CN101701086A - Semiconducting flame retardant single-wall heat-shrinkable tube and preparation method thereof - Google Patents
Semiconducting flame retardant single-wall heat-shrinkable tube and preparation method thereof Download PDFInfo
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- CN101701086A CN101701086A CN200910185032A CN200910185032A CN101701086A CN 101701086 A CN101701086 A CN 101701086A CN 200910185032 A CN200910185032 A CN 200910185032A CN 200910185032 A CN200910185032 A CN 200910185032A CN 101701086 A CN101701086 A CN 101701086A
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Abstract
The invention relates to a heat-shrinkable tube, in particular to a semiconducting flame retardant single-wall heat-shrinkable tube and a preparation method thereof. The semiconducting flame retardant single-wall heat-shrinkable tube consists of a wall material. In parts by weight, the wall material contains 50 parts of polyolefin mixed resin, 10 parts of graphitized carbon black, 20 parts of assistant and 30 parts of flame retardant. The preparation method comprises the following steps of: preparing the inner and the outer wall materials of the flame retardant single-wall heat-shrinkable tube, extruding, irradiating and expanding molding. Compared with traditional shrinkable tubes, the single-wall heat-shrinkable tube has the technical characteristics that the wall material has the flame retardant performance, the outer layer keeps the characteristics of good electrical properties, chemical properties and the like of common heat-shrinkable tubes; and the single-wall heat-shrinkable tube has all use characteristics of the common heat-shrinkable tubes and also has the performances of water proofing, sealing, moisture proofing, corrosion prevention 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 semiconducting flame retardant single-wall heat-shrinkable tube and preparation method thereof.
Two, background technology
The pyrocondensation product is from being born till now; tempo be we can say and advanced by leaps and bounds; Application Areas is constantly widened, and is mainly used in insulation protection at the beginning of the pyrocondensation products production, is widely used in Aeronautics and Astronautics, boats and ships, automobile, household electrical appliances, communication and field of petrochemical industry till now.The pyrocondensation product plays effects such as anticorrosion, the against shock dislocation of sealed damp-proof, waterproof and circuit to cable junction and bifurcation, therefore both required heat-shrinkable tube that good physicals and electrical property are arranged, as performances such as wearability, shock resistance, insulation strength height; Requiring again simultaneously has good chemical property, as erosion resistance and weathering resistance etc.But common heat-shrink tube can't satisfy these requirements simultaneously, this has just proposed a new problem to us, that be exactly must exploitation be a kind of can waterproof sealing, a kind of novel pyrocondensation product of certain mechanical strength, good electrical properties and chemical property is arranged again.
Three, summary of the invention:
Technical purpose
The purpose of this invention is to provide a kind of twin wall emitter lateral heat-shrinkable tube, certain mechanical strength, good electrical properties and chemical property characteristics are arranged, have fire-retardant heat-shrink tube, good economic benefit and environmental protection benefit again, be fit to apply on a large scale.
Technical scheme
The present invention has following technical scheme to finish: a kind of semiconducting flame retardant single-wall heat-shrinkable tube is made up of the wall material, and according to mass fraction, its mesospore material is that 20 parts and fire retardant are formed for 30 parts by 50 parts of polyolefine hybrid resins, 10 parts of graphitized carbon blacks, auxiliary agent; Described fire retardant is a decabromodiphenyl oxide.
By mass percentage: described 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 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;
A kind of preparation method of semiconducting flame retardant single-wall heat-shrinkable tube:
A, the preparation of described semiconducting flame retardant single-wall heat-shrinkable tube external wall material:
Polyolefine hybrid resin 50 part, the graphitized carbon black 10 part of polyolefine hybrid resin for making according to mass percent: 1～30%EVA630,1～20%EVA421,20～50%EVA283 and four kinds of polyolefine material melt blendings of 10～30%EVA220; 20 parts of described 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 is changed crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, and surplus is a paraffin; Described fire retardant is 30 parts of decabromodiphenyl oxides.
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 semiconducting flame retardant single-wall heat-shrinkable tube then through the tablets press granulation, standby.
B, extrude:
The wall material of steps A preparation is added in the forcing machine, and through extrusion moulding from extruder head behind the fuselage heating and melting, through the tank cooling, wind-force dries up then, behind the surperficial lettering, receives on all rotating disks through tractor;
C, 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;
D, 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 semiconducting flame retardant single-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, added fire retardant in the wall material, flame retardant effect is good.
2, wall material: 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, 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 semiconducting flame retardant single-wall heat-shrinkable tube is made up of the wall material, and according to mass fraction, its mesospore material is that 20 parts and fire retardant are formed for 30 parts by 50 parts of polyolefine hybrid resins, 10 parts of graphitized carbon blacks, auxiliary agent; Described fire retardant is a decabromodiphenyl oxide.
By mass percentage: described 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 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 is changed crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, and surplus is a paraffin;
A kind of preparation method of semiconducting flame retardant single-wall heat-shrinkable tube:
A, the preparation of described semiconducting flame retardant single-wall heat-shrinkable tube external wall material:
Polyolefine hybrid resin 50 part, the graphitized carbon black 10 part of polyolefine hybrid resin for making according to mass percent: 1～30%EVA630,1～20%EVA421,20～50%EVA283 and four kinds of polyolefine material melt blendings of 10～30%EVA220; 20 parts of described 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 is changed crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, and surplus is a paraffin; Described fire retardant is 30 parts of decabromodiphenyl oxides.
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 semiconducting flame retardant single-wall heat-shrinkable tube then through the tablets press granulation, standby.
B, extrude:
The wall material of steps A preparation is added in the forcing machine, and through extrusion moulding from extruder head behind the fuselage heating and melting, through the tank cooling, wind-force dries up then, behind the surperficial lettering, receives on all rotating disks through tractor;
C, 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;
D, 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 semiconducting flame retardant single-wall heat-shrinkable tube finished product then.
Embodiment 2
A kind of semiconducting flame retardant single-wall heat-shrinkable tube is made up of the wall material, and according to mass fraction, its mesospore material is that 20 parts and fire retardant are formed for 30 parts by 50 parts of polyolefine hybrid resins, 10 parts of graphitized carbon blacks, auxiliary agent; Described fire retardant is a decabromodiphenyl oxide.
By mass percentage: described 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%EVA220 make;
Described 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 is changed crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, and surplus is a paraffin;
A kind of preparation method of semiconducting flame retardant single-wall heat-shrinkable tube:
A, the preparation of described semiconducting flame retardant single-wall heat-shrinkable tube external wall material:
Polyolefine hybrid resin 50 part, the graphitized carbon black 10 part of polyolefine hybrid resin for making according to mass percent: 15%EVA630,20%EVA421,45%EVA283 and four kinds of polyolefine material melt blendings of 20%EVA220; 20 parts of described 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 is changed crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, and surplus is a paraffin; Described fire retardant is 30 parts of decabromodiphenyl oxides.
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 semiconducting flame retardant single-wall heat-shrinkable tube then through the tablets press granulation, standby.
B, extrude:
The wall material of steps A preparation is added in the forcing machine, and through extrusion moulding from extruder head behind the fuselage heating and melting, through the tank cooling, wind-force dries up then, behind the surperficial lettering, receives on all rotating disks through tractor;
C, 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;
D, 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 semiconducting flame retardant single-wall heat-shrinkable tube finished product then
Embodiment 3
A kind of semiconducting flame retardant single-wall heat-shrinkable tube is made up of the wall material, and according to mass fraction, its mesospore material is that 20 parts and fire retardant are formed for 30 parts by 50 parts of polyolefine hybrid resins, 10 parts of graphitized carbon blacks, auxiliary agent; Described fire retardant is a decabromodiphenyl oxide.
By mass percentage: described 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 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 is changed crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, and surplus is a paraffin;
A kind of preparation method of semiconducting flame retardant single-wall heat-shrinkable tube:
A, the preparation of described semiconducting flame retardant single-wall heat-shrinkable tube external wall material:
Polyolefine hybrid resin 50 part, the graphitized carbon black 10 part of polyolefine hybrid resin for making according to mass percent: 30%EVA630,20%EVA421,40%EVA283 and four kinds of polyolefine material melt blendings of 10%EVA220; 20 parts of described 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 is changed crosslinking coagent TMP (TriMethylolPropane(TMP)) 1-2 part, and surplus is a paraffin; Described fire retardant is 30 parts of decabromodiphenyl oxides.
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 semiconducting flame retardant single-wall heat-shrinkable tube then through the tablets press granulation, standby.
B, extrude:
The wall material of steps A preparation is added in the forcing machine, and through extrusion moulding from extruder head behind the fuselage heating and melting, through the tank cooling, wind-force dries up then, behind the surperficial lettering, receives on all rotating disks through tractor;
C, 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;
D, 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 semiconducting flame retardant single-wall heat-shrinkable tube finished product then.
Claims (4)
1. semiconducting flame retardant single-wall heat-shrinkable tube, it is characterized in that: be made up of the wall material, according to mass parts, described wall material is made up of for 30 parts 50 parts of polyolefine hybrid resins, 10 parts of graphitized carbon blacks, 20 parts of auxiliary agents and fire retardant; Described 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 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;
Described fire retardant is a decabromodiphenyl oxide.
2. semiconducting flame retardant single-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. semiconducting flame retardant single-wall heat-shrinkable tube according to claim 1 and 2 is characterized in that: described 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 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;
4. the preparation method of a semiconducting flame retardant single-wall heat-shrinkable tube is characterized in that:
A. the preparation of wall material:
Described external wall material is that 20 parts and fire retardant are formed for 30 parts by 50 parts of polyolefine hybrid resins, 10 parts of graphitized carbon blacks, auxiliary agent; The 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; 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; Fire retardant is a decabromodiphenyl oxide;
Above-mentioned raw materials is 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 semiconducting flame retardant single-wall heat-shrinkable tube then through the tablets press granulation, standby;
B, extrude:
The wall material of steps A preparation is added in the forcing machine, and through extrusion moulding from extruder head behind the fuselage heating and melting, through the tank cooling, wind-force dries up then, behind the surperficial lettering, receives on all rotating disks through tractor; The quality amount ratio of external wall material and inner wall material: 1: 1～3: 1;
C, 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;
D, expansion:
The semiconducting flame retardant single-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 semiconducting flame retardant single-wall heat-shrinkable tube 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 semiconducting flame retardant single-wall heat-shrinkable tube finished product then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910185032A CN101701086A (en) | 2009-10-28 | 2009-10-28 | Semiconducting flame retardant single-wall heat-shrinkable tube and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910185032A CN101701086A (en) | 2009-10-28 | 2009-10-28 | Semiconducting flame retardant single-wall heat-shrinkable tube and preparation method thereof |
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| CN101701086A true CN101701086A (en) | 2010-05-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532812A (en) * | 2010-12-16 | 2012-07-04 | 深圳市宏商材料科技股份有限公司 | Diesel oil resistant heat shrinkage sleeve |
-
2009
- 2009-10-28 CN CN200910185032A patent/CN101701086A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532812A (en) * | 2010-12-16 | 2012-07-04 | 深圳市宏商材料科技股份有限公司 | Diesel oil resistant heat shrinkage sleeve |
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Open date: 20100505 |