Method of storing food or plant materials by wrapping with a stretched syndiotactic polystyrene film
AssigneeIdemitsu Kosan Co., Ltd.
InventorsKeisuke Funaki, Komei Yamasaki
Life of this patent
Estimating the term…
Abstract
A method of wrapping plant materials for storage by wrapping the plant materials with a food wrapping material obtained by stretching a styrene-based polymer film with mainly syndiotactic configuration. The wrapping material is transparent, has gloss and is excellent in physical properties such as gas permeability and heat resistance making it very useful in the method for wrapping material such as vegetables and fruits requiring permeation and diffusion of gases such as oxygen and carbon dioxide.
Claims15
A method of storing food materials including fruits or vegetables for an extended time comprising enclosing the fruit or vegetable with a wrapping material obtained by stretching a styrene polymer with a syndiotactic configuration, said polymer having a syndiotacticity in racemic pentad of at least 30%, and thereafter subjecting the polymer to heat treatment at a temperature ranging from about 120.degree. C. to 270.degree. C. for about 2 to 600 seconds, while holding the polymer in a tensed state.
A method of storing cut flowers for an extended time comprising enclosing the cut flowers with a wrapping material obtained by stretching a styrene polymer with a syndiotactic configuration, said polymer having a syndiotacticity in racemic pentad of at least 30%, and thereafter subjecting the polymer to heat treatment at a temperature ranging from about 120.degree. C. to 270.degree. C. for about 2 to 600 seconds, while holding the polymer in a tensed state.
Dependencies are inferred from the claim text.