APR developed a low-cost test method for the rapid detection of HDPE and PP-based black packaging components using near-infrared technology.

An intersectoral working group made up of companies belonging to the Association of Plastic Recyclers (APR) successfully developed a recyclable black plastic. APR started the project about three years ago because black plastic often ends up in landfills because waste sorting systems usually cannot recognize black pigments.

According to data from Unilever, approximately 15% of plastic waste in the United States is made up of black plastic. For this reason, the company encouraged APR to form a task force to investigate possible solutions to address this problem.

After three years of testing and testing their own products, the working group developed a color-based technology that will produce sustainable black plastic that can be recycled at scale.

Led by Unilever, the group developed a low-cost test method for the rapid detection of HDPE and PP-based black packaging components using near-infrared technology, said Melissa Craig, Senior Packaging Sustainability Manager, Unilever North America .

The group consisted of several color manufacturers who developed new colors and pigment technology. Unilever tested several variations of detectable black colorants in some of its product lines, Craig explained.

The group’s commitment and investment in this project was a determining factor in the Sustainable Packaging Coalition (SPC) decision to move classifiable HDPE black plastic that meets APR and How2Recycle requirements to a broadly recyclable designation. SPC is an environmental organization that recognizes contributions and significant advances in making packaging more sustainable.

Detectable black colorant designed by color manufacturers is available worldwide, according to Unilever.

“This was a true partnership with APR and members of the Detectable Black / Dark Plastics Task Force,” said Craig. “The task force was the catalyst to elevate the conversation on how to obtain classifiable black plastic that has been tested with APR test methods to be eligible for a recyclable How2Recycle label.”

Unilever has already started using recyclable black plastic in some of its packaging lines and has transitioned most of its Ax portfolio, which is made up of 100% post-consumer recycled plastic, Craig said.