Pianka syntaktyczna' składa się z pustych w środku kuleczek z tworzywa
http://pl.dictindustry.com/duński-polski/kugler

Tworzy go pianka syntaktyczna, gdzie spoiwem jest żywica poliestrowa wypełniona mikro kulkami i mikro włókienkami.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&c...


High Strength and Impact Damage Tolerant Syntactic Foam for High
Performance Sandwich Structures

This study explored a novel higher strength and higher impact tolerant syntactic foam for composite sandwich structures. A unique microstructure was designed and realized through a unique manufacturing technology. The foam was fabricated by
dispersing rubber latex coated microballoons into a nanoclay and milled microfiber reinforced epoxy matrix. Each
component was designed to contribute to a desired property of the foam. The nanoparticle and microfiber served to
increase the strength and stiffness (stronger and stiffener); the microballoon served as a light-weight filler (lighter); and the
rubber coating served to increase the toughness and the impact tolerance (tougher). The manufacturing process for
developing this unique microstructure was developed. Both low velocity impact test and four-point bending test were
conducted on the foam core and sandwich beams. The test results showed a considerable increase in energy absorption
capacity and the capacity for retaining the residual bending strength. This multi-phase material contained structures bridging
over several length-scales. The SEM pictures showed that several mechanisms were activated to collaboratively absorb
impact energy, including microballoon crushing, interfacial debonding, matrix cracking, rubber pinning, fiber pull-out, and
fiber bridge-over. The localized and microscale damage insured that the sandwich beams retained its strength after the
impact.