CN1079541C - Communication cable, optical cable protecting casing material of high-density polyethylene - Google Patents
Communication cable, optical cable protecting casing material of high-density polyethylene Download PDFInfo
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- CN1079541C CN1079541C CN98111977A CN98111977A CN1079541C CN 1079541 C CN1079541 C CN 1079541C CN 98111977 A CN98111977 A CN 98111977A CN 98111977 A CN98111977 A CN 98111977A CN 1079541 C CN1079541 C CN 1079541C
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- density polyethylene
- high density
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- optical cable
- carbon black
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Abstract
The present invention relates to a special material of the outer sheaths of high density polyethylene (HDPE) communication cables and optical cables. The present invention mainly comprises HDPE, a small amount of carbon black, a melt viscosity modifier, a low-molecular weight polyethylene processing aid, a higher fatty acid soap processing aid and a minute quantity of antioxidant, wherein the melt viscosity modifier is used for improving the processing property of the special material. The special material of the outer sheaths, which is manufactured by the present invention, can prevent environmental stress cracking, has good flexibility and a long service life above 1000 hours, and can meet the design requirements of the cables and optical cables for the service lives of 30 years. The present invention can be used for the outer sheaths of the communication cables and the communication optical cables; the present invention also has the advantages of simple process, easy control and capability of substituting the existing low-density polyethylene (LDPE) sheath materials or linear low-density polyethylene (LLDPE) sheath materials.
Description
The present invention relates to telecommunication cable, optical cable special material for outer protective sleeve, is telecommunication cable, the optical cable special material for outer protective sleeve of Main Ingredients and Appearance with high density polyethylene (being called for short HDPE) particularly.
Telecommunication cable, optical cable special material for outer protective sleeve mainly contain three major types, are respectively to be Main Ingredients and Appearance with high density polyethylene (HDPE), low density polyethylene (LDPE) and linear low density polyethylene (LLDPE).In telecommunication cable, optical cable special material for outer protective sleeve technical field, for a long time to being that the protective cover material of Main Ingredients and Appearance is furtherd investigate with HDPE.The HDPE sheath PP Pipe Compound of prior art, its advantage are to make that to process the outer protective sleeve environmental stress cracking resistance good, and the life-span is long, and is wear-resistant.But the problem of its existence, the one, the processing temperature height, when making the telecommunication cable outer protective sleeve with it, therefore the defective communication cable insulation heart yearn of easily burning, can not be used as the telecommunication cable special material for outer protective sleeve, can only be used for making the processing cable jacket.And the processing temperature narrow range, not easy operation control, commercial production difficulty.Another problem is the outer protective sleeve that processes with this protective cover material, the hardness height, and pliability is poor, is difficult for crooked stranding, and particularly large diameter cable, optical cable outer protective sleeve more are difficult to crooked stranding, and therefore the production and construction difficulty has limited the use of this protective cover material.These problems still are not resolved through long-term the exploration, and people's approach of having to split is in addition studied other overcoat proprietary material.
People research and develop out in succession, also be at present widely used be telecommunication cable, the optical cable special material for outer protective sleeve of Main Ingredients and Appearance with LDPE and LLDP, compare with the sheath proprietary material that with HDPE is Main Ingredients and Appearance, processing temperature is low, the defective communication cable insulation heart yearn of can not burning during with its processing cable outer protective sleeve, both can be used for making fab communications cable outer layer sheath, also can be used for making the processing cable jacket.Another advantage is that to make the outer protective sleeve pliability process good, and flexible stranding is convenient to production and construction.But the place of its deficiency is, makes the sheath poor mechanical property that processes, and the resisting environmental stress and cracking life-span is short, is difficult to greater than 500 hours, and hardness is low, and is not wear-resistant, and when dilatory cable laying, optical cable, sheath destruction easy to wear is damaged conductor wire.
The objective of the invention is to avoid the weak point of prior art, and provide a kind of processing temperature low, good processability, good, the resisting environmental stress and cracking life-span length and anti abrasive of stranding are telecommunication cable, the optical cable special material for outer protective sleeve of Main Ingredients and Appearance with the high density polyethylene.
Purpose of the present invention can be achieved by the following technical programs:
The composition of HDPE telecommunication cable, optical cable special material for outer protective sleeve contains high density polyethylene, melt viscosity modifier, higher fatty acid soap processing aid and carbon black masterbatch, and the percentage by weight of each composition is:
High density polyethylene 86.8～88.5%
Melt viscosity modifier 3.0～5.0%
Higher fatty acid soap processing aid 0.3～0.5%
Carbon black master batch 5.0%
Nucleator 0.1～0.45%.
Wherein the carbon black master batch both can be the master batch form, also can not be the master batch form, promptly directly was starting material with the carbon black.When not adopting the master batch form, its weight percentages of components will correspondingly reduce.
In order more to help the realization of the object of the invention, the present invention has also taked following technical measures.These technical measures can be taked in individual event, also can take multinomial or in the lump.
Can in the sheath proprietary material, add percentage by weight and be 2.5% low molecular weight polyethylene.
Can in the sheath proprietary material, add percentage by weight and be 0.10～0.15% antioxidant.Antioxidant can adopt four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] to defend the tetrol ester season, antioxidant such as dilauryl thiodipropionate, and different antioxidant can add separately, also can add in the lump.For above-mentioned two kinds of antioxidant, no matter be independent adding, still add in the lump, their percentage by weight should be respectively in 0.075～0.100% and 0.050～0.100% scope.
It is 0.953g/cm that high density polyethylene preferably adopts density
3, melt index (MI) is 0.4g/10min.
It is 2000 that low molecular weight polyethylene preferably adopts mean molecular weight, and softening point temperature is 101 ℃.
It is 20nm that the carbon black master batch preferably adopts particle diameter, and the carbon black weight content is 40%, and the black chromatic value is 94.
Be used to promote that the nucleator of crystallization can adopt organic class nucleator, as methyl red, phenolphthalein etc.; Also can adopt the mineral-type nucleator, as Al (OH)
3Deng; Also can adopt the macromolecule nucleator, as ceresine etc.But preferably adopt organic class nucleator.
As the high density polyethylene of HDPE telecommunication cable, cable jacket proprietary material raw material, there are many good technical features, particularly resisting environmental stress and cracking and abrasion resistance properties fabulous, just processing temperature is higher, and temperature range is narrower, poor processability.In order to improve its processing characteristics, its processing temperature is reduced, processing temperature broadens, and satisfies the processing request of telecommunication cable, has added melt viscosity modifier among the present invention, and nucleator is to address the above problem.Melt viscosity modifier is ethene monocarboxylic acid vinyl esters multipolymer.
Owing to added melt viscosity modifier, behind the auxiliary agents such as nucleator, when protective cover material was extruded in melting, the surface of extrudate was also rough, thereby can't directly be used as telecommunication cable, protecting sleeve of optical cable.Another guardian technique measure of the present invention is to have added higher fatty acid soap processing aid, improving the processing characteristics of protective cover material of the present invention, and very effective.Low molecular weight polyethylene also has good effect to the processing characteristics of improving protective cover material of the present invention, also is a kind of good processing aid.Add higher fatty acid soap processing aid and low molecular weight polyethylene simultaneously, will be better to the improvement of sheath proprietary material processing characteristics of the present invention.The present invention adds above-mentioned processing aid in the high density polyethylene system; very having improved protective cover material of the present invention effectively extrudes processing characteristics; promptly eliminated the broken phenomenon of the melt of extruding in the journey; and the long-pending grain of extrusion neck ring mold phenomenon; processing temperature and head extrusion pressure have been reduced; improve rate of extrusion and extrudate surface smoothness, solved the processing characteristics improvement problem that the present invention's expectation will solve.
The starting material that the present invention is used, the production and sales unit of higher fatty acid soap class processing aid and melt viscosity modifier, known to the inventor, Sichuan Union University macromolecule research institute is in production and sales, and the producer of other materials production and sales is a lot.
Of the present invention open, as to have solved telecommunication cable, optical cable special material for outer protective sleeve technical field long-term existence and thirsted for solving problem, the i.e. bad difficult problem of protective cover material physical and mechanical properties of prior art.With protective cover material processing and fabricating cable, optical cable that the present invention produces, processing temperature is low, good processability, stranding is good, the resisting environmental stress and cracking life-span is long and abrasion resistance properties good, is particularly suitable for the large diameter cable of processing and fabricating, optical cable.
Subordinate list 1 is the comparison of protective cover material of the present invention and national act.std.Measurement data in the table 1 has fully shown the excellent properties that high density polyethylene protective cover material of the present invention is had.The present invention not only environmental stress cracking resistance excellent especially (the resisting environmental stress and cracking life-span of the present invention reaches 1000 hours, the protective cover material environmental stress cracking life-span of prior art is difficult to be higher than 500 hours), the other technologies index also is better than act.std and prior art far away as the key technical indexes such as pulling strengrth, elongation at breaks.
Subordinate list 2 is the linear low density polyethylene of processing characteristics of the present invention and prior art, the processing characteristics contrast of high density polyethylene protective cover material.Table 2 has fully shown the excellent machinability that protective cover material of the present invention HDPE/LLPE protective cover material is compared to prior art had, and promptly has wider processing temperature scope and lower processing temperature.
HDPE telecommunication cable disclosed by the invention, optical cable special material for outer protective sleeve are the employing blending and modifyings, melt extrude the method preparation, and equipment investment is few, and floor area is few, and production cost is low, and technology is simple, grasps easily, is well suited for applying at home.Because the present invention has the advantage of all many-sides, can predict, and will replace LLDPE, the HDPE protective cover material of prior art from now on, for the development of Communication in China cause contributes.
Provide embodiments of the invention below.
Embodiment 1
High density polyethylene 86.8%
Nucleator 0.1%
Melt viscosity modifier 5%
Higher fatty acid soap processing aid 0.5%
Low molecular weight polyethylene 2.5%
Carbon black master batch (50% content) 5%
[β-(and 3,5-di-t-butyl-4-hydroxyl
The base phenyl) propionic acid] defend tetrol ester 0.1% season
Wherein:
High density polyethylene is density: 0.953g/cm
3, melt index (MI): 0.4g/10min, pulling strengrth 21MPa, resisting environmental stress and cracking＞500hr, breaking elongation: more than 800%.
Low molecular weight polyethylene is density: 0.9g/cm
3, softening point: 101 ℃, mean molecular weight 2000.
Black masterbatch is: density: 1.3g/cm
3, carbon black mean grain size: 20nm, the carbon black weight content: 40%, black chromatic value: 94.
Embodiment 2
High density polyethylene 88.5%
Nucleator 0.1%
Melt viscosity modifier 3%
Higher fatty acid soap processing aid 0.3%
Low molecular weight polyethylene 3.0%
Carbon black master batch (50% content) 5%
Thio-2 acid dilaurate 0.1%
Wherein:
High density polyethylene is density: 0.953g/cm
3, melt index (MI): 0.4g/10min, pulling strengrth 21MPa, resisting environmental stress and cracking＞500hr, breaking elongation: 〉=800%.
Low molecular weight polyethylene is density: 0.9g/cm
3, softening point: 101 ℃, mean molecular weight 2000.
Black masterbatch is: density: 1.3g/cm
3, carbon black mean grain size: 20nm, content of carbon black: 40%, black chromatic value: 94.
Embodiment 3
High density polyethylene 88%
Nucleator 0.45%
Melt viscosity modifier 3.0%
Higher fatty acid soap processing aid 0.4%
Low molecular weight polyethylene 3.0%
Carbon black master batch (50% content) 5.0%
[β-(and 3,5-di-t-butyl-4-hydroxyl
The base phenyl) propionic acid] defend tetrol ester 0.08% season
Thio-2 acid dilaurate 0.07%
Wherein:
High density polyethylene is density: 0.953g/cm
3, melt index (MI): 0.4g/10min, pulling strengrth 21MPa, resisting environmental stress and cracking＞500hr, breaking elongation: more than 800%
Low molecular weight polyethylene is density: 0.9g/cm
3, softening point: 101 ℃, mean molecular weight 2000
Black masterbatch is: density: 1.3g/cm
3, carbon black mean grain size: 20nm, content of carbon black: 40%, black chromatic value: 94.
Subordinate list 1
| Sequence number | Project | GB15065-94 index (GH) | HDPE protective cover material of the present invention |
| 1 2 3 4 5 6 7 8 9 10 11 | Melt index (MI) g/10min density, g/cm3Hot strength, the MPa elongation at break, the % brittle temperature, ℃ resisting environmental stress and cracking, FO, 200 ℃ of oxidation induction periods of h, min content of carbon black carbon black dispension degree divides carbon black absorption coefficient dielectric constant | ≤0.5 0.950～0.978 ≥20 ≥650 ≤-76 ≥500 ≥30 2.60±0.25 ≥6 ≥400 ≤2.80 | 0.48 0.958 20.6 800 ≤-76 1000 35 2.60±0.25 6 438 2.65 |
Subordinate list 2
Claims (7)
1. a high density polyethylene communication cable, protecting sleeve of optical cable, its feature comprises high density polyethylene, melt viscosity modifier, higher fatty acid soap processing aid, carbon black master batch and nucleator, percentage by weight is:
High density polyethylene 86.8～88.5%
Melt viscosity modifier 3.0～5.0%
Higher fatty acid soap processing aid 0.3～0.5%
Carbon black master batch 5.0%
Nucleator 0.1～0.45%.
2. high density polyethylene communication cable according to claim 1, protecting sleeve of optical cable is characterized in that also containing percentage by weight and are 2.5～3.0% low molecular weight polyethylene.
3. high density polyethylene communication cable according to claim 1 and 2, protecting sleeve of optical cable is characterized in that also containing percentage by weight and are 0.10～0.15% antioxidant.
4. high density polyethylene communication cable according to claim 3, protecting sleeve of optical cable, the density that it is characterized in that high density polyethylene is 0.953g/cm
3, melt index (MI) is 0.4g/10min.
5. high density polyethylene communication cable according to claim 3, protecting sleeve of optical cable, the mean molecular weight that it is characterized in that low molecular weight polyethylene is 2000, softening point temperature is 101 ℃.
6. high density polyethylene communication cable according to claim 3, protecting sleeve of optical cable, the particle diameter that it is characterized in that the carbon black master batch is 20nm, and carbon black weight content number percent is 40%, and the black chromatic value is 94.
7. high density polyethylene communication cable according to claim 3, protecting sleeve of optical cable is characterized in that nucleator is organic class nucleator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111977A CN1079541C (en) | 1998-04-24 | 1998-04-24 | Communication cable, optical cable protecting casing material of high-density polyethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111977A CN1079541C (en) | 1998-04-24 | 1998-04-24 | Communication cable, optical cable protecting casing material of high-density polyethylene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1234515A CN1234515A (en) | 1999-11-10 |
| CN1079541C true CN1079541C (en) | 2002-02-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98111977A Expired - Fee Related CN1079541C (en) | 1998-04-24 | 1998-04-24 | Communication cable, optical cable protecting casing material of high-density polyethylene |
Country Status (1)
| Country | Link |
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| CN (1) | CN1079541C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030936B (en) * | 2009-09-25 | 2012-07-04 | 中国石油化工股份有限公司 | Processing agent for polyolefin and alloy thereof, preparation method and application thereof |
| CN101701093B (en) * | 2009-11-30 | 2011-09-07 | 苏州亨利通信材料有限公司 | Special material for color identification of special color polyolefin optical cable |
| CN102122044A (en) * | 2010-10-13 | 2011-07-13 | 成都亨通光通信有限公司 | Sheath material for optical cable |
| CN102453274B (en) * | 2010-10-25 | 2013-08-14 | 中国石油化工股份有限公司 | Viscosity reducing master batch for polyolefin and preparation method and application thereof |
| CN102775666B (en) * | 2012-07-05 | 2016-08-10 | 哈尔滨理工大学 | All dielectric self-supporting electric power optical cable high density polyethylene (HDPE) protective cover material and production method |
| CN103304879B (en) * | 2013-06-25 | 2015-09-23 | 张宇 | A kind of HDPE cable jacket material |
| CN105469867B (en) * | 2015-12-16 | 2018-04-13 | 江苏亨通线缆科技有限公司 | Wear-resistant special cable used for rolling stock |
| CN105551585B (en) * | 2015-12-16 | 2018-01-09 | 江苏亨通线缆科技有限公司 | High-intensity high combustion locomotive cable |
| CN108059757A (en) * | 2017-12-31 | 2018-05-22 | 江苏中天科技股份有限公司 | A kind of cable sheath material of anti-evagination |
| CN110016172A (en) * | 2018-01-08 | 2019-07-16 | 中国石油化工股份有限公司 | The preparation method of cable jacket material high-density polyethylene composition and High-density polyethylene cable sheath material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4374227A (en) * | 1981-05-15 | 1983-02-15 | Union Carbide Corporation | Extruded gloss improvement in pipe blends with low pressure low density polyethylene |
| US4680328A (en) * | 1984-11-29 | 1987-07-14 | The Dow Chemical Company | Insect resistant polyethylene composition suitable for wire and cable applications |
| CN1155153A (en) * | 1996-11-25 | 1997-07-23 | 四川联合大学 | Special material for outer protective sleeve of communication cable and optical cable |
-
1998
- 1998-04-24 CN CN98111977A patent/CN1079541C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4374227A (en) * | 1981-05-15 | 1983-02-15 | Union Carbide Corporation | Extruded gloss improvement in pipe blends with low pressure low density polyethylene |
| US4680328A (en) * | 1984-11-29 | 1987-07-14 | The Dow Chemical Company | Insect resistant polyethylene composition suitable for wire and cable applications |
| CN1155153A (en) * | 1996-11-25 | 1997-07-23 | 四川联合大学 | Special material for outer protective sleeve of communication cable and optical cable |
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| Publication number | Publication date |
|---|---|
| CN1234515A (en) | 1999-11-10 |
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