Described herein is a continuous process fear modifying the properties of polyester and polyester based fibers, such as a poly(butylene terephthalate) (PBT) fiber, comprising subjecting the PBT fiber to alkaline hydrolysis, and optionally further comprising functionalizing the PBT fiber by solution grafting such as fluorination. The alkaline hydrolysis and optionally subsequent functionalization such as fluorination process can be continuous, following the melt blowing/spinning or spun-bonding process. Also described is a nonwoven PBT fiber mat obtained by the surface modification process. Further described is a filtration device comprising the nonwoven PBT fiber mat.

Described herein is a continuous process fear modifying the properties of polyester and polyester based fibers, such as a poly(butylene terephthalate) (PBT) fiber, comprising subjecting the PBT fiber to alkaline hydrolysis, and optionally further comprising functionalizing the PBT fiber by solution grafting such as fluorination. The alkaline hydrolysis and optionally subsequent functionalization such as fluorination process can be continuous, following the melt blowing/spinning or spun-bonding process. Also described is a nonwoven PBT fiber mat obtained by the surface modification process. Further described is a filtration device comprising the nonwoven PBT fiber mat.

A nonwoven web comprising a layer of polymeric fibers, wherein, based on the total number of polymeric fibers, at least 10% the polymeric fibers in said layer are coarse fibers having a fiber diameter of 4 m or more, and at least 10% of the polymeric fibers in said layer are fine fibers having a fiber diameter of 2 m or less. Also described herein is a method for making the nonwoven web, comprising melt-blowing a polymer mixture comprising two immiscible or partially miscible polymers.

A nonwoven web comprising a layer of polymeric fibers, wherein, based on the total number of polymeric fibers, at least 10% the polymeric fibers in said layer are coarse fibers having a fiber diameter of 4 m or more, and at least 10% of the polymeric fibers in said layer are fine fibers having a fiber diameter of 2 m or less. Also described herein is a method for making the nonwoven web, comprising melt-blowing a polymer mixture comprising two immiscible or partially miscible polymers.

An elastic body for holding a cosmetic, which can suppress that the cosmetic included in the elastic body for holding a cosmetic is taken out from the elastic body in a large amount at a time at the initial stage of use, wherein the elastic body for holding a cosmetic has a three-dimensional structure, and at least a dense fibrous surface layer and a sparse fibrous substrate; a cosmetic-containing elastic body in which a cosmetic is included in the elastic body for holding cosmetic; and a cosmetic article having the cosmetic-containing elastic body.

An elastic body for holding a cosmetic, which can suppress that the cosmetic included in the elastic body for holding a cosmetic is taken out from the elastic body in a large amount at a time at the initial stage of use, wherein the elastic body for holding a cosmetic has a three-dimensional structure, and at least a dense fibrous surface layer and a sparse fibrous substrate; a cosmetic-containing elastic body in which a cosmetic is included in the elastic body for holding cosmetic; and a cosmetic article having the cosmetic-containing elastic body.

A nonwoven recyclable fabric and associated methods are provided. The fabric is formed from 100% polyester, and may also include surface coatings such as hydrophilic coatings to promote heat transfer as well moisture vapor transmission rates and/or a silicone coating to promote fabric smoothness and reduce abrasiveness of the fabric.

A process for forming a nonwoven composite begins with forming a first nonwoven from a plurality of primary fibers and optionally binder fibers. A second nonwoven layer is formed from a plurality of bulking fibers and binder fibers. A thermoplastic elastomeric film is placed between the two nonwoven layers, the film containing a thermoplastic elastomeric polymer having an elongation at break greater than 300% and a max softening point (thermomechanical analysis end point) between 150 C. and 200 C. as tested according to ASTM E2347-04. The layers are needled together creating a plurality of holes in the thermoplastic elastomeric layer and moving a portion of the primary fibers from the first nonwoven layer into the second nonwoven layer. The needled stacked layers are heated to alter the median size of the holes in the thermoplastic elastomeric film forming the nonwoven composite.

A process for forming a nonwoven composite begins with forming a first nonwoven from a plurality of primary fibers and optionally binder fibers. A second nonwoven layer is formed from a plurality of bulking fibers and binder fibers. A thermoplastic elastomeric film is placed between the two nonwoven layers, the film containing a thermoplastic elastomeric polymer having an elongation at break greater than 300% and a max softening point (thermomechanical analysis end point) between 150 C. and 200 C. as tested according to ASTM E2347-04. The layers are needled together creating a plurality of holes in the thermoplastic elastomeric layer and moving a portion of the primary fibers from the first nonwoven layer into the second nonwoven layer. The needled stacked layers are heated to alter the median size of the holes in the thermoplastic elastomeric film forming the nonwoven composite.

A collagen containing-plastic masterbatch of which the composition includes a thermoplastic polymer and a collagen is provided, wherein the collagen is uniformly distributed in the thermoplastic polymer, and wherein in the collagen containing-plastic masterbatch, the collagen content is about 1-50 wt %. A collagen containing-plastic fiber formed by at least one kind of plastic masterbatch through melt spinning is further provided, wherein the at least one kind of plastic masterbatch includes the above-mentioned collagen containing-plastic masterbatch.