Glass Alliance

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Glass Alliance Operating WW
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• Sales and distribution World Wide
• Production in Italy, Belgium, Canada and China
• Thiover PS sealant
• Poliver PU sealant
• Butylver primary butyl sealant
• Hotver2000
• Back mirror paint
• Roof paint

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• Production in Italy and Poland
• BENDTECH Aluminium profiles
• gt 350 million meter
• Georgian bars
• Double faced profiles

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• Warm edge spacers
• - CHROMATECH
• - CHROMATECH plus
• - CHROMATECH ultra
• Steel Spacers
• gt 50 million meter
• 10 production lines - and still growing

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Warm Edge in all modern windows
Why Warm Edge?
Condensation effect on room side and CO2
emission caused by cold-bridge CAN be reduced!
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CHROMATECH
The safe traditional solution

• Compatible standard shape (height 6.5 mm)
• Material thickness 0.18 mm
• Stainless steel with low thermal conductivity
  15.0 W/(mK)
• Laser welding seam facing to cavity
• Calibrated perforation holes
• Can be delivered painted in any colour
• Cavities
• 8, 10, 12, 14, 15, 16, 18, 20, 24 mm

• ISO 9001, 2000
• EN 1279-2, -3 -6
• CEKAL

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CHROMATECH plus
The safe optimized solution

• Reduced wall thickness 0,15 mm
• Profile height 7 mm
• Stainless steel with low thermal conductivity
  15.0 W/(mK)
• Shape optimized for bending
• Corrugated front and back surface
• Side welding seam design
• Calibrated perforation holes
• Can be delivered painted in any colour
• Cavities
• 8, 10, 12, 14, 15,16, 18, 20 mm

• ISO 9001, 2000
• EN 1279-2, -3 -6
• CEKAL

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CHROMATECH ultra
The safe ultimate solution

• Stainless Steel back with low thermal
  conductivity 15.0 W/(mK)
• combined with a polycarbonate top 0,24 W/(mK)
• Profile height 7 mm
• Shape optimized for bending
• Corrugated back and smooth surface
• Three colors available
• Light Grey RAL 7035
• Window Grey RAL 7040
• Black RAL 9004
• Cavities
• 10, 12, 14, 15, 16, 18, 20 mm

• ISO 9001, 2000
• EN 1279-2, -3 -6
• CEKAL in progress

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Overall Technical Criteria

• Selecting the
• WARM EDGE
• Spacer System

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What is required from Glass solutions ?

• How are they achieved ?
• Glass Coatings
• Gas filling
• Increased glass thickness
• Triple Glazing
• laminated glass
• Georgian bars
• Use of Warm Edge spacer

• Future
• Higher Glass weight
• Increased temperature in IG

The WARM EDGE spacer MUST comply with the
required solutions!
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Edge Construction
The Edge Construction must secure the required
IG-unit quality on all points!
Warm Edge Spacer with Gas- / Damp barrier
Dessicant Quantity Activity Control
Primary Seal Butyle
Double sealing

Secondary Sealant Polysulphide Polyurethane -
Silicone

• This applies also for the WARM EDGE spacer

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SYSTEM EVALUATION

• The PSI value is not the only criteria for a
  WARM EDGE system!

• Questions CHECKLIST ?
• Can the spacer be used on all IG units or do you
  need several ?
• Façade Solar Protection Large units
• Georgian Bar application
• Triple Units
• Psi Value
• Construction of IG unit possible risks ?
• Damp Gas barrier ?
• Machine Equipment
• Stability on Large Frames
• Productivity
• Bend ability - Quality
• Shaped Frames
• Colors
• Compatibility with Sealants (PS, PU, Silicone and
  Butyle)
• Compatibility with Sealants by DIRECT BONDING in
  Window Frames
• Cost of spacer and manufacturing
• Lifetime and warranty

Rating
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Warm Edge spacer bars
Spacer CHROMATECH plus CHROMATECH CHROMATECH ultra Swissspacer TGI Thermix TXN SS Triseal TPS

Supplier Rolltech Rolltech Rolltech Saint Gobain Technoform Ensinger Edgetech Various Sealant Supplier
Spacer bar system Homogeneous Stainless steel Homogeneous Stainless steel Stainless steel with PC bridge Composit - plastic Composit - plastic Composit - plastic Silicone foam Thermoplastic
Insulating Material SST 0,15 mm SST 0,18 mm Polycarbonate Polycarbonate / fibreglass Polypropylene Polypropylene / fibreglass armed Silicone with desiccant implemented Isobutylen / desiccant
Damp barrier SST 0,15 mm SST 0,18 mm SST 0,10 mm SST 0.01mm / Alum Foil SST 0,10 mm SST 0,10 mm Multilayer plastic spray Isobutylen
Production technology Roll forming Roll forming roll forming connect with polycarbonat bridge Extruded separate foil application SST/PP Co-extrusion SST/PP-fibreglass co-extrusion Extruded separate Foil Acrylic glue application Lenhardt Robot application from drums
PSI value W/mK PVC frame 0,051 0,051 0,041 0,034 - 0,045 0,044 0,041 0,035 0,039
Remarks Corrugated austenitic SST profile Traditional austenitic SST standard profile Austenitic SST shell PC Top Variations with different damp barrier foils diff. Psi values Ferritic steel PP PP Fiberglas Glued Moisture barrier Triseal with Butyl barrier - diff. Moisture barrier Thermoplastic spacer
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U-value PSI value
What effect will the PSI values have on the Uw
value?
Spacer Type PSI Exact U-value Rounded acc. to EN 10077
Aluminium spacer 0.085 1.368 1.4
Stainless Steel 0.15 0.050 1.270 1.3
Extruded PP spacer with Ferritic Stainless 0.044 1.254 1.3
Austenitic Stainless steel spacer with PC top 0.041 1.245 1.2
Silicone spacer automatic application 0.035 1.229 1.2
Example Wood frame Uf 1.2 Glass Ug 1.1 (940 x
1048 mm)
The Ug-value difference between air and Gas
filled is app. 0,3
Conclusion Ability to maintain gas filling over
time, effects Uw more than PSI value of spacer.
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Inside Condensation

• Fungus and visual inconvenience
• Bad indoor environment
• Frame damage by moisture

• The spacers thermal conductivity effects the
  level of condensation !

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Inside Condensation
Metal frame Uf 2,05 W/m2K. Inside 20o C, 50
RH, dew point 9,3o C
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Sealants

• Secondary sealants are not water tight!

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Sealants

• Silicone is not gas tight!

Conclusion Spacer and primary seal must be
tight!
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Damp Gas Barrier

• Comments
• Tight
• - Limited scratch resistance
• - High thermal conductivity 160 W/mK
• Tight, flexible and safe solution
• Austenitic Lambda 15 W/mK
• - Ferritic Lambda 25 W/mK
• Lowest thermal conductivity 0,20 W/mK
• - Proof of tightness must be verified

• Material
• Aluminium Foil
• Stainless Steel
• Plastic Foil

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Soft Spacers

• Advantages
• Lowest thermal conductivity 0,20 0,25 W/mK
• Can be applied automatically (High investment)
• Disadvantages
• Lowest content of Desiccant
• Proof of tightness must be verified
• Stability and control can be difficult

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Thermal Length Expansion
Spacer Material Thermal Expansion A 10-6 K-1 Expansion at 60K 2000 mm IG-Unit edge length Difference in Expansion Relative to glass
Floatglass reference 9 1.08  
Steel Spacer 12 1.44 0.36
Stainless Steel 16 1.92 0.84
Aluminium 24 2.88 1.80
Polycarbonate (PC) 65 7.80 6.72
Polypropylene (PP) 150 18.00 16.92
Conclusion Plastics spacers have higher
elongation variance gt the butyle barrier and
sealant is further stressed under pressure!
Note The thermal expansion for PC and PP are
for the pure material, not the expansion of a
spacer, which will be less.
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Glass Fibers in Plastic Spacer

• Advantage
• The high elongation in the plastic can be reduced
• Increase of the linear stiffness
• Disadvantage
• The bending possibilities are reduced.
• Spacer will be more brittle in relation to the
  content.
• Risk of cracking ?

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Thermal Width Expansion
Spacer material Square Expansion Spacer Expansion Square Expansion
  specific by 76K DIFFERENCE
  A 10-6 K-1 mm
     
Steel Spacer 12 0,015  Reference
Stainless Steel 16 0,019 0,005
Aluminium 24 0,029 0,015
Polycarbonate PC 65 0,079 0,064
Polypropylene PP 150 0,182 0,168
Spacer Width Expansion
The width expansion of Stainless Steel is close
to ZERO and quite limited by PC . Polypropylene
expand by an EN 1279 Climate test app. 0.2 mm!
Conclusion The butyle barrier is further
stressed under pressure!
Note The thermal expansion for PC and PP are
for the pure material, not the expansion of a
spacer, which will be less.
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Evaluation and Choice of plastic Material
Material Thermal w/mK Thermal expansion Basic UV Stability E-module N/mm2 Surface Appearance Basic Antistatic properties Price Level Index
PE 0.45 200 2 900 3 2 100
PP 0.20 150 2 1270 3 2 108
ABS 0.18 -- 3 2200 5 4 133
PVC 0.15 80 5 3000 5 4 60
PC 0.21 65 4 2200 5 5 220
PA6 0.30 80 2 3500 4 3 115
Score from 1 (not so suitable) to 5 (very good)
Conclusion Price and quality go hand in hand!
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Moisture absorption

• Important demands for optimal spacers
• Spacer must have large area for desiccant
• Spacer must be easy to fill both flow and
  drilling
• Spacer should have small calibrated perforation
  holes

Spacer type Desiccant per m Liquid absorption
Stainless Steel Spacer 70 g 14 ml
Optimal SST / PC spacer 60 g 12 ml
Typical SST / PP spacer 50 g 10 ml
Preloaded spacer 20 g 4 ml
Typical average values for 16 mm spacer under
optimal conditions
Conclusion The best spacers can absorb gt 3 X
more moisture
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Moisture absorption

• Desiccant that has been exposed to air,
• absorbs considerably less humidity

Normal absorption for 12 mm spacer related to
level of perforation under optimal
conditions Typical spacer with ordinary
perforation MUST be installed before 8 hrs Spacer
with calibrated perforation holes can still be
used 24 hrs after desiccant filing
Conclusion Calibrated spacers increases IG life
time
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IG Bonding in the Window

• The compatibility of the different plastic
  materials need to be checked very carefully!

Related Products

• Window
• Gasket for Window
• Glazing brick / bonding
• PVB foil
• Bonding Seal
• IG Secondary Sealing
• IG Primary Sealing
• Plastic Spacer

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Spacer- Workability

• Demands
• Stable frames High length stability
• Rigid corners - increase the stability of the
  frame
• Minimal expansion in the corner area (max 0.3 mm
  to the spacer width)
• Spacer able to be bent both prefilled and empty
• Bendable in odd shapes
• Adhesion to sealants
• Compatibility to Sealants
• Easy desiccant filling
• Few connections for tighter frame

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Gas Silicone behaviour
Mix like hot Coffee and Sugar !
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Façade Glazing

• Facts to consider
• Large Sizes Risk for Thermal Expansion !
• Silicone as Secondary Sealant !

• Requires tight frame with minimal Thermal
  expansion
• Primary Seal Double Quantity Butyle !

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WARM EDGE
- for the modern and green window

• On small windows
• PSI value on spacer has high effect
• Elongation variation has low influence

• On large units
• PSI value on spacer has less effect
• Elongation variation has high influence

• The right spacer for the right application !

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Selection of Warm Edge Spacer
Conclusion More than the Psi value has to be
considered !
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Thank You for Your Attention
QUESTIONS? Contact VETRIM A.LEPICH_at_VETRIM.PL