| SEOM
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SV
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PBOM
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OMPE
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PV
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DFOM
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There are no hard and fast rules as to
which bag style can or should be used for most commodities. However,
the following is a list of common practices, preferences, and considerations.
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Sewn End Open Mouth (SEOM)
- oldest method of open mouth
bagging.
Good choice when:
- low cost bag is needed
- product is free flowing
- product does not require high barrier
level
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Disadvantages
palletises only moderately well due
to length-width ratio and sewing tape ears
requires sewing equipment for closure
with attendant closure material needs and equipment maintenance
requirements
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Sewn
Valve (SV)
- used only because of available converting
equipment and low capital cost. PV is superior in all other respects
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Pinch
Bottom Open Mouth (PBOM)
- best protective bag
- can be made airtight with heat sealed
closures
- provides best sift resistance of
any bag
- proceeds best and highest level
of barrier protection
- does not require closure material
since pre-applied hot melt eliminates this need
- requires precision closing operations
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 Open
Mouth Pasted End (OMPE)
A pasted bottom open mouth sack manufactured
with stepped walls at the top. After the sack is filled, these walls
are folded to form a multi-ply, sift resistant closure by applying
a suitable adhesive or by reactivating factory applied adhesive.
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Pasted
Valve (PV)
- good for products that are powdered
to granular, free flowing, and do not require a high level of
barrier protection against water vapor, gases, odours, or greases
- provides best palletised loads on
the smallest pallet size
- high bagging rates attainable
- no filled bag closing materials
or equipment required
- entire system including palletising
can be highly automated
- sifting can be a problem in the
corners or out of the valve
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Double
Fold Open Mouth (DFOM)
The bottom of this sack is folded over
twice and then adhered to the sack wall. The top of the sack can
be manufactured for stepped end pasted open mouth or sewn open mouth
closure.
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