摘要:
A cable, in particular for power transmission, for telecommunications or for data transmission, or also combined power/telecommunications cables, wherein at least one coating layer is comprised of a recyclable material which is halogen-free and has superior mechanical and electrical properties. This material comprises a polymer mixture of a crystalline propylene homopolymer or copolymer and an elastomeric copolymer of ethylene with at least one alpha-olefin having from 3 to 12 carbon atoms, and optionally containing a diene. The copolymer is characterized by a 200% tension set value of lower than 30% (measured at 20° C. for 1 minute according to ASTM standard D 412). The cable also includes a flame-retardant polymer composition.
摘要:
The process of the invention to make miniaturized multipolar cables includes the steps of combining together a plurality of individually insulated conductors, inserting a filling in a pasty state and containing mineral fillers into the gaps existing between the conductors, partly hardening the filling and disposing the other cable components, in particular the sheath, around the conductors-filling assembly, and letting the filling become completely hard within the produced cable.
摘要:
A cable, self-extinguishing and releasing low quantities of toxic and corrosive smokes and gases, for optical or electrical applications, comprises a coating (3) including an outer layer (5) consisting of a polymeric mixture including 50 to 80 parts (w/w) of an aromatic polyester of the isophthalic and terephthalic acids, with bisphenol A and 20 to 50 parts (w/w) of a polyether-polyester block elastomer copolymer having a Shore hardness D greater than 50 and a Vicat softening point higher than 170.degree. C., as well as a coaxial inner (4) layer comprising an polyester thermoplastic elastomer including a quantity of aromatic groups such that its Shore hardness D is equal to at least 45 and such that the delamination shear force necessary to separate said layers (4, 5) from one another is equal to at least 2,000 g. after ageing in oil ASTM Nr. 3 for 2 hours at 100.degree. C.
摘要:
In a cable in accordance with the invention, capable of working at operating temperatures of 150.degree. C., a conductor coating made of a mixture of a polyphenylsulfide and a silicone ether imide block copolymer is provided. The invention also refers to the mixture in itself and to a method of producing said cable.
摘要:
A utility pole includes a thermoplastic composite material including: (a) at least one olefin polymer; and (b) at least one reinforcing fiber material embedded in the at least one olefin polymer, the thermoplastic composite material having a specific tensile strength higher than or equal to 15 MPa/(gr/cm3), preferably 20 MPa/(gr/cm3) to 200 MPa/(gr/cm3), and more preferably 30 MPa/(gr/cm3) to 150 MPa/(gr/cm3) and a specific tensile modulus higher than or equal to 2000 MPa/(gr/cm3), preferably 2500 MPa/(gr/cm3) to 20000 MPa/(gr/cm3), and more preferably 3000 MPa/(gr/cm3) to 15000 MPa/(gr/cm3).
摘要翻译:电极杆包括热塑性复合材料,其包括:(a)至少一种烯烃聚合物; 和(b)至少一种包含在所述至少一种烯烃聚合物中的增强纤维材料,所述热塑性复合材料具有高于或等于15MPa /(gr / cm 3)的比抗拉强度,优选20MPa /(gr / cm 3) )至200MPa /(gr / cm 3),更优选为30MPa /(gr / cm 3)〜150MPa /(gr / cm 3),高于或等于2000MPa /(gr / cm 3) 优选为2500MPa /(gr / cm 3)〜20000MPa /(gr / cm 3),更优选为3000MPa /(gr / cm 3)〜15000MPa /(gr / cm 3)。
摘要:
A process for producing a composite material includes the following steps: (a) melting at least one polyester having an inherent viscosity higher than or equal to 0.5 dl/g, preferably 0.6 dl/g to 1.2 dg/l; (b) cooling said polyester so as to obtain a polyester having a crystallinity lower than 30%, preferably 1% to 20%; and (c) mixing at least one layered clay material with the polyester obtained in step (b) so as to obtain the composite material. The composite material is particularly useful for manufacturing food or beverage containers, in particular bottles.
摘要:
Telecommunication cable having a tubular element, in particular a buffer tube housing at least one transmission element. The tubular element has a polymeric composition which allows an easy tearing of the element, in order to get access to the transmission element housed therein. The tubular element is made from a polymeric composition having a heterophasic olefin copolymer which has at least one amorphous phase having sequences deriving from copolymerization of at least two different olefin monomers, at least a first crystalline phase having sequences deriving from the homopolymerization of a first olefin monomer and at least a second crystalline phase having sequences deriving from the homopolymerization of a second olefin monomer.
摘要:
Cable, in particular for medium-voltage or high-voltage electrical power transmission or distribution, for telecommunications or for data transmission, comprising a conductor and at least one coating layer based on a non-crosslinked polymer material comprising a thermoplastic reactor elastomer with an ethylene-based elastomeric phase co-polymerized with an &agr;-olefin and a propylene-based thermoplastic phase, in which the said elastomeric phase in the said thermoplastic reactor elastomer is at least 45% by weight relative to the total weight of the thermoplastic reactor elastomer, and the said thermoplastic reactor elastomer has value of enthalpy of fusion of peaks present below 130° C. and attributable to polyethylene sequences, such as HIFAX® KS080.
摘要:
A cable, in particular for power transmission, for telecommunications or for data transmission, or also combined power/telecommunications cables, wherein at least one coating layer consists of a recyclable material which is halogen-free and has superior mechanical, electrical, and flame-retardant properties. This material consists of a polymer mixture comprising: (a) a crystalline propylene homopolymer or copolymer; and (b) a copolymer of ethylene with at least one alpha-olefin having from 4 to 12 carbon atoms, and optionally with a diene; the said copolymer (b) being characterized by a density of between 0.90 and 0.86 g/cm3 and by a Composition Distribution Index, defined as the weight percentage of copolymer molecules having an alpha-olefin content within 50% of the average total molar content of alpha-olefin, of greater than 45%. This material may also include a flame-retardant inorganic filler.
摘要翻译:一种电缆,特别是用于电力传输的电缆,用于电信或数据传输,或者还包括组合的电力/电信电缆,其中至少一个涂层由无卤素的可回收材料组成并且具有优异的机械,电和阻燃材料, 阻燃性能。 该材料由聚合物混合物组成,包括:(a)结晶丙烯均聚物或共聚物; 和(b)乙烯与至少一种具有4至12个碳原子的α-烯烃和任选与二烯的共聚物; 所述共聚物(b)的特征在于密度为0.90至0.86g / cm 3,并且通过组成分布指数,其定义为α-烯烃含量在平均总摩尔含量的50%以内的共聚物分子的重量百分比 α-烯烃,大于45%。 该材料还可以包括阻燃性无机填料。
摘要:
A cable, in particular for power transmission, for telecommunications or for data transmission, or also combined power/telecommunications cables, wherein at least one coating layer consists of a recyclable material which is halogen-free and has superior mechanical and electrical properties. This material consists of a polymer mixture comprising: (a) a crystalline propylene homopolymer or copolymer; and (b) a copolymer of ethylene with at least one alpha-olefin having from 4 to 12 carbon atoms, and optionally with a diene; the said copolymer (b) being characterized by a density of between 0.90 and 0.86 g/cm3 and by a Composition Distribution Index, defined as the weight percentage of copolymer molecules having an alpha-olefin content within 50% of the average total molar content of alpha-olefin, of greater than 45%.
摘要翻译:电缆,特别是用于电力传输,用于电信或数据传输的电缆,或者还包括组合的电力/电信电缆,其中至少一个涂层由可再循环材料组成,其是无卤素且具有优异的机械和电气性能。 该材料由聚合物混合物组成,包括:(a)结晶丙烯均聚物或共聚物; 和(b)乙烯与至少一种具有4至12个碳原子的α-烯烃和任选与二烯的共聚物; 所述共聚物(b)的特征在于密度为0.90至0.86g / cm 3,并且通过组成分布指数,其定义为α-烯烃含量在平均总摩尔含量的50%以内的共聚物分子的重量百分比 α-烯烃,大于45%。