Ask who invented the plastic garbage bag and the usual answer is two Canadians: Harry Wasylyk, an inventor in Winnipeg, and Larry Hansen of Lindsay, Ontario, who developed the polyethylene garbage bag around 1950. A Toronto inventor, Frank Plomp, is sometimes credited with a similar bag in the same period. In each version the first customers were institutions such as hospitals, not households.
The product has changed a great deal since then. The basic idea has not.
The problem the bag solved
By mid-century most city households kept rubbish in metal cans that had to be scrubbed out regularly, and hospitals faced the same mess with far higher stakes. Polyethylene, developed in the 1930s and widely available as film after the Second World War, offered a fix. It was waterproof, flexible, light and cheap. A thin PE sack could hold wet or contaminated waste and be sealed and lifted out whole. For a hospital ward, that containment was the main selling point.
From hospital wards to kitchen bins
The invention was taken up by Union Carbide, the chemical company Hansen worked for, which marketed the bags first to commercial users. During the late 1960s green plastic bags for the home went on sale under the Glad name, and within a couple of decades a roll of bin liners had become an ordinary item on supermarket shelves in many countries.
How a polyethylene trash bag is made
The method used today is a refined version of the one that made those early bags possible. It is called blown film extrusion.
- PE resin pellets, often a blend of grades plus colour masterbatch, are fed into an extruder and melted.
- The melt is pushed through a circular die to form a tube.
- Air is blown into the tube, inflating it into a tall bubble of thin film. The amount of inflation and the haul-off speed set the film’s width and thickness.
- The bubble is cooled, collapsed flat and wound or passed straight to a bag-making line.
- The bag machine seals the bottom, cuts or perforates each bag and, for rolls, winds them onto a core.
How the garbage bag evolved
Most of the features buyers now treat as standard arrived step by step, each one answering a complaint about the bag before it.
| Change | Problem it addressed | Where you see it now |
|---|---|---|
| Twist ties, then flap ties | Open bags spilling on the way to the kerb | Economy liners and refuse sacks |
| Drawstring tops | Awkward tying and carrying | Retail kitchen bags, such as our drawstring trash bags |
| Star seal bottoms | Leaks and gaps at the corners of a flat seal | Star seal bags on roll for commercial bins |
| HDPE, LDPE and LLDPE blends | Thick, heavy film that still tore | Thinner, tougher liners and heavy-duty contractor bags |
| Colour coding | Mixed waste streams | Recycling, general and clinical waste systems |
| Scented and printed films | Odour and brand visibility | Household and private label ranges |
| Recycled-content and compostable films | Environmental rules and retailer targets | Markets that require them |
Reading a modern trash bag spec
Seventy-odd years of development means a buyer now has a long list of choices. Start with the bin and the waste. Size comes from bin volume, and a trash bag size chart saves guesswork. Thickness, in microns or mil, follows the weight and sharpness of the contents. Then decide material, closure and seal, and finally packing: bags per roll, rolls per carton and carton size, which affect both shelf presentation and freight cost.
For a private label range, confirm print options and MOQ before artwork is final. At Hanpak, MOQ is flexible and quoted per size and design. A first order takes 4–6 weeks and a repeat order 3–4 weeks, counted from sample approval.
If your customers pull bags from a dispenser box, ask about interleaved rolls. Each bag is folded into the next, so pulling one out feeds the following bag up ready, and nobody has to hunt for an edge. For users who tear bags off by hand, perforated coreless rolls are usually cheaper and pack more bags per carton. Decide which you need before you set the carton size.
From the Hanpak team
Frequently Asked Questions
When did plastic garbage bags reach ordinary households?
The first PE garbage bags around 1950 were sold to institutions and businesses. Household versions went on sale in the late 1960s and became a standard grocery item over the following decades.
What are modern trash bags made from?
Mostly polyethylene: HDPE, LDPE, LLDPE or a blend. HDPE gives a crisp, strong film at low thickness, while LDPE and LLDPE add flexibility and puncture resistance. Recycled-content and compostable films are available for markets that require them.
Bring us your bag brief
From standard bin liners to drawstring bags and heavy-duty sacks, browse our trash bag range and send us your sizes, gauge and packing. You will have a quote within 48 hours. Request a quote or samples, or reach the team quickly on WhatsApp.