52results about How to "Stay hygroscopic" patented technology

The invention discloses a preparation method of a vinyl collagen microsphere / polyamide fiber composite material. The method is specifically implemented according to the following steps of 1, modifying collagen by methacrylic anhydride to obtain vinyl collagen, and emulsifying and crosslinking the vinyl collagen to obtain vinyl collagen microspheres; 2, treating a polyamide fiber base material with formaldehyde to obtain hydroxylated polyamide fiber, and treating the hydroxylated polyamide fiber with MPS to obtain sulfhydrylated polyamide fiber; and 3, modifying the sulfhydrylated polyamide fiber base material with the vinyl collagen microspheres through thiol-ene click, thereby obtaining the vinyl collagen microsphere / polyamide fiber composite material. According to the composite material prepared by the method, on the basis of ensuring certain hygroscopicity, the moisture permeability of the fiber is further improved, the additional value of the fiber material is increased, the resource utilization of leather waste collagen is realized, and the application field of the collagen microspheres is enriched.

The present invention discloses a pantoprazole sodium enteric coated tablet and a preparation method thereof. In the invention, an optimal prescription, an optimal process prescription and optimal isolation layer and enteric coating process choices are obtained by researching the prescription and production technology of the core of the pantoprazole sodium enteric coated tablet, and processes of the isolation layer and the enteric coating. The pantoprazole sodium enteric coated tablet prepared on the basis of the above optimal prescription, production technology, isolation layer and enteric coating has the advantages of good stability, good acid resistance, good release, and bioavailability improvement. The preparation method is simple and stable, and is suitable for industrial production.

The invention discloses a reactive printing paste modifier which does not need urea in application, a preparation method and a composition thereof. The invention has high printing depth, high printing uniformity and good hand feeling, and especially does not need urea in the printing color paste, thereby reducing ammonia nitrogen discharge. In the application of the present invention, the active printing paste modifier without urea comprises the following copolymerized units: R in the formula: straight chain C 10‑20 In the saturated or unsaturated aliphatic hydrocarbon group formula A), n: 7-32, m: 0-34; n+m does not exceed 40; the molar ratio of the copolymerization units represented by formula A and formula B is 1:30-150; The weight average molecular weight of the reactive printing paste modifier without urea in the application is 10 4 -10 6 .

A core-sheath composite section fiber, characterized in that the core polymer is a thermoplastic polymer, the sheath polymer is a polyamide having a dicarboxylic acid unit mainly composed of a sebacic acid unit, and the boiling water shrinkage rate is 6.0~ 12.0%, the stress per unit fineness at 3% elongation in the tensile test of the fiber is 0.60 cN / dtex or more. The present invention provides a core-sheath composite cross-sectional fiber which is excellent in hygroscopicity and wrinkle resistance, and which can maintain hygroscopicity even after washing.

The invention discloses a scorpion raising device capable of simulating natural environment. The device comprises vertical plates defining a scorpion nest, wherein ventilating holes are formed in the vertical plates, the scorpion nest is filled with filler, the filler is provided with a plurality of scorpion holes, and each scorpion hole is communicated with a ventilating hole. A moisture absorption drainage top cover is installed above the scorpion nest. The scorpion holes are communicated with the ventilating holes, so that humidity in the scorpion holes can be better dissipated, and humidity in the filler of the scorpion nest can be further dissipated through the ventilating holes in the vertical plate so as to realize the propose of ventilating and discharging humidity, so that the humidity of the whole scorpion nest meets the ecdysis and growth demands of scorpions and scorpions can stay in the ventilating holes or crawl in and out of the filler such as soil in the ventilating holes. Temperature in the scorpion nest is not manually adjusted basically, and is automatically adjusted along with natural temperatures in all seasons. The device disclosed by the invention provides a growing environment which is close to the natural environment for ecdysis and growth of scorpions, so that the ecdysis survival rate of scorpions is greatly improved, and the device is suitable for artificial breeding in a large scale.