Polyester: Everything You Need to Know About One of the Most Important Industrial Polymers
In today’s world, few industries exist that do not utilize some form of polymer. Among them, polyester holds a special place. This versatile material plays a vital role across textile manufacturing, resin production, coatings, and composites. In this article from the Rasam Polymer Nami blog, we explain in simple terms what polyester is, how it is produced, and its applications.
What is Polyester?
Polyester is a type of polymer formed through a chemical reaction between a polyhydric alcohol (polyol) and a polycarboxylic acid. The resulting product is a long molecular chain with unique mechanical and chemical properties.
Polyesters are generally divided into two main types:
Saturated Polyesters
Unsaturated Polyesters
Each type is used in different industries depending on its molecular structure and applications.
What is Saturated Polyester?
Saturated polyesters have a stable structure and are resistant to heat and chemicals. They are commonly used in the production of industrial coatings, powder paints, packaging films, and synthetic fibers.
Key Features of Saturated Polyester:
High resistance to light and moisture
Good flexibility
Transparency and surface gloss
High thermal stability
At Rasam Polymer Nami, saturated polyesters are produced with high quality and customized formulations for coating and industrial applications.
Unsaturated polyesters contain double bonds that can react with styrene or similar monomers to harden. This property makes them suitable for manufacturing resins, fiberglass, composite parts, and adhesives.
Advantages of Unsaturated Polyester:
High mechanical strength
Easy moldability
Excellent adhesion to various surfaces
Good corrosion resistance
Polyester is a versatile material widely used across multiple industrial sectors:
Polyesters are widely favored due to their affordable price, high durability, and ease of processing, making them a substitute for many natural materials and even metals. With advances in technology, biodegradable and eco-friendly versions are also being developed.
Polyester is more than just a chemical—it is a cornerstone of the modern world. Its presence can be seen everywhere, from clothing and paints to petrochemical and automotive industries.
At Rasam Polymer Nami, we take pride in leveraging our technical expertise and extensive experience to produce and supply high-quality saturated and unsaturated polyesters for various industries in Iran and the region.