Document B86DVZ382VkM7dGnxZp6KQzOk

VINYL FILM VBAA-9123 NATURAL EXTRACTION BY FOOD EQUIVALENTS Final Report autmomi ff. C. Johnson H. E. Persinger, Group Leader nciMOi oATtt 330-44A-V2 20299-F1 April 16, 1958 SUMMARY Bakelite VBAA-9123 Natural, a vinyl cast film designed for general food packaging, was examined to det mine the extractablllty~ of the zinc stearate with which it is stabilized. The four extractants used were: 4 per cent acetic acid, which simulates acid foods; Armour Oil, which typifies the fats; LockeRingers solution, which is isotonic to body fluids; and on per cent sodium bicarbonate, which represents the alkaline foods. Non of the simulated foods picked up as much as 0.1 part per million of zinc after contact with the film for 30 days at ambient temperatur . Inasmuch as a pick-up of up to 50 parts per million could be tolerated in foods, the results indicate that zinc stearate is a permissible component of the film. INTRODUCTION The Film and Sheeting Products Development Division of the Bakelite Company has formulated a non*-figid vinyl solution cast film designed for general food packaging and designated as VBAA-9123 Natural. The formulation of the film giv n in the following table was furnished by A. R. Buliman (1). Formulation of Cast Film VBAA-9123 Natural VYNW (vinyl chloride-acetate copolymer) Santicizer 141 (diphenyl mono octyl phosphate) Paraplex G-62 (epoxidized soybean oil) Zinc stearate Acrawax C (a synthetic wax) StearAi&de (stearic acid amide) Syoid 244 (silicone dioxide) 72.17 23.20 3.50 0.20 0.25 0.18 0.50 100.00 Development Department CARBIOC AND CARBON CHEMICALS COMPANY OUTM CMABLBBTON. WBBT VIMINIA ucc 063631 20299-F1 2 All th components of the film exc pt zinc stearat have been accepted for contact with meat and meat food products (2). This investigation was initiated to prove that zinc stearate do s not extract from the film and should also be accepted for use in food packaging material. R. H. Philbeck (2) has indicated that a cast film will be acceptable for use in food packaging if it contributes less than 50 parts per million of zinc to the enclosed product. DISCUSSION No specimen of cast film lost in zinc content and no extractant gained in zinc concentration. Detect ability of zinc was less than 0.01 ppm in Armour's Oil and 4 p r cent acetic acid solution, and less than 0.1 ppm in the Locke-Ringer and 1 per cent sodium bicarbonate solutions. We have concluded that no migration of zinc takes place between the cast film and the food equilvalents. PROCEDURE Portions of the film were placed in clean glass containers and the synthetic food equivalents added at a ratio of 250 ml to 100 square inches of film surface area. The food equivalents were: Armour's cooking oil, Locke-Ringer solution, 4 per cent acetic acid in water and 1 per cent sodium bicarbonate in water. The samples were extracted thirty days at room temperature with daily agitation. Both film and extractants were analyzed for zinc before and after the test. This extraction procedure was furnished by Dr. Henry F. Smyth, Jr. (3). The extractants and cast films were sulfated and the ash analyzed by an authoritative emission spectrographic procedure (4). BIBLIOGRAPHY 1. A. R. Bullman letter to W. B. Ackert, Bakelite Company, November 22, 1957, Development Department File 330-44A. 2. R. H. Philbeck letter to Dr. Thomas W. Nale, Unit d States Department of Agriculture, December 16, 1957, Development Department, File 330-44A. 3. H. F.Smyth letter to F. H. Roberts, Carbide and Carbon Chemicals Company, Mellon Institute, February 11, 1955, Development Department, File 330-44A-Y2-C3. 4. A. S. Mitteldorf, D. 0. , London, "Semiquantitative Spectrochemical Analysis Using Spex Standards," Applied Spectroscopy Vol. 10, pl2-l4 (1956). NOTEBOOK REFERENCE: EM-622-58 LABORATORY ACCOUNT: 817-0-8261 PERIOD: February 1 to April 1, 1958 wsd UCc 063632 X XtO X 20299-F1 DISTRIBUTION Mr. W. B. Ackart, 312 Mr. F. D. Dexter, 312 Mr. J. J. Glick, 312 Mr. R. W. King (2), 514 Dr. J. L. Marsh, NYO Dr. T. W. Nale, NYO Dr. H. F. Smyth, Jr., Mellon Mr. J. C. Wright, 312 Dr. W. F. Underwood, 354 Mr. J. W. Biddle Mr. G. L. Funk Mr. E. F. Hillenbrand, Jr. Mr. A. E. Montagna Dr. T. R. Miller Dr. H. W. Schulz Mr. C. R. Welter Library (2) INDEX LIST Food extraction Plastics Metals in food extracts Emission spectrograph ucc 063633