The steps of dehumidification, drying, and melting are required to manufacture an A-PET sheet, a type of polyester sheet. The use of polyester as a raw material is also included in the processes of plasticizing, extrusion moulding, calendaring, and shaping.
Because the molten polyester travels from the die of the extruder to the cooler roll and is thereafter cooled down on the cooler roll, the polyester undergoes a state transition from a viscous liquid to a glassy state in a concise amount of time. The sheet of polyester that was obtained has an amorphous form, which means that it is not crystalline. The term for this type of sheet is an A-PET sheet.
A pet sheet is a useful product in many aspects, some of which are below.
Advantages of pet sheet
- The benefits that come with using pet sheets are primarily due to the PET raw materials.
- Thermoforming PET is not a complex process.
- PET's structure effectively blocks the permeability of oxygen and water vapour.
- PET has extreme resistance to cracking.
- PET plastic is exceptionally lightweight, yet despite this, it is still sufficiently robust. Pet sheets have high hardenability, and their mechanical qualities are comparable to thermosetting polymers.
- PET remains non-toxic and safe, making it an excellent choice for food packaging in addition to retail, electrical, and other product packaging applications.
The packaging business is the sector that makes the most use of PET sheets, which are utilized in a variety of applications, including the outer wrapping of a variety of items, packaging materials, disposable cups, fruit platters, and other similar applications.
Applications of Pet Sheet
PET sheet is a good material for environmentally friendly packaging due to its high transparency, gloss, outstanding damage tolerance and tensile stability. It also includes excellent printability and barrier qualities, a non-toxic and tasteless nature, and the fact that it does not absorb odours.
Products such as electrical gadgets, medical and surgical equipment, children's toys, sports safeguard products, clothing, printing stationery, and more can be sterilized by gamma rays without causing any damage to their appearance or characteristics.
Gamma rays can also treat waste economically, including reprocessing, burning treatment, and other waste management practices. Ideal material for use in packaging products in industries such as the food industry and others.
Blister moulding, folding box moulding, and high-frequency thermal synthesis are all methods they can use to create it.
Blister moulding
The sheet of APET is first blistered before being heated to temperatures between 90 and 120 degrees Celsius and then thermoformed into a range of packing containers. The temperature of such blister mould is between 30 and 50 degrees Celsius for vessels that do not require resistance to heat. It is possible to obtain this for vessels with heat-resistant criteria by raising the temperature of the mould and increasing the amount of time the blister is allowed to remain in place.
Silicon sheet with a Coating
A silicone (oil) coating is put on both ends of the material manufacturing line to assist with demolding or peeling during the blister process. Because of the product's excellent transparency, this coating can be seen from both sides.