摘要:
An insulated winding is provided, wherein the insulated winding incudes (a) an electrically conductive core; (b) an electrically insulating non-porous ceramic coating disposed on the conductive core; and (c) a composite silicone coating incuding a plurality of electrically insulating filler particles disposed on the ceramic coating. Further, a method of making an insulated winding is also provided.
摘要:
An insulated winding wire may include a conductor and insulation formed around the conductor. The insulation may include a base insulation layer formed around the conductor and having a first dielectric constant (ε1). The insulation may further include an extruded thermoplastic layer formed around the base insulation layer and having a second dielectric constant (ε2). The extruded thermoplastic layer may include (i) at least one polymer comprising a ketone group and (ii) at least one fluoropolymer, A ratio of the dielectric constant (ε2) of the extruded thermoplastic layer to the dielectric constant (ε1) of the base layer at 250 °C may he less than or equal to approximately 1,0.
摘要:
This invention relates to silane moisture curable polymer composition and more particularly, to such a polymer composition that is highly diluted by a non-silane containing component, while retaining good high temperatures properties. The invention is a polymer composition comprising a base resin comprising less than 59wt% of a silane crosslinkable polyethylene(A), an thermoplastic polyolefin free from silane groups (B) wherein the polymer composition comprise a filler with a BET Nitrogen Surface Area larger than 3 m²/g (C). The invention also relates to a cable layer of such polymer composition suitably a semiconducting layer of a power cable.
摘要:
Coatings, especially dual-layer composite coatings, for elongated electrically conductive wire can have a dissipation factor that is less than 1%, when tested at 1 KHz at room temperature and 50% relative humidity. The composite thermoplastic coating can include two distinct layers, one layer preferably being a thermoplastic polyetherimide (PEI) and another layer preferably being a thermoplastic perfluoroalkoxy (PFA). The ratio of the thickness of PEI/PFA can range from more than zero to less than 5.4. The thickness of the composite plastic coating can range from more than zero to less than 200 micrometers. Methods for forming the coatings and coated wires are also described.
摘要:
A composite insulation that comprises an insulating material and amorphous micro oxide particles added to the insulating material by at least 1 % weight of the composition insulation wherein the micro oxide particles provide at least one of an increase in the flame retardancy of the insulating material, a reduction in smoke generated, and an improvement in the electrical properties of the insulating material.
摘要:
Thermal mass compensated foam support structures for coaxial cables such as inner conductors and or inner conductor support structures. The foam support structures provided with an adhesive solid or high density foam polymer or blend layer to increase the thermal mass of the support structure enough to allow the foam to surround the adhesive solid or high density foam polymer or blend layer without forming unacceptably large voids in the foam dielectric as the foam dielectric cures.