The method for producing wet spun fibers/a wet formed film using a double-walled pipe type micronozzle apparatus according to the present invention is a production method, wherein, in a step of extruding an internal phase comprising a fiber/film material and a good solvent for the fiber/film material in a linear form from the circular/rectangular end of the internal pipe of the apparatus into an external phase comprising a poor solvent for the fiber/film material, the external phase flowing in the external pipe of the apparatus, the ratio of the external phase flow rate to the internal phase flow rate is set to 1 or more, and further for the wet spun fibers, the external phase line speed at the orifice portion at which the internal phase and the external phase merge is set to 0.1 ms.sup.−1 or more.

The present invention provides a method for recycling a shoe (100), the shoe (100) comprising various components made from the same material class with varying densities, the method comprises milling (210) the shoe (100) to obtain a plurality of particles (212), the particles (212) having different material densities, mixing (240) the particles, applying heat (312) to the mixed particles (242) to obtain a melt of molten particles and extruding (317) the melt.

The present invention provides a method for recycling a shoe (100), the shoe (100) comprising various components made from the same material class with varying densities, the method comprises milling (210) the shoe (100) to obtain a plurality of particles (212), the particles (212) having different material densities, mixing (240) the particles, applying heat (312) to the mixed particles (242) to obtain a melt of molten particles and extruding (317) the melt.

The present invention provides a multi-layered interlaced membrane comprising at least one substrate layer including a plurality of first polymer-based microfibers; at least one nanofibrous layer including a plurality of second polymer-based nanofibers where each of the nanofibers has one or more nano-branches; at least one interlaced layer including a plurality of third polymer-based submicron fibers where each of the submicron fibers has one or more nano-branches and a plurality of fourth polymer-based nanofibers where each of the nanofibers has one or more nano-branches, wherein the third polymer-based submicron fibers are interlaced with the fourth polymer-based nanofibers; at least one submicron fibrous layer including a plurality of fifth polymer-based submicron fibers where each of the submicron fibers has one or more nano-branches. The nanofibrous layer is positioned onto the substrate layer; the interlaced layer is positioned onto the nanofibrous layer; the submicron fibrous layer is positioned onto the interlaced layer.

The present invention provides a multi-layered interlaced membrane comprising at least one substrate layer including a plurality of first polymer-based microfibers; at least one nanofibrous layer including a plurality of second polymer-based nanofibers where each of the nanofibers has one or more nano-branches; at least one interlaced layer including a plurality of third polymer-based submicron fibers where each of the submicron fibers has one or more nano-branches and a plurality of fourth polymer-based nanofibers where each of the nanofibers has one or more nano-branches, wherein the third polymer-based submicron fibers are interlaced with the fourth polymer-based nanofibers; at least one submicron fibrous layer including a plurality of fifth polymer-based submicron fibers where each of the submicron fibers has one or more nano-branches. The nanofibrous layer is positioned onto the substrate layer; the interlaced layer is positioned onto the nanofibrous layer; the submicron fibrous layer is positioned onto the interlaced layer.

Provided are a core material for a vacuum insulation panel, a vacuum insulation panel, an insulated container, and a method for manufacturing a core material for a vacuum insulation panel. A core material for a vacuum insulation panel includes: an intermediate layer containing a polyester fiber or a polypropylene (PP) fiber; and an outer layer laminated on the intermediate layer; wherein the outer layer contains a thermoplastic fiber capable of thermal bonding.

Provided are a core material for a vacuum insulation panel, a vacuum insulation panel, an insulated container, and a method for manufacturing a core material for a vacuum insulation panel. A core material for a vacuum insulation panel includes: an intermediate layer containing a polyester fiber or a polypropylene (PP) fiber; and an outer layer laminated on the intermediate layer; wherein the outer layer contains a thermoplastic fiber capable of thermal bonding.

The invention relates to a method for producing a zigzag-folded nonwoven material for a filter, wherein the nonwoven material is produced by a melt-spinning process, comprising the following work steps: folding the nonwoven material by means of a folding device, whereby a plurality of folds results, wherein the folds divide the nonwoven material into first limbs and second limbs such that the nonwoven material is folded in zigzag form; and subsequently welding a weld region of the first limb of a fold to at least one weld region of the second limb of a fold by means of a thermal-contact welding process, wherein a welded joint is formed between the two facing sides of the limbs of a fold. The invention furthermore relates to a corresponding apparatus and a corresponding nonwoven material.

The invention relates to a method for producing a zigzag-folded nonwoven material for a filter, wherein the nonwoven material is produced by a melt-spinning process, comprising the following work steps: folding the nonwoven material by means of a folding device, whereby a plurality of folds results, wherein the folds divide the nonwoven material into first limbs and second limbs such that the nonwoven material is folded in zigzag form; and subsequently welding a weld region of the first limb of a fold to at least one weld region of the second limb of a fold by means of a thermal-contact welding process, wherein a welded joint is formed between the two facing sides of the limbs of a fold. The invention furthermore relates to a corresponding apparatus and a corresponding nonwoven material.

A face mask for protection against infectious agents includes: a filter medium from spun nonwoven, which has multicomponent filaments, which are split at least partially into elementary filaments. In an embodiment, the filter medium includes at least two layers of spun nonwoven. In an embodiment, each layer of spun nonwoven has a basis weight of 10 to 100 g/m.sup.2.