CN106554549B - A kind of polyethylene composition and antistatic film - Google Patents
A kind of polyethylene composition and antistatic film Download PDFInfo
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- CN106554549B CN106554549B CN201510628291.3A CN201510628291A CN106554549B CN 106554549 B CN106554549 B CN 106554549B CN 201510628291 A CN201510628291 A CN 201510628291A CN 106554549 B CN106554549 B CN 106554549B
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- 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
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- C08J5/18—Manufacture of films or sheets
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- 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
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- C08L2205/00—Polymer mixtures characterised by other features
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The present invention provides a kind of polyethylene composition and antistatic films.The polyethylene composition contains conductive filler, component A, component B and component C；Component A is the linear low density polyethylene of ethylene/alpha-olefin copolymerization, the melt index MI in the case where temperature is 190 DEG C, load is 2.16kgAFor 0.01-3.5g/10min, density pAFor 0.880-0.936g/cm3；Component B is the linear low density polyethylene of ethylene/alpha-olefin copolymerization, the melt index MI in the case where temperature is 190 DEG C, load is 2.16kgBFor 3.6-9.9g/10min, density pBFor 0.910-0.930g/cm3；Component C is the linear low density polyethylene of ethylene/alpha-olefin copolymerization, the melt index MI in the case where temperature is 190 DEG C, load is 2.16kgCFor 10-80g/10min, density pCFor 0.880-0.930g/cm3.When the polyethylene composition prepares polyethylene film using Flat film strength, not only stretching ratio is big, rate of film build is high, but also obtained film has preferable antistatic property.
Description
Technical field
The present invention relates to a kind of polyethylene composition and antistatic films.
Background technique
Biaxially-oriented polyethylene (Biaxially Oriented Polyethylene, BOPE) film is that have special point
Polyethylene (PE) resin of minor structure is through the molding thin-film material of stretch processes.BOPE film is blown than the extrusion of the prior art
Modeling technique and the polyethylene film for squeezing out casting technique production have greatly improved in terms of physical property, have mechanical strength
The advantages such as high, puncture resistance and shock resistance is good, excellent optical performance, heat sealability and the good, energy conservation and environmental protection of moisture resistance, especially
It is the performance that key performance remains to reach other polyethylene films in the case where thickness reduces 50%.Therefore, BOPE film can
It is widely used in packaging bag, again packaging bag, Vacuum Heat sealer, low temperature packaging film, composite membrane, medical and sanitary products, plastic film for agricultural use etc.
Aspect.
The processing method for being presently available for production Biaxial tension polyethylene film has Flat film strength and envelope pulling method, preceding
Person's technique is more mature, and has fast (the highest receipts of stretching ratio big (cross directional stretch multiplying power is up to 10 times or more), shaping speed
Speed is rolled up up to hundreds of ms/min), the advantages such as production efficiency height, and the mechanical strength of obtained film and optical property compared with
Good and the thickness uniformity is more preferably.However, film forming is influenced by process condition fluctuations when preparing film using Flat film strength
Also more significant, film stretch process difficulty is big, has higher requirement for film raw material.Therefore flat membrane stretching polyethylene is thin
Film has higher requirement for polyethylene raw material.Existing Biaxially-oriented polyethylene raw material is relatively suitable for envelope substantially and stretches legal system
Standby BOPE film, and will these existing polyethylene raw materials when preparing BOPE film using Flat film strength, it is poor that there are film formings
(tensile speed and stretching ratio are very low), film are easy to appear the defect of rupture, that is, are not suitable for substantially using Flat film strength system
Standby film.
Polyethylene is insulating materials, has nonpolar molecule structure, and the strand being made of covalent bond can neither ionize
Be difficult to transmit free electron, once because friction makes electron exchange charge after if be difficult to disappear, make as film packing material
Used time can generate a large amount of electrostatic in its processing and application process and various drawbacks is caused even to endanger.For example, using thin
When film packs powdered commodity, usually because the electrostatic precipitation in heat sealing face leads to sealing strength sharp fall, commodity are being deposited
It will lead to packaging serious damage in storage, transportational process；Film, may be due to the electrostatic precipitation effect shadow of film when printing processing
Printing ink transfer is rung, " the electrostatic ink speck " etc. of inking unevenness occurs, causes printed patterns defect；High-speed packaging production line packaging process
In, electrostatic will cause influence to the cutting of film, conveying, folding etc.；It is various quick in particular with the rapid development of IT industry
Perceptual electronic component, instrument and meter etc. also largely use plastic film packaging, and film can generate electrostatic because of electromagnetic induction and friction
Accumulation, so that packaging commodity are destroyed because of the electrion that it is generated.Therefore, antistatic film is also by people's
Extensive concern, needs to develop a kind of antistatic property and good film-forming property and the flat membrane that is suitable for that film is not easy to occur rupturing stretches
Method prepares the polyethylene raw material of BOPE film.
Summary of the invention
The purpose of the invention is to overcome by existing polyethylene raw material using Flat film strength prepare polyethylene resist it is quiet
There are film formings when conductive film, and poor, film is easily broken, that is, is not suitable for the defect using Flat film strength preparation antistatic film,
And provide a kind of new polyethylene composition and the antistatic film made of the polyethylene composition.
Specifically, polyethylene composition provided by the invention contains conductive filler, component A, component B and component C；Described group
Dividing A is the linear low density polyethylene of ethylene/alpha-olefin copolymerization, and the melting in the case where temperature is 190 DEG C, load is 2.16kg refers to
Number MIAFor 0.01-3.5g/10min, density pAFor 0.880-0.936g/cm3；The component B is the line of ethylene/alpha-olefin copolymerization
Property low density polyethylene (LDPE), the melt index MI in the case where temperature is 190 DEG C, load is 2.16kgBIt is close for 3.6-9.9g/10min
Spend ρBFor 0.910-0.930g/cm3；The component C is the linear low density polyethylene of ethylene/alpha-olefin copolymerization, is in temperature
190 DEG C, load be 2.16kg under melt index MICFor 10-80g/10min, density pCFor 0.880-0.930g/cm3。
Antistatic film provided by the invention includes at least one layer of polyethylene layer formed by above-mentioned polyethylene composition.
The present inventor has found after further investigation, by the above-mentioned component A with particular melt index and density,
Polyethylene composition obtained from component B and component C and conductive filler are used cooperatively prepares polyethylene using Flat film strength
When film, have the advantages that stretching ratio is big, rate of film build is high, can satisfy Flat film strength and the higher of polyethylene raw material is wanted
It asks, adapts to the economy demand of existing Flat film strength production line, and obtained polyethylene film also has excellent resist
Antistatic property, great prospects for commercial application.
A preferred embodiment of the invention, the mass fraction of the component A described in the polyethylene composition
WAFor 25-90 parts by weight, the mass fraction W of the component BBFor 0.1-10 parts by weight, the mass fraction W of the component CCFor 10-
75 parts by weight, and by the total weight of the component A, component B and component C be 100 parts by weight in terms of, the content of the conductive filler is
When 0.1-10 parts by weight, enable to polyethylene composition that there is bigger stretching times in flat membrane method film biaxial tension processing
Rate and higher rate of extension.
According to another preferred method of implementation of the present invention, when the molecular weight distribution of the component A, component B and component C refer to
Number is all satisfied Mw/MnWhen≤8.0, the polyethylene composition is with preferable film forming and on the basis of antistatic property, by the poly- second
The film that ene compositions are prepared mechanical strength also with higher.
According to another preferred method of implementation of the present invention, when component A, component B and component C in the polyethylene composition
Density pA、ρBAnd ρCBetween relationship meet -0.04≤ρA-ρB≤ 0.02 and -0.04≤ρA-ρCWhen≤0.02, the polyethylene
With preferable film forming and on the basis of antistatic property, the film being prepared by the polyethylene composition also has composition
Higher tensile strength.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram for being used to prepare the multiple reactor shunting means of polyethylene composition.
Description of symbols
1- first reactor；2- second reactor；3- third reactor；4- solid-liquid (gas) separator；5- homogenization silo；
6- melt pelletization system.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Polyethylene composition provided by the invention contains conductive filler, component A, component B and component C；The component A is second
Alkene/alhpa olefin copolymerization linear low density polyethylene, the melt index MI in the case where temperature is 190 DEG C, load is 2.16kgAFor
0.01-3.5g/10min, density pAFor 0.880-0.936g/cm3；The component B is the linea low density of ethylene/alpha-olefin copolymerization
Polyethylene, the melt index MI in the case where temperature is 190 DEG C, load is 2.16kgBFor 3.6-9.9g/10min, density pBFor
0.910-0.930g/cm3；The component C be ethylene/alpha-olefin copolymerization linear low density polyethylene, temperature be 190 DEG C,
Load is the melt index MI under 2.16kgCFor 10-80g/10min, density pCFor 0.880-0.930g/cm3。
The polyethylene composition provided according to the present invention, it is preferable that the component A is temperature is 190 DEG C, load is
Melt index MI under 2.16kgAFor 0.01-3g/10min, the component B is in the case where temperature is 190 DEG C, load is 2.16kg
Melt index MIBFor 4-8g/10min, melt index MI of the component C in the case where temperature is 190 DEG C, load is 2.16kgCFor
10-60g/10min.It is highly preferred that melt index MI of the component A in the case where temperature is 190 DEG C, load is 2.16kgAFor
The melt index MI of 0.01-2g/10min, the component B in the case where temperature is 190 DEG C, load is 2.16kgBFor 4-5g/10min,
Melt index MI of the component C in the case where temperature is 190 DEG C, load is 2.16kgCFor 15-40g/10min.
The polyethylene composition provided according to the present invention, it is preferable that the density p of the component AAFor 0.910-0.930g/
cm3, the density p of the component BBFor 0.913-0.928g/cm3, the density p of the component CCFor 0.905-0.928g/cm3.More
Preferably, the density p of the component AAFor 0.915-0.926g/cm3, the density p of the component BBFor 0.913-0.924g/
cm3, the density p of the component CCFor 0.910-0.926g/cm3.It is particularly preferred that component A, group in the polyethylene composition
The density p of part B and component CA、ρBAnd ρCBetween relationship meet -0.04≤ρA-ρB≤ 0.02, and -0.04≤ρA-ρC≤ 0.02,
The polyethylene composition enabled in this way also has non-with preferable filming performance and on the basis of antistatic property
Often high tensile strength.
The component A, component B and component C are the linear low density polyethylene of ethylene/alpha-olefin copolymerization, wherein linear
Structure refers in strand only containing short-chain branch structure, and does not contain long branched chain structure and cross-linked structure, by polymerized monomer and
Polymerization process condition is determined, is specifically known to the skilled person, and therefore not to repeat here.
In the present invention, the melt index is measured according to method specified in GB/T3682-2000, wherein
Test condition includes that temperature is 190 DEG C, load 2.16kg.The density is according to method specified in GB/T1033.2-2010
And it is measured using density gradient column method.
The polyethylene composition provided according to the present invention, in order to enable the polyethylene composition arrived has better film forming
Energy and antistatic property, it is preferable that in the polyethylene composition, the mass fraction W of the component AAFor 25-90 weight
Part, the mass fraction W of the component BBFor 0.1-10 parts by weight, the mass fraction W of the component CCFor 10-75 parts by weight, and with
The total weight of the component A, component B and component C are 100 parts by weight meters, and the content of the conductive filler is 0.1-10 parts by weight.
It is highly preferred that in the polyethylene composition, the mass fraction W of the component AAFor 30-80 parts by weight, the component B's
Mass fraction WBFor 0.5-8 parts by weight, the mass fraction W of the component CCFor 20-70 parts by weight, and with the component A, component B
Total weight with component C is 100 parts by weight meters, and the content of the conductive filler is 0.5-3 parts by weight.Further, described group
Divide the mass fraction W of AAWith the mass fraction W of component CCWith the melt index MI of component AARelationship preferably satisfy 4.6 × lgMIA
+10.4≥WA/WC≥0.18×lgMIA+ 0.7, more preferably 1.8 × lgMI of satisfactionA+4.7≥WA/WC≥0.22×lgMIA+ 0.9,
Enable in this way the polyethylene composition in flat membrane method film biaxial tension processing with bigger stretching ratio and more
High rate of extension.
The polyethylene composition provided according to the present invention, particularly preferably, the polyethylene composition is 190 in temperature
DEG C, the melt index under load is 2.16kg be 0.1-20g/10min, most preferably 0.5-10g/10min.It is above-mentioned that will have
It is on the basis of particular melt index and the component A of density, component B and component C are used cooperatively, the polyethylene composition is whole
Melt index control in above-mentioned preferred range, the polyethylene composition that enables at the same have it is very excellent at
Film property, tensile strength and antistatic property.
The present invention is not particularly limited the content of the component B, using the total weight of the polyethylene composition as base
Standard, the mass percentage content M of the component BBIt is preferred that≤35 weight %, more preferably MB≤ 25 weight %.
The polyethylene composition provided according to the present invention, it is preferable that the molecular weight of the component A, component B and component C point
Cloth index is all satisfied Mw/Mn≤ 8.0, more preferably 3.5≤M of satisfactionw/Mn≤6.0.Specifically, in order to obtain with above-mentioned molecular weight
Component A, the component B and component C of distribution, the component A, component B and component C are all made of Ziegler-Natta catalyst and polymerize
It arrives.Wherein, the type of the Ziegler-Natta catalyst can be the conventional selection of this field, usually by magnesium titanium compound
With organo-aluminum compound and optional electron donor composition, specifically it is known to the skilled person, therefore not to repeat here.This
The inventor of invention has found there is above-mentioned melting for what is polymerize using Ziegler-Natta catalyst after further investigation
Index and the component A of density, component B and component C and conductive filler are used cooperatively, and obtained film is with good filming
Can also have very high tensile strength on the basis of antistatic property, be highly suitable for packaging material.
The present invention is not particularly limited the content of alhpa olefin comonomer in the component A, component B and component C, example
Such as, the molar content of alhpa olefin comonomer can be each independently 0.2- in the component A, component B and component C
15mol%, preferably 1.5-10mol%.In the present invention, the molar content of alhpa olefin comonomer refers to by alpha-olefin polymerization shape
At structural unit mole account for total monomer structural unit mole ratio.In addition, the component A, component B and component
Alhpa olefin in C is each independently C3-C20At least one of alkene.The angle ready availability from raw material, the component A,
Alhpa olefin in component B and component C is preferably propylene, 1- butylene, 2- butylene, 3-methyl-1-butene, 4- methyl-1-butylene, 1-
Amylene, 3- Methyl-1-pentene, 4-methyl-1-pentene, 3,3- dimethyl -1- amylene, 3,4- dimethyl -1- amylene, 4,4- diformazan
Base-1- amylene, 1- hexene, 4- methyl-1-hexene, 5- methyl-1-hexene, 1- heptene, 2- heptene, 1- octene, 1- decene, 1- ten
At least one of two (carbon) alkene, 1- 14 (carbon) alkene, 1- 16 (carbon) alkene, (carbon) alkene of 1- 18 and 1- 20 (carbon) alkene, more
Preferably at least one of 1- butylene, 1- hexene and 1- octene.
The polyethylene composition provided according to the present invention, the conductive filler can be the conventional selection of this field, for example,
Can in carbon black, graphite, carbon nanotube, carbon fiber, conductive metal particles, conductive metallic fiber and metal oxide at least
It is a kind of.Wherein, the carbon black includes that acetylene carbon black, superconduction carbon black, spy lead at least one of carbon black etc..The graphite includes day
At least one of right graphite, expansible graphite, expanded graphite, graphene etc..The carbon nanotube includes long time without surface modification
Or surface-modified single-walled carbon nanotube and/or multi-walled carbon nanotube.Wherein, the modified method in the surface is ability
Known in field technique personnel, therefore not to repeat here.Conductive metal in the conductive metal particles and conductive metallic fiber is respectively only
On the spot in silver, aluminium, copper, iron, nickel, stainless steel and lead plating, nickel plating, silver-plated glass marble, glass fibre, mica sheet etc. extremely
Few one kind.The metal oxide includes at least one of titanium oxide, zinc oxide, tin oxide, indium oxide, cadmium oxide etc..This
Outside, in terms of by the total weight of the component A, component B and component C for 100 parts by weight, the content of the conductive filler can be 0.1-
10 parts by weight, preferably 0.5-3 parts by weight.
The polyethylene composition provided according to the present invention, it is preferable that the polyethylene composition also contains lubricant, in this way
The extrusion processability energy of the polyethylene composition can be improved.The type and dosage of the lubricant all can be this field
Conventional selection, for example, the lubricant can be selected from polyethylene glycol (PEG) series lubricant agent, fluoropolymer series lubricant agent, organic
Silicon series lubricant agent, fatty alcohol type emollients, fatty acid lubricant, fatty acid ester type emollients, stearic amide series lubricant agent,
Fatty acid metal soaps lubricant, alkane and at least one of oxidation of alkanes series lubricant agent and micro-and nano-particles series lubricant agent.
Specifically, the PEG series lubricant agent for example can be the PEG molecule that molecular weight is 500-50000, can be by blocking, connecing
Branch, crosslinking Treatment, can also pass through other chemical modifications or physical modification.The fluoropolymer series lubricant agent for example can be
At least one of polytetrafluoroethylene (PTFE), Kynoar, polyhexafluoropropylene etc., or other are unimodal or multimodal fluorine-containing poly-
Close object and crystallization or hemicrystalline fluoropolymer.The organo-silicic oil can be existing various with carbon, silicon atom
For molecular backbone, using the oligomer of the organic groups such as methyl, phenyl, alkoxy, vinyl or oligomer as the compound of side chain.
The fatty alcohol type emollients can be for example at least one of soft fat alcohol, tallow alcohol, tallow fatty alcohol etc..The rouge
Fat acids lubricant for example can be with stearic acid and/or 12- hydroxy stearic acid.The fatty acid ester type emollients for example can be hard
At least one of resin acid butyl ester, stearic acid list glycerolipid, cetyl palmitate, tearyl base ester etc..It is described
Stearic amide series lubricant agent for example can be stearic amide, oleamide, erucyl amide, n, n- ethylene bis stearic acid amide
At least one of (EBS) etc..The fatty acid metal soaps lubricant for example can be lead stearate, calcium stearate, tristearin
At least one of sour magnesium, synthesis calcium acetate etc..The alkane and oxidation of alkanes series lubricant agent can be for example atoleine, consolidate
At least one of body paraffin, polyethylene wax, polypropylene wax, ethylene oxide wax etc..The micro-and nano-particles series lubricant agent is for example
It can be powdered rubber and/or aerosil particles.In addition, with the total weight of the component A, component B and component C for 100 parts by weight
Meter, the content of the lubricant can be 0.05-5 parts by weight, preferably 0.5-3 parts by weight.
In addition, can also contain in the polyethylene composition existing various in polyvinyl resin, polyethylene film
Other usually used auxiliary agents, and other described auxiliary agents will not stretching film forming to polyethylene composition provided by the invention,
Antistatic property and mechanical property have adverse effect on.Other described auxiliary agents include but is not limited to: antioxidant, resists slipping agent
At least one of electrostatic agent, antitack agent etc..In addition, the dosage of other auxiliary agents all can be this field conventional selection,
This those skilled in the art can be known, therefore not to repeat here.
The polyethylene composition can be prepared according to existing various methods, for example, first prepare respectively component A,
Component B and component C, then by the component A, component B, component C, conductive filler and selectively the lubricant that contains and other
Auxiliary agent carries out mechanical mixture in mechanical mixing equipment according to the proportion, is then added in melt blending equipment and carries out melt blending.
Wherein, the mechanical mixing equipment can be for example high-speed mixer, kneader etc..The melt blending equipment for example can be
Double screw extruder, single screw extrusion machine, open mill, mixer etc..
A preferred embodiment of the invention, the polyethylene composition multiple reactor as shown in Figure 1 simultaneously
Be prepared in coupling device, the multiple reactor shunting means include first reactor 1, second reactor 2, third reactor 3,
Solid-liquid (gas) separator 4, homogenization silo 5 and melt pelletization system 6, wherein the first reactor 1,2 and of second reactor
Third reactor 3 is connected in parallel, and the number of solid-liquid (gas) separator 4 is three, anti-with first reactor 1, second respectively
Answer device 2 to be connected to third reactor 3, the component A that is prepared by first reactor 1, the component B prepared by second reactor 2 and
The component C prepared by third reactor 3 is mutually separated in solid-liquid (gas) separator 4 different respectively, then will be through phase
Component A, component B and component C after separation are delivered in homogenization silo 5 in proportion and with conductive filler and selectively contain
Lubricant and other additives are mixed together uniformly, are sent into melt pelletization system 6 carry out extruding pelletization later.Wherein, each anti-
It answers the polymerization in device to can be batchwise polymerization, is also possible to continuous polymerization.When using multiple reactor parallel polymerization, hereinafter
WA、WBAnd WCFor yield in unit time of each component in respective reaction device.
Antistatic film provided by the invention includes at least one layer of polyethylene layer formed by above-mentioned polyethylene composition.
The antistatic film can have single layer structure, it is possible to have multilayered structure.When the antistatic film is
When multilayered structure, at least surface layer is the polyethylene layer formed by the polyethylene composition.For example, the antistatic film can be with
Composite construction with upper epidermis, sandwich layer and layer, and at least described upper epidermis or layer are by the polyethylene composition
The polyethylene layer that object is formed.Usually, the thickness of the antistatic film can be 10-200 μm, preferably 10-100 μm.
In addition, when the antistatic film has the composite construction of upper epidermis, sandwich layer and layer, the upper epidermis and layer
Thickness is each independently the 1-25% of the antistatic film thickness.
In addition, antistatic film can be monodirectional tension film, or biaxially oriented film, preferably bidirectional stretching
Film, the biaxially oriented film being more preferably prepared by flat membrane biaxial tension method.
It is known to the skilled person using the process that flat membrane biaxial tension method prepares biaxially oriented film.Specifically,
First above-mentioned polyethylene composition is added in casting apparatus and squeeze out curtain coating slab, it is then that obtained slab is double in film
Drawing and forming is carried out into stretcher.During squeezing out curtain coating, slab die head can according to need the knot of the film of acquisition
Structure is selected, for example, can use single layer die when needing to obtain the film with single layer structure；When needs are had
It, can be multiple using multilayered structure when having film (film with upper epidermis, sandwich layer and layer three-decker) of multilayered structure
Mold head, and in the compound die head of the multilayered structure at least one layer of (upper epidermis or layer) with above-mentioned polyethylene composition is housed
The extruder hopper of object is connected to, and at least one layer (upper epidermis or layer) in the film enabled in this way is by above-mentioned poly-
The polyethylene layer that vinyl composition is formed.In extrusion process, extrusion temperature can be 160-260 DEG C, be cast the temperature of chilling roller
Degree can be 15-85 DEG C.In addition, the biaxial tension (can carry out film longitudinal direction using Synchronos method drawing process simultaneously
(MD) and laterally (TD) is stretched), using method of fractional steps drawing process (film longitudinal stretching can also be first carried out, then carries out film
Cross directional stretch).What the Synchronos method stretched specifically comprises the processes of: the slab carries out vertical and horizontal after being fully warmed-up
Direction stretches, wherein preheating temperature can be 75-165 DEG C, and draft temperature can be 75-160 DEG C, longitudinal (MD) stretching ratio
>=4 times, lateral stretching ratio >=5 times (TD), cross directional stretch rate >=50%/s.What the method for fractional steps stretched specifically comprises the processes of:
The slab first carries out longitudinal stretching after being fully warmed-up, and carries out cross directional stretch later, wherein preheating temperature can be 65-
158 DEG C, draft temperature can be 65-155 DEG C, longitudinal stretching ratio >=4 times (MD), laterally stretching ratio >=5 times (TD), laterally
Rate of extension >=50%/s.In addition, can be handled without setting after film drawing and forming, can also carry out at annealing setting
Reason.When carrying out annealing setting processing, film setting treatment temperature can be 80-165 DEG C.Finally, film can also carry out table
Face sided corona treatment, cutting edge and winding processing, finally obtain antistatic film of the present invention.
Antistatic film provided by the invention has preferable antistatic property and film forming and stretching ratio is big, stretches
Rate is high.During preparing the biaxially oriented film using Flat film strength, as described above, the antistatic film
Longitudinal stretching ratio >=4 times (MD), lateral stretching ratio >=5 times (TD).Stretching ratio is bigger, then the mechanics of antistatic film is strong
It spends higher.Transverse direction (TD) rate of extension >=50%/s of the antistatic film, preferably 60-150%/s can guarantee in this way
Industrialize continuous production.
Antistatic film mechanical strength with higher provided by the invention and preferable optical property and more excellent
Antistatic property.The biaxially oriented film performance can meet: longitudinal (MD) tensile strength >=40MPa, preferably >=50MPa；
Laterally (TD) tensile strength >=40MPa, preferably >=50MPa.The tension fracture elongation rate of the biaxially oriented film≤
350%, preferably≤300%.In addition, the surface resistivity of the antistatic film is 103-1010Ω, preferably 103-107
Ω.In the present invention, the longitudinal tensile strength, transverse tensile strength and tension fracture elongation rate are according to GB/T1040.3-
Method specified in 2006 is measured.The surface resistivity is surveyed according to method specified in GB/T 1410-2006
It is fixed.
The production cost of antistatic film provided by the invention is low, processing technology is simple, versatility is good, has widened polyethylene
The application field of film.
The present invention will be described in detail by way of examples below.
In the following Examples and Comparative Examples:
Film biaxial tension equipment is purchased from Germany Br ü ckner company, model Karo IV.
The polyethylene composition and film performance are tested in accordance with the following methods:
(1) molecular weight distributing index (Mw/Mn): using the PL-GPC 220 of Polymer Laboratories company, Britain
Type gel permeation chromatograph combination IR5 type infrared detector is measured, and chromatographic column is 3 series connection Plgel, 10 μm of MIXED-B
Column, solvent and mobile phase are 1,2,4- trichloro-benzenes, and column temperature is 150 DEG C, flow velocity 1.0mL/min, using the EasiCal of PL company
PS-1 Narrow distribution polystyrene standard specimen carries out universal calibration；
(2) it melt index (MI): is measured according to method specified in GB/T 3682-2000, wherein test temperature
It is 190 DEG C, load 2.16kg；
(3) it density: is measured according to method specified in GB/T 1033.2-2010 and using density gradient column method.
Embodiment 1
The present embodiment is for illustrating polyethylene composition provided by the invention and antistatic film.
Contain component A, component B, component C, conductive filler and lubricant in polyethylene composition provided in this embodiment.Group
Dividing A, component B and component C is the linear low density polyethylene (LLDPE) of ethylene/alpha-olefin copolymerization, and is all made of identical urge
Agent system (Ziegler-Natta catalyst, the Ziegler-Natta catalyst body being prepared by CN101838351A embodiment 1
System, similarly hereinafter) be prepared.Component A, component B, component C, the performance of conductive filler and lubricant are as follows:
The melt index MI of component AA=2.0g/10min, density pA=0.913g/cm3, molecular weight distributing index Mw/Mn=
6.4, molar content=8.9mol% of alhpa olefin comonomer；
The melt index MI of component BB=4.0g/10min, density pB=0.913g/cm3, molecular weight distributing index Mw/Mn=
5.7, molar content=8.9mol% of alhpa olefin comonomer；
The melt index MI of component CC=15g/10min, density pC=0.905g/cm3, molecular weight distributing index Mw/Mn=
4.6, molar content=10.1mol% of alhpa olefin comonomer；
Conductive filler is multi-walled carbon nanotube (MWNTs), is produced by Cheaptubes company, the U.S., diameter 20-30nm,
Length is 20-30 μm；
Lubricant is the PEG lubricant produced by Switzerland's Clariant Corporation, molecular weight 10000.
(1) preparation of polyethylene composition:
Above-mentioned each component is weighed and mixed according to the ratio, wherein the mass fraction W of component AAFor 80 parts by weight, component
The mass fraction W of BBFor 10 parts by weight, the mass fraction W of component CCFor 20 parts by weight, WA/WC=4 (meet 4.6 × lgMIA+
10.4≥WA/WC≥0.18×lgMIA+ 0.7, also meet 1.8 × lgMIA+4.7≥WA/WC≥0.22×lgMIA+ 0.9), with group
The gross mass for dividing A, component B and component C is 100 parts by weight meters, and the additional amount of conductive filler is 3 parts by weight, the addition of lubricant
Amount is 0.1 parts by weight.It adds mixture in high speed agitator and is uniformly mixed later, then the material mixed is added to W&
In the feeder of the double screw extruder of P company manufacture, material enters in twin-screw via feeder, screw rod in process
Temperature is maintained between 160-210 DEG C, through screw rod melting mixing uniformly, squeeze out, be granulated and dry, obtain polyethylene composition grain
Material, is detected its melt index MI=3.4g/10min.
(2) preparation of antistatic film:
Polyethylene composition pellet made from above-mentioned steps (1) is dried, is added to Labtech company, Sweden later
Model LCR400 multilayer extrusion casting machine sandwich layer extruder and upper and lower surface layer extruder in carry out melting extrusion simultaneously
It is cast slab, wherein it also needs to be added inorganic antitack agent (silica, similarly hereinafter) in the upper and lower surface layer extruder, and upper,
The weight ratio of the antitack agent and polyethylene composition pellet that are added in layer extruder is 0.02:1, in curtain coating slab process
In, curtain coating chilling roll temperature is set as 25 DEG C, polyethylene thickness slab is made, is made of upper epidermis, sandwich layer and layer.
Above-mentioned polyethylene thickness slab is put into the stretching clamp of film biaxial tension equipment, is drawn using first longitudinal direction (MD)
The two-way step drawing technological forming that laterally (TD) is stretched after stretching, each step process condition are as follows: MD preheating temperature is 100 DEG C, MD
Draft temperature is 110 DEG C, and MD stretching ratio is 4 times；TD preheating temperature is 100 DEG C, and TD draft temperature is 115 DEG C, and TD is stretched again
Rate is 5 times, and film TD rate of extension is 60%/s；Film setting temperature is 120 DEG C, obtains the film that average thickness is 25 μm,
It is made of upper epidermis, sandwich layer and layer, and each layer raw material is the polyethylene composition of the present embodiment, and upper epidermis and following table
Also contain antitack agent in layer, the thickness of upper epidermis and layer is 0.5 μm.
Embodiment 2
The present embodiment is for illustrating polyethylene composition provided by the invention and antistatic film.
Contain component A, component B, component C, conductive filler and lubricant in polyethylene composition provided in this embodiment.Group
Dividing A, component B and component C is the linear low density polyethylene (LLDPE) of ethylene/alpha-olefin copolymerization, and is all made of identical urge
Agent system (Ziegler-Natta catalyst) is prepared.The performance of component A, component B, component C, conductive filler and lubricant
It is as follows:
The melt index MI of component AA=0.01g/10min, density pA=0.930g/cm3, molecular weight distributing index Mw/Mn
=5.5, molar content=2.1mol% of alhpa olefin comonomer；
The melt index MI of component BB=9.0g/10min, density pB=0.930g/cm3, molecular weight distributing index Mw/Mn=
4.8, molar content=2.8mol% of alhpa olefin comonomer；
The melt index MI of component CC=40g/10min, density pC=0.922g/cm3, molecular weight distributing index Mw/Mn=
4.4, molar content=4.0mol% of alhpa olefin comonomer；
Conductive filler is graphene, is purchased from Xiamen Knano Graphene Technology Corporation Limited；
Lubricant is the PEG lubricant produced by Switzerland's Clariant Corporation, molecular weight 10000.
(1) preparation of polyethylene composition:
Above-mentioned each component is weighed and mixed according to the ratio, wherein the mass fraction W of component AAFor 55 parts by weight, component
The mass fraction W of BBFor 5 parts by weight, the mass fraction W of component CCFor 55 parts by weight, WA/WC=1 (meets 4.6 × lgMIA+10.4
≥WA/WC≥0.18×lgMIA+ 0.7, also meet 1.8 × lgMIA+4.7≥WA/WC≥0.22×lgMIA+ 0.9), with component A,
The gross mass of component B and component C are 100 parts by weight meters, and the additional amount of conductive filler is 3 parts by weight, and the additional amount of lubricant is
0.1 parts by weight.It adds mixture in high speed agitator and is uniformly mixed later, then the material mixed is added to W&P public affairs
It takes charge of in the feeder of the double screw extruder of manufacture, material enters in twin-screw via feeder, the temperature of screw rod in process
Degree be maintained between 180-240 DEG C, through screw rod melting mixing uniformly, squeeze out, be granulated and dry, obtain polyethylene composition grain
Material, is detected its melt index MI=0.7g/10min.
(2) preparation of antistatic film:
Polyethylene composition pellet made from above-mentioned steps (1) is dried, is added to Labtech company, Sweden later
Model LCR400 multilayer extrusion casting machine sandwich layer extruder and upper and lower surface layer extruder in carry out melting extrusion simultaneously
It is cast slab, wherein also need that inorganic antitack agent is added in the upper and lower surface layer extruder, and add in the extruder of upper and lower surface layer
The weight ratio of the antitack agent and polyethylene composition pellet that enter is 0.02:1, during being cast slab, will be cast chilling roller
Temperature is set as 85 DEG C, and polyethylene thickness slab is made, is made of upper epidermis, sandwich layer and layer.
Above-mentioned polyethylene thickness slab is put into the stretching clamp of film biaxial tension equipment, is drawn using first longitudinal direction (MD)
The two-way step drawing technological forming that laterally (TD) is stretched after stretching, each step process condition are as follows: MD preheating temperature is 130 DEG C, MD
Draft temperature is 126 DEG C, and MD stretching ratio is 4 times；TD preheating temperature is 130 DEG C, and TD draft temperature is 128 DEG C, and TD is stretched again
Rate is 6 times, and film TD rate of extension is 100%/s；Film setting temperature is 130 DEG C, obtains the film that average thickness is 25 μm,
It is made of upper epidermis, sandwich layer and layer, and each layer raw material is the polyethylene composition of the present embodiment, and upper epidermis and following table
Also contain antitack agent in layer, the thickness of upper epidermis and layer is 1 μm.
Embodiment 3
The present embodiment is for illustrating polyethylene composition provided by the invention and antistatic film.
Contain component A, component B, component C, conductive filler and lubricant in polyethylene composition provided in this embodiment.Group
Dividing A, component B and component C is the linear low density polyethylene (LLDPE) of ethylene/alpha-olefin copolymerization, these three components are all made of
Identical catalyst system (Ziegler-Natta catalyst) is prepared.Component A, component B, component C, conductive filler and lubrication
The performance of agent is as follows:
The melt index MI of component AA=0.1g/10min, density pA=0.920g/cm3, molecular weight distributing index Mw/Mn=
5.8, molar content=2.5mol% of alhpa olefin comonomer；
The melt index MI of component BB=6.0g/10min, density pB=0.920g/cm3, molecular weight distributing index Mw/Mn=
4.5, molar content=5.3mol% of alhpa olefin comonomer；
The melt index MI of component CC=25g/10min, density pC=0.920g/cm3, molecular weight distributing index Mw/Mn=
4.2, molar content=5.7mol% of alhpa olefin comonomer；
Conductive filler is titanium oxide, is purchased from nine Chemical Co., Ltd., nation of Shanghai；
Lubricant is the PEG lubricant produced by Switzerland's Clariant Corporation, molecular weight 10000.
(1) preparation of polyethylene composition:
Above-mentioned each component is weighed and mixed according to the ratio, wherein the mass fraction W of component AAFor 75 parts by weight, component
The mass fraction W of BBFor 2 parts by weight, the mass fraction W of component CCFor 35 parts by weight, WA/WC=2.1 (meet 4.6 × lgMIA+
10.4≥WA/WC≥0.18×lgMIA+ 0.7, also meet 1.8 × lgMIA+4.7≥WA/WC≥0.22×lgMIA+ 0.9), with group
The gross mass for dividing A, component B and component C is 100 parts by weight meters, and the additional amount of conductive filler is 3 parts by weight, the addition of lubricant
Amount is 0.1 parts by weight.It adds mixture in high speed agitator and is uniformly mixed later, then the material mixed is added to W&
In the feeder of the double screw extruder of P company manufacture, material enters in twin-screw via feeder, screw rod in process
Temperature is maintained between 160-210 DEG C, through screw rod melting mixing uniformly, squeeze out, be granulated and dry, obtain polyethylene composition grain
Material, is detected its melt index MI=0.6g/10min.
(2) preparation of antistatic film:
Polyethylene composition pellet made from above-mentioned steps (1) is dried, is added to Labtech company, Sweden later
Model LCR400 multilayer extrusion casting machine in carry out melting extrusion and be cast slab and will be flowed during being cast slab
Prolong chilling roll temperature and be set as 35 DEG C, polyethylene thickness slab is made, which is single layer structure.
Above-mentioned polyethylene thickness slab is put into the stretching clamp of film biaxial tension equipment, is drawn using first longitudinal direction (MD)
The two-way step drawing technological forming that laterally (TD) is stretched after stretching, each step process condition are as follows: MD preheating temperature is 116 DEG C, MD
Draft temperature is 118 DEG C, and MD stretching ratio is 4 times；TD preheating temperature is 120 DEG C, and TD draft temperature is 120 DEG C, and TD is stretched again
Rate is 5 times, and film TD rate of extension is 100%/s；Film setting temperature is 122 DEG C, obtains the single layer that average thickness is 25 μm
Film.
Embodiment 4
The present embodiment is for illustrating polyethylene composition provided by the invention and antistatic film.
Polyethylene composition and antistatic film are prepared according to the method for embodiment 1, unlike, by conductive filler multi wall
Carbon nanotube acetylene carbon black (purchased from Tianjin benefit China into Chemical Co., Ltd., No. CAS is 1333-86-4) substitution, and with component
A, the gross mass of component B and component C are 100 parts by weight meters, and the additional amount of conductive filler is 5 parts by weight, and obtaining average thickness is
25 μm of film is made of upper epidermis, sandwich layer and layer, and each layer raw material is the polyethylene composition of the present embodiment, and
Also contain antitack agent in upper epidermis and layer, the thickness of upper epidermis and layer is 1 μm.
Embodiment 5
The present embodiment is for illustrating polyethylene composition provided by the invention and antistatic film.
Polyethylene composition and antistatic film are prepared according to the method for embodiment 1, unlike, the system of antistatic film
Drawing process during standby is synchronous bidirectional stretching, and preheating temperature is 100 DEG C, and draft temperature is 110 DEG C, the stretching of MD and TD
Multiplying power is 4 times, rate of extension 60%/s, obtains the film that average thickness is 25 μm, wherein the thickness of upper epidermis and layer
Degree is 0.5 μm.
Embodiment 6
The present embodiment is for illustrating polyethylene composition provided by the invention and antistatic film.
Polyethylene composition and antistatic film are prepared according to the method for embodiment 1, unlike, the component A has
Following property: melt index MIA=2.0g/10min, density pA=0.928g/cm3, molecular weight distributing index Mw/Mn=5.1, α
Molar content=2.2mol% of olefin comonomer.That is, the density p of component A, component B and component CA、ρBAnd ρCBetween pass
System is unsatisfactory for -0.04≤ρA-ρB≤ 0.02 and -0.04≤ρA-ρC≤ 0.02, obtain the film that average thickness is 25 μm, wherein
Upper epidermis and the thickness of layer are 0.5 μm.
Comparative example 1
This comparative example is used to illustrate the polyethylene raw material and antistatic film of reference.
Polyethylene raw material:
Polyethylene raw material used in this comparative example is the film-grade linea low density of Sinopec Yanshan Petrochemical company production
Polyethylene, the trade mark 7042, catalyst used in preparation process are Ziegler-Natta catalyst, melt index MI=2.0g/
10min, density p=0.920g/cm3, molecular weight distributing index Mw/Mn=4.5.
The preparation of polyethylene composition and antistatic film:
Polyethylene composition and antistatic film are prepared according to the method for embodiment 1, unlike, by the polyethylene group
The above-mentioned polyethylene raw material substitution that component A, component B and component C in object use this comparative example of identical weight part is closed, through multiple
It attempts the case where stretching rupture of membranes occur, film forming can not be stretched.In addition, by the TD rate of extension in antistatic film preparation process
After being down to 50%/s, is repeatedly attempted the case where stretching rupture of membranes still occur, film forming can not be stretched.
Comparative example 2
This comparative example is used to illustrate the polyethylene raw material and film of reference.
Polyethylene composition and film are prepared according to the method for embodiment 1, unlike, in polyethylene composition and film
Preparation process in be added without conductive filler multi-walled carbon nanotube, obtaining average thickness is 25 μm of film, wherein upper epidermis and
The thickness of layer is 0.5 μm.
Comparative example 3
This comparative example is used to illustrate the polyethylene composition and antistatic film of reference.
The polyethylene composition that this comparative example provides is made of component 1, component 2, conductive filler and lubricant, wherein group
Point 1 and component 2 be the linear low density polyethylene (LLDPE) of ethylene/alpha-olefin copolymerization, and be all made of ziegler-natta catalyzed
Agent is prepared.Component 1, component 2, the performance of conductive filler and lubricant are as follows:
The melt index MI of component 11=2.0g/10min, density p1=0.913g/cm3, molecular weight distributing index Mw/Mn=
6.4, molar content=8.9mol% of alhpa olefin comonomer；
The melt index MI of component 22=4.0g/10min, density p2=0.913g/cm3, molecular weight distributing index Mw/Mn=
5.7, molar content=8.9mol% of alhpa olefin comonomer；
Conductive filler is multi-walled carbon nanotube (MWNTs), is produced by Cheaptubes company, the U.S., diameter 20-30nm,
Length is 20-30 μm；
Lubricant is the PEG lubricant produced by Switzerland's Clariant Corporation, molecular weight 10000.
(1) preparation of polyethylene composition:
Polyethylene composition is prepared according to the method for embodiment 1, unlike, the dosage of each component is different, specifically, group
The dosage for dividing 1 is 80 parts by weight, and the dosage of component 2 is 30 parts by weight, with the gross mass of component 1 and component 2 for 100 parts by weight
Meter, the additional amount of conductive filler are 3 parts by weight, and the additional amount of lubricant is 0.1 parts by weight, obtains polyethylene composition pellet.
(2) preparation of antistatic film:
The preparation of polyethylene antistatic film is carried out according to the method for embodiment 1, the results showed that, it is double by repeatedly attempting
It is only 2 times (TD) × 2 times (MD) to the maximum tension multiplying power of oriented film, film TD highest stretching ratio is only 10%/s, that is,
Stretching ratio and rate of extension are too low, and stretching film forming is poor, do not have practicability.
Comparative example 4
This comparative example is used to illustrate the polyethylene composition and antistatic film of reference.
The polyethylene composition that this comparative example provides is made of component 1, component 2, conductive filler and lubricant, wherein group
Point 1 and component 2 be the linear low density polyethylene (LLDPE) of ethylene/alpha-olefin copolymerization, and be all made of ziegler-natta catalyzed
Agent is prepared.Component 1, component 2, the performance of conductive filler and lubricant are as follows:
The melt index MI of component 11=2.0g/10min, density p1=0.913g/cm3, molecular weight distributing index Mw/Mn=
6.4, molar content=8.9mol% of alhpa olefin comonomer；
The melt index MI of component 22=15g/10min, density p2=0.905g/cm3, molecular weight distributing index Mw/Mn=
4.6, molar content=10.1mol% of alhpa olefin comonomer；
Conductive filler is multi-walled carbon nanotube (MWNTs), is produced by Cheaptubes company, the U.S., diameter 20-30nm,
Length is 20-30 μm；
Lubricant is the PEG lubricant produced by Switzerland's Clariant Corporation, molecular weight 10000.
(1) preparation of polyethylene composition:
Polyethylene composition is prepared according to the method for embodiment 1, unlike, the dosage of each component is different, specifically, group
The dosage for dividing 1 is 80 parts by weight, and the dosage of component 2 is 30 parts by weight, with the gross mass of component 1 and component 2 for 100 parts by weight
Meter, the additional amount of conductive filler are 3 parts by weight, and the additional amount of lubricant is 0.1 parts by weight, obtains polyethylene composition pellet.
(2) preparation of antistatic film:
The preparation of polyethylene antistatic film is carried out according to the method for embodiment 1, the results showed that, it is double by repeatedly attempting
It is only 2 times (TD) × 2 times (MD) to the maximum tension multiplying power of oriented film, film TD highest stretching ratio is only 10%/s, that is,
Stretching ratio and rate of extension are too low, and stretching film forming is poor, do not have practicability.
Test case
Test case is used to illustrate the test of polyethylene film and reference polyethylene film performance.
(1) it film tensile strength and tension fracture elongation rate: is carried out according to method specified in GB/T 1040.3-2006
Measurement, acquired results are as shown in table 1；
(2) surface resistivity: being measured according to method specified in GB/T 1410-2006, acquired results such as 1 institute of table
Show.
Table 1
It can be concluded that, there is preferable filming performance using polyethylene composition provided by the invention from result above, and
And obtained film has preferable antistatic property, great prospects for commercial application.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (33)
1. a kind of polyethylene composition, which is characterized in that the polyethylene composition contain conductive filler, component A, component B and
Component C；The component A is the linear low density polyethylene of ethylene/alpha-olefin copolymerization, temperature is 190 DEG C, load is
Melt index MI under 2.16kgAFor 0.01-3.5g/10min, density pAFor 0.880-0.936g/cm3；The component B is second
Alkene/alhpa olefin copolymerization linear low density polyethylene, the melt index MI in the case where temperature is 190 DEG C, load is 2.16kgBFor
3.6-9.9g/10min, density pBFor 0.913-0.928g/cm3；The component C is the linea low density of ethylene/alpha-olefin copolymerization
Polyethylene, the melt index MI in the case where temperature is 190 DEG C, load is 2.16kgCFor 10-80g/10min, density pCFor
0.905-0.928g/cm3；
Wherein, the molecular weight distributing index of the component A, component B and component C are all satisfied Mw/Mn≤8.0。
2. polyethylene composition according to claim 1, wherein the component A is temperature is 190 DEG C, load is
Melt index MI under 2.16kgAFor 0.01-3g/10min, the component B is in the case where temperature is 190 DEG C, load is 2.16kg
Melt index MIBFor 4-8g/10min, melt index MI of the component C in the case where temperature is 190 DEG C, load is 2.16kgCFor
10-60g/10min。
3. polyethylene composition according to claim 1, wherein the component A is temperature is 190 DEG C, load is
Melt index MI under 2.16kgAFor 0.01-2g/10min, the component B is in the case where temperature is 190 DEG C, load is 2.16kg
Melt index MIBFor 4-5g/10min, melt index MI of the component C in the case where temperature is 190 DEG C, load is 2.16kgCFor
15-40g/10min。
4. polyethylene composition according to claim 1, wherein the density p of the component AAFor 0.910-0.930g/
cm3。
5. polyethylene composition according to claim 4, wherein the density p of the component AAFor 0.915-0.926g/
cm3, the density p of the component BBFor 0.913-0.924g/cm3, the density p of the component CCFor 0.910-0.926g/cm3。
6. polyethylene composition according to claim 4, wherein component A, component B and group in the polyethylene composition
The density p of part CA、ρBAnd ρCBetween relationship meet -0.04≤ρA-ρB≤ 0.02, and -0.04≤ρA-ρC≤0.02。
7. polyethylene composition described in any one of -6 according to claim 1, wherein in the polyethylene composition,
The mass fraction W of the component AAFor 25-90 parts by weight, the mass fraction W of the component BBFor 0.1-10 parts by weight, described group
Divide the mass fraction W of CCFor 10-75 parts by weight, and in terms of being 100 parts by weight by the total weight of the component A, component B and component C,
The content of the conductive filler is 0.1-10 parts by weight.
8. polyethylene composition according to claim 7, wherein in the polyethylene composition, the matter of the component A
Measure number WAFor 30-80 parts by weight, the mass fraction W of the component BBFor 0.5-8 parts by weight, the mass fraction W of the component CC
For 20-70 parts by weight, and in terms of being 100 parts by weight by the total weight of the component A, component B and component C, the conductive filler
Content is 0.5-3 parts by weight.
9. polyethylene composition according to claim 7, wherein the mass fraction W of the component AAWith the quality of component C
Number WCWith the melt index MI of component AARelationship meet 4.6 × lgMIA+10.4≥WA/WC≥0.18×lgMIA+0.7。
10. polyethylene composition according to claim 9, wherein the mass fraction W of the component AAWith the quality of component C
Number WCWith the melt index MI of component AARelationship meet 1.8 × lgMIA+4.7≥WA/WC≥0.22×lgMIA+0.9。
11. polyethylene composition according to claim 9, wherein on the basis of the total weight of the polyethylene composition,
The mass percentage content M of the component BB≤ 35 weight %.
12. polyethylene composition according to claim 11, wherein using the total weight of the polyethylene composition as base
Standard, the mass percentage content M of the component BB≤ 25 weight %.
13. polyethylene composition described in any one of -6,9 and 11 according to claim 1, wherein the polyethylene composition
Melt index of the object in the case where temperature is 190 DEG C, load is 2.16kg is 0.1-20g/10min.
14. polyethylene composition according to claim 13, wherein the polyethylene composition is 190 DEG C, carries in temperature
Melt index under lotus is 2.16kg is 0.5-10g/10min.
15. polyethylene composition described in any one of -6 according to claim 1, wherein the component A, component B and component
The molecular weight distributing index of C is all satisfied 3.5≤Mw/Mn≤6.0。
16. polyethylene composition according to claim 15, wherein the component A, component B and component C are all made of neat lattice
Le-Natta catalyst polymerization obtains.
17. polyethylene composition described in any one of -6 according to claim 1, wherein the component A, component B and component
The molar content of alhpa olefin comonomer is each independently 0.2-15mol% in C.
18. polyethylene composition according to claim 17, wherein alhpa olefin is total in the component A, component B and component C
The molar content of polycondensation monomer is each independently 1.5-10mol%.
19. polyethylene composition according to claim 17, wherein the alhpa olefin in the component A, component B and component C
It is each independently C3-C20At least one of alkene.
20. polyethylene composition according to claim 19, wherein the alhpa olefin in the component A, component B and component C
It is each independently propylene, 1- butylene, 3-methyl-1-butene, 1- amylene, 3- Methyl-1-pentene, 4-methyl-1-pentene, 3,3-
Dimethyl-1- amylene, 3,4- dimethyl-1- amylene, 4,4- dimethyl-1- amylene, 1- hexene, 4- methyl-1-hexene, 5- first
Base -1- hexene, 1- heptene, 1- octene, 1- decene, 1- dodecylene, tetradecene, cetene, 1- octadecene and
At least one of 1- eicosylene.
21. polyethylene composition according to claim 20, wherein the alhpa olefin in the component A, component B and component C
It is each independently at least one of 1- butylene, 1- hexene and 1- octene.
22. polyethylene composition described in any one of -6 according to claim 1, wherein the conductive filler is carbon black, stone
At least one of ink, carbon nanotube, carbon fiber, conductive metal particles, conductive metallic fiber and metal oxide.
23. polyethylene composition described in any one of -6 according to claim 1, wherein the polyethylene composition also contains
There is lubricant.
24. polyethylene composition according to claim 23, wherein with the total weight of the component A, component B and component C
For 100 parts by weight meters, the content of the lubricant is 0.05-5 parts by weight.
25. polyethylene composition according to claim 24, wherein the lubricant be selected from polyethylene glycol series lubricant agent,
Fluoropolymer series lubricant agent, organic silicon lubricant, fatty alcohol type emollients, fatty acid lubricant, fatty acid ester profit
Lubrication prescription, stearic amide series lubricant agent, fatty acid metal soaps lubricant, alkane and oxidation of alkanes series lubricant agent and the micro-nano grain of rice
At least one of subclass lubricant.
26. a kind of antistatic film, the antistatic film includes at least one layer as described in any one of claim 1-25
Polyethylene composition formed polyethylene layer.
27. antistatic film according to claim 26, wherein the antistatic film have upper epidermis, sandwich layer and under
The composite construction on surface layer, and at least described upper epidermis or layer are the polyethylene layer formed by the polyethylene composition.
28. antistatic film according to claim 27, wherein when the antistatic film have upper epidermis, sandwich layer and
When the composite construction of layer, the thickness of the upper epidermis and layer is each independently the 1- of the antistatic film thickness
25%.
29. antistatic film according to claim 26, wherein the antistatic film is by flat membrane biaxial tension legal system
Standby obtained biaxially oriented film.
30. antistatic film according to claim 29, wherein preparing the two-way drawing using flat membrane biaxial tension method
During stretching film, longitudinal stretching multiplying power >=4 times, cross directional stretch multiplying power >=5 times；Institute is being prepared using flat membrane biaxial tension method
During stating biaxially oriented film, cross directional stretch rate >=50%/s.
31. the antistatic film according to any one of claim 26-30, wherein the thickness of the antistatic film
It is 10-200 μm.
32. antistatic film according to claim 31, wherein the antistatic film with a thickness of 10-100 μm.
33. antistatic film according to claim 29, wherein the longitudinal tensile strength of the biaxially oriented film >=
40MPa, transverse tensile strength >=40MPa；Tension fracture elongation rate≤350% of the biaxially oriented film；The two-way drawing
The surface resistivity for stretching film is 103-1010Ω。
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| CN102604194A (en) * | 2012-02-11 | 2012-07-25 | 常州市嘉鹏塑料制品有限公司 | Transparent electromagnetic shielding film |
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| CN102604194A (en) * | 2012-02-11 | 2012-07-25 | 常州市嘉鹏塑料制品有限公司 | Transparent electromagnetic shielding film |
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