When buying bin bags, there are three key factors you need to consider.
The first of those is the type of bin bag you need. Bin bags are made in a variety of colours and from different materials. This determines what waste is going to be put in them, and how they will be disposed of.
The second factor to consider is the size of bin bag you need. It’s important that you find the right size bag to ensure you make the most of the space in your bins.
The final factor is the weight and quantity of waste going into your bin bags. To prevent rips and spills, it’s vital you choose a bin bag that is strong enough to handle the weight of your refuse.
Step 1 – Choose the type required
Where is the waste going to end up?
- If it is going to compost, you will need a compostable sack.
- If it is going to landfill:
- High security waste (especially in public spaces etc.) Use clear sacks.
- General/Domestic Waste – either a black sack or if it is part of a recycling scheme you may want coloured sacks.
- Industrial use – Extra heavy duty black sacks or compactor sacks (compactor sacks are available in both black and clear.
Step 2 – Calculate the size you need
To calculate which size refuse sack is needed for your bin just use these simple formulas. Round Bin Width of sack= Radius of bin x π (3.14) Length of sack= Length of bin + approx. 15cm for overhang and tying Length Radius Rectangular/Square bin Width of sack= width + depth of bin Length of sack= Height of bin + approx. 15cm for overhang and tying
How does the sizing work on a sack
A lot of bin liners are shown as three sizes i.e. 18x29x39”
This is how it works:
- The first measurement i.e. the 18 is the bottom gusset of the bag, useful if this is approximately the diameter of a round bin or width of a square bin.
- The second measurement, i.e. the 29 is the top measurement of the sack, double this makes the circumference of your bin top
- The third measurement is the length of the sack from bottom to top! This is where you need the extra to tie or fold over on your bin or sack holder!
Step 3 – Choose your Thickness
Not necessarily, so this is where testing comes in. CHSA have devised a scheme to make it easier to understand. Previously it was gauge or micron thickness. Another method is to check the weight of your sacks
Consider what kind content will go in the sack. For example if you know you are going to have heavy refuse then you will need a strong, durable sack, so you will need a 20 kg sack. If it will be used just for paper or other light weight items, you only need a 5 kg sack.
Here are some general examples:
- 5kg – Paper/General Office Waste
- 10 kg – Domestic Refuse and Recycling
- 15 kg – Catering Food Waste
- 20 kg – Industrial Waste