There are several potential problems that can arise when using RPET (recycled polyethylene terephthalate) food trays:
Contamination: RPET food trays can be contaminated with various types of materials, such as food waste, grease, or other chemicals, which can affect their quality and safety.
Weakness and brittleness: Recycled plastic can be weaker and more brittle than virgin plastic, which can lead to cracking or breaking of the trays. This can cause leaks, spills, and contamination of the food inside.
Limited heat resistance: RPET trays may not have the same heat resistance as virgin plastic, which can limit their use for hot or microwavable foods. They may also deform or warp when exposed to high temperatures.
Recycling challenges: Although RPET is a recyclable material, it can be more challenging to recycle than virgin plastic. The quality and purity of the recycled material can vary depending on the source and the recycling process, which can affect its ability to be reused for food packaging.
Cost: RPET food trays can be more expensive than traditional plastic trays due to the costs associated with recycling and processing the material.
Overall, while RPET food trays offer a more sustainable option for food packaging, they can present challenges in terms of quality, safety, and cost. It is important to carefully evaluate the benefits and drawbacks of using RPET trays and to ensure that they are used appropriately and safely.