Daya PET preform injection moulding machine is special designed and developed for the making of kinds of PET bottle preform,such as 300ml,500ml,1000ml,1500ml bottle preform,5 gallon bottle preform,etc.ABOUT US. RAAS POLYPLAST LLP, formed in 2014, specialises in manufacturing of Preforms, Caps and Closures and Drippers by Injection Moulding machines. These Preforms and caps are specially designed to save upto 15% and 21% plastic respectively. We boast of using the best machineries and moulds manufactured in India.The preform is an article made of Polyethylene Terephthalate,monly known as PET. It is normally manufactured using a mould on an injection system, which is subsequently blown into a container for edible or non-edible liquids (water, soft drinks, milk, alcohol, oils, detergents, personal care) on a blowmoulding system.The concept of the Natural Stretch Ratio (NSR) of PET is reviewed and how it must be considered when designing and blowing preforms. The concept of heat-setting is introduced in order to reduce the stress that develops in a blown bottle. Lastly, a number ofmon myths pertaining to PET bottles are discussed.