CN101928426A - High-pressure double-wall heat-shrinkable tube and preparation method thereof - Google Patents
High-pressure double-wall heat-shrinkable tube and preparation method thereof Download PDFInfo
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- CN101928426A CN101928426A CN200910185052XA CN200910185052A CN101928426A CN 101928426 A CN101928426 A CN 101928426A CN 200910185052X A CN200910185052X A CN 200910185052XA CN 200910185052 A CN200910185052 A CN 200910185052A CN 101928426 A CN101928426 A CN 101928426A
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Abstract
The invention relates to a heat-shrinkable tube, in particular to a high-pressure double-wall heat-shrinkable tube and a preparation method thereof. The high-pressure double-wall heat-shrinkable tube consists of an outer wall material and an inner wall material, wherein based on the parts by weight, the outer wall material is composed of 90 parts of first polyolefin mixed resin and 10 parts of first additives, and the inner wall material is composed of 90 parts of second polyolefin mixed resin and 10 parts of second additives. The preparation method comprises the steps of preparing, extruding, irradiating, expanding and molding for the inner wall material and the outer wall material of the double-wall heat-shrinkable tube. Compared with the traditional shrinkable tube, the high-pressure double-wall heat-shrinkable tube has the technical characteristics that the inner wall material is waterproof and sealed, and the outer wall material maintains good electrical property, good chemical property and other properties of the common heat-shrinkable tube, thus having all service performances of the common heat-shrinkable tube as well as performances such as water resistance, tightness, moisture resistance, corrosion resistance and the like, and fully meeting the environmental-protection requirements of ROHS instructions in European Union and other countries; and the heat-shrinkable tube has the advantages of low-temperature shrinkage, three-four-folded stable expansion, low longitudinal shrinking percentage and the like.
Description
One, technical field:
The present invention relates to a kind of heat-shrinkable tube, be specifically related to a kind of high-pressure double-wall heat-shrinkable tube and preparation method thereof.
Two, background technology
Present protection place at insulated circuit; insulation tape, mesolow insulate heat contraction bands or pyrocondensation insulating protection sleeve pipe etc. are adopted in the insulation protection of transmitting line usually, at a lot of occasion construction inconvenience, the especially insulating protections of high-altitude bare wire; use the present invention, quick and easy for installation.
Three, summary of the invention:
Technical purpose
The objective of the invention is for power system provides insulation protection product a kind of easy for installation, safe and reliable,, have good economic benefits and social benefit for the safe operation of power system provides favourable guarantee.
Technical scheme
The present invention has following technical scheme to finish: a kind of high-pressure double-wall heat-shrinkable tube is made up of external wall material and inner wall material, and according to mass fraction, wherein external wall material is by 90 parts of the first polyolefine hybrid resins, and first auxiliary agent is 10 parts of compositions; Inner wall material is by 90 parts of the second polyolefine hybrid resins, 10 parts of compositions of second auxiliary agent;
By mass percentage: the described first polyolefine hybrid resin is the polyolefine hybrid resin that 10～20%EVA630,10～20%EVA421,20～30%EVA283 and four kinds of polyolefine material melt blendings of 30～50%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.
A kind of preparation method of high-pressure double-wall heat-shrinkable tube:
A, the preparation of described high-pressure double-wall heat-shrinkable tube external wall material:
External wall material is by 90 parts of the first polyolefine hybrid resins, and first auxiliary agent is 10 parts of compositions; The first polyolefine hybrid resin is will be according to mass percent: 10～20%EVA630,10～20%EVA421, the polyolefine hybrid resin that four kinds of polyolefine material melt blendings of 20～30%EVA283 and 30～50%EVA220 make, 20 parts of described first auxiliary agents, antioxidant four (β-(3 wherein, the 5-di-tert-butyl-hydroxy phenyl) pentaerythritol ester 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; Change crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, surplus is a paraffin;
The first above-mentioned polyolefine hybrid resin and first auxiliary agent are added Banbury mixer or height stirs 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 high-pressure double-wall heat-shrinkable tube then through the tablets press granulation, standby.
The preparation of B, described high-pressure double-wall heat-shrinkable tube inner wall material:
Press mass fraction, the described second polyolefine hybrid resin is EVA110 and two kinds of polyolefine materials of EVA220 according to 80 parts of the polyolefine hybrid resins that makes than melt blending arbitrarily; 10 parts of described second auxiliary agents, wherein rosin 1-5 part; Antioxidant is four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester 0.5-5 part; Surplus is a DEDB;
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 is 100rpm, and melting temperature is 110～135 ℃, and the high-pressure double-wall heat-shrinkable 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 Nell 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;
F, expansion:
The double wall heat draw pipe 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 high-pressure double-wall heat-shrinkable tube finished product then.
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, 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.
2, 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.
3, 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.
4, 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.
5, 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 high-pressure double-wall heat-shrinkable tube is made up of external wall material and inner wall material, and according to mass fraction, described external wall material is made up of for 10 parts 90 parts of the first polyolefine hybrid resins and first auxiliary agent; Described inner wall material is made up of for 10 parts 90 parts of the second polyolefine hybrid resins and second auxiliary agent;
The described first polyolefine hybrid resin is the polyolefine hybrid resin that 10～20%EVA630,10～20%EVA421,20～30%EVA283 and four kinds of polyolefine material melt blendings of 30～50%EVA220 make by mass percentage, described first auxiliary agent is that antioxidant is 1-3 part, anti copper agent 0.5-1 part, 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.
A kind of preparation method of high-pressure double-wall heat-shrinkable tube:
The preparation of A, external wall material:
Described external wall material is by 90 parts of the first polyolefine hybrid resins, and first auxiliary agent is 10 parts of compositions; The first polyolefine hybrid resin is the polyolefine hybrid resin that 10～20%EVA630,10～20%EVA421,20～30%EVA283 and four kinds of polyolefine material melt blendings of 30～50%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;
The first above-mentioned polyolefine hybrid resin and first auxiliary agent are added Banbury mixer or height stirs machine; stirring the back adds in the twin-screw mixer machine; under 140～160 ℃ temperature condition; through fully stirring and banburying; screw speed is 125rpm, and melting temperature is 110～135 ℃, and each component is fully merged; be prepared into the external wall material of described high-pressure double-wall heat-shrinkable tube then through the tablets press granulation, standby.
The preparation of B, 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 80 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;
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 is 100rpm, and melting temperature is 110～135 ℃, and the high-pressure double-wall heat-shrinkable 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 mass ratio of the consumption 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 twin wall emitter lateral 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 high-pressure double-wall heat-shrinkable tube finished product then.
Embodiment 2
A kind of high-pressure double-wall heat-shrinkable tube is made up of external wall material and inner wall material, and according to mass fraction, described external wall material is made up of for 10 parts 90 parts of the first polyolefine hybrid resins and first auxiliary agent; Described inner wall material is made up of for 10 parts 90 parts of the second polyolefine hybrid resins and second auxiliary agent;
The described first polyolefine hybrid resin is the polyolefine hybrid resin that makes of 10%EVA630,10%EVA421,40%EVA283 and four kinds of polyolefine material melt blendings of 40%EVA220 by mass percentage; Described first auxiliary agent is antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester is 1 part, 1 part of anti copper agent hydroxy-terminated polybutadienes vinyl cyanide fluid rubber, 2 parts of rare earth composite stabilizers (REC-LS-D or REC-LS-F), 3 parts of smoke suppressor zinc borates, 1 part of sensitization crosslinking coagent TriMethylolPropane(TMP), surplus are 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 is 9 parts in described second auxiliary agent, 4 parts of antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol esters, and surplus is a DEDB; A kind of preparation method of high-pressure double-wall heat-shrinkable tube:
The preparation of A, external wall material:
Described external wall material is by 90 parts of the first polyolefine hybrid resins, and first auxiliary agent is 10 parts of compositions; The polyolefine hybrid resin that the first polyolefine hybrid resin makes for 10%EVA630,10%EVA421,40%EVA283 and four kinds of polyolefine material melt blendings of 40%EVA220 by mass percentage; Described first auxiliary agent is antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester is 1 part, 1 part of anti copper agent hydroxy-terminated polybutadienes vinyl cyanide fluid rubber, 2 parts of rare earth composite stabilizers (REC-LS-D or REC-LS-F), 3 parts of smoke suppressor zinc borates, 1 part of sensitization crosslinking coagent TriMethylolPropane(TMP), surplus are paraffin;
The first above-mentioned polyolefine hybrid resin and first auxiliary agent are added Banbury mixer or height stirs machine, stirring the back adds in the twin-screw mixer machine, under 150 ℃ temperature condition, through fully stirring and banburying, screw speed is 125rpm, and melting temperature is 120 ℃, and each component is fully merged, be prepared into the external wall material of described high-pressure double-wall heat-shrinkable tube then through the tablets press granulation, standby;
The preparation of B, 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 80 parts of the polyolefine hybrid resins that makes than melt blending arbitrarily; 10 parts of described second auxiliary agents, wherein rosin is 9 parts, 4 parts of antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol esters, surplus is a DEDB;
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 is 100rpm, and melting temperature is 120 ℃, and the high-pressure double-wall heat-shrinkable 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 mass ratio of the consumption of external wall material and inner wall material: 2: 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 twin wall emitter lateral 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 high-pressure double-wall heat-shrinkable tube finished product then.
Embodiment 3
A kind of high-pressure double-wall heat-shrinkable tube is made up of external wall material and inner wall material, and according to mass fraction, described external wall material is 20 to form by 90 parts of the first polyolefine hybrid resins and first auxiliary agent; Described inner wall material is made up of for 10 parts 90 parts of the second polyolefine hybrid resins and second auxiliary agent;
The described first polyolefine hybrid resin is the polyolefine hybrid resin that makes of 30%EVA630,20%EVA421,40%EVA283 and four kinds of polyolefine material melt blendings of 10%EVA220 by mass percentage; Described first auxiliary agent is antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester is 1 part, 1 part of anti copper agent hydroxy-terminated polybutadienes vinyl cyanide fluid rubber, 2 parts of rare earth composite stabilizers (REC-LS-D or REC-LS-F), 3 parts of smoke suppressor zinc borates, 1 part of sensitization crosslinking coagent TriMethylolPropane(TMP), surplus are 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 9 parts of rosin, 4 parts of antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol esters, and surplus is a DEDB;
A kind of preparation method of high-pressure double-wall heat-shrinkable tube:
The preparation of A, external wall material:
Described external wall material is by 90 parts of the first polyolefine hybrid resins, and first auxiliary agent is 10 parts of compositions; The described first polyolefine hybrid resin is the polyolefine hybrid resin that makes of 30%EVA630,20%EVA421,40%EVA283 and four kinds of polyolefine material melt blendings of 10%EVA220 by mass percentage; Described first auxiliary agent is antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester is 1 part, 1 part of anti copper agent hydroxy-terminated polybutadienes vinyl cyanide fluid rubber, rare earth composite stabilizer (REC-LS-D or REC-LS-F2) part, 3 parts of smoke suppressor zinc borates, 1 part of sensitization crosslinking coagent TriMethylolPropane(TMP), surplus are paraffin;
The first above-mentioned polyolefine hybrid resin and first auxiliary agent added Banbury mixer or through the too high machine that stirs, stirring the back adds in the twin-screw mixer machine, under 150 ℃ temperature condition, through fully stirring and banburying, screw speed is 125rpm, and melting temperature is 120 ℃, and each component is fully merged, be prepared into the external wall material of described high-pressure double-wall heat-shrinkable tube then through the tablets press granulation, standby;
The preparation of B, 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 80 parts of the polyolefine hybrid resins that makes than melt blending arbitrarily; 10 parts of described second auxiliary agents, wherein rosin is 9 parts, 4 parts of antioxidant four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol esters, surplus is a DEDB;
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 is 100rpm, and melting temperature is 120 ℃, and the high-pressure double-wall heat-shrinkable 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 mass ratio of the consumption of external wall material and inner wall material: 2: 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.Pass through the wire coiler rolling again on all rotating disks;
E, expansion:
The twin wall emitter lateral 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 high-pressure double-wall heat-shrinkable tube finished product then.
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. high-pressure double-wall heat-shrinkable tube, it is characterized in that: be made up of external wall material and inner wall material, according to mass fraction, described external wall material is made up of for 10 parts 90 parts of the first polyolefine hybrid resins and first auxiliary agent; Described inner wall material is made up of for 10 parts 90 parts of the second polyolefine hybrid resins and second auxiliary agent;
The described first polyolefine hybrid resin is the polyolefine hybrid resin that 10～20%EVA630,10～20%EVA421,20～30%EVA283 and four kinds of polyolefine material melt blendings of 30～50%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.
2. high-pressure double-wall heat-shrinkable 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. high-pressure double-wall heat-shrinkable 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 10%EVA630,10%EVA421,40%EVA283 and four kinds of polyolefine material melt blendings of 40%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 9 parts of rosin, 4 parts of parts of antioxidant, and surplus is a DEDB.
4. the preparation method of a high-pressure double-wall heat-shrinkable tube is characterized in that:
A. the preparation of external wall material:
Described external wall material is by 90 parts of the first polyolefine hybrid resins, and first auxiliary agent is 10 parts of compositions; The first polyolefine hybrid resin is the polyolefine hybrid resin that 10～20%EVA630,10～20%EVA421,20～30%EVA283 and four kinds of polyolefine material melt blendings of 30～50%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;
The first above-mentioned polyolefine hybrid resin and first auxiliary agent are added Banbury mixer or height stirs 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 high-pressure double-wall heat-shrinkable tube then through the tablets press granulation, standby;
The preparation of B, 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 80 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;
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 high-pressure double-wall heat-shrinkable 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, through the adjustable tension bracket of overtension, in the introducing radiation chamber, 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, be 30～60 circles at the number of times of exposure cell's internal recycle irradiation, through the wire coiler rolling on all rotating disks;
E, expansion:
The high-pressure double-wall heat-shrinkable 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 high-pressure double-wall heat-shrinkable tube finished product then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910185052XA CN101928426A (en) | 2009-10-28 | 2009-10-28 | High-pressure double-wall heat-shrinkable tube and preparation method thereof |
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| CN200910185052XA CN101928426A (en) | 2009-10-28 | 2009-10-28 | High-pressure double-wall heat-shrinkable tube and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254590A (en) * | 2011-03-30 | 2011-11-23 | 山东七星电气科技发展有限公司 | Thermal shrinkable flexible conductive tube and production process thereof |
| CN104882845A (en) * | 2015-05-29 | 2015-09-02 | 深圳市智豪特材科技有限公司 | Special-purpose sealing cap for miniaturized wire harness, and manufacturing method thereof |
| CN106633355A (en) * | 2016-12-28 | 2017-05-10 | 上海长园电子材料有限公司 | Shielding double-layer heat shrinkable casing pipe |
-
2009
- 2009-10-28 CN CN200910185052XA patent/CN101928426A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254590A (en) * | 2011-03-30 | 2011-11-23 | 山东七星电气科技发展有限公司 | Thermal shrinkable flexible conductive tube and production process thereof |
| CN104882845A (en) * | 2015-05-29 | 2015-09-02 | 深圳市智豪特材科技有限公司 | Special-purpose sealing cap for miniaturized wire harness, and manufacturing method thereof |
| CN106633355A (en) * | 2016-12-28 | 2017-05-10 | 上海长园电子材料有限公司 | Shielding double-layer heat shrinkable casing pipe |
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Application publication date: 20101229 |