CN104194140A - Preparation technique of lower-fiber-attenuation sheath material for connection to network optical cable - Google Patents
Preparation technique of lower-fiber-attenuation sheath material for connection to network optical cable Download PDFInfo
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- CN104194140A CN104194140A CN201410439382.8A CN201410439382A CN104194140A CN 104194140 A CN104194140 A CN 104194140A CN 201410439382 A CN201410439382 A CN 201410439382A CN 104194140 A CN104194140 A CN 104194140A
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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
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
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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
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- 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
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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
- C08L2201/02—Flame or fire retardant/resistant
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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
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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
- C08L2205/02—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
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- Polymers & Plastics (AREA)
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- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Engineering & Computer Science (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention discloses a preparation technique of a lower-fiber-attenuation sheath material for connection to a network optical cable, which comprises the following steps: 1. compounding 5-15 parts of high-melt-index ethylene-vinyl acetate copolymer, 5-15 parts of low-melt-index ethylene-vinyl acetate copolymer, 5-15 parts of polyethylene, 55-65 parts of flame retardant, 10-20 parts of compatilizer, 2-3 parts of ultrahigh-molecular-weight silicone and 0.3-0.8 part of antioxidant in a kneading machine; 2. when the compounding temperature reaches 135-150 DEG C, sending the discharged material into a double-screw extruder, wherein the temperature of the feeding section is 90-110 DEG C, the temperature of the conveying section is 120-130 DEG C, the temperature of the plastifying section is 130-140 DEG C, and the temperature of the machine head is 135-145 DEG C; and 3. granulating by an air-cooling hot-cutting technique, and drying the granules to obtain the sheath material. The sheath material has the advantages of favorable surface in the quick extrusion process, favorable flowing property, favorable bonding property, excellent product quality and greatly lower fiber attenuation.
Description
Technical field
The present invention relates to access the sheath material of connecting network optical cable, particularly a kind of connecting network protecting sleeve of optical cable preparation technology.
Background technology
Existing common low-smoke halogen-free material mainly uses eutectic to refer to that ethene-acetate ethylene copolymer (molten finger between 2-8) is as base-material, a little compatilizer of arranging in pairs or groups, and the polyethylene wax lubricant of small molecules amount, exist like this various disadvantages: first, covered wire cable belongs to fine rule, if large-scale production, require quite high for extruded velocity, require material still fine at the situation lower surface of extruding fast, but existing low-smoke halogen-free material is owing to adopting eutectic to refer to that ethene-acetate ethylene copolymer is as base-material, the mobility of material is bad, under high filler loading capacity, extruded velocity is difficult to raise very high, and curtain coating phenomenon is serious, secondly, the cross section of covered wire cable, in the time being 8 font, due to reasons such as mould restrictions, requires very highly for the discharging at middle connecting sewing place, and common low-smoke halogen-free material is because mobility is bad, the easy fracture in connecting sewing place, and the too low surface of cohesive strength is crude etc., again, coating layer material directly contacts with optical fiber and reinforcement thereof, if bond not firm shrink serious words can be very large to the influence of fading of fiber-optic signal, in existing common low-smoke non-halogen flame-retardant coating layer material, only use a little compatilizer, make for signal attenuation on covered wire cable generally larger.
Summary of the invention
The object of this invention is to provide material flowability good and with the sheath material preparation technology of the good reduction optical fiber attenuation degree for connecting network optical cable of the cohesiveness of optical fiber and reinforcement thereof, the sheath material that this preparation technology obtains surface in quick extrusion is better, material flowability energy and adhesive property are good, quality product excellence, and greatly reduce optical fiber attenuation degree.
For achieving the above object, the technical solution used in the present invention is: a kind of sheath material preparation technology of the reduction optical fiber attenuation degree for connecting network optical cable, comprises the following steps:
Step 1, refer to that by molten height ethylene-vinyl acetate copolymer 5-15, eutectic refer to that ethylene-vinyl acetate copolymer 5-15, polyethylene 5-15, fire retardant 55-65, compatilizer 10-20, molecular weight are more than 2,000 ten thousand ultra-high molecular weight silicone 2-3, oxidation inhibitor 0.3-0.8, add in milling machine, carry out mixing, described height is molten refers to that ethylene-vinyl acetate copolymer is the hot melt adhesive level ethene-acetate ethylene copolymer of melting index more than 200, described eutectic refers to that ethylene-vinyl acetate copolymer is the extrusion grade ethene-acetate ethylene copolymer of melting index between 2-8, described fire retardant adopts aluminium hydroxide, magnesium hydroxide, zinc borate, the combination of one or more in ammonium polyphosphate, and process in homogenizer through silane coupling agent, described compatilizer is ethylene-vinyl acetate copolymer grafted maleic anhydride multipolymer, described ultra-high molecular weight silicone is the ultra-high molecular weight siloxanes taking polyethylene as carrier, siloxane molecule amount is more than 2,000,000, described oxidation inhibitor adopts four [3-(3, 5-di-t-butyl-4-hydroxy phenyl) propionic acid] pentaerythritol ester, 4, 4 '-thiobis (the 6-tertiary butyl-3-methylphenol), Tyox B, (2, 4-di-tert-butyl-phenyl) combination of a kind of in tris phosphite or two kinds,
When step 2, melting temperature to 135 DEG C ~ 150 DEG C, Bitruder is sent in discharging, plastify through twin screw, again through single screw rod granulation, screw zones temperature is as follows: feeding section 90-110 degree Celsius, transportation section 120-130 degree Celsius, fluxing zone 130-140 degree Celsius, head temperature 135-145 degree Celsius;
Step 3, granulation adopt air-cooled fervent technique, make after particle the dry sheath material that obtains again.
In technique scheme, further improved plan is as follows:
1,, in such scheme, the particle diameter of described aluminium hydroxide, described magnesium hydroxide is 1 ~ 3 μ m.
2, in such scheme, the about 8-12min of mixing time in described step 1.
Due to the utilization of technique scheme, the present invention compared with prior art has following advantages:
The present invention obtains sheath material for the preparation technology of connecting network optical cable, in base-material, use the molten hot melt adhesive level ethene-acetate ethylene copolymer that refers to of height of more amount, can improve the mobility of material, make material surface in quick extrusion better, and the cross section of covered wire cable is in the time being 8 font, in the middle of good material flowability ensures, connecting sewing place is smooth firmly; In addition, in order to reduce the curtain coating phenomenon occurring in crushing failure at high speed formula extrusion, adopt ultra-high molecular weight silicone master batch as lubricant, avoid using the polyethylene wax lubricant of small molecules amount; Furthermore, in coating layer material, increase the consumption of compatilizer, and fire retardant powder uses silane coupling agent processing, can strengthen the adhesive property of coating layer material and optical fiber and reinforcement thereof, can greatly reduce like this optical fiber attenuation degree.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment: a kind of sheath material preparation technology of the reduction optical fiber attenuation degree for connecting network optical cable, what first will solve is the flowability problem of material under height is filled, " background technology " part is mentioned in the above, existing common low-smoke non-halogen flame-retardant material, the main eutectic that uses refers to that ethene-acetate ethylene copolymer (molten finger between 2-8) is as base-material, because existing low-smoke non-halogen flame-retardant material is most of for large cable, therefore require extruded velocity slow, fear cracking, coating layer material of the present invention is due to for the less flex cable of wire diameter, so need not consider problem of Cracking, therefore used the molten hot melt adhesive level ethene-acetate ethylene copolymer that refers to of a large amount of height in coating layer material of the present invention, this has just well solved the problem of the mobility of material from base-material.
The sheath material that preparation technology of the present invention obtains has not only adopted high molten finger hot melt adhesive level (more than 200) ethylene-vinyl acetate copolymer as base-material, improve the mobility of material, also adopt ultra-high molecular weight import silicone (more than 2,000 ten thousand) as lubricated, reduce the curtain coating in extrusion, and the consumption of raising compatilizer, and fire retardant powder is processed, increase the bounding force of material and optical fiber and reinforcement thereof.
Specifically, a kind of sheath material preparation technology of the reduction optical fiber attenuation degree for connecting network optical cable, comprises the following steps:
Step 1, refer to that by molten height ethylene-vinyl acetate copolymer 5-15, eutectic refer to that ethylene-vinyl acetate copolymer 5-15, polyethylene 5-15, fire retardant 55-65, compatilizer 10-20, molecular weight are more than 2,000 ten thousand ultra-high molecular weight silicone 2-3, oxidation inhibitor 0.3-0.8, add in milling machine, carry out mixing, described height is molten refers to that ethylene-vinyl acetate copolymer is the hot melt adhesive level ethene-acetate ethylene copolymer of melting index more than 200, described eutectic refers to that ethylene-vinyl acetate copolymer is the extrusion grade ethene-acetate ethylene copolymer of melting index between 2-8, described fire retardant adopts aluminium hydroxide, magnesium hydroxide, zinc borate, the combination of one or more in ammonium polyphosphate, and process in homogenizer through silane coupling agent, described compatilizer is ethylene-vinyl acetate copolymer grafted maleic anhydride multipolymer, described ultra-high molecular weight silicone is the ultra-high molecular weight siloxanes taking polyethylene as carrier, siloxane molecule amount is more than 2,000,000, described oxidation inhibitor adopts four [3-(3, 5-di-t-butyl-4-hydroxy phenyl) propionic acid] pentaerythritol ester, 4, 4 '-thiobis (the 6-tertiary butyl-3-methylphenol), Tyox B, (2, 4-di-tert-butyl-phenyl) combination of a kind of in tris phosphite or two kinds,
When step 2, melting temperature to 135 DEG C ~ 150 DEG C, Bitruder is sent in discharging, plastify through twin screw, again through single screw rod granulation, screw zones temperature is as follows: feeding section 90-110 degree Celsius, transportation section 120-130 degree Celsius, fluxing zone 130-140 degree Celsius, head temperature 135-145 degree Celsius;
Step 3, granulation adopt air-cooled fervent technique, make after particle the dry sheath material that obtains again.
The about 8-12min of mixing time in above-mentioned steps one; The particle diameter of above-mentioned aluminium hydroxide, described magnesium hydroxide is 1 ~ 3 μ m.
The present invention has ensured the good flame retardant properties of coating layer material by flame retardant compositions, fire retardant powder is through silane coupling agent processing, so on the one hand can dispersion powder, ensure fire retardant powder being uniformly distributed in coating layer material, avoid fire retardant powder to be polymerized to group, on the other hand, silane coupling agent can improve fire retardant powder and refer to ethene-acetate ethylene copolymer, poly consistency, and strengthen the adhesive property of coating layer material and optical fiber and reinforcement thereof with high molten finger ethene-acetate ethylene copolymer, eutectic; Compatilizer is ethene-acetate ethylene copolymer grafted maleic anhydride multipolymer, refer to that because height is molten ethene-acetate ethylene copolymer and polyethylene, fire retardant consistency are bad, so adopted compatilizer to improve between resin and the consistency of resin and fire retardant, increase the consumption of compatilizer simultaneously, also can strengthen the adhesive property of coating layer material and optical fiber and reinforcement thereof; Ultra-high molecular weight silicone is the ultra-high molecular weight siloxanes taking polyethylene as carrier, and siloxane molecule amount, more than 2,000,000, adopts ultra-high molecular weight silicone master batch as lubricant, can reduce like this curtain coating phenomenon occurring in crushing failure at high speed formula extrusion; Oxidation inhibitor adopts four [3-(3,5-di-t-butyl-4-hydroxy phenyl) propionic acid] pentaerythritol ester, 4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol), Tyox B, (2,4-di-tert-butyl-phenyl) combination of a kind of in tris phosphite or two kinds, the antioxygenation of oxidation inhibitor can reduce the aging speed of coating layer material.
The sheath material that preparation technology of the present invention obtains, in base-material, use the molten hot melt adhesive level ethene-acetate ethylene copolymer that refers to of a large amount of height, can improve the mobility of material, make material surface in quick extrusion better, and the cross section of covered wire cable is in the time being 8 font, in the middle of good material flowability ensures, connecting sewing place is smooth firmly; In addition, in order to reduce the curtain coating phenomenon occurring in crushing failure at high speed formula extrusion, adopt ultra-high molecular weight silicone master batch as lubricant, avoid using the polyethylene wax lubricant of small molecules amount; Furthermore, in coating layer material, increase the consumption of compatilizer, and fire retardant powder uses silane coupling agent processing, can strengthen the adhesive property of coating layer material and optical fiber and reinforcement thereof, can greatly reduce like this optical fiber attenuation degree.
Above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that spirit is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (3)
1. for a sheath material preparation technology for the reduction optical fiber attenuation degree of connecting network optical cable, it is characterized in that:
Comprise the following steps:
Step 1, refer to that by molten height ethylene-vinyl acetate copolymer 5-15, eutectic refer to that ethylene-vinyl acetate copolymer 5-15, polyethylene 5-15, fire retardant 55-65, compatilizer 10-20, molecular weight are more than 2,000 ten thousand ultra-high molecular weight silicone 2-3, oxidation inhibitor 0.3-0.8, add in milling machine, carry out mixing, described height is molten refers to that ethylene-vinyl acetate copolymer is the hot melt adhesive level ethene-acetate ethylene copolymer of melting index more than 200, described eutectic refers to that ethylene-vinyl acetate copolymer is the extrusion grade ethene-acetate ethylene copolymer of melting index between 2-8, described fire retardant adopts aluminium hydroxide, magnesium hydroxide, zinc borate, the combination of one or more in ammonium polyphosphate, and process in homogenizer through silane coupling agent, described compatilizer is ethylene-vinyl acetate copolymer grafted maleic anhydride multipolymer, described ultra-high molecular weight silicone is the ultra-high molecular weight siloxanes taking polyethylene as carrier, siloxane molecule amount is more than 2,000,000, described oxidation inhibitor adopts four [3-(3, 5-di-t-butyl-4-hydroxy phenyl) propionic acid] pentaerythritol ester, 4, 4 '-thiobis (the 6-tertiary butyl-3-methylphenol), Tyox B, (2, 4-di-tert-butyl-phenyl) combination of a kind of in tris phosphite or two kinds,
When step 2, melting temperature to 135 DEG C ~ 150 DEG C, Bitruder is sent in discharging, plastify through twin screw, again through single screw rod granulation, screw zones temperature is as follows: feeding section 90-110 degree Celsius, transportation section 120-130 degree Celsius, fluxing zone 130-140 degree Celsius, head temperature 135-145 degree Celsius;
Step 3, granulation adopt air-cooled fervent technique, make after particle the dry sheath material that obtains again.
2. the sheath material preparation technology of the reduction optical fiber attenuation degree for connecting network optical cable according to claim 1, is characterized in that: the particle diameter of described aluminium hydroxide, described magnesium hydroxide is 1 ~ 3 μ m.
3. the sheath material preparation technology of the reduction optical fiber attenuation degree for connecting network optical cable according to claim 1, is characterized in that: the about 8-12min of mixing time in described step 1.
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| CN201410439382.8A CN104194140A (en) | 2011-08-30 | 2011-08-30 | Preparation technique of lower-fiber-attenuation sheath material for connection to network optical cable |
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| CN201410439382.8A CN104194140A (en) | 2011-08-30 | 2011-08-30 | Preparation technique of lower-fiber-attenuation sheath material for connection to network optical cable |
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| CN201110251298.XA Division CN102955212B (en) | 2011-08-30 | 2011-08-30 | Special low-smoke halogen-free flame retardant cladding layer material for butterfly-shaped introduction cable of access network |
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| CN104194140A true CN104194140A (en) | 2014-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105001496A (en) * | 2015-08-06 | 2015-10-28 | 安徽电信器材贸易工业有限责任公司 | High-bonding-strength optical fiber sheathing material |
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| CN101702049A (en) * | 2009-11-30 | 2010-05-05 | 苏州亨利通信材料有限公司 | Scratch-resistant environment-friendly low-smoke halogen-free flame-retardant sheath material for special optical cable |
| CN102952312A (en) * | 2011-08-30 | 2013-03-06 | 苏州亨利通信材料有限公司 | Special anti-bonding low-smoke halogen-free flame-retardant sheath material for GJFJZY type multi-core indoor optical cable |
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2011
- 2011-08-30 CN CN201410439382.8A patent/CN104194140A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016395A (en) * | 2007-02-28 | 2007-08-15 | 石明东 | Thermoplastic low-smoke halide-free fireproof composite polyolefine material and its preparation |
| CN101608032A (en) * | 2008-06-20 | 2009-12-23 | 苏州亨利通信材料有限公司 | Environmental-friendly halogen-free low-smoke flame retardant material for coaxial cable and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105001496A (en) * | 2015-08-06 | 2015-10-28 | 安徽电信器材贸易工业有限责任公司 | High-bonding-strength optical fiber sheathing material |
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