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  2. Foam - Wikipedia

    en.wikipedia.org/wiki/Foam

    Order and disorder of bubbles in a surface foam One scale is the bubble: material foams are typically disordered and have a variety of bubble sizes. [ citation needed ] At larger sizes, the study of idealized foams is closely linked to the mathematical problems of minimal surfaces and three-dimensional tessellations , also called honeycombs .

  3. Foaming agent - Wikipedia

    en.wikipedia.org/wiki/Foaming_agent

    A foaming agent is a material such as a surfactant or a blowing agent that facilitates the formation of foam.A surfactant, when present in small amounts, reduces surface tension of a liquid (reduces the work needed to create the foam) or increases its colloidal stability by inhibiting coalescence of bubbles. [1]

  4. List of polyurethane applications - Wikipedia

    en.wikipedia.org/wiki/List_of_polyurethane...

    Industrial Insulation. Rigid polyurethane foam is used in various industries to provide thermal insulation to installations and pipes. In particular, the piping for district heating systems in Europe is primarily insulated using a pre-insulated pipes sandwich assembly composed of a steel heat service pipe, an insulating layer (polyurethane foam) and a polyethylene (PE) casing, which are bonded ...

  5. Polyurethane foam - Wikipedia

    en.wikipedia.org/wiki/Polyurethane_foam

    An assortment of polyurethane foam products for cushioning and insulation. Polyurethane foam is a solid polymeric foam based on polyurethane chemistry. As a specialist synthetic material with highly diverse applications, polyurethane foams are primarily used for thermal insulation and as a cushioning material in mattresses, upholstered furniture or as seating in vehicles.

  6. Continuous foam separation - Wikipedia

    en.wikipedia.org/wiki/Continuous_foam_separation

    Continuous foam separation is a chemical process closely related to foam fractionation in which foam is used to separate components of a solution when they differ in surface activity. In any solution, surface active components tend to adsorb to gas-liquid interfaces while surface inactive components stay within the bulk solution.

  7. Walmart's Black Friday sale is here: Shop the early deals ...

    www.aol.com/lifestyle/walmarts-black-friday-sale...

    Serta Cooling Gel Memory Foam Bed Pillow, Set of 2. $22 $54 Save $32. See at Walmart. Greenworks Leaf Blower . $198 $278 Save $80. See at Walmart. Inse Cordless 6-in-1 Vacuum. $76 $220 Save $144.

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