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 bonding
Automotive parts ABS and PC bonding
01 | PUR 1672 A/B: Flexible Polyurethane Adhesive+Sealing and Sealing Integrated Solution
PUR 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:
- Super liquidity, easy to construct
The low viscosity characteristic enables it to quickly penetrate complex structures and narrow gaps, adapting to automatic glue filling equipment, saving time and reducing rework. - Curing is flexible and not brittle
After curing, it has low hardness and small modulus, excellent flexibility and impact resistance, and can effectively absorb mechanical vibrations without falling off or cracking due to thermal expansion stress. - Excellent electrical performance
Low dielectric constant ensures stable electromagnetic propagation performance, making it very suitable for scenarios such as power modules and communication equipment that require signal integrity. - Integrated waterproof and moisture-proof protection
After curing, it has excellent waterproof performance, can block external moisture for a long time, and improve product life. - Broad spectrum adhesive force
Strong adhesion to various substrates such as metal and plastic, especially suitable for power supply casings, sensor packaging, and control module bonding and sealing.
02 | PUR 1635: Strong flame retardant, strong insulation, providing high safety level protection for electronic plastic shells
PUR 1635 is a two-component polyurethane material specially designed for electronic sealing and flame retardant scenarios. After curing, it appears light yellow and transparent, with more comprehensive protective performance.
Core advantages and highlights: - V-0 level flame retardant
Meets UL94 V-0 flame retardant testing, providing higher safety in scenarios such as power controllers, transformers, and induction coils. - Low water absorption and outstanding weather resistance
After curing, it hardly absorbs water, is resistant to moisture and aging, and is very suitable for outdoor or long-term high humidity environments. - Stable deep curing performance
Low heat release during curing, without stress concentration; The shrinkage rate is extremely small, suitable for applications that require high dimensional stability. - Reliable electrical insulation
Stable insulation performance, suitable for use in PCB modules, wire harness interfaces, sensor internal encapsulation, and other scenarios. - Strong adhesion, compatible with multiple materials
The bonding of ABS, PC and other plastics still maintains good performance, ensuring that the plastic shell structure does not fall off or become sticky.
Why is ABS/PC plastic parts more suitable for choosing polyurethane?
The characteristics of ABS and PC determine that they have higher requirements for adhesives:
ABS: Good toughness but prone to stress cracking
PC: Transparent but prone to whitening, sensitive to solvents
Both have high coefficients of thermal expansion and are prone to adhesive loosening due to temperature changes
Polyurethane materials have versatile properties such as flexibility, low modulus, aging resistance, waterproofing, and electrical insulation, which can effectively solve:
✔ Can’t stick firmly
✔ Cracking caused by thermal expansion and contraction
✔ Moisture erosion
✔ long-term aging
✔ Excessive structural stress
Therefore, whether it is structural bonding or internal sealing protection, PUR 1672 A/B and PUR 1635 can provide truly long-lasting and stable solutions.
04 | Typical Application Scenarios
ABS/PC plastic shell bonding and sealing
Waterproof and moisture-proof sealing of communication equipment
Control power supply, transformer sealing protection
Packaging of ignition controller and power adapter module
Adhesive and filling of electronic sensor structure
Electronic components that require flame retardancy (such as PUR 1635)
Both products are suitable for automated glue filling lines or manual operations, with a wide process window and strong adaptability to production environments.
05 | Professional protection, starting from material selection
Safety, stability, and reliability are key indicators for bonding and packaging electronic components.
PUR 1672 A/B and PUR 1635 provide a more stable and durable solution for plastic structural components with excellent material stability, excellent bonding performance, and comprehensive environmental protection capabilities.
If you are looking for adhesive materials, potting materials, or flame retardant protective materials for ABS/PC plastic parts, these two will be your preferred options.
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