CN109306098A - A kind of polyethylene composition and preparation method and applications and plate - Google Patents
A kind of polyethylene composition and preparation method and applications and plate Download PDFInfo
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- CN109306098A CN109306098A CN201710619442.8A CN201710619442A CN109306098A CN 109306098 A CN109306098 A CN 109306098A CN 201710619442 A CN201710619442 A CN 201710619442A CN 109306098 A CN109306098 A CN 109306098A
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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
- C08L23/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
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Abstract
The present invention relates to polyethylene fields, disclose a kind of polyethylene composition and preparation method and applications and plate, wherein, contain the first polyethylene, the second polyethylene and inorganic filler in the polyethylene composition, wherein, the viscosity-average molecular weight of first polyethylene is greater than 300,000 and is 5,000,000 hereinafter, the weight average molecular weight of second polyethylene is 40,000-30 ten thousand.Tensile break stress, tension failure strain and the simply supported beam notch impact strength of polyethylene composition provided by the invention improve a lot, and have the advantages that high-impact, high intensity and excellent in mechanical performance.
Description
Technical field
The present invention relates to polyethylene fields, and in particular, to a kind of polyethylene composition and preparation method and applications and
Plate.
Background technique
High-strength composite material backing plate is also " paving slab ", is that a kind of high-strength panel being made using composite material is produced
Product, it is possible to provide a good ground road conditions solution, process of deployment operate convenient, reliable performance, and it is special to be particularly suitable for
Complicated geographical environment.Such as sandy beach, marshland, tundra, slob, inland grassland, permafrost area, can meet
The passage of heavy equipment and firm, and for land protection etc..
High-strength composite material backing plate application field specifically includes that (1) petroleum, natural gas, colliery engineering: land operation horizontal
Platform, construction site Fast Construction；The quick laying of passing road and road surface are repaired；Ocean platform application；Coal mine protective pad
Plate；(2) military field: military position, helicopter hesitation level ground are quickly laid with；The fast constructions such as temporary road, pontoon bridge；It is impaired
Place and road surface are quickly repaired；(3) civil field: the quick laying in large foundation construction place；Desert, beach, marsh
Under the conditions of the bad working environments such as ground workbench build and the quick laying of passing road；Emergency access, temporary road stop
Parking lot；The protection on vegetation and road surface.
The research and development and application of external high-strength composite material backing plate are more early, technology maturation.The popularization in the area such as North America and Northern Europe
Using solving the problems, such as marsh ground caused by frozen soil melting layer during the rise of this area's temperature.Overseas market is mainly by the U.S.
Newpark Mats&Integrated Services company monopolizing, the said firm are current heavy backing plate systems state-of-the-art in the world
Unite manufacturer.Its heavy backing plate is the preparation of PE die press technology for forming, and concrete component is unknown.The rigidity of the backing plate is good, bearing capacity is big.
Patent application CN104117996A discloses a kind of molding high molecular weight polyethylene board material production method, to being in
Molding ultra-high molecular weight polyethylene green body under elastomeric state, carrying out mechanical cutting using thin plate cutting device keeps its thinning at plate
Material.The method high production efficiency, plate thickness is adjustable, and breadth is big, and plate face is smooth.But the plate of such method production can only be real
The heart, shape specification is more stiff, can not achieve the mold of loss of weight hollow profile design.
Patent application CN104086848A patent discloses a kind of high-pressure molding UHMWPE/PA6 alloy and preparation method thereof,
Low temperature flexibility that UHMWPE/PA6 alloy obtained had not only had ultra-high molecular weight polyethylene excellent, wearability, but also there is nylon
Excellent mechanical property and processing performance.But the cost of alloy is higher, complex process, it cannot be by squeezing out injection molding.
Therefore developing a kind of can have high-impact, high abrasion, high intensity and power by be molded and cooperate compression molding
Learning performance, good polyethylene composition is very important.
Summary of the invention
In order to overcome, high molecular weight polyethylene board material cannot be using extrusion injection molding manner, at high cost, work in the prior art
The defects of skill is complicated can have high-impact, high abrasion, height by be molded and cooperate compression molding the present invention provides a kind of
The polyethylene composition of intensity and excellent in mechanical performance.
Specifically, in a first aspect, the present invention provides a kind of polyethylene composition, contain first in the polyethylene composition
Polyethylene, the second polyethylene and inorganic filler, wherein the viscosity-average molecular weight of first polyethylene is greater than 300,000 and is 500
Ten thousand hereinafter, the weight average molecular weight of second polyethylene is 40,000-30 ten thousand.
Second aspect, the present invention also provides a kind of preparation methods of polyethylene composition, this method comprises: first is gathered
Ethylene, the second polyethylene and inorganic filler and optional antioxidant and/or stearate are uniformly mixed, and melting is then added altogether
Melt blending and extruding pelletization are carried out in mixing device；Wherein, the viscosity-average molecular weight of first polyethylene is greater than 300,000 and is
5000000 hereinafter, the weight average molecular weight of second polyethylene is 40,000-30 ten thousand.
The third aspect, the present invention also provides polyethylene compositions prepared by the preparation method.
Fourth aspect, the present invention also provides above-mentioned polyethylene compositions to prepare the application in plate.
5th aspect, the present invention also provides a kind of plate, the plate contains above-mentioned polyethylene group provided by the invention
Close object.
The advantage that the hardness that polyethylene composition provided by the invention had not only had the first polyethylene is high, wearability is good, but also tool
There is the advantages of high-impact, high intensity and excellent in mechanical performance, while cooperation press moulding mode molding can also be molded by squeezing out, it can
With the shape for using mold preparation required；Compared with prior art, cost is relatively low, and technique is simpler.Specifically, and not using this
The polyethylene composition of the technical solution of invention is compared, and the tensile break stress of polyethylene composition provided by the invention stretches
Breaking strain and simply supported beam notch impact strength improve a lot, with the excellent of high-impact, high intensity and excellent in mechanical performance
Point.In addition, polyethylene composition provided by the invention can be molded cooperation press moulding mode molding, simple process by squeezing out.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
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.
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
The present invention provides a kind of polyethylene composition, contain the first polyethylene, the second poly- second in the polyethylene composition
Alkene and inorganic filler, wherein the viscosity-average molecular weight of first polyethylene is greater than 300,000 and is 5,000,000 hereinafter, described second
The weight average molecular weight of polyethylene is 40,000-30 ten thousand.
It should be noted that well known to those skilled in the art, viscosity-average molecular weight M η and weight average molecular weight MWIt is to characterize one kind
The different modes of polymer molecular weight, and there are following relationships for the same polymer: MW>=M η, so a kind of poly-
When closing the viscosity-average molecular weight of object greater than 300,000, weight average molecular weight is naturally larger than 300,000, so even if the first polyethylene and second
The characterizing method of the molecular weight of polyethylene is different, but there is no be overlapped for the range of the two.
According to the present invention, in the polyethylene composition, first polyethylene, the second polyethylene and inorganic filler
Ratio can change in a big way.For example, with the total weight of first polyethylene and second polyethylene for 100 weights
Measure part meter, the mass fraction of first polyethylene can be 10-80 parts by weight, and the mass fraction of second polyethylene can be with
For 20-90 parts by weight, the mass fraction of the inorganic filler can be 1-50 parts by weight.Performance more preferably combines in order to obtain
Object, it is preferable that the mass fraction of first polyethylene is 20-70 parts by weight, and the mass fraction of second polyethylene is 30-
80 parts by weight, the mass fraction of the inorganic filler are 5-35 parts by weight.It is highly preferred that the mass fraction of first polyethylene
Mass fraction for 50-70 parts by weight, second polyethylene is 30-50 parts by weight, and the mass fraction of the inorganic filler is
5-25 parts by weight.
According to the present invention, the density of first polyethylene is usually in 0.92-0.96g/cm3Between, heat distortion temperature is logical
It is often 55-80 DEG C.The viscosity-average molecular weight of the first polyethylene in the present invention can for greater than 300,000 and be 5,000,000 hereinafter, it is preferred that
It is 500,000-400 ten thousand, more preferably 750,000-300 ten thousand.
In the present invention, first polyethylene can be prepared by existing various methods, commercially available can also be obtained
, as long as its viscosity-average molecular weight meets the requirements.For example, first polyethylene can be purchased from Yanshan Petrochemical.
In the present invention, second polyethylene can be prepared by existing various methods, such as slurry or gas
Phase processing method can also be commercially available, as long as its molecular weight meets the requirements.Preferably, second polyethylene
Weight average molecular weight is 40,000-30 ten thousand；Melt index MI can be 0.01-10g/10min, preferably 0.01-5g/10min；Density p
It can be 0.94-0.97g/cm3。
In the present invention, the melt index is measured according to method specified in GB/T3682-2000.Wherein, test-strips
Part includes: that temperature is 190 DEG C, load 2.16kg.
In the present invention, the viscosity-average molecular weight is measured according to method specified in ASTM D4020-2011.Wherein α value
Take 1.37.
In the present invention, the weight average molecular weight is measured according to method specified in ASTM D6474-99 (2006).
In the present invention, there is no particular limitation for the type of the inorganic filler, can be the conventional selection of this field, example
It such as can be one of silica, glass microballoon, talcum powder, barium sulfate, montmorillonite and super-fine silicon micro-powder or a variety of.It is preferred that
Ground, the inorganic filler are one of silica, glass microballoon and super-fine silicon micro-powder or a variety of.
In the present invention, the partial size of the inorganic filler can change in a big way.For example, the inorganic filler
Partial size can be 1.3-25 μm, preferably 2.6-13 μm.The partial size of inorganic filler can also be with " mesh " for unit.Such as the nothing
The partial size of machine filler is 1.3-25 μm, and corresponding partial size is 500-10000 mesh.The partial size of the inorganic filler is preferably
1000-10000 mesh.
In the present invention, the partial size of the inorganic filler can be controlled by way of screening.The mode of screening is
It is well known to those skilled in the art.For example, inorganic filler first can be passed through 500 by the inorganic filler that partial size is 500-10000 mesh
Mesh is sieved, and sieving is passed through to 10000 meshes again and is sieved, the inorganic filler on the sieve of 10000 meshes is stayed in
As meet the inorganic filler of Particle size requirements.
In the present invention, the inorganic filler can be untreated inorganic filler, be also possible to by modified inorganic
Filler.According to a kind of preferred embodiment, the inorganic filler is modified inorganic filler.Modification is those skilled in the art
Known to member, main purpose is to play the compatibility, dispersibility and one of mechanical strength and comprehensive performance for increasing component
Or a variety of effects.The method of modifying of the modified inorganic filler can be with are as follows: inorganic filler and surfactant is uniformly mixed,
Activate inorganic filler -5 hours 10 minutes.The modification preferably carries out under stirring conditions.
In the present invention, there is no particular limitation for the dosage of the inorganic filler and surface modifier, can be this field
Conventional selection.For example, the inorganic filler relative to 100 parts by weight, the dosage of the surface modifier can be 0.01-1 weight
Measure part, preferably 0.02-0.8 parts by weight.
In the present invention, the type of the surface modifier can be the conventional selection of this field.For example, the surface changes
Property agent can be silane coupling agent, titanate esters, Aluminate, perhafnate, anionic surfactant, cation surface activating
One of agent, nonionic surfactant and stearic acid are a variety of.
A kind of preferred embodiment according to the present invention, in the polyethylene composition can also containing antioxidant and/or
Stearate.The antioxidant and stearate are the typical additives of polymeric articles.
In the present invention, the type of the antioxidant can be the conventional selection of this field.For example, the antioxidant can be with
For Hinered phenols antioxidant and/or phosphite ester antioxidant；Preferably, the antioxidant is four [β-(3,5- di-t-butyls-
4- hydroxy phenyl) propionic acid] pentaerythritol ester (also known as antioxidant 1010), phosphite ester is (again for three [2,4- di-tert-butyl-phenyls]
Referred to as irgasfos 168) and β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid n-octadecyl alcohol ester (also known as antioxidant 1076)
One of or it is a variety of；The antioxidant may be compound antioxidant, such as antioxidant B215 (by weight, antioxidant
1010: irgasfos 168=1:2) and/or antioxidant B225 (by weight, antioxidant 1010: irgasfos 168=1:1).It is more excellent
Selection of land, the antioxidant are one of antioxidant 1010, irgasfos 168, antioxidant B215 and antioxidant B225 or a variety of.
In the present invention, the type of the stearate can be the conventional selection of this field.For example, the stearate
It can be calcium stearate and/or zinc stearate.
In the present invention, the dosage of the antioxidant and stearate can be the conventional selection of this field.For example, institute
It states in polyethylene composition, on the basis of the total weight of the polyethylene composition, the content of the antioxidant can be 0.1-
0.5 weight %, preferably 0.15-0.35 weight %；The content of the stearate can be 0.05-0.3 weight %, preferably
0.07-0.3 weight %.
The present invention also provides a kind of preparation methods of polyethylene composition, this method comprises: by the first polyethylene, second
Polyethylene and inorganic filler and optional antioxidant and/or stearate are uniformly mixed, and are then added in melt blending equipment
Carry out melt blending and extruding pelletization；Wherein, the viscosity-average molecular weight of first polyethylene be greater than 300,000 and be 5,000,000 with
Under, the weight average molecular weight of second polyethylene is 40,000-30 ten thousand.
According to the present invention, in the polyethylene composition, first polyethylene, the second polyethylene and inorganic filler
Dosage can change in a big way.For example, with total dosage of first polyethylene and second polyethylene for 100 weights
Part meter is measured, the dosage of first polyethylene is 10-80 parts by weight, and the dosage of second polyethylene is 20-90 parts by weight,
The dosage of the inorganic filler is 1-50 parts by weight.Performance more preferably polyethylene composition in order to obtain, it is preferable that described first
The dosage of polyethylene is 20-70 parts by weight, and the dosage of second polyethylene is 30-80 parts by weight, the use of the inorganic filler
Amount is 5-35 parts by weight.It is highly preferred that the dosage of first polyethylene is 50-70 parts by weight, the use of second polyethylene
Amount is 30-50 parts by weight, and the dosage of the inorganic filler is 5-25 parts by weight.
According to the present invention, the density of first polyethylene is usually in 0.92-0.96g/cm3Between, heat distortion temperature is logical
It is often 55-80 DEG C.The viscosity-average molecular weight of the first polyethylene in the present invention can for greater than 300,000 and be 5,000,000 hereinafter, it is preferred that
It is 500,000-400 ten thousand, more preferably 750,000-300 ten thousand.
In the present invention, first polyethylene can be prepared by existing various methods, commercially available can also be obtained
, as long as its viscosity-average molecular weight meets the requirements.For example, first polyethylene can be purchased from Yanshan Petrochemical.
In the present invention, second polyethylene can be prepared by existing various methods, such as slurry or gas
Phase processing method can also be commercially available, as long as its molecular weight meets the requirements.Preferably, second polyethylene
Weight average molecular weight is 80,000-25 ten thousand, preferably 100,000-20 ten thousand.Melt index MI can be 0.01-10g/10min, preferably
0.01-5g/10min；Density p can be 0.94-0.97g/cm3。
In the present invention, the melt index is measured according to method specified in GB/T3682-2000.Wherein, test-strips
Part includes: that temperature is 190 DEG C, load 2.16kg.
In the present invention, there is no particular limitation for the type of the inorganic filler, can be the conventional selection of this field, example
It such as can be one of silica, glass microballoon, talcum powder, barium sulfate, montmorillonite and super-fine silicon micro-powder or a variety of.It is preferred that
Ground, the inorganic filler are one of silica, glass microballoon and super-fine silicon micro-powder or a variety of.
In the present invention, the partial size of the inorganic filler can change in a big way.For example, the inorganic filler
Partial size can be 1.3-25 μm, preferably 2.6-13 μm.The partial size of inorganic filler can also be with " mesh " for unit.Such as the nothing
The partial size of machine filler is 1.3-25 μm, and corresponding partial size is 500-10000 mesh.The partial size of the inorganic filler is preferably
1000-10000 mesh.
In the present invention, the partial size of the inorganic filler can be controlled by way of screening.The mode of screening is
It is well known to those skilled in the art.For example, inorganic filler first can be passed through 500 by the inorganic filler that partial size is 500-10000 mesh
Mesh is sieved, and sieving is passed through to 10000 meshes again and is sieved, the inorganic filler on the sieve of 10000 meshes is stayed in
As meet the inorganic filler of Particle size requirements.
In the present invention, the inorganic filler can be untreated inorganic filler, be also possible to by modified inorganic
Filler.According to a kind of preferred embodiment, the inorganic filler is modified inorganic filler.Modification is those skilled in the art
Known to member, main purpose is to play the compatibility, dispersibility and one of mechanical strength and comprehensive performance for increasing component
Or a variety of effects.The method of modifying of the modified inorganic filler can be to be uniformly mixed inorganic filler and surfactant,
Activate inorganic filler -5 hours 10 minutes.
In the present invention, there is no particular limitation for the dosage of the inorganic filler and surface modifier, can be this field
Conventional selection.For example, the inorganic filler relative to 100 parts by weight, the dosage of the surface modifier can be 0.01-1 weight
Measure part, preferably 0.02-0.8 parts by weight.
A kind of preferred embodiment according to the present invention, in the polyethylene composition can also containing antioxidant and/or
Stearate.The antioxidant and stearate are the typical additives of polymeric articles.
It is retouched in addition, the type and antioxidant of surface modifier and the content and type of stearate hereinbefore have
It states, details are not described herein.
In the present invention, by the first polyethylene, the second polyethylene and inorganic filler and optional antioxidant and/or tristearin
Hydrochlorate is uniformly mixed and can carry out in mechanical mixing equipment, and the mechanical mixing equipment can be for example high-speed mixer, pinch
Conjunction machine etc..
In the present invention, by method, condition and the extrusion used of the polyethylene composition melt blending and extruding pelletization
Machine is known to those skilled in the art.The melt blending equipment can be double screw extruder, single screw extrusion machine, mill
Machine, mixer etc..There is no particular limitation for the condition of the melt blending and extruding pelletization.For example, extruder temperature can be
150-350 DEG C, engine speed can be 140-400rpm, and torque can be 40-80%.
The present invention also provides polyethylene compositions prepared by the above method.
The present invention also provides above-mentioned polyethylene compositions to prepare the application in plate.The plate is preferably paved the way
Plate.
The present invention also provides a kind of plate, the plate contains the polyethylene composition of aforementioned present invention offer.
The present invention will be described in detail by way of examples below.
In the following Examples and Comparative Examples, relevant parameter is tested in accordance with the following methods:
(1) it melt index MI: is measured according to method specified in GB/T 3682-2000, wherein test temperature is
190 DEG C, load 2.16kg；
(2) it density: is measured according to method specified in GB/T 1033.2-2010 and using density gradient column method；
(3) it tensile break stress: is measured according to method specified in GB/T 1040.2-2006；
(4) it break-draw strain: is measured according to method specified in GB/T 1040.2-2006；
(5) it simply supported beam notch impact strength: is measured according to method specified in GB/T 1043.1-2008.
(6) it viscosity-average molecular weight: is measured according to method specified in ASTM D4020-2011, wherein α value takes 1.37；
(7) it weight average molecular weight: is measured according to method specified in ASTM D6474-99 (2006).
First polyethylene and the second polyethylene are purchased from Yanshan Petrochemical；
Inorganic filler silica is purchased from Qingdao Niu Senke new material；
Inorganic filler glass microballoon is purchased from Shanghai Ming Bo new material Co., Ltd, trade mark MH；
Inorganic filler barium sulfate is purchased from Shanghai Liang Jiang titanium white heavy chemicals Co., Ltd；
Antioxidant is purchased from Shijiazhuang Jia Tuo Chemical Industry Science Co., Ltd, and the trade mark is 1010 and 168；
Calcium stearate is purchased from Jiangsu Taihu Lake chemical industry, and partial size is 325 mesh；
Surfactant is purchased from Yangzhou Tian Yang auxiliary agent Co., Ltd, and the trade mark is the compound titanate esters of TM2S.
The method that processing is modified to inorganic filler are as follows: by inorganic filler and surfactant weight ratio be 100:0.5
Ratio be uniformly mixed, at 80 DEG C stirring make inorganic filler activate 10 minutes.If without specified otherwise, embodiment and comparison
Inorganic filler used in example is the inorganic filler by modification.
Embodiment 1
The present embodiment is for illustrating polyethylene composition provided by the invention and preparation method thereof
By the first polyethylene (viscosity-average molecular weight 1,000,000, ρ=0.937g/cm of 50g3), (weight is equal for the second polyethylene of 50g
Molecular weight 200,000, MI=0.6g/10min, ρ=0.958g/cm3), 15g partial size be 10 μm silica, 0.2g antioxidant
The calcium stearate of 1010 and 0.1g is uniformly mixed by high speed agitator, and double screw extruder then is added in the material mixed
Middle progress melt blending is simultaneously granulated, and extruder temperature is 200 DEG C in process, obtains polyethylene composition.Its performance such as 1 institute of table
Show.
Embodiment 2
The present embodiment is for illustrating polyethylene composition provided by the invention and preparation method thereof
By the first polyethylene (viscosity-average molecular weight 3,000,000, ρ=0.941g/cm of 70g3), (weight is equal for the second polyethylene of 30g
Molecular weight 100,000, MI=1.4g/10min, ρ=0.954g/cm3), 5g partial size be 2.6 μm glass microballoon, 0.2g antioxidant
The calcium stearate of 168 and 0.3g is uniformly mixed by high speed agitator, and double screw extruder then is added in the material mixed
Middle progress melt blending is simultaneously granulated, and extruder temperature is 150 DEG C in process, obtains polyethylene composition.Its performance such as 1 institute of table
Show.
Embodiment 3
The present embodiment is for illustrating polyethylene composition provided by the invention and preparation method thereof
By the first polyethylene (viscosity-average molecular weight 750,000, ρ=0.939g/cm of 60g3), (weight is equal for the second polyethylene of 40g
Molecular weight 140,000, MI=1.2g/10min, ρ=0.955g/cm3), 25g partial size be 13 μm barium sulfate, 0.4g antioxidant
The calcium stearate of 1010 and 0.18g is uniformly mixed by high speed agitator, and twin-screw extrusion then is added in the material mixed
Melt blending is carried out in machine and is granulated, and extruder temperature is 350 DEG C in process, obtains polyethylene composition.Its performance such as table 1
It is shown.
Embodiment 4
The present embodiment is for illustrating polyethylene composition provided by the invention and preparation method thereof
By the second polyethylene (weight average molecular weight 80,000, MI=of the first polyethylene (viscosity-average molecular weight 4,000,000) of 40g, 60g
1.5g/10min, ρ=0.96g/cm3), 25g partial size be 10 μm of silica, the antioxidant 1010 of 0.2g and the tristearin of 0.1g
Sour calcium is uniformly mixed by high speed agitator, is then added twin-screw extrude the material mixed and is carried out melt blending simultaneously
It is granulated, extruder temperature is 200 DEG C in process, obtains polyethylene composition.Its performance is as shown in table 1.
Embodiment 5
The present embodiment is for illustrating polyethylene composition provided by the invention and preparation method thereof
By the second polyethylene (weight average molecular weight 220,000, MI of the first polyethylene (viscosity-average molecular weight 5,000,000) of 30g, 70g
=0.58g/10min, ρ=0.959g/cm3), the silica that 30g partial size is 10 μm, 0.2g antioxidant 1010 and 0.1g
Calcium stearate is uniformly mixed by high speed agitator, is then added twin-screw extrude the material mixed and melt altogether
It mixes and is granulated, extruder temperature is 350 DEG C in process, obtains polyethylene composition.Its performance is as shown in table 1.
Embodiment 6
The present embodiment is for illustrating polyethylene composition provided by the invention and preparation method thereof
By the second polyethylene (weight average molecular weight 250,000, MI of the first polyethylene (viscosity-average molecular weight 4,500,000) of 20g, 80g
=0.55g/10min, ρ=0.961g/cm3), the silica that 35g partial size is 10 μm, 0.2g antioxidant 1010 and 0.1g
Calcium stearate is uniformly mixed by high speed agitator, is then added twin-screw extrude the material mixed and melt altogether
It mixes and is granulated, extruder temperature is 350 DEG C in process, obtains polyethylene composition.Its performance is as shown in table 1.
Embodiment 7
The present embodiment is for illustrating polyethylene composition provided by the invention and preparation method thereof
It is carried out according to the preparation method of embodiment 1, unlike, the partial size of the silica is 18 μm.Its performance is such as
Shown in table 1.
Comparative example 1
This comparative example is for illustrating polyethylene composition of reference and preparation method thereof
Polyethylene composition is prepared according to the method for embodiment, the difference is that the dosage of the first polyethylene is 100g, is not made
With the second polyethylene.As a result can not extruding pelletization, polyethylene composition can only be obtained by way of molding.Its performance such as table 1
It is shown.
Comparative example 2
This comparative example is for illustrating polyethylene composition of reference and preparation method thereof
Polyethylene composition is prepared according to the method for embodiment, the difference is that the dosage of the second polyethylene is 100g, is not made
With the first polyethylene.Its performance is as shown in table 1.
Comparative example 3
This comparative example is for illustrating polyethylene composition of reference and preparation method thereof
Polyethylene composition is prepared according to the method for embodiment, unlike, do not use inorganic filler silica.Its property
It can be as shown in table 1.
Table 1
Note: in table 1, P indicates that portion fractures, C indicate fracture completely.
It can be seen that compared with the polyethylene product of the prior art from the result of embodiment and comparative example, of the invention is poly-
Tensile break stress, tension failure strain and the simply supported beam notch impact strength of vinyl composition improve a lot, and have height
The advantages of anti-impact, high intensity and excellent in mechanical performance.In addition, polyethylene composition provided by the invention can be molded by squeezing out
Cooperate press moulding mode molding, simple process.
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 (13)
1. a kind of polyethylene composition, which is characterized in that in the polyethylene composition containing the first polyethylene, the second polyethylene and
Inorganic filler；
Wherein, the viscosity-average molecular weight of first polyethylene be greater than 300,000 and be 5,000,000 hereinafter, second polyethylene weight
Average molecular weight is 40,000-30 ten thousand.
2. polyethylene composition according to claim 1, wherein poly- with described first in the polyethylene composition
The total weight of ethylene and second polyethylene is 100 parts by weight meters, and the mass fraction of first polyethylene is 10-80 weight
Part, the mass fraction of second polyethylene is 20-90 parts by weight, and the mass fraction of the inorganic filler is 1-50 parts by weight；
Preferably, the mass fraction of first polyethylene is 20-70 parts by weight, and the mass fraction of second polyethylene is 30-80
Parts by weight, the mass fraction of the inorganic filler are 5-35 parts by weight.
3. polyethylene composition according to claim 1, wherein the viscosity-average molecular weight of first polyethylene is 500,000-
4000000, preferably 750,000-300 ten thousand；
Preferably, the density p of first polyethylene is 0.92-0.96g/cm3。
4. polyethylene composition according to claim 1, wherein the weight average molecular weight of second polyethylene is 80,000-25
Ten thousand, preferably 100,000-20 ten thousand；
Preferably, melt index MI of second polyethylene in the case where temperature is 190 DEG C, load is 2.16kg is 0.01-10g/
10min；
It is highly preferred that the density p of second polyethylene is 0.94-0.97g/cm3。
5. polyethylene composition according to claim 1, wherein the inorganic filler is silica, glass microballoon, cunning
One of mountain flour, calcium carbonate, barium sulfate, montmorillonite and super-fine silicon micro-powder are a variety of；
Preferably, the partial size of the inorganic filler is 1.3-13 μm, more preferably 2.6-13 μm.
6. polyethylene composition according to claim 1 or 5, wherein the inorganic filler is modified inorganic filler, this changes
Property inorganic filler method of modifying are as follows: inorganic filler and surfactant are uniformly mixed, make inorganic filler living at 70-90 DEG C
Change -5 hours 10 minutes；
Preferably, the inorganic filler relative to 100 parts by weight, the dosage of the surface modifier is 0.01-1 parts by weight, more excellent
It is selected as 0.02-0.8 parts by weight.
7. polyethylene composition according to claim 6, wherein the surface modifier be silane coupling agent, titanate esters,
In Aluminate, perhafnate, anionic surfactant, cationic surfactant, nonionic surfactant and stearic acid
It is one or more.
8. polyethylene composition according to claim 1, wherein in the polyethylene composition also containing antioxidant and/
Or stearate；
Preferably, the antioxidant is Hinered phenols antioxidant and/or phosphite ester antioxidant；
It is highly preferred that the stearate is calcium stearate and/or zinc stearate；
It is further preferred that in the polyethylene composition, it is described anti-on the basis of the total weight of the polyethylene composition
The content of oxygen agent is 0.1-0.5 weight %, and the content of the stearate is 0.05-0.3 weight %.
9. a kind of preparation method of polyethylene composition, which is characterized in that this method comprises: by the first polyethylene, the second poly- second
Alkene and inorganic filler and optional antioxidant and/or stearate are uniformly mixed, and are then added in melt blending equipment and are carried out
Melt blending and extruding pelletization；
Wherein, the viscosity-average molecular weight of first polyethylene be greater than 300,000 and be 5,000,000 hereinafter, second polyethylene weight
Average molecular weight is 40,000-30 ten thousand.
10. preparation method according to claim 9, wherein in the polyethylene composition, with first polyethylene
Total dosage with second polyethylene is 100 parts by weight meters, and the dosage of first polyethylene is 10-80 parts by weight, institute
The dosage for stating the second polyethylene is 20-90 parts by weight, and the dosage of the inorganic filler is 1-50 parts by weight；Preferably, described
The dosage of one polyethylene is 20-70 parts by weight, and the dosage of second polyethylene is 30-80 parts by weight, the inorganic filler
Dosage is 5-35 parts by weight.
11. the polyethylene composition that the preparation method as described in claim 9 or 10 is prepared.
12. polyethylene composition described in any one of claim 1-8 and 11 is preparing the application in plate.
13. a kind of plate, which is characterized in that the plate contains polyethylene described in any one of claim 1-8 and 11
Composition.
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| CN114214886A (en) * | 2022-01-19 | 2022-03-22 | 山东科元塑业有限公司 | Pressure bearing plate for coal mine and manufacturing method thereof |
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