A ladder strap (150) is made by joiningfor example, by co-moldinga
first, relatively supple material, defining a lower strap portion (155)
with a second, relatively hard material defining an upper strap portion (165).
The teeth (167) of the ladder strap are comprises substantially of the harder,
second material. In a preferred embodiment, the first and second materials are
thermoplastic urethanes, and the co-molding is done using an injection molding
process. The co-molding process may be accomplished with co-injection, wherein
the two materials are injected at about the same time, or the first material may
be injected into a first mold cavity and allowed to partially set, after which
the cavity is modified to accommodate the second material.
