Materials Performance Supplements


Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.

Issue link:

Contents of this Issue


Page 16 of 23

of cross direction (CD) tear strength. The sample with all in-house repro appears to have somewhat better properties than the one made with commercial repro. The com- mercial repro used in this study was from a different source than the material used in the monolayer films. In the coextruded films, there was no significant increase in unmelts in films made with the commercial repro. The data in Table 4 show an experiment with a different grade of film. This uses only 10% repro in the center layer (5% of film). It again shows no significant degradation of film physical properties. Conclusions It is shown by the data presented in this article that it is feasible to make VCI packaging films using repro resins with no or minimal compromises in physical properties. Films containing up to 20% repro were demonstrated. In-house pro- duced repro is generally superior due to its contribution of VCI to the final product, along with better consistency and generally reduced levels of contamination. From a cost perspective, commercial repro is gen- erally about half the price of virgin resin. In-house repro can be significantly lower in cost, depending on the specific equipment used and local labor costs. One further advantage of in-house repro- cessing is the elimination of shipping; either one-way (purchase of commercial repro) or two-way (shipping scrap to the preprocessor and the return transit of the repro to the film facility). This produces significant environ- mental advantages in addition to the cost savings. The structure of coextruded films makes them especially well suited for incor- poration of repro, as it can be "buried" in the middle layer with even less effect on bulk physical properties and VCI performance. Depending on the quality of in-house repro, it is likely that loading levels significantly greater than 20% can be achieved with good processability and film performance. Acknowledgements The authors thank Tim Bliss, Stephanie Berg, Snježana Mikolic´, and Ivana Radic´ Boršic´ for data and assistance in preparing this article. References 1 B. Miksic, R. Boyle, B. Wuertz, NACE Inter- national 2004 F.N. Speller Award Lecture: "Efficacy of Vapor Phase Corrosion Inhibitor Technology in Manufacturing," Corrosion 60, 6 (2004): pp. 515-522. 2. V.A Goldade, L.S. Pinchuk, A.V. Makarevich, V.N. Kestelman, "Films Incorporating Corro- sion Inhibitors," Plastics for Corrosion Inhibi- tion (2005): pp 81-173. 3. S.M. Al-Salem, P. Lettieri, J. Baeyens, "Recy- cling and Recovery Routes of Plastic Solid Waste (PSW): A Review," Waste Management 29, 10 (2009): pp. 2625-2643. 4. F. Vilaplana, S. Karlsson, "Quality Concepts for the Improved Use of Recycled Polymeric Ma- terials: A Review," Macromol. Mater. Eng. 293, 4 (2008): pp. 274-297. 5. A STM D6988, " St an d ard Gui d e for D e- termination of Thickness of Plastic Film Test Specimens" (West Conshohocken, PA: ASTM, 2013). 6. ASTM D822, "Standard Test Method for Ten- sile Properties of Thin Plastic Sheeting" (West Conshohocken, PA: ASTM, 2002). 7. ASTM D1709, "Standard Test Methods for Impact Resistance of Plastic Film by the Free- Falling Dart Method" (West Conshohocken, PA: ASTM, 2004). 8. ASTM D1922, "Standard Test Method for Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method" (West Conshohocken, PA: ASTM, 2006). 9. ASTM D1894, "Standard Test Method for Static and Kinetic Coefficients of Friction of Plastic Film and Sheeting " (West Consho- hocken, PA: ASTM, 2014). 10. ASTM F88, "Standard Test Method for Seal Strength of Flexible Barrier Materials" (West Conshohocken, PA: ASTM, 1999). 11. MIL-STD-3010, Test Method 2065, "Puncture Resistance" (Washington, DC: U.S. Dept. of Defense, 2002). 12. R .M. Patel , T.I. Butler, K.L. Walton, G.W. Knight, "Investigation of Processing-Struc- ture- Properties Relationships in Polyethylene Blown Films," Polym. Eng. Sci. 34 (1994): pp. 1506–1514. 13. K. Gillette, B. Berg, M. Kharshan, "Modern Advances in Environmentally Friendly Va- por-Phase Corrosion Inhibiting Coatings: Expanding the Realm of VpCI Packaging," CORROSION 2009, paper no. 09486 (Houston, TX: NACE International, 2009), p. 14. This article is based on CORROSION 2016 paper no. 7283, presented in Vancouver, British Columbia, Canada. ROBERT T. KEAN is the director of Cortec Laboratories at Cortec Corp., 4119 White Bear Pkwy., St. Paul, MN 55110. Prior to joining Cortec in 2009, he worked at NatureWorks LLC (formerly Cargill Dow) and at Cargill, Inc., in various technical roles. He has a Ph.D. in physical chemistry from Michigan State University and is a member of NACE International. BORIS A. MIKSIC, FNACE, is president and chief executive offcer of Cortec Corp. He has served in this capacity for 39 years. Cortec is the global leader in the manufacturing of corrosion inhibitors in several industries, including modern plastic products. Miksic holds more than 43 U.S. and foreign patents and patent applications and has presented papers throughout the world. He received the NACE International F.N. Speller Award for longtime contributions to corrosion engineering. A NACE Fellow, he has been a NACE member for more than 40 years. Improved Packaging Film Incorporating Vapor Phase Corrosion Inhibitors and High Recycle Content TABLE 4. COEXTRUDED FILMS Property Units No Repro 10% Repro (Mid Layer) In House Caliper — μm 100 100 Breaking Factor MD N 59.76 60.25 TD 61.83 58.92 Tensile Strength at Break MD MPa 24.13 23.25 TD 26.70 24.89 Elongation at Break MD % 448.00 432.60 TD 949.40 928.50 Tear Strength MD mN 5,127.36 4,604.16 CD 16,847.04 16,376.16 Impact Puncture — N 19,567.68 19,724.64 — J 1.69 1.70 Coeffcient of Friction Kinetic — 0.22 0.22 Static — 0.24 0.24 17 CORTEC SUPPLEMENT TO MP MATERIALS PERFORMANCE JUNE 2016

Articles in this issue

Archives of this issue

view archives of Materials Performance Supplements - CORTEC 2016