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MettonŽ LMR: Bonding and Painting Typically, mold
release is not used in the molding process for Metton LMR and the parts
easily release from the mold. However, the freshly molded part has a
low surface free energy and no chemical (polar) functionality on the
surface to aid in chemical adhesion. The part surface can be readily
oxidized to create a functional surface chemistry which provides sites
for chemical bonding. The surface of Metton LMR part is sensitive to
ultraviolet light where outdoor exposure will cause surface fading or
chalking in extended direct sunlight. Painting is recommended for applications
requiring an aesthetic surface finish for outdoor use. Paint Options Metton LMR Achieves Chemical Bonding with Standard Paints - Adhesion is Typically 5B After Initial and Post Humidity Aging - Metton LMR has Excellent Gravelometer Results with Consistent 9+ and 10 versus Steel in the 5 to 7 range Note: Metton LMR available color is black only |
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| Heavy Truck Roof Side Fairing Extender Bond Fixture | Adhesive Bonding | |||
| (Bond Gap Stand-Offs are Molded-In) | Metton LMR is an Excellent Substrate for Bonding | |||
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Lap Shear Data for Two Adhesive Systems are as follows: | |||
| Lap Shear Strength, psi (Failure Mode) | ||||
| Adhesive | 23°C | 82°C | -30°C | |
| Vantico | ||||
| Arathane 8086/5541 | 796 (SB) | 220 (C) | 900 (SB) | |
| Dexter | ||||
| Hysol EA 9460 | 840 (SB) | 490 (SB) | 905 (SB) | |
| ITW | ||||
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Plexus MA420 | 800 (SB) | 200 (SB) | 900 (SB) |
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* |
Plexus MA1021 | 800 (SB) | 200 (SB) | 900 (SB) |
| Ashland Chemical | ||||
| Pliogrip 6600 / 6036 Primer | 886 (SB) | 310 (SB) | 578 (C) | |
| Lord Corp. | ||||
| Fusor 7525 A/B | 740 (C) | 266 (C) | 695 (SB) | |
| Lap Shear values are high with the primary failure mode being Stock Break (SB). A few are Cohesive (C), which means glue remains on both pieces of the bonded specimens. | ||||
| Please request our Metton LMR Post Molding Guide for more detailed guidelines relating to the use of paints, structural adhesives and repair materials. | ||||
| * Plexus methacrylate adhesives require no surface grinding prep prior to bonding. | ||||