A footwear is for wearing on a foot of a user. The footwear includes at least one component (ex. only one single component, or a plurality/combination of different components, etc.) selected from an upper, a lining, a midsole, an outsole, an insole and at least one lace. The at least one component is made of a material based on a lignocellulose substance and having been converted into a corresponding fabric (ex. a bamboo lyocell fabric, etc.), without, or at the very least, with reduced chemicals or synthetics like rayon (polyester). The resulting footwear has various advantages in terms of “sustainability” and “functionality”, as well as other advantages, when compared to conventional footwear.

The present invention relates to a composition of a hot-melt adhesive film and a method for producing a shoe sole. The composition of the hot-melt adhesive film comprises a hot-melt adhesive material and an electromagnetic radiation absorbing material. The hot-melt adhesive material includes ethylene vinyl acetate and thermoplastic materials. The electromagnetic radiation absorbing material is uniformly dispersed in the hot-melt adhesive material. Energy of an electromagnetic radiation can be absorbed by the electromagnetic radiation absorbing material, thereby producing thermal energy, further increasing temperature and adhering property of the hot-melt adhesive film. Therefore, a midsole and an outsole of the shoe sole can be adhered by the hot-melt adhesive film. Further, the hot-melt adhesive film is made from recyclable materials. Therefore, the hot-melt adhesive film is fully recyclable.

An article of footwear is provided and includes an upper and a sole attached to the upper, where the sole includes a shell and an outsole attached to the shell, and the shell defines an interior space. A midsole is positioned in the interior space and is removably attached to the shell.

Footwear and footwear production process comprises steps that include the reuse of raw materials previously used in footwear or other sources. Such a process also provides for the reduction of waste and environmental impact as well as the elimination of water consumption. A footwear, also the object of the present invention, comprises renewable origin, natural, recycled and recyclable components, being a sustainable product, ecologically viable and inserted in the context of Circular Bio Economy. The footwear presents quality standards in accordance with standard technical standards of quality, overcoming challenges related to obtaining comfortable and simultaneously sustainable shoes.

A separable footwear article may comprise an outsole oriented at the bottom of the footwear and configured for ground contact, the outsole comprising a first material; an upper portion releasably coupled to the outsole with thread using chain stitching, the upper portion comprising a second material different from the first material; and an insole removeably disposed adjacent the upper portion and the outsole, the insole comprising a third material different from the first material and the second material; wherein the outsole, the upper portion, and insole are capable of being separated by releasing the thread and hand pulling the thread from the footwear article.

A shoe including a component formed at least in part from a recycled thermoplastic material is disclosed. The recycled thermoplastic material may be derived from scrap material from an operation of making another component of the shoe. The recycled thermoplastic material may be derived at least in part from scrap thermoplastic foam from an operation of making a sole component of the shoe, but the shoe component including the recycled thermoplastic material may have a density greater than that of the sole component. Both shoe components may be bio-based. Methods for making shoe components including the recycled thermoplastic material are also disclosed.

Physical foaming a footwear component with a single-phase solution of a polymeric composition and a supercritical fluid is provided. The method include temperature conditioning a mold and then engaging the mold with a robot that conveys the mold to a press. At the press a gas counter pressure is applied to a cavity of the mold before injecting a single-phase solution of a polymeric composition and a supercritical fluid into the cavity of the mold. The process continues with releasing the gas counter pressure from the cavity of the mold and then removing the footwear component from the cavity of the mold. The parameters of the method are configured for the formation of the footwear component in an automated manner.

In example aspects, materials are repurposed for article manufacturing. That is, in some instances, materials in the manufacturing supply chain are potentially subject to disposal. However, aspects of this disclosure sustainably repurpose those materials (that might otherwise be disposed of) to be used in articles. In some aspects, the repurposed materials may be obscured with a concealing layer.

A separable footwear article may comprise an outsole oriented at the bottom of the footwear and configured for ground contact, the outsole comprising a first material; an upper portion releasably coupled to the outsole with thread using chain stitching, the upper portion comprising a second material different from the first material; and an insole removeably disposed adjacent the upper portion and the outsole, the insole comprising a third material different from the first material and the second material; wherein the outsole, the upper portion, and insole are capable of being separated by releasing the thread and hand pulling the thread from the footwear article.

In example aspects, materials are repurposed for footwear manufacturing. That is, in some instances, materials in the footwear manufacturing supply chain are potentially subject to disposal. However, aspects of this disclosure sustainably repurpose those materials (that might otherwise be disposed of) to be used in footwear articles. In some aspects, the repurposed materials may be obscured with a concealing layer.