Polyethylene terephthalate is the most important type o […]
Polyethylene terephthalate is the most important type of thermoplastic polyester. The English name is Polythylene terephthalate (PET or PETP (hereinafter referred to as PET), commonly known as polyester resin. It is a polycondensate of terephthalic acid and ethylene glycol, together with PBT, collectively referred to as a thermoplastic polyester, or a saturated polyester. PET is a milky white or pre-yellow highly crystalline polymer with a smooth and shiny surface. It is resistant to creep, fatigue, friction and dimensional stability, low wear and high hardness, and has the highest toughness in thermoplastics. It has good electrical insulation properties and is less affected by temperature, but has poor corona resistance. Non-toxic, weather-resistant, chemical-resistant, good water absorption, weak acid and organic solvents.
PET bottles have strong applicability and are widely used in daily necessities, daily packaging and other fields. From mold processing to machine equipment, it is extremely critical, easy to get started, and difficult to do. PET preforms are re-processed by blow molding to form plastic bottles, including bottles for cosmetics, medicine, health care, beverages, mineral water, reagents, etc. This bottle making method is called a two-step method, that is, forming preforms by injection molding, again A method of forming a PET plastic bottle by blow molding.