CN111471228A - High-density polyethylene drain pipe for trenchless laying and preparation method thereof - Google Patents
High-density polyethylene drain pipe for trenchless laying and preparation method thereof Download PDFInfo
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- 229920001903 high density polyethylene Polymers 0.000 title claims abstract description 48
- 239000004700 high-density polyethylene Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 30
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 30
- 239000004014 plasticizer Substances 0.000 claims abstract description 19
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 18
- 239000004610 Internal Lubricant Substances 0.000 claims abstract description 16
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 16
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000004595 color masterbatch Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 9
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 239000004698 Polyethylene Substances 0.000 claims description 23
- 229920000573 polyethylene Polymers 0.000 claims description 23
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 10
- -1 polyethylene Polymers 0.000 claims description 10
- 239000012778 molding material Substances 0.000 claims description 7
- 239000004611 light stabiliser Substances 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 239000004709 Chlorinated polyethylene Substances 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 150000004982 aromatic amines Chemical class 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229940124543 ultraviolet light absorber Drugs 0.000 claims description 2
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 3
- 238000007666 vacuum forming Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 23
- 238000005336 cracking Methods 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- IKEHOXWJQXIQAG-UHFFFAOYSA-N 2-tert-butyl-4-methylphenol Chemical compound CC1=CC=C(O)C(C(C)(C)C)=C1 IKEHOXWJQXIQAG-UHFFFAOYSA-N 0.000 description 3
- 239000003490 Thiodipropionic acid Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 235000019303 thiodipropionic acid Nutrition 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004605 External Lubricant Substances 0.000 description 1
- 241000196171 Hydrodictyon reticulatum Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000003898 horticulture Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007539 photo-oxidation reaction Methods 0.000 description 1
- 239000004597 plastic additive Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B11/00—Drainage of soil, e.g. for agricultural purposes
- E02B11/005—Drainage conduits
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- C—CHEMISTRY; METALLURGY
- 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
-
- 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
- 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
-
- 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
-
- 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
- C08L2207/20—Recycled plastic
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Agronomy & Crop Science (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a high-density polyethylene drain pipe for trenchless paving and a preparation method thereof, wherein the formula comprises the following raw material components in parts by weight: high-density polyethylene, linear low-density polyethylene, reclaimed materials, crystal whiskers, a plasticizer, an antioxidant, color master batches, an anti-aging agent and an internal lubricant. The preparation method comprises the following steps: mixing high-density polyethylene, low-density polyethylene, an antioxidant and an internal lubricant, and stirring at a high speed for 30-40 min at the temperature of 160-180 ℃; and adding the reclaimed materials, the whiskers, the plasticizer, the anti-aging agent and the color master batch, stirring at a high speed for 20-30min at 200-220 ℃, extruding, vacuum forming, spraying codes, cutting, inspecting, packaging and warehousing. The high-density polyethylene pipe prepared by the invention has the advantages of better ring stiffness, tensile strength and elongation at break.
Description
Technical Field
The invention relates to the technical field of PE pipe production and preparation, in particular to a high-density polyethylene drain pipe for trenchless laying and a preparation method thereof.
Background
The high-density polyethylene drain pipe is also called HDPE drain pipe, and is a general name of a thermoplastic plastic circular pipe without internal pressure effect, which is mainly made of high-density polyethylene resin and is manufactured by adopting an extrusion molding process. The HDPE drain pipe is a replacement product of the traditional steel pipe and polyvinyl chloride drain pipe, mainly undertakes the drainage tasks of rainwater, sewage, farmland irrigation and drainage, and is widely applied to the drainage fields of highways, railway roadbeds, subway engineering, waste landfill sites, tunnels, greenbelts, playgrounds, side slope protection caused by high water content and the like, and underground irrigation and drainage systems of agriculture and horticulture.
With the continuous development of world economy, the population number is rapidly increased, the process of urbanization is continuously accelerated, the design capacity and the operation capacity of the original pipeline cannot meet the requirements, and the pipeline needs to be continuously built, reconstructed and repaired. If the construction of digging greatly excessively, will cause the traffic jam, the afforestation gardens are destroyed, still sometimes because the existence of river course, water net, railway, airport and building, bring many restrictions for the construction, can increase the construction cost greatly even to there is construction quality hidden danger.
In order to solve the above problems, a trenchless construction technique for underground pipeline construction is currently developed, where trenchless laying refers to a construction method of laying and replacing pipelines under the condition of surface micro-excavation or non-excavation (generally excavation in a small range at the starting point and the end point of a pipeline section) by using rock-soil drilling means such as guiding or directional drilling, pipe expansion (cracking) technology and the like. However, the problem that the high-density polyethylene for trenchless laying in the market is fragile, easy to break and poor in impact toughness is common, so that the pipe is difficult to meet the requirements of bending and bending when a pipeline is laid, and the difficulty in installation and construction is increased.
Disclosure of Invention
The invention aims to provide a high-density polyethylene drain pipe for trenchless laying, which has high ring stiffness and high ring flexibility, and the invention aims to provide a preparation method of the high-density polyethylene drain pipe for trenchless laying.
The invention is realized by the following technical scheme:
the high-density polyethylene drain pipe for trenchless laying comprises the following raw material components in parts by weight:
by adopting the technical scheme, the high-density polyethylene has good heat resistance, cold resistance, hardness, rigidity and chemical stability, but the high-density polyethylene has poor aging resistance and environmental cracking resistance which are inferior to those of low-density polyethylene. Linear low density polyethylene has higher tensile strength, penetration resistance, tear resistance and elongation at break, and is particularly suitable for film making.
The linear low-density polyethylene is added into the high-density polyethylene, the defects of the high-density polyethylene in the aspects of environmental cracking resistance and tensile property can be made up by utilizing the characteristics of the linear low-density polyethylene, so that the prepared high-density polyethylene pipe has better flexibility, the tensile strength and the elongation at break of the pipe are greatly improved, the pipe is ensured to have good ring stiffness and ring flexibility, the curve requirement of the pipe at the bending position in the laying process is met, and the installation and use performance of the pipe is better.
The whisker is micro-nano short fiber grown from high-purity single crystal, has high strength, high modulus and high elongation, and is a reinforcing material in raw materials for producing pipes. And the plasticizer is used for reducing the brittleness of the pipe and increasing the toughness of the pipe, so that the flexibility of the pipe is further improved on the basis of the linear low-density polyethylene. Because the environmental cracking resistance of the high-density polyethylene is further reduced under the action of thermal oxidation, an antioxidant and an anti-aging agent are required to be added to reduce the thermal oxidation of the high-density polyethylene, and the internal lubricant is used for reducing the internal friction force among polymer molecular chains in each component, improving the fluidity of the polymer, enabling the reaction among the polymers to be more sufficient, and improving the texture uniformity and the surface finish of the pipe.
Further setting the following steps: the plasticizer is chlorinated polyethylene.
By adopting the technical scheme, the polyvinyl chloride has good weather resistance, ozone resistance, chemical resistance and aging resistance, good oil resistance, flame retardance and colorability, still has good toughness at the temperature of minus 30 ℃, can enhance the flexibility of the pipe, can resist the sewage erosion in a drain pipe and prolongs the service life of the pipe.
Further setting the following steps: the antioxidant comprises at least one of aromatic amine antioxidant, hindered phenol antioxidant and auxiliary antioxidant.
Further setting the following steps: the anti-aging agent comprises an ultraviolet light absorber UV-531 and a light stabilizer 744 in a weight ratio of 1: 1.
By adopting the technical scheme, the light stabilizer 744 is a hindered light stabilizer, almost has no ultraviolet absorption capability, but can effectively capture active free radicals generated by a high polymer material under the action of ultraviolet rays, thereby exerting the light stabilization effect, and having particularly remarkable effect when being used in polyolefin; and the ultraviolet absorbent UV-531 has good compatibility with polyethylene resin and low volatility. The light stabilizer 744 and the ultraviolet absorbent UV-531 mutually cooperate to inhibit the generation of active free radicals of the high polymer material under the action of ultraviolet rays and absorb the ultraviolet rays in time, so that the anti-aging performance of the pipe is better.
Further setting the following steps: the internal lubricant adopts polyethylene wax.
By adopting the technical scheme, the polyethylene wax has good cold resistance, heat resistance, chemical resistance and wear resistance, and has good compatibility with resins of polyethylene, and compared with other external lubricants, the polyethylene wax has stronger internal lubricating effect, thereby further improving the gloss and the processing performance of the pipe.
Further setting the following steps: the color master batch adopts carbon black master batch.
Through adopting above-mentioned technical scheme, the carbon black mother except can coloring to tubular product, and the carbon black is owing to have higher light absorption, can effectually prevent that plastics from receiving ultraviolet irradiation and producing the photooxidation degradation, consequently still has good anti ultraviolet ageing effect to improve the ageing resistance of tubular product.
Further setting the following steps: the whisker is a silicon carbide whisker.
By adopting the technical scheme, the silicon carbide whisker has excellent mechanical property, heat resistance, durability, corrosion resistance and high-temperature oxidation resistance, and has good compatibility with a matrix material, so that the silicon carbide whisker can be used as a good reinforcing and toughening agent for plastic pipelines.
A preparation method of a high-density polyethylene drain pipe for trenchless laying comprises the following steps:
(1) weighing high-density polyethylene, low-density polyethylene, reclaimed materials, whiskers, a plasticizer, an antioxidant, color master batches, an anti-aging agent and an internal lubricant according to the respective parts by weight, mixing the weighed high-density polyethylene, low-density polyethylene, antioxidant and internal lubricant, and stirring at a high speed for 30-40 min at the temperature of 160-180 ℃ to form master batches;
(2) adding weighed reclaimed materials, whiskers, a plasticizer, an anti-aging agent and color master batches into the master batch obtained in the step (1), and continuously stirring at a high speed for 20-30min at the temperature of 200-220 ℃ to form a molding material;
(3) and (3) adding the molding material obtained in the step (2) into an integrated extruder to perform extrusion vacuum shaping, code spraying, cutting, inspection, packaging and warehousing.
By adopting the technical scheme, the weighed high-density polyethylene, low-density polyethylene, antioxidant and internal lubricant are mixed in the step (1), so that molecular chains have better fluidity under the action of the internal lubricant, the mixing and contact among the molecular chains are more sufficient, meanwhile, the antioxidant inhibits the thermal oxidation of the polymer molecular chains, and the component stability of the master batch is improved; adding plastic auxiliaries with low contents such as reclaimed materials, whiskers, plasticizers, anti-aging agents and color master batches into the master batch obtained in the step (1), mixing the auxiliaries with the uniformly mixed master batch, uniformly distributing the auxiliaries in the master batch, and improving the mechanical strength, ring stiffness, ring flexibility, tensile strength, elongation at break, ageing resistance and other properties of the pipe; and (3) extruding and molding the molding material obtained in the step (2) to form a final pipe product meeting the use requirement.
In conclusion, the beneficial technical effects of the invention are as follows:
(1) the linear low-density polyethylene is added into the high-density polyethylene, the defects of the high-density polyethylene in the aspects of environmental cracking resistance and tensile property are made up by using the characteristics of the linear low-density polyethylene, and the flexibility, tensile strength and elongation at break of the pipe are greatly improved, so that the pipe is ensured to have good ring stiffness and ring flexibility, and the installation and use performance of the pipe is better;
(2) the plasticizer, the antioxidant, the internal lubricant and the crystal whisker are added into the formula, so that the mechanical strength, the flexibility, the oxidation resistance and the anti-aging capability of the pipe are further improved, and various performance indexes of the pipe are further improved.
Detailed Description
The following is a further detailed description with reference to examples 1 to 5, comparative examples 6 to 10 and comparative examples 11 to 15.
Table 1 shows the content of each component in examples 1 to 5 of the present invention;
table 2 shows the content of each component in comparative examples 1 to 5;
table 3 shows the content of each component in comparative examples 6 to 10;
table 4 shows the content of each component in comparative examples 11 to 15;
table 5 shows the results of the ring stiffness, tensile strength and elongation at break tests of the PE pipes of examples 1 to 5, comparative examples 6 to 10 and comparative examples 11 to 15 in the present invention.
Examples 1 to 5: a high-density polyethylene drainage pipe for trenchless laying comprises the following raw material components as shown in Table 1:
table 1 examples 1-5 table of contents of each component
Wherein, the plasticizer adopts chlorinated polyethylene, the antioxidant in the embodiment 1 and the antioxidant in the embodiment 2 adopts diphenylamine in aromatic amine antioxidant, the antioxidant in the embodiment 3 and the antioxidant in the embodiment 4 adopt a mixture of 2, 6-tertiary butyl-4-methylphenol in hindered phenol antioxidant and thiodipropionic acid diester in auxiliary antioxidant, and the mixing weight ratio of the 2, 6-tertiary butyl-4-methylphenol to the thiodipropionic acid diester is 1: 1. The antioxidant used in example 5 was a mixture of diphenylamine, 2, 6-tert-butyl-4-methylphenol and thiodipropionic acid diester in a weight ratio of 1:1: 1. The anti-aging agent is prepared by mixing an ultraviolet absorbent UV-531 and a light stabilizer 744 in a weight ratio of 1: 1. The internal lubricant adopts polyethylene wax, and the color master batch adopts carbon black master batch.
The preparation method of the high-density polyethylene drain pipe for trenchless laying comprises the following steps:
(1) weighing high-density polyethylene, low-density polyethylene, reclaimed materials, whiskers, a plasticizer, an antioxidant, color master batches, an anti-aging agent and an internal lubricant according to the respective parts by weight, mixing the weighed high-density polyethylene, low-density polyethylene, antioxidant and internal lubricant, and stirring at a high speed for 30-40 min at the temperature of 160-180 ℃ to form master batches;
(2) adding weighed reclaimed materials, whiskers, a plasticizer, an anti-aging agent and color master batches into the master batch obtained in the step (1), and continuously stirring at a high speed for 20-30min at the temperature of 200-220 ℃ to form a molding material;
(3) and (3) adding the molding material obtained in the step (2) into an integrated extruder to perform extrusion vacuum shaping, code spraying, cutting, inspection, packaging and warehousing.
Comparative examples 1 to 5: comparative examples 1, 2, 3, 4, 5 differ from example 2 in the content of linear low density polyethylene. The component contents of each proportion are shown in table 2:
TABLE 2 content table of each component of comparative examples 1 to 5
Comparative examples 6 to 10: comparative examples 6, 7, 8, 9, 10 differ from example 3 in the plasticizer content. The component contents of each proportion are shown in table 3:
TABLE 3 content table for each component of comparative examples 5 to 10
Comparative examples 11 to 15: comparative examples 11, 12, 13, 14, 15 differ from example 3 in the content of whiskers. The component contents of each proportion are shown in table 4:
TABLE 4 TABLE FOR COMPARATIVE EXAMPLES 11-15, the contents of each component
And (3) testing the ring stiffness, tensile strength and elongation at break of the PE pipe.
The ring stiffness, tensile strength and elongation at break of the pipes of examples 1 to 5, comparative examples 6 to 10 and comparative examples 11 to 15 were measured with reference to the test method in "Polyethylene (PE) pipes for trenchless excavation (Q/GTGY 003-2006)" standard. When the standard is established, reference is made to relevant standards and regulations of developed countries such as the United states and Europe on PE pipes for trenchless construction. The measurement results are shown in table 5:
TABLE 5 results of measurements of Ring stiffness, tensile Strength and elongation at Break of PE pipes in examples 1 to 5, comparative examples 6 to 10 and comparative examples 11 to 15
Comparing examples 1 to 5, it can be seen from table 1 and table 5 that as the content of the high density polyethylene increases and the content of the linear low density polyethylene decreases, the loop stiffness of the obtained PE pipe gradually increases, and the tensile strength and the elongation at break increase first and then decrease. In view of the test data of examples 1, 2, 3, 4 and 5, the ring stiffness, tensile strength and elongation at break of the PE pipe in example 3 are all maintained at a high level and the balance of the performance indexes is good, and the weight ratio between the high density polyethylene and the linear low density polyethylene is close to 2:1, so it can be concluded that the performance of the PE pipe obtained is the best when the weight ratio between the high density polyethylene and the linear low density polyethylene is 2: 1.
Comparing comparative examples 1-5 with example 2, and combining tables 2 and 5, it can be seen that when the linear low density polyethylene is present in an amount outside the range of 8-14 parts by weight, the resulting PE pipe has good ring stiffness but poor tensile strength and elongation at break properties. From this, it is found that the presence or absence of the linear low density polyethylene has a significant influence on the tensile strength and elongation at break of the PE pipe.
Comparing comparative examples 6-10 with example 3, and combining tables 3 and 5, it can be seen that the plasticizer has a positive effect on the tensile strength and elongation at break of the PE pipe, and as the content of the plasticizer increases, the tensile strength and elongation at break of the resulting PE pipe increase, and the ring stiffness does not change much.
Comparing comparative examples 11-15 with example 3, and combining tables 4 and 5, it can be seen that the whiskers have a positive effect on the ring stiffness, tensile strength and elongation at break of the PE pipe, and are a relatively comprehensive plastic reinforcement.
The implementation principle and the beneficial effects of the embodiment are as follows: the characteristics of linear low-density polyethylene are utilized to make up the defects of high-density polyethylene in the aspects of environmental cracking resistance and tensile property, so that the prepared high-density polyethylene pipe has better flexibility, the tensile strength and the elongation at break of the pipe are greatly improved, the pipe is ensured to have good ring rigidity and ring flexibility, the curve requirement of the pipe at the bending part in the laying process is met, and the installation and use performance of the pipe is better. And the plasticizer, the antioxidant, the anti-aging agent, the whisker and other plastic additives are added to assist the linear low-density polyethylene to improve the flexibility and the anti-aging performance of the PE pipe, and prolong the service life of the PE pipe.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The high-density polyethylene drain pipe for trenchless laying is characterized by comprising the following raw material components in parts by weight:
16-24 parts of high-density polyethylene;
8-14 parts of linear low-density polyethylene;
2.2-3.2 parts of a reclaimed material;
1.2-2.2 parts of whisker;
1.0-1.5 parts of a plasticizer;
0.8-1.2 parts of antioxidant;
0.7-1.2 parts of color master batch;
0.2-0.3 part of anti-aging agent;
0.1-0.2 part of internal lubricant.
2. The high-density polyethylene drain pipe for trenchless laying as claimed in claim 1, wherein: the plasticizer is chlorinated polyethylene.
3. The high-density polyethylene drain pipe for trenchless laying as claimed in claim 1, wherein: the antioxidant comprises at least one of aromatic amine antioxidant, hindered phenol antioxidant and auxiliary antioxidant.
4. The high-density polyethylene drain pipe for trenchless laying as claimed in claim 1, wherein: the anti-aging agent comprises an ultraviolet light absorber UV-531 and a light stabilizer 744 in a weight ratio of 1: 1.
5. The high-density polyethylene drain pipe for trenchless laying as claimed in claim 1, wherein: the internal lubricant adopts polyethylene wax.
6. The high-density polyethylene drain pipe for trenchless laying as claimed in claim 1, wherein: the color master batch adopts carbon black master batch.
7. The high-density polyethylene drain pipe for trenchless laying as claimed in claim 1, wherein: the whisker is a silicon carbide whisker.
8. A method of making a high density polyethylene drain for trenchless construction as claimed in any of claims 1 to 7 comprising the steps of:
(1) weighing high-density polyethylene, low-density polyethylene, reclaimed materials, whiskers, a plasticizer, an antioxidant, color master batches, an anti-aging agent and an internal lubricant according to the respective parts by weight, mixing the weighed high-density polyethylene, low-density polyethylene, antioxidant and internal lubricant, and stirring at a high speed for 30-40 min at the temperature of 160-180 ℃ to form master batches;
(2) adding weighed reclaimed materials, whiskers, a plasticizer, an anti-aging agent and color master batches into the master batch obtained in the step (1), and stirring at a high speed for 20-30min at the temperature of 200-220 ℃ to form a molding material;
(3) and (3) extruding the molding material obtained in the step (2), carrying out vacuum shaping, spraying codes, cutting, inspecting, packaging and warehousing.
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| CN201910069801.6A CN111471228A (en) | 2019-01-24 | 2019-01-24 | High-density polyethylene drain pipe for trenchless laying and preparation method thereof |
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| CN201910069801.6A CN111471228A (en) | 2019-01-24 | 2019-01-24 | High-density polyethylene drain pipe for trenchless laying and preparation method thereof |
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| CN111471228A true CN111471228A (en) | 2020-07-31 |
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