Multilayer insole
OwnerAnna NIKITINAinventor
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Abstract
Multilayer insoles made of several layers of polymeric materials and used for insertion into footwear, for example, for hygienic and orthopedic purposes. Multilayer insoles having increased manufacturability, absorption properties and low cost of environmentally friendly raw materials obtained from renewable sources.
Claims19
A multilayer insole comprising:
- a base configured to fit to an inside of a shoe sole;
- a foam layer located above the base;
- and
- a fabric layer located above the foam layer;
- wherein the base comprises a rigid bio-based polyurethane;
- wherein the foam layer comprises a foamed bio-based polyurethane;
- and
- wherein the fabric layer comprises at least one of lyocell and bio-based polyamide.
The multilayer insole of claim 18, wherein the thermoplastic polymer is selected from a group consisting of bio-based thermoplastic polyurethane Ellastolan, bio-based ethylene vinyl acetate SVT manufactured by Braschem, polystyrene thermoplastic elastomer MEGOL BIO manufactured by Trinseo and thermoplastic elastomers Terraprene manufactured by FKuR Polymers GmbH and Dryflex Green manufactured by Hexpol.
A method of making a multilayer insole comprising the steps of:
- providing a base configured to fit to an inside of a shoe sole;
- placing a foam layer above the base and adhering the foam layer to the base;
- and
- placing a fabric layer above the foam layer and adhering the fabric layer to the foam layer;
- wherein the base comprises a rigid bio-based polyurethane;
- wherein the foam layer comprises a foamed bio-based polyurethane;
- and
- wherein the fabric layer comprises at least one of lyocell and bio-based polyamide.
Dependencies are inferred from the claim text.