Dry Pet Food Packaging Case Study: Improving Oil Resistance And Shelf Appeal

01

The Customer's Packaging Challenge

The customer was developing a dry pet food product and needed custom printed bags for retail distribution.

During the packaging evaluation, two major requirements became clear.

1. Oil Resistance

Dry pet food often contains animal fats and oils. These oils can migrate toward the inside surface of the packaging and, depending on the material structure, may affect the appearance or sealing performance of the bag.

For this reason, the packaging needed sufficient resistance to oil and grease while maintaining its mechanical strength.

2. Shelf Appeal

The customer also wanted packaging that would stand out in a competitive pet food market.

The bag needed:

A large area for branding
High-quality printing
Strong color reproduction
A professional retail appearance
Good shelf stability

This meant that material selection and bag construction were equally important.

02

Choosing the Right Pet Food Bag Structure

For dry pet food, several flexible packaging formats can be considered, including stand-up pouches, side gusset bags, and flat bottom bags.

For larger quantities of dry pet food, side gusset and flat bottom bags are particularly practical because they provide higher capacity and better stability.

Flat Bottom Pet Food Bag

A flat bottom bag provides a box-like structure with a stable base, allowing the package to stand upright on the shelf.

It also provides multiple printable panels, giving brands more space for:

Product information
Feeding instructions
Ingredients
Nutritional information
Brand storytelling

For premium dry pet food products, this structure can create a more substantial and professional appearance.

03

Selecting the Packaging Material

The material structure needs to balance several properties:

Oil resistance + moisture barrier + oxygen barrier + mechanical strength + sealing performance

For conventional dry pet food packaging, laminated structures such as:

PET/VMPET/LDPE

can provide a good combination of barrier protection, printing performance, and cost efficiency.

PET – Outer Layer

PET provides excellent mechanical strength and a smooth printing surface.

It helps the bag maintain its appearance during transportation and provides a suitable surface for high-quality graphics.

VMPET – Barrier Layer

VMPET is a metallized PET film that provides improved protection against oxygen, moisture, and light.

This is particularly useful for pet food products containing oils and fats because oxygen exposure can contribute to oxidation and quality deterioration.

LDPE – Sealing Layer

LDPE is commonly used as the inner sealing layer.

It provides:

Good heat sealing performance
Flexibility
Moisture resistance
Suitable food-contact performance

Together, these layers create a balanced flexible packaging structure for dry pet food.

04

Improving Oil Resistance

Oil resistance is especially important when packaging pet food with relatively high fat content.

The packaging must prevent oil from affecting the appearance of the bag and maintain the integrity of the inner sealing layer.

Material selection is only one part of the solution. The overall packaging design should also consider:

Film thickness
Lamination quality
Heat-sealing conditions
Filling temperature
Product characteristics
Transportation conditions

For products with higher oil content or more demanding shelf-life requirements, a higher-barrier structure can be considered.

For example:

PET/AL/LDPE

uses an aluminum foil layer to provide stronger protection against oxygen, moisture, and light.

This type of structure is suitable when maximum barrier performance is required, particularly for long-distance transportation or demanding storage environments.

05

Creating Better Shelf Appeal

Once the technical requirements were established, the next step was improving the visual appearance of the pet food packaging.

Pet owners often make purchasing decisions based on packaging appearance, product positioning, and perceived quality.

A well-designed pet food bag can communicate:

Product quality
Brand personality
Ingredient positioning
Product benefits
Premium or natural positioning

A matte finish can create a premium appearance, while a glossy finish can provide stronger color vibrancy and visual impact.

For premium pet food brands, structures such as:

MOPP/VMPET/LDPE

can combine a matte outer appearance with good barrier protection.

06

Digital Printing for New Pet Food Brands

For a new pet food product, ordering a large quantity of printed bags before the packaging design has been fully tested can create unnecessary inventory risk.

This is where digital printing can be particularly useful.

Digital printing does not require traditional printing cylinders, making it suitable for:

Small batch production
New product launches
Multiple pet food flavors
Different package sizes
Artwork testing
Seasonal products

A brand can test different designs and SKUs before committing to large-volume production.

This provides greater flexibility during the early stage of product development.

When Does Gravure Printing Make More Sense?

For established pet food brands with stable artwork and high annual volumes, rotogravure printing can become more economical.

Gravure printing uses engraved cylinders, with each printing color generally requiring a separate cylinder.

For example, an 8-color design requires 8 printing cylinders.

The cylinder cost is an initial setup expense. Once the cylinders have been produced, they can generally be reused for subsequent orders using the same artwork.

Therefore, while gravure printing has a higher initial setup cost, its per-unit printing cost can become more competitive as order volume increases.

For small-volume testing, digital printing is generally more flexible. For high-volume, repeat production, gravure printing can provide better economies of scale.

07

The Final Packaging Solution

Based on the customer's requirements, the packaging solution focused on four key objectives:

1. Oil Resistance

The selected laminated structure provided a suitable barrier between the oily pet food product and the external packaging environment.

2. Moisture Protection

A suitable barrier layer helps reduce moisture transmission, which is important for maintaining the texture and quality of dry pet food.

3. Strong Shelf Appearance

The selected bag format provided a stable structure and sufficient printable surface for strong brand presentation.

4. Flexible Production

Digital printing provided an efficient solution for initial production and packaging testing, while gravure printing remained an option for future high-volume production.

08

Why the Right Pet Food Packaging Matters

For dry pet food manufacturers, packaging is part of the product experience.

A successful pet food packaging solution needs to balance technical performance with commercial requirements.

The right combination of:

Bag Style + Material Structure + Barrier Performance + Printing Technology

can help protect the product while creating a stronger retail presence.

Whether you are launching a new pet food brand or scaling an established product line, custom pet food bags can be designed around your specific filling weight, product characteristics, shelf-life requirements, and branding strategy.