D-type solid conductive rubber strip

Definition and Structure

1. definition
   • D-type solid conductive rubber strip is a type of rubber product with conductive properties. Its shape is D-type (with a D-shaped cross-section) and the interior is a solid structure.
2. Structural composition
   • Rubber matrix: Rubber is its main matrix material, providing elasticity, flexibility, and certain physical and mechanical properties. Common types of rubber may include silicone rubber, nitrile rubber, etc. Silicone rubber has good high temperature resistance and aging resistance; Nitrile rubber performs well in terms of oil resistance and solvent resistance.
   • Conductive filler: In order to make the rubber strip conductive, conductive filler is added. Common conductive fillers include metal powders (such as silver powder, copper powder), carbon black, etc. Metal powder can provide high conductivity, while silver powder has excellent conductivity, but the cost is relatively high; Copper powder has good conductivity and low cost, but it is prone to oxidation. Carbon black is a commonly used conductive filler that can form a conductive network in rubber matrix, with relatively low cost and good stability.

Performance characteristics

1. Conductivity: The uniformly distributed conductive particles inside the D-type solid conductive rubber strip ensure its excellent conductivity, which can play a role in conductive connection in electrical equipment and ensure the normal transmission of current.

2. Sealing performance: Its soft sealing performance can effectively fill and seal the gaps between equipment, preventing dust, moisture, and other harmful substances from entering the interior of the equipment, playing a role in dust, water, and corrosion prevention.

3. Insulation performance: In addition to conductivity, D-type solid conductive rubber strips also have good insulation performance, which can prevent current leakage or short circuit to a certain extent, and protect the safety of equipment and personnel.

4. Durability: The D-type solid conductive rubber strip made of conductive silicone rubber has excellent heat resistance, aging resistance, oil resistance, and chemical corrosion resistance, and can be used for a long time in harsh working environments, extending the life of electrical equipment.

5. Customizability: D-type solid conductive rubber strips can be designed with specific product cross-sections and length dimensions according to the customer's usage environment to meet the needs of different fields and occasions.

Manufacturing process and processing methods

1. mixing process
   • Firstly, the rubber matrix material (such as silicone rubber or nitrile rubber) is put into a mixer for preliminary mixing. The mixing temperature is generally controlled between 80-120 ℃ and the time is about 10-30 minutes, in order to make the rubber matrix have a certain plasticity. Then add conductive fillers (such as silver powder, copper powder, or carbon black) and continue mixing. According to the characteristics and required conductivity of conductive fillers, the amount of conductive filler added is generally between 10% and 50% (mass fraction). During the mixing process, it is necessary to ensure that the conductive filler is evenly dispersed in the rubber matrix, which may take 20-60 minutes.
2. Molding method
   • The mixed materials can be extruded or molded into D-type solid conductive rubber strips. During extrusion molding, the temperature of the extruder is set between 90-150 ℃ according to the different rubber substrates, and the screw speed is generally 20-50 revolutions per minute. It is extruded into a D-shaped shape through a specific mold. Compression molding is the process of placing mixed materials into a D-type mold and pressing them for a certain period of time (usually 5-20 minutes) at 150-250 ℃ and a pressure of 10-50 MPa to produce a D-type solid conductive rubber strip.

application area

1. In the field of electronic devices
   • Used for electromagnetic shielding and grounding connections in consumer electronic devices such as computers, mobile phones, and tablets. For example, between the metal casing of a mobile phone and the internal circuit board, a D-type solid conductive rubber strip can provide a good conductive connection, ensuring that static electricity can be eliminated in a timely manner, while also playing a certain role in sealing and shock absorption.
2. aerospace field
   • Used for electrical connections, sealing, and electromagnetic shielding of aerospace equipment such as airplanes and satellites. In the aircraft's avionics compartment, it can seal the door to prevent external electromagnetic interference from entering the compartment and affecting the normal operation of electronic equipment, while ensuring good grounding of the equipment inside the compartment.
3. Automotive industry field
   • Used for sealing and conductive connections in electronic control systems, engine compartments, and other parts of automobiles. For example, in the sealing and grounding connection of the electronic control unit (ECU) housing in the engine compartment of a car, a D-type solid conductive rubber strip can prevent moisture and dust from entering the ECU, and ensure a good conductive connection between the ECU and the vehicle body, facilitating static discharge and electromagnetic compatibility.
4. Military equipment field
   • Used for electromagnetic protection, sealing, and conductive connections in military communication equipment, radar equipment, etc. In the sealing of military communication equipment chassis, it can prevent the influence of external electromagnetic interference on communication signals, while ensuring good grounding inside the equipment, improving the reliability and safety of the equipment.