减速器（1T12T）

减速箱（1TR90）

Film-forming antibacterial composition special for zinc oxide dispersion slurry as well as preparation method and application of film-forming antibacterial composition

The invention provides a special film-forming antibacterial composition for zinc oxide dispersion slurry as well as a preparation method and application of the special film-forming antibacterial composition, and belongs to the technical field of cosmetics in fine chemical engineering. According to the preparation method disclosed by the invention, a certain proportion of film-forming agents such as chitosan and derivatives thereof and the hydrophobic composition are added into the zinc oxide dispersion slurry, so that the prepared zinc oxide dispersion slurry is relatively good in powder phase-liquid phase layering effect, the zinc oxide powder is uniform in state, and a formed biological film is stable in state; the antibacterial property of the chitosan is not reduced, meanwhile, good hydrophobic property can be achieved, and the antibacterial efficiency on propionibacterium acnes reaches 99.9%.

Composition, application thereof and powder phase-liquid phase double-layer product

The invention discloses a composition. The composition comprises a component I and a component II, the component I is prepared from the following raw materials: weak acid of C8-C10 and alcohol of C4-C10; the component II comprises the following raw materials: a skin conditioner A, a skin conditioner B and adenosine; wherein the skin conditioner A comprises yeast glycoprotein and a neutral or acidic compound with an amino group; and the skin conditioner B comprises a neutral or acidic compound with an amino group. The invention further provides application of the composition and a powder phase-liquid phase double-layer product. When the composition provided by the invention is added into a powder phase-liquid phase double-layer product containing zinc oxide, zinc oxide can have a relatively good settling velocity and can be quickly layered during storage; meanwhile, zinc oxide can be kept in a dispersed state without caking and gathering, and can be quickly and uniformly mixed with a liquid ...

Preparation method of copper-aluminum gradient alloy submarine cable welding joint

The invention discloses a preparation method of a copper-aluminum gradient alloy submarine cable welding joint, which comprises the following steps of: preparing copper-aluminum alloy powder with different mixing proportions by using a mechanical stirring mode, carrying out vibration densification and extrusion on powder blanks arranged according to gradients by adopting a cold isostatic pressing molding technology, preparing a copper-aluminum gradient blank through cold isostatic pressing, and carrying out heat treatment on the copper-aluminum gradient blank to obtain the copper-aluminum gradient alloy submarine cable welding joint. The copper-aluminum gradient material is prepared through equal channel angular pressing and heat treatment; according to the cold isostatic pressing and equal channel angular pressing processes adopted by the invention, the copper-aluminum ratio is controllable through pre-mechanical mixing; under the condition that the cross sectional area and the shape of ...