摘要:
Reinforcing fibers of plastic having a surface tension of from 40 dyn/cm to about the surface tension of water are disclosed. The fibers can be easily and uniformly disposed in matrices. For organic matrices, a surface tension of 40-50 dyn/cm is effective. For cement matrices, a surface tension about 70-75 dyn/cm is effective. The high surface tensions are obtained by a corona treatment and subsequent application of a hydrophilic avivage. Corona treatment may be performed on the fibers, or on films from which the fibers are made.
摘要:
A MANUFACTURED MATERIAL AND A PROCESS FOR MAKING THE MATERIAL IS DISCLOSED. THE MANUFACTURED MATERIAL IS A HYDROGEN CONTAINING SUBSTANCE HAVING A FLUORINATED SURFACE AND IN WHICH HYDROGEN ATOMS, WHICH MAY BE PRESENT IN HYDROXYL RADICALS ATTACHED TO A CARBON ATOM CHAIN, HAVE BEEN REPLACED IN THE SURFACE OF THE MATERIAL BY FLUORINE ATOM OR RADICALS, AND WITH SUCH FLUORINATED SURFACE OF THE MATERIAL CONTAINING AT LEAST 2 MICROGRAMS OF SUCH FLUORINE PER CM.2 OF SURFACE AREA. THE PROCESS FOR MAKING SUCH A MATERIAL INCLUDES THE STEPS OF SELECTING A SUBSTRATE CONTAINING HYDROGEN ATOMS WHICH MAY BE PRESENT IN HYDROXYL RADICALS ATTACHED TO A CARBON ATOM CHAIN, SELECTING A GAS CONTAINING FLUORINE ATOMS OR RADICALS, PLACING THE SELECTED SUBSTRATE BETWEEN ELECTRODES IN A FLOWING ATMOSPHERE OF THE SELECTED GAS AT SUBATMOSPHERIC PRESSURE, AND SUBJECTING THE SUBSTRATE TO AN ELECTRODELESS DISCHARGE OF AT LEAST ABOUT 0.2 KWH./YARD2 TO CHEMICALLY ACTIVATE BOTH THE SURFACE OF THE SUBSTRATE AND THE GAS, AND EXCHANGE THE FLUORINE ATOMS OR RADICALS FOR SURFACE HYDROGEN ATOMS OR RADICALS TO PRODUCE A MATERIAL WITH A SURFACE, WHICH COMPARED TO THE SUBSTRATE BEFORE THIS PROCESS TREATMENT, IS MORE WATER REPELLENT (WITHOUT SEALING PORES), IS MORE CORROSION AND SOIL RESISTANT, MORE CHEMICALLY INERT, AND MORE LIKE THE RELATIVELY EXPENSIVE POLYTETRAFLUOROETHYLENE. WHEN THE SUBSTRATE IS A MATERIAL HAVING A RELATIVELY INERT SURFACE. SUCH AS POLYETHYLENE, THE PROCESS IS DISCLOSED AS INCLUDING AN INITIAL TREATMENT STEP THAT INVOLVES ION BOMBARDMENT OF THE SUBSTRATE IN HELIUM GAS TO ACTIVATE THE SURFACE BEFORE THE SURFACE IS TREATED IN THE FLUORINE CONTAINING GAS.
摘要:
The invention relates to bone repair and more specifically to a berberine/mineralized collagen-based composite membrane, a preparation method, and an application thereof. The composite membrane includes a berberine nanofiber membrane and a mineralized collagen membrane disposed on a unilateral surface of the berberine nanofiber membrane. The mineralized collagen with biomimetic mineralization capacity is combined with a Chinese materia medica monomer, berberine, the resulting bilayer composite membrane has a better effect on promoting osteogenesis In addition, a novel dosage form of berberine is constructed. An electrospinning method prepares a berberine nanofiber membrane. The berberine nanofibers are received by the mineralized collagen membrane, or after the berberine nanofiber membrane is obtained, a mineralized collagen membrane is prepared by applying on the surface of the berberine nanofiber membrane.
摘要:
[Problems]An object of the present invention is to provide an electret with an initial increased electrostatic charge quantity and suppressed attenuation of electrostatic charge to liquid particles.[Means for solving]The electret is obtained by depositing polytetrafluoroethylene having a melting point of 35° C. or higher and 320° C. or lower on a carrier and imparting an electrostatic charge to at least one of the carrier and the polytetrafluoroethylene.
摘要:
The present invention provides a polyethylene fiber which can attain a high dye exhaustion rate, which indicates deep color, and which is excellent in dyeability and color fastness; a woven or knit textile that uses the polyethylene fiber, and that is excellent in cut-resistance and heat-retaining property, and a glove thereof. A polyethylene fiber of the present invention is characterized by having an intrinsic viscosity [η] of 0.8 dL/g or more and less than 5 dL/g; being composed of a repeating unit substantially derived from ethylene; having pores being formed from a surface of the fiber to an inside of the fiber; having an average diameter of the pores of ranging from 3 nm to 1 μm when the diameter is measured, by each pore being approximated by a column, at a contact angle of 140 degrees, in a mercury intrusion method; a porosity of the pores of ranging from 1.5% to 20% 1; or a thermal conductivity in a fiber axis direction at a temperature of 300 K of ranging from 6 W/mK to 50 W/mK.
摘要:
Polyoxypropylamines, polypropylene oxide polymers endcapped on one or both ends with carbamate groups, di- or tri-carboxylic acids, carboxylic acid halides, or esters or mixtures comprising one of the above with a hydrophilic polyester copolymer having repeating segments of ethylene terephthalate units containing 10-50% by weight of polyoxyethylene terephthalate units useful for imparting a durable hydrophilic coating to polyester, polypropylene, polyethylene, cotton, polyamide or polyaramid fabric or fiber are disclosed.
摘要:
Polyoxypropylamines, polypropylene oxide polymers endcapped on one or both ends with carbamate groups, di- or tri-carboxylic acids, carboxylic acid halides, or esters or mixtures comprising one of the above with a hydrophilic polyester copolymer having repeating segments of ethylene terephthalate units containing 10-50% by weight of polyoxyethylene terephthalate units useful for imparting a durable hydrophilic coating to polyester, polypropylene, polyethylene, cotton, polyamide or polyaramid fabric or fiber are disclosed.
摘要:
A modified porous non-conductor is provided wherein its outer and inner, surfaces have been treated by placing the porous non-conductor between a pair of electrodes which are located opposite to each other and carry a dielectric layer on a surface facing the other electrode, respectively, so that the porous non-conductor is brought into contact with both dielectric layers without coming into contact with the electrodes; and then, applying an alternating current voltage having a frequency of about 0.1 Khz to about 100 Khz between the electrodes to thereby induce an electric discharge in voids contained in the porous non-conductor and sandwiched between a pair of the electrodes.
摘要:
A method for producing cardable, hydrophobic polyolefin-based staple fibers by applying to spun filaments a first spin finish comprising at least one cationic antistatic agent, in particular a quaternary ammonium salt, stretching the filaments, applying to the stretched filaments a second spin finish in the form of a dispersion comprising at least one hydrophobic lubricant selected from a fatty acid amide condensation product and a hydrocarbon wax, the second spin finish optionally further comprising a polydiorganosiloxane in an amount of up to 15% by weight, and crimping, drying and cutting the filaments to obtain staple fibers; as well as textured, cardable, polyolefin-based staple fibers prepared by the method and hydrophobic nonwoven materials produced from such fibers. The fibers are able to be carded at extremely high speeds and are particularly suitable for use in the preparation of thermally bonded hydrophobic nonwoven fabrics in which a dry, water-repellant surface which can function as a liquid barrier is desired, e.g., for disposable diapers, feminine hygienic products and medical products.