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UV curing adhesives use ultraviolet (UV) light or other radiation sources to initiate curing and form a permanent bond without heating. They are compatible with substrates made of ceramic, composite material, concrete, fabric, glass, metal, paper, plastic, rubber, or wood. UV curing adhesives use various chemical systems, most of which are polymer-based. Choices include acrylic, epoxy (EP) polybutadiene, polyester, silicone, styrene copolymer, and vinyl. Some UV curing adhesives contain additional modifiers such as fillers, pigments, or chopped fiber reinforcements. Others contain solvent-based adhesive resins which use a volatile organic compound (VOC) to thin or alter viscosity. Typically, solvent-based UV curing adhesives pose greater environmental or regulatory issues.  

Selecting UV curing adhesives requires an analysis of processing and physical properties, thermal properties, and mechanical properties. Processing and physical properties include gap fill, the spacing or gap between the substrate and adhesive or sealant; and viscosity, a measurement of a fluid’s resistance to flow. Use temperature, thermal conductivity, and coefficient of thermal expansion (CTE) are important thermal properties to consider. Use temperature is the range of temperatures to which products can be exposed without the degradation of structural or other required end-use properties. Thermal conductivity is the linear heat transfer per unit area through a material for a given applied temperature gradient.   CFE is the amount of linear expansion or shrinkage that occurs in UV curing adhesives with a change in temperature. 

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Products & Services Related to UV Curing Adhesives
Conductive Adhesives and Compounds
Conductive adhesives and compounds provide an electrically and/or thermally conductive path between components.
Conformal Coatings
Conformal coatings encapsulate circuit boards and their electronic components in order to prevent the ingress of moisture, fungus, dust and other environmental contaminants.
Epoxy Adhesives
Epoxy adhesives are chemical compounds for joining components. They require clean surfaces and are valued for their toughness and resistance to chemical and environmental damage.
Gel Elastomers
Gel elastomers are highly viscoelastic polymer gel materials that have excellent shock absorption and damping characteristics. They are available in a variety of material types and grades.
Pressure Sensitive Adhesives (PSA) and Contact Adhesives
Pressure sensitive adhesives (PSA) and contact adhesives adhere to most surfaces with very slight pressure. They are available in solvent and latex or water based forms.
Silicone Adhesives and Sealants
Silicone adhesives and silicone sealants have a high degree of flexibility and very high temperature resistance.
Thermoplastics and Thermoplastic Materials
Thermoplastics and thermoplastic materials soften when heated and harden when cooled. They can withstand many heating and cooling cycles and are often suitable for recycling.

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Engineering Web: UV Curing Adhesives
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UV Adhesives, Sealants, Encapsulants, Coatings
UV Curing Adhesives and Specialty Epoxies for Micro Electronics
See Jenton International UV Information
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RTV Silicone Sealants, High Temperature Adhesives and Sealants...
? Low odour, non acid neutral curing system ? Outstanding adhesion to glass & silicone rubber ? Resistant to oils, UV & ozone and most chemicals ?
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