Plastisol foams

Compression Molding of Low-Density Foam Casting of Soft Plastisol Foam Extrusion of Structural Foam Injection Molding of Structural Foam Injection Molding Elimination of Sink-Marks... 

Typical Vinyl Plastisol Foam Formulations Ingredients... 

Applications coated fabrics, cornices, curtain rails, doorframes, guide rails for shutters, furniture profiles, roofing products, plastisol foams, shoe soles, skirting boards, sofit boards, wall and ceiling panelhng, wallpaper, window sills, wood-replacement products... 

Plastisol foam stabilizers (Section 14.5) may also function as viscosity depressants. With foamed plastisols, these factors must be considered together. Conversely, the viscosity depressants listed above typically also function as air release agents. SUicone additives can assist in all three areas, but must be used with caution if operations, even on other lines, involve appUcations requiring adhesion, printing, or decorating. It makes no sense to have unreasoning prejudice against such additives, but rather to be certain that they are used properly. 

PVC copolymers PVC foams P V C formulation PVC plasticizers PVC plastisols PVC resins... 

There are two principal PVC resins for producing vinyl foams suspension resin and dispersion resin. The suspension resin is prepared by suspension polymerization with a relatively large particle size in the 30—250 p.m range and the dispersion resin is prepared by emulsion polymerization with a fine particle size in the 0.2—2 p.m range (245). The latter is used in the manufacture of vinyl plastisols which can be fused without the appHcation of pressure. In addition, plastisol blending resins, which are fine particle size suspension resins, can be used as a partial replacement for the dispersion resin in a plastisol system to reduce the resin costs. 

The elastomer process is very similar to the Dennis process. It involves a number of steps in which a gas, formerly carbon dioxide and now fluorocarbon, is mixed with a plastisol under pressure. When released to atmospheric pressure, the gas expands the vinyl compounds into a low density, open-ceUed foam which is then fused with heat. 

The Kleber-Colombes rigid PVC foam (253,254) is produced by compression mol ding vinyl plastisol to react and gel the compound, followed by steam expansion. The process involves mixing, mol ding, and expansion. The formulation consists of PVC, isocyanate, vinyl monomers such as styrene, anhydrides such as maleic anhydride, polymerization initiators, FC-11, and nucleators. The ingredients are mixed in a Wemer-Pfleiderer or a Baker Perkins... 

In knife-over-roll or blade coating, the coating material is placed on the fabric surface behind a knife, or doctor blade, and metered according to the gap set between the blade and the fabric surface. This method is used to apply thick coatings of highly viscous materials such as pastes, plastisols, or foams. 

PVC Plastisols 1940 M-H VG G G G Slush and rotationally molded, foamed, extruded Used in coating machines to cover paper, cloth and metal... 

The type of processing in the melt state, in the liquid state (plastisols or organosols), foams. Plastisols have very special mechanical, thermal and chemical properties due to their high flexibility and the use of large amounts of plasticizers. The particular morphology of foams induces ... 

This process is generally used for thermosets, such as polyurethane, polyisocyanurate, phenolic, unsaturated polyester and silicone foams, but it is also used for plastisols or PVC... 

Foams are made by the addition of blowing agents to the plastisol. These may be continuously applied to a moving substrate which includes a pass at an elevated temperature where foaming occurs, followed by fusion of the plastisol. 

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