| abstract |
The present invention provides a fiber which has performance indispensable for an injection fluid in imparting proppant transport, dispersibility, and dispersion stability thereto, and which, as a hydrolysis resistance-controlled fiber quickly decomposing and dissolving in water after having functioned in high-temperature hot water for a certain period, has 50% or more of linearity two hours after being in 175℃ hot water and 20% by weight or less of a fiber-derived water-insoluble content 48 hours after being in 175℃ hot water. |