Abstract: A method of producing a porous film comprises subjecting a fibrous material comprised of fibers of a film forming material to conditions of heat and pressure to covert the fibrous material to a porous film. The method allows the production of film material having substantially uniform pore sizes. For example, the pore size distribution of the film may be such as to have a ratio of maximum pore size:mean flow pore of less than 1.2, e.g., less than 1.1.

Abstract: A hanger strap has a connection portion which, in use, is connected to a component, particularly part of a medical fluid administration kit, which provides a narrow-mouthed slot. An elongate strap body extends from the connection portion and has a wide portion, a narrow portion and a hanging means (usually a loop). For storage, the strap lies flat against the component. For use, the strap is bent up and its narrow portion is passed into the slot through the mouth. The strap is pulled through the slot until the wide portion is therein. This cannot escape through the mouth, and formations (e.g. ratchet teeth) resist its withdrawal.