4results about How to "Guaranteed continuous performance" patented technology

The invention relates to the technical field of high polymer materials, in particular to a low-warpage halogen-free flame-retardant PBT (polybutylene terephthalate) material and a preparation method thereof. According to the invention, the flame-retardant siloxane and the gamma-mercaptopropyltrimethoxysilane are added to modify the low-warpage glass fiber, so that the composite low-warpage glass fiber is obtained. The halogen-free flame retardant is obtained by adding phosphonitrilic chloride trimer, triethylamine, aminopyrazine and acrylamide. Stirring and mixing the PBT resin, the composite low-warpage glass fiber, the inorganic fiber, the halogen-free flame retardant, the thermal initiator azodiisobutyronitrile, the solvent tetrahydrofuran and other raw materials, carrying out stirring reaction, heating to remove the solvent, and carrying out extrusion granulation to obtain a finished product. The finished product prepared by the invention has excellent flame retardance and warping resistance, so that the finished product has a wide application prospect in the technical field of high polymer materials.

The invention relates to the field of additives, and discloses a probiotic fermented feed additive for replacing antibiotics to improve the milk yield of dairy cows, and the probiotic fermented feed additive comprises 70-95% of a symbiotic fermentation substrate. 1% to 10% of saccharomyces cerevisiae; 1% to 10% of lactobacillus plantarum; 1% to 5% of bacillus subtilis; 1% to 5% of propionibacterium propionate; the symbiotic fermentation substrate comprises trehalose, glycerol, bacterial exopolysaccharide and organic acid; mycose derived from the symbiotic fermentation substrate is physiologically enriched in cytoplasm of the lactobacillus plantarum, the organic acid in the symbiotic fermentation substrate comprises propionic acid and lactic acid, and the weight ratio of the propionic acid to the lactic acid is between 1.1: 1 and 5: 1. The additive is used for cow breeding instead of antibiotics, the problems of food safety risks and bacterial drug resistance caused by antibiotic residues are radically eradicated, and meanwhile, multiple probiotics such as saccharomyces cerevisiae and lactobacillus plantarum are scientifically proportioned and have a synergistic effect with a symbiotic fermentation substrate.

This invention relates to the field of injectable hydrogel dressings, specifically disclosing a porous microsphere-reinforced injectable in-situ molded hydrogel dressing and its preparation method. The dressing includes a porous microsphere component and a photocrosslinkable hydrogel matrix component. The porous microsphere component serves as a reinforcing filler dispersed within the photocrosslinkable hydrogel matrix component. A precursor solution of the photocrosslinkable hydrogel matrix component permeates into the pores of the porous microsphere component, forming a mechanically anchored structure after in-situ photocrosslinking and curing. It also includes a natural antibacterial and healing-promoting component, fenugreek oil, with a mass fraction of 3%-8%. The porous microsphere component has a compressive modulus of 150-300 kPa, and its modulus retention rate is not less than 89% after 10 compression cycles. This design balances the convenience of injectability with reliable mechanical support, endowing the hydrogel with sustained healing-promoting activity.

This utility model discloses a corrosion-resistant steel structure protection device for energy-saving buildings, relating to the field of steel structure protection technology. It includes a first steel component and a second steel component connected to each other. A protective assembly is provided at the connection between the first and second steel components. The protective assembly includes a sleeve slidably fitted onto the first and second steel components. Both ends of the sleeve have openings adapted to the first and second steel components. A sealing gasket is provided inside the opening. The sealing gasket is elastic, and its elasticity seals the gap between the opening and the outer walls of the first and second steel components. This utility model features a multi-seal design, namely a sealing gasket and a sealing ring, effectively preventing rainwater from entering the steel structure connection gaps, avoiding corrosion of the steel structure due to rainwater erosion, significantly extending the building's service life, and ensuring the safety and stability of the building structure.