《Coating Materials》Hot Melt Material

Materials Water based Latices dispersion Organic Solvents solutions Hot melts Block Copolymers 100% Solids Acrylates Thermal cured Natural rubber UV Cured Moisture cured 202l/1/21 3M Confidential -ESTC Coating

2021/1/21 3M Confidential - ESTC Coating Group 1 Materials: Hot melts Block Copolymers Acrylates Natural Rubber Water based Latices dispersion solutions 100% Solids Thermal Cured UV Cured Moisture Cured Organic Solvents

Comparison of Typical Materials Material Molecular Viscosity Typical Type weight %o solids Solvent Dependent on 5-40% molecular weigh cht and solids Water High L ow only 45-65% dependent on solids Hot melt Medium -High High( solid at 100% room temp) 100% solids Low-typically Low-water like 100 monomers and oligomers 202l/1/21 3M Confidential -ESTC Coating 2

2021/1/21 3M Confidential - ESTC Coating Group 2 Comparison of Typical Materials Material Type Molecular weight Viscosity Typical % solids Solvent High Dependent on molecular weight and % solids 25-40% Water High Low only dependent on % solids 45-65 % Hot melt Medium - High High (solid at room temp) 100% 100 % solids Low – typically monomers and oligomers Low – water like 100 %

Hot melt material Hot melt applications High Volume adhesives BoX Sealing Tape Dia laper lape abrasives 202l/1/21 3M Confidential -ESTC Coating

2021/1/21 3M Confidential - ESTC Coating Group 3 Hot Melt Material Hot Melt Applications – High Volume Adhesives • Box Sealing Tape • Diaper Tape • Abrasives

HM- Block Copolymer PSA's Isoprene backbone Styrene Segment Domains Styrene Isoprene Styrene S-S S-L S-B-S S-EB-S Association of styrene Segments .Provides cohesive Strength(Shear) . Disassociation a 100C allows Flow Rubbery segment Provides tack 202l/1/21 3M Confidential -ESTC Coating

2021/1/21 3M Confidential - ESTC Coating Group 4 Isoprene Backbone Styrene Isoprene Styrene Styrene Segment Domains S-I-S, S-I, S-B-S, S-EB-S Association of Styrene Segments •Provides Cohesive Strength (Shear) •Disassociation @ 100C allows Flow Rubbery Segment Provides Tack HM- Block Copolymer PSA’s

Acrylate PSas Random copolymer of loa and aa or maa Cohesive Strength( Shear) .Entanglements(High MW) Association of Acid groups Reduction of Inter -Molecular motion Extends Rubbery plateau Post Coating Cross-Linking ! 202l/1/21 3M Confidential -ESTC Coating Group

2021/1/21 3M Confidential - ESTC Coating Group 5 Random Copolymer of IOA and AA or MAA Cohesive Strength (Shear) •Entanglements (High MW) •Association of Acid Groups Reduction of Inter-Molecular Motion Extends Rubbery Plateau Post Coating Cross-Linking !! Acrylate PSA’s

Other hotmelt Psas Natural rubber psa poly a-Olefins psa blends 202l/1/21 3M Confidential -ESTC Coating

2021/1/21 3M Confidential - ESTC Coating Group 6 •Natural Rubber PSA •Poly a-Olefins •PSA Blends Other Hotmelt PSA’s

Kraton PSA Compounding Antioxidant Pelletized Rato Flakes of tackifier Fed from Rail car (e.g. Wingtack plus) Gaylord Melter Gear Weigh Pu mp Feed Compounding Gear Dump Static Extruder Pump Screen Pack aNe Mixer To Coating gallon Di 202l/1/21 3M Confidential -ESTC Coating

2021/1/21 3M Confidential - ESTC Coating Group 7 Gear Pump Compounding Extruder Pelletized Kraton Fed from Rail Car or Gaylord Weigh Feed Flakes of Tackifier (e.g. Wingtack plus) Oil Gear Pump Gear Pumps Static Mixer Dump Valve Screen Pack To Coating Die or 55 gallon Drums Antioxidant Grid Melter Kraton PSA Compounding

Hot Melt Coating Methods Draw methods Contact Methods Coated Film HMPSA Cast rol ▲ Backup rol Nip roll Contact Die Drop Die Roll Coating Rock Die Extrusion Melt blown R d rotary rod Die e 202l/1/21 3M Confidential -ESTC Coating 8

2021/1/21 3M Confidential - ESTC Coating Group 8 Draw Methods Contact Methods Rock Die Rotary Rod Die Roll Coating Melt Blown Drop Die Extrusion Contact Die Backup Roll Nip Roll Cast Roll Coated Film HMPSA Hot Melt Coating Methods

The real difference Contact Coating: Solid Boundaries, Shear Draw Methods: Free Surfaces. Extension 202l/1/21 3M Confidential -ESTC Coating

2021/1/21 3M Confidential - ESTC Coating Group 9 Contact Coating: Solid Boundaries, Shear Draw Methods: Free Surfaces, Extension The Real Difference

Drop Die Coating Schematic Compounding Gear Static Extruder Pump Screen valve Ixer Pack Coating Die Coated film to Slitter and winder HMPSA Curtain Cast roll (Plasma Coat) Nip rol (silicone rubber) Liner unwind 202l/1/21 3M Confidential -ESTC Coating

2021/1/21 3M Confidential - ESTC Coating Group 10 Gear Pump Compounding Extruder Static Mixer Dump Screen Valve Pack Coated Film to Slitter and Winder Liner Unwind Cast Roll (Plasma Coat) Nip Roll (silicone rubber) HMPSA Curtain Coating Die Drop Die Coating Schematic