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Scientists Discover Way to Send Information into Black Holes Without Using Energy

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This New MIT Invention Could Turn Old Clothes Into New Ones Again and Again

The fashion industry is one of the world's biggest contributors to waste, with millions of tons of clothing ending up in landfills every year. While plastic bottles, aluminum cans, and paper can be recycled through established systems, old clothes rarely get a second life. Most garments are either donated, thrown away, or burned because they are made from a mix of materials that are difficult to separate and recycle.

Now, researchers at the Massachusetts Institute of Technology (MIT) have developed an innovative recyclable yarn that could help solve this growing environmental challenge. The newly designed yarn can be melted down and remade into fresh yarn multiple times without losing its strength or flexibility, paving the way for a more sustainable and circular fashion industry.

The breakthrough addresses one of the biggest problems in textile recycling—the widespread use of spandex. Around 80 percent of textiles sold in the United States contain some amount of spandex, making them almost impossible to recycle. Spandex provides stretch and comfort but is typically combined with polyester or nylon. Because these materials are chemically different, they must be separated before recycling, a process that is expensive, complicated, and often requires harmful chemicals. As a result, most stretchy clothing ends up in landfills.

According to MIT research scientist Svetlana Boriskina, there is currently no widely adopted technology that can recycle textiles directly into new textiles. The team's newly developed yarn aims to change that by using materials that belong to the same chemical family, making recycling much easier.

Instead of relying on traditional spandex, the MIT researchers created the new yarn using polyethylene, one of the world's most common plastics. Polyethylene is already widely used to manufacture grocery bags, milk bottles, toys, pipes, and plastic containers. Unlike many textile materials, polyethylene is a thermoplastic, meaning it can be melted and reshaped repeatedly without significant loss of quality.

Although polyethylene has long been used in packaging, it has rarely been considered for clothing. In earlier research, the MIT team successfully produced polyethylene yarn with moisture-wicking, stain-resistant, and cooling properties. Their latest work takes the technology a step further by making the yarn stretchy enough to replace spandex.

To achieve this, the researchers designed the yarn with two polyethylene-based components. The inner core uses a softer, more flexible polyethylene resin that provides elasticity, while the outer layer is made from a stronger polyethylene resin that adds durability. Since both parts share the same chemical foundation, the entire yarn can be recycled together without requiring chemical separation.

The manufacturing process is surprisingly straightforward. Polyethylene pellets are heated to around 177°C (350°F) until they melt. The molten plastic is then pushed through tiny openings to form extremely thin fibres. These fibres are spun into yarn using equipment similar to machines already employed by the textile industry. One researcher compared the process to a spaghetti-making machine, where melted material is pushed through small holes to create long strands.

The real breakthrough came when the researchers tested the yarn's recyclability. They repeatedly melted and respun the same yarn 10 times, carefully measuring its strength and flexibility after each cycle. The results were impressive. Even after ten rounds of recycling, the yarn remained just as strong and flexible as conventional textile fibres.

This means garments made from the new yarn could eventually be collected after use, melted down, and transformed into entirely new clothing rather than being discarded. Even if the material is not reused for garments, it could be converted into everyday products such as buttons, belt buckles, or other plastic accessories.

The innovation also supports the concept of a circular economy, where materials remain in use for as long as possible instead of becoming waste. Rather than continuously producing new raw materials, manufacturers could recycle existing textiles into fresh products again and again, reducing the demand for new plastic production.

The environmental benefits could be significant. Every year, the average American throws away about 81 pounds of clothing, contributing to more than 11 million tons of textile waste that ends up in landfills or incinerators. If recyclable yarn becomes widely adopted, it could dramatically reduce this growing mountain of waste while conserving natural resources and lowering greenhouse gas emissions associated with textile manufacturing.

Another advantage is scalability. The MIT researchers believe the yarn can be produced using existing industrial equipment. Large textile manufacturers could potentially manufacture kilometres of recyclable yarn, making it suitable for commercial clothing production. This increases the chances that the technology could move from the laboratory into everyday fashion.

However, the researchers acknowledge that challenges remain before recyclable clothing becomes common. Recycling infrastructure specifically designed for textiles is still limited in many countries. Collection systems, sorting facilities, and industrial recycling plants will all need to expand to support large-scale textile recycling. Clothing manufacturers will also need to redesign products with recyclability in mind.

Consumer participation will be equally important. People will need convenient ways to return worn-out garments for recycling instead of throwing them away. Governments, fashion brands, and recycling companies will have to work together to build an effective system that supports circular fashion.

The research team has already demonstrated that the material performs well under laboratory conditions, and their next goal is to produce larger quantities of the yarn for knitting and weaving into commercial fabrics. If successful, the innovation could offer manufacturers an environmentally friendly alternative to traditional spandex while maintaining the comfort and flexibility consumers expect.

As concerns about pollution and textile waste continue to grow worldwide, innovations like MIT's recyclable polyethylene yarn provide hope for a cleaner future. By replacing difficult-to-recycle materials with a fully recyclable alternative, the technology could help transform the fashion industry from a major source of waste into a more sustainable, resource-efficient sector.

If adopted on a global scale, this breakthrough could mark an important step toward clothing that is designed not only to be worn but also to be remade—again and again—helping create a truly circular future for fashion.

Reference: SeongHyeon Kim et al, Polyethylene-Based Thermo-Mechanically Recyclable Stretchable Yarns for Circular Sustainable Textiles, ACS Materials Letters (2026). DOI: 10.1021/acsmaterialslett.6c00337

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