Possibilities of optimization through special treatments on the mold surface.Neck features and material behavior when filling and sealing the bottle.Reduction of necessary changes to already existing injection molds, in order to avoid modification.Consideration of the whole filling line and examination of the possibilities to change the configuration of the existing bottle.Here are just a fraction of the elements that SIPA is evaluating in search for a lighter bottle weight when designing a new bottle neck: Aspects to be examined in the search for further weight reduction Everything must be considered and coordinated. From blow molding to bottle making, labeling, packaging and palletizing. And – last but not least – the processing of the bottle and the preform in the filling and packaging machines during the entire filling process. The design of a lighter neck therefore requires a holistic approach that takes account of the preform and bottle production as well as the handling, filling. This creates high forces, which the finished bottle must then also endure. The neck of the preform contains the bottle mouth with the thread to which the bottle’s closure is applied later in the process. To design a light neck, a detailed inspection of product throughput across the entire process chain is required. Possibilities for saving material already almost exhaustedīut on a closer look we will soon discover that the situation is quite complicated. Therefore, based from a rough analysis it could be concluded that there is a good potential for a further weight reduction. The neck of the preform is the area in which the thickness of the preform and the bottle is at it’s maximum. Now only the neck is left, so the bottle mouth, where it is still possible to further reduce the weight of the bottle. The XTREME compression technology from SIPA was the last step to reduce the material in PET, preforms, bottle bottoms and bottle bodies. Developing PET bottles that have less weight is difficult, but necessary Each gram of PET too much simply means a reduction in the margins attainable for a beverage producer. Because the material PET is quite expensive. The reduction of material in PET bottles is not only desirable for reasons of environmental protection, but also has clear economic reasons in addition to ecological considerations. And it becomes increasingly difficult to remove even more weight and material from the bottle. Because the volume of the bottle will also affect the thickness, weight and cycle time of. Therefore, you should first determine what’s the capacity of the PET bottles (500ML, 1000ML or 2L) you want to produce. The weight, stretch and transparency of the preform will affect the bottle quality. Today, the entire packaging industry has come to a point where it is getting increasingly difficult to find elements of the PET preform and the bottle itself, where the material strengths can be further reduced. The PET preform is the foundation of the bottle. Over the years, SIPA, an Italian supplier of machinery and equipment for the beverage industry, has made significant efforts to design and develop lightweight PET bottles that retain their performance and productivity. Saving of PET material by weight reduction in the preform.
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