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

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…

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

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…

Solution for sealing the internal coil of car door handles

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…

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

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…

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

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

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

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…

Micro switch waterproof sealing solution | PUR 1680 polyurethane foam adhesive

Micro switches are widely used in precision electronic components such as automotive electronics, smart home appliances, industrial control, etc. due to their small size, sensitive triggering, and high reliability. However, due to its compact internal structure and sensitive electrical contacts, it is prone to switch failure, contact oxidation, and sensitivity reduction in humid, vibrating, or chemical environments. Therefore, waterproof sealing protection has become a key link to ensure the long-term stable operation of micro switches. Application challenge: PP shell+long-term sealing, failure to stick firmly is ineffective protectionThe housing of micro switches is often made of PP (polypropylene) material, which has low surface energy and strong inertness. Even after plasma treatment, many adhesives still exist:✅ Insufficient adhesion, cracking occurs under slight stress✅ After solidification, it becomes hard and brittle, and after fatigue aging, it peels off✅ The waterproof layer is discontinuous and cannot form a sealed structureAt present, some factories use Weifu 500 adhesive, but there is still a risk of bonding fatigue and sealing degradation under long-term humidity and external forces.Therefore, it is crucial to choose a highly reliable adhesive that can tightly bond with plasma treated PP and has a flexible sealing effect.Recommended product: PUR 1680 Micro Switch Special Waterproof Sealing AdhesivePUR 1680 is a single component moisture curing polyurethane reactive adhesive, particularly suitable for bonding low surface energy materials such as PP, PE, TPE, and sealing and packaging electronic devices.Core strengthsPerformance Characteristics and Advantages ExplanationAfter plasma treatment, PP has high adhesive strength and is firmly bonded without breaking or delaminationExcellent waterproof sealing performance can effectively block the infiltration of moisture, dust, and oil stainsAfter curing, the flexibility does not crack due to vibration or fallingEasy to operate, dispensing friendly, can be automated or manually applied, suitable for large-scale productionStrong temperature resistance and environmental adaptability, maintaining stable performance in…

Micro switch waterproof sealing solution: Elaplus high reliability epoxy sealing adhesive helps stabilize and protect

Waterproof Adhesive Solution for Automotive Lights – SIPC 1859 Organic Silicon

In the automotive industry, waterproof bonding of car lights is an important part of ensuring long-term stability of lighting fixtures. Optical components such as headlights, taillights, and daytime running lights are prone to problems such as water leakage, delamination, or PC material aging in harsh environments such as high temperature, humidity, and ultraviolet radiation if they lack effective waterproof bonding protection. Elapluus car lamp waterproof bondingCore requirements for waterproof bonding of car lightsWhen carrying out waterproof bonding of car lights, the following key performance should be paid attention to:Efficient bonding of PC materials: Car lamp covers are mostly made of polycarbonate (PC) material, and the adhesive needs to ensure long-lasting and strong adhesion.Non flowing and de methanol: During the construction process, the colloid does not flow, and solidification does not release methanol, ensuring the safety of optical transparent parts and internal components.Aging resistance and corrosion resistance: Car lights must withstand environmental tests such as temperature differences, humidity, rain, and ultraviolet rays during long-term use. The adhesive should be anti-aging and not corrode the PC material.Recommended product: SIPC 1859 silicone adhesive sealantSIPC 1859 is a high-performance single component silicone adhesive sealant designed specifically for waterproof bonding of car lightsExcellent PC adhesion: Directly bond PC lampshades without the need for primer, ensuring long-lasting stability.Black, non flowing: easy to construct, neat and beautiful glue line.Methanol removal environmentally friendly formula: does not release methanol during the curing process, protecting optical components and internal circuits.Aging resistance and corrosion resistance: The adhesive strength is maintained during high temperature, humid heat, UV and other aging tests without damaging the PC substrate.Dual function of waterproof sealing: achieving dual protection of adhesion and waterproof sealing, effectively extending the service life of car lights.Application scenarios SIPC 1859 is widely used for waterproof bonding of various automotive lighting fixtures:Front headlight assembly:…