instore - January 2016 - (Page CI10)
Vacuum Food Packaging:
Choosing the Right
Solution
By Bob Goldberg, Marketing Manager, PAC Machinery, San Rafael, California
oday consumers have the expectation that vacuum packaged
food products will be fresh and
wholesome when opened. To meet this
expectation, packagers must consider
a few critical requirements including the storage bag configuration, the
correct bagging material, and the appropriate packaging process. When
done properly, vacuum packaging can
extend freshness, preserve texture
and appearance, protect nutritional
value, and maintain the flavor of food
significantly longer than many other
food storage methods. The demand for
quality is the same whether the commissary focuses on small retailers or
serves large scale, chain store operations.
T
Many food products have unique vacuum packaging requirements. Coffee,
for example, requires a different set of
criteria (bag material, packaging process, etc.) than cheese, or fresh chicken. When considering vacuum packaging, it is important to keep a few things
in mind:
* How long will the product remain in
the package?
* Is the product wet or dry?
* Is microbial contamination or oxidation an issue?
* Will the product require modified atmosphere packaging?
Understanding how the contents of the
bag can and will affect the packaging
is key in determining the specific packaging process required, the bag style,
bag material and the most appropriate
choice in packaging equipment.
10 * JANUARY 2016
*
Choosing the Appropriate
Process
Vacuum packaging equipment
can be found in a wide variety of
configurations, but usually follows
two common approaches: nozzlestyle vacuum machines and chamber
vacuums.
The most versatile method of vacuum
packaging is by means of a nozzle-style
machine. Designed for horizontal or
vertical use, nozzle-style vacuum sealers range in sealing lengths from 12
inches to over 120 inches, and are available in both tabletop and floor standing
versions. This style of machine is ideal
for vacuum-sealing solid or bulky food
products. Nozzle-style vacuum packaging is relatively uncomplicated. A
filled bag or pouch is placed between a
set of sealing jaws over stainless steel
vacuum nozzles that extend between
the jaws. The jaws grip the bag while
air is evacuated through the nozzles by
means of a vacuum pump or venturi
system. Next, if desired, gas is flushed
through the same set of nozzles into
the bag. At the end of the vacuum or
gas cycle the remaining air or gas is
evacuated, the nozzles retract from
the bag, and the sealing cycle is completed. Most machines enable the operator to vacuum seal one or two bags
per cycle-depending upon the model
and bag specifications. One of the advantages of nozzle-style machines is
that they often require a shorter cycle
time. Specialized sealers with multiple
nozzles enable four or more bags to be
sealed in a single cycle.
Vacuum chambers offer a high level
of vacuum and consistency. This easyto-use method of vacuum sealing bags
commissary INSIDER
PHOTO: PAC MACHINERY
is chosen when the highest degree of
vacuum is required (for example, when
packaging meat or cheese). Vacuum
chambers vary from small tabletop
units to large, floor standing, single
and double chambers. Like nozzle-style
vacuum packaging, vacuum chamber
packaging is a fairly straightforward
process. A filled bag or pouch is placed
on the bed of a chamber with the open
end positioned in contact with the seal
bar. The hood of the chamber is closed
after the product has been loaded, and
the vacuum cycle begins automatically.
A vacuum pump removes air from the
entire chamber. This step may be followed by a gas flush cycle(s), if required. The sealing cycle begins immediately after the vacuum or gas cycle
has completed. The hood of the chamber opens automatically at the end of
the sealing cycle. With bags lined up
along the length of the sealing bar, vacuum chamber machines can package
as many bags per cycle as the sealing
bar length will accommodate. Vacuum
chamber sealers are excellent for powdery foods as well those packaged in
liquid. Unlike the nozzle-style vacuum,
the entire chamber is evacuated, eliminating the possibility of pulling powdery or liquid material into the vacuum
nozzles.
Large Reach
Vacuum packaging in one form or another has been at the center of food
preservation for generations. Although
once exclusive to commercial food
packagers and processors, vacuum
packaging is now available to smallscale food processors as well as home
users. Modern equipment now ranges
in size from home "food saver" models to high production, high volume
industrial systems. Vacuum packaging
has become, and will continue to be, a
key process for preserving flavor, color
and texture-and for ensuring a wholesome and available food supply.
Table of Contents for the Digital Edition of instore - January 2016
instore - Jan + Feb 2016
Editor's Note - Gourmet Domination
Table of Contents
News - On Our Radar
Product Spotlight - Breads and Rolls
Product Knowledge - Fresh on the Side
Merchandising - Merchandising Madness
Comissary Insider - Insight Insider: From small scale to big time
Research and Development: Packing in the Protein
Food Safety: Ready For FSMA 2016
Vacuum Food Packaging: Choosing the Right Solution
Dips and Spreads Spotlight: Hummus Still the King
Technology: Sous Vide
Cover Story - Time to Shine
Specialty Insights - Single-Serve Cheese
Equipment & Packaging - Interest Increasing
Product Trends
Product Showcase
Ad Index
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