Case and Carton Sealing: Hot melt Adhesive Solutions

Transcription

1 Case and Carton Sealing: Hot melt Adhesive Solutions STICK INGTO INNOV ATION Imagine what s next

2 Hot Melt Adhesives for Case and Carton Sealing A vast range of businesses and individuals from global brand owners to friends and families shipping gifts and other packages depend on securely sealed cases, cartons, and boxes to help maintain the integrity of their delivered goods. Likewise, hot melt adhesives (HMAs) have long been a trusted solution for case and carton sealing. Now, whether you re producing HMAs for low or conventional temperature case/carton sealing applications, there s an GA Polyolefin Elastomer designed to help meet and potentially exceed your needs. AFFINITY GA Polyolefin Elastomers (POEs) from Dow offer performance, processing, and end-user advantages difficult to achieve with traditional HMA formulations, such as those based on ethylene vinyl acetate (EVA): More powerful bonds Better mileage (more boxes sealed per pound of adhesive) Broader temperature range performance Convenient processing with - Longer pot life - Virtually no char, discoloration, or odor - Less plugging and clogging - Less downtime and maintenance expense vs. HMAs based on EVA Improved packaging economy lower total cost of ownership Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow 1

3 AFFINITY GA Polyolefin Elastomers Improved Adhesive Performance Hot melt adhesives formulated with GA POEs offer powerful adhesion across a wide range of temperatures and substrates. In fact, as shown in Figure 1, it typically takes several different EVA-based formulations to cover the same range as one HMA based on AFFINITY GA polymers. These Dow products also offer nearly 100-percent fiber tear at both high and low temperatures and on a variety of substrates, including hard-to-bond paper stock. In addition, HMAs formulated with AFFINITY GA POEs offer significantly better adhesion to the recycled paper tested than those formulated with EVA. Figure 1: Percent Fiber Tear of HMAs Formulated with Selected Base Polymers at Various Temperatures Fiber Tear, % GA 1950 POE EVA 1 EVA 2 Base Polymer -40 F (-40 C) 0 F (-18 C) 40 F (4 C) 120 F (49 C) 140 F (60 C) Increased Mileage Their low density and high flow compared to EVA allow AFFINITY GA POEs to produce more adhesive per pound (kg) of resin used. In addition to helping enable increased productivity, this also helps reduce overall system costs. The products strong bonding capabilities can help extend mileage even further by requiring less adhesive to produce an appropriate seal. Figure 2: Boxes Sealed Using 1 lb. (0.45 kg) of HMA Formulated with Selected Base Polymers Boxes Sealed 1,200 1,100 1, GA POE >10% Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. EVA Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow STICK INGTO INNOV ATION Imagine what s next 2

4 Broad Temperature Range HMAs formulated with GA POEs exhibit excellent performance across a wide range of temperatures. This offers value for both formulators and end users, since one AFFINITY GA-based HMA can meet bonding needs at a variety of temperatures. It also means that AFFINITY GA polymers are suitable for freezer-to-microwave packages and other applications that must tolerate a wide range of temperatures. Testing has shown peel adhesion failure temperature (PAFT) values as high as 169 F (76 C), ensuring reduced seal failure rates and expenses associated with carton/box returns. Figure 3: Service Temperature Range of HMAs Formulated with Selected Base Polymers Service Temperature, F ( C) -40 (-40) -20 (-29) 0 (-18) 20 (-7) 40 (4) 60 (16) 80 (27) 100 (38) 120 (49) 140 (60) 160 (71) 180 (82) HMA formulated with AFFINITY GA POE HMA formulated with EVA Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Improved Processing Figure 4 shows that the viscosity of AFFINITY GA Polyolefin Elastomers remains very stable at the application temperature. Along with the materials low density, this helps enable convenient, reliable application with more precise control of bead size and placement, longer pot life, less plugging and clogging, and reduced downtime/lost production. Figure 4: Viscosity Stability of HMAs Formulated with Selected Base Polymers 70 Base Polymer: 60 GA POE EVA 50 Change in Viscosity, % Hours at 350 F (177 C) Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow 3

5 Excellent Color Stability In conjunction with extended pot life, HMAs formulated with GA polymers exhibit excellent color stability versus the traditional formulations tested (see Figure 5). As a result, you can enjoy clean-running systems with virtually no char or odor. The reduced need to frequently change adhesive in the tank also contributes to lower overall cost. Food Contact Compliance AFFINITY GA POEs comply with U.S. Food and Drug Administration Food Contact Notification 424 (consult the regulations for complete details). You can also contact your Dow Elastomers representative or your nearest office (see back cover) for additional information. Lower Total Costs The performance and processing advantages of AFFINITY GA POEs help generate cost efficiencies that can help lead to significantly lower system costs. Table 1: Potential Savings for HMAs Formulated with GA POEs 10-15% mileage advantage Low product density allows more sealed containers per pound (kg) of adhesive Aggressive bonding characteristics allow for less adhesive used per application 15-25% additional cost savings Increased thermal stability typically means longer pot life and less waste Wide service temperature range enables one HMA to do the work of many Reduced downtime and maintenance time; nozzles and lines require less frequent cleaning and changing Adhesion to a wide range of substrates means reduced carrying costs and inventory Total: 25-40% overall cost savings vs. traditional HMA formulations Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Figure 5: Color Stability of HMAs Formulated at 350 F (177 C) for 144 hours with Selected Base Polymers Hot Melt Adhesive Formulated with AFFINITY GA Conventional Hot Melt Adhesive Formulated with EVA l l l l l l Hours l l l l l l Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow STICK INGTO INNOV ATION Imagine what s next 4

6 Conventional Application Temperature HMAs GA 1950 Polyolefin Elastomer helps to meet the demands of conventional application temperature hot melts (350 F [177 C]) in case and carton sealing applications such as folding carton sealing, corrugated container closure, tray forming, and pallet stabilization. Conventional temperature HMAs containing AFFINITY GA POEs offer a wide range of performance advantages depending on the tackifier chosen. For example, when formulated with hydrocarbon tackifiers and waxes, the resulting blends are very resistant to oxidation and crosslinking. As shown in Table 4, formulations produced with AFFINITY GA 1950 polymers offer excellent heat resistance, fiber tear, and PAFT performance. Table 2: Typical Properties of GA 1950 POE Property GA 1950 Density, g/cm 3 (ASTM D 792) Brookfield 350 F (177 C), cps (ASTM D 1084) 17,000 Approximate Melt Index, g/10 min (190 C, 2.16 kg weight) 500 DSC Melting Point, F ( C) 158 (70) Crystallinity, % 18 Glass Transition Temperature, F ( C) -69 (-56) Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Value is approximate; points are outside normal testing range. Dow Method. Test protocols and additional information available upon request. Table 3: Conventional Application Temperature HMA Formulations Using GA 1950 POE and Selected Tackifiers Component, wt % EASTOTAC H-130R GA 1950 EASTOTAC H-142R Experimental Tackifier Resin AFFINITY GA EASTOTAC H-130R 35.0 EASTOTAC H-142R 35.0 Experimental Tackifier Resin 40.0 Paraflint H Irganox (4) Total Data courtesy of Eastman Chemical Company. Information represents North American-grade tackifiers. Equivalent grades are available in other geographies. EASTOTAC is a trademark of Eastman Chemical Company Paraflint is a registered trademark owned by Sasol Wax Americas, Inc., Moore & Munger Inc. (4) Irganox is a trademark of Ciba Specialty Chemicals Corporation Table 4: Performance of Conventional Application Temperature HMA Formulations Using GA 1950 POE and Selected Tackifiers AFFINITY GA 1950 Property EASTOTAC EASTOTAC H-130R H-142R Experimental Tackifier Resin Avg. PAFT, F ( C) 158 (70) 169 (76) 150 (66) Avg. SAFT, F ( C) 208 (98) 204 (96) 210 (99) Avg. Heat Stress, F ( C) Full Fiber Tear, F ( C) Virgin Corrugated Fiber Tear Recycle 200 (93) 196 (91) 202 (94) 0 (-18) 0 (-18) 0 (-18) 0 (-18) 0 (-18) 0 (-18) Data courtesy of Eastman Chemical Company. Information represents North American-grade tackifiers. Equivalent grades are available in other geographies. EASTOTAC is a trademark of Eastman Chemical Company Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow 5

7 Low Application Temperature HMAs For Temperatures from F ( C) GA 1900 Polyolefin Elastomer offers a very good combination of property performance and processing for low application temperature hot melt adhesives (LATHMAs) used in case and carton sealing. Applied at temperatures from F ( C), these adhesives are typically used for folding carton sealing, corrugated container closure, tray forming, and pallet stabilization applications. The excellent adhesive properties and high flow of AFFINITY GA 1900 help make it suitable for LATHMA formulations with a variety of tackifiers (Table 6). Table 7 shows how low temperature HMA formulations containing AFFINITY GA 1900 POE offer comparable or better performance versus the commercially available LATHMA tested. Table 5: Typical Properties of GA 1900 POE Property GA 1900 Density, g/cm 3 (ASTM D 792) Brookfield 350 F (177 C), cps (ASTM D 1084) 8,200 Approximate Melt Index, g/10 min (190 C, 2.16 kg weight) 1,000 DSC Melting Point, F ( C) 154 (68) Crystallinity, % 16 Glass Transition Temperature, F ( C) -72 (-58) Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Value is approximate; points are outside normal testing range. Dow Method. Test protocols and additional information available upon request. Table 6: LATHMA Formulations Using GA 1900 POE and Selected Tackifiers Component, wt% EASTOTAC H-130R GA 1900 EASTOTAC H-142R Experimental Tackifier Resin AFFINITY GA EASTOTAC H-130R 35.0 EASTOTAC H-142R 35.0 Experimental Tackifier Resin 35.0 Paraflint H Irganox (4) Total Data courtesy of Eastman Chemical Company. Information represents North American-grade tackifiers. Equivalent grades are available in other geographies. EASTOTAC is a trademark of Eastman Chemical Company Paraflint is a registered trademark owned by Sasol Wax Americas, Inc., Moore & Munger Inc. (4) Irganox is a trademark of Ciba Specialty Chemicals Corporation Table 7: Performance of LATHMA Formulations Using GA 1900 POE and Selected Tackifiers vs. a Commercially Available LATHMA GA 1900 Property EASTOTAC EASTOTAC H-130R H-142R Experimental Tackifier Resin Commercial LATHMA Avg. PAFT, F ( C) 161 (72) 158 (70) 151 (66) 132 (56) Avg. SAFT, F ( C) 188 (87) 205 (96) 198 (92) 165 (74) Avg. Heat Stress, F ( C) 177 (81) 183 (84) 188 (87) 187 (86) Full Fiber Tear, F ( C) Virgin Corrugated Fiber Tear Recycle (-12 to -9) (-12 to -9) 20 (-7) 20 (-7) 20 (-7) 20 (-7) Data courtesy of Eastman Chemical Company. Information represents North American-grade tackifiers. Equivalent grades are available in other geographies. EASTOTAC is a trademark of Eastman Chemical Company >35 >35 Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow STICK INGTO INNOV ATION Imagine what s next 6

8 For Temperatures at or below 248 F (120 C) With the lowest viscosity of any GA polymer available from Dow, GA 1875 Polyolefin Elastomer offers an excellent choice for LATHMAs applied at or below 248 F (120 C). Table 8 lists the typical properties of this extremely high flow resin, while Table 9 shows the anticipated behavior of a selected LATHMA formulation as predicted via computer modeling. Table 8: Typical Properties of GA 1875 POE Property GA 1875 Density, g/cm 3 (ASTM D 792) Brookfield 350 F (177 C), cps (ASTM D 1084) 6,700 Approximate Melt Index, g/10 min (190 C, 2.16 kg weight) 1,250 DSC Melting Point, F ( C) 158 (70) Crystallinity, % 22 Glass Transition Temperature, F ( C) -71 (-57) Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Value is approximate; points are outside normal testing range. Dow Method. Test protocols and additional information available upon request. Table 9: Model Predicted Data for 1,000 cps Target HMA Formulation Using GA 1875 POE Polymer AFFINITY GA ,250 MI (28.7 / 40 / 31.3) 248 F (120 C), cps Softening Point, F ( C) Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. EASTOTAC is a trademark of Eastman Chemical Company Sasolwax is a registered trademark of Sasol LTD. Application Temperature, F ( C) PAFT, F ( C) 1,000 cps Target HMA (Polymer / EASTOTAC H-115 / Sasolwax H1 Wax) SAFT, F ( C) Passing Heat Stress, F ( C) 1, (109.7) 248 (120) (53.5) (92.5) (50.5) Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow 7

9 HMAs for Hard-to-Bond Substrates GA 1000R Polyolefin Elastomer addresses the growing demand for HMAs with excellent adhesion to hardto-bond substrates. This maleic anhydride (MAH) grafted polymer accentuates the excellent adhesive properties inherent in all AFFINITY GA resins, allowing HMAs formulated with AFFINITY GA 1000R POE to take on some of the most difficult bonding challenges faced across the value chain: Low surface energy substrates, such as polyethylene (PE) or polypropylene (PP) Low porosity or low surface roughness substrates, such as paper or cardboard that s coated for functionality or aesthetics Substrates with short fiber length due to high content of recycled material Table 10: Typical Properties of GA 1000R POE Property GA 1000R Density, g/cm 3 (ASTM D 792) Brookfield 350 F (177 C), cps (ASTM D 1084) 13,000 Approximate Melt Index, g/10 min 660 (190 C, 2.16 kg weight) DSC Melting Point, F ( C) 154 (68) Crystallinity, % 20 Glass Transition Temperature, F ( C) -72 (-58) Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Value is approximate; points are outside normal testing range. Dow Method. Test protocols and additional information available upon request. Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow STICK INGTO INNOV ATION Imagine what s next 8

10 Testing was conducted to compare the bonding of HMAs produced with GA 1000R POE with that of HMAs based on an EVA and GA 1900 POE on two hard-to-bond substrates: a beverage packaging substrate from China (Figure 6) and a coated, non-printed cardboard from South Africa (Figure 7). The results show significantly increased fiber tear for both substrates across a range of temperatures as the AFFINITY GA 1000R content increases. Figure 6: Percent Fiber Tear of Beverage Packaging Substrate Using HMAs Formulated with Selected Base Polymers at Various Temperatures Fiber Tear, % ~1 F (-17 C) Room Temperature 140 F (60 C) 0 40 wt% EVA 40 wt% GA wt% 10 wt% GA 1000R GA 1000R HMA Formulation 20 wt% GA 1000R 30 wt% GA 1000R 40 wt% GA 1000R Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Basic Formulation: 40 wt% Polymer, 34.5 wt% Tackifier, 25 wt% Wax, 0.5 wt% Anti-oxidant Balance of 40 wt% Polymer is comprised of GA 1900 (e.g., 5 wt% GA 1000R/35 wt% GA 1900) Figure 7: Percent Fiber Tear of Coated, Non-printed Cardboard Using HMAs Formulated with Selected Base Polymers at Various Temperatures Fiber Tear, % ~1 F (-17 C) Room Temperature 140 F (60 C) 0 40 wt% GA wt% GA 1000R 10 wt% GA 1000R 20 wt% GA 1000R 30 wt% GA 1000R 40 wt% GA 1000R HMA Formulation Data per tests conducted by Dow. Test protocols and additional information available upon request. Properties shown are typical, not to be construed as specifications. Basic Formulation: 40 wt% Polymer, 34.5 wt% Tackifier, 25 wt% Wax, 0.5 wt% Anti-oxidant Balance of 40 wt% Polymer is comprised of GA 1900 (e.g., 5 wt% GA 1000R/35 wt% GA 1900) Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow 9

11 Case Closed By combining excellent performance and processability with strong potential for lower total costs, GA Polyolefin Elastomers offer a very attractive option for both conventional and low temperature hot melt adhesives. Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow STICK INGTO INNOV ATION Imagine what s next 10

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