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HPP works well with packaging that contains very little air and/or headspace. HPP can accommodate a wide variety of packaging types, as long as at least one surface can flex up to 15% to account for the compression seen due to the high pressures.

Different HPP-compatible packaging types include, but not limited to:

1. Bottles:
  • PET - Injection stretch blow molded for clear containers.
  • HDPE - Blowmolded for translucent to opaque containers.
PET bottles offer higher oxygen barrier than HDPE at common thicknesses.
  • PP - Commonly used as base material for closures, which can also incorporate thermoplastic elastomers (TPE) in some versions for tight seals.
Induction sealable liners principally comprise aluminum foil combined with a heat seal peelable layer of LDPE or copolymer-type materials. Head space can be flushed with N2 after filling to minimize oxygen in head space

Note on Bottle Caps

It is crucial for the cap of any product going through HPP to have the correct design. The threads on the cap must create a tight seal and be completely locked to avoid any leakage upon decompression in the HPP machine. It is recommended to have an inner seal in the cap that aligns with the lip of the bottle and ideal if the cap cannot be overtightened. For double-seal caps, HDPE, PETE, and PET are ideal. Double ring caps are preferred, and small single ring caps do not work well with HPP.

2. Flexible Pouches and Bags:

Flexible, sealed polymer-based packages that can be used for liquid, paste or solid products. Used for retail and food-service/processor packs. Depending on channel, decoration ranges from sophisticated printed structures to post applied labels. Soft drinks, bottled waters, wines, spirits and specialized nutritionally enhanced beverages are also packaged in flexible packaging.

3. Trays

Semi-rigid, sealed polymer container capable of use for solid foods or ready meal components consumers either consume directly from the container or remove individual items for use in recipes or placement on a serving dish. Typically labeled or decorated on flat lid film surface unless secondary pack contains the tray. Can also be vacuum skin packed with drawn film covering product placed in tray.

4. Flexible packaging

Vacuum-packed and modified atmosphere packaging (MAP). A lot of meat products are packaged in flexible vacuum packed packaging.

5. Tubs:

Semi-rigid, sealed polymer container capable of use for paste, solid/sauce mixtures or liquid products. Typically labeled or decorated on sidewalls as well as on snap fit lids that cover film seals.
  • PET - clear or pigmented containers.
  • HDPE - translucent to opaque containers.
  • PP - good contact clarity containers.
  • Co-extruded structures can include EVOH or nylon for enhanced oxygen barrier; barrier lid films should be used in conjunction for high total package barrier.
Majority of containers are thermoformed, but injection molded versions also possible, and make incorporation of in-mold labeling (IML) technology for integral sidewall labels. Injection molding also permits greater control over container thickness profiles and can achieve higher height to width ratios with good thickness profile control.
  • Lid films range from oriented films with peel-seal layers to complex and heavy weight coextruded films.
  • Snap fit lids or over caps are generally PET or PP, although PE versions can be used; they typically are monolayer, do not provide barrier and are labeled or decorated; they can be clear or opaque depending on the appearance of the product or marketing considerations.
  • Heat sealed lids.
Can be gas flushed to limit oxygen in headspace and extend shelf life.

6. Bulk bags

Bag-In-Box is a flexible package ideal for both chemical and food applications ranging in size from 1L to 25L. CDF offers both form fit and pillow styles to meet all flexible packaging requirements. Benefits of bulk bags include significant cost savings in logistics and storage costs using at least 80% less plastic than rigid containers and 50% fewer CO2 emissions during transport than competitive rigid packaging. Download this PDF document   for more information or visit the website   of CDF.

HPP Canada

Updated : 23 March 2022    © HPP Canada 2021    Webmaster :