An insulated electric wire includes a linear conductor and one or a plurality of insulating layers formed on an outer peripheral surface of the conductor. At least one of the one or plurality of insulating layers contains a plurality of pores, outer shells are disposed on peripheries of the pores, and the outer shells are derived from shells of hollow-forming particles having a core-shell structure. A varnish for forming an insulating layer contains a resin composition forming a matrix and hollow-forming particles having a core-shell structure and dispersed in the resin composition. In the varnish, cores of the hollow-forming particles contain a thermally decomposable resin as a main component, and shells of the hollow-forming particles contain a main component having a higher thermal decomposition temperature than the thermally decomposable resin.

A cable includes: a linear conductor; a plurality of resin hollow tubes which are disposed around the conductor so that an air layer is formed around the conductor and which extend in a longitudinal direction of the conductor; and an insulating protective member configured to protect the conductor and the plurality of hollow tubes.

An assembled wire has a substantially rectangular cross section, and is formed by assembling a plurality of strands. Each strand has a conductor portion and a strand insulating layer covering the conductor portion. At least a part of the assembled plurality of strands in the longitudinal direction is covered with an outer insulating layer. The strand is formed as follows. First, the strand insulating layer is coated on the outer periphery of the conductor portion. At this time, a large number of voids are formed in a resin constituting the strand insulating layer. From this state, the strand is formed, for example, by collapsing the strand insulating layer by heating and pressurizing. At this time, it is possible to uniformly collapse the strand insulating layer by crushing the internal voids. Therefore, the voids in the strand are crushed and flattened in the thickness direction of the strand insulating layer over the entire periphery.

A cable includes: a linear conductor; a plurality of resin hollow tubes which are disposed around the conductor so that an air layer is formed around the conductor and which extend in a longitudinal direction of the conductor; an insulating protective member configured to protect the conductor and the plurality of hollow tube; and a partitioning portion provided in at least one hollow tube among the plurality of hollow tubes, the partitioning portion being configured to partition an interior of the hollow tube.

An insulated wire according to one embodiment of the present invention includes a linear conductor, and one or a plurality of insulating layers that are laminated on an outer peripheral surface of the conductor, wherein at least one layer of the one or plurality of insulating layers includes a plurality of pores, and a closed porosity within the plurality of pores is 80% by volume or higher.

Three-wire communication cables useful for operation with a vehicle are disclosed. The cables can meet MIPI C-PHY standard (Version 1.2) as well as ISO 6722-1 (2011) and 14572 (2011). Methods of making and using the cables are also disclosed.

The present disclosure relates to a telecommunications cable. The telecommunication cable includes a plurality of twisted pairs of insulated wires extending substantially along a longitudinal axis of the telecommunications cable. Each insulated wire of the plurality of twisted pairs of insulated wires includes a conductor and an insulation surrounding the conductor. The insulation includes a first insulation layer defining a plurality of channels disposed around a peripheral surface of the conductor. In addition, the insulation includes a second insulation layer disposed circumferentially around the first insulation layer. Moreover, the insulation includes a third insulation layer disposed circumferentially around the second insulation layer. Furthermore, the telecommunication cable includes a separator and a first layer defining the outer jacket of the telecommunication cable.

An insulated wire according to one embodiment of the present invention includes a linear conductor, and one or a plurality of insulating layers that are laminated on an outer peripheral surface of the conductor, wherein at least one layer of the one or plurality of insulating layers includes a plurality of pores, and a closed porosity within the plurality of pores is 80% by volume or higher.

Provided is an insulated wire that can inhibit a decrease in adhesion between an insulation film including pores and a conductor. The insulated wire comprises a conductor having a long shape, and an insulation film including multiple pores and covering the conductor. The opening area ratio SR measured by a method below is 20% or less. The method of measuring the opening area ratio SR:peeling the insulation film from the conductor; obtaining a SEM image showing an interface on a conductor side in the insulation film peeled; calculating an area S1 of an observation region that is at least a part of the SEM image; and an area S2 of portions where the multiple pores are open in the observation region; and calculating the opening area ratio SR by the following Formula (1).

SR=(S2/S1)?100.Formula (1)

An insulated electric wire includes a linear conductor and one or more of insulating layers formed on an outer peripheral surface of the conductor. In the insulated electric wire, at least one of the one or more of insulating layers has a plurality of pores, outer shells are disposed on peripheries of the pores, and each of the outer shells has a plurality of projections on an outer surface thereof.