Plastics Technology

JAN 2019

Plastics Technology - Dedicated to improving Plastics Processing.

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'Eco-Friendly' Rust Remover & Rust Preventative Upgraded PET Preform System Runs Longer Without Maintenance It's water-based, environmentally safe, EPA tested, nontoxic, non-hazardous, non-flammable and non-aerosol. So says iD Additives about its new Eco-Pro 360, which reportedly removes mill oil, flash rust, and white rust without etching. What's more, it provides a protective coating for long- term rust protection and does not need to be removed before the mold goes back into production. Eco-Pro 360 is a new product category for iD Additives, a supplier of colorants, foaming agents, UV stabilizers, and purging compounds. It reportedly "cleans, coats and seals" injection molds, blown film dies, and other tooling. It also can be reused many times after filtering out any rust particles. TOOLING INJECTION MOLDING The XForm 500 PET preform injection molding system from SIPA of Italy has been upgraded again for longer mold life between maintenance cycles. Previ- ously, the Gen3 system cold halves were guaranteed to run for 8 million cycles with no flash over 0. 2 mm. Now, a new surface treatment and durable mold structure with very low deformation allows for a 40% longer guaranteed period—11 million cycles—without maintenance. Since the 500-ton system can run preform molds with up to 180 cavities, it could produce almost 2 billion preforms without mold maintenance. The system is also said to stand out for its speed (lock-to-lock times below 2.5 sec), versatility (accepting any generation of legacy preform tooling from any major moldmaker), and energy efficiency. Faster Mold Changes For PET ISBM Machine A new quick-mold-change (QMC) system from SIPA of Italy for its ECS SP single-stage injection stretch-blow molding (ISBM) machines reportedly slashes changeover times by about 25%. New features also include added safety and user-friendliness. These hybrid machines are suited to molding containers for pharmaceuticals, cosmetics, personal-care products, and spirits, especially in sizes from 20 to 50 ml. They come with injection clamps of 55 and 88 tons. The QMC system involves a new automated procedure for loading/unloading the preform core plates; this incorporates additional sensors to ensure that the mold-opening stroke is adjusted to the preform length. Operations for assembling and disassembling the neck-ring plate have also been modified. A new, patent- pending system now allows the procedure to be carried out safely by one person instead of two. Changing the blow mold is much easier, too, SIPA says. Addition of roller bearings in critical positions means that once a forklift positions the mold next to the clamp unit, the tool can be pushed into position by hand. Height adjustment of the mold in the clamp is also easier. Finally, modifications have been made to the sealing plate and stretch rods, and standard screw fittings for the water-cooling system are replaced by quick-fit push/pull fittings. BLOW MOLDING BLOW MOLDING Base Inversion Enhances Hot-Fill PET Bottles Weight savings and design flexibility that allows for "product premium- ization" are promised by the new BoostPrime packaging solution for hot-fill PET bottles from Sidel. It removes the need for restrictive vacuum panels or gas addition to enable bottles to resist hot-filling temperatures up to 85-88 C. The patented solution is aimed at single-serve bottles of up to 1.2 L for juice, nectar, soft drinks, isotonics and tea (JNSDIT). The final bottle shape is achieved with an "active base inversion" and relies on three key features that are said to have minor impact on the package production line layout: • The package design requires specific base geometry and specifications. • The Base Overstroke System (BOSS) allows mechanical forming of the bottle base during blowing. • An inverter contributes to base inversion, which takes place after filling, capping, tilting and cooling and before labeling. It balances the negative pressure induced by beverage cooling in the bottle from filling to ambient temperature. In addition, BoostPrime reportedly decreases the weight of current hot-fill bottles by up to 30%, or 3 to 7 g. It also allows producers to save as much as 90% on label material by switching from a sleeve to roll-fed operation. Payback for a new 1L hot-fill PET line can be as little as one year, Sidel says. The first BoostPrime hot-fill lines are running in Mexico, where a customer has nearly 50 SKUs in production for juice, tea and isotonics. Bottle weight savings are up to 32% for a 237-ml bottle. 44 JANUARY 2019 Plastics Technology Blow Molding With Technology Keeping Up PRODUCT FOCUS

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