C6 Toughness
C6 is shorthand for the hexene co-monomer used in the Linear Low Density Polyethylene (LLDPE) from which the water tank is made (ethylene is the main monomer gas).
In LLDPE, the branching in the molecule is achieved through copolymerisation with monomers such as butene (C4), hexene (C6) or octene (C8). The toughness of the LLDPE is highly dependent on the short chain branch length, which is determined by the co-monomer used. A C6 co-monomer has a longer short chain branch length than a C4 co-monomer, and so on.
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