32results about How to "Suitable for industrial production promotion" patented technology

The invention is a preparation method of polyurethane fiber with high modulus and high elasticity. In this method, firstly, acrylonitrile polymer is dissolved in an organic solvent to form a uniform and stable solution; then it is mixed and matured with a polyurethane solution to obtain a spinning stock solution; the spinning stock solution is evaporated in a high-temperature tunnel to remove the organic solvent to form a primary fiber , and then through false twisting, drafting, oiling, winding, and finally get spandex finished product. The spandex prepared by the present invention has the characteristics of high modulus, good resilience, and high elasticity retention rate; the spandex has smooth unwinding and low end-breakage rate during the use of high-speed empty bag and circular knitting, and can effectively improve the yarn quality. And the production efficiency of fabrics; the woven fabric samples are flat and uniform, with excellent elasticity, and can still maintain the original performance after processing such as setting and dyeing.

The invention discloses a benzomelamine-modified amino resin, which comprises the following components: 105 parts of liquid formaldehyde with a mass concentration of 37%, 22.5 parts of melamine with a mass concentration of 99.8%, and 3 parts of benzotriamine , 110 parts of methanol with a mass concentration of 90%-92%, 64 parts of methanol with a mass concentration of 98%, and 30 parts of reclaimed light methanol water with a mass concentration of 20%. This reclaimed light methanol water contains formaldehyde with a mass fraction of 10%. 2-13 parts of 36% hydrochloric acid, 3-18 parts of liquid caustic soda with a mass concentration of 30%; the benzomelamine modified amino resin of the present invention introduces benzotriamine, which reduces the overall molecular polarity and the solubility with organic solvents Increased, the miscibility with the matrix resin has been greatly improved, and the gloss, alkali resistance, water resistance, and heat resistance are all more advantageous than those of the prior art. It also has excellent electrophoretic advancement and excellent coating film Chemical resistance.

The invention relates to a mullite raw material adopting alumina-chrome slag as a main ingredient and a preparation method thereof. According to the technical scheme, the method comprises the steps that the alumina-chrome slag is placed into a muffle furnace, and calcination is performed under the temperature of 700-750 DEG C for 3-5 h to obtain calcined alumina-chrome slag; the calcined alumina-chrome slag, silica powder and aluminite powder are mixed on the basis that the mass ratio of the calcined alumina-chrome slag to the silica powder to the aluminite powder is 100:(16.0-16.5):(2.0-4.5) for 15-20 min, and a mixed material is obtained; the mixed material is placed into an electromagnetic induction furnace, the temperature is increased to 1,800-1,840 DEG C and kept constant for 2-3 h; then, an upper scum layer is separated out, furnace cooling is performed to the room temperature, and crushing is performed to obtain the synthesis mullite raw material adopting the alumina-chrome slag as the main ingredient. The alumina-chrome slag contains main chemical components: 80-85 wt% of Al2O3, 10-15 wt% of Cr2O3 and not larger than 1 wt% of Fe2O3. The technology is simple, the production cost is low, and no special requirement for equipment is needed; the prepared mullite raw material adopting the alumina-chrome slag as the main ingredient is high in refractoriness, good in sintering performance and high in mullite conversion rate.

The invention discloses a preparation method and application of a corrosion-resistant super-hydrophobic stainless steel mesh. The oil-water separation mesh uses stainless steel mesh as a base material, and adopts a resin bonding method to firmly bond modified fly ash to the base On the material skeleton, corrosion-resistant super-hydrophobic stainless steel mesh is obtained after curing. The corrosion-resistant stainless steel mesh of the present invention still maintains high superhydrophobic durability after 100 wear tests. The corrosion-resistant stainless steel mesh of the present invention can be applied in the fields of separation of oil / water mixture and treatment of oily wastewater, and continuous oil-water separation can be realized by building a device, the treatment capacity of oil-water mixture is large, the operation is simple, and the separation effect is good. The corrosion-resistant oil-water separation stainless steel mesh of the present invention has a simple preparation process, the whole production cycle is as low as 5 hours, and the preparation raw materials are cheap and easy to obtain, and the environment is friendly, which is convenient for industrial large-scale batch production, and has high economic benefits and practical value.