GB2059097A - Optical cable having plasticised polyvinyl chloride sheath - Google Patents
Optical cable having plasticised polyvinyl chloride sheath Download PDFInfo
- Publication number
- GB2059097A GB2059097A GB8024733A GB8024733A GB2059097A GB 2059097 A GB2059097 A GB 2059097A GB 8024733 A GB8024733 A GB 8024733A GB 8024733 A GB8024733 A GB 8024733A GB 2059097 A GB2059097 A GB 2059097A
- Authority
- GB
- United Kingdom
- Prior art keywords
- parts
- weight
- pvc
- cable
- compound
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims description 45
- 239000004800 polyvinyl chloride Substances 0.000 title claims description 27
- 229920000915 polyvinyl chloride Polymers 0.000 title claims description 25
- VJHINFRRDQUWOJ-UHFFFAOYSA-N dioctyl sebacate Chemical compound CCCCC(CC)COC(=O)CCCCCCCCC(=O)OCC(CC)CCCC VJHINFRRDQUWOJ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 150000001875 compounds Chemical class 0.000 claims abstract description 18
- 239000004014 plasticizer Substances 0.000 claims abstract description 11
- 239000013307 optical fiber Substances 0.000 claims abstract description 3
- 239000000945 filler Substances 0.000 claims description 12
- 239000003381 stabilizer Substances 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 6
- 229910021653 sulphate ion Inorganic materials 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 4
- 229920012485 Plasticized Polyvinyl chloride Polymers 0.000 claims description 2
- 239000000969 carrier Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 238000005336 cracking Methods 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000000049 pigment Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000007858 starting material Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
-
- 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
Landscapes
- 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)
Abstract
An optical fibre cable is sheathed with a stabilized PVC compound plasticized with a di-(2-ethylhexyl) sebacate (DOS) plasticizer at a weight ration of 100 parts PVC to 45-70 parts DOS. The PVC compound remains flexible at temperatures down to 50 DEG below zero.
Description
SPECIFICATION
Optical cable
This invention relates to an optical cable with a cable core containing optical fibres, and a cable sleeve containing a cable sheathing of a stabilized polyviny Ichloride (PVC)-compound.
Optical cables are known in a variety of embodiments and, in the fields of transmission engineering serve the transmission of optical signals. In cases where optical cables are laid out in the open air and are required to be flexible, increased requirements are to be placed on the optical cable owing to environmental conditions.
It is the object of the invention, therefore, to provide an optical cable which is sufficiently flexible within a wide range of temperature.
According to the invention there is provided an optical cable, including a cable core containing optical fibres, and a cable sleeve containing a cable sheathing of a stabilized polyvinylchloride (PVC)compound, wherein the PVC-compound of the cable sheathing contains a di-(2-ethylhexyl) sebacate (DOS) plasticizer at a ratio of 100 parts by weight
PVC to 45-70 parts by weight DOS.
At this point it is to be noted that it is known per se to use a DOS-plasticizer for PVC ("Kunst-stoffe",
Vol.60, 1970, No. 5, pp. 301-308).
An optical cable sheathed with such a material can be used at temperatures down to 50 below zero and yet does not loose its flexibility.
In this way it is possible to obtain an optical cable which can also be laid out in the open air, e.g., the construction of an optical transmission system, at any time in a freely movable manner.
It is of advantage to add to the PVC-compound for the cable sheathing a filler (filling agent) and a stabilizer for permitting an improved processing. As a filler it is of advantage to use a surface-treated chalk, with 10-50 parts by weight thereof being added to the aforementioned compound. As a stabilizer for avoiding a decomposition of the PVC there is preferably to be used a basic sulphate of lead, i.e. 3-8 parts by weight should be added to the aforementioned compound.
A compound for a cable sheathing consisting of a
PVC-compound for use with an optical cable, causing a flexibility of the optical cable down to 40"C below zero, which is well suitable for processing, and which causes reasonable costs, is characterized by the following statements: 100 parts by weight PVC, 60 parts by weight DOS, 20 parts by weight surface-treated chalk and 3-5 parts by weight stabilizer.
In preparing the PVC-compound for the cable sheathing of an optical cable which also remains flexible in the cold the following procedure may be employed:
After weighing, the starting materials existing in powder form, are fed into a mixer. To 100 parts by weight PVC there are added 20 parts by weight surface-treated chalk and 3-5 parts by weight basic sulphate of lead in combination with a lubricant. In cases where the cable sheathing is to have a certain colour, there are still to be added the corresponding pigments. After these materials have been well mixed, there are added 60 parts by weight of the liquid plasticiser DOS, and mixing is continued until the compound has reached a temperature of approximately 80"C. The compound is then ejected and fed into a plastificator.In the plastificatorthe compound is compressed and gelatinized and may then, during ejection, and with the aid of a rotating knife, be converted into a granulate. The thus obtained
PVC-compound may now be further processed in an extruder for resulting in the cable sheathing.
As the plasticized PVC is flexible at low temperature; optical fibre cables sheathed in this material can be installed at sub-zero temperatures without risk of cracking of the sheathing. Thus, the cables can if necessary be installed on poles or on carriers along railway embankments as the sheathing material will allow wind flexure without the risk of damage.
1. An optical cable, including a cable core containing optical fibres, and a cable sleeve containing a cable sheathing of a stabilized polyvinylchloride (PVC)-compound, wherein the PVC-compound of the cable sheathing contains a di-(2-ethylhexyl) sebacate (DOS) plasticizer at a ratio of 100 parts by weight
PVC to 45-70 parts by weight DOS.
2. An optical cable as claimed in claim 1, wherein said PVC-compound contains as a filling agent a surface-treated chalk and, as a stabilizer, a basic sulphate of lead in combination with a lubricant at a ratio of 100 parts by weight PVC to 45-70 parts by weight plasticizer DOS to 10-50 parts by weight filling agent to 3-8 parts by weight stabilizer.
3. An optical cable as claimed in claim 1 or 2, wherein said compound contains 100 parts by weight PVC, 60 parts by weight DOS, 20 parts by weight filling agent and 3-5 parts by weight stabilizer.
4. A PVC sheathed optical cable substantially as hereinbefore described.
5. An optical transmission system provided with cables as claimed in any one of claims 1 to 4.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (5)
1. An optical cable, including a cable core containing optical fibres, and a cable sleeve containing a cable sheathing of a stabilized polyvinylchloride (PVC)-compound, wherein the PVC-compound of the cable sheathing contains a di-(2-ethylhexyl) sebacate (DOS) plasticizer at a ratio of 100 parts by weight
PVC to 45-70 parts by weight DOS.
2. An optical cable as claimed in claim 1, wherein said PVC-compound contains as a filling agent a surface-treated chalk and, as a stabilizer, a basic sulphate of lead in combination with a lubricant at a ratio of 100 parts by weight PVC to 45-70 parts by weight plasticizer DOS to 10-50 parts by weight filling agent to 3-8 parts by weight stabilizer.
3. An optical cable as claimed in claim 1 or 2, wherein said compound contains 100 parts by weight PVC, 60 parts by weight DOS, 20 parts by weight filling agent and 3-5 parts by weight stabilizer.
4. A PVC sheathed optical cable substantially as hereinbefore described.
5. An optical transmission system provided with cables as claimed in any one of claims 1 to 4.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792932497 DE2932497A1 (en) | 1979-08-10 | 1979-08-10 | OPTICAL CABLE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2059097A true GB2059097A (en) | 1981-04-15 |
| GB2059097B GB2059097B (en) | 1983-06-02 |
Family
ID=6078166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8024733A Expired GB2059097B (en) | 1979-08-10 | 1980-07-29 | Optical cable having plasticised polyvinyl chloride sheath |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2932497A1 (en) |
| GB (1) | GB2059097B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994027174A1 (en) * | 1993-05-13 | 1994-11-24 | Siemens Aktiengesellschaft | Filling compound for an optical transmission element with at least one optical waveguide |
| RU2172007C2 (en) * | 1995-12-11 | 2001-08-10 | Сименс Акциенгезелльшафт | Fibre-optic cable with filling compound and method for its manufacture |
| CN104558912A (en) * | 2013-10-22 | 2015-04-29 | 宁夏金黄河塑业有限责任公司 | Tensile transparent PVC (Polyvinyl Chloride) cable sheath |
| CN104558918A (en) * | 2013-10-22 | 2015-04-29 | 宁夏金黄河塑业有限责任公司 | Environment-friendly PVC cable sheath capable of resisting flame at 105 DEG C special for flexible optical cable |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110387095A (en) * | 2019-07-24 | 2019-10-29 | 南京华脉科技股份有限公司 | A kind of transparent leading in cable |
-
1979
- 1979-08-10 DE DE19792932497 patent/DE2932497A1/en not_active Withdrawn
-
1980
- 1980-07-29 GB GB8024733A patent/GB2059097B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994027174A1 (en) * | 1993-05-13 | 1994-11-24 | Siemens Aktiengesellschaft | Filling compound for an optical transmission element with at least one optical waveguide |
| US5657410A (en) * | 1993-05-13 | 1997-08-12 | Siemens Aktiengesellschaft | Filler for an optical transmission element having at least one optical waveguide |
| AU682353B2 (en) * | 1993-05-13 | 1997-10-02 | Siemens Aktiengesellschaft | Filling compound for an optical transmission element with at least one optical waveguide |
| RU2172007C2 (en) * | 1995-12-11 | 2001-08-10 | Сименс Акциенгезелльшафт | Fibre-optic cable with filling compound and method for its manufacture |
| CN104558912A (en) * | 2013-10-22 | 2015-04-29 | 宁夏金黄河塑业有限责任公司 | Tensile transparent PVC (Polyvinyl Chloride) cable sheath |
| CN104558918A (en) * | 2013-10-22 | 2015-04-29 | 宁夏金黄河塑业有限责任公司 | Environment-friendly PVC cable sheath capable of resisting flame at 105 DEG C special for flexible optical cable |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2932497A1 (en) | 1981-02-26 |
| GB2059097B (en) | 1983-06-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |