Articles

Temperature Resistant Evaluation of the Baking Processed Goods

Authors:

Vereshchagin A.L., Bychin N.V.

Abstract:

The article concerns the temperature resistant of baking sheet materials (parchment, parchment imitation, silicone coated parchment, polyethylene terephthalate, polydimethylsiloxane, fluoroplastic coated fiberglass) by the synchronous thermal analysis method – joint differential thermal analysis and thermogravimetry application by heating samples on the air up to 500 °C with heating rate of 10 degrees in a minute. The intensive decomposition temperature starts at the range of 250-260 °C for the parchment imitation, 235-250 °C for the parchment, and 220 °C for silicone coated parchment. The melting temperature of the baking PET bags is 251 °C, and the melting temperature of the PET oven bag varies from 252.6 to 255 °C. In the polydimethylsiloxane sample the mass loss during primary heating to a temperature of 200° C was from 0.54 to 1.23 %, and the mass onset loss temperature varied from 55 to 120 °C. Reheating reduces the desorbed impurities amount in the temperature range up to 200° C from 1.03 to 0.55 %. In this regard, it is advisable to preheat firstly the organosilicon polymer products for the safe use at the baking temperature for 30 minutes. Teflon coated fibreglass (PTFE) is lack of weight loss till 300 °C and the only endoeffect at 327 °C corresponded to the starting temperature of sintered polytetrafluoroethylene melting. Among the studied baking processed goods for multiple use a polytetrafluoroethylene coated anti-stick mat made of fiberglass is the most heat-resistant and least contact.

Keywords:

temperature resistant; baking materials; thermal analysis; parchment; polyethylene terephthalate; polydimethylsiloxane; fluoroplastic