CN1074157C - Special material for outer protective sleeve of communication cable and optical cable - Google Patents
Special material for outer protective sleeve of communication cable and optical cable Download PDFInfo
- Publication number
- CN1074157C CN1074157C CN96117796A CN96117796A CN1074157C CN 1074157 C CN1074157 C CN 1074157C CN 96117796 A CN96117796 A CN 96117796A CN 96117796 A CN96117796 A CN 96117796A CN 1074157 C CN1074157 C CN 1074157C
- Authority
- CN
- China
- Prior art keywords
- master batch
- carbon black
- protective sleeve
- outer protective
- special material
- 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.)
- Expired - Fee Related
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
Abstract
The present invention relates to a special material for outer sheaths of communication cables and optical cables. The special material mainly comprises linear low-density polyethylene (LLDPE), a small amount of carbon black, a polyolefin containing fluorine processing aid, a low-molecular weight polyethylene processing aid and a minute quantity of antioxidant, wherein the polyolefin containing fluorine processing aid and the low-molecular weight polyethylene processing aid are used for improving the processing property of the LLDPE. The special sheath material prepared by the present invention has the following advantages: environmental stress cracking reaches more than 500 hours; the design requirements for the service lives of the cables and the optical cables of 30 years can be met; compared with a low-density polyethylene (LDPE) sheath material of the prior art, RMB1000 can be saved for every ton of materials. Moreover, the present invention also has the advantages of simple technology, easy control and capability of substituting the LDPE sheath material of the prior art.
Description
The present invention relates to the proprietary material of outer protective sleeve of communication cable and optical cable, belonging to the LLDPE is the special material for outer protective sleeve of communication cable and optical cable of main component.
The special material for outer protective sleeve of communication cable and optical cable of prior art, its key component are low density polyethylene (LDPE) and a spot of carbon black or carbon black master batch.Because performance extreme differences such as low density polyethylene (LDPE) resisting environmental stress and cracking, thereby wherein also must add EVA high polymers such as (ethene---acetate ethylene copolymers) to improve performance.The price of high polymers such as EVA generally all compares expensive.The cost of sheath proprietary material is along with the increase of EVA addition improves greatly, and the addition deficiency of EVA, sheath proprietary material environmental stress cracking resistance does not have tangible improvement again, even and the high polymers such as EVA of adding capacity, the improvement of performances such as its resisting environmental stress and cracking also is limited.The low density polyethylene (LDPE) special material for outer protective sleeve of communication cable and optical cable of prior art, by domestic and international current techique testing standard (YD322-84, U.S. REAPE-200) carries out the resisting environmental stress and cracking test, its resisting environmental stress and cracking life-span has only 96 hours, be not less than 500 hours requirement well below resisting environmental stress and cracking life-span of national technical standard (GB15065-94) defined, be difficult to guarantee 30 years useful life of communication cable and optical cable.At present, all both at home and abroad is the requirement that the cable and optical cable sheath proprietary material of main component all can not satisfy These parameters with the low density polyethylene (LDPE).The DFDG-6059BK protective cover material of U.S.'s union carbide corporation production can satisfy above-mentioned technical requirement, but retrieves the technological document less than relevant this proprietary material on disclosed publication.Disclosing in the prior art document with the LLDPE is the protective cover material of base resin, but needs to add the modified resin of significant proportion.In addition, on macromolecule new material market, many companies are arranged, claim it to have the performance of improving the LLDPE processability at the fluorine-containing auxiliary agent master batch of promotion polyolefin.
The purpose of this invention is to provide a kind of resisting environmental stress and cracking life-span reaches 500 hours, the special material for outer protective sleeve of communication cable and optical cable that price is low again.
The objective of the invention is by taking following technical measures to realize:
The composition of special material for outer protective sleeve of communication cable and optical cable contains LLDPE, the fluorine-containing auxiliary agent master batch of polyolefin, carbon black master batch and low molecular weight polyethylene, and the shared percentage by weight of various compositions is:
LLDPE 85～95%
The fluorine-containing auxiliary agent master batch 1.0～5.0% of polyolefin
Carbon black master batch 4.0～10.0%
Low molecular weight polyethylene 0.5～5.0%.
In such scheme, also can add weight content as antioxidant and be 0.075～0.10% four [β-(3,5-di-t-butyl-4 '-hydroxy phenyl) propionic acid] defend tetrol fat season or/and 0.05～0.10% dilauryl thiodipropionate, these two kinds of antioxidant can be distinguished adding separately, also can add in the lump.
LLDPE described in the such scheme preferably density at 0.916～0.920g/cm
3, melt index (MI) is in 1.0～2.0g/min scope.
The fluorine-containing auxiliary agent master batch of polyolefin described in the such scheme preferably density at 0.918～0.921g/cm
3, melt index (MI) is in 4.5～8.5g/10min scope.
Preferably mean molecule quantity is 1500～5000 for low molecular weight polyethylene described in the such scheme, and softening point is in 101～110 ℃ of scopes.
Preferably the average grain diameter of carbon black is at 20～60nm for the master batch of carbon black described in the such scheme, and the carbon black weight content is 30～50%, in black chromatic value 〉=94 scopes.
Fluorine-containing auxiliary agent master batch of component polyolefin in the such scheme and carbon black master batch all both can be the master batch forms, also can not be the master batch forms, and promptly directly with the fluorine-containing auxiliary agent of polyolefin, carbon black is a material feedstock.When not adopting the master batch form, its composition percentage by weight will correspondingly reduce.
As the LLDPE of sheath proprietary material main component, every technical performance is good, and particularly environmental stress cracking resistance is fabulous, but processing performance of linear low density polyethylene is poor, when melting is extruded, the melt fragmentation takes place easily, make extrudate rough, be the sharkskin shape.Thereby can not directly be used as the communication cable and optical cable protective cover material.One of key of the present invention is to have filtered out the processing aid that can very improve processing performance of linear low density polyethylene effectively, the i.e. fluorine-containing processing aid of polyolefin.Low molecular weight polyethylene also has good effect for the processing characteristics of improving LLDPE.It also is a kind of good processing aid.Add fluorine-containing processing aid of polyolefin and low molecular weight polyethylene simultaneously, will be better to the improvement of processing performance of linear low density polyethylene.Low molecular weight polyethylene manufacturer is more, and the fluorine-containing processing aid production unit of polyolefin has the 3M company and the Sichuan Union University macromolecule research institute of the U.S..It is that Sichuan Union University macromolecule research institute produces that industrial experiment of the present invention is produced used processing aid.The present invention mixes above-mentioned processing aid in LLDPE, very improved the processing characteristics of LLDPE effectively, promptly eliminated the broken phenomenon of melt in the LLDPE extrusion, and the long-pending grain phenomenon of extrusion neck ring mold, reduced the extrusion pressure of processing temperature and head, improve rate of extrusion and extrudate surface smoothness, solved the key technical problem of processing performance of linear low density polyethylene difference.By the LLDPE outer protective sleeve of communication cable and optical cable material that the present invention makes, its technical performance and application processing characteristics are all very excellent.Of the present invention open, outer protective sleeve of communication cable and optical cable material technology has been pushed ahead major step.
Subordinate list 1 is the low density polyethylene (LDPE) protective cover material performance comparison of protective cover material of the present invention and prior art.Measurement data in the table 1 has fully shown the excellent properties that the present invention's low density polyethylene (LDPE) protective cover material is compared to prior art had.The present invention not only environmental stress cracking resistance is very outstanding, the other technologies performance index, and as hot strength, elongation at break, the key technical indexes such as non-oxidizability also all are better than the protective cover material of prior art far away.
LLDPE special material for outer protective sleeve of communication cable and optical cable disclosed by the invention, be to adopt blending and modifying, melt extrude the method preparation, equipment investment is few, floor space is little, production cost is low, and price per ton is than low 1000 RMBs of low density polyethylene (LDPE) protective cover material of prior art, and technology is simple, grasp easily, be well suited for applying at home.Because the present invention has the advantage of all many-sides, can predict, in the not long from now on time, will replace prior art low density polyethylene (LDPE) protective cover material.
Provide embodiments of the invention below.
Embodiment 1
Sheath proprietary material weight percentages of components is:
LLDPE 86.5%
The fluorine-containing auxiliary agent master batch 2.4% of polyolefin
Low molecular weight polyethylene 2.5%
Carbon black master batch 8.5%
Four [β-(and 3,5-di-t-butyl-4 '-hydroxy phenyl) propionic acid] defend tetrol ester 0.1% season
Wherein:
LLDPE is density: 0.916g/cm
3, melt index (MI): 1.0g/min, hot strength: 14.0MPa, environment stress cracking: 500 hours, elongation at break: 850%;
The fluorine-containing auxiliary agent master batch of polyolefin is density: 0.918g/cm
3, melt index (MI): 5.5g/10min, elongation at break: 550%, hot strength: 11.0MPa;
Low molecular weight polyethylene is density: 0.90g/cm
3, softening point: 101 ℃, mean molecule quantity 2000;
The carbon black master batch is density: 1.2g/cm
3, carbon black average grain diameter 20nm, the carbon black weight content: 40%, black chromatic value: 94.
Embodiment 2
Sheath proprietary material weight percentages of components is:
LLDPE 90%
The fluorine-containing auxiliary agent master batch 3.0% of polyolefin
Low molecular weight polyethylene 0.9%
Carbon black master batch 6.0%
Dilauryl thiodipropionate 0.10%
Wherein:
LLDPE is density: 0.920g/cm
3, melt index (MI): 2.0g/10min, hot strength: 16.0MPa, elongation at break: 850%, environment stress cracking: 600 hours;
Polyolefin contains oxygen auxiliary agent master batch and is density: 0.921g/cm
3, melt index (MI): 7.5g/10min, hot strength 11.0MPa, percentage elongation is drawn in fracture: 550%;
Low molecular weight polyethylene is density: 0.90g/cm
3, softening point: 110 ℃, mean molecule quantity 4000;
The carbon black master batch is density: 1.2g/cm
3, carbon black average grain diameter: 60nm, the carbon black weight content: 50%, black chromatic value: 94.
Embodiment 3
Sheath proprietary material weight percentages of components is:
LLDPE 85%
The fluorine-containing auxiliary agent master batch 4.0% of polyolefin
Low molecular polyethylene 3.86%
Carbon black master batch 9.0%
Four [β-(and 3,5-di-t-butyl-4 '-hydroxy phenyl) propionic acid] defend tetrol fat 0.06% season
Dilauryl thiodipropionate 0.080%
Wherein:
LLDPE is density: 0.918g/cm
3, melt index (MI): 1.5g/min, hot strength 15.0MPa, the disconnected percentage elongation of attacking: 850%, environment stress cracking: 550 hours;
The fluorine-containing auxiliary agent master batch of polyolefin is density: 0.920g/cm
3, melt index (MI): 6.0g/min, hot strength: 11.0MPa, elongation at break 550%;
Low molecular weight polyethylene is density: 0.90g/cm
3, softening point: 105 ℃, mean molecule quantity: 3000;
The carbon black master batch is density: 1.2g/cm
3, carbon black average grain diameter 40nm, carbon black weight content 40%, black chromatic value: 94.
Subordinate list 1
| Sequence number | Project | Performance index | |
| LLDPE protective cover material of the present invention | Prior art low density polyethylene (LDPE) protective cover material | ||
| 1 2 3 4 5 6 7 8 9 10 11 | Melt index (MI), g/10min density, g/cm 3Hot strength, the MPa elongation at break, % low-temperature impact brittle temperature, ℃ 200 ℃ of oxidation induction periods of resisting environmental stress and cracking FO.h, the min content of carbon black, the % carbon black dispension degree divides carbon black absorption coefficient dielectric constant | ≤2.0 0.920～0.945 ≥14.0 ≥600 ≤-76 ≥500 ≥30 2.60±0.25 ≥6 ≥400 ≤2.80 | ≤0.65 0.920～0.940 ≥12.5 ≥500 ≤-76 ≥96 —— 2.35～2.85 —— ≥400 ≤2.75 |
Claims (6)
1. a special material for outer protective sleeve of communication cable and optical cable is characterized in that containing LLDPE, fluorine-containing auxiliary agent master batch of polyolefin and carbon black master batch, and percentage by weight is:
LLDPE 85～95%
The fluorine-containing auxiliary agent master batch 1.0～5.0% of polyolefin
Carbon black master batch 4.0～10.0%
Low molecular weight polyethylene 0.5～5.0%.
2. special material for outer protective sleeve of communication cable and optical cable according to claim 1, it is characterized in that also containing weight content as antioxidant and be 0.075～0.10% four [β-(3,5-di-t-butyl-4 '-hydroxy phenyl) propionic acid] defend tetrol fat season or/and 0.05～0.10% dilauryl thiodipropionate.
3. special material for outer protective sleeve of communication cable and optical cable according to claim 1 and 2, the density that it is characterized in that said LLDPE is 0.916～0.920g/cm
3, melt index (MI) is 1.0～2.0g/10min.
4. special material for outer protective sleeve of communication cable and optical cable according to claim 1 and 2, the density that it is characterized in that the fluorine-containing auxiliary agent master batch of said polyolefin is 0.918～0.921g/cm
3, melt index (MI) is 4.5～8.5g/10min.
5. special material for outer protective sleeve of communication cable and optical cable according to claim 1 and 2, the mean molecule quantity that it is characterized in that said low molecular weight polyethylene is 1500～5000, softening point temperature is 101～110 ℃.
6. special material for outer protective sleeve of communication cable and optical cable according to claim 1 and 2 is characterized in that the carbon black average grain diameter in the said carbon black master batch is 20～60nm, and the carbon black weight content is 30～50%, black chromatic value 〉=94.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96117796A CN1074157C (en) | 1996-11-25 | 1996-11-25 | Special material for outer protective sleeve of communication cable and optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96117796A CN1074157C (en) | 1996-11-25 | 1996-11-25 | Special material for outer protective sleeve of communication cable and optical cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1155153A CN1155153A (en) | 1997-07-23 |
| CN1074157C true CN1074157C (en) | 2001-10-31 |
Family
ID=5124615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96117796A Expired - Fee Related CN1074157C (en) | 1996-11-25 | 1996-11-25 | Special material for outer protective sleeve of communication cable and optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1074157C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079541C (en) * | 1998-04-24 | 2002-02-20 | 四川联合大学 | Communication cable, optical cable protecting casing material of high-density polyethylene |
| 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 |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063376A (en) * | 1992-01-04 | 1992-08-05 | 中国科学院近代物理研究所 | The prescription of polyolefin insulating sheath of overhead cable |
| CN1074779A (en) * | 1992-10-29 | 1993-07-28 | 齐鲁石油化工公司研究院 | Special material for high-quality cable sheath and preparation method thereof |
| CN1124258A (en) * | 1994-12-09 | 1996-06-12 | 天水电缆材料厂 | Black polyvinyl cable material and producing technology |
-
1996
- 1996-11-25 CN CN96117796A patent/CN1074157C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063376A (en) * | 1992-01-04 | 1992-08-05 | 中国科学院近代物理研究所 | The prescription of polyolefin insulating sheath of overhead cable |
| CN1074779A (en) * | 1992-10-29 | 1993-07-28 | 齐鲁石油化工公司研究院 | Special material for high-quality cable sheath and preparation method thereof |
| CN1124258A (en) * | 1994-12-09 | 1996-06-12 | 天水电缆材料厂 | Black polyvinyl cable material and producing technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1155153A (en) | 1997-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2935453B1 (en) | Polyolefin-based compound for cable jacket with reduced shrinkage and enhanced processability | |
| CN101221836B (en) | Low temperature resistant anti-crack rubber sleeve flexible cable used for wind power generation | |
| KR101414382B1 (en) | Vulcanizable copolymer semiconductive shield compositions | |
| KR101985611B1 (en) | Polyolefin Resin Composition for Insulating Power Cables | |
| KR102003567B1 (en) | Power cable | |
| CN104987605B (en) | A kind of Oil resistance thermoplastic elastomer and preparation method thereof | |
| US6525119B2 (en) | Cable semiconductive shield compositions | |
| CN1079541C (en) | Communication cable, optical cable protecting casing material of high-density polyethylene | |
| EP0635041B1 (en) | Polyoxymethylene compositions containing at least one encapsulated nucleant | |
| EP2311049B1 (en) | Improved hard grade epr insulation compositions | |
| CN112759817A (en) | Low-shrinkage halogen-free flame-retardant polyethylene composition and preparation method and application thereof | |
| CN102731919A (en) | High-speed-extruding oil-proof wear-resisting irradiation crosslinking rubber material and preparation method thereof | |
| CN1074157C (en) | Special material for outer protective sleeve of communication cable and optical cable | |
| CN112457552B (en) | Weather-resistant low-density polyethylene insulating material and preparation method thereof | |
| CA2831301A1 (en) | Semiconductive shield composition with improved strippability | |
| CN116675937B (en) | Aging-resistant insulating polyvinyl chloride elastomer composition and preparation method and application thereof | |
| US9062175B2 (en) | Acetylene black semiconducting shield material with improved processing | |
| CN1807499A (en) | Halogen-free combustion-proof polypropylene high-speed abrasion-proof insulating material for auto initial line | |
| KR100760823B1 (en) | Rubber composition for tire tread | |
| EP4299664A1 (en) | Powder-type additive comprising cross-linked resin, and resin composition comprising same | |
| CN107709443B (en) | Cable insulation composition comprising a sulfur-containing second antioxidant | |
| CN112521675A (en) | Insulating cold-resistant cable material and preparation method and application thereof | |
| CN1223004A (en) | Tree resistant cable | |
| KR20190087345A (en) | Power cable | |
| CN114685874B (en) | Semiconductive polyolefin sheath material for submarine cable and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |