Editing Polypropylene (section)

==Repairing==
PP objects can be joined with a [[Epoxy resin|two-part epoxy]] glue or using hot-glue guns.<ref>{{cite book|last=Athavale|first=Shrikant P.|title=Hand Book of Printing, Packaging and Lamination: Packaging Technology|url=https://books.google.com/books?id=DjxvDwAAQBAJ&pg=PT224|date=20 September 2018|publisher=Notion Press|isbn=978-1-64429-251-8|page=224}}</ref>

PP can be melted using a [[speed tip welding]] technique. With speed welding, the plastic welder, similar to a soldering iron in appearance and wattage, is fitted with a feed tube for the plastic weld rod. The speed tip heats the rod and the substrate, while at the same time it presses the molten weld rod into position. A bead of softened plastic is laid into the joint and the parts and weld rod fuse. With polypropylene, the melted welding rod must be "mixed" with the semi-melted base material being fabricated or repaired. A speed tip "gun" is essentially a soldering iron with a broad, flat tip that can be used to melt the weld joint and filler material to create a bond.