Ketaili silicone products company analysis: the development of the silicone industry

Tillie silicone products company analysis: the development of the silicone industry

　　Silicone alias: silicone rubber is a kind of highly active adsorption material, amorphous materials, the chemical formula for mSiO2 · nH2O. Insoluble in water and any solvents, non-toxic tasteless, stable chemical properties, in addition to the strong alkali, hydrofluoric acid does not react with any material. Various types of silicone because of the different manufacturing methods and form different microporous structure. Chemical components and physical structure of the silica gel, determines it has many other similar materials difficult to replace features: high adsorption properties, thermal stability, chemical stability, has high mechanical strength, etc. Silica gel according to the size of the aperture is divided into: macroporous silica gel, coarse pore silica gel, b-type silica gel, silica.

　　Silica gel was mostly silica, stable chemical properties, don't burn. Silica gel is a kind of amorphous silica, should control the workshop dust content is not more than 10 mg/m3, need to be reinforced platoon wind, when wearing a mask.

　　Silica gel has a strong adsorption ability, drying effect on a person's skin, therefore, operation should be dressed in the uniform. If the silica gel into the eyes, need a lot of water flushing, and find a doctor as soon as possible.

　　Blue silica gel due to contain a small amount of cobalt chloride, toxic, and food contact should be avoided and the suction mouth, such as poisoning incidents should be looking for a doctor immediately.

　　Silica gel in use process because of the medium water vapor adsorption or other organic substances, adsorption ability, can be regenerated through repeated use. Silica gel production after gel, washing and drying the commonness, but specific to a particular type of adhesive, and process, different personality difference between each other. Gel granulation process gel granulation is one of the key steps of silica production, refers to a certain concentration of diluted bubble spent lye and dilute sulphuric acid in certain conditions fully reaction to form soluble gel solution, up to a certain concentration to form gel particles. Gel particle shape, size and so on complete mountain user requirements and process production capacity decision, pass "several gel method, has many USES air granulation, for fine granularity, considering the difficulty of granulation, the air is mostly adopts the reaction tank gel granulation, micro powder silica gel production. Gel used in acid and alkali ratio, concentration, temperature and gel time of granulation is a specific process parameters of gel granulation process.

　　Silicone technology characteristics decide the quality of the finished product glue parameters, in turn finished glue quality parameters requires a certain feature process control. Regarding the finished plastic bulk density as an example analyses the relation between the person. Bulk density is one of the important quality parameters of silica gel product analysis, intuitively Ifn simple reaction of silica gel particles physical parameters of the internal pore structure. Silica gel is a kind of porous solids, its apparent volume V u} real mountain of two parts, the first part is silica gel particles inside the actual hole, a piece of volume to V} said. The first _ part accumulation between particle pore, to V}} said. The second part is the silicone kidney have volume, Vi. Said. So V u}} - = V, a}} + V + V t, =, n, for the quality of the silica gel, a quick - = m/V} relation, '}}} + V + V I, Porgy = = (different from "a few silicone density mlVa} + Vi ', =). In our country, the hot vulcanized silicone rubber is mainly used for electronic electrical industry, office automation equipment and automotive industry, with the development of national economy, the demand for hot vulcanized silicone rubber are rising at an annual rate of no less than 20%. Hot vulcanized silicone rubber production technology is complex, high value-added products, organic silicon in the world market, its share of the sales account for about 10%, compared with 30 to 40% of sales. In developed countries, hot vulcanized silicone rubber and mixing rubber production scale and production technology has reached a higher level, early in the early 60 s in the United States Dow Corning have thousand tons continuous polymerization plant. In our country the earliest engaged in the study of hot vulcanization silicone rubber and and production units are mainly chenguang chemical industry research institute and sunup company research institute, etc., the first production plant was built in 1960, the scale of production for 5 t/a. To now, has completed the raw rubber production equipment more than 40 sets, total production capacity of nearly 80000 tons. Is widespread domestic manufacturers of silicone production efficiency is low, imperfect supporting technology, production of high-grade mixed gum problems such as less. According to incomplete statistics, in 2003 China's hot vulcanized silicone rubber production for more than 40000 tons, and the actual mixing rubber consumption in our country, nearly 100000 tons, the high quality of mixing rubber most dependent on imports. At present, the silicone rubber mixing rubber consumption more than 10% of the world's consumption, the fastest growing mixing glue application field is making conductive silicon buttons (key pads). Manufacturer focus on areas such as shenzhen, xiamen, nantong, button has become a hot vulcanized silicone rubber glue the biggest users; Silicone rubber and lightning arrester is instead of porcelain insulator, glass insulator, lightning arrester of the third generation of products, can be used in harsh climate conditions, now has a lot of it used in power transmission and transformation system overseas, has started using in the coastal developed areas in our country, the market prospect is very broad. Made of silicone sealant for car use dosage of tens of thousands of tons in our country, about 3000 tons of hot vulcanization silicone rubber, and with the improvement of vehicle class, the dosage of the silicone rubber will increase greatly; In addition, the silicone rubber in power cable, power plant, shipping, etc. The control cable, internal wiring of electronic machine, lead wire of motors, such as color TV has a good application prospect. In civil, made of hot vulcanization silicone rubber feeding bottle teats, thermos bottle plug, pressure cooker washer hose, and food vending machine has a large number of use, such as some raw rubber mixing rubber and have been exported to foreign countries, such as the morning chemical industry institute of mixed gel pacifier for several years exported to Iran, marked the silicone rubber products in China has entered the international market. Silicone rubber has very extensive and important USES, there are a lot of silicone rubber products used in modern medicine, such as used in the manufacture of silicone rubber prevent noise earplugs, silicone rubber tire head attractor, artificial blood vessels, tympanic membrane patches, artificial trachea, artificial lung, artificial bone, silicone rubber, duodenal tube and so on, the effect is very ideal.

　　Medical silica gel is cosmetic surgery is widely applied in biological materials, a variety of forms, such as: liquid silicone oil, silicone jelly samples, foamy silicone sponge and elastic solid silicone rubber, etc., the current application of silicone rubber is more solid. Silicone rubber has good biological compatibility, for human tissue, non-toxic, no allergic reaction, the body's rejection is few; Has good physical and chemical properties, contact with body fluids and tissues process can maintain its original elasticity and softness, not from degradation, is a fairly stable inert substance. Ingeneral, high temperature disinfection. Processing and molding is convenient, easy processing sculpt shape, easy to use. Silicone rubber can be divided into hot vulcanized silicone rubber and RTV silicone rubber. Type heat vulcanization silicone rubber can be made into different hardness of products, is the most commonly used one kind of clinical, can be carved in the form in advance. Such as: nasal prosthesis, artificial mandible and skull patch, breast implants, auricle or support the maxillofacial superstructure materials, artificial joints, testicular, etc. Type room temperature vulcanized silicone rubber for the silicone oil unit again, at room temperature vulcanization process, through the catalyst in the for before hardening liquid injection into the desired part, according to local defect form fill the shape. But this usage disease disease is more, have been out of service.