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What is the difference between precipitated silica gel and gas phase silica gel?

Release time:

2020-03-14 15:10

Source:

Do you know the difference between precipitated silica gel and gas phase silica gel?
 
Silica gel raw materials according to its performance, can be divided into two kinds of precipitated silica gel and gas phase silica gel. Well, in productionSilicone ProductsHow to separate the raw materials used is precipitated silica gel or gas phase silica gel? What are their different characteristics?
          
Today, Xiao Bian took everyone to learn how to distinguishWhat is the difference between precipitated silica gel and gas phase silica gel.
 
The use of silica gel is the need to confirm in advance what kind of material it belongs to in order to carry out the next step of processing, why do you say that? Because in the case of do not know and the random use of materials for the production of silicone products, may be because of its material characteristics or performance, making this silicone products may appear to varying degrees of performance deviation. So for the identification of silicone material is very important.
 
The material of silica gel is divided into many types, and what we are going to explore today is two types of precipitated silica gel and gas phase silica gel. So, how should we distinguish between precipitated silica gel and gas phase silica gel?
 
Precipitation type silica gel, also known as: ordinary silica gel. The appearance is generally granular, the color is mainly opaque or translucent, the tensile strength is 4Mpa ~ 6.9Mpa, and the elongation is 150~300.
          
The silicone product after vulcanization molding will have obvious whitening phenomenon when stretching, and can not be pulled very long. This is the precipitated silica gel, silica gel production of this material is the use of sodium silicate after adding sulfuric acid to the silica precipitated out, the cost is relatively low, but the amount is large, generally used for industrial silica gel tube.
 
Gas phase silica gel, alias is also called: pure silica gel. The appearance is highly transparent, the tensile strength is 7.8Mpa ~ 10.0Mpa, the elongation can reach 500~1000, and the tear strength is 29.4-49KN/m. The product after vulcanization molding will not whiten when stretched, and it will not turn white when pulled, and it can be pulled very long.
 
This is a gas-phase silica gel, silica gel production of this material is made of silicon tetrachloride and silica obtained after air combustion, mainly used for food grade, medical grade and other special requirements of the silicone tube.
 
Because the gas-phase silica gel is higher than the production cost of precipitated silica gel, and the same hardness of the gas-phase silica gel tensile tear, elongation, etc. are better than precipitated silica gel, while the environmental protection index is higher.
           
Therefore, gas-phase silica gel is generally used in industries with relatively high requirements, while precipitated silica gel is used in industries with relatively low requirements.
 
The above is the whole content of the article, now you know aboutWhat is the difference between precipitated silica gel and gas phase silica gel?
 
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What is the difference between silicone plug and rubber plug

Silicone plug and rubber plug which one effect is good? Then today we will popularize their difference to where the end point is. First of all, rubber plug products, as a common type of industrial products and accessories, or have strong advantages, such as dust and water resistance, wear resistance, tear resistance, aging resistance, oil seal resistance and ozone radiation resistance, etc., while rubber materials are divided into various types, and the side materials over there can be made of dozens of compound materials, so different attribute functions can be deployed for different needs, as for some industries such as mechanical tight closure, electronic tight closure, vehicle construction and even aerospace and military industry, rubber blocking is the most suitable. Silicone rubber plug and rubber plug have one thing in common. They can be molded in the molding vulcanizer of silicone product manufacturers. The difference is that they are more environmentally friendly, have good high and low temperature resistance, feel better when touching by color hands, and can be in contact with human body skin for a long time. Therefore, silicone plugs for earphones and medical grade silicone plugs are widely used even in food silicone appliances, mainly or because of the material in particular the nature of the achievements of its scope of application. Silicone plug is different. Its material is mainly based on environmental protection advantages, material texture and comfortable application. Therefore, it is used in some electronic products, survival products and small-scale waterproof and dustproof household appliances. Its raw materials are mixed by precipitation method silica gel, high-fine molecular silicone gum and white carbon black. The molecular chain of the product is called heart, soft and comfortable to use! Compared with the materials of silica gel and rubber, they can be compared as follows: new technologies are used in traditional industries. Rubber materials have been heard for a long time in early years, so the comparison of rubber materials accounts for the majority. Up to now, more and more silicone rubber products have been reused because they can replace larger usage compared with rubber, namely environmental protection performance and various technologies, such as shape, pattern and color, etc. www.mingzhen2006.com

What are the fields of application of silicone keys for equipment

Characteristics and uses of silica gel Silicone is a kind of rubber. The vulcanized silicone rubber has heat resistance, cold resistance, ozone resistance, atmospheric aging resistance and good electrical insulation properties. The disadvantage of silicone rubber is that the tensile strength and elongation at break are small, and the compression deformation is large. Suitable for making parts used in high temperature, low temperature, sunlight, atmosphere, ozone environment and electrical insulation parts. Dimensional accuracy and recommend marking tolerance Trajectory material is an elastomer, compared to the plastic material, the direct impact of the shrinkage rate of many and complex factors, precision than plastic parts more difficult to do accurate, in the specific design should be fully considered, there should be no high precision. If the basic size is too large to meet the dimensional accuracy required by the design, it can be solved by the method of deformation of the positioning column with the substrate. Where dimensional accuracy is required, there must be room for convenient mold repair in the design. Etched text and patterns Silicone substrate can be designed out of the trademark pattern and text, in the molding products at the same time molding out. The group and text on the products are convex and concave two types, considering the convenience of mold processing, are generally designed as convex. In order to facilitate the replacement of marks or models, the marked parts can be designed as inserts during mold design. When the product model changes, only the marked parts in the mold cavity can be replaced to meet the needs of mark replacement. As part of this type of article, it should be designed to allow the presence of flash debris at the contour of the insert tile at the marked location. For conductive rubber, the stroke is generally 0.8~1.5mm; the exhaust groove (I. e. gas pit) is designed to prevent adsorption between the PCB and the key action. For tact switches, the stroke depends on the stroke of the switch itself (and the stroke for preventing misoperation), as described later. If the substrate is not bonded to the PCB board, the structural element of the air slot can be omitted. The key design has a hand feeling problem. Different graphs correspond to different hand feelings. According to experience, when (FP-FC)/FP is 40%-60%, the hand feeling is better. Key Typical Structure and Application According to the specific occasions where the keys are used, as well as the specific requirements of the product for the service life, pressing force, and hand feeling of the keys, the structure and application of the keys are shown in the following figure. The life of the silicone key is directly related to the material and the inclined wall structure, and is determined according to the design requirements. Part of the product silicone key life reference: Remote controller: 500000 times; Telephone type: 1 million times; Laptop computers: 4 million to 5 million times; Computer keyboard: 500~10 million; The life of silicone keys for monitoring products is defined as more than 500000 times; The ordinary life of B super silicone keys is defined as more than 1 million times,

The convenience of the use of industrial silicone buttons

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What are the molding techniques of rubber products?

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How to print the pattern on the transparent key

Some laser marking machines have played opaque keys. While using laser typing to knock out the paint, they will also burn the plastic parts that can transmit light, but cannot transmit light! Changzhou laser marking machine has a special device, which can adjust the machine to the function of laser processing light-transmitting key. The laser can clean the paint sprayed on the surface very clean without burning light-transmitting plastic, thus realizing light-transmitting key laser processing! YAG laser marking machine, the general laser marking machine can not do through the key! Light transmission keys, also called light transmission buttons, are widely used in electronic products. In dark environments, they can accurately and accurately find each button. The light transmission keys include a light transmission key body, an electronic switch located below the key body, and a luminous body. The luminous body is arranged on the lower side of the key body. A light guide body is arranged below the key body, and the light guide body has a body, the upper side of the body extends an extension to the position where the electronic switch is located, the outer surface of the extension is a first reflective slope, the lower surface of the body is a second reflective slope and doubles as a light touch surface that can be contacted with the electronic switch, and a light input part connected with the extension part and arranged corresponding to the light emitting body, the light emitting body emits light, the light is emitted to the first reflective slope through the introduction portion, and is reflected by the first reflective slope into the body, and the light entering the body is reflected by the second reflective slope out of the key body. The structure makes the light emitted from the light emitting surface of the key body more uniform, the key is more beautiful, and the user can accurately find the corresponding function key. The pattern and text on the keys are processed by laser typing! In our life, there are many keys and buttons that use laser typing and can transmit light, such as mobile phone keys, car audio keys, computer keys, and various electronic and electrical keys! www.mingzhen2006.com