In India, the PET bottle blowing Polymer Engineering and Stretch Blow Moulding technology were initially introduced at lower profile. Commonly used synonym for PET Preforms container today is 'water bottle', the one that basically has a use and throw application. The cost of the bottle today is virtually three times that of the product (mineral water) cost. This leads to the belief that PET bottle blowing processing ought to be a low profile business with low cost of feasibility.While the paradox is, the cost of PET resin is one and half times that of conventional plastics resin cost. In the minds of the plastic manufacturer, it has been imbibed that, the raw material is costlier and the filling application is for the cheapest product on the earth i.e. water. This is the very reason the bottle processors were skeptical about the viability of PET project and hence opted for the low tech, lowest cost machineries and equipments.A well accepted fact today is that the PET bottle blowing technology is virtually introduced in every packaging application but still PET processors have to stick up with fallacy of water bottle processing techniques and the outdated blowing equipments. With time, resin prices are also on decreasing trend, glass industries are closing down, every day new products are being introduced in PET, concept of packaging in tin has become obsolete; considering these facts and the faster rate of market growth in this sector, its high time to realize the importance of stretch blow molding's PET product quality.In India, one tends to underestimate the outstanding properties of PET. This has developed the unbalance in the market of quality bottle demand to quality bottle supply ratio. We are still pretending to supply quality PET bottle at low cost with low profile incompetent blowing equipments. The fact is that, all these old tech equipments are at zero depreciation however they cannot be scrapped out because the growth potential of PET processing business is being underestimated. Sooner the better, because consequently the user market is developing the thinking that getting quality bottle in PET is very difficult task and thinking to turn back to older option. This is the major fact that needs to be realized by existing and upcoming PET bottle blowing processors.At the outset, PET is the complex material in the family of polymer. It evolves a great deal of elastic and plastic thermal behavior. When we refer to the comparatively simple and economical two-stage conversion process, the through thickness heating of the preform is the crux of the process. Since PET has very poor heat conductivity the conventional induction heating process doesn't work at all. Infact, improper method of heating of PET preform is the root cause of substandard bottle quality.The PET blow forming process is based on time and temperature dependence. Advance heat transfer engineering and sophistica-ted electro-pneumatics system is only capable of converting scientifically heated preform into quality PET bottles. High blowing pressure is the essential part for achieving desired strength in blown bottle. But this is not the PET bottle because it will not have those physical properties for which the PET has been introduced as economical alternative to the conventional packaging like glass or tin. Worldwide, the PET market is growing in a phased manner.
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