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Dongguan Silicone Products Factory emphasizes that the product is made of silica gel. What is the reason?

Release time:

2019-05-20 12:30

Source:

DongguanSilicone ProductsWhat is the reason why the factory emphasizes that the product is made of silica gel?
 
As we all know, from November 7 to 9, 2013, the 18th Jingzheng Guangzhou Pregnant and Infant Products Expo was held in Guangzhou Poly World Trade Expo. Among the many maternal and infant products in Dongguan silicone products factory, "silicone for food" appears frequently. Whether it is nipple series, bottle series, water cup series, bite music series, baby toothbrush, baby spoon, pacifier, etc. of major brands, they all advertise "food-grade silicone" or "pharmaceutical-grade silicone."
 
Why do manufacturers all emphasize that the product is made of silicone? How can you tell the real silicone products? Xiao Bian consulted Mr. Chen, an industry veteran in the maternal and infant products industry, and he gave several tips for the industry to distinguish between true and false silicone.
 
First: test elasticity: rubber, latex elasticity is better, silica gel is more fragile, in the selection, you can first try elasticity, if the elasticity is very good, it may be rubber;
 
Second: look at the color: rubber, latex due to the impurity content, can not do transparent color products, and silica gel is colorless and transparent, to do transparent silicone rubber products must be made of silica gel raw materials
 
Third: smell: rubber, latex products smell strong, smell a smell will smell pungent smell, some manufacturers in order to cover up the smell and increase the fragrance, so the choice of silicone material raw materials will be much better.
 
Finally, silica gel because the production process itself is more complex, so the price will not be particularly low, so do not think that the purchase of cheap and buy low-priced silicone products. So, dear friends, see here is not a silicone products to know more about it?
Take you out of the fog is the main component of our meaning silica gel is silica, silica gel raw materials can also be called mold silicone rubber, pad printing silica gel, hand silica gel, etc. The main raw materials for the production of silica gel have different classification methods, mainly the following:
 
1. Silica gel raw materials can be divided into ordinary silica gel and meteorological silica gel, also known as precipitated silica gel, according to their performance. Color: translucent, Milky White, light yellow, gray, etc. Hardness: 30 °,40 °,50 °,60 °,70 °,80 °, etc., commonly used between 40 °- 70 °. Density: 1.1-1.12g/cm2 Elongation: 400 Usage: More used are low-grade silicone products such as mobile phone keys, miscellaneous parts, conductive adhesive, etc. Meteorological silica gel is also known as pure silica gel color: transparent. Hardness: 30 °,40 °,50 °,60 °,70 °,80 °, etc., commonly used between 40 °- 60 °. Density: 1.1-1.12g/cm2 Elongation: 600-700% Features: Due to the good transparency and strong tensile strength of this material. The cost is high. Uses: silicone tube, protective sleeve and other high-grade products need high elasticity.
2. Silica gel raw materials can be divided into solid silica gel and liquid silica gel according to their physical properties. Solid silica gel is mainly used for molding products. For example: silicone sleeve, silicone tableware, silicone keys and so on liquid silicone is mainly used for extrusion molding products, such as silicone nipple, silicone tube and so on.
 
3. Silicone raw materials can be divided into domestic materials and imported materials according to their sources. Domestic materials are mainly: Dongjue, Ruiying, Hongda, Tianyu, New Oriental, polymerization and other larger manufacturers. Imports are mainly: Japan's Shin-Vietnam, Toshiba, U.S. Dow Corning, France's Rodia, Germany's Wacker and so on.
 
Silica gel (Silica gel; Silica) alias: Silica gel is a highly active adsorption material, is an amorphous substance, its chemical formula is mSiO2 · nH2O; in addition to strong alkali, hydrofluoric acid does not react with any substance, insoluble in water and any solvent, non-toxic and tasteless, stable chemical properties.
 
Various types of silica gel have different microporous structures due to their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many other similar materials that are difficult to replace: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. Silica gel according to its pore size is divided into: macroporous silica gel, coarse pore silica gel, type B silica gel, fine pore silica gel, etc.
 
Eye view, hand touch method, eye view can make a general judgment through color and gloss. Silica gel is bright in color and soft in gloss. Even if it is a smooth product in time, it will not be too reflective and the reflective effect is soft. After a general judgment, this is made. Then through the hand touch, with the hand to touch, silicone products have a certain willfulness, so the hand feels softer, a little soft feeling, of course, this knowledge is relatively speaking, not absolute.
 
combustion contrast method
Take a lighter, ignite the silica gel sample and watch its burning phenomenon.
 
1. If it is added with silica gel material, then the edge of the burning is black, no matter what color the true silica gel is, then the edge is white, and the burning residue is pressed by hand, it is some white powder.
 
2. Fake silica gel burning flame, black smoke, smell; true silica gel burning flame into charcoal, white smoke, no smell.
 
Professional testing method The first two methods are suitable for mass consumers, while for large-value buyers, professional testing methods are generally adopted. Here, we will not make more introductions. We will find a professional material testing company to test the corresponding structure, chemical substances, etc.

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