A new transparent, flexible biopolymer

25-Mar-11
A new transparent, flexible biopolymer has been launched by FKuR, called Bio-Flex F 2201 CL It is in line with the other resins in the Bio-Flex family, can be processed easily on standard LDPE blown film lines and converting equipment. With a renewable resource content of approximately 60 % this grade is a consistent further development of the Bio-Flex family. Its mechanical properties exhibit a high elongation and flexibility along with good puncture resistance. Consequently Bio-Flex F 2201 CL can ideally be used to adjust the properties of all the available Bio-Flex family resins. However, due to its good interply strength, Bio-Flex F 2201 CL is recommended to be used as a mid-layer in a co-extruded structure. As a result of its mechanical properties it is the perfect partner for Bio-Flex A 4100 CL in a transparent 3-layer combination. Bio-Flex A 4100 CL is a clear but stiff material with properties comparable to PP. The combination of these two transparent grades offers superb and unmatched clarity for a biodegradable blown film available today while maintaining a very high content of renewable resource material. This is between 60 - 80% depending on the variation of polymers of the final structure. As both polymers are clear, the transparency of a 20¦Ìm film, for example, is close to 91% (light transmission figure). The toughness and high tear resistance are the result of the core Bio-Flex F 2201 CL layer and the renewable content of a 20 micron 3-layer structure with a layer ratio of 20 / 60 / 20 (%) is around 70%. Using such a structure, this film is ideal for VFFS applications.
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