Injection process

Advantages of injected soles on uppers

For over 30 years, Giasco has been producing safety footwear through a sole manufacturing process called injection. Specifically, the sole, after the injection of a series of liquid reagents into a mold, is formed directly onto the upper.

Over the years, this method has become the main process for the safety footwear sector, as it ensures more durable and resistant products compared to other methods such as gluing.

The first is called Carding, where the upper is scraped along the profile where the sole will be formed; the second is the actual injection, where different liquid elements are injected into the mold and, reacting together, solidify and form a single body with the previously carded upper; the third is trimming and finishing, where the shoe is cleaned of the excess sole.

Sole adhesion to upper

The main feature of injected soles is their adhesion to the upper. Thanks to the carding and injection phases, sole and upper form a single body, making it impossible for the sole to detach.

Sole softness

The machinery and robotic injectors managing the injection phase allow choosing among numerous sole densities.
This enables us to select the ideal sole softness depending on the sector of use and therefore to offer extremely high-performance safety footwear.

Greater product durability

The material used in our soles is polyurethane. This is one of the few materials that, even after many years from first use, maintains its physical characteristics. For this reason, it is said to have “memory”. This is very important because it prevents the footwear from deforming over time and causing the wearer to adopt harmful postures.

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