Methods of treating fibers comprising a polymer including at least one of a vinyl acetate moiety or a vinyl alcohol moiety, and resulting fibers or the products comprising the resulting fibers are disclosed. In an example embodiment, a fiber having a surface region and an interior region, includes a polymer comprising at least one of a vinyl acetate moiety or a vinyl alcohol moiety chemically modified with a modification agent. The fiber has a transverse cross-section including the interior region comprising the polymer having a first degree of modification and the surface region comprising the polymer having a second degree of modification greater than the first degree of modification.

Methods of treating fibers comprising a polymer including at least one of a vinyl acetate moiety or a vinyl alcohol moiety, and resulting fibers or the products comprising the resulting fibers are disclosed. In an example embodiment, a method of treating fibers includes contacting a surface of a fiber comprising the polymer with a modification agent to chemically modify at least a portion of the polymer with the modification agent in a region of the fiber comprising at least the surface of the fiber to form a modified fiber.

The present disclosure provides a method for producing a cell-culturing polyvinyl alcohol-based nanofiber structure, the method comprising: electrospinning an electrospun solution to form a nanofiber mat, wherein the electrospun solution contains polyvinyl alcohol (PVA), polyacrylic acid (PA) and glutaraldehyde (GA); crosslinking the nanofiber mat via a hydrochloric acid (HCl) vapor treatment; and treating the crosslinked nanofiber mat with dimethylformamide (DMF) solvent to crystallize the nanofiber mat.

Reinforcing fibers containing hydrophilic fibers and an adhesive component, wherein at least a part of the surfaces of the hydrophilic fibers have the adhesive component, the adhesive component contains a modified conjugated diene rubber having a hydrogen-bonding functional group in a part of the conjugated diene rubber, and the number of the hydrogen-bonding functional groups in the modified conjugated diene rubber is 2 to 150 per molecule on average; a method for producing the reinforcing fibers; and a molded article using the reinforcing fibers.

Provided are an artificial cornea having sufficient strength and optical properties, in which deviation or infection of the artificial cornea is restrained, and a method for manufacturing the artificial cornea. According to the present invention, the method for manufacturing the artificial cornea includes a nonwoven fabric preparation step of preparing a nonwoven fabric formed therein with a through-hole, and a gel arrangement step of arranging an aqueous polymer gel to cover the through-hole.

The invention provides a method for cutting a composite membrane material, firstly, manufacturing a composite membrane material, the composite membrane material is formed by combining an elastic membrane material with at least one shaping membrane, the elastic membrane material has stretchability and elasticity; the shaping membrane is capable of dissolving in water, and a rigidity thereof is greater than that of the elastic membrane material, and a ductility thereof is lower than that of the elastic membrane material; and cutting the composite membrane material into a plurality of composite filaments with a cutting device, and each of the composite filaments comprises an elastic filament and at least one shaping filament. The composite filament can be used by textile machinery to make textiles. Dissolving the shaping filament in the composite filament is capable of obtaining the elastic filament.

The invention relates to an elastic thread with limited elasticity, comprising: an elastic thread and a shaping layer combined with the elastic thread. The elastic thread itself has stretchable elasticity; the shaping layer is a high polymer material capable of dissolving in water. When the elastic thread is kept in a combined state with the shaping layer, an elasticity of the elastic thread is greatly reduced, and the elastic thread can be made into a textile, or used as an upper thread for sewing threads and embroidery threads, or as an upper thread for jacquard weave. When the shaping layer is dissolved, the elastic thread restores its original elasticity. The textile made with the elastic thread is soft and has stretchable elasticity.

Techniques for producing an article having hollow structures are described herein. The disclosed techniques include weaving a plurality of yarns to form a woven fabric, wherein the plurality of yams each comprise a dissolvable core, and the dissolvable core comprises polyvinyl alcohol (PVA) having a water solubility; neutralizing an alkaline before drying the woven fabric to maintain the water solubility of the PVA; and washing the woven fabric or a garment made by the woven fabric to at least partially remove the dissolvable core.

A water filtration membrane is provided, capable of removing heavy metal ions, filtering out particulates, filtering out bacteria, as well as removing herbicides and volatile organic compounds (VOCs) from water. The membrane is composed of a mat of randomly oriented nanoparticle-coated nanofibers. The nanofibers are covalently bonded to a plurality of substantially uniformly-distributed ceramic nanoparticles embedded in or adhered on the surface of the polymer nanofibers through reactive functional groups. The ceramic nanoparticles have a pattern of deep grooves formed on the nanoparticle surfaces. The bonding of the nanoparticles to the nanofibers is sufficient to retain the nanoparticles on the nanofiber surfaces when water flows through the water filtration membrane. The diameter of the nanofibers is 50-200 nm. The size of the nanoparticles is <40 nm, with a zeta potential of 40 to 45 mV in a dispersion medium. The nanoparticle deep grooves have an average size of approximately 1.2 nm or less.

A cloth containing a fiber having on a surface a polyacetal copolymer containing a prescribed amount of oxyalkylene unit(s), wherein the cloth exhibits a q.sub.max value of at least 0.2 W/cm.sup.2, when the cloth is brought into contact with a heat storing plate of 40 C. under a contact pressure of 0.098 N/cm.sup.2 in an environment at a temperature of 20 C. and at a relative humidity of 65%, is superior in contact cold sensation, colorfastness, quick drying property and gloss.