Cullet, The Recycle of Glass


Waste glass is called cullet. The word cullet comes from the art of glass forced. Each time a lost item is separated from the forced line there remains some glass at the bryanston glass forced line and also the connecting part at the lost item has to be removed afterwards. The last is also called the tiny neck of the blow piece or collet. These two items of glass, the collet and the blow line left-over are going back into the glass range, 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 bottles, 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 earth

The main purpose to get broken glass is recycle. Glass is an ideal material for recycle. Broken glass can be heated up in the glass range and from the glass burn new items can be made, over and over again and virtually there’s nothing 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 raw materials soft drinks ash, limestone and sand, every 1000 kilos of cullet used replaces 1., 200 kilos of the raw materials.

By adding 10% of cullet to the reducing glass group as opposed to the raw materials, 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 provided for landfill.

In layman’s terms: Recycle of glass is good for the earth (less skin tightening and output, reducing volume of waste landfill), it safes natural resources (less raw materials necessary, less fuel for reducing necessary) and it safes costs (lower energy costs).

Number of waste glass

Most people around the world are used to the recycle 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 amber glass. Otherwise the glass is separated afterwards at a cullet company.

This divorce of colors is vital. Glass of different colors have usually a different chemical nature and this influences things like reducing temperatureand viscosity. Another problem is the color because clear glass will be slightly colored anxieties a little green, amber or blue glass is mixed in the used cullet.

The household waste glass is mostly packaging glass, which is all made of the normal soda-lime glass. Heat-resistant glass has a totally different chemical nature. Anxieties a little bit heat-resistant glass occurs in cullet then it has a big affect on the viscosity during the reducing process and this has to be avoided. That’s why heat-resistant glass may not be thrown into a waste glass container.

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

Products made out of cullet

Because it is a bulk industry, the highest value product that is constructed of 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 filtration 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 replacement for pebbles or killed rock, for line bedding for sewer water lines and drinking water water lines.

Many glassware producers make use of cullet for their products. For high-end glassware enter into your esophagus 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. Anxieties cullet is used to produce a new glass group, the glass is not as homogeneous as it is made with the usual raw materials. This results in an end 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. A good example is the company Guajuye in Mexico that produces 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 bottles and make all kind of decorative products, but also useful products from the jawhorse.

Distancing 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. Meantime you also help companies reducing their costs and you create possibilities for other people to start a new business.

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