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Compounding of phenol-formaldehyde moulding compositions

Although there are many variants in the process used for manufacturing moulding powders, they may conveniently be classified into dry processes and wet processes. [Pg.648]

For the manufacture of medium-shock-resisting grades the preblend of resin, filler and other ingredients does not readily form a hide on the mill rolls. In this case the composition is preblended in an internal mixer before passing on to the mills. [Pg.648]

Extrusion compounders such as the Buss Ko-Kneader have been used for mixing phenolic resins. It is claimed that they produce in some respects a better product and are more economical to use than mill-mixers. [Pg.649]

High-shock grades cannot be processed on mills or other intensive mixers without destroying the essential fibrous structure of the filler. In these cases a wet process is used in which the resin is dissolved in a suitable solvent, such as industrial methylated spirits, and blended with the filler and other ingredients in a dough mixer. The resulting wet mix is then laid out on trays and dried in an oven. [Pg.649]


See other pages where Compounding of phenol-formaldehyde moulding compositions is mentioned: [Pg.648]    [Pg.923]    [Pg.648]    [Pg.648]    [Pg.648]    [Pg.923]    [Pg.648]    [Pg.648]    [Pg.117]    [Pg.41]   


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Composite Compounder

Composition of Compounds

Formaldehyde compounds

Mould compound

Moulding compositions

Phenol compounds

Phenol formaldehyd

Phenol phenolic compounds

Phenol-Formaldehyde (Phenolics)

Phenol-formaldehyde

Phenol-formaldehyde mouldings

Phenolic composition

Phenolic compounds

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