CN106117769B - A kind of EVA splash guard and preparation method thereof - Google Patents
A kind of EVA splash guard and preparation method thereof Download PDFInfo
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- CN106117769B CN106117769B CN201610517519.6A CN201610517519A CN106117769B CN 106117769 B CN106117769 B CN 106117769B CN 201610517519 A CN201610517519 A CN 201610517519A CN 106117769 B CN106117769 B CN 106117769B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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Abstract
The invention discloses a kind of EVA splash guards and preparation method thereof, its composition includes: 10~30 mass parts of high density polyethylene (HDPE), 10~30 mass parts of metallocene catalysis linear low density polyethylene, 20~30 mass parts of ethylene-vinyl acetate copolymer, 20~60 mass parts of linear low density polyethylene, 0.3~1.5 mass parts of antioxidant.Metallocene catalysis linear low density polyethylene in EVA splash guard formula composition in the present invention improves the tensile strength and elongation percentage of the EVA splash guard generated, and improve the tearing strength of EVA splash guard, to improve the overall performance of EVA splash guard, the content of vinylacetate in splash guard is not less than 5mas%, the flexibility and sweat soldering performance of splash guard has been effectively ensured, tensile strength 18MPa or more, 650% or more the elongation percentage, tearing strength 100KN/m or more for the EVA splash guard being prepared, have excellent mechanical property.
Description
Technical field
The invention belongs to waterproof construction technical fields, and in particular to a kind of EVA splash guard and preparation method thereof.
Background technique
Splash guard is called geomembrane, and the geomembrane that thickness is traditionally more than or equal to 0.8mm thickness is less than splash guard
0.8mm thickness is geomembrane, it is to be divided into homogeneous waterproof using high molecular polymer as a kind of impervious material made of base stock
Plate and compound water-proof.The major function of splash guard is the leakage for preventing liquid and the volatilization of gas, and splash guard is in rock engineering
In effect it is predominantly anti-blend isolation, but also function to the effect of reinforcement and protection simultaneously.It is mainly used in: native stone
The antiseepage of the engineerings such as dam, rock-fill dams, stone masonry dam, concrete dam, tailing dam, sewage reservoir dam, channel, liquid storage pool, subway, basement
With tunnel anti-leakage lining, the antiseepage of road and rail ground, tie filament geotextiles, bentonite waterproof blanket in sanitary garbage landfill yard
Equal earth working materials use etc..
EVA (ethylene-vinyl acetate copolymer) splash guard is a kind of suitable for various culverts, the drainage systems in tunnel,
Its elasticity, flexible, permeability is good, and has good resistance to low temperature, and thermal decomposition temperature is lower, and about 230 DEG C or so,
But the status that the most EVA splash guard quality in market is irregular, have that such as VA (vinylacetate) content is few, mechanical property
The problems such as difference and sweat soldering construction be not firm.
Summary of the invention
It is anti-the technical problem to be solved by the present invention is to aiming at the above shortcomings existing in the prior art, provide a kind of EVA
Water plate and preparation method thereof, the EVA that the metallocene catalysis linear low density polyethylene in EVA splash guard not only increases generation are anti-
The tensile strength and elongation percentage of water plate, can also be improved the tearing strength of EVA splash guard, to improve EVA splash guard
Overall performance.
It solves technical solution used by present invention problem and is to provide a kind of EVA splash guard, composition includes: highly dense
Spend polyethylene (HDPE) 10~30 mass parts, 10~30 mass parts of metallocene catalysis linear low density polyethylene (MLLDPE), second
20~30 mass parts of alkene-acetate ethylene copolymer (EVA), 20~60 mass parts of linear low density polyethylene (LLDPE), antioxidant
0.3~1.5 mass parts.Wherein, linear low density polyethylene does not include that the metallocene catalysis that reacts of metallocene catalysis is linear
Low density polyethylene (LDPE).
Preferably, the melt index of the high density polyethylene (HDPE) be 0.01~2.0g/10min, density be 0.940~
0.955g/cm3。
Preferably, the melt index of the metallocene catalysis linear low density polyethylene is 0.5~5.0g/10min, close
Degree is 0.915~0.930g/cm3。
Preferably, the melt index of the linear low density polyethylene is 0.5~3.0g/10min.
Preferably, the content of the vinylacetate (VA) in the ethylene-vinyl acetate copolymer be 15~
30mas%.
Preferably, the antioxidant be one of antioxidant 1010, irgasfos 168, antioxidant 1076 or it is a kind of with
On mixture.Wherein, the antioxidant 1010 was four [methyl-β-(3,5- di-tert-butyl-hydroxy phenyl) propionic ester] seasons
Doutrate, the irgasfos 168 are three [2.4- di-tert-butyl-phenyl] phosphite esters, and the antioxidant 1076 is β-(3,5-
Di-tert-butyl-hydroxy phenyl) propionic acid n-octadecyl alcohol ester.
It is further preferred that the antioxidant is antioxidant 1010.
The present invention provides a kind of preparation method of above-mentioned EVA splash guard, comprising the following steps:
(1) ingredient: raw material is weighed respectively by the composition of splash guard；
(2) mixing: the raw material is added in high-speed mixer and is mixed, wherein step (2) the mixing temperature
Degree is 70 ± 10 DEG C, incorporation time 10-15 minutes, has optimal compounding effect；
(3) it is granulated: blending granulation is carried out using double screw extruder；
(4) it squeezes out: melting extrusion is carried out using single screw extrusion machine；
(5) it forms；
(6) cooling: cooling using air；
(7) it winds.
Preferably, the spiral shell of the double screw extruder in the step (3) and the single screw extrusion machine in the step (4)
The processing temperature setting of bar is consistent, is respectively 160 ± 5 DEG C, 170 ± 5 DEG C, 180 ± 5 in feeding section, melt zone, metering section temperature
℃。
Preferably, the molding in the step (5) is melted specifically using the used draping filter filtering of material after squeezing out
The pressurization pumping of body metering pump, it is in blocks to cross T-die, then form through three-roller calendar press polish, the three-roller calendar press polish molding
Three roll temperatures be respectively 60 ± 3 DEG C, 60 ± 3 DEG C, 50 ± 3 DEG C.
The high density polyethylene (HDPE) in EVA splash guard formula composition in the present invention makes splash guard is with higher to stretch by force
Degree and tearing strength, linear low density polyethylene make splash guard tensile strength with higher and elongation percentage, metallocene catalysis
Linear low density polyethylene not only increases the tensile strength and elongation percentage of the EVA splash guard of generation, also improves EVA splash guard
Tearing strength, to improve the overall performance of EVA splash guard, the content of the vinylacetate in splash guard is not less than
The flexibility and sweat soldering performance of splash guard, the tensile strength for the EVA splash guard being prepared has been effectively ensured in 5mas%
18MPa or more, 650% or more elongation percentage, tearing strength 100KN/m or more, have excellent mechanical property, prepare product sheet material
Seam peel strength is excellent, is that sheet body is destroyed, the reliability of overlap edge has been effectively ensured.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, With reference to embodiment to this
Invention is described in further detail.
Embodiment 1
The present embodiment provides a kind of EVA splash guard, composition includes:
Wherein, the melt index of the high density polyethylene (HDPE) is 1.0g/10min, density 0.940g/cm3；The cyclopentadienyl gold
The melt index for belonging to catalyzed linear low density polyethylene (LDPE) is 0.5g/10min, density 0.930g/cm3；The linea low density
The melt index of polyethylene is 0.5g/10min.
The present embodiment provides a kind of preparation methods of above-mentioned EVA splash guard, comprising the following steps:
(1) ingredient: raw material is weighed respectively in the component and ratio of above-mentioned EVA splash guard composition；
(2) it mixing: adds raw materials into high-speed mixer and is stirred；
(3) it is granulated: blending granulation is carried out using double screw extruder；
(4) it squeezes out: melting extrusion is carried out using single screw extrusion machine；
(5) form: the used draping filter filtering of material after extrusion, melt metering pump pressurization pumping, cross T-die at
Piece, then formed through three-roller calendar press polish；
(6) cooling: cooling using air；
(7) it winds.
The high density polyethylene (HDPE) in EVA splash guard formula composition in the present embodiment makes splash guard stretching with higher
Intensity and tearing strength, linear low density polyethylene urge splash guard tensile strength with higher and elongation percentage, metallocene
Change tensile strength and elongation percentage that linear low density polyethylene not only increases the EVA splash guard of generation, also improves EVA waterproof
The tearing strength of plate, to improve the overall performance of EVA splash guard, the content of the vinylacetate in splash guard is not less than
The flexibility and sweat soldering performance of splash guard, the tensile strength for the EVA splash guard being prepared has been effectively ensured in 5mas%
18MPa or more, 650% or more elongation percentage, tearing strength 100KN/m or more, have excellent mechanical property, prepare product sheet material
Seam peel strength is excellent, is that sheet body is destroyed, the reliability of overlap edge has been effectively ensured.
Comparative example 1
This comparative example provides a kind of splash guard, and composition includes:
20 mass parts of high density polyethylene (HDPE),
80 mass parts of linear low density polyethylene,
0.3 mass parts of antioxidant 1010.
The main performance index and testing result of EVA splash guard in embodiment 1 are as shown in table 1 below, and in comparative example 1
Splash guard compare:
Table 1
As seen from the above table, the existing products in markets in comparative example 1 does not add enough EVA trees as requested mostly
Rouge, although such product mechanical property is up to standard, VA content is unqualified.VA content in EVA splash guard in embodiment 1 is closed
Lattice, and each mechanical index is qualified.
Embodiment 2
The present embodiment provides a kind of EVA splash guard, composition includes:
Wherein, the melt index of the high density polyethylene (HDPE) is 0.01g/10min, density 0.955g/cm3；The cyclopentadienyl
The melt index of metal catalytic linear low density polyethylene is 2.0g/10min, density 0.915g/cm3；It is described linear low close
The melt index for spending polyethylene is 3.0g/10min.
The present embodiment provides a kind of preparation methods of above-mentioned EVA splash guard, comprising the following steps:
(1) ingredient: raw material is weighed respectively in the component and ratio of above-mentioned EVA splash guard composition；
(2) it mixing: adds raw materials into high-speed mixer and is stirred；
(3) it is granulated: blending granulation is carried out using double screw extruder；
(4) it squeezes out: melting extrusion is carried out using single screw extrusion machine；
(5) form: the used draping filter filtering of material after extrusion, melt metering pump pressurization pumping, cross T-die at
Piece, then formed through three-roller calendar press polish；
(6) cooling: cooling using air；
(7) it winds.
Wherein, step (2) mixture temperature is 70 ± 10 DEG C, incorporation time 10-15 minutes, has optimal mixing effect
Fruit.
Wherein, the double screw extruder in the step (3) and the screw rod of the single screw extrusion machine in the step (4)
Processing temperature setting is consistent, is respectively 160 ± 5 DEG C, 170 ± 5 DEG C, 180 ± 5 DEG C in feeding section, melt zone, metering section temperature.
Wherein, molding three roll temperature of step (5) the three-roller calendar press polish is respectively 60 ± 3 DEG C, 60 ± 3
℃、50±3℃。
The high density polyethylene (HDPE) in EVA splash guard formula composition in the present embodiment makes splash guard stretching with higher
Intensity and tearing strength, linear low density polyethylene urge splash guard tensile strength with higher and elongation percentage, metallocene
Change tensile strength and elongation percentage that linear low density polyethylene not only increases the EVA splash guard of generation, also improves EVA waterproof
The tearing strength of plate, to improve the overall performance of EVA splash guard, the content of the vinylacetate in splash guard is not less than
The flexibility and sweat soldering performance of splash guard, the tensile strength for the EVA splash guard being prepared has been effectively ensured in 5mas%
18MPa or more, 650% or more elongation percentage, tearing strength 100KN/m or more, have excellent mechanical property, prepare product sheet material
Seam peel strength is excellent, is that sheet body is destroyed, the reliability of overlap edge has been effectively ensured.
Comparative example 2
This comparative example provides a kind of EVA splash guard, and composition includes:
The main performance index and testing result of EVA splash guard in embodiment 2 are as shown in table 2 below, and in comparative example 2
Splash guard compare:
Table 2
As seen from the above table, if the existing products in markets in comparative example 2 adds enough EVA resins as requested, VA contains
Amount can be up to standard, but often tearing strength is unqualified for such product.In comparative example 2, high density polyethylene (HDPE) is used to improve generation
The tensile strength and tearing strength of EVA splash guard, the stretching that linear low density polyethylene is used to improve the EVA splash guard generated are strong
Degree and elongation percentage, but the addition of linear low density polyethylene will be greatly reduced the tearing strength of EVA splash guard.And embodiment 2
In, metallocene catalysis linear low density polyethylene not only increases the tensile strength and elongation percentage of the EVA splash guard of generation, also mentions
The high tearing strength of EVA splash guard, to improve the overall performance of EVA splash guard, EVA splash guard items mechanical property is closed
Lattice.
Embodiment 3
The present embodiment provides a kind of EVA splash guard, composition includes:
Wherein, the melt index of the high density polyethylene (HDPE) is 2.0g/10min, density 0.950g/cm3；The cyclopentadienyl gold
The melt index for belonging to catalyzed linear low density polyethylene (LDPE) is 5.0g/10min, density 0.920g/cm3；The linea low density
The melt index of polyethylene is 1.8g/10min.
The preparation method of EVA splash guard in the present embodiment is identical as the preparation method in embodiment 2.
Comparative example 3
This comparative example provides a kind of EVA splash guard, and composition includes:
The main performance index and testing result of EVA splash guard in embodiment 3 are as shown in table 2 below, and in comparative example 3
Splash guard compare:
As seen from the above table, if the existing products in markets in comparative example 3 adds enough EVA resins as requested, VA contains
Amount can be up to standard, but often elongation percentage is unqualified for such product.
It can be seen from above-described embodiment that introducing high density polyethylene (HDPE) (HDPE), the metallocene of present invention novelty are urged
Change the components such as linear density polyethylene (MLLDPE) and simultaneously carry out formulation optimization, has on the basis of guaranteeing VA content >=5% excellent
Different mechanical property and sweat soldering performance, efficiently solves relevant issues existing for existing market product, and EVA splash guard is every
Mechanical property is qualified.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a kind of EVA splash guard, which is characterized in that its composition includes: 10~30 mass parts of high density polyethylene (HDPE), metallocene catalysis
10~30 mass parts of linear low density polyethylene, 20~30 mass parts of ethylene-vinyl acetate copolymer, linear low density polyethylene
20~60 mass parts, 0.3~1.5 mass parts of antioxidant, the content of the vinylacetate in the ethylene-vinyl acetate copolymer
For 15~30mas%, wherein the linear low density polyethylene does not include the metallocene catalysis line that metallocene catalysis reacts
Property low density polyethylene (LDPE).
2. EVA splash guard according to claim 1, which is characterized in that the melt index of the high density polyethylene (HDPE) is
0.01~2.0g/10min.
3. EVA splash guard according to claim 1, which is characterized in that the density of the high density polyethylene (HDPE) be 0.940~
0.955g/cm3。
4. EVA splash guard according to claim 1, which is characterized in that the metallocene catalysis linear low density polyethylene
Melt index be 0.5~5.0g/10min.
5. EVA splash guard according to claim 1, which is characterized in that the metallocene catalysis linear low density polyethylene
Density be 0.915~0.930g/cm3。
6. EVA splash guard according to claim 1, which is characterized in that the melt index of the linear low density polyethylene
For 0.5~3.0g/10min.
7. a kind of preparation method of the EVA splash guard in claim 1~6 any one, which is characterized in that including following step
It is rapid:
(1) ingredient: raw material is weighed respectively by the composition of splash guard；
(2) mixing；
(3) it is granulated: blending granulation is carried out using double screw extruder；
(4) it squeezes out: melting extrusion is carried out using single screw extrusion machine；
(5) it forms；
(6) cooling；
(7) it winds.
8. the preparation method of EVA splash guard according to claim 7, which is characterized in that the twin-screw in the step (3)
The processing temperature setting of the screw rod of single screw extrusion machine in extruder and the step (4) is consistent, feeding section, melt zone,
Metering section temperature is respectively 160 ± 5 DEG C, 170 ± 5 DEG C, 180 ± 5 DEG C.
9. the preparation method of EVA splash guard according to claim 7, which is characterized in that the molding tool in the step (5)
Body by step (4) squeeze out after material with draping filter filter, by melt metering pump be pressurized pump, cross T-die it is in blocks,
Formed again through three-roller calendar press polish, molding three roll temperature of three-roller calendar press polish is respectively 60 ± 3 DEG C, 60 ± 3 DEG C,
50±3℃。
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| CN106928527A (en) * | 2017-03-24 | 2017-07-07 | 北京博瑞众诚科技有限公司 | A kind of fire-resistant waterproof plate and its manufacture method |
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| CN107936335A (en) * | 2017-11-01 | 2018-04-20 | 福建中意铁科新型材料有限公司 | A kind of fire-retardant EVA splash guards and preparation method thereof |
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| CN112029185B (en) * | 2020-09-02 | 2022-10-04 | 中国铁道科学研究院集团有限公司金属及化学研究所 | High-strength and puncture-resistant geomembrane and preparation method and application thereof |
| CN112210158A (en) * | 2020-10-10 | 2021-01-12 | 贵州时代铁建工程材料有限公司 | EVA (ethylene-vinyl acetate copolymer) antistatic flame-retardant waterproof board for tunnel |
| CN113682015A (en) * | 2021-07-28 | 2021-11-23 | 金旸（厦门）新材料科技有限公司 | Composite waterproof coiled material and preparation method thereof |
| CN115558190A (en) * | 2022-02-08 | 2023-01-03 | 泰安路佳工程材料有限公司 | High-strength waterproof board and preparation method thereof |
| CN117126613B (en) * | 2023-10-25 | 2024-01-02 | 河北金坤工程材料有限公司 | High-strength and good-flexibility self-adhesive film plastic water stop |
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