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New Choice for Packaging NTC Components of Temperature Sensors – EP 2029 Epoxy Structural Adhesive

2025-12-25

In modern industrial and automotive electronics applications, temperature sensors play a key role, especially NTC (Negative Temperature Coefficient) components, which are used to accurately monitor temperature changes and ensure safe operation of equipment. However, with the increasing complexity of application environments, temperature sensors face many challenges:NTC component encapsulation Background and ChallengesHigh temperature and high humidity environmentTemperature sensors often operate within a wide temperature range of -50 ℃ to 180 ℃, and require long-term resistance to external environmental erosion such as moisture, dust, and oil. Ordinary packaging materials are prone to cracking, detachment, or performance degradation.Mechanical stress and vibration impactNTC components are usually small in size and precise, and are susceptible to vibration, impact, or stress during installation. If the packaging material has high rigidity or poor fluidity, it can cause component damage or poor contact.Multi material bonding requirementsThe temperature sensor component involves different materials such as metal, ceramic, fiberglass cloth, aluminum, and plastic. The encapsulation adhesive needs to be able to wet well and provide high-strength bonding to avoid cracking caused by thermal expansion and contraction.Yilian EP 2029- Ideal Solution for NTC Packaging of Temperature SensorsEP 2029A/B is a 2:1 two-component epoxy structural adhesive with thixotropy, which does not sag after dispensing and is very suitable for precision component packaging. Its main advantages include:High reliability packaging: resistant to a wide range of high and low temperatures (-50 ℃ -180 ℃), maintaining stable physical and chemical properties for a long time.Excellent adhesion: It has excellent adhesion to various materials such as metal, ceramic, fiberglass cloth, plastic, and aluminum, reducing the risk of component cracking or detachment.Resistance to environmental erosion: After solidification, the colloid can resist moisture, oil stains, and other atmospheric components, without solvents or solidification by-products, reducing secondary pollution. Easy to operate: It can be cured at room temperature or…

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Potting Solution for Electric Tool Controller | PUR 1627 Thermal Conductive Flame Retardant Potting compound IP68 Protection

2025-12-25

——Thermal conductivity, flame retardancy, IP68 comprehensive protectionIn electric tools such as drills, hammers, angle grinders, impact wrenches, etc., the controller is equivalent to the “brain” of the entire machine. It works in a complex environment with high current, high temperature rise, strong vibration, dust, and water vapor coexistence for a long time. Once the sealing material is selected improperly, it is prone to:Excessive temperature rise, power device failureMoisture intrusion can cause short circuits and corrosionLong term vibration leads to cracking of solder joints and detachment of componentsInsufficient flame retardant rating poses safety hazardsTherefore, controller encapsulation is not just about “filling it up”, but requires systematic requirements for material performance and reliability.1、 The core challenge of sealing electric tool controllersone ️⃣ Both heat dissipation and insulation must be taken into accountThe power MOS, IGBT, and drive module continue to generate heat, requiring effective thermal conductivity of the potting material while maintaining excellent electrical insulation to avoid leakage risks.2. ️⃣ The flame retardant level is directly related to safetyElectric tools belong to high-power equipment, and the sealing material must meet the UL 94 V-0 flame retardant rating, which does not support combustion or drip under abnormal working conditions.3 ️⃣ High waterproof and moisture-proof requirementsIn outdoor or construction site usage scenarios, rainwater, condensate, and dust are everywhere. The controller needs to achieve IP68 protection, and the sealing material must have low water absorption and long-term stability.4 ️⃣ Complex structure with high requirements for process friendlinessThe internal components of the controller are dense and have many gaps. The sealing adhesive needs to have low viscosity, good fluidity, and a wide operating window to ensure complete coverage and no gaps.2、 Recommended solutions PUR 1627 thermal conductive flame-retardant polyurethane sealant PUR 1627 provides a highly balanced solution between performance and process to address the aforementioned challenges…

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Pressure sensor silicon gel potting solution | SIGEL 1806 | ELAPLUS

2025-12-25

Intelligent equipment upgrade, higher packaging requirements for pressure sensorsWith the rapid development of drones, humanoid robots, robotic dogs, and CNC precision equipment, pressure sensors have become key sensing units widely used for:Air pressure/altitude detection Force feedback and tactile perceptionHydraulic and pneumatic pressure monitoringThese new application scenarios generally have the following characteristics:Equipment miniaturization and highly integrated structureContinuous vibration and impact during operationExtremely high requirements for measurement stability and long-term reliabilityIn this context, the internal sealing material of pressure sensors is no longer just a simple protective material, but a key factor that directly affects the accuracy, stability, and service life of the sensor.Industry challengesThe Three Core Difficulties in Sealing Pressure SensorsChallenge 1: Devices are extremely sensitive to stressPressure sensors typically contain MEMS chips, sensitive membranes, and fine lead structures inside.If the hardness of the sealing material is too high or the curing shrinkage is large, it is easy to generate internal stress after packaging, resulting in:zero driftDecreased sensitivityLong term stability deterioratesChallenge 2: Vibration and impact under dynamic working conditionsIn applications such as drones and robotic dogs, sensors need to withstand long-term:high-frequency vibrationInstantaneous impact accelerationStructural stress changes caused by repeated start stop cyclesThe sealing material must have good buffering and shock absorption capabilities, rather than simply “filling”.Challenge Three: Balancing Environmental Protection and Signal StabilityIn complex environments, potting materials need to achieve both:Moisture, dust, and pollution preventionLong term reliable protectionAt the same time, it cannot interfere with the transmission of pressure signals, which puts higher demands on the flexibility and stability of the material.SolutionFilling Scheme of SIGEL 1806 Low Stress Silicon gel Pressure SensorSIGEL 1806 is a two-component silicon gel material specially designed for precision electronic and pressure sensor packaging, which can effectively meet the above challenges. Core advantages of the plan:1: 1 Two component silicon gel systemSimple ratio, suitable for manual or…

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Solution for Partial Encapsulation of Contactor Induction Switch

2025-12-01

In automotive electronics, home appliance controllers, and intelligent devices, the contactor induction switch is the core induction and triggering unit. Its working environment is often accompanied by moisture, vibration, dust, and cold and hot cycles, which impose strict requirements on the protection of internal circuits. In order to further enhance the stability, durability, and protective performance of products, more and more manufacturers are adopting the “local encapsulation inside the shell” scheme to achieve long-term sealing protection of sensitive circuit boards (PCBs) and sensing areas.Today, we introduce to you a widely used and highly stable fast curing epoxy adhesive in the industry – EP 2005 fast curing epoxy adhesiveIt is particularly suitable for this scenario:✔ PA66+30% fiberglass shell✔ Partial sealing protection✔ Waterproof and moisture-proof✔ Rapid solidification and improved production efficiency1、 Application background: Why does the contactor induction switch need local sealing?Induction switches are responsible for real-time response to external actions, and their internal circuits include components such as coils, capacitors, resistors, PCBs, etc. Once exposed to moisture, dust, or chemical media, it will cause:Trigger malfunctionOutput drift and misoperationDecreased electrical performanceMetal contact oxidationSignificant decline in lifespanTherefore, manufacturers generally adopt local sealing technology to provide:Sealing protectionAvoid water vapor intrusion and improve equipment lifespan.Mechanical protectionAbsorb vibrations and prevent solder joints from cracking.Electrical insulationReduce risks such as short circuits and electrical leakage.Adapt to cold and hot cycling environments-Environmental stress between 40 ℃ and 85 ℃ will not cause material cracking.Choosing the appropriate sealant is crucial among these requirements.2、 EP 2005 Fast Curing Epoxy Adhesive – A Professional Adhesive Suitable for Rapid SealingEP 2005 is a two-component fast curing epoxy adhesive that combines adhesion, sealing, and protection. It is specifically developed for application scenarios that require “fast assembly+high-strength protection”, and is particularly suitable for internal sealing of intelligent automotive induction switches, micro switches, and sensors. Product…

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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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