Page 26 - WEB-I3 Insulating Glass Fabrication Supplies and Equipment

SECTION 3 FHC INSULATING GLASS FABRICATION, SUPPLIES AND EQUIPMENT
FHC IG Terms and Definitions
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Stretch Thixotropic Weeping
Sealant elongation refers to its ability to Non-sag material that keeps its shape Extrusion or expulsion of solvents or oils.
stretch or become longer. without drooping even on vertical
surfaces during curing, thanks to Work Life
Substrate thixotropy. Work life refers to the duration during
The area upon which an adhesive or which a sealant can be readily applied
sealant is applied for attachment. Toe Bead after mixing, indicating the available
A bead of sealant applied where the working time.
Sweat glass stop meets the horizontal frame
Condensation resulting from the contact for the lite. ABBREVIATIONS
between warm, moist air and cold glass or
metal. Tooling AAMA
To press material against the joint’s American Architectural Manufacturer’s
Tear Strength backing and surfaces for a polished Association
The force necessary to separate a sealant appearance.
sample, measured in pounds. BTU
Ultraviolet Light (UV) British Thermal Unit
Tensile Strength Segment of the light spectrum; CRF

Cohesive strength, measured in psi UV rays can trigger chemical
(pounds per square inch), indicates a changes in rubber materials. Condensation Resistance Factor
material’s resistance to stretching forces.
Unit FGMA
Thermal Back The term typically used to refer to Flat Glass Marketing Association
A material with low thermal conductivity a single “lite” of insulating glass. IG
used to separate exterior and interior
materials, creating a thermal break to Urethane Insulating Glass
prevent heat flow or transfer. Polymers with diverse flexibility, formed
by diisocyanate and hydroxyl reactions. IGCC
Thermal Conductance Insulating Glass Certification Council
(C Value) U-Value IGMA
The C-value for heat conductance through U-Values denote the comprehensive Insulating Glass Manufaturer’s Alliance
a material thickness is calculated from its rate of heat transfer from interior to
K-factor. exterior air through a heat barrier. MSD
Lower values are indicative of enhanced
Thermal Conductance insulation performance. Molecular Sieve Desiccant
(K Factor) Viscosity MVTR
Heat transfer per unit area over time in a Viscosity measures a material’s resistance Molecular Vapor Transfer Rate
homogeneous material is called heat flux. to flow. The higher the viscosity, the
A lower value indicates lower conductivity. thicker and more thixotropic the material NGA
becomes in consistency. National Glass Association
Thermal Conductance
(U- Factor) Vulcanization PIB
Heat flux is the heat transfer per unit area Enhancing rubber’s elasticity through Polyisobutylene
over time in a homogeneous material. A vulcanization: treating with sulfur
lower value indicates lower conductivity. and heat. RH
Relative Humidity
Thermoplastic Warm Edge Technology UV
A substance capable of being repeatedly “Warm Edge” refers to preventing
softened through heating, thermoplastics condensation between the glass unit and Ultraviolet
typically exhibit minimal to no chemical the window frame.
cross-linking.
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