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By: Lancotek  09-12-2011
Keywords: Injection Molding

MOLDABLE INTUMESCENT MATERIAL: Lancotek has developed a moldable intumescent material that is an Underwriters Laboratories (UL) certified component material. The moldable intumescent material has been formulated with low melting point resins to be used in an injection molding machine running at relatively low temperatures of 320 – 340 °F. Although low melting point resins have been used, this material is resistant to dimensional changes (creep) even when it is subjected to 194°F (90°C) for 24 hours.

This moldable material can be processed by standard injection molding practices to various shapes. It is formulated to be non-conductive when used for electrical applications but is suitable for non-electrical applications also. It starts to expand at about 375°F and expands by several times its original volume.

INTUMESCENT STRIP: The intumescent strip has been formulated to generate high expansion pressure with rapid expansion at relatively low temperature. This strip starts to expand at a temperature of 305°F and thus quickly seals a wall or floor opening. This strip continues to expand at temperatures well above the initial expansion temperature and thus maintains the sealing pressure throughout the duration of a fire test.

The intumescent strip can be cut to various widths and is typically sized to be 1/16” thick. It can be supplied as a continuous roll that can be cut by the end user with scissors. Although this is not currently UL approved, we can work with various end use manufacturers to get this fire tested through UL or Warnock Hersey. We expect that this would work well in fire collars and expansion joints.

Keywords: Injection Molding