Maro Publications



From 04/25/2014 to 5/21/2012

Maro Encyclopedia


Patent Abstracts

Patent Titles


Auxetic Foams

Backer Rods

Carbon Foams

Carbon Nanofoams

Carbon Foams

Ceramic Foam

Coated Foams

Coatings: Porous

Expandable Materials

Extrusion: Foams

Foam Applications


Foam Rubber

Foams: Ceramic

Foams: Closed Cell

Foams: Macroporous

Foams: Molding

Foams: Open Cell

Honeycomb Structures

Injection Molding: Foams

Metallic Foams

Microporous Materials

Molding Foam


Polylactic Acid (PLA) Foams

Polypropylene (PP) Foams

Polyurethane Foams


Porous Particles




1. A foam is a substance that is formed by trapping pockets of gas in a liquid or solid. A bath sponge and the head on a glass of beer are examples of foams. In most foams, the volume of gas is large, with thin films of liquid or solid separating the regions of gas.

An important division of solid foams is into closed-cell foams and open-cell foams. In a closed-cell foam, the gas forms discrete pockets, each completely surrounded by the solid material. In an open-cell foam, the gas pockets connect with each other. A bath sponge is an example of an open-cell foam: water can easily flow through the entire structure, displacing the air. A camping mat is an example of a closed-cell foam: the gas pockets are sealed from each other, and so the mat cannot soak up water.

Foams are examples of dispersed media. In general, gas is present in large amount so it will be divided in gas bubbles of many different sizes (the material is polydisperse) separated by liquid regions which may form films, thinner and thinner when the liquid phase is drained out of the system films.[1] When the principal scale is small, i.e. for a very fine foam, this dispersed medium can be considered as a type of colloid.

The term foam may also refer to anything that is analogous to such a foam, such as quantum foam, polyurethane foam (foam rubber), XPS foam, Polystyrene, phenolic, or many other manufactured foams.

(Wikipedia, Foams, 5/21/2012)


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These pages list the links as they are found.  Some will abstracted and added to Maro Topics. (RDC 2/7/2012)


Roger D. Corneliussen

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921


Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen

* Date of latest addition; date of first entry is 5/21/2012.