Multi-Wall Pinch Bottom Open Mouth Bags

Sustainably sourced from the highest quality papers and films. Our standard PBOM and Webb Pinch bags offer airtight sealing for food, pet care, and sensitive chemicals.


Superior Sealing, Maximum Protection

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.


Features & Benefits

  • Ideal for packaging food, pharmaceuticals, pet food and chemicals
  • 20-100lb Capacity
  • Manufactured with 3-6 plies of paper
  • Pre-Applied Adhesive for Heat seal closure
  • Multiple moisture barrier options
  • Foil and Mylar liners available for odor protection
  • Available with a PE coated inner ply, a free film between the paper plies, or greaseproof paper
  • Available with Easy-Open feature
  • Leak-proof design capabilities
  • Flexographic printing in up to ten colors
  • Matte or glossy finish
  • UN Certification
  • Fully customizable for desired application

Paper Types

Traditional Kraft Paper High Performance Extensible Paper
Manufactured from short wood fiber Manufactured from long wood fiber
Heavy, coarse sheet Smooth sheet
Strength through high basis weight Strength through superior energy absorption
Limited stretch 6-7% stretch
Low levels of porosity High levels of porosity
Limited energy absorption Superior energy absorption
Ideal for 3-4 ply bag construction Ideal for 2 ply bag construction

Heat Seals

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.

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Film Barrier Options

  • Low Density Polyethylene
  • High Density Polyethylene
  • Capcote
  • PE/Foil
  • Polypropylene
  • Saran Coated PP
  • Mylar
  • Saranex

Webb Pinch vs. PBOM

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Webb Pinch

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.

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Benefits of Webb Pinch vs. Standard PBOM

Webb Pinch Open Mouth bags offer numerous
functional benefits over traditional PBOM bags.
Benefits include:

  • Ability to stand up unsupported
  • Attractive Bag Shape
  • Ideal for retail applications
  • Greater Stability & Stackability
  • Enhanced Palletization

Custom Tailored Packaging Solutions

Need a custom size, style, and print? We offer fully customized bag options for your business. Our range of bag styles include:

  • PVSE
  • SOM
  • PBOM
  • Webb PBOM
  • SOS
  • UN Certified
  • AIB

Minimum order quantities and artwork charges may apply. Lead times vary between 4 and 16 weeks depending on bag style.

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On-Demand Packaging Solutions

For customers needing bags immediately, we maintain a substantial inventory of off-the-shelf printed and plain blags.

Get In Touch

Our team can deliver the packaging you need, when you need it. Complete your info here and we'll be in touch quickly.

Manufacturer Certifications

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