Epoxy resin adhesive

IntroductionEpoxy Resin Adhesives: Properties and ApplicationsTable 1: Key Properties of Epoxy

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Introduction

Epoxy Resin Adhesives: Properties and Applications

Table 1: Key Properties of Epoxy Resin Adhesives

Property	Typical Value	Significance
Viscosity	500-50.000 cP	Determines application method
Pot Life	5 min – 24 hrs	Working time before curing
Cure Time	30 min – 7 days	Full strength development
Tensile Strength	20-50 MPa	Structural bonding capability
Service Temperature	-40°C to 150°C	Thermal stability range

Table 2: Comparison of Epoxy Adhesive Types

Type	Cure Mechanism	Advantages	Limitations
One-Part	Heat-activated	No mixing, consistent quality	Requires oven cure
Two-Part	Room/heat cure	Versatile, fast curing	Mixing required
Structural Film	Heat/pressure	High strength, uniform thickness	Special equipment needed
Flexible	Room temp cure	Impact resistant	Lower strength
Conductive	Room/heat cure	EMI shielding	Higher cost

Table 3: Common Applications

Industry	Application	Key Requirement
Automotive	Body panel bonding	Crash resistance
Aerospace	Composite joining	Lightweight strength
Electronics	Component attachment	Thermal/electrical conductivity
Construction	Concrete repair	Weather resistance
Marine	Hull repairs	Water resistance

Table 4: Surface Preparation Methods

Substrate	Preparation	Bond Strength Improvement
Metals	Solvent clean + abrasion	300-400%
Plastics	Plasma treatment	200-300%
Composites	Peel ply removal	150-200%
Concrete	Acid etching	250-350%
Glass	Silane primer	400-500%

Table 5: Performance Testing Standards

Test	Standard	Typical Value
Lap Shear	ASTM D1002	15-30 MPa
Peel Strength	ASTM D1876	5-15 N/mm
Impact Resistance	ASTM D950	15-30 J/m
Thermal Cycling	MIL-STD-883	500 cycles
Salt Spray	ASTM B117	1000+ hours

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