2results about How to "Large liquid absorption" patented technology

The application provides a mask base cloth and a preparation method and application thereof, and the preparation method comprises the following steps: a first mixed fiber comprises a combination of fine denier viscose fibers and modal fibers, which is subjected to opening, double-carding and laying, to obtain a skin-felt fiber web layer; a second mixed fiber comprises a combination of vinylon fibers and seaweed fibers, which is subjected to opening, double-carding and laying, to obtain a micro-elastic web layer; the skin-felt fiber web layer and the micro-elastic web layer are stacked and then subjected to water jet entanglement, and the obtained semi-finished product is dried to obtain the mask base cloth. Through the design of fiber types and the compounding of the fiber types with a double carding machine, a specific double-layer structure is obtained, and the water jet process is combined, so that the mask base cloth has a specific microporous structure, cavitation effect and energy loss are avoided, the mask base cloth has excellent skin feeling, high air permeability, excellent liquid absorption and retention capacity, mechanical properties and acoustic properties, can be highly matched with ultrasonic beauty equipment, and can play a lifting and tightening effect.

The invention belongs to the technical field of fracturing temporary plugging balls, and particularly relates to a shale gas fracturing temporary plugging ball size and use amount calculation method, which comprises the following steps: A1, acquiring geological information of a shale gas reservoir, and calculating the number n of fractures and the fracture design length L1. I (i = 1, 2,..., n) according to the geological information of the shale gas reservoir; a2, a target layer section is packed through a packer, perforation is conducted according to the preset fracture orientation and the number of fractures in the designed layer section, and the initial area S1. I (i = 1, 2,..., n) of a shot hole is calculated; a3, high-pressure fracturing liquid is pumped into the target layer section, the corresponding shot hole area S2. I (i = 1, 2,..., n) and the shot hole diameter d2. I (i = 1, 2,..., n) are obtained, and the shot hole area increment Si is calculated; and carrying out temporary plugging fracturing according to the calculation result until the extension condition of each fracture meets the design target, thereby improving the non-uniform extension condition of the shale gas hydraulic fracturing fracture and realizing accurate and efficient transformation of the shale gas reservoir.