The present disclosure provides an electric wire having excellent smoothness, appearance, and storage stability. The electric wire includes a core wire and a coating layer covering the core wire. The coating layer contains a fluorine-free resin and a fluorine-containing crystalline polymer. The fluorine-free resin includes at least one selected from the group consisting of polyamide resins, polyolefin resins, and polyvinyl chloride resin. The fluorine-containing crystalline polymer represents 0.5 to 4.0 mass % relative to the fluorine-free resin.

The present disclosure relates to a method 200 for producing polytetrafluoroethylene (PTFE) thorium oxide membrane. The method 200 comprising combining metal oxide and polytetrafluoroethylene (PTFE) powder to form a first mixture and screening the first mixture to remove aggregates. The method 200 also comprising mixing a lubricant, wetting agent, and optional pigments to form a second mixture and spraying the second mixture over the first mixture. The method 200 also comprising compacting the homogeneous product into a preform and extruding and calendaring the preform to obtain a tape of desired thickness. The method 200 also comprising heating the tape formed to evaporate the lubricant and sintering the tape to fuse polytetrafluoroethylene (PTFE) and encapsulate the thorium oxide particles. The method 200 also comprising cooling the sintered tape at a controlled rate to prevent crack formation and maintain the integrity of the membrane structure.

According to the method of the present invention, poly-4-methyl-1-pentene with a lower molecular weight can be easily and safely produced by mixing poly-4-methyl-1-pentene and another type of polyolefin (I) and conducting melt-stirring at a temperature equal to or higher than the melting points of both the poly-4-methyl-1-pentene and the polyolefin (I).

Embodiments of multilayer articles and methods of producing multilayer articles are disclosed. The multilayer articles include a stack (A-B).sub.n of n layer units A-B, where n is greater than or equal to 64, each layer unit A-B comprising a first nanolayer A and a second nanolayer B overlying the first nanolayer A. The first nanolayer A of the layer units comprises a heterogeneous blend. The second nanolayer B of the layer units comprising a homogeneous material.

The present disclosure provides an electric wire having excellent smoothness, appearance, and storage stability. The electric wire includes a core wire and a coating layer covering the core wire. The coating layer contains a fluorine-free resin and a fluorine-containing crystalline polymer. The fluorine-free resin includes at least one selected from the group consisting of polyamide resins, polyolefin resins, and polyvinyl chloride resin. The fluorine-containing crystalline polymer represents 0.5 to 4.0 mass % relative to the fluorine-free resin.