Barrier Bags

MIL-B-81705 – Barrier Material, Flexible Electrostatic-Free, Heat Sealable

Type 1- Water vapor proof, opaque electrostatic protective, electrostatic and electromagnetic shielding.

Type 2- Transparent, waterproof, electrostatic protective, static dissipative.

Type 3- Transparent, waterproof, electrostatic protective, electrostatic shielding.

Woodcock, George B. The Packaging Handbook. Chatsworth, 2000. Print.

•  The Seal Top closure permits easy access to the contents while effectively protecting them from moisture and foreign matter. 
• Buried metal construction provides double protection against static discharge.
• Amine/amide-free interior will not corrode polycarbonate surfaces and produces no outgassing.
• The semi-transparent material allows for easy identification of contents in barrier bags. 
• The 3/8” Military Specification seal ensures packaging integrity during storage and handling. 
• Miller Poly Bags focuses on defect prevention rather than defect detection, in order to save our customers and time and money.

Dimensions

• 10" x 12" 3.6 Mil
• 10" x 20" 3.6 Mil
• 12" x 18" 3.6 Mil
• 15" x 18" 3.6 Mil
• 16" x 18" 3.6 Mil
• 10" x 20" 4.4 Mil

High Peformance

• Superior ESD shielding - greater than 99.9% attenuation, even at higher voltages.
• Superior EMI shielding - greater than 45 dB in the 1-10 GHz range.
• MVTR less than 0.02 gms in testing conditions (100F/ 90% R.H.)

What is meant by a barrier bag?

Barrier bags offer protection from one or more environmental factors.  They are typically "foil" bags so the questions to ask are the same as for foil bags.  There are quantifiable levels of barrier protection for these films.  Moisture Vapor Transmission Rate (MVTR) for water barrier, Oxygen Transmission Rate (OTR) for air permeability, Gas Transmission Rate (GTR) for non-oxygen vapors, and Optical Density (OD) for light barrier properties.  These are specifications that are frequently available from the end user and a key component in selecting the proper material.  Barrier bags are also available in some clear films, but they typically offer lower protection levels than buried metal constructions.

How do I measure barrier bags?

Anti-static bags are measured just like regular poly bags. ESD, Mil-Spec, and barrier bags are really pouches not bags.  They should have 2 or 3 seals that measure either 3/8" or 1/4" wide and they are measured i terms of the inside diameter (usable area) exclusive of the seals.  Different factories and different machines whithin those factories make different size seals so work with inside dimensions only.