tijmet The International Journal of Materials and Engineering Technology 2667-4033 Necip Fazıl YILMAZ Mechanical Engineering Makine Mühendisliği THERMAL SEAL FORCE OF COATED BIDIRECTIONAL STRETCHED PET FILM USED IN FOOD PACKAGING INDUSTRY https://orcid.org/0000-0003-3940-9500 Özahi Emrah GAZIANTEP UNIVERSITY, FACULTY OF ENGINEERING Tıkıloğlu Çağrı GAZİANTEP ÜNİVERSİTESİ, FEN BİLİMLERİ ENSTİTÜSÜ, ÜRÜN GELİŞTİRME VE TASARIM MÜHENDİSLİĞİ ANABİLİM DALI (DİSİPLİNLERARASI), ÜRÜN GELİŞTİRME VE TASARIM MÜHENDİSLİĞİ (YL) (TEZLİ) (İÖ) 12 31 2021 4 2 147 156 12 06 2021 12 27 2021 Copyright © 2018, The International Journal of Materials and Engineering Technology 2018 The International Journal of Materials and Engineering Technology

In addition to the mechanical and permeability properties of food packaging, heat sealing ability of packaging is critical in order to protect a product and extend its shelf life. Optimum temperature sealing is an essential necessity in the packaging industry. Important controlparameters for bonding are jaw temperature, jaw pressing time and jaw clamping force.Sufficient pressure must be applied to the surfaces to achieve acceptable adhesion. The physicalevaluation of an adhesion can provide a useful qualitative indicator of the effectiveness of theheat sealing process and is based on optimization of the parameters of dwell time, temperatureand process pressure. The purpose of this work is to define the effective jaw heat andcompression time for the seal strength of the surface coated PET film to the APET surface. Theanalysis of the thermal adhesion performance of the copolyster surface coated biaxially orientedPET (BOPET) film is brought to the literature. It will guide the determination of the processconditions of the packaging machine to be used after the film production in the sector. Thus, itwill contribute to production and energy efficiency as there will be analyzed data about therequired jaw temperature, jaw pressing time and pressing force in packaging machines. Theeffects of parameters on the seal strength were analyzed using the Box-Behnken design, which isa response surfaces methodology (RSM). Then, the significance of the variables was examinedby regression analysis. In the study, the correlation coefficient value was 0.995 and it is seen thatthe model represents 99.5% of the experiments. The most effective factor determined at the 0.05statistics significance level was jaw temperature.

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