包装商品の開封応力メカニズムの解析とその制御方法

摘要

"The difficulty openability" of the Cup, Tray and Film packaging are an important problem of the packaging mentioned in the primacy problem of UD of packaged goods. The ASTM F88-07a (enactment in 1968) which becomes a worldwide standard of the heat sealing management is clarified with "It is the achievement of openability and closability which the ultimate problem of the heat sealing technique is a basic function of the packaging". However, rational measures are unfinished still. Openability and Closability have expectation function which is contrary in the equal mechanical characteristic each other. Tear opening method of "notch" system has been applied to many present goods. In this method, it becomes "refuse" on the table, potsherds such as broken bag scatter, and the packaging function after it duo to the difficulty of resealing has been lost. The following item is discussed about the flexible packaging goods in this paper.rn1) The standardization of the stress mechanism of [The pluck opening] is attempted.rn2) It clarifies the mutual relationship of Six Elements concerning the openability.rn3) Evaluation and improvement of the openability of the market goods are shown by this study.%ヒートシールによるプラスチック包装材料の熱接着はrn半世紀以上の歴史があり，プラスチック材料の包装利用rnに大きな貢献をしている．消費者にとって重安な包装のrn基本機能は扱いやすさ，すなわち開け易さである．他rn方，製造者は「封楓性」を優先する余り必要以上の接着rn強さを発現させるために材料の増厚をしている．