Spain is the world's second-largest producer of cork and possesses a quarter of the world's cork oak forests. Therefore, making a habit of recycling cork can be an excellent way to support this sector and improve our environment. Cork is endangered because it is often replaced by synthetic materials. When cork oaks no longer have an economic use, they are threatened, which can pose a threat to the entire ecosystem.
For this reason, we are going to tell you everything you need to know about recycling white cork, its characteristics and its importance.
Recycle white cork
According to Ecoembes (Spain's packaging recycling management system), consumers should store products made from natural cork in organic, brown packaging, so as not to hinder packaging recycling, although they receive very few cork stoppers. The recycling company is in charge of their management, taking them to a controlled landfill or some energy recovery system.
Used corks cannot be reused , especially if they contain liquid or residue that has come into contact with food or other materials. This is because they have been contaminated, and the industry cannot accept them again. However, the material can be recycled after proper treatment.
There is no system as structured as that for glass or plastic packaging for recycling white cork, although some companies have already started using advanced technologies for this purpose. Despite the high costs, the effective recycling of natural and white cork offers both environmental and economic benefits, promoting resource conservation and creating green jobs.
Although recycling natural cork stoppers still faces many limitations, we offer you some ideas on how to reuse this material at home. It is possible to give a new life to one of the most common by-products, such as cork stoppers, through crafts or DIY projects.
Main characteristics of white cork
White cork or expanded polystyrene (EPS) is a foamed plastic material derived from polystyrene, which is often used in containers and packaging or as a thermal and acoustic insulation material.
Its main characteristics include lightness, hygiene, and resistance to moisture, salt, acids, and fats . It also has the ability to absorb shocks, making it an ideal material for packaging fragile products. Because it is not a nutrient-rich substrate for microorganisms, it does not rot or decompose. These properties make it suitable for packaging fresh products, such as food and beverages.
Thanks to this versatility, we find this material in trays of vegetables, fruits, fish or meats in supermarkets and food stores of all kinds.
Another of its advantages is that it acts as a thermal and acoustic insulator, so its use is not limited only to the food industry, but is also common in construction works.
How to recycle white cork
Polystyrene, also known as Styrofoam, is a completely recyclable and 100% reusable material. It can be formed into blocks of the same material, creating raw materials for other products. It is important that, after use, it be placed in the yellow recycling bin , designated for plastics.
There are three main methods for recycling:
- Mechanical crushing: This is the oldest and most widespread process. It consists of crushing the material and mixing it with new EPS to form blocks of up to 50% recycled material.
- Mechanical densification: applies thermal and mechanical energy to compress the foam into more compact and manageable particles.
- Chemical dissolution: Although research is underway, methods of dissolving the foam are being studied to facilitate its handling.
Once white cork is recycled, it can be reused in a wide range of products, from construction parts to new packaging.
Cork sector in Spain
Spain is one of the world's leading cork producers, with significant cork oak forests on the Mediterranean coast, in Extremadura and Andalusia. These forests provide important environmental benefits, such as the protection of biodiversity. Without sustainable cork exploitation, the risk of desertification and loss of biodiversity would be much greater.
According to industry officials, around 3.000 people depend on cork production. In addition to traditional bottle stoppers (which account for 85% of the turnover), natural cork is used as thermal and acoustic insulation or in applications such as construction and furniture manufacturing. This helps generate employment in rural areas.
Recycling of polyexpan
When it comes to polystyrene, another name for expanded polystyrene, recycling follows a very similar process. This material, widely used in packaging and insulation, can be recycled in a variety of ways.
One of the most popular methods is to crush the polystyrene into small fragments. These fragments are then mixed with new material to form new blocks that can be reused in different products.
Another method, known as mechanical densification , uses heat to compact the polystyrene particles and facilitate their transport. There is also promising research on the use of solvents to facilitate large-scale recycling of polystyrene.
Styrofoam recycling thus becomes a fundamental process for reducing the amount of plastic waste that ends up in landfills. By reusing recycled materials we can close the consumption cycle and reduce the environmental impact.
With the information provided in this article, it will be much easier for you to identify where and how to recycle white cork. In addition, you will be contributing to reducing pollution and giving a second life to one of the most common materials in the packaging and construction industry.