CN101492553A - High-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin and uses thereof - Google Patents
High-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin and uses thereof Download PDFInfo
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- CN101492553A CN101492553A CNA2008100195165A CN200810019516A CN101492553A CN 101492553 A CN101492553 A CN 101492553A CN A2008100195165 A CNA2008100195165 A CN A2008100195165A CN 200810019516 A CN200810019516 A CN 200810019516A CN 101492553 A CN101492553 A CN 101492553A
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Abstract
The invention relates to the improvement of non-halogen low-smoke inflaming retarding polyolefine, which is characterized in that 20-70 parts of PE, 30-80 parts of EVA, 80-110 parts of Mg(OH)2, 30-55wt% of surface active agent, 45-70wt% of fatty acid soap and/or 2-5 parts of dispersant consisting of palmitic acid soap and/or oleate soap, and 5-15 parts of RP. Compared with the prior art, the inflaming retarding polyolefine can obviously increase the dispersive performance of inorganic flame retardants and the binding ability with binders, greatly reduces the use level of the flame retardants which is only about 1/2 of the former; the elongation at break thereof can reach as much as 550 and the index of swealing is more than or equal to 20; the non-halogen low-smoke inflaming retarding polyolefine increases the plastic working of materials, reduces the stress of a molding heat machine, basically removes the influence of the inorganic flame retardants on the elongation at break and the index of swealing reduction, and effectively solves the foundation reason of the cracking; secondly, the density of the polyolefine is low and not more than 1.29; the cost can be reduced by 10-20%. The non-halogen low-smoke inflaming retarding polyolefine not only can be used in various inflaming retarding soft product products, in particular to be used as cable insulation and/or a sheath, and effectively solves the industry long-standing problem that the inflaming retarding polyolefine insulation and the sheath easily crack.
Description
Technical field
The present invention is the improvement to halogen-free and low-smoke flame-retardant polyolefin, relates in particular to the good halogen-free and low-smoke flame-retardant polyolefin of high-tensile stretch dehiscence-resistant, and the application in cable.
Background technology
Halogen-free and low-smoke flame-retardant polyolefin plastics (for example being mixed into base-material with polyethylene (PE)) with polyethylene (PE) or polyethylene vinylacetate (EVA), for obtaining good flame retardant resistance, and reach the Halogen requirement, adopt to add to surpass base-material (for example 150～200 parts) magnesium hydroxide (Mg (OH)
2) or aluminium hydroxide (AL (OH)
3) or the inorganic anti-flaming material of both mixed systems.Be example with the polyolefin cable sheath for example, this type of halogen-free and low-smoke flame-retardant polyolefin is formed as table 1.The adding of high addition inorganic anti-flaming material, it is bigger to cause the machinery, physicals of base-material to descend, and for example elongation at break and intensity descend significantly, the mobile variation of thermoplastic.Though in above-mentioned compound, be added with phase solvent, lubricant and coupling agent, but aforementioned three indexs are still lower, especially influence that two main performance index of anti-rimose---elongation at break and melt-flow index are lower, elongation at break has only 160～240% usually, 150 ℃ of melt-flow indexs (melt flow index) have only 6-9g/10min (table 2), far below the elongation at break that does not add base-material 400-600 before the fire retardant with up to 12 melt-flow index.
The polyolefine melt-flow index is low, when moulding especially extrusion moulding, plastics are released (for example cable insulation, sheath are released by extrusion pressure fully and extruded) by mechanical pressure fully, thereby cause having stored in moulding plastics big hot machine stress, and this is to cause the basic reason of stress cracking in the future.This makes stress and exists, deposit or use in slowly produce stress relaxation, this moment, low elongation self extendability was low, can't eliminate the stress in lax, thereby cause cracking.This defective is objective long-term existence in halogen-free and low-smoke flame-retardant polyolefin, so far effectively solved, become a big obstacle of halogen-free anti-flaming polyolefin, especially for cable insulation and sheath, generally produce cracking in various degree behind the some months, down to causing cable to lose use value and scrapping, become the technical barrier that cable industry needs to be resolved hurrily.Though people propose various halogen-free and low-smoke flame-retardant polyolefin plastic formulas, for example:
The disclosed low smoke halogen-free fire retardant polyolefin cable material of Chinese patent CN1445793 (weight part): ethene-Methane Carboxylic Acid multipolymer 65～75, high density polyethylene(HDPE) 25～35, aluminium hydroxide and/or flame retardant of magnesium hydroxide 90～140, zinc borate and/or ammonium polyphosphate flame retardant 7～10, compatilizer 15～30, oxidation inhibitor A1～2.5, oxidation inhibitor B1～2.5, lubricant 1～1.5, linking agent 4～5.Gained CABLE MATERIALS density 1.4g/cm
3, elongation at break 187-358, oxygen index 33-35.
The disclosed low smoke halogen-free fire retardant polyolefin cable material of Chinese patent CN1796450: ethylene-vinyl acetate copolymer (EVA) 65～75%, high density polyethylene(HDPE) (HDPE) 25～35%, Al (OH)
350～65%, Mg (OH)
250～65%, ethylene vinyl acetate grafted maleic anhydride multipolymer (EVA-g-MAH) 10～20%, ZnB 1.5～10%, antioxidant 1010 1.5%, Zinc Stearate Znste 2%, processing aid 0.1～20%.Gained CABLE MATERIALS density 1.4-1.43g/cm
3, elongation at break 235-360, oxygen index 32-35.
Disclosed used in nuclear power station low-smoke halogen-free combustion-preventing cable insulation of Chinese patent CN1996502 and sheath material, ethylene-vinyl acetate copolymer or silicone resin 70-90 part, polyolefin graft polymers 10-30 part, aluminium hydroxide, magnesium hydroxide, hydrated SiO 2 or silicone resin fire retardant 90-150 part, anti-aging agent 1.3-5 part, irradiation sensitizing agent 2-3 part, soap 1-2 part, organosilicon polymer 1-2 part.Gained material density 1.4g/cm
3, elongation at break 240-250, oxygen index 37-38.
The disclosed thermoplastic low-smoke halide-free fireproof composite polyolefine material of Chinese patent CN101016395: ethylene-vinyl acetate: 10-25%; New LDPE (film grade): 5-15%; Ethylene elastomer: 6-25%; Aluminium hydroxide: 59-77%; Fire retardant: 1-3%; Oxidation inhibitor: 0.2-1%; Lubricant: 0.5-1.5%; Linking agent: 0.1-4%; Tensio-active agent: 0.2-1%.Gained material density＞1.4g/cm
3, elongation at break 160-210, oxygen index 35.
The disclosed halide-free smokeless flame-resistant thermoplatstic polyolefine composition of Chinese patent CN1235175: TPO 35～45, modified thermoplastic polyolefin hydrocarbon 4～18, fire retardant 40～55, synergistic agent 1.5～10, coupling agent 0.4～1.5. process auxiliaries 1～4 and tinting material 0～1.6.Gained material elongation at break 〉=150, oxygen index 〉=33.
The disclosed thermoplastic non-halogen low fume fire resistant cable sheath material of Chinese patent CN1763129,100 parts of polyolefin resins; 70-100 part magnesium hydroxide or aluminium hydroxide; 30-60 part magnesium salt whisker, other auxiliary agent 3-8 part.Gained material elongation at break 200-400, oxygen index 〉=40.
The disclosed low-smoke non-halogen low-poisin fire-retarding polyolefin material for protective sleeve of Chinese patent CN1343737, (85%～89% the ethylene-vinyl acetate copolymer of the base-material by 50%～55%, 8%～10% polyethylene, 1.5%～2% dispersion agent, 0.2%～0.4% organo-peroxide, 1%～3% silicoorganic compound are formed), 12%～1 6% fire-resistant synergistic masterbatch (10%～15% base-material, 7%～8% ethylene-vinyl acetate copolymer, 25%～30% silicon-dioxide, 25%～30% soap, 25%～30% silicon rubber is formed), 28%～33% inorganic combustion inhibitor (97%～99% metal hydroxides and 1%～3% coupling agent are formed), 0.4%～0.6% oxidation inhibitor, 0.8%～1.2% plastics brightening agent and 0.8%～1.2% carbon black are formed.Gained sheath material density is not more than 1.3g/cm
3, elongation at break is more than 300%, and oxygen index is not less than 35, and smoke density is less than 150, and poison exponent is less than 5.0.
The disclosed low-smoke halide-free fireproof composite polyolefine material of Chinese patent CN1472244: 30～70 parts of thermoplastic polyolefin resins, 30～70 parts of macromolecular grafted things, 140～170 parts of divalence or trivalent metal hydroxides, 1～5 part of nanoparticle, 2～15 parts of macromolecule wax.Gained material elongation at break is 260 to the maximum, and the oxygen index electricity is high by 37, molten finger 15.1.
Above-mentioned prior art, each is variant though form proportioning, a common phenomenon is that the inorganic combustion inhibitor consumption substantially all surpasses base-material, therefore elongation at break is generally lower, generally be not more than 400, and all do not provide melt-flow index (not embodying indehiscent characteristic), therefore the problem that objectively ftractures is effectively solved; Secondly the gained density of material is higher, all more than 1.3, causes material use cost height.
Summary of the invention
The object of the invention is to overcome above-mentioned prior art deficiency, and a kind of elongation at break height is provided, and melt fluidity is good, the high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin that the goods splitting resistance is good.
Another purpose of the present invention is to provide the application of a kind of above-mentioned high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin in cable.
The present invention's first purpose realizes, the main improvement is the dispersion agent that adopts tensio-active agent and fatty acid soaps and/or palmitic acid soap and/or oleate soap composition, replace phase solvent, lubricant and three kinds of compositions of coupling agent in the prior art, improve the dispersion effect of inorganic combustion inhibitor in base-material, make and guaranteeing under the flame retardant resistance prerequisite, can reduce the fire retardant consumption significantly, thereby improve the elongation at break and the melt-flow index (processing fluidity) of material, fundamentally reduce cracking and produced reason.Specifically, high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin of the present invention is characterized in that consisting of:
20～70 parts of polyethylene (PE)
30～80 parts of polyethylene vinylacetates (EVA)
Magnesium hydroxide (Mg (OH)
2) 80～110 parts
2～5 parts of dispersion agents
5～15 parts of red phosphorus master batches (RP)
Described dispersion agent is made up of 30-55wt% tensio-active agent and 45-70wt% fatty acid soaps and/or palmitic acid soap and/or oleate soap.
Polyethylene 30-50 part more preferably wherein, polyethylene vinylacetate is 50-70 part more preferably.
Tensio-active agent of the present invention, organic sulfonic acid sodium and/or organic amide are better selected in test for use.
Said fatty acid soaps wherein can be soaps such as potassium stearate, barium, calcium, lead, zinc, or other fatty acid soaps.Among the present invention, above-mentioned soap compounds can singly be used, and also can mix use.
Mg (OH)
2Make fire retardant with the red phosphorus master batch, after processing, red phosphorus is at polyolefine and Mg (OH) at plastics
2Middle intermiscibility is relatively low, thereby can move to surface formation red phosphorus oxygen barrier layer by nature, and Mg (OH)
2Then forming the cooling flame-retardant layer in inside, thereby form double-deck flame retarding construction, is favourable to the flame retardant properties that improves material, and this may also be a reason that causes reducing the fire retardant amount of allocating into.Red phosphorus is separated out to the surface, make the goods cut surface observe and present " bilayer structure ", outer significantly red phosphorus layer, and the common flame-proof material light of product surface, constitute an obvious distinguishing characteristics of halogen-free and low-smoke flame-retardant polyolefin of the present invention, can be used as and differentiate a visual sensory index that is different from other existing halogen-free and low-smoke flame-retardant polyolefins.
High-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin is characterized in that consisting of as cable insulation and/or sheath:
20～70 parts of polyethylene (PE)
30～80 parts of polyethylene vinylacetates (EVA)
Magnesium hydroxide (Mg (OH)
2) 80～110 parts
2～5 parts of dispersion agents
5～15 parts of red phosphorus master batches (RP)
Described dispersion agent is made up of 30-55wt% tensio-active agent and 45-70wt% fatty acid soaps and/or palmitic acid soap and/or oleate soap.
Polyethylene 30-50 part more preferably wherein, polyethylene vinylacetate is 50-70 part more preferably.
Tensio-active agent, organic sulfonic acid sodium and/or organic amide are better selected in test for use.Fatty acid soaps can be soaps such as potassium stearate, barium, calcium, lead, zinc, or other fatty acid soaps.Among the present invention, above-mentioned soap compounds can singly be used, and also can mix use.
High-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin of the present invention, because the dispersion agent that adopts tensio-active agent and fatty acid soaps and/or palmitic acid soap and/or oleate soap to form, substitute original phase solvent, lubricant and coupling agent, test is found fatty acid soaps, palmitic acid soap, oleate soap and base resin (PE, EVA), is reached fire retardant Mg (OH)
2Charge attraction power (may be the important factor that improves intensity and tensile failure performance) is preferably arranged, thereby significantly improved inorganic combustion inhibitor dispersing property and with the bonding properties of base-material, greatly reduce the consumption of inorganic combustion inhibitor, consumption only is original about 1/2, and flame retardant effect also slightly improves, and adopts the ordinary hydrogen magnesium oxide of low price just can reach the good flame effect.The elongation at break of obtained flame-retardant material significantly improves, and maximum can reach 550; Melt-flow index has also improved more than 1 times, and 〉=20, improved the working plasticity of material, reduced the hot machine stress of moulding, basically eliminate inorganic combustion inhibitor to the influence that base-material elongation at break and melt-flow index reduce, efficiently solve the basic reason of cracking, the mechanical property of materials is good.Secondly, the fire retardant add-on reduces, and has also reduced gained polyolefine density, and density is not more than 1.29, reduces at least about 8%, can reduce material usage, has improved its usage economy.And do not adopt the expensive phase solvent of price, lubricant and silane coupling agent, and also having reduced material cost, 10-20% can reduce cost.(performance relatively sees Table 2) halogen-free and low-smoke flame-retardant polyolefin of the present invention, not only can be used for various flame retardant plastics goods, for example make soft tubing, sheet material, material of construction, and the resistance characteristic that it is good, can be used as cable insulation and/or sheath especially uses, efficiently solve halogen-free and low-smoke flame-retardant polyolefin insulation and sheath, exist and easily draw up the difficult problem of the trade leader of splitting.
Halogen-free and low-smoke flame-retardant polyolefin of the present invention, a maximum feature is: cut goods, section obviously has bilayer structure, and skin has tangible red phosphorus layer, and product surface is the flame-proof material light usually, and this is the polyolefinic important difference of gained polyolefine of the present invention and prior art.
Below in conjunction with three specific embodiments; the present invention is understood in exemplary illustration and help; but embodiment only is for the present invention is described; do not represent the present invention to conceive whole technical schemes down; therefore should not be construed as the qualification to technical solution of the present invention, some do not depart from the unsubstantiality of the present invention's design and change In the view of the technician; have the simple change or the replacement of same or similar technique effect, all belong to protection domain of the present invention.
Embodiment
Embodiment 1:PE25 part, EVA75 part, Mg (OH)
290 parts, 2.0 parts of dispersion agents, RP6 part.Adopt banburying process: all material is dropped into Banbury mixer step by step mix plasticizing → list (two) screw rod extruding pelletization → air-cooled → screening → packing.
Dispersion agent: press table 3 example 1,, stir the coccoid that obtains mixing with forming the batch mixes of dispersion agent.
Embodiment 2:PE65 part, EVA35 part, Mg (OH)
2100 parts, 2.5 parts of dispersion agents, RP9 part.Adopt the secondary plasticizing granulation: earlier part EVA and red phosphorus plasticizing are made masterbatch, the Mg (OH) in will filling a prescription again
2, dispersion agent and remaining PE, EVA mix with masterbatch → twin screw extruder plasticizing, pelletizing → air-cooled → screening → packing.
Dispersion agent: press table 3 example 2,, stir the coccoid that obtains mixing with forming the batch mixes of dispersion agent.
Embodiment 3:PE70 part, EVA30 part, Mg (OH)
2110 parts, 3.0 parts of dispersion agents, RP12 part, open plasticizing process: starting material drop into open pair of shafts step by step and mix molding machine plasticizing → following sheet → air-cooled → pelletizing → screening → packing in will filling a prescription.
Dispersion agent: press table 3 example 3,, stir the coccoid that obtains mixing with forming the batch mixes of dispersion agent.
The above-mentioned high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin of gained both can be used as preparation soft tubing, sheet material, material of construction, can be used as cable insulation and/or sheath again and used.
To those skilled in the art; some distortion that can directly derive or associate from this patent disclosure; or the substituting of known technology commonly used in the prior art; and dispersion agent and mixing ratio replacing combination; all has constructed effect (realizing that identical function reaches basic identical effect); all should belong to this patent protection domain, describe in detail no longer one by one.
Table 1 is used halogen-free and low-smoke flame-retardant polyolefin sheathed material always
| Form | Use level (weight part) |
| Polyethylene (PE) polyethylene-vinyl-acetic ester (EVA) aluminium hydroxide and/or magnesium hydroxide phase solvent lubricant (as the silicone powder) coupling agent (as silane) | 10～40 parts 60～90 parts 150～210 parts 5～8 parts 2～4 parts 2～4 parts |
Table 2 halogen-free flameproof material commonly used and halogen-free flameproof material salient features contrast table of the present invention
| Halogen-free flameproof material commonly used | Halogen-free flameproof material of the present invention | |
| Tensile strength N/mm 2 | 9～13 | 10～13 |
| Elongation % during fracture | 160～240 | 400～550 |
| 150 ℃ of g/10min of melt-flow index | 6～9 | 20～25 |
| Oxygen index | 30～43 | 35～42 |
| Density g/cm 3 | 1.45～1.52 | Be not more than 1.29 |
Table 3 embodiment dispersion agent assembly table (wt%)
| Composition | Example 1 | Example 2 | Example 3 |
| Sodium laurylsulfonate | 40 | ||
| Sodium itaconate | 40 | ||
| Diglycollic amide | 35 | 32 | 5 |
| Calcium stearate | 50 | 45 | |
| Zinc Stearate | 25 | 18 | 10 |
Claims (8)
1, high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin is characterized in that consisting of:
20～70 parts of polyethylene (PE)
30～80 parts of polyethylene vinylacetates (EVA)
Magnesium hydroxide (Mg (OH)
2) 80～110 parts
2～5 parts of dispersion agents
5～15 parts of red phosphorus master batches (RP)
Described dispersion agent is made up of 30-55wt% tensio-active agent and 45-70wt% fatty acid soaps and/or palmitic acid soap and/or oleate soap.
2, according to the described high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin of claim 1, it is characterized in that polyethylene is 30-50 part, polyethylene vinylacetate is 50-70 part.
3,, it is characterized in that tensio-active agent is organic sulfonic acid sodium and/or organic amide according to claim 1 or 2 described high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefins.
4,, it is characterized in that fatty acid soaps is potassium stearate, barium, calcium, lead, zinc according to claim 1 or 2 described high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefins.
5, high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin is characterized in that consisting of as cable insulation and/or sheath:
20～70 parts of polyethylene (PE)
30～80 parts of polyethylene vinylacetates (EVA)
Magnesium hydroxide (Mg (OH)
2) 80～110 parts
2～5 parts of dispersion agents
5～15 parts of red phosphorus master batches (RP)
Described dispersion agent is made up of 30-55wt% tensio-active agent and 45-70wt% fatty acid soaps and/or palmitic acid soap and/or oleate soap.
6, according to the described high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin of claim 5 as cable insulation and/or sheath, it is characterized in that polyethylene is 30-50 part, polyethylene vinylacetate is 50-70 part.
7, according to claim 5 or 6 described high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefins as cable insulation and/or sheath, it is characterized in that tensio-active agent is organic sulfonic acid sodium and/or organic amide.
8, according to claim 5 or 6 described high-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefins as cable insulation and/or sheath, it is characterized in that fatty acid soaps is potassium stearate, barium, calcium, lead, zinc.
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| CN102127258A (en) * | 2010-12-30 | 2011-07-20 | 曲阜市东宏实业有限公司 | Phosphorous-series flame-retardant master batch special for polyethylene pipe for coal mine |
| CN102250406A (en) * | 2011-05-05 | 2011-11-23 | 上海邦中新材料有限公司 | Polyethylene material with high flame resistance |
| CN102321294A (en) * | 2011-08-12 | 2012-01-18 | 上海邦中新材料有限公司 | A kind of cable PP Pipe Compound and preparation method thereof with fire retardation |
| CN102585338A (en) * | 2011-01-13 | 2012-07-18 | 苏州汉扬精密电子有限公司 | Anti-wear halogen-free flame-retardant cable material |
| CN102731896A (en) * | 2012-07-16 | 2012-10-17 | 江苏达胜高聚物有限公司 | Highly oil-resistant, low-smoke, halogen-free and radiation cross-linked sheath material and preparation method thereof |
| CN103509232A (en) * | 2013-08-30 | 2014-01-15 | 安徽天民电气科技有限公司 | Black weather-stress-cracking-resistant polyethylene cable sheath material and preparation method thereof |
| CN111635580A (en) * | 2020-05-25 | 2020-09-08 | 上海方之德新材料有限公司 | Anti-adhesion low-smoke halogen-free flame-retardant polyolefin cable material |
| CN111635579A (en) * | 2020-05-25 | 2020-09-08 | 上海方之德新材料有限公司 | High-cracking-resistance low-smoke halogen-free flame-retardant polyolefin cable material |
| CN114644788A (en) * | 2022-03-28 | 2022-06-21 | 金发科技股份有限公司 | Long-term high-temperature aging resistant polyolefin material and preparation method and application thereof |
| CN115477806A (en) * | 2022-10-12 | 2022-12-16 | 盐城市顺泽工贸有限公司 | Low-smoke halogen-free flame-retardant sheath material |
| CN116230298A (en) * | 2023-04-04 | 2023-06-06 | 江苏奥尼特电缆有限公司 | Halogen-free flame-retardant light ship cable and low-smoke halogen-free sheath processing technology thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102127258A (en) * | 2010-12-30 | 2011-07-20 | 曲阜市东宏实业有限公司 | Phosphorous-series flame-retardant master batch special for polyethylene pipe for coal mine |
| CN102585338A (en) * | 2011-01-13 | 2012-07-18 | 苏州汉扬精密电子有限公司 | Anti-wear halogen-free flame-retardant cable material |
| CN102250406A (en) * | 2011-05-05 | 2011-11-23 | 上海邦中新材料有限公司 | Polyethylene material with high flame resistance |
| CN102250406B (en) * | 2011-05-05 | 2013-03-06 | 上海邦中新材料有限公司 | Polyethylene material with high flame resistance |
| CN102321294A (en) * | 2011-08-12 | 2012-01-18 | 上海邦中新材料有限公司 | A kind of cable PP Pipe Compound and preparation method thereof with fire retardation |
| CN102731896A (en) * | 2012-07-16 | 2012-10-17 | 江苏达胜高聚物有限公司 | Highly oil-resistant, low-smoke, halogen-free and radiation cross-linked sheath material and preparation method thereof |
| CN103509232A (en) * | 2013-08-30 | 2014-01-15 | 安徽天民电气科技有限公司 | Black weather-stress-cracking-resistant polyethylene cable sheath material and preparation method thereof |
| CN103509232B (en) * | 2013-08-30 | 2015-09-30 | 安徽天民电气科技有限公司 | A kind of Black weather-stress-crackpolyethylenet polyethylenet cable sheath material and preparation method thereof |
| CN111635580A (en) * | 2020-05-25 | 2020-09-08 | 上海方之德新材料有限公司 | Anti-adhesion low-smoke halogen-free flame-retardant polyolefin cable material |
| CN111635579A (en) * | 2020-05-25 | 2020-09-08 | 上海方之德新材料有限公司 | High-cracking-resistance low-smoke halogen-free flame-retardant polyolefin cable material |
| CN114644788A (en) * | 2022-03-28 | 2022-06-21 | 金发科技股份有限公司 | Long-term high-temperature aging resistant polyolefin material and preparation method and application thereof |
| CN115477806A (en) * | 2022-10-12 | 2022-12-16 | 盐城市顺泽工贸有限公司 | Low-smoke halogen-free flame-retardant sheath material |
| CN116230298A (en) * | 2023-04-04 | 2023-06-06 | 江苏奥尼特电缆有限公司 | Halogen-free flame-retardant light ship cable and low-smoke halogen-free sheath processing technology thereof |
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