Compreg-Resin-Treated Densified Wood

Compreg is a phenol-formaldehyde impregnated wood veneer laminate compressed under heat and pressure to a density of 1.35. It combines the properties of wood and plastic, being more stable than wood and lighter than metal. Compreg should not be confused with Impreg, which has only resin treatment, or Staypak, which is only compressed. Major woods used to produce Compreg are yellow birch and hard maple. Other resins tried with varying success are resorcinol, cresols, melamine-formaldehyde, and urea-formaldehyde. Physical properties of Compreg include: slow water absorption; high resistance to decay, termites, marine borers, acid and mild alkalis; high degree of natural polished finish; higher coefficient of thermal expansion than normal wood; high compressive strength values; and low tensile and impact values. Projected uses of Compreg, based on its long-wearing qualities, include turn tables for rubber extrusions, picker sticks and shuttles in the textile industry, household items, sporting equipment, and building construction.

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