PP Plastic also called Polypropylene was first synthesized in 1951 by researchers from Phillip named Paul Hogan and Robert Banks and then continued by researchers from Italy and Germany named Natta and Rehn. Began production for commercial 3 years after successfully synthesized by Italian researcher named Professor Giulio Natta. Natta succeeded in synthesizing and refining the first polypropylene resin in Spain in 1954. In 1957 it became popular and spread throughout Europe.
PP plastic has the following characteristics:
1. Have high melting point (130 degrees Celsius), so commonly used to produce microwave container.
2. Not reacting to water, detergent, hard water.
3. Hold to crack even when folded, so used a lot for hinge.
4. Durable enough.
5. Has a slippery surface.
6. Is a good electrical insulator.
This type of PP (polypropylene) is the best choice of plastic materials, especially for food and beverage places such as food storage, drinking bottles and foremost bottles for babies. Look for recycling code number 5 when buying plastic goods to store packaging of various foods and beverages.