Plastic & Powder Coatings #5715726

Polystyrene is a synthetic polymer manufactured from the monomer called styrene. It is one of the most widely used plastics due to its cost effectiveness and durability in normal atmospheric conditions. Polystyrene is thermoplastic in nature i.e. it is solid in natural state but flows when heated above 100 degrees Celsius. Structurally, it is a hydrocarbon with alternating carbons and benzene rings.

Though polystyrene has numerous applications, it is not bio-degradable and hence considered to be anti-environment. This is due to the fact that it is inert and on burning, releases carbon dioxide.

Polystyrene is prepared by a process called polymerisation, wherein monomers link together to form long chains.

Polystyrene comes in several forms, listed below:

• Moulded Polystyrene:This is the most common form. The shape is derived through vacuum forming or injection moulding. Highly rigid and durable, it finds wide applications in lab equipment, license plates, device housings, etc.
• Foam Polystyrene: This is a closed-cell foam which is rigid, tough and has high thermal insulation properties. When ingrained with graphite, it has even higher insulation. However, despite having closed cells, this form is not completely water-proof. Foam polystyrene can have two sub-forms:
  • Expanded Polystyrene Foam:This form is far more rigid and durable with closed cells and hence it is used for refrigerator trays, bowls, etc.
  • Extruded Polystyrene Foam:This variant provides a better surface roughness than the above variant and is commonly used in architectural models.

There are two common types of Polystyrene:

• General Purpose Polystyrene (GPPS): For applications where strength does not matter much, this brittle, but rigid and inexpensive form of polystyrene is used.
• High Impact Polystyrene (HIPS): Due to its inherent fragile nature, pure polystyrene is not suitable for building sturdy items such as toys and appliance parts. It is mixed with 5-10% butadiene rubber to produce a robust and strong substance called High Impact Polystyrene or HIPS. This is commonly promoted as high impact plastics.

Polycarbonates area group of Engineering Thermoplastic Polymers. They are essentially polymers containing carbonate groups. The production process of polycarbonates mainly involves producing a reaction between Bisphenol A and Phosge.They are naturally thermoplastic and are widely popular for their impact resistance and thermoplasticproperties.Themanufacturing process of Polycarbonate is as follows; hydrocarbon fuels are distilled into lighter groups called fractions. The fractions are then combined with other catalysts via a polymerization or Poly-condensation process to produce plastics. Both these processes are performed inside a reactor. Heat is then added to the reactor resulting in small molecules combining to form large molecules.The large molecules thus formed are plastic molecules.

Usage

Polycarbonates are mainly used in the manufacture of electronic components. They are also ideal for use in electrical and telecommunications hardware manufacturing. In the construction industry, polycarbonates are used for making dome lights, flat/curved glazing, sound walls, etc.Data storage applications of Polycarbonates include manufacture of CD's, DVD's, and Blue Rays.They are also used for making signs, displays, poster protection, etc. Automotive applications of Polycarbonates are very popular such as headlamp lenses, bullet-proof glass, etc. Polycarbonates are good UV filters, which makes them best suited for eyewear and glasses. The medical industry also uses Polycarbonates for many applications. Other uses of Polycarbonates include for manufacture of moulded mirror housings, bottles, containers, tableware, etc. Popular consumer goods manufacturers use Polycarbonates to make electric kettles, fridges, food mixers, electrical shavers, hairdryers, etc.

General-purpose Polystyrene, also known as GPPS is a substance prepared from styrene monomer polymer. It is a solid, transparent product and is manufactured by a suspension process. It is also known as crystal-clear polystyrene and is very different from high impact Polystyrene (HIPS). GPPS is converted into a range of products by converting it into granular form. It has several useful properties like strength, weather resistance, etc. that makes it ideal for use in various industrial applications. GPPS flows freely and easily. General-Purpose Polystyrene has very inexpensive production cost, can be stored easily, and can be molded with ease. These characteristics render GPPS products versatile and recyclable. It is also FDA compliant and resists X-Rays, Odor, and Taste.

Usage

Since GPPS can be easily molded, it is used to make enclosing products like toys, CD cases, hangers, plastic cups, IT equipment, jewelry boxes, etc. The medical industry also uses general purpose polystyrene to make test tubes, test kit housings, diagnostic products, petri dishes, tissue trays, etc. Even several household equipment like bath accessories and garden equipment use General-Purpose Polystyrene. Manufacture of refrigerator components like crisper trays and egg shells also need General-Purpose Polystyrene. Popular user commodities like toothbrushes, toothbrush containers, flat lay boxes, ball pen barrels, geometrical appliances, etc. are made using GPPS. All major industries belonging to food packaging, refrigeration, audio/video making, consumer electronics, office equipment, medical devices, and toys need General-purpose Polystyrene.