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Single/two-component epoxy adhesive

Epoxy adhesive is a structural adhesive with high bonding strength. Suitable for bonding various substrates, especially with high bonding strength to metal materials.

PropertySingle-Component EpoxyTwo-Component Epoxy
Composition Single resin with latent curing agent. Resin + separate curing agent (e.g., polyamide).
Curing Method Heat-activated (e.g., 80–180°C). Mixing resin and curing agent; room temp. or heat-cured.
Key Applications Fast-production electronics, low-temp processes, consumer goods. High-strength bonding (metals, composites), aerospace, automotive.
Advantages Simplified storage, rapid curing in heat, no mixing required. Superior adhesion, chemical resistance, adjustable cure speed.
Limitations Brittle when cured, limited shelf life (requires refrigeration). Shorter pot life after mixing, requires precise mixing ratio.

Compared to other types of adhesives, epoxy adhesiveshave better resistance to high temperatures and chemical corrosion, low shrinkage and cohesive strength, and are widely used in the fields of electronics, automotive, industry, and aviation.

Epoxy adhesives are divided into two types:single component and two-component. Single component epoxy adhesives can be divided into low-temperature curing epoxy, medium temperature curing epoxy, and high-temperature curing epoxy according to different curing temperatures. Low temperature curing epoxy is widely used in consumer electronics products. Its advantage is that the curing temperature is as low as 80 ℃ and the curing time can be controlled within 15-30 minutes. It can effectively meet the demand for fast production pace. Compared to single component products, two-component epoxy adhesives have a wider range of application scenarios and lower storage requirements. Typically, two-component epoxy does not require low-temperature storage.

At present,Moutainchem Electronics’ single component epoxy has mature applications in industries such as magnet bonding, motor bonding, VCM motor bonding, camera module bonding, and optical communication.

Epoxy Adhesive Systems Technical Summary

PropertySingle-ComponentTwo-Component
Composition Pre-mixed resin/hardener Separate resin & hardener
Curing Mechanism Heat-activated Chemical reaction at RT or heat-accelerated
Pot Life N/A (pre-mixed) 5 min – 24 hrs (varies by formulation)
Cure Time 15-60 min @ 120-180°C 2 hrs – 7 days (RT cure)
Typical Viscosity 10.000-50.000 cP 5.000-30.000 cP (resin)
Storage Conditions -20°C to 5°C (uncured) RT (separate components)
Shelf Life 3-12 months 12-24 months

Performance Characteristics

ParameterBoth Systems
Tensile Strength 20-50 MPa
Shear Strength 15-40 MPa
Temperature Resistance -40°C to +150°C (standard)
Chemical Resistance Excellent to oils, solvents
Shrinkage <1%

Application Comparison

FeatureSingle-ComponentTwo-Component
Ease of Use Simple application Requires mixing
Equipment Needed Heating oven Mixing tools
Best For High-volume production Custom applications
Bondable Substrates Metals, ceramics Metals, plastics, composites

Safety & Handling

AspectBoth Systems
Skin Contact Wear nitrile gloves
Eye Protection Safety goggles required
Ventilation Adequate airflow needed
Cured Material Non-hazardous

Note:Single-component systems offer processing efficiency while two-component systems provide formulation flexibility. Selection depends on production requirements, substrate types, and performance needs.


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