Page 22 - 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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Accelerator Back Fill Buttering
A chemical that is added to a polymer This process is known as “back bedding,” The act of applying a putty or sealant
to affect a cure. which involves placing a material into compound to the flat surface of a
the gap or space between the glass and component before positioning it is known
Adhesion glazing stops. as “buttering.” This is often done, for
A substance introduced into a polymer example, when applying sealant to a
to initiate the curing process. Bead removable stop before securing the stop
A continuous strip of caulking or glazing in place.
Adhesion Buildup material is often referred to as a “bead”. Butt Joint
This process occurs within the first five
to seven days after producing two-part Bedding A joint in which the edge or face of one
and silicone sealant units. While the Setting a glass or insulating glass panel member is separated from and sealed
sealant may appear to have cured within into a sealing compound. to the edge or face of another member
three hours, it does not reach maximum without any overlap is referred to as a
adhesion at this stage. However, after the Blend “butt joint”.
initial curing, the adhesion is sufficient A physical combination of Silica Gel and
to move the unit for further fabrication 4-A Molecular Sieve, typically assumed Butyl Rubber
or packaging for shipment. If thorough to be a 50-50 mixture by weight for the A copolymer composed of 98% Butylene
testing is required, a full seven days purposes of this manual. and 2% Isoprene is known for its
are necessary for the sealant to reach properties as a sealant. It exhibits low
its optimal performance and maximum Bond recovery and a slow curing process, but it
adhesion levels. Furthermore, freshly offers good elongation characteristics.
mixed sealant adheres better to the The connection or bonding that occurs at
surface compared to material that has the boundary between two substrates is Capillary Attraction
exceeded its application life. To achieve commonly referred to as “adhesion”. The force of adhesion between a solid
the best results, ensure that properly and a liquid due to capillary attraction
mixed sealant is applied to clean, dry glass Breather Tube is commonly referred to as “capillary
and spacers that are free of oil residues. A narrow tube with a diameter of .030 adhesion”.
inches (.76 mm), inserted into the spacer
Adhesive through the perimeter wall. Its purpose Capillary Tube
A material that can bond two separate is to balance the air pressure within the A capillary tube, with a very small diameter
surfaces together through adhesion, often unit during shipping when traveling at of .021 inches (.533 mm) I.D. is inserted
used in the sealing or binding process. varying elevations, particularly at altitudes into the perimeter wall of the spacer. Its
exceeding 5,000 feet. Please note primary function is to balance the air
Adhesive Failure that breather tubes should be crimped pressure within the unit during shipping
The type of failure characterized by the and sealed upon reaching their final when traveling across varying elevations,
destination.
adhesive or sealant pulling loose from particularly at altitudes exceeding 5,000
the substrate. feet. It’s important to note that while
British Thermal Unit (BTU) crimping and sealing the capillary tubes at
Adsorbent Measures the amount of heat that passes the final destination is optional, it is not a
A substance with the ability or inclination through glazing materials, such as window requirement.
glass. It is used to indicate how much
to adsorb moisture. It is also commonly heat is gained or lost through the glass.
known as a desiccant. Catalyst
This measurement helps in evaluating the
energy efficiency of windows and glass An activator is used to initiate the curing
Adsorption facades, crucial for designing buildings or setting process of a two-part material.
The attachment of gas or liquid atoms that require less energy for heating or
or molecules to the surface of another cooling. A lower BTU transfer through Caulk
substance, which is referred to as glass indicates better insulation properties A substance used to fill gaps or voids
the adsorbent. and higher energy efficiency. around panels, windows, doors, and
similar structures is commonly referred
to as “caulking” or “sealant”.

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