CN103694528A - Anti-cracking low smoke halogen-free fire-retardation sheath material for optical fiber cable, and preparation process thereof - Google Patents
Anti-cracking low smoke halogen-free fire-retardation sheath material for optical fiber cable, and preparation process thereof Download PDFInfo
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- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
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- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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Abstract
The present invention discloses an anti-cracking low smoke halogen-free fire-retardation sheath material for an optical fiber cable. The material comprises, by weight, 58-62% of a base material, 33-37% of a fire retardation agent, 0.8-1% of a coupling agent, 0.6-1% of a fluorine-containing rheological agent, 0.8-1% of a lubricant, 0.8-1% of an antioxidant, and 1-1.4% of carbon black. The process comprises: making carbon black into a master batch, carrying out a surface treatment on a fire retardation agent with a coupling agent, mixing the carbon black and an antioxidant, adding the obtained mixed material to the obtained fire retardation agent treated by the coupling agent to mix, adding the obtained mixture to a base material to mix, and carrying out mastication on the obtained material. With the scheme, cracking resistance in the hot state is increased, the binding force of the plastic base material and inorganic filler interface is enhanced, and the compatibility between the inorganic filler and the plastic base material is improved.
Description
Technical field
The present invention relates to optical fiber cable field, particularly relate to a kind of low-smoke halogen-free flame-retardant sheath material with splitting resistance and manufacture craft thereof for optical cable.
Background technology
In some environment, lay the optical cable of use, require to have flame-retarding characteristic.Such as the optical cable using in occasions such as subway, tunnel, oil, colliery and building, computer house, public buildings.At this moment should adopt fire retardant material to make cable jacket, particularly along with developing rapidly that Fiber to the home (FTTH), inside cable especially in rubber-insulated wire (connecting network butterfly optical cable) optical cable, must adopt flame-retardant sheath material.Flame-retardant sheath material is minute two large classes conventionally, and the one, flame-proof polyvinyl chloride (PVC) sheath material, the one, fire retardant polyolefin (as EVA, PE) sheath material.
In polyvinyl chloride molecule, there is chlorine atom (halogen atom) to have flammable lower advantage compared with the pure hydrocarbon polymer of this class of polyethylene, pvc sheath also has good mechanical properties, anti-chemical reaction and good environmental performance, is widely used as cable jacket material.In polyvinyl chloride, add mineral filler, the flame-proof material that antioxidant is made has well flame retardant properties, but the free chlorine producing when flame-proof PVC burns reacts the HCI that generation has strong corrosion with water in air branch, also can produce dense black smoke.Therefore, even the black smoke that the flame-proof PVC of low-smoke low-halogen generates when burning and corrodibility HCI also can bring the difficulty of fire extinguishing and the infringement to buildings.Thereby preferably adopt the flame retardant polyolefine material of low cigarette, Halogen as sheath material.But polyolefine itself is inflammable and prolongs the material of combustion.In order to reduce its combustibility, be in mixture content inorganic filling, as aluminium hydroxide, magnesium hydroxide etc.
These mineral fillers at a certain temperature can melting, and its decomposition temperature is a little more than sheathing temperature.In polymkeric substance, add after mineral filler, certainly will reduce its mechanical property and extrusion performance, thereby can add appropriate oxidation inhibitor and carbon black by adding coupling agent to improve machinery and the extrusion performance of mixture, make the flame-retardant sheath material of low smoke and zero halogen.But in the commerical prod of most low-smoke halogen-free flame-retardant sheath material, all there is the poor problem of splitting resistance.Some low-smoke non-halogen flame-retardant optical cables, even also on reel, there is cracking phenomena, normally the cable jacket of the outermost layer sunny slope of drum ftractures, often under summer, the sun was exposed to the sun, and the cracking phenomena producing under the effect of optical cable flexural loading and thermal stresses.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of low-smoke halogen-free flame-retardant sheath material with splitting resistance and manufacture craft thereof for optical cable, can improve the anti-cracking performance of plastic matrix when hot, improve the interface binding power of plastic matrix and mineral filler.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable is provided, its component and content weight percentage are: base-material 58%-62%, fire retardant 33%-37%, coupling agent 0.8%-1%, fluorine-containing rheological agent 0.6%-1%, lubricant 0.8%-1%, oxidation inhibitor 0.8%-1%, carbon black 1%-1.4%
Wherein, base-material is high density polyethylene(HDPE) base-material,
Fire retardant is one or more of aluminium hydroxide and magnesium hydroxide,
Coupling agent is monoalkoxy type titante coupling agent,
Oxidation inhibitor comprises 1010 phenols primary antioxidants and the collaborative oxidation inhibitor of 168 phosphorous acid esters,
Carbon black is channel black.
In a preferred embodiment of the present invention, its component and content weight percentage are: base-material 60%, aluminium hydroxide 27%, magnesium hydroxide 8%, coupling agent 1%, fluorine-containing rheological agent 0.8%, lubricant 1%, oxidation inhibitor 1%, carbon black 1.2%.
In a preferred embodiment of the present invention, described fluorine-containing rheological agent is the poly-terephthaloyl Ursol D PPA of modification.
In a preferred embodiment of the present invention, described lubricant is PE wax lubricant.
In a preferred embodiment of the present invention, the granularity of described channel black is 15mm-30mm.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of manufacture craft of the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable is provided, comprises the following steps:
(1) carbon black is made to masterbatch;
(2) coupling agent is carried out to surface treatment to fire retardant: first fire retardant is dried, then coupling agent and fire retardant are mixed, make the surface modification of fire retardant and further remove moisture content;
(3) carbon black and oxidation inhibitor are mixed;
(4) the mixed material again step (3) being completed is added in the fire retardant after coupling agent treatment and mixes;
(5) compound step (4) being completed is added in base-material and mixes;
(6) will complete mixed material and plasticate, and after extruding, carry out coolingly, last pelletizing, completes making.
In a preferred embodiment of the present invention, in step (2), coupling agent and fire retardant are to mix 10-12 minute at 80 ℃ of-90 ℃ of temperature.
In a preferred embodiment of the present invention, in step (2), fire retardant is dried to water content and be less than 0.5%.
In a preferred embodiment of the present invention, in step (3), the mixing time of carbon black and oxidation inhibitor is 10 minutes, and the mixing time in step (4) and step (5) is 10 minutes.
In a preferred embodiment of the present invention, the temperature of plasticating in step (6) is 150 ℃-170 ℃.
The invention has the beneficial effects as follows: the present invention, for the low-smoke halogen-free flame-retardant sheath material with splitting resistance of optical cable and the good heat resistance that manufacture craft is selected plastic matrix thereof, has improved its splitting resistance when hot; Strengthened the bonding force at plastic matrix and mineral filler interface; Improved the consistency of mineral filler and plastic matrix; By processing technology, various components are fully mixed, keep well with plastifying state, thus the anti-cracking performance of raising material.
Embodiment
Below the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention comprises:
Embodiment 1:
For a low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable, its component and content weight percentage are: base-material 58%, and fire retardant 33%, coupling agent 0.8%, fluorine-containing rheological agent 0.6%, lubricant 0.8%, oxidation inhibitor 0.8%, carbon black 1%,
Wherein, base-material is high density polyethylene(HDPE) base-material, has higher thermotolerance in polyolefine material, can improve the anti-cracking performance of sheath material when hot.
Fire retardant comprises aluminium hydroxide 26% and magnesium hydroxide 7%.
Aluminium hydroxide is hibbsite, and (being called for short ATH) is main inorganic metal oxyhydroxide fire retardant, accounts for the more than 80% of inorganic combustion inhibitor consumption, and after ATH is heated, three crystal water can discharge at three different temperature.The fire retardant mechanism of ATH can be summarized as: one: fill the density loss that ATH can make flammable superpolymer; Two; Dehydration after ATH heat absorption, aquation is water vapour absorbing polymeric burning institute liberated heat, and the temperature that suppresses polymkeric substance raises, and the concentration of dilution inflammable gas and oxygen stops combustion reactions to be proceeded; Three: can be at combustiblematerials Surface Creation Al after ATH dehydration
2o
3thermofin, stops polymkeric substance to contact with oxygen, plays fire retardation.The flame retardant effect of ATH and its addition have very large relation, and generally needing more than 50% just can have obvious effect.So large addition can make the viscosity of plastics increase, Plasticity Decreasing, and elongation at break declines.In order to address this problem, generally adopt coupling agent treatment ATH, can obtain good effect.The granularity of ATH has a great impact flame retardance of polymer performance and mechanical property, and research shows, the fire retardant of equivalent, granularity is less, and specific surface area is larger, and flame retardant effect is better, the ATH of Ultra-fine, can strengthen the interaction at interface, effectively improves the mechanical property of multipolymer.In formula of the present invention, adopt the aluminium hydroxide of micro-AH-2 specification, its median size≤3 micron.
Metallic hydrogen magnesium oxide (MH) is also a kind of effective halogen-free flame retardants, and its principle is similar with aluminium hydroxide.Show according to the study, adopt magnesium hydroxide flame retardant polyolefine oxygen index can reach 41.The research that the magnesium hydroxide of take is halogen-free flame retardants is a lot, all obtains good effect, and flame retardant of magnesium hydroxide and aluminium hydroxide are similar, is also high additive flame retardant, and for this reason, it is necessary that magnesium hydroxide has been carried out to various surface treatments.Use separately a kind of fire retardant to be generally difficult to meet the service requirements of non-halogen flame-retardant cable, therefore, usually select two or more fire retardant to be used in conjunction with.
Aluminium hydroxide and magnesium hydroxide are used in conjunction with, can play synergy, although the heat that magnesium hydroxide decomposition absorbs is less than aluminium hydroxide, decomposition temperature is higher, can reach 340
oc.Magnesium hydroxide has the polymer surfaces of promotion to become charcoal effect, and both are combined with and make flame retardant effect better.
Coupling agent is monoalkoxy type titante coupling agent; at optical cable, take the polyolefine such as PE as base-material; with hydrated aluminum oxide etc. in the sheath material containing the dry flame retardant filler of free-water; adopt monoalkoxy type titante coupling agent comparatively effective, as isopropyl triisostearoyl titanate OL-T999.
Described fluorine-containing rheological agent is the poly-terephthaloyl Ursol D PPA of modification.It is improved polyolefinic rheological property, and melt viscosity regulates, the effects such as surface modification.PPA is a kind of ultra-fine particulate, has splendid sliding in plastic body.Add and can make master batch with PE base-material and PPA powder man-hour, then be added in base-material and go.The effect of fluorine-containing rheological agent can be summed up as follows; (a) fluorine-containing rheological agent can migrate to head/melt interface and forms one deck book film, as the lubricant of head, thereby reduces extrusion pressure; (b) the shearing rate value that at a certain temperature, adds the PE of PPA to start to occur continuous melt fracture starts to occur the shearing rate value of continuous melt fracture far above the PE that does not add PPA.Thereby can effectively eliminate melt fracture phenomenon, and reduce melt temperature, improve extrusion efficiency; (c) there is shark skin spot in the jacket surface of avoiding extruding, makes surface-brightening smooth.To certain polymkeric substance and processing conditions, the content of PPA has an optimum value, and the excessive production cost that not only increases of content also can affect the extrusion performance of sheath.Conventionally content should be less than 1%.
Described lubricant is PE wax lubricant.Superpolymer after melting, conventionally there is higher viscosity, in the course of processing, the superpolymer of melting is when extruding, during by spiral shell thorax and mold runner, polymer melt must produce friction with processor surface, and some friction is very disadvantageous to the processing of polymkeric substance, and these frictions reduce fluidity of molten, serious friction simultaneously can make jacket surface become coarse, lacks gloss or occurs flow liner.For this reason, need to add to improve oilness, reduce friction, reduce Interface Adhesion performance is object auxiliary agent.Here it is lubricant.Lubricant, except improving mobility, can also play the effects such as melting promotor, anti and antistatic agent, slipping agent.Lubricant can be divided into two kinds of external lubricant and internal lubricants, and the effect of external lubricant is mainly the friction that improves the hot metal surface of polymer melt and processing units.It and polymer phase capacitive are poor, easily from melt toward external migration, so can form at the interface of plastic melt and metal lubricated thin layer.Internal lubricant and polymkeric substance have good consistency, and it plays the effect that reduces force of cohesion between polymer molecule in polymkeric substance inside, thereby improves the internal friction heat-dissipating of plastic melt and the mobility of melt.This patent adopts PE wax lubricant, is because it and PE base-material homogeneity have better consistency.
Oxidation inhibitor is in order to thermo oxidative aging.Oxidation inhibitor comprises 1010 phenols primary antioxidants and the collaborative oxidation inhibitor of 168 phosphorous acid esters, and the former can absorb the free radical that oxidizing reaction produces, latter chain reaction capable of blocking, the carrying out of inhibited oxidation process.
Carbon black is channel black, and granularity is 15-30nm.With carbon black master batch form, add base-material mixed.
Embodiment 2:
For a low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable, its component and content weight percentage are: base-material 60%, fire retardant 35%, coupling agent 1%, fluorine-containing rheological agent 0.8%, lubricant 1%, oxidation inhibitor 1%, carbon black 1.2%.
Wherein, base-material is high density polyethylene(HDPE) base-material, has higher thermotolerance in polyolefine material, can improve the anti-cracking performance of sheath material when hot.
Fire retardant comprises aluminium hydroxide 27% and magnesium hydroxide 8%.
Aluminium hydroxide is hibbsite, and (being called for short ATH) is main inorganic metal oxyhydroxide fire retardant, accounts for the more than 80% of inorganic combustion inhibitor consumption, and after ATH is heated, three crystal water can discharge at three different temperature.The fire retardant mechanism of ATH can be summarized as: one: fill the density loss that ATH can make flammable superpolymer; Two; Dehydration after ATH heat absorption, aquation is water vapour absorbing polymeric burning institute liberated heat, and the temperature that suppresses polymkeric substance raises, and the concentration of dilution inflammable gas and oxygen stops combustion reactions to be proceeded; Three: can be at combustiblematerials Surface Creation Al after ATH dehydration
2o
3thermofin, stops polymkeric substance to contact with oxygen, plays fire retardation.The flame retardant effect of ATH and its addition have very large relation, and generally needing more than 50% just can have obvious effect.So large addition can make the viscosity of plastics increase, Plasticity Decreasing, and elongation at break declines.In order to address this problem, generally adopt coupling agent treatment ATH, can obtain good effect.The granularity of ATH has a great impact flame retardance of polymer performance and mechanical property, and research shows, the fire retardant of equivalent, granularity is less, and specific surface area is larger, and flame retardant effect is better, the ATH of Ultra-fine, can strengthen the interaction at interface, effectively improves the mechanical property of multipolymer.In formula of the present invention, adopt the aluminium hydroxide of micro-AH-2 specification, its median size≤3 micron.
Metallic hydrogen magnesium oxide (MH) is also a kind of effective halogen-free flame retardants, and its principle is similar with aluminium hydroxide.Show according to the study, adopt magnesium hydroxide flame retardant polyolefine oxygen index can reach 41.The research that the magnesium hydroxide of take is halogen-free flame retardants is a lot, all obtains good effect, and flame retardant of magnesium hydroxide and aluminium hydroxide are similar, is also high additive flame retardant, and for this reason, it is necessary that magnesium hydroxide has been carried out to various surface treatments.Use separately a kind of fire retardant to be generally difficult to meet the service requirements of non-halogen flame-retardant cable, therefore, usually select two or more fire retardant to be used in conjunction with.
Aluminium hydroxide and magnesium hydroxide are used in conjunction with, can play synergy, although the heat that magnesium hydroxide decomposition absorbs is less than aluminium hydroxide, decomposition temperature is higher, can reach 340
oc.Magnesium hydroxide has the polymer surfaces of promotion to become charcoal effect, and both are combined with and make flame retardant effect better.
Coupling agent is monoalkoxy type titante coupling agent; at optical cable, take the polyolefine such as PE as base-material; with hydrated aluminum oxide etc. in the sheath material containing the dry flame retardant filler of free-water; adopt monoalkoxy type titante coupling agent comparatively effective, as isopropyl triisostearoyl titanate OL-T999.
Described fluorine-containing rheological agent is the poly-terephthaloyl Ursol D PPA of modification.It is improved polyolefinic rheological property, and melt viscosity regulates, the effects such as surface modification.PPA is a kind of ultra-fine particulate, has splendid sliding in plastic body.Add and can make master batch with PE base-material and PPA powder man-hour, then be added in base-material and go.The effect of fluorine-containing rheological agent can be summed up as follows; (a) fluorine-containing rheological agent can migrate to head/melt interface and forms one deck book film, as the lubricant of head, thereby reduces extrusion pressure; (b) the shearing rate value that at a certain temperature, adds the PE of PPA to start to occur continuous melt fracture starts to occur the shearing rate value of continuous melt fracture far above the PE that does not add PPA.Thereby can effectively eliminate melt fracture phenomenon, and reduce melt temperature, improve extrusion efficiency; (c) there is shark skin spot in the jacket surface of avoiding extruding, makes surface-brightening smooth.To certain polymkeric substance and processing conditions, the content of PPA has an optimum value, and the excessive production cost that not only increases of content also can affect the extrusion performance of sheath.Conventionally content should be less than 1%.
Described lubricant is PE wax lubricant.Superpolymer after melting, conventionally there is higher viscosity, in the course of processing, the superpolymer of melting is when extruding, during by spiral shell thorax and mold runner, polymer melt must produce friction with processor surface, and some friction is very disadvantageous to the processing of polymkeric substance, and these frictions reduce fluidity of molten, serious friction simultaneously can make jacket surface become coarse, lacks gloss or occurs flow liner.For this reason, need to add to improve oilness, reduce friction, reduce Interface Adhesion performance is object auxiliary agent.Here it is lubricant.Lubricant, except improving mobility, can also play the effects such as melting promotor, anti and antistatic agent, slipping agent.Lubricant can be divided into two kinds of external lubricant and internal lubricants, and the effect of external lubricant is mainly the friction that improves the hot metal surface of polymer melt and processing units.It and polymer phase capacitive are poor, easily from melt toward external migration, so can form at the interface of plastic melt and metal lubricated thin layer.Internal lubricant and polymkeric substance have good consistency, and it plays the effect that reduces force of cohesion between polymer molecule in polymkeric substance inside, thereby improves the internal friction heat-dissipating of plastic melt and the mobility of melt.This patent adopts PE wax lubricant, is because it and PE base-material homogeneity have better consistency.
Oxidation inhibitor is in order to thermo oxidative aging.Oxidation inhibitor comprises 1010 phenols primary antioxidants and the collaborative oxidation inhibitor of 168 phosphorous acid esters, and the former can absorb the free radical that oxidizing reaction produces, latter chain reaction capable of blocking, the carrying out of inhibited oxidation process.
Carbon black is channel black, and granularity is 15-30nm.With carbon black master batch form, add base-material mixed.
Embodiment 3:
For a low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable, its component and content weight percentage are: base-material 62%, fire retardant 37%, coupling agent 1%, fluorine-containing rheological agent 1%, lubricant 1%, oxidation inhibitor 1%, carbon black 1%-1.4%.
Wherein, base-material is high density polyethylene(HDPE) base-material, has higher thermotolerance in polyolefine material, can improve the anti-cracking performance of sheath material when hot.
Fire retardant comprises aluminium hydroxide 28% and magnesium hydroxide 9%.
Aluminium hydroxide is hibbsite, and (being called for short ATH) is main inorganic metal oxyhydroxide fire retardant, accounts for the more than 80% of inorganic combustion inhibitor consumption, and after ATH is heated, three crystal water can discharge at three different temperature.The fire retardant mechanism of ATH can be summarized as: one: fill the density loss that ATH can make flammable superpolymer; Two; Dehydration after ATH heat absorption, aquation is water vapour absorbing polymeric burning institute liberated heat, and the temperature that suppresses polymkeric substance raises, and the concentration of dilution inflammable gas and oxygen stops combustion reactions to be proceeded; Three: can be at combustiblematerials Surface Creation Al after ATH dehydration
2o
3thermofin, stops polymkeric substance to contact with oxygen, plays fire retardation.The flame retardant effect of ATH and its addition have very large relation, and generally needing more than 50% just can have obvious effect.So large addition can make the viscosity of plastics increase, Plasticity Decreasing, and elongation at break declines.In order to address this problem, generally adopt coupling agent treatment ATH, can obtain good effect.The granularity of ATH has a great impact flame retardance of polymer performance and mechanical property, and research shows, the fire retardant of equivalent, granularity is less, and specific surface area is larger, and flame retardant effect is better, the ATH of Ultra-fine, can strengthen the interaction at interface, effectively improves the mechanical property of multipolymer.In formula of the present invention, adopt the aluminium hydroxide of micro-AH-2 specification, its median size≤3 micron.
Metallic hydrogen magnesium oxide (MH) is also a kind of effective halogen-free flame retardants, and its principle is similar with aluminium hydroxide.Show according to the study, adopt magnesium hydroxide flame retardant polyolefine oxygen index can reach 41.The research that the magnesium hydroxide of take is halogen-free flame retardants is a lot, all obtains good effect, and flame retardant of magnesium hydroxide and aluminium hydroxide are similar, is also high additive flame retardant, and for this reason, it is necessary that magnesium hydroxide has been carried out to various surface treatments.Use separately a kind of fire retardant to be generally difficult to meet the service requirements of non-halogen flame-retardant cable, therefore, usually select two or more fire retardant to be used in conjunction with.
Aluminium hydroxide and magnesium hydroxide are used in conjunction with, can play synergy, although the heat that magnesium hydroxide decomposition absorbs is less than aluminium hydroxide, decomposition temperature is higher, can reach 340
oc.Magnesium hydroxide has the polymer surfaces of promotion to become charcoal effect, and both are combined with and make flame retardant effect better.
Coupling agent is monoalkoxy type titante coupling agent; at optical cable, take the polyolefine such as PE as base-material; with hydrated aluminum oxide etc. in the sheath material containing the dry flame retardant filler of free-water; adopt monoalkoxy type titante coupling agent comparatively effective, as isopropyl triisostearoyl titanate OL-T999.
Described fluorine-containing rheological agent is the poly-terephthaloyl Ursol D PPA of modification.It is improved polyolefinic rheological property, and melt viscosity regulates, the effects such as surface modification.PPA is a kind of ultra-fine particulate, has splendid sliding in plastic body.Add and can make master batch with PE base-material and PPA powder man-hour, then be added in base-material and go.The effect of fluorine-containing rheological agent can be summed up as follows; (a) fluorine-containing rheological agent can migrate to head/melt interface and forms one deck book film, as the lubricant of head, thereby reduces extrusion pressure; (b) the shearing rate value that at a certain temperature, adds the PE of PPA to start to occur continuous melt fracture starts to occur the shearing rate value of continuous melt fracture far above the PE that does not add PPA.Thereby can effectively eliminate melt fracture phenomenon, and reduce melt temperature, improve extrusion efficiency; (c) there is shark skin spot in the jacket surface of avoiding extruding, makes surface-brightening smooth.To certain polymkeric substance and processing conditions, the content of PPA has an optimum value, and the excessive production cost that not only increases of content also can affect the extrusion performance of sheath.Conventionally content should be less than 1%.
Described lubricant is PE wax lubricant.Superpolymer after melting, conventionally there is higher viscosity, in the course of processing, the superpolymer of melting is when extruding, during by spiral shell thorax and mold runner, polymer melt must produce friction with processor surface, and some friction is very disadvantageous to the processing of polymkeric substance, and these frictions reduce fluidity of molten, serious friction simultaneously can make jacket surface become coarse, lacks gloss or occurs flow liner.For this reason, need to add to improve oilness, reduce friction, reduce Interface Adhesion performance is object auxiliary agent.Here it is lubricant.Lubricant, except improving mobility, can also play the effects such as melting promotor, anti and antistatic agent, slipping agent.Lubricant can be divided into two kinds of external lubricant and internal lubricants, and the effect of external lubricant is mainly the friction that improves the hot metal surface of polymer melt and processing units.It and polymer phase capacitive are poor, easily from melt toward external migration, so can form at the interface of plastic melt and metal lubricated thin layer.Internal lubricant and polymkeric substance have good consistency, and it plays the effect that reduces force of cohesion between polymer molecule in polymkeric substance inside, thereby improves the internal friction heat-dissipating of plastic melt and the mobility of melt.This patent adopts PE wax lubricant, is because it and PE base-material homogeneity have better consistency.
Oxidation inhibitor is in order to thermo oxidative aging.Oxidation inhibitor comprises 1010 phenols primary antioxidants and the collaborative oxidation inhibitor of 168 phosphorous acid esters, and the former can absorb the free radical that oxidizing reaction produces, latter chain reaction capable of blocking, the carrying out of inhibited oxidation process.
Carbon black is channel black, and granularity is 15-30nm.With carbon black master batch form, add base-material mixed.
The manufacture craft that the invention still further relates to a kind of low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable, comprises the following steps:
(1) carbon black is made to masterbatch;
(2) coupling agent is carried out to surface treatment to fire retardant: first fire retardant is dried to water content and be less than 0.5%; then coupling agent and fire retardant are mixed to 10-12 minute at 80 ℃ of-90 ℃ of temperature, make the surface modification of fire retardant and further remove moisture content;
(3) carbon black and oxidation inhibitor are mixed 10 minutes;
(4) the mixed material again step (3) being completed is added in the fire retardant after coupling agent treatment and mixes 10 minutes;
(5) compound step (4) being completed is added in base-material and mixes 10 minutes;
(6) will complete mixed material and plasticate, plasticating temperature is 150 ℃-170 ℃, and after extruding, carries out coolingly, and last pelletizing, completes making.
The present invention, for the low-smoke halogen-free flame-retardant sheath material with splitting resistance of optical cable and the good heat resistance that manufacture craft is selected plastic matrix thereof, has improved its splitting resistance when hot; Strengthened the bonding force at plastic matrix and mineral filler interface; Improved the consistency of mineral filler and plastic matrix; By processing technology, various components are fully mixed, keep well with plastifying state, thus the anti-cracking performance of raising material.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable, it is characterized in that, its component and content weight percentage are: base-material 58%-62%, fire retardant 33%-37%, coupling agent 0.8%-1%, fluorine-containing rheological agent 0.6%-1%, lubricant 0.8%-1%, oxidation inhibitor 0.8%-1%, carbon black 1%-1.4%
Wherein, base-material is high density polyethylene(HDPE) base-material,
Fire retardant is one or more of aluminium hydroxide and magnesium hydroxide,
Coupling agent is monoalkoxy type titante coupling agent,
Oxidation inhibitor comprises 1010 phenols primary antioxidants and the collaborative oxidation inhibitor of 168 phosphorous acid esters,
Carbon black is channel black.
2. the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable according to claim 1, it is characterized in that, its component and content weight percentage are: base-material 60%, aluminium hydroxide 27%, magnesium hydroxide 8%, coupling agent 1%, fluorine-containing rheological agent 0.8%, lubricant 1%, oxidation inhibitor 1%, carbon black 1.2%.
3. the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable according to claim 1, is characterized in that, described fluorine-containing rheological agent is the poly-terephthaloyl Ursol D PPA of modification.
4. the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable according to claim 1, is characterized in that, described lubricant is PE wax lubricant.
5. the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable according to claim 1, is characterized in that, the granularity of described channel black is 15mm-30mm.
6. the manufacture craft of the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable according to claim 1, is characterized in that, comprises the following steps:
(1) carbon black is made to masterbatch;
(2) coupling agent is carried out to surface treatment to fire retardant: first fire retardant is dried, then coupling agent and fire retardant are mixed, make the surface modification of fire retardant and further remove moisture content;
(3) carbon black and oxidation inhibitor are mixed;
(4) the mixed material again step (3) being completed is added in the fire retardant after coupling agent treatment and mixes;
(5) compound step (4) being completed is added in base-material and mixes;
(6) will complete mixed material and plasticate, and after extruding, carry out coolingly, last pelletizing, completes making.
7. the manufacture craft of the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable according to claim 6, is characterized in that, in step (2), coupling agent and fire retardant are to mix 10-12 minute at 80 ℃ of-90 ℃ of temperature.
8. the manufacture craft of the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable according to claim 6, is characterized in that, in step (2), fire retardant is dried to water content and is less than 0.5%.
9. the manufacture craft of the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable according to claim 6, it is characterized in that, in step (3), the mixing time of carbon black and oxidation inhibitor is 10 minutes, and the mixing time in step (4) and step (5) is 10 minutes.
10. the manufacture craft of the low-smoke halogen-free flame-retardant sheath material with splitting resistance for optical cable according to claim 6, is characterized in that, the temperature of plasticating in step (6) is 150 ℃-170 ℃.
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| CN104356480A (en) * | 2014-11-06 | 2015-02-18 | 苏州亨利通信材料有限公司 | Anti-tracking sheathing material for ADSS (all dielectric self-supporting) optical cables |
| CN105218934A (en) * | 2015-08-17 | 2016-01-06 | 无锡杰科塑业有限公司 | Ultralow friction coefficient low-smoke bittern-free highly fire-proof polyolefin jacket material, preparations and applicatio |
| CN105754179A (en) * | 2016-03-07 | 2016-07-13 | 苏州莱特复合材料有限公司 | Flame retardant HDPE cable material and preparation method thereof |
| CN109181049A (en) * | 2018-06-29 | 2019-01-11 | 长春智享优创科技咨询有限公司 | Flame resistance polyethylene composite material and preparation method thereof |
| CN113045812A (en) * | 2021-03-24 | 2021-06-29 | 上海上力特种电缆有限公司 | Communication cable sheath material and anti-crack communication cable |
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| CN102807695A (en) * | 2011-05-31 | 2012-12-05 | 江苏南方通信科技有限公司 | Low smoke halogen-free flame retardant sheath material for optical fiber cable, and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104332219A (en) * | 2014-08-27 | 2015-02-04 | 沈群华 | Cable capable of displaying whether in work state |
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| CN105754179A (en) * | 2016-03-07 | 2016-07-13 | 苏州莱特复合材料有限公司 | Flame retardant HDPE cable material and preparation method thereof |
| CN109181049A (en) * | 2018-06-29 | 2019-01-11 | 长春智享优创科技咨询有限公司 | Flame resistance polyethylene composite material and preparation method thereof |
| CN113045812A (en) * | 2021-03-24 | 2021-06-29 | 上海上力特种电缆有限公司 | Communication cable sheath material and anti-crack communication cable |
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