CN106589524A - Polyethylene sheath material for optical cable and preparation process thereof - Google Patents
Polyethylene sheath material for optical cable and preparation process thereof Download PDFInfo
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- CN106589524A CN106589524A CN201611059855.7A CN201611059855A CN106589524A CN 106589524 A CN106589524 A CN 106589524A CN 201611059855 A CN201611059855 A CN 201611059855A CN 106589524 A CN106589524 A CN 106589524A
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
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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
- 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
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
-
- 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- 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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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention provides a polyethylene sheath material for an optical cable and a preparation process thereof, and relates to the technical field of macromolecular materials. The polyethylene sheath material for the optical cable is prepared from the following raw materials: polyethylene, a compatibilizer, a nucleating agent, a carbon black master batch, a plastic brightener, an antioxidant, a stabilizer and a lubricating agent. The polyethylene sheath material for the optical cable is high in softness, low in cost and high in mechanical property, has a small change of the size after being formed, is smooth in appearance, high in heat resistance, easy to process and more convenient for coiling of the optical cable, can adapt to changes of the surrounding environment and is extremely high in comprehensive mechanical property and environmental performance.
Description
Technical field
The present invention relates to technical field of polymer materials, and in particular to a kind of polyethylene sheathing material for optical cable and its preparation work
Skill.
Background technology
Optical cable is used at a high speed and long-distance transmissions information many year.In China, fiber optic communication was opened from the end of the seventies
Begin with having had a surplus within 20 years till now, especially in recent years, the extensive of optical fiber cable adopts more notable.The transmission of optical cable
Medium is the very thin optical fiber as made by the glass fibre of hair, and these optical fiber are usually located in a sheath or core pipe.Conventional
Optical cable sheath material is two kinds of modified polypropene (PP) and polybutylene terephthalate (PBT), external America and Europe's major cable
Manufacturer selects MODIFIED PP material, selects PBT material domestic fiber optic cable manufacture manufacturer more.
At present, with the development of China's economic construction, what communication career also maked rapid progress occurs to change, for communicating light
The prescription more and more higher of cable sheath material, it is desirable to which has excellent weatherability, toughness, wearability and environmental stress resistance
Outside cracking behavior, it is also desirable that while can have good technology capability and flexibility, the cable surface for growing is smooth.
But the optical cable sheath material of existing production is mostly hardness height, bad mechanical property, and difficulty of processing to be compared
Greatly, for optical cable is relatively difficult into disk.Therefore, it is badly in need of adapting to optical fiber cable material improvement the change of surrounding, reduces
Optical cable cost.
The content of the invention
Not enough for prior art, the present invention provides a kind of polyethylene sheathing material for optical cable and preparation method thereof, solves
Prior art optical cable is with sheath material hardness is high, bad mechanical property technical problem.
To realize object above, technical scheme is achieved by the following technical programs：
A kind of polyethylene sheathing material for optical cable, the polyethylene sheathing material for optical cable are made up of the raw material of following weight portion：
45～70 parts of polyethylene, 3～6 parts of bulking agent, 1～4 part of nucleator, 5～15 parts of black masterbatch, plastics brightener 0.5～1.5
Part, 0.5～2 part of antioxidant, 0.5～2 part of stabilizer, 0.5～1 part of lubricant.
Preferably, the polyethylene is that high density polyethylene (HDPE) is formed with medium density polyethylene compounding, and high density polyethylene (HDPE)
Mass ratio with medium density polyethylene is 1:1～2:3.
Preferably, the stabilizer is at least in the double lauryl alcohol esters of thio-2 acid, maleic acid pink salt, diphenylamines
Kind.
Preferably, the plastics brightener is modified amide waxe.
Preferably, the nucleator be styrene, acrylate, at least one in methacrylate.
Preferably, the antioxidant is antioxidant 1076, antioxidant 225, antioxidant 264, irgasfos 168, phosphite ester
At least one in antioxidant.
Preferably, the bulking agent is that polypropylene grafted glycidyl methacrylate, linear low density of polyethylene connect
Branch glycidyl methacrylate, linear low density of polyethylene grafted maleic anhydride, ethylene-butylene copolymer grafted maleic
At least one in acid anhydride.
Preferably, the lubricant be Tissuemat E, vinyl acetate wax, acrylic acid wax, in maleic acid grafted polyethylene wax
At least one.
A kind of preparation technology of polyethylene sheathing material for optical cable, comprises the following steps：
S1, each raw material is weighed according to parts by weight of raw materials；
S2, white carbon black is made into masterbatch, evenly spread in polyethylene base material, add bulking agent, nucleator and stir, obtain
Polyethylene master batch；
S3, plastics brightener, antioxidant, stabilizer, lubricant are added sequentially in polyethylene master batch obtained in step S2, are mixed
10～20min is closed, premix material is obtained；
S4, by premix material add double screw extruder in extruding pelletization, you can, wherein double-screw extruder screw temperature be 180
～220 DEG C, screw speed is 75～150 r/min.
Preferably, the screw speed is 100 r/min.
The present invention provides a kind of polyethylene sheathing material for optical cable and preparation method thereof, and advantage exists compared with prior art
In：
The present invention prepare polyethylene sheathing material for optical cable flexibility is good, size after low cost, good mechanical performance and molding
Change little, smooth in appearance, excellent heat resistance, be easily worked, the optical cable pe sheath more convenient into disk for optical cable
Material can adapt to the change of surrounding, with good comprehensive mechanical performance and environmental performance, especially for large core number
Optical cable, caliber are easier to do big；Good bending, after-contraction, heat ageing, hydrolysis property further improve the service life of optical cable
And transmission performance；
The present invention adopts high density and medium density polyethylene as the base material of cable jacket, their stable chemical performance, normal
Any organic solvent is practically insoluble under temperature, the corrosion of resistant to many acid, alkali and saline solution, watertightness are good, water vapour permeability
Very low, processing characteristics is good, additionally, various adjuvants are added in base material, can improve the performance of cable jacket, meets
The various use requirements of optical cable, have broad application prospects.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, with reference to the embodiment of the present invention pair
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of the invention
Embodiment, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound
The every other embodiment obtained under the premise of the property made work, belongs to the scope of protection of the invention.
Embodiment 1：
The present embodiment polyethylene sheathing material for optical cable is made up of the raw material of following weight portion：45 parts of polyethylene, 3 parts of bulking agent,
1 part of nucleator, 5 parts of black masterbatch, modified 0.5 part of amide waxe, 0.5 part of antioxidant, 0.5 part of stabilizer, 0.5 part of lubricant；
Wherein polyethylene is that high density polyethylene (HDPE) is formed with medium density polyethylene compounding, and high density polyethylene (HDPE) and the poly- second of Midst density
The mass ratio of alkene is 1:1；
Stabilizer is the double lauryl alcohol esters of thio-2 acid；Nucleator is styrene；Bulking agent is polypropylene grafted methacrylic acid
Ethylene oxidic ester；Lubricant is Tissuemat E；
The preparation technology of the present embodiment polyethylene sheathing material for optical cable, comprises the following steps：
S1, each raw material is weighed according to parts by weight of raw materials；
S2, white carbon black is made into masterbatch, evenly spread in polyethylene base material, add bulking agent, nucleator and stir, obtain
Polyethylene master batch；
S3, plastics brightener, antioxidant, stabilizer, lubricant are added sequentially in polyethylene master batch obtained in step S2, are mixed
10min is closed, premix material is obtained；
S4, by premix material add double screw extruder in extruding pelletization, you can, wherein double-screw extruder screw temperature be 180
DEG C, screw speed is 75 r/min.
Embodiment 2：
The present embodiment polyethylene sheathing material for optical cable is made up of the raw material of following weight portion：70 parts of polyethylene, 6 parts of bulking agent,
4 parts of nucleator, 15 parts of black masterbatch, 1.5 parts of plastics brightener, 2 parts of antioxidant, 2 parts of stabilizer, 1 part of lubricant；
Wherein polyethylene is that high density polyethylene (HDPE) is formed with medium density polyethylene compounding, and high density polyethylene (HDPE) and the poly- second of Midst density
The mass ratio of alkene is 2:3；
Stabilizer is maleic acid pink salt；Nucleator is acrylate；Bulking agent is that linear low density of polyethylene is grafted metering system
Acid glycidyl ester；Lubricant is vinyl acetate wax；Antioxidant includes antioxidant 1076；
The preparation technology of the present embodiment polyethylene sheathing material for optical cable, comprises the following steps：
S1, each raw material is weighed according to parts by weight of raw materials；
S2, white carbon black is made into masterbatch, evenly spread in polyethylene base material, add bulking agent, nucleator and stir, obtain
Polyethylene master batch；
S3, plastics brightener, antioxidant, stabilizer, lubricant are added sequentially in polyethylene master batch obtained in step S2, are mixed
20min is closed, premix material is obtained；
S4, by premix material add double screw extruder in extruding pelletization, you can, wherein double-screw extruder screw temperature be 220
DEG C, screw speed is 150 r/min.
Embodiment 3：
The present embodiment polyethylene sheathing material for optical cable is made up of the raw material of following weight portion：57 parts of polyethylene, 5 parts of bulking agent,
2 parts of nucleator, 10 parts of black masterbatch, modified 1 part of amide waxe, 1 part of antioxidant, 1.2 parts of stabilizer, 1.3 parts of lubricant；
Wherein polyethylene is that high density polyethylene (HDPE) is formed with medium density polyethylene compounding, and high density polyethylene (HDPE) and the poly- second of Midst density
The mass ratio of alkene is 1:2；
Stabilizer is diphenylamines；Nucleator is methacrylate；Bulking agent is linear low density of polyethylene grafted maleic anhydride；
Lubricant is acrylic acid wax；Antioxidant is antioxidant 225；
The preparation technology of the present embodiment polyethylene sheathing material for optical cable, comprises the following steps：
S1, each raw material is weighed according to parts by weight of raw materials；
S2, white carbon black is made into masterbatch, evenly spread in polyethylene base material, add bulking agent, nucleator and stir, obtain
Polyethylene master batch；
S3, plastics brightener, antioxidant, stabilizer, lubricant are added sequentially in polyethylene master batch obtained in step S2, are mixed
15min is closed, premix material is obtained；
S4, by premix material add double screw extruder in extruding pelletization, you can, wherein double-screw extruder screw temperature be 200
DEG C, screw speed is 100 r/min.
Embodiment 4：
The present embodiment polyethylene sheathing material for optical cable is made up of the raw material of following weight portion：52 parts of polyethylene, 4 parts of bulking agent,
2 parts of nucleator, 8 parts of black masterbatch, modified 0.8 part of amide waxe, 1 part of antioxidant, 0.9 part of stabilizer, 1.1 parts of lubricant；
Wherein polyethylene is that high density polyethylene (HDPE) is formed with medium density polyethylene compounding, and high density polyethylene (HDPE) and the poly- second of Midst density
The mass ratio of alkene is 1:3；
Stabilizer is mixed for the double lauryl alcohol esters of thio-2 acid, maleic acid pink salt, diphenylamines；Nucleator be styrene, third
Olefin(e) acid ester, methacrylate are mixed；Bulking agent is polypropylene grafted glycidyl methacrylate；Lubricant is poly-
Ethylene waxes；Antioxidant is antioxidant 1076, antioxidant 225, antioxidant 264 is mixed；
The preparation technology of the present embodiment polyethylene sheathing material for optical cable, comprises the following steps：
S1, each raw material is weighed according to parts by weight of raw materials；
S2, white carbon black is made into masterbatch, evenly spread in polyethylene base material, add bulking agent, nucleator and stir, obtain
Polyethylene master batch；
S3, plastics brightener, antioxidant, stabilizer, lubricant are added sequentially in polyethylene master batch obtained in step S2, are mixed
12min is closed, premix material is obtained；
S4, by premix material add double screw extruder in extruding pelletization, you can, wherein double-screw extruder screw temperature be 190
DEG C, screw speed is 95 r/min.
Embodiment 5：
The present embodiment polyethylene sheathing material for optical cable is made up of the raw material of following weight portion：60 parts of polyethylene, 5 parts of bulking agent,
Nucleator 3,12 parts of black masterbatch, modified 1.3 parts of amide waxe, 1.6 parts of antioxidant, 1.7 parts of stabilizer, 1.8 parts of lubricant；
Wherein polyethylene is that high density polyethylene (HDPE) is formed with medium density polyethylene compounding, and high density polyethylene (HDPE) and the poly- second of Midst density
The mass ratio of alkene is 2:3；
Stabilizer is the double lauryl alcohol esters of thio-2 acid；Nucleator is styrene；Bulking agent is grafted for linear low density of polyethylene
Glycidyl methacrylate, linear low density of polyethylene grafted maleic anhydride, ethylene-butylene copolymer grafted maleic anhydride
Mix；Lubricant is vinyl acetate wax, acrylic acid wax, maleic acid grafted polyethylene wax are mixed；Antioxidant is antioxygen
Agent 225, antioxidant 264, irgasfos 168, phosphite antioxidant are mixed；
The preparation technology of the present embodiment polyethylene sheathing material for optical cable, comprises the following steps：
S1, each raw material is weighed according to parts by weight of raw materials；
S2, white carbon black is made into masterbatch, evenly spread in polyethylene base material, add bulking agent, nucleator and stir, obtain
Polyethylene master batch；
S3, plastics brightener, antioxidant, stabilizer, lubricant are added sequentially in polyethylene master batch obtained in step S2, are mixed
18min is closed, premix material is obtained；
S4, by premix material add double screw extruder in extruding pelletization, you can, wherein double-screw extruder screw temperature be 210
DEG C, screw speed is 135 r/min.
In sum, the present invention prepare polyethylene sheathing material for optical cable flexibility is good, low cost, good mechanical performance
And after molding, change in size is little, smooth in appearance, excellent heat resistance, is easily worked, the optical cable more convenient into disk for optical cable
The change of surrounding be can adapt to polyethylene sheathing material, with good comprehensive mechanical performance and environmental performance, especially
It is that, for high fiber count cable, caliber is easier to do big；Good bending, after-contraction, heat ageing, hydrolysis property further improve light
The service life and transmission performance of cable；
The present invention adopts high density and medium density polyethylene as the base material of cable jacket, their stable chemical performance, normal
Any organic solvent is practically insoluble under temperature, the corrosion of resistant to many acid, alkali and saline solution, watertightness are good, water vapour permeability
Very low, processing characteristics is good, additionally, various adjuvants are added in base material, can improve the performance of cable jacket, meets
The various use requirements of optical cable, have broad application prospects.
It should be noted that above example is only to illustrate technical scheme, rather than a limitation；Although ginseng
The present invention is described in detail according to previous embodiment, it will be understood by those within the art that：Which still can be with
Technical scheme described in foregoing embodiments is modified, or equivalent is carried out to which part technical characteristic；And
These modifications are replaced, and do not make the essence of appropriate technical solution depart from the spirit and model of various embodiments of the present invention technical scheme
Enclose.
Claims (10)
1. a kind of polyethylene sheathing material for optical cable, it is characterised in that the polyethylene sheathing material for optical cable is by following weight
The raw material of part is made：45～70 parts of polyethylene, 3～6 parts of bulking agent, 1～4 part of nucleator, 5～15 parts of black masterbatch, plastic light
Bright dose 0.5～1.5 part, 0.5～2 part of antioxidant, 0.5～2 part of stabilizer, 0.5～1 part of lubricant.
2. polyethylene sheathing material for optical cable according to claim 1, it is characterised in that：The polyethylene is poly- for high density
Ethylene is formed with medium density polyethylene compounding, and high density polyethylene (HDPE) and the mass ratio of medium density polyethylene are 1:1～2:3.
3. polyethylene sheathing material for optical cable according to claim 1, it is characterised in that：The stabilizer is thio dipropyl
At least one in sour double lauryl alcohol esters, maleic acid pink salt, diphenylamines.
4. polyethylene sheathing material for optical cable according to claim 1, it is characterised in that：The plastics brightener is modified
Amide waxe.
5. polyethylene sheathing material for optical cable according to claim 1, it is characterised in that：The nucleator be styrene,
At least one in acrylate, methacrylate.
6. polyethylene sheathing material for optical cable according to claim 1, it is characterised in that：The antioxidant is antioxidant
1076th, at least one in antioxidant 225, antioxidant 264, irgasfos 168, phosphite antioxidant.
7. polyethylene sheathing material for optical cable according to claim 1, it is characterised in that：The bulking agent is connect for polypropylene
Branch glycidyl methacrylate, linear low density of polyethylene graft glycidyl methacrylate, linear low density gather
At least one in Vinyl Graft maleic anhydride, ethylene-butylene copolymer grafted maleic anhydride.
8. polyethylene sheathing material for optical cable according to claim 1, it is characterised in that：The lubricant is polyethylene
At least one in wax, vinyl acetate wax, acrylic acid wax, maleic acid grafted polyethylene wax.
9. a kind of preparation technology of the polyethylene sheathing material for optical cable as described in claim 1～8 is arbitrary, it is characterised in that
Comprise the following steps：
S1, each raw material is weighed according to parts by weight of raw materials；
S2, white carbon black is made into masterbatch, evenly spread in polyethylene base material, add bulking agent, nucleator and stir, obtain
Polyethylene master batch；
S3, plastics brightener, antioxidant, stabilizer, lubricant are added sequentially in polyethylene master batch obtained in step S2, are mixed
10～20min is closed, premix material is obtained；
S4, by premix material add double screw extruder in extruding pelletization, you can, wherein double-screw extruder screw temperature be 180
～220 DEG C, screw speed is 75～150 r/min.
10. preparation method according to claim 9, it is characterised in that：The screw speed is 100 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611059855.7A CN106589524A (en) | 2016-11-28 | 2016-11-28 | Polyethylene sheath material for optical cable and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611059855.7A CN106589524A (en) | 2016-11-28 | 2016-11-28 | Polyethylene sheath material for optical cable and preparation process thereof |
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| CN106589524A true CN106589524A (en) | 2017-04-26 |
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| CN201611059855.7A Withdrawn CN106589524A (en) | 2016-11-28 | 2016-11-28 | Polyethylene sheath material for optical cable and preparation process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112457552A (en) * | 2020-11-17 | 2021-03-09 | 苏州亨利通信材料有限公司 | Weather-resistant low-density polyethylene insulating material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807693A (en) * | 2011-05-31 | 2012-12-05 | 江苏南方通信科技有限公司 | Sheath material for optical fiber cable, and production process thereof |
| CN106046540A (en) * | 2016-06-22 | 2016-10-26 | 南京华信藤仓光通信有限公司 | Novel optical cable outer sheath material and preparation method thereof |
-
2016
- 2016-11-28 CN CN201611059855.7A patent/CN106589524A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807693A (en) * | 2011-05-31 | 2012-12-05 | 江苏南方通信科技有限公司 | Sheath material for optical fiber cable, and production process thereof |
| CN106046540A (en) * | 2016-06-22 | 2016-10-26 | 南京华信藤仓光通信有限公司 | Novel optical cable outer sheath material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 钟志雄: "《塑料注射成型技术》", 31 March 1989 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112457552A (en) * | 2020-11-17 | 2021-03-09 | 苏州亨利通信材料有限公司 | Weather-resistant low-density polyethylene insulating material and preparation method thereof |
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Application publication date: 20170426 |