CN109181060A - A kind of HDPE solid wall pipe and preparation method thereof - Google Patents
A kind of HDPE solid wall pipe and preparation method thereof Download PDFInfo
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- CN109181060A CN109181060A CN201810892950.8A CN201810892950A CN109181060A CN 109181060 A CN109181060 A CN 109181060A CN 201810892950 A CN201810892950 A CN 201810892950A CN 109181060 A CN109181060 A CN 109181060A
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Materials For Medical Uses (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a kind of HDPE solid wall pipe and preparation method thereof, the raw material including following weight ratio: 90-100 parts of high density polyethylene (HDPE)s, 10-15 parts of maleic anhydride grafted polyethylenes, 1-2 parts of light stabilizers, 4-6 parts of heat stabilizers, 4-8 parts of silicon carbide whiskers, 0.2-4 parts of graphenes, 0.2-0.4 parts of carbon blacks, 15-18 parts of titanium dioxide and 2-4 parts of Masterbatch；By mixing, granulation, manufacture, cutting and quality inspection step, the preparation of HDPE solid wall pipe is completed；The present invention passes through silicon carbide whisker and graphene, the strength and toughness of tubing can effectively be enhanced, and the addition of carbon black and titanium dioxide can effectively realize the absorption to ultraviolet light, and have antibiotic effect, further improve the UV resistant performance and anti-microbial property of tubing；Meanwhile by using specific preparation method, and quality inspection is carried out, defective product amount can be reduced, to improve the qualification rate of product.
Description
Technical field
The invention belongs to HDPE solid wall pipe production fields, and in particular to a kind of HDPE solid wall pipe and preparation method thereof.
Background technique
Closely in half a century, with high molecular material and the development of high molecular polymerization rapid technological improvement, plastic pipe
Development and utilization are also continuously available in-depth, and production technology is also accordingly improved.Duration today, plastic conduit have been shown in practical applications
Show its brilliant performance, and in this is changed, polyethylene pipe is then by favor.
HDPE pipe refers to that with HDPE be primary raw material, is produced using processes such as extruding pipe embryo, cooling and shaping, traction, cuttings
Made of solid wall plastic pipe, this kind of tubing has that corrosion-resistant, light weight, simple installation, through-current capacity is big, the service life is long (50 years) etc.
Advantage, the tubing of alternative high energy consumption material (cement, cast iron, ceramics etc.) production, belongs to environment-friendly product.
HDPE pipe is general to be applied in municipal water supply and sewage work, sewage treatment plant and other major construction projects, in product
Mainly there is relatively high requirement in performance to the tensile strength of ring stiffness and seam.In order to reduce production cost, product is improved
The market competitiveness, manufacturer use a certain proportion of HDPE reworked material, and HDPE reworked material surface on HDPE composition of raw materials
Or inside particles contain certain moisture, cause many difficulties to production technology, it can be in tube surfaces shape if not eliminating
At water wave or recess, appearance is not only influenced, and intensity and toughness are also not being met.
Summary of the invention
The technical problem to be solved in the present invention is to provide HDPE solid wall pipes and its system that one kind can enhance intensity and toughness
Preparation Method.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is as follows: a kind of HDPE solid wall pipe, including following weight ratio
Raw material: 90-100 parts of high density polyethylene (HDPE)s, 10-15 parts of maleic anhydride grafted polyethylenes, 1-2 parts of light stabilizers, 4-6 parts of heat are steady
Determine agent, 4-8 parts of silicon carbide whiskers, 0.2-4 parts of graphenes, 0.2-0.4 parts of carbon blacks, 15-18 parts of titanium dioxide and 2-4 parts of color masterbatch
Grain.
Preferably, the raw material including following weight ratio: 95 parts of high density polyethylene (HDPE)s, 13 parts of maleic anhydride grafted polyethylenes,
1.5 parts of light stabilizers, 5 parts of heat stabilizers, 6 parts of silicon carbide whiskers, 2.1 parts of graphenes, 0.3 part of carbon black, 17 parts of titanium dioxide and 3
Part Masterbatch.
Another object of the present invention is to disclose a kind of preparation method of HDPE solid wall pipe, by mixing, granulation, manufacture,
Cutting and quality inspection step complete the preparation of HDPE solid wall pipe；Specific step is as follows:
(1) it mixes: 90-100 parts of high density polyethylene (HDPE)s, 10-15 parts of maleic anhydride grafted polyethylenes, 1-2 parts of light is stablized
Agent, 4-6 parts of heat stabilizers, 4-8 parts of silicon carbide whiskers, 0.2-4 parts of graphenes, 0.2-0.4 parts of carbon blacks, 15-18 parts of titanium dioxide
It is put into dry mixed machine together with 2-4 parts of Masterbatch to be mixed, mixture A is obtained；
(2) it is granulated: mixture A being put into shedder and is melted, extruding pelletization；
(3) it manufactures: the granulation material obtained after granulation being put into extruder and squeezes out through melting, die orifice, and is sprayed through cooling trough
Leaching cooling, obtains continous way HDPE solid wall pipe；
(4) it cuts: the continous way HDPE solid wall pipe obtained after cooling is cut as requested；
(5) the HDPE solid wall pipe after cutting: being carried out the modification and quality inspection of cut surface by quality inspection, is rejected undesirable
HDPE solid wall pipe completes the preparation of HDPE solid wall pipe.
By adopting the above technical scheme, the present invention can effectively enhance the intensity of tubing by silicon carbide whisker and graphene
Addition with toughness, and carbon black and titanium dioxide can effectively realize the absorption to ultraviolet light, and have antibiotic effect,
Further improve the UV resistant performance and anti-microbial property of tubing；Meanwhile by using specific preparation method, and carry out
Quality inspection can reduce defective product amount, to improve the qualification rate of product.
Detailed description of the invention
Fig. 1 is preparation method flow chart of the invention.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.It should be noted that for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
The each embodiment of the present invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
It is as shown in Figure 1 preparation method flow chart of the invention.
Embodiment 1
A kind of HDPE solid wall pipe, the raw material including following weight ratio: 90 parts of high density polyethylene (HDPE)s, 10 parts of maleic anhydride grafting
Polyethylene, 1 part of light stabilizer, 4 parts of heat stabilizers, 4 parts of silicon carbide whiskers, 0.2 part of graphene, 0.2 part of carbon black, 15 parts of titanium dioxides
Titanium and 2 parts of Masterbatch.
It is real to complete HDPE by mixing, granulation, manufacture, cutting and quality inspection step for a kind of preparation method of HDPE solid wall pipe
The preparation of wall pipe；Specific step is as follows:
(1) it mixes: 90 parts of high density polyethylene (HDPE)s, 10 parts of maleic anhydride grafted polyethylenes, 1 part of light stabilizer, 4 parts of heat are steady
Determine agent, 4 parts of silicon carbide whiskers, 0.2 part of graphene, 0.2 part of carbon black, 15 parts of titanium dioxide and 2 parts of Masterbatch and is put into drying together
Mixing machine is mixed, and mixture A is obtained；
(2) it is granulated: mixture A being put into shedder and is melted, extruding pelletization；
(3) it manufactures: the granulation material obtained after granulation being put into extruder and squeezes out through melting, die orifice, and is sprayed through cooling trough
Leaching cooling, obtains continous way HDPE solid wall pipe；
(4) it cuts: the continous way HDPE solid wall pipe obtained after cooling is cut as requested；
(5) the HDPE solid wall pipe after cutting: being carried out the modification and quality inspection of cut surface by quality inspection, is rejected undesirable
HDPE solid wall pipe completes the preparation of HDPE solid wall pipe.
Embodiment 2
A kind of HDPE solid wall pipe, the raw material including following weight ratio: 100 parts of high density polyethylene (HDPE)s, 15 parts of maleic anhydrides connect
Branch polyethylene, 2 parts of light stabilizers, 6 parts of heat stabilizers, 8 parts of silicon carbide whiskers, 4 parts of graphenes, 0.4 part of carbon black, 18 parts of titanium dioxides
Titanium and 4 parts of Masterbatch.
It is real to complete HDPE by mixing, granulation, manufacture, cutting and quality inspection step for a kind of preparation method of HDPE solid wall pipe
The preparation of wall pipe；Specific step is as follows:
(1) it mixes: by 100 parts of high density polyethylene (HDPE)s, 15 parts of maleic anhydride grafted polyethylenes, 2 parts of light stabilizers, 6 parts of heat
Stabilizer, 8 parts of silicon carbide whiskers, 4 parts of graphenes, 0.4 part of carbon black, 18 parts of titanium dioxide and 4 parts of Masterbatch are put into drying together
Mixing machine is mixed, and mixture A is obtained；
(2) it is granulated: mixture A being put into shedder and is melted, extruding pelletization；
(3) it manufactures: the granulation material obtained after granulation being put into extruder and squeezes out through melting, die orifice, and is sprayed through cooling trough
Leaching cooling, obtains continous way HDPE solid wall pipe；
(4) it cuts: the continous way HDPE solid wall pipe obtained after cooling is cut as requested；
(5) the HDPE solid wall pipe after cutting: being carried out the modification and quality inspection of cut surface by quality inspection, is rejected undesirable
HDPE solid wall pipe completes the preparation of HDPE solid wall pipe.
Embodiment 3
A kind of HDPE solid wall pipe, the raw material including following weight ratio: 95 parts of high density polyethylene (HDPE)s, 13 parts of maleic anhydride grafting
Polyethylene, 1.5 parts of light stabilizers, 5 parts of heat stabilizers, 6 parts of silicon carbide whiskers, 2.1 parts of graphenes, 0.3 part of carbon black, 17 parts of dioxies
Change titanium and 3 parts of Masterbatch.
It is real to complete HDPE by mixing, granulation, manufacture, cutting and quality inspection step for a kind of preparation method of HDPE solid wall pipe
The preparation of wall pipe；Specific step is as follows:
(1) it mixes: by 95 parts of high density polyethylene (HDPE)s, 13 parts of maleic anhydride grafted polyethylenes, 1.5 parts of light stabilizers, 5 parts of heat
Stabilizer, 6 parts of silicon carbide whiskers, 2.1 parts of graphenes, 0.3 part of carbon black, 17 parts of titanium dioxide and 3 parts of Masterbatch are put into dry together
Dry mixing machine is mixed, and mixture A is obtained；
(2) it is granulated: mixture A being put into shedder and is melted, extruding pelletization；
(3) it manufactures: the granulation material obtained after granulation being put into extruder and squeezes out through melting, die orifice, and is sprayed through cooling trough
Leaching cooling, obtains continous way HDPE solid wall pipe；
(4) it cuts: the continous way HDPE solid wall pipe obtained after cooling is cut as requested；
(5) the HDPE solid wall pipe after cutting: being carried out the modification and quality inspection of cut surface by quality inspection, is rejected undesirable
HDPE solid wall pipe completes the preparation of HDPE solid wall pipe.
Following experimental data is obtained through detection by the resulting HDPE solid wall pipe of above-described embodiment 1-3:
| Product qualification rate (%) | Antibiotic rate (%) | |
| Embodiment 1 | 98 | 72 |
| Embodiment 2 | 96 | 70 |
| Embodiment 3 | 98 | 74 |
It can be obtained by above-mentioned experimental data, the qualification rate and antibiotic rate of 3 resulting product of embodiment 1, embodiment 2 and embodiment
It is superior to production qualification rate, the antibiotic rate of HDPE solid wall pipe in the prior art.
The present invention can effectively enhance the strength and toughness of tubing by silicon carbide whisker and graphene, and carbon black with
The addition of titanium dioxide can effectively realize the absorption to ultraviolet light, and have antibiotic effect, further improve tubing
UV resistant performance and anti-microbial property；Meanwhile by using specific preparation method, and quality inspection is carried out, defect can be reduced
Product amount, to improve the qualification rate of product.
The addition of Masterbatch, can increase the opaqueness of tubing, to inhibit the growth of algae, also, light stabilizer
With the addition of heat stabilizer, can be avoided the generation of free radical, thus guarantee HDPE macromolecular chain not and will receive ultraviolet energy,
The inorganic matters such as infrared high-temperature energy, oxidation, the pernicious gas of Microbiological release, soil accelerate to absorb the influence of energy, thus
Long-term is placed in open air, and HDPE solid wall pipe still has complete strand, influences to improve it and resist a variety of aging actions
Ability, extend the original service life of HDPE solid wall pipe function.
In conjunction with attached drawing, the embodiments of the present invention are described in detail above, but the present invention is not limited to described implementations
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen in protection scope of the present invention.
Claims (3)
1. a kind of HDPE solid wall pipe, it is characterised in that: the raw material including following weight ratio: 90-100 parts of high density polyethylene (HDPE)s, 10-
15 parts of maleic anhydride grafted polyethylenes, 1-2 parts of light stabilizers, 4-6 parts of heat stabilizers, 4-8 parts of silicon carbide whiskers, 0.2-4 parts of stones
Black alkene, 0.2-0.4 part carbon black, 15-18 parts of titanium dioxide and 2-4 parts of Masterbatch.
2. a kind of HDPE solid wall pipe according to claim 1, it is characterised in that: the raw material including following weight ratio: 95 parts
High density polyethylene (HDPE), 13 parts of maleic anhydride grafted polyethylenes, 1.5 parts of light stabilizers, 5 parts of heat stabilizers, 6 parts of silicon carbide whiskers,
2.1 parts of graphenes, 0.3 part of carbon black, 17 parts of titanium dioxide and 3 parts of Masterbatch.
3. a kind of preparation method of HDPE solid wall pipe as described in claim 1, it is characterised in that: by mixing, be granulated, system
It makes, cut and quality inspection step, complete the preparation of HDPE solid wall pipe；Specific step is as follows:
(1) it mixes: by 90-100 parts of high density polyethylene (HDPE)s, 10-15 parts of maleic anhydride grafted polyethylenes, 1-2 parts of light stabilizers, 4-
6 parts of heat stabilizers, 4-8 parts of silicon carbide whiskers, 0.2-4 parts of graphenes, 0.2-0.4 parts of carbon blacks, 15-18 parts of titanium dioxide and 2-4
Part Masterbatch is put into dry mixed machine together and is mixed, and obtains mixture A；
(2) it is granulated: mixture A being put into shedder and is melted, extruding pelletization；
(3) it manufactures: the granulation material obtained after granulation being put into extruder and is squeezed out through melting, die orifice, and is sprayed through cooling trough cold
But, continous way HDPE solid wall pipe is obtained；
(4) it cuts: the continous way HDPE solid wall pipe obtained after cooling is cut as requested；
(5) the HDPE solid wall pipe after cutting: being carried out the modification and quality inspection of cut surface by quality inspection, and it is real to reject undesirable HDPE
Wall pipe completes the preparation of HDPE solid wall pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810892950.8A CN109181060A (en) | 2018-08-07 | 2018-08-07 | A kind of HDPE solid wall pipe and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810892950.8A CN109181060A (en) | 2018-08-07 | 2018-08-07 | A kind of HDPE solid wall pipe and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109181060A true CN109181060A (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810892950.8A Pending CN109181060A (en) | 2018-08-07 | 2018-08-07 | A kind of HDPE solid wall pipe and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110066449A (en) * | 2019-05-27 | 2019-07-30 | 江山市蓝科科技有限公司 | A kind of HDPE internal-rib reinforced pipe and preparation method thereof |
| CN110272574A (en) * | 2019-06-26 | 2019-09-24 | 南京乐洁新型材料有限公司 | A kind of production technology promoting PE solid wall pipe weatherability |
| WO2020157285A1 (en) * | 2019-01-31 | 2020-08-06 | Borealis Ag | Polyethylene composition comprising carbonaceous structures and having improved mechanical properties |
| CN117511056A (en) * | 2023-11-07 | 2024-02-06 | 贵州省纳米材料工程中心 | Polypropylene antibacterial material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840932A (en) * | 2016-05-17 | 2016-08-10 | 昆山市东部自来水管道安装有限公司 | Quick spigot-and-socket type HDPE solid-wall drainage pipe |
| CN107540916A (en) * | 2017-09-20 | 2018-01-05 | 无锡市永兴金属软管有限公司 | A kind of PE tubing for municipal drainage and preparation method thereof |
-
2018
- 2018-08-07 CN CN201810892950.8A patent/CN109181060A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840932A (en) * | 2016-05-17 | 2016-08-10 | 昆山市东部自来水管道安装有限公司 | Quick spigot-and-socket type HDPE solid-wall drainage pipe |
| CN107540916A (en) * | 2017-09-20 | 2018-01-05 | 无锡市永兴金属软管有限公司 | A kind of PE tubing for municipal drainage and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 周大纲 等: "《塑料老化与防老化技术（第二版）》", 31 October 2017, 中国轻工业出版社 * |
| 陈怡儒等: "《图解日用品安全全书》", 31 May 2015, 湖南科学技术出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020157285A1 (en) * | 2019-01-31 | 2020-08-06 | Borealis Ag | Polyethylene composition comprising carbonaceous structures and having improved mechanical properties |
| CN110066449A (en) * | 2019-05-27 | 2019-07-30 | 江山市蓝科科技有限公司 | A kind of HDPE internal-rib reinforced pipe and preparation method thereof |
| CN110272574A (en) * | 2019-06-26 | 2019-09-24 | 南京乐洁新型材料有限公司 | A kind of production technology promoting PE solid wall pipe weatherability |
| CN117511056A (en) * | 2023-11-07 | 2024-02-06 | 贵州省纳米材料工程中心 | Polypropylene antibacterial material and preparation method thereof |
| CN117511056B (en) * | 2023-11-07 | 2024-05-14 | 贵州省纳米材料工程中心 | Polypropylene antibacterial material and preparation method thereof |
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Application publication date: 20190111 |