Application of PET Bottles in Hot-Filled Beverages

1️⃣ What Is Hot Filling?

Hot filling refers to filling sterilized beverages into bottles at 85–95°C, then sealing and cooling them immediately.
It extends shelf life and reduces the need for preservatives.

2️⃣ Why Choose PET Bottles for Hot Filling?

3️⃣ Key Technologies of Hot-Fill PET Bottles

✅ 1. Material Modification

• Uses Heat-Resistant PET (HR-PET) with enhanced molecular stability.

• Controlled stretch ratio and crystallinity improve heat tolerance.

• Crystallinity: 30–35%, withstands up to 88–92°C.

✅ 2. Bottle Design

• Features vacuum panels to absorb contraction during cooling.

• Reinforced shoulder and petaloid bottom enhance strength.

• Tight cap-neck seal prevents leakage at high temperature.

✅ 3. Manufacturing Process

• Uses hot molds (100–140°C) during stretch-blow molding.

• Precise filling and capping synchronization prevent neck deformation.

• Bottles are quickly cooled to below 40°C for shape stability.

4️⃣ Typical Applications

• Juice, tea, and flavored drinks

• Functional and vitamin beverages

• Low-acid or pulpy drinks

• Pasteurized dairy or probiotic drinks

5️⃣ Advantages Summary