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Polyethylene
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==Joining== {{See also|Solvent bonding}} Commonly used methods for joining polyethylene parts together include:<ref name="pdl">Plastics Design Library (1997). ''Handbook of Plastics Joining: A Practical Guide''. Norwich, New York: Plastics Design Library. p. 326. {{ISBN|1-884207-17-0}}.</ref> * [[Plastic welding|Welding]] ** [[Hot gas welding]] ** [[Plastic welding#Non-contact/IR welding|Infrared welding]] ** [[Laser welding]] ** [[Ultrasonic welding]] ** [[Heat seal]]ing ** [[Heat fusion]] * [[Fasteners|Fastening]] * [[Adhesives]]<ref name="pdl"/> ** [[Pressure-sensitive adhesive]] (PSAs) *** Dispersion of solvent-type PSAs ** [[polyurethane adhesive|Polyurethane]] contact adhesives ** Two-part polyurethane ** [[Epoxy adhesive]]s ** [[Hot-melt adhesive]]s ** [[Solvent bonding]] β [[Adhesive]]s and [[solvent]]s are rarely used as [[solvent bonding]] because polyethylene is [[nonpolar]] and has a high resistance to solvents. [[Pressure-sensitive adhesive]]s (PSA) are feasible if the surface chemistry or charge is modified with [[plasma activation]], [[flame treatment]], or [[corona treatment]].
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