| 摘要 |
PURPOSE:Foam having improved and uniform foam structure, improved physical performances such as flexural strength, impact strength, partial compression strength, etc., improved heat resistance and solvent resistance, obtained by expanding nylon 4, 6 resin with a blowing agent. CONSTITUTION:Foam having 0.005-0.8g/cm<3> apparent density obtained by expandig nylon 4, 6 resin with a blowing agent. A nylon 4, 6 resin having >=1.8, preferably >=2.5 relative viscosity in sulfuric acid (0.5g/100ml concentration at 25 deg.C) is used as the nylon 4, 6 resin. Methylene chloride, chloroform, trichlorofluoromethane, etc., are used as the blowing agent.
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