| 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 [below 0.20 inches (5.1 mm) thick], stiffness critical composite panels. FM 475 syntactic core is based on CYCOM® 5250-4 resin chemistry to provide a high temperature capability with a service rating up to 425°F (218°C). It is compatible with CYCOM 5250-4 prepreg and other BMI resin systems. FM 475 will co-cure with these composites without the use of an adhesive film. Standard FM 475 is supplied with a 104 glass scrim as a carrier, which improves handling characteristics in addition to increasing the material’s flexural strength. Alternate 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. Features & Benefits: - Based on CYCOM 5250-4 bismaleimide resin chemistry
- Service temperature from -67 to 400°F (-55 to 204°C)
- Less than 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
Applications: - Thin composite panels where weight, cost and/or stiffness are critical
Information provided by Cytec, subsequently acquired by Solvay. |
