Plastic Bags

A wide range of flexible polythelene bag solutions to suit every need.

Meridian offers a wide range of custom polybag options for all your needs. While the majority of our polybags are made from low density polyethylene (LDPE), we can also create medium (MDPE) and high density (HDPE) depending on your desired purpose. Low density polybags are the perfect cost-effective solution for food grade industries (from produce bags, meat processing through to food and beverage packaging), while higher density or heavier polybags are suited to industries such as mining and landscaping.

30+ Years

Food Grade


All Waste

Our Process

Our polybags, which are converted on our bag machines from extruded polytube, can be supplied either loose in cartons or on perforated rolls for easy tear-off use. Custom manufacturing allows us to offer a wide range of design features including gusseted bags, bottom seal plastic bags, side seal plastic bags, die-cut handles and perforation holes as well as tinted, opaque or clear natural finishes. With our expertise and in-house production, the possibilities are endless.

Side-Seal Bags

Side seal bags, also known as side weld bags, are usually bags with a lighter gauge. They are produced from folded polyethylene sheeting which is sealed (or welded) on each side with a hot blade. Side seal welds can be produced on flat or gusseted bags offering low-cost versatility, perfect for many retail solutions. As the seals are located on the length of the bag on both sides, the finished bag has one top opening and a seamless bottom.

Benefits of a Side Seal Bag

  • Bag opening can have a lip or backflip
  • No seam on bag bottom
  • Bag can have a bottom gusset
  • Bag punches, holes, hang holes, and thumb notches are easily applied

Applications of Side-Seal bags

Bag with Bottom Gusset

General Purpose Bags

Tradeshow Bags

Bottom-Seal Bags

The ultimate heavy-duty and leakproof solution, bottom seal bags are manufactured by using high temperatures to seal the bottom of the bag which is then cut with a flying knife. Bottom seal bags are tubular in design, with the seal located at the bottom width of the bag. They are designed to withstand great stress on both the seal and sides, making bottom seal bags an ideal choice for the use of heavy materials.

Applications of Bottom-Seal bags

Bags for Fresh Produce

Box Liners

Leakproof / Watertight bags

Potting Mix Bags

There’s a solution to your need.
Let us help you decide.

Side and Bottom Seal Bags

The difference between a side seal bag and a bottom seal bag is the method of manufacture. Bottom seal bags typically have a thicker gauge, are sealed using high temperatures and then cut with a flying knife. Lighter bags are generally produced as a side seal bag. A hot blade seals and welds the side of the bag.

Frequently Asked Questions

What different colours can you produce?

We can produce almost any colour in opaque or tinted colours as required.

Can you print on the plastic?

Our printing press can print up to 5 colours, within certain size parameters.

Is your plastic suitable for food packaging?

All of our products are suitable for food contact. Our plastic is manufactured using 100% virgin food grade resin, with the exception of some non food grade applications that we can use recycled material to make.

Can you recycle my unwanted plastic?

We do receive a lot of enquiries regarding recycling unwanted plastic. The only material we can recycle through our machine is clean low density polyethylene (LDPE).

Is your plastic biodegradable?

Whilst our plastic is recyclable, it is not biodegradable. Certain additives can be used to make the plastic biodegradable in landfill. Enquiries are welcome.

Is your plastic recyclable?

Yes! All of our plastic is recyclable. Most of what we produce is LDPE (Low Density Polyethylene) with a recycling code of no. 4

Do you keep plastic bags and rolls of polytube in stock?

No, as every job is customised we don’t keep stock on hand

Do you have a price list or catalogue?

Unfortunately no, as every job is customised and every customer requires something different.

Do you make the product here in Australia?

Absolutely! All of our products are Made in Australia in our Brisbane factory.

What type of plastic products do you manufacture?

Our blown film extruders produce flexible packaging, which are products such as polytube, bags, sheets, sleeves, centrefold etc.

All of Meridian’s products are proudly made in Australia. We are Australian-owned and operated and therefore, can guarantee a fast and reliable turn-over.

Why Meridian?

With 35 years of industry experience, Meridian are the trusted experts when it comes to high quality and affordable custom packaging solutions. We are passionate about consistently delivering excellent service and high quality products at a fair and affordable price. As a local Australian business, we offer a fast turnaround so that our clients’ businesses can thrive.

Martin has spent the past three decades working exclusively in the plastics manufacturing industry and has dedicated his entire career to mastering the art of manufacturing quality plastic packaging products. Involved in every step of the process, Martin’s attention to detail alongside his passion, dedication and expertise prove to be an invaluable resource when it comes to customising packaging for your business.

“I have dealt with Meridian Plastics since their early days when they started out in the 1990’s. Over that time I have always had good reliable service, as well as the staff being courteous whenever I have placed orders with them. I would recommend Martin’s product and services to potential clients.”
– Judy
“Meridian Plastics has provided material for our company for many years. During that time I have found them to be polite & professional. Their product is always of a very high standard and we value their expertise & manufacturing experience. I feel confident in calling on them at any time & look forward to a continued working relationship with Meridian Plastics.”
– Evol
“Meridian Plastics has supplied our company with quality bags for more than 20 years. Martin and his team have continually provided a superior product in a professional, courteous manner, and with a commitment to diligent, principled business practices.”
– Amanda