has lasting and stable antistatic property, can block pollution and resist physical loss, thereby playing a role in protection; the anti-static shielding material has no glue component, uses the same or compatible materials, can be recycled, and is green and environment-friendly.
Description
Technical Field
The invention relates to the technical field of anti-static shielding materials, in particular to an anti-static shielding material and a preparation method thereof.
Background
Along with the continuous development of the electronic industry, electronic products are widely applied to every corner of production and life of people, the integration level and the precision of components are continuously improved, the components are also more sensitive to static electricity, and the static sensitive components need to be packaged by an anti-static shielding bag in the transfer process so as to avoid the damage of the components caused by static discharge.
The traditional antistatic shielding bag mainly used in the market is prepared by compounding PET (polyethylene terephthalate) aluminized film glue with a PE (polyethylene) film and then coating the surface with antistatic agent, and the antistatic agent is added in the antistatic agent on the PE layer. However, the surface resistance of the anti-Static shielding bag is high and unstable, and particularly in an environment with relatively low humidity, the risk of electrostatic discharge (ESD) is relatively high, and the anti-Static performance is poor.
Disclosure of Invention
The invention mainly aims to provide an anti-static shielding material and a preparation method thereof, and aims to reduce the surface resistivity and ESD risk of the anti-static shielding material and improve the anti-static performance.
In order to achieve the purpose, the anti-static shielding material provided by the invention comprises an anti-static layer and a heat sealing layer, wherein the anti-static layer comprises the following raw material components in parts by weight: 30-100 parts of polyolefin resin, 1-5 parts of compatibilizer, 7.2-70 parts of conductive agent, 0.2-2.0 parts of antioxidant and 0.1-2.0 parts of coupling agent; the heat sealing layer comprises the following raw material components: 30-95 parts of polyolefin resin, 1-5 parts of compatibilizer, 3-90 parts of conductive agent, 0.2-2.0 parts of antioxidant and 0.1-2.0 parts of coupling agent.
In one embodiment, the antistatic layer comprises the following raw material components: 36-100 parts of polyolefin resin, 2.0-2.5 parts of compatibilizer, 7.2-65 parts of conductive agent, 0.5-1.0 part of antioxidant and 0.3-1.0 part of coupling agent; the heat sealing layer comprises the following raw material components: 36-92 parts of polyolefin resin, 2.0-2.5 parts of compatibilizer, 5.6-60.0 parts of conductive agent, 0.5-1.0 part of antioxidant and 0.3-1.0 part of coupling agent.
In one embodiment, the antistatic shielding material further comprises a shielding layer, wherein the shielding layer is positioned between the antistatic layer and the heat sealing layer, and the shielding layer comprises the following raw material components in parts by weight: 60-80 parts of polyolefin resin, 1-8 parts of compatibilizer, 8-35 parts of conductive agent, 0.5-2.5 parts of antioxidant and 0.1-3.0 parts of coupling agent.
In one embodiment, the polyolefin resin comprises one or more of polyethylene, polypropylene, polyethylene elastomer, polypropylene elastomer, ultra high molecular weight polyethylene, metallocene polypropylene, hydrogenated styrene-butadiene block copolymer.
In one embodiment, the compatibilizer comprises one or more of oxidized polyethylene wax, maleic anhydride grafted polyethylene, maleic anhydride grafted oxidized polyethylene wax, silicone powder, PPA powder, maleic anhydride grafted polypropylene, polyamide elastomer; the antioxidant comprises at least one of antioxidant 1010, antioxidant DLTP, antioxidant DSTP and antioxidant 168.
In one embodiment, the conductive agent includes one of conductive masterbatch, superconducting carbon black, and carbon nanotube.
In one embodiment, the coupling agent in the antistatic layer and the heat sealing layer comprises one or two of titanate coupling agent and silane coupling agent; the coupling agent in the shielding layer comprises at least one of a titanate coupling agent, a silane coupling agent and a coupling dispersant for a conductive material.
In one embodiment, the antistatic layer accounts for 10% to 60% of the weight of the antistatic shielding material, the shielding layer accounts for 10% to 50% of the weight of the antistatic shielding material, and the heat sealing layer accounts for 5% to 40% of the weight of the antistatic shielding material.
The invention also provides a preparation method of the anti-static shielding material, which is used for preparing the anti-static shielding material and comprises the following steps:
processing the master batch: respectively mixing and granulating the antistatic layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches and heat-sealing layer master batches;
extruding: co-extruding and film-blowing the obtained antistatic layer master batch and the heat-sealing layer master batch to form an antistatic shielding material; wherein the processing temperature of the antistatic layer master batch is 170-220 ℃, the processing temperature of the heat sealing layer master batch is 170-210 ℃, and the extrusion amount ratio of the antistatic layer to the heat sealing layer is 0.8-1.2: 0.6-0.9.
The invention also provides a preparation method of the anti-static shielding material, which is used for preparing the anti-static shielding material and comprises the following steps:
processing the master batch: respectively mixing and granulating the antistatic layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches and heat-sealing layer master batches;
extruding: co-extruding and tape-casting the obtained antistatic layer master batch and the obtained heat-seal layer master batch to obtain an antistatic shielding material; wherein the processing temperature of the antistatic layer master batch is 240-320 ℃, the processing temperature of the heat sealing layer master batch is 240-320 ℃, and the extrusion amount ratio of the antistatic layer to the heat sealing layer is 0.8-1.2: 0.6-0.9.
According to the technical scheme, the polyolefin resin is used as the base material, the conductive agent with similar compatibility with the base material is added, and the anti-static shielding material (blown film or cast film) with the anti-static layer and the heat sealing layer is formed in a co-extrusion one-step mode, so that the anti-static shielding material does not need to be sprayed with the anti-static agent, is high in processing temperature, reduces the surface resistivity and the ESD risk of the anti-static shielding material, has good anti-static performance even in a low-humidity environment, and is stable in anti-static effect. The antistatic layer has lasting and stable antistatic property, can block pollution and resist physical loss, thereby playing a role in protection; the anti-static shielding material has no glue component, uses the same or compatible materials, can be recycled, and is green and environment-friendly.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an anti-static shielding material and a preparation method thereof.
In the embodiment of the invention, the antistatic shielding material comprises an antistatic layer and a heat sealing layer, wherein the antistatic layer comprises the following raw material components in parts by weight: 30-100 parts of polyolefin resin, 1-5 parts of compatibilizer, 7.2-70 parts of conductive agent, 0.2-2.0 parts of antioxidant and 0.1-2.0 parts of coupling agent; the heat sealing layer comprises the following raw material components: 30-95 parts of polyolefin resin, 1-5 parts of compatibilizer, 3-90 parts of conductive agent, 0.2-2.0 parts of antioxidant and 0.1-2.0 parts of coupling agent.
Specifically, the anti-static shielding material can be an anti-static shielding film or an anti-static shielding sheet, and is applied to an anti-static shielding bag, an anti-static shielding packaging body and the like, so that a static sensitive component is wrapped, and the component is prevented from being damaged due to static discharge.
This antistatic backing can regard as outer layer structure, through the mode (add in the preparation material) of interior interpolation conducting agent to in time derive static, for example at transportation friction production static, avoid static to accumulate, prevent effectively that static from releasing in a large number and damaging components and parts, make antistatic shielding material even under the environment of low humidity, its antistatic effect is stable.
This heat-seal layer can regard as inner layer structure, and similarly, through adding the conductive agent in inner layer structure, derive the transportation because components and parts rock with this antistatic shielding material between the static that produces, in time derive the static, avoid static to accumulate, avoid static to release in a large number and damage components and parts, prevent the ESD risk, can also keep antistatic effect under low humidity simultaneously.
Further, the anti-static shielding material also comprises a shielding layer, wherein the shielding layer is positioned between the anti-static layer and the heat sealing layer, and comprises the following raw material components in parts by weight: 60-80 parts of polyolefin resin, 1-8 parts of compatibilizer, 8-35 parts of conductive agent, 0.5-2.5 parts of antioxidant and 0.1-3.0 parts of coupling agent.
The shielding layer is arranged between the anti-static layer and the heat sealing layer, and adopts polyolefin resin, conductive agent, compatibilizer and the like to provide electrostatic shielding performance and shield electrostatic field and electrostatic discharge. In addition, the anti-static shielding material can also comprise a functional layer, and the functional layer is positioned between the anti-static layer and the shielding layer or between the shielding layer and the heat sealing layer and plays a role in increasing elasticity, blocking pollution, blocking moisture, blocking gas and the like.
In one embodiment, the antistatic shielding material sequentially comprises an antistatic layer, a shielding layer and a heat sealing layer, wherein the antistatic layer comprises the following raw material components in parts by weight: 36-100 parts of polyolefin resin, 2.0-2.5 parts of compatibilizer, 7.2-65 parts of conductive agent, 0.5-1.0 part of antioxidant and 0.3-1.0 part of coupling agent; the shielding layer comprises the following components: 61-75 parts of polyolefin resin, 2.0-5.8 parts of compatibilizer, 18-26 parts of conductive agent, 1.0-1.5 parts of antioxidant and 0.3-2.5 parts of coupling agent; the heat sealing layer comprises the following raw material components: 36-92 parts of polyolefin resin, 2.0-2.5 parts of compatibilizer, 5.6-60.0 parts of conductive agent, 0.5-1.0 part of antioxidant and 0.3-1.0 part of coupling agent.
Specifically, the polyolefin resin comprises one or more of polyethylene, polypropylene, polyethylene elastomer, polypropylene elastomer, ultrahigh molecular weight polyethylene, metallocene polypropylene and hydrogenated styrene-butadiene block copolymer. The polyolefin resin has good comprehensive properties including mechanical property, heat resistance, wear resistance, mechanical strength, rigidity, toughness, mechanical shock absorption and chemical resistance, thereby protecting components.
The polyolefin resin of the antistatic layer can be one or more of polyethylene, polypropylene, polyethylene elastomer, polypropylene elastomer, ultrahigh molecular weight polyethylene, metallocene polyethylene and metallocene polypropylene; the polyolefin resin of the shielding layer can be one or two of polyethylene and polypropylene; the polyolefin resin of the heat sealing layer can be one or more of polyethylene, polypropylene, polyethylene elastomer, polypropylene elastomer, ultrahigh molecular weight polyethylene, metallocene polyethylene and metallocene polypropylene.
Specifically, the compatibilizer comprises one or more of oxidized polyethylene wax, maleic anhydride grafted polyethylene, maleic anhydride grafted oxidized polyethylene wax, silicone powder, PPA (Polyphthalamide) powder, maleic anhydride grafted polypropylene and polyamide elastomer. By adding the compatibilizer, the interfacial energy between phases is reduced, the dispersion degree of a dispersed phase is improved, the interfacial adhesion is improved, and incompatible different polymers are combined into a whole, so that a stable blend is obtained.
The compatibilizer of the antistatic layer can be one or more of oxidized polyethylene wax, maleic anhydride grafted polyethylene, silicone powder, PPA powder, maleic anhydride grafted polypropylene and polyamide elastomer; the compatibilizer of the shielding layer can be one or more of oxidized polyethylene wax, silicone powder, PPA powder and maleic anhydride grafted polyethylene; the compatibilizer of the heat sealing layer can be one or more of oxidized polyethylene wax, maleic anhydride grafted polyethylene, silicone powder, PPA powder, maleic anhydride grafted polypropylene and polyamide elastomer.
Specifically, the conductive agent comprises one of conductive master batch, superconducting carbon black and carbon nano tube. The conductive material of the conductive master batch can be doped polythiophene, polypyrrole, nano silver powder and nano copper powder. The conductive agent with similar compatibility with the polyolefin resin is added, so that the subsequent extrusion process is facilitated, the static charges accumulated on the surface of the anti-static shielding material can be led out, the charges on the surface of the anti-static shielding material are eliminated, the surface resistivity and the ESD risk of the anti-static shielding material are reduced, and the anti-static performance is improved.
Specifically, the antioxidant comprises at least one of antioxidant 1010, antioxidant DLTP, antioxidant DSTP and antioxidant 168. The antioxidant 1010 (tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester) has good antioxidant performance, prevents thermal oxidation degradation of the material in a long-term aging process, and can effectively prolong the service life. The antioxidant DLTP (Dilauryl thiodipropionate) also has good oxidation resistance, and the antioxidant DSTP (distearyl thiodipropionate 3,3' -thiodipropionate) has higher oxidation resistance than the antioxidant DLTP, is nonflammable and has good stability. The antioxidant 168(Tns- (2, 4-di-tert-butyl) -phosphate, tris [2, 4-di-tert-butylphenyl ] phosphite) can significantly improve the photostability of the material.
Specifically, the coupling agent comprises one or more of a titanate coupling agent, a silane coupling agent and a coupling dispersant for conductive materials. The titanate coupling agent is divided into a monoalkoxy type, a monoalkoxy pyrophosphate type, an integral type and a coordination body type, and can comprise isopropyl dioleate acyloxy (dioctyl phosphate acyloxy) titanate, isopropyl tri (dioctyl phosphate acyloxy) titanate, isopropyl triisostearate titanate, bis (dioctyl pyrophosphate acyl) ethylene titanate, tetraisopropyl di (dioctyl phosphate acyloxy) titanate and the like. The silane coupling agent may be vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris (. beta. -methoxyethoxy) silane, or the like. The coupling agent can couple material interfaces with greatly different properties, thereby improving the performance of the composite material and increasing the bonding strength. Wherein, the coupling agent in the antistatic layer and the heat sealing layer comprises one or two of titanate coupling agent and silane coupling agent; the coupling agent in the shielding layer comprises at least one of titanate coupling agent, silane coupling agent and coupling dispersant for conductive materials. The coupling dispersant for the conductive material has the advantages of strong activity and good affinity, can form coating on the surfaces of conductive agents such as conductive master batches, superconducting carbon black, carbon nano tubes and the like, better disperses the conductive agents, prevents agglomeration, enables the conductive agents to be uniformly dispersed in a plastic matrix, forms a conductive network, and improves the conductivity.
The weight of each layer in the antistatic shielding material can be the same or different. In one embodiment, the antistatic layer accounts for 10% to 60% of the weight of the antistatic shielding material, the shielding layer accounts for 10% to 50% of the weight of the antistatic shielding material, and the heat sealing layer accounts for 5% to 40% of the weight of the antistatic shielding material. The anti-physical damage performance of the anti-static shielding material can be improved by increasing the weight of the anti-static layer and blocking pollution.
According to the technical scheme, the polyolefin resin is used as the base material, the conductive agent with similar compatibility with the base material is added, and the anti-static shielding material (blown film or cast film) with the anti-static layer and the heat sealing layer is formed in a co-extrusion one-step mode, so that the anti-static shielding material does not need to be sprayed with the anti-static agent, is high in processing temperature, reduces the surface resistivity and the ESD risk of the anti-static shielding material, has good anti-static performance even in a low-humidity environment, and is stable in anti-static effect. The antistatic layer has lasting and stable antistatic property, can block pollution and resist physical loss, thereby playing a role in protection; the anti-static shielding material has no glue component, uses the same or compatible materials, can be recycled, and is green and environment-friendly.
The invention also provides a preparation method of the anti-static shielding material, which is used for preparing the anti-static shielding material and comprises the following steps:
processing the master batch: respectively mixing and granulating the antistatic layer, the shielding layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches, shielding layer master batches and heat-sealing layer master batches;
extruding: co-extruding and film-blowing the obtained antistatic layer master batch, the shielding layer master batch and the heat-sealing layer master batch to form an antistatic shielding material; wherein the processing temperature of the antistatic layer master batch is 170-220 ℃, the processing temperature of the shielding layer master batch is 180-230 ℃, the processing temperature of the heat sealing layer master batch is 170-210 ℃, and the extrusion amount ratio of the antistatic layer, the shielding layer and the heat sealing layer is 0.8-1.2: 0.5-0.8: 0.6-0.9.
It is understood that the processing step of the masterbatch may be by single screw and/or twin screw dispersion granulation. The preparation method of the anti-static shielding material adopts a three-layer film blowing process, and the anti-static shielding material is obtained by multi-layer film co-extrusion one-step molding.
The invention also provides a preparation method of the anti-static shielding material, which is used for preparing the anti-static shielding material and comprises the following steps:
processing the master batch: respectively mixing and granulating the antistatic layer, the shielding layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches, shielding layer master batches and heat-sealing layer master batches;
extruding: co-extruding and tape-casting the obtained antistatic layer master batch, the shielding layer master batch and the heat-sealing layer master batch to obtain an antistatic shielding material; wherein the processing temperature of the antistatic layer master batch is 240-320 ℃, the processing temperature of the shielding layer master batch is 240-320 ℃, the processing temperature of the heat sealing layer master batch is 240-320 ℃, and the extrusion amount ratio of the antistatic layer, the shielding layer and the heat sealing layer is 0.8-1.2: 0.5-0.8: 0.6-0.9.
Likewise, the processing step of the masterbatch may be dispersion granulated by single screw and/or twin screw. Different from the preparation method, the preparation method of the anti-static shielding material adopts a three-layer casting production process, the anti-static shielding material is obtained through multi-layer film co-extrusion one-step molding, and the one-step molding cost is low.
Embodiments of the present invention will be described in detail below with reference to specific examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The anti-static shielding material sequentially comprises an anti-static layer, a shielding layer and a heat sealing layer, wherein the anti-static layer comprises the following components in parts by weight: 47.4 parts of high-density polyethylene, 20 parts of low-density polyethylene, 20 parts of linear low-density polyethylene, 8.8 parts of superconducting carbon black, 2 parts of oxidized polyethylene wax, 1 part of antioxidant, 0.5 part of PPA powder and 0.3 part of titanate coupling agent;
the shielding layer comprises the following components: 10 parts of high-density polyethylene, 20 parts of low-density polyethylene, 36 parts of linear low-density polyethylene, 25 parts of superconducting carbon black, 4 parts of oxidized polyethylene wax, 1.5 parts of antioxidant, 0.8 part of PPA powder, 1 part of maleic anhydride grafted oxidized polyethylene wax, 0.5 part of titanate coupling agent and 2 parts of coupling dispersant for conductive materials; in the embodiment, the coupling dispersant for the conductive material adopts YY-502A dispersant of Guangzhou Yuntai synthetic material Co., Ltd;
the heat-sealing layer comprises the following components: 40 parts of high-density polyethylene, 17.3 parts of low-density polyethylene, 10 parts of linear low-density polyethylene, 20 parts of metallocene polyethylene, 8.9 parts of superconducting carbon black, 2 parts of oxidized polyethylene wax, 1.0 part of antioxidant, 0.5 part of PPA powder and 0.3 part of titanate coupling agent.
The preparation method of the antistatic shielding material comprises the following steps:
processing the master batch: respectively mixing and granulating the antistatic layer, the shielding layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches, shielding layer master batches and heat-sealing layer master batches;
extruding: and (3) carrying out co-extrusion film blowing molding on the obtained antistatic layer master batch, the shielding layer master batch and the heat sealing layer master batch to obtain the antistatic shielding material. Wherein the processing temperature of the antistatic layer master batch is 190-200 ℃, the processing temperature of the shielding layer master batch is 200-210 ℃, the processing temperature of the heat sealing layer master batch is 190 ℃, and the die head temperature is 200 ℃. The extrusion weight ratio of the antistatic layer, the shielding layer and the heat sealing layer is 1: 1, the total thickness of the antistatic shielding material is 35-70 microns, and the resistance of the shielding layer is 102-3Omega, less than 1X 104Omega, the resistance of the shielding layer is relatively low.
Example 2
The anti-static shielding material sequentially comprises an anti-static layer, a shielding layer and a heat sealing layer, wherein the anti-static layer comprises the following components in parts by weight: 47.4 parts of high-density polyethylene, 22.3 parts of low-density polyethylene, 20 parts of linear low-density polyethylene, 8 parts of carbon nano tube, 1 part of maleic anhydride grafted oxidized polyethylene wax, 1 part of silicone powder, 1 part of antioxidant, 0.5 part of PPA powder and 0.3 part of silane coupling agent;
the shielding layer comprises the following components: 10 parts of high-density polyethylene, 25 parts of low-density polyethylene, 40 parts of linear low-density polyethylene, 20 parts of carbon nano tube, 2 parts of silicone powder, 1.5 parts of antioxidant, 0.8 part of PPA powder, 3 parts of maleic anhydride grafted oxidized polyethylene wax, 0.5 part of silane coupling agent and 2 parts of coupling dispersant for conductive materials; in the embodiment, the coupling dispersant for the conductive material adopts YY-502A dispersant of Guangzhou Yuntai synthetic material Co., Ltd;
the heat-sealing layer comprises the following components: 40 parts of high-density polyethylene, 19.2 parts of low-density polyethylene, 10 parts of linear low-density polyethylene, 20 parts of metallocene polyethylene, 7 parts of carbon nano tube, 2 parts of oxidized polyethylene wax, 1.0 part of antioxidant, 0.5 part of PPA powder and 0.3 part of titanate coupling agent.
The preparation method of the antistatic shielding material comprises the following steps:
processing the master batch: respectively mixing and granulating the antistatic layer, the shielding layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches, shielding layer master batches and heat-sealing layer master batches;
extruding: and (3) carrying out co-extrusion film blowing molding on the obtained antistatic layer master batch, the shielding layer master batch and the heat sealing layer master batch to obtain the antistatic shielding material. Wherein the processing temperature of the antistatic layer master batch is 190-200 ℃, the processing temperature of the shielding layer master batch is 200-210 ℃, the processing temperature of the heat sealing layer master batch is 190 ℃, and the die head temperature is 200 ℃. The extrusion weight ratio of the antistatic layer, the shielding layer and the heat sealing layer is 1: 1, the total thickness of the antistatic shielding material is 35-70 microns, and the resistance of the shielding layer is 102-3Omega, less than 1X 104Omega, the resistance of the shielding layer is relatively low.
Example 3
The anti-static shielding material sequentially comprises an anti-static layer, a shielding layer and a heat sealing layer, wherein the anti-static layer comprises the following components in parts by weight: 20 parts of high-density polyethylene, 16 parts of linear low-density polyethylene, 60 parts of conductive PE master batch, 2 parts of silicone powder, 1 part of antioxidant and 1 part of silane coupling agent;
the shielding layer comprises the following components: 24 parts of high-density polyethylene, 20 parts of low-density polyethylene, 27.4 parts of linear low-density polyethylene, 25.2 parts of superconducting carbon black, 3 parts of oxidized polyethylene wax, 1 part of antioxidant, 0.5 part of PPA powder and 0.3 part of titanate coupling agent;
the heat-sealing layer comprises the following components: 20 parts of high-density polyethylene, 16 parts of linear low-density polyethylene, 60 parts of conductive PE master batch, 2 parts of silicone powder, 1 part of antioxidant and 1 part of silane coupling agent.
The preparation method of the antistatic shielding material comprises the following steps:
processing the master batch: respectively mixing and granulating the antistatic layer, the shielding layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches, shielding layer master batches and heat-sealing layer master batches;
extruding: co-extruding and film-blowing the obtained antistatic layer master batch, the shielding layer master batch and the heat sealing layer master batch to obtain the antistatic shielding materialAnd (5) feeding. Wherein the processing temperature of the antistatic layer master batch is 190-200 ℃, the processing temperature of the shielding layer master batch is 200-210 ℃, the processing temperature of the heat sealing layer master batch is 190 ℃, and the die head temperature is 200 ℃. The extrusion weight ratio of the antistatic layer, the shielding layer and the heat sealing layer is 5: 3: 4, the total thickness of the antistatic shielding material is 35-70 microns, and the resistance of the shielding layer is 102-3Omega, less than 1X 104Omega, the resistance of the shielding layer is relatively low.
Example 4
The anti-static shielding material sequentially comprises an anti-static layer, a shielding layer and a heat sealing layer, wherein the anti-static layer comprises the following components in parts by weight: 30 parts of high-density polyethylene, 20 parts of low-density polyethylene, 49.5 parts of linear low-density polyethylene, 7.2 parts of superconducting carbon black, 2 parts of oxidized polyethylene wax, 1 part of antioxidant and 0.3 part of titanate coupling agent;
the shielding layer comprises the following components: 10 parts of high-density polyethylene, 10 parts of low-density polyethylene, 50 parts of linear low-density polyethylene, 21 parts of superconducting carbon black, 4 parts of oxidized polyethylene wax, 1.5 parts of antioxidant, 1 part of maleic anhydride grafted oxidized polyethylene wax, 0.5 part of titanate coupling agent and 2 parts of coupling dispersant for conductive materials; in the embodiment, the coupling dispersant for the conductive material adopts YY-502A dispersant of Guangzhou Yuntai synthetic material Co., Ltd;
the heat-sealing layer comprises the following components: 20 parts of high-density polyethylene, 18.5 parts of low-density polyethylene, 50 parts of linear low-density polyethylene, 7.2 parts of superconducting carbon black, 2 parts of oxidized polyethylene wax, 1.0 part of antioxidant and 0.3 part of titanate coupling agent.
The preparation method of the antistatic shielding material comprises the following steps:
processing the master batch: respectively mixing and granulating the antistatic layer, the shielding layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches, shielding layer master batches and heat-sealing layer master batches;
extruding: and carrying out co-extrusion tape casting on the obtained antistatic layer master batch, the shielding layer master batch and the heat sealing layer master batch to obtain the antistatic shielding material. Wherein the processing temperature of the antistatic layer master batch is 250-300 ℃, the processing temperature of the shielding layer master batch is 250-310 ℃, and the heat sealing layer master batchThe processing temperature of the pellets is 250 ℃ to 300 ℃ and the die temperature is 280 ℃. The extrusion amount ratio of the antistatic layer, the shielding layer and the heat sealing layer is 1: 1, the total thickness of the antistatic shielding material is 35-80 microns, and the resistance of the shielding layer is 102-3Omega, less than 1X 104Omega, the resistance of the shielding layer is relatively low.
Example 5
The anti-static shielding material sequentially comprises an anti-static layer, a shielding layer and a heat sealing layer, wherein the anti-static layer comprises the following components in parts by weight: 30 parts of high-density polyethylene, 20 parts of low-density polyethylene, 40 parts of linear low-density polyethylene, 8 parts of carbon nano tube, 2 parts of oxidized polyethylene wax, 1 part of antioxidant and 0.5 part of silane coupling agent;
the shielding layer comprises the following components: 10 parts of high-density polyethylene, 15 parts of low-density polyethylene, 50 parts of linear low-density polyethylene, 18 parts of carbon nano tube, 1 part of antioxidant, 2 parts of maleic anhydride grafted oxidized polyethylene wax, 3.4 parts of oxidized polyethylene wax and 0.6 part of silane coupling agent;
the heat-sealing layer comprises the following components: 20 parts of high-density polyethylene, 25.1 parts of low-density polyethylene, 46 parts of linear low-density polyethylene, 5.6 parts of carbon nano tube, 2 parts of oxidized polyethylene wax, 1.0 part of antioxidant and 0.3 part of titanate coupling agent.
The preparation method of the antistatic shielding material comprises the following steps:
processing the master batch: respectively mixing and granulating the antistatic layer, the shielding layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches, shielding layer master batches and heat-sealing layer master batches;
extruding: and carrying out co-extrusion tape casting on the obtained antistatic layer master batch, the shielding layer master batch and the heat sealing layer master batch to obtain the antistatic shielding material. Wherein the processing temperature of the antistatic layer master batch is 250-300 ℃, the processing temperature of the shielding layer master batch is 250-310 ℃, the processing temperature of the heat sealing layer master batch is 250-300 ℃, and the die head temperature is 270 ℃. The extrusion amount ratio of the antistatic layer, the shielding layer and the heat sealing layer is 1: 1, the total thickness of the antistatic shielding material is 35-80 microns, and the resistance of the shielding layer is 102-3Omega, less than 1X 104Omega, resistance comparison of the Shielding layersLow.
Example 6
The anti-static shielding material sequentially comprises an anti-static layer, a shielding layer and a heat sealing layer, wherein the anti-static layer comprises the following components in parts by weight: 30 parts of high-density polyethylene, 10 parts of low-density polyethylene, 21.5 parts of linear low-density polyethylene, 35.2 parts of conductive PE master batch, 2 parts of silicone powder, 1 part of antioxidant and 0.3 part of titanate coupling agent;
the shielding layer comprises the following components: 35 parts of low-density polyethylene, 41 parts of linear low-density polyethylene, 20 parts of superconducting carbon black, 2 parts of oxidized polyethylene wax, 1 part of antioxidant and 1 part of silane coupling agent;
the heat-sealing layer comprises the following components: 20 parts of high-density polyethylene, 11.5 parts of low-density polyethylene, 30 parts of linear low-density polyethylene, 35 parts of conductive PE master batch, 2 parts of oxidized polyethylene wax, 1.0 part of antioxidant and 0.3 part of titanate coupling agent.
The preparation method of the antistatic shielding material comprises the following steps:
processing the master batch: respectively mixing and granulating the antistatic layer, the shielding layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches, shielding layer master batches and heat-sealing layer master batches;
extruding: and carrying out co-extrusion tape casting on the obtained antistatic layer master batch, the shielding layer master batch and the heat sealing layer master batch to obtain the antistatic shielding material. Wherein the processing temperature of the antistatic layer master batch is 250-300 ℃, the processing temperature of the shielding layer master batch is 250-310 ℃, the processing temperature of the heat sealing layer master batch is 250-300 ℃, and the die head temperature is 270 ℃. The extrusion amount ratio of the antistatic layer, the shielding layer and the heat sealing layer is 1: 1, the total thickness of the antistatic shielding material is 35-80 microns, and the resistance of the shielding layer is 102-3Omega, less than 1X 104Omega, the resistance of the shielding layer is relatively low.
In order to verify various properties of the antistatic shielding material according to the present invention, the properties of the commercially available shielding bags of the above six examples, as well as two comparative examples, were tested. The results are referenced in tables 1 and 2 below:
TABLE 1 resistivity test results of products in different humidity environments
TABLE 2 Electrostatic Voltage test results for products at different humidities
According to the test data of Table 1, as can be seen from the internal and external surface resistivities of comparative examples 1 and 2, the internal and external surface resistivities of the comparative examples are more than 109And omega/sq, when the humidity is gradually reduced, the internal and external resistivity of the material is gradually increased, the resistivity is unstable, and the risk of ESD protection failure is caused. The outer surface resistivity and the inner surface resistivity of examples 1 to 6 were low, and the surface resistivity was less than 10 as the humidity decreased9And omega/sq shows that the antistatic shielding material has stable internal and external surface resistivity and is not influenced by humidity. Tests show that the surface resistivity of the antistatic shielding material is not attenuated within 5 to 10 years, and stable permanent antistatic performance which is not influenced by environment is realized.
According to the test data of table 2, the internal and external friction static voltages of examples 1 to 6 are significantly smaller than those of comparative examples 1 and 2, and the internal and external friction static voltages of the comparative examples show a rapid rise as a whole in the case of gradual decrease in humidity, which is very disadvantageous in antistatic effect. The external friction electrostatic voltage and the internal friction electrostatic voltage of examples 1 to 6 are kept consistent, and when the humidity is gradually reduced, although the internal friction electrostatic voltage and the external friction electrostatic voltage are increased, the increase range is small, the internal friction electrostatic voltage and the external friction electrostatic voltage are both less than 10V, and the overall stability is realized.
Therefore, the antistatic shielding material has low and stable surface resistance, has a good antistatic effect even in a low-humidity environment, reduces the risk of ESD, and improves the antistatic performance. While the surface resistivity of the commercially available shielding bags (comparative examples 1 and 2) increased significantly with decreasing humidity, the antistatic effect was lost.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The antistatic shielding material is characterized by comprising an antistatic layer and a heat sealing layer, wherein the antistatic layer comprises the following raw material components in parts by weight: 30-100 parts of polyolefin resin, 1-5 parts of compatibilizer, 7.2-70 parts of conductive agent, 0.2-2.0 parts of antioxidant and 0.1-2.0 parts of coupling agent;
the heat sealing layer comprises the following raw material components: 30-95 parts of polyolefin resin, 1-5 parts of compatibilizer, 3-90 parts of conductive agent, 0.2-2.0 parts of antioxidant and 0.1-2.0 parts of coupling agent.
2. The antistatic shielding material of claim 1 wherein the antistatic layer comprises the following raw material components: 36-100 parts of polyolefin resin, 2.0-2.5 parts of compatibilizer, 7.2-65 parts of conductive agent, 0.5-1.0 part of antioxidant and 0.3-1.0 part of coupling agent;
the heat sealing layer comprises the following raw material components: 36-92 parts of polyolefin resin, 2.0-2.5 parts of compatibilizer, 5.6-60.0 parts of conductive agent, 0.5-1.0 part of antioxidant and 0.3-1.0 part of coupling agent.
3. The antistatic shielding material of claim 2 further comprising a shielding layer, wherein the shielding layer is located between the antistatic layer and the heat sealing layer, and the shielding layer comprises the following raw material components in parts by weight: 60-80 parts of polyolefin resin, 1-8 parts of compatibilizer, 8-35 parts of conductive agent, 0.5-2.5 parts of antioxidant and 0.1-3.0 parts of coupling agent.
4. The antistatic shield material of claim 3 wherein the polyolefin resin comprises one or more of polyethylene, polypropylene, polyethylene elastomer, polypropylene elastomer, ultra high molecular weight polyethylene, metallocene polypropylene, hydrogenated styrene-butadiene block copolymer.
5. The antistatic shielding material of claim 3 wherein the compatibilizer comprises one or more of oxidized polyethylene wax, maleic anhydride grafted polyethylene, maleic anhydride grafted oxidized polyethylene wax, silicone powder, PPA powder, maleic anhydride grafted polypropylene, polyamide elastomer; the antioxidant comprises at least one of antioxidant 1010, antioxidant DLTP, antioxidant DSTP and antioxidant 168.
6. The antistatic shielding material of claim 3 wherein said conductive agent comprises one of conductive masterbatch, superconducting carbon black, carbon nanotubes.
7. The antistatic shielding material of claim 3 wherein the coupling agent in the antistatic layer and the heat seal layer comprises one or both of a titanate coupling agent, a silane coupling agent; the coupling agent in the shielding layer comprises at least one of a titanate coupling agent, a silane coupling agent and a coupling dispersant for a conductive material.
8. The antistatic shielding material of any one of claims 3 to 7 wherein the antistatic layer is 10 to 60% by weight of the antistatic shielding material, the shielding layer is 10 to 50% by weight of the antistatic shielding material, and the heat-sealing layer is 5 to 40% by weight of the antistatic shielding material.
9. A method for preparing an antistatic shielding material according to any one of claims 1 to 8, comprising the steps of:
processing the master batch: respectively mixing and granulating the antistatic layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches and heat-sealing layer master batches;
extruding: co-extruding and film-blowing the obtained antistatic layer master batch and the heat-sealing layer master batch to form an antistatic shielding material; wherein the processing temperature of the antistatic layer master batch is 170-220 ℃, the processing temperature of the heat sealing layer master batch is 170-210 ℃, and the extrusion amount ratio of the antistatic layer to the heat sealing layer is 0.8-1.2: 0.6-0.9.
10. A method for preparing an antistatic shielding material according to any one of claims 1 to 8, comprising the steps of:
processing the master batch: respectively mixing and granulating the antistatic layer and the heat-sealing layer according to required preparation raw materials to respectively obtain antistatic layer master batches and heat-sealing layer master batches;
extruding: co-extruding and tape-casting the obtained antistatic layer master batch and the obtained heat-seal layer master batch to obtain an antistatic shielding material; wherein the processing temperature of the antistatic layer master batch is 240-320 ℃, the processing temperature of the heat sealing layer master batch is 240-320 ℃, and the extrusion amount ratio of the antistatic layer to the heat sealing layer is 0.8-1.2: 0.6-0.9.
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