CN106589543A - Ultra-high molecular weight polyethylene alloy tube and preparation method thereof - Google Patents
Ultra-high molecular weight polyethylene alloy tube and preparation method thereof Download PDFInfo
- Publication number
- CN106589543A CN106589543A CN201611121106.2A CN201611121106A CN106589543A CN 106589543 A CN106589543 A CN 106589543A CN 201611121106 A CN201611121106 A CN 201611121106A CN 106589543 A CN106589543 A CN 106589543A
- Authority
- CN
- China
- Prior art keywords
- molecular weight
- high molecular
- weight polyethylene
- ultra
- ultra high
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three 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
- C08L2207/068—Ultra high molecular weight polyethylene
Abstract
The invention provides an ultra-high molecular weight polyethylene alloy tube and a preparation method thereof. The tube comprises an alloy tube body and polyethylene composite layers composited on the inner wall and the outer wall of the alloy tube body; each polyethylene composite layer is prepared from, by weight, 40-95 parts of ultra-high molecular weight polyethylene, 3-50 parts of a macromolecule reinforced rheological agent, 2-10 parts of compatilizer, 0.1-2.5 parts of an antioxidant and 0.2-5 parts of additives. According to the ultra-high molecular weight polyethylene alloy tube and the preparation method thereof, the melting viscosity of processing can be reduced, the processing fluidity is improved, tube extrusion molding is prone to occurrence, the tube property is improved, the machine head resistance generated when processing is conducted is reduced, and the production efficiency is improved. More tubes are extruded every hour, the electric energy consumption is less, and the effects of saving energy and reducing consumption are achieved.
Description
Technical field
The present invention relates to alloy composite pipe material production field, and in particular to a kind of ultra high molecular weight polyethylene alloy tubing and
Its preparation method.
Background technology
Ultra-high molecular weight polyethylene（UHMW-PE）It is a kind of thermoplastic engineering plastic of excellent combination property.Because it has
Outstanding wearability, excellent resistance to impact, fabulous chemical resistance is sound-deadening properties, and lower temperature resistance and lubricity are good, friction
The low advantage of coefficient, so being widely used in preparing tubing conveying gas, liquid（Petroleum crude oil）And the mixed liquor containing solid（Ore deposit
Slag, flyash, coal etc.）, resistance is little in course of conveying, non-scaling, energy consumption is saved, by a large number in electric power, waterpower, rivers lake
Apply in the fields such as extra large dredging governance, grain processing, chemical industry, oil, coal, ore dressing.
But because ultra-high molecular weight polyethylene adds, man-hour melt viscosity is high, and processing fluidity is very poor, it is difficult to extrusion molding
Tubing.It is domestic at present to be made using the addition low molecule paraffin in ultra-high molecular weight polyethylene mostly in order to increase processing fluidity
For rheological agent, to reduce adding the melt viscosity in man-hour, carry out producing low side tubing.Because paraffin molecule amount is low, cause after addition super
To reducing after High molecular weight polyethylene mean molecule quantity declines, thus mechanical properties of tubular goods declines, also, low molecule paraffin is added
Processing melt viscosity is limited, therefore, head pressure is very big during processing, low production efficiency, and extruded velocity is slow, and power consumption is big.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of ultra high molecular weight polyethylene alloy tubing and preparation method thereof,
Can reduce processing melt viscosity, improve processing fluidity, easy extrusion molding tubing, while improving pipe performance, reduce
Head resistance during processing, improve production efficiency.Make that extruding pipe material per hour is more, power consumption is few, reaches energy conservation and consumption reduction effects.
The present invention is as follows for the adopted technical scheme that solves the above problems：
Technical scheme one：
A kind of ultra high molecular weight polyethylene alloy tubing, including alloy pipe body and to be compound in the alloy pipe sheet external
Polyethylene composite bed on wall；The raw material of the polyethylene composite bed includes the component of following weight portion：
40 ~ 95 parts of ultra-high molecular weight polyethylene
Macromolecule strengthens 3 ~ 50 parts of rheological agent
2 ~ 10 parts of compatilizer
0.1 ~ 2.5 part of antioxidant
0.2 ~ 5 part of additive
Further, the ultra-high molecular weight polyethylene molecular weight described in it is 200 ~ 9,000,000.
Further, it is homemade poly- para hydroxybenzene formyl p-phthalic acid second that the high molecular described in it strengthens rheological agent
Diol ester.
Further, the compatilizer is hydrocarbon acids compatilizer, it is preferred that the compatilizer connects for maleic anhydride
Skill polyethylene.
Further, the antioxidant described in it is phenolic antioxidant, it is preferred that the antioxidant is B215 phenol
Kind antioxidant.
Further, the additive described in it is calcium stearate.
Technical scheme two：
A kind of preparation method of ultra high molecular weight polyethylene alloy tubing, it is characterised in that it comprises the steps：
（1）The macromolecule of the ultra-high molecular weight polyethylene of 40 ~ 95 weight portions, 3 ~ 50 weight portions is strengthened into rheological agent, 2 ~ 10 weight
The additive mix homogeneously of the compatilizer, the antioxidant of 0.1 ~ 2.5 weight portion and 0.2 ~ 5 weight portion of part；
（2）Said mixture is dried 4 ~ 8 hours at 100 ~ 120 DEG C；
（3）By above-mentioned dried raw material mix homogeneously under high velocity agitation；
（4）By extruder extruding pipe material, wherein processing temperature is the just material of mix homogeneously：120-180 DEG C of feeding section, pressure
Contracting section：220-280 DEG C, 230-300 DEG C of homogenizing zone exports 180-240 DEG C.
Further, described extruder is conical double screw extruder.
The present invention has the following technical effect that：
When the present invention prepares high-performance ultra high molecular weight polyethylene alloy tubing, the rheological agent of addition is that macromolecule strengthens rheology
Agent, the ultrahigh molecular weight polyethylene tubing than being prepared with common low molecule paraffin rheological agent is compared with superiority following prominent
Energy：
（1）Because the macromolecule for adding strengthens rheological agent-poly- para hydroxybenzene formyl ethylene glycol terephthalate and supra polymer
Weight northylen forms in process network structure, so as to improve the mechanical property of tubing.Its tensile strength reaches 28-
32MPa, and the tensile strength of the common ultrahigh molecular weight polyethylene tubing prepared by common paraffin rheological agent is only 21-25MPa.
（2）The anti-wear performance of tubing is greatly improved：Under the conditions of same test, ultra high molecular weight polyethylene alloy tubing mill
Loss rate is 0.1-0.2%, and common ultrahigh molecular weight polyethylene tubing wear rate is up to 1-2%.
（3）Because super high molecular weight strengthens the poly- para hydroxybenzene formyl ethylene glycol terephthalate melt viscosity of rheological agent very
It is low, thus during with super-high molecular weight polythene blending extruding pipe material, melt viscosity is also decreased, processing fluidity is good, extrusion
Speed is fast, and production efficiency is high.As a example by extrude Φ 64*3.5mm tubing, ultra high molecular weight polyethylene alloy pipe extruded velocity is about
120m/h, and common ultra high molecular weight polyethylene alloy tube extrusion speed is only 6-7m/h
（4）Ultra high molecular weight polyethylene alloy pipe course of processing head extrusion pressure is not higher than 10MPa, than common super high molecular weight
Polyethylene tube head extrusion pressure is that 33MPa is low, shows that the present invention prepares ultra high molecular weight polyethylene alloy Manifold technology tool
There is obvious effect of energy.
（5）Common ultrahigh molecular weight polyethylene tubing operating temperature is no more than 80 DEG C, and compo pipe of the present invention
Material can be used at 100 DEG C, therefore range of application is more extensive.Below in conjunction with specific embodiment to the present invention further specifically
It is bright.
The present invention can reduce processing melt viscosity, improve processing fluidity, easy extrusion molding tubing, while making tubing
Performance is improved, and reduces head resistance during processing, improve production efficiency.Make that extruding pipe material per hour is more, power consumption is few, reaches section
Can be lowered consumption effect.
Specific embodiment
Below in conjunction with specific embodiment, the present invention will be described in further detail.
Embodiment 1：
A kind of ultra high molecular weight polyethylene alloy tubing, its preparation method comprises the steps：
（1）By the weight portion of ultra-high molecular weight polyethylene 40, poly- para hydroxybenzene formyl p-phthalic acid second two that molecular weight is 8,000,000
The weight portion of alcohol ester 35, the weight portion of maleic anhydride grafted polyethylene 6, the weight portion of B215 phenolic antioxidants 1 and the weight of calcium stearate 4
Part mix homogeneously；
（2）Said mixture is dried 8 hours at 100 ~ 120 DEG C；
（3）By above-mentioned dried raw material mix homogeneously under high velocity agitation；
（4）By extruder extruding pipe material, wherein processing temperature is the just material of mix homogeneously：120-180 DEG C of feeding section, pressure
Contracting section：220-280 DEG C, 230-300 DEG C of homogenizing zone exports 180-240 DEG C；Head extrusion pressure 10MPa.
Described extruder is conical double screw extruder.
Embodiment 2：
A kind of ultra high molecular weight polyethylene alloy tubing, its preparation method comprises the steps：
（1）By the weight portion of ultra-high molecular weight polyethylene 72, poly- para hydroxybenzene formyl p-phthalic acid second two that molecular weight is 8,000,000
The weight portion of alcohol ester 50, the weight portion of maleic anhydride grafted polyethylene 10, the weight portion of B215 phenolic antioxidants 2 and the weight of calcium stearate 5
Amount part mix homogeneously；
（2）Said mixture is dried 8 hours at 100 ~ 120 DEG C；
（3）By above-mentioned dried raw material mix homogeneously under high velocity agitation；
（4）By extruder extruding pipe material, wherein processing temperature is the just material of mix homogeneously：120-180 DEG C of feeding section, pressure
Contracting section：220-280 DEG C, 230-300 DEG C of homogenizing zone exports 180-240 DEG C；Head extrusion pressure 9.8MPa.
Described extruder is conical double screw extruder.
Embodiment 3：
A kind of ultra high molecular weight polyethylene alloy tubing, its preparation method comprises the steps：
（1）By the weight portion of ultra-high molecular weight polyethylene 95, poly- para hydroxybenzene formyl p-phthalic acid second two that molecular weight is 8,000,000
The weight portion of alcohol ester 50, the weight portion of maleic anhydride grafted polyethylene 10, the weight portion of B215 phenolic antioxidants 2.5 and calcium stearate 5
Weight portion mix homogeneously；
（2）Said mixture is dried 8 hours at 100 ~ 120 DEG C；
（3）By above-mentioned dried raw material mix homogeneously under high velocity agitation；
（4）By extruder extruding pipe material, wherein processing temperature is the just material of mix homogeneously：120-180 DEG C of feeding section, pressure
Contracting section：220-280 DEG C, 230-300 DEG C of homogenizing zone exports 180-240 DEG C；Head extrusion pressure 9.7MPa.
Described extruder is conical double screw extruder.
Embodiment 4：
A kind of ultra high molecular weight polyethylene alloy tubing, its preparation method comprises the steps：
（1）By the weight portion of ultra-high molecular weight polyethylene 50, poly- para hydroxybenzene formyl p-phthalic acid second two that molecular weight is 8,000,000
The weight portion of alcohol ester 20, the weight portion of maleic anhydride grafted polyethylene 3, the weight portion of B215 phenolic antioxidants 0.1 and calcium stearate 0.2
Weight portion mix homogeneously；
（2）Said mixture is dried 8 hours at 100 ~ 120 DEG C；
（3）By above-mentioned dried raw material mix homogeneously under high velocity agitation；
（4）By extruder extruding pipe material, wherein processing temperature is the just material of mix homogeneously：120-180 DEG C of feeding section, pressure
Contracting section：220-280 DEG C, 230-300 DEG C of homogenizing zone exports 180-240 DEG C；Head extrusion pressure 9.2MPa.
Described extruder is conical double screw extruder.
Comparative example
Comparative example is the common ultrahigh molecular weight polyethylene tubing with low molecule paraffin as rheological agent, and other components are with embodiment 1.
Pipe performance test result described in embodiment 1-4 and comparative example is shown in Table 1（It is to extrude Φ 64*3.5mm tubing
Example）.
The Comparative result table of table 1
Tensile strength testing standard GB1039-79.
Frictional behaviour is tested：Equipment M-200 friction wear testing machines, load 20kg.
Fraction time：3h, temperature：Room temperature, to grinding part：Steel wheel（45#Steel）Diameter 40mm.
Experimental condition：Dry grinding.
To in the preparation process and comparative example of poly- para hydroxybenzene formyl ethylene glycol terephthalate with low molecule paraffin
Production method for the common ultrahigh molecular weight polyethylene tubing of rheological agent is those of ordinary skill in the art and should generally obtain
The common knowledge known, will not be described here.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (10)
1. a kind of ultra high molecular weight polyethylene alloy tubing, it is characterised in that：Raw material includes the component of following weight portion：
40 ~ 95 parts of ultra-high molecular weight polyethylene
Macromolecule strengthens 3 ~ 50 parts of rheological agent
2 ~ 10 parts of compatilizer
0.1 ~ 2.5 part of antioxidant
0.2 ~ 5 part of additive.
2. a kind of ultra high molecular weight polyethylene alloy tubing according to claim 1, it is characterised in that the high score described in it
It is poly- para hydroxybenzene formyl ethylene glycol terephthalate that son amount strengthens rheological agent.
3. a kind of ultra high molecular weight polyethylene alloy tubing according to claim 1, it is characterised in that the superelevation described in it
The molecular weight of molecular weight polyethylene is 200 ~ 9,000,000.
4. a kind of ultra high molecular weight polyethylene alloy tubing according to claim 1, it is characterised in that：It is compatible described in it
Agent is hydrocarbon acids compatilizer.
5. a kind of ultra high molecular weight polyethylene alloy tubing according to claim 4, it is characterised in that：Described compatilizer
For maleic anhydride grafted polyethylene.
6. a kind of ultra high molecular weight polyethylene alloy tubing according to claim 1, it is characterised in that：Antioxygen described in it
Agent is phenolic antioxidant.
7. a kind of ultra high molecular weight polyethylene alloy tubing according to claim 6, it is characterised in that：Described antioxidant
For B215 phenolic antioxidants.
8. a kind of ultra high molecular weight polyethylene alloy tubing according to claim 1, it is characterised in that：Addition described in it
Agent is calcium stearate.
9. a kind of preparation method of ultra high molecular weight polyethylene alloy tubing as claimed in claim 1, it is characterised in that its bag
Include following steps：
（1）The macromolecule of the ultra-high molecular weight polyethylene of 40 ~ 95 weight portions, 3 ~ 50 weight portions is strengthened into rheological agent, 2 ~ 10 weight
The additive mix homogeneously of the compatilizer, the antioxidant of 0.1 ~ 2.5 weight portion and 0.2 ~ 5 weight portion of part；
（2）Said mixture is dried 4 ~ 8 hours at 100 ~ 120 DEG C；
（3）Above-mentioned dried raw material is uniformly mixed in mixing plant, rotating speed>200r/min；
（4）By extruder extruding pipe material, wherein processing temperature is the just material of mix homogeneously：120-180 DEG C of feeding section, pressure
Contracting section：220-280 DEG C, 230-300 DEG C of homogenizing zone exports 180-240 DEG C.
10. the preparation method of a kind of ultra high molecular weight polyethylene alloy tubing according to claim 9, it is characterised in that：
Described extruder is conical double screw extruder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121106.2A CN106589543A (en) | 2016-12-08 | 2016-12-08 | Ultra-high molecular weight polyethylene alloy tube and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121106.2A CN106589543A (en) | 2016-12-08 | 2016-12-08 | Ultra-high molecular weight polyethylene alloy tube and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106589543A true CN106589543A (en) | 2017-04-26 |
Family
ID=58597397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611121106.2A Pending CN106589543A (en) | 2016-12-08 | 2016-12-08 | Ultra-high molecular weight polyethylene alloy tube and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106589543A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111154164A (en) * | 2020-01-14 | 2020-05-15 | 中国石油大学(北京) | Preparation method of ultrahigh molecular weight polyethylene composite material and product thereof |
| CN113121902A (en) * | 2021-03-23 | 2021-07-16 | 江西铜业股份有限公司 | Rapid-forming ultrahigh molecular weight polyethylene pipe and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432939A (en) * | 2011-11-07 | 2012-05-02 | 中国蓝星（集团）股份有限公司 | Antistatic flame-retardant ultra high molecular weight polyethylene composition and preparation method thereof |
| CN102477180A (en) * | 2010-11-25 | 2012-05-30 | 新疆天业（集团）有限公司 | Linear low-density polyethylene composition |
| CN102911425A (en) * | 2012-11-21 | 2013-02-06 | 上海化工研究院 | Special material for extrusion-grade ultra-high molecular weight polyethylene pipe with high melt fluidity and preparation method thereof |
-
2016
- 2016-12-08 CN CN201611121106.2A patent/CN106589543A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477180A (en) * | 2010-11-25 | 2012-05-30 | 新疆天业（集团）有限公司 | Linear low-density polyethylene composition |
| CN102432939A (en) * | 2011-11-07 | 2012-05-02 | 中国蓝星（集团）股份有限公司 | Antistatic flame-retardant ultra high molecular weight polyethylene composition and preparation method thereof |
| CN102911425A (en) * | 2012-11-21 | 2013-02-06 | 上海化工研究院 | Special material for extrusion-grade ultra-high molecular weight polyethylene pipe with high melt fluidity and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111154164A (en) * | 2020-01-14 | 2020-05-15 | 中国石油大学(北京) | Preparation method of ultrahigh molecular weight polyethylene composite material and product thereof |
| CN111154164B (en) * | 2020-01-14 | 2022-02-08 | 中国石油大学(北京) | Preparation method of ultrahigh molecular weight polyethylene composite material and product thereof |
| CN113121902A (en) * | 2021-03-23 | 2021-07-16 | 江西铜业股份有限公司 | Rapid-forming ultrahigh molecular weight polyethylene pipe and preparation method thereof |
| CN113121902B (en) * | 2021-03-23 | 2022-11-22 | 江西铜业股份有限公司 | Rapid forming ultra-high molecular weight polyethylene pipe and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103756088B (en) | The polyvinyl piping materials of high intensity heat-resistant, wear-resistant | |
| CN104045901B (en) | The processing method of ultra-high molecular weight polyvinyl composite and production said composition tubing | |
| CN104004257B (en) | Modified with ultrahigh molecular weight polyethylene Antiwear composite pipe material and preparation method thereof | |
| CN103304934B (en) | PVC drain pipe material and preparation method thereof | |
| CN102850857B (en) | Steel pipeline anticorrosive material and preparation method of steel pipeline anticorrosive material | |
| CN102911454B (en) | PVC (polyvinyl chloride)/ABS (acrylonitrile butadiene styrene copolymer)/CPE (chlorinated polyethylene) pipe with high impact resistance and method for preparing same | |
| CN111019209B (en) | Ultra-high molecular weight polyethylene composition for preparing liner tube and preparation method thereof | |
| CN101358008A (en) | Preparation method of special material for buried polyethylene drainage pipe | |
| CN101851419B (en) | Matte polyimide/ acrylonitrile-butadiene-phenylethylene alloy resin composition and preparation method thereof | |
| CN108774349A (en) | A kind of UHMWPE melting extrusions level composite material and preparation method thereof, moulding process and application | |
| CN109280271B (en) | Heat-insulating wear-resistant polypropylene composite material pipeline for oil pipe lining and manufacturing method thereof | |
| CN105153531A (en) | High-temperature-resistant PE (polyethylene) corrugated pipe filling master batch and preparation method thereof | |
| CN107254087A (en) | One kind enhancing composite polyethylene binary wall twisting and pipe and preparation method thereof | |
| CN104017265A (en) | Ultra-high molecular weight polyethylene composite tube | |
| CN107057154A (en) | Wear resistant polyethylene composite pipe | |
| CN106589543A (en) | Ultra-high molecular weight polyethylene alloy tube and preparation method thereof | |
| CN110938268B (en) | High-wear-resistance PVC-C composite pipe and preparation method thereof | |
| CN111117031A (en) | Polyethylene composite material for modified pipe with high impact resistance, good toughness, weather resistance and aging resistance and preparation method thereof | |
| CN103571182A (en) | High-fluidity toughened filling nylon and preparation method thereof | |
| CN105778355A (en) | Low-density anti-impact modified polyvinyl chloride pipe and production process thereof | |
| CN112980076A (en) | Graphene wear-resistant PE composite material for carrier roller and preparation method thereof | |
| CN112961419A (en) | Flame-retardant wear-resistant high-density polyethylene composite material for carrier roller and preparation method thereof | |
| CN111040307A (en) | Polypropylene corrugated pipe composite material and preparation method of composite polypropylene corrugated pipe | |
| CN1156527C (en) | Ultra-high molecular weight polyethylene three-component blend and its preparation method | |
| CN111410788B (en) | Modified polypropylene material for cable communication sleeve and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170426 |
|
| RJ01 | Rejection of invention patent application after publication |