A medical base material for an indwelling cardiovascular device in which a unique knitted structure made of multifilaments containing ultra-fine fibers can maintain the antithrombotic property through the early endothelialization has improved storage property in a sheath catheter and mechanical strength. The medical base material includes a knitted fabric made of multifilaments containing 30 wt % or more of ultra-fine fibers having a single thread diameter of 1 μm to 10 μm, and heparin, a heparin derivative, or a pharmaceutically acceptable salt thereof, which is chemically bound to the surface of the ultra-fine fibers, wherein: the knitted fabric has a basis weight of 5 mg/cm.sup.2 to 20 mg/cm.sup.2, a thickness of 200 μm or less, and a water permeability of 1000 mL/min/cm.sup.2 to 10,000 mL/min/cm.sup.2 at a pressure of 120 mmHg.

The present disclosure provides an antimicrobial alginate fiber, a method for manufacturing an antimicrobial alginate fiber dressing thereof, and an application thereof. When the cationic polymer polyhexamethylene guanide salt is mixed with the anionic polymer alginate, the antimicrobial activity of the guanide salt is quickly passivated. The present disclosure achieves a lower content of polyhexamethylene guanide salt in an alginate dressing with good long-term antimicrobial activities. The polyhexamethylene guanide salt has a low dissolution rate, and significantly reduces a potential risk of carcinogenicity, mutagenicity and reproductive toxicity.

In general, coated fibers, methods of bonding a coating to fibers, and composite materials prepared from coated fibers are provided. The coated fiber is created with a surface that is compatible with and bonds to the polymer resin used in composite materials. In another aspect, the coating may exhibit additional functionality, such as water repellency, fire resistance, or odor control. More specifically an atmospheric pressure plasma process is applied to the fibers to bond coating materials to the fiber surface and to cure the coating surrounding the fiber surface. Optionally, radiation is used in the process to cure the coating. Finally, composite materials and parts may be made from the coated fibers that exhibit high strength and improved mechanical properties over composites made with uncoated fibers. Alternatively, a natural fiber reinforced composite material is made from coated natural fibers that has improved mechanical properties and decreased water absorption.

A product for incorporating ultraviolet radiation protection and antimicrobial protection into a synthetic polymer is disclosed which has a quantity of zinc oxide particles modified with a layer of a reactive group that forms a bond with a quantity of synthetic polymer chips having C—H bonds. A product for incorporating ultraviolet radiation protection and antimicrobial protection into a synthetic polymer prior to forming a synthetic material is also disclosed which has a quantity of synthetic polymer chips and a quantity of zinc oxide particles modified with a layer of a reactive group that forms a bond with the quantity of the synthetic polymer chips.

The present invention relates to a waterborne sizing composition for treating natural fibers to be used as reinforcing material in thermoplastic, comprising: (a) a polymeric material having structure (I) wherein, R represents an alkyl group, X represents a reversible covalently bonded crosslinkable group, p, q, and r represent order on a main polymer chain, wherein the total sum of order greater than 50; (b) a water-soluble metal complex having an antimicrobial property; and (c) a redox active water-soluble compound.

##STR00001##

A reactive antibacterial compound and a preparation method thereof are provided herein. The reactive antibacterial compound is represented by the general formula (I) or (II): ##STR00001##
wherein R.sub.1 represents OCN-L-NHCOOR′, OCN-L-NHCONHR′, OCN-L-NHCOSR′, OCN-L-COOR′, or OCN-L-COONHR′. G1 represents OCN-M-NHCOOG′, OCN-M-NHCONHG′, OCN-M-NHCOSG′, OCN-M-COOG′, or OCN-M-COONHG′. L, M, R′ and G′ independently for each occurrence represent divalent alkyl and cycloalkyl having from 1 to 18 carbon atoms, optionally substituted by up to 18 heteroatoms. R.sub.4 and G.sub.4 independently for each occurrence represent a divalent alkyl and cycloalkyl having from 1 to 18 carbon atoms, optionally substituted by at most 18 heteroatoms. G.sub.2 and G.sub.3 independently for each occurrence represent —H, —F, —Cl, —Br, —I, —OCH3, —OCH2CH3, —OPr, —CN, —SCN, —NO, —NO2, a monovalent unsubstituted or substituted alkyl, cycloalkyl, or aryl having from 1 to 7 carbon atoms. Z and X independently for each occurrence represent —COO, —SO3, or —OPO2OR.sub.5. R.sub.5 represents a monovalent unsubstituted or substituted alkyl, cycloalkyl, or aryl having from 1 to 6 carbon atoms.

A method is for manufacturing cellulose microfibers in which a problem of yellowing of cellulose microfibers to be obtained was solved, and cellulose microfibers. As to a method for manufacturing cellulose microfibers, cellulose fibers are added with an additive (A) consisting of at least one of a phosphorous acid and a metal phosphite and an additive (B) consisting of at least one of urea and a urea derivative, heated and washed, then fibrillated. Also, as to cellulose microfibers, the fiber width is 1 to 1000 nm, and a part of hydroxy groups of cellulose fibers is substituted with a functional group represented by a predetermined structural formula to introduce an ester of phosphorous acid.

A type of flame-retardant cellulosic fiber and a preparation method thereof are disclosed. The preparation method includes extruding the cellulosic solution through a spinneret, coagulating, stretching, and water-washing to obtain a water-washed filament, which is then treated with a flame-retardant solution, and then rinsed and dried to prepare the flame-retardant cellulosic fiber. The water-washing temperature is 90° C., the temperature of the flame-retardant solution during treatment is 60-90° C., and the rinsing temperature is 20-40° C. The flame retardant contains more than one of a group that forms a covalent bond with a hydroxy group of the cellulosic macromolecule, a group having the ability of self-crosslinking reaction, and a group that forms a hydrogen bond with a hydroxy group of the cellulosic macromolecule. The prepared flame-retardant cellulosic fiber is mainly composed of the cellulosic fiber matrix and the flame retardant dispersed in the matrix.

A type of flame-retardant cellulosic fiber and a preparation method thereof are disclosed. The preparation method includes extruding the cellulosic solution through a spinneret, coagulating, stretching, and water-washing to obtain a water-washed filament, which is then treated with a flame-retardant solution, and then rinsed and dried to prepare the flame-retardant cellulosic fiber. The water-washing temperature is ≤90° C., the temperature of the flame-retardant solution during treatment is 60-90° C., and the rinsing temperature is 20-40° C. The flame retardant contains more than one of a group that forms a covalent bond with a hydroxy group of the cellulosic macromolecule, a group having the ability of self-crosslinking reaction, and a group that forms a hydrogen bond with a hydroxy group of the cellulosic macromolecule. The prepared flame-retardant cellulosic fiber is mainly composed of the cellulosic fiber matrix and the flame retardant dispersed in the matrix.

A product having ultraviolet radiation protection and antimicrobial protection has a quantity of synthetic material, a quantity of zinc oxide particles with each particle having a surface, the quantity of zinc oxide particles in the range of 0.05 percent to 0.10 percent, and a quantity of a reactive group for modifying each surface of each zinc oxide particle, the quantity of the reactive group for incorporating the quantity of zinc oxide particles into the quantity of synthetic material prior to the quantity of synthetic material being formed into a fiber.