EP1216273A1 - Materiau thermoplastique extrudable et micromodule de fibre fabrique a partir d'un tel materiau - Google Patents

Materiau thermoplastique extrudable et micromodule de fibre fabrique a partir d'un tel materiau

Info

Publication number
EP1216273A1
EP1216273A1 EP00962641A EP00962641A EP1216273A1 EP 1216273 A1 EP1216273 A1 EP 1216273A1 EP 00962641 A EP00962641 A EP 00962641A EP 00962641 A EP00962641 A EP 00962641A EP 1216273 A1 EP1216273 A1 EP 1216273A1
Authority
EP
European Patent Office
Prior art keywords
parts
material according
vinyl acetate
ethylene
polymer
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.)
Withdrawn
Application number
EP00962641A
Other languages
German (de)
English (en)
French (fr)
Inventor
Bertrand Ducroix
Daniel Bernier
Raymond Petrus
Bernard Poisson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Silec Cable SAS
Original Assignee
Sagem SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sagem SA filed Critical Sagem SA
Publication of EP1216273A1 publication Critical patent/EP1216273A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G02B6/4479—Manufacturing methods of optical cables
    • G02B6/4486—Protective covering
    • 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
    • C08L23/08—Copolymers of ethene
    • 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
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C08L23/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2300/00—Characterised by the use of unspecified polymers
    • C08J2300/22—Thermoplastic resins
    • 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
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
    • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials

Definitions

  • the present invention relates to an extrudable material making it possible to form thin films, comprising an olefinic polymer.
  • the invention finds a particularly important, although not exclusive, application in the constitution of sheaths of sheathed optical fiber micromodules incorporable in a cable such as that described in document EP-A-0 468 878 to which reference may be made.
  • micromodules having a bundle of optical fibers sheathed in mutual contact, enclosed with a sealing gel in an extruded support envelope, it is desirable to fulfill conditions which are in some contradictory measure. For example, we often look for both, especially in the case of the creation of micromodules:
  • an electrical insulating material comprising an alloy of at least partially crosslinked polymers, in particular containing an EVA (ethyl alkyl acetate) copolymer with more than 40% vinyl acetate, with inorganic fillers at a content sufficient to make the material flame retardant.
  • EVA ethyl alkyl acetate
  • the present invention aims in particular to provide an extrudable material in thin film representing a satisfactory compromise between the different results to be achieved.
  • the invention notably proposes for this purpose a thin film extrudable material, consisting of a composition containing at least one (possibly several) practically non-crosslinked thermoplastic olefin polymer and a content of fillers of between 25 to 65% by weight of the composition, said material in the undivided state having a tensile strength of between 6 and 20 Mpa and an elongation at break of between 50 and 300%.
  • the shore hardness of the material is advantageously between 35 and 55 D.
  • the choice of a Shore D hardness exceeding 35 makes it possible, when the material is used to form a micromodule sheath, to ensure satisfactory cylindricity and to avoid the so-called "straw" effect, formed by the formation of a brutal bend during the flexions necessary for making the connections.
  • the strippability is sufficient so as not to require the use of special tools.
  • the above minimum characteristics, in particular the tensile strength and the elongation at break avoid excessive brittleness of the material during handling. In particular, these minima allow manipulation during the manufacture of a cable or connections without excessive risk of damage.
  • the minimum filler content indicated above makes it possible to reduce the expansion and retraction of the materials during temperature variations which occur during the manufacture of a cable.
  • the presence of a sufficient content of fillers makes it possible to avoid the risk of bonding of the micromodules to each other, on sheathed fibers or on an external envelope.
  • the fillers will generally be mineral. It is possible in particular to use alumina (hydrated or not), chalk, kaolin, talc, silica, magnesium hydroxide and their mixtures. All these loads reduce the elongation at break and the expansion or retraction during temperature variations. In addition, they increase the thermal inertia and the heat capacity.
  • the maximum level of fillers envisaged above makes it possible to maintain the viscosity at a level compatible with thin film extrusion.
  • the olefin polymers which can be used are substantially the same as those commonly used at present.
  • the following products can be mentioned:
  • the second polymer is EVA, a compound having no more than 30% of vinyl acetate co-monomer will be used in order to maintain sufficient hardness and mechanical characteristics.
  • EBA, EEA or EMA have properties close to EVA.
  • EPR and EPR have properties close to EVA.
  • EPDM will be used with sufficiently high levels of ethylene to prevent them from having properties that approximate those of an elastomer.
  • the extrudable material will generally additionally contain plasticizers of low content, not exceeding a few percent by weight, such as aliphatic oils or phthalates (for example di-octyl or didecyl phthalate), adipates, trimellitates , etc.
  • plasticizers of low content such as aliphatic oils or phthalates (for example di-octyl or didecyl phthalate), adipates, trimellitates , etc.
  • silanes or aminosilanes will be added, such as:
  • silanes strengthen the bond between the fillers and the polymer. In the absence of crosslinking agent, the silane does not risk causing crosslinking which, moreover, would not be possible if the material were used to form optical fiber sheaths, the temperatures required for crosslinking not being then not reached during extrusion.
  • the invention also provides an optical fiber micromodule comprising a bundle of optical fibers and a sheath surrounding the bundle in a thin film of an extrudable material, characterized in that the sheath is made up of a composition containing a thermoplastic olefin polymer and a charge rate between 25 to 65% by weight of the composition, said material in the undivided state having a tensile strength of between 6 and 20 Mpa and an elongation at break of between 50 and 300%.
  • the following description refers to the single figure which shows a micromodule in a deformed state which it is likely to take when it is pressed against other micromodules by an external envelope.
  • the micromodule comprises several individually sheathed optical fibers 10 contained in a sheath 12 which must be easily tearable to allow the stripping of the ends of the fibers for connections.
  • This sheath 12 is generally formed by extrusion on the bundle of optical fibers 10 during the drawing of the latter and then takes an approximately circular shape when the bundle of fibers itself has a periphery whose shape does not deviate too much from the circle. circumscribed.
  • the sheath encloses the fibers and is indeed applied against them. Inside a cable, the pressure of the micromodules against each other can deform their cross-section and cause it, for example, to that illustrated.
  • the control material consists of polyethylene having a nominal density of 0.92 and a "melt flow index" of 0.3 g / 10 min at 190 ° C, under a pressure of 21.6 N. This material was used to form the sheath of a micromodule, by extrusion on a bundle of four optical fibers.
  • the sheath 12 formed had a diameter of 1 mm and a thickness of 0.12 mm. Extrusion is done without difficulty and the sheath obtained is well cylindrical.
  • composition comprising, by weight:
  • additives antioxidants, silane, lubricant
  • the ingredients are mixed for 10 minutes, up to 160 ° C. After calendering on a roller mixer, the material is cut, then molded at 180 ° C under pressure, in the form of plates making it possible to carry out measurements characterizing the material.
  • the composition was used to form micromodules. For this, it was put in the form of granules which are introduced into an extruder 45 mm in diameter, and 24 diameters in length. Extrusion temperatures are between 130 and 165 ° C, from the feed hopper to the extrusion head.
  • the first was a shaping at a speed of 100m / min, to obtain a tube of 0.90 mm in external diameter, and 0.12 mm in radial thickness.
  • the shaping was identical except that we introduce through the head of the extruder 4 colored optical fibers, and that we simultaneously inject a sealing gel to form a module which, after cooling of the extruded material, is collected in a tank where it freely winds up flat.
  • the composition of the material is identical to Example 1, except that the filler based on hydrated alumina is replaced by a filler based on calcium carbonate.
  • the mixing is carried out under the same conditions, and a micromodule with a diameter of 0.85 mm and a thickness of 0.11 mm is extruded at 100 m / min.
  • the characteristics below show how modules with a correct chemical resistance are obtained with such a formulation, despite the small thickness of the sheath of the module.
  • Example 2 A formulation identical to Example 1 is produced, except that the alumina-based filler is replaced by a kaolinic filler, and its concentration lowered to 65 parts.
  • the paraffinic plasticizer is replaced by an oil of isononyl adipate type.
  • the various ingredients are introduced in an internal mixer, mixed up to approximately 160 ° C., and granules.
  • the characteristics of the material on the plate are as follows:
  • the sealing gel is the "Macroplast CF 300" of the company

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Artificial Filaments (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
EP00962641A 1999-09-17 2000-09-14 Materiau thermoplastique extrudable et micromodule de fibre fabrique a partir d'un tel materiau Withdrawn EP1216273A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9911649 1999-09-17
FR9911649A FR2798665B1 (fr) 1999-09-17 1999-09-17 Materiau thermoplastique extrudable et micromodule de fibre fabrique a partir d'un tel materiau
PCT/FR2000/002545 WO2001021706A1 (fr) 1999-09-17 2000-09-14 Materiau thermoplastique extrudable et micromodule de fibre fabrique a partir d'un tel materiau

Publications (1)

Publication Number Publication Date
EP1216273A1 true EP1216273A1 (fr) 2002-06-26

Family

ID=9549965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00962641A Withdrawn EP1216273A1 (fr) 1999-09-17 2000-09-14 Materiau thermoplastique extrudable et micromodule de fibre fabrique a partir d'un tel materiau

Country Status (11)

Country Link
EP (1) EP1216273A1 (ja)
JP (1) JP2003510394A (ja)
KR (1) KR20020053812A (ja)
CN (1) CN1384856A (ja)
AU (1) AU7429900A (ja)
BR (1) BR0014092A (ja)
CA (1) CA2384842A1 (ja)
FR (1) FR2798665B1 (ja)
HU (1) HUP0204036A2 (ja)
SK (1) SK5202002A3 (ja)
WO (1) WO2001021706A1 (ja)

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US6931184B2 (en) * 2003-05-30 2005-08-16 Corning Cable Systems Llc Dry tube fiber optic assemblies, cables, and manufacturing methods therefor
DE60335747D1 (de) * 2003-08-28 2011-02-24 Prysmian Spa Optisches kabel und darin enthaltene optische einheit
DE102004035809A1 (de) * 2004-07-23 2006-03-16 CCS Technology, Inc., Wilmington Optisches Kabel und Verfahren zur Herstellung eines optischen Kabels
CN102549466B (zh) 2009-09-28 2016-06-22 普睿司曼股份公司 光学通信缆线以及制造工艺
JP5937431B2 (ja) * 2012-06-12 2016-06-22 Ｊｆｅケミカル株式会社 樹脂組成物およびその硬化物
JP5948183B2 (ja) * 2012-08-23 2016-07-06 株式会社細川洋行 ブロー成形容器及びブロー成形容器用樹脂組成物
US11287589B2 (en) 2012-09-26 2022-03-29 Corning Optical Communications LLC Binder film for a fiber optic cable
US9091830B2 (en) 2012-09-26 2015-07-28 Corning Cable Systems Llc Binder film for a fiber optic cable
US8620124B1 (en) 2012-09-26 2013-12-31 Corning Cable Systems Llc Binder film for a fiber optic cable
JP2015007680A (ja) * 2013-06-25 2015-01-15 住友電気工業株式会社 光ケーブル
US9482839B2 (en) 2013-08-09 2016-11-01 Corning Cable Systems Llc Optical fiber cable with anti-split feature
US8805144B1 (en) 2013-09-24 2014-08-12 Corning Optical Communications LLC Stretchable fiber optic cable
US9075212B2 (en) 2013-09-24 2015-07-07 Corning Optical Communications LLC Stretchable fiber optic cable
US8913862B1 (en) 2013-09-27 2014-12-16 Corning Optical Communications LLC Optical communication cable
US9594226B2 (en) 2013-10-18 2017-03-14 Corning Optical Communications LLC Optical fiber cable with reinforcement

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Also Published As

Publication number Publication date
JP2003510394A (ja) 2003-03-18
FR2798665A1 (fr) 2001-03-23
SK5202002A3 (en) 2002-09-10
WO2001021706A1 (fr) 2001-03-29
BR0014092A (pt) 2002-08-20
CA2384842A1 (fr) 2001-03-29
KR20020053812A (ko) 2002-07-05
HUP0204036A2 (en) 2003-05-28
AU7429900A (en) 2001-04-24
CN1384856A (zh) 2002-12-11
FR2798665B1 (fr) 2003-08-29

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