Closed Back Rubber Grommets
| Material | Viton/FKM | Test Method |
| Specific gravity | 2.0/cm3 | ASTM D297 |
| Size | 3mm to 50mm diameter | - |
| Elongation at break | 175% (min) | ASTM D412 |
| Hardness | 75 Shore A | ASTM D2240 |
| Compression set 22hrs @200oC % | 9.3 | ASTM D395B |
Introduction
Closed back rubber grommets are a device used to connect and secure objects, usually made of rubber material.
Rubber grommets are usually used where objects need to be fixed or connected, such as at construction sites, ships, vehicles, etc., where various equipment, materials, or other objects need to be fixed or connected.
Features
1. Closed design: The back rubber grommet is a closed ring structure in which the two ends are connected to form a ring. This design allows the rubber grommet to completely wrap around the object being sealed, providing a better seal. The closed design also prevents dust, dirt, and other impurities from entering the sealed area, protecting the components being sealed.
2. Compression resistance: The rubber grommet on the back has good compression resistance and can maintain a good sealing effect when under pressure. This resistance to compression makes rubber grommets suitable for a variety of high-pressure, high-temperature, and high-speed sealing applications.
3. Wide adaptability: Due to the opening design of the closed back rubber grommets and the elastic properties of the rubber, it can adapt to objects of various shapes and sizes. Whether it's round, square, or irregularly shaped objects, grommets wrap tightly for a secure connection.
4. Reliable fastening: The rubber grommet on the back provides strong fastening force through the friction and resilience of rubber. Once the object is inserted and secured, it does not easily come loose, ensuring that the object remains stable in a variety of environments and conditions.
5. Shock absorption and noise reduction: Rubber materials have good shock absorption and noise reduction properties. When the object is impacted or vibrated, the closed back rubber grommets can act as a buffer, reducing the transmission of noise and vibration and improving comfort.
Classification
■ Classification by structure
1. Single-layer grommet: Made of a layer of rubber material, it has a simple structure and a low price.
2. Double-layer grommets: Made of two layers of rubber material, they have better elasticity and wear resistance and are suitable for higher-strength fixing requirements.
3. Reinforced grommet: Add metal or other materials to the periphery of the grommet to strengthen the structure and improve its load-bearing capacity and service life.
■ Classified by application areas
1. Construction grommets: suitable for fixing and connecting in the construction industry, such as ceilings, curtain walls, doors and windows, etc.
2. Ship grommets: suitable for fixing and connecting equipment and pipelines in the shipbuilding industry.
3. Vehicle grommet: suitable for fixing and connecting parts and equipment on cars, trucks, and other vehicles.
4. Grommets in other fields: According to specific needs, high-performance grommets suitable for aerospace, electronic equipment, medical equipment, and other fields can also be customized.
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