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Dongguan Minz Rubber & Plastics Co., Ltd.

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What are the characteristics of O-rings and nitrile O-rings?

Release time:

2019-05-11 12:30

Source:

What are the characteristics of standard O-rings?What?
 
Well, the standard typeO-ringWhat are the characteristics? Its standard characteristics include speed, medium, temperature, compression, etc.
 
Technical pressure data for 1. static O-rings:
1. Speed of standard O-ring: * Reciprocating speed can reach 0.5 m/s in static occasions; * When there is no retaining ring, the pressure can reach 20mpa and the rotation speed can reach 2.0 m/s; * When there is a retaining ring, the pressure can reach 40mpa;

2. Medium and temperature of standard O-ring: when there is a special retaining ring, the pressure can reach 200mpa. See Dynamic Pressure II in "Rubber Seal Material Characteristics Table. Pressure technical data of dynamic O-ring: 1. Compression amount of standard O-ring: * When there is no retaining ring, the reciprocating motion can reach 5mpa static seal: 20 of the diameter of O-ring; * When there is a retaining ring, the higher pressure dynamic seal: 30 of the diameter of O-ring;
 
Characteristics of sealing material for O-ring
 
The performance and life of the sealing ring are determined by the sealing material. The most medium characteristics are oil resistance, high temperature resistance, low temperature resistance, etc.
Rubber sealing material features:
(1) Resilience and resilience;
(2) Appropriate mechanical strength, including expansion strength, elongation and tear strength.
(3) Stable performance, not easy to swell in the medium, and small thermal shrinkage effect (Joule effect).
(4) easy processing molding, and can maintain precision size.
(5) does not corrode the contact surface, does not pollute the medium, etc.
The above mentioned is the most commonly used sealing material is rubber, so the O-ring is mostly made of rubber material. There are many varieties of rubber, and new rubber varieties appear constantly. When designing and selecting, we should understand the characteristics of various rubbers and choose them reasonably.
 
 
Characteristics, Disadvantages and Process Application of Nitrile O-ring
 
What is nitrile rubber (Nitrile Rubber)? It is made by copolymerization with butadiene, the content is from 18 to 50, the higher the content, NBR rubber is a kind of rubber element suitable for hydraulic oil and other fluid media, especially the sealing element, it can be said that it is a rubber seal ring with wide use and low cost. There are 20 kinds of NBR polymers sold in the seal material market,
 
The difference between them lies in three aspects: one is the acrylonitrile content, polymerization temperature and Meni viscosity. The internal content of propylene has a great influence on the characteristics of vulcanized NBR rubber, and the scope of the influence includes the resistance (performance) to hydraulic oil and the low temperature state.
For petrochemical media resistance is better, but low temperature performance is worse. Obviously, the oil seal and O-ring seal of NBR rubber sealing material are commonly used rubber components.
 
First, the general use temperature range is -30~120 ℃. Today, Xiao Bian wants to share what media and characteristics do O-ring materials have?

What are the advantages of 1. NBR O-ring? It has good comprehensive mechanical properties, as well as good resistance to oil media, water resistance, solvent resistance and high-pressure oil characteristics, followed by good compression permanent deformation, wear resistance and elongation, etc. It is an excellent choice for hydraulic seal materials;

2. NBRO-ringNBR rubber O-ring seal is suitable for mineral hydraulic oil, silicone oil, lubricating oil, but not suitable for polar solvents, such as ketones, ozone, chloroform, brake fluid.

3. how to improve the process characteristics of NBR rubber sealing products? Through the supplementary process, the residual calcium chloride content in the NBR rubber sealing product can be controlled in the range of 800-1200 mg/kg, which can improve its tensile strength and 300% stress at fixed elongation, thus improving the product quality rate.

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More information

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

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The convenience of the use of industrial silicone buttons

In order to solve the above problems and technical defects, after continuous updating and design, a multi-station silicone button trimming machine was invented, and a utility model patent was applied. The utility model relates to a multi-position silicone button trimming machine, which comprises a base, a gantry frame and four cutting cylinders, and the four cutting cylinders are arranged vertically on the top of the gantry frame in a horizontal straight line. The beneficial effect achieved by the utility model is that the structure design is reasonable. By adopting the combination design of four reinforcement tables and four cutting blades on the gantry, the device can simultaneously trim four silicone button products. Thereby greatly improving the efficiency of trimming processing of silicone products. With the continuous expansion of the silicone button market, how to improve the processing efficiency of the silicone button has made producers pay more and more attention. The trimming of the silicone button is an important step in the production process of the silicone button, and the trimming of the traditional silicone button The processing efficiency cannot be improved, which affects the overall production efficiency of the silicone button. 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 characteristics that are difficult to replace other similar materials: 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. www.mingzhen2006.com

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