CN103665508B - A kind of drip irrigation pipe polyethylene composition - Google Patents
A kind of drip irrigation pipe polyethylene composition Download PDFInfo
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- CN103665508B CN103665508B CN201210350708.0A CN201210350708A CN103665508B CN 103665508 B CN103665508 B CN 103665508B CN 201210350708 A CN201210350708 A CN 201210350708A CN 103665508 B CN103665508 B CN 103665508B
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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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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- 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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- 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
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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Abstract
A kind of drip irrigation pipe polyethylene composition, belongs to technical field of polymer materials, is specifically related to a kind of polyethylene composition.It is characterized in that, each component and weight part thereof are: high-density polyethylene resin 40 ~ 60 parts, high pressure polyethylene resin 20 ~ 30 parts, metallocene PE resin 10 ~ 30 parts, 0.15 ~ 1.2 part, oxidation inhibitor, carbon black 1.2 ~ 3 parts.Said composition, except having good intensity, snappiness, processing characteristics and ageing-resistant performance, also has excellent wear resistance, ESCR performance, puncture resistance and the hydrostatic performance of good high temperature.
Description
Technical field
A kind of drip irrigation pipe polyethylene composition, belongs to technical field of polymer materials, is specifically related to a kind of polyethylene composition.
Background technology
Polyethylene, owing to having good over-all properties as snappiness, winter hardiness and processing characteristics etc., is widely used in preparing various tubing, as water service pipe, gas line, cable sheath tube, water shoot, agricultural pipe etc.Drip irrigation pipe (band) is the one of agricultural pipe, very fast at China's tempo at present.Require the existing higher-strength of raw material of preparation drip irrigation pipe, there are again good snappiness, winter hardiness, resistance to hydrostatic performance, resisting environmental stress and cracking (ESCR) performance, light aging resisting property and resistance toheat etc., when producing tubing, there is good processing characteristics, meet High-speed machining requirement, tubing folding resistance, the snappiness of production are good.
Current drip irrigation pipe raw material uses more resin to be the blend of LDPE and LLDPE or the blend of HDPE and LLDPE, also has and uses other raw material.As Lanzhou Petrochemical Company Petroleum Chemical Engineering Institute resin based on LLDPE, adding oxidation inhibitor and acid-acceptor, by adding the method for superoxide in an extruder, preparing drip irrigation pipe PP Pipe Compound.
Chinese patent CN1569940A " a kind of drip irrigation pipe polyethylene composition " discloses a kind of drip irrigation pipe polyethylene composition, and said composition comprises Low Density Polyethylene, linear low density polyethylene and carbon black masterbatch.
Chinese patent ZL99119649.X " a kind of low-density polyethylene composition and tubing thereof " discloses a kind of composition, said composition is mixed in the proper ratio by Low Density Polyethylene, high density polyethylene(HDPE), polypropylene, ethylene/alpha-olefin copolymer, adds appropriate amount of addition agent (as stablizer, flow ability modifying agent, dispersion agent, tinting material etc.) and makes.
Chinese patent ZL99119657.0 " medium-density polyethylene composition and thin-wall pipes thereof " discloses a kind of composition, and composition is made up of medium-density polyethylene, polypropylene, ethylene/alpha-olefin copolymer and appropriate amount of addition agent (as stablizer, dispersion agent, tinting material, flowing stablizer etc.).
Chinese patent 200510042698.4 " material compositions of ultrathin strap of trickle irrigation " discloses a kind of composition, said composition includes the medium-density polyethylene of 40% ~ 60%, the ethene-vinyl acetate copolymer of 4% ~ 10%, the high-pressure polyethylene of 16% ~ 22%, the low pressure polyethylene of 15% ~ 20%, the carbon black of 1% ~ 5%, the nano-calcium carbonate of 1% ~ 5%.
Drip irrigation pipe prepared by above-mentioned composition has good over-all properties in intensity, snappiness, processing characteristics and ageing-resistant performance etc., but in resistance to hydrostatic performance, ESCR performance, resistance toheat, wear resistance and tensile strength etc. also Shortcomings.In actual use, due to when the deficiency of above-mentioned performance may occur laying drip irrigation pipe due to material wear ability, puncture performance is bad is scratched by the soil block in soil or hard object the phenomenon even galled.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provides a kind of a kind of drip irrigation pipe polyethylene composition having excellent wear resistance, ESCR performance, puncture resistance and the hydrostatic performance of good high temperature.
The technical solution adopted for the present invention to solve the technical problems is: this kind of drip irrigation pipe polyethylene composition, it is characterized in that, each component and weight part thereof are: high-density polyethylene resin (HDPE) 40 ~ 60 parts, high pressure polyethylene resin (LDPE) 20 ~ 30 parts, metallocene PE resin (mLLDPE) 10 ~ 30 parts, 0.15 ~ 1.2 part, oxidation inhibitor, carbon black 1.2 ~ 3 parts.
Preferably, the fluoroelastomer of 0.3 weight part is added in composition.The processing characteristics of composition can be improved as processing aid.
The density of described composition medium high density polyethylene resin is 0.940 ~ 0.950g/cm
3, melt mass flow rate (21.6kg) is 8 ~ 14g/10min, and weight-average molecular weight is 180,000 ~ 300,000.The too low composition of molecular weight will not reach necessary intensity, but molecular weight can not be too high, and molecular weight is too high not easily to be plastified, and can not meet the demand of High-speed machining.
The Breadth parameter of molecular weight distribution of described high-density polyethylene resin is 20 ~ 40.To guarantee that the drip irrigation zone adopting composition to prepare has good processing characteristics, can High-speed machining.The high-density polyethylene resin that chromium-based catalysts is produced has wider molecular vibrational temperature.
Preferably, described high-density polyethylene resin is the high-density polyethylene resin that chromium-based catalysts is produced.
Composition medium high density polyethylene weight resin number is higher, for making composition have higher ESCR performance, and ESCR performance (100%TX-10 solvent, 100 DEG C, the F of high-density polyethylene resin
0) >1000h.
In described composition, metallocene PE resin is the hervene copolymer linear low density polyethylene adopting metallocene catalyst to prepare, and density is 0.915 ~ 0.940g/cm
3, melt mass flow rate (2.16kg) 0.5 ~ 2g/10min, Breadth parameter of molecular weight distribution 2 ~ 4, weight-average molecular weight 10 ~ 150,000, molar comonomer percentage composition is 0.5 ~ 3%.
Metallocene PE resin is owing to having preferably branched chain distribution, and therefore material puncture resistance is given prominence to, and have good ESCR performance, the hydrostatic strength under hot conditions is good.But metallocene PE resin price is higher, processing characteristics more common LLDPE resin is poor simultaneously, and the addition therefore in composition is also not easily too many.
Add a certain amount of high pressure polyethylene resin in composition and can ensure that composition can realize High-speed machining and prepare drip irrigation pipe (band), guarantee that composition has good processing characteristics and provides the snappiness of goods necessity, do not occur that side is split when curling depositing, and make the folding line after coil pipe can not the ESCR performance and withstand voltage properties etc. of tubing in deteriorated use procedure.High pressure polyethylene resin addition must have moderate scope, and addition is few, and drip irrigation pipe (band) snappiness is poor, and the processing characteristics of composition is bad, and addition is large, composition good processability, but strength degradation.
Described high pressure polyethylene resin uses density 0.915 ~ 0.925g/cm
3, the film material of melt mass flow rate (2.16kg) 1.5 ~ 2.5g/10min.
Because drip irrigation pipe (band) is applied to outdoor, stand sun exposure, sun exposure understands the aging of accelerated material, and product properties is deteriorated, and reduces work-ing life.For improving goods work-ing life, need add the steady agent of light inlet, the UVResistant effect of carbon black is good and inexpensively can be used as anti ultraviolet agent.
Preferably, described carbon black adopts master batch form to add, black masterbatch concentration 30 ~ 50%.The result of use of carbon black can be guaranteed.For the light aging resisting effect making composition reach necessary, suggestion addition is 4 ~ 8 parts, guarantees that in composition, carbon black effective content is 2.0 ~ 2.5%.
Described antioxidant is the composition of three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester and four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester by weight 3:2.
Drip irrigation pipe (band) will bear higher processing temperature in the course of processing, is usually greater than 240 DEG C, have even close to 300 DEG C.For avoiding material thermal destruction, need containing a certain amount of processed-type antioxidant in composition, as three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester.Simultaneously, drip irrigation pipe (band) in use, due to internal water for a long time flowing can take part of auxiliary out of and the drip irrigation pipe of black (band) easily heat absorption the temperature of material is raised, therefore resistant to elevated temperatures long-acting oxidation inhibitor such as four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester in the composition also must containing certain amount.
For mechanical property, the aging resistance of the High-speed machining performance and goods of guaranteeing composition, composition need meet: melt mass flow rate is greater than 12g/10min, and tensile strength is greater than 20MPa, and shock strength is greater than 50MPa, hardness (shore D) is greater than 50, ESCR and is greater than 200h.
The preparation method of composition: add in high-speed stirring still after above-mentioned each component is weighed in proportion, be uniformly mixed rear discharging, obtain composition.
Compared with prior art, the beneficial effect that a kind of drip irrigation pipe polyethylene composition of the present invention has is: said composition is except having good intensity, snappiness, processing characteristics and ageing-resistant performance, also there is excellent wear resistance, ESCR performance, puncture resistance and the hydrostatic performance of good high temperature, can be used for preparing high speed extrusion drip irrigation pipe (band), due to drip irrigation pipe material wear ability, the puncture performance deficiency phenomenon of being scratched by the soil block in soil or hard object when avoiding laying in farmland.
Embodiment
In embodiment 1 ~ 6 and comparative example 1 ~ 3, component is mass fraction.
Embodiment 1
High-density polyethylene resin, 50 parts (density is 0.945g/cm
3, melt mass flow rate is 12g/10min, weight-average molecular weight 260,000, Breadth parameter of molecular weight distribution 22, ESCR>1000h, and chromium-based catalysts is produced).
High pressure polyethylene resin, 25 parts (density is 0.919g/cm
3, melt mass flow rate is 2.0g/10min).
Metallocene PE resin, 25 parts of (density 0.920g/cm
3, melt mass flow rate 1.0g/10min, Breadth parameter of molecular weight distribution 3.08, weight-average molecular weight 12.35 ten thousand, molar comonomer percentage composition is 2.53%).
Black masterbatch, 4 parts (masterbatch concentration 50%).
Oxidation inhibitor, three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester 0.2 part, four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.15 part.
Embodiment 2
High-density polyethylene resin, 40 parts (density is 0.945g/cm
3, melt mass flow rate is 12g/10min, weight-average molecular weight 260,000, and Breadth parameter of molecular weight distribution 22, ESCR>1000h chromium-based catalysts is produced).
High pressure polyethylene resin, 20 parts (density is 0.915g/cm
3, melt mass flow rate is 2.5g/10min).
Metallocene PE resin, 20 parts (Qilu Petrochemical Company produces metallocene PE QHM22F, density 0.937g/cm
3, melt mass flow rate 0.6g/10min, Breadth parameter of molecular weight distribution 3.46, weight-average molecular weight 14.6 ten thousand, molar comonomer percentage composition is 0.59%).
Black masterbatch, 5 parts (masterbatch concentration 40%).
Oxidation inhibitor, three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester 0.15 part, β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid octadecyl ester, 0.15 part, four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.1 part.
Embodiment 3
High-density polyethylene resin, 50 parts (density is 0.940g/cm
3, melt mass flow rate is 14g/10min, weight-average molecular weight 180,000, Breadth parameter of molecular weight distribution 20, ESCR>1000h, and chromium-based catalysts is produced).
High pressure polyethylene resin, 25 parts (density is 0.925g/cm
3, melt mass flow rate is 1.5g/10min).
Metallocene PE resin, 20 parts of (density 0.915g/cm
3, melt mass flow rate 2.0g/10min, Breadth parameter of molecular weight distribution 2, weight-average molecular weight 100,000, molar comonomer percentage composition is 0.5%).
Black masterbatch, 4 parts (masterbatch concentration 30%).
Oxidation inhibitor, three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester 0.15 part, four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.1% part.
Fluoroelastomer, 0.3 part.
Embodiment 4
High-density polyethylene resin, 50 parts (density is 0.950g/cm
3, melt mass flow rate is 8g/10min, weight-average molecular weight 300,000, Breadth parameter of molecular weight distribution 40, ESCR>1000h, and chromium-based catalysts is produced).
High pressure polyethylene resin, 25 parts (density is 0.923g/cm
3, melt mass flow rate is 2.3g/10min).
Metallocene PE resin, 15 parts of (density 0.940g/cm
3, melt mass flow rate 0.5g/10min, Breadth parameter of molecular weight distribution 4, weight-average molecular weight 150,000, molar comonomer percentage composition is 3%).
Black masterbatch, 6 parts (masterbatch concentration 50%).
Oxidation inhibitor, three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester 0.09 part, four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.48 part.
Embodiment 5
High-density polyethylene resin, 60 parts (density is 0.943g/cm
3, melt mass flow rate is 10g/10min, weight-average molecular weight 21.3 ten thousand, Breadth parameter of molecular weight distribution 24, ESCR>1000h, and chromium-based catalysts is produced).
High pressure polyethylene resin, 30 parts (density is 0.918g/cm
3, melt mass flow rate is 2.2g/10min).
Metallocene PE resin, 30 parts of (density 0.920g/cm
3, melt mass flow rate 1.0g/10min, Breadth parameter of molecular weight distribution 3.08, weight-average molecular weight 12.35 ten thousand, molar comonomer percentage composition is 2.53%).
Black masterbatch, 7 parts (masterbatch concentration 40%).
Oxidation inhibitor, three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester 0.72 part, β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid octadecyl ester, 0.42 part, four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.06 part.
Embodiment 6
High-density polyethylene resin, 50 parts (density is 0.943g/cm
3, melt mass flow rate is 10g/10min, weight-average molecular weight 21.3 ten thousand, Breadth parameter of molecular weight distribution 24, ESCR>1000h, and chromium-based catalysts is produced).
High pressure polyethylene resin, 20 parts (density is 0.918g/cm
3, melt mass flow rate is 2.2g/10min).
Metallocene PE resin, 10 parts of (density 0.937g/cm
3, melt mass flow rate 0.6g/10min, Breadth parameter of molecular weight distribution 3.46, weight-average molecular weight 14.6 ten thousand, molar comonomer percentage composition is 0.59%).
Black masterbatch, 5 parts (masterbatch concentration, 30%).
Oxidation inhibitor, three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester 0.09 part, four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.06 part.
Fluoroelastomer, 0.3 part.
Comparative example 1
High-density polyethylene resin, 50 parts (density is 0.945g/cm
3, melt mass flow rate is 12g/10min, weight-average molecular weight 260,000, Breadth parameter of molecular weight distribution 22, ESCR>1000h, and chromium-based catalysts is produced).
High pressure polyethylene resin, 25 parts (density is 0.919g/cm
3, melt mass flow rate is 2.0g/10min).
LLDPE, 25 parts of (density 0.920g/cm
3, melt mass flow rate is 1.0g/10min).
Black masterbatch, 4 parts (masterbatch concentration 50%).
Oxidation inhibitor, three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester 0.2 part, four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.15 part.
Comparative example 2
High-density polyethylene resin, 50 parts of (density 0.951g/cm
3, melt mass flow rate is 2.3g/10min, weight-average molecular weight 350,000, Breadth parameter of molecular weight distribution 22, ESCR100h, and chromium-based catalysts is produced).
High pressure polyethylene resin, 25 parts (density is 0.919g/cm
3, melt mass flow rate is 2.0g/10min).
LLDPE resin, 25 parts of (density 0.920g/cm
3, melt mass flow rate is 1.0g/10min).
Black masterbatch, 5 parts (masterbatch concentration 50%).
Oxidation inhibitor, three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester 0.15 part, four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.1 part.
Fluoroelastomer, 0.3 part.
Comparative example 3
High-density polyethylene resin, 50 parts of (Titanium series catalyst product, density 0.952g/cm
3, melt mass flow rate is 1.1g/10min, weight-average molecular weight 160,000, Breadth parameter of molecular weight distribution 13, ESCR50h).
High pressure polyethylene resin, 25 parts (density is 0.919g/cm
3, melt mass flow rate is 2.0g/10min).
LLDPE, 25 parts of (density 0.919g/cm
3, melt mass flow rate is 1.0g/10min).
Black masterbatch, 5 parts (masterbatch concentration 40%).
Oxidation inhibitor, three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester 0.15 part, β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid octadecyl ester, 0.15 part, four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.2 part.
The preparation method of above embodiment and comparative example: add in high-speed stirring still after above-mentioned each component is weighed in proportion, be uniformly mixed rear discharging.
Testing method
MFR: test according to GB/T3682-2000;
Density: test according to GB/T1033.2-2010;
Tensile property: according to GB/T1040.2-2006;
Bending property: according to GB/T9341-2008(mold pressing/injection moulding) sample tests;
Shock strength: test according to GB/T1843-2008;
Load deformation temperature: test according to GB/T1634.2-2004;
Hardness: test according to GB/T2411-2008;
Environmental stress cracking performance (ESCR): test according to GB/T1842-2008;
After composition mixture is even, after extruding pelletization, be pressed into sheet material and carry out physical property measurement, in table 1.
Table 1 embodiment and comparative example performance 1
Component each in composition is comprised processing aid, black masterbatch mixture evenly after, be prepared into φ 16*0.2mm drip irrigation zone through φ 75 single screw extrusion machine, processing temperature 200 ~ 300 DEG C, carries out physical property measurement, in table 2.
Table 2 embodiment and comparative example performance 2
Present composition composition can be found out except there is good intensity, snappiness, processing characteristics and ageing-resistant performance from table 1 and the embodiment of table 2 and the performance comparison of comparative example, also there is excellent wear resistance, ESCR performance, puncture resistance and the hydrostatic performance of good high temperature.
The above is only preferred embodiment of the present invention, and be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solution of the present invention content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (6)
1. a drip irrigation pipe polyethylene composition, it is characterized in that, each component and weight part thereof are: high-density polyethylene resin 40 ~ 60 parts, high pressure polyethylene resin 20 ~ 30 parts, metallocene PE resin 10 ~ 30 parts, 0.15 ~ 1.2 part, oxidation inhibitor, carbon black 1.2 ~ 3 parts;
The density of described high-density polyethylene resin is 0.940 ~ 0.950g/cm
3, melt mass flow rate (21.6kg) is 8 ~ 14g/10min, and weight-average molecular weight is 180,000 ~ 300,000;
The density of described metallocene PE resin is 0.915 ~ 0.940g/cm
3, melt mass flow rate (2.16kg) 0.5 ~ 2g/10min, Breadth parameter of molecular weight distribution 2 ~ 4, weight-average molecular weight 10 ~ 150,000, molar comonomer percentage composition is 0.5 ~ 3%;
Described high pressure polyethylene resin uses density 0.915 ~ 0.925g/cm
3, the film material of melt mass flow rate (2.16kg) 1.5 ~ 2.5g/10min.
2. a kind of drip irrigation pipe polyethylene composition according to claim 1, is characterized in that: the fluoroelastomer adding 0.3 weight part in composition.
3. a kind of drip irrigation pipe polyethylene composition according to claim 1, is characterized in that: the Breadth parameter of molecular weight distribution of described high-density polyethylene resin is 20 ~ 40.
4. a kind of drip irrigation pipe polyethylene composition according to claim 1, is characterized in that: described high-density polyethylene resin is the high-density polyethylene resin that chromium-based catalysts is produced.
5. a kind of drip irrigation pipe polyethylene composition according to claim 1, is characterized in that: described carbon black adopts master batch form to add, black masterbatch concentration 30 ~ 50%.
6. a kind of drip irrigation pipe polyethylene composition according to claim 1, it is characterized in that: described antioxidant is three ［ 2,4-di-tert-butyl-phenyl ］ phosphorous acid ester and four [β-(3,5 di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester is by weight the composition of 3:2.
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| CN104788783B (en) * | 2015-04-09 | 2017-07-04 | 吉林喜丰节水科技股份有限公司 | A kind of thin-wall high intensity internally-inlaid drip irrigation zone and its high-speed production method |
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| CN105153522A (en) * | 2015-10-16 | 2015-12-16 | 朱蕾 | Preparation method of single-labyrinth type plastic drip-irrigation belt material for agricultural water conservancy |
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