CN1103348C - Polypropylene composition and its pipes - Google Patents
Polypropylene composition and its pipes Download PDFInfo
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- CN1103348C CN1103348C CN99119655A CN99119655A CN1103348C CN 1103348 C CN1103348 C CN 1103348C CN 99119655 A CN99119655 A CN 99119655A CN 99119655 A CN99119655 A CN 99119655A CN 1103348 C CN1103348 C CN 1103348C
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Abstract
The present invention relates to a polypropylene composition and a pipe thereof. The composition is formed by mixing polymer grade polypropylene, chemical degradation polypropylene, polypropylene and ethene / alpha-olefin copolymers according to a proper proportion and adding a proper quantity of assistants such as stabilizing agents, flow modifiers, dispersing agents, coloring agents, etc. The pipe can have a thin wall by melting and extruding the composition, the wall thickness of the pipe is from 0.1 to 10mm, and the polypropylene composition is suitable for pipes of various specifications in water saving irrigation systems.
Description
The present invention relates to a kind of polyolefin compositions, specially refer to the polypropylene of different size and performance and composition and the tubing and the machining manufacture of ethylene/alpha-olefin copolymer.
Polypropylene has good mechanical performance, thermotolerance and processing characteristics, thereby is widely used in making film, fiber, tubing, hollow piece and injection-molded item etc.Different goods have different performance requriementss to polypropylene, but the polypropylene that obtains from reactor can not satisfy the needs of product properties fully, thus have a large amount of patents and document to MODIFICATION OF POLYPROPYLENE work report.Thereby as among the patent CN 1199753A with ethylene-octene copolymer rubber and talcum powder and polypropene blended polyacrylic rigidity and the erosion-resisting characteristics of improving, said composition is applicable to goods such as injection molded automobile dashboard, door trim; Among the patent CN 1068580A with polymer grade polypropylene and the polypropene blended preparation high speed spinning of chemical degradation polypropylene dedicated material; Among the patent JP 95,210239 with fluorine-containing polymkeric substance and polypropene blended to improve polyacrylic processing characteristics and products appearance.
Polypropylene pipe is nontoxic, simultaneously good rigidly, heat resisting temperature height, be easy to connect, thereby more and more be much accounted of, be widely used in delivery, underground heating pipeline and upper and lower conduit road etc.The polypropylene pipe that is used for these fields uses under certain pressure, and used raw material is the polypropylene through modification, and it costs an arm and a leg.
At present, along with on the agricultural to the needs of water saving irrigation, a large amount of plastic pipes are used to this field.Although in CN 98124544.7 (a kind of trickle irrigation equipment) and CN 98124543.9 patents of invention such as (a kind of anti-clogging plug water-seepage irrigation method and devices), relate to the water-saving irrigation system of using polypropylene pipe, detailed elaboration do not done in the composition characteristic and the processing and manufacturing thereof of polypropylene pipe used in the water-saving irrigation system.
The objective of the invention is to develop a kind of polypropene composition by the method for blend, said composition is applicable to makes the required polypropylene pipe of agricultural water-saving irrigation system.Said composition has overcome the high shortcoming of Polypropylene for Pipes price in the past, has favorable rigidity, shock resistance and excellent processing characteristics simultaneously, can realize the thin-walled property of tubing and satisfy the performance need of water-saving irrigation system to polypropylene pipe.
The invention provides a kind of polypropene composition, said composition comprises following component and content (weight percent): polymer grade polypropylene 30-90, and chemical degradation polypropylene 9-45, polyethylene 0-5, ethylene/alpha-olefin copolymer 0.5-20, surplus is an auxiliary agent.
(Melt Flow Index MFI) (is undertaken by GB 3682-83,210 ℃, 2.16kg), is preferably 0.5-20g/10min for 0.1-50g/10min the melt flow index of polymer grade polypropylene in the present composition.It can be a homopolymer, also can be the multipolymer with ethene.In composition, the consumption of polymer grade polypropylene is 30-90%.
The chemical degradation polypropylene is meant with a small amount of chemical degradation promotor (various organo-peroxides commonly used are polyacrylic degradation of promoter) polymer grade polypropylene is carried out control degradation among the present invention, and this method can be made polypropylene the resin that melt flow index is very high, molecular weight is less, molecular weight distribution is narrower.The polyacrylic melt flow index of chemical degradation used among the present invention is 5-150g/10min, and it can be the degraded product of homo-polypropylene, also can be the degraded product of Co-polypropylene.In composition, its consumption is 9-45%.
Used polyethylene can be that density is 0.915-0.965g/cm among the present invention
3Between various polyethylene, comprise new LDPE (film grade), linear low density polyethylene, medium-density polyethylene and high density polyethylene(HDPE).In composition, its consumption is 0-5%.
Used ethylene/alpha-olefin copolymer among the present invention, alpha-olefin is meant C
5-C
20Alpha-olefin, as amylene-1, hexene-1, octene-1 or 4-methylpentene-1 etc., be preferably octene-1.Its density is 0.860-0.915g/cm
3In composition, the consumption of ethylene/alpha-olefin copolymer is 0.5-20%.
Also comprise various auxiliary agents such as stablizer, flow ability modifying agent, tinting material, dispersion agent in the polypropene composition of the present invention.For example, the Irgafos 168 of Ciba-Geigy company (three (2, the 4-di-tert-butyl-phenyl) phosphorous acid ester), Irganox 1010 (four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester), Tinuvin622 (Succinic Acid and (4-hydroxyl-2,2,6,6-tetramethyl--1-piperidines alcohol) polymkeric substance), Chimassorb 944 is (poly--{ [6-[(1,1,3, the 3-tetramethyl butyl)-imino-]-1,3,5-triazine-2,4-two bases] [2-(2,2,6, the 6-tetramethyl-piperidyl)-amino]-hexylidene-[4-(2,2,6,6-tetramethyl-piperidyl)-imino-) etc. hindered phenol or hindered amine light stabilizer and thermo-stabilizer.These stablizers can independent or compound use, and the addition in composition is the 0.01-1% of weight resin; Preferable consumption is the 0.05-0.5% of weight resin.Flow ability modifying agent is stearic acid, calcium stearate, chain alkyl fatty amide etc., and these flow ability modifying agents can independent or compound use, and addition is the 0.05-1% of weight resin.Tinting material can add with the form of toner or Masterbatch, and the present invention is preferably with carbon black or carbon black master batch.Carbon black loading is the 0-5% of weight resin, and preferable consumption is 0.5-4%.Dispersion agent is mainly used in toner or sooty disperses, and can be polyethylene wax, chlorinatedpolyethylene wax, Poly Propylene Wax etc., and the consumption of its consumption and tinting material is suitable.The interpolation total amount of various auxiliary agents is the 0.1-10% of weight resin.
The invention provides a kind of manufacture method of polypropylene pipe, soon polymer grade polypropylene 30-90 (weight percent), chemical degradation polypropylene 9-45, polyethylene 0-5, ethylene/alpha-olefin copolymer 0.5-20, auxiliary agent 0.1-10 mix in pre-mixing equipment, add melt mixing equipment (single screw extrusion machine, twin screw extruder, double roll mill etc.) then and mix, this composition is made the thin-wall pipes that wall thickness is 0.1-10mm through extrusion moulding.The temperature of fusion apparatus is 160-230 ℃, and the extrusion moulding temperature is 180-260 ℃.This composition tubing is applicable to agricultural water-saving irrigation system. comprise slight irrigation tubing such as low-pressure delivery pipe, drip irrigation and infiltrating irrigation.
Polypropylene pipe of the present invention has good physicals and use properties.Specifically, the present invention relates to a kind of polypropene composition that comprises more amount polymer grade polypropylene and chemical degradation polypropylene, less weight northylen, ethylene/alpha-olefin copolymer and comprise auxiliary agents such as stablizer, flow ability modifying agent, tinting material, dispersion agent, said composition has good physical properties and extrudes processibility, by said composition being extruded continuously the thin-wall pipes of manufacturing, have isostatic rigidity and shock resistance, good anti ageing property and long work-ing life.This tubing can satisfy the performance requriements of water-saving irrigation system to tubing, is applicable to all size of agricultural water-saving irrigation system and the pipeline of purposes.
Context of the present invention can pass through the further additional explanation of the following example, but can not think that the present invention only only limits to these embodiment.
In the following embodiments, carbon removal infrablack, other auxiliary agent and consumption are three (2, the 4-di-tert-butyl-phenyl) phosphorous acid ester) 0.1%, four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester 0.1%, poly--{ [6-[(1,1,3, the 3-tetramethyl butyl)-imino-]-1,3,5-triazines-2,4-two bases] [2-(2,2,6, the 6-tetramethyl-piperidyl)-amino]-hexylidene-[4-(2,2,6, the 6-tetramethyl-piperidyl)-and imino-} 0.2%, stearic acid 0.3%, polyethylene wax 0.5%.
Embodiment 1
Take by weighing polymer grade polypropylene (MFI is 0.5g/10min) 8kg, chemical degradation polypropylene (MFI is 80g/10min) 1kg, (density is 0.863g/cm to ethylene/octene-1 multipolymer
3) 1kg, carbon black 0.2kg and various auxiliary agent place high-speed mixer to mix, then (barrel temperature is 160-260 ℃ in 160-260 ℃ on pipe extruder, the former temperature is 250 ℃) temperature under carry out tubing and extrude, the gained pipe diameter is 200mm, tube wall thickness is 10mm.
Embodiment 2
Take by weighing polymer grade polypropylene (MFI is 1.0g/10min) 5kg, chemical degradation polypropylene (MFI is 145g/10min) 3kg, (density is 0.935g/cm to polyethylene
3) 0.4kg, (density is 0.885g/cm to ethylene/octene-1 multipolymer
3) 1kg, carbon black 0.2kg and various auxiliary agent place high-speed mixer to mix, then (barrel temperature is 160-260 ℃ in 160-260 ℃ on pipe extruder, the former temperature is 250 ℃) temperature under carry out tubing and extrude, the gained pipe diameter is 10mm, tube wall thickness is 0.12mm.
Embodiment 3
Take by weighing polymer grade polypropylene (MFI is 18g/10min) 7kg, chemical degradation polypropylene (MFI is 46g/10min) 1kg, (density is 0.924g/cm to polyethylene
3) 0.4kg, (density is 0.863g/cm to ethylene/octene-1 multipolymer
3) 1kg, carbon black 0.2kg and various auxiliary agent place high-speed mixer to mix, on SLF-35B type twin screw extruder, under 140-220 ℃ temperature (barrel temperature is 140-220 ℃, and head temperature is 215 ℃), carry out melt blending, extruding pelletization then.After the pellet oven dry, extrude carrying out tubing on the pipe extruder group under 180-250 ℃ temperature, the gained pipe diameter is 100mm, and wall thickness is 4mm, smooth in appearance.Comparative Examples
Taking by weighing polypropylene (MFI is 18g/10min) 4kg, carbon black 160g and various auxiliary agent places high-speed mixer to mix, extrude carrying out tubing on the pipe extruder group under 180-260 ℃ temperature then, can not extrude diameter smoothly is that 10mm, wall thickness are the tubing of 0.12mm.
Claims (5)
1, a kind of polypropene composition is characterized in that described composition comprises following component and content (weight percent):
Polymer grade polypropylene 30-90,
Chemical degradation polypropylene 9-45,
Polyethylene 0-5,
Ethylene/alpha-olefin copolymer 0.5-20,
Surplus is an auxiliary agent,
The melt flow index of above-mentioned polymer grade polypropylene is 0.1-50g/10min,
The polyacrylic melt flow index of above-mentioned chemical degradation is 5-150g/10min,
Above-mentioned poly density is 0.915-0.965g/cm
3,
The density of above-mentioned ethylene/alpha-olefin copolymer is 0.860-0.915g/cm
3
2, a kind of polypropene composition according to claim 1, the melt flow index that it is characterized in that described polymer grade polypropylene is 0.2-20g/10min.
3, a kind of polypropene composition according to claim 1 is characterized in that the alpha-olefin in the described ethylene/alpha-olefin copolymer is amylene-1, hexene-1, octene-1 or 4-methylpentene-1.
4, a kind of polypropylene pipe, it is characterized in that polymer grade polypropylene 30-90 (weight percent), chemical degradation polypropylene 9-45, polyethylene 0-5, ethylene/alpha-olefin copolymer 0.5-20 and appropriate amount of addition agent are put into material pre-mixing equipment, mix, form mixture; The mixture that forms is put into forcing machine, under 160-230 ℃ temperature condition, make the material melting mixing even; The uniform material of melting mixing is extruded at 180-260 ℃ through former, and cooling and shaping makes.
5, polypropylene pipe according to claim 4 is characterized in that described tube wall thickness is 0.1-10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99119655A CN1103348C (en) | 1999-09-24 | 1999-09-24 | Polypropylene composition and its pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99119655A CN1103348C (en) | 1999-09-24 | 1999-09-24 | Polypropylene composition and its pipes |
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| Publication Number | Publication Date |
|---|---|
| CN1247207A CN1247207A (en) | 2000-03-15 |
| CN1103348C true CN1103348C (en) | 2003-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99119655A Expired - Fee Related CN1103348C (en) | 1999-09-24 | 1999-09-24 | Polypropylene composition and its pipes |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338053B (en) * | 2008-08-12 | 2011-02-16 | 苏州工业园区华通科技有限公司 | Polyolefine core tube and method for preparing same |
| CN104109285A (en) * | 2014-07-12 | 2014-10-22 | 宁国市东兴实业有限公司 | Modified polypropylene (PP) spray irrigation tube |
| CN105385034A (en) * | 2015-12-15 | 2016-03-09 | 吴振宇 | Polypropylene composition and pipe prepared from polypropylene composition |
| CN107118440A (en) * | 2017-06-12 | 2017-09-01 | 安徽国登管业科技有限公司 | Polypropylene-polyethylene multiple tube and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037183A (en) * | 1988-04-19 | 1989-11-15 | 四川农业大学 | The sulfate process black liquid is handled in Chemical Decomposition |
| JPH08259774A (en) * | 1995-03-23 | 1996-10-08 | Sumitomo Chem Co Ltd | Polypropylene-based resin composition and foam sheet |
| CN1151419A (en) * | 1995-11-24 | 1997-06-11 | 中国科学院化学研究所 | Polypropylene resin composition, preparation method and uses thereof |
| EP0826728A2 (en) * | 1996-09-02 | 1998-03-04 | Basf Aktiengesellschaft | Impact-modified propylene polymers with reduced stress-whitening |
| CN1181308A (en) * | 1997-03-25 | 1998-05-13 | 河南鹏源塑料制品有限公司 | Prodn. tech. and equipment for producing water pipe for microporous infiltrating irrigation and drip irrigation |
-
1999
- 1999-09-24 CN CN99119655A patent/CN1103348C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037183A (en) * | 1988-04-19 | 1989-11-15 | 四川农业大学 | The sulfate process black liquid is handled in Chemical Decomposition |
| JPH08259774A (en) * | 1995-03-23 | 1996-10-08 | Sumitomo Chem Co Ltd | Polypropylene-based resin composition and foam sheet |
| CN1151419A (en) * | 1995-11-24 | 1997-06-11 | 中国科学院化学研究所 | Polypropylene resin composition, preparation method and uses thereof |
| EP0826728A2 (en) * | 1996-09-02 | 1998-03-04 | Basf Aktiengesellschaft | Impact-modified propylene polymers with reduced stress-whitening |
| CN1181308A (en) * | 1997-03-25 | 1998-05-13 | 河南鹏源塑料制品有限公司 | Prodn. tech. and equipment for producing water pipe for microporous infiltrating irrigation and drip irrigation |
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| CN1247207A (en) | 2000-03-15 |
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