PET is an acronym for polyethylene terephthalate – a synthetic resin of thermoplastic polymer. Although the progression in science of polymer was evident from the mid 18th century, the basic material of PET was patented for the first time around a century later in the year 1941. During Word War-2, it became a material of commercial applications right from fabrics to packaging. It was the year 1971 when the first PET bottle was patented.
Interestingly, around the globe, it is referred as a material carrying more popular local brand names, for example, Terylene in the United Kingdom, Lavsan in the once-upon-a- time USSR and polyester in the United States. PET, as a material, has always been in use in the textile industry, but in the contemporary times, it is hugely being used in the bottling industry around the globe. Consequently, the makers of PET blow moulding and hot runner systems have elevated to the occasion. Read more
Thanks to the polymer chemists who formulated polyethylene terephthalate, PET in short, the techniques of packaging have undergone revolutionary changes for the items from the FMCG segment in particular. It was found to be an ideal medium to pack mineral or filtered water, aerated beverages including spirits and liquor, processed syrups, sauces, edible oils, personal care items like shampoo and lotions, detergents, insecticides and industrial oils etc.
Indeed, the FMCG industry found PET to be the most favourable since it was extremely light and unbreakable as compared to the conventional glass, ceramics, tin, and even aluminium. Further the design and size of the packaging too happened to have ample scope for attractive variations and above all, PET packaging meant optimum shelf life. However, environmentalists including the NGT (National Green Tribunal) raised doubts over the PET technology despite scientific studies proving that it is no more harmful and that it can be recycled.
Presently, the modes of packaging thousands of edible and non-edible items are based on PET (polyethylene terephthalate) technology in which plastic injection molds give the shape and size of the desired container, be it the bottle or a jar. This is enabled by the hot runner systems that happen to be complex of heated components regulating the injection of the material in the cavities.
The concept of hot runner systems was initially developed during early 60s but gained popularity three decades later. One of the reasons for such delayed implication was the notion about PET containers not being environment friendly until scientists proved that PET is a recyclable material. Above all, the users realised that the hot runner systems are very cost effective and economical in the long run. Read more
In 2014, a leading global market research agency published its findings of a study conducted on the prospects for the Indian PET Preform trade and industry. It projected a highly optimistic market outlook till 2018. During this survey, it was noted that packaging sector is the largest application sector for the plastic industry, representing almost 60 percent of the total plastics demand. The forecast on consumption of plastics in this segment indicated a mammoth figure of 10 million tonnes by the year 2020.
Indeed, these signs have spelt a boon for the manufacturers of Injection Moulding Machine that is extensively used in PET bottling and allied products. Many of the companies engaged in this industry have created a global impact too. To cite an instance, the Delhi NCR-based Ashish Tools has geared up to meet the challenges of the future. Keeping in view these aspects, it has already setup a unit where mould Base are mould Inserts are assembled in dust proof environment. The range of machinery at this plant includes latest CNC systems from reputed international brands like DMG, Mori Seiki & BFW.
A hot runner system is an integration of heated components used primarily in plastic injection molds. It helps inject molten plastic into the hollow cavities of the mold. Where as, a cold runner system is simply a channel in between the two halves of the mold, designed to carry plastic from the injection molding machine to the cavities.
Every time the mold opens up to eject the newly formed plastic parts, the runner material is ejected too. This result in the wastage of the plastic deployed. On the contrary, a hot runner system includes a heated manifold. The primary purpose of the heated manifold is to allocate the plastic entering in the mold to the various nozzles and measure the injection points in the cavities. Read more