Cullet, The Recycling where possible of Glass


Waste glass is called cullet. The word cullet comes from the art of glass coming. Each time a lost item is separated from the coming tube there remains some glass at the coming bryanston glass tube and also the connecting part at the lost item has to be removed afterwards. The last is also called the insufficient neck of the blow piece or collet. These two items of glass, the collet and the blow tube left-over are going back into the glass your oven, they are recycled. The word cullet is probably derived from collet.

Some of the waste glass is collected. After collecting all the glass products are killed and this killed glass bears the name cullet. There is no typical size for the broken items of glass to be called cullet. Broken windows, broken wine beverages, broken glassware for instance, fit all to the category cullet.

There are companies which are specialized in selling cullet and offer a wide range of different colors and glass types.

Reusing waste glass is good for the surroundings

The main purpose to get broken glass is recycling where possible. Glass is an ideal material for recycling where possible. Broken glass can be heated up in the glass your oven and from the glass burn new items can be made, over and over again and virtually not a single thing lost.

Every metric ton or 1, 000 kg of cullet recycled, saves 315 kilos of skin tightening and from released into the atmosphere during the creation of new glass.

For the production of glass, from the garbage soft drinks ash, limestone and sand, every 1000 kilos of cullet used replaces 1., 200 kilos of the garbage.

By adding 10% of cullet to the burning glass order as opposed to the garbage, 2. 5% of energy is saved.

Since glass makes up a large part of household and industrial waste, due to its weight and thickness, collecting glass waste reduces the quantity of waste ship to landfill.

In layman’s terms: Recycling where possible of glass is good for the surroundings (less skin tightening and output, reducing volume of waste landfill), it safes natural resources (less garbage necessary, less fuel for burning necessary) and it safes costs (lower energy costs).

Number of waste glass

Most people around the world are used to the recycling where possible of glass. Already forty years glass containers can be found in many municipalities or there is some sort of organisation around the number of waste glass.

At the collection points usually clear glass is separated from the green and the silpada glass. Otherwise the glass is separated afterwards at a cullet company.

This parting of colors is extremely important. Glass of different colors have usually a different chemical nature and this influences things like burning temperatureand viscosity. Another problem is the color because clear glass will be slightly colored if perhaps a little green, silpada or blue glass is mixed in the used cullet.

Family members waste glass is mostly packaging glass, which is all made of the normal soda-lime glass. Heat-resistant glass has a many different chemical nature. If perhaps a little bit heat-resistant glass occurs in cullet then it has a big influence on the viscosity during the burning process and this has to be avoided. That’s why heat-resistant glass may not be thrown into a waste glass container.

Metal hats and plastic parts can usually be separated by the waste glass processor. However every non-glass part that falls to the parting process, like the Tungsten wires from the classic bulb, can give rise to inclusions which make the new glass not only less beautiful but it also makes the glass less strong (locally) which will be a safety issue.

Products made out of cullet

Because it is a bulk industry, the highest value product that incorporates recycled glass are new glass packaging materials (and also household glassware). Another high-value end product is fiberglass which can be used for insulating material materials or in blend materials. The cullet used for glass packaging and fiberglass needs to be color separated and free from any foreign material.

Cullet that doesn’t meet these specifications can be found in many other “secondary” applications like glass countertops, tiles, coarse products and filtering products.

Much research has been done to mix the glass cullet with concrete which is why the cullet doesn’t need to have high specifications. The concrete made in this way is stronger and has a higher insulating material capacity than concrete without cullet. The cullet used for concrete is called glass aggregates and is a mixture of cullet with different colors.

These glass aggregates are also increasingly used, as a substitute for rock or killed rock, for tube bedding for sewer water lines and drinking water water lines.

Many glassware plants make use of cullet for their products. For high-end glassware it’s usually up to 10% because the clarity of the glass can be affected by using more cullet.

Some glassware companies use cullet and just use cullet for the production of their glassware. If perhaps cullet is used to have a new glass order, the glass is not as homogeneous as it is made with the usual garbage. This results in a conclusion product with some local flaws and more air bubbles. Some glassware manufacturers utilize defects of this “cullet-glass”, because the products can look antique and more nostalgic. One example is the company Guajuye in Mexico making beautiful glassware from this type of glass.

People improvise all the time and there are artists and even companies who use waste glass before it is killed. Cases are the Green Glass Company and the French artist Laurence Brabant. They use old wine beverages and make all kind of decorative products, but also useful products from the jawhorse.

Breaking up glass and bringing it to the waste glass container is a common thing nowadays. By doing that you help reducing the pressure on the environment and natural resources. Meanwhile you also help companies reducing their costs and you create possibilities for other people to start a new business.

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