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meridianplastics@bigpond.com
07 3200 3522

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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 Process
Learn more about the manufacturing process of extruding plastic.

plastic extrusion process

The Extrusion Process

Our extrusion process produces a premium Australian Made product for the many and diverse requirements of our clients.

Pellets of low density polyethylene (LDPE) resin are uniformly blended with specific additives. These additives enhance clarity, providing features such as strength, UV protection, surface appearance, slip resistance and other properties.

Coloured films are created using concentrated coloured pellets (Master Batch) added to achieve different opacities and colours.

Once blended, the resins are fed into extrusion machines under carefully controlled conditions, making the resin molten and pliable. The mix is forced through a precision die, introducing air and a "bubble" is formed ("blown film extrusion").

As the bubble is drawn up vertically, wall thickness and diameter are adjusted and the molten plastic is cooled before the film is laid flat under tension onto cores, forming rolls of plastic film. These rolls then progress through to the printing and/or bag conversion process.

The Printing Process

how is plastic printed

Printed products require a customised plate for each colour. The plates are mounted onto a cylinder and placed in the printing press. The image is transferred from each plate and precisely combined to make a complete picture.

Flexographic prints are made by creating a positive mirrored master of the image as a 3D relief in rubber or polymer. Flexographic plates are created with digital platemaking processes. Image areas are raised above the non-image areas on the plate. Ink is transferred from the roller which is partially immersed in the ink deck, then transferred evenly to the anilox roller and onto the printing plate. The extruded film is fed between the plate and the impression cylinder to transfer the image. The resulting printed film is run through a dryer, allowing the inks to dry before the surface is re-wound onto a roll again.

The Conversion Process

Plastic conversion

After the polytube is created, the rolls are reverse fed through specialised machinery. Depending on requirements, the rolls of polytube are cut and heat sealed. This process allows us to create custom products such as side or bottom seal bags, gusseted bags, punched bags, bags with die cut handles and many other variations.

Once your custom product is complete, they are packed into boxes and, depending on the amount, wrapped on pallets for delivery. We are very proud of our reputation and pride ourselves on producing a consistent, high quality Australian Made product in a reliable and timely manner.

What our customers are saying

"We have been dealing with Meridian Plastics for over 10 years, and have placed hundreds of orders in that time. Not once have we been let down on quality, turnaround, or delivery. Get people to deal with. Consistently high quality products. Consistently great customer service. Highly recommend them." ~ Barbara Kappeli

Manufacturing custom flexible poly packaging for your industry.
All of our products are made locally in our Brisbane factory.

We extrude, print and convert all in-house and under the one roof.

With over 35 years experience, we can assure you of professional and personalised service that begins with your first enquiry through to the delivery of your product.