5results about How to "Large liquid absorption" patented technology

The invention relates to a preparation process of a composite core body, which comprises the steps of first absorption layer forming, primary glue spraying, second core body forming, secondary glue spraying, second absorption layer forming and core body main body forming, the middle part of the top of the second core body is fixed only through a dotted second glue spraying part, and the two sides of the top of the second core body are not fixed by glue. When the top of the second core body absorbs a large amount of urine, the second core body can expand, and the flow guide groove provides enough expansion space for the second glue spraying part, so that the stripping force of the absorption core body is large, and the liquid absorption space of the second core body can be instantly increased; the first glue spraying part adopts the point-shaped first glue spraying points, so that the bottom of the second core body can expand after absorbing water, the whole second core body has a good expansion effect, the water locking and water absorbing capacity of the second core body is greatly improved, and the technical problems that the expansion space of the core body is limited, and the flow guiding and liquid absorbing effects are poor are solved.

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 utility model relates to the technical field of dressings, in particular to a medical gauze dressing. The medical gauze dressing comprises an upper layer, a bottom layer and a middle layer arranged between the upper layer and the bottom layer, the upper layer and the bottom layer are made of gauze, and the middle layer is made of spunlace non-woven fabric; and the middle layer is formed by superposing a single layer of spunlace non-woven fabrics or a plurality of layers of spunlace non-woven fabrics. According to the medical gauze dressing, the structure and materials of an existing product are improved, the use amount of gauze is reduced, the product manufacturing period is shortened, cost is reduced, the liquid absorption amount is increased, the upper layer and the bottom layer are made of gauze, the middle layer is made of spunlace non-woven fabric, the advantages of roughness, toughness, good air permeability and fast liquid absorption of the gauze are reserved, and the medical gauze dressing is suitable for being used for medical application. Meanwhile, the spunlace non-woven fabric is combined, so that the liquid absorption amount of the dressing is increased, the use of gauze is reduced, the product cost and carbon emission are reduced, the dual-carbon development target is met, and the use habits of doctors are met.

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.

The invention discloses a composite negative electrode, a lithium battery and a preparation method thereof, the composite negative electrode comprises a negative electrode current collector, a first active layer and a second active layer, the first active layer comprises a first graphite material; the second active layer comprises a second graphite material and a silicon material; 3.3 < = height-to-width ratio gamma1 * volume median particle diameter D150 < = 7.5 of the first graphite material; the height-width ratio of the second graphite material is gamma2, the volume median particle size of the second graphite material is D250, the volume median particle size of the silicon material is D350, mu = D350 / D250, alpha = (mass of the second graphite material / mass of the total active material) / (mass of the silicon material / mass of the total active material), and 0.3 < = mu * gamma2 * alpha < = 6. According to the invention, the cycle performance and fast charge performance of the lithium battery are ensured while the energy density is improved.