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Acetal Homopolymer ADHESIVE SHEAR STRENGTH (MPa) Loctite® 380TM Black Max® Instant Adhesive, Rubber Toughened 100 0.7 150 1.0 100 100 100 100 100 100 100 0.7 0.7 0.7 0.7 0.7 0.7 0.7 150 1.0 Loctite® 401TM Prism® Instant Adhesive, Surface Insensitive MEDICAL: Loctite® 4011TM Prism® Instant Adhesive, Surface Insensitive 200 1.4 600 4.1 400 2.8 900 6.2 350 2.4 350 2.4 1100 7.6 200 200 1.4 1.4 1750 21.1 Loctite® 401TM Prism® Loctite® 770TM Prism® Primer MEDICAL: Loctite® 4011TM Prism® / Loctite® 7701TM Prism® Primer 1700 1700 1700 1700 1700 1700 11.7 11.7 11.7 11.7 11.7 11.7 2800 19.3 Loctite® 414TM Super Bonder® Instant Adhesive, General Purpose 500 500 500 500 500 3.5 3.5 3.5 3.5 3.5 900 6.2 1100 7.6 100 0.7 500 3.5 1100 7.6 Loctite® 330TM Depend® Adhesive, Two-Part No-Mix Acrylic 50 0.3 100 0.7 Loctite® 3105TM Light Cure Adhesive, MEDICAL: Loctite® 3311TM Light Cure Adhesive 250 250 250 1.7 1.7 1.7 300 2.1 350 2.4 450 3.1 300 2.1 Loctite® 4307TM Flashcure® Light Cure Adhesive Loctite® H3000TM SpeedbonderTM Structural Adhesive, General Purpose Loctite® H4500TM SpeedbonderTM Structural Adhesive, Metal Bonder Loctite® 3032TM Adhesive, Polyolefin Bonder Loctite® E-00CLTM Hysol® Epoxy Adhesive, Low Odor Loctite® E-90FLTM Hysol® Epoxy Adhesive, Flexible Loctite® E-30CLTM Hysol® Epoxy Adhesive, Glass Bonder MEDICAL: Loctite® M-31CLTM Hysol® Epoxy Adhesive, Glass Bonder Loctite® E-20HPTM Hysol® Epoxy Adhesive, Fast Setting MEDICAL: Loctite® M-21HPTM Hysol® Epoxy Adhesive, Fast Setting Loctite® E-214HPTM Hysol® Epoxy Adhesive, High Strength Loctite® Fixmaster® High Performance Epoxy Loctite® 1942TM Hysol® Hot Melt Adhesive, EVA Based Loctite® 7804TM Hysol® Hot Melt Adhesive Loctite® 3631TM Hysol® Hot Melt Adhesive, Urethane Loctite® U-05FLTM Hysol® Urethane Adhesive, High Strength Loctite® Fixmaster® Rapid Rubber Repair Loctite® 5900® Flange Sealant, Heavy Body RTV Silicone 150 1050 Other Important Information achieved the second highest bond strengths. Loctite® 330TM Depend® Adhesive and Loctite® 5900® Flange Sealant achieved the lowest bond strengths on acetal polymers. The addition of an antistatic additive to acetal homopolymer resulted in a large, statistically significant increase in the bond strengths achieved when using Loctite® 401TM Prism®, 4011TM Prism® or 414TM Super Bonder® Instant Adhesives. 1700 11.7 50 0.3 100 0.7 1700 1700 300 11.7 11.7 2.1 100 0.7 (psi) 50 50 50 50 50 50 50 50 200 0.3 0.3 0.3 0.3 0.3 0.3 250 1.7 0.3 0.3 1.4 250 250 200 1.7 1.7 1.4 200 1.4 200 1.4 achieved the highest bond strength on all of the acetal formulations that were evaluated. Loctite® 150 E-214HPTM Hysol® Epoxy Adhesive, Loctite® 3631TM Hysol® Hot Melt Adhesive, Loctite® U-05FLTM Hysol® 1.0 Urethane Adhesive, Loctite® 414TM Super Bonder® Instant Adhesive and Loctite® 3032TM Adhesive 350 2.4 250 1.7 200 1.4 300 Surface roughening either caused no effect or a statistically significant increase in bond strength 2.1 achieved on acetal homopolymer. The use of Loctite® 770TM Prism® Primer, in conjunction with Loctite® 401TM Prism® Instant Adhesive, or Loctite® 4011TM Prism® Medical Device Instant Adhesive with Loctite® 7701TM Prism® Primer, caused a statistically significant increase in the bondability of both acetal 1.0 homopolymer and copolymer. Adhesive Performance Loctite® 401TM Prism® Instant Adhesive, when used in conjunction with Loctite® 770TM Prism® Primer, Surface Treatments 7.2 150 1.0 250 1.7 150 1.0 700 4.8 600 4.1 250 1.7 50 0.3 • The surface of acetals tends to be very dry, so an accelerator may be necessary to speed the cure of cyanoacrylates. • Acetal homopolymers are compatible with all Loctite® brand adhesives, sealants, primers, and activators. • Surface cleaners: isopropyl alcohol, Loctite® ODC-Free Cleaner & Degreaser. NOTES: The addition of the indicated additive (or surface roughening) caused a statistically significant decrease in the bond strength within 95% confidence limits. NOTES: The addition of the indicated additive (or surface roughening) caused a statistically significant increase in the bond strength within 95% confidence limits. The Loctite® Design Guide for Bonding Plastics, Volume 6 15 Delrin 150E produced by DuPont Polymers 23 rms Delrin 100 produced by Du Pont Polymers Unfilled Resin 30 rms RoUghened 47 rms AntioxidAnt 0.2% Irganox 1010 UV stAbilizeR 0.2% Tinuvin 328 0.4% Tinuvin 770 impAct modifieR 30% Estane 5708F1 lUbRicAnt 3.88% N,N’-Ethylene Bisstearamide Wax glAss filleR 20% Type 3090 Glass Filler ptfe filleR 15% PTFE MP1300 coloRAnt 4% 3972 colorant AntistAtic 1.5% Markstat AL12 AcetAl copolymeR Celcon courtesy of Hoechst CelanesePDF Image | Design Guide for Bonding Plastics Volume 6 LT-2197
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