A Pinch Bottom Open Mouth ("PBOM") multi-wall paper bag is a common industrial packaging style designed to package a wide variety of dry flowable products. A PBOM bag offers the best sealing capabilities in the multi-wall paper bag family. Open Mouth bags are packed on equipment that deposits material into the bag via hopper or vertical filling spout. Once the bag is filled, a pinch sealer closes the bag by activating pre-applied glue on the bag’s opening with hot air, folding the open end over to complete the closure, and pinching the fold closed until the glue cures. The result is a completely sealed package. Pinch-style bags can be used on manual or fully automated equipment.
The seal in a PBOM bag or Webb Pinch Bag is formed when the bag’s innermost paper ply is folded over and welded to the bag’s outermost paper ply. Heat is applied to the outside of the bag to activate pre-applied adhesive located inside the bag’s opening.
A Webb Pinch Open Mouth (SSWPT) bag is a combination of 2 common multi-wall bag styles. A Webb Pinch bag has an SOS (Self Opening Satchel) rectangular base and a PBOM top (stepped top with pre-applied hot melt). Webb bags can be self-standing and offer better palletizing functionality that standard PBOM bags.
A PBOM bag is formed by folding and hermetically sealing the top and bottom openings of the bag. A filled PBOM bag is rectangular on the bottom and tapered on top. PBOM and Webb bags offer a variety of barrier options for optimal product protection.
Webb Pinch Open Mouth bags offer numerous
functional benefits over traditional PBOM bags.
Need a custom size, style, and print? We offer fully customized bag options for your business. Our range of bag styles include:
Minimum order quantities and artwork charges may apply. Lead times vary between 4 and 16 weeks depending on bag style.
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