A bracket assembly suitable for use with an electronic device is described. The bracket assembly may include a bracket body having a channel. The bracket assembly may further include a membrane embedded in the bracket body and designed to allow air, but not liquid (such as water), to pass through the membrane. The membrane may be at least partially surrounded by a membrane support molded to the membrane. The membrane and the membrane support may be disposed in a molding tool to receive a material used to mold the bracket body over the membrane and the membrane support. During the molding operation, the membrane support may act as a buffer to shield the membrane from temperature and pressure increases associated with the molding operation of the bracket body. The bracket assembly may improve the ability of the electronic device to prevent liquid ingress.

A method of making an article includes mixing a filler material and a polymer matrix material to produce a composite material, introducing the composite material produced by the mixing into a mold of a desired shape, and removing an article having the desired shape from the mold. The resulting article has a water absorption of less than about one percent and the filler material comprises vitreous china.

A method of making an article includes mixing a filler material and a polymer matrix material to produce a composite material, introducing the composite material produced by the mixing into a mold of a desired shape, and removing an article having the desired shape from the mold. The resulting article has a water absorption of less than about one percent and the filler material comprises vitreous china.