CN1228417C - Improved oxygen-isolating fire-retardant cable material - Google Patents
Improved oxygen-isolating fire-retardant cable material Download PDFInfo
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- CN1228417C CN1228417C CN 03131873 CN03131873A CN1228417C CN 1228417 C CN1228417 C CN 1228417C CN 03131873 CN03131873 CN 03131873 CN 03131873 A CN03131873 A CN 03131873A CN 1228417 C CN1228417 C CN 1228417C
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Abstract
The present invention relates to improved oxygen-isolating fire-retardant cable material, particularly to a oxygen-isolating fire-retardant cable material with good moulding performance. The present invention is characterized in that the present invention is composed of 30 to 50% (weight) of acetate ethylene copolymer, 3 to 10% of polyethylene, 30 to 55% of magnesium hydroxide, 10 to 35% of aluminum hydroxide, 1 to 5% of antismoke agent 0.2 to 1% of maleic anhydride. The fire-retardant material of the present invention can use usual plastic to, the fire-retardant material which is favorable to transportation and storage is non-toxic, and the storing period is long; even if the fire-retardant material meet with fire and burns, noxious gas can not be generated, better fire-retardant effect is performed in each burning stage, oxygen indexes can reach above 65%, waste material can be recovered to be utilized, and usual plastic squeezing machines to squeeze oxygen-isolating fire-retardant layers of various cables.
Description
Technical field
The present invention relates to a kind of cable oxygen barrier flame-proof material of improvement, the cable oxygen barrier flame-proof material that especially a kind of forming process is good.
Background technology
Chinese patent 99114157 discloses a kind of cable high flame-proofing protective layer material, and it consists of the jelly that 68～70% aluminium hydroxides, 22～24% cured resins, 2.5～4.5% Resins, epoxy, 2.0～3.5% red phosphorus mix.Difficulty is not only stored, transported to this kind flame-proof material owing to be jelly, therefore, and moulding need adopt the mould injection forming, requires the mould complexity; Adopt Resins, epoxy owing in the material in addition, thereby cost is higher relatively; Besides, the aluminium hydroxide fire retardant that single interpolation is relatively large, the flame-proof material flexibility of composition is poor, and embrittlement easily is difficult to extrude moulding with the common plastics forcing machine, thereby makes complicated.Adopt cured resin in the base-material besides, make that side crops can not regeneration, increased use cost.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, provide a kind of shaping characteristic good, can extrude moulding, storage period is long, and is easy to use, and the cable oxygen barrier flame-proof material of recyclable regeneration.
Cable oxygen barrier flame-proof material of the present invention consists of the ethene-vinyl acetate copolymer of 30-50% (weight), the polyethylene of 3-10%, the magnesium hydroxide of 30-55%, the aluminium hydroxide of 10-35%, the smoke suppressor of 1-5%, the maleic anhydride of 0.2-1%.
Ethene-vinyl acetate copolymer of the present invention (EVA) as the moulding base-material, has good toughness, flexibility and stress cracking resistance and cohesiveness, and good relatively flame retardant resistance; The main effect of polyethylene (PE) is that EVA is carried out modification, and both have consistency preferably, can increase the mechanical and physical performance of base-material, as improve tensile strength, the unit elongation of base-material, reduce base-material viscosity, improve extrusion moulding, making it has better toughness at normal temperatures.For improving workability, polyethylene of the present invention better selects for use melt index comparatively suitable about 2g/10min, melt index is too high or too low, all can influence processing forming, too high as melt index, can cause processing temperature to raise, viscosity reducing effect is obvious inadequately, the screw rod extrusion pressure is big, extrudes not smooth; Melt index is low excessively, and material is difficult to slaking and mixes.The present invention adopts magnesium hydroxide and aluminium hydroxide composite anti-flaming agent, can improve the flexibility of material on the one hand, helps improving the material processing forming, secondly both mix, can give full play to flame retardant synergistic effect, can improve flame retardant effect, make in each stage of burning and all can work.Smoke suppressor mainly is to suppress burning to produce black smoke.Maleic anhydride is as coupling agent, and main effect is the interfacial characteristics that improves organic polyolefine and inorganic combustion inhibitor material, thereby improves its bonding properties, improves Chemical bond power, helps strengthening the physical strength of material.Maleic anhydride of the present invention, to adopt MEVA800 ideal, effect is best especially.
Oxygen barrier flame-proof material of the present invention, by common plastic granulating method, each mixing of materials is even, granulation are as using the twin screw extruder extruding pelletization, packing.During use, directly the pellet of making is put into forcing machine and be extruded in the insulated wire cores appearance, constitute flame-retardant layer.
Oxygen barrier flame-proof material of the present invention, owing to adopt flame retardant resistance and all good EVA of workability to make base-material, and carry out modification by polyethylene, not only the modifying material flexibility is good, and can adopt common plastic granulating method, it is standby to make pellet, and extrusion moulding is improved greatly.The application of composite flame-retardant agent has improved flame retardant properties greatly, all can play flame retardant effect preferably in each stage of burning, and oxygen index can reach more than 65.The maleic anhydride coupling agent is greatly improved organic polyolefine and inorganic combustion inhibitor associativity, can strengthen the bonding strength of component material.Oxygen barrier flame-proof material of the present invention, nontoxic, even meet the naked light burning, can not produce toxic gas yet, can granulation, be convenient to transportation, storage period is long, and cost is low, suitability is wide, can extrude moulding with various plastics extruding machines, extrudes simple, the recyclable regeneration of side crops, the oxygen barrier that can be used for various cables is fire-retardant.
Below in conjunction with three indefiniteness embodiment, further specify the present invention and form.
Embodiment
Embodiment 1: get 40 parts of (weight) EVA320,3 parts of PE112A, 44 parts of magnesium hydroxides, 10 parts of aluminium hydroxides, 2.5 parts of smoke suppressors, 0.5 part of maleic anhydride MEVA800.Material weighing is mixed, at the twin screw extruder extruding pelletization.During use, be extruded in the insulated wire cores appearance by the cable plastics machine of extruding, constitute the oxygen barrier flame-retardant layer, oxygen index can reach 65.
Embodiment 2: prescription consists of: 35 parts of EVA-450,5 parts of PE 112A, 39 parts of magnesium hydroxides, 18 parts of aluminium hydroxides, 2.5 parts of smoke suppressors, 0.5 part of maleic anhydride MEVA800.Oxygen index 67.
Embodiment 3: prescription consists of: 30 parts of EVA-450,7 parts of PE WD100,30 parts of magnesium hydroxides, 30 parts of aluminium hydroxides, 2.5 parts of smoke suppressors, 0.5 part of maleic anhydride.Oxygen index 67.5.
Claims (4)
1, a kind of cable oxygen barrier flame-proof material is characterized in that consisting of the ethene-vinyl acetate copolymer of 30-50%wt, the polyethylene of 3-10%, the magnesium hydroxide of 30-55%, the aluminium hydroxide of 10-35%, the smoke suppressor of 1-5%, the maleic anhydride of 0.2-1%.
2,, it is characterized in that said ethene-vinyl acetate copolymer is EVA-450 according to the described cable oxygen barrier of claim 1 flame-proof material.
3,, it is characterized in that said poly melt index is 2g/10min according to the described cable oxygen barrier of claim 1 flame-proof material.
4,, it is characterized in that said maleic anhydride is MEVA800 according to the described cable oxygen barrier of claim 1 flame-proof material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03131873 CN1228417C (en) | 2003-06-10 | 2003-06-10 | Improved oxygen-isolating fire-retardant cable material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03131873 CN1228417C (en) | 2003-06-10 | 2003-06-10 | Improved oxygen-isolating fire-retardant cable material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1468938A CN1468938A (en) | 2004-01-21 |
| CN1228417C true CN1228417C (en) | 2005-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03131873 Expired - Fee Related CN1228417C (en) | 2003-06-10 | 2003-06-10 | Improved oxygen-isolating fire-retardant cable material |
Country Status (1)
| Country | Link |
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| CN (1) | CN1228417C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101853713B (en) * | 2009-04-03 | 2012-07-04 | 上海市高桥电缆厂有限公司 | Flame-retardant filler for cable |
| CN101649084B (en) * | 2009-06-26 | 2011-06-08 | 东华大学 | Halogen-free smoke resistance flame resistance ethylene-vinyl acetate and preparation method thereof |
| CN104008792B (en) * | 2013-05-21 | 2016-07-06 | 远东电缆有限公司 | A kind of production technology of Novel medium voltage fire-resisting cable |
| CN103325473B (en) * | 2013-05-31 | 2017-09-26 | 远东电缆有限公司 | Skyscraper fire resisting low-smoke halogen-free medium voltage crane cable and its production technology |
| CN106349554A (en) * | 2016-08-31 | 2017-01-25 | 欧宝聚合物江苏有限公司 | Low-smoke-amount non-halogen flame-retardant cable compound and preparation method thereof |
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2003
- 2003-06-10 CN CN 03131873 patent/CN1228417C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1468938A (en) | 2004-01-21 |
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