BioPBS is produced from significant partially renewable resources such as corn, which could potentially move to non-food feedstock in the future. BioPBS has both industrial compostable and home compostable grades, but the current grade used for paper coating is only industrial compostable. By balancing the properties of heat resistance and compostability, we could achieve home compostable paper cup.
BioPBS also has another unique characteristic. Even though it has good adhesion to paper and can hold water without any problem, BioPBS can be easily separated from paper when soaking under water without damaging paper pulp. Paper pulp can be recycled to produce new paper again.
This cup can have several end-of-life options:
1. recycle paper for new paper and let film compost
2. home compostable the whole cup by using backyard compost
3. In case of leak to environment, it will degrade eventually in limited of time.
Concept conclusion is : a new gen BioPBS coated cup is designed to be home compostable and could be recyclable for paper cup and improving to having higher bio-content which is development scope for Next Gen Cup Challenge