Dry Food and Snack Packaging

Snack Packaging that Locks in Crispness

DuPont packaging materials keep snacks, cereals, and other dry foods crisp and flavorful, and help production run faster.

Cracker bag-in-box packaging.

With a wide variety of materials and resin combinations, DuPont helps brand owners and packaging converters tailor solutions to meet any dry food or snack packaging need.

From keeping chips and cereals crisp and crunchy, to making sure cookies and confections come out of the package sweet and delicious, you can taste the difference DuPont delivers. You can see it on the shelf, and in on the production line in enhanced speed and efficiency.

One Size Does Not Fit All

DuPont packaging specialists and material science experts work with customers to develop innovative dry food and snack packaging ideas.  The result can be packaging that sets products apart, to increase shelf appeal, keep snacks and sweets fresh and tasty longer, and make them easier to open and enjoy.

DuPont packaging materials including DuPont™ Surlyn® ionomer resin and DuPont™ Appeel® peelable sealant resins help ensure consistent seals.

Benefits include:

  • Superior moisture vapor barrier
  • Quality sealing through dust and powders even at high line speeds and over a range of sealing temperatures
  • Resistance to punctures and abrasion for problem-free shipping and distribution
  • A variety of applications including easy-open bags, pouches, and lidding

Range of Durability Options

DuPont resin combinations and experienced product development support enable brand owners and converters to tailor the hardness, stiffness, or flexibility characteristics of packaging for better food presentation and protection against damage.

High Hot Tack Strength

DuPont packaging resins, including Surlyn®, are scientifically engineered to provide increased hot tack strength for sealing and superior performance under a broader range of sealing temperatures. This helps maintain higher packaging line speeds and reduces the number of seal failures for greater moisture vapor control.

Excellent Foil Adhesion

Surlyn®, Nucrel®, and Appeel® provide a strong, consistent seal to aluminum packaging, forming an excellent moisture barrier for a variety of snack and dry food applications.

Controlled Opening and Unrivalled Seal-Through

Surlyn® can be modified to control its opening force and provide a more consistent peel compared to other resins. Its opening force can be controlled by varying the thickness of the Surlyn® layer, while continuation peel force can be controlled by mixing different grades of Surlyn® resin. This allows Surlyn® to deliver:

  • Excellent tear propagation properties for directional tear 
  • Excellent peelability for easy opening
  • Stable peel performance over time
  • Reduced potential for seals to open during shipping and handling due to its high-performance seal characteristics
  • Seal through powder contamination, maximum hot tack, low Seal Initiation Temperature (SIT), and the broadest range of operating temperatures

Stand-Up Pouches for Cereal, Rice, Biscuits, and Cookies

For stand-up pouches, DuPont™ Surlyn® Burst Peel technology provides easy, no-spill openings, and, in some cases, re-closing features. It is based on a co-extruded film of HDPE combined with a thin sealant layer of Surlyn®. This differs from other easy-open technologies, which are typically based on blends of incompatible resins.

As with other DuPont snack packaging solutions, it offers excellent seal-through contamination, higher packaging line speed, and reduced leakers during transport. And it increases shelf appeal by making pouches stand up straight.

Surlyn® Burst Peel technology can be used in blown-film or cast-film processes. It can be used in laminates with other substrates such as Mylar® OPET films or OPP, or in coextrusions with PA, EVOH, or other barrier resins. It can also be applied by extrusion coating onto paper, aluminum, or metalized films.

Powdered Food Protection

For dehydrated foods, such as coffee, soups, soluble drinks, bakery mixes, and sauces, using Surlyn® in aluminum-based pouches provides:

  • Superior seal integrity, sealing through powder, gussets, and folds
  • Higher line speeds due to excellent machinability, stiffness, and low seal initiation temperature
  • Excellent protection against moisture and oxygen
  • Fewer taste and flavor issues due to the minimization or elimination of primers
  • Easy-tear opening

Cost Savings and Downgauging Potential

Only Surlyn® is able to combine stiffness and sealability at low temperatures. The direct adhesion of Surlyn® to aluminum, as well as its superior barrier performance with relation to oil, results in a greater resistance to delamination without the use of solvent-based primers or glues. Cereals and snacks packed in stand-up pouches eliminate the extra cost of the box. These combined benefits can lead to snack packaging material cost reduction. Surlyn® can also offer substantial downgauging potential, due to its toughness, which reduces puncture rates during handling and transportation, and its stiffness, which reduces overall thickness while still allowing for good machinability.