A novel insole sheet and a process for the preparation thereof

A novel insole sheet and a process for the preparation thereof

A novel porous insole sheet based on polyetherurethane, polyesterurethane and their blends is prepared by coagulating the PU solution directly in mold using phase inversion method without any additives. PU sheets with different density, hardness and thickness can be made by changing the concentration, composition and volume of polymer solution.

The sheet is free from health hazards. This viscoelastic PU sheet is useful in making insole, heel-pad, metatarsal pad, cushion pads etc. for application in footwear industry, especially for fabricating therapeutic footwear, orthotics, artificial limb and sports shoe.

The invention enables lower cost of production while comparing to the currently available cushion systems, since the construction of cushion system does not involve layers of different materials of different thickness or density.

The invention has been applied for patent protection (Indian Patent application no. 775Del2008; Patent pending).

A Formulation for the preparation of material for making impression of an object

The invention relates to a material useful to capture three dimensional shape and size of an object for industrial applications. The material finds application for manufacturing custom made footwear and orthoses. It essentially enables taking impression of an object with the main objective of recording impression of the foot and subsequent mould making for customized footwear applications.  The method of making impressions using this material allows immediate casting of mould and reuse of the material.
The invention has been applied for Patent protection (Indian Patent application no. 49DEL2002; Patent pending).