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Industry Application

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Epoxy sealant | Oil pressure sensor packaging

2025-12-01

Oil pressure sensors are usually installed in the engine lubrication system and are exposed to high temperatures, strong vibrations, oil and fuel vapors for a long time. They also need to withstand harsh working conditions such as cold and hot shocks, refrigerant immersion, salt spray, and humid heat.Therefore, materials used for packaging electronic components inside sensors must meet the following key performance requirements:Excellent oil resistance and chemical stabilityCan resist long-term erosion from fully synthetic engine oil, mineral engine oil, transmission fluid, gasoline vapor, and common refrigerants.Wide temperature adaptation rangeThe engine compartment environment temperature fluctuates greatly, requiring materials to have long-term temperature resistance of -40 ℃ to 150 ℃ and be able to withstand transient high temperatures of the engine.Reliable mechanical and insulation performanceIncluding anti vibration, anti cracking, and stable electrical insulation to ensure the long-term stability of sensor output signals.Low water absorption and sealing performanceLong term exposure to humid and hot environments requires materials to have excellent moisture resistance to avoid insulation performance degradation and metal pin corrosion.EP 1710A/B two-component epoxy potting materialEP 1710A/B is a two-component solvent-free room temperature curing epoxy potting material developed specifically for packaging automotive electronics, motors, power tools, and electrical instruments. Its performance highly meets the requirements for the use of oil pressure sensors and is the preferred packaging solution for this type of product. Main performance advantages

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Automotive digital key sealing solution | PUR 1680, making smart keys more reliable and durable

2025-11-21

With the accelerated advancement of automotive intelligence, digital keys are becoming an important configuration for OEMs to enhance user experience. From NFC, BLE to UWB ultra wideband technology, the digital key integrates various electronic components internally, which puts higher requirements on the overall packaging and protective materials. How to ensure that the circuit board is not affected by moisture or vibration in complex and demanding environments? How to improve overall weather resistance and service life? This is precisely the key scenario where the smart key sealing adhesive plays a role.Among numerous material solutions, Yilian recommends high-performance PUR 1680 polyurethane potting adhesive – tailored for automotive digital key potting, with excellent fluidity, small gap filling ability, aging durability, and a bright and smooth cured appearance. It is one of the core materials for improving the reliability of smart keys.Why do digital keys need to use professional sealing glue?The car digital key has a compact structure and high component density, but its usage environment is extremely complexDigital key sealingHigh and low temperature impact (-40 ° C~85 ° C)Drop vibration caused by handheld useLong term risk of sweat, moisture, and rainwater intrusionOutdoor ultraviolet radiation and long-term agingTherefore, the requirements for sealing materials for digital keys include:High fluidity, capable of filling small gaps, fully enveloping componentsModerate toughness, absorbing impact without damaging componentsAfter curing, the appearance is smooth, without bubbles or whiteningLong term aging resistance, no yellowing or crackingGood adhesion to materials such as PC, ABS, and metalThese performances can be perfectly met by PUR 1680.02 PUR 1680- Ideal choice for sealing automotive digital keys✔ 1. Excellent liquidity, strong sealing ability with small gapsThe internal structure of digital keys is compact, and there is often only millimeter level space between the components and the housing.PUR 1680 has good fluidity and wettability, which can quickly penetrate…

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Solution for Sealing the Collision Sensor Shell and Bonding the Circuit Board

2025-11-21

With the widespread adoption of active safety systems in automobiles, crash sensors have become an indispensable key component in the overall vehicle safety system. Collision sensors are usually installed on the front, longitudinal beams, or side structures, with extremely high requirements for signal stability, environmental adaptability, and structural strength. In its internal structure, the sealing of the shell, the bonding and fixation of the circuit board, and the overall sealing protection are directly related to the stability of the sensor in high temperature, vibration, humidity, and impact environments. Therefore, it is crucial to choose appropriate potting adhesive, sealant, and circuit board bonding materials.In response to the typical application requirements of collision sensors, Yilian has launched three high reliability materials:PUR 1680, EP 1710, EP 1798- covering the entire application chain from shell sealing to PCB fixation to overall encapsulation. 01 Core requirements for adhesive used in collision sensorsThe collision sensor has a compact structure and is sensitive to accuracy and response speed, therefore the following material requirements are proposed:Low viscosity: suitable for sealing and flow with small gaps and complex structuresHigh adhesive strength: ensuring a strong bond between the circuit board and the housingLow CTE (coefficient of thermal expansion): Avoiding stress damage caused by temperature changesHigh temperature resistance level: suitable for environments in the engine compartment area of 150 ° C+Excellent thermal conductivity: effectively disperses heat from electronic componentsLong term aging resistance: resistant to moisture, salt spray, vibration, and impactCompliant with vehicle regulations: such as UL94 V-0, H-grade temperature resistance, etcBelow we will introduce the optimal combination of adhesive for different working conditions.02 Recommended products and application scenariosPUR 1680- Lightweight choice for low viscosity potting, shell sealing, and circuit board bondingRecommended applications: PCB bonding, shell sealing, small gap sealing Product Features: Ratio 100:16, low viscosity, excellent flowability, suitable for complex structure…

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Solution for sealing the internal coil of car door handles

2025-11-19

With the popularity of keyless entry systems (PEPS) in new energy and high-end fuel vehicles, door handles have been upgraded from traditional mechanical handles to intelligent components that integrate coils, micro switches, and antenna modules.These sensing coils are responsible for implementing key functions such as touch recognition, proximity sensing, and vehicle owner authentication, and their stability directly determines user experience and vehicle safety. Due to the long-term exposure of the door handle to the outdoors, its internal antenna coil needs to face:The damp heat cycle caused by long-term exposure to sunlight and rainCold and hot shock under temperature difference between winter and summer (-40~125 ℃)Structural fatigue caused by frequent pullingDifficulty in sealing due to narrow cavities and complex structuresTherefore, the sealing of the internal coil of the door handle must be selectedA special material system with low dielectric, low stress, temperature stability, moderate fluidity, and adhesive properties.Requirement analysis of sealing materialsBased on the structural characteristics of the car door handle antenna coil and the reliability requirements of the vehicle manufacturer, the core indicators for selecting adhesive are as follows:Temperature resistance performance (-40~125 ℃)Ensure that there is no cracking, detachment, or water leakage under severe thermal shock.Low dielectric constant (key!)Avoid affecting the signal resonance and transmission rate of the coil.Low hardness, low stress system Reduce stress concentration on the shell and components during thermal expansion and contraction processes.Good adhesion strength (PA66+GF, PC, metal)Ensure that the sealing body does not detach from the shell to prevent water leakage or structural looseness.Controllable liquidityIt is necessary to permeate the internal exhaust of the coil without being too thin to permeate excessively.Fast curing speed, improving production line efficiency The door handle usually needs to be glued in stages, so the curing time is crucial.In response to the above requirements, Yilian provides two preferred material systems…

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Science Popularization of Thermal Conductive Epoxy Structural Adhesive | Principles, Characteristics, and Engineering Application System Analysis

2025-11-19

01 | What is thermal conductive epoxy structural adhesive?Thermally Conductive Epoxy Structural Adhesive is a high-performance adhesive material that uses epoxy resin as the matrix, adds high thermal conductivity fillers, and forms a dense three-dimensional network structure through crosslinking reactions with curing agents. Its material essentially consists of three types of properties: ① Structural StrengthHigh shear strength, high peel strengthAnti impact, anti vibration, anti fatigueDimensional stability for long-term serviceIt can replace traditional mechanical fixing methods such as screwing, riveting, and welding.② Thermal ConductivityThermal conductive fillers (such as Al ₂ O3, BN, AlN) form a continuous thermal conduction chain during the curing process, giving the material significantly higher thermal conductivity than ordinary epoxy.This function is used for heat transfer of heating components and reduction of interface thermal resistance.③ Epoxy system functionality (Chemical&Environmental Stability)The epoxy matrix forms a stable three-dimensional structure through cross-linking and curing, with:Good temperature resistanceExcellent electrical insulation capabilityResistant to media, moisture and heat, and aging performanceMake it suitable for long-term complex environments.02 | Curing mechanism and interface bonding principleThermal conductive epoxy structural adhesives often use two-component A/B formulations.The standard mixing ratio of Yilian EP 2010A/B high thermal conductivity epoxy structural adhesive is 100:50 (weight ratio).The curing mechanism includes:① Epoxy ring opening and crosslinking reactionThe mixed epoxy group and curing agent undergo ring opening polymerization, and the system changes from liquid to gel to solid, finally forming a high modulus three-dimensional cross-linking structure.② Construction of Thermal Conductive NetworkHigh thermal conductivity fillers form a continuous heat transfer chain during the solidification process of the system, enabling the solidified body to effectively transfer heat outward.③ Surface interface chemical bondingEpoxy has high polarity and is compatible with metals, ceramics SMC、 Chemical bonding or polar adsorption is formed between composite materials and other substrates to improve interfacial stability.03 | EP 2010A/B: Representative of Typical…

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How to choose the adhesive for fixing the motor coil? An article takes you to understand the core principles and adhesive solutions

2025-11-19

With the rapid development of industries such as electric tools, home appliances, electric vehicles, drones, etc., motors are constantly upgrading with the goal of smaller size, higher efficiency, and stronger reliability. Inside a motor, the Motor Coil Fixing Adhesive, although inconspicuous, is a key material that affects the lifespan, stability, and safety of the motor. Today, we will start from a popular science perspective and explain in an article:Why do motor coils have to use adhesive?What are the common types of motor adhesives?How to choose the one that suits your motor?What is the latest trend in adhesive usage in the industry?1、 Why do motor coils need to be fixed and bonded?In environments with high-speed rotation, high temperature, and high vibration, motor coils will face: Strong vibration impactOnce the coil becomes loose, it can cause noise, unstable magnetic field, decreased efficiency, and even lead to short circuits.

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Plastic bonding solution for electronic components – PUR 1672 A/B&PUR 1635 high-performance polyurethane materials

2025-11-17

In electronic assembly and structural bonding, stable connections between plastics have always been a challenge that engineers cannot avoid, especially for ABS and PC materials. There is a significant difference in the physical properties between the two materials. Traditional adhesives either cannot stick firmly or are too brittle and prone to aging after curing, making it more difficult to maintain long-term reliability under complex working conditions. In order to meet the needs of new generation electronic devices for waterproofing, moisture resistance, earthquake resistance, electrical insulation, and reliable bonding, Yilian has launched two professional grade polyurethane materials – PUR 1672 A/B and PUR 1635, which are suitable for bonding, sealing, and potting applications of plastic shells such as ABS and PC. They are widely used in communication equipment, power modules, sensors, controllers, and other fields.Automotive parts ABS and PC bondingAutomotive parts ABS and PC bonding01 | PUR 1672 A/B: Flexible Polyurethane Adhesive+Sealing and Sealing Integrated SolutionPUR 1672 A/B belongs to two-component solvent-free resin elastomers, which have high fluidity, low hardness, deep curing ability, and excellent adhesion, especially suitable for adhesive sealing and electronic potting of plastic parts such as ABS and PC. Core advantages and highlights:

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What adhesive is used for bonding electronic component shells? ——PUR 1680 (D70) A/B polyurethane sealant professional solution

2025-11-17

Against the backdrop of the continuous development of electronic products towards lightweight, high reliability, and extreme environmental resistance, shell bonding and internal encapsulation have become key factors affecting the stability of electronic devices. Whether it is communication equipment, sensors, control power supplies, or ignition controllers, internal components all face challenges such as humidity, vibration, temperature shock, electrical interference, and outdoor exposure. In order to enhance the overall assembly strength and protect internal components, Yilian has launched PUR 1680 (D70) A/B high hardness polyurethane sealant, specifically designed for bonding and sealing electronic component housings.1、 Core advantages of PUR 1680 (D70) A/B polyurethane sealant

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Solution for wiring harness board sealing with adhesive | SIPA 1850 gray two-component addition molding silicone

2025-11-17

In the continuous upgrading of new energy vehicles, energy storage equipment, and intelligent manufacturing equipment, the stability of the wire harness PCB directly determines whether the system can operate stably in complex environments such as high temperature, vibration, and humidity for a long time. In order to ensure the weather resistance and reliability of the wiring harness board, the encapsulation process has become an indispensable part. Adhesive for wiring harness board sealing In the face of changing application environments, engineers often make the following requirements for sealant:✔ Having certain thermal conductivity to avoid heat accumulation affecting the lifespan of electronic components✔ The adhesive strength does not need to be too high, but it should maintain flexibility and fatigue resistance✔ Two component addition molding silicone system, combining low stress and high reliability✔ Fast curing speed, improving production line efficiencyIf you are looking for a material that meets the above requirements – SIPA 1850 gray is worth paying close attention to.Recommended product: SIPA 1850 gray thermal conductive sealantSIPA 1850A/B is a two-component addition molding silicone sealant designed specifically for electronic modules, high-temperature devices, and wiring harness boards. Its 1:1 mixing ratio, excellent fluidity, and good thermal stability make it highly suitable for convenient and efficient sealing processes.🔹 Core FeaturesTwo component addition molding silicone system, uniform curing, no shrinkage1: 1 ratio, automatic mixing machine and manual operation are both very convenientLow hardening shrinkage rate to avoid damage to solder joints or components under stressExcellent high-temperature electrical insulation ensures long-term stability of the wiring harness boardGood thermal conductivity, meeting general heat dissipation needsStrong waterproof and moisture-proof performance, improving the reliability of the whole machineFlame retardant rating UL 94 V-0, meets automotive electronic safety regulationsStrong deep curing ability, suitable for large volume sealingCompliant with ROHS/SVHC REACH environmental regulationsView SIPA 1850 detailsTypical application areasSIPA 1850 gray…

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