![]() These containers can prevent oxygen from entering and keep the food unchanged for a more extended period. Multilayer containers and bottles can also be made using preforms. It will then be shaped as desired with high-pressure air. It is enough to heat the Preform’s body to about 100 degrees Celsius and put it in the mold. This small volume contributes a lot to environmental measures and reduces costs.Īnother advantage of Preform is that it can be used to produce bottles and containers with various designs. It is possible to carry 300,000 to 400,000 preforms with a 10-ton truck. Although the preform volume depends on the shape of the final bottle, there is a volume difference of about 1/5 to 1/10 between the Preform and the final product. One of the advantages of Preform is its small volume. In the second stage, the PET preform hollow tubes are placed in a unique mold and turned into different containers and bottles. The size of the mouth of the PET preform produced at this stage will not change after the production of the bottle, and its size is the same as the final size of the mouth of the bottle. This long tube is the same as the PET preform. In the first stage, the PET becomes a long tube similar to a laboratory tube. Therefore, the production of plastic bottles with PET raw material is done in two stages: Therefore it is not possible to produce containers and plastic bottles of PET preform by extrusion of melt and blowing polymer in the mold. These are the favorable properties of PET that have led to using this material as a suitable material in the plastics industry.Īnother unique feature of PET is that this material in the molten state, unlike other raw materials for plastic production, lacks sufficient strength. Some of these features are transparency, lightness, high strength, optimal creep properties, low flavor absorption, high chemical resistance, beautiful appearance, more accessible access, and low price. Some of these materials are polyvinyl chloride or PVC, polyethylene or PE, polyethylene terephthalate or PET, etc.Īmong these materials, PET has its characteristics. Many of the bottles are made from PET preform.ĭifferent types of materials are used to make plastic bottles. The Preform is an intermediate product that Preform can convert into a variety of bottles. He adds that there are always such issues as questions about quality, consistency, shipment delays and shipping damages, but notes that in PET resin, those same objections have been overcome.The word preform means prefabricated. Maddox reminds us that preforms (less than 1 liter) have a bulk density similar to PET pellets, so that shipping cube is economical. “We know for sure that Gatronova of Pakistan has world-class injection equipment and supplies preforms broadly within Pakistan. So, will preforms start being imported too? Maddox says, his company has received emails from several companies, mostly from China or India, who think they can sell preforms in the USA. The success of these continued PET imports lies in both their cheaper prices, adequate quality, and supply lines that were not that long. It can still be imported-especially to the West Coast, cheaper than domestic production being shipped to the West Coast because railcar freight west of the Rockies is at a high premium. However, Maddox points out that excess domestic capacity has not kept PET resin imports from growing, and in fact has continued since the 2005 production disruptions that resulted from the disastrous Hurricane Katrina. Now, he sees this as the biggest hurdle for imported preforms-that they are widely available at low cost domestically. So everyone tries really hard to keep preform injection going-even, if it means “dumping-off” preforms at or near cost. ![]() ![]() This creates problems for the purchasing department who does not meet their purchasing commitments and this runs the risk of not getting the best price discounts. And perhaps as important-lack of PET resin purchased, says Maddox. Idle preform injection molding capacity creates real problems including excess people, layoffs, and higher overhead per unit. “In other words-related specifically to PET preforms-even those who self-manufacture their own preforms and bottles have been trying to sell-off excess capacity to merchant container suppliers.” He further points to those companies who are solely in the preform manufacturing business, noting that they are “regularly squeezed from all sides”. Maddox says, there is excess PET resin, excess preform capacity for most generic sizes-like CSD (carbonated soft drinks) and water, as well as excess blow molding capacity at container suppliers like Amcor, Graham, Plastipak and Berry, and self-manufacturers like Coke and Pepsi. Recycling Terminology Can Be a Minefield, So We Should Tread Lightly
0 Comments
Leave a Reply. |