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Additives blowing agents

Polyether-based foams account for more than 90% of all flexible polyurethane foams. The properties of foams are controlled by the molecular structure of the precursors and the reaction conditions. In general, density decreases as the amount of water increases, which increases the evolution of carbon dioxide. However, the level of water that can be used is limited by the highly exothermic nature of its reaction with isocyanate, which carries with it the risk of self-ignition of the foamed product. If very low density foams are desired, additional blowing agents, such as butane, are incorporated within the mixing head. [Pg.390]

Chemicals and Additives Blowing Agents Catalyst and Curing Agents Colorants (Pigments, Dyes, Concentrates, Pastes) Fillers... [Pg.23]

Special Additives Blowing Agents, Flame Retardants, Pigments, Fillers, and Reinforcements... [Pg.561]

Several more recent variations of the film-to-fiber approach result in direct conversion of film to fabric. The film may be embossed in a controlled pattern and subsequently drawn uniaxiaHy or biaxiaHy to produce a variety of nonwoven products (47). Addition of chemical blowing agents to the film causes fibrillation upon extmsion. Nonwovens can be formed directly from blown film using a unique radial die and control of the biaxial draw ratio (48)... [Pg.320]

In the paste coating method, a PVC paste, which contains emulsion-polymerized PVC and additives, is appHed onto a substrate and heated to gelation before fusion to produce a coating layer. This method is employed for products with a thin layer, ie, of 0.007—0.05 mm thickness. For foamed vinyl-coated fabrics, a substrate is laminated onto a transfer paper on which a PVC paste containing a foam-blowing agent has been appHed and geUed. After removal of the transfer paper, the paste is blown. [Pg.93]

Comparatively little information is available concerning the use of additives in commercial grades of polycarbonate. Pigments, heat and ultraviolet stabilisers, blowing agents and fire retardants are used but the range of materials available... [Pg.566]

Additives (antioxidants, antiozonants, softeners, tacfdfiers, peptisers, scorch inhibitors, colorants, flame retardants, blowing agents, process aids, etc.)... [Pg.32]

Chemical blowing agents (CBAs). These are solids that decompose to give a gas at the processing temperature. In addition to the demands above, the CBA must possess the following ... [Pg.96]

See other pages where Additives blowing agents is mentioned: [Pg.3825]    [Pg.44]    [Pg.699]    [Pg.571]    [Pg.3825]    [Pg.44]    [Pg.699]    [Pg.571]    [Pg.266]    [Pg.388]    [Pg.404]    [Pg.405]    [Pg.415]    [Pg.285]    [Pg.288]    [Pg.334]    [Pg.495]    [Pg.308]    [Pg.308]    [Pg.521]    [Pg.55]    [Pg.341]    [Pg.349]    [Pg.332]    [Pg.152]    [Pg.804]    [Pg.999]    [Pg.148]    [Pg.110]    [Pg.174]    [Pg.240]    [Pg.206]    [Pg.11]    [Pg.12]    [Pg.723]    [Pg.264]    [Pg.337]    [Pg.337]    [Pg.386]    [Pg.87]    [Pg.96]    [Pg.98]    [Pg.59]   
See also in sourсe #XX -- [ Pg.124 , Pg.279 , Pg.280 ]

See also in sourсe #XX -- [ Pg.21 ]

See also in sourсe #XX -- [ Pg.10 ]



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