The 7 types of plastics
Monomers are the building blocks of the structure of plastics (e.g. ethylene). They are simple molecules (carbon and hydrogen). The union of many monomers constitutes a polymer (e.g. polyethylene).
It is produced through terephthalic acid and ethylene glycol by polycondensation. There are two types: textile grade and bottle grade; for bottle grade it must be post-condensed, and there are different colors for these uses.
It is a thermoplastic manufactured from ethylene (made from ethane, one of the components of natural gas). It is very versatile and can be transformed in different ways: injection, blow molding, extrusion or rotational molding.
It is produced from natural gas. Like HDPE, it is highly versatile and can be processed in different ways: injection, extrusion, blow molding and rotational molding. Its transparency, flexibility and economy make it present in a variety of containers, alone or in conjunction with other materials and in a variety of applications. Advantages
All varieties and types of plastics have a characteristic sign, which must be present on the product. As a rule, such icons are located on the package. In order not to buy a product that releases chemicals, you should familiarize yourself with the main types of plastic.
It refers to hazardous types of plastic, as it emits two chemicals that adversely affect the hormonal balance of people. The material is soft and flexible. It is most often used for the production of blister packs, storage of toys.
PVC is used in the construction industry, pipes, garden hoses and plumbing parts are made of PVC. Plastic is not environmentally friendly and can be recycled only in some countries.
Very often, the material is used to produce plastic bottles and plastic bags. Bottles do not emit chemicals, while it is better to refrain from buying packages. The products contain compounds that are hazardous to the human heart.
Polymers have revolutionized the materials industry and lowered the cost of end products. In this article, we explain the different types of plastic materials most commonly used, their properties and uses.
Plastic is a lightweight, durable, inexpensive and easy-to-modify material. It is made up of polymers, which are large organic molecules composed of repeating carbon units or chains called monomers, such as ethylene, propylene, vinyl chloride and styrene.
In general, plastic materials can be divided into thermoplastics and thermosets. When heated, thermoplastic components can be repeatedly molded and deformed, whereas thermoset materials cannot be remolded after formation. Thermoplastics are more common and include, among others, polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC) and polystyrene (PS). Some thermosetting plastics are polyurethane (PUR) and epoxy resins or coatings.
Types of plastic packaging
Plastics are synthetic materials made of polymers, large molecules consisting of a very long chain of repeated units, which, hence the name, can be shaped by heating. Each plastic has a certain temperature at which it ceases to be hard and brittle and becomes soft and malleable. A distinction must be made between thermoplastics and thermo rigid materials. The former remain malleable until they melt and retain the shape they have been given; if they are reheated, they can be reshaped by tensile forces. This happens because of the nature of the forces that hold their polymer chains together in a solid, with sufficient heat they can slide over each other. The shape of thermosetting materials, on the other hand, becomes unalterable above a certain temperature, usually high; the reason for this is the creation of cross-links, bridges of atoms that bind the polymer chains together and prevent the material from softening again when reheated. Cross-linked materials do not melt or dissolve, although they can absorb solvent; when they have absorbed too much, they become gels.