CN105906926A - High-strength polyethylene tube for communication and preparation method thereof - Google Patents
High-strength polyethylene tube for communication and preparation method thereof Download PDFInfo
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- CN105906926A CN105906926A CN201610527382.2A CN201610527382A CN105906926A CN 105906926 A CN105906926 A CN 105906926A CN 201610527382 A CN201610527382 A CN 201610527382A CN 105906926 A CN105906926 A CN 105906926A
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
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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
- 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
-
- 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)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a high-strength polyethylene tube for communication, wherein a component A comprises 100 parts of high-density polyethylene, 0.5-3.0 parts of silane and 0.05-0.15 part of dicumyl peroxide; a component B comprises 100 parts of high-density polyethylene and 0.02-1 part of dibutyltin dilaurate; and an additive component C comprises 0.5-1.5 parts of antioxidant and 0.6-0.8 part of benzophenone ultraviolet absorbent. The formula of the polyethylene tube for communication is improved by a mode of silane cross-linked with polyethylene, the strength of the tube is improved, and the tube has the advantages of rigid texture, better toughness and better environmental resistance.
Description
Technical field
The present invention relates to the tubing field that communicates, especially high density polyethylene (HDPE) communication tubing, be specifically related to a kind of based on height
High-strength polyethylene communication tubing that density polyethylene is modified and preparation method thereof.
Background technology
PE tubing is except one of the most frequently used tubing of PVC, and PE tubing has superior corrosion resistance, good strong
Degree, can bear certain adaptability to changes, service life is long, its have lightweight, be easily installed, there is good pliability, resistance to
The advantages such as low temperature, apply in various fields.
But, existing frequently-used PE tubing there is also some defects: intensity is relatively low, is laying or use process
In easily damaged, and poor to the weatherability of environment, in cold area, temperature subzero is not suitable for cable laying operation,
At this moment the easy embrittlement of polyethylene tube；Additionally PE pipe is the most aging, and service life is relatively low.
In order to solve the problems referred to above, developmental research hdpe pipe, the use temperature of hdpe pipe
Degree scope relatively common PE tubing width, quality is hard and flexible, and internal pressure strength is high, and environmental stress crack resistance is good.But
It is that the hdpe pipe of China is relatively fewer, now desires to, by polyethylene does some study on the modification, improve poly-second
The intensity of alkene communication tubing, improves its environmental resistance, widens its temperature range using environment.
Summary of the invention
It is an object of the invention to the problem above overcoming prior art to exist, it is provided that a kind of high-strength polyethylene communication tube
Material and preparation method thereof, the present invention passes through polyvinyl piping materials formula and the improvement of preparation technology, improves the intensity of tubing, have
Hard quality, and also there is preferable toughness, environmental resistance is preferable.
For realizing above-mentioned technical purpose, reaching above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of high-strength polyethylene communication tubing, the material of communication tubing includes component A, component B and adjuvant component C, presses
According to parts by weight meter, described component A includes:
High density polyethylene (HDPE) 100 parts
Silane 0.5-3.0 part
Cumyl peroxide 0.05-0.15 part
Described component B includes:
High density polyethylene (HDPE) 100 parts
Dibutyl tin laurate 0.02-1 part
Described adjuvant component C includes:
Antioxidant 0.5-1.5 part
Benzophenone ultraviolet absorbent 0.6-0.8 part,
Wherein, described high density polyethylene (HDPE) is PE100 level high-density polyethylene, described silane include following in one or
Several: vinyltrimethoxy silane, VTES, vinyl three (2-methoxy ethoxy) silane, 3-first
Base acryloxypropyl trimethoxy silane.
It is further preferred that described antioxidant include following in one or more: propanoic acid positive octadecanol ester, sulfur generation two
The double tridecanol ester of propanoic acid, the double tetradecyl alchohol ester of thio-2 acid, the double lauryl alcohol ester of thio-2 acid, the double octadecanol of thio-2 acid
Ester.
It is further preferred that described benzophenone ultraviolet absorbent include following in one or more: 2-hydroxyl-
4-methoxy benzophenone, Octabenzone, 2-hydroxyl-4-dodecyloxy benzophenones.
It is further preferred that a kind of method preparing high-strength polyethylene communication tubing, comprise the following steps:
Step one, weigh material according to the proportional amount of each component in communication tubing material prescription, standby；
Step 2, the high density polyethylene (HDPE) in component A is dried, then with silane, as the peroxidating of initiator
Diisopropylbenzene (DIPB) puts in high-speed mixer, under the speed of 4000r/min, mixes 3min, is put into by the material of mixing and nibbles in the same direction
Close in parallel double-screw comminutor, extruding pelletization, it is thus achieved that A expects grain；
Step 3, high density polyethylene (HDPE), dibutyl tin laurate and auxiliary agent by component B are put into the most mixed
In conjunction machine, under the speed of 4000r/min, mix 1.5min, the material of mix homogeneously is put in single screw extrusion machine, squeeze
Go out pelletize, it is thus achieved that B expects grain；
Step 4, by the A material grain obtained in step 2 neutralization procedure three, B material grain with the ratio mix homogeneously of 95:5, then
Put in double screw extruder and extrude, obtain the material of crosslinkable communication tubing, then material is put in 40-55 DEG C of water
Crosslinking, prepares high-strength polyethylene communication pipe material；
Step 5, the pipe material plasticizing forming that communicated by the high-strength polyethylene prepared in step 4 are prepared as tubing i.e.
Can.
It is further preferred that in described step 2, in engaging parallel double-screw comminutor in the same direction, each stage extruding pelletization
Process conditions be: first paragraph temperature is 140 DEG C, and second segment temperature is 150 DEG C, and the 3rd section of temperature is 160 DEG C, the 4th section of temperature
Being 180 DEG C, the 5th section of temperature is 190 DEG C, and the 6th section of temperature is 200 DEG C, and head temperature is 195 DEG C, and melt temperature is 190 DEG C,
Rate of feeding is 19.5r/min, and engine speed is 40.5r/min, and hauling speed is 51.5r/min.
It is further preferred that described step 3 in single screw extrusion machine process conditions is: barrel zone temperature is 160-170
DEG C, 180-190 DEG C, 190-200 DEG C, 200-210 DEG C, screw speed is 20rpm.
It is further preferred that in step 4 before mixing A material grain and B material grain, if mixing A material grain and B material grain are moist,
A is expected, and grain and B material grain are dried 4-5 hour at 80 DEG C.
The invention has the beneficial effects as follows:
The present invention improves the formula of polyethylene communication tubing by the way of organosilane crosslinked polyethylene, improves tubing
Intensity, has hard quality, and also has preferable toughness, and environmental resistance is preferable.
The present invention selects PE100 level high-density polyethylene, which raises the mechanical property in whole material prescription, thermostability
With performances such as resisting environmental stress and crackings, and graft effect is good；The content of initiator is relatively big on the impact of material, if too low,
Do not reach initiation, if too high, can occur to cross-link largely in extrusion, cause material fluidity to decline,
Outward appearance is coarse, and the content of the initiator of the present invention is suitable, and the material appearance of extrusion is smooth.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, the detailed description of the invention of the present invention is shown in detail in by following example.
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described enforcement
Example is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under not making creative work premise, broadly falls into the model of present invention protection
Enclose.
Embodiment 1
Disclosing the formula of a kind of high-strength polyethylene communication tubing in embodiment 1, its formula is as shown in table 1.
High-strength polyethylene communication tubing formula table in table 1 embodiment 1
Embodiment 2
Disclosing the formula of a kind of high-strength polyethylene communication tubing in embodiment 2, it is distinguished as selection with embodiment 1
Silane different, its formula is as shown in table 2.
High-strength polyethylene communication tubing formula table in table 2 embodiment 2
Embodiment 3
Disclosing the formula of a kind of high-strength polyethylene communication tubing in embodiment 3, it is to select with the difference of embodiment 1
Silane different, as shown in table 3.
High-strength polyethylene communication tubing formula table in table 3 embodiment 3
Embodiment 4
Formula disclosed in embodiment 4 is that the silane selected is different from the difference in embodiment 1, and it is as shown in table 4.
High-strength polyethylene communication tubing formula table in table 4 embodiment 4
In experimentation, finding that the hydrolysis rate of VTMS is maximum, the grafting rates of VTES is more than VTMS, is preparing material
When, as relatively slow optimal in fruit component hydrolysis degree before reaching grafting and requiring, therefore, select VTES
VTES is optimal silane, therefore, in subsequent embodiment, as a example by VTES.
Embodiment 5
Embodiment 5 discloses the formula of a kind of tubing that communicates, its with the content that the difference in embodiment 1 is silane, draw
The content sending out agent content and other component is different, as shown in table 5.
Formula table in table 5 embodiment 5
Embodiment 6
Embodiment 6 discloses the formula of a kind of tubing that communicates, as shown in table 6.
Formula table in table 6 embodiment 6
Comparative example
Comparative example identical high density polyethylene (HDPE) and auxiliary agent, prepare common high-density polyethylene material, change
Property, contrast with the modified polyvinyl piping materials in above-described embodiment.
Above-described embodiment 1-6 is processed into, with comparative example, the tubing that communicates, comprises the following steps:
Step one, weigh material according to the proportional amount of each component in communication tubing material prescription, standby；
Step 2, the high density polyethylene (HDPE) in component A is dried, then with silane, as the peroxidating of initiator
Diisopropylbenzene (DIPB) puts in high-speed mixer, under the speed of 4000r/min, mixes 3min, is put into by the material of mixing and nibbles in the same direction
Close in parallel double-screw comminutor, extruding pelletization, it is thus achieved that A expects grain.
In above-mentioned steps two, in engaging parallel double-screw comminutor in the same direction, the process conditions of each stage extruding pelletization
For: first paragraph temperature is 140 DEG C, and second segment temperature is 150 DEG C, and the 3rd section of temperature is 160 DEG C, and the 4th section of temperature is 180 DEG C, the
Five sections of temperature are 190 DEG C, and the 6th section of temperature is 200 DEG C, and head temperature is 195 DEG C, and melt temperature is 190 DEG C, and rate of feeding is
19.5r/min, engine speed is 40.5r/min, and hauling speed is 51.5r/min.
Step 3, high density polyethylene (HDPE), dibutyl tin laurate and auxiliary agent by component B are put into the most mixed
In conjunction machine, under the speed of 4000r/min, mix 1.5min, the material of mix homogeneously is put in single screw extrusion machine, squeeze
Go out pelletize, it is thus achieved that B expects grain.
Above-mentioned steps three in single screw extrusion machine process conditions is: barrel zone temperature is 160-170 DEG C, 180-190 DEG C,
190-200 DEG C, 200-210 DEG C, screw speed is 20rpm.
Step 4, by the A material grain obtained in step 2 neutralization procedure three, B material grain with the ratio mix homogeneously of 95:5, then
Put in double screw extruder and extrude, obtain the material of crosslinkable communication tubing, then material is put in 40-55 DEG C of water
Crosslinking, prepares high-strength polyethylene communication pipe material.
Step 5, the pipe material plasticizing forming that communicated by the high-strength polyethylene prepared in step 4 are prepared as tubing i.e.
Can.
In step 4 before mixing A material grain and B material grain, if mixing A material grain and B material grain are moist, A is expected grain and B material
Grain is dried 4-5 hour at 80 DEG C.
Performance test
(1) hot strength test
Hot strength is one of most basic performance of PVC material, sample under tension effect, until fracture, sample bears
Maximum tensile stress, hot strength is big, and excellent performance is tested according to GB GB/T1040-2006.
(2) bending strength test
Bending strength test is mainly used to the inspection communication tubing performance when bearing bending load effect, conventional bending examination
Test the degree of bending property and the plastic deformation evaluating material, according to GB GB/T9341-2000.
(3) impact strength performance test
Measuring material impact intensity under the effect of shock loading, impact strength is used for evaluating material and supports shock proof ability
Or judge fragility or the degree of flexibility of material, test according to GB GB/T1843-1996.
The material of embodiment 1, embodiment 5, embodiment 6 and comparative example is carried out performance test, the result obtained such as table 7 institute
Show.
Table 7 result test table
From the result data in table 7, after organosilane crosslinked polyethylene, hot strength significantly improves, elongation at break
Declining, bending strength reduces, and impact strength improves, this is because structurally form network structure after silane polyethylene coach,
Intermolecular active force increases, and improves the mechanical property of material.
Contrast between embodiment 1,5 and 6, it is seen that the combination property of embodiment 5 is the most superior, using embodiment 5 as most preferably
Embodiment.
By in above-described embodiment, it is seen that for antioxidant, benzophenone ultraviolet absorbent selection to material
The impact of energy is little.
Therefore, for the selection of the tubing material prescription that communicates, select suitable silane and consumption the most important.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (7)
1. a high-strength polyethylene communication tubing, the material of communication tubing includes component A, component B and adjuvant component C, and it is special
Levying and be, in parts by weight, described component A includes:
High density polyethylene (HDPE) 100 parts
Silane 0.5-3.0 part
Cumyl peroxide 0.05-0.15 part
Described component B includes:
High density polyethylene (HDPE) 100 parts
Dibutyl tin laurate 0.02-1 part
Described adjuvant component C includes:
Antioxidant 0.5-1.5 part
Benzophenone ultraviolet absorbent 0.6-0.8 part,
Wherein, described high density polyethylene (HDPE) is PE100 level high-density polyethylene, described silane include following in one or several
Kind: vinyltrimethoxy silane, VTES, vinyl three (2-methoxy ethoxy) silane, 3-methyl
Acryloxypropyl trimethoxy silane.
A kind of high-strength polyethylene communication tubing the most according to claim 1, it is characterised in that described antioxidant include with
One or more in Xia: the double tetradecyl alchohol ester of propanoic acid positive octadecanol ester, thio-2 acid pair tridecanol ester, thio-2 acid,
The double lauryl alcohol ester of thio-2 acid, the double octadecyl of thio-2 acid.
A kind of high-strength polyethylene communication tubing the most according to claim 1, it is characterised in that described benzophenone is purple
Ultraviolet absorbers include following in one or more: ESCALOL 567,2-hydroxyl-4-n-octyloxy two
Benzophenone, 2-hydroxyl-4-dodecyloxy benzophenones.
4. the method preparing the high-strength polyethylene communication tubing described in claim 1-3 any one, its feature exists
In, comprise the following steps:
Step one, weigh material according to the proportional amount of each component in communication tubing material prescription, standby；
Step 2, being dried by the high density polyethylene (HDPE) in component A, then the peroxidating two with silane, as initiator is different
Propyl benzene puts in high-speed mixer, under the speed of 4000r/min, mixes 3min, the material of mixing is put into engagement in the same direction flat
In row dual-screw pelletizer, extruding pelletization, it is thus achieved that A expects grain；
High-speed mixer put into by step 3, high density polyethylene (HDPE), dibutyl tin laurate and auxiliary agent by component B
In, under the speed of 4000r/min, mixing 1.5min, the material of mix homogeneously is put in single screw extrusion machine, extrusion is made
Grain, it is thus achieved that B expects grain；
Step 4, by step 2 neutralization procedure three obtains A material grain, B material grain with the ratio mix homogeneously of 95:5, then put into
Extrude in double screw extruder, obtain the material of crosslinkable communication tubing, then material is put in 40-55 DEG C of water and hand over
Connection, prepares high-strength polyethylene communication pipe material；
Step 5, the pipe material plasticizing forming that communicated by the high-strength polyethylene prepared in step 4 are prepared as tubing.
A kind of method preparing high-strength polyethylene communication tubing the most according to claim 4, it is characterised in that described step
In rapid two, in engaging parallel double-screw comminutor in the same direction, the process conditions of each stage extruding pelletization are: first paragraph temperature is
140 DEG C, second segment temperature is 150 DEG C, and the 3rd section of temperature is 160 DEG C, and the 4th section of temperature is 180 DEG C, and the 5th section of temperature is 190
DEG C, the 6th section of temperature is 200 DEG C, and head temperature is 195 DEG C, and melt temperature is 190 DEG C, and rate of feeding is 19.5r/min, main frame
Rotating speed is 40.5r/min, and hauling speed is 51.5r/min.
A kind of method preparing high-strength polyethylene communication tubing the most according to claim 4, it is characterised in that described step
In rapid three in single screw extrusion machine process conditions it is: barrel zone temperature is 160-170 DEG C, 180-190 DEG C, 190-200 DEG C, 200-
210 DEG C, screw speed is 20rpm.
A kind of method preparing high-strength polyethylene communication tubing the most according to claim 4, it is characterised in that step 4
In before mixing A material grain and B material grain, if mixing A material grain and B material grain are moist, A is expected, and grain and B material grain are dried at 80 DEG C
4-5 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610527382.2A CN105906926A (en) | 2016-07-06 | 2016-07-06 | High-strength polyethylene tube for communication and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610527382.2A CN105906926A (en) | 2016-07-06 | 2016-07-06 | High-strength polyethylene tube for communication and preparation method thereof |
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| CN105906926A true CN105906926A (en) | 2016-08-31 |
Family
ID=56754532
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| CN201610527382.2A Pending CN105906926A (en) | 2016-07-06 | 2016-07-06 | High-strength polyethylene tube for communication and preparation method thereof |
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| CN107987353A (en) * | 2017-12-11 | 2018-05-04 | 济南市热力工程公司 | A kind of floor heating heating tube of low linear expansion coefficient and preparation method thereof |
| CN108517065A (en) * | 2018-04-10 | 2018-09-11 | 浙江中元枫叶管业有限公司 | A kind of double-wall corrugated pipe polyvinyl piping materials |
| CN108948499A (en) * | 2018-08-01 | 2018-12-07 | 浙江邦德管业有限公司 | A kind of shock resistance high-strength polyethylene communication tube and preparation method thereof |
| CN115895093A (en) * | 2023-02-16 | 2023-04-04 | 天津华德科技有限公司 | Antistatic breathable film and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107987353A (en) * | 2017-12-11 | 2018-05-04 | 济南市热力工程公司 | A kind of floor heating heating tube of low linear expansion coefficient and preparation method thereof |
| CN108517065A (en) * | 2018-04-10 | 2018-09-11 | 浙江中元枫叶管业有限公司 | A kind of double-wall corrugated pipe polyvinyl piping materials |
| CN108948499A (en) * | 2018-08-01 | 2018-12-07 | 浙江邦德管业有限公司 | A kind of shock resistance high-strength polyethylene communication tube and preparation method thereof |
| CN108948499B (en) * | 2018-08-01 | 2021-04-27 | 浙江邦德管业有限公司 | Impact-resistant high-strength polyethylene communication pipe and preparation method thereof |
| CN115895093A (en) * | 2023-02-16 | 2023-04-04 | 天津华德科技有限公司 | Antistatic breathable film and preparation method thereof |
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