GSA
GSA is a thermoplastic film form adhesive, protected by silicone paper. This type of adhesive film is ideal for combining different material.
This film form adhesive material should be applied to the inside of the upper, where the counter ends. It can also be applied to the area around the top-line of the shoe.
In this way the counter does not mark the upper, even when it is made of kid or other types of soft leathers.
By applying the film-form adhesive to the top-line of the shoe upper the G.S.A. film bonds the shoe upper and lining together, when it is processed through the Heat Setting Machine.
In this way the upper conforms perfectly to the shape of the last.
G.S.A. film form adhesive also has many other useful applications in the upper preparation / assembling area. E.g trims. |