But when tiny amounts of nano-clay are added in to the PET pellets used to make bottles, this raises gas-barrier properties, heat resistance, and resistance to ultraviolet rays.
而生產保特瓶時，若在 PET 粒子中添加極少量的奈米級黏土，阻氣性、耐熱性和抗紫外線的能力就可以提高，口感會改善，回收再用的效率也比較好。