CN101696301A - Low-voltage halogen-free retarding two-wall heat-shrinkage tube and preparation method thereof - Google Patents
Low-voltage halogen-free retarding two-wall heat-shrinkage tube and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a heat-shrinkage tube, in particular to a low-voltage halogen-free retarding two-wall heat-shrinkage tube and a preparation method thereof. The low-voltage halogen-free retarding two-wall heat-shrinkage tube comprises an outer wall material and an inner wall material, wherein the outer wall material comprises 60 parts by mass of first polyolefin mixed resin, 10 parts by mass of first assistant, 20 parts by mass of fire retardant and 10 parts by mass of auxiliary fire retardant; and the inner wall material comprises 60 parts by mass of second polyolefin mixed resin, 10 parts by mass of second assistant, 20 parts by mass of fire retardant and 10 parts by mass of auxiliary fire retardant. The preparation method comprises the following steps of preparing, extruding, radiating and expanding to form the inner wall material and the outer wall material of the two-wall heat-shrinkage tube. Compared with the traditional heat-shrinkage tube, the invention has the technical characteristics that because the fire retardant and the auxiliary fire retardant are adopted in the raw materials, the low-voltage halogen-free retarding two-wall heat-shrinkage tube has good retarding property, high temperature resistance, better property, no pollution in combustion, cost reduction and remarkable economic and environmental-friendly benefits, and is suitable for massive popularization and application.
Description
One, technical field:
The present invention relates to a kind of heat-shrinkable tube, be specifically related to a kind of low-voltage halogen-free retarding two-wall heat-shrinkage tube and preparation method thereof.
Two, background technology
The thermal contraction double-walled pipe of Xiao Shouing has inside and outside double-layer structure in the market, by by shape memory function through heating can radial shrinkage flame-retardant high-molecular outer and under shrinkage temperature the inside glue-line of melt-flowable form, after heating, inner glue-line melt-flow is filled, can be widely used in Aeronautics and Astronautics, boats and ships, automobile, household electrical appliances, communication, field of petrochemical industry, electric wire junction and bifurcation be played the effect such as anticorrosion, against shock dislocation of fire-retardant, sealed damp-proof, waterproof, circuit.What use in the prescription of layered material outside routine is halogen-containing fire retardant, the time has the height highly toxic drawback of being fuming in burning, causes the secondary disaster of fire easily.Current country is more and more higher to requirement on environmental protection, has adopted not halogen-containing fire retardant in a lot of fields, and the environmental protection organization of EU member country has also delivered the decree that the plastics of forbidding halogen-containing flame retardant enter the European market.But there is shortcoming of low quality, that cost is high or flame retardant effect is bad in the twin wall emitter lateral for halogen-free flame-retardant in the prior art more.
Three, summary of the invention:
Technical purpose
The purpose of this invention is to provide a kind of low-voltage halogen-free retarding two-wall heat-shrinkage tube and preparation method thereof; adopt halogen-free flame retardants in the raw material; the good flame retardation effect of product; high temperature resistant, have a good performance; even it is also pollution-free during burning; cost reduces, and has remarkable economic efficiency and environmental protection benefit, is fit to apply on a large scale.
Technical scheme
The present invention has following technical scheme to finish: a kind of low-voltage halogen-free retarding two-wall heat-shrinkage tube is made up of external wall material and inner wall material, according to mass fraction, wherein external wall material is that 10 parts, 20 parts of fire retardants and auxiliary flame retardant are formed for 10 parts by 60 parts of the first polyolefine hybrid resins, first auxiliary agent; Inner wall material is made up of for 10 parts 60 parts of the second polyolefine hybrid resins, 10 parts of second auxiliary agents, 20 parts of fire retardants and auxiliary flame retardant; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
By mass percentage: the described first polyolefine hybrid resin is the polyolefine hybrid resin that 1～30%EVA630,1～20%EVA421,20～50%EVA283 and four kinds of polyolefine material melt blendings of 10～30%EVA220 make;
Described first auxiliary agent is made up of paraffin, antioxidant, anti copper agent, processing stabilizers and sensitization crosslinking coagent, antioxidant four (β-(3 wherein, the 5-di-tert-butyl-hydroxy phenyl) tetramethylolmethane 1-3 part propionic acid), anti copper agent MDA-1024 (hydroxy-terminated polybutadienes vinyl cyanide fluid rubber) 0.5-1 part, processing stabilizers rare earth composite stabilizer (REC-LS-D or REC-LS-F) 0.02-2 part; Smoke suppressor zinc borate 2-4 part, sensitization crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, surplus is a paraffin;
The described second polyolefine hybrid resin is that EVA110 and two kinds of polyolefine materials of EVA220 are according to the polyolefine hybrid resin that makes than melt blending arbitrarily.
Rosin 1-5 part in described second auxiliary agent, antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester 0.5-5 part, surplus is a DEDB.
Described fire retardant is prepared by following method:
A inserts the super fine magnesium hydroxide powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent A that adopts spray method will account for magnesium hydroxide grain weight amount 3% adds in the powder, makes the abundant coupling modification of powder, makes composition No. 1;
B ultra fine aluminium hydroxide body is inserted in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent B that adopts spray method will account for aluminium hydrate powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 2;
C inserts the ultrafine kaolin powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent C that adopts spray method just to account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 3;
D inserts ultra-fine aluminum silicon powder powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent D that adopts spray method will account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 4;
E is composite with described No. 1 composition, No. 2 compositions, No. 3 compositions and No. 4 components in certain proportion, and the consumption of described three kinds of compositions is, according to mass fraction: 55 parts of No. 1 compositions, 50 parts of No. 2 compositions, 10 parts of No. 3 compositions, 10 parts of No. 4 compositions; And evenly stir, make fire retardant.
Described coupling agent A is a silane coupling agent 550, and coupling agent B is dimethyl silicone oil (a line style polydimethylsiloxane), and coupling agent C is stearic acid (octadecanoic acid), and coupling agent D is titanate coupling agent TC-114 (a tetra-sodium type monoalkoxy class titanic acid ester).
A kind of preparation method of low-voltage halogen-free retarding two-wall heat-shrinkage tube:
A kind of preparation method of low-voltage halogen-free retarding two-wall heat-shrinkage tube is characterized in that:
A. the preparation of external wall material:
Described external wall material is that 10 parts, 20 parts of fire retardants and auxiliary flame retardant are formed for 10 parts by 60 parts of the first polyolefine hybrid resins, first auxiliary agent; The first polyolefine hybrid resin is the polyolefine hybrid resin that 1～30%EVA630,1～20%EVA421,20～50%EVA283 and four kinds of polyolefine material melt blendings of 10～30%EVA220 make by mass percentage; First auxiliary agent is that antioxidant is 1-3 part, anti copper agent 0.5-1 part, and processing stabilizers 0.02-2 part, smoke suppressor 2-4 part, sensitization crosslinking coagent 1-2 part, surplus is a paraffin; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
Above-mentioned raw material adding Banbury mixer or height are stirred machine, stirring the back adds in the twin-screw mixer machine, under 140～160 ℃ temperature condition, through fully stirring and banburying, screw speed 125rpm, 110～135 ℃ of melting temperatures fully merge each component, be prepared into the external wall material of described low-voltage halogen-free retarding two-wall heat-shrinkage tube then through the tablets press granulation, standby;
B. the preparation of inner wall material:
According to mass fraction, the described second polyolefine hybrid resin is EVA110 and two kinds of polyolefine materials of EVA220 according to 53 parts of the polyolefine hybrid resins that makes than melt blending arbitrarily; 10 parts of described second auxiliary agents, rosin 1-5 part wherein, antioxidant is four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester 0.5-5 part, surplus is a DEDB; 20 parts of fire retardants; 10 parts of auxiliary flame retardants; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
Above-mentioned raw materials is added height stir in the machine, stirred 10-20 minute; Add the twin-screw mixer machine then and carry out fully mixingly, screw speed is 100rpm, and melting temperature is 115 ℃, causes particle through tablets press again; In order to make each component mixing evenly, the particle of making is added in the twin-screw mixer machine, mixing once more, screw speed 100rpm, 110～135 ℃ of melting temperatures, the low-voltage halogen-free retarding two-wall heat-shrinkage tube inner wall material is made in granulation then, and is standby;
C. extrude:
The inner wall material of the external wall material of steps A preparation and step B preparation is added into respectively in the two extruders that an angle of 90 degrees puts, through extrusion moulding from shared extruder head behind the fuselage heating and melting, form bilayer structure, then through the tank cooling, wind-force dries up, behind the lettering of surface, receive on all rotating disks through tractor; The quality amount ratio of external wall material and inner wall material: 1: 1～3: 1;
D. irradiation:
All rotating disks are put on the pay off rack,, introduce in the radiation chamber through the adjustable tension bracket of overtension, the present invention adopts irradiation device for electronic accelerator, irradiation dose is 12Mrad, to the twin wall emitter lateral work in-process of making circulate irradiation and cooling, is 30～60 circles at the number of times of exposure cell's internal recycle irradiation.Passing through the wire coiler rolling on all rotating disks;
E. expansion:
The low-voltage halogen-free retarding two-wall heat-shrinkage tube that irradiation is good is placed on the pay off rack, adjust tension force, introduce in the dilator, add through overbalance, after the twin wall emitter lateral work in-process reach 100 ℃ of technological temperatures, introduce Standard Module and expand and cool off, introduce tank then and fully cool off, product temperature is reduced to room temperature, and rolling is packaged into described low-voltage halogen-free retarding two-wall heat-shrinkage tube finished product then;
Wherein said fire retardant is prepared by following method:
A inserts the super fine magnesium hydroxide powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent A that adopts spray method will account for magnesium hydroxide grain weight amount 3% adds in the powder, makes the abundant coupling modification of powder, makes composition No. 1;
B ultra fine aluminium hydroxide body is inserted in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent B that adopts spray method will account for aluminium hydrate powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 2;
C inserts the ultrafine kaolin powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent C that adopts spray method just to account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 3;
D inserts ultra-fine aluminum silicon powder powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent D that adopts spray method will account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 4;
E is composite with described No. 1 composition, No. 2 compositions, No. 3 compositions and No. 4 components in certain proportion, and the consumption of described three kinds of compositions is, according to mass fraction: 55 parts of No. 1 compositions, 50 parts of No. 2 compositions, 10 parts of No. 3 compositions, 10 parts of No. 4 compositions; And evenly stir, make fire retardant.
Described coupling agent A is a silane coupling agent 550, and coupling agent B is dimethyl silicone oil (a line style polydimethylsiloxane), and coupling agent C is stearic acid (octadecanoic acid), and coupling agent D is titanate coupling agent TC-114 (a tetra-sodium type monoalkoxy class titanic acid ester).
The main production equipments inventory
| Machinery or device name | Model specification | The country origin place of production | Rated output |
| Rumbatron | DD | Chinese Shanghai | 2.0Mev |
| Multi-functional irradiation transmission system | / | Chinese Shanghai | 80KW |
| The granulation Banbury mixer | 75L | Chinese Shanghai | 150KW |
| Forcing machine | SJ-120 | The China Zhangjiagang | 123KW |
| Twin screw extruder | TE-70 | Nanjing of China | 75KW |
Principle: because cross-linking radiation changes polyolefinic molecular structure, this variation makes polyolefine have memory effect under certain condition.Heat-shrinkable tube utilizes the principle of this memory effect just, behind the heat-shrinkable tube work in-process cross-linking radiation, with behind its expansion cooling and shaping, is exactly finished product after the heating.In use, the heating back is because memory effect retracts to the preceding state of expansion again.
Beneficial effect:
1, adopt special halogen-free flame retardants in the raw material, the good flame retardation effect of product, high temperature resistant, have good performance, even also pollution-free during burning, cost reduces, and has remarkable economic efficiency and environmental protection benefit, is fit to apply on a large scale.
2, outer wall materials: because the outer main insulation protection effect that plays.So when the outer pipe wall material prescription designed, we had selected intensity higher, the polyolefine that softening temperature is 120～130 ℃ is cooked major ingredient, adds other auxiliary agents of corresponding proportion simultaneously.
3, inner wall material: inner wall material mainly has been the waterproof sealing effect, and therefore certain stripping strength and well mobile will be arranged.The softening temperature of glue will be lower than the heat shrink temperature of external wall material simultaneously, could satisfy production requirement like this.The softening temperature of inner wall material is 70～80 ℃ among the present invention.
4, the technical characterstic internal layer thermosol of the more traditional collapsible tube of this product can waterproof sealing, and outer layered material has kept characteristics such as ordinary hot draw good electrical properties and chemical property, so Application Areas is more extensive.
5, remedied the shortcoming that the ordinary hot collapsible tube can not waterproof sealing.This product possesses whole use propertieies of ordinary hot collapsible tube fully, has also possessed performances such as waterproof sealing moisture-proof anticorrosive simultaneously.
6, this product satisfies the environmental requirement of state ROHS such as European Union instruction fully, has that low temperature shrinks, three times to four times stable expansions, has advantages such as vertical shrinking percentage is low.
Four, embodiment
Embodiment 1
A kind of low-voltage halogen-free retarding two-wall heat-shrinkage tube is made up of external wall material and inner wall material, and according to mass fraction, wherein external wall material is that 10 parts, 20 parts of fire retardants and auxiliary flame retardant are formed for 10 parts by 60 parts of the first polyolefine hybrid resins, first auxiliary agent; Inner wall material is made up of for 10 parts 60 parts of the second polyolefine hybrid resins, 10 parts of second auxiliary agents, 20 parts of fire retardants and auxiliary flame retardant; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
By mass percentage: the described first polyolefine hybrid resin is the polyolefine hybrid resin that 1～30%EVA630,1～20%EVA421,20～50%EVA283 and four kinds of polyolefine material melt blendings of 10～30%EVA220 make;
Described first auxiliary agent is made up of paraffin, antioxidant, anti copper agent, processing stabilizers and sensitization crosslinking coagent, antioxidant four (β-(3 wherein, the 5-di-tert-butyl-hydroxy phenyl) tetramethylolmethane 1-3 part propionic acid), anti copper agent MDA-1024 (hydroxy-terminated polybutadienes vinyl cyanide fluid rubber) 0.5-1 part, processing stabilizers rare earth composite stabilizer (REC-LS-D or REC-LS-F) 0.02-2 part; Smoke suppressor zinc borate 2-4 part, sensitization crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, surplus is a paraffin;
The described second polyolefine hybrid resin is that EVA110 and two kinds of polyolefine materials of EVA220 are according to the polyolefine hybrid resin that makes than melt blending arbitrarily.
Rosin 1-5 part in described second auxiliary agent, antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester 0.5-5 part, surplus is a DEDB.
Described fire retardant is prepared by following method:
A inserts the super fine magnesium hydroxide powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent A that adopts spray method will account for magnesium hydroxide grain weight amount 3% adds in the powder, makes the abundant coupling modification of powder, makes composition No. 1;
B ultra fine aluminium hydroxide body is inserted in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent B that adopts spray method will account for aluminium hydrate powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 2;
C inserts the ultrafine kaolin powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent C that adopts spray method just to account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 3;
D inserts ultra-fine aluminum silicon powder powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent D that adopts spray method will account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 4;
E is composite with described No. 1 composition, No. 2 compositions, No. 3 compositions and No. 4 components in certain proportion, and the consumption of described three kinds of compositions is, according to mass fraction: 55 parts of No. 1 compositions, 50 parts of No. 2 compositions, 10 parts of No. 3 compositions, 10 parts of No. 4 compositions; And evenly stir, make fire retardant.
Described coupling agent A is a silane coupling agent 550, and coupling agent B is dimethyl silicone oil (a line style polydimethylsiloxane), and coupling agent C is stearic acid (octadecanoic acid), and coupling agent D is titanate coupling agent TC-114 (a tetra-sodium type monoalkoxy class titanic acid ester).
A kind of preparation method of low-voltage halogen-free retarding two-wall heat-shrinkage tube,
A. the preparation of external wall material:
Described external wall material is that 10 parts, 20 parts of fire retardants and auxiliary flame retardant are formed for 10 parts by 60 parts of the first polyolefine hybrid resins, first auxiliary agent; The first polyolefine hybrid resin is the polyolefine hybrid resin that 1～30%EVA630,1～20%EVA421,20～50%EVA283 and four kinds of polyolefine material melt blendings of 10～30%EVA220 make by mass percentage; First auxiliary agent is that antioxidant is 1-3 part, anti copper agent 0.5-1 part, and processing stabilizers 0.02-2 part, smoke suppressor 2-4 part, sensitization crosslinking coagent 1-2 part, surplus is a paraffin; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
Above-mentioned raw material adding Banbury mixer or height are stirred machine, stirring the back adds in the twin-screw mixer machine, under 140～160 ℃ temperature condition, through fully stirring and banburying, screw speed 125rpm, 110～135 ℃ of melting temperatures fully merge each component, be prepared into the external wall material of described low-voltage halogen-free retarding two-wall heat-shrinkage tube then through the tablets press granulation, standby;
B. the preparation of inner wall material:
According to mass fraction, the described second polyolefine hybrid resin is EVA110 and two kinds of polyolefine materials of EVA220 according to 53 parts of the polyolefine hybrid resins that makes than melt blending arbitrarily; 10 parts of described second auxiliary agents, rosin 1-15 part wherein, antioxidant is four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester 0.5-5 part, surplus is a DEDB; 20 parts of fire retardants; 10 parts of auxiliary flame retardants; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
Above-mentioned raw materials is added height stir in the machine, stirred 10-20 minute; Add the twin-screw mixer machine then and carry out fully mixingly, screw speed is 100rpm, and melting temperature is 115 ℃, causes particle through tablets press again; In order to make each component mixing evenly, the particle of making is added in the twin-screw mixer machine, mixing once more, screw speed 100rpm, 110～135 ℃ of melting temperatures, the low-voltage halogen-free retarding two-wall heat-shrinkage tube inner wall material is made in granulation then, and is standby;
C. extrude:
The inner wall material of the external wall material of steps A preparation and step B preparation is added into respectively in the two extruders that an angle of 90 degrees puts, through extrusion moulding from shared extruder head behind the fuselage heating and melting, form bilayer structure, then through the tank cooling, wind-force dries up, behind the lettering of surface, receive on all rotating disks through tractor; The quality amount ratio of external wall material and inner wall material: 1: 1～3: 1;
D. irradiation:
All rotating disks are put on the pay off rack,, introduce in the radiation chamber through the adjustable tension bracket of overtension, the present invention adopts irradiation device for electronic accelerator, irradiation dose is 12Mrad, to the twin wall emitter lateral work in-process of making circulate irradiation and cooling, is 30～60 circles at the number of times of exposure cell's internal recycle irradiation.Passing through the wire coiler rolling on all rotating disks;
E. expansion:
The low-voltage halogen-free retarding two-wall heat-shrinkage tube that irradiation is good is placed on the pay off rack, adjust tension force, introduce in the dilator, add through overbalance, after the twin wall emitter lateral work in-process reach 100 ℃ of technological temperatures, introduce Standard Module and expand and cool off, introduce tank then and fully cool off, product temperature is reduced to room temperature, and rolling is packaged into described low-voltage halogen-free retarding two-wall heat-shrinkage tube finished product then;
Wherein said fire retardant is prepared by following method:
A inserts the super fine magnesium hydroxide powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent A that adopts spray method will account for magnesium hydroxide grain weight amount 3% adds in the powder, makes the abundant coupling modification of powder, makes composition No. 1;
B ultra fine aluminium hydroxide body is inserted in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent B that adopts spray method will account for aluminium hydrate powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 2;
C inserts the ultrafine kaolin powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent C that adopts spray method just to account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 3;
D inserts ultra-fine aluminum silicon powder powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent D that adopts spray method will account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 4;
E is composite with described No. 1 composition, No. 2 compositions, No. 3 compositions and No. 4 components in certain proportion, and the consumption of described three kinds of compositions is, according to mass fraction: 55 parts of No. 1 compositions, 50 parts of No. 2 compositions, 10 parts of No. 3 compositions, 10 parts of No. 4 compositions; And evenly stir, make fire retardant.
Described coupling agent A is a silane coupling agent 550, and coupling agent B is dimethyl silicone oil (a line style polydimethylsiloxane), and coupling agent C is stearic acid (octadecanoic acid), and coupling agent D is titanate coupling agent TC-114 (a tetra-sodium type monoalkoxy class titanic acid ester).
Embodiment 2
A kind of low-voltage halogen-free retarding two-wall heat-shrinkage tube is made up of external wall material and inner wall material, and according to mass fraction, wherein external wall material is that 10 parts, 20 parts of fire retardants and auxiliary flame retardant are formed for 10 parts by 60 parts of the first polyolefine hybrid resins, first auxiliary agent; Inner wall material is made up of 60 parts of the second polyolefine hybrid resins, 10 parts of second auxiliary agents, 20 parts of fire retardants and auxiliary flame retardant; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
By mass percentage: the described first polyolefine hybrid resin is the polyolefine hybrid resin that 15%EVA630,20%EVA421,45%EVA283 and four kinds of polyolefine material melt blendings of 20%EVA2200 make;
Described first auxiliary agent is made up of paraffin, antioxidant, anti copper agent, processing stabilizers and sensitization crosslinking coagent, antioxidant four (β-(3 wherein, the 5-di-tert-butyl-hydroxy phenyl) tetramethylolmethane 1-3 part propionic acid), anti copper agent MDA-1024 (hydroxy-terminated polybutadienes vinyl cyanide fluid rubber) 0.5-1 part, processing stabilizers rare earth composite stabilizer (REC-LS-D or REC-LS-F) 0.02-2 part; Smoke suppressor zinc borate 2-4 part, sensitization crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, surplus is a paraffin;
The described second polyolefine hybrid resin is that EVA110 and two kinds of polyolefine materials of EVA220 are according to the polyolefine hybrid resin that makes than melt blending arbitrarily.
Rosin 1-5 part in described second auxiliary agent, antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester 0.5-5 part, surplus is a DEDB.
Described fire retardant is prepared by following method:
A inserts the super fine magnesium hydroxide powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent A that adopts spray method will account for magnesium hydroxide grain weight amount 3% adds in the powder, makes the abundant coupling modification of powder, makes composition No. 1;
B ultra fine aluminium hydroxide body is inserted in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent B that adopts spray method will account for aluminium hydrate powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 2;
C inserts the ultrafine kaolin powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent C that adopts spray method just to account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 3;
D inserts ultra-fine aluminum silicon powder powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent D that adopts spray method will account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 4;
E is composite with described No. 1 composition, No. 2 compositions, No. 3 compositions and No. 4 components in certain proportion, and the consumption of described three kinds of compositions is, according to mass fraction: 55 parts of No. 1 compositions, 50 parts of No. 2 compositions, 10 parts of No. 3 compositions, 10 parts of No. 4 compositions; And evenly stir, make fire retardant.
Described coupling agent A is a silane coupling agent 550, and coupling agent B is dimethyl silicone oil (a line style polydimethylsiloxane), and coupling agent C is stearic acid (octadecanoic acid), and coupling agent D is titanate coupling agent TC-114 (a tetra-sodium type monoalkoxy class titanic acid ester).
A kind of preparation method of low-voltage halogen-free retarding two-wall heat-shrinkage tube is characterized in that:
A. the preparation of external wall material:
Described external wall material is that 10 parts and ignition dope are formed for 37 parts by 53 parts of the first polyolefine hybrid resins, first auxiliary agent; The polyolefine hybrid resin that the first polyolefine hybrid resin makes for 15%EVA630,20%EVA421,45%EVA283 and four kinds of polyolefine material melt blendings of 20%EVA220 by mass percentage; First auxiliary agent is that antioxidant is 1-3 part, anti copper agent 0.5-1 part, and processing stabilizers 0.02-2 part, smoke suppressor 2-4 part, sensitization crosslinking coagent 1-2 part, surplus is a paraffin; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide; Above-mentioned raw material adding Banbury mixer or height are stirred machine, stirring the back adds in the twin-screw mixer machine, under 140～160 ℃ temperature condition, through fully stirring and banburying, screw speed 125rpm, 110～135 ℃ of melting temperatures fully merge each component, be prepared into the external wall material of described low-voltage halogen-free retarding two-wall heat-shrinkage tube then through the tablets press granulation, standby;
B. the preparation of inner wall material:
According to mass fraction, the described second polyolefine hybrid resin is EVA110 and two kinds of polyolefine materials of EVA220 according to 53 parts of the polyolefine hybrid resins that makes than melt blending arbitrarily; 10 parts of described second auxiliary agents, rosin 1-10 part wherein, antioxidant is four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester 0.5-5 part, surplus is a DEDB; Fire retardant is 37 parts; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
Above-mentioned second polyolefine hybrid resin and second auxiliary agent adding height are stirred in the machine, stirred 10-20 minute; Add the twin-screw mixer machine then and carry out fully mixingly, screw speed is 100rpm, and melting temperature is 115 ℃, causes particle through tablets press again; In order to make each component mixing evenly, the particle of making is added in the twin-screw mixer machine, mixing once more, screw speed 100rpm, 110～135 ℃ of melting temperatures, the low-voltage halogen-free retarding two-wall heat-shrinkage tube inner wall material is made in granulation then, and is standby;
C. extrude:
The inner wall material of the external wall material of steps A preparation and step B preparation is added into respectively in the two extruders that an angle of 90 degrees puts, through extrusion moulding from shared extruder head behind the fuselage heating and melting, form bilayer structure, then through the tank cooling, wind-force dries up, behind the lettering of surface, receive on all rotating disks through tractor; The quality amount ratio of external wall material and inner wall material: 1: 1～3: 1;
D. irradiation:
All rotating disks are put on the pay off rack,, introduce in the radiation chamber through the adjustable tension bracket of overtension, the present invention adopts irradiation device for electronic accelerator, irradiation dose is 12Mrad, to the twin wall emitter lateral work in-process of making circulate irradiation and cooling, is 30～60 circles at the number of times of exposure cell's internal recycle irradiation.Passing through the wire coiler rolling on all rotating disks;
E. expansion:
The low-voltage halogen-free retarding two-wall heat-shrinkage tube that irradiation is good is placed on the pay off rack, adjust tension force, introduce in the dilator, add through overbalance, after the twin wall emitter lateral work in-process reach 100 ℃ of technological temperatures, introduce Standard Module and expand and cool off, introduce tank then and fully cool off, product temperature is reduced to room temperature, and rolling is packaged into described low-voltage halogen-free retarding two-wall heat-shrinkage tube finished product then;
Wherein said fire retardant is prepared by following method:
A inserts the super fine magnesium hydroxide powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent A that adopts spray method will account for magnesium hydroxide grain weight amount 3% adds in the powder, makes the abundant coupling modification of powder, makes composition No. 1;
B ultra fine aluminium hydroxide body is inserted in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent B that adopts spray method will account for aluminium hydrate powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 2;
C inserts the ultrafine kaolin powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent C that adopts spray method just to account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 3;
D inserts ultra-fine aluminum silicon powder powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent D that adopts spray method will account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 4;
E is composite with described No. 1 composition, No. 2 compositions, No. 3 compositions and No. 4 components in certain proportion, and the consumption of described three kinds of compositions is, according to mass fraction: 55 parts of No. 1 compositions, 50 parts of No. 2 compositions, 10 parts of No. 3 compositions, 10 parts of No. 4 compositions; And evenly stir, make fire retardant.
Described coupling agent A is a silane coupling agent 550, and coupling agent B is dimethyl silicone oil (a line style polydimethylsiloxane), and coupling agent C is stearic acid (octadecanoic acid), and coupling agent D is titanate coupling agent TC-114 (a tetra-sodium type monoalkoxy class titanic acid ester).
Embodiment 3
A kind of low-voltage halogen-free retarding two-wall heat-shrinkage tube is made up of external wall material and inner wall material, and according to mass fraction, wherein external wall material is that 10 parts, 20 parts of fire retardants and auxiliary flame retardant are formed for 10 parts by 60 parts of the first polyolefine hybrid resins, first auxiliary agent; Inner wall material is made up of for 10 parts 53 parts of the second polyolefine hybrid resins, 10 parts of second auxiliary agents, 20 parts of fire retardants and auxiliary flame retardant; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
By mass percentage: the described first polyolefine hybrid resin is the polyolefine hybrid resin that 30%EVA630,20%EVA421,40%EVA283 and four kinds of polyolefine material melt blendings of 10%EVA220 make;
Described first auxiliary agent is made up of paraffin, antioxidant, anti copper agent, processing stabilizers and sensitization crosslinking coagent, antioxidant four (β-(3 wherein, the 5-di-tert-butyl-hydroxy phenyl) tetramethylolmethane 1-3 part propionic acid), anti copper agent MDA-1024 (hydroxy-terminated polybutadienes vinyl cyanide fluid rubber) 0.5-1 part, processing stabilizers rare earth composite stabilizer (REC-LS-D or REC-LS-F) 0.02-2 part; Smoke suppressor zinc borate 2-4 part, sensitization crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, surplus is a paraffin;
The described second polyolefine hybrid resin is that EVA110 and two kinds of polyolefine materials of EVA220 are according to the polyolefine hybrid resin that makes than melt blending arbitrarily.
Rosin 1-5 part in described second auxiliary agent, antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester 0.5-5 part, surplus is a DEDB.
Described fire retardant is prepared by following method:
A inserts the super fine magnesium hydroxide powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent A that adopts spray method will account for magnesium hydroxide grain weight amount 3% adds in the powder, makes the abundant coupling modification of powder, makes composition No. 1;
B ultra fine aluminium hydroxide body is inserted in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent B that adopts spray method will account for aluminium hydrate powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 2;
C inserts the ultrafine kaolin powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent C that adopts spray method just to account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 3;
D inserts ultra-fine aluminum silicon powder powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent D that adopts spray method will account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 4;
E is composite with described No. 1 composition, No. 2 compositions, No. 3 compositions and No. 4 components in certain proportion, and the consumption of described three kinds of compositions is, according to mass fraction: 55 parts of No. 1 compositions, 50 parts of No. 2 compositions, 10 parts of No. 3 compositions, 10 parts of No. 4 compositions; And evenly stir, make fire retardant.
Described coupling agent A is a silane coupling agent 550, and coupling agent B is dimethyl silicone oil (a line style polydimethylsiloxane), and coupling agent C is stearic acid (octadecanoic acid), and coupling agent D is titanate coupling agent TC-114 (a tetra-sodium type monoalkoxy class titanic acid ester).A kind of preparation method of low-voltage halogen-free retarding two-wall heat-shrinkage tube is characterized in that:
A. the preparation of external wall material:
Described external wall material is that 10 parts, 20 parts of fire retardants and auxiliary flame retardant are formed for 10 parts by 60 parts of the first polyolefine hybrid resins, first auxiliary agent; The polyolefine hybrid resin that the first polyolefine hybrid resin makes for 30%EVA630,20%EVA421,40%EVA283 and four kinds of polyolefine material melt blendings of 10%EVA220 by mass percentage; First auxiliary agent is that antioxidant is 1-3 part, anti copper agent 0.5-1 part, and processing stabilizers 0.02-2 part, smoke suppressor 2-4 part, sensitization crosslinking coagent 1-2 part, surplus is a paraffin; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
Above-mentioned raw material adding Banbury mixer or height are stirred machine, stirring the back adds in the twin-screw mixer machine, under 140～160 ℃ temperature condition, through fully stirring and banburying, screw speed 125rpm, 110～135 ℃ of melting temperatures fully merge each component, be prepared into the external wall material of described low-voltage halogen-free retarding two-wall heat-shrinkage tube then through the tablets press granulation, standby;
B. the preparation of inner wall material:
According to mass fraction, the described second polyolefine hybrid resin is EVA110 and two kinds of polyolefine materials of EVA220 according to 53 parts of the polyolefine hybrid resins that makes than melt blending arbitrarily; 10 parts of described second auxiliary agents, rosin 1-5 part wherein, antioxidant is four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester 0.5-5 part, surplus is a DEDB; Fire retardant is 37 parts; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
Above-mentioned second polyolefine hybrid resin and second auxiliary agent adding height are stirred in the machine, stirred 10-20 minute; Add the twin-screw mixer machine then and carry out fully mixingly, screw speed is 100rpm, and melting temperature is 115 ℃, causes particle through tablets press again; In order to make each component mixing evenly, the particle of making is added in the twin-screw mixer machine, mixing once more, screw speed 100rpm, 110～135 ℃ of melting temperatures, the low-voltage halogen-free retarding two-wall heat-shrinkage tube inner wall material is made in granulation then, and is standby;
C. extrude:
The inner wall material of the external wall material of steps A preparation and step B preparation is added into respectively in the two extruders that an angle of 90 degrees puts, through extrusion moulding from shared extruder head behind the fuselage heating and melting, form bilayer structure, then through the tank cooling, wind-force dries up, behind the lettering of surface, receive on all rotating disks through tractor; The quality amount ratio of external wall material and inner wall material: 1: 1～3: 1;
D. irradiation:
All rotating disks are put on the pay off rack,, introduce in the radiation chamber through the adjustable tension bracket of overtension, the present invention adopts irradiation device for electronic accelerator, irradiation dose is 12Mrad, to the twin wall emitter lateral work in-process of making circulate irradiation and cooling, is 30～60 circles at the number of times of exposure cell's internal recycle irradiation.Passing through the wire coiler rolling on all rotating disks;
E. expansion:
The low-voltage halogen-free retarding two-wall heat-shrinkage tube that irradiation is good is placed on the pay off rack, adjust tension force, introduce in the dilator, add through overbalance, after the twin wall emitter lateral work in-process reach 100 ℃ of technological temperatures, introduce Standard Module and expand and cool off, introduce tank then and fully cool off, product temperature is reduced to room temperature, and rolling is packaged into described low-voltage halogen-free retarding two-wall heat-shrinkage tube finished product then;
Wherein said fire retardant is prepared by following method:
A inserts the super fine magnesium hydroxide powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent A that adopts spray method will account for magnesium hydroxide grain weight amount 3% adds in the powder, makes the abundant coupling modification of powder, makes composition No. 1;
B ultra fine aluminium hydroxide body is inserted in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent B that adopts spray method will account for aluminium hydrate powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 2;
C inserts the ultrafine kaolin powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent C that adopts spray method just to account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 3;
D inserts ultra-fine aluminum silicon powder powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent D that adopts spray method will account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 4;
E is composite with described No. 1 composition, No. 2 compositions, No. 3 compositions and No. 4 components in certain proportion, and the consumption of described three kinds of compositions is, according to mass fraction: 55 parts of No. 1 compositions, 50 parts of No. 2 compositions, 10 parts of No. 3 compositions, 10 parts of No. 4 compositions; And evenly stir, make fire retardant.
Described coupling agent A is a silane coupling agent 550, and coupling agent B is dimethyl silicone oil (a line style polydimethylsiloxane), and coupling agent C is stearic acid (octadecanoic acid), and coupling agent D is titanate coupling agent TC-114 (a tetra-sodium type monoalkoxy class titanic acid ester).
Embodiment 4
Embodiment 1,2 and 3 described product material smoke density performances meet ASTM E662, the hydrogen halide content performance meets IEC754-1, over-all properties reaches DL413-91 " 35kV and following power cable thermal contraction type accessory application technical qualification " ', and the cable accessory performance reaches GB11033-89 " voltage rating 26/35kV and following electric cable fitting basic fundamental require ".
Claims (4)
1. low-voltage halogen-free retarding two-wall heat-shrinkage tube, it is characterized in that: form by external wall material and inner wall material, according to mass fraction, described external wall material is made up of for 10 parts 60 parts of the first polyolefine hybrid resins, 10 parts of first auxiliary agents, 20 parts of fire retardants and auxiliary flame retardant; Described inner wall material is made up of for 10 parts 60 parts of the second polyolefine hybrid resins, 10 parts of second auxiliary agents, 20 parts of fire retardants and auxiliary flame retardant;
The described first polyolefine hybrid resin is the polyolefine hybrid resin that 1～30%EVA630,1～20%EVA421,20～50%EVA283 and four kinds of polyolefine material melt blendings of 10～30%EVA220 make by mass percentage; Described first auxiliary agent is that antioxidant is 1-3 part, anti copper agent 0.5-1 part, and processing stabilizers 0.02-2 part, smoke suppressor 2-4 part, sensitization crosslinking coagent 1-2 part, surplus is a paraffin;
The described second polyolefine hybrid resin is that EVA110 and two kinds of polyolefine materials of EVA220 are according to the polyolefine hybrid resin that makes than melt blending arbitrarily; Described second auxiliary agent is rosin 1-5 part, antioxidant 0.5-5 part, and surplus is a DEDB; Auxiliary flame retardant is aluminium hydroxide or magnesium hydroxide;
Described fire retardant is prepared by following method:
A inserts the super fine magnesium hydroxide powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent A that adopts spray method will account for magnesium hydroxide grain weight amount 3% adds in the powder, makes the abundant coupling modification of powder, makes composition No. 1;
B ultra fine aluminium hydroxide body is inserted in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent B that adopts spray method will account for aluminium hydrate powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 2;
C inserts the ultrafine kaolin powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent C that adopts spray method just to account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 3;
D inserts ultra-fine aluminum silicon powder powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent D that adopts spray method will account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 4;
E is composite with described No. 1 composition, No. 2 compositions, No. 3 compositions and No. 4 components in certain proportion, and the consumption of described three kinds of compositions is, according to mass fraction: 55 parts of No. 1 compositions, 50 parts of No. 2 compositions, 10 parts of No. 3 compositions, 10 parts of No. 4 compositions; And evenly stir, make fire retardant.
Described coupling agent A is a silane coupling agent 550, and coupling agent B is the line style polydimethylsiloxane, and coupling agent C is an octadecanoic acid, and coupling agent D is a tetra-sodium type monoalkoxy class titanic acid ester.
2. low-voltage halogen-free retarding two-wall heat-shrinkage tube according to claim 1 is characterized in that: described antioxidant is four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester; Anti copper agent is a hydroxy-terminated polybutadienes vinyl cyanide fluid rubber; Processing stabilizers is rare-earth stabilizer REC-LS-D or REC-LS-F; Smoke suppressor is a zinc borate; The sensitization crosslinking coagent is a TriMethylolPropane(TMP).
3. low-voltage halogen-free retarding two-wall heat-shrinkage tube according to claim 1 and 2 is characterized in that: the described first polyolefine hybrid resin is the polyolefine hybrid resin that makes of 15%EVA630,20%EVA421,45%EVA283 and four kinds of polyolefine material melt blendings of 20%EVA220 by mass percentage; Described first auxiliary agent is that antioxidant is 1 part, 1 part of anti copper agent, and 2 parts of processing stabilizers, 3 parts of smoke suppressors, 1 part of sensitization crosslinking coagent, surplus is a paraffin; The described second polyolefine hybrid resin is that EVA110 and two kinds of polyolefine materials of EVA220 are according to the polyolefine hybrid resin that makes than melt blending arbitrarily; Described second auxiliary agent is 5 parts of rosin, 4 parts of parts of antioxidant, and surplus is a DEDB.
4. the preparation method of a low-voltage halogen-free retarding two-wall heat-shrinkage tube is characterized in that:
A. the preparation of external wall material:
Described external wall material is that 10 parts and ignition dope are formed for 37 parts by 53 parts of the first polyolefine hybrid resins, first auxiliary agent; The first polyolefine hybrid resin is the polyolefine hybrid resin that 1～30%EVA630,1～20%EVA421,20～50%EVA283 and four kinds of polyolefine material melt blendings of 10～30%EVA220 make by mass percentage; First auxiliary agent is that antioxidant is 1-3 part, anti copper agent 0.5-1 part, and processing stabilizers 0.02-2 part, smoke suppressor 2-4 part, sensitization crosslinking coagent 1-2 part, surplus is a paraffin;
Above-mentioned raw material adding Banbury mixer or height are stirred machine, stirring the back adds in the twin-screw mixer machine, under 140～160 ℃ temperature condition, through fully stirring and banburying, screw speed 125rpm, 110～135 ℃ of melting temperatures fully merge each component, be prepared into the external wall material of described low-voltage halogen-free retarding two-wall heat-shrinkage tube then through the tablets press granulation, standby;
B. the preparation of inner wall material:
According to mass fraction, the described second polyolefine hybrid resin is EVA110 and two kinds of polyolefine materials of EVA220 according to 53 parts of the polyolefine hybrid resins that makes than melt blending arbitrarily; 10 parts of described second auxiliary agents, rosin 1-5 part wherein, antioxidant is four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester 0.5-5 part, surplus is a DEDB; Fire retardant is 37 parts;
Above-mentioned raw materials is added height stir in the machine, stirred 10-20 minute; Add the twin-screw mixer machine then and carry out fully mixingly, screw speed is 100rpm, and melting temperature is 115 ℃, causes particle through tablets press again; In order to make each component mixing evenly, the particle of making is added in the twin-screw mixer machine, mixing once more, screw speed 100rpm, 110～135 ℃ of melting temperatures, the low-voltage halogen-free retarding two-wall heat-shrinkage tube inner wall material is made in granulation then, and is standby;
C. extrude:
The inner wall material of the external wall material of steps A preparation and step B preparation is added into respectively in the two extruders that an angle of 90 degrees puts, through extrusion moulding from shared extruder head behind the fuselage heating and melting, form bilayer structure, then through the tank cooling, wind-force dries up, behind the lettering of surface, receive on all rotating disks through tractor; The quality amount ratio of external wall material and inner wall material: 1: 1～3: 1;
D. irradiation:
All rotating disks are put on the pay off rack,, introduce in the radiation chamber through the adjustable tension bracket of overtension, the present invention adopts irradiation device for electronic accelerator, irradiation dose is 12Mrad, to the twin wall emitter lateral work in-process of making circulate irradiation and cooling, is 30～60 circles at the number of times of exposure cell's internal recycle irradiation.Passing through the wire coiler rolling on all rotating disks;
E. expansion:
The low-voltage halogen-free retarding two-wall heat-shrinkage tube that irradiation is good is placed on the pay off rack, adjust tension force, introduce in the dilator, add through overbalance, after the twin wall emitter lateral work in-process reach 100 ℃ of technological temperatures, introduce Standard Module and expand and cool off, introduce tank then and fully cool off, product temperature is reduced to room temperature, and rolling is packaged into described low-voltage halogen-free retarding two-wall heat-shrinkage tube finished product then;
Wherein said fire retardant is prepared by following method:
A inserts the super fine magnesium hydroxide powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent A that adopts spray method will account for magnesium hydroxide grain weight amount 3% adds in the powder, makes the abundant coupling modification of powder, makes composition No. 1;
B ultra fine aluminium hydroxide body is inserted in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent B that adopts spray method will account for aluminium hydrate powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 2;
C inserts the ultrafine kaolin powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent C that adopts spray method just to account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 3;
D inserts ultra-fine aluminum silicon powder powder in the homogenizer, evenly stirs and be heated to 105～120 ℃, and the coupling agent D that adopts spray method will account for kaolin powder weight 3% adds in the powder, makes the abundant coupling of powder, makes composition No. 4;
E is composite with described No. 1 composition, No. 2 compositions, No. 3 compositions and No. 4 components in certain proportion, and the consumption of described three kinds of compositions is, according to mass fraction: 55 parts of No. 1 compositions, 50 parts of No. 2 compositions, 10 parts of No. 3 compositions, 10 parts of No. 4 compositions; And evenly stir, make fire retardant.
Described coupling agent A is a silane coupling agent 550, and coupling agent B is the line style polydimethylsiloxane, and coupling agent C is an octadecanoic acid, and coupling agent D is a tetra-sodium type monoalkoxy class titanic acid ester.
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|---|---|---|---|
| CN2009101850515A CN101696301B (en) | 2009-10-28 | 2009-10-28 | Low-voltage halogen-free retarding two-wall heat-shrinkage tube and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106207935A (en) * | 2016-08-22 | 2016-12-07 | 长春市宇程机电有限公司 | The insulation protecting device of distribution transmission line and electric power means of defence |
| CN108215237A (en) * | 2018-02-26 | 2018-06-29 | 蒋丰亮 | A kind of material for PE heavy caliber fiber reinforcement pipelines squeezes out and molding press device |
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2009
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106207935A (en) * | 2016-08-22 | 2016-12-07 | 长春市宇程机电有限公司 | The insulation protecting device of distribution transmission line and electric power means of defence |
| CN108215237A (en) * | 2018-02-26 | 2018-06-29 | 蒋丰亮 | A kind of material for PE heavy caliber fiber reinforcement pipelines squeezes out and molding press device |
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