Background
Plastic, which has contributed greatly to mankind, is gradually becoming the main culprit of destroying the Earth's ecosystem due to its reckless use. In particular, plastic packaging materials that are not composed of a single material are eventually not recycled and are being buried. Recently, the paper packaging industry for plastic replacement has been in the spotlight for these issues.
Limit
[Functional limitations of paper - Left (Oil resistance limit), Right (Water resistance limit)]
But paper still has limitations to replace plastic. In particular, the water resistance and oil resistance required to serve as packaging materials are significantly insufficient. In the past, polyethylene (PE) was used in combination to overcome these functional limitations, but alternative resources are needed due to the significant reduction in paper recycling rate.
Eco-friendly