The so-called pharmaceutical intermediates are actually some chemical raw materials or chemical products used in the pharmaceutical synthesis process. This chemical product does not require a production license for medicines, and can be produced in ordinary chemical plants. As long as it reaches a certain level, it can be used for the synthesis of medicines.
Explanation: Some chemicals used in drug synthesis Anti-Influenza Drugs,Api Oseltamivir Phosphate,Intermediate For Oseltamivir Phosphate,Vortioxetine Hydrobromide Intermediate Jinan Prosperity International Trade Co. Ltd , https://www.jnprosperity.com
The laser engraving machine is the most commonly used engraving equipment. The engraving effect has the characteristics of uniform color, clear pattern and durability. It is often used for wood engraving and plywood engraving. But different materials have their own characteristics, and these characteristics often use different laser engraving methods.
For carving different materials, the first thing to study is the characteristics of these materials to select laser engraving machines of different powers. First of all, for wood, although wood is the most commonly used material, it is generally easy to engrave. Just grasp the hardness of the wood and adjust it. However, the two-color board is selected according to the material. The two-color board is an engineering plastic composed of a composite structure of two or more colors. It is usually used to mark signs and badges. If the surface is very thin, It is necessary to take a small piece of debugging first. The key to plywood engraving is to look at the kind of wood. The carved wood will have a burning sensation, and the depth of its color depends mainly on the laser power and engraving speed.
Laser engraving machines often carry out rugged engraving verses, pictures, figures and other graphics in metal, wood, glass and other products according to different needs of users. This is also the reason for the wide application of laser engraving equipment.
Laser engraving machine engraving is the main means of wood engraving. The intensity of the beam can cause the engraved letters to be darker in color. The wood used for laser engraving is: walnut, cherry, oak, maple, birch, and poplar. Different woods have different engraving effects. Some woods, such as walnut, are easy to cut and smooth, while some are hard to find and difficult to color.
Laser engraving is used for the engraving of light-colored wood, so that the engraving area will be stronger than the unengraved color. Here are some of the requirements for wood in laser engraving:
1. In general, the greater the depth of engraving, the darker the color. Chengdu laser cutting
2. With low frequencies, such as 250dpi or 300dpi, you can create better results. This strength can be used to carve good results, especially for soft wood.
Advantages of laser engraving machine:
Generally speaking, the processing of hard materials is a very broad concept. Cutting, marking, flat carving (two-dimensional) relief (three-dimensional) of the plate, etc., according to its processing principle, the engraving machine can be divided into mechanical engraving machine, laser engraving machine, sandblasting machine, waterjet cutting machine, etc., but The carvings of handicrafts can be cut through at least at the current stage. Currently the most used mechanical engraving machine, laser engraving machine and sandblasting.
One is that laser engraving/marking is non-contact with the data so there is no tool loss for radical engraving. This also reduces potential substandard products. The laser-marked logo lasts for a long time, and the laser has many advantages over traditional processing methods. And simple and clear. Although it sometimes takes time and effort to find out the appropriate parameter settings, laser engraving is much faster than traditional mechanical engraving. Because the engraving principle is completely different, the laser can engrave many materials that cannot be engraved by radical engraving, including wood, rubber, and so on. In addition, the same laser engraving machine can be used to cut through not too thick plates.
After wood carving, there is generally a feeling of being burned. Matching the color of the wood has an original artistic beauty. The depth of the color depends mainly on the laser power and the engraving speed. But some woods are usually softer in texture, and you can't change their color (such as birch) anyway. For the coloring of the finished product, an acrylic pigment can be used.
Purpose: Synthesis of medicines
Features: low profitability of production intermediates
Representative: fluorine-containing pyridines, etc.
Field: Medicine