From either a early 20th century, various types of specially made firm foams inherit utilize. A sale density of these foams made the two first-class when thermal insulators & flotation devices, & their lightness & sponginess mass produced the two ideal when packing and stuffings. A select few liquid foams likewise obtained utilizes inside extinguishing fires, especially oil fires.

Foam, in that pack meaning "bubbly liquid", is besides produced as an typically unwanted by-product in the manufacture of various substances. E.g., foam occurs as good condition in the chemical industry, especially for biochemical processes. Several biological substances, e.g. proteins, easily produce foam in agitation and/or aeration. Foam occurs as condition because it alters a liquid flow & blockades o transport from either air (so preventing microbic respiration around fermentation processes). For this understanding, antifoam compounds, like silicone oils, are added to halt these problems.

Foaming as much as a mouth can be a effect of rabies in animals. A term sea foam is used to describe a foam that forms in top of brine from either a action of waves. Someway, leavened bread is a foam, as a yeast drives a bread to rise by producing midget bubbles of flatulence in the dough.

Structure of foams
Very foams come often unordered & have a kind of bubble sizes. A learn of idealized foams is closely linked to the mathematical problems of space-filling and minimal surfaces. A Weaire-Phelan structure is believed to be a optimum unit cell of an regulated foam, when Plateau's Rules describe how films form structures in foams.

Types of manufactured foam
acoustic foam anti-static foam closed cell foam - a business firm nature and severity of foam Aerogel the world's lowest density solid Airex foam or FloTex foam Latex foam Microcellular plastic polychloroprene foam Neoprene polyethylene foam EVA foam or polyethylene vinyl acetate foam polyisocyanurate foam polystyrene foam Styrofoam polythene foam Syntactic foam, with highly high compressive strength. fire retardant foam or CMHR (Combustion Modified High Resillient) foam open cell foam - a other breathable & flexible foam polyurethane foam memory foam metal foam SEAgel — an ultralight biodegradable foam used as an insulator spray foam

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