Closure systems for PET (Polyethylene Terephthalate) bottles and the effect on CO2 retention / Avaliação de sistemas de fechamento para embalagens de polietileno tereftalato (PET) na retenção de CO2

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

This study had the aim to evaluate CO2 retention in PET bottles filled with carbonated and drinkable water using different closure systems studied in 3 different storage conditions, 5, 25 and 35°C. It was evaluated 4 commercial closure systems: 3 of conventional type and one with O2 and CO2 gas barrier; and also it was developed a 5th kind for this experience: a hybrid closure system composed by plastic and metallic materials. All 5 types of closures were tested in 23g, 25g and 28g PET bottles of 600mL. The CO2 concentration in the carbonated water was weekly measured through the packaging free space pressure during 3 months. The results indicate that retention of CO2, in all closure systems tested, was straightly related with storage temperature. At 35°C for 25g and 28g bottle systems were observed significant different values. At 25°C storage condition, significant difference of gas retention was observed where a barrier closure was tested. At refrigerated temperature (5°C) only commercial closures were tested and all of them did not show ? in the studied period ? significant variation of CO2 retention

ASSUNTO(S)

bebidas carbonatadas pet bottles carbonated beverages garrafas pet vida de prateleira carbon dioxide shelf life dioxido de carbono retenção retention

ACESSO AO ARTIGO

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