Potting glue_bonding sealant_conformal coating

What is the best adhesive for bonding rubber?

2025-02-20

Rubber adhesives play a crucial role in various industries. Whether it is firmly connecting rubber components to metal, plastic, or other rubber components to form functional components, rubber bonding is essential.For example, in the automotive industry, rubber adhesives are crucial for manufacturing seals, gaskets, and shock absorbers. In industrial machinery, it ensures the durability of rollers and belts. Medical devices rely on adhesive rubber to manufacture flexible tubes or protective covers. Rubber adhesives are also commonly used in consumer goods such as footwear and electronics, as their durability and functionality are crucial. Whenever a product requires strength, flexibility, or environmental resistance, rubber bonding becomes a critical step in the manufacturing process. Why is rubber type crucial for bonding?Each type of rubber material has different characteristics, such as flexibility, chemical resistance, and surface energy, which can affect its compatibility with adhesivesLow surface energy: such as silicone and EPDM rubber, require the use of primer or specialized adhesive to ensure firm bonding.Plasticizer migration: Rubber such as NBR, SBR, EPDM, etc. may release plasticizers over time, affecting long-term adhesion performance.Environmental conditions: Some rubbers perform well in extreme temperatures or harsh environments, requiring adhesives to work under these conditions.Surface treatment of rubber bondingProper surface treatment is crucial to ensure the firmness of rubber bonding. Rubber surfaces often adhere to contaminants such as release agents, slip additives, or lubricants, which can affect adhesion.Cleaning the surface with solvents such as isopropanol can effectively remove these impurities, but it is important to avoid using corrosive solvents such as acetone, which may damage certain rubber.To improve adhesion, surface energy can be increased by polishing the rubber surface or using plasma, chemical primer, and other methods, especially for low surface energy rubber such as silicone and EPDM.Due to the migration of plasticizers in certain rubbers over time, it is…

Application of Silicon potting compound| Thin Layer Coating or Potting of PCB Circuit Board

2025-02-18

In the manufacturing process of modern electronic products, PCB circuit boards (printed circuit boards) play a crucial role. With the continuous enhancement of electronic device functions, the design and manufacturing of PCB circuit boards have become increasingly complex, and the requirements for their protection and packaging have also become higher. Among these requirements, the application of PCB thin layer coating and encapsulation is particularly important, as they can effectively enhance the mechanical strength, seismic resistance, waterproofing, and corrosion resistance of the circuit board. To ensure the effectiveness of these applications, it is crucial to choose the appropriate adhesive. Today ELAPLUS will focus on introducing SIPC 1812 transparent silicone adhesive sealant, a high-performance adhesive sealant designed specifically for PCB thin layer coating or encapsulation. ELAPLUS circuit board thin-layer encapsulationThe SIPC 1812 series sealant absorbs moisture from the air at room temperature and solidifies. It is a deoxime type silicone adhesive sealant made of special silicone rubber material as the base material and cannot be cured by heating. It has good adhesion and sealing performance for the vast majority of materials, protecting electronic products under harsh conditions.Product FeaturesThe cured elastomer of RTV 1812 series silicone adhesive sealant has the following characteristics:✔ Resist moisture, dirt, and other atmospheric components✔ Reduce mechanical stress and tension caused by mechanical, thermal shock, and vibration✔ Excellent electrical insulation performance, anti corona✔ Excellent outdoor aging resistance, with a service life of up to 20-30 years. Test item Test standard Unit 1812W 1812B Property before curing colour Visual — White Black viscosity GB/T 2794-2013 25℃, mPa·s 12000 12000 density GB/T 15223-1994 25℃, g/cm3 1.07±0.05 1.07±0.05 Tack free time GB/T13477.5-2002 25℃, 55%RH,min 10-25 10-25 Property after curing Hardness GB/T 531-2008 Shore A 26 26 Thermal conductivity GB/T 10297-1998 W/m.K 0.27 0.27 Elongation at break GB/T 528-2009 % ≥250 ≥250 Tensile…

PUR 1601- Ideal choice for fixing automotive switch wiring harnesses

2025-02-18

With the increasing level of automotive electronics, more and more complex electronic devices are being integrated into cars, which poses higher challenges to the design and fixing requirements of automotive wiring harnesses. Automotive switch wiring harnesses not only need to provide stable power connections, but also need to adapt to complex working environments, with high durability and flexibility. Therefore, selecting appropriate adhesive materials to ensure stable and long-term reliability of the wiring harness has become the top priority for automotive manufacturers and suppliers.Among them, switch wiring harnesses are usually composed of various substrates such as PVC material, metal, plastic, etc. Traditional bonding methods or materials often fail to maintain sufficient stability when facing high temperatures, high humidity, bending, and long-term stress, resulting in problems such as loose, detached, or even broken connections in switch wiring harnesses. How to choose an adhesive that can provide strong adhesion on multiple material surfaces while withstanding repeated bending, aging resistance, and chemical erosion has become an urgent problem to be solved. Fixing of automotive switch wiring harnessChallengeBending stress: Automotive switch wiring harnesses often require bending and stretching, especially during installation and dynamic changes in vehicle operation, where the wiring harness needs to undergo frequent bending. Ordinary adhesives may crack or fail during repeated bending due to a lack of sufficient flexibility and elasticity. Therefore, choosing an adhesive with excellent flexibility and high elasticity has become crucial.Adhesive bonding of PVC material: PVC, as a common plastic material, has good electrical insulation and durability, but its surface is smooth and prone to forming an oxide layer, which makes it difficult for many adhesives to effectively bond. In the car environment, insufficient adhesion between PVC surface and other materials may result in the adhesive being unable to firmly fix the switch harness, thereby affecting the overall stability…

Case Study on Sealing High Voltage Power Supply for Industrial Inspection X-ray Machine in Security Inspection

2025-02-18

As the security industry’s requirements for equipment reliability and safety continue to increase, X-ray machines, as one of the core equipment, especially the high-voltage power supply part, need to operate stably in a high-voltage environment for a long time. Therefore, how to effectively protect high-voltage power sources and ensure their safe and stable operation under extreme conditions such as high voltage, electrical and thermal stress has become a key issue in equipment research and production.In this field, choosing the appropriate sealing adhesive material is particularly important. In order to meet the special requirements of high-voltage power supply for industrial inspection X-ray machines, we recommend using EP 6225-54 two-component epoxy sealant. This product has become an ideal potting material due to its high voltage resistance, excellent resistance characteristics, and low coefficient of thermal expansion (CTE), and is widely used in such equipment.Sealing of high-voltage power supply for X-ray machine Background of sealant material demandThe high-voltage power supply of the X-ray machine needs to operate at extremely high voltage, so the sealing material must have the following characteristics:High voltage resistance: able to withstand high voltage environments, ensuring the safety of power components.High resistance characteristic: Ensure that the material has sufficient resistance to prevent electrical short circuits or leaks.Low coefficient of thermal expansion (CTE): avoids stress and deformation caused by temperature fluctuations, ensuring the stability of components.Large volume encapsulation capability: suitable for power components with large volumes, ensuring sufficient protection.Recommended productsEP 6225-54 is a 1:1 two-component epoxy potting adhesive designed specifically for electrical equipment, with the following advantages:High voltage resistance: This adhesive material exhibits excellent electrical insulation ability in high voltage environments, preventing electrical faults.High resistance: Provides strong electrical insulation to prevent current leakage or short circuit.Low CTE: Its low coefficient of thermal expansion ensures that the material remains stable during temperature changes,…

Elaplus Case Study of Industrial Power Source Encapsulation

2025-02-18

In modern industry, power equipment is widely used in various fields, including communication devices, transformers, control power supplies, ignition controllers, and electronic sensors. These devices typically require good protective performance to ensure long-term stable performance. As an important electrical protection method, encapsulation technology can not only enhance the mechanical strength of equipment, but also improve its ability to resist moisture, pollution, and vibration. Among numerous potting materials, PUR 1670A/B two-component solvent-free resin elastomer composite has become the preferred material in the field of industrial power potting due to its excellent performance advantages. Customer backgroundThe customer in this case is a leading manufacturer of power control modules, specializing in providing high-performance power solutions for industrial automation equipment, communication equipment, and high-end electronic sensors. Due to the stable supply of high-frequency and high-voltage currents involved in its products, it places extremely high demands on the reliability and safety of the power module. Especially in extreme environments such as temperature changes, moisture erosion, mechanical vibration, etc., the sealing and insulation of power equipment need to be effectively guaranteed.Solution: Use PUR 1670A/BAfter a detailed technical evaluation, the customer has decided to use PUR 1670A/B as the sealing material. PUR 1670A/B has a range of excellent properties, making it an ideal choice for industrial power potting.PUR 1670A/B is a two-component solvent-free room temperature or heat cured resin elastomer composite used in two-component sealing, filling, flame retardant, thermal conductivity and other fields. The raw materials are free of heavy metals, environmentally friendly, and have a wide range of process operability. The finished product has high physical properties and good adhesion to the substrate. It can be cured at room temperature or by heating, and can be deeply cured. The two-component mixture has good fluidity and excellent flexibility after curing. It is used for casting and sealing…

Microwave Oven Bottom Plate Bonding Solution: High Temperature and Bonding Performance of SIPC 1856

2025-02-14

In the home appliance industry, microwave ovens are one of the daily kitchen equipment, and the stability and durability of their internal components directly affect the product’s service life and safety. Especially in the bonding process of the bottom plate of the microwave oven, it is required that the adhesive not only maintains a strong bond at high temperatures, but also adapts to the powder coating process on the surface of the microwave oven bottom plate.Microwave oven bottom plate bonding Case sharingWhen producing microwave ovens, customers face a tricky bonding problem: the bottom plate of the microwave oven needs to be treated with powder coating technology to improve its surface hardness and wear resistance. But after powder coating treatment, the surface of the bottom plate is very irregular and prone to oil stains, which makes traditional adhesive glue unable to provide sufficient bonding force.In addition, the internal temperature of the microwave oven is extremely high during use, and the bottom plate, as one of the supporting components, is exposed to high temperatures for a long time. The adhesive material must have strong high-temperature resistance. If the glue fails at high temperatures, it may cause the bottom plate to loosen or even fall off, affecting user safety.Therefore, customers urgently need a glue that can solve the problem of insufficient adhesion of powder coated parts and withstand high temperatures, to ensure that the bottom plate of the microwave oven is always firm and reliable during long-term use.SolutionAfter in-depth research and testing, ELAPLUS recommends using SIPC 1856, a black adhesive designed specifically for precision bonding in high-temperature environments. With a viscosity of 70000 CPS, it can provide strong adhesion on powder coated surfaces without sinking or deformation.RTV 1856 alcohol free silicone adhesive sealant is a neutral silicone sealing material that absorbs moisture from…

Silicone sealant | Coating for coil wrapping of rotary transformer

2025-02-14

Rotary transformers, as electrical equipment with high precision and stability requirements, are widely used in various industrial automation and control systems. Especially in fields such as electric motor drive, robotics, aerospace, etc., rotary transformers have extremely high requirements for environmental adaptability. To ensure its stable operation under harsh conditions such as long-term, high temperature, high pressure, and vibration, coil wrapping and sealing treatment are crucial. Silicone sealant | Coating for coil wrapping of rotary transformerThe challenge of wrapping the coil of a rotary transformerThe coils of a rotary transformer typically require protection through encapsulation or coating to address the following challenges:High temperature environment: Transformers may experience temperatures above 150 ° C during operation, and it is required that the sealing material can work stably for a long time to prevent material aging and failure caused by temperature fluctuations.Good permeability and wrapping: In the coil wrapping of the rotary transformer, it is required that the sealant can effectively penetrate into the gaps between the coils, ensuring that there are no missed areas and providing uniform protection.Resistance to mechanical and thermal shock: Rotary transformers are often exposed to environments of vibration, shock, and thermal changes, so their sealing materials must be able to alleviate the stress caused by mechanical and thermal shock.SolutionRTV SIPC 1823 neutral dealcoholized silicone adhesive sealant is a flowable moisture absorbing cured silicone gel that forms a flexible rubber body after curing, fully complying with the EU ROHS directive requirements. During the curing process, alcohol substances are released, which are non corrosive to materials such as polycarbonate (PC) and copper. They have good adhesive and sealing properties for the vast majority of materials, protecting electronic products in a stable state under harsh conditions.The elastic material coated with RTV 1823 silicone adhesive sealant on the coil after curing has the…

Application of adhesive sealant: case study on lead sealing of electric vehicle control box

2025-02-14

With the booming development of the electric vehicle (EV) industry, more and more electronic control units (ECUs) and electrical components are facing increasingly harsh working environments. These control boxes usually need to maintain a high degree of protection, especially the sealing of the lead parts, to prevent moisture, dust, or chemical substances from penetrating and to avoid damage to the electrical system. Therefore, selecting appropriate adhesive materials has become one of the key factors that electric vehicle manufacturers must consider when designing electrical control systems.Customer Case Study Sharing——Application: Lead sealing of electric vehicle control boxLead sealing of electric vehicle control box ——Glue Point: Sealing of Outward Line——Functional requirements: For wire harness wrapping and bonding, with good filling properties between small and parallel wire harnesses——Viscosity range: 30000-70000 cpsBased on the above requirements, Yilian SIPC 1823 high-performance silicone sealant has become an ideal solution for sealing the leads of electric vehicle control boxes due to its excellent adhesion, good filling properties, and suitable viscosity.RTV SIPC 1823 neutral dealcoholized silicone adhesive sealant is a flowable moisture absorbing cured silicone gel that forms a flexible rubber body after curing, fully complying with the EU ROHS directive requirements. During the curing process, alcohol substances are released, which are non corrosive to materials such as polycarbonate (PC) and copper. They have good adhesive and sealing properties for the vast majority of materials, protecting electronic products in a stable state under harsh conditions. The lead sealing RTV 1823 silicone adhesive sealant of the electric vehicle control box has the following characteristics after curing:✔ Single component, easy to use, short non stick time✔ Excellent chemical resistance✔ Resist moisture, dirt, and other atmospheric components✔ Reduce mechanical stress and tension caused by mechanical, thermal shock, and vibration✔ Excellent electrical insulation performance, anti corona✔ Excellent outdoor aging resistance, with a service…

Elaplus PCB Terminal Sealing Solution

2025-02-12

In the production process of modern electronic products, PCB (printed circuit board) is one of the core components, especially in products that require long-term stable operation, the protection of wiring terminals and solder joints is particularly important. A certain electronic manufacturing company is facing severe challenges when producing PCBs for industrial equipment. Wiring terminals and solder joints are often exposed to harsh environments such as high temperatures, moisture, dust, and chemical corrosion. These environmental factors not only easily lead to circuit short circuits, corrosion, and solder joint damage, but also may cause product failures, thereby affecting the stability of the entire system and customer satisfaction.Especially in scenarios that require waterproofing and moisture resistance, traditional solder joint protection methods often fail to provide sufficient sealing and bonding strength, ultimately affecting the long-term service life of the product. Therefore, the company urgently needs a material solution that has excellent waterproof, moisture-proof, and corrosion-resistant properties, while effectively enhancing the strength of solder joints and protecting wiring terminals. Application: PCB terminal sealing caseAdhesive dots: waterproof sealing of plastic terminals, reinforcement and protection of solder jointsSealing solution for PCB wiring terminalsFunctional requirements: Flame retardant V-0, good adhesionViscosity range: high viscosity microfluidicsSolution: SIPC 1816 silicone adhesive sealantRTV SIPC 1816 ketoxime type silicone adhesive sealant is a neutral silicone sealing material that absorbs moisture from the air and solidifies at room temperature. The product is environmentally friendly and has been certified by ROHS, Reach, TSCA, and VOC. It has good adhesion and sealing performance for the vast majority of materials, protecting electronic products in a stable state under harsh conditions.The cured elastomer of RTV 1816 silicone adhesive sealant has the following characteristics:✔ Excellent chemical resistance✔ The adhesive layer is elastic, scrub resistant, and has good adhesion✔ Resist moisture, dirt, and other atmospheric components✔ Reduce mechanical stress and…