62results about How to "Strong inertia" patented technology

The invention belongs to the technical field of medical polymers, and discloses a low-particle precipitation medical polypropylene material as well as application and a preparation method thereof. The low-particle precipitation medical polypropylene material is prepared from the following components in parts by mass: 50-80 parts of polypropylene, 1-5 parts of low-molecular weight polyolefin wax, 10-35 parts of vinyl elastomer, 5-15 parts of auxiliary crosslinked elastomer, 0.005-0.05 part of modifying peroxide and 0.01-0.5 part of an antioxidant. The preparation method comprises the following steps: uniformly mixing the polypropylene, the vinyl elastomer, the auxiliary crosslinked elastomer and the antioxidant, adding into an extruder, melting and kneading at 150-200 DEG C, uniformly mixing and dispersing the modifying peroxide and the low-molecular weight polyolefin wax, adding into the extruder, continuously extruding, cooling, and pelletizing to obtain the medical polypropylene material. The preparation method can be used for preparing combined covers for large infusion packages, medical sanitary equipment or medicine storage containers.

The invention discloses dual-purpose cemented sand used for oilfield development and aims at providing the dual-purpose cemented sand which cements and solidifies under the water bath environment, improves the ultimate recovery of the oil well, has good effects of sand prevention, leak stoppage, water plugging and profile control and effectively protects the oil layer. The dual-purpose cemented sand contains the following components according to percentages by weight of 60-80 percent of mixing chamotte of sulphoaluminate and ferrous aluminate, 10-20 percent of sintering porcelain granules and10-20 percent of quartz sand. The dual-purpose cemented sand belongs to inorganic material, has strong inertia, stable performance, no harms to the human body, no pollution to the environment, low cost and can effectively protect the oil layer. As the dual-purpose cemented sand has the adsorptivity and the cementation and solidification performance among granules in the water bath environment, after entering into the stratum, the dual-purpose cemented sand cements and solidifies to form an artificial borehole wall under the water bath environment, thereby being capable of satisfying the cementing strength and the permeability required during the production. When the dual-purpose cemented sand is used for the measures of sand prevention, leak stoppage, water plugging and profile control, and the like, the construction process is simple, the construction period is short, the construction cost is low, the measure effect is good and the validity period is long.