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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