CN104371168B - A kind of enhancing HDPE double-wall corrugated pipe and preparation method thereof - Google Patents
A kind of enhancing HDPE double-wall corrugated pipe and preparation method thereof Download PDFInfo
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- CN104371168B CN104371168B CN201410615411.1A CN201410615411A CN104371168B CN 104371168 B CN104371168 B CN 104371168B CN 201410615411 A CN201410615411 A CN 201410615411A CN 104371168 B CN104371168 B CN 104371168B
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/133—Rigid pipes of plastics with or without reinforcement the walls consisting of two layers
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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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- 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
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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
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to a kind of enhancing HDPE double-wall corrugated pipe and preparation method thereof, the formula of described enhancing HDPE double-wall corrugated pipe is made up of the raw material of following weight parts: high density polyethylene (HDPE) 100 parts, wood powder 40～60 parts, titanate coupling agent 1～3 parts, ethylene-vinyl acetate copolymer 7～9 parts, wherein, and the mesh number of described wood powder is 80～110 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is 35～45%, and melt index is 0.7～1.5g/10min；The enhancing HDPE double-wall corrugated pipe that the present invention prepares has preferable low-temperature impact toughness, good rigidly, ring stiffness is high, creep resisting ability is excellent, has relatively low cost simultaneously, has broad application prospects.
Description
Technical field
The present invention relates to plastic pipe technical field, be specifically related to a kind of enhancing HDPE double-wall corrugated pipe and preparation side thereof
Method.
Background technology
Along with the rapid growth that Chinese national economy is continual and steady, provide good macroscopic view for cities and towns infrastructure construction
Environment and broad space.Along with China is for the pay attention to day by day of environmental conservation, governments at all levels of both the central and local governments have put into effect one and have been
Row water saving, the policies and regulations of pollution treatment protection environment.Supply water, water saving, draining and waste water control will become urban municipal construction from now on
Emphasis, this is that the popularization and application of heavy-caliber plastic pipe provide market development space.Due to structured wall popes can with conservation,
Reducing cost, therefore structured wall popes has become as the main product of heavy caliber draining blow-off line.China is used for draining and blowdown
The U-PVC double-wall corrugated pipe of pipeline has good rigidity, the advantages such as price is low；But the shortcoming also having low temperature impact properties difference, especially
Breakage it is very easy to when north of china in winter is constructed.And HDPE double-wall corrugated pipe has obvious advantage in low-temperature flexibility, but due to
PE material behavior, its rigidity relatively pipe of cement is poor, and the ring stiffness of tubing and creep resisting ability relatively PVC corrugated tube is poor, at life-time service
During, easily by gravity deformation, affect product service life.
Prior art seldom relates to have low-temperature flexibility, rigidity, ring stiffness and creep resisting ability simultaneously the most preferable
Strengthen HDPE double-wall corrugated pipe；Therefore, exploitation one strengthens HDPE double-wall corrugated pipe, has great significance.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of enhancing HDPE double-wall corrugated pipe and preparation thereof
Method, this enhancing HDPE double-wall corrugated pipe has preferable low-temperature impact toughness, good rigidly, ring stiffness is high, creep resisting ability is excellent
Different, there is relatively low cost simultaneously, have broad application prospects.
It is an object of the invention to be achieved by following technical solution:
A kind of enhancing HDPE double-wall corrugated pipe, the formula of described HDPE double-wall corrugated pipe is by the raw material group of following weight parts
Become:
High density polyethylene (HDPE) 100 parts；
Wood powder 40～60 parts；
Titanate coupling agent 1～3 parts；
Ethylene-vinyl acetate copolymer 7～9 parts；
Wherein, the mesh number of described wood powder is 80～110 mesh；Vinylacetate in described ethylene-vinyl acetate copolymer contains
Amount is 35～45%, and melt index is 0.7～1.5g/10min；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Two-stage assembled pulse air-flow is i.e. used to be dried described wood powder employing dedicated drying production line, detailed process
For: dry 1～3 hour at 120～180 DEG C so that it is moisture is less than 300mg/kg, mix with titanate coupling agent after being cooled to room temperature
Close, be heated to 60～70 DEG C, dispersed with stirring 5～7 minutes under 800～1100 revs/min of speed, it is subsequently adding ethylene-vinyl acetate
Copolymer, cools down after stirring automatically；Then above-mentioned compound is mixed homogeneously with high density polyethylene (HDPE), be then sent to squeeze
Going out machine, plasticizing extrusion, mould molding i.e. obtain enhancing HDPE double-wall corrugated pipe.
In the present invention, have that yield is big but baking temperature can not be the highest, baking temperature mistake owing to wood powder is dried
Height is the most on fire, uses traditional drying equipment to be difficult to meet the big requirement produced.Therefore the wood powder in the present invention is dried employing
Special drying production line, i.e. uses two-stage assembled pulse pneumatic conveying drying.When dry, wet wood powder is entered continuously by feeder
Enter in the drying tube of first order pulsed pneumatic dryer lower end.In drying tube, wood powder is broken up by high velocity, hot air and upwards moves
Dynamic, material contacts fully with air-flow, and moisture is by rapid evaporation.Wood powder by after drying tube by cyclone collection, then enter
Enter second level pulsed pneumatic dryer, be again dried, effectively extend the drying time of material and achieve well
Effect.
Inventor finds in experimentation, and the mesh number of wood powder is to the low-temperature flexibility of tubing, rigidity, ring stiffness and anti-compacted
Become capacity bigger；Wood mesh is less, and surface roughness is high, short texture, owing to high density polyethylene (HDPE) is nonpolar, and
Wood powder is polarity, both poor compatibility, and high density polyethylene (HDPE) melt is difficult in wood powder infiltration, easily forms sky around wood powder
Hole defect；And when wood mesh is excessive, wood powder particle diameter is little, easily reuniting, these defects form stress and concentrate, in less effect
Under, be easily broken off, and the wood powder of 80～110 mesh, moderate in grain size, good with the high density polyethylene (HDPE) compatibility, now impact strength and
Bending strength is best.
It is further preferred that the mesh number of described wood powder is 100 mesh.
Preferably, described high density polyethylene (HDPE) is polyethylene PN049.
Inventor in experiments it is found that, when vinyl acetate content is relatively low, tubing rigidity becomes big, resisting environmental stress and cracking
Property rise, wearability rises, but it is elastic and flexibility declines；And when vinyl acetate content is higher, the elasticity of tubing and
Flexibility is improved, but tubing rigidity is deteriorated, and environmental stress crack resistance, anti-wear performance reduce.It addition, inventor finds
When melt index increases, tubular object extruding performance is good, and it is smooth that outward appearance is glossy, but intensity is relatively low；When melt index reduces, then
The resistance to impact of tubing and stress cracking performance improve.Through Integrated comparative, determine described ethylene-vinyl acetate copolymer (EVA)
In vinyl acetate content be 35～45%, melt index is 0.7～1.5 g/10min；It is further preferred that described acetic acid
Vinyl acetate content is 48%, and melt index is 0.7g/10min.
Compared with prior art, there is advantages that the HDPE double-wall corrugated pipe that the present invention prepares
In low-temperature flexibility, not only there is obvious advantage, simultaneously by regulating the content of EVA in formula and selecting specific vinylacetate
The EVA of content and melt index, and the good rigidly of HDPE double-wall corrugated pipe for preparing of the selection etc. of wood mesh, ring are firm
Degree is high, creep resisting ability is strong, during life-time service, because of gravity deformation, thus will not extend the service life of product；Simultaneously
Production cost is low, has broad application prospects.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.These embodiments are only that the typical case to the present invention retouches
State, but the invention is not restricted to this.Test method used in following embodiment if no special instructions, is conventional method, is made
Raw material, reagent etc., if no special instructions, be the raw material and reagent that can obtain from commercial sources such as conventional markets.
Embodiment 1
A kind of enhancing HDPE double-wall corrugated pipe, the formula of described HDPE double-wall corrugated pipe is by the raw material group of following weight parts
Become:
Polyethylene PN049 100 parts；
Wood powder 40 parts；
Titanate coupling agent 1 part；
Ethylene-vinyl acetate copolymer 7 parts；
Wherein, the mesh number of described wood powder is 100 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is
40%, melt index is 0.7g/10min；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Dedicated drying production line is used to dry 1 hour at 120 DEG C described wood powder so that it is moisture is less than 300mg/kg, cold
But mixing with titanate coupling agent to room temperature, be heated to 60 DEG C, under 800 revs/min of speed, dispersed with stirring 5 minutes, then add
Enter ethylene-vinyl acetate copolymer, automatically cool down after stirring；Then above-mentioned compound is mixed all with polyethylene PN049
Even, it is then sent to extruder, plasticizing extrusion, mould molding i.e. obtain enhancing HDPE double-wall corrugated pipe.
Embodiment 2
A kind of enhancing HDPE double-wall corrugated pipe, the formula of described HDPE double-wall corrugated pipe is by the raw material group of following weight parts
Become:
Polyethylene PN049 100 parts；
Wood powder 50 parts；
Titanate coupling agent 2 parts；
Ethylene-vinyl acetate copolymer 8 parts；
Wherein, the mesh number of described wood powder is 80 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is
35%, melt index is 1.0g/10min；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Dedicated drying production line is used to dry 2 hours at 160 DEG C described wood powder so that it is moisture is less than 300mg/kg, cold
But mix with titanate coupling agent to room temperature, be heated to 650 DEG C, dispersed with stirring 6 minutes under 1000 revs/min of speed, then
Add ethylene-vinyl acetate copolymer, automatically cool down after stirring；Then above-mentioned compound is mixed all with polyethylene PN049
Even, it is then sent to extruder, plasticizing extrusion, mould molding i.e. obtain enhancing HDPE double-wall corrugated pipe.
Embodiment 3
A kind of enhancing HDPE double-wall corrugated pipe, the formula of described HDPE double-wall corrugated pipe is by the raw material group of following weight parts
Become:
Polyethylene PN049 100 parts；
Wood powder 60 parts；
Titanate coupling agent 3 parts；
Ethylene-vinyl acetate copolymer 9 parts；
Wherein, the mesh number of described wood powder is 110 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is
45%, melt index is 1.5g/10min；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Dedicated drying production line is used to dry 3 hours at 180 DEG C described wood powder so that it is moisture is less than 300mg/kg, cold
But mixing with titanate coupling agent to room temperature, be heated to 70 DEG C, under 1100 revs/min of speed, dispersed with stirring 7 minutes, then add
Enter ethylene-vinyl acetate copolymer, automatically cool down after stirring；Then above-mentioned compound is mixed all with polyethylene PN049
Even, it is then sent to extruder, plasticizing extrusion, mould molding i.e. obtain enhancing HDPE double-wall corrugated pipe.
Reference examples 1
A kind of enhancing HDPE double-wall corrugated pipe, the formula of described HDPE double-wall corrugated pipe is by the raw material group of following weight parts
Become:
Polyethylene PN049 100 parts；
Wood powder 20 parts；
Titanate coupling agent 1 part；
Ethylene-vinyl acetate copolymer 7 parts；
Wherein, the mesh number of described wood powder is 100 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is
40%, melt index is 0.7g/10min；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Dedicated drying production line is used to dry 1 hour at 120 DEG C described wood powder so that it is moisture is less than 300mg/kg, cold
But mixing with titanate coupling agent to room temperature, be heated to 60 DEG C, under 800 revs/min of speed, dispersed with stirring 5 minutes, then add
Enter ethylene-vinyl acetate copolymer, automatically cool down after stirring；Then above-mentioned compound is mixed all with polyethylene PN049
Even, it is then sent to extruder, plasticizing extrusion, mould molding i.e. obtain enhancing HDPE double-wall corrugated pipe.
Reference examples 2
A kind of enhancing HDPE double-wall corrugated pipe, the formula of described HDPE double-wall corrugated pipe is by the raw material group of following weight parts
Become:
Polyethylene PN049 100 parts；
Wood powder 40 parts；
Titanate coupling agent 1 part；
Ethylene-vinyl acetate copolymer 7 parts；
Wherein, the mesh number of described wood powder is 20 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is
40%, melt index is 0.7g/10min；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Dedicated drying production line is used to dry 1 hour at 120 DEG C described wood powder so that it is moisture is less than 300mg/kg, cold
But mixing with titanate coupling agent to room temperature, be heated to 60 DEG C, under 800 revs/min of speed, dispersed with stirring 5 minutes, then add
Enter ethylene-vinyl acetate copolymer, automatically cool down after stirring；Then above-mentioned compound is mixed all with polyethylene PN049
Even, it is then sent to extruder, plasticizing extrusion, mould molding i.e. obtain enhancing HDPE double-wall corrugated pipe.
Reference examples 3
A kind of enhancing HDPE double-wall corrugated pipe, the formula of described HDPE double-wall corrugated pipe is by the raw material group of following weight parts
Become:
Polyethylene PN049 100 parts；
Wood powder 40 parts；
Titanate coupling agent 1 part；
Ethylene-vinyl acetate copolymer 7 parts；
Wherein, the mesh number of described wood powder is 300 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is
40%, melt index is 0.7g/10min；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Dedicated drying production line is used to dry 1 hour at 120 DEG C described wood powder so that it is moisture is less than 300mg/kg, cold
But mixing with titanate coupling agent to room temperature, be heated to 60 DEG C, under 800 revs/min of speed, dispersed with stirring 5 minutes, then add
Enter ethylene-vinyl acetate copolymer, automatically cool down after stirring；Then above-mentioned compound is mixed all with polyethylene PN049
Even, it is then sent to extruder, plasticizing extrusion, mould molding i.e. obtain enhancing HDPE double-wall corrugated pipe.
Reference examples 4
A kind of enhancing HDPE double-wall corrugated pipe, the formula of described HDPE double-wall corrugated pipe is by the raw material group of following weight parts
Become:
Polyethylene PN049 100 parts；
Wood powder 40 parts；
Titanate coupling agent 1 part；
Ethylene-vinyl acetate copolymer 7 parts；
Wherein, the mesh number of described wood powder is 100 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is
20%, melt index is 0.5g/10min；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Dedicated drying production line is used to dry 1 hour at 120 DEG C described wood powder so that it is moisture is less than 300mg/kg, cold
But mixing with titanate coupling agent to room temperature, be heated to 60 DEG C, under 800 revs/min of speed, dispersed with stirring 5 minutes, then add
Enter ethylene-vinyl acetate copolymer, automatically cool down after stirring；Then above-mentioned compound is mixed all with polyethylene PN049
Even, it is then sent to extruder, plasticizing extrusion, mould molding i.e. obtain enhancing HDPE double-wall corrugated pipe.
Reference examples 5
A kind of enhancing HDPE double-wall corrugated pipe, the formula of described HDPE double-wall corrugated pipe is by the raw material group of following weight parts
Become:
Polyethylene PN049 100 parts；
Wood powder 40 parts；
Titanate coupling agent 1 part；
Ethylene-vinyl acetate copolymer 7 parts；
Wherein, the mesh number of described wood powder is 100 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is
55%, melt index is 2.5g/10min；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Dedicated drying production line is used to dry 1 hour at 120 DEG C described wood powder so that it is moisture is less than 300mg/kg, cold
But mixing with titanate coupling agent to room temperature, be heated to 60 DEG C, under 800 revs/min of speed, dispersed with stirring 5 minutes, then add
Enter ethylene-vinyl acetate copolymer, automatically cool down after stirring；Then above-mentioned compound is mixed all with polyethylene PN049
Even, it is then sent to extruder, plasticizing extrusion, mould molding i.e. obtain enhancing HDPE double-wall corrugated pipe.
Reference examples 6
A kind of enhancing HDPE double-wall corrugated pipe, the formula of described HDPE double-wall corrugated pipe is by the raw material group of following weight parts
Become:
Polyethylene PN049 100 parts；
Wood powder 40 parts；
Titanate coupling agent 1 part；
Ethylene-vinyl acetate copolymer 7 parts；
Wherein, the mesh number of described wood powder is 100 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is
40%, melt index is 0.7g/10min；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Described wood powder uses dedicated drying production line to dry 1 hour at 120 DEG C so that it is moisture is less than 300mg/kg, cooling
Stir with polyethylene PN049 with titanate coupling agent, ethylene-vinyl acetate copolymer to room temperature, be then sent to extrusion
Machine, plasticizing extrusion, mould molding i.e. obtain product.
Embodiment 1～3 and reference examples 1～6 preparation obtained by the performance of enhancing HDPE double-wall corrugated pipe as shown in table 1
As shown in Table 1, the present invention is by selecting high density polyethylene (HDPE), wood powder, titanate coupling agent, ethylene-vinyl acetate common
Four kinds of components of polymers and regulate the enhancing HDPE double-wall corrugated pipe that the content of each component prepares with raw material and not only have
Good low-temperature impact toughness, simultaneously by the HDPE double-wall corrugated pipe that makes the restriction of VA content in EVA to prepare
Good rigidly, ring stiffness are high, creep resisting ability is strong, during life-time service, because of gravity deformation, thus will not extend making of product
Use the life-span；Production cost is low simultaneously, has broad application prospects.By contrast, the tubing that each reference examples prepares firm
Property, ring stiffness and creep resisting ability all notable not as good as the present invention.
Claims (3)
1. one kind strengthens HDPE double-wall corrugated pipe, it is characterised in that the formula of described HDPE double-wall corrugated pipe is by following weight parts
Raw material composition:
Wherein, the mesh number of described wood powder is 80～110 mesh；Vinyl acetate content in described ethylene-vinyl acetate copolymer is
35～45%, melt index is 0.7～1.5g/10min；Described high density polyethylene (HDPE) is polyethylene PN049；
The preparation method of described HDPE double-wall corrugated pipe comprises the steps:
Described wood powder is used two-stage assembled pulse pneumatic conveying drying, dries 1～3 hour at 120～180 DEG C so that it is moisture is less than
300mg/kg, mixes with titanate coupling agent after being cooled to room temperature, is heated to 60～70 DEG C, under 800～1100 revs/min of speed
Dispersed with stirring 5～7 minutes, be subsequently adding ethylene-vinyl acetate copolymer, automatically cool down after stirring；Then by above-mentioned mixing
Material is mixed homogeneously with high density polyethylene (HDPE), is then sent to extruder, and plasticizing extrusion, mould molding i.e. obtain enhancing HDPE double-walled ripple
Stricture of vagina pipe.
Enhancing HDPE double-wall corrugated pipe the most according to claim 1, it is characterised in that the mesh number of described wood powder is 100 mesh.
Enhancing HDPE double-wall corrugated pipe the most according to claim 1, it is characterised in that described ethylene-vinyl acetate copolymer
In vinyl acetate content be 42%, melt index is 0.7g/10min.
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| CN201410615411.1A CN104371168B (en) | 2014-11-05 | 2014-11-05 | A kind of enhancing HDPE double-wall corrugated pipe and preparation method thereof |
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| CN201410615411.1A CN104371168B (en) | 2014-11-05 | 2014-11-05 | A kind of enhancing HDPE double-wall corrugated pipe and preparation method thereof |
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| CN104371168B true CN104371168B (en) | 2016-08-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106947142A (en) * | 2017-04-09 | 2017-07-14 | 贵州枫叶管业有限公司 | A kind of enhanced HDPE double-wall corrugated pipes and preparation method thereof |
| CN108794853A (en) * | 2018-05-18 | 2018-11-13 | 田秋珍 | A kind of preparation method of flame retardant flexible heat-shrinkable T bush |
| CN112266520A (en) * | 2020-10-29 | 2021-01-26 | 安徽杰蓝特新材料有限公司 | Organic rigid reinforced toughened alloy winding structure wall pipe for buried pipe and preparation method thereof |
| CN113308014A (en) * | 2021-06-07 | 2021-08-27 | 安徽杰蓝特新材料有限公司 | Double-wall corrugated pipe with good flame retardance and preparation method thereof |
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| CN104371168A (en) | 2015-02-25 |
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