Bubble Film and Bubble Mailer Compound (PLA/PBAT)

About This Product

A pellet compound of polylactic acid and poly(butylene adipate-co-terephthalate) for blown film that is then formed into bubbles. The blend is balanced so the web has the extensibility to be drawn into a cavity while hot and the chain stiffness to resist gas transmission once cooled. Bubble film only protects while the bubbles stay inflated, so the film has to resist air loss through the wall as well as survive forming. Forming is a hot stretching step in which the web is drawn into the cavities of a vacuum roller, and the material must thin evenly rather than neck at one point, because a bubble thinnest at its crown loses burst strength and barrier where the impact lands. Retention is then permeation, as the gas inside dissolves into the wall and diffuses out at a rate set by the residual wall thickness and by how much crystalline, low-mobility material that wall contains. This compound is formulated for that combination in a biodegradable system, on standard blown film lines. It covers both plain bubble film and the laminated construction used for padded mailers, where the bubble layer is bonded to an outer film. Supplied as a raw material for processing on the buyer's own line. We do not produce finished articles. It is used in bubble film, in padded mailers and in protective e-commerce packaging. Bio Green Chem supplies the bubble film and bubble mailer compound to specification on film gauge, bubble geometry, air retention and lot size.