CN102585479B - Wear-resistant halogen-free flame-retardant elastomer complex and preparation method thereof - Google Patents
Wear-resistant halogen-free flame-retardant elastomer complex and preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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Abstract
The invention provides a wear-resistant halogen-free flame-retardant elastomer complex and a preparation method thereof. The wear-resistant halogen-free flame-retardant elastomer complex comprises the components with the weight percentages as follows: 3 to 35 percent of thermoplastic polyether type polyurethane elastomer, 15 to 35 percent of polyphenylene oxide resin, 15 to 35 percent of compatibilizers, 15 to 25 percent of flame retardants, 5 to 15 percent of plasticizers and 0.5 to 1.5 percent of antioxidants. The preparation method of the wear-resistant halogen-free flame-retardant elastomer complex comprises the steps that the polyurethane elastomer resin, the polyphenylene oxide resin, the compatibilizers, the flame retardants, the plasticizers and the antioxidants are dispersed and mixed by a high speed mixer, and then melted, mixed-milled, extruded, cooled, dried, granulated and packaged by a twin screw extruder. The wear-resistant halogen-free flame-retardant elastomer complex has the characteristics of high halogen-free flame-retardant grade (a UL-94 V-0 grade), good mechanical performance, excellent electrical performance, good wear-resistant performance and good ageing-resistant performance, is easy to extrude, form and process, and is very suitable to be used on power lines, data transmission lines and the like of high-end consumed electrical apparatus.
Description
Technical field
The present invention relates to polymeric material field, be specifically related to a kind of Wear-resistant halogen-free flame-retardant elastomer complex and its preparation method and application.
Background technology
The halide-containings such as polyvinyl chloride (PVC), chloroprene rubber have good flame retardant properties and are widely used in electric wire industry, but can produce a large amount of toxic gases when fire or burning disposal, human body is produced to harm greatly to environment, recently, for substituting the demand of the halogen-free flame retarding elastomer of PVC electric wire and cable material, be explosive growth.
The matrix material that has occurred at present much aiming at halogen-free flame-retardant wire and developed, take the systems such as polyolefine/inorganic combustion inhibitor, polyolefine or elastomerics/expansion type flame retardant, Noryl/phosphorus-nitrogen containing flame retardant, urethane/phosphorus-nitrogen containing flame retardant as main.
Polyolefine/inorganic combustion inhibitor system just can reach good flame retardant effect in the situation that fire retardant addition is very large, has damaged greatly the mechanical property of material; Although polyolefine or elastomerics/expansion type flame retardant can keep good mechanical property reaching under the condition of flame retardant properties, but material easily water suction to cause that goods produce that electrical property declines, separate out on surface etc. bad, under wet environment, reactance voltage performance can not be tested by relevant safety such as UL.
Polyurethane Thermoplastic Elastomer (TPU) is a kind of characteristic with rubber and without the crosslinked thermoplastic material can reprocessabilty using, have fabulous wear resistance, low temperature flexibility, oil-proofness and high tensile strength.But it is existent defect also, polyurethane elastomer processing temperature window narrows first, processing fluidity is extremely responsive to temperature, extrusion moulding process control difficulty; Secondly, often need to add the soft durometer of softening agent adjustment material, but the consistency of polyurethane elastomer and softening agent is poor for the polymer composites of electric wire, after interpolation softening agent, easily appearance is plasticizer extraction, causes product surface to be clamminess; The 3rd, the specific inductivity of polyurethane elastomer is greater than 6, and the situation withstand voltage properties that during as insulating material, particularly thickness of insulating layer is little does not reach safety standard-required.
Noryl/phosphorus-nitrogen containing flame retardant system has the performance of relative equilibrium, as better in its thermotolerance and flame retardant resistance, physical strength etc., but its wear resisting property is general.Patent document 1 (Patent Office of the People's Republic of China's publication: CN101130616A) disclose a kind of low-smoke zero-halogen flame-retardant polyphenyl ether wire cable material and preparation method thereof, it forms presses mass fraction for (part): polyphenylene oxide 40-80; High-impact polystyrene 20-60; Elastomerics 10-70; Functionalized polyphenylene ether 1-20; Fire retardant 10-60; Smoke suppressor 5-20; Oxidation inhibitor 1-3; Environmental protection Masterbatch 3-5.The material of patent document 1 invention has higher hardness, and wear resisting property is general, is not suitable for the outer quilt of electric wire that preparation is had relatively high expectations to flexibility and wear resistance.Patent document 2 (Patent Office of the People's Republic of China's publication: CN101358028A) adjust on the basis of patent document 1, reduced the hardness of invention material, but from embodiment, find out, the tensile break strength of material is all lower than 10MPa, and its wear resisting property is general.
With respect to PVC material, halogen-free flame retarding elastomer material expensive, so people wish to prepare the more product of thin-walled with halogen-free flame retarding elastomer material, with this, reduce costs.This just requires material itself to have very good mechanical properties, electrical property, wear resisting property and ageing-resistant performance, and existing technology can not meet this requirement well.
Summary of the invention
The object of this invention is to provide a kind of Wear-resistant halogen-free flame-retardant elastomer complex with very good mechanical properties, electrical property, wear resisting property and ageing-resistant performance.
Another object of the present invention is to provide a kind of preparation method of above-mentioned Wear-resistant halogen-free flame-retardant elastomer complex.
Another object of the present invention is to provide the application of above-mentioned Wear-resistant halogen-free flame-retardant elastomer complex in preparing electric wire.
Above-mentioned purpose of the present invention is achieved by following technical solution:
A Wear-resistant halogen-free flame-retardant elastomer complex, the component of being calculated by following percentage ratio by weight forms: polyurethane elastomer 3～35%, polyphenylene oxide resin 15～35%, compatilizer 15～35%, fire retardant 15～25%, softening agent 5～15%, oxidation inhibitor 0.5～1.5%.
Described polyurethane elastomer is thermoplastic polyether urethane elastomerics.
Polyurethane elastomer can be divided into polyether-type, polyester type conventionally, the high strength of polyether-type, hydrolysis and high resilience, and low-temperature performance is good; From the viewpoint of hydrolysis and ageing-resistant, the present invention selects polyether(poly)urethane elastomerics.
Pure polyurethane elastomer wear resisting property is outstanding, as according to ISO5470-1 standard testing (23 ℃, abrasion condition: CS17 wheel, 1000g/ wheel, 5000r/m), the anti-Taibo wear loss of polyether(poly)urethane is 0.5～65mg, and natural rubber is 146mg, impact-resistant PVC is 160mg, and the material wear loss that patent document 2 is invented surpasses 300mg.Conventionally, for polyether(poly)urethane elastomerics, hardness is got over high-wear resistance and is declined, and the wear loss of the Elastollan 1175 that the shore hardness of producing as BASF is 75A is 20mg, and the wear loss of the Elastollan 1195A that shore hardness is 95A is 55mg; The ISOTHANE 5075A wear loss that the shore hardness that and for example Great Eastern Resins Industrial company produces is 75A is 5mg, and the wear loss of the ISOTHANE 5090A that shore hardness is 90A is 50mg.From wear resisting property and intensity, consider, the preferred polyether(poly)urethane elastomerics of the present invention durometer level is shore hardness 65A to 95A.
Polyurethane elastomer belongs to half hitch crystal formation, and temperature reaches after fusing point, and mobility sharply increases, if while using as unique matrix resin, can cause difficulty to extrusion moulding processing; Because the independent system mobility of using polyphenylene oxide to make matrix resin is relatively poor, therefore in the present invention, add polyurethane elastomer and polyphenylene oxide resin blend that fluidity of molten is good, can adjust the processing characteristics of improving mixture.
Described polyphenylene oxide resin comprises all known polyphenylene oxide resins.Described polyphenylene oxide resin is the limiting viscosity measured in the 25 ℃ of chloroforms resin between 0.30～0.60dl/g.Can use a kind of polyphenylene oxide resin of independent limiting viscosity, also can select several different qualities viscosity polyphenylene oxide resin mixtures.The outward appearance of polyphenylene oxide can be Powdered can be also particulate state.
Polyphenylene oxide resin intensity is high, good heat resistance, and electrical property is excellent, and resin itself has certain flame retardant properties.In the present invention, polyphenylene oxide component can improve the mechanical property of mixture, electrical property, and in whole complex systems, play the effect of char-forming agent and improve the flame retardant properties of mixture, from the viewpoint of elastomeric compound flame retardant properties, polyphenylene oxide content can not be lower than 15 % by weight, and from the viewpoint of the elongation at break of elastomeric compound, polyphenylene oxide content can not be higher than 35%.
Described halogen-free flame-retardant elastomer complex, is characterized in that described compatilizer is any one or more than one the mixture in styrene-ethylene/butylene-styrene block copolymer grafted maleic anhydride, grafted low density polyethylene maleic anhydride, high-density polycthylene grafted maleic anhydride, LLDPE grafted maleic anhydride, ethylene-octene copolymer grafted maleic anhydride.
Because elastic polyurethane and polyphenylene oxide are not complete compatible systems, add the compatilizer of grafted maleic anhydride can put forward the consistency of mixture, avoid occurring the bad phenomenon such as layering in mixture moulding process.
As a kind of most preferably scheme, described compatilizer most preferably is styrene-ethylene/butylene-styrene block copolymer grafted maleic anhydride.
Described fire retardant is the mixture of organic hypophosphite and melamine cyanurate, more than 20 % by weight that wherein organic hypophosphite is flame-retardant mixture.Melamine cyanurate is added on and in elastomeric compound of the present invention, had both played fire-retardant effect, play again the effect of lubricant, but while adding melamine cyanurate separately, need to add and more than 30% just can reach the fire-retardant rank of UL94V-0, the too high rear elastomeric compound elongation at break of addition can reduce, and can not meet the testing standard requirement of electric wire.Through experiment, find, after melamine cyanurate and organic hypophosphite are composite, the compound flame retardant that adds 15-25% weight fraction can reach fire-retardant requirement, more than wherein organic hypophosphite accounts for 20 % by weight of flame-retardant mixture.The carbon-forming performance of organic hypophosphite is better, addition is less can reach good flame retardant effect, the ExolitOP1230 that the business-like trade mark of organic hypophosphite is produced as Clariant company, Exolit OP1240 etc., there is flame retarding efficiency high, the features such as great thermotolerance.If single from the viewpoint of flame retardant properties, organic hypophosphite and melamine polyphosphate (MPP), phosphoric acid ester fire retardant is composite also can obtain good flame retardant effect, but its wear resisting property of elastomeric compound of organic hypophosphite and MPP compositional flame-retardant is composite poor compared with melamine cyanurate and organic hypophosphite; Phosphoric acid ester is generally liquid or the very low powder of fusing point at normal temperatures, and after adding phosphoric acid ester fire-retardant, elastomeric compound easily produces separates out and the problem such as migration.
Described fire-retardant polyphenyl ether compound, it is characterized in that described softening agent is a kind of of naphthenic oil, white mineral oil or both mixtures, softening agent add the dispersiveness that can effectively improve each component, reduce plastic melt and the bonding strength of metallic surface and the internal friction of plastic melt, be conducive to improve the melt flow rate (MFR) of mixture, regulate the functions such as pliability of mixture.
Described oxidation inhibitor is the mixture in free radical scavenger, metal passivator kind antioxidant, and described free radical scavenger agent is 1,3,5-tri-(the 4-tertiary butyl-3-hydroxyl-2,6-dimethyl benzyl)-1,3,5-triazines-2,4,6-(1H, 3H, 5H)-triketone; Described metal passivator kind antioxidant is preferably N, N-diacetyl adipyl two hydrazides, N-salicylidene-N-salicyl hydrazides or salicil hydrazine.Different from general polymeric blends, elastomeric compound of the present invention is for wire cable insulating and coating preparation, need to test aging resistance, through research, find, affecting two factors of elastomeric compound aging resistance of the present invention is that free yl induction decomposes and metal ion catalysis decomposes, because material in use with metallic contact, and the starting material polyphenylene oxide using is used the catalyzer that contains cupric ion in building-up process, material still has minimal residue after purifying, therefore in mixture, add metal passivator to seem particularly important, residual metal ion reduces activity when adding metal passivator and can make elastomerics and metallic contact or in elastomeric compound, reduce the catalysis solarization of metal ion elastomeric compound.From the viewpoint of cost and performance two, need and only need to add each 0.2 weight of free radical scavenger and metal passivator and can reach test request above, both add total amount should not surpass 1.5 % by weight, otherwise easily produce oxidation inhibitor, migrates to elastomeric compound surface appearance " telling white powder " phenomenon.
The preparation method of Wear-resistant halogen-free flame-retardant elastomer complex of the present invention, the steps include: first polyurethane elastomer resin, polyphenylene oxide resin, compatilizer, fire retardant, softening agent and oxidation inhibitor after high-speed mixer dispersing and mixing, by twin screw extruder melting, mix, extrude, cooling, dry, pelletizing and packing.Each district's temperature of screw rod should remain between 200～260 ℃, and the length-to-diameter ratio of twin screw extruder is 36～48, and screw speed is 260～500 revs/min.
The application of described Wear-resistant halogen-free flame-retardant elastomer complex in halogen-free flame-retardant wire.
Compared with prior art, the present invention has following beneficial effect: Wear-resistant halogen-free flame-retardant elastomer complex of the present invention, merged the advantage of polyether-type Polyurethane Thermoplastic Elastomer and polyphenylene oxide, select and there is the flame-retardant mixture that flame retarding efficiency is high and have lubricant effect, there is halogen-free flameproof grade high (UL-94V-0 grade), good mechanical property, electrical property is excellent, wear resisting property is good, ageing-resistant performance is good, easily carry out the feature of extrusion moulding processing, be suitable for very much supply lead, data transmission line of high-end consumer electronics electrical equipment etc.
Embodiment
Below in conjunction with embodiment, further explain the present invention, but embodiment does not limit in any form to the present invention.
The preparation method of halogen-free flame-retardant elastomer complex of the present invention, the steps include: first polyurethane elastomer resin, polyphenylene oxide resin, compatilizer, fire retardant, softening agent and oxidation inhibitor after high-speed mixer dispersing and mixing, by twin screw extruder melting, mix, extrude, cooling, dry, pelletizing and packing.Each district's temperature of screw rod should remain on 245 ℃, and the length-to-diameter ratio of twin screw extruder is 40, and screw speed is 350 revs/min.
According to above-mentioned preparation method, embodiment and comparative example adopt raw material as follows:
Each test is undertaken by following standard:
Tensile strength: injection moulding 4.0mm Elongation test batten, according to GB1040-2006, test;
Elongation at break: injection moulding 4.0mm Elongation test batten, according to GB1040-2006, test;
Combustionproperty: according to UL94, adopt the sample of 4.0mm to test;
Wear resisting property: according to ISO5470-1 standard testing, abrasion condition is CS17 wheel, 1000g/ wheel, 5000r/m, 23 ℃;
Dielectric strength: test according to GB1409;
Tensile strength burn-in test: injection moulding 4.0mm Elongation test batten, in the ventilation baking oven of 136 ℃, after aging 168 hours, according to GB1040-2006, test aging back draft residual rate intensity=aging rear test value/aging rear test value * 100%;
Elongation at break burn-in test: injection moulding 4.0mm Elongation test batten, in the ventilation baking oven of 136 ℃ after aging 168 hours, according to GB1040-2006, test aging rear elongation at break residual rate=aging rear test value/aging rear test value * 100%;
Shore hardness: injection moulding thickness is 6.0mm, the circular testing plate that diameter is 25mm, tests according to ASTM D2240 shore hardness A type testing method.
The formula table of table 1 embodiment and the performance test results of mixture
105 ℃ of grade electric wires of UL1581 standard require to be greater than 8.27MPa for the aging front tensile strength of mechanical property requirements of the thermoplastic elastic material (TPE) of electric wire, elongation at break is greater than 200%, 136 ℃ of both residual rates after aging 168 hours are greater than respectively 75% (U15581, version in 2008, the 81st page).From the data of table 1, can see, each embodiment all can reach requirement.And can find out the increase along with TPU content, the wear loss of elastomeric compound reduces gradually, wear resisting property does not have clear improvement when adding TPU.Comparative example 2 is because polyphenylene oxide addition is low, and flame retardant properties can only reach V-1 rank.
The formula table of table 2 embodiment and the performance test results of mixture
Embodiment in table 2 has adopted the polyether(poly)urethane elastomerics of different hardness, the same with raw-material wear resisting property, elastomeric compound reduces gradually along with the TPU hardness of selecting improves its wear resisting property, yet, although the TPU wear resisting property of soft is better, intensity is relative with aging resistance on the low side; That comparative example 3 adopts is polyester type TPU, better performances before aging, due to aging be to carry out in ventilation baking oven, oven environment has certain moisture, polyester type TPU anti-hydrolytic performance, not as polyether-type TPU, therefore can see that the aging resistance of the elastomeric compound of selecting polyester type TPU is poor.To sum up consider the polyether(poly)urethane elastomerics of the preferred shore hardness of the present invention 65A to 95A.
The formula table of table 3 embodiment and the performance test results of mixture
In table 3, embodiment has compared the PPE of different qualities viscosity number and the situation of dissimilar compatilizer.Select the PPE mechanical property of three kinds of viscosity numbers all can reach UL1581 standard-required, while selecting the PPE of low viscosity number, tensile strength and aging resistance are relatively low, and this is because the relatively low cause of PPE molecular weight of low viscosity number; Three kinds of different compatilizer contrasts, while selecting LDPE and HDPE class compatilizer, wear resisting property is better, and this is the good cause of wear resisting property due to LDPE and HDPE itself, but its mechanical property is relative with aging resistance on the low side.
The formula table of table 4 embodiment and the performance test results of mixture
In table 4, embodiment has contrasted the situation of adding different ratios compatilizer, from comparative example 4, comparative example 5, find out, do not add compatilizer or compatilizer when less, the mechanics of elastomeric compound, wear resisting property and aging resistance are all poor, this is because of TPU and the poor cause of PPE consistency, need to be by compatilizer increase-volume; And compatilizer adding proportion is when high, flame retardant properties can only reach V-1 rank.
The formula table of table 5 embodiment and the performance test results of mixture
Embodiment in table 5 can see, when compositional flame-retardant agent content is lower, elastomeric compound flame retardant properties is poor; While using a kind of fire retardant separately, flame retardant properties is also poor, and synergistic effect is played in two kinds of fire-retardant composite uses mutually.
The formula table of table 6 embodiment and the performance test results of mixture
The embodiment of table 6 has contrasted the situation of plasticizer loading and antioxidant content variation.Can see, while not adding softening agent, the hardness of gained elastomeric compound is high, and this can affect the flexibility feel of product when elastomerics is actual to be used; Because softening agent is low molecular weight substance, intensity and the aging resistance of the too high rear elastomeric compound of plasticizer loading are poor.While not adding oxidation inhibitor, show the poor effect of aging resistance.
The guidance providing in above description is provided, and those of ordinary skills can expect many many improvement of the present invention and embodiment.Therefore, the present invention is not limited to disclosed specific implementations, and within improvement and other embodiments also should be included in claims, and disclosed specific implementations is not for limiting object.
Claims (8)
1. a halogen-free flame-retardant elastomer complex, is characterized in that the component of being calculated by following percentage ratio by weight forms: polyurethane elastomer 3～35%, polyphenylene oxide resin 15～35%, compatilizer 15 ~ 35%, fire retardant 15～25%, softening agent 5～15%, oxidation inhibitor 0.5～1.5%; Described polyurethane elastomer is thermoplastic polyether urethane elastomerics;
The elastomeric durometer level of described thermoplastic polyether urethane is shore hardness 65A ~ 95A;
Described fire retardant is the mixture of organic hypophosphite and melamine cyanurate, more than 20 % by weight that wherein organic hypophosphite is flame-retardant mixture.
2. halogen-free flame-retardant elastomer complex according to claim 1, is characterized in that described polyphenylene oxide resin is the limiting viscosity measured in the 25 ℃ of chloroforms polyphenylene oxide resin between 0.3～0.6dl/g.
3. halogen-free flame-retardant elastomer complex according to claim 1, is characterized in that described compatilizer is any one or more than one the mixture in styrene-ethylene/butylene-styrene block copolymer grafted maleic anhydride, grafted low density polyethylene maleic anhydride, high-density polycthylene grafted maleic anhydride, LLDPE grafted maleic anhydride, ethylene-octene copolymer grafted maleic anhydride.
4. halogen-free flame-retardant elastomer complex according to claim 1, is characterized in that described softening agent is a kind of of naphthenic oil, white mineral oil or both mixtures.
5. halogen-free flame-retardant elastomer complex according to claim 1, it is characterized in that described oxidation inhibitor is the mixture of free radical scavenger, metal passivator kind antioxidant, more than wherein free radical scavenger, metal passivation agent content are respectively elastomeric compound gross weight 0.2 % by weight.
6. the preparation method of halogen-free flame-retardant elastomer complex described in a claim 1, it is characterized in that comprising the steps: by polyurethane elastomer resin, polyphenylene oxide resin, compatilizer, fire retardant, softening agent and oxidation inhibitor after high-speed mixer dispersing and mixing, by twin screw extruder melting, mix, extrude, cooling, dry, pelletizing and packing.
7. preparation method according to claim 6, is characterized in that each district's temperature of screw rod of described twin screw extruder should remain between 200～280 ℃, and the length-to-diameter ratio of twin screw extruder is 36～48, and screw speed is 260～500 revs/min.
8. the application of halogen-free flame-retardant elastomer complex in halogen-free flame-retardant wire described in claim 1.
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| CN102888090A (en) * | 2012-08-31 | 2013-01-23 | 苏州博云塑业有限公司 | Halogen-free flam-retardant thermoplastic polyurethane (TPU) material |
| US8703848B1 (en) * | 2012-10-09 | 2014-04-22 | Sabic Innovative Plastics | Blends of micronized polyphenylene ether and thermoplastic polyurethanes blend |
| US9447227B2 (en) * | 2013-10-03 | 2016-09-20 | Sabic Global Technologies B.V. | Flexible polyurethane foam and associated method and article |
| CN103554892A (en) * | 2013-10-31 | 2014-02-05 | 合肥得润电子器件有限公司 | Ageing-resistant and flame-retardant insulating material for wire harnesses of household appliance |
| CN104725833A (en) * | 2015-03-23 | 2015-06-24 | 深圳市沃尔核材股份有限公司 | Yellowing-resistant halogen-free flame retardant thermoplastic polyurethane elastomer cable rubber material and preparation method thereof |
| CN104810105A (en) * | 2015-04-14 | 2015-07-29 | 中山弘博企业管理咨询有限公司 | Power cable for power supply of railway tunnel |
| CN105563683B (en) * | 2016-01-29 | 2018-03-20 | 桐乡市中辰化纤有限公司 | The method and its special equipment of master batch are produced in a kind of directly mixing of PET melt |
| CN105968778A (en) * | 2016-05-30 | 2016-09-28 | 繁昌县菲德通讯材料设计有限公司 | Insulating material for high-power cable for coal mine |
| CN107481789A (en) * | 2017-09-20 | 2017-12-15 | 泰州日顺电器发展有限公司 | A kind of high fire-retardance is anti-to hydrolyze extraordinary spiral wires and its manufacture method |
| CN109777086A (en) * | 2019-01-18 | 2019-05-21 | 中广核高新核材科技（苏州）有限公司 | A kind of halogen-free flameproof polyether polyurethane elastomer of high-temp resisting high-humidity resisting and preparation method thereof |
| CN109880343A (en) * | 2019-01-28 | 2019-06-14 | 广东国立科技股份有限公司 | A kind of corrosion-resistant weather-resistance flame-retardant PPO elastic composite and preparation method thereof |
| CN112876638A (en) * | 2021-01-08 | 2021-06-01 | 东莞市中森新材料有限公司 | Formula and production process of non-adhesive polyurethane elastomer |
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Address after: 510520 Guangdong city of Guangzhou province high tech Industrial Development Zone No. 33 Ke Feng Lu Patentee after: Kingfa Technology Co., Ltd. Patentee after: Shanghai Kingfa Science and Technology Development Co., Ltd. Patentee after: SICHUAN KINGFA TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 510520 Guangdong city of Guangzhou province high tech Industrial Development Zone No. 33 Ke Feng Lu Patentee before: Kingfa Technology Co., Ltd. Patentee before: Shanghai Kingfa Science and Technology Development Co., Ltd. Patentee before: Mianyang Changxin New Material Development Co., Ltd. |