PETpla.net Insider 08 / 2014

MATERIAL / RECYCLING 17 PET planet insider Vol. 15 Short cycle times, high shot-to-shot quality, low energy consumption and maximum flexibility. The new XFORM 300 with its unique 6-position post-mold cooling system boosts your output performance for the widest range of preforms. Cooling preforms faster and better, the 96-cavity platform is ideal for large runs and quick mold changes. And it lets you run any mold you want, old or new, OEM-built or not, in total freedom . From ultra-thin walled (with proprietary XMould™ technology) to wide mouth. XFORM 300 , low transformation cost, high value. SIPA S.p.A. - Via Caduti del Lavoro, 3 - 31029 Vittorio Veneto (TV) - Italy Tel. +39 0438 911511 - Fax +39 0438 912273 - e-mail: [email protected] www.sipa-xform.com Designed to adapt. Built to last. The new XFORM 300 IMAGINE THE LOWEST TRANSFORMATION COST. IN TOTAL FREEDOM. Bottle Platform have been promot- ing Design for Recycle Guidelines for PET Bottles. These recommendations encourage designers, converters and brands to consider PET recycling in the earliest stages of their product design process by integrating tech- nologies and additives that do not negatively affect the potential to recy- cle PET back into higher end appli- cations such as new bottle, film and sheet manufacturing. By specifying an AA scavenger that meets perfor- mance requirements and maintains polymer clarity and quality, brands and converters are in a better position to meet the envi- ronmental demands of the industry. AA scavenging solutions: Meeting performance and quality criteria A comparative mould- ing study of an anthranila- mide versus a polyamide- based AA scavenging system was carried out. Figures 1 and 2 (see page 19) represent the chemical reaction of both solutions with AA. The ring closing reaction of the anthranila- mide formulation in Figure 1 creates a stable adduct to help prevent the migra- tion of AA. Test method and results Samples were prepared on an 80-ton injection moulding machine fitted with a four-impression test plaque mould. The machine was run under standard laboratory condi- tions for PET. The process was allowed to run with virgin, bottle grade PET resin for 30min in order to purge degraded material from the machine barrel and to allow the machine to approach equilibrium conditions for AA genera- tion. Parts were sampled at this point to form an initial control. The polyamide formulation was added to the process at 0.1%, 0.2% and 0.3%. The anthra- nilamide formulation was then added at various addition rates up to 0.3%. Between each test, the machine was purged with virgin PET, without stop- ping the machine cycle. A series of control samples was taken to confirm that the machine was running at equi- librium. AA Scavenging performance Sample mouldings were reduced to a powder by freezing them with liquid nitrogen before milling them in a rotary cutting mill. The powder samples were analysed for AA using headspace gas chromatography. The methodology is based on that described in ASTM 2013-1.