According to Dessò engineers, rubber bodies are mainly used for sealing and protection in M12 connectors. It effectively prevents moisture, dust and other contaminants from penetrating into the inside of the connector, so as to ensure that the electrical and mechanical properties of the connector are not affected. In addition, the rubber body also has a certain shock-absorbing effect, which can absorb and cushion external shocks and vibrations, and protect the conductive contacts and insulation materials inside the connector from damage. Therefore, the physical properties of the rubber body are directly related to the service life and reliability of the M12 connector.
The hardness of the rubber body is an important factor affecting its sealing performance and mechanical strength. Too much hardness will cause the rubber body to lose its elasticity and fail to fit snugly into the shell of the connector, thus reducing the sealing effect; If the hardness is too low, the rubber body will be easily deformed and unable to withstand external shocks and vibrations. Therefore, it is necessary to select the appropriate hardness according to the specific application scenarios and requirements of M12 connectors.
Tensile strength and elongation are important indicators to measure the mechanical properties of rubber. Tensile strength refers to the maximum tensile force that the rubber body can withstand during the stretching process, while elongation refers to the degree of deformation of the rubber body during the stretching process. These two indicators directly affect the wear resistance, tear resistance and service life of the rubber body. For M12 connectors, a rubber body with high tensile strength and moderate elongation needs to be selected to ensure that it can maintain good mechanical properties during long-term use.
Compression set is an important indicator of the ability of a rubber body to recover after long-term compression. In the case of M12 connectors, the rubber body needs to withstand the weight of the cable harness as well as external shock and vibration, so it is required to have good compression recovery performance. Choosing a rubber body with a low compression set ensures that it retains stable sealing properties over long periods of use.
M12 connectors may need to work in different temperature environments, so the rubber body is required to have good temperature resistance. In a high-temperature environment, the rubber body needs to maintain a certain elasticity and mechanical strength to avoid deformation or melting; At low temperatures, the rubber body needs to maintain a certain degree of flexibility to avoid hardening or cracking. Choosing rubber materials with wide temperature range adaptability can meet the needs of different application scenarios.
During the use of rubber body, it will be affected by environmental factors such as oxygen, ultraviolet rays, and ozone, resulting in a gradual decline in its performance. Therefore, the rubber body is required to have good aging resistance and be able to maintain stable physical and chemical properties for a long time. Choosing rubber materials with additives such as antioxidants and ultraviolet absorbers can improve their aging resistance.
The contact part of the rubber body with the metal housing needs to have good adhesion and sealing to prevent moisture and contaminants from seeping into the connector through the interface. In addition, the rubber body should not produce excessive permanent deformation when compressed by the metal casing to ensure a long-term stable sealing effect.
The rubber body in the connector should not affect the normal operation of the conductive contacts. This means that the rubber body should have good insulating properties to prevent the occurrence of electrical short circuits. At the same time, the rubber body should not be excessively deformed or worn when subjected to the pressure of the conductive contacts to maintain long-term electrical stability.
There should be good compatibility between the rubber body and the insulating material to avoid chemical reactions or changes in physical properties during long-term use. This ensures that the connector retains stable electrical and mechanical properties throughout its lifetime.