UPAC BLOGs

With over 50 years of experience, UPAC provides custom bag solutions for the food industry — helping to enhance brand impact, ensure food safety, and improve supply efficiency.

Multi-Layer Co-Extrusion: The Science Inside Modern Food Packaging Bags 

Pick up a modern food packaging bag and it may look simple. Clear film, neat seals, consistent thickness. Nothing unusual at first glance. Yet inside that thin wall is a

The Physics of a Seal: How Temperature, Pressure, and Time Control Seal Performance

When it comes to food-safe packaging, the seal is far more than a simple line of fused plastic. It is the first line of defence against contamination, spoilage, and operational

Down-Gauging Technology: Using Less Plastic Without Losing Strength

For many food processors, reducing plastic use is no longer just a sustainability discussion. It is a daily operational question. Procurement teams are under pressure to lower material consumption. Quality

When Packaging Holds You Back: Updating Artwork Without the Headache

Walk into almost any food production site and you’ll find it. A bag, film, or label design that has been in use for years. It still “works”, so no one

The No-Burst Test: How UPAC Seal Strength Performs Under Heavy-Duty Food Processing Conditions

It only takes one failed seal to disrupt an entire production run. Imagine a pallet of powdered ingredient arriving at a customer site. One bag bursts along the seal during

Why Bag ‘Slip’ Levels are the Secret to Maximum Uptime on Your Packing Line

In the high-stakes world of Australian food processing, a split second is the difference between a record-breaking shift and a costly maintenance shutdown.

Freezer Grade Plastics: Preventing “Cold Crack” in Meat Processing 

In the meat processing industry, maintaining product safety, freshness, and presentation is essential. For businesses handling frozen meat, packaging failures at sub-zero temperatures can compromise food safety, disrupt operations, and

Why Shifting from Paper to Plastic Can Help Bakery Products Reduce Food Waste

Food waste remains one of the biggest challenges across Australia’s food industry. According to the Australian Government, the country wastes 7.6 million tonnes of food every year, costing the economy

Feel Limited with Colours? Bakeries Can Print Up to 12 Colours with Us

If you run a bakery, you already know how much your packaging matters. Your bags, wraps, and labels aren’t just “something to put the product in.” They’re part of the

How the Right Packaging Helps Keep Sourdough Fresher for Longer

Every bakery has its own approach to packaging. Some prefer the natural charm of paper with a viewing window, while others opt for modern plastic bags due to their strength,

Why Labelling Your Bags Costs 2–3X More Than Custom Packaging

Plenty of small and growing businesses start out with plain bags and stick-on labels. It seems cheaper at first, but once you break down the true costs — and the

High-Heat Food Packaging Solutions for Bakeries

For bakeries, packaging isn’t just about holding a product—it’s about protecting it. Freshly baked bread, rolls, or pastries often need to be heated, transported, or stored under challenging conditions. And

Sustainable Packaging Options for the Bakery Industry

When it comes to bread packaging, clarity and freshness are top priorities. Customers want to see what they’re buying, and bakeries want to make sure their products stay protected and

Why Bakers Love Plastic Bags — The Science of Freshness

Freshness is everything in a bakery. Whether you’re running a bustling café in Sydney or packing orders for customers in regional towns, nothing beats the smell of bread straight from

Why There is More U in UPAC

When we say there’s more “U” in UPAC, we mean it — quite literally. Because everything we do starts and ends with you. You might think we’re “just a packaging

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