55results about How to "Initial modulus reduction" patented technology

The invention provides a Ti-Nb-Mo-Sn near-beta titanium alloy with low elastic modulus and high strength. The alloy comprises the following chemical components in percentage by weight: 15-35% of niobium, 1-8% of molybdenum, 1-8% of stannum and 0-1.2% of titanium dioxide powder. The Ti-Nb-Mo-Sn near-beta titanium alloy with low elastic modulus and high strength has the beneficial effects that the systemic alloy has good cold machining performance and a low machining cementation index and can coldly deform in a large scale by using cold machining processes such as cold rolling, cold wire drawing and the like; the systemic alloy has the characteristic of nonlinear deformation after being thermally machined or coldly machined and has large restorable elastic strain, low initial modulus and average modulus and high strength; the systemic alloy has low elastic modulus, high yield strength and breaking strength and high linear elasticity after being smelted, thermally machined or coldly machined and thermally treated; and the systemic alloy can be used for preparing medical equipment, physical training equipment and industrial equipment, and can be used for biomedical applications such as artificial bones, bone joints, implanted tooth roots, bony plates and the like.

A bamboo charcoal polylactic acid particle spinning system comprises a stirring tank, a granulating screw extruder, a first stock bin, a second stock bin, a spinning screw extruder and a spinning box. A discharge port of the stirring tank is connected with a feed port of the granulating screw extruder, a discharge port of the granulating screw extruder is connected with a feed port of the first stock bin, a discharge port of the second stock bin is connected with a feed port of the spinning screw extruder through a main discharge pipe, a discharge port of the first stock bin is connected with the main discharge pipe through a material mixing pipe, the material mixing pipe is provided with a micro meter, a discharge port of the spinning screw extruder is connected with the spinning box through a melt pipeline, and the melt pipeline is sequentially provided with a filtering and impurity removing device and a dynamic-static-integrated pipeline type material mixing device in the flowing direction of melt. According to the bamboo charcoal polylactic acid particle spinning system, polylactic acid is modified by adopting nano-scale bamboo fragrance carbon micro powder, and therefore prepared fibers have the advantages that the initial modulus is decreased, the moisture regain is increased, the wear resistance is improved, and the air permeability and the handfeel are significantly improved.

The invention provides a production process for polylactic acid bamboo charcoal slices. The production process includes the following steps that 1, lactide and bamboo incense charcoal micro-powder are added to a stirring tank to be stirred; 2, a mixture of lactide and the bamboo incense charcoal micro-powder drops in a preliminary polymerization tank through a first pipeline to be preliminarily polymerized; 3, polylactic acid bamboo charcoal melt drops in a final polymerization tank through a second pipeline to be finally polymerized; 4, a third valve at the bottom of the final polymerization tank is switched on, the polylactic acid bamboo charcoal melt is extruded out of a spinneret plate and metered through a third metering pump, and the polylactic acid bamboo charcoal melt is cooled through water; 5, the polylactic acid bamboo charcoal melt is cooled through the water, solidified to normal temperature and then sliced. Polylactic acid is modified through the nano-scale bamboo incense charcoal micro-powder, the initial modulus of fibers produced through the production process is reduced, the moisture regain is increased, abrasion resistance is improved, and the breathability and hand feeling of the fibers are obviously improved.