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All of our products are made locally in our Brisbane factory in Bethania. We extrude, print, convert and recycle all in-house and under the one roof.

plastic manufacturing blog

Our Blog
Want to find out more about Meridian Plastics? Read our regular blog page for the latest news and insights.

Plastic Recycling Codes Explained

Much of what we purchase, use, and dispose of these days is made from plastic.  The more we consume, the more important it is for us to be thoughtful in the way we dispose of our waste.  There are loads of different products out there, all made of different types and grades of plastic – so how do we know which ones are recyclable?  While every plastic variety is fully recyclable, not all plastics are accepted in curb side recycling programmes run by your local council, so it is important to understand the different recycling codes and how they are treated in your local area.

Have you seen the codes on the bottom of your plastics – the single number with the arrows going around them in a triangle shape?  The number indicates what grade of plastic it is and how to recycle it.  Here is a summary to help clear things up: 

The vast majority of our manufacturing uses the following two types of plastic – 

what does ldpe 4 meanLDPE – Low-density Polyethylene

Plastic 4 or LDPE (Low-Density Polyethylene) is a thermoplastic and one of the oldest grades of polyethylene.  This is the main type of plastic produced here at Meridian Plastics.  There are three methods of production – injection moulding, extrusion and blow moulding.  At Meridian we use the ‘extrusion’ method.  Extrusion entails heating plastic pellets to melting point, then the melted plastic goes through a predesigned opening and is cooled to solidify. 

solar panels in plastic manufacturing

Commitment to the Environment

Supporting our commitment to the environment, Meridian Plastics have installed the largest solar system possible at our premises.  We produce between 80 and 90 megawatt hours yearly, saving approximately 60-80 tonnes in reduced greenhouse emissions.  Our solar system produces 100% of our power needs on a sunny day and averages 2/3 of our total daytime energy needs over the year. 

Reduced Greenhouse Emissions

Meridian Plastics are always researching ways to improve our processes and our products.  Innovations that can advantage our clients and cause less environmental harm and even be beneficial to our environment will always be investigated fully and implemented wherever possible, without sacrificing what we deliver to you.

Buy Local plastic manufacturer

Why Buy Local

Meridian Plastics is proud to be an Australian Made and Owned local manufacturing company, but what does this really mean?


A Brisbane based family business; we understand our local Australian industry better than anyone else.   We work to strict Australian Standards and know the quality our customers expect.  When you deal with Meridian, you are speaking direct to the manufacturer rather than a call centre or middle person.  With easy access to the owner and operator, you can be assured that your instructions and specifications are not lost in translation at any point along the way.  So too, we are just a quick phone call or email away if you have any questions – you will not need to wait days for a response or have to concern yourself with allowing for different time zones.

how thick does plastic need to be

Um - How Thick Does My Plastic Packaging Need to Be?

We measure the thickness/gauge of plastics in micrometres (or microns) and its symbol is μm. Choosing the correct gauge for your packaging is an important step in the process. Too thin can result in damage to your product. Too thick and your product will not be displayed to its full potential.

Meridian Plastics understand you take pride and care that your product meets a particular standard. Let our experts guide you on the most suitable packaging for your needs ensuring your product has adequate and appropriate protection, without compromising on display.