| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a portable plastic bottle which is excellent in transparency, heat resistance and ultraviolet ray shielding capability. SOLUTION: For a portable plastic bottle, the plastic bottle is constituted of a copolymer of polyethylene terephthalate and polyethylene naphthalate. Then, the glass transition point (Tg) of the copolymer is made higher than 85 deg.C, and the light permeability is made to be 88-92%, and this plastic bottle has an ultraviolet ray shielding capability to a wave length which is lower than 370 nm, and the turbidity is made to be 1-1.5%.</p> |
