摘要:
The invention relates to a vapor grown carbon fiber having a mean fiber diameter of 80 to 500 nm, an aspect ratio of 100 to 200 and preferably a bulk density of 0.02 g/cm3 or less, wherein filaments having a diameter within ±20% of the mean fiber diameter occupies 65% (on a number basis) or more of the total. The production method involves thermal decomposition of a carbon source at 800 to 1,300° C. in the presence of, as a catalyst, a transition metal compound having a vapor pressure of 0.13 kPa (1 mmHg) or more at 150° C. and spraying of the carbon source and the transition metal compound in gas form toward the reactor inner wall to allow reaction to proceed. The vapor grown carbon fiber having a larger aspect ratio has excellent dispersibility, and when added in a resin, a smaller amount contributes to enhancement in electroconductivity and thermal conductivity, as compared with a case using conventional one.
摘要:
A method of producing a piping component seal member 22 having excellent chlorine resistance includes a first step and a second step. The first step includes oxidizing first carbon nanofibers produced by a vapor growth method to obtain surface-oxidized second carbon nanofibers. The second step includes mixing carbon black having an average particle diameter of 50 nm to 10 micrometers and the second carbon nanofibers into an ethylene-propylene rubber, and dispersing the carbon black and the second carbon nanofibers in the ethylene-propylene rubber by applying a shear force.
摘要:
The present application relates to a method of treating a fabric article so that it has a characteristic smell normally associated with garments that have been exposed to natural sunlight, the method comprising positioning a fabric article (1) to be treated in an enclosure (8) and irradiating said fabric article positioned in said enclosure with ultraviolet light with a wavelength of between 280 nm and 400 nm and so that it is subjected to a predetermined radiant exposure. A device for treating a fabric article to replicate the characteristic effect of exposing said fabric article to natural sunlight is also disclosed.
摘要:
There is disclosed a method of producing a pre-oxidation fiber in the production of the pre-oxidation fiber by subjecting a polyacrylic precursor fiber to pre-oxidation processing in an oxidizing atmosphere, including shrinking the precursor fiber as a pretreatment of pre-oxidation at a load of 0.58 g/tex or less in the temperature range of 220 to 260°C under conditions in which the degree of cyclization (I 1620 /I 2240 ) of the precursor fiber measured by a Fourier transform infrared spectrophotometer (FT-IR) does not exceed 7%, initially-drawing the precursor fiber at a load of 2.7 to 3.5 g/tex in an oxidizing atmosphere at 230 to 260°C in the ranges of the degree of cyclization of not exceeding 27% and of the density of not exceeding 1.2 g/cm 3 , and then subjecting the pre-oxidation fiber to pre-oxidation treatment. A carbon fiber of high strength and high elasticity that is appropriate for composite materials that exhibit high composite performance is obtained by continuously subjecting this pre-oxidation fiber to carbonization treatment.
摘要:
The invention concerns a method for oxidising a textile mass, in particular woollen, to modify the surface of the fibres whereof it is formed, essentially consisting in: a) transforming said textile mass into a textile mass containing 12.5 to 60 % (g/g) of water and having a structure such that a gas can pass through it uniformly and thoroughly; and b) passing through said mass, for 5 to 20 minutes at room temperature, a gas mixture containing 20 to 150 g of ozone per m3, which is continuously injected through said mass while it moves along on a carrier system, being alternately directed on both surfaces of said pass. Said treatment is preferably carried out in a sealed chamber, the ozone being destroyed in output.
摘要:
The present invention relates to provision of a textile product having a naturally faded appearance. A damage processing method for a textile product includes: irradiating a surface of the textile product with a laser beam (S1); washing the textile product irradiated with the laser beam with a phosphoric acid aqueous solution (S5); and exposing the washed textile product to ozone gas (S7) .