FM^® 475 BMI Syntactic Core

Click here to view the datasheet (Adobe Acrobat file).

FM 475 is a BMI syntactic core material, which is reinforced with hollow glass micro balloons. FM 475 syntactic core is designed as a cost and/or weight saving alternative in the manufacture of thin, stiffness critical composite panels, below 0.20 inches (5.1mm) thick.

FM 475 syntactic core was based on CYCOM 5250-4 resin chemistry to provide a high temperature capability with a service rating up to 425° F. It is compatible with, and will co-cure with, and will co-cure without the use of an adhesive film, CYCOM 5250-4 prepreg as well as other BMI resin systems

Standard FM 475 is supplied with a 104 glass scrim as a carrier, which improves handling as well as the materials flexural strength. Alternative carriers, such as carbon, glass or Kevlar* mat can be provided upon request. FM 475 is supplied in sheet or roll form between two layers of release paper.

* Product of E. I. duPont de Nemours

Features and Benefits

• Based on CYCOM 5250-4 bismaleimide resin chemistry
• Service temperature from –67°F (–55°C) to 400°F (204°C)
• 3 % volatiles evolved during cure
• Can be co-cured with BMI prepreg and adhesive systems
• Good tack and pliability
• Can be supplied at various film thicknesses