  The physics of tightly packed structures of a wire and other threadlike
materials confined in cavities has been explored in recent years in connection
with crumpled systems and a number of topics ranging from applications to DNA
packing in viral capsids and surgical interventions with catheter to analogies
with the electron gas at finite temperature and with theories of
two-dimensional quantum gravity. When a long piece of wire is injected into
two-dimensional cavities, it bends and originates in the jammed limit a series
of closed structures that we call loops. In this work we study the extraction
of a crumpled tightly packed wire from a circular cavity aiming to remove loops
individually. The size of each removed loop, the maximum value of the force
needed to unpack each loop, and the total length of the extracted wire were
measured and related to an exponential growth and a mean field model consistent
with the literature of crumpled wires. Scaling laws for this process are
reported and the relationship between the processes of packing and unpacking of
wire is commented upon.
