Process for the production of expanded Plastics silientes re - based on a condensation product of melamine formaldehyde

摘要

Method for producing Expanded Plastics Resilient base of a condensation product of melamine Formaldehyde. Skim is a solution or an aqueous dispersion containing precondensado melamine - formaldehyde, a Volatile Agent, Emulsifier, an expansion and a HARDENER.Foamed Plastic is heated from 1 to 180 minutes at a temperature of between 120 and 300 degrees. Before or after the heat treatment, The Plastic is compressed or Expanded several times by 40 to 90 100 original height and allowed to recover again.