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Breathable Reactive Hot Melt Adhesives
for Textile Lamination
Lee PolanceProduct Director
RISE 2013, Denver, COOct 2, 2013
H.B. Fuller Company A leading global provider for adhesives and sealants
with 125 years history Corporate headquarters in St. Paul, Minnesota with
direct presence in 30 countries Focus on perfecting adhesives to
improve our customer’s Product Performance, Productivity and Total Cost
Key markets in Packaging,Hygiene, Durable Assembly(Automotive, Filtration, Textile, Electronics) Building Construction
2012 net revenue of $1.9 Billion
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Agenda
Technical Textile Market OverviewMarket Segments Applications where breathability is desired Technical Textile Value Chain Breathability Comparison
Breathable Reactive Hot Melt Technology Reactive Hot Melt AdhesiveMVTR of Reactive Hot Melts Adhesive Formulation Design and Applications
Summary
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TECHNICAL TEXTILE MARKET OVERVIEW
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The global technical textile market is expected to reach USD 160 billion by 2018, driven by demand from emerging markets
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USD 130- 135 billion
Hometech, 17.3%
Mobiltech, 14.5%
Indutech, 11.2%
Clothtech, 10.6%
Sporttech, 7.3%
Medtech, 6.4%
Protech, 3.3%
Buildtech, 6.70%
Agrotech, 4.20%
Packtech , 8%
Others, 10.0%
Technical Textile Market – By Segments (2012)
Source: 1. Culrav 2. Texture 3. CSIRO; EESC; NordFrance
Leisure WearFashionLingerie
Sports & Active WearOutdoor Wear
Contract & Work WearMedical Garment
Applications: Breathability is desired
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FabricNatural fibersRegenerated fibersSynthetic polymers
FoamAliphatic PUAromatic PU
FabricDWR treated
MembraneTPUPTFEPolyester
FabricDWR treated
Non‐wovenMembrane
Technical Textile Value Chain
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Source: David Rigby Associates
Many innovations in materials and processes to improve breathability and waterproofing of materials, e.g. ePTFE,
TPU, Polyester and DWR fabrics
Breathability of Membranes
Breathability: ability to let water vapor (or perspiration) pass through the textile lamination at a very high rate.
The rate can be quantified as water vapor transfer rate (WVTR) or moisture vapor transfer rate (MVTR)
Microporous Monolithic
Common MVTR Testing Methods
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ASTM E96 JIS L1099 ISO 15496 BS7209 ISO 11092 /ASTM F1868
•Cup method•Upright cup for water permeable fabric •Inverted cup for water impermeable fabric
•Cup method•Upright cup for water permeable fabric•Inverted cup for water impermeable fabric (for single membrane method)•Inverted cup for water permeable or water impermeable fabric (for double membrane method)
•Cup method•Inverted cup for water permeable or water impermeable fabric (double membrane method)
•Cup method•Only uprightorientation•Cup is moving on a turntable
•Sweating hot plate method Simulate sweating skin•Commonly applied to water impermeable fabric
Breathability Comparison
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0
1000
2000
3000
4000
5000
6000
7000
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Water Vap
or Flux (g/m
2 /24
h)
Mean Relative Humidity (1.0=100%RH)
ePTFE
eVent
Gore‐Tex
Membrain
Sympatex
Source: Dr. Phil Gibson, US Army Natick Soldier Research, ASTM F2298
BREATHABLE REACTIVE HOT MELT TECHNOLOGY
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Reactive Hot Melt AdhesiveOne component system100% solids – no Volatile Organic Compounds (VOCs) and no dryingExcellent temperature and environmental resistanceFormulated with breathability and hydrolysis resistance
OCNHO OH + 2
NCOOCN
H
NCO
O
H
OCN
O
NCO
Before Lamination
OCN NCO H2O NH2 CO2 (gas) ++ OCN
OCNOCN NH2 + NCO OCN
H H
NCN
O
NCO
slow
fast
After Lamination
Uses a combination of polyols to provide breathability and hydrolysis resistance
Polyol Class Typical Structure
Crystalline Polyesters
Amorphous Polyesters
Poly(Propylene Glycol)(PPG)
Poly(TetraMethylene Ether Glycol (PTMEG)
Ethylene Oxide-cappedPoly(Propylene Glycol)(EO-capped PPG)
Types of Polyols
US Patent# 6,133,400
MVTR OF REACTIVE HOT MELTS
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HBF Product MVTR (g/m2/24h)
NP2136 9
HL9588 16
HL9595 70
HL9639 200
HL9638 400Test Method: ASTM F1249‐90 Conditions: 100oF, 90±2% RHAdhesive Film Thickness: 20mil
Increasing Breathability
Increasing Washability
breathability
washability
Depending on End‐use Applications
Washability: waterproof and resistant to hydrolysis to withstand washing and sterilization cycles
Others: Fire/ flame retardant, Steam Sterilization Resistance, Adhesion to DWR fabric, UV / non-yellowing resistance
ADHESIVE FORMULATION DESIGN
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00.5
11.5
22.5
33.5
44.5
5Washability
BondingStrength
MVTR
soft hand
Price
Productibility Bonding Strength
MVTR
Soft Hand
Price
Washability
Processability
RHM Application Methods
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Gravure roller
Screen Print Slot Die
Spray Coating
Multi RollerSpiral Spray
Adhesive applications affect the breathability and soft hand of the laminates
Summary
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RHM best suited for production of high end technical textile products in Medtech, Protech and SporttechOffer excellent heat resistance / steam sterilization resistance / flame retardant characteristics
Better breathability and waterproof lamination qualitiesOther potential applications in building construction, house wrap, roofing underlayment
Increasing demand for RHM in technical textile as can be easily applied on a variety of substrates can be easily integrated into high speed production lines which require superior initial bond strength
Acknowledgement
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• Dr. Marietta Helmeke, Research Chemist at HBF, inventor of the breathable reactive hot melt
• HS Chang, Application Engineer at HBF• T.D. Wood, Rainwear: How it Works• EvaluServe, Identifying opportunities for Adhesives in Technical Textile
Industry
Thank You!
Questions?
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